/* ===== ⛰️ 灵山 — 三机文件共享管理系统 ===== */
:root {
  --bg-dark: #0d1117;
  --bg-card: #161b22;
  --bg-hover: #1c2333;
  --border: #30363d;
  --text: #e6edf3;
  --text-dim: #8b949e;
  --accent: #58a6ff;
  --accent-hover: #79c0ff;
  --danger: #f85149;
  --danger-hover: #ff6b63;
  --success: #3fb950;
  --radius: 8px;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-dark);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

/* ===== 登录页 ===== */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(135deg, #0d1117 0%, #161b22 50%, #0d1117 100%);
}

.login-container { width: 100%; max-width: 400px; padding: 20px; }

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px 32px;
  text-align: center;
  box-shadow: var(--shadow);
}

.login-icon { font-size: 48px; margin-bottom: 8px; }

.login-card h1 {
  font-size: 28px;
  margin-bottom: 4px;
  background: linear-gradient(135deg, #58a6ff, #79c0ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.login-subtitle {
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 24px;
}

.login-form { text-align: left; }

.login-form .form-group { margin-bottom: 20px; }

.login-form label {
  display: block;
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 6px;
}

.login-form input {
  width: 100%;
  padding: 10px 14px;
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}

.login-form input:focus { border-color: var(--accent); }

/* ===== 顶部栏 ===== */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar-left { display: flex; align-items: center; gap: 12px; }

.logo {
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(135deg, #58a6ff, #79c0ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-sub {
  font-size: 13px;
  color: var(--text-dim);
  padding: 2px 8px;
  background: rgba(88,166,255,0.1);
  border-radius: 4px;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.share-dir {
  font-size: 12px;
  color: var(--text-dim);
  font-family: monospace;
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===== 主容器 ===== */
.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 24px;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  padding: 10px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 14px;
}

.crumb { padding: 2px 6px; border-radius: 4px; }

.crumb-link {
  color: var(--accent);
  cursor: pointer;
  transition: background 0.15s;
}

.crumb-link:hover { background: rgba(88,166,255,0.1); }

.crumb-current { color: var(--text); font-weight: 600; }

.crumb-sep { color: var(--text-dim); }

/* ===== 工具栏 ===== */
.toolbar {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-card);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
}

.btn:hover { background: var(--bg-hover); border-color: #484f58; }

.btn-primary {
  background: #1f6feb;
  border-color: #1f6feb;
  color: #fff;
}

.btn-primary:hover { background: #388bfd; border-color: #388bfd; }

.btn-secondary {
  background: #21262d;
  border-color: #30363d;
}

.btn-secondary:hover { background: #30363d; }

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

.btn-danger:hover { background: var(--danger-hover); }

.btn-sm { padding: 4px 12px; font-size: 13px; }

.btn-block { width: 100%; justify-content: center; }

.btn-logout {
  color: var(--text-dim);
  border-color: var(--border);
}

.btn-logout:hover { color: var(--danger); border-color: var(--danger); }

.btn-refresh {
  background: transparent;
  border-color: var(--border);
  color: var(--text-dim);
}

.btn-refresh:hover { color: var(--text); background: var(--bg-hover); }

/* ===== 文件列表 ===== */
.file-table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.file-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.file-table th {
  text-align: left;
  padding: 10px 16px;
  background: #161b22;
  border-bottom: 1px solid var(--border);
  color: var(--text-dim);
  font-weight: 600;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.file-table td {
  padding: 10px 16px;
  border-bottom: 1px solid #21262d;
  vertical-align: middle;
}

.file-table tr:last-child td { border-bottom: none; }

.file-table tr:hover td { background: var(--bg-hover); }

.col-name { min-width: 200px; }
.col-size { width: 100px; text-align: right; }
.col-time { width: 160px; }
.col-actions { width: 120px; text-align: center; }

.file-link {
  color: var(--accent);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.file-link:hover { color: var(--accent-hover); }

.file-name {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.loading-cell, .empty-cell, .error-cell {
  text-align: center;
  padding: 40px !important;
  color: var(--text-dim);
}

.error-cell { color: var(--danger); }

/* ===== 操作按钮 ===== */
.act-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  padding: 4px 6px;
  border-radius: 4px;
  transition: background 0.15s;
  opacity: 0.6;
}

.act-btn:hover { opacity: 1; background: rgba(255,255,255,0.05); }

.act-del:hover { background: rgba(248,81,73,0.15); }

/* ===== 弹窗 ===== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.15s;
}

.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: 480px;
  max-width: 90vw;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: var(--shadow);
  animation: slideUp 0.2s;
}

.modal-sm { width: 400px; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}

.modal-header h3 { font-size: 16px; }

.modal-close {
  font-size: 24px;
  cursor: pointer;
  color: var(--text-dim);
  line-height: 1;
}

.modal-close:hover { color: var(--text); }

.modal-body { padding: 20px; }

.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  padding: 12px 20px;
  border-top: 1px solid var(--border);
}

/* ===== 表单 ===== */
.form-group { margin-bottom: 16px; }

.form-group:last-child { margin-bottom: 0; }

.form-group label {
  display: block;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 6px;
  font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="password"] {
  width: 100%;
  padding: 10px 14px;
  background: #0d1117;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus { border-color: var(--accent); }

/* ===== 上传区域 ===== */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: rgba(88,166,255,0.03);
}

.drop-zone:hover,
.drop-zone.drag-over {
  border-color: var(--accent);
  background: rgba(88,166,255,0.08);
}

.drop-icon { font-size: 40px; margin-bottom: 8px; }

.drop-zone p { color: var(--text-dim); font-size: 14px; }

.upload-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.file-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background: rgba(88,166,255,0.1);
  border: 1px solid rgba(88,166,255,0.2);
  border-radius: 6px;
  font-size: 13px;
  color: var(--accent);
}

.upload-progress {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
}

.progress-bar {
  flex: 1;
  height: 6px;
  background: #21262d;
  border-radius: 3px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #1f6feb, #58a6ff);
  border-radius: 3px;
  transition: width 0.3s;
  width: 0%;
}

#progressText {
  font-size: 13px;
  color: var(--text-dim);
  min-width: 40px;
  text-align: right;
}

/* ===== 删除确认 ===== */
.delete-msg {
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.6;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 24px;
  font-size: 14px;
  color: var(--text);
  box-shadow: var(--shadow);
  opacity: 0;
  transition: all 0.3s;
  z-index: 9999;
  pointer-events: none;
  white-space: nowrap;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ===== 动画 ===== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* ===== 提示 ===== */
.alert {
  padding: 10px 14px;
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 16px;
}

.alert-error {
  background: rgba(248,81,73,0.1);
  border: 1px solid rgba(248,81,73,0.3);
  color: var(--danger);
}