/* ============================================================
   XPERYN — Liquid Glass Stylesheet
   White premium AI startup aesthetic
   ============================================================ */

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

:root {
  --bg:        #ffffff;
  --bg-2:      #f8f9fa;
  --bg-3:      #f1f3f5;
  --surface:   #ffffff;
  --surface-2: #f5f6f8;
  --border:    rgba(0,0,0,0.06);
  --border-2:  rgba(0,0,0,0.10);
  --text:      #1a1a1a;
  --text-2:    #555555;
  --text-3:    #999999;
  --accent:    rgba(0,132,255,0.9);
  --accent-solid: #0084ff;
  --accent-2:  #319AFF;
  --accent-glow: rgba(96,177,255,0.15);
  --glass-bg:  rgba(255,255,255,0.3);
  --glass-border: rgba(0,0,0,0.1);
  --glass-shadow: inset 0px 4px 4px 0px rgba(255,255,255,0.25);
  --font-heading: 'Fustat', 'SF Pro Display', -apple-system, sans-serif;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;
  --radius: 16px;
  --radius-sm: 10px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.gradient-text {
  background: linear-gradient(135deg, #0066dd 0%, #0084ff 30%, #60B1FF 60%, #a78bfa 100%);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 6s ease-in-out infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ============================================================
   NAVBAR — Liquid Glass
   ============================================================ */
#navbar {
  position: fixed;
  top: 30px; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  padding: 0 24px;
  transition: top var(--transition);
}

#navbar.scrolled { top: 12px; }

.nav-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 52px;
  padding: 0 28px;
  background: rgba(255,255,255,0.45);
  backdrop-filter: blur(50px) saturate(180%);
  -webkit-backdrop-filter: blur(50px) saturate(180%);
  border: 1px solid rgba(255,255,255,0.6);
  border-radius: var(--radius);
  box-shadow:
    inset 0px 4px 4px 0px rgba(255,255,255,0.35),
    0 4px 24px rgba(0,0,0,0.08),
    0 1px 2px rgba(0,0,0,0.04);
  width: fit-content;
  max-width: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  text-decoration: none;
}

.nav-logo-img {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  object-fit: cover;
  flex-shrink: 0;
}

.nav-logo-text {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text);
  font-family: var(--font-heading);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 28px;
}

.nav-links a {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  transition: color var(--transition);
}

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

.nav-cta {
  font-size: 13px;
  font-weight: 600;
  padding: 7px 18px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--glass-shadow);
  color: var(--text);
  transition: background var(--transition), transform var(--transition);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-cta:hover {
  background: rgba(255,255,255,0.5);
  transform: scale(1.02);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  margin-left: auto;
}

.nav-hamburger span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--text);
  transition: var(--transition);
}

/* Language Toggle */
.lang-toggle {
  display: flex;
  gap: 2px;
  background: rgba(0,0,0,0.04);
  border-radius: 8px;
  padding: 2px;
  flex-shrink: 0;
}

.lang-btn {
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-3);
  cursor: pointer;
  font-family: var(--font);
  transition: all var(--transition);
}

.lang-btn.lang-active {
  background: rgba(255,255,255,0.9);
  color: var(--text);
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: linear-gradient(135deg, rgba(0,102,221,0.9) 0%, rgba(0,132,255,0.85) 100%);
  backdrop-filter: blur(4px);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius);
  box-shadow:
    inset 0px 2px 4px 0px rgba(255,255,255,0.3),
    0 4px 20px rgba(0,132,255,0.35),
    0 1px 3px rgba(0,0,0,0.1);
  transition: transform var(--transition), box-shadow var(--transition);
  letter-spacing: -0.01em;
  border: none;
  cursor: pointer;
  font-family: var(--font);
}

.btn-primary:hover {
  transform: scale(1.03) translateY(-1px);
  box-shadow:
    inset 0px 2px 4px 0px rgba(255,255,255,0.3),
    0 8px 32px rgba(0,132,255,0.4),
    0 2px 6px rgba(0,0,0,0.1);
}

