/* ===========================
   AvalonX Design System
   =========================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=Noto+Sans+KR:wght@400;500;600;700;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Premium dark backgrounds */
  --bg-primary: #050505;
  --bg-secondary: #0A0A0B;
  --bg-elevated: #121216;
  --bg-sunken: #000000;
  --bg-card: rgba(255, 255, 255, 0.03);
  --bg-card-hover: rgba(255, 255, 255, 0.05);

  /* Subtle borders */
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);

  /* Brand colors */
  --blue: #3b82f6;
  --blue-dark: #2563eb;
  --blue-light: #60a5fa;
  --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);

  /* Accent: vibrant purple */
  --accent: #8b5cf6;
  --accent-hover: #7c3aed;
  --accent-subtle: rgba(139, 92, 246, 0.15);

  /* Semantic */
  --success: #10b981;
  --warning: #f59e0b;
  --error: #ef4444;
  --info: #3b82f6;

  /* Text */
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.4);

  /* Typography */
  --font-sans: 'Inter', 'Noto Sans KR', -apple-system, sans-serif;
  --font-display: 'Inter', 'Noto Sans KR', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Spacing & radius */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-card: 0 20px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 25px rgba(139, 92, 246, 0.25);

  --nav-height: 72px;
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3,
.section-title,
.hero h1,
.page-hero h1 {
  font-family: var(--font-display);
}

h4, h5, h6,
.nav-links a,
.btn,
.nav-logo {
  font-family: var(--font-sans);
}

code, pre, .diagram-node, .arch-chip {
  font-family: var(--font-mono);
}

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

/* ===========================
   Typography
   =========================== */
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
  padding: 4px 12px;
  background: var(--accent-subtle);
  border: 1px solid rgba(30, 107, 255, 0.2);
  border-radius: var(--radius-sm);
}

.section-label::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.section-title {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-subtitle {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--text-secondary);
  max-width: 600px;
  line-height: 1.7;
}

/* ===========================
   Layout
   =========================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 72px 0;
  position: relative;
}

/* ===========================
   Navigation
   =========================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  transition: var(--transition);
  border-bottom: 1px solid transparent;
}

.nav.scrolled {
  background: rgba(5, 5, 5, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: rgba(255,255,255,0.05);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.nav-logo-img {
  display: block;
  width: auto;
  height: 34px;
  max-width: 220px;
  object-fit: contain;
}

.footer-logo {
  margin-bottom: 14px;
  display: inline-flex;
}

.footer-logo .nav-logo-img {
  height: 30px;
  max-width: 200px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.06);
}

.nav-links a.active {
  color: var(--accent);
}

.nav-cta {
  display: flex;
  gap: 10px;
  align-items: center;
}

/* ===========================
   Buttons
   =========================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  font-family: var(--font-sans);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #FFFFFF;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.05);
}

.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid rgba(30, 107, 255, 0.35);
}

.btn-outline:hover {
  background: var(--accent-subtle);
  border-color: var(--accent);
}

.btn-lg { padding: 16px 32px; font-size: 16px; border-radius: var(--radius-lg); }
.btn-sm { padding: 8px 16px; font-size: 13px; }

/* ===========================
   Cards
   =========================== */
.card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
}

.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.1) 0%, transparent 60%);
  opacity: 0;
  transition: var(--transition);
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-4px) scale(1.01);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.card:hover::before { opacity: 1; }

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
  flex-shrink: 0;
}

.icon-blue { background: var(--accent-subtle); }
.icon-purple { background: rgba(74, 127, 181, 0.14); }
.icon-teal { background: rgba(61, 122, 95, 0.14); }
.icon-pink { background: rgba(184, 115, 51, 0.14); }

.card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

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

/* ===========================
   Hero Section
   =========================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-height) + 40px) 0 60px;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 0;
  pointer-events: none;
}

.hero-bg::before,
.hero-bg::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.35;
  animation: float 12s ease-in-out infinite alternate;
}

.hero-bg::before {
  top: -20%;
  left: -10%;
  width: 50vw;
  height: 50vw;
  background: var(--blue);
}

.hero-bg::after {
  bottom: -20%;
  right: -10%;
  width: 60vw;
  height: 60vw;
  background: var(--accent);
  animation-delay: -6s;
}

