:root{
  --void:#020104;--black:#020104;--ink:#08050d;--panel:#111018;--panel-2:#171320;
  --text:#eee9f5;--muted:#95889f;--line:#2b2433;--line-2:#3a3046;
  --violet:#75627f;--violet-2:#5c4b67;--pink:#9a7aa6;--pink-2:#7b5d88;
  --lilac:#c4b5cf;--cyan:#9184a0;--danger:#b77786;--ok:#7ea08c;
  --shadow:0 26px 90px rgba(0,0,0,.62);--radius:24px;--app-height:100vh;--app-top:0px;
}
*{box-sizing:border-box}html,body,#app{height:100%;overflow:hidden;overscroll-behavior:none}body{margin:0;background:var(--black);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased;text-rendering:geometricPrecision}button,input,textarea,select{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,.bt21-card:focus-within{outline:2px solid var(--lilac);outline-offset:3px}input,textarea,select{width:100%;border:1px solid var(--line);border-radius:16px;background:#05020a;color:var(--text);padding:13px 14px;outline:none;font-size:16px}input::placeholder,textarea::placeholder{color:#78658c}input:focus,textarea:focus,select:focus{border-color:var(--violet);box-shadow:0 0 0 4px rgba(139,92,246,.17)}textarea{resize:vertical}.muted{color:var(--muted)}.brand{font:900 12px/1 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.22em;text-transform:uppercase;color:var(--lilac)}
.btn{border:0;border-radius:16px;background:linear-gradient(135deg,#6e5a78,#8a6a96);color:#f5f0f8;font-weight:900;padding:12px 16px;min-height:44px;box-shadow:0 14px 34px rgba(80,62,92,.24);touch-action:manipulation;-webkit-tap-highlight-color:transparent}.btn:hover{filter:brightness(1.08)}.btn.secondary{background:rgba(18,8,34,.9);color:#efe7ff;border:1px solid var(--line-2);box-shadow:none}.btn.danger{background:linear-gradient(135deg,#fb7185,#be123c);color:#fff}.btn.small{padding:8px 11px;min-height:34px;border-radius:12px;font-size:13px}.link{background:none;border:0;color:var(--lilac);padding:0;font-weight:800;touch-action:manipulation}.link:hover{color:white}.row{display:flex;gap:12px;align-items:center;justify-content:space-between;min-width:0}.form{display:grid;gap:14px;margin-top:20px}.toast{position:fixed;left:50%;bottom:calc(18px + env(safe-area-inset-bottom));transform:translateX(-50%);z-index:50;display:none;max-width:calc(100vw - 32px);padding:11px 16px;border:1px solid rgba(154,122,166,.32);border-radius:999px;background:rgba(8,6,12,.96);box-shadow:0 18px 50px rgba(0,0,0,.45);color:var(--text);text-align:center}.toast.show{display:block}
/* Auth / profile setup */
.shell{position:relative;height:var(--app-height);max-height:var(--app-height);overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;display:flex;align-items:center;justify-content:center;padding:24px;padding-top:max(24px,env(safe-area-inset-top));padding-bottom:calc(30px + env(safe-area-inset-bottom));background:radial-gradient(circle at 16% 8%,rgba(117,98,127,.18),transparent 36%),radial-gradient(circle at 86% 92%,rgba(72,54,82,.14),transparent 32%),#020104}.shell:before{content:"";position:fixed;inset:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.02) 1px,transparent 1px);background-size:38px 38px;mask-image:radial-gradient(circle at center,#000 0,transparent 78%)}.card{position:relative;width:min(500px,100%);padding:28px;border:1px solid rgba(220,199,255,.18);border-radius:var(--radius);background:linear-gradient(180deg,rgba(18,8,34,.96),rgba(5,2,10,.96));box-shadow:var(--shadow);overflow:hidden}.card:before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:linear-gradient(90deg,#5d4c66,#8a6a96,#5a5361)}.auth-card{margin:auto 0}.sigil{width:56px;height:56px;margin-bottom:15px;border-radius:20px;display:grid;place-items:center;background:linear-gradient(135deg,#221a2a,#7a6285);box-shadow:0 0 30px rgba(122,98,133,.26);font:950 15px/1 ui-rounded,"Arial Rounded MT Bold",system-ui;letter-spacing:.06em}.card