:root{
  --ink:#101319; --surface:#181d27; --surface-2:#1f2530; --hairline:#2b323f;
  --text:#e8ebf1; --muted:#8b94a4; --faint:#5b6573;
  --amber:#f1b541; --nav:#f1b541; --teal:#46cda9; --red:#f06f66; --violet:#9a8cff;
  --mono:ui-monospace,"SF Mono","JetBrains Mono","Cascadia Code",Menlo,Consolas,monospace;
  --sans:system-ui,-apple-system,"Segoe UI","Noto Sans TC","PingFang TC","Microsoft JhengHei",sans-serif;
}
html{font-size:15px}
*{box-sizing:border-box}
body{margin:0;background:var(--ink);color:var(--text);font-family:var(--sans);font-size:1rem;line-height:1.5;transition:background .25s,color .25s}
a{color:var(--amber);text-decoration:none}a:hover{text-decoration:underline}
.eyebrow{font-family:var(--mono);font-size:0.733rem;letter-spacing:.18em;text-transform:uppercase;color:var(--faint)}
.mono{font-family:var(--mono)} .muted{color:var(--muted)}

.topbar{display:flex;align-items:center;gap:22px;padding:14px 22px;border-bottom:1px solid var(--hairline);
  background:linear-gradient(180deg,var(--surface),var(--ink));position:sticky;top:0;z-index:20}
.brand{font-family:var(--mono);font-weight:600;letter-spacing:.03em}
.brand b{color:var(--amber)} .brand .dot{color:var(--faint);margin:0 2px}
.nav{display:flex;gap:4px}
.nav a{color:var(--muted);font-size:0.933rem;padding:6px 14px;border-radius:8px;font-weight:500}
.nav a:hover{color:var(--text);background:var(--surface-2)}
.nav a[aria-current=page]{color:var(--text);background:var(--surface-2);box-shadow:inset 0 -2px 0 var(--nav)}
.status{margin-left:auto;display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:0.8rem;
  color:var(--muted);padding:6px 12px;border:1px solid var(--hairline);border-radius:999px;background:var(--surface)}
.status .led{width:8px;height:8px;border-radius:50%;background:var(--faint)}
.status[data-state=checking] .led{background:var(--amber);animation:pulse 1s ease-in-out infinite}
.status[data-state=online] .led{background:var(--teal);box-shadow:0 0 8px var(--teal)}
.status[data-state=warn] .led{background:var(--amber);box-shadow:0 0 8px var(--amber)}
.status[data-state=offline] .led{background:var(--red);box-shadow:0 0 8px var(--red)}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}

main{max-width:1000px;margin:0 auto;padding:34px 22px 80px}
.page-head{margin-bottom:22px}
.page-head h1{font-size:1.667rem;margin:6px 0 4px;letter-spacing:-.01em}
.page-head p{color:var(--muted);margin:0}
.section-gap{margin-top:30px}

.notice{border-radius:10px;padding:12px 14px;font-size:0.9rem;margin-bottom:16px;border:1px solid}
.notice.warn{color:#f4d58a;border-color:color-mix(in srgb,var(--amber) 35%,transparent);background:color-mix(in srgb,var(--amber) 8%,transparent)}
.notice.err{color:#f6a39c;border-color:color-mix(in srgb,var(--red) 40%,transparent);background:color-mix(in srgb,var(--red) 8%,transparent)}
.notice.ok{color:#a9e6d6;border-color:color-mix(in srgb,var(--teal) 40%,transparent);background:color-mix(in srgb,var(--teal) 8%,transparent)}

.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:16px;flex-wrap:wrap}

/* 卡片網格 */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:16px}
.card{background:var(--surface);border:1px solid var(--hairline);border-radius:14px;padding:18px;display:flex;flex-direction:column;gap:14px}
.card .head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px}
.card .who{display:flex;flex-direction:column;gap:3px;min-width:0}
.card .who .label{font-size:1.267rem;font-weight:600;line-height:1.2}
.card .who .id{font-family:var(--mono);font-size:0.733rem;color:var(--faint)}
.card .badge{font-family:var(--mono);font-size:0.733rem;padding:3px 9px;border-radius:999px;border:1px solid var(--hairline);white-space:nowrap}
.card .badge.on{color:var(--teal);border-color:color-mix(in srgb,var(--teal) 40%,transparent)}
.card .badge.off{color:var(--faint)}
.card .updated{font-size:0.767rem;color:var(--faint);font-family:var(--mono)}

