@import url('https://cdn.jsdelivr.net/gh/orioncactus/pretendard/dist/web/static/pretendard.css');

:root {
    /* Light Mode Palette */
    --bg-color: #f8f9fa;
    --section-bg: rgba(255, 255, 255, 0.85);
    --text-color: #212529;
    --text-muted: #6c757d;
    --border-color: rgba(0, 0, 0, 0.1);
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --danger-color: #dc3545;
    --danger-hover: #c82333;
    --success-color: #28a745;
    --warning-color: #ffc107;
    
    /* Glassmorphism settings */
    --glass-blur: blur(12px);
    --glass-border: 1px solid rgba(255, 255, 255, 0.3);
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
}

body.dark-mode {
    /* Dark Mode Palette */
    --bg-color: #121212;
    --section-bg: rgba(30, 30, 30, 0.85);
    --text-color: #f8f9fa;
    --text-muted: #adb5bd;
    --border-color: rgba(255, 255, 255, 0.1);
    --primary-color: #4dabf7;
    --primary-hover: #3bc9db;
    --danger-color: #ff6b6b;
    --danger-hover: #fa5252;
    
    /* Glassmorphism settings */
    --glass-border: 1px solid rgba(255, 255, 255, 0.05);
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.5);
}

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    max-width: 1000px;
    margin: 0 auto;
    padding: 15px;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    line-height: 1.6;
    overflow-x: hidden; /* Prevent horizontal scroll */
}

/* Utilities */
.hidden { display: none !important; }
.text-center { text-align: center; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mt-2 { margin-top: 1rem; }
.flex { display: flex; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 1rem; }
.flex-wrap { flex-wrap: wrap; } /* Added for responsive wrapping */

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

/* Base Components */
section {
    background: var(--section-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
    border: var(--glass-border);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-sizing: border-box; /* Prevent overflow */
    width: 100%;
}

/* Forms & Inputs */
input, textarea, select {
    width: 100%;
    padding: 12px 16px;
    margin: 8px 0;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-sizing: border-box;
    font-size: 16px; /* 16px prevents iOS zoom */
    background: transparent;
    color: var(--text-color);
    font-family: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    max-width: 100%;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

body.dark-mode input:focus, body.dark-mode textarea:focus, body.dark-mode select:focus {
    box-shadow: 0 0 0 3px rgba(77, 171, 247, 0.25);
}

/* Buttons */
button {
    background: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    font-weight: 600;
    font-size: 15px;
    padding: 10px 16px;
    border-radius: 8px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-sizing: border-box;
    white-space: nowrap;
}

button:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

button:active {
    transform: translateY(1px);
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

button.danger-btn { background: var(--danger-color); }
button.danger-btn:hover { background: var(--danger-hover); }
button.secondary-btn { background: #6c757d; }
button.secondary-btn:hover { background: #5a6268; }
button.info-btn { background: #17a2b8; }
button.info-btn:hover { background: #138496; }
button.warning-btn { background: var(--warning-color); color: #212529; }
button.warning-btn:hover { background: #e0a800; }

/* Navigation */
.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding: 10px 0;
    flex-wrap: wrap;
    gap: 10px;
}

.top-nav h1 {
    font-size: 2rem;
    background: linear-gradient(45deg, var(--primary-color), #ff6b6b);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin: 0;
}

/* Comic Grid */
.comic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 20px;
    width: 100%;
}

.comic-card {
    background: var(--section-bg);
    border: var(--glass-border);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
}

.comic-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.comic-card .thumbnail-container {
    position: relative;
    background: rgba(0,0,0,0.05);
    cursor: pointer;
    aspect-ratio: 3 / 4;
    overflow: hidden;
}

body.dark-mode .comic-card .thumbnail-container {
    background: rgba(255,255,255,0.05);
}

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

.comic-card:hover img {
    transform: scale(1.05);
}

.fav-icon {
    position: absolute;
    top: 8px;
    right: 8px;
    font-size: 24px;
    cursor: pointer;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
    z-index: 10;
    transition: transform 0.2s ease;
}

.fav-icon:hover {
    transform: scale(1.2);
}

.comic-info {
    padding: 12px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.comic-title {
    font-weight: 700;
    font-size: 15px;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.comic-author {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.comic-actions {
    margin-top: auto;
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.comic-actions button {
    padding: 4px 8px;
    font-size: 12px;
    flex: 1;
}

