/**
 * base.css - 全局样式
 * CSS 变量、Reset、排版、布局、表单、工具类
 */

/* ==============================
   CSS Variables / 设计令牌
   ============================== */
:root {
    /* 浅色模式 */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.7);
    --bg-code: #1e1e2e;

    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --text-link: #0ea5e9;
    --text-danger: #ef4444;

    --bg-hover: rgba(0, 0, 0, 0.04);

    --accent-primary: #0ea5e9;
    --accent-secondary: #6366f1;
    --accent-gradient: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
    --accent-glow: rgba(14, 165, 233, 0.3);

    --border-color: rgba(0, 0, 0, 0.08);
    --border-glow: rgba(14, 165, 233, 0.2);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
    --shadow-glow: 0 0 20px var(--accent-glow);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 10px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro SC", "SF Pro Display", "PingFang SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", "Cascadia Code", "SF Mono", "Source Code Pro", Consolas, monospace;

    --header-height: 64px;
    --sidebar-width: 300px;
    --content-max: 800px;
    --gap: 24px;
}

/* 深色模式 */
.dark {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-glass: rgba(30, 41, 59, 0.8);

    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-link: #38bdf8;

    --accent-primary: #38bdf8;
    --accent-secondary: #818cf8;
    --accent-gradient: linear-gradient(135deg, #38bdf8 0%, #818cf8 100%);
    --accent-glow: rgba(56, 189, 248, 0.25);

    --border-color: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(56, 189, 248, 0.2);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.2);

    --text-danger: #f87171;
    --bg-hover: rgba(255, 255, 255, 0.06);
}

/* ==============================
   Reset / 基础
   ============================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    transition: background 0.3s ease, color 0.3s ease;
    min-height: 100vh;
}

a {
    color: var(--text-link);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

/* ==============================
   容器 & 布局
   ============================== */
/* Joe 容器 */
.joe_container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--gap, 15px);
}

.joe_main {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-width: 0;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--gap);
}

.main-wrapper {
    display: flex !important;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    gap: var(--gap);
    padding-top: calc(var(--header-height) + 32px);
    padding-bottom: 48px;
    min-height: calc(100vh - var(--header-height));
    align-items: flex-start;
}

.content {
    flex: 1 !important;
    min-width: 0;
}

.sidebar {
    flex: 0 0 300px !important;
    width: 300px !important;
}

/* ==============================
   表单元素
   ============================== */
.form-input,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-input:focus,
.form-textarea:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-textarea {
    resize: vertical;
}

/* ==============================
   按钮
   ============================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
}

.btn-primary:hover {
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
    color: white;
}

/* ==============================
   标签链接
   ============================== */
.tag-link {
    padding: 4px 10px;
    background: var(--bg-primary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    transition: all 0.2s ease;
}

.tag-link:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

/* ==============================
   分页
   ============================== */
.pagination {
    margin-top: 40px;
}

.page-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.page-nav li {
    display: inline-flex;
}

.page-nav a,
.page-nav span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 500;
    transition: all 0.2s ease;
}

.page-nav a:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.page-nav .active {
    background: var(--accent-gradient);
    color: white;
    border-color: transparent;
}

.page-nav .prev,
.page-nav .next {
    font-weight: 600;
}

/* ==============================
   徽章
   ============================== */
.badge {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.badge-source {
    background: var(--accent-gradient);
    color: white;
}

/* ==============================
   深色模式切换 - 图标切换
   ============================== */
.dark .icon-sun { display: block; }
.dark .icon-moon { display: none; }
.icon-sun { display: none; }
.icon-moon { display: block; }

/* ==============================
   通用暗色覆盖
   ============================== */
.dark .hero-banner {
    background: linear-gradient(135deg, #0a0a1a 0%, #0f172a 50%, #0a0a1a 100%);
}

.dark .hero-overlay {
    background: linear-gradient(180deg, rgba(0,0,0,0.5) 0%, rgba(0,0,0,0.8) 100%);
}