body {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh;
  background: var(--bg);
  padding: 20px;
}
body::before {
  content: '';
  position: fixed; inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(232,73,29,0.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(247,164,76,0.06) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(232,73,29,0.04) 0%, transparent 50%);
  pointer-events: none;
}

.login-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 48px 40px 40px;
  width: 100%; max-width: 400px;
  box-shadow: 0 4px 24px rgba(0,0,0,0.06), 0 1px 4px rgba(0,0,0,0.04);
  position: relative;
  animation: cardIn 0.4s ease-out;
}
@keyframes cardIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.login-logo {
  width: 48px; height: 48px;
  background: var(--accent);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 20px;
  margin: 0 auto 20px;
}
.login-title {
  text-align: center; font-size: 22px; font-weight: 600;
  color: var(--text-primary); margin-bottom: 6px;
}
.login-subtitle {
  text-align: center; font-size: 14px;
  color: var(--text-secondary); margin-bottom: 32px;
}

.form-group { margin-bottom: 20px; }
.form-label {
  display: block; font-size: 13px; font-weight: 500;
  color: var(--text-secondary); margin-bottom: 6px;
}
.form-input {
  width: 100%; padding: 11px 14px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 15px; color: var(--text-primary);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
  font-family: inherit;
}
.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-light);
  background: #fff;
}
.form-input::placeholder { color: var(--text-tertiary); }

.login-btn {
  width: 100%; padding: 12px;
  background: var(--accent);
  color: #fff; border: none;
  border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 500;
  cursor: pointer;
  transition: background var(--transition), transform 0.1s;
  font-family: inherit;
  margin-top: 8px;
}
.login-btn:hover { background: var(--accent-hover); }
.login-btn:active { transform: scale(0.98); }

.error-msg {
  color: var(--error);
  text-align: center;
  margin-top: 16px;
  font-size: 13px;
  min-height: 20px;
  animation: shake 0.3s ease-out;
}
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}

.login-footer {
  text-align: center; margin-top: 24px;
  font-size: 12px; color: var(--text-tertiary);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  body { padding: 16px; }
  .login-card { padding: 32px 24px 28px; }
  .login-logo { width: 40px; height: 40px; font-size: 18px; margin-bottom: 16px; }
  .login-title { font-size: 20px; }
  .login-subtitle { font-size: 13px; margin-bottom: 24px; }
  .form-group { margin-bottom: 16px; }
  .form-input { padding: 10px 12px; font-size: 14px; }
  .login-btn { padding: 11px; font-size: 14px; }
}
@media (max-width: 400px) {
  body { padding: 12px; }
  .login-card { padding: 24px 18px 20px; }
  .login-logo { width: 36px; height: 36px; font-size: 16px; }
  .login-title { font-size: 18px; }
  .login-subtitle { font-size: 12px; margin-bottom: 20px; }
  .form-input { padding: 9px 10px; font-size: 13px; }
  .login-btn { padding: 10px; font-size: 13px; }
  .error-msg { font-size: 12px; }
}