/* ═══════════════════════════════════════════════════════════
   WhatPhone — Main Stylesheet
   Aesthetic: Dark Futuristic / Digital Blueprint
   Fonts: Syne (display) + Space Mono (mono) + DM Sans (body)
═══════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=Space+Mono:wght@400;700&family=DM+Sans:wght@300;400;500;600&display=swap');

/* ── Variables ─────────────────────────────────────────── */
:root {
  --bg: #080c14;
  --bg2: #0d1220;
  --bg3: #111827;
  --surface: #141b2d;
  --surface2: #1c2540;
  --border: #1e2d4a;
  --border2: #253356;
  --accent: #3b82f6;
  --accent2: #60a5fa;
  --accent3: #93c5fd;
  --neon: #22d3ee;
  --neon2: #0ea5e9;
  --green: #22c55e;
  --red: #ef4444;
  --amber: #f59e0b;
  --text: #e2e8f0;
  --text2: #94a3b8;
  --text3: #64748b;
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'Space Mono', monospace;
  --r: 12px;
  --r-lg: 20px;
  --shadow: 0 4px 32px rgba(0,0,0,0.4);
  --shadow-accent: 0 0 40px rgba(59,130,246,0.15);
  --glow: 0 0 60px rgba(34,211,238,0.08);
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
}

/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul { list-style: none; }

/* ── Scrollbar ───────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ── Selection ───────────────────────────────────────────── */
::selection { background: rgba(59,130,246,0.3); color: #fff; }

/* ── Skip link ───────────────────────────────────────────── */
.skip-link {
  position: absolute; top: -100%; left: 1rem;
  background: var(--accent); color: #fff; padding: 0.5rem 1rem;
  border-radius: var(--r); font-weight: 600; z-index: 9999;
  transition: top var(--transition);
}
.skip-link:focus { top: 1rem; }

/* ── Layout ───────────────────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
section { padding: 6rem 0; }

/* ══════════════════════════════════════════════════════════
   HEADER
══════════════════════════════════════════════════════════ */
#site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  transition: transform var(--transition), background var(--transition);
}
#site-header.hidden { transform: translateY(-100%); }
.navbar {
  padding: 0 1.5rem;
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), backdrop-filter var(--transition);
}
#site-header.scrolled .navbar {
  background: rgba(8,12,20,0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-color: var(--border);
  box-shadow: 0 1px 40px rgba(0,0,0,0.5);
}
.nav-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 72px; gap: 2rem;
}
.nav-logo {
  display: flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-display); font-weight: 700; font-size: 1.2rem;
  color: var(--text); transition: opacity var(--transition);
}
.nav-logo:hover { opacity: 0.8; }
.logo-icon { color: var(--accent); }
.logo-text .accent { color: var(--accent2); }
.nav-links {
  display: flex; align-items: center; gap: 0.25rem;
  margin-left: auto;
}
.nav-link {
  padding: 0.4rem 0.75rem;
  font-size: 0.9rem; font-weight: 500; color: var(--text2);
  border-radius: 8px; transition: color var(--transition), background var(--transition);
  position: relative;
}
.nav-link:hover, .nav-link.active { color: var(--text); background: var(--surface); }
.nav-link.active::after {
  content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 16px; height: 2px; background: var(--accent); border-radius: 1px;
}
.nav-cta {
  display: flex; align-items: center; gap: 0.4rem;
  margin-left: 0.75rem; padding: 0.5rem 1.1rem;
  background: var(--accent); color: #fff;
  border-radius: 8px; font-size: 0.875rem; font-weight: 600;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 0 20px rgba(59,130,246,0.3);
}
.nav-cta:hover { background: var(--accent2); transform: translateY(-1px); box-shadow: 0 4px 24px rgba(59,130,246,0.5); }
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  width: 36px; height: 36px; align-items: center; justify-content: center;
  border-radius: 8px; transition: background var(--transition);
}
.nav-toggle span {
  width: 20px; height: 2px; background: var(--text2);
  border-radius: 1px; transition: all 0.3s;
}
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* ══════════════════════════════════════════════════════════
   ANIMATIONS
══════════════════════════════════════════════════════════ */
[data-animate] {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-animate].in-view { opacity: 1; transform: translateY(0); }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(32px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; } to { opacity: 1; }
}
@keyframes pulse-ring {
  0% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(59,130,246,0.5); }
  70% { transform: scale(1); box-shadow: 0 0 0 20px rgba(59,130,246,0); }
  100% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(59,130,246,0); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}
@keyframes scan {
  0% { transform: translateY(-100%); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(300%); opacity: 0; }
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0} }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}
@keyframes orbit {
  from { transform: rotate(0deg) translateX(80px) rotate(0deg); }
  to { transform: rotate(360deg) translateX(80px) rotate(-360deg); }
}
@keyframes grid-fade {
  0%,100% { opacity: 0.03; } 50% { opacity: 0.07; }
}

