/* ======================================================
   Serial Vault 全局样式（原生 CSS，无构建工具）
   ====================================================== */
:root {
    --sidebar-width: 220px;
    --topbar-height: 56px;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --danger: #dc2626;
    --danger-hover: #b91c1c;
    --warn: #d97706;
    --success: #16a34a;
    --bg: #f1f5f9;
    --card-bg: #ffffff;
    --border: #e2e8f0;
    --text: #0f172a;
    --text-muted: #64748b;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
    font-size: 14px;
    color: var(--text);
    background: var(--bg);
}

a { color: var(--primary); text-decoration: none; }

/* ---------------- 登录页 ---------------- */
.login-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
}
.login-card {
    width: 360px;
    background: #fff;
    border-radius: 10px;
    padding: 32px;
    box-shadow: 0 10px 30px rgba(15, 23, 42, .25);
}
.login-card h1 {
    margin: 0 0 4px;
    font-size: 22px;
    text-align: center;
}
.login-sub {
    margin: 0 0 24px;
    text-align: center;
    color: var(--text-muted);
}
.login-error {
    color: var(--danger);
    min-height: 20px;
    margin: 0 0 8px;
    font-size: 13px;
}

/* 验证码行：输入框 + 可点击刷新的图片 */
.captcha-row {
    display: flex;
    gap: 10px;
    align-items: center;
}
.captcha-row input {
    flex: 1;
    min-width: 0;
    letter-spacing: 4px;
}
#captcha-img {
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    flex: none;
    background: #f1f5f9;
}

/* ---------------- 主框架布局 ---------------- */
.layout { display: flex; min-height: 100vh; }
.sidebar {
    width: var(--sidebar-width);
    background: #0f172a;
    color: #cbd5e1;
    position: fixed;
    top: 0; bottom: 0; left: 0;
    display: flex;
    flex-direction: column;
}
.sidebar .brand {
    height: var(--topbar-height);
    display: flex;
    align-items: center;
    padding: 0 20px;
    font-size: 17px;
    font-weight: 600;
    color: #fff;
    border-bottom: 1px solid #1e293b;
}
.sidebar nav { padding: 12px 0; flex: 1; }
.sidebar nav a {
    display: block;
    padding: 12px 20px;
    color: #cbd5e1;
    border-left: 3px solid transparent;
}
.sidebar nav a:hover { background: #1e293b; color: #fff; }
.sidebar nav a.active {
    background: #1e293b;
    color: #fff;
    border-left-color: var(--primary);
}
.main {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-width: 0;
}
.topbar {
    height: var(--topbar-height);
    background: #fff;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 10;
}
.topbar-title { font-size: 15px; font-weight: 600; }
.topbar-right { display: flex; align-items: center; gap: 12px; }
.current-user { color: var(--text-muted); }
#page-frame {
    width: 100%;
    height: calc(100vh - var(--topbar-height));
    border: 0;
    display: block;
    background: var(--bg);
}

/* ---------------- 内容区（iframe 内页面） ---------------- */
.content { padding: 24px; }
.page-title { margin: 0 0 16px; font-size: 18px; }

/* 统计卡片（仪表盘） */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}
.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
}
.stat-value { font-size: 28px; font-weight: 700; margin-bottom: 4px; }
.stat-label { color: var(--text-muted); }
.quick-links { margin-top: 24px; }
.quick-links a {
    display: inline-block;
    margin: 0 12px 8px 0;
    padding: 8px 14px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 6px;
}

/* 卡片与筛选栏 */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 16px;
}
.card-title { margin: 0 0 12px; font-size: 15px; font-weight: 600; }
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: flex-end;
}
.filter-item { display: flex; flex-direction: column; gap: 4px; }
.filter-item label { font-size: 12px; color: var(--text-muted); }

/* 表单 */
input, select, textarea {
    font-family: inherit;
    font-size: 14px;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: #fff;
    color: var(--text);
    min-width: 160px;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, .15);
}
textarea { min-width: 100%; resize: vertical; }

.form-item { margin-bottom: 14px; }
.form-item label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
}
.form-item input, .form-item select, .form-item textarea { width: 100%; }
.form-item .required::after { content: " *"; color: var(--danger); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form-error { color: var(--danger); min-height: 18px; margin: 4px 0; font-size: 13px; }

/* 按钮 */
.btn {
    display: inline-block;
    padding: 8px 16px;
    font-size: 14px;
    border: 1px solid transparent;
    border-radius: 6px;
    background: #fff;
    color: var(--text);
    cursor: pointer;
    transition: background .15s;
}
.btn:hover { background: #f8fafc; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: var(--danger-hover); }
.btn-warn { background: var(--warn); color: #fff; }
.btn-warn:hover { filter: brightness(.95); }
.btn-ghost { border-color: var(--border); }
.btn-sm { padding: 4px 10px; font-size: 13px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

/* 表格 */
.table-card { overflow-x: auto; }
table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
}
th, td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
th {
    font-weight: 600;
    color: var(--text-muted);
    background: #f8fafc;
}
td.wrap { white-space: normal; word-break: break-all; }
.cell-num { text-align: center; color: var(--text-muted); width: 56px; }
.tbody-empty td { text-align: center; color: var(--text-muted); padding: 32px 0; }
.muted { color: var(--text-muted); }

/* 状态徽标 */
.badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 12px;
}
.badge-success { background: #dcfce7; color: #15803d; }
.badge-danger { background: #fee2e2; color: #b91c1c; }
.badge-info { background: #dbeafe; color: #1d4ed8; }
.badge-muted { background: #e2e8f0; color: #475569; }

/* 分页 */
.pager {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 12px;
}
.pager-info { color: var(--text-muted); }
.pager-btns { display: flex; gap: 8px; }

/* 弹窗 */
.modal-mask {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, .45);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
}
.modal-mask.show { display: flex; }
.modal {
    width: 520px;
    max-width: calc(100vw - 32px);
    max-height: calc(100vh - 64px);
    overflow-y: auto;
    background: #fff;
    border-radius: 8px;
    padding: 20px;
}
.modal-title { margin: 0 0 16px; font-size: 16px; }
.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 16px;
}

/* 轻量提示条 */
.toast {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 10px 20px;
    border-radius: 6px;
    color: #fff;
    z-index: 9999;
    box-shadow: 0 6px 18px rgba(15, 23, 42, .25);
}
.toast-success { background: var(--success); }
.toast-error { background: var(--danger); }