h1{margin:9px 0 4px;font:950 clamp(28px,6vw,38px)/1.04 ui-rounded,"Arial Rounded MT Bold",system-ui;letter-spacing:-.04em;color:white}.card p{line-height:1.55}.bt21-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.bt21-card{--c:var(--violet);min-height:92px;display:grid;gap:7px;place-items:center;padding:10px;border:1px solid var(--line);border-radius:18px;background:linear-gradient(180deg,rgba(255,255,255,.035),rgba(255,255,255,.01));color:var(--text);transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease;touch-action:manipulation}.bt21-card input{display:none}.bt21-card.active,.bt21-card:hover{transform:translateY(-2px);border-color:var(--c);box-shadow:0 0 0 2px color-mix(in srgb,var(--c) 26%,transparent),0 14px 32px rgba(0,0,0,.34)}.bt21-card b{font-size:11px;letter-spacing:.08em}.bt21-face,.avatar{--c:var(--violet);width:43px;height:43px;border-radius:17px;display:grid;place-items:center;background:linear-gradient(135deg,color-mix(in srgb,var(--c) 92%,white),#1a0a2d);border:1px solid rgba(255,255,255,.18);box-shadow:0 0 22px color-mix(in srgb,var(--c) 38%,transparent);color:#fff;font:950 12px/1 ui-rounded,"Arial Rounded MT Bold",system-ui;text-shadow:0 1px 3px rgba(0,0,0,.35)}
/* Chat */
.chat{position:fixed;left:0;right:0;top:var(--app-top);height:var(--app-height);max-height:var(--app-height);display:grid;grid-template-rows:auto minmax(0,1fr) auto;background:#020104;overflow:hidden}.chat:before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(180deg,#5d4c66,#8a6a96,#3b3342);box-shadow:0 0 22px rgba(122,98,133,.28);opacity:.8;z-index:1}.top{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 18px 14px 22px;border-bottom:1px solid var(--line);background:rgba(0,0,0,.86);backdrop-filter:blur(18px)}.room-title{display:flex;align-items:center;gap:10px;color:white;text-transform:uppercase;font:950 17px/1 ui-rounded,"Arial Rounded MT Bold",system-ui;letter-spacing:.1em}.orb{width:12px;height:12px;border-radius:999px;background:#8a6a96;box-shadow:0 0 18px rgba(138,106,150,.45),0 0 34px rgba(92,75,103,.24)}.top-actions{display:flex;gap:8px;align-items:center;justify-content:flex-end;flex-wrap:wrap}.top-actions .btn{white-space:nowrap}.main{min-height:0;display:grid;grid-template-columns:minmax(0,1fr) 270px;overflow:hidden}.messages{min-height:0;padding:20px 20px 20px 26px;overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;background:#020104}.history-wrap{position:sticky;top:0;z-index:4;display:flex;justify-content:center;padding:6px;pointer-events:none}.history-btn{pointer-events:auto;box-shadow:0 14px 38px rgba(0,0,0,.45)}.msg{display:grid;grid-template-columns:44px minmax(0,1fr);gap:12px;max-width:900px;margin:0 0 18px}.avatar.small{width:28px;height:28px;border-radius:11px;font-size:10px;box-shadow:none}.msg-head{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.name{font-weight:950}.time,.burn-badge{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.time{font-size:12px;color:#7f708e}.bubble{display:inline-block;max-width:100%;margin-top:5px;padding:10px 13px;border:1px solid rgba(220,199,255,.13);border-radius:18px 18px 18px 7px;background:linear-gradient(180deg,rgba(22,10,39,.9),rgba(8,3,15,.9));box-shadow:0 14px 32px rgba(0,0,0,.32);color:#f1e9ff;white-space:pre-wrap;word-break:break-word;line-height:1.48}.msg.ephemeral .bubble{border-color:rgba(154,122,166,.36);background:linear-gradient(180deg,rgba(31,24,37,.94),rgba(9,6,12,.95))}.burn-badge{padding:2px 7px;border:1px solid rgba(154,122,166,.36);border-radius:999px;background:rgba(122,98,133,.14);color:#d9cbe1;font-size:11px}.system{width:max-content;max-width:90%;margin:14px auto;padding:6px 10px;border:1px solid rgba(220,199,255,.1);border-radius:999px;background:rgba(255,255,255,.025);color:#887797;font-size:13px;text-align:center}.members{min-height:0;padding:16px;border-left:1px