/* ══════════════════════════════════════════════════════════
   HERO
══════════════════════════════════════════════════════════ */
.hero {
  min-height: 100vh;
  display: flex; align-items: center;
  position: relative; overflow: hidden;
  padding-top: 72px;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(59,130,246,0.12) 0%, transparent 70%),
              radial-gradient(ellipse 60% 50% at 80% 80%, rgba(34,211,238,0.06) 0%, transparent 60%),
              var(--bg);
}
.hero-grid {
  position: absolute; inset: 0; z-index: 0;
  background-image: linear-gradient(var(--border) 1px, transparent 1px),
                    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: grid-fade 4s ease-in-out infinite;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 20%, transparent 80%);
}
.hero-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr 1fr;
  align-items: center; gap: 4rem;
  max-width: 1200px; margin: 0 auto; padding: 0 1.5rem;
  width: 100%;
}
.hero-content { animation: fadeInUp 0.8s ease both; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.25);
  border-radius: 100px; font-size: 0.8rem; font-weight: 600;
  color: var(--accent2); letter-spacing: 0.05em; text-transform: uppercase;
  margin-bottom: 1.5rem;
}
.eyebrow-dot { width: 6px; height: 6px; background: var(--accent); border-radius: 50%; animation: blink 2s infinite; }
.hero-title {
  font-family: var(--font-display); font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800; line-height: 1.1; letter-spacing: -0.02em;
  margin-bottom: 1.25rem; color: #fff;
}
.hero-title .highlight {
  background: linear-gradient(135deg, var(--accent2) 0%, var(--neon) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: 1.15rem; color: var(--text2); max-width: 480px;
  margin-bottom: 2rem; line-height: 1.7;
}
.hero-quick-info {
  display: flex; flex-wrap: wrap; gap: 0.6rem; margin-bottom: 2rem;
  opacity: 0; transition: opacity 0.5s ease 0.5s;
}
.hero-quick-info.loaded { opacity: 1; }
.quick-chip {
  display: inline-flex; align-items: center; gap: 0.35rem;
  padding: 0.3rem 0.75rem;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 100px; font-size: 0.8rem; color: var(--text2);
  font-family: var(--font-mono);
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 0.6rem;
  padding: 0.85rem 2rem; border-radius: var(--r);
  background: var(--accent); color: #fff;
  font-size: 1rem; font-weight: 600; font-family: var(--font-display);
  box-shadow: 0 0 30px rgba(59,130,246,0.35);
  transition: all var(--transition); position: relative; overflow: hidden;
}
.btn-primary::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 100%);
  opacity: 0; transition: opacity var(--transition);
}
.btn-primary:hover { background: var(--accent2); transform: translateY(-2px); box-shadow: 0 8px 40px rgba(59,130,246,0.5); }
.btn-primary:hover::before { opacity: 1; }
.btn-primary.loading {
  pointer-events: none;
}
.btn-primary.loading .btn-text { opacity: 0.6; }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.85rem 1.75rem; border-radius: var(--r);
  background: var(--surface); color: var(--text2);
  border: 1px solid var(--border); font-size: 1rem; font-weight: 500;
  transition: all var(--transition);
}
.btn-secondary:hover { background: var(--surface2); color: var(--text); border-color: var(--border2); }
.btn-icon { transition: transform var(--transition); }
.btn-primary:hover .btn-icon { transform: translateX(3px); }