.btn-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  background: rgba(255,255,255,0.25);
  border-radius: 50%;
  font-size: 14px;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border: 1px solid var(--border-2);
  color: var(--text-2);
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius);
  transition: color var(--transition), border-color var(--transition), transform var(--transition);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: rgba(0,0,0,0.2);
  transform: translateY(-1px);
}

.btn-large { padding: 16px 36px; font-size: 15px; }

/* ============================================================
   HERO
   ============================================================ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
}

.glow-1 {
  width: 900px; height: 900px;
  background: radial-gradient(circle, #60B1FF 0%, #319AFF 40%, transparent 70%);
  top: -350px; left: -250px;
  opacity: 0.25;
  animation: glowFloat 8s ease-in-out infinite;
}

.glow-2 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #a78bfa 0%, #7c3aed 50%, transparent 70%);
  bottom: -200px; right: -100px;
  opacity: 0.12;
  animation: glowFloat 10s ease-in-out infinite reverse;
}

@keyframes glowFloat {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, -20px); }
}

.hero-mesh {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,132,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,132,255,0.04) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 100%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 60px;
}

.hero-content {
  flex: 1;
  max-width: 620px;
  animation: heroFadeIn 1s ease-out;
}

@keyframes heroFadeIn {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-2);
  border: 1px solid var(--border-2);
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 32px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
}

.hero-headline {
  font-size: clamp(42px, 5vw, 75px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -2px;
  margin-bottom: 24px;
  color: var(--text);
  font-family: var(--font-heading);
}

.hero-sub {
  font-size: 18px;
  color: var(--text-2);
  line-height: 1.65;
  max-width: 520px;
  margin-bottom: 40px;
  letter-spacing: -1px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Glassy Orb — cinematic */
.glassy-orb {
  position: relative;
  width: 420px;
  height: 420px;
  transform: scale(1.15);
}

.orb-glow {
  position: absolute;
  inset: -60px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,132,255,0.35) 0%, rgba(96,177,255,0.15) 40%, transparent 70%);
  filter: blur(40px);
  animation: orbGlow 4s ease-in-out infinite;
}

.orb-core {
  position: absolute;
  inset: 20px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%, rgba(255,255,255,0.9) 0%, transparent 50%),
    radial-gradient(circle at 70% 70%, rgba(0,132,255,0.5) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(96,177,255,0.8) 0%, rgba(49,154,255,0.4) 40%, rgba(0,100,220,0.15) 70%, transparent 100%);
  box-shadow:
    inset 0 0 60px rgba(255,255,255,0.4),
    inset 0 0 120px rgba(0,132,255,0.2),
    0 0 80px rgba(0,132,255,0.3),
    0 0 160px rgba(96,177,255,0.15);
  animation: orbPulse 5s ease-in-out infinite;
  backdrop-filter: blur(2px);
}

.orb-highlight {
  position: absolute;
  top: 40px; left: 50px;
  width: 120px; height: 80px;
  border-radius: 50%;
  background: radial-gradient(ellipse, rgba(255,255,255,0.7) 0%, transparent 70%);
  filter: blur(8px);
  animation: orbHighlight 5s ease-in-out infinite;
}

.orb-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(96,177,255,0.2);
}

.orb-ring-1 {
  inset: -10px;
  animation: orbRingSpin 20s linear infinite;
  border-style: dashed;
  border-color: rgba(0,132,255,0.12);
}

.orb-ring-2 {
  inset: -35px;
  animation: orbRingSpin 30s linear infinite reverse;
  border-color: rgba(96,177,255,0.08);
}

.orb-ring-3 {
  inset: -60px;
  border: 1px solid rgba(124,58,237,0.06);
  animation: orbRingSpin 40s linear infinite;
}

/* Floating particles */
.orb-particles {
  position: absolute;
  inset: -80px;
}

.orb-particles span {
  position: absolute;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: rgba(0,132,255,0.6);
  box-shadow: 0 0 6px rgba(0,132,255,0.4);
}