solid var(--line);background:linear-gradient(180deg,#07020d,#030005);overflow-y:auto;-webkit-overflow-scrolling:touch}.members h3{margin:0 0 14px;color:var(--lilac);font:900 13px/1 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:.14em;text-transform:uppercase}.member{display:flex;align-items:center;gap:10px;margin-bottom:12px;color:#efe7ff;min-width:0}.member span:last-child{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.composer{position:relative;z-index:2;display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:10px;padding:14px 14px 14px 22px;border-top:1px solid var(--line);background:#07050a}.composer input{min-width:0}.composer .btn{min-width:76px}.burn-toggle{min-height:44px;padding:0 12px;border:1px solid rgba(154,122,166,.30);border-radius:15px;background:#18111d;color:#d9cbe1;font:950 12px/1 ui-monospace,SFMono-Regular,Menlo,monospace;touch-action:manipulation}.burn-toggle.active{background:linear-gradient(135deg,#8a6a96,#5c4b67);color:#fff;box-shadow:0 0 22px rgba(122,98,133,.28)}
/* Admin */
.admin{height:var(--app-height);max-height:var(--app-height);min-height:0;padding:24px;padding-top:calc(24px + env(safe-area-inset-top));padding-bottom:calc(36px + env(safe-area-inset-bottom));overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;background:radial-gradient(circle at 10% 0,rgba(139,92,246,.12),transparent 32%),#000}.admin>.row:first-child{position:sticky;top:0;z-index:5;margin:-24px -24px 18px;padding:calc(18px + env(safe-area-inset-top)) 24px 16px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,rgba(0,0,0,.97),rgba(0,0,0,.84));backdrop-filter:blur(16px)}.admin h1{margin:.25rem 0 0;font:950 30px/1 ui-rounded,"Arial Rounded MT Bold",system-ui;letter-spacing:-.03em}.admin-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px}.panel{min-width:0;padding:18px;border:1px solid var(--line);border-radius:20px;background:linear-gradient(180deg,rgba(18,8,34,.88),rgba(6,2,11,.88));box-shadow:0 20px 60px rgba(0,0,0,.25)}.panel h2{margin:0 0 12px;color:#fff}.item{padding:12px 0;border-top:1px solid rgba(220,199,255,.11);overflow-wrap:anywhere}.badge{display:inline-flex;align-items:center;gap:4px;padding:4px 8px;border-radius:999px;background:#1b102a;color:var(--muted);font:800 12px/1 ui-monospace,SFMono-Regular,Menlo,monospace}.admin .row{flex-wrap:wrap}.admin .row>*{min-width:0}
/* Drawer */
.profile-drawer{position:fixed;inset:0;z-index:30;display:grid;align-items:end;justify-items:center;padding:18px;background:rgba(0,0,0,.62);backdrop-filter:blur(10px);overflow-y:auto;-webkit-overflow-scrolling:touch}.profile-drawer[hidden]{display:none}.drawer-panel{width:min(540px,100%);max-height:min(86vh,calc(var(--app-height) - 32px));overflow-y:auto;-webkit-overflow-scrolling:touch;padding:20px;border:1px solid rgba(220,199,255,.18);border-radius:26px;background:linear-gradient(180deg,#160b29,#050109);box-shadow:0 24px 90px rgba(0,0,0,.62)}.drawer-panel h2{margin:0;font:950 24px/1 ui-rounded,"Arial Rounded MT Bold",system-ui}
@media (prefers-reduced-motion:no-preference){.card,.panel,.drawer-panel{animation:rise .32s ease both}@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}}
@media(max-width:760px){.shell{align-items:flex-start;padding:16px;padding-top:calc(18px + env(safe-area-inset-top));padding-bottom:calc(30px + env(safe-area-inset-bottom))}.card{width:100%;padding:20px;border-radius:22px}.card h1{font-size:29px}.sigil{width:48px;height:48px;border-radius:16px}.row{align-items:flex-start;flex-wrap:wrap}.row .link{padding:8px 0}.btn{width:100%}.btn.small{width:auto}.bt21-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.bt21-card{min-height:82px}.bt21-face,.avatar{width:38px;height:38px;border-radius:14px}.top{display:grid;grid-template-columns:1fr;gap:10px;padding:12px 