:root { --ink: #0f172a; --muted: #64748b; --accent: #15803d; --line: #e2e8f0; }
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body { display: grid; place-items: center; padding: 16px; background: linear-gradient(160deg, #0f172a 0%, #1e293b 55%, #14532d 100%);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; color: var(--ink); }
.card { width: 100%; max-width: 380px; background: #fff; border-radius: 14px; padding: 28px 26px 26px; box-shadow: 0 24px 60px rgba(0,0,0,0.35); }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
h1 { font-size: 22px; margin: 18px 0 4px; }
.sub { color: var(--muted); margin: 0 0 16px; font-size: 14px; }
label { display: block; font-size: 13px; color: #334155; margin: 12px 0 0; }
input { display: block; width: 100%; margin-top: 4px; padding: 9px 10px; border: 1px solid #cbd5e1; border-radius: 8px; font: inherit; }
input:focus { outline: 2px solid #86efac; border-color: var(--accent); }
button { margin-top: 18px; width: 100%; padding: 10px; border: none; border-radius: 8px; background: var(--accent); color: #fff; font: inherit; font-weight: 600; cursor: pointer; }
button:hover { filter: brightness(1.08); }
.msg { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; border-radius: 8px; padding: 8px 10px; font-size: 13px; margin: 0 0 6px; }