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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f5f5;
}

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

a {
    text-decoration: none;
    color: #667eea;
    transition: color 0.3s;
}

a:hover {
    color: #764ba2;
}

h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1rem;
}

.btn {
    display: inline-block;
    padding: 10px 25px;
    border-radius: 8px;
    border: none;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-secondary {
    background: #f0f0f0;
    color: #333;
}

.btn-secondary:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.card {
    background: #fff;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.alert {
    padding: 12px 15px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 15px;
}

.alert-success {
    background: #e6f7ff;
    border: 1px solid #bae7ff;
    color: #0052cc;
}

.alert-danger {
    background: #fff1f0;
    border: 1px solid #ffccc7;
    color: #ff4d4f;
}

.alert-warning {
    background: #fff7e6;
    border: 1px solid #ffe58f;
    color: #fa8c16;
}

.alert-info {
    background: #e6f7ff;
    border: 1px solid #91d5ff;
    color: #0052cc;
}

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }

.py-1 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-2 { padding-top: 1rem; padding-bottom: 1rem; }
.py-3 { padding-top: 1.5rem; padding-bottom: 1.5rem; }

.d-none { display: none; }

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .btn {
        width: 100%;
    }
}