:root {
  /* === ICSD × 漢神洲際冒險 主題 ===
   * --primary  深藍 #1A237E   TSMC 寶山科技藍
   * --secondary 金黃 #FFB300  漢神百貨金
   * --accent   翡翠 #00C896   台中綠/晶圓綠
   * --hanshin  暗紅 #C2185B   漢神品牌紅
   * --bg       深藍黑 #050b22  晶圓夜空背景
   */
  --primary:#1A237E; --secondary:#FFB300; --accent:#00C896; --hanshin:#C2185B;
  --bg:#050b22; --bg-card:rgba(255,255,255,0.06);
  --text:#e6ecff; --text-light:#8a96b8;
  --shadow:0 2px 16px rgba(255,179,0,0.08);
  --radius:14px;
  --glow-cyan:rgba(0,200,150,0.32); --glow-pink:rgba(255,179,0,0.32);
  --glow-blue:rgba(26,35,126,0.45);
}
* { margin:0; padding:0; box-sizing:border-box; }
body { font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif; background:var(--bg); color:var(--text); -webkit-tap-highlight-color:transparent; overflow-x:hidden; }
/* 當頁面有 .tech-stars-bg 時，body 透明讓星空顯現 */
body:has(.tech-stars-bg) { background:transparent; }
.btn { display:inline-flex; align-items:center; justify-content:center; gap:6px; padding:12px 24px; border-radius:var(--radius); font-size:15px; font-weight:700; border:none; cursor:pointer; transition:all 0.2s; }
.btn-primary { background:linear-gradient(135deg,#1A237E,#3949AB); color:white; box-shadow:0 4px 15px rgba(26,35,126,0.45); }
.btn-primary:active { background:#0E1862; transform:scale(0.97); }
.btn-secondary { background:linear-gradient(135deg,#FFB300,#FF8F00); color:#1A237E; box-shadow:0 4px 15px rgba(255,179,0,0.35); }
.btn-accent { background:linear-gradient(135deg,#00C896,#00897B); color:#fff; }
.btn-outline { background:transparent; border:2px solid var(--secondary); color:var(--secondary); }
.btn-block { width:100%; }
.btn-lg { padding:16px 28px; font-size:17px; border-radius:16px; }
.btn-sm { padding:8px 16px; font-size:13px; }
.input,.select { width:100%; padding:14px 16px; border:2px solid rgba(255,179,0,0.22); border-radius:var(--radius); font-size:15px; background:rgba(255,255,255,0.05); color:var(--text); outline:none; transition:border-color 0.2s; }
.input:focus,.select:focus { border-color:var(--secondary); box-shadow:0 0 12px var(--glow-pink); }
.form-group { margin-bottom:16px; }
.form-label { display:block; font-size:13px; font-weight:600; color:var(--secondary); margin-bottom:6px; text-transform:uppercase; letter-spacing:1px; }
.card { background:var(--bg-card); border:1px solid rgba(255,179,0,0.18); border-radius:var(--radius); padding:20px; box-shadow:var(--shadow); backdrop-filter:blur(10px); }
.notification-bar { position:fixed; top:-60px; left:16px; right:16px; background:rgba(5,11,34,0.95); border:1px solid rgba(255,179,0,0.32); padding:12px 16px; border-radius:14px; box-shadow:0 4px 20px rgba(255,179,0,0.18); z-index:200; transition:top 0.4s ease; font-size:14px; color:var(--text); }
.notification-bar.show { top:60px; }
.message-panel { position:fixed; top:0; left:0; right:0; bottom:0; background:var(--bg); z-index:150; transform:translateX(100%); transition:transform 0.3s ease; overflow-y:auto; padding:0; }
.message-panel.show { transform:translateX(0); }
.top-bar { position:sticky; top:0; display:flex; align-items:center; padding:12px 16px; background:rgba(5,11,34,0.95); border-bottom:1px solid rgba(255,179,0,0.18); z-index:50; backdrop-filter:blur(10px); }
