/* ==========================================
   Notecraft — 仿 mintimate.cn 风格
   Banner 大图 + Board 浮动卡片 + 暗色模式
   ========================================== */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

/* === Variables === */
:root{
    --bg:#fff;
    --board-bg:#fff;
    --text:#2f4154;
    --text-secondary:#5a6a7e;
    --text-muted:#8e9aab;
    --accent:#29d;
    --accent-hover:#1a8ad9;
    --accent-light:#e3f2fd;
    --orange:#f97316;
    --orange-hover:#ea580c;
    --border:#e8eaee;
    --border-light:#f0f2f5;
    --shadow:0 12px 15px 0 rgba(0,0,0,.24),0 17px 50px 0 rgba(0,0,0,.19);
    --shadow-card:0 2px 8px rgba(0,0,0,.06);
    --shadow-card-hover:0 8px 24px rgba(0,0,0,.12);
    --radius:0.5rem;
    --radius-lg:0.5rem;
    --nav-height:64px;
    --transition:.2s ease-in-out;
}
[data-theme="dark"]{
    --bg:#181a20;
    --board-bg:#1e2028;
    --text:#c9d1d9;
    --text-secondary:#8b949e;
    --text-muted:#6e7681;
    --accent:#58a6ff;
    --accent-light:#1a2a40;
    --orange:#fb923c;
    --border:#30363d;
    --border-light:#21262d;
    --shadow:0 12px 15px 0 rgba(0,0,0,.5),0 17px 50px 0 rgba(0,0,0,.4);
}

html{font-size:16px;scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{
    font-family:'Inter','Noto Sans SC',-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif;
    color:var(--text);background:var(--bg);line-height:1.7;
    transition:background var(--transition),color var(--transition);
}
a{color:var(--accent);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--accent-hover)}
img{max-width:100%;height:auto}
.container{max-width:780px;margin:0 auto;padding:0 20px}

/* === Reading Progress Bar === */
#progress-bar{
    position:fixed;top:0;left:0;height:3px;background:var(--accent);
    z-index:9999;transition:width .1s linear;
}

/* === Navbar === */
.navbar{
    position:fixed;top:0;left:0;right:0;z-index:100;height:var(--nav-height);
    background:transparent;transition:all var(--transition);
}
.navbar.nav-scrolled{
    background:var(--board-bg);box-shadow:0 2px 12px rgba(0,0,0,.1);
}
[data-theme="dark"] .navbar.nav-scrolled{box-shadow:0 2px 12px rgba(0,0,0,.4)}
.nav-inner{
    max-width:960px;margin:0 auto;padding:0 24px;
    display:flex;align-items:center;justify-content:space-between;height:100%;
}
.nav-brand{
    font-size:1.1rem;font-weight:700;color:#fff!important;
    letter-spacing:-.3px;display:flex;align-items:center;gap:8px;
}
.nav-scrolled .nav-brand{color:var(--text)!important}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-links a{
    font-size:.88rem;font-weight:500;color:rgba(255,255,255,.8);
    padding:6px 14px;border-radius:20px;transition:all var(--transition);
    display:flex;align-items:center;gap:5px;
}
.nav-scrolled .nav-links a{color:var(--text-secondary)}
.nav-links a:hover,.nav-links a.active{
    background:rgba(255,255,255,.15);color:#fff;
}
.nav-scrolled .nav-links a:hover,.nav-scrolled .nav-links a.active{
    background:var(--accent-light);color:var(--accent);
}
.theme-toggle{
    background:none;border:none;cursor:pointer;color:rgba(255,255,255,.8);
    font-size:1rem;padding:6px 10px;border-radius:20px;transition:all var(--transition);
}
.nav-scrolled .theme-toggle{color:var(--text-secondary)}
.theme-toggle:hover{background:rgba(255,255,255,.15);color:#fff}
.nav-scrolled .theme-toggle:hover{background:var(--accent-light);color:var(--accent)}