.orb-particles span:nth-child(1) { top: 10%; left: 20%; animation: particleFloat 6s ease-in-out infinite; }
.orb-particles span:nth-child(2) { top: 30%; right: 10%; animation: particleFloat 5s ease-in-out infinite 0.5s; width: 2px; height: 2px; }
.orb-particles span:nth-child(3) { bottom: 20%; left: 15%; animation: particleFloat 7s ease-in-out infinite 1s; }
.orb-particles span:nth-child(4) { top: 15%; right: 25%; animation: particleFloat 4s ease-in-out infinite 1.5s; width: 4px; height: 4px; }
.orb-particles span:nth-child(5) { bottom: 10%; right: 20%; animation: particleFloat 6s ease-in-out infinite 2s; width: 2px; height: 2px; }
.orb-particles span:nth-child(6) { top: 50%; left: 5%; animation: particleFloat 5s ease-in-out infinite 0.8s; }
.orb-particles span:nth-child(7) { bottom: 35%; right: 5%; animation: particleFloat 7s ease-in-out infinite 1.2s; width: 2px; height: 2px; background: rgba(124,58,237,0.5); }
.orb-particles span:nth-child(8) { top: 5%; left: 50%; animation: particleFloat 4.5s ease-in-out infinite 0.3s; background: rgba(124,58,237,0.4); }

@keyframes orbGlow {
  0%, 100% { opacity: 0.7; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.08); }
}

@keyframes orbPulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.03); }
}

@keyframes orbHighlight {
  0%, 100% { opacity: 0.6; transform: translate(0, 0); }
  50% { opacity: 0.9; transform: translate(5px, 3px); }
}

@keyframes orbRingSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes particleFloat {
  0%, 100% { transform: translate(0, 0); opacity: 0.4; }
  25% { transform: translate(8px, -12px); opacity: 0.8; }
  50% { transform: translate(-5px, -20px); opacity: 0.6; }
  75% { transform: translate(10px, -8px); opacity: 0.9; }
}

/* ============================================================
   TRUSTED STRIP
   ============================================================ */
.trusted-strip {
  padding: 48px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.trusted-label {
  font-size: 13px;
  color: var(--text-3);
  text-align: center;
  margin-bottom: 28px;
  letter-spacing: 0.02em;
}

.trusted-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}

.trusted-logo {
  width: 100px;
  height: 24px;
  color: var(--text-3);
  opacity: 0.5;
  transition: opacity var(--transition);
}

.trusted-logo:hover { opacity: 0.8; }

/* ============================================================
   SECTION COMMONS
   ============================================================ */
.section-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-solid);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
  color: var(--text);
  font-family: var(--font-heading);
}

.section-desc {
  font-size: 17px;
  color: var(--text-2);
  line-height: 1.7;
  max-width: 640px;
}

/* ============================================================
   THE PROBLEM
   ============================================================ */
.section-problem {
  padding: 120px 0;
  background: var(--bg-3);
}

.problem-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.problem-body {
  font-size: 16px;
  color: var(--text-2);
  line-height: 1.8;
  margin-bottom: 20px;
}

.highlight-text {
  color: var(--text) !important;
  font-size: 17px !important;
  border-left: 2px solid var(--accent-solid);
  padding-left: 20px;
  margin-top: 8px;
}

/* ============================================================
   STATS
   ============================================================ */
.section-stats {
  padding: 80px 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.stats-card {
  background: var(--bg);
  padding: 48px 36px;
  transition: background var(--transition), box-shadow var(--transition);
}

.stats-card:hover {
  background: rgba(0,132,255,0.02);
  box-shadow: 0 0 40px rgba(0,132,255,0.04);
}

.stats-value {
  font-size: 56px;
  font-weight: 700;
  letter-spacing: -0.04em;
  font-family: var(--font-heading);
  background: linear-gradient(135deg, #0066dd 0%, #60B1FF 50%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 16px;
}

.stats-label {
  font-size: 13px;
  color: var(--text-3);
  line-height: 1.6;
}

/* ============================================================
   PLATFORM
   ============================================================ */
.section-platform {
  padding: 120px 0;
  background: var(--bg-2);
}

.section-platform .container {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.platform-pillars {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 48px;
}

.pillar {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 24px;
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 2px 8px rgba(0,0,0,0.03), inset 0 1px 0 rgba(255,255,255,0.5);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.pillar:hover {
  border-color: rgba(0,132,255,0.12);
  box-shadow: 0 8px 32px rgba(0,132,255,0.06), inset 0 1px 0 rgba(255,255,255,0.5);
  transform: translateY(-2px);
}

