/* ==========================================================================
   "디자인 공학과 김태린" — Digital Catalog & Automotive Design Archive Stylesheet
   - Full-bleed 16:9 Cinematic Visuals
   - Before/After Wireframe & Render Split Slider
   - 360° Turntable Interactive Viewer
   - Class-A Surfacing Zebra Stripe Inspector
   - 1:1 Tape Drawing Packaging Dimension Overlay
   - Process Sketchbook with Interactive Magnifier (루페 돋보기)
   - Editorial Typography & High-End Automotive Dark Luxury Theme
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* High-End Automotive Obsidian & Titanium Color Palette */
  --bg-dark: #0a0b10;
  --bg-darker: #050608;
  --bg-surface: #11131a;
  --bg-card: rgba(17, 19, 28, 0.75);
  --bg-card-hover: rgba(26, 29, 44, 0.9);
  --bg-glass: rgba(255, 255, 255, 0.04);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glass-bright: rgba(255, 255, 255, 0.22);

  /* Performance Accents */
  --accent-cyan: #00f2fe;        /* Telemetry & Blueprint Cyan */
  --accent-orange: #ff6b00;      /* Aero Downforce Amber */
  --accent-red: #ff3b30;         /* DRL Taillight Red */
  --accent-purple: #a855f7;      /* Biophilic Interior Violet */
  --accent-titanium: #c4cbd4;    /* Brushed Titanium Metal */

  /* Text Colors */
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  /* Gradients */
  --grad-primary: linear-gradient(135deg, #00f2fe 0%, #4facfe 50%, #6366f1 100%);
  --grad-aero: linear-gradient(135deg, #00f2fe 0%, #ff6b00 100%);
  --grad-accent: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
  --grad-glow: radial-gradient(circle, rgba(0, 242, 254, 0.12) 0%, transparent 70%);

  /* Typography */
  --font-heading: 'Space Grotesk', -apple-system, sans-serif;
  --font-body: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Transitions & Shadows */
  --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-glow-cyan: 0 0 25px rgba(0, 242, 254, 0.25);
  --shadow-glow-orange: 0 0 25px rgba(255, 107, 0, 0.3);
  --shadow-card: 0 12px 35px -10px rgba(0, 0, 0, 0.65);
}

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

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

body {
  font-family: var(--font-body);
  color: var(--text-main);
  background-color: var(--bg-dark);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* Custom Interactive Cursor Glow */
#cursor-glow {
  position: fixed;
  top: 0;
  left: 0;
  width: 480px;
  height: 480px;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.06) 0%, rgba(255, 107, 0, 0.03) 40%, transparent 70%);
  transform: translate(-50%, -50%);
  z-index: 1;
  transition: width 0.3s, height 0.3s;
}

/* Navigation Bar */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  z-index: 1000;
  background: rgba(10, 11, 16, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  transition: var(--transition-smooth);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
}

.nav-logo-icon {
  font-size: 1.5rem;
  color: var(--accent-cyan);
  text-shadow: 0 0 12px rgba(0, 242, 254, 0.6);
}

.brand-title-group {
  display: flex;
  flex-direction: column;
}

.brand-main {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--accent-cyan);
}

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

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: var(--transition-smooth);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-main);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--grad-primary);
  border-radius: 2px;
  box-shadow: 0 0 10px var(--accent-cyan);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Global Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 8px;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: 1px solid transparent;
  text-decoration: none;
}

.btn-primary {
  background: var(--grad-primary);
  color: #050608;
  box-shadow: 0 4px 18px rgba(0, 242, 254, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 242, 254, 0.55);
}

.btn-glass {
  background: var(--bg-glass);
  color: var(--text-main);
  border-color: var(--border-glass-bright);
  backdrop-filter: blur(12px);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--text-main);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 0.82rem;
}

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

.text-gradient-purple {
  background: var(--grad-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Section Header Shared */
.section-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 50px auto;
  padding: 0 20px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.08);
  border: 1px solid rgba(0, 242, 254, 0.2);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 14px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  color: var(--text-main);
}

.section-desc {
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* ==========================================================================
   1. Hero Section (Full-Bleed 16:9 Showcase with Clear Car Stage)
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  padding: 100px 48px 30px 48px;
  pointer-events: none;
}

