/* ================================================
   外链侠 UI 设计系统 - Design Tokens
   基于新UI规范 v5
   ================================================ */

/* 2.1 颜色系统 */
:root {
    /* 主色 */
    --color-primary: #1677ff;
    --color-primary-hover: #4096ff;
    --color-primary-pressed: #0958d9;
    --color-primary-soft: #e6f0ff;
    
    /* 辅助色 */
    --color-secondary: #7b5bff;
    
    /* 状态色 */
    --color-success: #00b96b;
    --color-warning: #f58220;
    --color-error: #f53f3f;
    
    /* 文字色 */
    --color-text-base: #1d2129;
    --color-text-sub: #4e5969;
    --color-text-tip: #86909c;
    --color-text-disable: #c9cdd4;
    
    /* 边框色 */
    --color-border: #e5e6eb;
    --color-border-soft: #f2f3f5;
    
    /* 背景色 */
    --color-bg-page: #f5f7fa;
    --color-bg-surface: #ffffff;
    --color-bg-mute: #f7f8fa;
    
    /* 2.2 间距刻度 */
    --layout-pad-x: 16px;
    --layout-pad-y: 20px;
    --card-gap: 16px;
    --inner-gap: 12px;
    
    /* 2.3 圆角规范 */
    --card-radius: 10px;
    --radius-item: 8px;
    --radius-sm: 6px;
    --radius-xs: 4px;
    
    /* 2.5 阴影 */
    --shadow-card: 0 8px 24px rgba(31, 45, 80, 0.08);
    --shadow-card-hover: 0 12px 32px rgba(31, 45, 80, 0.12);
    --shadow-hero: 0 20px 60px rgba(31, 45, 80, 0.08);
    
    /* 毛玻璃导航 */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-blur: blur(14px);
    
    /* 动效参数 */
    --transition-fast: 0.2s cubic-bezier(.4, 0, .2, 1);
    --transition-normal: 0.3s cubic-bezier(.4, 0, .2, 1);
    
    /* 头部高度 */
    --header-height: 56px;
}

/* ================================================
   全局基础样式
   ================================================ */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: v-sans, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-text-base);
    background-color: var(--color-bg-page);
    margin: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 页面底层容器 */
.page-wrapper {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.main-content {
    flex: 1;
    padding: var(--layout-pad-y) var(--layout-pad-x);
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

/* ================================================
   4.1 按钮 Button
   ================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 34px;
    padding: 0 18px;
    font-size: 14px;
    font-weight: 500;
    border-radius: 34px;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.btn:focus {
    outline: none;
    box-shadow: 0 0 0 3px var(--color-primary-soft);
}

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

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

.btn-primary:active {
    background: var(--color-primary-pressed);
    border-color: var(--color-primary-pressed);
}

.btn-default {
    background: var(--color-bg-surface);
    color: var(--color-text-base);
    border-color: var(--color-border);
}

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

.btn-default.active,
.btn-default:active {
    background: var(--color-primary-soft);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-large {
    height: 40px;
    padding: 0 22px;
    font-size: 15px;
    border-radius: 40px;
}

.btn-sm {
    height: 28px;
    padding: 0 12px;
    font-size: 13px;
    border-radius: 28px;
}

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

.btn-success:hover {
    background: #00a85f;
    border-color: #00a85f;
    color: #fff;
}

.btn-outline-light {
    background: transparent;
    color: #fff;
    border-color: rgba(255,255,255,0.5);
}

.btn-outline-light:hover {
    background: rgba(255,255,255,0.1);
    border-color: #fff;
    color: #fff;
}

.btn-outline-primary {
    background: var(--color-primary-soft);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

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

.btn-outline-warning {
    background: #fff7e6;
    border-color: var(--color-warning);
    color: var(--color-warning);
}

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

.btn-outline-secondary {
    background: #f5f5f5;
    border-color: #adb5bd;
    color: #6c757d;
}

.btn-outline-secondary:hover {
    background: #6c757d;
    border-color: #6c757d;
    color: #fff;
}

/* ================================================
   4.3 导航栏 Nav
   ================================================ */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-height);
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--color-border-soft);
}

.header-inner {
    max-width: 1200px;
    height: 100%;
    margin: 0 auto;
    padding: 0 var(--layout-pad-x);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--color-text-base);
}

.header-brand svg {
    width: 28px;
    height: 28px;
    color: var(--color-primary);
}

.header-brand-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text-base);
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-user {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-username {
    color: var(--color-text-sub);
    font-size: 14px;
}

.header-menu-btn {
    display: none;
    width: 36px;
    height: 36px;
    padding: 6px;
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--color-text-base);
    border-radius: var(--radius-sm);
}

.header-menu-btn:hover {
    background: var(--color-bg-mute);
}

.header-menu-btn svg {
    width: 100%;
    height: 100%;
}

.header-mobile-nav {
    display: none;
    flex-direction: column;
    gap: 8px;
    padding: 12px var(--layout-pad-x);
    background: var(--color-bg-surface);
    border-bottom: 1px solid var(--color-border-soft);
}

