/* ===================================
   OTK Scanner — Design System & Styles
   =================================== */

/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ── CSS Variables ── */
:root {
  /* Colors */
  --bg-primary: #0A0E27;
  --bg-secondary: #0f1333;
  --bg-card: #141832;
  --bg-card-hover: #1a1f4a;
  --bg-input: #1a1f3a;
  
  --accent: #00E5A0;
  --accent-dim: rgba(0, 229, 160, 0.15);
  --accent-glow: rgba(0, 229, 160, 0.3);
  --accent-blue: #4D7CFE;
  --accent-blue-dim: rgba(77, 124, 254, 0.15);
  
  --text-primary: #FFFFFF;
  --text-secondary: #8B95A5;
  --text-tertiary: #5a6478;
  
  --success: #00E5A0;
  --error: #FF4757;
  --warning: #FFA502;
  --info: #4D7CFE;
  
  --border: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(0, 229, 160, 0.25);
  
  /* Typography */
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  
  /* Spacing */
  --section-padding: 100px 0;
  --container-width: 1400px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background: var(--bg-primary);
}

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-blue);
}

img {
  max-width: 100%;
  height: auto;
}

/* ── Container ── */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 32px;
}

/* ── Glassmorphism Card ── */
.glass-card {
  background: rgba(20, 24, 50, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
}

.glass-card:hover {
  border-color: var(--border-accent);
  box-shadow: 0 0 30px rgba(0, 229, 160, 0.08);
}

/* ── Typography ── */
.gradient-text {
  background: linear-gradient(135deg, var(--accent), var(--accent-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, #7E1E1E, #A62B2B);
  color: var(--text-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(126, 30, 30, 0.45);
}

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

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

.btn-ghost {
  background: rgba(255,255,255,0.05);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  color: var(--text-primary);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  background: rgba(10, 14, 39, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: all var(--transition-normal);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-logo img {
  height: 36px;
  filter: brightness(0) invert(1);
}

.nav-logo-text {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-logo-divider {
  width: 1px;
  height: 24px;
  background: var(--border);
  margin: 0 4px;
}

.nav-logo-sub {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition-fast);
}

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

.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: rgba(20, 24, 50, 0.9);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  z-index: 1102;
  position: relative;
}

.nav-burger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-burger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-burger.open span:nth-child(2) {
  opacity: 0;
}

.nav-burger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

body.nav-open {
  overflow: hidden;
}

.upload-title-mobile {
  display: none;
}

/* ═══════════════════════════
   SECTION 1: HERO
   ═══════════════════════════ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: 80px;
  overflow: hidden;
}

/* Animated grid background */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    linear-gradient(rgba(0, 229, 160, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 160, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
  0% { transform: translate(0, 0); }
  100% { transform: translate(60px, 60px); }
}

/* Gradient orbs */
.hero::after {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 229, 160, 0.08), transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 500px;
  line-height: 1.7;
}

/* Metrics cards */
.hero-metrics {
  display: flex;
  gap: 16px;
  margin-bottom: 12px;
}

.metric-card {
  padding: 20px 24px;
  background: rgba(20, 24, 50, 0.6);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-align: center;
  flex: 1;
  transition: all var(--transition-normal);
}

.metric-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.metric-value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}

.metric-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 6px;
}

.hero-metrics-note {
  font-size: 0.8rem;
  color: var(--text-tertiary);
  margin-bottom: 32px;
}

/* Hero visual - floating documents */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 500px;
}

.floating-doc {
  position: absolute;
  width: 260px;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  transition: all var(--transition-slow);
  overflow: hidden;
  border: 2px solid rgba(0, 229, 160, 0.2);
}

.floating-doc:hover {
  transform: scale(1.05);
  border-color: var(--accent);
  box-shadow: 0 20px 60px rgba(0, 229, 160, 0.15);
}

.floating-doc-1 {
  animation: cycleDoc1 12s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.floating-doc-2 {
  animation: cycleDoc2 12s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.floating-doc-3 {
  animation: cycleDoc3 12s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

