/* ===== DESIGN TOKENS ===== */
:root {
  /* Core palette — deep navy to near-black with purple undertone */
  --bg-primary: #060a13;
  --bg-secondary: #0b1022;
  --bg-card: rgba(15, 22, 40, 0.55);
  --bg-card-hover: rgba(22, 32, 56, 0.65);
  --text-primary: #e8ecf4;
  --text-secondary: #8b95a8;
  --text-muted: #5a6478;

  /* Accent — electric teal with richer glow */
  --accent: #00e4b8;
  --accent-dim: rgba(0, 228, 184, 0.12);
  --accent-glow: rgba(0, 228, 184, 0.06);
  --accent-bright: #33ffd2;

  /* Glass-morphism tokens */
  --glass-bg: rgba(12, 18, 35, 0.55);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: 16px;
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
  --glass-highlight: inset 0 1px 0 rgba(255, 255, 255, 0.05);

  /* Borders */
  --border: rgba(255, 255, 255, 0.06);
  --border-light: rgba(255, 255, 255, 0.12);

  /* Typography */
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* Radii */
  --radius: 16px;
  --radius-sm: 10px;

  /* Gradients */
  --gradient-accent: linear-gradient(135deg, #00e4b8 0%, #00b4d8 50%, #0077b6 100%);
  --gradient-card-border: linear-gradient(135deg, rgba(0, 228, 184, 0.2), rgba(0, 180, 216, 0.05), rgba(255, 255, 255, 0.05));
  --gradient-hero: radial-gradient(ellipse at 30% 20%, rgba(0, 228, 184, 0.08) 0%, transparent 50%),
                    radial-gradient(ellipse at 70% 80%, rgba(0, 119, 182, 0.06) 0%, transparent 50%);
  --gradient-body: linear-gradient(180deg, #060a13 0%, #0a0f1f 30%, #08101e 60%, #060a13 100%);

  /* Transitions */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.2s var(--ease-out-expo);
  --transition-medium: 0.35s var(--ease-out-expo);
  --transition-slow: 0.5s var(--ease-out-expo);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  background: var(--gradient-body);
  background-attachment: fixed;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Mesh gradient overlay — ambient floating orbs */
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background:
    radial-gradient(600px circle at 20% 30%, rgba(0, 228, 184, 0.04) 0%, transparent 60%),
    radial-gradient(800px circle at 80% 60%, rgba(0, 119, 182, 0.03) 0%, transparent 60%),
    radial-gradient(400px circle at 50% 90%, rgba(100, 80, 200, 0.025) 0%, transparent 60%);
  pointer-events: none;
  z-index: 0;
}

/* ===== GLASS CARD MIXIN (via class) ===== */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow), var(--glass-highlight);
}

/* ===== KEYFRAME ANIMATIONS ===== */
@keyframes float-glow {
  0%, 100% { opacity: 0.5; transform: translateX(-50%) scale(1); }
  50% { opacity: 0.8; transform: translateX(-50%) scale(1.05); }
}

@keyframes shimmer-border {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

@keyframes pulse-soft {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

@keyframes fade-up {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slide-in-left {
  from { opacity: 0; transform: translateX(-20px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes gradient-shift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ===== SCROLL-REVEAL (applied by JS) ===== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease-out-expo), transform 0.7s var(--ease-out-expo);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ===== HERO ===== */
.hero {
  position: relative;
  padding: 140px 24px 120px;
  text-align: center;
  overflow: hidden;
}

.hero-inner {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-block;
  padding: 6px 18px;
  background: var(--accent-dim);
  border: 1px solid rgba(0, 228, 184, 0.2);
  border-radius: 100px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 32px;
  animation: fade-up 0.8s var(--ease-out-expo) both;
  position: relative;
  overflow: hidden;
}

/* Shimmer sweep on badge */
.hero-badge::after {
  content: '';
  position: absolute;
  top: 0; left: -100%; width: 200%; height: 100%;
  background: linear-gradient(90deg, transparent 40%, rgba(0, 228, 184, 0.15) 50%, transparent 60%);
  animation: shimmer-border 3s ease-in-out infinite;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.2rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  color: var(--text-primary);
  animation: fade-up 0.8s 0.15s var(--ease-out-expo) both;
}

.hero h1 .accent {
  background: var(--gradient-accent);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-shift 4s ease infinite;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 48px;
  line-height: 1.7;
  animation: fade-up 0.8s 0.3s var(--ease-out-expo) both;
}