#particles-canvas {
  display: none;
}

.hero-grid {
  display: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero-text {
  max-width: 560px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  font-family: var(--font-mono);
  background: var(--accent-subtle);
  border: 1px solid var(--accent);
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease both;
}

.hero-badge span { color: var(--accent); font-weight: 600; }

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  animation: fadeInUp 0.6s ease 0.1s both;
}

.hero h1 .accent-word {
  color: var(--accent);
}

.hero-sub {
  font-size: clamp(15px, 1.5vw, 17px);
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 32px;
  max-width: 440px;
  animation: fadeInUp 0.6s ease 0.2s both;
}

.hero-sub br { display: block; content: ''; }

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  animation: fadeInUp 0.6s ease 0.3s both;
}

/* Terminal mockup in hero */
.hero-terminal {
  background: rgba(10, 10, 11, 0.6);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  overflow: hidden;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  box-shadow: 0 30px 60px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.05);
  animation: fadeInUp 0.6s ease 0.2s both, float 6s ease-in-out infinite;
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.terminal-dot { width: 10px; height: 10px; border-radius: 50%; }
.terminal-dot:nth-child(1) { background: var(--error); }
.terminal-dot:nth-child(2) { background: var(--warning); }
.terminal-dot:nth-child(3) { background: var(--success); }
.terminal-bar span { font-size: 11px; color: var(--text-muted); margin-left: auto; }

.terminal-body {
  padding: 16px 24px;
  color: var(--text-secondary);
}

.terminal-body .prompt { color: var(--accent); }
.terminal-body .result { color: var(--success); }
.terminal-body .dim { color: var(--text-muted); }
.terminal-body .highlight { color: var(--text-primary); font-weight: 500; }
.terminal-line { margin-bottom: 4px; }

/* ===========================
   Problem Section
   =========================== */
.problem {
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

.problem::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--border);
}

.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.problem-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
  cursor: default;
}

.problem-item:hover {
  border-color: rgba(255, 255, 255, 0.15);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.problem-icon {
  font-size: 28px;
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-subtle);
  border-radius: var(--radius-md);
}

.problem-items { display: flex; flex-direction: column; gap: 16px; }

.problem-item-text h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.problem-item-text p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ===========================
   Solution Section
   =========================== */
.solution {
  position: relative;
  overflow: hidden;
}

.solution-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.solution-visual {
  position: relative;
}

.solution-diagram {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.diagram-node {
  flex: 1;
  padding: 18px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  text-align: center;
  transition: var(--transition);
}

.diagram-node.active {
  background: var(--accent-subtle);
  border-color: rgba(30, 107, 255, 0.24);
  color: var(--accent);
}

.diagram-node.active-purple {
  background: rgba(74, 127, 181, 0.10);
  border-color: rgba(74, 127, 181, 0.24);
  color: var(--info);
}

.diagram-node.active-teal {
  background: rgba(61, 122, 95, 0.10);
  border-color: rgba(61, 122, 95, 0.24);
  color: var(--success);
}

/* ===========================
   Capabilities Section
   =========================== */
.capabilities {
  background: var(--bg-secondary);
}

.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.cap-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.cap-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  opacity: 0;
  transition: var(--transition);
}

.cap-card.blue::after { background: var(--accent); }
.cap-card.purple::after { background: var(--info); }
.cap-card.teal::after { background: var(--success); }

.cap-card:hover {
  transform: translateY(-6px) scale(1.02);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-card), var(--shadow-glow);
}

.cap-card:hover::after { opacity: 1; }

.cap-icon {
  font-size: 32px;
  margin-bottom: 20px;
  display: block;
}

.cap-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.cap-card > p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 28px;
  line-height: 1.7;
}

.cap-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.cap-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}

.cap-list li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  flex-shrink: 0;
}

.cap-card.blue .cap-list li::before { background: var(--accent); }
.cap-card.purple .cap-list li::before { background: var(--info); }
.cap-card.teal .cap-list li::before { background: var(--success); }

/* ===========================
   Architecture Section
   =========================== */
.architecture {
  position: relative;
  overflow: hidden;
}