@keyframes cycleDoc1 {
  0%, 28% { /* Role A: Front & Center */
    transform: scale(1.1) translateX(0) translateY(0) rotate(-2deg);
    z-index: 5;
    opacity: 1;
    border-color: var(--accent);
    box-shadow: 0 20px 50px rgba(0, 229, 160, 0.25);
  }
  33%, 61% { /* Role B: Right & Back */
    transform: scale(0.85) translateX(120px) translateY(-30px) rotate(6deg);
    z-index: 2;
    opacity: 0.65;
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  }
  66%, 95% { /* Role C: Left & Back */
    transform: scale(0.85) translateX(-120px) translateY(30px) rotate(-8deg);
    z-index: 2;
    opacity: 0.65;
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  }
  100% {
    transform: scale(1.1) translateX(0) translateY(0) rotate(-2deg);
    z-index: 5;
    opacity: 1;
    border-color: var(--accent);
    box-shadow: 0 20px 50px rgba(0, 229, 160, 0.25);
  }
}

@keyframes cycleDoc2 {
  0%, 28% { /* Role B: Right & Back */
    transform: scale(0.85) translateX(120px) translateY(-30px) rotate(6deg);
    z-index: 2;
    opacity: 0.65;
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  }
  33%, 61% { /* Role C: Left & Back */
    transform: scale(0.85) translateX(-120px) translateY(30px) rotate(-8deg);
    z-index: 2;
    opacity: 0.65;
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  }
  66%, 95% { /* Role A: Front & Center */
    transform: scale(1.1) translateX(0) translateY(0) rotate(-2deg);
    z-index: 5;
    opacity: 1;
    border-color: var(--accent);
    box-shadow: 0 20px 50px rgba(0, 229, 160, 0.25);
  }
  100% {
    transform: scale(0.85) translateX(120px) translateY(-30px) rotate(6deg);
    z-index: 2;
    opacity: 0.65;
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  }
}

@keyframes cycleDoc3 {
  0%, 28% { /* Role C: Left & Back */
    transform: scale(0.85) translateX(-120px) translateY(30px) rotate(-8deg);
    z-index: 2;
    opacity: 0.65;
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  }
  33%, 61% { /* Role A: Front & Center */
    transform: scale(1.1) translateX(0) translateY(0) rotate(-2deg);
    z-index: 5;
    opacity: 1;
    border-color: var(--accent);
    box-shadow: 0 20px 50px rgba(0, 229, 160, 0.25);
  }
  66%, 95% { /* Role B: Right & Back */
    transform: scale(0.85) translateX(120px) translateY(-30px) rotate(6deg);
    z-index: 2;
    opacity: 0.65;
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  }
  100% {
    transform: scale(0.85) translateX(-120px) translateY(30px) rotate(-8deg);
    z-index: 2;
    opacity: 0.65;
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  }
}

.floating-doc img {
  width: 100%;
  display: block;
}

/* Scan line animation */
.scan-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  animation: scanLine 3s ease-in-out infinite;
  opacity: 0.6;
}

@keyframes scanLine {
  0% { top: 0; opacity: 0; }
  10% { opacity: 0.6; }
  90% { opacity: 0.6; }
  100% { top: 100%; opacity: 0; }
}


/* ═══════════════════════════
   SECTION 2: SUPPORTED DOCUMENTS
   ═══════════════════════════ */
.docs-section {
  padding: var(--section-padding);
  position: relative;
}

.section-title {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.section-subtitle {
  text-align: center;
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 60px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

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

.doc-card {
  padding: 32px;
  position: relative;
  overflow: hidden;
}

.doc-card::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, rgba(0, 229, 160, 0.2), transparent 50%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

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

.doc-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 8px;
}

.doc-card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  border-radius: var(--radius-md);
  font-size: 1.4rem;
  flex-shrink: 0;
}

.doc-card-title {
  font-size: 1.15rem;
  font-weight: 700;
}

.doc-card-meta {
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: 500;
}

.doc-card-fields {
  list-style: none;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.doc-card-fields li {
  font-size: 0.88rem;
  color: var(--text-secondary);
  padding: 6px 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.doc-card-fields li::before {
  content: '';
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}

