/* ═══════════════════════════════════════════════════
   SEO PAGES — Shared Design System
   Consistent with landing.html design tokens
   ═══════════════════════════════════════════════════ */

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #09090b;
  --surface: #0f0f12;
  --surface-2: #16161a;
  --surface-3: #1c1c21;
  --border: rgba(255, 255, 255, 0.08);
  --border-2: rgba(255, 255, 255, 0.14);
  --text: #ededef;
  --text-2: #9CA3AF;
  --text-3: #717888;
  --primary: #3d6bea;
  --primary-dim: rgba(61, 107, 234, 0.12);
  --green: #34d399;
  --green-dim: rgba(52, 211, 153, 0.1);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--surface-3) transparent;
  overflow-x: clip;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
  overflow-x: clip;
  text-rendering: optimizeLegibility;
}

a {
  text-decoration: none;
  color: inherit;
}

/* Selection */
::selection { background: rgba(61, 107, 234, 0.4); color: #fff; }
::-moz-selection { background: rgba(61, 107, 234, 0.4); color: #fff; }

/* Focus */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 6px;
}

/* Subtle grain overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.012;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px;
}

/* ── Layout ── */
.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 28px;
}

/* ── Nav ── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  overflow-x: clip;
  transition: padding 0.5s var(--ease);
}

nav .inner {
  max-width: 1080px;
  width: 100%;
  margin: 0 auto;
  padding: 0 16px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  /* Liquid glass */
  background: rgba(9, 9, 11, 0.58);
  backdrop-filter: blur(12px) saturate(1.2);
  -webkit-backdrop-filter: blur(12px) saturate(1.2);
  border-radius: 14px;
  box-shadow: inset 0 1px 1px rgba(255, 255, 255, 0.07);
  position: relative;
  overflow: hidden;
  transition: background 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

nav .inner::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(180deg,
    rgba(255, 255, 255, 0.18) 0%, rgba(255, 255, 255, 0.06) 25%,
    rgba(255, 255, 255, 0) 50%,
    rgba(255, 255, 255, 0.06) 80%, rgba(255, 255, 255, 0.18) 100%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  z-index: 0;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 0.96rem;
  letter-spacing: -0.01em;
}

.logo-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  overflow: hidden;
  flex-shrink: 0;
}

.logo-icon svg,
.logo-icon img { width: 100%; height: 100%; display: block; object-fit: cover; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav-links a {
  color: var(--text-2);
  font-size: 0.84rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: color 0.2s var(--ease);
}

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

.nav-cta {
  color: var(--text) !important;
  border: 1px solid var(--border-2);
  border-radius: 999px;
  padding: 8px 14px !important;
  background: rgba(255, 255, 255, 0.04);
  font-size: 0.84rem !important;
  font-weight: 600 !important;
  transition: border-color 0.25s, background 0.25s, transform 0.2s;
}

.nav-cta:hover {
  border-color: rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.07);
  transform: translateY(-1px);
}

/* ── Mobile nav (no-JS, native <details>/<summary>) ── */
.seo-mob-menu {
  display: none;
  position: relative;
}

.seo-mob-toggle {
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  color: var(--text);
  cursor: pointer;
  list-style: none;
  transition: background-color 0.2s var(--ease);
}

.seo-mob-toggle:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

.seo-mob-toggle::-webkit-details-marker { display: none; }
.seo-mob-toggle::marker { content: ''; }

.seo-mob-toggle svg { width: 20px; height: 20px; }

.seo-mob-toggle svg line {
  transform-origin: center;
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}

.seo-mob-menu[open] .seo-mob-toggle svg line:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.seo-mob-menu[open] .seo-mob-toggle svg line:nth-child(2) {
  opacity: 0;
}

.seo-mob-menu[open] .seo-mob-toggle svg line:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

.seo-mob-panel {
  position: fixed;
  top: 72px;
  left: 16px;
  right: 16px;
  z-index: 99;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px;
  background: rgba(15, 15, 18, 0.96);
  backdrop-filter: blur(14px) saturate(1.2);
  -webkit-backdrop-filter: blur(14px) saturate(1.2);
  border: 1px solid var(--border-2);
  border-radius: 14px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
}

