:root{
    --bg:#090b10;
    --panel:#11151d;
    --panel2:#161b25;
    --line:#252c3a;
    --text:#f6f7fb;
    --muted:#98a2b3;
    --accent:#7c5cff;
    --accent2:#9b87ff;
    --good:#34d399;
    --danger:#fb7185;
    --shadow:0 24px 70px rgba(0,0,0,.35);
    --radius:20px;
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;background:radial-gradient(circle at 50% -10%,#1a2040 0,#090b10 42%,#07090d 100%);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
body{min-height:100vh}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
.site-header,.room-header{height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 28px;border-bottom:1px solid rgba(255,255,255,.07);background:rgba(9,11,16,.72);backdrop-filter:blur(14px);position:sticky;top:0;z-index:20}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;letter-spacing:-.02em}
.brand-mark{width:58px;height:58px;border-radius:18px;display:grid;place-items:center;font-weight:900;background:linear-gradient(135deg,var(--accent),#3bd7ff);box-shadow:0 12px 35px rgba(124,92,255,.28)}
.brand-mark.small{width:36px;height:36px;border-radius:11px;font-size:13px}
.landing{width:min(1120px,calc(100% - 32px));margin:0 auto;padding:70px 0}
.hero-card{padding:clamp(28px,6vw,72px);border:1px solid rgba(255,255,255,.08);border-radius:32px;background:linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.025));box-shadow:var(--shadow);position:relative;overflow:hidden}
.hero-card:before{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:rgba(124,92,255,.16);filter:blur(70px);top:-180px;right:-120px;pointer-events:none}
.eyebrow{font-size:12px;font-weight:900;letter-spacing:.14em;color:#b6aaff}
h1{font-size:clamp(38px,6vw,74px);line-height:.98;letter-spacing:-.055em;margin:14px 0 22px;max-width:800px}
.hero-card>p{color:var(--muted);font-size:18px;max-width:720px;line-height:1.6}
.create-form{margin-top:34px;position:relative}
.field-label,label{display:grid;gap:8px;color:#c8ced9;font-size:14px;font-weight:700}
input{width:100%;border:1px solid var(--line);background:#0c1017;color:var(--text);border-radius:12px;padding:14px 15px;outline:none}
input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(124,92,255,.14)}
.big-input{font-size:17px;padding:18px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:14px}
.control-choice{border:1px solid var(--line);border-radius:14px;padding:14px 16px;margin:16px 0;display:flex;gap:22px;align-items:center}
.control-choice legend{padding:0 8px;color:var(--muted);font-size:12px;font-weight:800}
.control-choice label{display:flex;align-items:center;gap:8px}
.control-choice input,.radio-line input{width:auto}
.btn{border:0;border-radius:12px;padding:11px 15px;font-weight:850;transition:.18s ease}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn.primary{background:linear-gradient(135deg,var(--accent),#6245e8);color:white}
.btn.primary:hover{transform:translateY(-1px);filter:brightness(1.08)}
.btn.secondary{background:#22283a;color:white;border:1px solid #313a50}
.btn.subtle{background:transparent;color:#c4cad5;border:1px solid var(--line)}
.btn.large{padding:16px 22px;font-size:16px}
.btn.full{width:100%}
.feature-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;color:#c5cbd6}
.feature-row span{padding:9px 12px;border-radius:999px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.07);font-size:13px}
.notice{padding:12px 14px;border-radius:12px;margin:14px 0;font-size:14px}
.notice.error{background:rgba(251,113,133,.12);border:1px solid rgba(251,113,133,.32);color:#fecdd3}
.notice.success{background:rgba(52,211,153,.12);border:1px solid rgba(52,211,153,.32);color:#a7f3d0}
