/* ===== DIT - Unified Stylesheet ===== */
/* Common styles for all DIT website pages */

/* CSS Custom Properties */
:root {
  --bg: #0b0c10;
  --card: #0f1116;
  --muted: #9aa4b2;
  --text: #e7ecf3;
  --accent: #59ffa7;
  --accent-2: #7aa2ff;
  --border: rgba(255,255,255,.08);
  --danger: #ff5566;
  --warning: #ffaa00;
  --ai-purple: #a78bfa;
  --ai-cyan: #22d3ee;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
  line-height: 1.6;
  position: relative;
}

/* 흐르는 그라데이션 오버레이 */
body::before{
  content:"";
  position:fixed; inset:-20% -10% -10% -10%;
  background:
    radial-gradient(30% 25% at 15% 20%, rgba(255,255,255,.04), transparent 50%),
    radial-gradient(35% 30% at 85% 30%, rgba(255,255,255,.035), transparent 55%),
    radial-gradient(25% 20% at 50% 70%, rgba(255,255,255,.03), transparent 45%),
    radial-gradient(40% 35% at 25% 80%, rgba(255,255,255,.025), transparent 50%);
  mix-blend-mode: screen;
  filter: blur(2px);
  animation: floatBlob 28s linear infinite alternate;
  pointer-events:none;
  z-index:0;
}
@keyframes floatBlob{
  0%   { transform: translate3d(0,0,0) scale(1); }
  100% { transform: translate3d(-3%, 1.5%, 0) scale(1.03); }
}

/* 파티클 캔버스 */
#bg{
  position:fixed; inset:0;
  z-index:-1;
  display:block;
  pointer-events:none;
}

a { 
  color: inherit; 
  text-decoration: none; 
}

/* Navigation */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 16px 28px;
  backdrop-filter: blur(10px);
  background: rgba(11,12,16,.85);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand { 
  letter-spacing: 6px; 
  font-weight: 800;
  font-size: 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  height: 40px;
  width: auto;
  display: block;
  margin-right: -4px;
}

.nav ul { 
  display: flex; 
  gap: 22px; 
  list-style: none; 
  margin: 0; 
  padding: 0; 
}

.nav a { 
  font-size: 13px; 
  letter-spacing: 1px;
  color: #c7d2e1;
  transition: color 0.2s;
}

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

/* Dropdown Menu */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-content {
  display: none;
  position: absolute;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  min-width: 200px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  z-index: 100;
  top: 100%;
  right: -50px;
  backdrop-filter: blur(10px);
  margin-top: 0px;
  opacity: 0;
  transform: translateY(-10px);
  transition: all 0.2s ease-out;
  pointer-events: none;
}

/* 드롭다운과 상위 요소 사이의 보이지 않는 연결 영역 */
.dropdown-content::before {
  content: '';
  position: absolute;
  top: -8px;
  left: 0;
  right: 0;
  height: 8px;
  background: transparent;
}

.dropdown-content a {
  color: var(--text);
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  font-size: 13px;
  letter-spacing: 0.5px;
  transition: all 0.2s;
  border-bottom: 1px solid var(--border);
}

.dropdown-content a:last-child {
  border-bottom: none;
}

.dropdown-content a:hover {
  background: rgba(89,255,167,0.1);
  color: var(--accent);
}

.dropdown:hover .dropdown-content {
  display: block;
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.dropdown-arrow {
  margin-left: 4px;
  font-size: 10px;
  transition: transform 0.2s;
}

.dropdown:hover .dropdown-arrow {
  transform: rotate(180deg);
}

/* Layout Containers */
.wrap { 
  max-width: 1200px; 
  margin: 0 auto; 
  padding: 40px 28px; 
}

.section { 
  padding: 60px 0; 
  border-bottom: 1px solid var(--border); 
}

/* Hero Section */
.hero {
  min-height: 70vh;
  display: grid;
  place-items: center;
  text-align: center;
  background: 
    radial-gradient(1200px 600px at 50% -10%, rgba(122,162,255,.15), transparent),
    radial-gradient(1000px 500px at 80% 120%, rgba(89,255,167,.08) , transparent);
  border-bottom: 1px solid var(--border);
  padding: 80px 0 60px;
  position: relative;
  z-index: 1;
}

.h1 {
  font-size: clamp(36px, 6vw, 58px);
  line-height: 1.1;
  margin: 0 0 12px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.sub { 
  color: var(--muted); 
  font-size: clamp(14px, 2.3vw, 18px); 
  margin-bottom: 28px; 
  max-width: 800px;
}

