:root {
    --bg-color: #0A0A0A;
    --card-bg: #161616;
    --text-primary: #FFFFFF;
    --text-secondary: #A0A0A0;
    --accent: #3B82F6;
    --accent-hover: #2563EB;
    --border-color: #262626;
    --header-bg: rgba(10, 10, 10, 0.8);
    --grid-gap: 24px;
    --card-radius: 12px;
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
}

.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.main-header {
    margin-bottom: 30px;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

@media (min-width: 768px) {
    .main-header {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

.header-content h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 4px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Search */
.search-container {
    width: 100%;
    max-width: 400px;
}

.search-box {
    position: relative;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    padding: 0 12px;
    transition: var(--transition);
}

.search-box:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.search-icon {
    color: var(--text-secondary);
    margin-right: 8px;
}

#searchInput {
    width: 100%;
    padding: 12px 0;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
}

#searchInput::placeholder {
    color: #555;
}

.result-count {
    margin-top: 8px;
    font-size: 12px;
    color: var(--text-secondary);
    text-align: right;
}

/* Back Button & Nav */
.back-container {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 24px;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.back-btn:hover {
    color: var(--accent);
}

.category-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

/* Category Grid */
.category-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--grid-gap);
    margin-bottom: 60px;
}

@media (min-width: 500px) {
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 800px) {
    .category-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1100px) {
    .category-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.category-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 160px;
    transition: var(--transition);
    cursor: pointer;
}

.category-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
    box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.3);
}

.cat-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.cat-meta {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}

.cat-explore {
    background: #000030; /* Dark blue from usage image reference */
    color: white;
    padding: 8px 16px;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 500;
    transition: var(--transition);
}

.category-card:hover .cat-explore {
    background: var(--accent);
}

.cat-count {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Library Grid */
.library-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: var(--grid-gap);
    margin-bottom: 80px;
}

@media (min-width: 550px) {
    .library-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 900px) {
    .library-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1200px) {
    .library-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Templates */
.template-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    overflow: hidden;
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.template-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
    box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.3);
}

.image-container {
    position: relative;
    width: 100%;
    /* aspect-ratio removed to allow full height */
    min-height: 200px; /* Ensure skeleton is visible before load */
    background: #1a1a1a;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Skeleton Loading Animation */
.image-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.05), transparent);
    transform: translateX(-100%);
    animation: loading-shimmer 1.5s infinite;
    z-index: 1;
}

@keyframes loading-shimmer {
    100% { transform: translateX(100%); }
}

.template-image {
    width: 100%;
    height: auto;
    display: block;
    opacity: 0;
    transition: opacity 0.5s ease;
    position: relative;
    z-index: 2;
}

.template-image.loaded {
    opacity: 1;
}

/* Hide skeleton when image is loaded */
.template-image.loaded + .image-container::before {
    display: none;
}

.template-card:hover .template-image {
    /* transform: scale(1.05); Remove zoom on hover since it might cut off edges in this mode */
    opacity: 0.9;
}

.card-content {
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--border-color);
}

.template-id {
    font-weight: 600;
    font-size: 16px;
    color: var(--text-primary);
}

.view-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 12px;
    font-weight: 500;
    transition: var(--transition);
}

.view-btn:hover {
    background: var(--accent);
    color: white;
}

/* Pagination */
.pagination-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--header-bg);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color);
    padding: 16px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    z-index: 100;
}

.pagination-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.pagination-btn:hover:not(:disabled) {
    border-color: var(--accent);
    color: var(--accent);
}

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.page-info {
    color: var(--text-secondary);
    font-size: 14px;
    min-width: 120px;
    text-align: center;
}

/* Loading/Empty State */
.loading, .no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 0;
    color: var(--text-secondary);
    font-size: 16px;
}

/* Card Actions */
.card-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--accent);
    color: white;
    border-radius: 6px;
    transition: var(--transition);
}

.download-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

/* Modal Styles */
.modal-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal-backdrop.active {
    display: flex;
}

.modal-content {
    background: var(--bg-color);
    border-radius: var(--card-radius);
    max-width: 900px;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
}

.modal-iframe {
    width: 95vw;
    height: 95vh;
    max-width: none;
    max-height: none;
}

.modal-header {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    background: var(--card-bg);
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    justify-content: flex-end;
}

.btn-open-new, .modal-close {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    background: transparent;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition);
}

.btn-open-new {
    display: none; /* User requested to hide this */
}

.btn-open-new:hover, .modal-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-color: white;
}

.modal-body {
    flex: 1;
    position: relative;
    background: #000;
    overflow: hidden;
}

.modal-body iframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
}

/* Loading Spinner */
.iframe-loading {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-color);
    z-index: 10;
}

.iframe-loading.hidden {
    display: none;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.iframe-loading p {
    margin-top: 16px;
    color: var(--text-secondary);
    font-size: 14px;
}

/* Login Overlay */
.login-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: #000;
    z-index: 9999;
    display: flex; /* Flex by default */
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease;
}

.login-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.login-box {
    background: rgba(20, 20, 20, 0.9);
    border: 1px solid rgba(255, 255, 255, 0.1);
    padding: 3rem;
    border-radius: 20px;
    text-align: center;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.login-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.login-box h2 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: #fff;
}

.login-box p {
    color: #888;
    margin-bottom: 2rem;
    font-size: 0.9rem;
}

.input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 1rem;
}

.login-box input {
    flex: 1;
    background: #111;
    border: 1px solid #333;
    padding: 0.8rem 1rem;
    border-radius: 8px;
    color: #fff;
    font-size: 1rem;
    outline: none;
    transition: all 0.3s ease;
}

.login-box input:focus {
    border-color: #fff;
    box-shadow: 0 0 0 2px rgba(255,255,255,0.1);
}

.login-btn {
    background: #fff;
    color: #000;
    border: none;
    width: 45px;
    height: 44px; /* Align with input padding */
    border-radius: 8px;
    font-size: 1.2rem;
    cursor: pointer;
    transition: transform 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-btn:hover {
    transform: scale(1.05);
}

.error-message {
    color: #ff4444 !important;
    font-size: 0.85rem !important;
    min-height: 1.2em;
    margin-bottom: 0 !important;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.shake {
    animation: shake 0.3s ease-in-out;
    border-color: #ff4444 !important;
}

/* Responsive Controls */
.modal-responsive-controls {
    display: flex;
    gap: 8px;
    margin: 0 16px;
    padding: 4px;
    background: var(--card-bg); /* Match header */
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.responsive-btn {
    width: 36px;
    height: 36px;
    background: transparent;
    border: none;
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.responsive-btn:hover {
    color: white;
    background: rgba(255, 255, 255, 0.1);
}

.responsive-btn.active {
    background: var(--accent);
    color: white;
}

/* Iframe Responsive States */
.modal-body {
    display: flex;
    justify-content: center;
    align-items: start; /* Scale from top */
    background: #0F0F0F; /* Darker bg to show device boundaries */
    padding-top: 0; 
}

#previewIframe {
    width: 100%;
    height: 100%;
    border: none;
    display: block;
    margin: 0 auto;
    transition: width 0.4s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.4s ease;
    background: #fff;
    transform-origin: top center;
}

.iframe-mobile {
    width: 375px !important;
    border-right: 1px solid #333;
    border-left: 1px solid #333;
    box-shadow: 0 0 0 1px #333, 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.iframe-tablet {
    width: 768px !important;
    border-right: 1px solid #333;
    border-left: 1px solid #333;
    box-shadow: 0 0 0 1px #333, 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.iframe-desktop {
    width: 100% !important;
    box-shadow: none;
}