:root {
  --bg: #0e1117;
  --bg-soft: #161b24;
  --card: #1a212c;
  --border: #29323f;
  --text: #e6edf3;
  --dim: #8b98a9;
  --accent: #4c8dff;
  --accent-dim: #2f5fb0;
  --danger: #f0616d;
  --ok: #3fb950;
  --radius: 12px;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

html, body { margin: 0; padding: 0; }

body {
  background: radial-gradient(1200px 600px at 50% -10%, #1b2434 0%, var(--bg) 60%);
  color: var(--text);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei",
        "PingFang SC", "Hiragino Sans GB", Roboto, Helvetica, Arial, sans-serif;
  min-height: 100vh;
}

.wrap { max-width: 1180px; margin: 0 auto; padding: 28px 20px 64px; }

a { color: var(--accent); }

code {
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 6px;
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 0.9em;
}

/* ---------- 卡片 ---------- */

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}

.auth-card { max-width: 440px; margin: 8vh auto 0; padding: 32px 28px; }

.auth-card h1 { font-size: 22px; margin: 0 0 6px; display: flex; align-items: center; gap: 10px; }

.logo { font-size: 24px; line-height: 1; }

.sub { color: var(--dim); margin: 0 0 22px; font-size: 14px; }

.hint { color: var(--dim); font-size: 13px; margin: 20px 0 0; }

.steps { color: var(--text); font-size: 14px; padding-left: 22px; margin: 0 0 18px; }
.steps li { margin-bottom: 10px; }

.notice-inline {
  background: #0d1117;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--dim);
  margin: 0 0 18px;
}

/* ---------- 表单 ---------- */

form.inline { display: inline; margin: 0; }

.code-input {
  width: 100%;
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 30px;
  letter-spacing: 0.32em;
  text-align: center;
  padding: 14px 10px 14px 20px;
  margin-bottom: 14px;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}

.code-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(76, 141, 255, .18); }

button {
  font: inherit;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--text);
  padding: 9px 16px;
  cursor: pointer;
  transition: background .15s, border-color .15s, opacity .15s;
  white-space: nowrap;
}

button:hover { border-color: #3b4655; background: #202836; }

button.primary {
  width: 100%;
  background: var(--accent);
  border-color: var(--accent);
  color: #04101f;
  font-weight: 600;
  padding: 12px 16px;
  font-size: 16px;
}

button.primary:hover { background: #5f9bff; border-color: #5f9bff; }

button.ghost { font-size: 13px; padding: 6px 12px; background: transparent; }

button.danger { font-size: 13px; padding: 6px 12px; background: transparent; color: var(--danger); border-color: #4a2b30; }
button.danger:hover { background: #2a171b; border-color: var(--danger); }

button.copy.copied { color: var(--ok); border-color: #2c4a33; }

/* ---------- 提示条 ---------- */

.alert {
  background: #2a171b;
  border: 1px solid #573039;
  border-radius: 9px;
  color: #ffb4bb;
  padding: 10px 14px;
  font-size: 14px;
  margin: 0 0 16px;
}

.alert.ok { background: #10241a; border-color: #24503a; color: #8ee6ab; }

/* ---------- 顶栏 ---------- */

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 22px;
}

.brand { display: flex; align-items: center; gap: 10px; font-size: 17px; }

.badge {
  font-size: 12px;
  font-weight: 400;
  color: var(--dim);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 10px;
}

/* ---------- 上传区 ---------- */

.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 34px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  outline: none;
}

.dropzone:hover, .dropzone:focus-visible { border-color: var(--accent-dim); background: #182030; }
.dropzone.over { border-color: var(--accent); background: #16233a; }

.dz-title { margin: 0 0 6px; font-size: 16px; }
.dz-sub { margin: 2px 0 0; color: var(--dim); font-size: 13px; }

.progress { height: 4px; background: #0d1117; border-radius: 999px; overflow: hidden; margin-top: 14px; }

.progress .bar {
  height: 100%;
  width: 40%;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  animation: slide 1.1s ease-in-out infinite;
}

@keyframes slide {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}

.results { list-style: none; margin: 16px 0 0; padding: 0; font-size: 13px; }

.results li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  border-bottom: 1px solid #202836;
  word-break: break-all;
}

.results li:last-child { border-bottom: none; }
.results li.ok a { color: var(--ok); text-decoration: none; }
.results li.bad { color: #ffb4bb; }
.results li.hint-row { color: var(--dim); }

/* ---------- 统计 ---------- */

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  color: var(--dim);
  font-size: 13px;
  margin: 0 4px 18px;
}

.stats strong { color: var(--text); font-weight: 600; }

/* ---------- 图片网格 ---------- */

.folder-heading { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin: 0 4px 18px; }
.folder-heading h1 { margin: 0; font-size: 24px; }
.eyebrow { margin: 0 0 2px; color: var(--dim); font-size: 12px; }
.folder-count { color: var(--dim); font-size: 13px; }

.breadcrumb { display: flex; align-items: center; gap: 9px; margin: 0 4px 18px; font-size: 14px; }
.breadcrumb a { text-decoration: none; }
.breadcrumb span { color: var(--dim); }

.folder-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.folder-tile { display: flex; align-items: center; gap: 12px; min-width: 0; padding: 16px; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text); text-decoration: none; transition: border-color .15s, background .15s, transform .15s; }
.folder-tile:hover { border-color: var(--accent); background: #202a3a; transform: translateY(-1px); }
.folder-icon { font-size: 28px; line-height: 1; }
.folder-info { display: flex; flex-direction: column; min-width: 0; }
.folder-info strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.folder-info small { color: var(--dim); font-size: 12px; }
.folder-arrow { margin-left: auto; color: var(--dim); font-size: 22px; }

