:root,
html[data-theme="dark"] {
  --bg-dark: #0b0f19;
  --bg-card: #131a2a;
  --bg-card-hover: #1a2338;
  --bg-input: #0e1422;
  --bg-header: rgba(11, 15, 25, 0.88);
  --border-color: #25314d;
  --border-highlight: #3b82f6;
  --text-main: #f1f5f9;
  --text-sub: #94a3b8;
  --text-muted: #64748b;
  --primary: #3b82f6;
  --primary-hover: #2563eb;
  --accent-cyan: #06b6d4;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f43f5e;
  --accent-purple: #8b5cf6;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.55);
}

html[data-theme="light"] {
  --bg-dark: #f8fafc;
  --bg-card: #ffffff;
  --bg-card-hover: #f1f5f9;
  --bg-input: #f1f5f9;
  --bg-header: rgba(255, 255, 255, 0.90);
  --border-color: #e2e8f0;
  --border-highlight: #2563eb;
  --text-main: #0f172a;
  --text-sub: #475569;
  --text-muted: #64748b;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --shadow-card: 0 10px 25px -8px rgba(15, 23, 42, 0.08);
}

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

body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color 0.2s, color 0.2s;
}

code,
pre,
.code-formula {
  font-family: 'JetBrains Mono', monospace;
}

.hidden {
  display: none !important;
}

/* ==========================================
   Top Header & Navigation
   ========================================== */
.top-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-header);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
}

.header-inner {
  max-width: 1440px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
}

.logo-icon {
  font-size: 2rem;
  background: linear-gradient(135deg, #3b82f6, #06b6d4);
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  color: #fff;
}

.logo-text h1 {
  font-size: 1.15rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.badge-version {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  background: rgba(59, 130, 246, 0.2);
  color: var(--primary);
  border: 1px solid rgba(59, 130, 246, 0.4);
  border-radius: 99px;
}

.logo-text p {
  font-size: 0.75rem;
  color: var(--text-sub);
}

.step-nav {
  display: flex;
  gap: 0.35rem;
  background: var(--bg-input);
  padding: 0.3rem;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.nav-tab {
  background: transparent;
  border: none;
  color: var(--text-sub);
  padding: 0.5rem 0.9rem;
  border-radius: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.nav-tab:hover {
  color: var(--text-main);
  background: rgba(59, 130, 246, 0.08);
}

.nav-tab.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 10px rgba(59, 130, 246, 0.35);
}

.step-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  opacity: 0.8;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ==========================================
   Buttons & Common Elements
   ========================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1.15rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.2s;
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #60a5fa, #3b82f6);
  transform: translateY(-1px);
}

.btn-secondary {
  background: rgba(6, 182, 212, 0.15);
  color: #0891b2;
  border-color: rgba(6, 182, 212, 0.4);
}

html[data-theme="dark"] .btn-secondary {
  color: #22d3ee;
}

.btn-secondary:hover {
  background: rgba(6, 182, 212, 0.25);
}

.btn-outline {
  background: var(--bg-card);
  color: var(--text-main);
  border-color: var(--border-color);
}

.btn-outline:hover {
  border-color: var(--primary);
  background: rgba(59, 130, 246, 0.1);
}

.btn-lg {
  padding: 0.8rem 1.5rem;
  font-size: 0.98rem;
}

.btn-sm {
  padding: 0.4rem 0.8rem;
  font-size: 0.8rem;
}

.btn-xs {
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
  border-radius: 6px;
}

/* ==========================================
   Layout & Cards
   ========================================== */
.main-container {
  max-width: 1440px;
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem;
  flex: 1;
}

.view-section {
  display: none;
  animation: fadeIn 0.25s ease-out;
}

.view-section.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.35rem;
  box-shadow: var(--shadow-card);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 1.25rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.stage-pill {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.12);
  padding: 0.2rem 0.6rem;
  border-radius: 99px;
  margin-bottom: 0.35rem;
}

.section-header h2 {
  font-size: 1.5rem;
  font-weight: 800;
}

.section-header p {
  color: var(--text-sub);
  font-size: 0.92rem;
  margin-top: 0.2rem;
}