/* Hero Visual */
.hero-visual {
  display: flex; align-items: center; justify-content: center;
  animation: fadeIn 1s ease 0.3s both;
  will-change: transform;
}
.phone-mockup {
  position: relative; width: 200px; height: 380px;
  animation: float 5s ease-in-out infinite;
}
.phone-frame {
  width: 100%; height: 100%;
  background: linear-gradient(145deg, var(--surface2), var(--bg3));
  border-radius: 32px;
  border: 2px solid var(--border2);
  box-shadow: 0 40px 80px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.05) inset,
              var(--shadow-accent), 0 0 60px rgba(34,211,238,0.1);
  position: relative; overflow: hidden;
  display: flex; flex-direction: column; align-items: center;
}
.phone-notch {
  width: 80px; height: 24px; background: var(--bg);
  border-radius: 0 0 16px 16px; margin: 0 auto;
  position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  z-index: 2;
}
.phone-screen {
  flex: 1; width: 100%; padding: 40px 16px 20px;
  display: flex; flex-direction: column; gap: 8px;
  position: relative;
}
.phone-screen-line {
  height: 8px; border-radius: 4px;
  background: linear-gradient(90deg, var(--accent) 0%, transparent 100%);
  opacity: 0.3; animation: shimmer 2.5s linear infinite;
  background-size: 200% auto;
}
.phone-screen-line:nth-child(1) { width: 70%; animation-delay: 0s; }
.phone-screen-line:nth-child(2) { width: 90%; animation-delay: 0.3s; }
.phone-screen-line:nth-child(3) { width: 55%; animation-delay: 0.6s; }
.phone-scan-line {
  position: absolute; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon), transparent);
  animation: scan 2.5s ease-in-out infinite;
  box-shadow: 0 0 12px var(--neon);
}
.phone-home-btn {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--surface2); border: 1px solid var(--border2);
  margin: 12px auto;
}
.orbit-container {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 200px; height: 200px;
  pointer-events: none;
}
.orbit-ring {
  position: absolute; inset: 0; border-radius: 50%;
  border: 1px dashed rgba(59,130,246,0.2);
}
.orbit-dot {
  width: 10px; height: 10px; border-radius: 50%; background: var(--accent);
  position: absolute; top: 50%; left: 50%; margin: -5px;
  animation: orbit 4s linear infinite;
  box-shadow: 0 0 12px var(--accent);
}
.orbit-dot:nth-child(3) {
  background: var(--neon);
  animation-duration: 6s; animation-direction: reverse;
  box-shadow: 0 0 12px var(--neon);
}
.orbit-dot:nth-child(4) {
  background: var(--amber);
  animation-duration: 8s;
  box-shadow: 0 0 12px var(--amber);
}
.info-tags {
  position: absolute; right: -60px; top: 20%;
  display: flex; flex-direction: column; gap: 8px;
}
.info-tag {
  background: var(--surface); border: 1px solid var(--border);
  padding: 5px 10px; border-radius: 8px;
  font-size: 0.65rem; font-family: var(--font-mono); color: var(--accent2);
  white-space: nowrap; animation: fadeIn 0.5s ease both;
}
.info-tag:nth-child(1) { animation-delay: 1s; }
.info-tag:nth-child(2) { animation-delay: 1.3s; }
.info-tag:nth-child(3) { animation-delay: 1.6s; }

/* Loader */
#detectLoader {
  position: fixed; inset: 0; z-index: 9998;
  display: flex; align-items: center; justify-content: center;
  background: rgba(8,12,20,0.9); backdrop-filter: blur(10px);
  opacity: 0; pointer-events: none; transition: opacity var(--transition);
}
#detectLoader.active { opacity: 1; pointer-events: auto; }
.loader-inner { text-align: center; }
.loader-spinner {
  width: 56px; height: 56px; border-radius: 50%;
  border: 3px solid var(--surface2); border-top-color: var(--accent);
  animation: spin 0.8s linear infinite; margin: 0 auto 1rem;
}
.loader-text { font-family: var(--font-mono); color: var(--accent2); font-size: 0.9rem; }

/* ══════════════════════════════════════════════════════════
   STATS SECTION
══════════════════════════════════════════════════════════ */
.stats-section {
  padding: 4rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg2);
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem;
}
.stat-item { text-align: center; }
.stat-number {
  font-family: var(--font-display); font-size: 2.5rem; font-weight: 800;
  color: #fff; line-height: 1;
  background: linear-gradient(135deg, var(--accent2), var(--neon));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-suffix { color: var(--accent2); font-family: var(--font-display); font-size: 2rem; font-weight: 800; }
.stat-label { color: var(--text2); font-size: 0.9rem; margin-top: 0.25rem; }

