*{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#1c1b1a;--panel:#242321;--panel2:#2e2d2b;--panel3:#383634;
  --border:#35322f;--border2:#454240;
  --fg:#eceae8;--mut:#8f8b85;--mut2:#6b6862;
  --grn:#7cc37f;--code-bg:#211f1e;
  --tk-k:#ff7b72;--tk-s:#a5d6ff;--tk-n:#79c0ff;--tk-c:#8b949e;--tk-f:#d2a8ff;--tk-b:#ffa657;
}
html,body{height:100%}
body{background:var(--bg);color:var(--fg);font-family:Inter,-apple-system,"Segoe UI",system-ui,sans-serif;font-size:14px;overflow:hidden;-webkit-font-smoothing:antialiased}
.app{display:flex;height:100vh}

/* ---------- sidebar ---------- */
.side{width:264px;min-width:264px;background:#1a1918;border-right:1px solid var(--border);display:flex;flex-direction:column;padding:14px 12px;gap:6px;transition:margin .2s ease}
body.collapsed .side{margin-left:-264px}
body.collapsed .expand-fab{display:flex}
.side-top{display:flex;align-items:center;justify-content:space-between;padding:0 4px 8px}
.brand{display:flex;gap:9px;align-items:center}
.logo{width:26px;height:26px;display:flex;align-items:center;justify-content:center}
.logo svg{width:26px;height:26px}
.wordmark{font-weight:600;font-size:15.5px;letter-spacing:-.01em;color:#faf9f7}
.icon-btn{background:none;border:none;color:var(--mut);cursor:pointer;padding:6px;border-radius:7px;display:flex}
.icon-btn:hover{color:var(--fg);background:var(--panel2)}
.icon-btn svg{width:16px;height:16px}
.expand-fab{display:none;position:fixed;top:14px;left:14px;z-index:20;width:32px;height:32px;align-items:center;justify-content:center;background:var(--panel);border:1px solid var(--border2);border-radius:8px;color:var(--mut);cursor:pointer}
.expand-fab:hover{color:var(--fg)}
.expand-fab svg{width:15px;height:15px}
.new-btn{display:flex;align-items:center;gap:8px;width:100%;background:var(--panel);border:1px solid var(--border);color:var(--fg);border-radius:10px;padding:9px 11px;font:inherit;font-size:13px;font-weight:500;cursor:pointer;text-align:left;margin:4px 0 8px}
.new-btn svg{width:14px;height:14px;color:var(--mut)}
.new-btn:hover{border-color:var(--border2);background:var(--panel2)}
.new-btn,.file,.mode-chip,.mini,.cbtn,.send,.icon-btn,.hint-chip{transition:all .15s ease}
.side-label{font-size:10.5px;text-transform:uppercase;letter-spacing:.07em;color:var(--mut2);padding:10px 8px 4px;font-weight:600}
.files{flex:0 1 auto;overflow-y:auto;display:flex;flex-direction:column;gap:2px}
.files:has(.dim){display:block}
.file{display:flex;align-items:center;gap:9px;padding:7px 8px;border-radius:8px;cursor:pointer;font-size:13px;color:#d8d5d1}
.file:hover{background:var(--panel2);transform:translateX(2px)}
.file svg{width:14px;height:14px;color:var(--mut);flex:none}
.file .fs{margin-left:auto;color:var(--mut2);font-size:11px}
.file.eng{cursor:default;color:var(--mut);font-size:12.5px}
.pad{padding:8px}
.dim{color:var(--mut2);font-size:12px;line-height:1.5}
.side-foot{margin-top:auto;font-size:11px;color:var(--mut2);padding:10px 8px 2px;border-top:1px solid var(--border);display:flex;align-items:center;gap:7px}
.side-foot .dot{width:7px;height:7px;border-radius:50%;background:var(--grn);flex:none;animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{0%,100%{opacity:1;box-shadow:0 0 0 0 rgba(124,195,127,.35)}50%{opacity:.55;box-shadow:0 0 0 4px rgba(124,195,127,0)}}