.bm{display:flex;align-items:center;justify-content:center;gap:8px;text-decoration:none;cursor:grab;
  border:1px dashed color-mix(in srgb,var(--amber) 55%,transparent);color:var(--amber);
  background:color-mix(in srgb,var(--amber) 7%,transparent);border-radius:10px;padding:12px;font-weight:600;font-size:0.933rem;user-select:none}
.bm:hover{text-decoration:none;background:color-mix(in srgb,var(--amber) 12%,transparent)}
.bm:active{cursor:grabbing}
.bm svg{width:15px;height:15px;flex:none}
.hint{font-size:0.767rem;color:var(--faint);text-align:center;margin-top:-6px}

button{font:inherit;font-size:0.9rem;cursor:pointer;border-radius:9px;padding:8px 13px;border:1px solid var(--hairline);background:var(--surface-2);color:var(--text)}
button:hover{border-color:var(--faint)}
button:focus-visible{outline:2px solid var(--amber);outline-offset:2px}
button.primary{background:var(--amber);color:#1a1205;border-color:var(--amber);font-weight:600}
button.primary:hover{filter:brightness(1.06)}
button.ghost{background:transparent}
button.danger{color:var(--red);border-color:color-mix(in srgb,var(--red) 40%,transparent);background:transparent}
button.danger:hover{background:color-mix(in srgb,var(--red) 12%,transparent)}
button.full{width:100%}
button.sm{padding:6px 10px;font-size:0.867rem}

input[type=text],input[type=password],textarea,select.sel{width:100%;background:var(--ink);color:var(--text);
  border:1px solid var(--hairline);border-radius:9px;padding:10px 12px;font:inherit;font-size:0.9rem}
input[type=text],input[type=password]{font-family:var(--mono);font-size:0.867rem}
input:focus,textarea:focus,select:focus{outline:2px solid color-mix(in srgb,var(--amber) 60%,transparent);outline-offset:1px;border-color:var(--amber)}
label.field{display:block;margin-bottom:14px}
label.field>span{display:block;font-size:0.867rem;color:var(--muted);margin-bottom:6px}

.empty{text-align:center;color:var(--muted);padding:40px 20px;grid-column:1/-1}
.empty .eyebrow{margin-bottom:8px}

.toast{position:fixed;right:20px;bottom:20px;z-index:60;background:var(--surface-2);border:1px solid var(--hairline);
  border-radius:10px;padding:12px 16px;font-size:0.9rem;box-shadow:0 10px 30px rgba(0,0,0,.4);opacity:0;transform:translateY(8px);transition:all .2s}
.toast.show{opacity:1;transform:translateY(0)}
.toast.ok{border-left:3px solid var(--teal)} .toast.err{border-left:3px solid var(--red)}

pre{background:var(--ink);padding:12px 14px;border-radius:9px;border:1px solid var(--hairline);overflow:auto;color:var(--text);font-family:var(--mono);font-size:0.833rem}

/* ── 操作說明（美化版）─────────────────────────────────────────────── */
.guide{margin-top:30px;background:var(--surface);border:1px solid var(--hairline);border-radius:16px;padding:22px;
  background-image:linear-gradient(180deg,color-mix(in srgb,var(--amber) 5%,transparent),transparent 120px)}
.guide-head{display:flex;align-items:baseline;gap:10px;margin-bottom:18px;flex-wrap:wrap}
.guide-head h2{font-size:1.267rem;margin:0}
.guide-head .tag{font-size:0.8rem;color:var(--muted)}
.gsteps{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:18px}
@media (max-width:680px){.gsteps{grid-template-columns:1fr}}
.gstep{border:1px solid var(--hairline);border-radius:12px;padding:14px;background:var(--ink);position:relative}
.gstep .n{width:26px;height:26px;border-radius:8px;display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-weight:700;font-size:0.867rem;color:#1a1205;background:var(--amber);margin-bottom:9px}
.gstep h3{font-size:1rem;margin:0 0 5px}
.gstep p{font-size:0.867rem;color:var(--muted);margin:0;line-height:1.6}
.gstep .em{color:var(--text);font-weight:600}
.callout{display:flex;gap:11px;border:1px solid var(--hairline);border-radius:12px;padding:13px 15px;margin-top:11px;background:var(--ink)}
.callout .ic{font-size:1.133rem;line-height:1.4;flex:none}
.callout.tip{border-left:3px solid var(--teal)}
.callout.warn{border-left:3px solid var(--amber)}
.callout .ct{font-weight:600;font-size:0.933rem;margin-bottom:3px}
.callout .cb{font-size:0.867rem;color:var(--muted);line-height:1.65}
.callout .cb b{color:var(--text)}
.callout ol{margin:5px 0 0;padding-left:18px}
.callout ol li{margin-bottom:2px}
.kbd{font-family:var(--mono);font-size:0.8rem;padding:1px 7px;border:1px solid var(--hairline);border-radius:6px;background:var(--surface-2);color:var(--text)}
.foot-note{margin-top:18px;font-size:0.867rem;color:var(--muted);text-align:center}