#hero-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: auto;
}

/* Top Frame: Clean Editorial Brand & Telemetry HUD (Does NOT obscure car) */
.hero-top-frame {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  pointer-events: none;
}

.hero-brand-group {
  max-width: 680px;
  pointer-events: auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--accent-cyan);
  background: rgba(10, 13, 20, 0.85);
  border: 1px solid rgba(0, 242, 254, 0.25);
  padding: 4px 14px;
  border-radius: 30px;
  margin-bottom: 12px;
  backdrop-filter: blur(10px);
}

.hero-badge-pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background-color: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(1.85rem, 3.2vw, 2.85rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
  text-shadow: 0 4px 25px rgba(0, 0, 0, 0.9);
  color: #fff;
}

.hero-title-sub {
  display: block;
  font-size: clamp(0.95rem, 1.4vw, 1.15rem);
  font-weight: 500;
  color: #cbd5e1;
  margin-top: 6px;
  font-style: italic;
}

.hero-subtitle {
  font-size: 0.86rem;
  color: var(--text-muted);
  max-width: 560px;
  line-height: 1.55;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.8);
}

/* Right Side: Compact Telemetry HUD Cards */
.hero-telemetry-hud {
  display: flex;
  gap: 12px;
  pointer-events: auto;
}

.telemetry-hud-card {
  background: rgba(14, 16, 26, 0.78);
  border: 1px solid var(--border-glass-bright);
  backdrop-filter: blur(16px);
  padding: 12px 16px;
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 135px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
  transition: var(--transition-smooth);
}

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

.t-hud-header {
  display: flex;
  align-items: center;
  gap: 6px;
}

.t-hud-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
}

.t-hud-title {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

.t-hud-val {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
}

.t-hud-sub {
  font-size: 0.7rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
}

/* Center Stage: Completely Clear for the Show Car & Wind Tunnel Streamlines */
.hero-center-spacer {
  flex-grow: 1;
  min-height: 280px;
  pointer-events: none;
}

/* Bottom Frame: Action Dock & Controls */
.hero-bottom-dock {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  pointer-events: none;
}


.hero-cta-group {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  pointer-events: auto;
}

.hero-hint-pill {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-cyan);
  background: rgba(10, 13, 20, 0.85);
  border: 1px solid rgba(0, 242, 254, 0.2);
  padding: 4px 16px;
  border-radius: 20px;
  backdrop-filter: blur(8px);
  pointer-events: auto;
}

.hero-scroll-indicator {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-dim);
  letter-spacing: 0.15em;
  animation: bounceDown 2s infinite ease-in-out;
  pointer-events: auto;
}

@keyframes bounceDown {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(4px); }
}

/* Quick Teaser Strip */
.quick-teaser-strip {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  background: rgba(14, 16, 24, 0.9);
  border-top: 1px solid var(--border-glass);
  border-bottom: 1px solid var(--border-glass);
  padding: 18px 40px;
}

.teaser-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.88rem;
}

.teaser-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
}

.teaser-val {
  color: #e2e8f0;
  font-weight: 500;
}

.teaser-link {
  color: var(--accent-cyan);
  text-decoration: none;
  font-weight: 600;
  font-family: var(--font-mono);
}

.teaser-link:hover {
  text-decoration: underline;
}

/* ==========================================================================
   1-B. Featured Projects (대표 쇼카 3~4개)
   ========================================================================== */
.featured-section {
  padding: 100px 40px;
  max-width: 1400px;
  margin: 0 auto;
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.featured-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 14px;
  overflow: hidden;
  transition: var(--transition-smooth);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.featured-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent-cyan);
  box-shadow: 0 16px 40px rgba(0, 242, 254, 0.2);
}

.featured-visual-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9; /* 16:9 와이드 비율 고정 */
  background: #08090d;
  overflow: hidden;
}

.featured-badge-class {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(0, 0, 0, 0.75);
  border: 1px solid rgba(0, 242, 254, 0.4);
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 4px 10px;
  border-radius: 4px;
  z-index: 5;
}

.featured-canvas-box {
  width: 100%;
  height: 100%;
}

.featured-canvas-box canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.featured-hover-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 242, 254, 0.15);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition-smooth);
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
}