.two-col-layout {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 1.25rem;
  align-items: start;
}

@media (max-width: 1100px) {
  .two-col-layout {
    grid-template-columns: 1fr;
  }
}

/* ==========================================
   Dashboard Section
   ========================================== */
.hero-banner {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 1.5rem;
  background: radial-gradient(circle at top right, rgba(59, 130, 246, 0.16), var(--bg-card));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 1024px) {
  .hero-banner {
    grid-template-columns: 1fr;
  }
}

.hero-pill {
  display: inline-block;
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.35);
  padding: 0.25rem 0.75rem;
  border-radius: 99px;
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 0.85rem;
}

.hero-content h2 {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.28;
  margin-bottom: 1rem;
}

.text-gradient {
  background: linear-gradient(90deg, #3b82f6, #06b6d4, #10b981);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  color: var(--text-sub);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
  line-height: 1.65;
}

.hero-cta-group {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.privacy-trust-bar {
  margin-top: 1rem;
  padding: 0.55rem 0.85rem;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid rgba(16, 185, 129, 0.25);
  border-radius: 8px;
  font-size: 0.78rem;
  color: var(--text-sub);
}

.hero-summary-card {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.25rem;
}

.summary-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-sub);
  margin-bottom: 0.9rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--border-color);
}

.status-dot.online {
  color: var(--accent-emerald);
  font-weight: 700;
  font-size: 0.75rem;
}

.pipeline-mini-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.pipe-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 0.75rem 1rem;
}

.pipe-item.highlight {
  border-color: rgba(59, 130, 246, 0.5);
  background: rgba(59, 130, 246, 0.08);
}

.pipe-title {
  font-size: 0.8rem;
  color: var(--text-sub);
  margin-bottom: 0.35rem;
}

.pipe-metrics {
  display: flex;
  justify-content: space-between;
  font-size: 0.86rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.pipe-score-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
}

.big-score {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary);
  font-family: 'JetBrains Mono', monospace;
}

.score-unit {
  font-size: 0.85rem;
  color: var(--text-sub);
  flex: 1;
}

.preset-showcase-card {
  margin-bottom: 1.5rem;
}

.preset-showcase-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.2rem;
}

.preset-showcase-card p {
  font-size: 0.85rem;
  color: var(--text-sub);
  margin-bottom: 1rem;
}

.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
}

.preset-btn {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 0.85rem;
  text-align: left;
  color: var(--text-main);
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.preset-btn:hover {
  border-color: var(--primary);
  background: var(--bg-card-hover);
}

.preset-btn.active {
  border-color: var(--primary);
  background: rgba(59, 130, 246, 0.14);
  box-shadow: 0 0 0 1px var(--primary);
}

.preset-tag {
  font-size: 0.7rem;
  color: var(--accent-cyan);
  font-weight: 700;
}

.preset-dims {
  font-size: 0.76rem;
  color: var(--text-sub);
  font-family: 'JetBrains Mono', monospace;
}

.formula-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1rem;
}

.formula-card {
  position: relative;
}

.formula-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  background: rgba(139, 92, 246, 0.16);
  color: var(--accent-purple);
  padding: 0.15rem 0.55rem;
  border-radius: 99px;
  margin-bottom: 0.5rem;
}

.formula-card h4 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.formula-card p {
  font-size: 0.84rem;
  color: var(--text-sub);
  margin-bottom: 0.75rem;
}

.code-formula {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  padding: 0.55rem 0.7rem;
  border-radius: 8px;
  font-size: 0.8rem;
  color: var(--primary);
  overflow-x: auto;
}

/* ==========================================
   Canvas & Controls (Stage 1 & Stage 2)
   ========================================== */
.canvas-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
  flex-wrap: wrap;
}

.toolbar-group {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.toolbar-hint {
  font-size: 0.78rem;
  color: var(--text-sub);
}

.frame-styler-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding: 0.55rem 0.85rem;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  margin-bottom: 0.85rem;
  flex-wrap: wrap;
}

.styler-group {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.styler-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-sub);
}

.color-swatch {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--border-color);
  cursor: pointer;
  transition: transform 0.15s, border-color 0.15s;
}