/* ---------- thread ---------- */
.main{flex:1;display:flex;flex-direction:column;min-width:0;background:var(--bg)}
.thread{flex:1;overflow-y:auto;padding:30px 0 22px;display:flex;flex-direction:column;align-items:center}
.thread>*{width:min(720px,94%)}
.empty{margin:auto;text-align:center;padding:30px 0}
.hero-mark{width:44px;height:44px;margin:0 auto 20px;color:#faf9f7;animation:hero-breathe 4s ease-in-out infinite}
.hero-mark svg{width:44px;height:44px}
@keyframes hero-breathe{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.75;transform:scale(.96)}}
.empty h1{font-size:24px;font-weight:600;letter-spacing:-.02em;margin-bottom:12px;color:#faf9f7}
.empty h1.grad{background:linear-gradient(100deg,#6b6862 0%,#f4f3f1 25%,#8f8b85 50%,#eceae8 75%,#6b6862 100%);background-size:220% 100%;-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;animation:grad-sheen 4s linear infinite}
@keyframes grad-sheen{0%{background-position:200% 0}100%{background-position:-20% 0}}
.empty p{color:var(--mut);max-width:480px;margin:0 auto 26px;line-height:1.6;font-size:14px}
.empty p b{color:#d8d5d1;font-weight:500}
.chips{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.hint-chip{display:flex;align-items:center;gap:7px;background:var(--panel);border:1px solid var(--border);border-radius:999px;padding:8px 15px;font-size:12.5px;color:var(--mut);cursor:pointer;font:inherit}
.hint-chip span{font-size:13px}
.hint-chip:hover{color:var(--fg);border-color:var(--border2);background:var(--panel2)}

/* ---------- messages ---------- */
.msg{margin-bottom:24px;display:flex;flex-direction:column;animation:msg-in .28s cubic-bezier(.2,.8,.3,1)}
@keyframes msg-in{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.bubble{animation:bub-in .32s cubic-bezier(.2,.8,.3,1)}
@keyframes bub-in{from{opacity:0;transform:scale(.985)}to{opacity:1;transform:none}}
.msg .who{font-size:11px;text-transform:uppercase;letter-spacing:.07em;color:var(--mut2);margin-bottom:8px;display:flex;align-items:center;gap:7px;font-weight:600}
.msg .who .av{width:19px;height:19px;border-radius:5px;background:var(--panel3);display:inline-flex;align-items:center;justify-content:center;color:#faf9f7}
.msg .who .av svg{width:12px;height:12px}
.msg .who .t{font-size:10px;color:#55524e;text-transform:none;font-weight:400;margin-left:2px}
.msg:has(.bubble.input){align-items:flex-end}
.msg:has(.bubble.input) .who{flex-direction:row-reverse}
.bubble{background:var(--code-bg);border:1px solid var(--border);border-radius:12px;padding:13px 15px;font-family:"SF Mono","Cascadia Code","JetBrains Mono",ui-monospace,monospace;font-size:12.5px;line-height:1.65;white-space:pre-wrap;word-break:break-word;max-height:460px;overflow-y:auto;color:#d6d3cf}
.bubble.input{background:#252423;max-height:180px;color:#cfccc8}
.bubble .meta{font-family:Inter,-apple-system,sans-serif;color:var(--mut);font-size:11.5px;margin-top:10px;white-space:normal;line-height:1.55}
.row{display:flex;gap:8px;margin-top:8px}
.mini{background:var(--panel);border:1px solid var(--border);color:#d8d5d1;border-radius:8px;padding:5px 12px;font-size:12px;cursor:pointer;font:inherit}
.mini:hover{border-color:var(--border2);background:var(--panel2)}
.chip{display:inline-block;background:var(--panel2);border:1px solid var(--border);border-radius:999px;padding:3px 11px;font-size:11px;color:var(--mut);margin:2px;font-family:Inter,sans-serif}
.chip b{color:#d8d5d1;font-weight:500}
.chip.hit{border-color:#3f6b44;color:#c9e6cb}
.chip.hit b{color:var(--grn)}
.err{color:#ff9a92}
.ok{color:var(--grn)}