.featured-card:hover .featured-hover-overlay {
  opacity: 1;
}

.featured-meta {
  padding: 22px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.meta-row-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.cat-code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
  font-weight: 600;
}

.cat-tag {
  font-size: 0.78rem;
  color: var(--text-dim);
}

.featured-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.featured-subtitle {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 16px;
  flex-grow: 1;
}

.spec-pills-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.pill-spec {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: #cbd5e1;
  background: rgba(255, 255, 255, 0.06);
  padding: 3px 8px;
  border-radius: 4px;
}

/* ==========================================================================
   2. Projects / Portfolio Archive Section
   ========================================================================== */
#works {
  padding: 100px 40px;
  max-width: 1400px;
  margin: 0 auto;
}

.catalog-toolbar {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  padding: 16px 20px;
  margin-bottom: 36px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.catalog-categories {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.filter-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: 6px;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-smooth);
}

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

.filter-btn.active {
  background: var(--grad-primary);
  color: #06080e;
  font-weight: 700;
  border-color: transparent;
  box-shadow: 0 2px 12px rgba(0, 242, 254, 0.3);
}

.catalog-search-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.catalog-search-box input {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-glass-bright);
  color: #fff;
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 0.85rem;
  width: 240px;
  outline: none;
  transition: var(--transition-smooth);
}

.catalog-search-box input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 10px rgba(0, 242, 254, 0.3);
}

/* Works Gallery Grid */
.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.work-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition-smooth);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}

.work-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-card);
}

.card-visual {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9; /* 16:9 비주얼 비율 */
  background: #080a0f;
  overflow: hidden;
}

.card-canvas-wrap {
  width: 100%;
  height: 100%;
}

.card-canvas-wrap canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.card-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.card-catalog-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(0, 0, 0, 0.8);
  border: 1px solid rgba(0, 242, 254, 0.3);
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: 4px;
  z-index: 2;
}

.card-delete-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(220, 38, 38, 0.22);
  border: 1px solid rgba(248, 113, 113, 0.45);
  color: #fca5a5;
  font-family: var(--font-heading);
  font-size: 0.74rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  z-index: 5;
  backdrop-filter: blur(8px);
  transition: var(--transition-smooth);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.card-delete-badge:hover {
  background: #ef4444;
  color: #ffffff;
  border-color: #f87171;
  transform: scale(1.08);
  box-shadow: 0 4px 16px rgba(239, 68, 68, 0.5);
}

.card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.card-category-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-orange);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.card-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 14px;
  flex-grow: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag-pill {
  font-size: 0.7rem;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.04);
  padding: 2px 6px;
  border-radius: 4px;
}

/* Works Index Table View */
.works-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border-glass);
}

.works-table th,
.works-table td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--border-glass);
  font-size: 0.88rem;
}

.works-table th {
  background: rgba(255, 255, 255, 0.03);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
  letter-spacing: 0.08em;
}

.works-table tr:hover td {
  background: rgba(0, 242, 254, 0.05);
  cursor: pointer;
}

/* ==========================================================================
   3. Process / Sketchbook Section (원초적 스케치 능력 아카이브)
   ========================================================================== */
.sketchbook-section {
  padding: 100px 40px;
  max-width: 1400px;
  margin: 0 auto;
}

.sketch-filters {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.sketchbook-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 40px;
}

.sketchbook-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition-smooth);
}

.sketchbook-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-cyan);
}

/* Interactive Magnifier Viewport */
.sketch-visual-box {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  background: #151822;
  overflow: hidden;
  cursor: crosshair;
}

.sketch-canvas-art {
  width: 100%;
  height: 100%;
  display: block;
}

/* Magnifier Lens */
.sketch-magnifier-lens {
  position: absolute;
  width: 130px;
  height: 130px;
  border: 2px solid var(--accent-cyan);
  border-radius: 50%;
  box-shadow: 0 0 20px rgba(0, 242, 254, 0.5), inset 0 0 15px rgba(0, 0, 0, 0.7);
  pointer-events: none;
  display: none;
  background-repeat: no-repeat;
  z-index: 10;
}

.sketch-card-body {
  padding: 18px 20px;
}

.sketch-cat-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent-cyan);
  text-transform: uppercase;
}