/* ══════════════════════════════════════════════════════════
   DETECT SECTION
══════════════════════════════════════════════════════════ */
.detect-section { background: var(--bg); }
.section-header { text-align: center; margin-bottom: 3.5rem; }
.section-eyebrow {
  display: inline-block; margin-bottom: 0.75rem;
  font-size: 0.75rem; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--accent2); font-family: var(--font-mono);
}
.section-title {
  font-family: var(--font-display); font-size: clamp(1.8rem, 3vw, 2.75rem);
  font-weight: 800; color: #fff; margin-bottom: 0.75rem; line-height: 1.2;
}
.section-subtitle { font-size: 1.05rem; color: var(--text2); max-width: 540px; margin: 0 auto; }

#resultSection {
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
  pointer-events: none;
}
#resultSection.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }

.result-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; margin-top: 2rem; }

/* Device Card */
.device-card-header {
  background: linear-gradient(145deg, var(--surface), var(--surface2));
  border: 1px solid var(--border); border-radius: var(--r-lg);
  padding: 2rem;
  position: relative; overflow: hidden;
}
.device-card-header::before {
  content: ''; position: absolute; top: -1px; left: 0; right: 0; height: 3px;
  background: var(--brand-color, var(--accent));
}
.device-brand-badge {
  display: inline-block; padding: 0.25rem 0.75rem;
  background: rgba(255,255,255,0.06); border: 1px solid var(--border2);
  border-radius: 100px; font-size: 0.75rem; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--text2);
  margin-bottom: 0.5rem;
}
.device-model-name {
  font-family: var(--font-display); font-size: 1.6rem; font-weight: 800;
  color: #fff; margin-bottom: 0.75rem;
}
.device-type-tag {
  display: inline-flex; align-items: center; gap: 0.4rem;
  color: var(--text2); font-size: 0.85rem;
}
.device-battery {
  display: flex; align-items: center; gap: 0.75rem; margin-top: 1rem;
}
.battery-bar {
  flex: 1; height: 8px; background: var(--surface2); border-radius: 4px; overflow: hidden;
}
.battery-fill { height: 100%; border-radius: 4px; transition: width 1s ease; }
.charging-icon { font-size: 1rem; }
.device-card-body {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 1.5rem; grid-column: 1/-1;
}
.card-info-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem;
  margin-bottom: 1.5rem;
}
.info-cell { padding: 0.75rem; background: var(--bg3); border-radius: 10px; }
.info-label { display: block; font-size: 0.7rem; color: var(--text3); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 0.25rem; }
.info-value { font-family: var(--font-mono); font-size: 0.85rem; color: var(--text); font-weight: 700; word-break: break-all; }
.card-actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.action-btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.55rem 1.1rem; border-radius: 8px;
  background: var(--bg3); border: 1px solid var(--border);
  color: var(--text2); font-size: 0.85rem; font-weight: 500;
  transition: all var(--transition);
}
.action-btn:hover { background: var(--surface2); color: var(--text); border-color: var(--accent); }

/* Tabs */
.tabs-nav {
  display: flex; gap: 0.25rem; padding: 0.5rem;
  background: var(--bg3); border-radius: 12px; margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.tab-btn {
  flex: 1; min-width: 100px;
  padding: 0.55rem 1rem; border-radius: 8px;
  font-size: 0.85rem; font-weight: 600; color: var(--text2);
  transition: all var(--transition); display: flex; align-items: center; justify-content: center; gap: 0.4rem;
}
.tab-btn.active { background: var(--surface2); color: var(--text); }
.tab-btn:hover:not(.active) { color: var(--text); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.specs-dl { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.5rem; }
.spec-row { display: flex; justify-content: space-between; align-items: center; padding: 0.6rem 0.75rem; background: var(--bg3); border-radius: 8px; }
.spec-row dt { font-size: 0.8rem; color: var(--text2); }
.spec-row dd { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text); font-weight: 700; text-align: right; word-break: break-all; }