/* ── 登入鎖 ───────────────────────────────────────────────────────── */
.lock-card{max-width:380px;margin:6vh auto 0}
.lock-ico{font-size:2rem;text-align:center;margin-bottom:6px}

/* ── 設定區段 ─────────────────────────────────────────────────────── */
.card.section{margin-bottom:20px}
.section-title{display:flex;align-items:center;gap:10px;margin-bottom:6px;flex-wrap:wrap}
.section-title h2{font-size:1.2rem;margin:0;width:100%;order:2}
.section-title .eyebrow{order:1}
.section-desc{font-size:0.833rem;color:var(--muted);margin:0 0 16px}
.subhead{font-size:0.8rem;color:var(--faint);font-family:var(--mono);letter-spacing:.12em;text-transform:uppercase;
  margin:18px 0 12px;padding-top:14px;border-top:1px solid var(--hairline)}
.subhead:first-of-type{border-top:0;padding-top:0;margin-top:0}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:0 16px}
@media (max-width:560px){.grid2{grid-template-columns:1fr}}
.color-row{display:flex;gap:8px;align-items:center}
input[type=color]{width:46px;height:40px;padding:2px;border:1px solid var(--hairline);border-radius:9px;background:var(--ink);cursor:pointer;flex:none}
.hex{flex:1}
input[type=range]{width:100%;accent-color:var(--amber);cursor:pointer;height:34px}
.swatches{display:flex;gap:7px;flex-wrap:wrap;margin-top:8px}
.sw{width:26px;height:26px;border-radius:7px;border:2px solid transparent;cursor:pointer;outline:1px solid var(--hairline)}
.sw[aria-selected=true]{border-color:var(--amber)}

/* ── 成員列 ───────────────────────────────────────────────────────── */
.urow{display:flex;align-items:center;gap:12px;justify-content:space-between;padding:13px 0;border-bottom:1px solid var(--hairline);flex-wrap:wrap}
.urow:last-child{border-bottom:0}
.umeta{min-width:0}
.uname{font-size:1rem;font-weight:600;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.uname .badge{font-family:var(--mono);font-size:0.7rem;padding:2px 8px;border-radius:999px;border:1px solid var(--hairline)}
.uname .badge.on{color:var(--teal);border-color:color-mix(in srgb,var(--teal) 40%,transparent)}
.uname .badge.off{color:var(--faint)}
.uid{font-size:0.733rem;color:var(--faint);margin-top:3px;font-family:var(--mono)}
.uacts{display:flex;gap:6px;flex-wrap:wrap}

@media (max-width:560px){.topbar{flex-wrap:wrap;gap:12px}.status{margin-left:0;order:3;width:100%;justify-content:center}main{padding:24px 16px 60px}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* ── 管理者操作手冊 ───────────────────────────────────────────────── */
.manual details{border:1px solid var(--hairline);border-radius:10px;margin-bottom:8px;background:var(--ink);overflow:hidden}
.manual summary{cursor:pointer;padding:11px 14px;font-weight:600;font-size:.933rem;list-style:none;display:flex;align-items:center;gap:8px}
.manual summary::-webkit-details-marker{display:none}
.manual summary::before{content:"▸";color:var(--amber);font-size:.8rem;transition:transform .15s}
.manual details[open] summary::before{transform:rotate(90deg)}
.manual .body{padding:2px 14px 13px;font-size:.867rem;color:var(--muted);line-height:1.75}
.manual .body b{color:var(--text)}
.manual .body ul,.manual .body ol{margin:6px 0;padding-left:20px}
.manual .body li{margin-bottom:4px}

/* ── 設定頁快捷列 ─────────────────────────────────────────────────── */
html{scroll-behavior:smooth}
.quicknav{display:flex;gap:8px;flex-wrap:wrap;position:sticky;top:49px;z-index:15;
  background:var(--ink);padding:11px 0;margin-bottom:16px;border-bottom:1px solid var(--hairline)}
.quicknav a{font-size:.867rem;color:var(--muted);padding:6px 13px;border:1px solid var(--hairline);
  border-radius:999px;background:var(--surface);text-decoration:none;white-space:nowrap}
.quicknav a:hover{color:var(--text);border-color:var(--nav);text-decoration:none}
.card.section{scroll-margin-top:108px}

/* ── #9 頁面外觀：收緊各項間距 ─────────────────────────────────────── */
#sec-appearance label.field{margin-bottom:9px}
#sec-appearance .grid2{gap:0 14px}
#sec-appearance .subhead{margin:14px 0 9px;padding-top:11px}
#sec-appearance .section-desc{margin-bottom:10px}
#sec-appearance .color-row{margin-top:0}