/* 光房子創意品牌色：深藍 #042f5e、黃 #ffe56d */
:root {
  --navy: #042f5e;
  --yellow: #ffe56d;

  --bg: #f3f5f8;
  --card: #fff;
  --text: #1c2430;
  --muted: #6b7686;
  --border: #d9dee6;
  --accent: var(--navy);
  --accent-text: #fff;
  --highlight: var(--yellow);
  --error: #c62828;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1420;
    --card: #14202f;
    --text: #e6e9ee;
    --muted: #97a1b0;
    --border: #27364a;
    /* 深藍在暗底上對比不足，改以品牌黃為主色 */
    --accent: var(--yellow);
    --accent-text: var(--navy);
    --highlight: var(--yellow);
    --error: #ff6b6b;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 48px 16px;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
}
.card {
  width: 100%;
  max-width: 520px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
}
/* --- 品牌識別 --- */
.brand { text-align: center; margin-bottom: 24px; }
/* logo 無底色，直接放在卡片上。
   亮底用深藍字版，暗底換成白字版，否則白字在白卡片上看不見 */
.brand-logo {
  width: 100%;
  max-width: 340px;
  aspect-ratio: 4 / 1;
  margin: 0 auto 18px;
  background: url("/brand/lockup.png") center / contain no-repeat;
}
@media (prefers-color-scheme: dark) {
  .brand-logo { background-image: url("/brand/lockup-dark.png"); }
}
.brand h1 {
  margin: 0;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--muted);
}
.site-footer {
  margin-top: 28px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}
.legal { display: block; }
.legal span { display: inline-block; white-space: nowrap; }
/* 官網連結：獨立一行並用主色，公司名稱則維持普通文字 */
.site-link {
  display: inline-block;
  margin-bottom: 12px;
  padding: 7px 16px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  color: var(--accent);
  text-decoration: none;
}
.site-link:hover { border-color: var(--accent); }

h1 { margin: 0 0 20px; font-size: 24px; text-align: center; }
.tabs { display: flex; gap: 8px; margin-bottom: 24px; }
.tab {
  flex: 1;
  padding: 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  border-radius: 10px;
  font-size: 15px;
  cursor: pointer;
}
.tab.active { border-color: var(--accent); color: var(--accent); font-weight: 600; }
.panel { display: none; }
.panel.active { display: block; }
.drop {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 36px 16px;
  border: 2px dashed var(--border);
  border-radius: 12px;
  cursor: pointer;
  text-align: center;
}
.drop.over { border-color: var(--accent); }
.drop span, .drop small, .muted { color: var(--muted); }
.drop small { font-size: 12px; }
.file-list { list-style: none; padding: 0; margin: 16px 0; }
.file-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  word-break: break-all;
}
.file-list .size { color: var(--muted); white-space: nowrap; font-size: 13px; }
.file-list .fname { flex: 1; min-width: 0; word-break: break-all; }
/* 下載鈕：用 <a> 但外觀比照按鈕 */
.dl-btn {
  flex: none;
  padding: 7px 16px;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-text);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
}
#download-found { margin: 0 0 4px; }
#download-found strong { color: var(--accent); }
#download-all { width: 100%; margin-top: 4px; }
#lookup-again { margin-top: 14px; }
.file-list .size + .remove { margin-left: 4px; }
/* 待上傳清單的移除鈕 */
.remove {
  flex: none;
  width: 26px;
  height: 26px;
  padding: 0;
  line-height: 1;
  font-size: 19px;
  border: none;
  border-radius: 50%;
  background: transparent;
  color: var(--muted);
}
.remove:hover { background: var(--border); color: var(--error); }
/* 取消上傳：低調的文字鈕，不與主要按鈕爭焦點 */
.link-btn {
  display: block;
  margin: 10px auto 0;
  padding: 4px 8px;
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  text-decoration: underline;
}
.link-btn:hover { color: var(--error); }
button {
  padding: 12px 18px;
  font-size: 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
}
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
button:disabled { opacity: .5; cursor: not-allowed; }
#upload-btn { width: 100%; }
.text, .code-input {
  width: 100%;
  padding: 12px;
  font-size: 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  margin-bottom: 12px;
}
.code-input {
  font-size: 40px;
  letter-spacing: 16px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}
#code-form button { width: 100%; }
.progress { margin-top: 16px; }
.progress-track {
  height: 12px;
  background: var(--border);
  border-radius: 6px;
  overflow: hidden;
}
#progress-fill { height: 100%; width: 0; background: var(--accent); transition: width .2s; }
.progress-info {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 8px;
  font-size: 13px;
  color: var(--muted);
}
#progress-pct { font-weight: 600; color: var(--text); font-variant-numeric: tabular-nums; }
#progress-rate { font-variant-numeric: tabular-nums; }
.code {
  font-size: 64px;
  font-weight: 700;
  letter-spacing: 18px;
  text-align: center;
  padding: 12px 0 12px 18px;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}
.row { display: flex; gap: 12px; }
.row button { flex: 1; }
#again-btn { width: 100%; margin-top: 12px; }
.error { color: var(--error); min-height: 1em; }
a { color: var(--accent); word-break: break-all; }