/* ═══════════════════════════
   SECTION 3: DEMO ZONE
   ═══════════════════════════ */
.demo-section {
  padding: var(--section-padding);
  position: relative;
}

.demo-section::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  width: 1px;
  height: 100px;
  background: linear-gradient(to bottom, transparent, var(--accent));
}

.demo-container {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 24px;
  margin-top: 20px;
}

/* Upload Panel */
.upload-panel {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.upload-zone {
  border: 2px dashed rgba(0, 229, 160, 0.3);
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  background: rgba(0, 229, 160, 0.02);
  position: relative;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--accent);
  background: rgba(0, 229, 160, 0.05);
  box-shadow: 0 0 40px rgba(0, 229, 160, 0.1);
}

.upload-zone.drag-over {
  transform: scale(1.02);
}

.upload-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  opacity: 0.7;
}

.upload-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.upload-formats {
  font-size: 0.8rem;
  color: var(--text-tertiary);
}

.upload-input {
  display: none;
}

/* Progress Stepper */
.progress-stepper {
  display: flex;
  align-items: center;
  gap: 0;
  padding: 16px 20px;
}

.step {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-tertiary);
  transition: all var(--transition-normal);
  white-space: nowrap;
}

.step.active {
  color: var(--accent);
}

.step.completed {
  color: var(--success);
}

.step-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-tertiary);
  transition: all var(--transition-normal);
  flex-shrink: 0;
}

.step.active .step-dot {
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  animation: pulse 2s ease-in-out infinite;
}

.step.completed .step-dot {
  background: var(--success);
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 4px var(--accent-glow); }
  50% { box-shadow: 0 0 16px var(--accent-glow); }
}

.step-arrow {
  color: var(--text-tertiary);
  margin: 0 8px;
  font-size: 0.75rem;
}

/* Demo Buttons */
.demo-buttons {
  padding: 20px;
}

.demo-buttons-title {
  font-size: 0.82rem;
  color: var(--text-tertiary);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

.demo-btn-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.demo-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-family: var(--font-body);
  color: var(--text-secondary);
  font-size: 0.88rem;
}

.demo-btn:hover {
  background: var(--accent-dim);
  border-color: var(--border-accent);
  color: var(--text-primary);
}

.demo-btn-icon {
  font-size: 1.2rem;
}

/* Results Panel */
.results-panel {
  display: none;
  flex-direction: column;
  gap: 16px;
}

.results-panel.visible {
  display: flex;
}

/* Results Header */
.results-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.results-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--accent-dim);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
}

.results-timer {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: rgba(77, 124, 254, 0.1);
  border: 1px solid rgba(77, 124, 254, 0.25);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: var(--accent-blue);
  font-weight: 600;
}

.results-multi-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: rgba(255, 165, 2, 0.1);
  border: 1px solid rgba(255, 165, 2, 0.25);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: var(--warning);
  font-weight: 600;
}

/* Document Tabs */
.doc-tabs {
  display: flex;
  gap: 6px;
  background: rgba(20, 24, 50, 0.5);
  padding: 6px;
  border-radius: var(--radius-md);
  flex-wrap: wrap;
}

.doc-tab {
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  background: transparent;
  font-family: var(--font-body);
  white-space: nowrap;
}

.doc-tab:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.doc-tab.active {
  background: var(--accent-dim);
  color: var(--accent);
  border: 1px solid var(--border-accent);
}

/* Results Content (split view) */
.results-content {
  display: grid;
  grid-template-columns: 4.2fr 5.8fr;
  gap: 20px;
}

/* Document Image */
.doc-image-container {
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  min-width: 0;
}

.doc-image-container img {
  max-width: 100%;
  max-height: 450px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

/* Fields Table */
.fields-container {
  padding: 20px;
  min-width: 0;
}

.fields-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}

.fields-table th:nth-child(1),
.fields-table td:nth-child(1) {
  width: 40%;
}

.fields-table th:nth-child(2),
.fields-table td:nth-child(2) {
  width: 50%;
}

.fields-table th:nth-child(3),
.fields-table td:nth-child(3) {
  width: 10%;
  text-align: right;
}

.fields-table th {
  text-align: left;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  font-weight: 600;
}

