@import url("https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap");

:root {
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --bg: #eef1f6;
  --surface: #ffffff;
  --text: #1e293b;
  --text-muted: #64748b;
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --primary-soft: #e8f0fe;
  --accent: #4285f4;
  --border: #e2e8f0;
  --header-bg: rgba(255, 255, 255, 0.88);
  --header-text: #1e293b;
  --gcp-blue: #4285f4;
  --gcp-red: #ea4335;
  --gcp-yellow: #fbbc04;
  --gcp-orange: #fa7b17;
  --gcp-orange-dark: #e37400;
  --gcp-green: #34a853;
  --success: #059669;
  --success-bg: #ecfdf5;
  --error: #dc2626;
  --error-bg: #fef2f2;
  --warn: #d97706;
  --warn-bg: #fffbeb;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 40px rgba(15, 23, 42, 0.12);
  --radius: 10px;
  --header-h: 56px;
  --layout-max: 1100px;
  --layout-pad: 1.25rem;
}

html {
  scrollbar-gutter: stable;
}

/* Một cột nội dung: logo, hero, pricing, footer cùng mép */
.site-shell {
  box-sizing: border-box;
  width: 100%;
  max-width: var(--layout-max);
  margin-inline: auto;
  padding-inline: var(--layout-pad);
}

.layout-rail {
  box-sizing: border-box;
  width: 100%;
  max-width: var(--layout-max);
  margin-inline: auto;
  padding-inline: var(--layout-pad);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  background-color: #f4f7fc;
  background-image:
    radial-gradient(ellipse 90% 60% at 50% -15%, rgba(66, 133, 244, 0.18), transparent 55%),
    radial-gradient(ellipse 55% 45% at 100% 20%, rgba(52, 168, 83, 0.1), transparent 50%),
    radial-gradient(ellipse 50% 40% at 0% 80%, rgba(251, 188, 4, 0.09), transparent 45%),
    radial-gradient(ellipse 40% 30% at 85% 95%, rgba(234, 67, 53, 0.06), transparent 40%);
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary-dark);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  margin-inline: calc(-1 * var(--layout-pad));
  padding-inline: var(--layout-pad);
  width: calc(100% + 2 * var(--layout-pad));
  background: transparent;
  border-bottom: none;
}

.site-header::before {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  top: 0;
  bottom: 0;
  background: var(--header-bg);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(66, 133, 244, 0.12);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.9) inset, 0 4px 20px rgba(66, 133, 244, 0.08);
  z-index: -1;
}

.site-header-inner {
  position: relative;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-shell .site-header-inner,
.site-shell > .page,
.site-shell > .site-footer {
  max-width: none;
  margin-inline: 0;
  padding-inline: 0;
}

.site-header-inner.layout-rail {
  padding-block: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--header-text);
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
  color: var(--primary-dark);
}

.brand-logo {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  display: block;
  object-fit: contain;
}

.brand-lockup {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  min-width: 0;
}

.brand-product {
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: #3c4043;
}

.brand-text {
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--text-muted);
  max-width: min(200px, 42vw);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.auth-mount {
  display: flex;
  align-items: center;
  min-height: 40px;
}

.auth-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.auth-user-menu-wrap {
  position: relative;
}

.auth-user-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  max-width: min(280px, 44vw);
  padding: 0.28rem 0.65rem 0.28rem 0.28rem;
  border: 1.5px solid color-mix(in srgb, var(--primary) 28%, var(--border));
  border-radius: 999px;
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 55%, #eff6ff 100%);
  color: var(--text);
  cursor: pointer;
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1.2;
  box-shadow:
    0 1px 2px rgba(15, 23, 42, 0.06),
    0 4px 14px rgba(37, 99, 235, 0.12);
  transition:
    border-color 0.15s ease,
    box-shadow 0.15s ease,
    transform 0.12s ease;
}

.auth-user-trigger:hover {
  border-color: color-mix(in srgb, var(--primary) 55%, var(--border));
  box-shadow:
    0 2px 4px rgba(15, 23, 42, 0.08),
    0 6px 18px rgba(37, 99, 235, 0.18);
  transform: translateY(-1px);
}

.auth-user-trigger--premium {
  border-color: color-mix(in srgb, #f59e0b 45%, var(--primary) 25%);
  background: linear-gradient(135deg, #fffbeb 0%, #ffffff 45%, #eff6ff 100%);
  box-shadow:
    0 1px 2px rgba(15, 23, 42, 0.06),
    0 4px 16px rgba(245, 158, 11, 0.22),
    0 0 0 1px rgba(251, 191, 36, 0.15);
}

.auth-user-trigger--premium:hover {
  box-shadow:
    0 2px 6px rgba(15, 23, 42, 0.08),
    0 8px 22px rgba(245, 158, 11, 0.28);
}

.auth-user-menu-wrap--open .auth-user-trigger,
.auth-user-trigger[aria-expanded="true"] {
  border-color: var(--primary);
  background: linear-gradient(135deg, #eff6ff 0%, #ffffff 100%);
  box-shadow:
    0 0 0 3px color-mix(in srgb, var(--primary) 22%, transparent),
    0 8px 22px rgba(37, 99, 235, 0.2);
  transform: translateY(-1px);
}

.auth-user-menu-wrap--open .auth-user-trigger--premium,
.auth-user-trigger--premium[aria-expanded="true"] {
  border-color: #f59e0b;
  box-shadow:
    0 0 0 3px rgba(251, 191, 36, 0.35),
    0 8px 22px rgba(245, 158, 11, 0.25);
}

.auth-user-trigger .auth-avatar--fallback {
  width: 32px;
  height: 32px;
  font-size: 0.8125rem;
  box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.15);
}

.auth-user-trigger--premium .auth-avatar--fallback {
  background: linear-gradient(145deg, #fde68a, #fef3c7);
  color: #92400e;
  box-shadow: inset 0 0 0 1px rgba(245, 158, 11, 0.35);
}

.auth-user-trigger-text {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-width: 0;
}

.auth-user-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: #0f172a;
  font-size: 0.8125rem;
  font-weight: 600;
  min-width: 0;
}

.auth-user-chevron {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.35rem;
  height: 1.35rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--primary) 12%, transparent);
  color: var(--primary-dark);
  flex-shrink: 0;
  transition: transform 0.2s ease, background 0.15s ease;
}

.auth-user-chevron-svg {
  width: 0.85rem;
  height: 0.85rem;
}

.auth-user-menu-wrap--open .auth-user-chevron,
.auth-user-trigger[aria-expanded="true"] .auth-user-chevron {
  transform: rotate(180deg);
  background: color-mix(in srgb, var(--primary) 22%, transparent);
}

.auth-user-menu {
  position: absolute;
  top: calc(100% + 0.5rem);
  right: 0;
  min-width: 272px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  border: 1px solid color-mix(in srgb, var(--primary) 18%, var(--border));
  border-radius: 14px;
  box-shadow:
    0 4px 6px rgba(15, 23, 42, 0.04),
    0 16px 40px rgba(15, 23, 42, 0.14);
  padding: 0.45rem;
  z-index: 120;
  animation: auth-user-menu-in 0.18s ease-out;
}

@keyframes auth-user-menu-in {
  from {
    opacity: 0;
    transform: translateY(-6px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.auth-user-menu.hidden {
  display: none;
}

.auth-user-menu-head {
  padding: 0.55rem 0.65rem 0.65rem;
  margin-bottom: 0.35rem;
  border-radius: 10px;
  background: linear-gradient(135deg, #eff6ff 0%, #f0fdf4 100%);
  border: 1px solid color-mix(in srgb, var(--primary) 15%, transparent);
}

.auth-user-menu-head-name {
  margin: 0;
  font-size: 0.875rem;
  font-weight: 700;
  color: #0f172a;
  line-height: 1.3;
}

.auth-user-menu-head-email {
  margin: 0.2rem 0 0;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  word-break: break-all;
}

.auth-user-menu-items {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.auth-user-menu-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  width: 100%;
  text-align: left;
  padding: 0.55rem 0.6rem;
  border: 1px solid transparent;
  background: #ffffff;
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  border-radius: 10px;
  cursor: pointer;
  color: #0f172a;
  transition:
    background 0.15s ease,
    border-color 0.15s ease,
    box-shadow 0.15s ease,
    transform 0.12s ease;
}