/* Viewer (Webtoon style) */
#viewer-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    background: #000;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

#viewer-header {
    padding: 12px 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(30, 30, 30, 0.9);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid rgba(255,255,255,0.1);
    color: white;
    z-index: 10;
    position: absolute;
    top: 0;
    width: 100%;
    box-sizing: border-box;
    transition: transform 0.3s ease;
}

#viewer-header.hide {
    transform: translateY(-100%);
}

#viewer-header h4 {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 50vw;
}

#viewer-content-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    background: #111;
    scroll-behavior: smooth;
    width: 100%;
}

.webtoon-image {
    max-width: 100%;
    width: 100%; /* Ensure it spans full width on mobile */
    max-width: 800px;
    display: block;
    margin: 0 auto;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    padding: 15px; /* Prevent touching edges on mobile */
    box-sizing: border-box;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-color);
    padding: 24px;
    border-radius: 16px;
    width: 100%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    border: var(--glass-border);
    transform: scale(0.95);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    max-height: 90vh;
    overflow-y: auto; /* Scroll inside modal if content is long */
    box-sizing: border-box;
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.modal-content.large {
    max-width: 800px;
}

/* Progress bar */
#progress-bar-container {
    width: 100%;
    background-color: var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    height: 16px;
    margin-top: 12px;
}

#progress-bar {
    width: 0%;
    height: 100%;
    background-color: var(--success-color);
    text-align: center;
    line-height: 16px;
    color: white;
    font-size: 11px;
    font-weight: bold;
    transition: width 0.3s ease;
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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

/* Admin lists */
.list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding: 10px;
    background: var(--bg-color);
    border-radius: 6px;
    margin-bottom: 8px;
    flex-wrap: wrap; /* Prevent overflow */
    gap: 8px;
}

.list-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

/* Drag and Drop Feedback */
.draggable {
    cursor: grab;
}
.draggable:active {
    cursor: grabbing;
}
.draggable.dragging {
    opacity: 0.5;
    transform: scale(0.95);
    box-shadow: none;
}
.draggable.drag-over {
    border: 2px dashed var(--primary-color);
    transform: scale(1.02);
}

/* =======================================
   Responsive Design (Mobile Overrides)
   ======================================= */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    section {
        padding: 15px;
    }
    
    .top-nav h1 {
        font-size: 1.5rem;
    }
    
    .comic-grid {
        /* 2 columns on small screens, smaller gap */
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    /* Pages modal grid specifically for mobile */
    #pages-list.comic-grid {
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 8px;
    }
    
    .modal-content {
        padding: 16px;
    }
    
    h3 {
        font-size: 1.2rem;
    }
    
    .flex.gap-2.align-center.mb-2 {
        /* Search bar and favorite button layout */
        flex-wrap: nowrap;
    }
    
    /* Make buttons stack properly if space is too tight */
    .comic-actions {
        flex-direction: column;
    }
    
    #admin-section, #upload-section {
        padding: 10px !important;
    }
    
    /* Viewer fixes for mobile */
    #viewer-header {
        padding: 8px 10px;
    }
    
    #viewer-header h4 {
        font-size: 14px;
        max-width: 40vw;
    }
    
    #viewer-close-btn {
        padding: 6px 10px;
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    /* Even smaller screens (phones in portrait) */
    .comic-grid {
        /* Can switch to 1 column or stay at 2 depending on preference. Let's keep 2 but tighter */
        gap: 10px;
    }
    
    #pages-list.comic-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    
    .list-item {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .list-item > div {
        width: 100%;
        display: flex;
        justify-content: flex-end;
    }
}

/* Manga Mode */
.manga-image { max-width: 100vw; max-height: 100vh; width: auto; height: auto; object-fit: contain; cursor: pointer; display: block; margin: auto; margin-top: 50px; } 

#viewer-footer { position: absolute; bottom: 0; width: 100%; padding: 12px 15px; display: flex; justify-content: center; align-items: center; gap: 15px; background: rgba(30, 30, 30, 0.9); backdrop-filter: var(--glass-blur); -webkit-backdrop-filter: var(--glass-blur); border-top: 1px solid rgba(255,255,255,0.1); z-index: 10; box-sizing: border-box; transition: transform 0.3s ease; }
#viewer-footer.hide { transform: translateY(100%); }