12px 12px 18px}.room-title{font-size:14px}.top-actions{justify-content:flex-start}.top-actions .btn.small{padding:7px 9px;font-size:12px}.main{grid-template-columns:1fr}.members{display:none}.messages{padding:12px 12px 18px 18px}.msg{grid-template-columns:40px minmax(0,1fr);gap:10px}.bubble{font-size:15px}.composer{grid-template-columns:auto minmax(0,1fr) auto;gap:8px;padding:10px 10px calc(10px + env(safe-area-inset-bottom)) 16px}.composer .btn{width:auto;min-width:58px}.burn-toggle{padding:0 10px}.admin{padding:14px;padding-top:calc(14px + env(safe-area-inset-top));padding-bottom:calc(30px + env(safe-area-inset-bottom))}.admin>.row:first-child{margin:-14px -14px 14px;padding:calc(14px + env(safe-area-inset-top)) 14px 12px}.admin-grid{grid-template-columns:1fr;gap:14px}.panel{padding:14px;border-radius:17px}.panel h2{font-size:19px}.item .btn{width:auto;margin-top:8px}.profile-drawer{padding:10px}.drawer-panel{padding:16px;border-radius:22px 22px 18px 18px}.toast{bottom:calc(12px + env(safe-area-inset-bottom))}}
@media(max-width:380px){.composer{grid-template-columns:1fr auto}.burn-toggle{grid-column:1 / -1;height:38px}.composer input{grid-column:1}.composer .btn{grid-column:2;grid-row:2}.top-actions{gap:6px}.top-actions .btn.small{font-size:11px}.bt21-grid{grid-template-columns:1fr 1fr}}


/* Real BT21 avatar assets */
.bt21-face,.avatar{overflow:hidden;background:#fff;padding:2px;color:transparent;text-shadow:none}.bt21-face img,.avatar img{width:100%;height:100%;display:block;object-fit:cover;border-radius:inherit}.bt21-card.active .bt21-face,.bt21-card:hover .bt21-face{box-shadow:0 0 0 2px color-mix(in srgb,var(--c) 38%,transparent),0 0 24px color-mix(in srgb,var(--c) 42%,transparent)}.avatar.small{padding:1px}.msg .avatar{background:#fff}.member .avatar{flex:0 0 auto}

.form-error{margin:0;padding:10px 12px;border:1px solid rgba(251,113,133,.45);border-radius:14px;background:rgba(127,29,29,.22);color:#fecdd3;font-size:13px;line-height:1.45}
.form-error[hidden]{display:none}

/* Narrow Gate visual pass */
.brand{color:#b9a8c3;letter-spacing:.18em}.card h1,.admin h1,.drawer-panel h2{letter-spacing:-.02em}.auth-card:after{content:"";position:absolute;right:18px;top:18px;width:42px;height:58px;border:1px solid rgba(196,181,207,.16);border-bottom:0;border-radius:20px 20px 0 0;box-shadow:inset 0 0 0 8px rgba(196,181,207,.025);pointer-events:none}.sigil{color:#f1ebf5;font-size:22px;letter-spacing:0}.room-title{text-transform:none;letter-spacing:.06em}.bubble{background:linear-gradient(180deg,rgba(20,16,25,.94),rgba(9,7,12,.96));border-color:rgba(196,181,207,.11);color:#eee9f5}.members{background:linear-gradient(180deg,#08060b,#030205)}

/* Narrow Gate auth simplification */
.auth-card h1:first-child{margin-top:0}.auth-card .muted:first-of-type{margin-top:10px}.auth-card:after{opacity:.72}

/* Ephemeral clock button */
.burn-toggle{width:46px;display:grid;place-items:center;padding:0}
.clock-icon{position:relative;width:18px;height:18px;border:2px solid currentColor;border-radius:50%;display:inline-block}
.clock-icon:before,.clock-icon:after{content:"";position:absolute;left:50%;top:50%;width:2px;background:currentColor;border-radius:999px;transform-origin:50% 0}
.clock-icon:before{height:6px;transform:translate(-50%,-1px) rotate(0deg)}
.clock-icon:after{height:5px;transform:translate(-50%,-1px) rotate(120deg)}
.burn-toggle.active .clock-icon{animation:clockPulse 1.6s ease-in-out infinite}
@keyframes clockPulse{0%,100%{transform:scale(1)}50%{transform:scale(1.08)}}
@media(max-width:380px){.burn-toggle{width:100%;height:38px}}


/* Monochrome system pass: BT21 remains the only color source */
:root{
  --void:#030303;--black:#030303;--ink:#0b0b0b;--panel:#111;--panel-2:#171717;
  --text:#f2f2f2;--muted:#8e8e8e;--line:#242424;--line-2:#383838;
