* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: #1f2937;
  background: #f3f4f6;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 10px 15px -3px rgba(0, 0, 0, 0.05);
  padding: 40px 32px;
  text-align: center;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  margin: 0 auto 24px;
  background: #005151;
  color: #ffffff;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 81, 81, 0.2);
}

.login-card h1 {
  margin: 0 0 8px;
  font-size: 24px;
  font-weight: 600;
  color: #111827;
  letter-spacing: -0.01em;
}

.login-card p {
  margin: 0 0 28px;
  font-size: 15px;
  color: #6b7280;
}

.login-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 12px 20px;
  background: #e5ff11;
  color: #005151;
  border: none;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: background 120ms ease, transform 120ms ease;
}

.login-button:hover {
  background: #d9f20a;
  transform: translateY(-1px);
}

.login-button i {
  font-size: 18px;
  flex-shrink: 0;
}

.error {
  margin-top: 16px;
  padding: 10px 12px;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 6px;
  color: #991b1b;
  font-size: 13px;
  line-height: 1.4;
}

.footer {
  margin-top: 20px;
  font-size: 13px;
  color: #9ca3af;
}

@media (max-width: 480px) {
  body {
    padding: 16px;
    background: #ffffff;
  }

  .login-card {
    border: none;
    box-shadow: none;
    padding: 24px 16px;
  }
}