.auth-user-menu-item:hover,
.auth-user-menu-item:focus-visible {
  outline: none;
  border-color: color-mix(in srgb, var(--primary) 25%, transparent);
  background: linear-gradient(90deg, #eff6ff 0%, #ffffff 100%);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.12);
  transform: translateX(2px);
}

.auth-user-menu-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 10px;
  flex-shrink: 0;
}

.auth-user-menu-svg {
  width: 1.15rem;
  height: 1.15rem;
}

.auth-user-menu-icon--profile {
  background: linear-gradient(145deg, #dbeafe, #bfdbfe);
  color: #1d4ed8;
}

.auth-user-menu-icon--payments {
  background: linear-gradient(145deg, #d1fae5, #a7f3d0);
  color: #047857;
}

.auth-user-menu-icon--logout {
  background: linear-gradient(145deg, #fee2e2, #fecaca);
  color: #b91c1c;
}

.auth-user-menu-label {
  flex: 1;
  min-width: 0;
}

.auth-user-menu-item--logout {
  margin-top: 0.15rem;
  border-top: 1px solid color-mix(in srgb, var(--error) 12%, var(--border));
  border-radius: 10px;
  padding-top: 0.65rem;
}

.auth-user-menu-item--logout .auth-user-menu-label {
  color: #b91c1c;
}

.auth-user-menu-item--logout:hover,
.auth-user-menu-item--logout:focus-visible {
  border-color: color-mix(in srgb, var(--error) 35%, transparent);
  background: linear-gradient(90deg, #fef2f2 0%, #ffffff 100%);
  box-shadow: 0 4px 12px rgba(220, 38, 38, 0.12);
}

.user-detail-body {
  font-size: 0.875rem;
}

.user-detail-dl {
  margin: 0;
}

.user-detail-dl > div {
  margin-bottom: 0.75rem;
  padding: 0.65rem 0.75rem;
  border-radius: 10px;
  background: #f8fafc;
  border: 1px solid var(--border);
}

.user-detail-dl dt {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.15rem;
}

.user-detail-dl dd {
  margin: 0;
  font-weight: 500;
}

.user-detail-empty,
.user-detail-error,
.user-detail-loading {
  margin: 0;
  color: var(--text-muted);
}

.user-detail-error {
  color: var(--error);
}

.user-payment-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.user-payment-item {
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border);
}

.user-payment-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.user-payment-scope {
  margin: 0 0 0.25rem;
  font-weight: 600;
  font-size: 0.875rem;
}

.user-payment-meta {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.auth-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.auth-avatar--fallback {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-size: 0.75rem;
  font-weight: 600;
}

.btn-sm {
  padding: 0.25rem 0.55rem;
  font-size: 0.75rem;
}

.auth-signin-slot {
  min-height: 40px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.auth-header-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.modal--auth {
  max-width: 400px;
  text-align: left;
}

.auth-form .field {
  display: block;
  margin-bottom: 0.75rem;
}

.auth-form .field span {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.auth-form input {
  width: 100%;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
}

.auth-form-error {
  margin: 0 0 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--error);
  background: var(--error-bg);
  border: 1px solid color-mix(in srgb, var(--error) 35%, transparent);
  border-radius: 8px;
  padding: 0.5rem 0.65rem;
}

.auth-form-error.hidden {
  display: none;
}

.auth-register-success {
  margin-bottom: 0.5rem;
}

.auth-register-success.hidden {
  display: none;
}

.auth-register-success-msg {
  margin: 0 0 1rem;
  font-size: 0.875rem;
  line-height: 1.45;
  color: var(--text);
  background: color-mix(in srgb, #059669 12%, var(--surface));
  border: 1px solid color-mix(in srgb, #059669 35%, var(--border));
  border-radius: 8px;
  padding: 0.65rem 0.75rem;
}

.auth-form.hidden {
  display: none;
}

.auth-switch.hidden {
  display: none;
}

.auth-form .field.field--error > span {
  color: var(--error);
}

.auth-form input.input--error {
  border-color: var(--error);
  background: var(--error-bg);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--error) 18%, transparent);
}

.auth-form input.input--error:focus {
  outline: none;
  border-color: var(--error);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--error) 25%, transparent);
}

.auth-switch {
  margin: 0.75rem 0 0;
  text-align: center;
}

.btn-link {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary-dark);
  cursor: pointer;
  text-decoration: underline;
}

.upgrade-login-hint {
  margin: 0 0 0.65rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-align: center;
}

.upgrade-login-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}

.auth-gate {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(4px);
}

.auth-gate-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 1.75rem 1.5rem;
  max-width: 400px;
  width: 100%;
  text-align: center;
}

.auth-gate-card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
}

.auth-gate-card p {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

body.auth-locked .page,
body.auth-locked .site-footer {
  pointer-events: none;
  user-select: none;
}

.nav-links a {
  color: var(--text-muted);
}

.nav-links a:hover {
  color: var(--primary-dark);
}

.nav-links a.nav-link-payments {
  color: var(--text);
  font-weight: 600;
  padding: 0.38rem 0.75rem;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid var(--border);
  background: var(--surface);
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.nav-links a.nav-link-payments:hover {
  color: var(--primary-dark);
  background: var(--primary-soft);
  border-color: color-mix(in srgb, var(--primary) 30%, var(--border));
}

body[data-page="payments"] .nav-links a.nav-link-payments {
  color: var(--primary-dark);
  background: var(--primary-soft);
  border-color: color-mix(in srgb, var(--primary) 35%, var(--border));
}

.nav-links a.nav-link-certs {
  color: var(--text);
  font-weight: 600;
  padding: 0.38rem 0.75rem;
  border-radius: 999px;
  text-decoration: none;
  border: 1px solid var(--border);
  background: var(--surface);
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.nav-links a.nav-link-certs:hover {
  color: var(--primary-dark);
  background: var(--primary-soft);
  border-color: color-mix(in srgb, var(--primary) 30%, var(--border));
}

body[data-page="certs"] .nav-links a.nav-link-certs {
  color: var(--primary-dark);
  background: var(--primary-soft);
  border-color: color-mix(in srgb, var(--primary) 35%, var(--border));
}

.nav-unlock-pro {
  display: inline-flex;
  align-items: center;
  padding: 0.42rem 0.9rem;
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: #fff !important;
  text-decoration: none;
  background: linear-gradient(135deg, #7c3aed 0%, #2563eb 48%, #06b6d4 100%);
  box-shadow: 0 2px 12px rgba(37, 99, 235, 0.35);
  transition: filter 0.15s, box-shadow 0.15s, transform 0.1s;
}

.nav-unlock-pro:hover {
  color: #fff !important;
  text-decoration: none;
  filter: brightness(1.07);
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.45);
}

.nav-unlock-pro:active {
  transform: scale(0.98);
}

.site-header .lang-select {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
}

.premium-chip {
  font-size: 0.62rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.18rem 0.5rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #fcd34d, #f59e0b);
  color: #422006;
  flex-shrink: 0;
  box-shadow: 0 1px 3px rgba(245, 158, 11, 0.45);
}

.site-header .auth-user-name {
  color: var(--text);
}

.lang-select {
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.35rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  max-width: 11rem;
}

.lang-select:focus {
  outline: 2px solid var(--primary-soft);
  border-color: var(--primary);
}

.page.layout-rail,
.site-shell > .page {
  padding-block: 1.25rem 2.5rem;
}

.site-shell > .page {
  padding-inline: 0;
}

.hero-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(232, 240, 254, 0.95) 100%);
  color: var(--text);
  border: 1px solid rgba(66, 133, 244, 0.14);
  border-radius: 14px;
  padding: 1.75rem 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: 0 8px 24px rgba(66, 133, 244, 0.08);
}

.hero-card h1 {
  margin: 0 0 0.35rem;
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 700;
  color: #0f172a;
}

.hero-card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.badge {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.25);
  margin-top: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  border: none;
  border-radius: 8px;
  padding: 0.55rem 1rem;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-dark);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary-dark);
}

.btn-premium {
  background: linear-gradient(180deg, #fb923c 0%, var(--gcp-orange) 100%);
  color: #fff;
  border: 1px solid var(--gcp-orange-dark);
  box-shadow:
    0 1px 2px rgba(15, 23, 42, 0.06),
    0 4px 14px rgba(250, 123, 23, 0.38);
}

