:root{--fb-blue:#1877f2;--fb-blue-dark:#165dc7;--fb-bg:#f0f2f5;--fb-card:#fff;--fb-text:#050505;--fb-secondary:#65676b;--fb-border:#e4e6eb;--fb-green:#31a24c;--fb-red:#f02849;--fb-hover:#d8dadf;--fb-input-bg:#f0f2f5;--fb-red-bg:#fde7eb;--fb-red-bg-hover:#fbd3dc;--fb-green-bg:#e7f8ec}[data-theme=dark]{--fb-bg:#18191a;--fb-card:#242526;--fb-text:#e4e6eb;--fb-secondary:#b0b3b8;--fb-border:#3e4042;--fb-green:#31a24c;--fb-red:#f02849;--fb-hover:#3a3b3c;--fb-input-bg:#3a3b3c;--fb-red-bg:#3a1b20;--fb-red-bg-hover:#4a222a;--fb-green-bg:#1b3a24}[data-theme=dark] body{background:var(--fb-bg)}*{box-sizing:border-box;margin:0;padding:0}html,body{max-width:100vw;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;overflow-x:hidden}body{background:var(--fb-bg);color:var(--fb-text);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}.topbar{background:var(--fb-card);border-bottom:1px solid var(--fb-border);z-index:100;justify-content:space-between;align-items:center;height:56px;padding:0 16px;display:flex;position:sticky;top:0}.topbar-logo{color:var(--fb-blue);align-items:center;gap:10px;font-size:24px;font-weight:700;display:flex}.logo-icon{justify-content:center;align-items:center;width:36px;height:36px;display:flex}.topbar-actions{align-items:center;gap:12px;display:flex}.btn{cursor:pointer;border:none;border-radius:6px;justify-content:center;align-items:center;gap:8px;padding:8px 16px;font-size:15px;font-weight:600;transition:background .15s;display:inline-flex}.btn-blue{background:var(--fb-blue);color:#fff}.btn-blue:hover{background:var(--fb-blue-dark)}.btn-green{background:var(--fb-green);color:#fff}.btn-ghost{background:var(--fb-input-bg);color:var(--fb-text)}.btn-ghost:hover{background:var(--fb-hover)}.btn-red{background:var(--fb-red-bg);color:var(--fb-red)}.btn-red:hover{background:var(--fb-red-bg-hover)}.btn-sm{padding:6px 12px;font-size:13px}.user-chip{align-items:center;gap:8px;font-size:14px;font-weight:600;display:flex}.avatar{background:var(--fb-blue);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:36px;height:36px;font-size:16px;font-weight:700;display:flex;overflow:hidden}.avatar-lg{width:48px;height:48px;font-size:20px}.main{width:100%;max-width:1000px;margin:0 auto;padding:20px 24px}.page-title{margin-bottom:20px;font-size:22px;font-weight:700}.composer{background:var(--fb-card);border-radius:8px;margin-bottom:20px;padding:12px;box-shadow:0 1px 2px #0000001a}.composer-top{border-bottom:1px solid var(--fb-border);align-items:center;gap:10px;padding-bottom:12px;display:flex}.composer-input{background:var(--fb-input-bg);cursor:text;color:var(--fb-secondary);border:none;border-radius:20px;flex:1;padding:10px 16px;font-size:15px}.composer-form{flex-direction:column;gap:10px;margin-top:12px;display:flex}.composer-form input[type=text],.composer-form textarea{border:1px solid var(--fb-border);resize:vertical;background:var(--fb-input-bg);width:100%;color:var(--fb-text);border-radius:8px;padding:10px 12px;font-family:inherit;font-size:15px}.composer-form input[type=text]::placeholder,.composer-form textarea::placeholder{color:var(--fb-secondary)}.composer-form input[type=text]:focus,.composer-form textarea:focus{border-color:var(--fb-blue);outline:none}.composer-form textarea{min-height:80px}.post-card{background:var(--fb-card);border:1px solid #0000;border-radius:8px;margin-bottom:16px;transition:box-shadow .25s,transform .25s,border-color .25s;overflow:hidden;box-shadow:0 8px 24px #0000002e,0 4px 8px #0000001a}.post-card:hover{border:1px solid #00000014;transform:translateY(-6px);box-shadow:0 30px 70px #0000008c,0 15px 30px #00000059}.post-header{align-items:center;gap:10px;padding:12px 16px;display:flex}.post-author{font-size:15px;font-weight:600}.post-time{color:var(--fb-secondary);font-size:13px}.post-body{padding:0 16px 12px}.post-title{margin-bottom:8px;font-size:18px;font-weight:700}.post-content{white-space:pre-wrap;font-size:15px;line-height:1.5}.post-stats{border-top:1px solid var(--fb-border);color:var(--fb-secondary);padding:8px 16px;font-size:13px}.post-actions{border-top:1px