/* ─── SEO Pages Shared Styles ─────────────────────────
   Matches index.html design system from untangle.bio
   ──────────────────────────────────────────────────── */

/* ─── Tokens (from index.html) ────────────────────── */
:root {
  --ink:     #0e1520;
  --ink-2:   #1a2438;
  --ink-3:   #243048;
  --fg:      #f0f4ff;
  --fg-2:    #b8c8e8;
  --fg-3:    #7a90b8;
  --accent:  #6b8cff;
  --accent-2:#a78bfa;
  --accent-3:#34d399;
  --line:    rgba(255,255,255,0.08);
  --line-2:  rgba(255,255,255,0.14);
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-xl: 32px;
  /* Semantic aliases for SEO page components */
  --green:   #34d399;
  --yellow:  #fbbf24;
  --red:     #f87171;
  --purple:  #a78bfa;
}

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

html { color-scheme: dark; scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--ink);
  color: var(--fg);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  line-height: 1.7;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ─── Animated Background (from index.html) ───────── */
@keyframes bgPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.85; }
}

@keyframes bgDrift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(5%, -4%) scale(1.03); }
  66% { transform: translate(-4%, 6%) scale(0.97); }
}

@keyframes bgDriftAlt {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-5%, 4%) scale(1.02); }
}

.bg-canvas {
  position: fixed;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 1400px 800px at 10% -5%, rgba(107,140,255,0.22) 0%, rgba(107,140,255,0.06) 45%, transparent 65%),
    radial-gradient(ellipse 1100px 700px at 90% 15%, rgba(167,139,250,0.18) 0%, rgba(139,92,246,0.05) 50%, transparent 62%),
    radial-gradient(ellipse 1000px 600px at 50% 95%, rgba(52,211,153,0.14) 0%, rgba(34,197,94,0.04) 45%, transparent 58%),
    radial-gradient(ellipse 800px 500px at 70% 50%, rgba(139,92,246,0.08) 0%, transparent 55%),
    radial-gradient(ellipse 600px 400px at 25% 60%, rgba(52,211,153,0.06) 0%, transparent 50%),
    linear-gradient(180deg, #0a0f1e 0%, #0c1220 25%, #0d1528 50%, #0a0f1e 100%);
  pointer-events: none;
  animation: bgPulse 8s ease-in-out infinite;
}

.bg-canvas::before {
  content: '';
  position: absolute;
  inset: -40%;
  background: radial-gradient(
      ellipse 90% 90% at 75% 25%,
      rgba(167,139,250,0.1) 0%,
      transparent 55%
    ),
    radial-gradient(
      ellipse 70% 70% at 20% 75%,
      rgba(52,211,153,0.08) 0%,
      transparent 50%
    );
  animation: bgDriftAlt 28s ease-in-out infinite;
  pointer-events: none;
}

.bg-canvas::after {
  content: '';
  position: absolute;
  inset: -30%;
  background: radial-gradient(
      ellipse 80% 80% at 20% 30%,
      rgba(107,140,255,0.08) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse 70% 70% at 80% 70%,
      rgba(167,139,250,0.07) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse 60% 60% at 50% 50%,
      rgba(52,211,153,0.05) 0%,
      transparent 55%
    );
  animation: bgDrift 32s ease-in-out infinite;
  pointer-events: none;
}

/* ─── Page wrapper (above bg-canvas) ──────────────── */
.page { position: relative; z-index: 1; }

/* ─── Nav (matches index.html sticky nav) ─────────── */
nav.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px) saturate(1.8);
  -webkit-backdrop-filter: blur(20px) saturate(1.8);
  background: rgba(10,15,30,0.5);
  box-shadow: 0 4px 24px rgba(0,0,0,0.1), 0 1px 0 rgba(107,140,255,0.08) inset;
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* ─── Animated Logo (matches index.html pf-logo) ──── */
.pf-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  cursor: pointer;
  text-decoration: none;
  padding: 6px 4px;
}