.top-bar-back { background:none; border:none; font-size:20px; cursor:pointer; width:40px; color:var(--text); }
.top-bar-title { flex:1; text-align:center; font-size:16px; font-weight:700; color:var(--text); }
.page-container { padding:16px; max-width:480px; margin:0 auto; }
.rank-item { display:flex; align-items:center; gap:10px; padding:12px 14px; background:var(--bg-card); border:1px solid rgba(255,179,0,0.12); border-radius:12px; margin-bottom:8px; box-shadow:var(--shadow); animation:fadeIn 0.3s ease both; }
.rank-number { width:28px; height:28px; border-radius:50%; background:#f0f0f0; display:flex; align-items:center; justify-content:center; font-size:13px; font-weight:800; }
.rank-number.top1 { background:linear-gradient(135deg,#FFD700,#FFA000); color:white; }
.rank-number.top2 { background:linear-gradient(135deg,#C0C0C0,#9E9E9E); color:white; }
.rank-number.top3 { background:linear-gradient(135deg,#CD7F32,#A1887F); color:white; }
.rank-emoji { font-size:20px; }
.rank-name { font-size:14px; font-weight:600; }
.rank-bar { height:4px; background:linear-gradient(to right,var(--primary),var(--secondary)); border-radius:2px; margin-top:4px; transition:width 0.5s; }
.rank-score { font-size:18px; font-weight:900; color:var(--accent); }
.my-team { background:rgba(255,179,0,0.10); border-left:3px solid var(--secondary); }
.game-hud { display:flex; justify-content:space-around; padding:8px 16px; background:rgba(0,0,0,0.3); }
.hud-item { text-align:center; }
.hud-label { font-size:10px; color:rgba(255,255,255,0.5); }
.hud-value { font-size:20px; font-weight:900; color:white; }
.game-canvas-container { width:100%; display:flex; align-items:center; justify-content:center; }
.game-canvas-container canvas { display:block; max-width:100%; touch-action:none; }
.danmaku-item { position:absolute; right:-300px; white-space:nowrap; color:rgba(255,255,255,0.6); font-size:13px; animation:danmakuScroll 8s linear forwards; pointer-events:none; }
@keyframes danmakuScroll { from{right:-300px} to{right:calc(100% + 300px)} }
@keyframes fadeIn { from{opacity:0;transform:translateY(8px)} to{opacity:1;transform:translateY(0)} }
@keyframes slideUp { from{transform:translateY(100%)} to{transform:translateY(0)} }
@keyframes pulse { 0%,100%{transform:scale(1)} 50%{transform:scale(1.08)} }
@keyframes bounce { 0%,100%{transform:translateY(0)} 50%{transform:translateY(8px)} }
.spinner { width:32px; height:32px; border:3px solid rgba(255,179,0,0.18); border-top-color:var(--secondary); border-radius:50%; animation:spin 0.6s linear infinite; margin:0 auto; }

/* ============================================================
 * 🌌 TECH-STARS 探險背景 — 全頁底層星空 + 晶圓格紋 + 極光
 * Usage: 在 <body> 開頭加 <div class="tech-stars-bg"></div>
 * 不需 JS；GPU 加速；3 層星 + grid + aurora + 偶發流星
 * ============================================================ */
.tech-stars-bg {
  position:fixed; inset:0; z-index:-1; overflow:hidden; pointer-events:none;
  background:
    radial-gradient(ellipse 60% 40% at 18% 28%, rgba(26,35,126,0.55), transparent 70%),
