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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    padding: 48px 40px;
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.logo {
    height: 48px;
    margin-bottom: 24px;
}

.login-header h1 {
    font-size: 24px;
    font-weight: 600;
    color: #1a202c;
    margin-bottom: 8px;
}

.subtitle {
    color: #718096;
    font-size: 14px;
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: #4a5568;
}

.form-group input {
    padding: 14px 16px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    font-size: 15px;
    background: #fafbfc;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: #6366f1;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    background: white;
}

.form-group input::placeholder {
    color: #a0aec0;
}

.error-message {
    background: #fee2e2;
    color: #991b1b;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    border: 1px solid #fecaca;
}

.login-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: #6366f1;
    color: white;
    border: none;
    padding: 14px 24px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
}

.login-button:hover:not(:disabled) {
    background: #4f46e5;
}

.login-button:active:not(:disabled) {
    transform: scale(0.98);
}

.login-button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.button-spinner {
    display: inline-flex;
    align-items: center;
}

.spinner {
    width: 18px;
    height: 18px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.login-footer {
    text-align: center;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid #e2e8f0;
}

.login-footer p {
    color: #a0aec0;
    font-size: 12px;
}

/* Responsive adjustments */
@media (max-width: 480px) {
    .login-card {
        padding: 32px 24px;
    }

    .login-header h1 {
        font-size: 20px;
    }
}