.sketch-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin: 4px 0 6px 0;
}

.sketch-technique {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-orange);
  margin-bottom: 8px;
}

.sketch-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Sketch Banner Strip */
.sketch-banner {
  background: rgba(18, 22, 34, 0.8);
  border: 1px solid var(--border-glass-bright);
  border-radius: 12px;
  padding: 26px 36px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.sketch-banner-content h4 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: #fff;
  margin-bottom: 6px;
}

.sketch-banner-content p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.sketch-banner-stats {
  display: flex;
  gap: 28px;
}

.s-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.s-stat strong {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  color: var(--accent-cyan);
}

.s-stat span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
}

/* ==========================================================================
   4. Design Engineering Lab (Wind Tunnel Simulation)
   ========================================================================== */
#playground {
  padding: 100px 40px;
  max-width: 1400px;
  margin: 0 auto;
}

.playground-container {
  display: grid;
  grid-template-columns: 2.2fr 1fr;
  gap: 30px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 28px;
  box-shadow: var(--shadow-card);
}

.playground-canvas-area {
  position: relative;
  background: #07080d;
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  overflow: hidden;
  min-height: 440px;
}

#playground-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.playground-status-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-cyan);
  background: rgba(0, 0, 0, 0.7);
  padding: 4px 10px;
  border-radius: 4px;
  border: 1px solid rgba(0, 242, 254, 0.3);
}

.playground-controls {
  display: flex;
  flex-direction: column;
  gap: 20px;
  justify-content: center;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.control-label {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.control-val {
  font-family: var(--font-mono);
  color: var(--accent-cyan);
  font-weight: 600;
}

input[type="range"] {
  accent-color: var(--accent-cyan);
  background: rgba(255, 255, 255, 0.1);
  height: 6px;
  border-radius: 3px;
  cursor: pointer;
}

.select-custom {
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid var(--border-glass-bright);
  color: #fff;
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 0.88rem;
  outline: none;
}

.playground-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 10px;
}

/* ==========================================================================
   5. About Creator Section & Tool Stack
   ========================================================================== */
#about {
  padding: 100px 40px;
  max-width: 1400px;
  margin: 0 auto;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 48px;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 48px;
}

.about-vision-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-orange);
  letter-spacing: 0.12em;
  margin-bottom: 8px;
}

.about-text h3 {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  color: #fff;
  margin-bottom: 18px;
  line-height: 1.3;
}

.about-text p {
  color: var(--text-muted);
  font-size: 0.98rem;
  line-height: 1.8;
  margin-bottom: 16px;
}

/* Tool Stack Proficiency */
.tool-stack-container {
  margin-top: 28px;
}

.tool-stack-heading {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
  letter-spacing: 0.12em;
  margin-bottom: 14px;
}

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

.tool-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  border-radius: 8px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.tool-cat {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-dim);
}

.tool-card strong {
  font-size: 0.85rem;
  color: #fff;
}

.tool-bar {
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  margin: 6px 0;
  overflow: hidden;
}

.tool-fill {
  height: 100%;
  background: var(--grad-primary);
  border-radius: 2px;
}

.tool-level {
  font-size: 0.7rem;
  color: var(--text-dim);
}

/* Timeline */
.timeline-container {
  margin-top: 28px;
}

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

.timeline-list li {
  display: flex;
  gap: 16px;
  border-left: 2px solid var(--accent-cyan);
  padding-left: 14px;
}

.t-year {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.t-content strong {
  font-size: 0.9rem;
  color: #fff;
  display: block;
}

.t-content p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  align-content: start;
}

.stat-box {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  border-radius: 12px;
  padding: 24px;
  text-align: center;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--accent-cyan);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   6. Contact Section
   ========================================================================== */
#contact {
  padding: 100px 40px;
  max-width: 900px;
  margin: 0 auto;
}

.contact-container {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 48px;
  text-align: center;
}

.contact-email-box {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid var(--border-glass-bright);
  padding: 8px 18px;
  border-radius: 30px;
  margin: 24px 0;
}

#contact-email-text {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: #fff;
}

.social-links {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 32px;
}

.social-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: var(--transition-smooth);
}

.social-btn:hover {
  background: var(--accent-cyan);
  color: #06080e;
  transform: translateY(-3px);
  box-shadow: 0 4px 16px rgba(0, 242, 254, 0.4);
}