.header-mobile-nav.show {
    display: flex;
}

/* ================================================
   4.2 卡片 Card
   ================================================ */
.card {
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border-soft);
    border-radius: var(--card-radius);
    padding: 24px;
    transition: all var(--transition-normal);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--color-primary);
}

.card-header {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text-base);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border-soft);
}

.card-body {
    color: var(--color-text-sub);
}

/* 统计卡片 */
.stat-card {
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border-soft);
    border-radius: var(--card-radius);
    padding: 20px;
    text-align: center;
    transition: all var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card);
}

.stat-card .stat-label {
    font-size: 13px;
    color: var(--color-text-tip);
    margin-bottom: 8px;
}

.stat-card .stat-value {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.2;
}

.stat-card .stat-value.text-primary { color: var(--color-primary); }
.stat-card .stat-value.text-success { color: var(--color-success); }
.stat-card .stat-value.text-warning { color: var(--color-warning); }
.stat-card .stat-value.text-info { color: var(--color-secondary); }

/* ================================================
   表单元素
   ================================================ */
.form-control {
    width: 100%;
    height: 40px;
    padding: 0 14px;
    font-size: 14px;
    color: var(--color-text-base);
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-soft);
}

.form-control::placeholder {
    color: var(--color-text-tip);
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-base);
    margin-bottom: 8px;
}

.input-group {
    display: flex;
    gap: 8px;
}

.input-group .form-control {
    flex: 1;
}

/* ================================================
   提示信息
   ================================================ */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius-item);
    font-size: 14px;
    margin-bottom: 16px;
}

.alert-danger {
    background: #fff2f0;
    color: var(--color-error);
    border: 1px solid #ffc7c5;
}

.alert-success {
    background: #f0fdf4;
    color: var(--color-success);
    border: 1px solid #d1f5d8;
}

/* ================================================
   登录页面
   ================================================ */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    padding: var(--layout-pad-x);
}

.login-card {
    width: 100%;
    max-width: 400px;
    background: var(--color-bg-surface);
    border-radius: var(--card-radius);
    padding: 40px;
    box-shadow: var(--shadow-hero);
    animation: slideIn 0.5s ease-out;
}

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

.login-card .login-title {
    text-align: center;
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text-base);
    margin-bottom: 32px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.login-footer {
    text-align: center;
    margin-top: 24px;
    font-size: 14px;
    color: var(--color-text-tip);
}

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

.login-footer a:hover {
    text-decoration: underline;
}

/* 验证码 */
.captcha-img {
    height: 40px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 1px solid var(--color-border);
}

/* ================================================
   页面区块
   ================================================ */
.section {
    padding: 60px 0;
}

.section--mute {
    background: var(--color-bg-mute);
}

.section-title {
    text-align: center;
    font-size: 30px;
    font-weight: 700;
    color: var(--color-text-base);
    margin-bottom: 48px;
    line-height: 1.3;
}

/* ================================================
   网格布局
   ================================================ */
.row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--card-gap);
}

.col-12 { width: 100%; }
.col-6 { width: calc(50% - var(--card-gap) / 2); }
.col-4 { width: calc(33.333% - var(--card-gap) * 2 / 3); }
.col-3 { width: calc(25% - var(--card-gap) * 3 / 4); }

/* ================================================
   响应式
   ================================================ */
@media (max-width: 960px) {
    .col-md-3 { width: calc(50% - var(--card-gap) / 2); }
    .header-nav { display: none; }
    .header-user .header-username,
    .header-user .btn:not(.header-menu-btn) {
        display: none;
    }
    .header-menu-btn {
        display: flex;
    }
}

@media (max-width: 560px) {
    :root {
        --layout-pad-x: 12px;
        --layout-pad-y: 16px;
    }
    
    .col-6, .col-4, .col-3 {
        width: 100%;
    }
    
    .login-card {
        padding: 24px;
    }
    
    .stat-card .stat-value {
        font-size: 24px;
    }
}

/* ================================================
   表格
   ================================================ */
.table-wrapper {
    overflow-x: auto;
}

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

.table th,
.table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--color-border-soft);
}

.table th {
    font-weight: 600;
    color: var(--color-text-base);
    background: var(--color-bg-mute);
}

.table td {
    color: var(--color-text-sub);
}

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

/* ================================================
   模态框
   ================================================ */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--color-bg-surface);
    border-radius: var(--card-radius);
    padding: 24px;
    width: 100%;
    max-width: 480px;
    transform: translateY(-20px);
    transition: transform var(--transition-normal);
}

.modal-overlay.show .modal-content {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.modal-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-base);
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--color-text-tip);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--color-bg-mute);
    color: var(--color-text-base);
}

.modal-footer {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
}

/* ================================================
   滚动入场动画
   ================================================ */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.reveal.in {
    opacity: 1;
    transform: translateY(0);
}

/* ================================================
   辅助类
   ================================================ */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-tip); }
.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-info { color: var(--color-secondary); }

.mt-3 { margin-top: 16px; }
.mb-3 { margin-bottom: 16px; }
.mb-4 { margin-bottom: 24px; }

.d-flex { display: flex; }
.align-items-center { align-items: center; }
.justify-content-center { justify-content: center; }
.justify-content-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 16px; }

.w-100 { width: 100%; }