/* Capabilities Grid */
.cap-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 0.75rem;
}
.cap-card {
  padding: 1rem; background: var(--surface); border: 1px solid var(--border);
  border-radius: 12px; text-align: center; transition: all var(--transition);
}
.cap-card:hover { border-color: var(--border2); transform: translateY(-2px); }
.cap-card.supported { border-color: rgba(34,197,94,0.25); }
.cap-card.unsupported { opacity: 0.6; }
.cap-dot {
  width: 10px; height: 10px; border-radius: 50%; display: inline-block; margin-bottom: 0.5rem;
}
.cap-card.supported .cap-dot { background: var(--green); box-shadow: 0 0 8px rgba(34,197,94,0.5); }
.cap-card.unsupported .cap-dot { background: var(--text3); }
.cap-name { font-size: 0.8rem; font-weight: 600; color: var(--text); margin-bottom: 0.25rem; }
.cap-val { font-size: 0.7rem; color: var(--text2); font-family: var(--font-mono); word-break: break-all; }

/* Advanced Info */
.advanced-block {
  background: var(--bg3); border: 1px solid var(--border); border-radius: 12px;
  padding: 1rem 1.25rem; margin-bottom: 0.75rem;
}
.advanced-block h4 { font-size: 0.8rem; color: var(--text3); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 0.5rem; }
.ua-string {
  font-family: var(--font-mono); font-size: 0.75rem; color: var(--accent2);
  word-break: break-all; display: block; margin-bottom: 0.5rem;
}
code { font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent2); }
.copy-btn {
  padding: 0.3rem 0.7rem; background: var(--surface2); border: 1px solid var(--border);
  border-radius: 6px; font-size: 0.75rem; color: var(--text2); transition: all var(--transition);
}
.copy-btn:hover { color: var(--text); border-color: var(--accent); }

/* ══════════════════════════════════════════════════════════
   FEATURES SECTION
══════════════════════════════════════════════════════════ */
.features-section { background: var(--bg2); }
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem;
}
.feature-card {
  padding: 2rem; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); transition: all var(--transition);
  position: relative; overflow: hidden;
}
.feature-card::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(59,130,246,0.05) 0%, transparent 60%);
  opacity: 0; transition: opacity var(--transition);
}
.feature-card:hover { border-color: var(--border2); transform: translateY(-4px); box-shadow: var(--shadow-accent); }
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.2);
  display: flex; align-items: center; justify-content: center; margin-bottom: 1.25rem;
  font-size: 1.4rem;
  transition: all var(--transition);
}
.feature-card:hover .feature-icon { background: rgba(59,130,246,0.2); transform: scale(1.1); }
.feature-title { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; color: #fff; margin-bottom: 0.5rem; }
.feature-desc { font-size: 0.9rem; color: var(--text2); line-height: 1.65; }

/* ══════════════════════════════════════════════════════════
   HOW IT WORKS
══════════════════════════════════════════════════════════ */
.how-section { background: var(--bg); }
.steps-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem;
  position: relative;
}
.steps-grid::before {
  content: ''; position: absolute; top: 36px; left: 12.5%; right: 12.5%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--border2), var(--accent), var(--border2), transparent);
  z-index: 0;
}
.step-item { text-align: center; position: relative; z-index: 1; }
.step-num {
  width: 72px; height: 72px; border-radius: 50%;
  background: var(--surface); border: 2px solid var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 1.3rem; font-weight: 800; color: var(--accent);
  margin: 0 auto 1.25rem; position: relative;
  box-shadow: 0 0 20px rgba(59,130,246,0.2);
  transition: all var(--transition);
}
.step-item:hover .step-num {
  background: var(--accent); color: #fff; box-shadow: 0 0 30px rgba(59,130,246,0.5);
}
.step-title { font-family: var(--font-display); font-weight: 700; color: #fff; margin-bottom: 0.5rem; }
.step-desc { font-size: 0.875rem; color: var(--text2); line-height: 1.6; }

