/* DHCP Web Manager - 简洁管理面板风格 */

:root {
  --bg: #f5f7fa;
  --card-bg: #ffffff;
  --border: #e1e4e8;
  --text: #24292e;
  --text-muted: #6a737d;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --ok: #16a34a;
  --warn: #d97706;
  --danger: #dc2626;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --radius: 6px;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: "SF Mono", Consolas, "Liberation Mono", monospace;
       font-size: 0.92em; background: #f1f3f5; padding: 1px 5px;
       border-radius: 3px; }

/* ---- topbar ---- */
.topbar {
  background: #1f2937;
  color: #f3f4f6;
  box-shadow: var(--shadow);
  position: sticky; top: 0; z-index: 100;
}
.topbar-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex; align-items: center;
  padding: 0 20px;
  height: 52px;
  gap: 24px;
}
.brand {
  color: #f3f4f6;
  font-weight: 600;
  font-size: 16px;
  text-decoration: none;
}
.nav {
  display: flex; gap: 4px;
  flex: 1;
}
.nav a {
  color: #d1d5db;
  padding: 8px 14px;
  border-radius: var(--radius);
  text-decoration: none;
  font-size: 14px;
  transition: background 0.15s, color 0.15s;
}
.nav a:hover { background: #374151; color: #fff; text-decoration: none; }
.nav a.active { background: var(--primary); color: #fff; }
.userbox {
  display: flex; align-items: center; gap: 14px;
  font-size: 13px;
}
.username { color: #f3f4f6; }
.link-muted {
  color: #9ca3af;
  font-size: 13px;
}
.link-muted:hover { color: #fff; text-decoration: none; }

/* ---- layout ---- */
.container {
  max-width: 1280px;
  margin: 24px auto;
  padding: 0 20px;
}
.footer {
  text-align: center;
  padding: 24px;
  color: var(--text-muted);
  font-size: 12px;
}

/* ---- 卡片 ---- */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
}
.card h1, .card h2 {
  margin-top: 0;
  font-size: 17px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 10px;
  margin-bottom: 16px;
}
.card.empty {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
}

/* ---- 统计卡片 ---- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 18px;
}
.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: var(--shadow);
}
.stat-card.stat-ok { border-left-color: var(--ok); }
.stat-card.stat-warn { border-left-color: var(--warn); }
.stat-num {
  font-size: 26px;
  font-weight: 600;
  color: var(--text);
}
.stat-label {
  color: var(--text-muted);
  font-size: 13px;
  margin-top: 4px;
}

/* ---- 表格 ---- */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.data-table th, .data-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}
.data-table th {
  background: #f6f8fa;
  font-weight: 600;
  color: var(--text-muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.data-table tr:last-child td { border-bottom: 0; }
.data-table tr:hover { background: #f9fafb; }
.data-table .actions { white-space: nowrap; }

/* ---- 按钮 ---- */
.btn {
  display: inline-block;
  padding: 6px 14px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  text-decoration: none;
  font-size: 13px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.btn:hover {
  background: #f3f4f6;
  text-decoration: none;
}
.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); color: #fff; }
.btn-danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}
.btn-danger:hover { background: #b91c1c; border-color: #b91c1c; color: #fff; }
.btn-warn { background: var(--warn); border-color: var(--warn); color: #fff; }
.btn-warn:hover { background: #b45309; border-color: #b45309; color: #fff; }
.btn-muted { background: #f3f4f6; color: var(--text-muted); }
.btn-sm { padding: 3px 10px; font-size: 12px; }
.btn-block { display: block; width: 100%; }

/* ---- 徽章 ---- */
.badge {
  display: inline-block;
  padding: 1px 8px;
  background: #e5e7eb;
  color: #374151;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 500;
}
.badge-ok { background: #dcfce7; color: var(--ok); }
.badge-warn { background: #fef3c7; color: var(--warn); }

/* ---- 表单 ---- */
.form .grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 14px;
}
.form label {
  display: flex;
  flex-direction: column;
  font-weight: 500;
  font-size: 13px;
  color: var(--text-muted);
  gap: 4px;
}
.form label.checkbox-row {
  flex-direction: row;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text);
}
.form input[type="text"],
.form input[type="password"],
.form input[type="number"] {
  padding: 7px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--text);
}
.form input[type="text"]:focus,
.form input[type="password"]:focus,
.form input[type="number"]:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}
.form-actions {
  margin-top: 18px;
  display: flex; gap: 8px;
}

/* ---- flash ---- */
.flashes { margin-bottom: 16px; }
.flash {
  padding: 10px 14px;
  border-radius: var(--radius);
  margin-bottom: 8px;
  border: 1px solid;
  font-size: 14px;
}
.flash-ok { background: #dcfce7; border-color: #bbf7d0; color: #166534; }
.flash-error { background: #fee2e2; border-color: #fecaca; color: #991b1b; }
.warn-text { color: var(--warn); }
.error-text { color: var(--danger); }
.ok-text { color: var(--ok); }

/* ---- 通用 ---- */
.muted { color: var(--text-muted); }
.small { font-size: 12px; }
.muted.small { color: var(--text-muted); font-size: 12px; }
.page-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 16px;
}
.page-head h1 { font-size: 22px; margin: 0; }
.search-box { display: flex; gap: 8px; }
.search-box input {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 13px;
  min-width: 240px;
}

/* ---- 进度条 ---- */
.bar {
  background: #e5e7eb;
  border-radius: 4px;
  height: 6px;
  width: 100px;
  overflow: hidden;
  display: inline-block;
  vertical-align: middle;
  margin-right: 6px;
}
.bar-fill {
  background: var(--primary);
  height: 100%;
  transition: width 0.3s;
}

/* ---- 代码块 ---- */
.code-block {
  background: #1f2937;
  color: #e5e7eb;
  padding: 14px 16px;
  border-radius: var(--radius);
  font-family: "SF Mono", Consolas, monospace;
  font-size: 12px;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre;
  max-height: 480px;
}

/* ---- 登录页 ---- */
.login-card {
  max-width: 360px;
  margin: 80px auto;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  text-align: center;
}
.login-card h1 { margin-top: 0; }
.login-form {
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
}
.login-form label {
  display: flex; flex-direction: column; gap: 4px;
  font-size: 13px; color: var(--text-muted); font-weight: 500;
}
.login-form input {
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
}

/* ---- 分页 ---- */
.pager {
  display: flex; gap: 12px; align-items: center; justify-content: center;
  margin-top: 20px;
}

/* ---- 错误页 ---- */
.error-page { text-align: center; padding: 60px 24px; }
.error-page h1 {
  font-size: 64px;
  margin: 0;
  border: 0;
}