:root{color-scheme:dark;--bg:#080d19;--card:#111a2c;--line:#26344f;--ink:#f3f7ff;--muted:#aab5ca;--accent:#71e4bb;--danger:#ff9b9b;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at 15% 10%,rgba(84,113,255,.2),transparent 33%),radial-gradient(circle at 90% 85%,rgba(113,228,187,.12),transparent 30%),var(--bg);color:var(--ink)}.login-shell{min-height:100vh;display:grid;place-items:center;padding:24px}.login-card{width:min(100%,410px);padding:36px;border:1px solid var(--line);border-radius:28px;background:rgba(17,26,44,.94);box-shadow:0 30px 90px rgba(0,0,0,.42)}.brand-mark{width:54px;height:54px;display:grid;place-items:center;border-radius:17px;background:linear-gradient(135deg,var(--accent),#8ba6ff);color:#071018;font-size:27px;box-shadow:0 12px 30px rgba(113,228,187,.2)}.eyebrow{margin:24px 0 8px;color:var(--accent);font-size:12px;font-weight:800;letter-spacing:.15em}h1{margin:0;font-size:30px;line-height:1.15;letter-spacing:-.03em}.intro{margin:12px 0 26px;color:var(--muted);line-height:1.55}.error-message{margin:0 0 18px;padding:12px 14px;border:1px solid rgba(255,155,155,.35);border-radius:12px;background:rgba(255,155,155,.08);color:var(--danger);font-size:14px}.error-message.hidden{display:none}form{display:grid;gap:17px}label{display:grid;gap:8px}label span{font-size:13px;font-weight:750;color:#dce5f7}input{width:100%;border:1px solid var(--line);border-radius:13px;background:#0b1322;color:var(--ink);font:inherit;padding:14px 15px;outline:none;transition:border-color .15s,box-shadow .15s}input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(113,228,187,.14)}button{margin-top:5px;border:0;border-radius:14px;padding:15px 18px;display:flex;align-items:center;justify-content:space-between;background:linear-gradient(135deg,var(--accent),#8ba6ff);color:#071018;font:inherit;font-weight:850;cursor:pointer}button:hover{filter:brightness(1.06)}button:focus-visible{outline:3px solid #fff;outline-offset:3px}.session-note{margin:22px 0 0;text-align:center;color:var(--muted);font-size:12px}.session-note span{color:var(--accent);font-size:9px}@media(max-width:480px){.login-shell{padding:14px}.login-card{padding:28px 22px;border-radius:22px}h1{font-size:27px}}