.color-swatch:hover,
.color-swatch.active {
  transform: scale(1.18);
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.35);
}

.canvas-wrapper {
  width: 100%;
  background: #070a12;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

canvas {
  max-width: 100%;
  height: auto;
  display: block;
}

.stage1-scale-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.6rem;
  margin-top: 0.85rem;
}

@media (max-width: 640px) {
  .stage1-scale-strip {
    grid-template-columns: repeat(2, 1fr);
  }
}

.strip-item {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.55rem 0.75rem;
  display: flex;
  flex-direction: column;
}

.strip-item.accent {
  border-color: var(--accent-cyan);
  background: rgba(6, 182, 212, 0.1);
}

.strip-label {
  font-size: 0.72rem;
  color: var(--text-sub);
}

.strip-item strong {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.92rem;
  color: var(--text-main);
}

.control-panel h3 {
  font-size: 1.05rem;
  margin-bottom: 0.9rem;
}

.form-group {
  margin-bottom: 0.85rem;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  color: var(--text-sub);
  margin-bottom: 0.35rem;
  font-weight: 500;
}

.form-control {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 0.55rem 0.75rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-family: inherit;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
}

.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.tof-panel {
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.35);
  border-radius: 10px;
  padding: 0.85rem;
  margin-bottom: 0.85rem;
}

.tof-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  margin-bottom: 0.6rem;
  color: var(--accent-purple);
}

.badge-conf {
  background: rgba(16, 185, 129, 0.2);
  color: #10b981;
  padding: 0.1rem 0.45rem;
  border-radius: 6px;
  font-size: 0.7rem;
  font-weight: 700;
}

.divider {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 1rem 0;
}

.spec-sliders {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.slider-group {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 9px;
  padding: 0.6rem 0.85rem;
}

.slider-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.3rem;
}

.slider-label-row label {
  font-size: 0.84rem;
  font-weight: 600;
}

.num-with-unit {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  font-size: 0.8rem;
  color: var(--text-sub);
}

.num-with-unit input {
  width: 68px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--primary);
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.2rem 0.4rem;
  border-radius: 5px;
  text-align: right;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--primary);
  cursor: pointer;
}

.fpd-callout {
  margin-top: 1rem;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(6, 182, 212, 0.12));
  border: 1px solid rgba(59, 130, 246, 0.4);
  border-radius: 10px;
  padding: 0.85rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.callout-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--primary);
}

.callout-formula {
  font-size: 0.76rem;
  color: var(--text-sub);
  margin-top: 0.15rem;
}

.callout-value {
  font-size: 1.4rem;
  font-weight: 800;
  font-family: 'JetBrains Mono', monospace;
  color: var(--primary);
}

/* ==========================================
   Stage 2 Specific Styles
   ========================================== */
.pose-alert-banner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.85rem 1.25rem;
  border-radius: 12px;
  margin-bottom: 1.15rem;
  border: 1px solid;
  flex-wrap: wrap;
  gap: 1rem;
}

.pose-alert-banner.valid {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.35);
}

.pose-alert-banner.invalid {
  background: rgba(244, 63, 94, 0.14);
  border-color: rgba(244, 63, 94, 0.45);
}

.pose-status-left {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.pose-icon {
  font-size: 1.5rem;
}

.pose-status-left p {
  font-size: 0.82rem;
  color: var(--text-sub);
}

.pose-metrics-right {
  display: flex;
  gap: 0.75rem;
}

.pose-chip {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 0.4rem 0.75rem;
  border-radius: 8px;
  font-size: 0.78rem;
  display: flex;
  flex-direction: column;
}

.pose-chip strong {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.92rem;
}

.mp-engine-status {
  font-size: 0.76rem;
  padding: 0.25rem 0.65rem;
  border-radius: 99px;
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  font-weight: 600;
}

.landmark-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 0.75rem;
  font-size: 0.76rem;
  color: var(--text-sub);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.dot.iris {
  background: #22d3ee;
}

.dot.zyg {
  background: #f59e0b;
}

.dot.mid {
  background: #10b981;
}

.dot.brow {
  background: #c084fc;
}

.dot.frame {
  background: #3b82f6;
}

.panel-header-with-badge {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.panel-header-with-badge h3 {
  margin-bottom: 0;
}