.pf-logo:hover { text-decoration: none; }

.pf-logo-icon {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
}

.pf-logo-icon canvas {
  width: 34px;
  height: 34px;
  display: block;
}

.pf-logo-text {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: -0.03em;
  color: #e8e6e1;
  user-select: none;
}

.pf-dot {
  color: #c4f74a;
  font-weight: 500;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4em;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  text-decoration: none;
  border-radius: var(--r-md);
  padding: 0.6rem 1.1rem;
  transition: all 0.18s ease;
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.btn:hover { text-decoration: none; }

.btn-sm { font-size: 0.8125rem; padding: 0.45rem 0.9rem; border-radius: var(--r-sm); }

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #5577ff 100%);
  color: #fff;
  box-shadow: 0 4px 20px rgba(107,140,255,0.32), inset 0 1px 0 rgba(255,255,255,0.15);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 32px rgba(107,140,255,0.5), 0 0 0 1px rgba(107,140,255,0.3), inset 0 1px 0 rgba(255,255,255,0.2);
}

/* Legacy .nav-logo fallback */
.nav-logo {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--fg);
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}

.nav-links a {
  display: block;
  padding: 0.4rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--fg-2);
  border-radius: var(--r-sm);
  transition: color 0.2s, background 0.2s, transform 0.2s;
  position: relative;
}

.nav-links a:hover {
  color: var(--fg);
  background: rgba(107,140,255,0.08);
  transform: translateY(-1px);
  text-decoration: none;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  transition: transform 0.3s;
}

.nav-links a:hover::after {
  transform: translateX(-50%) scaleX(1);
}

/* ─── Hero ────────────────────────────────────────── */
.hero {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 2rem 2rem;
}

.breadcrumb {
  font-size: 0.85rem;
  color: var(--fg-3);
  margin-bottom: 1rem;
}

.breadcrumb a { color: var(--fg-3); }
.breadcrumb a:hover { color: var(--fg); }

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
  color: var(--fg);
}

.hero h1 span {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero .subtitle {
  color: var(--fg-2);
  font-size: 1.1rem;
  line-height: 1.6;
  margin-bottom: 2rem;
  font-weight: 400;
}

/* ─── Content ─────────────────────────────────────── */
.content {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem 4rem;
}

.content-wide {
  max-width: 960px;
}

/* ─── Card ────────────────────────────────────────── */
.card {
  background: rgba(26,36,56,0.6);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line-2);
  border-radius: var(--r-md);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.card h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--fg);
  letter-spacing: -0.02em;
}

.card h3 {
  font-size: 1.05rem;
  margin: 1rem 0 0.5rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* ─── Property Grid ───────────────────────────────── */
.props-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.75rem;
}

.prop {
  background: rgba(14,21,32,0.5);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 1rem;
}

.prop-label {
  font-size: 0.7rem;
  color: var(--fg-3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.25rem;
  font-weight: 500;
}

.prop-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--fg);
}

.prop-unit {
  font-size: 0.85rem;
  color: var(--fg-3);
  font-weight: 400;
}

/* ─── Stats Row ───────────────────────────────────── */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.stat {
  background: rgba(14,21,32,0.5);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 1rem;
  text-align: center;
}

.stat-value { font-size: 1.5rem; font-weight: 700; }
.stat-label { font-size: 0.7rem; color: var(--fg-3); text-transform: uppercase; letter-spacing: 0.06em; font-weight: 500; }

/* ─── Summary Grid ────────────────────────────────── */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 0.75rem;
}

.summary-stat {
  background: rgba(14,21,32,0.5);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 1rem;
  text-align: center;
}

.summary-val { font-size: 1.6rem; font-weight: 800; }
.summary-label { font-size: 0.7rem; color: var(--fg-3); text-transform: uppercase; letter-spacing: 0.06em; }