.quick-contact-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
  text-align: left;
  margin-top: 20px;
}

.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.quick-contact-form input,
.quick-contact-form textarea {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-glass-bright);
  color: #fff;
  padding: 12px 16px;
  border-radius: 8px;
  font-size: 0.9rem;
  outline: none;
  font-family: var(--font-body);
}

.quick-contact-form input:focus,
.quick-contact-form textarea:focus {
  border-color: var(--accent-cyan);
}

.form-submit-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.form-status-msg {
  font-size: 0.85rem;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
}

/* Footer */
footer {
  text-align: center;
  padding: 40px;
  border-top: 1px solid var(--border-glass);
  color: var(--text-dim);
  font-size: 0.85rem;
}

/* ==========================================================================
   Modals & Case Study Spread Viewer (#catalog-detail-modal)
   ========================================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(6, 7, 12, 0.88);
  backdrop-filter: blur(16px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 30px;
  overflow-y: auto;
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background: #0f1118;
  border: 1px solid var(--border-glass-bright);
  border-radius: 16px;
  width: 100%;
  max-width: 1100px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.85);
  animation: modalEnter 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalEnter {
  from { opacity: 0; transform: scale(0.96) translateY(20px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 24px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border-glass);
  color: #fff;
  font-size: 1.5rem;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
  transition: var(--transition-smooth);
}

.modal-close-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: rotate(90deg);
}

/* Case Study Spread Header */
.catalog-spread-header {
  padding: 32px 36px 20px 36px;
  border-bottom: 1px solid var(--border-glass);
}

.catalog-meta-badges {
  display: flex;
  gap: 8px;
  margin-bottom: 10px;
}

.catalog-no-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: var(--accent-cyan);
  color: #06080e;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 4px;
}

.catalog-category-badge,
.catalog-year-badge,
.catalog-class-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  padding: 3px 8px;
  border-radius: 4px;
}

.catalog-modal-title {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.catalog-modal-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
}

/* Spread Navigation Tabs (6단계 순서) */
.spread-nav-tabs {
  display: flex;
  gap: 4px;
  background: rgba(0, 0, 0, 0.35);
  border-bottom: 1px solid var(--border-glass);
  padding: 10px 36px;
  overflow-x: auto;
}

.spread-tab-btn {
  background: transparent;
  border: none;
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
  white-space: nowrap;
  transition: var(--transition-smooth);
}

.spread-tab-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

.spread-tab-btn.active {
  color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.12);
  font-weight: 600;
}

/* Spread Body Panes */
.catalog-spread-body {
  padding: 32px 36px;
}

.spread-tab-pane {
  display: none;
}

.spread-tab-pane.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.spread-two-col {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
}

.modal-canvas-box {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #08090d;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border-glass);
}

.modal-canvas-box canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.spec-heading {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
  letter-spacing: 0.12em;
  margin-bottom: 10px;
}

.spec-paragraph {
  color: #cbd5e1;
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 20px;
}

.packaging-card {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border-glass);
  border-radius: 8px;
  padding: 14px;
  margin-bottom: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.p-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
}

.p-row span {
  color: var(--text-dim);
}

.p-row strong {
  color: #fff;
  font-family: var(--font-mono);
}

.spec-grid-table {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.spec-row {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-glass);
  padding: 10px 14px;
  border-radius: 6px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.spec-key {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent-orange);
}

.spec-val {
  font-size: 0.85rem;
  color: #e2e8f0;
}

/* Narrative & Ideation Cards */
.case-study-narrative {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.narrative-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.ideation-sketch-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.ideation-card {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border-glass);
  border-radius: 10px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.card-sketch-thumb {
  width: 100%;
  height: 140px;
  border-radius: 6px;
  background: #151822;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.thumb-napkin {
  background: radial-gradient(circle, #222736 0%, #11131c 100%);
}

.thumb-proportion {
  background: linear-gradient(135deg, #182030 0%, #0d121c 100%);
}

.thumb-marker {
  background: radial-gradient(circle, #2a2c3a 0%, #14151e 100%);
}

/* Proportion Study & Tape Drawing */
.proportion-interactive-wrap {
  background: #080a0f;
  border: 1px solid var(--border-glass);
  border-radius: 10px;
  overflow: hidden;
}