.fields-table td {
  padding: 12px;
  font-size: 0.9rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  overflow-wrap: break-word;
}

.fields-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.field-name {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.field-name-inner {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  width: 100%;
}

.field-name-icon {
  flex-shrink: 0;
}

.field-name-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.field-value {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  overflow-wrap: break-word;
}

.field-status {
  color: var(--success);
  font-size: 1.1rem;
  text-align: right;
}

/* Placeholder */
.results-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  text-align: center;
  color: var(--text-tertiary);
}

.results-placeholder-icon {
  font-size: 4rem;
  margin-bottom: 16px;
  opacity: 0.3;
}

.results-placeholder-text {
  font-size: 1rem;
  max-width: 300px;
}

/* Loading State */
.loading-overlay {
  display: none;
  position: absolute;
  inset: 0;
  background: rgba(10, 14, 39, 0.8);
  backdrop-filter: blur(4px);
  z-index: 10;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 16px;
  border-radius: var(--radius-lg);
}

.loading-overlay.visible {
  display: flex;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.loading-timer {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  color: var(--accent);
  font-weight: 600;
}

/* ═══════════════════════════
   SECTION 4: ADVANTAGES
   ═══════════════════════════ */
.advantages-section {
  padding: var(--section-padding);
  background: linear-gradient(180deg, var(--bg-primary), var(--bg-secondary), var(--bg-primary));
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.advantage-card {
  padding: 32px;
  text-align: center;
}

.advantage-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.advantage-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.advantage-value {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 8px;
  font-family: var(--font-mono);
}

.advantage-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ═══════════════════════════
   SECTION 5: API DOCUMENTATION
   ═══════════════════════════ */
.api-section {
  padding: var(--section-padding);
}

/* Flow Chart */
.api-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.api-flow-step {
  padding: 20px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  text-align: center;
  min-width: 200px;
  transition: all var(--transition-normal);
}

.api-flow-step:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}

.api-flow-step-label {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.api-flow-step-method {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent);
}

.api-flow-step-icon {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.api-flow-arrow {
  font-size: 1.5rem;
  color: var(--text-tertiary);
  margin: 0 16px;
}

/* Code blocks */
.api-code-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.code-block {
  padding: 24px;
  border-radius: var(--radius-lg);
  background: #0d1117;
  border: 1px solid var(--border);
  overflow-x: auto;
}

.code-block-title {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.code-block pre {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  color: #e6edf3;
  white-space: pre-wrap;
  word-break: break-all;
}

.code-string { color: #a5d6ff; }
.code-key { color: var(--accent); }
.code-number { color: #FFA502; }
.code-method { color: #ff7b72; }
.code-url { color: #79c0ff; }
.code-comment { color: #8b949e; }

/* ═══════════════════════════
   FOOTER
   ═══════════════════════════ */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
  text-align: center;
}

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

/* ═══════════════════════════
   UTILITIES & ANIMATIONS
   ═══════════════════════════ */

/* Fade in on scroll */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Counter animation */
@keyframes countUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Glow effect on scroll */
.glow-border {
  position: relative;
}

.glow-border::after {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(135deg, var(--accent), var(--accent-blue), var(--accent));
  border-radius: inherit;
  z-index: -1;
  opacity: 0;
  transition: opacity var(--transition-normal);
  filter: blur(8px);
}

.glow-border:hover::after {
  opacity: 0.3;
}

/* Responsive */
@media (max-width: 1024px) {
  .container {
    padding: 0 20px;
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 40px;
  }
  
  .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
  
  .hero-visual {
    height: 340px;
  }

  .floating-doc {
    width: 200px;
  }
  
  .demo-container {
    grid-template-columns: 1fr;
  }
  
  .results-content {
    grid-template-columns: 1fr;
  }
  
  .docs-grid {
    grid-template-columns: 1fr;
  }
  
  .advantages-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .api-code-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 64px 0;
  }

  .container {
    padding: 0 16px;
  }

  .nav {
    padding: 12px 0;
    /* backdrop-filter creates a containing block and breaks fixed mobile menu */
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: #0A0E27;
    z-index: 1100;
  }

