:root{--bg:#0B0E11;--bg2:#141820;--bg3:#1C2230;--glass:rgba(20,24,32,0.7);--border:rgba(108,92,231,0.15);--border2:rgba(108,92,231,0.35);--t1:#F0ECF6;--t2:#A8A3C0;--t3:#6E698A;--primary:#6C5CE7;--secondary:#A29BFE;--accent:#00CEC9;--green:#4ADE80;--yellow:#FFD93D;--orange:#FB923C;--red:#EF4444;--r:12px;--tr:0.2s ease;--f:'Inter',-apple-system,sans-serif;--m:'SF Mono','Fira Code',monospace}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;overflow:hidden}
body{font-family:var(--f);background:var(--bg);color:var(--t1);-webkit-font-smoothing:antialiased}
.app-container{display:flex;flex-direction:column;height:100vh}
.app-header{background:var(--glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);padding:12px 20px;z-index:10;flex-shrink:0}
.header-content{display:flex;align-items:center;justify-content:space-between}
.logo-group{display:flex;align-items:center;gap:12px}
.logo-icon{display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:linear-gradient(135deg,rgba(108,92,231,0.15),rgba(0,206,201,0.1));border-radius:var(--r);border:1px solid var(--border)}
.app-header h1{font-size:1.1rem;font-weight:700;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.header-actions{display:flex;gap:8px}
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 14px;border:none;border-radius:8px;font-family:var(--f);font-size:0.8rem;font-weight:600;cursor:pointer;transition:all var(--tr);white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--primary),#7C6CF6);color:#fff;box-shadow:0 2px 12px rgba(108,92,231,0.3)}
.btn-primary:hover{box-shadow:0 4px 20px rgba(108,92,231,0.5);transform:translateY(-1px)}
.btn-secondary{background:var(--bg3);color:var(--t2);border:1px solid var(--border)}
.btn-secondary:hover{border-color:var(--border2);color:var(--t1)}
.btn-ghost{background:transparent;color:var(--t3)}
.btn-ghost:hover{color:var(--t2);background:rgba(255,255,255,0.05)}
.btn-full{width:100%;justify-content:center;padding:10px}
.main-content{display:flex;flex:1;overflow:hidden}
.input-panel{width:340px;min-width:280px;background:var(--bg2);border-right:1px solid var(--border);overflow-y:auto;flex-shrink:0}
.panel-section{padding:16px;border-bottom:1px solid var(--border)}
.panel-title{font-size:0.75rem;font-weight:600;text-transform:uppercase;letter-spacing:0.08em;color:var(--t3);margin-bottom:12px}
.html-input{width:100%;min-height:120px;padding:12px;background:var(--bg);border:1px solid var(--border);border-radius:var(--r);color:var(--t1);font-family:var(--m);font-size:0.78rem;line-height:1.6;resize:vertical}
.html-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(108,92,231,0.15)}
.field-group{margin-bottom:10px}
.field-group label{display:block;font-size:0.78rem;font-weight:600;color:var(--t3);margin-bottom:4px}
.meta-input{width:100%;padding:8px 10px;background:var(--bg);border:1px solid var(--border);border-radius:8px;color:var(--t1);font-family:var(--f);font-size:0.8rem;transition:border-color var(--tr)}
.meta-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(108,92,231,0.15)}
textarea.meta-input{resize:vertical;font-family:var(--f)}
select.meta-input{cursor:pointer}
.warnings-list{list-style:none;display:flex;flex-direction:column;gap:6px}
.warnings-list li{padding:8px 10px;background:rgba(251,146,60,0.08);border:1px solid rgba(251,146,60,0.2);border-radius:8px;font-size:0.78rem;color:var(--orange)}
.preview-area{flex:1;display:flex;flex-direction:column;overflow:hidden}
.preview-tabs{display:flex;background:var(--bg2);border-bottom:1px solid var(--border);padding:0 12px;gap:2px;flex-shrink:0}
