:root {
    /* Color Palette: Light Theme */
    --bg-primary: #F9FAFB;
    --bg-surface: #FFFFFF;
    --bg-surface-hover: #F3F4F6;
    --border-subtle: #E5E7EB;
    --border-strong: #D1D5DB;
    
    --text-primary: #111827;
    --text-secondary: #4B5563;
    --text-tertiary: #6B7280;
    
    --accent-color: #2563EB; /* Professional Blue */
    --accent-hover: #1D4ED8;
    --danger-color: #EF4444;
    --success-color: #10B981;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    
    /* Spacing & Grid */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;

    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: 150ms var(--ease-out);
    --transition-normal: 300ms var(--ease-out);
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-accent { color: var(--accent-color); }

/* Layouts */
#app {
    width: 100vw;
    height: 100vh;
    display: flex;
}

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

.flex-row {
    display: flex;
    align-items: center;
}

.flex-col {
    display: flex;
    flex-direction: column;
}

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* UI Components */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0 var(--space-lg);
    height: 40px;
    font-size: 14px;
    font-weight: 500;
    border-radius: 4px; /* Slightly rounded for modern UI */
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
    outline: none;
}

.btn-primary {
    background-color: var(--accent-color);
    color: #fff;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}
.btn-primary:hover {
    background-color: var(--accent-hover);
}

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

.btn-danger {
    color: var(--danger-color);
    background: transparent;
    border: 1px solid var(--danger-color);
}
.btn-danger:hover {
    background: rgba(239, 68, 68, 0.1);
}

.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: color var(--transition-fast);
}
.btn-icon:hover {
    color: var(--text-primary);
}

/* Forms */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
}

.form-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-control {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-strong);
    color: var(--text-primary);
    padding: 0 var(--space-md);
    height: 40px;
    font-size: 14px;
    font-family: var(--font-sans);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    border-radius: 4px;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.2);
}

/* Checkboxes */
.checkbox-group {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
}
.checkbox-group input[type="checkbox"] {
    accent-color: var(--accent-color);
    width: 16px;
    height: 16px;
}

/* Tables */
.table-container {
    width: 100%;
    overflow-x: auto;
    border-radius: 6px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    background-color: var(--bg-surface);
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th, td {
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-subtle);
}

th {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    background-color: #F9FAFB;
}

td {
    font-size: 14px;
    color: var(--text-primary);
}

tbody tr:hover {
    background-color: var(--bg-surface-hover);
}

/* Tags/Badges */
.tag {
    display: inline-flex;
    padding: 2px 8px;
    background-color: #E0E7FF;
    color: #3730A3;
    font-size: 12px;
    font-weight: 500;
    border-radius: 4px;
    margin-right: 4px;
}

/* Layout Specifics */
/* Login */
.login-wrapper {
    width: 100%;
    height: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.login-visual {
    background: #EFF6FF;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: var(--space-3xl);
    border-right: 1px solid var(--border-subtle);
}

.grid-bg {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image: 
      linear-gradient(rgba(37, 99, 235, 0.1) 1px, transparent 1px),
      linear-gradient(90deg, rgba(37, 99, 235, 0.1) 1px, transparent 1px);
    background-size: 40px 40px;
    z-index: 0;
}

.login-form-container {
    padding: var(--space-3xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
    max-width: 480px;
    margin: 0 auto;
    width: 100%;
    background: var(--bg-surface);
}

/* Dashboard */
.dashboard-layout {
    display: flex;
    width: 100%;
    height: 100%;
}

.sidebar {
    width: 240px;
    background-color: var(--bg-surface);
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    padding: var(--space-xl) 0;
}

.sidebar-header {
    padding: 0 var(--space-xl);
    margin-bottom: var(--space-xl);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-xl);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
    font-weight: 500;
}

.nav-item:hover {
    color: var(--text-primary);
    background-color: var(--bg-surface-hover);
}

.nav-item.active {
    color: var(--accent-color);
    border-right: 3px solid var(--accent-color);
    background-color: #EFF6FF;
}

.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background-color: var(--bg-primary);
}

.topbar {
    height: 64px;
    background-color: var(--bg-surface);
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-xl);
}

