:root{
  --ink:#f7fbfa;
  --ink-dim:rgba(247,251,250,.62);
  --ink-faint:rgba(247,251,250,.34);
  --line:rgba(255,255,255,.22);
  --panel:rgba(14,26,34,.28);
  --accent:#f6cd88;
  --mint:#96dcc0;
  --shadow:0 1px 18px rgba(6,16,24,.45);
  --ease:cubic-bezier(.22,.61,.36,1);
  --sans:"Helvetica Neue",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang TC","Noto Sans TC","Microsoft JhengHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overflow:hidden;background:#0a1118}
body{
  font-family:var(--sans);
  color:var(--ink);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  touch-action:none;
}
canvas#scene{position:fixed;inset:0;display:block;width:100%;height:100%}

/* ── 大氣 ─────────────────────────────────── */
#vignette{
  position:fixed;inset:0;pointer-events:none;z-index:2;
  background:radial-gradient(120% 90% at 50% 46%,transparent 42%,rgba(6,14,22,.30) 78%,rgba(4,10,16,.62) 100%);
}
#grain{
  position:fixed;inset:-50%;pointer-events:none;z-index:3;opacity:.045;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/></filter><rect width='120' height='120' filter='url(%23n)'/></svg>");
  animation:grain 7s steps(6) infinite;
}
@keyframes grain{
  0%{transform:translate3d(0,0,0)}   20%{transform:translate3d(-2%,1.5%,0)}
  40%{transform:translate3d(1.5%,-1%,0)} 60%{transform:translate3d(-1%,-2%,0)}
  80%{transform:translate3d(2%,1%,0)}    100%{transform:translate3d(0,0,0)}
}

/* ── 畫面層 ───────────────────────────────── */
.screen{
  position:fixed;inset:0;z-index:10;display:grid;place-content:center;
  text-align:center;padding:6vh 6vw;gap:14px;
  background:radial-gradient(115% 80% at 50% 40%,rgba(12,24,34,.42),rgba(6,12,18,.86) 72%);
  backdrop-filter:blur(14px) saturate(120%);
  transition:opacity .85s var(--ease),visibility .85s;
}
.screen.hidden{opacity:0;visibility:hidden;pointer-events:none}

.brand{font-size:clamp(26px,4.4vw,42px);font-weight:300;letter-spacing:.42em;text-indent:.42em}
.brand-sub{color:var(--ink-faint);font-size:11px;letter-spacing:.34em;text-transform:uppercase}
.mark{justify-self:center;position:relative;width:52px;height:52px;margin-bottom:10px}
.mark-ring{position:absolute;inset:0;border:1px solid var(--line);border-radius:50%;border-top-color:var(--accent);animation:spin 2.6s linear infinite}
.mark-dot{position:absolute;left:50%;top:50%;width:7px;height:7px;margin:-3.5px;border-radius:50%;background:var(--accent);box-shadow:0 0 14px var(--accent)}
@keyframes spin{to{transform:rotate(360deg)}}
.bar{justify-self:center;width:min(320px,68vw);height:1px;background:var(--line);overflow:hidden;margin-top:8px}
.bar>i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--mint),var(--accent));transition:width .4s var(--ease)}
.bar.thin{width:100%;margin:6px 0 10px}
.loadstep{color:var(--ink-faint);font-size:11px;letter-spacing:.24em}

/* ── 標題 ─────────────────────────────────── */
.eyebrow{font-size:10px;letter-spacing:.4em;text-transform:uppercase;color:var(--ink-faint)}
.title{font-size:clamp(34px,7vw,68px);font-weight:200;letter-spacing:.2em;text-indent:.2em;line-height:1.1}
.lede{color:var(--ink-dim);font-size:14px;line-height:2.1;font-weight:300;margin-top:4px}
.hl{color:var(--accent)}
.cta{
  justify-self:center;margin-top:14px;cursor:pointer;
  font:inherit;font-size:13px;letter-spacing:.34em;text-indent:.34em;color:var(--ink);
  padding:15px 46px;background:transparent;border:1px solid var(--line);border-radius:999px;
  transition:.4s var(--ease);
}
.cta:hover{background:rgba(255,255,255,.07);border-color:var(--accent);letter-spacing:.42em}
.keys{
  display:flex;flex-wrap:wrap;gap:8px 22px;justify-content:center;margin-top:26px;
  font-size:11px;color:var(--ink-faint);letter-spacing:.12em
}
.keys .k{color:var(--ink-dim);border:1px solid var(--line);border-radius:4px;padding:2px 7px;margin-right:6px;font-size:10px}
.tiny{margin-top:16px;font-size:10px;letter-spacing:.2em;color:var(--ink-faint)}

