/* DrMarkit.com — High-Tech Dark Mode Stylesheet (Pure HTML/CSS First) */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  --bg: #070913;
  --bg-subtle: #0d1224;
  --bg-card: rgba(17, 24, 43, 0.7);
  --bg-card-hover: rgba(23, 33, 59, 0.85);
  --border: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(6, 182, 212, 0.35);
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.25);
  --accent-blue: #3b82f6;
  --accent-blue-deep: #1d4ed8;
  --accent-emerald: #10b981;
  --accent-emerald-glow: rgba(16, 185, 129, 0.25);
  --accent-rose: #f43f5e;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --max-w: 1200px;
  --transition: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

/* Background Atmosphere */
.bg-glow-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(6, 182, 212, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 85% 25%, rgba(59, 130, 246, 0.14) 0%, transparent 45%),
    radial-gradient(circle at 50% 70%, rgba(16, 185, 129, 0.08) 0%, transparent 50%),
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 100% 100%, 48px 48px, 48px 48px;
}

.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography */
.text-gradient {
  background: linear-gradient(135deg, #ffffff 30%, #93c5fd 70%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-gradient-cyan {
  background: linear-gradient(135deg, #38bdf8 0%, #06b6d4 50%, #10b981 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(7, 9, 19, 0.85);
  border-bottom: 1px solid var(--border);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #06b6d4, #3b82f6);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px var(--accent-cyan-glow);
}

.brand-badge {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(59, 130, 246, 0.18);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.925rem;
  font-weight: 500;
  transition: color var(--transition);
}

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

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

/* Language Switcher (Native Dropdown) */
.lang-select-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.lang-select {
  appearance: none;
  -webkit-appearance: none;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 7px 28px 7px 12px;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 0.825rem;
  font-weight: 500;
  cursor: pointer;
  outline: none;
  transition: border-color var(--transition);
}

.lang-select:hover, .lang-select:focus {
  border-color: var(--accent-cyan);
}

.lang-arrow {
  position: absolute;
  right: 10px;
  pointer-events: none;
  color: var(--text-muted);
  width: 12px;
  height: 12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.925rem;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: 999px;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, #06b6d4 0%, #2563eb 100%);
  color: #ffffff;
  box-shadow: 0 4px 20px rgba(6, 182, 212, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(6, 182, 212, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

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

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
}

/* Hero Section */
.hero {
  padding: 80px 0 60px;
  position: relative;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-badge-wrap {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.25);
  border-radius: 999px;
  margin-bottom: 24px;
  font-size: 0.85rem;
  font-weight: 500;
  color: #38bdf8;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-emerald);
  box-shadow: 0 0 10px var(--accent-emerald);
  animation: pulse-dot-anim 2s infinite;
}

@keyframes pulse-dot-anim {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.3); }
}

.hero h1 {
  font-size: clamp(2.5rem, 4.5vw, 4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-lead {
  font-size: 1.15rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 36px;
  max-width: 580px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-bottom: 36px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.metric-item strong {
  display: block;
  font-size: 1.75rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--text-primary);
  line-height: 1.2;
}

.metric-item span {
  font-size: 0.825rem;
  color: var(--text-muted);
}

/* Scanner Simulation Card */
.scanner-stage {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 24px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 40px rgba(6, 182, 212, 0.1);
  backdrop-filter: blur(12px);
}

.scanner-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.scanner-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.825rem;
  font-family: var(--font-mono);
  color: var(--accent-emerald);
}

.scanner-sheet {
  background: #ffffff;
  color: #0f172a;
  border-radius: var(--radius-md);
  padding: 20px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
}

.scan-laser {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, #06b6d4, #10b981, transparent);
  box-shadow: 0 0 18px 4px rgba(6, 182, 212, 0.7);
  animation: laser-scan 3.2s ease-in-out infinite;
  z-index: 10;
  pointer-events: none;
}

@keyframes laser-scan {
  0% { top: 0%; opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

.sheet-header-mock {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
  border-bottom: 2px solid #e2e8f0;
  padding-bottom: 10px;
}

.sheet-title-mock h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #1e293b;
}

.sheet-title-mock p {
  font-size: 0.75rem;
  color: #64748b;
}

.sheet-qr-mock {
  width: 44px;
  height: 44px;
  border: 2px solid #0f172a;
  padding: 3px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.qr-pixel {
  background-color: #0f172a;
  border-radius: 1px;
}

/* Bubbles Grid */
.sheet-bubbles-mock {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.bubble-row {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  color: #475569;
}

