/* ==========================================================================
   base.css —— 全站基础样式
   包含：CSS 变量、重置样式、通用组件（按钮 / 表单 / 卡片 / 提示）
   ========================================================================== */

:root {
    /* 主色：与 Telegram 蓝保持一致的视觉延续 */
    --color-primary: #2f7cf6;
    --color-primary-dark: #1f63d0;
    --color-primary-light: #eaf2ff;
    --color-success: #16a34a;
    --color-warning: #f59e0b;
    --color-danger: #dc2626;

    /* 中性色 */
    --color-text: #1f2d3d;
    --color-text-secondary: #5c6b7a;
    --color-text-muted: #93a1b0;
    --color-border: #e3e8ef;
    --color-bg: #f4f6fa;
    --color-bg-card: #ffffff;

    /* 侧边栏（深色） */
    --sidebar-bg: #1f2937;
    --sidebar-bg-hover: #273449;
    --sidebar-bg-active: #2f7cf6;
    --sidebar-text: #c2cbd8;

    /* 尺寸与圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --sidebar-width: 232px;
    --header-height: 60px;

    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
    --shadow-md: 0 4px 12px rgba(16, 24, 40, 0.08);
    --shadow-lg: 0 12px 32px rgba(16, 24, 40, 0.14);

    /* 过渡 */
    --transition: 0.2s ease;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    color: var(--color-primary-dark);
}

/* ---------- 按钮 ---------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 9px 18px;
    font-size: 14px;
    font-family: inherit;
    font-weight: 500;
    line-height: 1.2;
    color: var(--color-text);
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

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

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

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

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

.btn-block {
    width: 100%;
}

.btn-text {
    padding: 4px 8px;
    background: transparent;
    border-color: transparent;
    color: var(--color-text-secondary);
}

.btn-text:hover {
    color: var(--color-primary);
    background: var(--color-primary-light);
    border-color: transparent;
}

/* ---------- 表单 ---------- */

.form-item {
    margin-bottom: 18px;
}

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

.form-input {
    width: 100%;
    padding: 10px 12px;
    font-size: 14px;
    font-family: inherit;
    color: var(--color-text);
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(47, 124, 246, 0.14);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

/* ---------- 卡片 ---------- */

.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

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

.card-title {
    margin: 0;
    font-size: 15px;
    font-weight: 600;
}

.card-body {
    padding: 20px;
}

/* ---------- 提示条 ---------- */

.alert {
    padding: 12px 14px;
    margin-bottom: 16px;
    font-size: 13px;
    line-height: 1.5;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
}

.alert-info {
    color: #1e5bb8;
    background: #eef4ff;
    border-color: #cfe0ff;
}

.alert-warning {
    color: #92610a;
    background: #fff8e6;
    border-color: #ffe3a3;
}

.alert-danger {
    color: #a51f1f;
    background: #fdecec;
    border-color: #f8c9c9;
}

/* ---------- 数据表格 ---------- */

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.data-table thead th {
    padding: 10px 12px;
    font-weight: 600;
    text-align: left;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}

.data-table tbody td {
    padding: 11px 12px;
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
}

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

.data-table tbody tr:hover {
    background: #fafbfd;
}

/* 窄屏下表格允许横向滚动 */
.card-body {
    overflow-x: auto;
}

/* ---------- 通用工具类 ---------- */

.text-muted {
    color: var(--color-text-muted);
}

.text-center {
    text-align: center;
}

.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-16 { margin-bottom: 16px; }

.hidden {
    display: none !important;
}

/* ---------- 全局消息提示（Toast） ---------- */

.toast-container {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: center;
    pointer-events: none;
}

.toast {
    min-width: 220px;
    max-width: 420px;
    padding: 10px 16px;
    font-size: 14px;
    color: #fff;
    background: #2b3444;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 0.22s ease, transform 0.22s ease;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

.toast-success { background: var(--color-success); }
.toast-error { background: var(--color-danger); }
.toast-warning { background: var(--color-warning); }