/* Global Reset & System Variables */
:root {
    --bg-dark: #0b0f19;
    --bg-card: #151d30;
    --bg-card-hover: #1f2a45;
    --border-color: #273554;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --secondary: #64748b;
    --secondary-hover: #475569;
    
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --success-border: rgba(16, 185, 129, 0.2);
    
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --danger-border: rgba(239, 68, 68, 0.2);
    
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --warning-border: rgba(245, 158, 11, 0.2);
    
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-heading: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --transition-speed: 0.25s;
    --border-radius: 12px;
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
}

/* App Container */
.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1.5rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-icon {
    font-size: 2.2rem;
    color: var(--primary);
    filter: drop-shadow(0 0 10px rgba(59, 130, 246, 0.4));
}

.logo-text h1 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    background: linear-gradient(135deg, #60a5fa 0%, #3b82f6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-text span {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 8px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    text-decoration: none;
    color: white;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.25);
}

.btn-secondary {
    background-color: var(--secondary);
}

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

.btn-outline {
    background-color: transparent;
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover:not(:disabled) {
    background-color: rgba(255, 255, 255, 0.05);
    border-color: var(--text-primary);
}

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

/* Upload Section */
.upload-section {
    display: flex;
    gap: 1.5rem;
    align-items: stretch;
}

.upload-card {
    flex: 1;
    background-color: var(--bg-card);
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: 2.5rem;
    position: relative;
    transition: all var(--transition-speed) ease;
}

.upload-card.dragover {
    border-color: var(--primary);
    background-color: var(--bg-card-hover);
    transform: scale(1.01);
}

.upload-card.success-loaded {
    border-color: var(--success);
    border-style: solid;
}

.card-badge {
    position: absolute;
    top: 1rem;
    left: 1rem;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    text-transform: uppercase;
    font-family: var(--font-heading);
}

.badge-a {
    background-color: rgba(59, 130, 246, 0.2);
    color: #93c5fd;
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.badge-b {
    background-color: rgba(168, 85, 247, 0.2);
    color: #d8b4fe;
    border: 1px solid rgba(168, 85, 247, 0.3);
}

.upload-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 1.25rem;
    margin-top: 1rem;
}

.upload-icon {
    font-size: 3.5rem;
    color: var(--text-muted);
    transition: color var(--transition-speed);
}

.upload-card:hover .upload-icon {
    color: var(--primary);
}

.upload-area h3 {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
}

.upload-area p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.btn-group {
    display: flex;
    gap: 0.75rem;
}

.loaded-status {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.loaded-status.loaded {
    color: var(--success);
}

/* Compare Divider */
.compare-divider {
    display: flex;
    align-items: center;
    justify-content: center;
}

.vs-circle {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--border-color);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    border: 2px solid var(--bg-dark);
    font-family: var(--font-heading);
}

/* Loading Overlay */
.loader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(11, 15, 25, 0.85);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    z-index: 1000;
    backdrop-filter: blur(6px);
}

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

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.hidden {
    display: none !important;
}

/* Stats Section */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.stat-info {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.stat-value {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    font-weight: 800;
    margin-top: 0.25rem;
}

.stat-card i {
    font-size: 2rem;
    opacity: 0.3;
}

.stat-card.match { border-left: 4px solid var(--success); }
.stat-card.diff { border-left: 4px solid var(--danger); }
.stat-card.unique-a { border-left: 4px solid var(--primary); }
.stat-card.unique-b { border-left: 4px solid #a855f7; }

/* Match Result Banner */
.match-result-banner {
    padding: 1.25rem;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
    font-weight: 600;
    font-size: 1.1rem;
}

.match-result-banner.success {
    background-color: var(--success-bg);
    border: 1px solid var(--success-border);
    color: var(--success);
}

.match-result-banner.failure {
    background-color: var(--danger-bg);
    border: 1px solid var(--danger-border);
    color: var(--danger);
}

/* Table Controls */
.table-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
}

.search-box {
    position: relative;
    flex: 1;
    max-width: 400px;
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-box input {
    width: 100%;
    padding: 0.625rem 1rem 0.625rem 2.5rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    transition: all var(--transition-speed);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.filter-tabs {
    display: flex;
    background-color: var(--bg-card);
    padding: 4px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    font-weight: 600;
    font-size: 0.85rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    background-color: var(--border-color);
    color: var(--text-primary);
}

/* File Table */
.table-container {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.file-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
}

.file-table th, .file-table td {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.file-table th {
    background-color: rgba(255, 255, 255, 0.02);
    color: var(--text-secondary);
    font-weight: 600;
}

.file-table tbody tr {
    transition: background-color var(--transition-speed);
}

.file-table tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

/* Row states */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    text-transform: uppercase;
}