/* ══════════════════════════════════════════════════════════
   SPECS PREVIEW SECTION
══════════════════════════════════════════════════════════ */
.specs-preview-section { background: var(--bg2); }
.specs-preview-inner {
  display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center;
}
.specs-visual {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); padding: 1.5rem; overflow: hidden;
}
.spec-line {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.75rem 0; border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}
.spec-line:last-child { border-bottom: none; }
.spec-line-key { color: var(--text2); }
.spec-line-bar-wrap { flex: 1; margin: 0 1rem; background: var(--bg3); border-radius: 4px; height: 4px; overflow: hidden; }
.spec-line-bar { height: 100%; background: linear-gradient(90deg, var(--accent), var(--neon)); border-radius: 4px; }
.spec-line-val { color: var(--accent2); font-family: var(--font-mono); font-size: 0.8rem; font-weight: 700; white-space: nowrap; }
.specs-text h2 { font-family: var(--font-display); font-size: 2rem; font-weight: 800; color: #fff; margin-bottom: 1rem; line-height: 1.2; }
.specs-text p { color: var(--text2); margin-bottom: 1.5rem; line-height: 1.7; }
.specs-bullets { display: flex; flex-direction: column; gap: 0.75rem; }
.spec-bullet {
  display: flex; align-items: flex-start; gap: 0.75rem; font-size: 0.9rem; color: var(--text2);
}
.bullet-dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
  flex-shrink: 0; margin-top: 0.4rem;
  box-shadow: 0 0 8px rgba(59,130,246,0.5);
}

/* ══════════════════════════════════════════════════════════
   COMPARE SECTION
══════════════════════════════════════════════════════════ */
.compare-section { background: var(--bg); }
.compare-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.compare-card {
  padding: 1.75rem; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); transition: all var(--transition);
}
.compare-card:hover { border-color: var(--accent); transform: translateY(-4px); box-shadow: var(--shadow-accent); }
.compare-card-icon { font-size: 2rem; margin-bottom: 1rem; }
.compare-card-title { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; color: #fff; margin-bottom: 0.25rem; }
.compare-card-sub { font-size: 0.85rem; color: var(--text3); margin-bottom: 1rem; }
.compare-list { display: flex; flex-direction: column; gap: 0.5rem; }
.compare-item {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.85rem; color: var(--text2);
}
.compare-item::before { content: '→'; color: var(--accent); font-size: 0.75rem; }

/* ══════════════════════════════════════════════════════════
   COMPATIBILITY
══════════════════════════════════════════════════════════ */
.compat-section { background: var(--bg2); }
.compat-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1rem; }
.compat-card {
  padding: 1.5rem 1rem; text-align: center;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-lg); transition: all var(--transition);
}
.compat-card:hover { border-color: var(--accent); transform: translateY(-3px); }
.compat-logo { font-size: 2.5rem; margin-bottom: 0.75rem; }
.compat-name { font-weight: 700; color: #fff; font-size: 0.95rem; margin-bottom: 0.25rem; }
.compat-desc { font-size: 0.78rem; color: var(--text2); }
.compat-status { display: inline-block; margin-top: 0.5rem; padding: 0.2rem 0.6rem; border-radius: 100px; font-size: 0.7rem; font-weight: 700; background: rgba(34,197,94,0.1); color: var(--green); border: 1px solid rgba(34,197,94,0.2); }

/* ══════════════════════════════════════════════════════════
   FAQ
══════════════════════════════════════════════════════════ */
.faq-section { background: var(--bg); }
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 0.75rem; }
.faq-item {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r); overflow: hidden; transition: border-color var(--transition);
}
.faq-item.open { border-color: var(--accent); }
.faq-q {
  width: 100%; padding: 1.25rem 1.5rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  text-align: left; font-weight: 600; color: #fff; font-size: 0.95rem;
  transition: color var(--transition);
}
.faq-q:hover { color: var(--accent2); }
.faq-icon {
  width: 24px; height: 24px; border-radius: 6px; background: var(--surface2);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; font-size: 1rem; font-weight: 300;
  transition: all var(--transition);
}
.faq-item.open .faq-icon { background: var(--accent); transform: rotate(45deg); }
.faq-a {
  max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.35s ease;
  font-size: 0.9rem; color: var(--text2); line-height: 1.7;
}
.faq-item.open .faq-a { max-height: 300px; padding: 0 1.5rem 1.25rem; }