/* === Banner (Full Viewport) === */
.banner{
    position:relative;height:100vh;min-height:420px;max-height:720px;
    background-size:cover;background-position:center;background-repeat:no-repeat;
    display:flex;align-items:center;justify-content:center;overflow:hidden;
}
.banner-mask{
    position:absolute;inset:0;background:rgba(0,0,0,.3);
}
.banner-text{
    position:relative;text-align:center;color:#fff;z-index:1;padding:0 24px;
    animation:fadeInUp .8s ease-out;
}
@keyframes fadeInUp{
    from{opacity:0;transform:translateY(30px)}
    to{opacity:1;transform:translateY(0)}
}
.banner-text h1{
    font-size:2.8rem;font-weight:700;letter-spacing:-1px;
    margin-bottom:12px;text-shadow:0 2px 8px rgba(0,0,0,.3);
}
.banner-text p{
    font-size:1.15rem;opacity:.85;margin-bottom:28px;font-weight:400;
}
.banner-search form{
    display:flex;max-width:420px;margin:0 auto;
    background:rgba(255,255,255,.15);backdrop-filter:blur(12px);
    border-radius:30px;overflow:hidden;border:1px solid rgba(255,255,255,.2);
}
.banner-search input{
    flex:1;background:transparent;border:none;color:#fff;
    padding:12px 20px;font-size:.95rem;outline:none;
}
.banner-search input::placeholder{color:rgba(255,255,255,.55)}
.banner-search button{
    background:var(--accent);border:none;color:#fff;
    padding:12px 20px;cursor:pointer;transition:background var(--transition);
}
.banner-search button:hover{background:var(--accent-hover)}
.scroll-down{
    position:absolute;bottom:30px;left:50%;transform:translateX(-50%);
    color:rgba(255,255,255,.6);font-size:1.5rem;animation:bounce 2s infinite;
    cursor:pointer;
}
@keyframes bounce{
    0%,100%{transform:translateX(-50%) translateY(0)}
    50%{transform:translateX(-50%) translateY(8px)}
}

/* === Main Board (浮动卡片) === */
.board{
    position:relative;margin-top:-3rem;z-index:10;
    padding:3rem 0;background:var(--board-bg);
    border-radius:var(--radius) var(--radius) 0 0;
    box-shadow:var(--shadow);min-height:400px;
    transition:background var(--transition);
}
.board-post{
    margin-top:var(--nav-height);border-radius:0;box-shadow:none;
    padding:2rem 0 3rem;
}

/* === Post Card === */
.post-list{display:flex;flex-direction:column;gap:24px}
.post-card{
    background:var(--board-bg);border-radius:var(--radius);
    overflow:hidden;border:1px solid var(--border);
    box-shadow:var(--shadow-card);transition:all var(--transition);
}
.post-card:hover{
    border-color:var(--accent);
    box-shadow:var(--shadow-card-hover);transform:translateY(-2px);
}
.post-card-img img{
    width:100%;height:200px;object-fit:cover;
}
.post-card-body{padding:24px 28px}
.post-card-title{
    font-size:1.35rem;font-weight:700;margin-bottom:10px;line-height:1.4;
}
.post-card-title a{color:var(--text);transition:color var(--transition)}
.post-card-title a:hover{color:var(--accent)}
.post-card-meta{
    display:flex;flex-wrap:wrap;gap:16px;margin-bottom:12px;
    font-size:.85rem;color:var(--text-muted);
}
.post-card-meta i{margin-right:4px}
.post-card-excerpt{
    font-size:.95rem;color:var(--text-secondary);
    line-height:1.7;margin-bottom:14px;
}
.post-card-tags{display:flex;flex-wrap:wrap;gap:6px}
.post-card-tags span{
    background:var(--accent-light);color:var(--accent);
    padding:2px 10px;border-radius:12px;font-size:.8rem;font-weight:500;
}

/* === Empty State === */
.empty-state{
    text-align:center;padding:80px 20px;color:var(--text-muted);
}
.empty-state i{font-size:4rem;margin-bottom:16px;display:block;opacity:.4}
.empty-state p{font-size:1.1rem}