.seo-mob-panel a {
  padding: 12px 10px;
  border-radius: 8px;
  color: var(--text-2);
  font-size: 0.92rem;
  font-weight: 500;
}

.seo-mob-panel a:hover { background: rgba(255, 255, 255, 0.05); color: var(--text); }

.seo-mob-panel .nav-cta {
  text-align: center;
  margin-top: 6px;
}

/* ── Page Header ── */
.seo-header {
  padding: 120px 0 72px;
  position: relative;
  overflow: hidden;
}

.seo-header::before {
  content: '';
  position: absolute;
  top: -100px;
  left: 50%;
  translate: -50% 0;
  width: 900px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(61, 107, 234, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.seo-eyebrow {
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-3);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.seo-eyebrow::before {
  content: '';
  display: inline-block;
  width: 16px;
  height: 1px;
  background: var(--primary);
  opacity: 0.6;
}

.seo-header h1 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1.1;
  margin-bottom: 20px;
  max-width: 700px;
}

.seo-header h1 em {
  font-family: 'Instrument Serif', Georgia, serif;
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--primary) 0%, #7aa2ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.seo-header .lead {
  font-size: 1rem;
  color: var(--text-2);
  line-height: 1.7;
  max-width: 560px;
  margin-bottom: 36px;
}

/* ── CTA Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 500;
  padding: 11px 22px;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s var(--ease);
  text-decoration: none;
}

.btn-primary {
  background: #fff;
  color: #09090b;
  box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 0 24px rgba(255,255,255,0.08);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(255,255,255,0.12), 0 0 32px rgba(255,255,255,0.1);
}

.btn-primary:active { transform: translateY(0) scale(0.98); }

.btn-ghost {
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--border-2);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.04);
  transform: translateY(-1px);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

/* ── Content Cards Grid ── */
.seo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 60px;
}

.seo-card {
  background: var(--bg);
  padding: 28px 26px;
  transition: background 0.3s var(--ease);
  position: relative;
}

.seo-card:hover { background: var(--surface); }

.seo-card-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  border: 1px solid var(--border);
  background: var(--surface-2);
}

.seo-card-icon svg {
  width: 16px;
  height: 16px;
  color: var(--primary);
}

.seo-card:nth-child(1) .seo-card-icon { background: rgba(61,107,234,0.08); border-color: rgba(61,107,234,0.14); }
.seo-card:nth-child(1) .seo-card-icon svg { color: #3d6bea; }
.seo-card:nth-child(2) .seo-card-icon { background: rgba(52,211,153,0.08); border-color: rgba(52,211,153,0.14); }
.seo-card:nth-child(2) .seo-card-icon svg { color: #34d399; }
.seo-card:nth-child(3) .seo-card-icon { background: rgba(251,191,36,0.08); border-color: rgba(251,191,36,0.14); }
.seo-card:nth-child(3) .seo-card-icon svg { color: #fbbf24; }
.seo-card:nth-child(4) .seo-card-icon { background: rgba(244,114,182,0.08); border-color: rgba(244,114,182,0.14); }
.seo-card:nth-child(4) .seo-card-icon svg { color: #f472b6; }

.seo-card h2 {
  font-size: 0.94rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
  color: var(--text);
}

.seo-card p {
  font-size: 0.84rem;
  color: var(--text-2);
  line-height: 1.6;
  margin: 0;
}

/* ── Info Panel ── */
.seo-panel {
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: 14px;
  padding: 28px 28px;
  margin-bottom: 48px;
}

.seo-panel h2 {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
  color: var(--text);
}

.seo-panel p {
  font-size: 0.88rem;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 12px;
}

.seo-panel p:last-child { margin-bottom: 0; }

.seo-panel ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.seo-panel ul li {
  font-size: 0.88rem;
  color: var(--text-2);
  line-height: 1.6;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.seo-panel ul li::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--green);
  flex-shrink: 0;
  margin-top: 7px;
}

/* ── Comparison Table ── */
.seo-compare {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: 14px;
  overflow: hidden;
  margin-bottom: 48px;
  font-size: 0.86rem;
}