.btn-premium:hover {
  background: linear-gradient(180deg, var(--gcp-orange) 0%, #d9650a 100%);
  color: #fff;
  border-color: #c25709;
  box-shadow:
    0 2px 4px rgba(15, 23, 42, 0.08),
    0 6px 18px rgba(250, 123, 23, 0.45);
  text-decoration: none;
}

a.btn-premium {
  color: #fff;
}

a.btn-premium:hover {
  color: #fff;
}

.btn-danger {
  background: var(--error);
  color: #fff;
}

.btn-danger:hover {
  background: #b91c1c;
}

.btn-warning {
  background: var(--warn-bg);
  color: #92400e;
  border: 1px solid #fcd34d;
}

.btn-warning:hover {
  background: #fde68a;
  border-color: var(--warn);
}

.btn-review {
  background: var(--error-bg);
  color: #991b1b;
  border: 1px solid #fca5a5;
}

.btn-review:hover {
  background: #fee2e2;
  border-color: var(--error);
}

.btn-lg {
  padding: 0.75rem 1.35rem;
  font-size: 0.95rem;
}

.cert-search-wrap {
  margin: 0 0 1rem;
  max-width: 26rem;
}

.cert-search-field {
  position: relative;
  display: flex;
  align-items: center;
}

.cert-search-icon {
  position: absolute;
  left: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  color: #94a3b8;
  pointer-events: none;
}

.cert-search-input {
  width: 100%;
  padding: 0.58rem 0.95rem 0.58rem 2.45rem;
  font: inherit;
  font-size: 0.875rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: var(--shadow);
  transition:
    border-color 0.15s ease,
    box-shadow 0.15s ease;
}

.cert-search-input::placeholder {
  color: #94a3b8;
}

.cert-search-input:hover {
  border-color: color-mix(in srgb, var(--primary) 25%, var(--border));
}

.cert-search-input:focus {
  outline: none;
  border-color: color-mix(in srgb, var(--primary) 55%, var(--border));
  box-shadow:
    0 0 0 3px color-mix(in srgb, var(--primary) 18%, transparent),
    var(--shadow);
}

.cert-search-empty {
  margin: 0.5rem 0 0;
  padding: 0.85rem 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
}

.exam-list {
  margin-top: 0.25rem;
}

.exam-tier-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  align-items: start;
}

.exam-tier {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  min-width: 0;
  padding: 0.85rem 0.75rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.exam-tier-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.exam-tier-title {
  margin: 0;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--primary-dark);
}

.exam-tier .exam-row {
  flex-direction: column;
  align-items: stretch;
  gap: 0.65rem;
  padding: 0.85rem 0.9rem;
  box-shadow: none;
}

.exam-tier .exam-row-footer {
  width: 100%;
}

.exam-tier .exam-row-footer .btn {
  width: auto;
}

.exam-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  box-shadow: var(--shadow);
  transition: border-color 0.15s;
}

.exam-row:hover {
  border-color: var(--primary);
}

.exam-row.disabled {
  opacity: 0.5;
  pointer-events: none;
}

.exam-row h2 {
  margin: 0 0 0.2rem;
  font-size: 1rem;
  font-weight: 600;
}

.exam-row-title {
  margin: 0 0 0.2rem;
  font-size: 1rem;
  font-weight: 600;
}

.exam-row-title-text {
  display: block;
}

.exam-row-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 0.75rem;
  width: 100%;
  margin-top: auto;
}

.exam-row-footer .exam-pro-badge {
  margin-left: auto;
  margin-top: 0;
}

.exam-pro-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  flex-shrink: 0;
  margin-top: 0.05rem;
  padding: 0.15rem 0.45rem 0.15rem 0.35rem;
  border-radius: 999px;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1;
  border: 1px solid transparent;
}

.exam-pro-badge--unlocked {
  color: #065f46;
  background: linear-gradient(145deg, #ecfdf5, #d1fae5);
  border-color: color-mix(in srgb, #059669 35%, transparent);
}

.exam-pro-badge--locked {
  color: #64748b;
  background: #f1f5f9;
  border-color: #e2e8f0;
}

.exam-row--pro-unlocked {
  border-color: color-mix(in srgb, #059669 28%, var(--border));
  background: linear-gradient(
    135deg,
    var(--surface) 0%,
    color-mix(in srgb, #ecfdf5 45%, var(--surface)) 100%
  );
}

.exam-row--pro-locked {
  border-color: var(--border);
}

.exam-row p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.exam-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem 1rem;
  margin: 0;
}

.exam-q-count {
  font-weight: 600;
  color: var(--text);
}

.exam-row .exam-q-count {
  color: #374151;
}

.exam-q-count-num {
  display: inline-block;
  font-size: 1.05rem;
  font-weight: 800;
  color: #15803d;
  line-height: 1.2;
  margin-right: 0.1rem;
}

.setup-cert-meta {
  margin: 0.35rem 0 0;
}

.setup-cert-meta .setup-total {
  font-weight: 600;
  color: var(--text);
}

.exam-updated {
  font-size: 0.8125rem;
  color: #4b5563;
}

.exam-row .exam-updated {
  color: #5f6b7a;
}

.hero-card .setup-cert-meta {
  margin-top: 0.65rem;
}

.hero-card .setup-cert-meta .exam-meta {
  flex-direction: column;
  align-items: flex-start;
  gap: 0.4rem;
}

.hero-card .setup-cert-meta .setup-total {
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  line-height: 1.45;
}

.hero-card .setup-cert-meta .exam-q-count-num {
  color: var(--primary-dark);
  font-size: 1.15rem;
}

.hero-card .setup-cert-meta .exam-updated {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 500;
}

#setup-panel.panel {
  border-color: rgba(26, 115, 232, 0.22);
  background: linear-gradient(180deg, #f3f8ff 0%, var(--surface) 140px);
  box-shadow: 0 10px 28px rgba(26, 115, 232, 0.1);
}

.setup-hero-card {
  margin: 0 0 1.15rem;
  background: linear-gradient(125deg, #1557b0 0%, #1a73e8 40%, #4285f4 100%);
  color: #fff;
  border: none;
  box-shadow: 0 10px 28px rgba(26, 115, 232, 0.28);
}

.setup-hero-card h1 {
  color: #fff;
}

.setup-hero-card .setup-cert-meta,
.setup-hero-card .setup-cert-meta .exam-meta,
.setup-hero-card .setup-cert-meta .setup-total,
.setup-hero-card .setup-cert-meta .exam-updated {
  color: rgba(255, 255, 255, 0.92);
}

/* Beat .hero-card .setup-cert-meta .exam-q-count-num (primary-dark blue) */
.hero-card.setup-hero-card .setup-cert-meta .exam-q-count-num {
  color: #ffb347;
  font-size: 1.25rem;
  font-weight: 800;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.22);
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}

.panel h3 {
  margin: 0 0 0.75rem;
  font-size: 0.95rem;
  font-weight: 600;
}

.form-grid {
  display: grid;
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .form-grid.two {
    grid-template-columns: 1fr 1fr;
  }
}

label.field {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
}

label.field input,
label.field select {
  font-family: inherit;
  font-size: 0.9rem;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.radio-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  font-size: 0.875rem;
}

.radio-row label {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  cursor: pointer;
  color: var(--text);
}

.mode-hint {
  margin: 0.35rem 0 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.segmented {
  display: inline-flex;
  flex-wrap: nowrap;
  gap: 0.25rem;
  padding: 0.25rem;
  padding-top: 0.55rem;
  background: var(--primary-soft);
  border: 1px solid var(--border);
  border-radius: 10px;
  max-width: 100%;
  overflow: visible;
}

.segmented--wrap {
  flex-wrap: wrap;
}

.segmented-item.hidden {
  display: none !important;
}

.payment-method-picker.hidden {
  display: none;
}

.segmented-item {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
}

.segmented-item input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  margin: 0;
  pointer-events: none;
}