.auth-card{width:min(480px,calc(100% - 32px));margin:7vh auto;padding:30px;background:var(--panel);border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}
.auth-card h1{font-size:38px;margin:18px 0 10px}
.stack{display:grid;gap:14px;margin:22px 0}
.muted{color:var(--muted);line-height:1.55}
.tiny{font-size:12px}
.text-link{display:block;text-align:center;margin-top:14px;color:#b9adff}
.room-meta{display:flex;gap:10px;align-items:center;font-size:13px}
.room-code,.viewer-count,.host-badge{background:#141925;border:1px solid var(--line);border-radius:999px;padding:8px 11px}
.host-badge{font-weight:900;color:#c4baff}
.room-shell{width:min(1520px,calc(100% - 28px));margin:20px auto;display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:18px}
.watch-column{min-width:0;display:grid;gap:16px;align-content:start}
.player-card,.invite-card,.media-card,.chat-column{background:rgba(17,21,29,.92);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.player-card{overflow:hidden}
.player-wrap{aspect-ratio:16/9;background:#000;position:relative;overflow:hidden}
.player-surface{position:absolute!important;inset:0;width:100%!important;height:100%!important}
#youtubeWrap{background:#000}
#youtubePlayer,#youtubeWrap iframe,.player-wrap video{width:100%!important;height:100%!important;display:block;border:0}
.tap-sync{position:absolute;z-index:3;border:1px solid rgba(255,255,255,.18);background:rgba(10,12,18,.88);backdrop-filter:blur(10px);color:#fff;padding:14px 18px;border-radius:999px;font-weight:900}
.player-error{position:absolute;z-index:5;left:16px;right:16px;bottom:16px;background:rgba(120,24,40,.94);color:#fff;padding:13px 15px;border-radius:12px;font-size:13px;display:grid;gap:4px;box-shadow:0 10px 30px rgba(0,0,0,.28)}
.player-error-title{font-size:14px}
.player-error-text{line-height:1.45;color:#ffe4e8}
.sync-bar{display:flex;justify-content:space-between;align-items:center;padding:12px 14px;border-top:1px solid var(--line);font-size:13px;color:#c3cad6}
.compat-bar{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 14px;border-top:1px solid var(--line);background:#0d121a}
.compat-summary{display:flex;align-items:center;gap:10px;min-width:0}
.compat-summary>div{display:grid;gap:2px;min-width:0}
.compat-summary strong{font-size:13px;color:#e8ebf2}
.compat-summary span:not(.compat-icon){font-size:11px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.compat-icon{width:22px;height:22px;flex:0 0 22px;border-radius:50%;display:grid;place-items:center;font-size:12px;font-weight:950;background:#202735;color:#aab3c3}
.compat-bar.state-good .compat-icon{background:rgba(52,211,153,.14);color:#6ee7b7}
.compat-bar.state-warn .compat-icon{background:rgba(251,191,36,.14);color:#fcd34d}
.compat-bar.state-bad .compat-icon{background:rgba(251,113,133,.14);color:#fda4af}
.compat-toggle{border:0;background:transparent;color:#b9adff;font-size:12px;font-weight:850;padding:6px 2px;white-space:nowrap}
.compat-panel{border-top:1px solid var(--line);padding:14px;background:#0b1017}
.compat-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:9px}
.compat-item{border:1px solid #202837;background:#111720;border-radius:11px;padding:10px;display:grid;gap:5px;min-width:0}
.compat-item span{font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:#7f8a9c;font-weight:850}
.compat-item strong{font-size:12px;overflow-wrap:anywhere}
.compat-good{color:#6ee7b7!important}
.compat-warn{color:#fcd34d!important}
.compat-bad{color:#fda4af!important}
.compat-note{font-size:11px;color:var(--muted);line-height:1.5;margin:11px 2px 0}
.sync-actions{display:flex;gap:8px}
.sync-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--good);margin-right:7px;box-shadow:0 0 14px rgba(52,211,153,.8)}
