:root { --bg:#0f121b; --bg2:#161a26; --card:#1c2232; --linha:#2c3550; --txt:#eef1f8; --mudo:#aab3c8; --foco:#ffd166; --erro:#ff7b70; --ouro:#e0c040; }
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body { background: var(--bg); color: var(--txt); font: 16px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  min-height: 100dvh; display: flex; align-items: center; justify-content: center; padding: 16px; }
main { width: 100%; max-width: 380px; background: var(--card); border: 1px solid var(--linha); border-top: 5px solid var(--ouro); border-radius: 12px; padding: 24px 20px; }
h1 { margin: 0 0 4px; font-size: 24px; letter-spacing: .2px; }
.sub { margin: 0 0 12px; color: var(--mudo); font-size: 14px; }
label { display: block; font-weight: 600; margin: 14px 0 6px; }
input[type="text"], input[type="password"] { width: 100%; min-height: 44px; font: inherit; color: var(--txt); background: var(--bg2); border: 1px solid #5d6b92; border-radius: 8px; padding: 8px 12px; }
input:focus-visible, button:focus-visible { outline: 3px solid var(--foco); outline-offset: 2px; }
button { width: 100%; min-height: 46px; margin-top: 22px; font: inherit; font-weight: 700; color: #111; background: var(--ouro); border: 0; border-radius: 8px; cursor: pointer; }
button:hover { background: #f0d255; }
.erro { margin: 8px 0 0; padding: 10px 12px; border: 1px solid var(--erro); border-radius: 8px; background: #3a1a1a; color: #ffd3ce; font-size: 14px; }
.erro:empty { display: none; }