:root{--bg:#f4f6fb;--fg:#1d2433;--muted:#5b6475;--card:#fff;--line:#dde2ec;--brand:#2563eb;--brand-fg:#fff;--bar:#1e293b;--bar-fg:#e2e8f0;--danger:#b42318;--danger-bg:#fdecea}
@media (prefers-color-scheme:dark){:root{--bg:#0f1420;--fg:#e5e9f2;--muted:#9aa4b8;--card:#171d2b;--line:#2a3347;--brand:#3b82f6;--bar:#0b1020;--bar-fg:#cbd5e1;--danger:#ffb4ab;--danger-bg:#3b1716}}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--fg)}
.center-page{display:flex;align-items:center;justify-content:center;min-height:100%;padding:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:28px;box-shadow:0 8px 30px rgba(0,0,0,.06);text-align:left}
.login-card{width:100%;max-width:400px}
h1{margin:0 0 4px;font-size:26px}
.muted{color:var(--muted)}.small{font-size:13px}
label{display:block;margin:14px 0 6px;font-weight:600}
input{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:9px;background:transparent;color:var(--fg);font:inherit}
input:focus{outline:2px solid var(--brand);outline-offset:1px}
.btn{display:inline-flex;align-items:center;gap:6px;padding:7px 13px;border-radius:8px;border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.08);color:inherit;text-decoration:none;font:inherit;font-size:14px;cursor:pointer;white-space:nowrap}
.btn.primary{background:var(--brand);color:var(--brand-fg);border-color:var(--brand)}
.btn.ghost{background:transparent}
.btn.wide{width:100%;justify-content:center;margin-top:20px;padding:12px}
.alert{background:var(--danger-bg);color:var(--danger);padding:10px 12px;border-radius:9px;margin:14px 0}
.spinner{width:34px;height:34px;border:3px solid var(--line);border-top-color:var(--brand);border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 12px}
@keyframes spin{to{transform:rotate(360deg)}}
/* portal */
.portal{display:flex;flex-direction:column;height:100vh;overflow:hidden}
.toolbar{position:relative;z-index:5;display:flex;align-items:center;gap:10px;height:38px;padding:0 6px 0 10px;background:var(--bar);color:var(--bar-fg);flex:0 0 auto}
.toolbar .brand{display:inline-flex;color:#60a5fa}
.toolbar svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.toolbar .who{flex:1;min-width:0;display:flex;align-items:baseline;gap:8px;overflow:hidden;white-space:nowrap;font-size:13px}
.toolbar .who b{font-weight:600;letter-spacing:.02em}
.toolbar .who .name{opacity:.7;overflow:hidden;text-overflow:ellipsis}
.toolbar nav{display:flex;align-items:center;gap:2px}
.toolbar .sep{width:1px;height:20px;background:rgba(255,255,255,.15);margin:0 4px}
.ibtn{position:relative;display:inline-flex;align-items:center;justify-content:center;width:32px;height:30px;border-radius:7px;border:0;background:transparent;color:var(--bar-fg);cursor:pointer;text-decoration:none;padding:0}
.ibtn:hover,.ibtn:focus-visible{background:rgba(255,255,255,.12);outline:none}
.ibtn:focus-visible{box-shadow:0 0 0 2px #60a5fa}
.ibtn.primary{background:var(--brand);color:#fff}
.ibtn.primary:hover{filter:brightness(1.1)}
.ibtn[data-tip]:hover::after,.ibtn[data-tip]:focus-visible::after{content:attr(data-tip);position:absolute;top:calc(100% + 7px);right:0;white-space:nowrap;background:#0b1020;color:#f1f5f9;font-size:12.5px;line-height:1.3;padding:6px 9px;border-radius:6px;box-shadow:0 6px 18px rgba(0,0,0,.25);pointer-events:none;z-index:20}
.ibtn[data-tip]:hover::before,.ibtn[data-tip]:focus-visible::before{content:"";position:absolute;top:calc(100% + 2px);right:11px;border:5px solid transparent;border-bottom-color:#0b1020;border-top:0;pointer-events:none;z-index:20}
#ide{flex:1;width:100%;border:0;display:block}
.loading{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--muted)}
.loading.error p{color:var(--danger)}
dialog{border:1px solid var(--line);border-radius:14px;background:var(--card);color:var(--fg);max-width:560px;width:calc(100% - 32px)}
dialog::backdrop{background:rgba(0,0,0,.4)}
code{background:rgba(127,127,127,.15);padding:1px 5px;border-radius:5px}
@media (max-width:520px){.toolbar .who .name{display:none}}