    radial-gradient(ellipse 50% 35% at 82% 72%, rgba(255,179,0,0.18), transparent 70%),
    radial-gradient(ellipse 70% 50% at 50% 110%, rgba(0,200,150,0.18), transparent 70%),
    linear-gradient(180deg, #050b22 0%, #08102c 60%, #050b22 100%);
}
/* 大星(亮) */
.tech-stars-bg::before {
  content:""; position:absolute; inset:-10%; pointer-events:none;
  background-image:
    radial-gradient(1.6px 1.6px at 12% 14%, #ffffff 50%, transparent 100%),
    radial-gradient(2px 2px at 31% 58%, #FFD740 60%, transparent 100%),
    radial-gradient(1.4px 1.4px at 47% 22%, #ffffff 50%, transparent 100%),
    radial-gradient(2.4px 2.4px at 58% 71%, #FFB300 60%, transparent 100%),
    radial-gradient(1.4px 1.4px at 73% 11%, #ffffff 50%, transparent 100%),
    radial-gradient(1.6px 1.6px at 89% 47%, #ffffff 50%, transparent 100%),
    radial-gradient(1.4px 1.4px at 17% 83%, #ffffff 50%, transparent 100%),
    radial-gradient(2px 2px at 38% 91%, #00C896 60%, transparent 100%),
    radial-gradient(1.4px 1.4px at 64% 87%, #ffffff 50%, transparent 100%),
    radial-gradient(1.6px 1.6px at 9% 33%, #FFD740 60%, transparent 100%);
  background-size: 440px 440px;
  background-repeat: repeat;
  animation: techStarsTwinkle1 3.2s ease-in-out infinite alternate;
  opacity: 0.95;
}
/* 小星(暈) */
.tech-stars-bg::after {
  content:""; position:absolute; inset:-10%; pointer-events:none;
  background-image:
    radial-gradient(1px 1px at 7% 24%, #ffffff 70%, transparent 100%),
    radial-gradient(1px 1px at 23% 41%, #00C896 70%, transparent 100%),
    radial-gradient(1px 1px at 41% 12%, #ffffff 70%, transparent 100%),
    radial-gradient(1px 1px at 56% 35%, #ffffff 70%, transparent 100%),
    radial-gradient(1px 1px at 72% 64%, #FFB300 70%, transparent 100%),
    radial-gradient(1px 1px at 84% 19%, #ffffff 70%, transparent 100%),
    radial-gradient(1px 1px at 93% 78%, #ffffff 70%, transparent 100%),
    radial-gradient(1px 1px at 14% 67%, #FFD740 70%, transparent 100%),
    radial-gradient(1px 1px at 28% 88%, #ffffff 70%, transparent 100%),
    radial-gradient(1px 1px at 67% 96%, #00C896 70%, transparent 100%);
  background-size: 280px 280px;
  background-repeat: repeat;
  background-position: 140px 80px;
  animation: techStarsTwinkle2 5.4s ease-in-out infinite alternate;
  opacity: 0.7;
}
@keyframes techStarsTwinkle1 {
  0%   { opacity:0.55; transform:translate3d(0,0,0); }
  50%  { opacity:1; }
  100% { opacity:0.7; transform:translate3d(-6px,-8px,0); }
}
@keyframes techStarsTwinkle2 {
  0%   { opacity:0.35; transform:translate3d(0,0,0); }
  50%  { opacity:0.85; }
  100% { opacity:0.5; transform:translate3d(8px,5px,0); }
}

/* 晶圓格紋 — 慢速漂移 */
.tech-grid-overlay {
  position:fixed; inset:-10%; z-index:-1; pointer-events:none;
  background-image:
    linear-gradient(rgba(255,179,0,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,179,0,0.045) 1px, transparent 1px);
  background-size: 48px 48px;
  animation: techGridDrift 36s linear infinite;
  mix-blend-mode: screen;
}
@keyframes techGridDrift {
  from { transform: translate(0,0); }
  to   { transform: translate(48px,48px); }
}

/* 偶發流星 — 8 秒一次斜劃過去 */
