* { box-sizing: border-box; }
:root {
  --bg: #0f1419; --panel: #1a212b; --panel2: #232c38;
  --line: #2e3a48; --text: #e6edf3; --muted: #8b98a8;
  --accent: #3b82f6; --green: #22c55e; --red: #ef4444;
  --amber: #f59e0b;
}
body {
  margin: 0; font-family: -apple-system, "Segoe UI", "PingFang TC", "Microsoft JhengHei", sans-serif;
  background: var(--bg); color: var(--text); height: 100vh; overflow: hidden;
}
.hidden { display: none !important; }
h1, h2, h3 { margin: 0; }
.tag { font-size: .55em; background: var(--accent); padding: 2px 6px; border-radius: 5px; vertical-align: middle; }
button {
  background: var(--accent); color: #fff; border: none; padding: 8px 14px;
  border-radius: 7px; cursor: pointer; font-size: 14px;
}
button:hover { filter: brightness(1.1); }
button:disabled { background: #3a4452; cursor: not-allowed; }
button.small { padding: 5px 10px; font-size: 13px; }
button.ghost { background: transparent; border: 1px solid var(--line); }
input, textarea, select {
  background: var(--panel2); color: var(--text); border: 1px solid var(--line);
  border-radius: 6px; padding: 7px 9px; font-size: 14px; width: 100%;
}
label { display: block; font-size: 13px; color: var(--muted); margin: 6px 0; }
label input, label textarea, label select { margin-top: 4px; }
.err { color: var(--red); font-size: 13px; min-height: 18px; margin-top: 6px; }
.muted { color: var(--muted); font-size: 13px; }

/* gate */
.gate {
  position: fixed; inset: 0; overflow-y: auto; z-index: 50;
  display: flex; align-items: center; justify-content: center; padding: 32px;
  background:
    radial-gradient(900px 500px at 15% 0%, rgba(59,130,246,.16), transparent 60%),
    radial-gradient(700px 500px at 100% 100%, rgba(34,197,94,.10), transparent 55%),
    var(--bg);
}
.gate-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 48px; max-width: 1100px; width: 100%; align-items: center; }

/* 左：介紹 */
.intro .brand { font-size: 44px; letter-spacing: .5px; }
.intro .lead { color: var(--muted); font-size: 16px; line-height: 1.7; margin: 14px 0 28px; }
.intro-block { margin-top: 22px; }
.intro-block h3 { font-size: 14px; text-transform: uppercase; letter-spacing: 1px; color: var(--accent); margin-bottom: 12px; }
.feat { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.feat li { position: relative; padding-left: 24px; font-size: 14px; color: var(--text); line-height: 1.5; }
.feat li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--green); font-weight: 700; }
.feat b { color: #fff; }
.cases { display: flex; flex-wrap: wrap; gap: 8px; }
.case { background: var(--panel2); border: 1px solid var(--line); border-radius: 20px; padding: 7px 13px; font-size: 13px; color: var(--text); }

/* 右：登入卡 */
.gate-box { background: var(--panel); padding: 36px; border-radius: 16px; width: 100%; max-width: 360px; text-align: center; border: 1px solid var(--line); box-shadow: 0 20px 60px rgba(0,0,0,.4); }
.gate-box h2 { font-size: 24px; }
.gate-box p { color: var(--muted); margin-top: 6px; }
.gate-box input { margin: 20px 0 12px; }
.gate-box button { width: 100%; }

@media (max-width: 860px) {
  .gate { align-items: flex-start; }
  .gate-grid { grid-template-columns: 1fr; gap: 32px; max-width: 460px; }
  .gate-box { max-width: none; margin: 0 auto; }
  .intro .brand { font-size: 34px; }
}

/* layout */
.app { display: flex; flex-direction: column; height: 100vh; }
header { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; padding: 12px 18px; border-bottom: 1px solid var(--line); }
.status { display: flex; gap: 8px; flex-wrap: wrap; }
.badge { background: var(--panel2); padding: 4px 9px; border-radius: 6px; font-size: 12px; color: var(--muted); }
.badge.ok { color: var(--green); } .badge.bad { color: var(--red); }
main { display: grid; grid-template-columns: 1.1fr 1fr 1fr; gap: 12px; padding: 12px; flex: 1; min-height: 0; }
.col { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 12px; display: flex; flex-direction: column; min-height: 0; }
.col-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }

