/* 푸른국어학원 메인 스타일시트 */

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-light: linear-gradient(135deg, #f0f4ff 0%, #e8f0fe 50%, #fff8e1 100%);
}

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

body {
    font-family: 'Noto Sans KR', 'Malgun Gothic', sans-serif;
    background: var(--gradient-light);
    color: #333;
    line-height: 1.6;
    min-height: 100vh;
}

/* 상단 바 */
.top-bar {
    font-size: 0.9rem;
}

.top-bar a {
    transition: opacity 0.3s;
}

.top-bar a:hover {
    opacity: 0.8;
}

/* 메인 헤더 */
.main-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.95) !important;
}

.logo h1 {
    font-size: 1.8rem;
    transition: transform 0.3s;
}

.logo:hover h1 {
    transform: scale(1.05);
}

/* 네비게이션 */
.navbar-nav .nav-link {
    color: #333;
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: all 0.3s;
    position: relative;
}

.navbar-nav .nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s;
}

.navbar-nav .nav-link:hover::after,
.navbar-nav .nav-link.active::after {
    width: 80%;
}

.navbar-nav .nav-link:hover {
    color: var(--primary-color);
}

.dropdown-menu {
    border: none;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    border-radius: 10px;
    margin-top: 0.5rem;
}

.dropdown-item {
    padding: 0.7rem 1.5rem;
    transition: all 0.3s;
}

.dropdown-item:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateX(5px);
}

/* 메인 콘텐츠 */
.main-content {
    min-height: calc(100vh - 400px);
    padding: 2rem 0;
}

/* 히어로 섹션 */
.hero-section {
    background: var(--gradient-primary);
    color: white;
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.1)" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,112C672,96,768,96,864,112C960,128,1056,160,1152,165.3C1248,171,1344,149,1392,138.7L1440,128L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>');
    background-repeat: no-repeat;
    background-position: bottom;
    background-size: cover;
}

.hero-section h1 {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.hero-section p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
}

.hero-section .btn {
    font-size: 1.1rem;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    position: relative;
    z-index: 1;
}

/* 카드 */
.card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    overflow: hidden;
    background: white;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.card-header {
    background: var(--gradient-primary);
    color: white;
    font-weight: 600;
    border: none;
    padding: 1rem 1.5rem;
}

.card-body {
    padding: 1.5rem;
}

.card-img-top {
    height: 200px;
    object-fit: cover;
}

/* 섹션 */
.section {
    padding: 4rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* 특징 아이템 */
.feature-item {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: all 0.3s;
    height: 100%;
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.feature-item .icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: white;
}

.feature-item h4 {
    font-weight: 600;
    margin-bottom: 1rem;
}

/* 버튼 */
.btn {
    border-radius: 10px;
    padding: 0.6rem 1.5rem;
    font-weight: 500;
    transition: all 0.3s;
}

.btn-primary {
    background: var(--gradient-primary);
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-outline-primary {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline-primary:hover {
    background: var(--gradient-primary);
    border-color: transparent;
}

/* 푸터 */
.footer {
    background: #2c3e50;
    margin-top: auto;
}

.footer h5 {
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
    display: inline-block;
}

.footer a {
    transition: all 0.3s;
}

.footer a:hover {
    color: var(--primary-color) !important;
    transform: translateX(5px);
}

.social-links a {
    display: inline-block;
    transition: transform 0.3s;
}

.social-links a:hover {
    transform: translateY(-5px);
}

/* Back to Top 버튼 */
.btn-floating {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    transition: all 0.3s;
}

.btn-floating:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.4);
}

/* 테이블 */
.table {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.table thead {
    background: var(--gradient-primary);
    color: white;
}

.table tbody tr {
    transition: background 0.3s;
}

.table tbody tr:hover {
    background: #f8f9fa;
}

/* 배지 */
.badge {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 500;
}

/* 로딩 스피너 */
.spinner-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
}

/* 반응형 */
@media (max-width: 768px) {
    .hero-section h1 {
        font-size: 2rem;
    }
    
    .hero-section p {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .logo h1 {
        font-size: 1.3rem;
    }
    
    .btn-floating {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

/* 애니메이션 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-left {
    animation: slideInLeft 0.6s ease-out;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in-right {
    animation: slideInRight 0.6s ease-out;
}

/* 유틸리티 클래스 */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-lg {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15) !important;
}

.rounded-lg {
    border-radius: 15px !important;
}

/* 이미지 플레이스홀더 */
.img-placeholder {
    background: linear-gradient(135deg, #e0e7ff 0%, #fce7f3 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #9ca3af;
    font-size: 3rem;
}