/* ==========================================================================
   Mana High TRPG Club - TRPG Introduction Guide (이세리 부장의 1:1 대화형 가이드)
   Design System: Blending betelgeuse/pr (sketch & paper) + betelgeuse/home (mana portal)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Gaegu:wght@400;700&family=Nanum+Pen+Script&family=Noto+Sans+KR:wght@400;500;700;900&family=Noto+Serif+KR:wght@400;600;700&family=JetBrains+Mono:wght@400;600;700&family=Plus+Jakarta+Sans:wght@600;800&family=Rubik:wght@700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:wght,FILL@100..700,0..1&display=swap');

:root {
  /* Color Palette */
  --bg-paper: #fcfbf8;
  --bg-card: #ffffff;
  --bg-sheet: #f7f5ed;
  --bg-chalkboard: #1e293b;
  
  --border-pencil: #23272e;
  --border-light: #e2e8f0;
  
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-white: #ffffff;
  
  --mana-blue: #006687;
  --mana-blue-light: #5ac8fa;
  --mana-blue-bg: #e0f2fe;
  
  --seri-pink: #d946ef;
  --seri-pink-light: #fdf2f8;
  --seri-pink-border: #f472b6;
  
  --accent-gold: #eab308;
  --accent-gold-bg: #fefce8;
  --accent-green: #16a34a;
  --accent-red: #dc2626;

  /* Fonts */
  --font-sans: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Noto Serif KR', serif;
  --font-hand: 'Gaegu', cursive;
  --font-pen: 'Nanum Pen Script', cursive;
  --font-mono: 'JetBrains Mono', monospace;
  --font-display: 'Plus Jakarta Sans', 'Noto Sans KR', sans-serif;

  /* Hand-drawn Shadows & Curves */
  --sketch-shadow: 4px 4px 0px rgba(35, 39, 46, 0.95);
  --sketch-shadow-sm: 2px 2px 0px rgba(35, 39, 46, 0.95);
  --sketch-shadow-lg: 6px 7px 0px rgba(35, 39, 46, 0.95);
  --sketch-shadow-hover: 6px 7px 0px rgba(0, 102, 135, 0.9);
  --sketch-border-radius: 255px 15px 225px 15px/15px 225px 15px 255px;
  --sketch-border-pill: 255px 25px 225px 25px/25px 225px 25px 255px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-paper);
  background-image: 
    linear-gradient(to right, rgba(0, 102, 135, 0.035) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 102, 135, 0.035) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.7;
  overflow-x: hidden;
}

/* Typography Utilities */
.font-hand {
  font-family: var(--font-hand);
}
.font-pen {
  font-family: var(--font-pen);
  font-size: 1.35em;
}
.font-serif {
  font-family: var(--font-serif);
}
.font-mono {
  font-family: var(--font-mono);
}
.font-display {
  font-family: var(--font-display);
}

/* Containers */
.container {
  max-width: 1060px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Sketch Box Utility */
.sketch-card {
  background-color: var(--bg-card);
  border: 2.5px solid var(--border-pencil);
  border-radius: var(--sketch-border-radius);
  box-shadow: var(--sketch-shadow);
  padding: 1.75rem;
  position: relative;
  transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.2s ease;
}

.sketch-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--sketch-shadow-lg);
}

/* Site Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(252, 251, 248, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 2.5px solid var(--border-pencil);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 68px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-main);
}

.brand-avatar-img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid var(--border-pencil);
  object-fit: cover;
  box-shadow: var(--sketch-shadow-sm);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
}

.nav-link {
  text-decoration: none;
  color: var(--text-main);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.4rem 0.8rem;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.nav-link:hover {
  background-color: var(--mana-blue-bg);
  color: var(--mana-blue);
}

.audio-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background-color: var(--bg-card);
  border: 2px solid var(--border-pencil);
  border-radius: var(--sketch-border-pill);
  padding: 0.35rem 0.85rem;
  font-family: var(--font-hand);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--sketch-shadow-sm);
  transition: all 0.15s ease;
}

.audio-btn:hover {
  background-color: var(--accent-gold-bg);
  transform: scale(1.03);
}

/* Seri Dialogue Bubble Box */
.seri-dialogue-wrapper {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  margin: 1.25rem 0;
}

.seri-avatar-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 68px;
}

.seri-avatar-img {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  border: 2.5px solid var(--border-pencil);
  object-fit: cover;
  box-shadow: var(--sketch-shadow);
  background-color: #f7f5ed;
}

.seri-badge-tag {
  margin-top: -8px;
  background-color: var(--seri-pink);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 900;
  padding: 1px 7px;
  border-radius: 6px;
  border: 1.5px solid var(--border-pencil);
  white-space: nowrap;
  box-shadow: var(--sketch-shadow-sm);
}

.seri-speech-bubble {
  background: #ffffff;
  border: 2.5px solid var(--border-pencil);
  border-radius: 18px 24px 24px 18px;
  padding: 1.25rem 1.5rem;
  box-shadow: var(--sketch-shadow);
  position: relative;
  flex: 1;
}

.seri-speech-bubble::before {
  content: '';
  position: absolute;
  left: -12px;
  top: 24px;
  width: 0;
  height: 0;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-right: 12px solid var(--border-pencil);
}