.segmented-item > span,
.segmented-item > .segmented-label {
  display: block;
  padding: 0.55rem 0.85rem;
  font-size: 0.84rem;
  font-weight: 600;
  line-height: 1.25;
  text-align: center;
  border-radius: 8px;
  cursor: pointer;
  color: var(--text-muted);
  user-select: none;
  transition: background 0.15s, color 0.15s, box-shadow 0.15s;
  white-space: nowrap;
}

.segmented-item > .segmented-label {
  position: relative;
}

.segmented--wrap .segmented-item > span,
.segmented--wrap .segmented-item > .segmented-label {
  white-space: normal;
}

.segmented-item:hover > span,
.segmented-item:hover > .segmented-label {
  color: var(--primary-dark);
}

.segmented-item input:checked + span,
.segmented-item input:checked + .segmented-label {
  background: var(--surface);
  color: var(--primary-dark);
  box-shadow: 0 1px 3px rgba(26, 115, 232, 0.18);
}

.segmented-item input:focus-visible + span,
.segmented-item input:focus-visible + .segmented-label {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.sticky-bar {
  position: sticky;
  top: var(--header-h);
  z-index: 90;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0.65rem 0;
  margin: 0 -1rem 1rem;
  padding-left: 1rem;
  padding-right: 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  font-size: 0.8rem;
}

.stat-pill {
  background: var(--bg);
  border-radius: 999px;
  padding: 0.25rem 0.65rem;
  font-weight: 500;
}

.stat-pill strong {
  color: var(--primary-dark);
}

.timer-pill {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--warn);
}

.question-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.15rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}

.question-card.hidden-q {
  display: none;
}

.q-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.q-head-titles {
  flex: 1;
  min-width: 12rem;
}

.q-discussion-title {
  margin: 0.45rem 0 0;
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}

.q-badge {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary-dark);
  background: var(--primary-soft);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
}

.q-actions-top {
  display: flex;
  gap: 0.35rem;
}

.btn-icon {
  padding: 0.35rem 0.55rem;
  font-size: 0.75rem;
}

.btn-mark.btn-mark--active {
  background: #fef9c3;
  border-color: #eab308;
  color: #854d0e;
  font-weight: 700;
}

.btn-mark.btn-mark--active:hover {
  background: #fde047;
  border-color: #ca8a04;
  color: #713f12;
}

.q-body {
  font-size: 0.95rem;
  margin-bottom: 0.85rem;
}

.q-body img {
  max-width: 100%;
  height: auto;
}

#quiz-screen.exam-session:not(.exam-submitted) .q-footer,
#quiz-screen.exam-session:not(.exam-submitted) .btn-check,
#quiz-screen.exam-session:not(.exam-submitted) .btn-reset {
  display: none !important;
}

.choices {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.choice {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.12s, background 0.12s;
}

.choice:hover {
  border-color: var(--primary);
  background: #f8fafc;
}

.choice.selected {
  border-color: var(--accent);
  background: #eff6ff;
}

.choice.correct {
  border-color: var(--success);
  background: var(--success-bg);
}

.choice.incorrect {
  border-color: var(--error);
  background: var(--error-bg);
}

.choice input {
  margin-top: 0.2rem;
}

.choice-letter {
  font-weight: 700;
  min-width: 1.25rem;
}

.q-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.85rem;
}

.feedback {
  margin-top: 0.65rem;
  font-size: 0.875rem;
  display: none;
}

.feedback.show {
  display: block;
}

.feedback.success {
  color: var(--success);
}

.feedback.error {
  color: var(--error);
}

.feedback.info {
  color: var(--text-muted);
}

.vote-panel {
  margin-top: 0.75rem;
  padding: 0.65rem;
  background: var(--bg);
  border-radius: 8px;
  font-size: 0.82rem;
}

.vote-bar {
  display: flex;
  height: 28px;
  border-radius: 6px;
  overflow: hidden;
  margin: 0.35rem 0;
}

.vote-segment {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 600;
  color: #fff;
  min-width: 2px;
  cursor: help;
  outline: none;
}

.vote-segment-pct,
.vote-segment-count {
  padding: 0 2px;
  text-align: center;
  line-height: 1.15;
}

.vote-segment-count {
  display: none;
}

.vote-segment:hover .vote-segment-pct,
.vote-segment:focus-visible .vote-segment-pct {
  display: none;
}

.vote-segment:hover .vote-segment-count,
.vote-segment:focus-visible .vote-segment-count {
  display: block;
}

.vote-distribution-title {
  margin: 0.5rem 0 0.25rem;
  font-style: italic;
  color: var(--text-muted);
  font-size: 0.78rem;
}

.vote-legend {
  margin: 0.35rem 0 0;
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.overlay.hidden {
  display: none;
}

.overlay--auth {
  z-index: 250;
}

.modal {
  background: var(--surface);
  border-radius: 14px;
  max-width: 480px;
  width: 100%;
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
  max-height: 90vh;
  overflow-y: auto;
}

.modal h2 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
}

.modal p {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.score-big {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin: 0.5rem 0;
}

.history-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.history-list li {
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}

.site-footer.layout-rail,
.site-shell > .site-footer {
  margin-top: 2.5rem;
  padding-block: 1.5rem 2rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-align: center;
  border-top: 1px solid var(--border);
}

.site-shell > .site-footer {
  margin-inline: calc(-1 * var(--layout-pad));
  padding-inline: var(--layout-pad);
  width: calc(100% + 2 * var(--layout-pad));
}

.site-footer-inner {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.site-footer-contact a {
  font-weight: 600;
  color: var(--primary-dark);
}

.site-footer-note {
  margin: 0;
  font-size: 0.75rem;
  opacity: 0.85;
}

.site-footer-domain {
  font-weight: 600;
  color: var(--primary-dark);
  text-decoration: none;
}

.site-footer-domain:hover {
  text-decoration: underline;
}

.nav-links a.nav-active {
  color: var(--primary-dark);
  font-weight: 600;
}

body[data-page="checkout"] .nav-unlock-pro {
  box-shadow:
    0 0 0 2px rgba(255, 255, 255, 0.85),
    0 2px 14px rgba(37, 99, 235, 0.4);
}

.page-intro {
  margin-bottom: 1.25rem;
}

.page-intro h1 {
  margin: 0 0 0.4rem;
  font-size: 1.5rem;
}

.page-intro-lead {
  margin: 0;
  color: var(--text-muted);
  max-width: 42rem;
}

.pricing-qr-wrap {
  text-align: center;
  padding: 0.75rem;
  margin: 0.25rem 0 0.5rem;
  background: var(--primary-soft);
  border-radius: 12px;
  border: 1px dashed rgba(66, 133, 244, 0.35);
}

.pricing-qr-wrap--compact {
  padding: 0.5rem;
}

.pricing-qr-label {
  margin: 0 0 0.5rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary-dark);
}

.pricing-qr-hint {
  margin: 0.5rem 0 0;
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.checkout-domestic-qr {
  width: 100%;
  max-width: 216px;
  margin: 0;
  box-sizing: border-box;
}

.checkout-domestic-qr .checkout-qr-frame {
  position: relative;
  display: block;
  width: 100%;
  max-width: 200px;
  margin: 0 auto;
  line-height: 0;
  overflow: hidden;
  border-radius: 8px;
}

.checkout-domestic-qr .pricing-qr-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 200px;
  margin: 0 auto;
  vertical-align: top;
}

.checkout-qr-frame {
  position: relative;
  display: inline-block;
  max-width: 100%;
}

.checkout-domestic-qr.checkout-domestic-qr--paid .pricing-qr-img {
  opacity: 0.32;
  filter: grayscale(0.2);
}

.checkout-qr-success-line {
  margin: 0 0 0.5rem;
  font-size: 0.8125rem;
  font-weight: 700;
  color: #047857;
  text-align: center;
  line-height: 1.35;
}

.checkout-qr-paid-overlay {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  pointer-events: none;
}

.checkout-qr-paid-overlay:not(.hidden) {
  display: flex !important;
}

.checkout-qr-paid-check {
  width: 3rem;
  height: 3rem;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.65rem;
  font-weight: 800;
  color: #065f46;
  background: linear-gradient(145deg, #a7f3d0, #6ee7b7);
  box-shadow: 0 6px 18px rgba(16, 185, 129, 0.35);
}

.checkout-qr-paid-text {
  font-size: 0.8125rem;
  font-weight: 700;
  color: #047857;
}

