:root {
  color-scheme: dark;
  --bg: #07111f;
  --card: rgba(9, 18, 34, .82);
  --border: rgba(255,255,255,.16);
  --text: #eef6ff;
  --muted: #9fb4c8;
  --accent: #4cc9f0;
  --accent2: #f7b801;
}
* { box-sizing: border-box; }
html, body { min-height: 100%; margin: 0; font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, sans-serif; color: var(--text); background: radial-gradient(circle at 20% 15%, rgba(76,201,240,.28), transparent 32%), radial-gradient(circle at 80% 10%, rgba(247,184,1,.18), transparent 30%), linear-gradient(135deg, #06101f, #10192c 54%, #060a12); }
body::before { content: ''; position: fixed; inset: 0; background-image: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px); background-size: 42px 42px; mask-image: linear-gradient(to bottom, rgba(0,0,0,.65), transparent 80%); pointer-events: none; }
.login-shell { min-height: 100vh; display: grid; place-items: center; padding: 22px; }
.login-card { width: min(430px, 100%); border: 1px solid var(--border); border-radius: 28px; padding: 24px; background: var(--card); backdrop-filter: blur(18px); box-shadow: 0 28px 70px rgba(0,0,0,.45); }
.banner { margin: -4px -4px 16px; padding: 18px 16px; border-radius: 22px; text-align: center; font-size: clamp(24px, 7vw, 38px); line-height: 1; font-weight: 1000; letter-spacing: -.04em; color: #06101f; background: linear-gradient(135deg, var(--accent), #80ed99 52%, var(--accent2)); box-shadow: 0 12px 32px rgba(76,201,240,.16); }
.subtitle, .hint { color: var(--muted); text-align: center; line-height: 1.4; }
form { display: grid; gap: 14px; margin-top: 18px; }
label { display: grid; gap: 7px; color: var(--muted); font-size: 13px; font-weight: 800; }
input { width: 100%; border: 1px solid var(--border); border-radius: 14px; padding: 13px 14px; color: var(--text); background: rgba(0,0,0,.24); outline: none; font-size: 16px; }
input:focus { border-color: var(--accent); box-shadow: 0 0 0 4px rgba(76,201,240,.14); }
button { margin-top: 6px; border: 0; border-radius: 999px; padding: 13px 16px; font-weight: 1000; color: white; background: linear-gradient(135deg, #4cc9f0, #4361ee); cursor: pointer; box-shadow: 0 14px 34px rgba(67,97,238,.28); }
button:hover { filter: brightness(1.08); }
.error { border: 1px solid rgba(255,77,109,.36); border-radius: 14px; padding: 10px; color: #ff8fa3; background: rgba(255,77,109,.12); }
.hint { margin-bottom: 0; font-size: 12px; }