/* ============================================
   3chan Portal - Premium Dark Theme
   Glassmorphism + Animated Gradient + Glow FX
   ============================================ */

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

:root {
  --primary: #0a0a1a;
  --secondary: #0d1128;
  --accent: #0f1e3d;
  --highlight: #e94560;
  --highlight-glow: rgba(233, 69, 96, 0.4);
  --highlight-soft: rgba(233, 69, 96, 0.15);
  --text: #f0f0f5;
  --text-muted: #8b8fa3;
  --card-bg: rgba(255, 255, 255, 0.04);
  --card-bg-hover: rgba(255, 255, 255, 0.08);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-border-hover: rgba(233, 69, 96, 0.5);
  --glass-blur: 20px;
  --cyan: #00d4ff;
  --purple: #7b2fef;
  --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
}

/* Animated gradient background + dot grid pattern */
body {
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--primary);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
}

/* Animated gradient layer */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, rgba(123, 47, 239, 0.15) 0%, transparent 60%),
    radial-gradient(ellipse 60% 80% at 80% 90%, rgba(233, 69, 96, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse 70% 50% at 50% 50%, rgba(0, 212, 255, 0.06) 0%, transparent 60%);
  animation: gradientShift 12s ease-in-out infinite alternate;
  z-index: -2;
  pointer-events: none;
}

/* Dot grid pattern overlay */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    radial-gradient(circle, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 32px 32px;
  z-index: -1;
  pointer-events: none;
  animation: patternFade 2s ease-out forwards;
}

@keyframes gradientShift {
  0% {
    transform: scale(1) rotate(0deg);
    opacity: 1;
  }
  50% {
    transform: scale(1.1) rotate(1deg);
    opacity: 0.8;
  }
  100% {
    transform: scale(1.05) rotate(-1deg);
    opacity: 1;
  }
}

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

/* Fade-in on load for all major sections */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes floatGentle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 20px rgba(233, 69, 96, 0.0); }
  50% { box-shadow: 0 0 30px rgba(233, 69, 96, 0.15); }
}

@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

@keyframes borderGlow {
  0%, 100% { border-color: rgba(255, 255, 255, 0.08); }
  50% { border-color: rgba(233, 69, 96, 0.25); }
}

/* ============ Header ============ */
.header {
  text-align: center;
  padding: 80px 20px 50px;
  animation: fadeInUp 0.8s var(--transition-smooth) both;
  position: relative;
}

.header h1 {
  font-size: 4rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
  line-height: 1.1;
  background: linear-gradient(135deg, var(--text) 0%, rgba(240, 240, 245, 0.7) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 2px 10px rgba(0, 0, 0, 0.3));
}

.header h1 span {
  background: linear-gradient(135deg, var(--highlight) 0%, #ff6b8a 50%, var(--highlight) 100%);
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 4s linear infinite;
  filter: drop-shadow(0 0 20px var(--highlight-glow));
}

.header .tagline {
  font-size: 1.15rem;
  color: var(--text-muted);
  font-weight: 300;
  letter-spacing: 0.02em;
  animation: fadeIn 1.2s var(--transition-smooth) 0.3s both;
}

/* ============ Service Cards Container ============ */
.services {
  max-width: 960px;
  margin: 0 auto;
  padding: 40px 24px 60px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 28px;
  animation: fadeInUp 0.8s var(--transition-smooth) 0.2s both;
}

/* ============ Service Card - Glassmorphism ============ */
.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 40px 36px;
  transition:
    transform 0.4s var(--transition-smooth),
    box-shadow 0.4s var(--transition-smooth),
    border-color 0.4s var(--transition-smooth),
    background 0.4s var(--transition-smooth);
  text-decoration: none;
  color: var(--text);
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.6s var(--transition-smooth) both;
}

