:root{color-scheme:dark;--bg:#061421;--card:#10344e;--line:rgba(146,218,247,.35);--cyan:#55e7fa;--text:#f3fbff;--muted:#a9c8d8;--danger:#ff9eaa}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at 80% 10%,rgba(38,153,231,.28),transparent 36%),linear-gradient(145deg,#0b2841,#061421 65%);color:var(--text);font-family:Segoe UI,Manrope,sans-serif}.login-shell{min-height:100vh;display:grid;place-items:center;padding:24px}.login-card{width:min(420px,100%);padding:34px;border:1px solid var(--line);border-radius:22px;background:linear-gradient(145deg,rgba(18,61,89,.96),rgba(7,29,46,.96));box-shadow:0 24px 70px rgba(0,0,0,.28)}.brand-mark{width:52px;height:52px;display:grid;place-items:center;border:1px solid var(--cyan);border-radius:16px;color:var(--cyan);font-size:31px;box-shadow:0 0 26px rgba(85,231,250,.2)}.eyebrow{margin:24px 0 8px;color:#8dd7f5;font-size:12px;font-weight:800;letter-spacing:.16em}.login-card h1{margin:0;font-family:Georgia,serif;font-size:30px}.muted{margin:9px 0 28px;color:var(--muted)}form{display:grid;gap:16px}label{display:grid;gap:8px;color:#c3dce8;font-size:14px;font-weight:700}input{height:46px;padding:0 13px;border:1px solid var(--line);border-radius:10px;background:#09243a;color:var(--text);font-size:16px;outline:none}input:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(85,231,250,.12)}button{height:46px;border:0;border-radius:10px;background:linear-gradient(110deg,#3198ff,#52e4f4);color:#052033;font-size:15px;font-weight:800;cursor:pointer}button:disabled{opacity:.55;cursor:wait}button span{float:right;font-size:20px;line-height:16px}.error{margin:0;padding:10px 12px;border:1px solid rgba(255,158,170,.5);border-radius:9px;background:rgba(255,100,120,.12);color:var(--danger);font-size:13px}.login-card small{display:block;margin-top:20px;color:#86adbf;font-size:12px;line-height:1.5}