/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scroll-behavior: smooth;
}

:root {
    --bg-color: #ffffff;
    --text-color: #1a202c;
    --nav-bg: #f7fafc;
    --box-bg: #ffffff;
    --box-shadow: rgba(0, 0, 0, 0.1);
    --border-color: #e2e8f0;
    --hover-bg: #f7fafc;
    --modal-bg: rgba(0, 0, 0, 0.5);
    --primary-color: #3182ce;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    line-height: 1.6;
}

/* Dark Mode Styles */
body.dark-mode {
    --bg-color: #1a202c;
    --text-color: #f7fafc;
    --nav-bg: #2d3748;
    --box-bg: #2d3748;
    --box-shadow: rgba(0, 0, 0, 0.3);
    --border-color: #4a5568;
    --hover-bg: #374151;
}

/* Navigation Bar */
#navbar {
    background-color: var(--nav-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 4px var(--box-shadow);
    transition: background-color 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-buttons {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.nav-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease;
    color: var(--text-color);
}

.nav-btn:hover {
    background-color: var(--hover-bg);
}

.nav-btn svg {
    width: 24px;
    height: 24px;
}

/* Search Container */
.search-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    transition: all 0.3s ease;
}

.search-container.hidden {
    display: none;
}

.search-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: border-color 0.2s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Language Modal */
.lang-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--modal-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    transition: opacity 0.3s ease;
}

.lang-modal.hidden {
    display: none;
}

.lang-modal-content {
    background-color: var(--box-bg);
    padding: 2rem;
    border-radius: 1rem;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 10px 25px var(--box-shadow);
}

.lang-modal-content h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.lang-option {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    margin-bottom: 0.5rem;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 1rem;
    color: var(--text-color);
    transition: all 0.2s ease;
}

.lang-option:hover {
    background-color: var(--hover-bg);
    border-color: var(--primary-color);
}

.close-modal {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    margin-top: 1rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 1rem;
    transition: opacity 0.2s ease;
}

.close-modal:hover {
    opacity: 0.9;
}

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Boxes Grid */
.boxes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
}

/* Individual Box */
.box {
    background-color: var(--box-bg);
    border-radius: 0.75rem;
    overflow: hidden;
    box-shadow: 0 4px 6px var(--box-shadow);
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.box:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 12px var(--box-shadow);
}

.box-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.box-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.box:hover .box-image img {
    transform: scale(1.05);
}

.box-content {
    padding: 1.25rem;
}

.box-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.box-subtitle {
    font-size: 0.95rem;
    color: #718096;
}

body.dark-mode .box-subtitle {
    color: #a0aec0;
}

/* Detail View */
.detail-view {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-color);
    z-index: 150;
    overflow-y: auto;
    padding: 2rem 1.5rem;
    transition: opacity 0.3s ease;
}

.detail-view.hidden {
    display: none;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 1rem;
    margin-bottom: 2rem;
    transition: opacity 0.2s ease;
}

.back-btn:hover {
    opacity: 0.9;
}

.detail-content {
    max-width: 800px;
    margin: 0 auto;
}

.detail-image {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
    border-radius: 1rem;
    margin-bottom: 2rem;
}

.detail-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-color);
}

.detail-paragraph {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-color);
    text-align: justify;
}

/* Hidden Class */
.hidden {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 1rem;
    }

    .nav-logo h1 {
        font-size: 1.25rem;
    }

    .boxes-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: 1rem;
    }

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

    .detail-paragraph {
        font-size: 1rem;
    }

    .main-content {
        padding: 1.5rem 1rem;
    }
}

@media (max-width: 480px) {
    .boxes-grid {
        grid-template-columns: 1fr;
    }

    .nav-buttons {
        gap: 0.5rem;
    }

    .nav-btn {
        padding: 0.4rem;
    }

    .detail-title {
        font-size: 1.75rem;
    }

    .box-image {
        height: 180px;
    }
}

.box {
    animation: fadeInUp 0.6s ease-out;
    animation-fill-mode: backwards;
    /* Remove all nth-child rules */
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}