:root {
  --bg: #f4f5fb;
  --card: #ffffff;
  --text: #1d2333;
  --muted: #7a8199;
  --line: #e6e8f2;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --danger: #dc2626;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(20, 24, 48, 0.05), 0 8px 24px rgba(20, 24, 48, 0.07);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  height: 100%;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }

/* ---------- 登录 ---------- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(1200px 600px at 20% -10%, #e0e7ff 0%, transparent 60%),
    radial-gradient(1000px 500px at 90% 110%, #ede9fe 0%, transparent 55%),
    var(--bg);
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 40px 34px 34px;
}

.login-logo {
  font-size: 26px;
  font-weight: 700;
  text-align: center;
  letter-spacing: 1px;
}

.login-sub {
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  margin: 6px 0 28px;
  letter-spacing: 0.5px;
}

.field { display: block; margin-bottom: 16px; }
.field span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; }

input[type="text"], input[type="password"], .text-input {
  width: 100%;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 15px;
  background: #fbfbfe;
  color: var(--text);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12); }

.error-text {
  color: var(--danger);
  font-size: 13px;
  margin: 4px 0 10px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 18px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--card);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.05s;
  white-space: nowrap;
}
.btn:hover { background: #f3f4fa; }
.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-hover); }

.btn-danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}
.btn-danger:hover { background: #b91c1c; }

.btn-ghost { border-color: transparent; background: transparent; color: var(--muted); }
.btn-ghost:hover { color: var(--text); background: rgba(0, 0, 0, 0.04); }

.btn-block { width: 100%; padding: 12px; font-size: 15px; }

.btn-sm { padding: 5px 12px; font-size: 13px; border-radius: 8px; }

/* ---------- 顶栏 ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.logo-badge {
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.5px;
  background: linear-gradient(120deg, #4f46e5, #7c3aed);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.topbar-right { display: flex; align-items: center; gap: 6px; }

.user-chip {
  font-size: 13px;
  color: var(--muted);
  margin-right: 4px;
}
.user-chip b { color: var(--text); }
.role-tag {
  display: inline-block;
  font-size: 11px;
  padding: 1px 7px;
  border-radius: 999px;
  margin-left: 6px;
  vertical-align: 1px;
}
.role-admin { background: #eef2ff; color: #4f46e5; }
.role-user { background: #f1f5f9; color: #64748b; }

/* ---------- 工具条 ---------- */
.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 24px 14px;
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
}

.toolbar-title { font-size: 18px; font-weight: 600; }
.toolbar-actions { display: flex; gap: 10px; }

/* ---------- 文件卡片 ---------- */
.file-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 16px;
  padding: 6px 24px 40px;
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
}

.file-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: transform 0.15s, box-shadow 0.15s;
}
.file-card:hover { transform: translateY(-2px); box-shadow: 0 4px 8px rgba(20,24,48,0.06), 0 14px 34px rgba(20,24,48,0.10); }

.file-head { display: flex; align-items: flex-start; gap: 12px; }

.file-icon {
  flex: none;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  overflow: hidden;
}
.file-icon span { max-width: 40px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.file-name {
  font-size: 15px;
  font-weight: 600;
  word-break: break-all;
  line-height: 1.35;
}

.file-meta {
  font-size: 12.5px;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.file-actions { display: flex; gap: 8px; margin-top: auto; }
.file-actions .btn { flex: 1; }

.empty-tip {
  text-align: center;
  color: var(--muted);
  padding: 70px 20px;
  font-size: 15px;
}

/* ---------- 弹窗 ---------- */
.modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(15, 18, 35, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  padding: 20px;
  backdrop-filter: blur(2px);
}

.modal {
  background: var(--card);
  border-radius: 18px;
  box-shadow: 0 24px 60px rgba(10, 12, 30, 0.25);
  width: 100%;
  max-width: 560px;
  max-height: 86vh;
  overflow-y: auto;
  padding: 26px 26px 20px;
}

.modal-sm { max-width: 400px; }

.modal-title { font-size: 17px; font-weight: 700; margin-bottom: 18px; }

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
}

.confirm-text { font-size: 14.5px; color: #444b63; line-height: 1.6; word-break: break-all; }

/* ---------- 上传 ---------- */
.drop-zone {
  border: 2px dashed #c9cdea;
  border-radius: 14px;
  padding: 34px 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.drop-zone:hover, .drop-zone.dragover { border-color: var(--primary); background: #f5f6ff; }
.drop-hint { font-size: 15px; font-weight: 500; }
.drop-sub { font-size: 12.5px; color: var(--muted); margin-top: 6px; }

.pending-list { margin-top: 16px; display: flex; flex-direction: column; gap: 10px; }

.pending-item {
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 12px;
}
.pending-item .pending-name { flex: 1; }
.pending-item .pending-size { flex: none; font-size: 12px; color: var(--muted); width: 74px; text-align: right; }
.pending-remove { flex: none; border: none; background: none; color: var(--muted); font-size: 18px; cursor: pointer; line-height: 1; padding: 2px 6px; }
.pending-remove:hover { color: var(--danger); }

.progress-wrap {
  height: 8px;
  background: #eceef7;
  border-radius: 999px;
  margin-top: 16px;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #4f46e5, #7c3aed);
  border-radius: 999px;
  transition: width 0.2s;
}

/* ---------- 用户管理 ---------- */
.create-user-row {
  display: flex;
  gap: 10px;
  margin-bottom: 18px;
}
.create-user-row input { flex: 1; }

.user-list { display: flex; flex-direction: column; gap: 8px; }

.user-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 14px;
}
.user-row .uname { flex: 1; font-weight: 500; }
.user-row .uactions { display: flex; gap: 6px; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  background: #1e2438;
  color: #fff;
  padding: 11px 22px;
  border-radius: 12px;
  font-size: 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25);
  z-index: 200;
  max-width: 88vw;
  text-align: center;
}
.toast.error { background: #b91c1c; }
.toast.success { background: #15803d; }

/* ---------- 响应式 ---------- */
@media (max-width: 640px) {
  .topbar { padding: 12px 14px; }
  .toolbar { padding: 16px 14px 10px; }
  .file-grid { grid-template-columns: 1fr; padding: 4px 14px 32px; }
  .create-user-row { flex-direction: column; }
  .user-chip { display: none; }
  .modal { padding: 20px 16px 16px; }
}