.scale-s2-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  background: rgba(59, 130, 246, 0.18);
  color: var(--primary);
  padding: 0.2rem 0.55rem;
  border-radius: 6px;
}

.face-preset-bar {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
  margin-bottom: 0.85rem;
  font-size: 0.78rem;
  color: var(--text-sub);
}

.btn-chip {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-sub);
  padding: 0.28rem 0.6rem;
  border-radius: 99px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-chip:hover,
.btn-chip.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* ==========================================
   Stage 3 Report Section
   ========================================== */
.report-top-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.35fr 0.95fr;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

@media (max-width: 1200px) {
  .report-top-grid {
    grid-template-columns: 1fr;
  }
}

.score-hero-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.score-badge-pill {
  font-size: 0.78rem;
  font-weight: 800;
  padding: 0.25rem 0.85rem;
  border-radius: 99px;
  background: rgba(16, 185, 129, 0.2);
  color: #10b981;
  margin-bottom: 0.75rem;
}

.score-circle-wrap {
  position: relative;
  width: 220px;
  height: 220px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.score-circle-Inner {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.score-big-num {
  font-size: 2.8rem;
  font-weight: 800;
  font-family: 'JetBrains Mono', monospace;
  line-height: 1;
}

.score-max {
  font-size: 0.82rem;
  color: var(--text-sub);
  margin-top: 0.25rem;
}

.score-summary-msg {
  font-size: 0.88rem;
  color: var(--text-sub);
  margin: 0.75rem 0 1rem;
}

.key-optical-chips {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem;
  width: 100%;
}

.opt-chip {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  padding: 0.5rem;
  border-radius: 8px;
  display: flex;
  flex-direction: column;
}

.opt-chip span {
  font-size: 0.72rem;
  color: var(--text-sub);
}

.opt-chip strong {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.92rem;
  color: var(--primary);
}

.metric-bar-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 0.85rem;
}

.metric-bar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.weight-tag {
  font-size: 0.72rem;
  color: var(--text-sub);
  background: var(--bg-input);
  padding: 0.1rem 0.45rem;
  border-radius: 4px;
  margin-left: 0.35rem;
}

.metric-score-val {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  color: var(--primary);
}

.progress-track {
  width: 100%;
  height: 10px;
  background: var(--bg-input);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 0.35rem;
}

.progress-fill {
  height: 100%;
  border-radius: 99px;
  transition: width 0.35s ease;
}

.progress-fill.fpd {
  background: linear-gradient(90deg, #3b82f6, #22d3ee);
}

.progress-fill.width {
  background: linear-gradient(90deg, #10b981, #34d399);
}

.progress-fill.vert {
  background: linear-gradient(90deg, #f59e0b, #fbbf24);
}

.progress-fill.vibe {
  background: linear-gradient(90deg, #8b5cf6, #c084fc);
}

.metric-detail-formula {
  font-size: 0.76rem;
  color: var(--text-sub);
  font-family: 'JetBrains Mono', monospace;
}

.radar-canvas-wrap {
  display: flex;
  justify-content: center;
  margin: 0.5rem 0;
}

.ideal-spec-box {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 0.85rem;
  margin-top: 0.5rem;
}

.ideal-spec-box h4 {
  font-size: 0.84rem;
  margin-bottom: 0.55rem;
  color: #10b981;
}

.ideal-spec-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.ideal-spec-grid div {
  display: flex;
  justify-content: space-between;
  font-size: 0.78rem;
  background: var(--bg-card);
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
}

.ideal-spec-grid strong {
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-main);
}

.rec-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 0.85rem;
}

.rec-list li {
  background: var(--bg-input);
  border-left: 4px solid var(--primary);
  padding: 0.75rem 1rem;
  border-radius: 0 8px 8px 0;
  font-size: 0.88rem;
}

.rec-list li.good {
  border-left-color: var(--accent-emerald);
}

.rec-list li.warn {
  border-left-color: var(--accent-amber);
}

.rec-list li.bad {
  border-left-color: var(--accent-rose);
}

.json-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.json-tabs {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 0.6rem;
}

