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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

/* 네비게이션 바 스타일 */
.navbar {
    background: white;
    padding: 1rem 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar h1 {
    color: #333;
    font-size: 1.5rem;
}
.navbar2 {
    background: #111;
    padding: 1rem 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar2 h1 {
    color: #f0dff3;
    font-size: 1.5rem;
}

.navbar-buttons {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    font-size: 0.9rem;
    transition: transform 0.2s ease;
}

.nav-btn:hover {
    transform: translateY(-1px);
}

.nav-btn.active {
    background: #28a745;
}

.nav-btn.secondary {
    background: #6c757d;
}

.logout-btn {
    background: #dc3545;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    font-size: 0.9rem;
    transition: transform 0.2s ease;
}

.logout-btn:hover {
    transform: translateY(-1px);
}

/* 컨테이너 스타일 */
.container_user {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
}

/* 버튼 스타일 */
.btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    transition: transform 0.2s ease;
    text-decoration: none;
    display: inline-block;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn.success {
    background: #28a745;
}

.btn.danger {
    background: #dc3545;
}

.btn.secondary {
    background: #6c757d;
}

/* 카드 스타일 */
.card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

/* 알림 스타일 */
.alert {
    padding: 0.75rem;
    border-radius: 5px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.alert-error {
    background-color: #fee;
    color: #c33;
    border: 1px solid #fcc;
}

.alert-success {
    background-color: #efe;
    color: #3c3;
    border: 1px solid #cfc;
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .navbar {
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
    }

    .container {
        padding: 0 1rem;
    }
}