.pricing-qr-img {
  display: inline-block;
  border-radius: 8px;
  background: #fff;
  padding: 4px;
  box-shadow: var(--shadow);
}

.hidden {
  display: none !important;
}

.page-quiz.layout-rail {
  max-width: var(--layout-max);
}

.quiz-layout {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.quiz-sidebar-column {
  flex: 0 0 240px;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
  position: sticky;
  top: var(--header-h);
  height: calc(100vh - var(--header-h));
  align-self: flex-start;
}

.quiz-back-link {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.35rem 0.5rem;
  margin: 0;
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary-dark);
  cursor: pointer;
  border-radius: 6px;
  transition: background 0.15s, color 0.15s;
}

.quiz-back-link:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

.setup-back-link {
  display: inline-flex;
  margin-bottom: 0.75rem;
  text-decoration: none;
}

.setup-back-link:hover {
  text-decoration: none;
}

.setup-order-section {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.setup-export-row {
  display: flex;
  justify-content: flex-end;
  min-height: 0;
}

.setup-export-wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem;
}

.btn-export-pdf {
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.45rem 0.85rem;
  white-space: nowrap;
  border: 2px solid #34a853;
  color: #15803d;
  background: #fff;
}

.btn-export-pdf:hover {
  border-color: #15803d;
  background: #ecfdf5;
  color: #166534;
}

@media (max-width: 640px) {
  .setup-export-row {
    justify-content: stretch;
  }
  .setup-export-wrap {
    width: 100%;
  }
  .btn-export-pdf {
    width: 100%;
  }
}

.quiz-sidebar {
  width: 100%;
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem;
  box-shadow: var(--shadow);
}

.sidebar-body {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 2px;
  margin-right: -2px;
}

.sidebar-toolbar {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.sidebar-stats {
  font-size: 0.82rem;
  line-height: 1.65;
  margin-bottom: 0.65rem;
  color: var(--text-muted);
}

.sidebar-stats strong {
  color: var(--text);
  font-weight: 700;
}

.sidebar-stats .stat-num {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary-dark);
  letter-spacing: 0.02em;
}

.sidebar-stats .stat-num--ok {
  color: #15803d;
}

.sidebar-stats .stat-num--bad {
  color: #b91c1c;
}

.q-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 5px;
  margin-bottom: 0.65rem;
}

.q-cell {
  aspect-ratio: 1;
  min-height: 32px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  color: var(--text);
  font-size: 0.72rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  padding: 0;
  transition: transform 0.1s, box-shadow 0.1s;
}

.q-cell:hover {
  box-shadow: 0 0 0 2px var(--primary-soft);
  transform: scale(1.05);
}

.q-cell.pending {
  background: #fff;
}

.q-cell.answered {
  background: var(--primary);
  border-color: var(--primary-dark);
  color: #fff;
}

.q-cell.marked {
  background: #fde047;
  border-color: #eab308;
  color: #713f12;
}

.q-cell.correct {
  background: var(--success);
  border-color: #047857;
  color: #fff;
}

.q-cell.wrong {
  background: var(--error);
  border-color: #b91c1c;
  color: #fff;
}

.q-cell.active {
  box-shadow: 0 0 0 2px var(--accent);
}

.sidebar-legend {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.sidebar-legend span {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  border: 1px solid var(--border);
  display: inline-block;
}

.dot.pending { background: #fff; }
.dot.answered { background: var(--primary); border-color: var(--primary-dark); }
.dot.marked { background: #fde047; border-color: #eab308; }
.dot.correct { background: var(--success); border-color: #047857; }
.dot.wrong { background: var(--error); border-color: #b91c1c; }

.btn-block {
  width: 100%;
}

.timer-pill {
  display: block;
  text-align: center;
  padding: 0.4rem;
  background: var(--warn-bg);
  border-radius: 8px;
  font-size: 1.1rem;
}

.quiz-main {
  flex: 1;
  min-width: 0;
  min-height: calc(100vh - var(--header-h));
}

.quiz-main-header {
  position: sticky;
  top: var(--header-h);
  z-index: 85;
  margin-bottom: 1rem;
  box-shadow: var(--shadow);
}

.hero-compact {
  padding: 1rem 1.15rem;
  margin-bottom: 0;
}

.hero-compact h1 {
  font-size: 1.15rem;
  margin: 0;
}

.quiz-main-header.quiz-session-hero {
  border: none;
  box-shadow: 0 8px 22px rgba(26, 115, 232, 0.22);
}

.quiz-main-header.quiz-session-hero h1 {
  color: #fff;
  font-size: clamp(1.05rem, 2.5vw, 1.25rem);
  font-weight: 700;
}

@media (max-width: 960px) {
  .exam-tier-grid {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
}

@media (max-width: 900px) {
  .quiz-layout {
    flex-direction: column;
  }
  .quiz-sidebar-column {
    width: 100%;
    flex: none;
    position: static;
    height: auto;
    max-height: min(70vh, 520px);
  }
  .quiz-sidebar {
    max-height: min(65vh, 480px);
  }
  .quiz-main {
    min-height: 0;
  }
  .q-grid {
    grid-template-columns: repeat(8, 1fr);
  }
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.landing-hero {
  color: var(--text);
  border-radius: 10px;
  padding: 1rem 1.1rem;
  margin-bottom: 1.5rem;
  background: #fff;
  border: 1px solid rgba(26, 115, 232, 0.55);
  box-shadow: var(--shadow);
}

.landing-eyebrow {
  margin: 0 0 0.4rem;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #1a73e8;
}

.landing-hero h1 {
  margin: 0 0 0.85rem;
  font-size: clamp(1.2rem, 2.4vw, 1.6rem);
  line-height: 1.28;
  letter-spacing: -0.025em;
  font-weight: 700;
  color: #0f172a;
}

.landing-lead {
  margin: 0 0 0.85rem;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: #475569;
  max-width: 36rem;
}

/* Hai cột thẳng hàng (stat/nút); khoảng cách giống .landing-stats flex ban đầu */
.landing-hero-cta-grid {
  display: grid;
  grid-template-columns: auto auto;
  gap: 1.25rem 2rem;
  margin-top: 0.85rem;
  width: fit-content;
  max-width: 100%;
}

.landing-hero-cta-grid .landing-stats {
  display: contents;
}

.landing-hero-cta-grid .landing-stats li:nth-child(1) {
  grid-column: 1;
  grid-row: 1;
}

.landing-hero-cta-grid .landing-stats li:nth-child(2) {
  grid-column: 2;
  grid-row: 1;
}

.landing-hero-actions {
  display: contents;
  margin: 0;
}

.landing-hero-cta-grid .landing-hero-actions .btn:nth-child(1) {
  grid-column: 1;
  grid-row: 2;
}

.landing-hero-cta-grid .landing-hero-actions .btn:nth-child(2) {
  grid-column: 2;
  grid-row: 2;
}

.landing-hero-actions .btn {
  justify-self: stretch;
  width: 100%;
  box-sizing: border-box;
}

.landing-stats {
  list-style: none;
  margin: 0;
  padding: 0;
}

.landing-stats li {
  display: grid;
  grid-template-rows: 1.75rem auto;
  row-gap: 0.2rem;
  justify-items: center;
  align-content: start;
  box-sizing: border-box;
  min-width: 8.25rem;
  font-size: 0.75rem;
  line-height: 1.35;
  color: #64748b;
  text-align: center;
  padding: 0.5rem 0.85rem;
  background: var(--primary-soft);
  border: 1px solid rgba(26, 115, 232, 0.12);
  border-radius: 10px;
}

.landing-stats strong {
  grid-row: 1;
  align-self: center;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  margin: 0;
  font-size: 1.35rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: #1557b0;
}

.landing-stats li > span {
  grid-row: 2;
  display: block;
  width: 100%;
  max-width: 11rem;
}

.landing-hero .landing-stats {
  margin: 0;
}

.landing-features {
  margin-bottom: 1.75rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.15rem;
  box-shadow: var(--shadow);
  transition:
    transform 0.28s cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 0.28s ease,
    border-color 0.22s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  border-color: color-mix(in srgb, var(--primary) 38%, var(--border));
  box-shadow:
    0 14px 32px rgba(15, 23, 42, 0.11),
    0 4px 14px rgba(26, 115, 232, 0.1);
}