/* Stagger card animations */
.card:nth-child(1) { animation-delay: 0.3s; }
.card:nth-child(2) { animation-delay: 0.45s; }
.card:nth-child(3) { animation-delay: 0.6s; }
.card:nth-child(4) { animation-delay: 0.75s; }
.card:nth-child(5) { animation-delay: 0.9s; }
.card:nth-child(6) { animation-delay: 1.05s; }

/* Gradient shine overlay on hover */
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.03) 40%,
    rgba(255, 255, 255, 0.06) 50%,
    rgba(255, 255, 255, 0.03) 60%,
    transparent 100%
  );
  transition: left 0.6s var(--transition-smooth);
  z-index: 0;
  pointer-events: none;
}

/* Top accent glow line */
.card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--highlight), var(--cyan), transparent);
  transition: width 0.5s var(--transition-smooth);
  border-radius: 0 0 4px 4px;
  z-index: 1;
}

.card:hover {
  transform: translateY(-10px) scale(1.02);
  box-shadow:
    0 25px 60px rgba(0, 0, 0, 0.4),
    0 0 40px var(--highlight-soft),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  border-color: var(--card-border-hover);
  background: var(--card-bg-hover);
}

.card:hover::before {
  left: 100%;
}

.card:hover::after {
  width: 80%;
}

.card-icon {
  font-size: 2.8rem;
  margin-bottom: 20px;
  position: relative;
  z-index: 1;
  display: inline-block;
  animation: floatGentle 4s ease-in-out infinite;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

.card:nth-child(2) .card-icon { animation-delay: 0.5s; }
.card:nth-child(3) .card-icon { animation-delay: 1s; }
.card:nth-child(4) .card-icon { animation-delay: 1.5s; }
.card:nth-child(5) .card-icon { animation-delay: 2s; }
.card:nth-child(6) .card-icon { animation-delay: 2.5s; }

.card h2 {
  font-size: 1.55rem;
  font-weight: 700;
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
  letter-spacing: -0.01em;
  transition: color 0.3s var(--transition-smooth);
}

.card:hover h2 {
  color: #ffffff;
}

.card .domain {
  font-size: 0.82rem;
  color: var(--highlight);
  font-weight: 600;
  margin-bottom: 14px;
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  position: relative;
  z-index: 1;
  letter-spacing: 0.03em;
  text-shadow: 0 0 15px var(--highlight-glow);
  transition: text-shadow 0.3s var(--transition-smooth);
}

.card:hover .domain {
  text-shadow: 0 0 25px var(--highlight-glow);
}

.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  flex: 1;
  position: relative;
  z-index: 1;
  line-height: 1.7;
  transition: color 0.3s var(--transition-smooth);
}

.card:hover p {
  color: #a0a4b8;
}

.card .arrow {
  margin-top: 24px;
  font-size: 0.9rem;
  color: var(--highlight);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  position: relative;
  z-index: 1;
  transition: gap 0.3s var(--transition-smooth);
}

.card .arrow span {
  transition: transform 0.3s var(--transition-smooth);
  display: inline-block;
}

.card:hover .arrow {
  gap: 12px;
  text-shadow: 0 0 15px var(--highlight-glow);
}

.card:hover .arrow span {
  transform: translateX(6px);
}

/* ============ Footer ============ */
.footer {
  text-align: center;
  padding: 50px 20px;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  margin-top: 40px;
  position: relative;
  animation: fadeIn 1s var(--transition-smooth) 0.8s both;
  letter-spacing: 0.02em;
  background: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, 0.2) 100%);
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--highlight), transparent);
  opacity: 0.5;
}

/* ============ Ad Container ============ */
.ad-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 10px 24px;
  text-align: center;
  animation: fadeIn 1s var(--transition-smooth) 0.6s both;
}

/* ============ Responsive ============ */
@media (max-width: 768px) {
  .header {
    padding: 60px 20px 36px;
  }