.json-tab {
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-sub);
  padding: 0.35rem 0.75rem;
  border-radius: 6px;
  font-size: 0.78rem;
  cursor: pointer;
}

.json-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.json-code-box {
  background: #070a12;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1rem;
  font-size: 0.8rem;
  color: #a5f3fc;
  overflow-x: auto;
  max-height: 360px;
}

/* ==========================================
   Mobile Bottom Navigation Bar
   ========================================== */
.mobile-bottom-nav {
  display: none;
}

@media (max-width: 768px) {
  .step-nav {
    display: none;
  }

  body {
    padding-bottom: 70px;
  }

  .mobile-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 200;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    background: var(--bg-header);
    backdrop-filter: blur(16px);
    border-top: 1px solid var(--border-color);
    padding: 0.35rem 0.5rem calc(0.35rem + env(safe-area-inset-bottom));
  }

  .mob-nav-item {
    background: transparent;
    border: none;
    color: var(--text-sub);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.15rem;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.35rem 0;
    border-radius: 8px;
    cursor: pointer;
  }

  .mob-nav-item.active {
    color: var(--primary);
  }

  .mob-icon {
    font-size: 1.15rem;
  }

  .hero-content h2 {
    font-size: 1.45rem;
  }
}

.app-footer {
  border-top: 1px solid var(--border-color);
  padding: 1.5rem 1.25rem;
  font-size: 0.8rem;
  color: var(--text-sub);
  margin-top: 2rem;
}

.footer-inner {
  max-width: 1360px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
  text-align: center;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  align-items: center;
}

.footer-brand strong {
  color: var(--text-main);
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  justify-content: center;
  align-items: center;
}

.footer-link-btn,
.footer-links a {
  background: transparent;
  border: none;
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
  padding: 0;
}

.footer-link-btn:hover,
.footer-links a:hover {
  color: var(--accent-cyan);
}

/* ==========================================
   Lucide Icons & Utility Alignment
   ========================================== */
.icon-xs {
  width: 14px;
  height: 14px;
  vertical-align: -2px;
  margin-right: 3px;
}

.icon-sm {
  width: 17px;
  height: 17px;
  vertical-align: -3px;
  margin-right: 4px;
}

.brand-svg-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.35);
}

/* ==========================================
   Ad Monetization Slots (Google AdSense / Kakao AdFit)
   ========================================== */
.ad-slot-container {
  background: var(--bg-card);
  border: 1px dashed var(--border-highlight);
  border-radius: var(--radius-md);
  padding: 0.65rem 1rem;
  margin-bottom: 1.25rem;
  transition: all 0.25s ease;
}

.ad-slot-container.hidden-ad {
  display: none !important;
}

.ad-badge-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.45rem;
}

.ad-label {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.12rem 0.45rem;
  border-radius: 4px;
  background: rgba(148, 163, 184, 0.16);
  color: var(--text-sub);
}

.ad-label.native {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
}

.ad-network-hint {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.ad-banner-body {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  background: linear-gradient(90deg, rgba(59, 130, 246, 0.08), rgba(6, 182, 212, 0.08));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
}

.ad-banner-left {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.ad-sample-thumb {
  width: 52px;
  height: 52px;
  border-radius: 10px;
  object-fit: cover;
  border: 1px solid var(--border-color);
  flex-shrink: 0;
}

.ad-sample-copy {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.ad-sample-copy strong {
  font-size: 0.9rem;
  color: var(--text-main);
}

.ad-sample-copy p {
  font-size: 0.78rem;
  color: var(--text-sub);
  margin: 0;
}

.ad-cta-btn {
  flex-shrink: 0;
  text-decoration: none;
  background: var(--primary);
  color: #ffffff;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 0.5rem 0.9rem;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: background 0.2s;
}

.ad-cta-btn:hover {
  background: var(--primary-hover);
}

/* ==========================================
   Hero Right Visual SVG & Formula Pills
   ========================================== */
.hero-visual-right {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: stretch;
}

.hero-svg-illust {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-card);
  align-self: center;
}