.tech-shooting-star {
  position:fixed; top:18%; left:-200px; width:160px; height:1.5px; z-index:-1;
  background: linear-gradient(90deg, transparent 0%, #FFD740 30%, #ffffff 60%, transparent 100%);
  box-shadow: 0 0 8px rgba(255,215,64,0.7);
  transform: rotate(18deg);
  animation: techShoot 11s linear infinite;
  animation-delay: 3s;
  pointer-events:none; opacity:0;
}
.tech-shooting-star.b {
  top:48%; left:-200px; animation-duration:14s; animation-delay:8s;
  background: linear-gradient(90deg, transparent 0%, #00C896 30%, #ffffff 60%, transparent 100%);
  box-shadow: 0 0 8px rgba(0,200,150,0.6);
}
@keyframes techShoot {
  0%   { transform: translate3d(0,0,0) rotate(18deg); opacity:0; }
  5%   { opacity:1; }
  18%  { opacity:1; }
  25%  { transform: translate3d(130vw, 35vh, 0) rotate(18deg); opacity:0; }
  100% { opacity:0; }
}

/* 行動裝置降低動畫密度避免卡頓 */
@media (max-width: 480px) {
  .tech-stars-bg::before { background-size: 360px 360px; }
  .tech-stars-bg::after  { background-size: 220px 220px; }
}
@media (prefers-reduced-motion: reduce) {
  .tech-stars-bg::before, .tech-stars-bg::after,
  .tech-grid-overlay, .tech-shooting-star { animation: none !important; }
}
/* === Simon 寶山玄彬 mascot 樣式 === */
.simon-banner { display:flex; align-items:center; gap:12px; padding:12px 16px; margin:12px 0; background:linear-gradient(135deg, rgba(26,35,126,0.55), rgba(255,179,0,0.18)); border:1px solid rgba(255,179,0,0.35); border-radius:16px; box-shadow:0 4px 20px rgba(26,35,126,0.35); position:relative; overflow:hidden; }
.simon-banner::before { content:""; position:absolute; inset:0; background:radial-gradient(circle at 80% 50%, rgba(255,179,0,0.15), transparent 60%); pointer-events:none; }
.simon-avatar { width:56px; height:56px; border-radius:50%; background:#0E1862 center/cover no-repeat url('../assets/images/mascot/simon-portrait.jpg'); flex-shrink:0; box-shadow:0 0 18px rgba(255,179,0,0.45); border:2px solid #FFB300; position:relative; z-index:1; }
.simon-text { flex:1; position:relative; z-index:1; }
.simon-name { font-size:13px; font-weight:800; color:#FFD740; letter-spacing:1.5px; }
.simon-msg { font-size:14px; color:#fff; margin-top:2px; line-height:1.4; }
/* 漢神金徽章 */
.hanshin-badge { display:inline-block; padding:4px 12px; background:linear-gradient(135deg,#FFB300,#FF8F00); color:#1A237E; font-weight:900; font-size:11px; letter-spacing:2px; border-radius:12px; box-shadow:0 2px 8px rgba(255,179,0,0.35); }
/* 寶山玄彬激勵彈幕 */
.simon-cheer { position:fixed; bottom:24%; left:50%; transform:translateX(-50%) scale(0); padding:14px 26px; background:linear-gradient(135deg,#1A237E,#FFB300); border:2px solid #FFD740; color:#fff; font-weight:900; font-size:18px; border-radius:20px; box-shadow:0 6px 30px rgba(255,179,0,0.55); z-index:300; pointer-events:none; }
.simon-cheer.show { animation:simonCheer 2.4s ease forwards; }
@keyframes simonCheer { 0%{transform:translateX(-50%) scale(0);opacity:0} 20%{transform:translateX(-50%) scale(1.1);opacity:1} 80%{transform:translateX(-50%) scale(1);opacity:1} 100%{transform:translateX(-50%) scale(0.9);opacity:0} }
@keyframes spin { to{transform:rotate(360deg)} }