/* Typography */
.title { 
  font-size: 28px; 
  margin: 0 0 12px; 
  font-weight: 800; 
}

.desc { 
  color: var(--muted); 
  margin-bottom: 24px; 
}

/* Grid Layouts */
.grid-3 { 
  display: grid; 
  grid-template-columns: repeat(3, minmax(0,1fr)); 
  gap: 16px; 
}

.grid-2 { 
  display: grid; 
  grid-template-columns: repeat(2, minmax(0,1fr)); 
  gap: 16px; 
}

.stats {
  display: grid; 
  grid-template-columns: repeat(4, minmax(0,1fr)); 
  gap: 14px; 
  margin-top: 26px;
}

/* Cards */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  transition: transform .2s ease, box-shadow .2s ease;
}

.card:hover { 
  transform: translateY(-4px); 
  box-shadow: 0 8px 24px rgba(0,0,0,.35); 
}

.stat { 
  background: var(--card); 
  border: 1px solid var(--border); 
  padding: 18px; 
  border-radius: 12px; 
  text-align: center;
  transition: transform .2s ease, box-shadow .2s ease;
}

.stat:hover { 
  transform: translateY(-4px); 
  box-shadow: 0 8px 24px rgba(0,0,0,.35); 
}

.stat .v { 
  font-size: 28px; 
  font-weight: 800; 
  color: var(--accent);
}

.stat .l { 
  font-size: 12px; 
  color: var(--muted); 
  letter-spacing: 1px; 
  text-transform: uppercase; 
  margin-top: 4px;
}

/* Badges */
.badge { 
  display: inline-block; 
  padding: 4px 10px; 
  border-radius: 999px; 
  font-size: 12px; 
  letter-spacing: .5px;
  font-weight: 600;
}

.badge.pro { 
  background: rgba(122,162,255,.16); 
  color: #dbe6ff; 
  border: 1px solid rgba(122,162,255,.35); 
}

.badge.ind { 
  background: rgba(89,255,167,.1); 
  color: #c7ffe7; 
  border: 1px solid rgba(89,255,167,.35); 
}

.badge.secure { 
  background: rgba(255,85,102,.1); 
  color: #ffb3bd; 
  border: 1px solid rgba(255,85,102,.35); 
}

.badge.ai { 
  background: linear-gradient(135deg, rgba(167,139,250,.2), rgba(34,211,238,.2)); 
  color: #e0d4ff; 
  border: 1px solid rgba(167,139,250,.4); 
}

/* Feature Lists */
.feature-list { 
  margin: 12px 0 0 0; 
  padding-left: 18px; 
  font-size: 14px;
}

.feature-list li { 
  margin: 8px 0; 
}

/* Highlight Boxes */
.highlight {
  border: 1px dashed rgba(255,255,255,.18);
  background: linear-gradient(180deg, rgba(122,162,255,.08), rgba(122,162,255,0) 50%), var(--card);
  padding: 20px; 
  border-radius: 12px;
  margin-top: 18px;
}

/* KPI Grid */
.kpigrid { 
  display: grid; 
  grid-template-columns: repeat(6, minmax(0,1fr)); 
  gap: 10px; 
}

.kpi { 
  background: var(--card); 
  border: 1px solid var(--border); 
  border-radius: 12px; 
  padding: 14px; 
  text-align: center; 
}

.kpi .big { 
  font-weight: 800; 
  font-size: 22px; 
  color: var(--accent);
}

.kpi .lab { 
  color: var(--muted); 
  font-size: 12px; 
  margin-top: 4px;
}

/* Video/Media Components */
.shot {
  aspect-ratio: 16 / 9;
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  overflow: hidden;
  background: #000;
  position: relative;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.shot:hover {
  transform: translateY(-2px);  
  box-shadow: 0 16px 40px rgba(89,255,167,0.2);
  border-color: var(--accent);
}

.shot video { 
  width: 100%; 
  height: 100%; 
  object-fit: contain;
  display: block;
  opacity: 0;
  animation: fadeIn 0.5s ease-out forwards;
}

.shot img { 
  width: 100%; 
  height: 100%; 
  object-fit: contain;
  display: block;
}

.shot canvas { 
  width: 100%; 
  height: 100%; 
  display: block;
}

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

.shot.loaded {
  background: #000;
}

.shot:hover video {
  filter: brightness(1.1);
}

.video-controls {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  opacity: 0;
  transition: opacity 0.3s;
  z-index: 15;
}