.arch-diagram {
  max-width: 800px;
  margin: 60px auto 0;
}

.arch-layer {
  padding: 28px 36px;
  border-radius: var(--radius-lg);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 20px;
  transition: var(--transition);
  cursor: default;
}

.arch-layer-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  white-space: nowrap;
  min-width: 100px;
}

.arch-layer-content {
  flex: 1;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.arch-chip {
  padding: 8px 16px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  white-space: nowrap;
}

.arch-layer.interface {
  background: var(--accent-subtle);
  border: 1px solid rgba(30, 107, 255, 0.20);
}
.arch-layer.interface .arch-layer-label { color: var(--accent); }
.arch-layer.interface .arch-chip { background: rgba(30, 107, 255, 0.12); color: var(--accent); border: 1px solid rgba(30, 107, 255, 0.20); }

.arch-layer.intelligence {
  background: rgba(74, 127, 181, 0.08);
  border: 1px solid rgba(74, 127, 181, 0.18);
}
.arch-layer.intelligence .arch-layer-label { color: var(--info); }
.arch-layer.intelligence .arch-chip { background: rgba(74, 127, 181, 0.12); color: var(--info); border: 1px solid rgba(74, 127, 181, 0.18); }

.arch-layer.knowledge {
  background: rgba(61, 122, 95, 0.08);
  border: 1px solid rgba(61, 122, 95, 0.18);
}
.arch-layer.knowledge .arch-layer-label { color: var(--success); }
.arch-layer.knowledge .arch-chip { background: rgba(61, 122, 95, 0.12); color: var(--success); border: 1px solid rgba(61, 122, 95, 0.18); }

.arch-arrow {
  text-align: center;
  font-size: 18px;
  color: var(--text-muted);
  padding: 4px 0;
}

.arch-layer:hover {
  transform: scale(1.01);
}

/* ===========================
   Differentiation Section
   =========================== */
.differentiation {
  background: var(--bg-secondary);
}

.diff-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 60px;
}

.diff-item {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}

.diff-item:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
}

.diff-num {
  font-size: 13px;
  font-weight: 800;
  color: var(--accent);
  background: var(--accent-subtle);
  border: 1px solid rgba(30, 107, 255, 0.20);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.diff-item-content h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.diff-item-content p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ===========================
   Use Cases Section
   =========================== */
.use-cases {
  position: relative;
  overflow: hidden;
}

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.uc-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px;
  transition: var(--transition);
  display: flex;
  align-items: flex-start;
  gap: 24px;
}

.uc-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.uc-icon {
  font-size: 36px;
  flex-shrink: 0;
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
}

.uc-content h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.uc-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===========================
   CTA Section
   =========================== */
.cta-section {
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}

.cta-inner {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-inner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(30, 107, 255, 0.04) 0%, transparent 70%),
              radial-gradient(ellipse at 70% 50%, rgba(30, 107, 255, 0.03) 0%, transparent 70%);
}

.cta-inner > * { position: relative; z-index: 1; }

.cta-inner h2 {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.cta-inner p {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 48px;
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===========================
   Footer
   =========================== */
.footer {
  border-top: 1px solid var(--border);
  padding: 60px 0 40px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h5 {
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

.footer-col ul { display: flex; flex-direction: column; gap: 10px; }

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

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-muted);
}

/* ===========================
   Page Hero (inner pages)
   =========================== */
.page-hero {
  padding: calc(var(--nav-height) + 56px) 0 60px;
  position: relative;
  overflow: hidden;
  text-align: center;
}

.page-hero-bg {
  position: absolute;
  inset: 0;
  background: var(--bg-secondary);
}

.page-hero-grid {
  display: none;
}

.page-hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  margin: 0 auto;
}

.page-hero h1 {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
}

.page-hero p {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===========================
   Solutions Page
   =========================== */
.solutions-section { padding: 80px 0; }

.sol-card {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: 24px;
  transition: var(--transition);
}

.sol-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card);
}

.sol-part {
  padding: 40px;
  border-right: 1px solid var(--border);
}

.sol-part:last-child { border-right: none; }

.sol-part-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.sol-part.problem-part .sol-part-label { color: var(--warning); }
.sol-part.solution-part .sol-part-label { color: var(--accent); }
.sol-part.benefit-part .sol-part-label { color: var(--success); }

