/* ========================================
   하나아트갤러리 공통 스타일
   ======================================== */

/* CSS Variables (디자인 시스템) */
:root {
    /* 색상 팔레트 */
    --primary: #1a1a1a;
    --secondary: #f5f5f5;
    --accent: #d4af37;
    --text-dark: #333;
    --text-light: #666;
    --text-muted: #999;
    --border-color: #ddd;
    --bg-light: #fafafa;

    /* 타이포그래피 */
    --font-korean: 'Noto Sans KR', sans-serif;
    --font-english: 'Montserrat', sans-serif;

    /* 간격 */
    --section-spacing: 50px;
    --card-spacing: 25px;
    --inner-padding: 20px;

    /* 전환 효과 */
    --transition-base: 0.3s ease;
}

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

body {
    font-family: var(--font-korean);
    color: var(--text-dark);
    line-height: 1.7;
    background-color: #fff;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    margin-bottom: 1rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: var(--text-dark);
    transition: var(--transition-base);
}

a:hover {
    color: var(--accent);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ========================================
   Navbar 스타일 (PDF 디자인 기반 - 시각적 개선)
   ======================================== */
.navbar {
    background-color: #fff;
    transition: transform var(--transition-base);
    padding: 0.75rem 0;
    border-bottom: none;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0;
}

.navbar-brand img {
    height: 45px;
    width: auto;
}

.navbar-brand span {
    font-family: var(--font-english);
    font-weight: 300;
    font-size: 0.95rem;
    letter-spacing: 1.5px;
    color: var(--text-dark);
    line-height: 1;
}

/* PDF 스타일: 둥근 테두리 버튼 (pill 모양) - 시각적 개선 */
.navbar-nav {
    gap: 0.5rem;
}

.navbar-nav .nav-item {
    margin: 0;
}

.navbar-nav .nav-link {
    color: var(--text-dark);
    font-weight: 400;
    font-size: 0.875rem;
    padding: 0.5rem 1.5rem;
    border: 1px solid #333;
    border-radius: 50px;
    transition: all 0.2s ease;
    background-color: transparent;
    white-space: nowrap;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    background-color: #333;
    color: #fff;
    border-color: #333;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.navbar-nav .nav-link.text-danger {
    border-color: #dc3545;
    color: #dc3545;
}

.navbar-nav .nav-link.text-danger:hover {
    background-color: #dc3545;
    color: #fff !important;
    border-color: #dc3545;
}

/* ========================================
   Footer 스타일 (PDF 디자인 기반 - 시각적 개선)
   ======================================== */
.footer {
    margin-top: var(--section-spacing);
    background-color: #fafafa;
    border-top: 1px solid #e8e8e8;
    padding: 2.5rem 0 2rem;
}

.footer img {
    height: 70px;
    width: auto;
    margin-bottom: 0.75rem;
}

.footer .text-muted {
    color: #999 !important;
    font-size: 0.8rem;
    margin: 0;
}

.footer h5 {
    color: #333;
    font-weight: 500;
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
    letter-spacing: -0.3px;
}

.footer p {
    margin-bottom: 0.4rem;
    color: #555;
    font-size: 0.85rem;
    line-height: 1.7;
}

.footer strong {
    color: #333;
    font-weight: 600;
    min-width: 60px;
    display: inline-block;
}

.footer a {
    color: #555;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer a:hover {
    color: #000;
}

/* ========================================
   공통 섹션 스타일
   ======================================== */
.section {
    padding: var(--section-spacing) 0;
}

.section-header {
    text-align: center;
    margin-bottom: 2rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary);
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

/* ========================================
   카드 스타일
   ======================================== */
.card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    margin-bottom: var(--card-spacing);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.card-img-top {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.card-body {
    padding: var(--inner-padding);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.card-text {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* ========================================
   버튼 스타일
   ======================================== */
.btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
    color: #fff;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    transition: var(--transition-base);
}

.btn-primary:hover {
    background-color: var(--accent);
    border-color: var(--accent);
}

.btn-accent {
    background-color: var(--accent);
    border-color: var(--accent);
    color: #fff;
    font-weight: 500;
    padding: 0.75rem 1.5rem;
}

.btn-accent:hover {
    background-color: #b8941f;
    border-color: #b8941f;
}

/* ========================================
   갤러리 그리드
   ======================================== */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--card-spacing);
    margin-bottom: 3rem;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-base);
}

.gallery-item:hover {
    transform: scale(1.05);
}

.gallery-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.gallery-item-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
    color: #fff;
    padding: 1rem;
    opacity: 0;
    transition: var(--transition-base);
}

.gallery-item:hover .gallery-item-overlay {
    opacity: 1;
}

/* ========================================
   모달 갤러리 스타일
   ======================================== */
.modal-gallery .modal-content {
    background-color: rgba(0, 0, 0, 0.95);
    border: none;
    border-radius: 0;
}

.modal-gallery .modal-body {
    padding: 0;
    position: relative;
}

.modal-gallery .modal-gallery-img {
    width: 100%;
    max-height: 80vh;
    object-fit: contain;
}

.modal-gallery .carousel-control-prev,
.modal-gallery .carousel-control-next {
    width: 10%;
}

.modal-gallery .carousel-indicators {
    bottom: -50px;
}

.modal-gallery .btn-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 1050;
    filter: invert(1);
}

/* ========================================
   반응형 디자인
   ======================================== */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }

    .section {
        padding: 35px 0;
    }

    .section-title {
        font-size: 2rem;
    }

    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 15px;
    }

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

@media (max-width: 576px) {
    :root {
        --section-spacing: 30px;
        --card-spacing: 15px;
    }

    .navbar-nav .nav-link {
        padding: 0.5rem 0;
    }
}

/* ========================================
   유틸리티 클래스
   ======================================== */
.text-accent {
    color: var(--accent);
}

.bg-light-gray {
    background-color: var(--bg-light);
}

.divider {
    border-top: 2px solid var(--border-color);
    margin: 3rem 0;
}

.mb-section {
    margin-bottom: var(--section-spacing);
}