  --violet:#777;--violet-2:#5f5f5f;--pink:#9a9a9a;--pink-2:#7b7b7b;
  --lilac:#d0d0d0;--cyan:#a8a8a8;--danger:#b8b8b8;--ok:#a5a5a5;
  --shadow:0 26px 90px rgba(0,0,0,.68);
}
body{background:#030303;color:var(--text)}
button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,.bt21-card:focus-within{outline-color:#e6e6e6}
input,textarea,select{background:#080808;border-color:#272727;color:#f2f2f2}
input::placeholder,textarea::placeholder{color:#777}input:focus,textarea:focus,select:focus{border-color:#bdbdbd;box-shadow:0 0 0 4px rgba(255,255,255,.08)}
.brand{color:#bdbdbd}.muted{color:#8e8e8e}
.btn{background:linear-gradient(135deg,#f1f1f1,#a9a9a9);color:#050505;box-shadow:0 14px 34px rgba(255,255,255,.08)}
.btn.secondary{background:#111;color:#eee;border-color:#343434}.btn.danger{background:linear-gradient(135deg,#d8d8d8,#777);color:#050505}.link{color:#d8d8d8}.link:hover{color:#fff}
.toast{bottom:calc(88px + env(safe-area-inset-bottom));border-color:#3a3a3a;background:rgba(10,10,10,.96);color:#f0f0f0;box-shadow:0 18px 50px rgba(0,0,0,.58)}
.chat~.toast{bottom:calc(88px + env(safe-area-inset-bottom))}.shell~.toast,.admin~.toast{bottom:calc(18px + env(safe-area-inset-bottom))}
.shell{background:radial-gradient(circle at 18% 8%,rgba(255,255,255,.055),transparent 34%),#030303}.shell:before{opacity:.35}.card{background:linear-gradient(180deg,rgba(20,20,20,.96),rgba(6,6,6,.96));border-color:#242424}.card:before{background:linear-gradient(90deg,#444,#e7e7e7,#444)}.auth-card:after{border-color:rgba(255,255,255,.12);box-shadow:inset 0 0 0 8px rgba(255,255,255,.018)}
.chat{background:#030303}.chat:before{background:linear-gradient(180deg,#2e2e2e,#d8d8d8,#2e2e2e);box-shadow:0 0 22px rgba(255,255,255,.12)}.top{background:rgba(5,5,5,.88);border-color:#222}.room-title{color:#f5f5f5}.orb{background:#d9d9d9;box-shadow:0 0 18px rgba(255,255,255,.22)}
.messages{background:#030303}.members{background:linear-gradient(180deg,#090909,#040404);border-color:#222}.members h3{color:#d0d0d0}.member{color:#e8e8e8}.composer{background:#070707;border-color:#222}.system{border-color:#262626;background:rgba(255,255,255,.035);color:#8d8d8d}
.burn-toggle{background:#101010;border-color:#3a3a3a;color:#dfdfdf}.burn-toggle.active{background:#eeeeee;color:#060606;box-shadow:0 0 22px rgba(255,255,255,.13)}.burn-badge{border-color:#3d3d3d;background:#121212;color:#d0d0d0}
.panel{background:linear-gradient(180deg,rgba(18,18,18,.9),rgba(7,7,7,.9));border-color:#252525}.admin{background:radial-gradient(circle at 10% 0,rgba(255,255,255,.045),transparent 32%),#030303}.admin>.row:first-child{border-color:#222;background:linear-gradient(180deg,rgba(4,4,4,.97),rgba(4,4,4,.84))}.badge{background:#171717;color:#aaa}.drawer-panel{background:linear-gradient(180deg,#151515,#060606);border-color:#282828}
/* Message color comes only from the sender's BT21 role color */
.msg{--c:#8f8f8f}.msg .name{color:var(--c)}.bubble{border-color:color-mix(in srgb,var(--c) 38%,#303030);background:linear-gradient(180deg,color-mix(in srgb,var(--c) 18%,#141414),color-mix(in srgb,var(--c) 8%,#070707));box-shadow:0 14px 32px rgba(0,0,0,.34);color:#f5f5f5}.msg.ephemeral .bubble{border-color:color-mix(in srgb,var(--c) 58%,#555);background:linear-gradient(180deg,color-mix(in srgb,var(--c) 24%,#151515),#080808)}
/* BT21 selection keeps character colors */
.bt21-card.active,.bt21-card:hover{border-color:var(--c);box-shadow:0 0 0 2px color-mix(in srgb,var(--c) 26%,transparent),0 14px 32px rgba(0,0,0,.34)}
@media(max-width:760px){.toast{bottom:calc(78px + env(safe-area-inset-bottom))}.chat~.toast{bottom:calc(78px + env(safe-area-inset-bottom))}.shell~.toast,.admin~.toast{bottom:calc(12px + env(safe-area-inset-bottom))}}

/* Monochrome form states */
.form-error{border-color:#444;background:#121212;color:#e0e0e0}