/* 메인 스타일 */

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Helvetica Neue', Arial, sans-serif;
    background: #f5f7fa;
    color: #2c3e50;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem;
}

/* 네비게이션 */
.navbar {
    background: white;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: #e74c3c;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-menu {
    display: flex;
    gap: 1rem;
}

.navbar-item {
    text-decoration: none;
    color: #7f8c8d;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-item:hover {
    background: #ecf0f1;
    color: #2c3e50;
}

/* Flash 메시지 */
.flash-messages {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 2000;
    max-width: 400px;
}

.flash {
    padding: 1rem 1.5rem;
    margin-bottom: 0.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    justify-content: space-between;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.flash-success {
    background: #2ecc71;
    color: white;
}

.flash-error {
    background: #e74c3c;
    color: white;
}

.flash-warning {
    background: #f39c12;
    color: white;
}

.flash-info {
    background: #3498db;
    color: white;
}

.flash-close {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    margin-left: 1rem;
    padding: 0;
    line-height: 1;
}

/* 푸터 */
.footer {
    background: white;
    padding: 2rem 0;
    margin-top: 4rem;
    border-top: 1px solid #ecf0f1;
    text-align: center;
    color: #95a5a6;
}

/* 버튼 */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary {
    background: #e74c3c;
    color: white;
}

.btn-primary:hover {
    background: #c0392b;
    transform: translateY(-2px);
}

.btn-secondary {
    background: #ecf0f1;
    color: #2c3e50;
}

.btn-secondary:hover {
    background: #bdc3c7;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #2c3e50;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #ecf0f1;
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #3498db;
}

/* 반응형 */
@media (max-width: 767px) {
    .navbar-menu {
        gap: 0.5rem;
    }
    
    .navbar-item {
        padding: 0.5rem;
        font-size: 0.9rem;
    }
    
    .navbar-item span {
        display: none;
    }
    
    .flash-messages {
        right: 10px;
        left: 10px;
        max-width: none;
    }
}