/* ══════════════════════════════════════════════════════════
   CTA SECTION
══════════════════════════════════════════════════════════ */
.cta-section {
  background: var(--bg2);
  padding: 8rem 0;
  text-align: center;
  position: relative; overflow: hidden;
}
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 80% at 50% 50%, rgba(59,130,246,0.1) 0%, transparent 70%);
  pointer-events: none;
}
.cta-title {
  font-family: var(--font-display); font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800; color: #fff; margin-bottom: 1rem; line-height: 1.15;
}
.cta-sub { font-size: 1.1rem; color: var(--text2); max-width: 500px; margin: 0 auto 2rem; }
.cta-badge {
  display: inline-flex; align-items: center; gap: 0.4rem;
  margin-top: 1.5rem; font-size: 0.8rem; color: var(--text2);
}
.cta-badge svg { color: var(--accent); }

/* ══════════════════════════════════════════════════════════
   FOOTER
══════════════════════════════════════════════════════════ */
#site-footer {
  background: var(--bg); border-top: 1px solid var(--border);
  position: relative; overflow: hidden;
}
.footer-glow {
  position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: 600px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
.footer-inner { max-width: 1200px; margin: 0 auto; padding: 4rem 1.5rem 2rem; }
.footer-top { display: grid; grid-template-columns: 1.5fr 2fr; gap: 4rem; margin-bottom: 3rem; }
.footer-logo {
  display: flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-display); font-size: 1.1rem; font-weight: 700;
  color: var(--text); margin-bottom: 1rem;
}
.footer-logo strong { color: var(--accent2); }
.footer-tagline { font-size: 0.9rem; color: var(--text2); line-height: 1.65; margin-bottom: 1rem; }
.footer-badges { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.badge {
  display: inline-flex; align-items: center; gap: 0.35rem;
  padding: 0.25rem 0.6rem; border-radius: 6px;
  background: var(--surface); border: 1px solid var(--border);
  font-size: 0.72rem; color: var(--text2);
}
.footer-nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.footer-col-title { font-family: var(--font-display); font-weight: 700; color: #fff; font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 1rem; }
.footer-col ul { display: flex; flex-direction: column; gap: 0.6rem; }
.footer-col a { font-size: 0.875rem; color: var(--text2); transition: color var(--transition); }
.footer-col a:hover { color: var(--accent2); }
.footer-bottom {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem;
  padding-top: 2rem; border-top: 1px solid var(--border);
  font-size: 0.8rem; color: var(--text3);
}

/* ══════════════════════════════════════════════════════════
   TOAST
══════════════════════════════════════════════════════════ */
.toast {
  position: fixed; bottom: 2rem; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--surface2); border: 1px solid var(--border2);
  padding: 0.75rem 1.5rem; border-radius: 100px;
  font-size: 0.9rem; color: var(--text); z-index: 9999;
  opacity: 0; transition: all 0.3s ease;
  box-shadow: var(--shadow);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ══════════════════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid::before { display: none; }
  .specs-preview-inner { grid-template-columns: 1fr; }
  .compare-grid { grid-template-columns: repeat(2, 1fr); }
  .compat-grid { grid-template-columns: repeat(3, 1fr); }
  .result-grid { grid-template-columns: 1fr; }
  .card-info-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  section { padding: 4rem 0; }
  .hero-inner { grid-template-columns: 1fr; text-align: center; gap: 3rem; }
  .hero-subtitle { margin: 0 auto 2rem; }
  .hero-actions { justify-content: center; }
  .hero-quick-info { justify-content: center; }
  .hero-visual { order: -1; }
  .info-tags { display: none; }
  .nav-links {
    display: none; position: fixed; top: 72px; left: 0; right: 0;
    background: rgba(8,12,20,0.97); backdrop-filter: blur(20px);
    flex-direction: column; padding: 1.5rem; gap: 0.5rem;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .features-grid { grid-template-columns: 1fr; }
  .compare-grid { grid-template-columns: 1fr; }
  .compat-grid { grid-template-columns: repeat(2, 1fr); }
  .card-info-grid { grid-template-columns: repeat(2, 1fr); }
  .specs-dl { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; gap: 2rem; }
  .footer-nav { grid-template-columns: repeat(2, 1fr); }
  .footer-bottom { flex-direction: column; text-align: center; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .compat-grid { grid-template-columns: repeat(2, 1fr); }
  .card-info-grid { grid-template-columns: 1fr 1fr; }
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: 1fr; }
  .footer-nav { grid-template-columns: 1fr; }
}

/* Focus styles for accessibility */
:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 3px;
  border-radius: 4px;
}