.hero-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
  animation: fade-up 0.8s 0.5s var(--ease-out-expo) both;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: linear-gradient(180deg, transparent, var(--border-light), transparent);
}

.hero-glow {
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 700px;
  background:
    radial-gradient(ellipse at center, rgba(0, 228, 184, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 60% 40%, rgba(0, 119, 182, 0.06) 0%, transparent 50%);
  pointer-events: none;
  z-index: 1;
  animation: float-glow 6s ease-in-out infinite;
}

/* ===== PROBLEM ===== */
.problem {
  padding: 100px 24px;
  background: var(--bg-secondary);
  position: relative;
}

.problem-inner {
  max-width: 1000px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.problem-label,
.how-label,
.features-label {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 12px;
}

.problem h2,
.how h2,
.features h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
  color: var(--text-primary);
}

.data-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

.data-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--glass-shadow), var(--glass-highlight);
  transition: transform var(--transition-medium), border-color var(--transition-fast), box-shadow var(--transition-medium);
}

.data-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 228, 184, 0.2);
  box-shadow: var(--glass-shadow), var(--glass-highlight), 0 0 30px rgba(0, 228, 184, 0.06);
}

.data-icon { font-size: 1.5rem; margin-bottom: 12px; }

.data-type {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.data-detail {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.problem-note {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 700px;
  line-height: 1.7;
  border-left: 2px solid var(--accent);
  padding-left: 20px;
}

/* ===== HOW ===== */
.how {
  padding: 100px 24px;
  position: relative;
}

.how-inner {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.steps { display: flex; flex-direction: column; gap: 0; }

.step {
  display: flex;
  gap: 28px;
  align-items: flex-start;
  padding: 8px 0;
}

.step-num {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.5;
  min-width: 60px;
  line-height: 1;
  padding-top: 4px;
}

.step-content h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-primary);
}

.step-content p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.step-line {
  width: 1px;
  height: 32px;
  background: linear-gradient(180deg, var(--accent), transparent);
  margin-left: 30px;
  opacity: 0.3;
}

/* ===== FEATURES ===== */
.features {
  padding: 100px 24px;
  background: var(--bg-secondary);
  position: relative;
}

.features-inner {
  max-width: 1000px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.feature-blocks {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.feature-block {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--glass-shadow), var(--glass-highlight);
  transition: transform var(--transition-medium), border-color var(--transition-fast), box-shadow var(--transition-medium);
}

.feature-block:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 228, 184, 0.2);
  box-shadow: var(--glass-shadow), var(--glass-highlight), 0 0 30px rgba(0, 228, 184, 0.06);
}

.feature-wide { grid-column: span 2; }

.feature-tag {
  display: inline-block;
  padding: 3px 12px;
  background: var(--accent-dim);
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 14px;
}

.feature-block h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.feature-block p {
  font-size: 0.93rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ===== CLOSING ===== */
.closing {
  position: relative;
  padding: 140px 24px;
  text-align: center;
  overflow: hidden;
}

.closing-inner {
  max-width: 650px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.closing-glow {
  position: absolute;
  bottom: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 500px;
  background:
    radial-gradient(ellipse at center, rgba(0, 228, 184, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 40% 60%, rgba(100, 80, 200, 0.04) 0%, transparent 50%);
  pointer-events: none;
  z-index: 1;
  animation: float-glow 8s ease-in-out infinite;
}

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 24px;
  color: var(--text-primary);
}

.closing p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.closing-small {
  font-size: 0.95rem !important;
  color: var(--accent) !important;
  font-weight: 500;
  margin-top: 24px;
}

/* ===== FOOTER ===== */
.site-footer {
  padding: 48px 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.footer-note {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero { padding: 100px 20px 80px; }
  .hero-stats { gap: 20px; }
  .stat-divider { display: none; }
  .data-grid { grid-template-columns: 1fr; }
  .feature-blocks { grid-template-columns: 1fr; }
  .feature-wide { grid-column: span 1; }
  .problem, .how, .features { padding: 64px 20px; }
  .closing { padding: 100px 20px; }
  .step { gap: 16px; }
  .step-num { font-size: 1.6rem; min-width: 40px; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 2rem; }
  .stat-num { font-size: 1.4rem; }
  .hero-stats { flex-direction: column; gap: 16px; }
}