.pillar-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-solid);
  flex-shrink: 0;
}

.pillar-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}

.pillar-desc {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.5;
}

/* ============================================================
   CAPABILITIES
   ============================================================ */
.section-capabilities {
  padding: 120px 0;
  background: var(--bg);
}

.section-capabilities .container {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.cap-card {
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 40px 36px;
  transition: background var(--transition), box-shadow var(--transition);
}

.cap-card:hover {
  background: rgba(255,255,255,0.9);
  box-shadow: 0 8px 32px rgba(0,132,255,0.06);
}

.cap-icon-wrap {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(0,132,255,0.15);
  border-radius: var(--radius-sm);
  color: var(--accent-solid);
  margin-bottom: 24px;
  background: rgba(0,132,255,0.05);
}

.cap-card h3 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  color: var(--text);
}

.cap-card p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.65;
}

/* ============================================================
   HOW IT WORKS
   ============================================================ */
.section-how {
  padding: 120px 0;
  background: var(--bg-2);
}

.section-how .container {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.how-steps {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
}

.how-step {
  display: flex;
  gap: 48px;
  align-items: flex-start;
  padding: 48px;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.how-step:last-child { border-bottom: none; }
.how-step:hover { background: var(--bg-2); }

.how-step-num {
  font-size: 13px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent-solid);
  letter-spacing: 0.08em;
  flex-shrink: 0;
  padding-top: 4px;
  min-width: 32px;
}

.how-step-content h3 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
  color: var(--text);
}

.how-step-content p {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.75;
  max-width: 680px;
}

/* ============================================================
   SUBJECTS
   ============================================================ */
.section-subjects {
  padding: 120px 0;
  background: var(--bg-3);
}

.section-subjects .container {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.subjects-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.subjects-col {
  padding: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.subjects-col-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-solid);
  margin-bottom: 20px;
}

.subjects-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.subjects-list li {
  font-size: 14px;
  color: var(--text-2);
  padding-left: 16px;
  position: relative;
  line-height: 1.5;
}

.subjects-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent-solid);
  opacity: 0.5;
}

/* ============================================================
   WHY NOT GENERIC AI
   ============================================================ */
.section-difference {
  padding: 120px 0;
  background: var(--bg);
}

.section-difference .container {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.diff-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.diff-col {
  padding: 40px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
}

.diff-col-bad { background: var(--bg-2); }
.diff-col-good {
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(12px);
  border-color: rgba(0,132,255,0.2);
  box-shadow: 0 4px 32px rgba(0,132,255,0.06), inset 0 1px 0 rgba(255,255,255,0.6);
}

.diff-col-header { margin-bottom: 28px; }

.diff-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 12px;
  border-radius: 100px;
}

.diff-tag-bad {
  background: rgba(0,0,0,0.05);
  color: var(--text-3);
}

.diff-tag-good {
  background: rgba(0,132,255,0.1);
  color: var(--accent-solid);
}

.diff-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.diff-list li {
  font-size: 14px;
  line-height: 1.55;
  padding-left: 20px;
  position: relative;
}

.diff-col-bad .diff-list li { color: var(--text-3); }
.diff-col-bad .diff-list li::before {
  content: '\00d7';
  position: absolute;
  left: 0;
  color: var(--text-3);
  font-size: 13px;
}

.diff-col-good .diff-list li { color: var(--text-2); }
.diff-col-good .diff-list li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--accent-solid);
  font-size: 12px;
  top: 1px;
}

/* ============================================================
   WHO IT'S FOR
   ============================================================ */
.section-who {
  padding: 120px 0;
  background: var(--bg-2);
}

.section-who .container {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.who-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.who-card {
  padding: 40px 32px;
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 2px 8px rgba(0,0,0,0.04), inset 0 1px 0 rgba(255,255,255,0.6);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.who-card:hover {
  border-color: rgba(0,132,255,0.15);
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(0,132,255,0.08), inset 0 1px 0 rgba(255,255,255,0.6);
}

.who-number {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--accent-solid);
  margin-bottom: 20px;
  font-family: var(--font-mono);
}

.who-card h3 {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
  color: var(--text);
}

