*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --accent: #6366F1;
  --accent-hover: #4F46E5;
  --border: rgba(255, 255, 255, 0.1);
  --input-bg: rgba(255, 255, 255, 0.05);
  --input-border: rgba(255, 255, 255, 0.12);
  --input-focus: rgba(99, 102, 241, 0.5);
  --red: #F87171;
  --red-bg: rgba(239, 68, 68, 0.1);
  --red-border: rgba(239, 68, 68, 0.3);
  --radius: 8px;
}

body {
  min-height: 100vh;
  background: #0f1117;
  color: #fff;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  -webkit-font-smoothing: antialiased;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.hidden { display: none !important; }

.login-wrap {
  width: 100%;
  max-width: 400px;
}

.login-card {
  background: #1a1d27;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 2.5rem 2rem;
}

.login-logo {
  text-align: center;
  margin-bottom: 1.75rem;
}

.brand {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.03em;
}

.login-title {
  font-size: 1rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.65);
  text-align: center;
  margin-bottom: 1.75rem;
}

.login-error {
  background: var(--red-bg);
  border: 1px solid var(--red-border);
  color: var(--red);
  font-size: 0.8125rem;
  padding: 0.625rem 0.875rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.field {
  margin-bottom: 1rem;
}

.field label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 0.375rem;
}

.field input {
  width: 100%;
  padding: 0.5625rem 0.75rem;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  color: #fff;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.field input::placeholder { color: rgba(255, 255, 255, 0.25); }

.field input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--input-focus);
}

.btn-primary {
  width: 100%;
  padding: 0.625rem 1rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 0.5rem;
  transition: background 0.15s;
}

.btn-primary:hover:not(:disabled) { background: var(--accent-hover); }
.btn-primary:disabled { opacity: 0.55; cursor: not-allowed; }

@media (max-width: 440px) {
  .login-card {
    padding: 2rem 1.25rem;
  }
}