:root {
  color-scheme: light;
  --ice-canvas: #ECFEFD;
  --ice-panel: #F3FDFD;
  --ice-surface: #FBFFFF;
  --ice-input: #FCFFFF;
  --ice-outline: #9ADFE2;
  --ice-accent: #16C5CD;
  --ice-accent-ink: #075E78;
  --ice-text: #073554;
  --ice-muted: #426B7C;
  --ice-hover: #E2FBFC;
  --ice-success: #356655;
  --ice-warning: #89601B;
  --ice-danger: #AC4252;
  --ice-window: linear-gradient(135deg, #FFFFFF 0%, #EDFEFD 42%, #D9F8F7 100%);
  --ice-primary: linear-gradient(135deg, #89E0D0 0%, #48CABC 50%, #23AF9F 100%);
  --shadow-button: 0 3px 8px rgba(34, 94, 102, 0.063);
  --shadow-hover-glow: 0 0 9px rgba(22, 197, 205, 0.27);
  --shadow-selected-glow: 0 0 11px 1px rgba(22, 197, 205, 0.44), 0 2px 4px rgba(10, 90, 113, 0.094);
  --shadow-card: 0 10px 30px rgba(34, 94, 102, 0.078);
  --radius-window: 16px;
  --radius-card: 10px;
  --radius-control: 8px;
  --font-ui: "Microsoft JhengHei", "PingFang TC", "Heiti TC", "Segoe UI", Arial, sans-serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body { min-height: 100%; }

body {
  margin: 0;
  background: var(--ice-window), var(--ice-canvas);
  background-attachment: fixed;
  color: var(--ice-text);
  font-family: var(--font-ui);
  font-size: 15px;
  -webkit-text-size-adjust: 100%;
}

.shell {
  max-width: 480px;
  margin: 0 auto;
  padding: calc(env(safe-area-inset-top) + 12px) 16px calc(env(safe-area-inset-bottom) + 24px);
  display: grid;
  gap: 14px;
}

#mainView { display: grid; gap: 14px; }
.top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.page-title { font-size: 26px; font-weight: 300; margin: 0; }
.section-title { font-size: 18px; font-weight: 700; color: var(--ice-accent-ink); margin: 0 0 10px; }
.hint { font-size: 13px; color: var(--ice-muted); margin: 0 0 12px; line-height: 1.5; }
.status { font-size: 13px; color: var(--ice-warning); margin: 10px 0 0; min-height: 1em; }
.status.error { color: var(--ice-danger); }
.status.ok { color: var(--ice-success); }

.pill {
  background: var(--ice-surface);
  border: 1.5px solid var(--ice-outline);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 13px;
  white-space: nowrap;
}

.card {
  background: var(--ice-surface);
  border: 1.5px solid var(--ice-outline);
  border-radius: var(--radius-card);
  padding: 18px;
  box-shadow: var(--shadow-card);
}

.btn {
  background: var(--ice-surface);
  color: var(--ice-text);
  border: 1.5px solid var(--ice-outline);
  border-radius: var(--radius-control);
  padding: 10px 14px;
  min-height: 44px;
  box-shadow: var(--shadow-button);
  font: inherit;
  cursor: pointer;
  touch-action: manipulation;
}
.btn:hover { box-shadow: var(--shadow-hover-glow); color: var(--ice-accent-ink); }
.btn:focus-visible { box-shadow: var(--shadow-selected-glow); outline: none; }
.btn:active { opacity: 0.88; }
.btn:disabled { opacity: 0.45; box-shadow: none; cursor: default; }
.btn.primary { background: var(--ice-primary); border-color: transparent; font-weight: 700; box-shadow: var(--shadow-selected-glow); }
.btn.danger { color: var(--ice-danger); justify-self: center; }
.btn.wide { width: 100%; margin-top: 12px; }

.grid { display: grid; grid-template-columns: auto 1fr; gap: 8px 14px; font-size: 15px; }
.label { color: var(--ice-muted); }

.check { display: flex; align-items: center; gap: 8px; margin-top: 12px; color: var(--ice-muted); font-size: 14px; }
.check input { width: 20px; height: 20px; accent-color: #23AF9F; }

.scan { margin-top: 12px; display: grid; gap: 8px; }
.scan video { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: var(--radius-control); background: var(--ice-panel); border: 1.5px solid var(--ice-outline); }

/* 畫面（上）＋導覽列（下）直向排列，導覽列不蓋到畫面 */
.screen { margin-top: 14px; display: flex; flex-direction: column; background: var(--ice-panel); border: 1.5px solid var(--ice-outline); border-radius: var(--radius-control); overflow: hidden; }
.screen-view { position: relative; display: grid; place-items: center; min-height: 0; }
.screen-view video { display: block; width: 100%; max-height: 66vh; object-fit: contain; background: var(--ice-panel); }
.focus-toggle { position: absolute; right: 8px; top: 8px; z-index: 2; min-height: 36px; padding: 6px 10px; opacity: 0.92; }

/* 透明層：吃掉手指動作傳給 Android，不讓頁面自己捲動 */
.touch-layer { position: absolute; inset: 0; z-index: 1; touch-action: none; }

.nav-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  padding: 6px;
  border-top: 1.5px solid var(--ice-outline);
  background: var(--ice-surface);
}
.nav-key { min-height: 40px; padding: 6px 4px; font-size: 14px; }

.screen.focus {
  position: fixed;
  inset: 0;
  z-index: 10;
  margin: 0;
  border: 0;
  border-radius: 0;
  background: var(--ice-canvas);
  padding-top: env(safe-area-inset-top);
}
.screen.focus .screen-view { flex: 1; }
.screen.focus .screen-view video { width: 100%; height: 100%; max-height: none; }
.screen.focus .focus-toggle { top: calc(env(safe-area-inset-top) + 12px); right: 12px; }
.screen.focus .nav-bar { padding: 8px 8px calc(env(safe-area-inset-bottom) + 8px); }

.manual { margin-top: 14px; }
.manual summary, .log summary { cursor: pointer; color: var(--ice-accent-ink); font-weight: 700; }
textarea {
  width: 100%;
  margin-top: 10px;
  background: var(--ice-input);
  color: var(--ice-text);
  border: 1.5px solid var(--ice-outline);
  border-radius: var(--radius-control);
  padding: 8px;
  font: 13px ui-monospace, Menlo, Consolas, monospace;
  word-break: break-all;
}
textarea:focus-visible { outline: none; box-shadow: var(--shadow-selected-glow); }

.log ol { margin: 10px 0 0; padding-left: 20px; font-size: 13px; color: var(--ice-muted); display: grid; gap: 4px; }
.diag { margin: 8px 0 0; font-size: 12px; word-break: break-all; }

.quality-row { display: flex; align-items: center; gap: 8px; margin-top: 12px; }
.quality-row .label { font-size: 14px; }
.q-opt { flex: 1; min-height: 40px; }
.q-opt.active { background: var(--ice-primary); border-color: transparent; font-weight: 700; box-shadow: var(--shadow-selected-glow); }