:root{--primary:#4f46e5;--primary-light:#eef0ff;--bg:#f8f9fc;--surface:#fff;--surface-alt:#f3f4f6;--border:#e5e7eb;--text:#1a1d27;--text-muted:#6b7280;--radius:12px;--shadow:0 2px 12px rgba(0,0,0,.07);--success:#16a34a;}
[data-theme=dark]{--bg:#0f1117;--surface:#1a1d27;--surface-alt:#232634;--border:#2d3148;--text:#e8eaf6;--text-muted:#8b90b8;--primary-light:#1e1f35;--shadow:0 2px 12px rgba(0,0,0,.4);}
*{box-sizing:border-box;margin:0;padding:0;}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;background:var(--bg);color:var(--text);line-height:1.6;font-size:15px;}
a{color:var(--primary);text-decoration:none;}a:hover{text-decoration:underline;}
.container{max-width:1200px;margin:0 auto;padding:0 20px;}
/* Header */
.announcement-bar{background:var(--primary);color:#fff;text-align:center;padding:8px;font-size:13px;}
.site-header{background:var(--surface);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;}
.header-inner{display:flex;align-items:center;gap:20px;padding:14px 0;flex-wrap:wrap;}
.brand{font-size:22px;font-weight:800;color:var(--text);display:flex;align-items:center;gap:6px;text-decoration:none;}
.brand-logo{height:36px;object-fit:contain;}
.main-nav{display:flex;gap:20px;flex:1;}
.main-nav a{color:var(--text-muted);font-size:14px;font-weight:500;}
.main-nav a:hover{color:var(--primary);text-decoration:none;}
.header-actions{display:flex;gap:8px;align-items:center;margin-left:auto;}
.header-actions button{background:none;border:1px solid var(--border);border-radius:8px;padding:7px 10px;cursor:pointer;color:var(--text);font-size:15px;}
.hamburger{display:none;}
@media(max-width:768px){.main-nav{display:none;width:100%;flex-direction:column;gap:10px;padding:10px 0;order:10;}.main-nav.open{display:flex;}.hamburger{display:block;}}
/* Hero */
.hero{text-align:center;padding:60px 20px;background:var(--surface);}
.hero h1{font-size:clamp(24px,5vw,42px);font-weight:900;line-height:1.2;margin-bottom:14px;}
.hero p{font-size:17px;color:var(--text-muted);max-width:560px;margin:0 auto 24px;}
/* Cards */
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);transition:box-shadow .2s,transform .2s;}
.card:hover{box-shadow:var(--shadow);transform:translateY(-2px);}
a.card{display:block;color:var(--text);}a.card:hover{text-decoration:none;}
/* Grid */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:18px;}
/* Tool card */
.tool-card{padding:22px 18px;}.tool-icon{font-size:34px;margin-bottom:10px;}
.tool-card h3{font-size:16px;margin-bottom:6px;}.tool-card p{font-size:13px;color:var(--text-muted);}
/* Section */
.section{margin-bottom:40px;padding-top:10px;}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;}.section-header h2{font-size:20px;}
/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 20px;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;border:none;transition:opacity .15s;text-decoration:none;}
.btn:hover{opacity:.88;text-decoration:none;}
.btn-primary{background:var(--primary);color:#fff;}
.btn-outline{background:none;border:1.5px solid var(--border);color:var(--text);}
.btn-sm{padding:6px 14px;font-size:13px;}
/* Forms */
.form-group{margin-bottom:16px;}label{display:block;font-weight:600;font-size:13px;margin-bottom:5px;}
input,select,textarea{width:100%;padding:10px 12px;border:1.5px solid var(--border);border-radius:8px;font-size:14px;background:var(--surface);color:var(--text);font-family:inherit;transition:border .15s;}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--primary);}
/* Tool app */
.tool-detail{padding:24px 0;}.tool-intro{color:var(--text-muted);margin-bottom:20px;}
.tool-app{background:var(--surface);border:1.5px solid var(--border);border-radius:var(--radius);padding:28px;margin-bottom:20px;}
.tool-result{display:none;padding:18px;background:var(--primary-light);border-radius:10px;margin-top:18px;}
.tool-result.show{display:block;animation:fadeIn .3s;}
.tool-howto{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;margin-top:24px;line-height:1.8;}
.tool-howto h2{font-size:20px;margin:20px 0 10px;}.tool-howto h3{font-size:16px;margin:16px 0 8px;}
.tool-howto ol,.tool-howto ul{padding-left:22px;margin:10px 0;}
kbd{background:var(--surface-alt);border:1px solid var(--border);border-radius:4px;padding:2px 7px;font-size:12px;font-family:monospace;}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);}
@keyframes fadeIn{from{opacity:0;transform:translateY(8px);}to{opacity:1;transform:none;}}
/* Post card */
.post-card{display:block;color:var(--text);overflow:hidden;}
.post-card img{width:100%;height:180px;object-fit:cover;}.post-body{padding:14px;}
.post-card h3{font-size:16px;margin-bottom:6px;}.post-meta{font-size:12px;color:var(--text-muted);}
/* Breadcrumbs */
.breadcrumbs{margin:16px 0;font-size:13px;color:var(--text-muted);}
.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:4px;list-style:none;}
.breadcrumbs li.sep{color:var(--border);}
/* Alert */
.alert{padding:12px 16px;border-radius:8px;margin-bottom:14px;}
.alert-error{background:#fde2e2;color:#b91c1c;}
.alert-success{background:#dcfce7;color:#15803d;}
/* Status pills */
.status-pill{display:inline-block;padding:2px 10px;border-radius:20px;font-size:11px;font-weight:600;}
.status-pill.active,.status-pill.enabled,.status-pill.published{background:#dcfce7;color:#15803d;}
.status-pill.pending,.status-pill.draft,.status-pill.scheduled{background:#fef3c7;color:#92400e;}
.status-pill.rejected,.status-pill.disabled,.status-pill.inactive{background:#fde2e2;color:#b91c1c;}
.status-pill.sold,.status-pill.suspended{background:#e0f2fe;color:#0369a1;}
/* Badge */
.badge{display:inline-block;background:var(--primary);color:#fff;padding:2px 8px;border-radius:20px;font-size:11px;font-weight:600;}
/* Pagination */
.pagination{display:flex;gap:6px;justify-content:center;margin:24px 0;flex-wrap:wrap;}
.pagination a{padding:7px 12px;border:1px solid var(--border);border-radius:8px;font-size:13px;color:var(--text);}
.pagination a.active{background:var(--primary);color:#fff;border-color:var(--primary);}
/* Error page */
.error-page{text-align:center;padding:80px 20px;}.error-page h1{font-size:80px;font-weight:900;color:var(--primary);}.error-page h2{font-size:24px;margin-bottom:10px;}
/* Ad slot */
.ad-slot{text-align:center;margin:20px 0;}
.ad-desktop-only{display:block;}@media(max-width:768px){.ad-desktop-only{display:none;}.ad-mobile-only{display:block;}}
/* Footer */
.site-footer{background:var(--surface);border-top:1px solid var(--border);padding:48px 0 24px;margin-top:60px;}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:30px;margin-bottom:32px;}
.footer-grid h4{font-size:13px;font-weight:700;margin-bottom:12px;text-transform:uppercase;letter-spacing:.05em;}
.footer-grid a{display:block;font-size:13px;color:var(--text-muted);margin-bottom:7px;}
.footer-bottom{border-top:1px solid var(--border);padding-top:20px;font-size:13px;color:var(--text-muted);}