/* ── HUD ──────────────────────────────────── */
#hud{position:fixed;inset:0;z-index:5;pointer-events:none;transition:opacity .5s var(--ease)}
#hud.hidden,#hud.off{opacity:0}
.panel{
  position:absolute;top:22px;display:flex;flex-direction:column;
  padding:14px 18px;min-width:150px;border:1px solid var(--line);border-radius:14px;
  background:var(--panel);backdrop-filter:blur(16px) saturate(130%);box-shadow:var(--shadow)
}
.panel-left{left:22px}
.panel-right{right:22px;align-items:flex-end;min-width:0;gap:10px}
.stat{display:flex;align-items:baseline;justify-content:space-between;gap:16px}
.label{font-size:10px;letter-spacing:.34em;color:var(--ink-dim)}
.value{font-variant-numeric:tabular-nums;font-size:15px;font-weight:300;letter-spacing:.06em}
.value b{font-weight:500;color:var(--accent)}
.value i{font-style:normal;color:var(--ink-faint);font-size:12px}
.sep{margin:0 3px;color:var(--ink-faint)}
.clock{font-variant-numeric:tabular-nums;font-size:22px;font-weight:200;letter-spacing:.14em}
.phase{font-size:11px;letter-spacing:.3em;color:var(--mint);margin-left:10px}
.tools{display:flex;gap:8px;pointer-events:auto}
.tool{
  cursor:pointer;width:32px;height:32px;display:grid;place-items:center;border-radius:50%;
  border:1px solid var(--line);background:transparent;color:var(--ink-dim);transition:.3s var(--ease)
}
.tool:hover{color:var(--ink);border-color:var(--accent)}
.tool:focus{outline:none}
.tool:focus-visible{color:var(--ink);border-color:var(--mint)}
.tool:active{transform:scale(.9);transition-duration:.08s}
.icon{fill:currentColor}
.icon.stroke{fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round}
#mute.off #wave1,#mute.off #wave2{opacity:.15}

.compass{position:absolute;right:34px;bottom:30px;width:64px;height:64px;opacity:.85;transition:opacity .4s}
.compass .dial{fill:rgba(10,20,28,.24);stroke:var(--line);stroke-width:1}
.compass .arrow{fill:var(--accent)}
#needle{transform-origin:32px 32px;transition:transform .25s var(--ease)}
.compass .dist{
  position:absolute;left:50%;bottom:-16px;transform:translateX(-50%);
  font-size:9.5px;letter-spacing:.18em;color:var(--ink-dim);white-space:nowrap
}

#toast{
  position:absolute;left:50%;top:14vh;transform:translate(-50%,-6px);
  padding:12px 26px;border:1px solid var(--line);border-radius:999px;
  background:var(--panel);backdrop-filter:blur(16px);
  font-size:13px;letter-spacing:.2em;opacity:0;transition:.6s var(--ease);white-space:nowrap
}
#toast.show{opacity:1;transform:translate(-50%,0)}
#toast .sub{display:block;margin-top:5px;font-size:10px;letter-spacing:.28em;color:var(--ink-faint)}

.hint{
  position:absolute;left:50%;bottom:34px;transform:translateX(-50%);
  font-size:11px;letter-spacing:.24em;color:var(--ink-dim);transition:opacity 1.4s var(--ease)
}
.hint.gone{opacity:0}

@media (max-width:760px){
  .panel{top:14px;padding:11px 13px;min-width:126px;border-radius:11px}
  .panel-left{left:14px}.panel-right{right:14px}
  .compass{right:18px;bottom:18px;transform:scale(.86);transform-origin:bottom right}
  .hint{font-size:10px;letter-spacing:.16em}
  .lede{font-size:12.5px;line-height:2}
}
@media (prefers-reduced-motion:reduce){
  #grain{animation:none}
  .mark-ring{animation-duration:6s}
}