.proportion-hud-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(0, 0, 0, 0.6);
  padding: 10px 18px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-cyan);
}

.hud-toggles {
  display: flex;
  gap: 14px;
}

.hud-toggles label {
  color: #cbd5e1;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 6px;
}

.proportion-canvas-area {
  padding: 24px;
  display: flex;
  justify-content: center;
}

.tape-drawing-svg {
  width: 100%;
  max-height: 380px;
}

/* 3D Zebra Surfacing */
.zebra-interactive-wrap {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.zebra-canvas-box {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #090a0f;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border-glass);
}

.zebra-canvas-box canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.zebra-controls-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.zebra-status-text {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-cyan);
}

/* ==========================================================================
   Before/After Split Slider Component
   ========================================================================== */
.before-after-container {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9; /* 와이드 16:9 비율 */
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border-glass);
  user-select: none;
  cursor: ew-resize;
  background: #08090d;
}

.ba-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.ba-before {
  width: 50%; /* Initial 50% split */
  z-index: 2;
  border-right: 2px solid var(--accent-cyan);
}

.ba-after {
  z-index: 1;
}

.ba-image-sim {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: flex-end;
  padding: 16px;
}

/* Photoreal Render Simulation Graphic */
.render-photoreal {
  background: radial-gradient(circle at 60% 40%, #2a3142 0%, #0d0f15 75%);
}

/* Wireframe CAD Simulation Graphic */
.render-wireframe {
  background: linear-gradient(135deg, #0d121c 0%, #06080e 100%);
  background-image: 
    linear-gradient(rgba(0, 242, 254, 0.15) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 242, 254, 0.15) 1px, transparent 1px);
  background-size: 24px 24px;
}

.ba-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 4px 10px;
  border-radius: 4px;
  font-weight: 700;
}

.tag-after {
  background: rgba(255, 107, 0, 0.85);
  color: #fff;
  margin-left: auto;
}

.tag-before {
  background: rgba(0, 242, 254, 0.85);
  color: #06080e;
}

.ba-handle {
  position: absolute;
  top: 0;
  left: 50%;
  bottom: 0;
  width: 40px;
  transform: translateX(-50%);
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.ba-handle-line {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--accent-cyan);
  box-shadow: 0 0 10px var(--accent-cyan);
}

.ba-handle-knob {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #0a0c12;
  border: 2px solid var(--accent-cyan);
  box-shadow: 0 0 16px rgba(0, 242, 254, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--accent-cyan);
  z-index: 2;
}

/* ==========================================================================
   360° Turntable Interactive Viewer
   ========================================================================== */
.turntable-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.turntable-canvas-box {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #08090d;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--border-glass);
  cursor: grab;
}

.turntable-canvas-box:active {
  cursor: grabbing;
}

.turntable-canvas-box canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.turntable-drag-hint {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.75);
  border: 1px solid rgba(0, 242, 254, 0.3);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 4px 12px;
  border-radius: 20px;
  pointer-events: none;
  animation: pulseHint 2s infinite;
}

@keyframes pulseHint {
  0%, 100% { opacity: 0.8; }
  50% { opacity: 0.3; }
}

.turntable-controls {
  display: flex;
  align-items: center;
  gap: 14px;
  background: rgba(0, 0, 0, 0.35);
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid var(--border-glass);
}

.t-angle-display {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-cyan);
  font-weight: 700;
  min-width: 45px;
}

.turntable-controls input[type="range"] {
  flex-grow: 1;
}

/* Catalog Modal Footer */
.catalog-modal-footer-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 36px;
  border-top: 1px solid var(--border-glass);
  background: rgba(0, 0, 0, 0.25);
}

/* ==========================================================================
   Upload Studio Modal (#upload-modal & #artwork-upload-form)
   ========================================================================== */
.upload-studio-modal {
  max-width: 840px;
  padding: 36px;
}

.upload-studio-header {
  margin-bottom: 24px;
}

.upload-dropzone {
  border: 2px dashed var(--border-glass-bright);
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  background: rgba(0, 0, 0, 0.3);
  cursor: pointer;
  transition: var(--transition-smooth);
  margin-bottom: 20px;
}

.upload-dropzone:hover {
  border-color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.04);
}