.who-card p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.65;
}

/* ============================================================
   WHAT WE'RE BUILDING
   ============================================================ */
.section-building {
  padding: 120px 0;
  background: var(--bg-3);
}

.section-building .container {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

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

.building-card {
  padding: 36px 32px;
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 2px 8px rgba(0,0,0,0.04), inset 0 1px 0 rgba(255,255,255,0.6);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.building-card:hover {
  border-color: rgba(0,132,255,0.15);
  transform: translateY(-6px);
  box-shadow: 0 16px 48px rgba(0,132,255,0.08), inset 0 1px 0 rgba(255,255,255,0.6);
}

.building-icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(0,132,255,0.15);
  border-radius: var(--radius-sm);
  color: var(--accent-solid);
  margin-bottom: 20px;
  background: rgba(0,132,255,0.05);
}

.building-card h3 {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 10px;
  color: var(--text);
}

.building-card p {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.65;
}

/* ============================================================
   WHAT'S COMING
   ============================================================ */
.section-coming {
  padding: 120px 0;
  background: var(--bg-2);
}

.section-coming .container {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

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

.coming-card {
  padding: 36px 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.coming-card:hover {
  border-color: var(--border-2);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.06);
}

.coming-card-featured {
  border-color: rgba(0,132,255,0.25);
  background: linear-gradient(135deg, rgba(0,132,255,0.06) 0%, rgba(124,58,237,0.03) 50%, var(--surface) 100%);
  box-shadow: 0 4px 24px rgba(0,132,255,0.08), inset 0 1px 0 rgba(255,255,255,0.6);
}

.coming-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-3);
  letter-spacing: 0.04em;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-active {
  background: var(--accent-solid);
  box-shadow: 0 0 8px rgba(0,132,255,0.5);
  animation: pulse 2s ease-in-out infinite;
}

.status-soon { background: var(--text-3); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.coming-card h3 {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}

.coming-card p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.65;
  flex: 1;
}

.coming-subjects {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.coming-tag {
  font-size: 11px;
  font-weight: 500;
  padding: 4px 10px;
  border: 1px solid var(--border-2);
  border-radius: 100px;
  color: var(--text-3);
  letter-spacing: 0.02em;
}

/* ============================================================
   EARLY ACCESS
   ============================================================ */
.section-early {
  padding: 120px 0;
  background: var(--bg);
  overflow: hidden;
}

.early-inner {
  position: relative;
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.early-glow {
  position: absolute;
  width: 800px;
  height: 500px;
  background: radial-gradient(ellipse, rgba(0,132,255,0.1) 0%, rgba(124,58,237,0.05) 40%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  animation: ctaGlow 6s ease-in-out infinite;
}

.early-desc {
  font-size: 17px;
  color: var(--text-2);
  line-height: 1.7;
  max-width: 520px;
}

.early-form {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.early-form-row {
  display: flex;
  gap: 12px;
}

.early-input {
  flex: 1;
  padding: 14px 20px;
  background: var(--bg-2);
  border: 1px solid var(--border-2);
  border-radius: 100px;
  color: var(--text);
  font-size: 14px;
  font-family: var(--font);
  outline: none;
  transition: border-color var(--transition);
}

.early-input::placeholder { color: var(--text-3); }
.early-input:focus { border-color: var(--accent-solid); }

.early-note {
  font-size: 12px;
  color: var(--text-3);
  text-align: center;
}

.early-form-success {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  background: rgba(0,132,255,0.06);
  border: 1px solid rgba(0,132,255,0.15);
  border-radius: var(--radius-sm);
  color: var(--accent-solid);
  font-size: 14px;
  width: 100%;
  justify-content: center;
}

.success-icon { flex-shrink: 0; }

.early-perks {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  padding-top: 8px;
}

.early-perk {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-2);
  justify-content: center;
}

.early-perk svg { color: var(--accent-solid); flex-shrink: 0; }

/* ============================================================
   ABOUT
   ============================================================ */
.section-about {
  padding: 120px 0;
  background: var(--bg-2);
}

.about-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-body {
  font-size: 16px;
  color: var(--text-2);
  line-height: 1.75;
  margin-bottom: 20px;
}