/* ==========================================
   Preset Eyewear SVG Mini Thumbnails
   ========================================== */
.preset-svg-wrap {
  width: 100%;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  margin-bottom: 0.2rem;
}

.frame-mini-svg {
  width: 92px;
  height: 34px;
}

/* ==========================================
   Unsplash Free Eyewear Lookbook Gallery
   ========================================== */
.lookbook-card {
  margin-bottom: 1.5rem;
}

.lookbook-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 0.75rem;
}

@media (max-width: 900px) {
  .lookbook-grid {
    grid-template-columns: 1fr;
  }
}

.look-item {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, border-color 0.2s;
}

.look-item:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
}

.look-img-wrap {
  position: relative;
  height: 165px;
  overflow: hidden;
}

.look-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.look-item:hover .look-img-wrap img {
  transform: scale(1.04);
}

.look-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(15, 23, 42, 0.82);
  backdrop-filter: blur(6px);
  color: #38bdf8;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  border: 1px solid rgba(56, 189, 248, 0.35);
}

.look-info {
  padding: 0.9rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.look-info h4 {
  font-size: 0.92rem;
  color: var(--text-main);
}

.look-info p {
  font-size: 0.78rem;
  color: var(--text-sub);
  line-height: 1.45;
}

/* ==========================================
   Affiliate Curation Ad Section (Stage 3)
   ========================================== */
.affiliate-curation-card {
  margin-bottom: 1.5rem;
  border-color: rgba(16, 185, 129, 0.35);
}

.affiliate-products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 0.65rem;
}

@media (max-width: 920px) {
  .affiliate-products-grid {
    grid-template-columns: 1fr;
  }
}

.aff-product-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.aff-img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  border-bottom: 1px solid var(--border-color);
}

.aff-body {
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  flex: 1;
}

.aff-match-tag {
  align-self: flex-start;
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--accent-emerald);
  background: rgba(16, 185, 129, 0.14);
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
}

.aff-body h4 {
  font-size: 0.9rem;
  color: var(--text-main);
  margin-top: 0.15rem;
}

.aff-spec {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
}

.aff-price-row {
  margin-top: auto;
  padding-top: 0.55rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.aff-price {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text-main);
  font-family: var(--font-mono);
}

.aff-buy-btn {
  text-decoration: none;
  background: var(--primary);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.4rem 0.75rem;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.aff-buy-btn:hover {
  background: var(--primary-hover);
}

.affiliate-disclaimer {
  margin-top: 0.75rem;
  font-size: 0.72rem;
  color: var(--text-muted);
  text-align: right;
}

/* ==========================================
   SEO Optical Knowledge Base (#sec-optical-guide)
   ========================================== */
.seo-guide-section {
  max-width: 1360px;
  margin: 1rem auto 2rem;
  padding: 0 1.5rem;
}

.seo-articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 0.75rem;
}

@media (max-width: 920px) {
  .seo-articles-grid {
    grid-template-columns: 1fr;
  }
}

.seo-article {
  background: var(--bg-elevated);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.15rem;
}

.seo-article h4 {
  font-size: 0.92rem;
  color: var(--accent-cyan);
  margin-bottom: 0.45rem;
}

.seo-article p {
  font-size: 0.8rem;
  color: var(--text-sub);
  line-height: 1.6;
}

/* ==========================================
   Privacy / Terms Legal Modal
   ========================================== */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(2, 6, 23, 0.75);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-backdrop.hidden {
  display: none !important;
}

.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  max-width: 620px;
  width: 100%;
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.modal-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h3 {
  font-size: 1rem;
  color: var(--text-main);
}

.modal-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  max-height: 70vh;
  overflow-y: auto;
}

.modal-body h4 {
  font-size: 0.88rem;
  color: var(--accent-cyan);
  margin-top: 0.25rem;
}

.modal-body p {
  font-size: 0.82rem;
  color: var(--text-sub);
  line-height: 1.55;
}

@media (max-width: 640px) {
  .ad-banner-body {
    flex-direction: column;
    align-items: flex-start;
  }
  .ad-cta-btn {
    width: 100%;
    justify-content: center;
  }
}