/* ─── Tables ──────────────────────────────────────── */
table { width: 100%; border-collapse: collapse; margin: 0.5rem 0; }
th, td { text-align: left; padding: 0.6rem 1rem; border-bottom: 1px solid var(--line); font-size: 0.9rem; }
th { color: var(--fg-3); font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; font-weight: 500; }
td { color: var(--fg-2); }

/* ─── Technique Cards ─────────────────────────────── */
.technique-list { display: flex; flex-direction: column; gap: 0.75rem; margin-top: 1rem; }

.technique {
  background: rgba(14,21,32,0.5);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 1.25rem;
  border-left: 3px solid var(--accent);
}

.technique-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.5rem; }
.technique-name { font-weight: 600; font-size: 1.05rem; color: var(--fg); }
.technique-badge { font-size: 0.75rem; padding: 0.2rem 0.6rem; border-radius: 999px; font-weight: 600; }
.badge-best { background: rgba(52,211,153,0.15); color: var(--accent-3); }
.badge-good { background: rgba(251,191,36,0.15); color: var(--yellow); }
.technique p { color: var(--fg-2); font-size: 0.9rem; }

/* ─── VS Comparison ───────────────────────────────── */
.vs-grid { display: grid; grid-template-columns: 1fr auto 1fr; gap: 1rem; align-items: start; margin: 1rem 0; }
.vs-card { background: rgba(14,21,32,0.5); border: 1px solid var(--line); border-radius: var(--r-sm); padding: 1.25rem; }
.vs-card h4 { margin-bottom: 0.75rem; font-size: 1.1rem; font-weight: 600; }
.vs-divider { display: flex; align-items: center; font-size: 1.5rem; font-weight: 800; color: var(--fg-3); padding-top: 2rem; }
.prop-row { display: flex; justify-content: space-between; padding: 0.3rem 0; font-size: 0.9rem; border-bottom: 1px solid var(--line); color: var(--fg-2); }
.prop-row:last-child { border-bottom: none; }
.prop-key { color: var(--fg-3); }

/* ─── Process Steps ───────────────────────────────── */
.step { display: flex; gap: 1rem; margin-bottom: 1.5rem; }
.step-num {
  flex-shrink: 0; width: 40px; height: 40px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #fff; font-weight: 800; font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center; margin-top: 0.15rem;
  box-shadow: 0 4px 12px rgba(107,140,255,0.3);
}
.step-content h3 { color: var(--fg); font-size: 1.1rem; margin-bottom: 0.25rem; }
.step-content p { color: var(--fg-2); font-size: 0.9rem; }
.step-tag {
  display: inline-block; font-size: 0.75rem; padding: 0.15rem 0.5rem;
  border-radius: var(--r-sm); background: rgba(107,140,255,0.1);
  border: 1px solid rgba(107,140,255,0.2); color: var(--accent); margin-top: 0.5rem;
}

/* ─── Result Grid ─────────────────────────────────── */
.result-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.75rem; }
.result { background: rgba(14,21,32,0.5); border: 1px solid var(--line); border-radius: var(--r-sm); padding: 1rem; text-align: center; }
.result-value { font-size: 1.8rem; font-weight: 800; }
.result-label { font-size: 0.7rem; color: var(--fg-3); text-transform: uppercase; letter-spacing: 0.06em; }

/* ─── Pipeline (mAb process) ──────────────────────── */
.pipeline { display: flex; flex-direction: column; gap: 0; }
.pipe-step {
  display: grid; grid-template-columns: 60px 1fr 180px; gap: 1rem;
  align-items: start; padding: 1.5rem;
  background: rgba(14,21,32,0.5);
  border-bottom: 1px solid var(--line);
}
.pipe-step:first-child { border-radius: var(--r-md) var(--r-md) 0 0; }
.pipe-step:last-child { border-radius: 0 0 var(--r-md) var(--r-md); border-bottom: none; }
.pipe-num {
  width: 44px; height: 44px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 1.1rem; color: #fff;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.pipe-info h3 { color: var(--fg); font-size: 1.05rem; margin: 0 0 0.25rem; }
.pipe-info .op-type { font-size: 0.8rem; color: var(--accent); margin-bottom: 0.4rem; font-weight: 500; }
.pipe-info p { color: var(--fg-2); font-size: 0.88rem; margin: 0; }
.pipe-metrics { font-size: 0.85rem; color: var(--fg-3); }
.pipe-metrics .metric { margin-bottom: 0.3rem; }
.pipe-metrics .metric-val { color: var(--fg); font-weight: 600; }