.status-badge.match { background-color: var(--success-bg); color: var(--success); }
.status-badge.diff { background-color: var(--danger-bg); color: var(--danger); }
.status-badge.only-a { background-color: rgba(59, 130, 246, 0.1); color: #60a5fa; }
.status-badge.only-b { background-color: rgba(168, 85, 247, 0.1); color: #c084fc; }

.hash-cell {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-secondary);
    max-width: 250px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.action-cell .btn {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
}

/* Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(11, 15, 25, 0.85);
    backdrop-filter: blur(6px);
}

.modal-wrapper {
    position: relative;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    width: 100%;
    max-width: 1200px;
    height: 85vh;
    border-radius: var(--border-radius);
    display: flex;
    flex-direction: column;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    z-index: 2001;
    overflow: hidden;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background-color: rgba(255, 255, 255, 0.01);
}

.modal-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.file-type-badge {
    background-color: var(--primary);
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-family: var(--font-heading);
}

#modal-file-path {
    font-size: 1.1rem;
    font-weight: 600;
    word-break: break-all;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color var(--transition-speed);
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-content {
    flex: 1;
    overflow-y: auto;
    padding: 1.5rem;
}

/* Image Diff View */
.image-diff-view {
    display: flex;
    flex-direction: column;
    height: 100%;
    gap: 1rem;
}

.image-view-options {
    display: flex;
    gap: 0.5rem;
    align-self: center;
}

.btn-tab {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-tab.active {
    background-color: var(--border-color);
    color: var(--text-primary);
}

.image-display-area {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    overflow: auto;
    padding: 1.5rem;
}

.img-mode-container {
    width: 100%;
    display: flex;
    justify-content: center;
}

.canvas-wrapper {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

#diff-canvas {
    max-width: 100%;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
}

.canvas-label, .img-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    background-color: rgba(11, 15, 25, 0.85);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    margin-top: 0.5rem;
}

/* Image Slider Comparison */
.slider-comparison {
    position: relative;
    width: 100%;
    max-width: 800px;
    min-height: 400px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
}

.slider-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.slider-img img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.img-a-wrapper {
    z-index: 1;
}

.img-b-wrapper {
    z-index: 2;
    width: 50%; /* JS controlled */
    overflow: hidden;
    border-right: 2px solid var(--primary);
}

/* Make sure the B image within its wrapper retains the container's absolute dimensions to avoid scaling offset */
.img-b-wrapper img {
    width: 800px; /* Will be set dynamically by JS, matching slider container width */
    max-width: none;
}

.img-label {
    position: absolute;
    bottom: 10px;
    z-index: 3;
}

.left-label { left: 10px; }
.right-label { right: 10px; }

.image-slider {
    position: absolute;
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 100%;
    background: transparent;
    outline: none;
    margin: 0;
    z-index: 10;
    cursor: ew-resize;
    top: 0;
    left: 0;
}

.image-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 4px;
    height: 600px;
    background: var(--primary);
}

/* Side by Side Images */
.side-images {
    display: flex;
    gap: 1.5rem;
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
}

.side-img-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(0,0,0,0.1);
    padding: 10px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.side-img-box img {
    max-width: 100%;
    max-height: 50vh;
    object-fit: contain;
}

/* Code Diff View */
.text-diff-view {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    height: 100%;
}

.diff-header-info {
    display: flex;
    gap: 1.5rem;
    font-size: 0.85rem;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 3px;
}

.legend-item.addition .legend-color { background-color: var(--success-bg); border: 1px solid var(--success); }
.legend-item.deletion .legend-color { background-color: var(--danger-bg); border: 1px solid var(--danger); }

.code-diff-container {
    flex: 1;
    background-color: #05070f;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.6;
    overflow: auto;
}

.diff-output {
    white-space: pre-wrap;
    word-break: break-all;
}

/* Diff formatting classes (standard format) */
.diff-line {
    display: flex;
    padding: 0.15rem 0.5rem;
    border-radius: 3px;
}

.diff-line.added {
    background-color: rgba(16, 185, 129, 0.15);
    color: #34d399;
}

.diff-line.removed {
    background-color: rgba(239, 68, 68, 0.15);
    color: #f87171;
}

.diff-line.normal {
    color: var(--text-secondary);
}

/* Single Preview Styles */
.single-preview-view {
    display: flex;
    flex-direction: column;
    height: 100%;
    justify-content: center;
    align-items: center;
}

.single-preview-area {
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

#single-preview-img {
    max-width: 100%;
    max-height: 70vh;
    object-fit: contain;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
}

#single-preview-text-container {
    width: 100%;
}

/* Mobile responsive fixes */
@media(max-width: 900px) {
    .upload-section {
        flex-direction: column;
    }
    .compare-divider {
        padding: 1rem 0;
    }
    .table-controls {
        flex-direction: column;
        align-items: stretch;
    }
    .search-box {
        max-width: none;
    }
}