  .header h1 {
    font-size: 3rem;
  }

  .services {
    gap: 20px;
  }
}

@media (max-width: 480px) {
  .header h1 {
    font-size: 2.4rem;
  }

  .header .tagline {
    font-size: 0.95rem;
  }

  .services {
    grid-template-columns: 1fr;
    padding: 20px 16px 40px;
  }

  .card {
    padding: 30px 26px;
    border-radius: 16px;
  }

  .card:hover {
    transform: translateY(-6px) scale(1.01);
  }

  .card-icon {
    font-size: 2.4rem;
  }
}

/* ============ Subdomain Page Styles ============ */
.sub-header {
  text-align: center;
  padding: 56px 20px 36px;
  animation: fadeInUp 0.7s var(--transition-smooth) both;
}

.sub-header .back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  margin-bottom: 24px;
  transition: color 0.3s var(--transition-smooth), gap 0.3s var(--transition-smooth);
  padding: 8px 16px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.sub-header .back:hover {
  color: var(--highlight);
  gap: 10px;
  background: rgba(233, 69, 96, 0.08);
  border-color: rgba(233, 69, 96, 0.2);
}

.sub-header h1 {
  font-size: 2.8rem;
  font-weight: 900;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text) 0%, rgba(240, 240, 245, 0.7) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sub-header .desc {
  color: var(--text-muted);
  margin-top: 14px;
  font-size: 1.08rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

.content {
  max-width: 840px;
  margin: 0 auto;
  padding: 20px 24px 70px;
  animation: fadeInUp 0.7s var(--transition-smooth) 0.15s both;
}

.content section {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 32px;
  margin-bottom: 24px;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition:
    border-color 0.4s var(--transition-smooth),
    box-shadow 0.4s var(--transition-smooth),
    background 0.4s var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.content section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  background: linear-gradient(180deg, var(--highlight), var(--cyan));
  border-radius: 3px;
  transition: height 0.5s var(--transition-smooth);
}

.content section:hover {
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
  background: var(--card-bg-hover);
}

.content section:hover::before {
  height: 100%;
}

/* Stagger section animations */
.content section:nth-child(1) { animation: fadeInUp 0.5s var(--transition-smooth) 0.3s both; }
.content section:nth-child(2) { animation: fadeInUp 0.5s var(--transition-smooth) 0.45s both; }
.content section:nth-child(3) { animation: fadeInUp 0.5s var(--transition-smooth) 0.6s both; }
.content section:nth-child(4) { animation: fadeInUp 0.5s var(--transition-smooth) 0.75s both; }
.content section:nth-child(5) { animation: fadeInUp 0.5s var(--transition-smooth) 0.9s both; }

.content section h2 {
  font-size: 1.25rem;
  margin-bottom: 14px;
  color: var(--highlight);
  font-weight: 700;
  letter-spacing: -0.01em;
  text-shadow: 0 0 20px var(--highlight-soft);
}

.content section p,
.content section li {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.8;
}

.content section ul {
  list-style: none;
  padding: 0;
}

.content section ul li {
  padding: 6px 0;
  transition: transform 0.2s var(--transition-smooth), color 0.2s var(--transition-smooth);
}

.content section ul li:hover {
  transform: translateX(6px);
  color: var(--text);
}

.content section ul li::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--highlight);
  margin-right: 12px;
  vertical-align: middle;
  box-shadow: 0 0 8px var(--highlight-glow);
  transition: box-shadow 0.3s var(--transition-smooth);
}

.content section ul li:hover::before {
  box-shadow: 0 0 14px var(--highlight-glow);
}

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

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

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

::-webkit-scrollbar-thumb:hover {
  background: rgba(233, 69, 96, 0.4);
}

/* ============ Selection Styling ============ */
::selection {
  background: var(--highlight);
  color: white;
}

/* ============ Focus Styles for Accessibility ============ */
.card:focus-visible,
.sub-header .back:focus-visible {
  outline: 2px solid var(--highlight);
  outline-offset: 4px;
}

/* ============ Reduced Motion ============ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}