  .nav-inner {
    position: relative;
    z-index: 1102;
  }

  .nav-logo img {
    height: 28px;
  }

  .nav-logo-sub {
    font-size: 0.75rem;
    max-width: 110px;
    line-height: 1.2;
  }

  .nav-burger {
    display: flex;
  }

  .nav-links {
    display: flex;
    position: fixed;
    inset: 0;
    top: 0;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    gap: 0;
    padding: 88px 24px 40px;
    margin: 0;
    background: #0A0E27;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    transform: translateX(100%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform var(--transition-normal), opacity var(--transition-normal), visibility var(--transition-normal);
    z-index: 1100;
  }

  .nav-links.open {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .nav-links li {
    border-bottom: 1px solid var(--border);
  }

  .nav-links a {
    display: block;
    padding: 16px 4px;
    font-size: 1.1rem;
    color: var(--text-primary);
  }

  .hero {
    min-height: auto;
    padding: 96px 0 48px;
  }

  .hero-title {
    font-size: clamp(1.85rem, 8vw, 2.5rem);
  }

  .hero-subtitle {
    font-size: 1rem;
    margin-bottom: 28px;
  }
  
  .hero-metrics {
    flex-direction: row;
    gap: 10px;
  }

  .metric-card {
    padding: 14px 12px;
  }

  .metric-value {
    font-size: 1.5rem;
  }

  .metric-label {
    font-size: 0.72rem;
  }

  .hero-visual {
    height: 260px;
    margin-top: 8px;
    transform: scale(0.72);
    transform-origin: center top;
  }

  .floating-doc {
    width: 200px;
  }

  .section-title {
    font-size: clamp(1.5rem, 6vw, 2rem);
  }

  .section-subtitle {
    font-size: 0.95rem;
    padding: 0 4px;
  }
  
  .advantages-grid {
    grid-template-columns: 1fr;
  }
  
  .api-flow {
    flex-direction: column;
  }
  
  .api-flow-arrow {
    transform: rotate(90deg);
    margin: 8px 0;
  }

  .upload-zone {
    min-height: 200px;
    padding: 36px 20px;
  }

  .upload-title-desktop {
    display: none;
  }

  .upload-title-mobile {
    display: inline;
  }

  .upload-formats {
    font-size: 0.75rem;
    line-height: 1.4;
    padding: 0 8px;
  }

  .progress-stepper {
    padding: 14px 12px;
    justify-content: space-between;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .step {
    font-size: 0.72rem;
    gap: 6px;
  }

  .step-arrow {
    margin: 0 4px;
  }

  .demo-btn {
    min-height: 48px;
    padding: 14px 16px;
    font-size: 0.95rem;
  }

  .results-placeholder {
    min-height: 220px;
    padding: 24px 16px;
  }

  .results-placeholder-icon {
    font-size: 2.8rem;
  }

  .doc-tabs {
    overflow-x: auto;
    flex-wrap: nowrap;
    -webkit-overflow-scrolling: touch;
  }

  .doc-tab {
    flex-shrink: 0;
    padding: 10px 14px;
  }

  .doc-image-container {
    padding: 12px;
    min-height: 180px;
  }

  .doc-image-container img {
    max-height: 280px;
  }

  .fields-container {
    padding: 12px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .fields-table {
    min-width: 320px;
  }

  .fields-table th,
  .fields-table td {
    padding: 10px 8px;
    font-size: 0.82rem;
  }

  .field-value {
    font-size: 0.85rem;
  }

  .code-block {
    border-radius: var(--radius-md);
  }

  .code-block pre {
    font-size: 0.72rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding: 14px;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .btn-sm {
    width: auto;
    min-width: 160px;
  }

  .blob-1,
  .blob-2,
  .blob-3 {
    width: 280px;
    height: 280px;
    filter: blur(100px);
    opacity: 0.16;
  }
}

@media (max-width: 480px) {
  .nav-logo-divider,
  .nav-logo-sub {
    display: none;
  }