.about-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.stat-value {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.03em;
  font-family: var(--font-heading);
  background: linear-gradient(135deg, var(--accent-solid), #60B1FF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 12px;
  color: var(--text-3);
  margin-top: 4px;
  letter-spacing: 0.04em;
}

/* ============================================================
   FOUNDER NOTE
   ============================================================ */
.section-founder {
  padding: 120px 0;
  background: var(--bg);
}

.founder-inner {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.quote-mark {
  font-size: 80px;
  line-height: 0.6;
  color: var(--accent-solid);
  opacity: 0.2;
  font-family: Georgia, serif;
  margin-bottom: 32px;
}

blockquote {
  font-size: 22px;
  font-weight: 400;
  line-height: 1.65;
  color: var(--text);
  letter-spacing: -0.01em;
  margin-bottom: 40px;
}

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

.founder-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}

.founder-title {
  font-size: 13px;
  color: var(--text-3);
}

/* ============================================================
   MISSION / VISION
   ============================================================ */
.section-mission {
  padding: 80px 0;
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.mission-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.mission-card {
  background: var(--bg-2);
  padding: 48px 40px;
}

.mission-card-center {
  background: var(--surface);
}

.mission-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-solid);
  margin-bottom: 20px;
}

.mission-card p {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.7;
}

/* ============================================================
   WHY NOW
   ============================================================ */
.section-whynow {
  padding: 120px 0;
  background: var(--bg);
}

.whynow-inner {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
  align-items: start;
}

.whynow-right {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
}

.whynow-point {
  display: flex;
  gap: 28px;
  padding: 36px;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.whynow-point:last-child { border-bottom: none; }
.whynow-point:hover { background: var(--bg-2); }

.whynow-num {
  font-size: 12px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent-solid);
  letter-spacing: 0.08em;
  flex-shrink: 0;
  padding-top: 4px;
}

.whynow-point h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.whynow-point p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
}

/* ============================================================
   USE CASES
   ============================================================ */
.section-usecases {
  padding: 120px 0;
  background: var(--bg-2);
}

.section-usecases .container {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

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

.usecase-card {
  padding: 36px 32px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.usecase-card:hover {
  border-color: var(--border-2);
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.06);
}

.usecase-scenario {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-solid);
  letter-spacing: 0.02em;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}

.usecase-card p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
}

/* ============================================================
   ROADMAP
   ============================================================ */
.section-roadmap {
  padding: 120px 0;
  background: var(--bg-3);
}

.section-roadmap .container {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.roadmap-list {
  display: flex;
  flex-direction: column;
}

.roadmap-item {
  display: flex;
  gap: 32px;
}

.roadmap-marker {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  padding-top: 4px;
}

.roadmap-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg-2);
  border: 2px solid var(--border-2);
  flex-shrink: 0;
}

.roadmap-dot-active {
  background: var(--accent-solid);
  border-color: var(--accent-solid);
  box-shadow: 0 0 12px rgba(0,132,255,0.4);
}

.roadmap-line {
  width: 1px;
  flex: 1;
  min-height: 40px;
  background: var(--border-2);
  margin: 8px 0;
}

.roadmap-content {
  padding-bottom: 56px;
  flex: 1;
}

.roadmap-item:last-child .roadmap-content { padding-bottom: 0; }

.roadmap-version {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 10px;
}

.roadmap-active .roadmap-version { color: var(--accent-solid); }

.roadmap-content h3 {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 12px;
}

.roadmap-content p {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.75;
  max-width: 680px;
  margin-bottom: 20px;
}

.roadmap-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.roadmap-tag {
  font-size: 11px;
  font-weight: 500;
  padding: 4px 12px;
  border: 1px solid var(--border-2);
  border-radius: 100px;
  color: var(--text-3);
}

.roadmap-active .roadmap-tag {
  border-color: rgba(0,132,255,0.25);
  color: var(--accent-solid);
}

/* ============================================================
   FAQ
   ============================================================ */
.section-faq {
  padding: 120px 0;
  background: var(--bg);
}

.section-faq .container {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  max-width: 800px;
  background: var(--surface);
}

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

.faq-item:last-child { border-bottom: none; }

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 28px 36px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  font-family: var(--font);
  transition: background var(--transition);
}

