:root {
  --bg: #0b1220;
  --panel: #111a2e;
  --border: #22304d;
  --text: #e6edf7;
  --text-dim: #8a98b3;
  --cyan: #22c3e6;
  --red: #ef4a5f;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, sans-serif;
}
.login-card {
  width: 100%;
  max-width: 360px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
}
.logo { font-size: 22px; font-weight: 800; letter-spacing: 0.04em; }
.logo .shark { color: var(--cyan); }
.sub { color: var(--text-dim); font-size: 13px; margin: 6px 0 20px; }
label { display: block; font-size: 12px; color: var(--text-dim); margin-bottom: 6px; }
input {
  width: 100%;
  padding: 12px;
  font-size: 16px; /* 16px stops iOS zooming into the field */
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
}
button {
  width: 100%;
  margin-top: 16px;
  padding: 12px;
  font-size: 16px;
  font-weight: 700;
  border: none;
  border-radius: 8px;
  background: var(--cyan);
  color: #04121a;
  cursor: pointer;
}
button:disabled { opacity: 0.6; }
.error { color: var(--red); font-size: 13px; min-height: 18px; margin-top: 12px; }