.seri-speech-bubble::after {
  content: '';
  position: absolute;
  left: -9px;
  top: 25px;
  width: 0;
  height: 0;
  border-top: 9px solid transparent;
  border-bottom: 9px solid transparent;
  border-right: 10px solid #ffffff;
}

/* Classroom Illustration Banner */
.club-art-frame {
  border: 3px solid var(--border-pencil);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--sketch-shadow-lg);
  background-color: #ffffff;
  position: relative;
}

.club-art-img {
  width: 100%;
  height: auto;
  max-height: 480px;
  object-fit: cover;
  object-position: center 30%;
  display: block;
}

/* TRPG Core Trio Cards */
.trio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.trio-card {
  background: #ffffff;
  border: 2.5px solid var(--border-pencil);
  border-radius: 16px;
  padding: 1.75rem 1.5rem;
  box-shadow: var(--sketch-shadow);
  text-align: left;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
}

.trio-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--sketch-shadow-lg);
}

.trio-icon {
  width: 52px;
  height: 52px;
  margin-bottom: 1rem;
  border-radius: 50%;
  border: 2px solid var(--border-pencil);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  box-shadow: var(--sketch-shadow-sm);
}

/* Interactive Mini Adventure Quest */
.quest-console {
  background-color: #fffef8;
  border: 3px solid var(--border-pencil);
  border-radius: 20px;
  box-shadow: var(--sketch-shadow-lg);
  padding: 1.75rem;
  margin: 1.5rem 0;
}

.choice-btn {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  text-align: left;
  background: #ffffff;
  border: 2.5px solid var(--border-pencil);
  border-radius: 12px;
  padding: 0.9rem 1.15rem;
  margin-bottom: 0.75rem;
  cursor: pointer;
  box-shadow: var(--sketch-shadow-sm);
  font-size: 1rem;
  font-weight: 700;
  transition: all 0.15s ease;
}

.choice-btn:hover {
  background-color: var(--mana-blue-bg);
  border-color: var(--mana-blue);
  transform: translateX(3px);
}

.choice-btn.selected {
  background-color: var(--accent-gold-bg);
  border-color: var(--mana-blue);
  box-shadow: 0 0 0 3px var(--mana-blue-light);
}

/* Dice Roller Stage */
.dice-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1.75rem;
  background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
  border: 2px dashed var(--border-pencil);
  border-radius: 16px;
}

.d20-dice {
  width: 90px;
  height: 90px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  font-family: var(--font-mono);
  font-weight: 900;
  color: #ffffff;
  background: linear-gradient(135deg, #006687 0%, #00364a 100%);
  clip-path: polygon(50% 0%, 93% 25%, 93% 75%, 50% 100%, 7% 75%, 7% 25%);
  box-shadow: 0 8px 16px rgba(0,0,0,0.25);
  cursor: pointer;
  transition: transform 0.2s ease;
  user-select: none;
}

.d20-dice.rolling {
  animation: dice-shake 0.8s cubic-bezier(.36,.07,.19,.97) both;
}

@keyframes dice-shake {
  10%, 90% { transform: translate3d(-3px, -2px, 0) rotate(15deg) scale(1.1); }
  20%, 80% { transform: translate3d(4px, 3px, 0) rotate(-20deg) scale(1.15); }
  30%, 50%, 70% { transform: translate3d(-6px, -4px, 0) rotate(35deg) scale(1.2); }
  40%, 60% { transform: translate3d(6px, 5px, 0) rotate(-30deg) scale(1.1); }
}

/* Comparison Table */
.vs-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border: 2px solid var(--border-pencil);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--sketch-shadow-sm);
  margin: 1rem 0;
}

.vs-table th, .vs-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1.5px solid var(--border-pencil);
  border-right: 1.5px solid var(--border-pencil);
}

.vs-table th:last-child, .vs-table td:last-child {
  border-right: none;
}

.vs-table tr:last-child td {
  border-bottom: none;
}

.vs-table th {
  background-color: var(--mana-blue);
  color: #ffffff;
  font-weight: 800;
  text-align: left;
}

/* YouTube Video Grid */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 1.25rem;
}

.video-card {
  background: #ffffff;
  border: 2.5px solid var(--border-pencil);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--sketch-shadow);
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.video-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--sketch-shadow-lg);
}

.video-thumb-wrap {
  position: relative;
  width: 100%;
  padding-top: 56.25%; /* 16:9 */
  background-color: #000;
  overflow: hidden;
}

.video-thumb-wrap iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.video-info {
  padding: 1.15rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.video-channel-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--mana-blue);
  margin-bottom: 0.25rem;
}

.video-title {
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 0.35rem;
  color: var(--text-main);
}

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

/* Footer */
.site-footer {
  background-color: #1e293b;
  color: #94a3b8;
  border-top: 3px solid var(--border-pencil);
  padding: 2.5rem 0 2rem;
  margin-top: 4rem;
}

.footer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.25rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-links a {
  color: #cbd5e1;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--mana-blue-light);
}

.footer-version {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background-color: rgba(255,255,255,0.08);
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  border: 1px solid rgba(255,255,255,0.15);
  color: #e2e8f0;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  .seri-dialogue-wrapper {
    flex-direction: column;
    gap: 0.75rem;
  }
  .seri-speech-bubble::before, .seri-speech-bubble::after {
    display: none;
  }
  .sketch-card {
    padding: 1.25rem;
  }
}