/* === Pagination === */
.pagination{
    display:flex;justify-content:center;align-items:center;gap:12px;
    margin-top:40px;
}
.pagination a{
    padding:8px 20px;border-radius:20px;border:1px solid var(--border);
    color:var(--text-secondary);font-size:.9rem;font-weight:500;
    transition:all var(--transition);
}
.pagination a:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.page-info{font-size:.9rem;color:var(--text-muted)}

/* ============ 文章页 ============ */

/* === Article Header === */
.post-single-header{margin-bottom:32px;padding-bottom:24px;border-bottom:1px solid var(--border)}
.post-single-header h1{
    font-size:2rem;font-weight:700;line-height:1.35;margin-bottom:16px;
    color:var(--text);letter-spacing:-.5px;
}
.post-single-meta{
    display:flex;flex-wrap:wrap;gap:20px;font-size:.88rem;
    color:var(--text-muted);margin-bottom:14px;
}
.post-single-meta i{margin-right:4px}
.post-single-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.post-single-tags span{
    background:var(--accent-light);color:var(--accent);
    padding:4px 14px;border-radius:16px;font-size:.85rem;font-weight:500;
}

/* === Markdown Content === */
.post-content{
    font-size:1.02rem;line-height:1.85;color:var(--text);
    overflow-wrap:break-word;word-wrap:break-word;
}
.post-content h1,.post-content h2,.post-content h3,.post-content h4{
    margin:36px 0 18px;font-weight:700;line-height:1.35;
}
.post-content h2{
    font-size:1.5rem;padding-bottom:8px;
    border-bottom:2px solid var(--accent-light);
}
.post-content h3{font-size:1.2rem}
.post-content h4{font-size:1.05rem}
.post-content p{margin-bottom:18px}
.post-content ul,.post-content ol{margin-bottom:18px;padding-left:28px}
.post-content li{margin-bottom:8px}
.post-content ul li::marker{color:var(--accent)}
.post-content strong{color:var(--orange);font-weight:600}
.post-content a{
    color:var(--orange);text-decoration:underline;
    text-decoration-style:dotted;text-underline-offset:5px;
}
.post-content a:hover{color:var(--orange-hover)}
.post-content blockquote{
    margin:24px 0;padding:16px 24px;border-left:4px solid var(--accent);
    background:var(--bg);border-radius:0 var(--radius) var(--radius) 0;
    color:var(--text-secondary);font-size:.95rem;
}
.post-content blockquote p:last-child{margin-bottom:0}

/* === 行内代码 === */
.post-content code{
    background:rgba(27,31,35,.05);padding:2px 7px;border-radius:4px;
    font-family:'SF Mono','Fira Code','Cascadia Code','Consolas',monospace;
    font-size:.88em;color:var(--orange);
}
[data-theme="dark"] .post-content code{
    background:rgba(240,246,252,.1);color:#fb923c;
}

/* === 代码块 === */
.post-content pre{
    background:#f6f8fa;padding:20px 24px;border-radius:var(--radius);
    overflow-x:auto;margin:20px 0;border:1px solid var(--border);
    line-height:1.6;font-size:.88rem;position:relative;
}
[data-theme="dark"] .post-content pre{
    background:#161b22;border-color:#30363d;
}
.post-content pre code{
    background:none!important;padding:0;color:var(--text);
    font-size:inherit;border-radius:0;
}

/* === 表格 === */
.post-content table{
    width:100%;border-collapse:collapse;margin:20px 0;
    border-radius:var(--radius);overflow:hidden;
    border:1px solid var(--border);
}
.post-content th,.post-content td{
    padding:12px 16px;border:1px solid var(--border);text-align:left;
}
.post-content th{background:var(--bg);font-weight:600;font-size:.9rem}
.post-content td{font-size:.93rem}
.post-content tr:nth-child(even){background:rgba(0,0,0,.02)}