.shot:hover .video-controls {
  opacity: 1;
}

.video-btn {
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.2);
  color: var(--text);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 12px;
  transition: all 0.2s;
}

.video-btn:hover {
  background: rgba(89,255,167,0.2);
  border-color: var(--accent);
}

.shot-label {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(0,0,0,0.8);
  backdrop-filter: blur(10px);
  color: var(--accent);
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  z-index: 10;
  display: flex;
  align-items: center;
  gap: 6px;
}

.shot-label::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Footer */
.footer { 
  text-align: center; 
  color: var(--muted); 
  padding: 60px 28px;
  background: var(--card);
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-logo {
  height: 42px;
  width: auto;
  display: block;
  margin: 0 auto 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 40px;
  text-align: left;
}

.footer-section h4 {
  color: var(--text);
  margin-bottom: 16px;
  font-size: 16px;
}

.footer-section p, .footer-section a {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
  display: block;
  margin-bottom: 8px;
}

.footer-section a:hover {
  color: var(--accent);
}

/* Buttons */
.btn {
  padding: 14px 32px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.5px;
  transition: all 0.3s;
  cursor: pointer;
  border: none;
  display: inline-block;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #000;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(89,255,167,0.3);
}

.btn-secondary {
  background: transparent;
  border: 2px solid var(--border);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: var(--accent);
  background: rgba(89,255,167,0.1);
}

/* AI Enhancements */
.ai-glow {
  box-shadow: 0 0 20px rgba(167,139,250,.3);
  border-color: var(--ai-purple);
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.tech-tag {
  padding: 6px 12px;
  background: rgba(167,139,250,.15);
  border: 1px solid rgba(167,139,250,.3);
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  color: var(--ai-purple);
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  color: var(--text);
}

th, td {
  text-align: left;
  padding: 8px;
}

th {
  border-bottom: 1px solid #333;
}

/* Print Styles */
@media print {
  body { 
    background: #fff !important; 
    color: #000 !important; 
  }
  .nav, .footer { 
    display: none !important; 
  }
  .hero { 
    background: none !important; 
    padding: 12px 0 !important; 
    min-height: auto !important; 
  }
  .wrap { 
    padding: 8px 0 !important; 
    max-width: 100% !important; 
  }
  .section { 
    padding: 10px 0 !important; 
    border: none !important; 
  }
  .title { 
    margin: 6px 0 6px !important; 
  }
  .sub, .desc { 
    color: #222 !important; 
  }
  .card, .highlight, .stat, .kpi, .shot { 
    page-break-inside: avoid !important; 
    break-inside: avoid !important; 
    box-shadow: none !important;
    border-color: #ccc !important;
  }
  .grid-2, .grid-3, .stats, .kpigrid { 
    gap: 8px !important; 
  }
  .shot, .shot img, img { 
    max-width: 100% !important; 
    height: auto !important; 
  }
  h1, .h1 { 
    font-size: 24pt !important; 
  }
  h2.title { 
    font-size: 16pt !important; 
  }
  .sub, .desc, li, p, table { 
    font-size: 10.5pt !important; 
  }
  table { 
    page-break-inside: avoid !important; 
  }
  thead { 
    display: table-header-group; 
  }
  .video-controls, .shot-label { 
    display: none !important; 
  }
}

/* Responsive Design */
@media (max-width: 900px) {
  .stats { 
    grid-template-columns: repeat(2, minmax(0,1fr)); 
  }
  .grid-3, .grid-2 { 
    grid-template-columns: 1fr; 
  }
  .kpigrid { 
    grid-template-columns: repeat(3, minmax(0,1fr)); 
  }
  .footer-grid { 
    grid-template-columns: 1fr; 
  }
  .brand-logo { 
    height: 30px; 
  }
  .brand { 
    font-size: 16px; 
    letter-spacing: 4px; 
    gap: 8px; 
  }
  .footer-logo { 
    height: 36px; 
  }
  .hero-cta { 
    flex-direction: column; 
    align-items: center; 
  }
  .btn { 
    width: 100%; 
    max-width: 300px; 
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Canvas Elements */
canvas {
  display: block;
  width: 100%;
  height: auto;
}

/* Additional utility classes that may be needed */
.muted {
  color: var(--muted);
}

.text-center {
  text-align: center;
}

.mt-4 {
  margin-top: 16px;
}

.mb-4 {
  margin-bottom: 16px;
}