*, *::before, *::after { box-sizing: border-box; }

:root {
  --bg:            #0f172a;
  --surface:       #1e293b;
  --surface-raised:#253348;
  --border:        #334155;
  --text:          #f1f5f9;
  --text-muted:    #94a3b8;
  --text-dim:      #64748b;
  --accent:        #3b82f6;
  --accent-hover:  #2563eb;
  --danger:        #f87171;
  --danger-bg:     rgba(248,113,113,0.1);
  --danger-border: rgba(248,113,113,0.3);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  min-height: 100vh;
}

/* ── Header ── */

header {
  position: sticky;
  top: 0;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  z-index: 100;
  gap: 16px;
}

header a {
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.15s;
}
header a:hover { color: var(--accent); }

header h1 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
}

/* ── Layout ── */

.container {
  max-width: 960px;
  margin: 24px auto;
  padding: 0 16px;
}

/* ── Toolbar ── */

.toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

#breadcrumb {
  flex: 1;
  font-size: 13px;
  color: var(--text-muted);
  min-width: 0;
}

.crumb {
  cursor: pointer;
  color: var(--accent);
  transition: opacity 0.15s;
}
.crumb:hover { opacity: 0.75; }
.sep { color: var(--border); margin: 0 4px; }

/* ── Buttons ── */

.btn {
  padding: 6px 14px;
  border-radius: 6px;
  border: 1px solid transparent;
  font-size: 13px;
  cursor: pointer;
  font-weight: 500;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  white-space: nowrap;
  font-family: inherit;
}
.btn-primary {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-secondary {
  background: var(--surface);
  color: var(--text-muted);
  border-color: var(--border);
}
.btn-secondary:hover { background: var(--surface-raised); color: var(--text); }

/* ── Upload panel ── */

#upload-panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 16px;
}

.upload-controls {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

#password {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  outline: none;
  width: 160px;
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
}
#password:focus { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(59,130,246,0.2); }
#password::placeholder { color: var(--text-dim); }

.file-btn-label {
  display: inline-block;
  padding: 6px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 13px;
  cursor: pointer;
  font-weight: 500;
  color: var(--text-muted);
  transition: background 0.15s, color 0.15s;
  user-select: none;
}
.file-btn-label:hover { background: var(--surface-raised); color: var(--text); }
.file-btn-label input { display: none; }

#drop-zone {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 28px;
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
  transition: all 0.15s;
}
#drop-zone.dragover {
  border-color: var(--accent);
  background: rgba(59,130,246,0.08);
  color: var(--accent);
}

#upload-queue {
  margin-top: 12px;
  max-height: 180px;
  overflow-y: auto;
}

.queue-item {
  padding: 5px 10px;
  font-size: 12px;
  border-radius: 6px;
  margin-bottom: 3px;
  background: var(--surface-raised);
  color: var(--text-muted);
  word-break: break-all;
}
.queue-item.done   { background: rgba(34,197,94,0.12); color: #4ade80; }
.queue-item.error  { background: var(--danger-bg); color: var(--danger); }
.queue-item.uploading { color: var(--text-muted); }

/* ── File table card ── */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

table {
  width: 100%;
  border-collapse: collapse;
}

thead th {
  text-align: left;
  padding: 10px 16px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-dim);
  background: var(--surface-raised);
  border-bottom: 1px solid var(--border);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

tbody tr {
  border-bottom: 1px solid rgba(51,65,85,0.6);
  transition: background 0.1s;
}
tbody tr:last-child { border-bottom: none; }
tbody tr:hover { background: var(--surface-raised); }

tbody td {
  padding: 10px 16px;
  vertical-align: middle;
}
tbody td:nth-child(2),
tbody td:nth-child(3) {
  color: var(--text-dim);
  font-size: 12px;
  white-space: nowrap;
}
tbody td:last-child { min-width: 160px; text-align: right; }

