:root {
    --primary-color: #6366f1;
    --primary-light: #e0e7ff;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #f9fafb;
    --white: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --radius: 12px;
}

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

body {
    font-family: 'Noto Sans KR', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

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

/* Header */
.header {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    height: 70px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    cursor: pointer;
    color: var(--text-color);
}

.logo .lite {
    color: var(--primary-color);
    font-weight: 300;
}

.nav-list {
    display: flex;
    gap: 20px;
    list-style: none;
}

.nav-list a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    padding: 8px 12px;
    border-radius: var(--radius);
    transition: all 0.2s;
}

.nav-list a:hover,
.nav-list a.active {
    background-color: var(--primary-light);
    color: var(--primary-color);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

/* Main Content */
main {
    padding: 40px 20px;
    min-height: calc(100vh - 140px);
}

@media (max-width: 768px) {
    .header-container {
        justify-content: space-between;
    }

    .mobile-menu-btn {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        width: 30px;
        height: 21px;
    }

    .mobile-menu-btn span {
        display: block;
        height: 3px;
        width: 100%;
        background-color: var(--text-color);
        border-radius: 3px;
    }

    .nav-list {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 10px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
    }

    .nav-list.active {
        display: flex;
    }

    .nav-list a {
        display: block;
        text-align: center;
    }

    .hero h2 {
        font-size: 1.8rem;
    }
}

/* Footer */
.footer {
    background-color: var(--white);
    border-top: 1px solid var(--border-color);
    padding: 30px 0;
    color: var(--text-light);
    text-align: center;
    font-size: 0.9rem;
}

/* Sections & Components */
.section-title {
    font-size: 2rem;
    margin-bottom: 30px;
    text-align: center;
    color: var(--text-color);
}

.card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    padding: 24px;
    transition: transform 0.2s, box-shadow 0.2s;
    border: 1px solid var(--border-color);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Home Page */
.hero {
    text-align: center;
    padding: 60px 20px;
    background-color: var(--white);
    border-radius: var(--radius);
    margin-bottom: 40px;
    box-shadow: var(--shadow-sm);
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 16px;
    color: var(--text-color);
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 40px;
}

.menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
}

.menu-card {
    text-align: center;
    padding: 40px 20px;
    cursor: pointer;
}

.menu-card h3 {
    margin-bottom: 10px;
    color: var(--primary-color);
}

/* Filters */
.filter-section {
    margin-bottom: 24px;
    background: var(--white);
    padding: 16px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}

/* Filter Toggle Button - Hidden by default (PC) */
.filter-toggle-btn {
    display: none;
}

/* PC: Ensure Filter is Always Visible */
@media (min-width: 769px) {
    .filter-section {
        display: block !important;
    }

    .filter-toggle-btn {
        display: none !important;
    }
}

/* Mobile: Toggle Logic */
@media (max-width: 768px) {
    .filter-section {
        display: none;
    }

    .filter-section.active {
        display: block;
        animation: slideDown 0.3s ease-out;
    }

    .filter-toggle-btn {
        display: block;
        width: 100%;
        margin-bottom: 12px;
        background-color: var(--white);
    }

    @keyframes slideDown {
        from {
            opacity: 0;
            transform: translateY(-10px);
        }

        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
}

.filter-group-title {
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-color);
}

.filter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.filter-buttons:last-child {
    margin-bottom: 0;
}

.filter-btn {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    background: white;
    border-radius: 20px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-color);
}

.filter-btn:hover {
    background-color: var(--bg-color);
    border-color: var(--text-light);
}

.filter-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.result-count {
    margin-bottom: 16px;
    font-size: 0.9rem;
    color: var(--text-light);
    text-align: right;
}

.search-container {
    max-width: 800px;
    margin: 0 auto;
}

/* Dictionary */
.search-bar {
    margin-bottom: 16px;
    display: flex;
    gap: 10px;
}

.search-input {
    flex: 1;
    padding: 12px 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    font-family: inherit;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.bead-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 16px;
}

.bead-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 16px;
}

.color-box {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    margin-bottom: 12px;
    border: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: inner 0 2px 4px rgba(0, 0, 0, 0.1);
}

.bead-code {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.bead-name {
    font-size: 0.9rem;
    color: var(--text-light);
    text-align: center;
}

/* Gallery & Patterns */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.pattern-card h3 {
    margin-bottom: 8px;
}

.pattern-info {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 16px;
}

.pattern-tags {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.tag {
    background-color: var(--primary-light);
    color: var(--primary-color);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.btn-outline {
    display: inline-block;
    padding: 8px 16px;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    border-radius: var(--radius);
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.2s;
    cursor: pointer;
    background: transparent;
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
}

/* Guide */
.guide-container {
    max-width: 800px;
    margin: 0 auto;
}

.guide-section {
    margin-bottom: 40px;
    background: var(--white);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.guide-section h3 {
    margin-bottom: 20px;
    color: var(--primary-color);
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.guide-content p {
    margin-bottom: 12px;
}

.guide-content ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

.guide-content li {
    margin-bottom: 8px;
}

@media (max-width: 768px) {
    .header-container {
        justify-content: center;
        /* 로고를 중앙에 배치 */
        position: relative;
        /* 햄버거 버튼의 절대 위치 기준점 */
    }

    .mobile-menu-btn {
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        width: 30px;
        height: 21px;

        /* 버튼을 오른쪽 끝으로 고정 */
        position: absolute;
        right: 20px;
        top: 50%;
        transform: translateY(-50%);
    }

    .mobile-menu-btn span {
        display: block;
        height: 3px;
        width: 100%;
        background-color: var(--text-color);
        border-radius: 3px;
    }

    .nav-list {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 10px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        z-index: 101;
    }

    .nav-list.active {
        display: flex;
    }

    .nav-list a {
        display: block;
        text-align: center;
    }

    .hero h2 {
        font-size: 1.8rem;
    }
}