solid var(--fb-border);display:flex}.post-action{color:var(--fb-secondary);cursor:pointer;background:0 0;border:none;flex:1;justify-content:center;align-items:center;gap:6px;padding:8px;font-size:14px;font-weight:600;display:flex}.post-action:hover{background:var(--fb-hover)}.post-action.like-btn.liked{color:var(--fb-like,#1877f2)}.post-action.like-btn.liked span{filter:saturate(1.5)}.post-action.like-btn:disabled{opacity:.7;cursor:default}.download-btn{color:var(--fb-blue);background:var(--fb-input-bg);border:1px solid var(--fb-border);cursor:pointer;border-radius:6px;align-items:center;gap:6px;margin-top:8px;padding:6px 12px;font-size:13px;font-weight:600;text-decoration:none;transition:background .2s;display:inline-flex}.download-btn:hover{background:var(--fb-hover)}.comments-section{border-top:1px solid var(--fb-border);padding:12px 16px}.comment{gap:8px;margin-bottom:12px;display:flex}.comment-bubble{background:var(--fb-input-bg);border-radius:18px;flex:1;padding:8px 12px}.comment-author{font-size:13px;font-weight:600}.comment-content{margin-top:2px;font-size:14px}.comment-form{gap:8px;margin-top:8px;display:flex}.comment-form input{border:1px solid var(--fb-border);border-radius:20px;flex:1;padding:8px 14px;font-size:14px}.open-btn{text-align:left;width:100%;color:var(--fb-secondary);cursor:pointer;background:0 0;border:none;padding:4px 0;font-size:14px;font-weight:600}.open-btn:hover{text-decoration:underline}.auth-page{flex-direction:column;justify-content:center;align-items:center;min-height:100vh;padding:20px;display:flex}.auth-card{background:var(--fb-card);border-radius:8px;width:100%;max-width:420px;padding:32px;box-shadow:0 1px 2px #0000001a}.auth-brand{text-align:center;margin-bottom:24px}.auth-brand h1{color:var(--fb-blue);font-size:36px;font-weight:700}.auth-brand p{color:var(--fb-secondary);margin-top:4px;font-size:15px}.auth-form{flex-direction:column;gap:12px;display:flex}.auth-form input{border:1px solid var(--fb-border);border-radius:6px;padding:12px 14px;font-family:inherit;font-size:16px}.auth-form input:focus{border-color:var(--fb-blue);outline:none}.auth-btn{background:var(--fb-blue);color:#fff;cursor:pointer;border:none;border-radius:6px;padding:12px;font-size:17px;font-weight:700}.auth-btn:hover{background:var(--fb-blue-dark)}.auth-error{background:var(--fb-red-bg);color:var(--fb-red);border-radius:6px;padding:10px 12px;font-size:14px}.auth-links{text-align:center;color:var(--fb-secondary);margin-top:16px;font-size:14px}.auth-links a{color:var(--fb-blue);font-weight:600}.msg{border-radius:6px;margin-bottom:12px;padding:10px 12px;font-size:14px}.msg-success{background:var(--fb-green-bg);color:var(--fb-green)}.msg-error{background:var(--fb-red-bg);color:var(--fb-red)}.empty{text-align:center;color:var(--fb-secondary);padding:60px 20px}.empty-icon{margin-bottom:12px;font-size:48px}.admin-title{margin-bottom:4px;font-size:22px;font-weight:700}.admin-sub{color:var(--fb-secondary);margin-bottom:20px;font-size:14px}.card{background:var(--fb-card);border-radius:8px;margin-bottom:20px;padding:20px;box-shadow:0 1px 2px #0000001a}.card h2{margin-bottom:16px;font-size:17px}.form-group{margin-bottom:14px}.form-group label{color:var(--fb-secondary);margin-bottom:6px;font-size:14px;font-weight:600;display:block}.form-group input,.form-group textarea{border:1px solid var(--fb-border);resize:vertical;background:var(--fb-input-bg);width:100%;color:var(--fb-text);border-radius:6px;padding:10px 12px;font-family:inherit;font-size:15px}.form-group input::placeholder,.form-group textarea::placeholder{color:var(--fb-secondary)}.form-group input:focus,.form-group textarea:focus{border-color:var(--fb-blue);outline:none}.admin-post{border-bottom:1px solid var(--fb-border);justify-content:space-between;align-items:center;gap:12px;padding:12px 0;display:flex}.admin-post:last-child{border-bottom:none}.admin-post-title{font-size:15px;font-weight:600}.admin-post-meta{color:var(--fb-secondary);font-size:13px}.admin-post-actions{flex-shrink:0;gap:8px;display:flex}