/* 共用：色票、字體、重設、按鈕、登入卡。新藝術配色，單一視覺世界，不切換深淺主題。 */
:root{
  --sea-deep:#0F2633;
  --sea:#235E86;
  --moss:#557F3B;
  --lake:#3AA39C;
  --lake-soft:#A6D6CE;
  --amber:#F0A23C;
  --brass:#C8A45E;
  --paper:#EDE6D3;
  --paper-2:#E1D6BB;
  --ink:#1A2B2C;
  --ink-soft:#52615C;
  --glass:rgba(12,32,43,.62);
  --hair:rgba(200,164,94,.5);
  --danger:#B5473A;
  --f-display:"Cinzel Decorative","Cinzel",Georgia,serif;
  --f-poem:"Cormorant Garamond",Georgia,serif;
  --f-han:"Noto Serif TC","Songti TC","PMingLiU",serif;
  --f-ui:-apple-system,BlinkMacSystemFont,"SF Pro Text","PingFang TC","Noto Sans TC","Microsoft JhengHei",system-ui,sans-serif;
  --ease-ios:cubic-bezier(.32,.72,0,1);
  --spring:cubic-bezier(.34,1.4,.64,1);
  color-scheme:dark;
}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html,body{height:100%;margin:0}
body{background:var(--sea-deep);color:var(--paper);font:14px/1.5 var(--f-ui);-webkit-tap-highlight-color:transparent;-webkit-text-size-adjust:100%}
img{max-width:100%}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;padding:0}
button:focus-visible,input:focus-visible,a:focus-visible{outline:2px solid var(--amber);outline-offset:3px}
.press{transition:transform .25s var(--spring)}
.press:active{transform:scale(.94)}
.chip{display:inline-flex;align-items:center;gap:6px;height:32px;padding:0 12px;border-radius:999px;background:var(--glass);backdrop-filter:blur(16px) saturate(1.4);-webkit-backdrop-filter:blur(16px) saturate(1.4);font-size:13px;font-weight:600;border:1px solid rgba(237,230,211,.08);color:var(--paper);text-decoration:none}
.chip svg{width:16px;height:16px}
.cta{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;height:52px;border-radius:14px;background:var(--sea-deep);color:var(--paper);font-size:17px;font-weight:600;letter-spacing:.06em}
.cta:disabled{opacity:.45}
.cta svg{width:20px;height:20px}

/* 登入卡（大螢幕、相簿、後台共用） */
.gate{position:fixed;inset:0;z-index:100;display:grid;place-items:center;background:var(--paper);color:var(--ink);color-scheme:light;
  padding:24px max(16px,env(safe-area-inset-right,0px)) 24px max(16px,env(safe-area-inset-left,0px))}
.gate form{width:min(100%,340px);display:grid;gap:14px;text-align:center}
.gate h1{font-family:var(--f-han);font-size:28px;letter-spacing:.16em;margin:0;padding-left:.16em}
.gate p{margin:0;color:var(--ink-soft);font-size:14px;line-height:1.7}
.gate input{width:100%;height:52px;border-radius:14px;border:1px solid rgba(26,43,44,.15);background:rgba(255,255,255,.6);font:20px var(--f-ui);text-align:center;letter-spacing:.3em;color:var(--ink)}
.gate .err{color:var(--danger);font-size:13px;min-height:1.2em}
.gate .lock{font-family:var(--f-display);font-size:20px;color:var(--brass)}

/* 動態島通知 */
.island{position:fixed;top:calc(env(safe-area-inset-top,0px) + 10px);left:50%;transform:translateX(-50%) scale(.6);opacity:0;z-index:90;display:flex;align-items:center;gap:10px;background:#000;color:var(--paper);border-radius:999px;padding:10px 18px 10px 10px;font-size:14px;font-weight:600;transition:transform .5s var(--spring),opacity .3s;pointer-events:none;white-space:nowrap;max-width:calc(100vw - 32px)}
.island.on{transform:translateX(-50%) scale(1);opacity:1}
.island img{width:30px;height:30px;border-radius:50%;object-fit:cover}
.island span{overflow:hidden;text-overflow:ellipsis}

@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}