*{margin:0;padding:0;box-sizing:border-box}
body{background:linear-gradient(135deg,#f5f7fa 0%,#e4e8ec 100%);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:#2c3e50;min-height:100vh}
header{background:rgba(255,255,255,0.95);backdrop-filter:blur(10px);border-bottom:1px solid rgba(0,0,0,0.05);position:sticky;top:0;z-index:100;box-shadow:0 2px 20px rgba(0,0,0,0.03)}
.header-inner{max-width:1300px;margin:0 auto;padding:16px 20px;display:flex;align-items:center;justify-content:space-between}
.logo{font-size:22px;font-weight:700;background:linear-gradient(135deg,#ef4444,#f97316);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;display:flex;align-items:center;gap:10px}
.logo-icon{width:32px;height:32px;background:linear-gradient(135deg,#ef4444,#f97316);border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:18px;font-weight:bold}
.header-desc{font-size:14px;color:#94a3b8;display:none}
@media (min-width:640px){.header-desc{display:block}}
.desktop-layout{display:grid;grid-template-columns:240px 1fr;gap:28px;max-width:1400px;margin:0 auto;padding:24px 20px}
@media (max-width:920px){.desktop-layout{grid-template-columns:1fr;padding:16px}.sidebar{display:none}}
.sidebar{position:sticky;top:80px;height:calc(100vh - 100px);overflow-y:auto;background:rgba(255,255,255,0.95);backdrop-filter:blur(10px);border-radius:20px;box-shadow:0 4px 24px rgba(0,0,0,0.04);padding:24px 16px;border:1px solid rgba(255,255,255,0.6)}
.sidebar-title{font-size:16px;font-weight:600;margin-bottom:20px;text-align:center;color:#1e293b}
.cat-item{width:100%;padding:13px 12px;border-radius:12px;margin-bottom:8px;cursor:pointer;font-size:14px;text-align:center;background:#f8fafc;transition:all 0.3s ease;border:1px solid transparent;display:flex;align-items:center;justify-content:center;gap:8px}
.cat-item:hover{background:#f1f5f9;border-color:#e2e8f0;transform:translateX(4px)}
.cat-item.active{background:linear-gradient(135deg,#ef4444,#f97316);color:#fff;border-color:transparent;transform:translateX(0);box-shadow:0 4px 12px rgba(239,68,68,0.3)}
.cat-item-icon{font-size:16px}
.mobile-cats{display:none;padding:0 16px 16px}
.mobile-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.mobile-cat{padding:12px 8px;border-radius:12px;background:rgba(255,255,255,0.9);text-align:center;font-size:13px;cursor:pointer;transition:all 0.3s ease;border:1px solid rgba(0,0,0,0.05);display:flex;align-items:center;justify-content:center;gap:6px}
.mobile-cat:hover{background:#f8fafc}
.mobile-cat.active{background:linear-gradient(135deg,#ef4444,#f97316);color:#fff;border-color:transparent;box-shadow:0 4px 12px rgba(239,68,68,0.3)}
.mobile-cat-icon{font-size:14px}
@media (max-width:920px){.mobile-cats{display:block}}
.wall-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px}
.wall-grid.single{grid-template-columns:1fr !important;max-width:900px;margin:0 auto}
.wall-card{border-radius:20px;overflow:hidden;background:#fff;transition:all 0.35s ease;box-shadow:0 4px 16px rgba(0,0,0,0.06);position:relative;cursor:pointer}
.wall-card:hover{transform:translateY(-6px);box-shadow:0 12px 32px rgba(0,0,0,0.12)}
.wall-card img{width:100%;height:auto;display:block;opacity:0;transition:opacity 0.4s ease-out;min-height:200px}
.wall-card img.loaded{opacity:1}
.card-bottom{padding:14px 16px;display:flex;justify-content:space-between;align-items:center;background:#fff}
.tag{font-size:13px;color:#64748b;font-weight:500;background:#f1f5f9;padding:4px 10px;border-radius:6px}
.down-btn{font-size:13px;color:#ef4444;font-weight:600;cursor:pointer;background:#fef2f2;padding:6px 14px;border-radius:8px;transition:all 0.2s}
.down-btn:hover{background:#fee2e2;transform:scale(1.05)}
.wall-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#ef4444,#f97316);opacity:0;transition:opacity 0.3s}
.wall-card:hover::before{opacity:1}
.loading{text-align:center;padding:24px;color:#94a3b8;font-size:14px;display:none}
.loading::before{content:'';display:inline-block;width:20px;height:20px;border:2px solid #f1f5f9;border-top-color:#ef4444;border-radius:50%;animation:spin 0.8s linear infinite;margin-right:8px}
@keyframes spin{to{transform:rotate(360deg)}}
.preview{position:fixed;inset:0;background:rgba(0,0,0,0.98);display:none;place-items:center;z-index:9999;backdrop-filter:blur(20px)}
.preview img{max-width:94%;max-height:92vh;border-radius:20px;box-shadow:0 20px 60px rgba(0,0,0,0.5);transition:transform 0.3s}
.close{position:absolute;top:24px;right:24px;color:#fff;font-size:36px;cursor:pointer;width:48px;height:48px;border-radius:50%;background:rgba(255,255,255,0.1);display:flex;align-items:center;justify-content:center;transition:all 0.3s}
.close:hover{background:rgba(255,255,255,0.2);transform:rotate(90deg)}
.site-footer{background:linear-gradient(180deg,#1e293b,#0f172a);color:#94a3b8;padding:40px 0;text-align:center;font-size:14px;margin-top:60px}
.site-footer .container{max-width:1300px;margin:0 auto;padding:0 20px}
.site-footer p{margin:10px 0}
.site-footer a{color:#94a3b8;text-decoration:none;transition:color 0.3s}
.site-footer a:hover{color:#fff}
.cr-text{color:#ef4444;font-weight:600;font-size:15px;user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none}
.scroll-top{position:fixed;bottom:30px;right:30px;width:50px;height:50px;background:linear-gradient(135deg,#ef4444,#f97316);border-radius:50%;color:#fff;font-size:24px;display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;visibility:hidden;transition:all 0.3s;box-shadow:0 4px 16px rgba(239,68,68,0.4);z-index:100}
.scroll-top.show{opacity:1;visibility:visible}
.scroll-top:hover{transform:scale(1.1)}
@media (max-width:640px){.wall-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}.card-bottom{padding:10px 12px}.tag{font-size:11px;padding:3px 8px}.down-btn{font-size:11px;padding:4px 10px}.close{top:16px;right:16px;width:40px;height:40px;font-size:28px}.logo{font-size:18px}.logo-icon{width:28px;height:28px}}