.feature-icon {
  display: inline-block;
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  transition: transform 0.28s cubic-bezier(0.22, 1, 0.36, 1);
}

.feature-card:hover .feature-icon {
  transform: scale(1.12) translateY(-2px);
}

.feature-card h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
}

.feature-card p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.section-title {
  margin: 0 0 1rem;
  font-size: 1.35rem;
}

.landing-pricing {
  margin: 0 0 1.5rem;
  max-width: 42rem;
  width: 100%;
}

.landing-pricing .section-title {
  font-size: 1.05rem;
  margin-bottom: 0.75rem;
}

.pricing-lead {
  margin: 0 0 0.85rem;
  font-size: 0.875rem;
  line-height: 1.55;
  color: var(--text-muted);
  max-width: 42rem;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  width: 100%;
  max-width: 42rem;
}

.pricing-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 0.9rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.pricing-card--highlight {
  border-color: #93c5fd;
  box-shadow: 0 6px 18px rgba(37, 99, 235, 0.1);
}

.pricing-card h3 {
  margin: 0;
  font-size: 0.9375rem;
}

.pricing-card-name {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.pricing-pro-crown {
  flex-shrink: 0;
  color: #ea580c;
  filter: drop-shadow(0 1px 1px rgba(234, 88, 12, 0.25));
}

.pricing-price {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--primary-dark);
}

.pricing-list {
  margin: 0;
  padding-left: 1.1rem;
  flex: 1;
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.pricing-list li {
  margin: 0.4rem 0;
}

.pricing-list li:first-child {
  margin-top: 0.15rem;
}

.pricing-list li:last-child {
  margin-bottom: 0.1rem;
}

.landing-pricing .btn {
  font-size: 0.8125rem;
  padding: 0.45rem 0.75rem;
}

.btn-block {
  width: 100%;
}

.landing-certs {
  margin-bottom: 2rem;
}

.page-checkout {
  max-width: 1060px;
  margin: 0 auto;
}

.checkout-panel {
  padding: 0 0 1.5rem;
  overflow: hidden;
}

.checkout-panel-head {
  margin: 0 0 1.15rem;
  padding: 1.15rem 1.35rem 1.1rem;
  background: linear-gradient(125deg, #1557b0 0%, #1a73e8 40%, #4285f4 100%);
  color: #fff;
  box-shadow: 0 8px 24px rgba(26, 115, 232, 0.22);
}

.checkout-panel-head .pro-plan-eyebrow {
  color: rgba(255, 255, 255, 0.92);
}

.checkout-panel-head .checkout-title {
  margin: 0;
  color: #fff;
}

.checkout-panel-body {
  padding: 0 1.35rem;
}

.checkout-layout {
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  gap: 1.35rem;
  align-items: start;
}

.checkout-invoice {
  background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  border: 1px solid color-mix(in srgb, var(--primary) 15%, var(--border));
  border-radius: 14px;
  padding: 1.15rem 1.15rem 1rem;
  box-shadow: 0 8px 28px rgba(15, 23, 42, 0.06);
  position: sticky;
  top: calc(var(--header-h, 64px) + 0.75rem);
}

.checkout-invoice-title {
  margin: 0 0 1rem;
  font-size: 1rem;
  font-weight: 700;
  color: #0f172a;
}

.checkout-invoice-product {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 0.85rem 0.9rem;
  margin-bottom: 1rem;
  border-radius: 12px;
  background: linear-gradient(135deg, #eff6ff 0%, #fef3c7 100%);
  border: 1px solid color-mix(in srgb, #f59e0b 25%, var(--primary) 20%);
}

.checkout-invoice-product-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 999px;
  background: linear-gradient(145deg, #fbbf24, #f59e0b);
  color: #422006;
  font-size: 1rem;
  font-weight: 800;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(245, 158, 11, 0.35);
}

.checkout-invoice-product-name {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 800;
  color: #0f172a;
  line-height: 1.35;
}

.checkout-invoice-product-sub {
  margin: 0.25rem 0 0;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-muted);
  line-height: 1.35;
}

.checkout-invoice-dl {
  margin: 0;
}

.checkout-invoice-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.55rem 0;
  border-bottom: 1px dashed color-mix(in srgb, var(--border) 80%, transparent);
}

.checkout-invoice-row:last-child {
  border-bottom: none;
}

.checkout-invoice-row dt {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
}

.checkout-invoice-row dd {
  margin: 0;
  font-size: 0.8125rem;
  font-weight: 600;
  color: #0f172a;
  text-align: right;
}

.checkout-invoice-row--amount {
  flex-direction: column;
  align-items: stretch;
  gap: 0.35rem;
  padding-top: 0.75rem;
  margin-top: 0.25rem;
  border-top: 2px solid color-mix(in srgb, var(--primary) 20%, var(--border));
  border-bottom: none;
}

.checkout-invoice-row--amount dt {
  font-size: 0.875rem;
  color: #0f172a;
}

.checkout-invoice-amount {
  font-size: clamp(1.65rem, 4vw, 2rem) !important;
  font-weight: 800 !important;
  color: #1d4ed8 !important;
  text-align: left !important;
  letter-spacing: -0.02em;
}

.payment-method-segmented--two .segmented-item {
  flex: 1;
}

.checkout-domestic-grid {
  display: grid;
  grid-template-columns: minmax(0, 216px) minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  margin-top: 0.5rem;
}

.checkout-domestic-webhook-note {
  margin-top: 0.85rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.checkout-sepay-wrap {
  margin-bottom: 1rem;
}

.checkout-sepay-wrap .payment-panel-note {
  margin-top: 0.65rem;
}

.checkout-domestic-waiting {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-top: 1rem;
  padding: 0.75rem 0.85rem;
  border-radius: 10px;
  background: #fffbeb;
  border: 1px solid #fcd34d;
  font-size: 0.875rem;
  font-weight: 600;
  color: #92400e;
}

.checkout-domestic-waiting.hidden {
  display: none !important;
}

@media (max-width: 560px) {
  .checkout-domestic-grid {
    grid-template-columns: 1fr;
  }
}

.checkout-pay-col {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem 1.1rem 1.15rem;
}

.checkout-bank-amount {
  font-size: 1.15rem;
  font-weight: 800;
  color: #1d4ed8;
}

.checkout-pending {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin-top: 1rem;
  padding: 0.75rem 0.85rem;
  border-radius: 10px;
  background: #eff6ff;
  border: 1px solid color-mix(in srgb, var(--primary) 25%, transparent);
  font-size: 0.8125rem;
  font-weight: 600;
  color: #1e40af;
}

.checkout-pending-spinner {
  width: 1rem;
  height: 1rem;
  border: 2px solid #93c5fd;
  border-top-color: #1d4ed8;
  border-radius: 50%;
  animation: checkout-spin 0.7s linear infinite;
}

@keyframes checkout-spin {
  to { transform: rotate(360deg); }
}

.checkout-success-overlay {
  z-index: 260;
}

.checkout-success-modal {
  max-width: 420px;
  text-align: center;
  padding: 1.75rem 1.5rem 1.5rem;
  position: relative;
}

.checkout-success-modal-icon {
  width: 3.25rem;
  height: 3.25rem;
  margin: 0 auto 0.85rem;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.65rem;
  font-weight: 800;
  color: #065f46;
  background: linear-gradient(145deg, #a7f3d0, #6ee7b7);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.35);
}

.checkout-success-modal h2 {
  margin: 0 0 0.35rem;
  color: #065f46;
}

.checkout-success-popup-lead {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.checkout-success-popup-dl {
  margin: 0 0 1.15rem;
  text-align: left;
  font-size: 0.8125rem;
}

.checkout-success-popup-dl > div {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--border);
}

.checkout-success-popup-dl dt {
  color: var(--text-muted);
  font-weight: 600;
}

.checkout-success-popup-dl dd {
  margin: 0;
  font-weight: 700;
  color: #0f172a;
}

.checkout-success-popup-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
}

.page-payments {
  max-width: 880px;
  margin: 0 auto;
}

.payments-panel {
  padding: 0 0 2rem;
}

.payments-back {
  display: inline-block;
  margin: 1rem 1.35rem 0.5rem;
}

.payments-panel-head {
  padding: 0 1.35rem 1rem;
}

.payments-title {
  margin: 0 0 0.35rem;
  font-size: clamp(1.25rem, 3vw, 1.55rem);
}

