@keyframes blink {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

:root {
    --primary-color: #00A6A6;
    --primary-dark: #008080;
    --secondary-color: #F8F9FA;
    --text-color: #2C3E50;
    --error-color: #E74C3C;
    --success-color: #2ECC71;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #F0F2F5;
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.card {
    background: white;
    border-radius: 15px;
    box-shadow: var(--shadow);
    padding: 2rem;
    margin: 1rem 0;
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    border: none;
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-control {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 2px solid #E2E8F0;
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 166, 166, 0.1);
}

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
}

.alert-error {
    background: #FEE2E2;
    border: 1px solid #FCA5A5;
    color: var(--error-color);
}

.alert-success {
    background: #DCFCE7;
    border: 1px solid #86EFAC;
    color: var(--success-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .btn {
        width: 100%;
        text-align: center;
    }
}