.dir-link {
  cursor: pointer;
  color: var(--text);
  font-weight: 500;
  transition: color 0.15s;
}
.dir-link:hover { color: var(--accent); }

.file-link {
  text-decoration: none;
  color: #cbd5e1;
  transition: color 0.15s;
}
.file-link:hover { color: var(--accent); }

/* ── Row action buttons ── */

.btn-delete, .btn-rename, .btn-download {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: transparent;
  font-size: 12px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s, background 0.15s, border-color 0.15s;
  text-decoration: none;
  font-family: inherit;
}
tr:hover .btn-delete,
tr:hover .btn-rename,
tr:hover .btn-download { opacity: 1; }

.btn-download { color: var(--accent); }
.btn-download:hover { background: rgba(59,130,246,0.12); border-color: rgba(59,130,246,0.4); }

.btn-rename { color: var(--text-muted); }
.btn-rename:hover { background: var(--surface-raised); }

.btn-delete { color: var(--danger); }
.btn-delete:hover { background: var(--danger-bg); border-color: var(--danger-border); }

/* ── Auth modal ── */

.auth-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  backdrop-filter: blur(4px);
}
.auth-modal.hidden { display: none; }

.auth-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px 28px;
  width: 300px;
  box-shadow: 0 24px 64px rgba(0,0,0,0.55);
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
}

.auth-close {
  position: absolute;
  top: 10px;
  right: 12px;
  background: none;
  border: none;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  color: var(--text-dim);
  padding: 4px;
}
.auth-close:hover { color: var(--text); }

.auth-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  text-align: center;
}

.auth-input {
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  outline: none;
  width: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: inherit;
}
.auth-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(59,130,246,0.2); }
.auth-input::placeholder { color: var(--text-dim); }

.auth-btn {
  padding: 10px;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
  font-family: inherit;
}
.auth-btn:hover { background: var(--accent-hover); }

.auth-error {
  color: var(--danger);
  font-size: 13px;
  text-align: center;
  margin: 0;
}

/* ── Empty / Error ── */

#empty-hint {
  text-align: center;
  color: var(--text-dim);
  padding: 56px 16px;
  font-size: 13px;
}

#error-msg {
  position: fixed;
  top: 16px;
  right: 16px;
  background: var(--surface);
  border: 1px solid var(--danger-border);
  color: var(--danger);
  padding: 10px 16px;
  border-radius: 8px;
  font-size: 13px;
  max-width: 320px;
  z-index: 1000;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.hidden { display: none !important; }

/* ── 手机端响应式 ── */

@media (max-width: 640px) {

  header {
    height: 44px;
    padding: 0 12px;
  }
  header h1 { font-size: 14px; }

  .container {
    margin: 10px auto;
    padding: 0 10px;
  }

  .toolbar {
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 10px;
  }
  #breadcrumb {
    width: 100%;
    flex: none;
    order: -1;
    overflow-x: auto;
    white-space: nowrap;
    padding-bottom: 2px;
  }

  table, tbody { display: block; }
  thead { display: none; }

  tbody tr {
    display: flex;
    flex-wrap: wrap;
    padding: 10px 12px;
    border-bottom: 1px solid rgba(51,65,85,0.6);
    align-items: center;
  }
  tbody tr:last-child { border-bottom: none; }
  tbody tr:hover { background: transparent; }

  tbody td:nth-child(1) {
    width: 100%;
    padding: 0 0 6px 0;
    font-size: 14px;
  }

  tbody td:nth-child(2),
  tbody td:nth-child(3) {
    flex: 1;
    padding: 0;
    font-size: 12px;
  }

  tbody td:last-child {
    padding: 0 0 0 8px;
    min-width: unset;
    text-align: right;
    flex-shrink: 0;
  }

  .btn-delete, .btn-rename, .btn-download {
    opacity: 1;
    padding: 5px 10px;
    min-height: 32px;
  }
}