.preview-tab{padding:10px 16px;background:none;border:none;border-bottom:2px solid transparent;color:var(--t3);font-family:var(--f);font-size:0.82rem;font-weight:600;cursor:pointer;transition:all var(--tr)}
.preview-tab:hover{color:var(--t2)}
.preview-tab.active{color:var(--primary);border-bottom-color:var(--primary)}
.preview-panels{flex:1;overflow-y:auto;padding:24px;display:flex;align-items:flex-start;justify-content:center;background:radial-gradient(ellipse at 50% 30%,rgba(108,92,231,0.03) 0%,transparent 60%),var(--bg)}
.preview-panel{display:none;width:100%;max-width:600px}
.preview-panel.active{display:block}
/* Google */
.google-preview{max-width:600px;font-family:Arial,sans-serif}
.gp-breadcrumb{font-size:0.82rem;color:#BDC1C6;margin-bottom:4px}
.gp-title{font-size:1.25rem;color:#8AB4F8;cursor:pointer;margin-bottom:4px;line-height:1.3}
.gp-title:hover{text-decoration:underline}
.gp-desc{font-size:0.88rem;color:#BDC1C6;line-height:1.5}
/* Twitter */
.twitter-preview{border:1px solid #2F3336;border-radius:16px;overflow:hidden;background:#000;max-width:504px}
.tp-image{height:260px;background:var(--bg3);display:flex;align-items:center;justify-content:center;color:var(--t3);object-fit:cover}
.tp-image img{width:100%;height:100%;object-fit:cover}
.tp-body{padding:12px}
.tp-title{font-size:0.92rem;font-weight:700;color:#E7E9EA;margin-bottom:2px}
.tp-desc{font-size:0.82rem;color:#71767B;margin-bottom:4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tp-domain{font-size:0.82rem;color:#71767B}
/* Facebook */
.fb-preview{border:1px solid #3E4042;overflow:hidden;background:#242526;max-width:500px}
.fb-image{height:260px;background:var(--bg3);display:flex;align-items:center;justify-content:center;color:var(--t3)}
.fb-image img{width:100%;height:100%;object-fit:cover}
.fb-body{padding:10px 12px}
.fb-domain{font-size:0.72rem;color:#B0B3B8;text-transform:uppercase;margin-bottom:4px}
.fb-title{font-size:1rem;font-weight:700;color:#E4E6EB;margin-bottom:2px;line-height:1.3}
.fb-desc{font-size:0.85rem;color:#B0B3B8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
/* LinkedIn */
.li-preview{border:1px solid #38434F;border-radius:8px;overflow:hidden;background:#1B1F23;max-width:500px}
.li-image{height:260px;background:var(--bg3);display:flex;align-items:center;justify-content:center;color:var(--t3)}
.li-image img{width:100%;height:100%;object-fit:cover}
.li-body{padding:10px 12px}
.li-title{font-size:0.92rem;font-weight:700;color:#E7E9EA;margin-bottom:4px}
.li-domain{font-size:0.78rem;color:#8B949E}
/* Discord */
.dc-preview{display:flex;background:#2F3136;border-radius:4px;overflow:hidden;max-width:420px}
.dc-accent{width:4px;background:var(--primary);flex-shrink:0}
.dc-body{padding:12px 16px;flex:1}
.dc-site{font-size:0.75rem;color:#B9BBBE;margin-bottom:4px}
.dc-title{font-size:1rem;font-weight:700;color:#00AFF4;margin-bottom:4px;cursor:pointer}
.dc-title:hover{text-decoration:underline}
.dc-desc{font-size:0.88rem;color:#DCDDDE;line-height:1.5;margin-bottom:8px}
.dc-image{max-height:200px;border-radius:4px;overflow:hidden;background:var(--bg3);display:flex;align-items:center;justify-content:center;color:var(--t3)}
.dc-image img{width:100%;max-height:200px;object-fit:cover}
@media(max-width:768px){.main-content{flex-direction:column}.input-panel{width:100%;min-width:unset;max-height:40vh;border-right:none;border-bottom:1px solid var(--border)}}
.input-panel::-webkit-scrollbar,.preview-panels::-webkit-scrollbar{width:6px}
.input-panel::-webkit-scrollbar-track,.preview-panels::-webkit-scrollbar-track{background:transparent}
.input-panel::-webkit-scrollbar-thumb,.preview-panels::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}