.sol-part h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.sol-part p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.benefit-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

.benefit-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}

.benefit-check {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(30, 107, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--success);
  flex-shrink: 0;
}

/* ===========================
   Technology Page
   =========================== */
.tech-section { padding: 80px 0; }

.tech-stack {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 60px;
}

.tech-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 36px 32px;
  transition: var(--transition);
}

.tech-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.tech-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
}

.tech-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

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

.deploy-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 60px;
}

.deploy-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px;
  transition: var(--transition);
}

.deploy-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card);
}

.deploy-card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

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

/* ===========================
   Use Cases Page
   =========================== */
.uc-section { padding: 80px 0; }

.uc-detail-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: 24px;
  transition: var(--transition);
}

.uc-detail-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-card);
}

.uc-detail-header {
  padding: 40px 40px 24px;
  display: flex;
  align-items: center;
  gap: 20px;
  border-bottom: 1px solid var(--border);
}

.uc-detail-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  flex-shrink: 0;
}

.uc-detail-header h2 {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.uc-detail-header p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.uc-detail-body {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.uc-detail-col {
  padding: 32px 40px;
  border-right: 1px solid var(--border);
}

.uc-detail-col:last-child { border-right: none; }

.uc-detail-col-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.uc-detail-col.problem-col .uc-detail-col-label { color: var(--warning); }
.uc-detail-col.solution-col .uc-detail-col-label { color: var(--accent); }
.uc-detail-col.outcome-col .uc-detail-col-label { color: var(--success); }

.uc-detail-col p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.uc-outcome-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.uc-outcome-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}

.uc-outcome-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  flex-shrink: 0;
}

/* ===========================
   About Page
   =========================== */
.about-section { padding: 80px 0; }

.vision-mission-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 60px;
}

.vm-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 48px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.vm-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.vm-card.vision::before { background: var(--gradient-primary); }
.vm-card.mission::before { background: linear-gradient(90deg, var(--success), var(--info)); }
.vm-card.position::before { background: linear-gradient(90deg, var(--info), var(--accent)); }

.vm-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.vm-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.vm-card h2 {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.vm-card p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.position-card {
  grid-column: 1 / -1;
}

.position-tags {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.position-tag {
  padding: 8px 18px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 600;
  background: var(--accent-subtle);
  border: 1px solid rgba(30, 107, 255, 0.20);
  color: var(--accent);
}

/* ===========================
   Contact Page
   =========================== */
.contact-section { padding: 80px 0; }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  align-items: start;
}

.contact-info h2 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.contact-info p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
}

.contact-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  font-size: 14px;
  color: var(--text-secondary);
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 48px;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 8px;
  letter-spacing: 0.02em;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-size: 15px;
  font-family: var(--font-sans);
  color: var(--text-primary);
  transition: var(--transition);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--accent);
  background: rgba(30, 107, 255, 0.04);
  box-shadow: 0 0 0 4px rgba(30, 107, 255, 0.06);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-group select option {
  background: var(--bg-secondary);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* ===========================
   Scroll Animations
   =========================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }

/* ===========================
   Animations
   =========================== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

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

/* ===========================
   Mobile Menu
   =========================== */
.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.nav-mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===========================
   Sub-pages Light Theme (Upstage Style)
   =========================== */
.section-light {
  background: #F8F9FA;
  color: #050505;
}
.section-light .section-subtitle { color: #4A4A5A; }
.section-light .section-title { color: #0B0D17; margin-bottom: 24px; }
.section-light .section-label { 
  background: rgba(90, 88, 242, 0.1); 
  border-color: rgba(90, 88, 242, 0.2); 
  color: #5A58F2; 
}
.section-light .section-label::before { background: #5A58F2; }
.section-light p { color: #4A4A5A; }
.section-light h2, .section-light h3, .section-light h4 { color: #0B0D17; }