.seo-compare caption {
  caption-side: top;
  text-align: left;
  padding: 20px 20px 4px;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
}

.seo-compare th,
.seo-compare td {
  padding: 14px 20px;
  text-align: left;
  border-top: 1px solid var(--border);
  color: var(--text-2);
  vertical-align: top;
}

.seo-compare thead th {
  border-top: none;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
  font-weight: 600;
  padding-top: 20px;
}

.seo-compare tbody th {
  color: var(--text);
  font-weight: 500;
  white-space: nowrap;
}

.seo-compare td.seo-compare-win {
  color: var(--text);
  font-weight: 500;
}

.seo-compare td.seo-compare-win::before {
  content: '✓ ';
  color: var(--green);
}

.seo-compare-note {
  font-size: 0.78rem;
  color: var(--text-3);
  margin-bottom: 48px;
  line-height: 1.6;
}

.seo-compare-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: 14px;
  margin-bottom: 48px;
}

.seo-compare-wrap .seo-compare {
  margin-bottom: 0;
}

@media (max-width: 640px) {
  .seo-compare { font-size: 0.8rem; }
  .seo-compare th, .seo-compare td { padding: 10px 12px; }

  .seo-compare-wrap {
    margin: 0 -16px 48px;
    padding: 0 16px;
    -webkit-mask-image: linear-gradient(to right, transparent, black 16px, black calc(100% - 16px), transparent);
    mask-image: linear-gradient(to right, transparent, black 16px, black calc(100% - 16px), transparent);
  }

  .seo-compare-wrap .seo-compare {
    min-width: 560px;
  }
}

/* ── FAQ Section ── */
.seo-faq {
  margin-bottom: 48px;
}

.seo-faq h2 {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--text);
}

.faq-item {
  border-top: 1px solid var(--border);
  padding: 18px 0;
}

.faq-item:last-child { border-bottom: 1px solid var(--border); }

.faq-item strong {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.faq-item p {
  font-size: 0.84rem;
  color: var(--text-2);
  line-height: 1.65;
  margin: 0;
}

/* ── Internal Links ── */
.seo-related {
  margin-bottom: 80px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.seo-related-label {
  font-size: 0.7rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-3);
  margin-bottom: 14px;
}

.seo-related-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.seo-related-link {
  font-size: 0.8rem;
  color: var(--text-2);
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255,255,255,0.02);
  transition: all 0.2s var(--ease);
}

.seo-related-link:hover {
  color: var(--text);
  border-color: var(--border-2);
  background: rgba(255,255,255,0.05);
}

/* ── Footer ── */
footer {
  padding: 48px 0;
  background: rgba(15, 15, 18, 0.4);
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-2);
}

.fl-icon {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  overflow: hidden;
}

.fl-icon svg { width: 100%; height: 100%; display: block; }

.footer-sep {
  width: 1px;
  height: 14px;
  background: var(--border);
}

.footer-copy {
  font-size: 0.78rem;
  color: var(--text-3);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  justify-content: flex-end;
}

.footer-links a {
  font-size: 0.78rem;
  color: var(--text-3);
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--text); }

/* ── Responsive ── */
@media (max-width: 768px) {
  .seo-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }

  nav .nav-links {
    display: none;
  }

  .seo-mob-menu {
    display: block;
  }

  .seo-mob-toggle {
    display: flex;
  }

  nav {
    padding: 10px 12px;
  }
}

@media (min-width: 769px) {
  .seo-mob-menu,
  .seo-mob-toggle {
    display: none !important;
  }
}

@media (max-width: 640px) {
  .container { padding: 0 16px; }
  nav .inner { padding: 0 16px; }

  .seo-header {
    padding: 92px 0 52px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    justify-content: center;
    min-height: 46px;
  }

  body::before { display: none; }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal[data-d="1"] { transition-delay: 0.06s; }
.reveal[data-d="2"] { transition-delay: 0.12s; }
.reveal[data-d="3"] { transition-delay: 0.18s; }
.reveal[data-d="4"] { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}