.file-list { overflow: hidden; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); }
.file-row { display: grid; grid-template-columns: auto minmax(0, 1fr) auto auto; align-items: center; gap: 14px; padding: 12px 16px; border-bottom: 1px solid var(--border); }
.file-row:last-child { border-bottom: 0; }
.file-row:hover { background: #202a3a; }
.file-icon { color: var(--accent); font-size: 20px; }
.file-meta { display: flex; flex-direction: column; min-width: 0; }
.file-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text); text-decoration: none; }
.file-name:hover { color: var(--accent); }
.file-row .actions { margin-top: 0; }
.file-row .move-form { min-width: 190px; }

.grid {
  display: grid;
  /* 文件浏览采用缩略图平铺，而不是一张图片占一整行。 */
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;
}

.tile {
  margin: 0;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.thumb {
  display: block;
  aspect-ratio: 4 / 3;
  height: auto;
  background:
    linear-gradient(45deg, #131922 25%, transparent 25%) 0 0 / 16px 16px,
    linear-gradient(-45deg, #131922 25%, transparent 25%) 0 8px / 16px 16px,
    linear-gradient(45deg, transparent 75%, #131922 75%) 8px -8px / 16px 16px,
    linear-gradient(-45deg, transparent 75%, #131922 75%) -8px 0 / 16px 16px,
    #0f141c;
  display: flex;
  align-items: center;
  justify-content: center;
}

.thumb img { width: 100%; height: 100%; object-fit: contain; display: block; }

.tile figcaption { padding: 10px; display: flex; flex-direction: column; gap: 8px; flex: 1; }

.meta { display: flex; flex-direction: column; gap: 2px; min-width: 0; }

.name {
  font-size: 13px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dim { color: var(--dim); font-size: 12px; }

.actions { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; }

.empty { color: var(--dim); text-align: center; padding: 40px 0; }

/* ---------- 相册 ---------- */

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.tab {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 13px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--text);
  text-decoration: none;
  font-size: 13px;
  transition: border-color .15s, background .15s;
}

.tab:hover { border-color: #3b4655; background: #202836; }

.tab.active { border-color: var(--accent); background: #16233a; color: #cfe0ff; }

.tab .n {
  font-size: 11px;
  color: var(--dim);
  background: #0d1117;
  border-radius: 999px;
  padding: 1px 7px;
}

.tab.active .n { color: #9dc0ff; }

select {
  font: inherit;
  font-size: 13px;
  background: #0d1117;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 9px;
  max-width: 100%;
}

select:focus { outline: none; border-color: var(--accent); }

input[type="text"] {
  font: inherit;
  font-size: 14px;
  background: #0d1117;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 11px;
  width: 100%;
  outline: none;
}

input[type="text"]:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(76, 141, 255, .14); }

.upload-target {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  font-size: 13px;
  color: var(--dim);
}

.move-form { display: flex; gap: 6px; align-items: center; }
.move-form select { flex: 1; min-width: 0; }

.album-admin { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }

.album-edit {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px;
  margin: 0;
  flex: 1;
  min-width: 0;
}

.album-edit .field { display: flex; flex-direction: column; gap: 4px; min-width: 160px; flex: 1; }
.album-edit .field label { font-size: 12px; color: var(--dim); }
.field-hint { font-size: 11px; color: var(--dim); }

button.primary.compact { width: auto; font-size: 14px; padding: 9px 20px; }

.new-album summary, .new-album > summary {
  cursor: pointer;
  color: var(--dim);
  font-size: 14px;
}

.new-album[open] > summary { margin-bottom: 14px; }

/* ---------- 绑定页的二维码 ---------- */

.setup-card { max-width: 520px; }

.qr-block { text-align: center; margin: 0 0 18px; }

.qr {
  width: 260px;
  max-width: 100%;
  height: auto;
  background: #fff;
  border-radius: 10px;
  padding: 10px;
  /* 二维码必须是纯黑白、边缘锐利，加滤镜或缩放插值都会让扫描率骤降 */
  image-rendering: pixelated;
  box-shadow: 0 4px 20px rgba(0, 0, 0, .35);
}

.qr-hint { color: var(--dim); font-size: 13px; margin: 10px 0 0; }

.fallback {
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 10px 14px;
  margin: 0 0 18px;
  font-size: 13px;
}

.fallback summary { cursor: pointer; color: var(--dim); }
.fallback[open] summary { margin-bottom: 10px; }

.kv { display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; margin: 0; align-items: baseline; }
.kv dt { color: var(--dim); white-space: nowrap; }
.kv dd { margin: 0; min-width: 0; }

.secret { letter-spacing: .08em; word-break: break-all; }

.uri-hint { margin-top: 12px; }
.uri { word-break: break-all; font-size: 12px; line-height: 1.5; }

@media (max-width: 560px) {
  .wrap { padding: 18px 14px 48px; }
  .auth-card { padding: 24px 20px; }
  .code-input { font-size: 26px; }

  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .tile figcaption { padding: 8px; }
  .actions button, .actions a, .move-form button { padding-left: 8px; padding-right: 8px; }
  .folder-heading { align-items: start; flex-direction: column; gap: 2px; }
  .folder-grid { grid-template-columns: 1fr; }
  .file-row { grid-template-columns: auto minmax(0, 1fr); gap: 8px 10px; }
  .file-row .actions, .file-row .move-form { grid-column: 2; min-width: 0; }
}