/* camera */
.video-wrap { position: relative; background: #000; border-radius: 10px; overflow: hidden; aspect-ratio: 4/3; display: flex; align-items: center; justify-content: center; }
.busy-overlay { position: absolute; top: 10px; left: 10px; background: rgba(59,130,246,.92); color: #fff; padding: 5px 11px; border-radius: 7px; font-size: 13px; font-weight: 600; display: flex; gap: 4px; align-items: center; }
.busy-overlay::before { content: ""; width: 9px; height: 9px; border-radius: 50%; background: #fff; animation: pulse 1s infinite; }
@keyframes pulse { 0%,100% { opacity: 1; } 50% { opacity: .2; } }
video { width: 100%; height: 100%; object-fit: cover; }
.controls { display: flex; gap: 10px; align-items: end; margin-top: 12px; flex-wrap: wrap; }
.controls label { margin: 0; flex: 1; min-width: 90px; }
.tg-setup { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line); display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

/* rules */
.rules-list { overflow-y: auto; flex: 1; display: flex; flex-direction: column; gap: 8px; }
.rule { background: var(--panel2); border: 1px solid var(--line); border-radius: 9px; padding: 10px; }
.rule-top { display: flex; align-items: center; gap: 8px; }
.dot { width: 11px; height: 11px; border-radius: 50%; background: #555; flex-shrink: 0; }
.dot.on { background: var(--green); } .dot.fire { background: var(--red); box-shadow: 0 0 8px var(--red); }
.dot.cool { background: var(--amber); }
.rule-name { font-weight: 600; flex: 1; }
.rule-meta { font-size: 12px; color: var(--muted); margin-top: 5px; }
.rule-actions { display: flex; gap: 6px; }
.rule-actions button { padding: 3px 8px; font-size: 12px; }
.switch { cursor: pointer; font-size: 12px; user-select: none; }

/* log */
.log { overflow-y: auto; flex: 1; font-family: ui-monospace, monospace; font-size: 12px; line-height: 1.5; }
.log-entry { padding: 6px 8px; border-bottom: 1px solid var(--line); }
.log-entry .t { color: var(--muted); }
.log-entry.fire { background: rgba(239,68,68,.12); }
.log-entry.fire .head { color: var(--red); font-weight: 600; }

/* modal */
.modal { position: fixed; inset: 0; background: rgba(0,0,0,.6); display: flex; align-items: center; justify-content: center; z-index: 40; }
.modal { padding: 16px; }
.modal-box { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; padding: 22px; width: min(460px, 100%); max-height: 90vh; overflow-y: auto; }
.modal-box h3 { margin-bottom: 10px; }
.row { display: flex; gap: 10px; }
.row label { flex: 1; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 16px; }

/* ---- RWD ---------------------------------------------------------------- */

/* 平板：相機置頂滿版，規則 / Log 並排於下；改為頁面捲動 */
@media (max-width: 1024px) {
  body { overflow: auto; height: auto; }
  .app { height: auto; min-height: 100vh; }
  main {
    grid-template-columns: 1fr 1fr;
    grid-template-areas: "cam cam" "rules log";
    overflow: visible;
  }
  .cam-col { grid-area: cam; }
  .rules-col { grid-area: rules; }
  .log-col { grid-area: log; }
  .rules-list, .log { max-height: 55vh; }
}

/* 手機：全部單欄堆疊 */
@media (max-width: 680px) {
  header { padding: 10px 14px; }
  header h1 { font-size: 20px; }
  main {
    grid-template-columns: 1fr;
    grid-template-areas: "cam" "rules" "log";
    gap: 10px; padding: 10px;
  }
  .rules-list, .log { max-height: 50vh; }
  .controls label { min-width: 70px; }
  .intro .brand { font-size: 28px; }
  .intro .lead { font-size: 15px; }
}