.upload-form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 16px;
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 16px;
}

.form-field label {
  font-size: 0.85rem;
  font-weight: 500;
  color: #e2e8f0;
}

.form-field input,
.form-field textarea {
  background: rgba(0, 0, 0, 0.45);
  border: 1px solid var(--border-glass-bright);
  color: #fff;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 0.88rem;
  outline: none;
  font-family: var(--font-body);
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--accent-cyan);
}

.upload-form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 24px;
}

/* Resume Preview Modal */
.resume-preview-modal {
  max-width: 800px;
  padding: 40px;
}

.resume-sheet {
  background: #ffffff;
  color: #1e293b;
  border-radius: 10px;
  padding: 40px;
}

.resume-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 20px;
}

.r-name {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: #0f172a;
}

.r-role {
  font-size: 0.9rem;
  color: #0284c7;
  font-weight: 600;
}

.r-contact-info {
  display: flex;
  flex-direction: column;
  font-size: 0.8rem;
  color: #64748b;
  text-align: right;
}

.r-divider {
  border: 0;
  height: 1px;
  background: #e2e8f0;
  margin: 16px 0 24px 0;
}

.r-section {
  margin-bottom: 24px;
}

.r-section h3 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #0369a1;
  border-bottom: 2px solid #0369a1;
  padding-bottom: 4px;
  margin-bottom: 12px;
  letter-spacing: 0.08em;
}

.r-item {
  margin-bottom: 12px;
}

.r-item strong {
  display: block;
  font-size: 0.95rem;
  color: #0f172a;
}

.r-date {
  font-size: 0.75rem;
  color: #94a3b8;
  font-family: var(--font-mono);
}

.r-item p {
  font-size: 0.85rem;
  color: #334155;
  margin-top: 2px;
}

.resume-modal-actions {
  margin-top: 24px;
  display: flex;
  justify-content: flex-end;
}

/* Print Stylesheet for Resume */
@media print {
  body * {
    visibility: hidden;
  }
  .resume-sheet, .resume-sheet * {
    visibility: visible;
  }
  .resume-sheet {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    margin: 0;
    padding: 20px;
  }
  .resume-modal-actions {
    display: none;
  }
}

/* ==========================================================================
   Responsive Breakpoints & Mobile Optimization (Aspect Ratio Preservation)
   ========================================================================== */
@media (max-width: 1024px) {
  .featured-grid,
  .works-grid,
  .sketchbook-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-card,
  .playground-container {
    grid-template-columns: 1fr;
  }

  .spread-two-col {
    grid-template-columns: 1fr;
  }

  .tool-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .navbar {
    padding: 0 20px;
  }

  .nav-links {
    display: none; /* Mobile Drawer fallback */
  }

  .hero-section {
    padding: 90px 20px 24px 20px;
  }

  .hero-top-frame {
    flex-direction: column;
    gap: 12px;
  }

  .hero-telemetry-hud {
    display: none; /* 모바일에서는 상단 HUD를 숨겨 자동차와 기류 시야를 100% 확보 */
  }

  .hero-center-spacer {
    min-height: 220px;
  }

  .hero-cta-group {
    flex-direction: column;
    width: 100%;
  }

  .hero-cta-group .btn {
    width: 100%;
  }

  .featured-section,
  #works,
  .sketchbook-section,
  #playground,
  #about,
  #contact {
    padding: 60px 20px;
  }

  .featured-grid,
  .works-grid,
  .sketchbook-grid {
    grid-template-columns: 1fr;
  }

  .ideation-sketch-cards {
    grid-template-columns: 1fr;
  }

  .form-row-2,
  .upload-form-grid {
    grid-template-columns: 1fr;
  }

  .about-card,
  .contact-container {
    padding: 28px 20px;
  }

  .catalog-spread-header,
  .catalog-spread-body,
  .spread-nav-tabs,
  .catalog-modal-footer-actions {
    padding: 16px 20px;
  }

  /* 모바일 종횡비 유지 (16:9 와이드 비주얼 크롭 방지) */
  .featured-visual-wrapper,
  .card-visual,
  .before-after-container,
  .turntable-canvas-box,
  .modal-canvas-box,
  .zebra-canvas-box {
    aspect-ratio: 16 / 9 !important;
  }
}