/* lua tokens */
.tk-k{color:var(--tk-k)}           /* keywords — coral red */
.tk-s{color:var(--tk-s)}           /* strings — light blue */
.tk-n{color:var(--tk-n)}           /* numbers — blue */
.tk-c{color:var(--tk-c);font-style:italic} /* comments — gray */
.tk-f{color:var(--tk-f)}           /* function names — purple */
.tk-b{color:var(--tk-b)}           /* builtins/roblox api — orange */

/* ---------- composer ---------- */
.composer-wrap{padding:0 0 16px;display:flex;flex-direction:column;align-items:center;gap:7px}
.composer-wrap>*{width:min(720px,94%)}

.composer{position:relative;border-radius:20px;padding:1.5px;background:linear-gradient(120deg,#454240,#6b6862,#3a3835,#8f8b85,#454240);background-size:300% 300%;animation:ring-sheen 7s ease-in-out infinite;transition:box-shadow .3s ease}
.composer:focus-within{background:linear-gradient(120deg,#8f8b85,#f4f3f1 30%,#6b6862 55%,#c8c5c0 80%,#8f8b85);background-size:300% 300%;animation:ring-sheen 3.5s linear infinite;box-shadow:0 0 0 4px rgba(236,234,232,.05),0 8px 32px rgba(0,0,0,.45)}
.composer-in{background:var(--panel);border-radius:18.5px;padding:11px 11px 8px;display:flex;flex-direction:column;gap:4px}
@keyframes ring-sheen{0%{background-position:0% 50%}50%{background-position:100% 50%}100%{background-position:0% 50%}}
#composer{background:none;border:none;color:var(--fg);font:inherit;font-size:14.5px;resize:none;max-height:200px;outline:none;line-height:1.5;padding:2px 6px 8px;caret-color:#f4f3f1}
#composer::placeholder{color:#5f5c58;transition:color .2s}
.composer:focus-within #composer::placeholder{color:#4a4743}
.composer-bar{display:flex;align-items:center;justify-content:space-between;gap:8px}
.cb-left{display:flex;align-items:center;gap:6px;min-width:0;flex-wrap:wrap}
.cbtn{width:30px;height:30px;flex:none;background:none;border:none;color:var(--mut);border-radius:999px;cursor:pointer;display:flex;align-items:center;justify-content:center}
.cbtn:hover{color:var(--fg);background:var(--panel2)}
.cbtn svg{width:16px;height:16px}
.mode-group{display:flex;gap:4px}
.mode-chip{background:none;border:1px solid transparent;color:var(--mut);padding:5px 11px;border-radius:999px;cursor:pointer;font:inherit;font-size:12px}
.mode-chip:hover{color:var(--fg);transform:translateY(-1px)}
.mode-chip.on{background:var(--panel3);color:var(--fg);border-color:var(--border2)}
.send{width:30px;height:30px;flex:none;background:#faf9f7;color:#1c1b1a;border:none;border-radius:999px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:transform .12s ease,filter .15s,box-shadow .2s}
.send:hover{filter:brightness(.88);transform:translateY(-1px);box-shadow:0 2px 10px rgba(244,243,241,.18)}
.send:active{transform:scale(.9)}
.send svg{width:15px;height:15px}
.composer-hint{font-size:10.5px;color:#55524e;text-align:center}

/* scrollbars */
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:#3a3835;border-radius:99px;border:2px solid var(--bg)}
::-webkit-scrollbar-track{background:transparent}