.row-num {
  width: 20px;
  font-family: var(--font-mono);
}

.bubbles-group {
  display: flex;
  gap: 6px;
}

.bubble {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1.5px solid #cbd5e1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: #64748b;
}

.bubble.filled {
  background-color: #1e293b;
  border-color: #1e293b;
  color: #ffffff;
}

.bubble.correct {
  background-color: #dcfce7;
  border-color: #16a34a;
  color: #15803d;
  box-shadow: 0 0 8px rgba(22, 163, 74, 0.4);
}

.bubble.wrong {
  background-color: #fee2e2;
  border-color: #dc2626;
  color: #b91c1c;
}

/* Floating Results Card */
.scanner-overlay-result {
  margin-top: 18px;
  background: rgba(13, 18, 36, 0.9);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.result-badge {
  display: flex;
  align-items: center;
  gap: 12px;
}

.result-score {
  font-size: 1.5rem;
  font-weight: 800;
  font-family: var(--font-mono);
  color: #38bdf8;
}

.result-details {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* Bento Grid Features */
.features-section {
  padding: 100px 0;
  position: relative;
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
  backdrop-filter: blur(10px);
}

.bento-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-4px);
}

.bento-card.col-8 { grid-column: span 8; }
.bento-card.col-4 { grid-column: span 4; }
.bento-card.col-6 { grid-column: span 6; }
.bento-card.col-12 { grid-column: span 12; }

.bento-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.bento-icon.cyan {
  background: rgba(6, 182, 212, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.bento-icon.blue {
  background: rgba(59, 130, 246, 0.15);
  color: var(--accent-blue);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.bento-icon.emerald {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.bento-title {
  font-size: 1.35rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.bento-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Comparison Table */
.comparison-section {
  padding: 80px 0;
  background: linear-gradient(180deg, transparent 0%, rgba(13, 18, 36, 0.5) 50%, transparent 100%);
}

.comp-table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.comp-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
}

.comp-row {
  display: contents;
}

.comp-cell {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
  display: flex;
  align-items: center;
}

.comp-header {
  font-weight: 700;
  background: rgba(255, 255, 255, 0.03);
  font-size: 1rem;
}

.comp-header.target {
  background: rgba(6, 182, 212, 0.1);
  color: #38bdf8;
  border-top: 2px solid var(--accent-cyan);
}

.comp-cell.feature-name {
  font-weight: 600;
  color: var(--text-primary);
}

.comp-cell.old-way {
  color: var(--text-muted);
  background: rgba(244, 63, 94, 0.02);
}

.comp-cell.new-way {
  font-weight: 600;
  color: #38bdf8;
  background: rgba(6, 182, 212, 0.05);
}

/* Native HTML <details> FAQ Accordion (Zero JS) */
.faq-section {
  padding: 90px 0;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 800px;
  margin: 0 auto;
}

details.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color var(--transition);
}

details.faq-item[open] {
  border-color: rgba(6, 182, 212, 0.45);
}

summary.faq-trigger {
  padding: 20px 24px;
  list-style: none;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
}

summary.faq-trigger::-webkit-details-marker {
  display: none;
}

.faq-icon {
  width: 20px;
  height: 20px;
  transition: transform var(--transition);
  color: var(--text-muted);
  flex-shrink: 0;
}

details[open] summary .faq-icon {
  transform: rotate(180deg);
  color: var(--accent-cyan);
}

.faq-content {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* Final CTA Banner */
.cta-banner {
  padding: 80px 0 120px;
  position: relative;
}

.cta-inner {
  background: radial-gradient(circle at top right, rgba(6, 182, 212, 0.25), transparent 60%),
              linear-gradient(135deg, #0f172a 0%, #070913 100%);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-xl);
  padding: 60px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
}

.cta-inner h2 {
  font-size: clamp(2.2rem, 3.8vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.cta-inner p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 36px;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  font-size: 0.875rem;
  color: var(--text-muted);
  background: rgba(7, 9, 19, 0.95);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--transition);
}

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

/* Mobile Responsiveness */
@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .bento-card.col-8,
  .bento-card.col-4,
  .bento-card.col-6 {
    grid-column: span 12;
  }
  .comp-grid {
    grid-template-columns: 1.2fr 1fr 1fr;
    font-size: 0.85rem;
  }
  .comp-cell {
    padding: 14px 16px;
  }
  .nav-links {
    display: none;
  }
}

@media (max-width: 640px) {
  .hero-metrics {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .comp-table-wrap {
    overflow-x: auto;
  }
  .comp-grid {
    min-width: 520px;
  }
  .hero-cta-group {
    flex-direction: column;
    align-items: stretch;
  }
}