  .hero-title br {
    display: none;
  }

  .hero-visual {
    height: 200px;
    transform: scale(0.58);
  }

  .floating-doc {
    width: 200px;
  }

  .hero-metrics {
    flex-direction: column;
  }

  .progress-stepper .step span:not(.step-dot) {
    display: none;
  }

  .progress-stepper {
    justify-content: center;
    gap: 8px;
  }

  .step-arrow {
    margin: 0 10px;
  }

  .results-badge,
  .results-multi-badge,
  .results-timer {
    width: 100%;
    justify-content: center;
    text-align: center;
  }

  .fields-table th:nth-child(1),
  .fields-table td:nth-child(1) {
    width: 42%;
  }

  .fields-table th:nth-child(3),
  .fields-table td:nth-child(3) {
    width: 12%;
  }
}

/* Reduce motion for accessibility / battery on mobile */
@media (prefers-reduced-motion: reduce) {
  .floating-doc-1,
  .floating-doc-2,
  .floating-doc-3,
  .blob-1,
  .blob-2,
  .blob-3,
  .hero::before {
    animation: none !important;
  }
}

/* QR Section */
.qr-section {
  padding: var(--section-padding);
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
}

.qr-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  max-width: 1100px;
  margin: 0 auto;
  margin-top: 40px;
}

.qr-card {
  text-align: center;
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  box-sizing: border-box;
}

.qr-card-title {
  font-size: 1.3rem;
  margin-bottom: 8px;
  color: var(--text-primary);
  font-weight: 600;
}

.qr-card-desc {
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-bottom: 24px;
  min-height: 48px;
  line-height: 1.5;
}

.qr-image-wrapper {
  background: white;
  padding: 16px;
  display: inline-block;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  margin-bottom: 24px;
  transition: transform var(--transition-normal);
  max-width: 100%;
}

.qr-image-wrapper:hover {
  transform: scale(1.03);
}

.qr-image-wrapper img {
  width: 360px;
  height: auto;
  max-width: 100%;
  aspect-ratio: 1 / 1;
  display: block;
  border-radius: 8px;
}

@media (max-width: 768px) {
  .qr-grid {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 24px;
  }

  .qr-card {
    padding: 24px 16px;
  }

  .qr-card-title {
    font-size: 1.15rem;
  }

  .qr-card-desc {
    min-height: 0;
    font-size: 0.85rem;
  }

  .qr-image-wrapper {
    width: min(240px, 70vw);
    padding: 10px;
  }

  .qr-image-wrapper img {
    width: 100%;
  }
}

/* Animated Ambient Background Glows */
.bg-glow-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  pointer-events: none;
  overflow: hidden;
  background: var(--bg-primary);
}

.bg-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.22; /* Keep it subtle and extremely premium */
  mix-blend-mode: screen;
}

.blob-1 {
  top: -10%;
  left: 10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--accent) 0%, rgba(0, 0, 0, 0) 70%);
  animation: float-blob-1 25s infinite alternate ease-in-out;
}

.blob-2 {
  bottom: -10%;
  right: 10%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, var(--accent-blue) 0%, rgba(0, 0, 0, 0) 70%);
  animation: float-blob-2 30s infinite alternate ease-in-out;
}

.blob-3 {
  top: 40%;
  left: 50%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(139, 0, 55, 0.5) 0%, rgba(0, 0, 0, 0) 70%);
  animation: float-blob-3 20s infinite alternate ease-in-out;
}

@keyframes float-blob-1 {
  0% {
    transform: translate(0, 0) scale(1) rotate(0deg);
  }
  50% {
    transform: translate(120px, 80px) scale(1.15) rotate(180deg);
  }
  100% {
    transform: translate(-60px, 160px) scale(0.9) rotate(360deg);
  }
}

@keyframes float-blob-2 {
  0% {
    transform: translate(0, 0) scale(1) rotate(0deg);
  }
  50% {
    transform: translate(-140px, -100px) scale(0.9) rotate(-180deg);
  }
  100% {
    transform: translate(90px, -60px) scale(1.1) rotate(-360deg);
  }
}

@keyframes float-blob-3 {
  0% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(80px, -140px) scale(1.25);
  }
  100% {
    transform: translate(-90px, 80px) scale(0.85);
  }
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}