.payments-lead {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.payments-gate,
.payments-loading,
.payments-empty,
.payments-error {
  padding: 0 1.35rem;
}

.payments-empty {
  text-align: center;
  padding-top: 1rem;
}

.payments-error {
  color: var(--error);
  font-weight: 600;
}

.payments-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 0 1.35rem;
}

.payments-card {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1rem 1.1rem;
  background: linear-gradient(180deg, #fff 0%, #f8fafc 100%);
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.05);
}

.payments-card-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.75rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

.payments-card-product {
  margin: 0;
  font-size: 0.9375rem;
  font-weight: 800;
  color: #0f172a;
}

.payments-card-amount {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 800;
  color: #1d4ed8;
  white-space: nowrap;
}

.payments-card-dl {
  margin: 0;
  display: grid;
  gap: 0.45rem;
}

.payments-card-dl > div {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  font-size: 0.8125rem;
}

.payments-card-dl dt {
  color: var(--text-muted);
  font-weight: 600;
}

.payments-card-dl dd {
  margin: 0;
  font-weight: 600;
  text-align: right;
}

.payments-status {
  display: inline-block;
  padding: 0.12rem 0.45rem;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
}

.payments-status--ok {
  background: #dcfce7;
  color: #166534;
}

@media (max-width: 820px) {
  .checkout-layout {
    grid-template-columns: 1fr;
  }

  .checkout-invoice {
    position: static;
  }
}

.checkout-title {
  margin: 0 0 0.75rem;
  font-size: clamp(1.25rem, 3vw, 1.55rem);
  color: #0f172a;
}

.checkout-back {
  display: inline-block;
  margin: 1rem 1.35rem 0.5rem;
}

.checkout-payment {
  margin-top: 0.5rem;
}

.checkout-payment.checkout-awaiting-login .payment-method-picker,
.checkout-payment.checkout-awaiting-login .payment-panel,
.checkout-payment.checkout-awaiting-login .checkout-pending,
.checkout-payment.checkout-awaiting-login .checkout-domestic-waiting {
  display: none;
}

.upgrade-login-hint--required {
  color: var(--gcp-red);
  font-weight: 600;
}

.checkout-dev-grant {
  margin: 1.25rem 0 0;
  padding: 1rem 1.05rem;
  border: 1px dashed #f59e0b;
  border-radius: 10px;
  background: #fffbeb;
}

.checkout-dev-grant-hint {
  margin: 0 0 0.75rem;
  font-size: 0.8125rem;
  line-height: 1.45;
  color: #92400e;
  font-weight: 500;
}

.checkout-error {
  margin: 1rem 0 0;
  color: var(--gcp-red);
  font-size: 0.875rem;
  font-weight: 500;
}

.checkout-activate-wrap {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(15, 23, 42, 0.08);
}

.checkout-activate-wrap .payment-panel-note {
  margin: 0.65rem 0 0;
}

.checkout-success {
  margin-top: 1.25rem;
  padding: 1.25rem 1.1rem;
  border-radius: 12px;
  background: linear-gradient(135deg, #ecfdf5 0%, #f0fdf4 100%);
  border: 1px solid rgba(16, 185, 129, 0.35);
}

.checkout-success-title {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: #065f46;
}

.checkout-success-lead {
  margin: 0 0 1rem;
  color: #047857;
  font-size: 0.925rem;
}

.checkout-success .btn {
  margin-right: 0.5rem;
  margin-bottom: 0.35rem;
}

.modal--upgrade {
  max-width: 440px;
  text-align: left;
}

.overlay--pro-plans {
  padding: 1rem;
  align-items: flex-start;
  overflow-y: auto;
}

.modal--pro-plans {
  position: relative;
  max-width: 980px;
  width: 100%;
  margin: 1rem auto 2rem;
  padding: 1.35rem 1.25rem 1.5rem;
  text-align: left;
}

.pro-plan-close {
  position: absolute;
  top: 0.65rem;
  right: 0.75rem;
  width: 2rem;
  height: 2rem;
  border: none;
  border-radius: 999px;
  background: #f1f5f9;
  color: #475569;
  font-size: 1.35rem;
  line-height: 1;
  cursor: pointer;
}

.pro-plan-eyebrow {
  margin: 0 0 0.25rem;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #7c3aed;
}

.pro-plan-title {
  margin: 0 0 0.35rem;
  padding-right: 2rem;
  font-size: clamp(1.15rem, 2.5vw, 1.45rem);
  line-height: 1.25;
  color: #0f172a;
}

.pro-plan-lead {
  margin: 0 0 1rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.55;
  max-width: 40rem;
}

.pro-plan-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.pro-plan-grid--catalog {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.75rem;
  align-items: stretch;
  padding-top: 0.85rem;
}

.pro-plan-grid--catalog .pro-plan-card {
  height: 100%;
  min-height: 100%;
  padding-top: 1.1rem;
}

.pro-plan-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: 0.95rem 0.95rem 1rem;
  border: 2px solid #dbeafe;
  border-radius: 14px;
  background: linear-gradient(180deg, #fff 0%, #f8fbff 100%);
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.1s;
}

.pro-plan-card--featured {
  border-color: #c4b5fd;
  background: linear-gradient(180deg, #fff 0%, #f5f3ff 100%);
}

.pro-plan-card--selected {
  border-color: #2563eb;
  box-shadow: 0 10px 28px rgba(37, 99, 235, 0.18);
}

.pro-plan-card--featured.pro-plan-card--selected {
  border-color: #7c3aed;
  box-shadow: 0 12px 32px rgba(124, 58, 237, 0.2);
}

.pro-plan-ribbon {
  position: absolute;
  top: 0;
  left: 50%;
  right: auto;
  transform: translate(-50%, -50%);
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #f59e0b, #ea580c);
  color: #fff;
  font-size: 0.625rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(234, 88, 12, 0.35);
  z-index: 2;
  pointer-events: none;
}

.pro-plan-duration {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  background: #e8f0fe;
  color: #1557b0;
  font-size: 0.6875rem;
  font-weight: 700;
}

.pro-plan-card-head {
  min-height: 2.75rem;
  display: flex;
  align-items: flex-start;
}

.pro-plan-card-title {
  margin: 0;
  padding-right: 0;
  font-size: 1.05rem;
  line-height: 1.25;
  color: #0f172a;
}

.pro-plan-card-sub {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.45;
  min-height: 2.4em;
}

.pro-plan-features {
  margin: 0.15rem 0 0;
  padding: 0 0 0 1.1rem;
  flex: 1 1 auto;
  font-size: 0.8125rem;
  color: #475569;
  line-height: 1.65;
}

.pro-plan-card .pro-plan-select {
  margin-top: auto;
  flex-shrink: 0;
}

.pro-plan-features li {
  margin: 0.4rem 0;
}

.pro-plan-pricing {
  margin: 0.35rem 0 0.15rem;
  padding: 0.65rem 0.75rem;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid #e2e8f0;
  min-height: 4.35rem;
  box-sizing: border-box;
}

.pro-plan-card--featured .pro-plan-pricing {
  background: rgba(255, 255, 255, 0.85);
  border-color: #ddd6fe;
}

.pro-plan-pricing-top {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-bottom: 0.35rem;
}

.pro-plan-pricing-term {
  font-size: 0.9375rem;
  font-weight: 700;
  color: #0f172a;
}

.pro-plan-discount-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.45rem;
  border-radius: 6px;
  background: #22c55e;
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.2;
}

.pro-plan-price-row {
  display: flex;
  align-items: baseline;
  flex-wrap: nowrap;
  gap: 0.35rem 0.45rem;
}

.pro-plan-price-main {
  font-size: 1.55rem;
  font-weight: 800;
  color: #0f172a;
  line-height: 1.1;
  letter-spacing: -0.02em;
  white-space: nowrap;
  flex: 0 1 auto;
  min-width: 0;
}

.pro-plan-grid--catalog .pro-plan-price-main {
  font-size: 1.38rem;
  letter-spacing: -0.025em;
}