.faq-question:hover { background: var(--bg-2); }

.faq-icon {
  flex-shrink: 0;
  color: var(--text-3);
  transition: transform var(--transition);
}

.faq-item.open .faq-icon { transform: rotate(180deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-item.open .faq-answer { max-height: 300px; }

.faq-answer p {
  padding: 0 36px 28px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.75;
}

/* ============================================================
   CTA SECTION
   ============================================================ */
.section-cta {
  padding: 160px 0;
  background: var(--bg-2);
  overflow: hidden;
  position: relative;
}

.cta-inner {
  position: relative;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cta-glow {
  position: absolute;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(0,132,255,0.12) 0%, rgba(124,58,237,0.06) 40%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  animation: ctaGlow 6s ease-in-out infinite;
}

@keyframes ctaGlow {
  0%, 100% { opacity: 0.6; transform: translate(-50%, -50%) scale(1); }
  50% { opacity: 1; transform: translate(-50%, -50%) scale(1.1); }
}

.cta-inner h2 {
  font-size: clamp(36px, 4.5vw, 56px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 20px;
  font-family: var(--font-heading);
  color: var(--text);
}

.cta-inner p {
  font-size: 18px;
  color: var(--text-2);
  margin-bottom: 40px;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--bg-3);
  border-top: 1px solid var(--border);
  padding: 60px 0 32px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 60px;
  margin-bottom: 48px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.14em;
  margin-bottom: 10px;
  font-family: var(--font-heading);
  color: var(--text);
}

.footer-brand p {
  font-size: 13px;
  color: var(--text-3);
}

.footer-links {
  display: flex;
  gap: 60px;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col-title {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 4px;
}

.footer-col a {
  font-size: 14px;
  color: var(--text-2);
  transition: color var(--transition);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-3);
}

/* ============================================================
   SCROLL ANIMATIONS
   ============================================================ */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .about-split { grid-template-columns: 1fr; gap: 48px; }
  .hero-visual { display: none; }
  .hero-inner { justify-content: center; }
  .hero-content { max-width: 100%; text-align: center; }
  .hero-actions { justify-content: center; }
  .hero-badge { margin-left: auto; margin-right: auto; }
  .problem-inner { grid-template-columns: 1fr; gap: 40px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .subjects-wrap { grid-template-columns: 1fr; }
  .whynow-inner { grid-template-columns: 1fr; gap: 48px; }
  .usecase-grid { grid-template-columns: repeat(2, 1fr); }
  .coming-grid { grid-template-columns: 1fr; }
  .platform-pillars { grid-template-columns: 1fr; }
  .diff-grid { grid-template-columns: 1fr; }
  .building-grid { grid-template-columns: repeat(2, 1fr); }
  .trusted-logos { gap: 40px; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .nav-hamburger { display: flex; }
  .nav-inner { width: 100%; }
  .lang-toggle { margin-left: auto; margin-right: 8px; }

  #navbar { top: 12px; }
  #hero { padding: 100px 24px 80px; }
  .hero-headline { font-size: 38px; letter-spacing: -1px; }
  .hero-sub { font-size: 16px; letter-spacing: 0; }

  .cap-grid { grid-template-columns: 1fr; }
  .who-grid { grid-template-columns: 1fr; }
  .mission-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .building-grid { grid-template-columns: 1fr; }
  .usecase-grid { grid-template-columns: 1fr; }
  .how-step { flex-direction: column; gap: 16px; padding: 32px 24px; }
  .whynow-point { flex-direction: column; gap: 8px; padding: 28px 24px; }
  .faq-question { padding: 22px 24px; font-size: 14px; }
  .faq-answer p { padding: 0 24px 22px; }
  .roadmap-item { gap: 20px; }
  blockquote { font-size: 18px; }
  .early-form-row { flex-direction: column; }
  .early-input { border-radius: var(--radius-sm); }

  .about-stats { flex-direction: column; gap: 24px; }

  .footer-top { flex-direction: column; gap: 40px; }
  .footer-links { gap: 40px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }

  .trusted-logos { gap: 24px; }
  .trusted-logo { width: 80px; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-ghost { width: 100%; justify-content: center; }
  .section-title { font-size: 28px; }
}