.card-light {
  background: #FFFFFF;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 16px;
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}
.card-light:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 12px 30px rgba(90, 88, 242, 0.08);
  border-color: rgba(90, 88, 242, 0.2);
}
.card-light .card-icon {
  background: #F8F9FA;
  color: #050505;
  border: 1px solid rgba(0,0,0,0.05);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 14px;
}
.card-light p {
  color: #4A4A5A !important;
}
.tech-font {
  font-family: var(--font-mono) !important;
  font-weight: 600;
  letter-spacing: 0.01em;
}

/* use-cases.html overrides */
.section-light.uc-section { background: #F8F9FA; }
.section-light .uc-detail-card {
  background: #FFFFFF;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}
.section-light .uc-detail-card:hover {
  border-color: rgba(90, 88, 242, 0.2);
  box-shadow: 0 12px 30px rgba(90, 88, 242, 0.08);
}
.section-light .uc-detail-header h2 { color: #0B0D17; }
.section-light .uc-detail-col-label {
  color: #5A58F2;
  background: rgba(90, 88, 242, 0.08);
}
.section-light .uc-outcome-item { color: #0B0D17; font-weight: 500; background: #F8F9FA; border-color: rgba(0,0,0,0.05); }
.section-light .uc-outcome-item .uc-outcome-dot { background: #5A58F2; }

/* about.html overrides */
.section-light .about-hero-quote {
  background: #FFFFFF;
  border: 1px solid rgba(0, 0, 0, 0.08);
  color: #0B0D17;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.05);
}
.section-light .vm-card {
  background: #FFFFFF;
  border: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}
.section-light .vm-card:hover { border-color: rgba(90, 88, 242, 0.2); }
.section-light .vm-label { background: rgba(90, 88, 242, 0.1); color: #5A58F2; }
.section-light .position-tag { border-color: rgba(0, 0, 0, 0.1); background: #F8F9FA; color: #4A4A5A; }
.section-light .diff-item {
  background: #FFFFFF;
  border: 1px solid rgba(0, 0, 0, 0.08);
}
.section-light .diff-num { color: rgba(90, 88, 242, 0.2); }

/* contact.html overrides */
.section-light input, .section-light textarea {
  background: #FFFFFF;
  border: 1px solid rgba(0, 0, 0, 0.1);
  color: #0B0D17;
}
.section-light input:focus, .section-light textarea:focus {
  border-color: #5A58F2;
  box-shadow: 0 0 0 3px rgba(90, 88, 242, 0.1);
  background: #FFFFFF;
}
.section-light label { color: #4A4A5A; }
.section-light .required-mark { color: #5A58F2; }

/* ===========================
   Responsive
   =========================== */
@media (max-width: 1024px) {
  .capabilities-grid { grid-template-columns: 1fr 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .sol-card { grid-template-columns: 1fr; }
  .sol-part { border-right: none; border-bottom: 1px solid var(--border); }
  .sol-part:last-child { border-bottom: none; }
}

@media (max-width: 768px) {
  section { padding: 60px 0; }
  .nav-links { display: none; }
  .nav-mobile-toggle { display: flex; }
  .nav-logo-img { height: 28px; max-width: 180px; }
  .footer-logo .nav-logo-img { height: 26px; max-width: 170px; }
  .hero h1 { font-size: 40px; }
  .hero-content { grid-template-columns: 1fr; gap: 32px; }
  .hero h1 { font-size: 36px; }
  .hero-actions { flex-direction: column; }
  .problem-grid { grid-template-columns: 1fr; }
  .solution-content { grid-template-columns: 1fr; }
  .capabilities-grid { grid-template-columns: 1fr; }
  .diff-grid { grid-template-columns: 1fr; }
  .use-cases-grid { grid-template-columns: 1fr; }
  .cta-inner { padding: 48px 24px; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .vision-mission-grid { grid-template-columns: 1fr; }
  .diff-grid { grid-template-columns: 1fr; }
  .tech-stack { grid-template-columns: 1fr; }
  .deploy-grid { grid-template-columns: 1fr; }
  .uc-detail-body { grid-template-columns: 1fr; }
  .uc-detail-col { border-right: none; border-bottom: 1px solid var(--border); }
  .uc-detail-col:last-child { border-bottom: none; }
  .arch-layer { flex-direction: column; align-items: flex-start; }
  .contact-form { padding: 32px 24px; }
}