:root{color-scheme:dark;--bg:#071322;--panel:#0c2138;--line:#1a3e59;--ink:#eaf7ff;--muted:#91acc4;--cyan:#36d5ff;--green:#39dfad;--red:#ff6474}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 90% 0%,#0c3145 0,transparent 35%),var(--bg);color:var(--ink);font:14px/1.5 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}a{color:#90e9ff;text-decoration:none}button,input{font:inherit}button{cursor:pointer;border:1px solid #2b617c;border-radius:10px;padding:8px 13px;background:#11344d;color:var(--ink)}button:hover,a:hover{filter:brightness(1.18)}.shell{display:grid;grid-template-columns:250px minmax(0,1fr);min-height:100vh}.sidebar{position:sticky;top:12px;height:calc(100vh - 24px);margin:12px;padding:17px;background:linear-gradient(180deg,#0d2940,#09172a 70%);border:1px solid var(--line);border-radius:18px;display:flex;flex-direction:column}.brand{display:flex;gap:12px;align-items:center;padding:2px 3px 17px;border-bottom:1px solid 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p{color:var(--muted)}.login-card label{display:block;margin:16px 0}.login-card input{display:block;width:100%;margin-top:5px;padding:11px;border:1px solid var(--line);border-radius:9px;background:#08192d;color:var(--ink)}.login-card button{width:100%;background:#16bfe5;color:#071322;font-weight:700}.alert{padding:10px;border:1px solid #a94e62;border-radius:8px;color:#ffd0d5}@media(max-width:900px){.shell{grid-template-columns:1fr}.sidebar{position:static;height:auto;margin:8px}.sidebar nav{grid-template-columns:repeat(4,auto);overflow:auto}.sidebar-version{display:none}.columns{grid-template-columns:1fr}.workspace main{padding:18px}.topbar{padding:0 18px}}@media(max-width:540px){.welcome{align-items:start;flex-direction:column}.file-list>div{flex-wrap:wrap}.metrics{grid-template-columns:repeat(2,1fr)}.sidebar nav{grid-template-columns:repeat(2,1fr)}}