.pro-plan-grid--catalog .pro-plan-price-was {
  font-size: 0.8125rem;
}

.pro-plan-currency-unit {
  font-size: 0.92em;
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.pro-plan-price-was {
  font-size: 0.8125rem;
  font-weight: 500;
  color: #94a3b8;
  text-decoration: line-through;
  text-decoration-thickness: 1px;
  white-space: nowrap;
  flex-shrink: 0;
}

.pro-plan-price-per-month {
  margin: 0.35rem 0 0;
  font-size: 0.75rem;
  font-weight: 500;
  color: #64748b;
  line-height: 1.35;
}

.pro-plan-card--featured .pro-plan-price-main {
  color: #5b21b6;
}

.pro-plan-billing {
  margin: 0;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.pro-plan-select--featured {
  background: linear-gradient(135deg, #7c3aed 0%, #2563eb 100%);
  border: none;
}

.pro-plan-select--featured:hover {
  filter: brightness(1.06);
}

.pro-plan-checkout {
  margin-top: 1.15rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}

.pro-plan-checkout-title {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.pro-plan-checkout-summary {
  margin: 0 0 0.65rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.pro-plan-checkout-cert {
  margin: -0.35rem 0 0.65rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary-dark);
}

.pro-plan-checkout-price {
  margin: 0 0 0.75rem;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--primary-dark);
}

.upgrade-flow-step {
  margin-top: 0.25rem;
}

.upgrade-flow-step.hidden {
  display: none;
}

.upgrade-flow-back {
  display: inline-block;
  margin: 0 0 0.65rem;
  padding: 0;
  border: none;
  background: none;
  color: var(--primary);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
}

.upgrade-flow-back:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

.upgrade-flow-title {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
  color: #0f172a;
}

.upgrade-flow-lead {
  margin: 0 0 0.85rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.pro-cert-picker {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  max-height: min(52vh, 420px);
  overflow-y: auto;
  margin: 0 0 1rem;
  padding: 0.15rem 0.1rem;
}

.pro-cert-option {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.pro-cert-option:has(input:checked) {
  border-color: var(--primary);
  background: var(--primary-soft);
}

.pro-cert-option input {
  margin-top: 0.2rem;
  flex-shrink: 0;
}

.pro-cert-option-text {
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.45;
  color: var(--text);
}

.pro-cert-picker-empty {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.payment-method-picker {
  margin: 0.75rem 0 0.85rem;
}

.payment-method-label {
  display: block;
  margin-bottom: 0.45rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text);
}

.payment-method-segmented {
  width: 100%;
  flex-wrap: wrap;
}

.payment-method-segmented .segmented-item {
  flex: 1 1 auto;
  min-width: 5.5rem;
}

.payment-panel {
  margin: 0 0 1rem;
  padding: 0.85rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #f8fafc;
}

.payment-panel-hint {
  margin: 0 0 0.65rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.payment-panel-note {
  margin: 0.5rem 0 0;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.checkout-already-pro {
  display: grid;
  gap: 0.85rem;
  margin: 0.75rem 0 0;
  padding: 1rem 1.05rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-elevated, #f8fafc);
}

.exam-row p.exam-pro-expiry-hint,
.quiz-pro-expiry-notice {
  padding: 0.55rem 0.75rem;
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1.45;
  color: #78350f;
  text-align: center;
  background: #fffbeb;
  border: 1px solid #fcd34d;
  border-radius: 8px;
}

.quiz-pro-expiry-notice {
  box-sizing: border-box;
  width: fit-content;
  max-width: min(100%, 26rem);
  margin: 0.75rem auto 0;
}

.exam-row p.exam-pro-expiry-hint {
  margin: 0.35rem 0 0;
}

.quiz-pro-expiry-notice.hidden,
.exam-row p.exam-pro-expiry-hint.hidden {
  display: none;
}

.exam-row p.exam-pro-expiry-hint {
  grid-column: 1 / -1;
  margin-top: 0.35rem;
}

.pro-expiry-countdown {
  color: #ca8a04;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.checkout-already-pro-text {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.45;
  font-weight: 600;
  color: var(--gcp-green, #34a853);
}

.checkout-already-pro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.checkout-intl-grid {
  display: grid;
  gap: 1rem;
}

.checkout-paypal-wrap {
  position: relative;
  display: grid;
  gap: 0.75rem;
}

.checkout-paypal-card-hint {
  margin: 0.7rem 0 0.7rem;
  padding: 0;
  font-size: 0.8125rem;
  font-weight: 400;
  line-height: 1.45;
  color: #ff1a1a;
  background: transparent;
  border: none;
  border-radius: 0;
}

.checkout-paypal-card-hint.hidden {
  display: none;
}

.checkout-paypal-accordion {
  display: grid;
  gap: 0;
}

.checkout-paypal-card-panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s ease;
  overflow: hidden;
}

.checkout-paypal-card-panel.is-open {
  grid-template-rows: 1fr;
  margin-top: 0.65rem;
}

.checkout-paypal-card-panel > .checkout-paypal-card-block {
  min-height: 0;
  overflow: hidden;
}

.checkout-paypal-card-block {
  display: grid;
  gap: 0.65rem;
}

.checkout-paypal-field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.65rem;
}

.checkout-paypal-field label {
  display: block;
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.checkout-paypal-field-mount {
  min-height: 2.75rem;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: #fff;
}

.checkout-paypal-or {
  margin: 0;
  text-align: center;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.checkout-paypal-mount {
  min-height: 2.75rem;
}

.checkout-paypal-card-btn-mount {
  min-height: 2.75rem;
}

.checkout-paypal-overlay-mount {
  min-height: 2.75rem;
  overflow: visible;
}

.checkout-paypal-overlay-mount:not(.hidden) {
  display: block;
  width: 100%;
}

.checkout-paypal-wrap,
.checkout-intl-grid,
.checkout-paypal-accordion {
  overflow: visible;
}

.bank-transfer-dl {
  margin: 0;
  display: grid;
  gap: 0.55rem;
}

.bank-transfer-dl div {
  display: grid;
  grid-template-columns: minmax(7rem, 38%) 1fr;
  gap: 0.5rem;
  align-items: baseline;
}

.bank-transfer-dl dt {
  margin: 0;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}

.bank-transfer-dl dd {
  margin: 0;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
}

.bank-transfer-dl .bank-note {
  font-size: 0.8125rem;
  font-weight: 600;
  word-break: break-word;
}

@media (max-width: 960px) {
  .pro-plan-grid--catalog {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .pro-plan-grid {
    grid-template-columns: 1fr;
  }

  .bank-transfer-dl div {
    grid-template-columns: 1fr;
  }
}

.upgrade-signin {
  justify-content: center;
  margin: 0.5rem 0 1rem;
}

.upgrade-license-row {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.35rem;
}

.upgrade-license-row input {
  flex: 1;
  min-width: 0;
  padding: 0.45rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
}

.mode-option {
  position: relative;
  overflow: visible;
}

.mode-option:not(.mode-option--locked) .mode-lock-badge {
  display: none;
}

.mode-option.mode-option--locked .mode-lock-badge {
  display: inline-flex;
  position: absolute;
  top: -0.55rem;
  right: 0.25rem;
  left: auto;
  z-index: 3;
  align-items: center;
  gap: 0.15rem;
  padding: 0.14rem 0.42rem 0.12rem;
  font-size: 0.58rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  line-height: 1;
  white-space: nowrap;
  color: #fff;
  background: linear-gradient(180deg, #ffd54f 0%, #ffb300 50%, #ff9800 100%);
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.45);
  box-shadow: 0 2px 6px rgba(180, 83, 9, 0.28);
  pointer-events: none;
}

.mode-lock-badge-icon {
  flex-shrink: 0;
  opacity: 0.95;
}

.mode-hint--premium {
  color: var(--gcp-red);
  font-weight: 500;
}

body.modal-open {
  overflow: hidden;
}

@media (prefers-reduced-motion: reduce) {
  .feature-card,
  .feature-icon {
    transition: none;
  }

  .feature-card:hover {
    transform: none;
    box-shadow: var(--shadow);
    border-color: var(--border);
  }

  .feature-card:hover .feature-icon {
    transform: none;
  }
}

@media (max-width: 960px) {
  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .feature-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }
  .exam-tier-grid {
    grid-template-columns: 1fr;
  }
  .brand-lockup {
    display: none;
  }
}