.sync-dot.bad{background:var(--danger);box-shadow:0 0 14px rgba(251,113,133,.6)}
.invite-card,.media-card{padding:18px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.invite-card>div,.media-card>div{display:grid;gap:6px;min-width:0}
.invite-card strong{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.invite-card small,.media-card p{color:var(--muted);margin:0;font-size:12px}
.media-form{display:flex;gap:8px;width:min(520px,60%)}
.chat-column{height:calc(100vh - 112px);position:sticky;top:92px;display:grid;grid-template-rows:auto 1fr auto;overflow:hidden}
.chat-head{display:flex;align-items:center;justify-content:space-between;padding:16px;border-bottom:1px solid var(--line)}
.chat-head>div{display:grid;gap:5px}
.chat-close{display:none;border:0;background:transparent;color:white;font-size:28px}
.messages{padding:16px;overflow:auto;display:flex;flex-direction:column;gap:12px}
.message{background:#171d28;border:1px solid #242c3b;border-radius:14px;padding:11px 12px}
.message-meta{display:flex;justify-content:space-between;gap:10px;font-size:11px;color:var(--muted);margin-bottom:5px}
.message-meta strong{color:#c9c0ff}
.message-body{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.45;font-size:14px}
.chat-form{padding:12px;border-top:1px solid var(--line);display:flex;gap:8px}
.chat-fab{display:none}
.modal{position:fixed;inset:0;background:rgba(0,0,0,.64);z-index:50;display:grid;place-items:center;padding:20px}
.modal-card{width:min(460px,100%);background:var(--panel2);border:1px solid var(--line);border-radius:20px;padding:24px;box-shadow:var(--shadow);position:relative}
.modal-x{position:absolute;right:14px;top:10px;border:0;background:transparent;color:white;font-size:28px}
.modal-card h2{margin:10px 0 18px}
.radio-line{display:flex;align-items:center;gap:10px;padding:12px;border:1px solid var(--line);border-radius:12px;margin:9px 0;background:#111620}
[hidden]{display:none!important}
code{background:#0c1017;border:1px solid var(--line);padding:2px 5px;border-radius:6px}

@media (max-width: 900px){
    .room-shell{grid-template-columns:1fr;margin-bottom:82px}
    .chat-column{position:fixed;z-index:40;left:0;right:0;bottom:0;top:auto;height:min(76vh,640px);border-radius:22px 22px 0 0;transform:translateY(110%);transition:transform .22s ease}
    .chat-column.open{transform:translateY(0)}
    .chat-close{display:block}
    .chat-fab{display:block;position:fixed;z-index:35;right:18px;bottom:18px;border:0;border-radius:999px;padding:13px 17px;background:var(--accent);color:white;font-weight:900;box-shadow:var(--shadow)}
    .media-card,.invite-card{align-items:stretch;flex-direction:column}
    .media-form{width:100%}
}
@media (max-width: 640px){
    .site-header,.room-header{height:62px;padding:0 14px}
    .site-header .brand span:last-child,.room-header .brand span:last-child{display:none}
    .room-code{display:none}
    .landing{padding:26px 0}
    .hero-card{border-radius:22px;padding:24px 18px}
    .hero-card h1{font-size:42px}
    .form-grid{grid-template-columns:1fr}
    .control-choice{align-items:flex-start;flex-direction:column;gap:10px}
    .room-shell{width:calc(100% - 16px);margin:8px auto}
    .player-card,.invite-card,.media-card{border-radius:14px}
    .player-wrap{aspect-ratio:16/9}
    .sync-bar{gap:8px}
    .sync-actions .btn{padding:9px 10px;font-size:12px}
    .compat-grid{grid-template-columns:1fr 1fr}
    .compat-summary span:not(.compat-icon){max-width:240px}
    .invite-card,.media-card{padding:14px}
    .media-form{flex-direction:column}
}

@media (max-width: 430px){
    .compat-grid{grid-template-columns:1fr}
    .compat-summary span:not(.compat-icon){max-width:190px}
}