/* ─── Highlight Box ───────────────────────────────── */
.highlight {
  background: rgba(107,140,255,0.08);
  border-left: 3px solid var(--accent);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  margin: 1rem 0;
  font-size: 0.9rem;
  color: var(--fg-2);
}

.highlight strong { color: var(--fg); }

/* ─── FAQ ─────────────────────────────────────────── */
.faq { margin-top: 1rem; }

.faq details {
  background: rgba(14,21,32,0.5);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
  transition: border-color 0.2s;
}

.faq details[open] { border-color: rgba(107,140,255,0.3); }
.faq summary { font-weight: 600; cursor: pointer; color: var(--fg); font-size: 0.95rem; }
.faq summary:hover { color: var(--accent); }
.faq details p { margin-top: 0.75rem; color: var(--fg-2); font-size: 0.9rem; }

/* ─── CTA Box ─────────────────────────────────────── */
.cta-box {
  background: linear-gradient(135deg, rgba(107,140,255,0.15), rgba(167,139,250,0.1));
  border: 1px solid rgba(107,140,255,0.25);
  border-radius: var(--r-lg);
  padding: 2.5rem;
  text-align: center;
  margin-top: 2rem;
}

.cta-box h3 { font-size: 1.3rem; color: var(--fg); margin-bottom: 0.5rem; font-weight: 700; }
.cta-box p { color: var(--fg-2); margin-bottom: 1.25rem; }

.cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4em;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  border: none;
  cursor: pointer;
  text-decoration: none;
  border-radius: var(--r-md);
  padding: 0.85rem 2rem;
  background: linear-gradient(135deg, var(--accent) 0%, #5577ff 100%);
  color: #fff;
  box-shadow: 0 4px 20px rgba(107,140,255,0.32), inset 0 1px 0 rgba(255,255,255,0.15);
  transition: all 0.18s ease;
  letter-spacing: -0.01em;
}

.cta-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 32px rgba(107,140,255,0.5), 0 0 0 1px rgba(107,140,255,0.3), inset 0 1px 0 rgba(255,255,255,0.2);
  text-decoration: none;
}

/* ─── Internal Links ──────────────────────────────── */
.internal-links { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; }

.internal-links a {
  background: rgba(107,140,255,0.08);
  border: 1px solid rgba(107,140,255,0.15);
  padding: 0.35rem 0.75rem;
  border-radius: var(--r-sm);
  font-size: 0.85rem;
  color: var(--fg-2);
  transition: all 0.2s;
}

.internal-links a:hover {
  background: rgba(107,140,255,0.15);
  border-color: rgba(107,140,255,0.35);
  color: var(--fg);
  text-decoration: none;
}

/* ─── Footer ──────────────────────────────────────── */
.footer {
  background: rgba(10,15,30,0.5);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--line);
  padding: 2rem;
  text-align: center;
  color: var(--fg-3);
  font-size: 0.85rem;
  margin-top: 3rem;
}

.footer a { color: var(--fg-3); }
.footer a:hover { color: var(--fg); }

/* ─── Responsive ──────────────────────────────────── */
@media (max-width: 700px) {
  .vs-grid { grid-template-columns: 1fr; }
  .vs-divider { display: none; }
  .result-grid { grid-template-columns: 1fr; }
  .pipe-step { grid-template-columns: 50px 1fr; }
  .pipe-metrics { grid-column: 1 / -1; }
  .props-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
}