/* === 图片 === */
.post-content img{
    border-radius:var(--radius);margin:20px auto;display:block;
    box-shadow:0 2px 8px rgba(0,0,0,.08);max-width:100%;
}

/* === 分割线 === */
.post-content hr{
    border:none;height:1px;background:var(--border);margin:32px 0;
}

/* === Comments === */
#comments{margin-top:56px}
#comments h3{font-size:1.15rem;font-weight:600;margin-bottom:20px}
#comments .comment-list{list-style:none;padding:0}
#comments .comment-list li{
    margin-bottom:16px;padding:20px;
    background:var(--bg);border:1px solid var(--border);
    border-radius:var(--radius);transition:all var(--transition);
}
#comments .comment-author{font-weight:600;margin-bottom:6px;font-size:.95rem}
#comments .comment-author .avatar{
    width:36px;height:36px;border-radius:50%;margin-right:10px;
    vertical-align:middle;border:2px solid var(--border);
}
#comments .comment-meta{font-size:.8rem;color:var(--text-muted);margin-bottom:10px}
#comments .comment-content{font-size:.95rem;line-height:1.75}
.respond{margin-top:32px}
.respond textarea{
    width:100%;padding:14px 18px;border:1px solid var(--border);
    border-radius:var(--radius);font-size:.95rem;background:var(--bg);
    color:var(--text);outline:none;resize:vertical;min-height:120px;
    transition:border var(--transition);
}
.respond textarea:focus,.respond input:focus{border-color:var(--accent)}
.respond input[type="text"],.respond input[type="email"]{
    padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);
    font-size:.9rem;background:var(--bg);color:var(--text);outline:none;
    margin-right:10px;margin-bottom:8px;transition:border var(--transition);
}
.respond input[type="submit"]{
    background:var(--accent);color:#fff;border:none;padding:10px 28px;
    border-radius:20px;font-size:.92rem;font-weight:600;
    cursor:pointer;transition:all var(--transition);
}
.respond input[type="submit"]:hover{
    background:var(--accent-hover);transform:translateY(-1px);
}

/* === 404 === */
.error-404{text-align:center;padding:100px 20px}
.error-404 h1{
    font-size:5rem;font-weight:700;color:var(--accent);
    margin-bottom:8px;line-height:1;
}
.error-404 p{font-size:1.1rem;color:var(--text-secondary);margin-bottom:24px}
.error-404 a{
    display:inline-block;padding:8px 24px;background:var(--accent);
    color:#fff;border-radius:20px;font-weight:500;
}

/* === Footer === */
.site-footer{
    margin-top:0;padding:32px 0;
    border-top:1px solid var(--border);
    background:var(--board-bg);
}
.footer-content{
    display:flex;justify-content:space-between;align-items:center;
    flex-wrap:wrap;gap:16px;
}
.footer-info p,.footer-powered p{font-size:.85rem;color:var(--text-muted)}
.footer-beian a{color:var(--text-muted);font-size:.8rem}
.footer-beian a:hover{color:var(--accent)}
.footer-powered a{color:var(--accent);font-weight:500}

/* === Responsive === */
@media(max-width:768px){
    .banner{height:60vh;min-height:320px}
    .banner-text h1{font-size:1.8rem}
    .banner-text p{font-size:1rem}
    .board{margin-top:-2rem;padding:2rem 0}
    .board-post{margin-top:56px}
    .post-card-body{padding:18px 20px}
    .post-card-title{font-size:1.15rem}
    .post-single-header h1{font-size:1.5rem}
    .post-content{font-size:.98rem}
    .footer-content{flex-direction:column;text-align:center}
}
@media(max-width:480px){
    .banner{height:50vh;min-height:260px}
    .banner-text h1{font-size:1.5rem}
    .board{margin-top:-1.5rem}
    .post-card-meta{font-size:.8rem;gap:10px}
    .post-single-meta{font-size:.8rem;gap:12px}
    .post-content pre{padding:16px;font-size:.82rem}
}