.content-area {
    flex: 1;
    overflow: hidden;
    padding: var(--space-2xl);
    display: flex;
    flex-direction: column;
}

/* View Specifics */
.view-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.view-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: var(--space-xl);
    flex-shrink: 0;
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border-strong);
    padding: var(--space-2xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    background-color: var(--bg-surface);
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: var(--space-xl);
    flex-shrink: 0;
}

.upload-zone:hover {
    border-color: var(--accent-color);
    background-color: #EFF6FF;
}

/* Tables */
.table-container {
    width: 100%;
    overflow-y: auto;
    overflow-x: auto;
    border-radius: 6px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    background-color: var(--bg-surface);
    flex: 1;
    min-height: 0;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    text-align: left;
}

th, td {
    padding: var(--space-md);
    border-bottom: 1px solid var(--border-subtle);
}

th {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    background-color: #F9FAFB;
    position: sticky;
    top: 0;
    z-index: 10;
}

td {
    font-size: 14px;
    color: var(--text-primary);
}

tbody tr:hover {
    background-color: var(--bg-surface-hover);
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-top: var(--space-md);
    gap: var(--space-sm);
    flex-shrink: 0;
}

.pagination-btn {
    padding: 6px 12px;
    background: var(--bg-surface);
    border: 1px solid var(--border-strong);
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

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

.pagination-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: var(--bg-surface-hover);
}

.pagination-info {
    font-size: 14px;
    color: var(--text-secondary);
    margin-right: var(--space-md);
}
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.cad-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    overflow: hidden;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.cad-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    border-color: var(--accent-color);
}

.cad-thumbnail {
    width: 100%;
    height: 180px;
    object-fit: cover;
    background-color: #F3F4F6;
    cursor: pointer;
    border-bottom: 1px solid var(--border-subtle);
}

.cad-info {
    padding: var(--space-md);
}

.match-score {
    font-size: 20px;
    font-weight: 700;
    color: var(--success-color);
    margin-bottom: var(--space-xs);
}

/* Hidden visual container for Viewer.js */
.hidden-gallery {
    display: none;
}

/* --- Added Styles --- */

/* CAD Login Animations */
@keyframes gridMove {
    0% { transform: translateY(0); }
    100% { transform: translateY(40px); }
}

/* CAD Search Scanner */
@keyframes scanline {
    0% { top: 0%; opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { top: 100%; opacity: 0; }
}

.scanner-container {
    position: relative;
    width: 120px;
    height: 120px;
    border: 2px solid var(--accent-color);
    border-radius: 8px;
    overflow: hidden;
    margin: 0 auto 16px;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 100 100"><path d="M10,50 Q25,25 50,50 T90,50" fill="none" stroke="%232563EB" stroke-width="2" opacity="0.3"/></svg>') center/cover;
}

.scanner-line {
    position: absolute;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-color);
    box-shadow: 0 0 10px var(--accent-color), 0 0 20px var(--accent-color);
    animation: scanline 2s linear infinite;
}

/* Modal styles */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
}
.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}
.modal-content {
    background: var(--bg-surface);
    padding: var(--space-2xl);
    border-radius: 8px;
    width: 400px;
    max-width: 90vw;
    box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
    transform: translateY(20px);
    transition: transform var(--transition-fast);
}
.modal-overlay.active .modal-content {
    transform: translateY(0);
}
.modal-header {
    margin-bottom: var(--space-md);
    font-size: 18px;
    font-weight: 600;
}
.modal-body {
    margin-bottom: var(--space-xl);
    color: var(--text-secondary);
}
.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-md);
}
/* SNS Tag Styles */
.sns-tag {
    display: inline-block;
    padding: 2px 8px;
    font-size: 12px;
    font-weight: 500;
    color: var(--accent-color);
    background-color: rgba(37, 99, 235, 0.1);
    border: 1px solid rgba(37, 99, 235, 0.2);
    border-radius: 4px;
    white-space: nowrap;
    transition: all var(--transition-fast);
}

.sns-tag:hover {
    background-color: rgba(37, 99, 235, 0.15);
    border-color: rgba(37, 99, 235, 0.3);
}