:root {
  --c-bg: #f4f6fa;
  --c-surface: #ffffff;
  --c-border: #e2e8f0;
  --c-primary: #1e3a5f;
  --c-primary-2: #2c5282;
  --c-accent: #3182ce;
  --c-text: #1a202c;
  --c-text-2: #4a5568;
  --c-text-3: #718096;
  --c-danger: #c53030;
  --c-danger-bg: #fdecec;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--c-bg);
  color: var(--c-text);
  font-size: 14px;
  line-height: 1.45;
}
.login-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}
.login-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: 14px;
  padding: 32px;
  width: 100%;
  max-width: 380px;
  box-shadow: 0 10px 30px rgba(15,23,42,.08);
}
.login-card h1 {
  margin: 0 0 4px;
  font-size: 22px;
  color: var(--c-primary);
}
.login-card p.subtitle {
  margin: 0 0 24px;
  color: var(--c-text-2);
  font-size: 13px;
}
.field { margin-bottom: 14px; }
.field label {
  display: block;
  margin-bottom: 6px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--c-text-2);
}
.field input {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--c-border);
  border-radius: 8px;
  font-size: 14px;
  font-family: inherit;
}
.field input:focus {
  outline: none;
  border-color: var(--c-accent);
}
.btn {
  width: 100%;
  padding: 11px;
  background: var(--c-primary);
  color: white;
  border: 0;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s;
}
.btn:hover { background: var(--c-primary-2); }
.btn:disabled { opacity: .6; cursor: not-allowed; }
.error {
  background: var(--c-danger-bg);
  color: var(--c-danger);
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 14px;
}
.hidden { display: none; }