:root {
  --bg: #0b1628;
  --card: #152238;
  --accent: #0082c9;
  --accent-hover: #006aa3;
  --text: #eef3fa;
  --muted: #8fa3bf;
  --error: #ff8a80;
  --ok: #6fcf97;
  --warn: #f2c94c;
  --border: #2a4060;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: radial-gradient(ellipse at top, #1a3050 0%, var(--bg) 55%);
  color: var(--text);
}

.card {
  width: 100%;
  max-width: 440px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

h1 { margin: 0 0 8px; font-size: 1.75rem; }
h2 { margin: 0 0 12px; }
.muted { color: var(--muted); font-size: 0.92rem; }
.hint { display: block; font-size: 0.8rem; color: var(--muted); margin-top: 4px; }
.req { color: var(--accent); }
.hidden { display: none !important; }
.error { color: var(--error); font-size: 0.9rem; }

label {
  display: block;
  margin-bottom: 16px;
  font-size: 0.88rem;
  font-weight: 500;
}

input {
  display: block;
  width: 100%;
  margin-top: 6px;
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
}

input:focus {
  outline: 2px solid var(--accent);
  border-color: transparent;
}

button, .button {
  display: block;
  width: 100%;
  padding: 13px;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
}

button:hover, .button:hover { background: var(--accent-hover); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.banner {
  padding: 12px 14px;
  border-radius: 10px;
  margin-bottom: 20px;
  font-size: 0.9rem;
}
.banner.warn {
  background: rgba(242, 201, 76, 0.12);
  border: 1px solid var(--warn);
  color: var(--warn);
}

.success { text-align: center; padding: 12px 0; }
.success .button { margin-top: 16px; }

.footer {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer a { color: var(--accent); }