/* Replit Brand Light Design System */
:root {
    --bg-main: #ffffff;
    --bg-card: #f6f8fa;
    --bg-input: #ffffff;
    --border-color: #d1d5db;
    --border-focus: #f25c05;
    
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    
    /* Replit Accent Colors (Light Mode) */
    --primary: #f25c05; /* Replit signature orange */
    --primary-glow: rgba(242, 92, 5, 0.15);
    --primary-hover: #d84b00;
    --accent: #0969da; /* High-contrast royal blue for light mode highlights */
    --accent-glow: rgba(9, 105, 218, 0.1);
    
    /* Semantic Colors */
    --success: #1a7f37;
    --warning: #9a6700;
    --danger: #cf222e;
    --info: #0969da;
    
    /* IDE Layout Spacing */
    --radius-lg: 8px;
    --radius-md: 6px;
    --radius-sm: 4px;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.05), 0 8px 24px rgba(149, 157, 165, 0.15);
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

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

/* Scrollbars - thin & developer style */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: var(--bg-main);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-sm);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

.app-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    gap: 16px;
}

/* Header - Replit Light Nav Style */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    font-size: 24px;
    color: var(--primary);
    background: rgba(242, 92, 5, 0.06);
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    border: 1px solid rgba(242, 92, 5, 0.15);
}

.logo-icon svg {
    width: 22px;
    height: 22px;
    stroke: var(--primary);
}

.logo-text h1 {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.3px;
    color: var(--text-primary);
}

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

.tagline {
    font-size: 11px;
    color: var(--text-secondary);
    font-weight: 400;
}

.header-badges {
    display: flex;
    gap: 8px;
}

.badge {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    font-family: var(--font-mono);
}

.badge-success {
    color: var(--success);
    border-color: rgba(26, 127, 55, 0.2);
    background: rgba(26, 127, 55, 0.03);
}

.badge-info {
    color: var(--info);
    border-color: rgba(9, 105, 218, 0.2);
    background: rgba(9, 105, 218, 0.03);
}

/* Main Grid Layout */
.app-main {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 16px;
    flex-grow: 1;
    align-items: start;
}

@media (max-width: 1024px) {
    .app-main {
        grid-template-columns: 1fr;
    }
}

/* Replit Panel Card */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow);
}

.section-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-primary);
}

.section-title svg {
    color: var(--primary);
    width: 16px;
    height: 16px;
}

.card-title {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.card-title svg {
    color: var(--primary);
    width: 15px;
    height: 15px;
}

/* Sidebar & Inputs */
.form-group {
    margin-bottom: 14px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.form-group-row {
    display: flex;
    gap: 10px;
}

.form-group-row .form-group {
    flex: 1;
}

.flex-2 { flex: 2 !important; }
.flex-1 { flex: 1 !important; }

label {
    font-size: 12.5px;
    font-weight: 500;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 4px;
}

input, select {
    background-color: var(--bg-main);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 8px 12px;
    font-family: var(--font-sans);
    font-size: 13.5px;
    transition: var(--transition);
    outline: none;
    width: 100%;
}

input:focus, select:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 2px var(--primary-glow);
}

.helper-text {
    font-size: 11px;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.id-hidden {
    display: none !important;
}

.dimensions-box {
    background: #ffffff;
    border: 1px solid var(--border-color);
    padding: 12px;
    border-radius: var(--radius-md);
    margin-bottom: 14px;
}

.dimensions-box .sub-title {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-bottom: 8px;
}

/* Buttons - Flat IDE style */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 600;
    padding: 8px 14px;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 2px 8px var(--primary-glow);
}

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

.btn-outline:hover {
    background-color: var(--bg-card);
    border-color: var(--text-secondary);
}

.btn-danger-outline {
    background-color: transparent;
    border-color: rgba(207, 34, 46, 0.2);
    color: var(--danger);
}

.btn-danger-outline:hover {
    background-color: rgba(207, 34, 46, 0.05);
    border-color: var(--danger);
}

.btn-sm {
    padding: 4px 8px;
    font-size: 11px;
}

.btn-block {
    width: 100%;
}

.calc-btn {
    margin-top: 10px;
    padding: 12px;
    font-size: 14px;
    background-color: var(--primary);
    color: white;
    border: none;
    box-shadow: 0 2px 8px var(--primary-glow);
}

/* Shield Rows Builder */
.shielding-section {
    border-top: 1px solid var(--border-color);
    margin-top: 16px;
    padding-top: 16px;
}

.shield-section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.shield-section-header h3 {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
}

.shields-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.shield-row {
    display: flex;
    gap: 8px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    padding: 8px;
    border-radius: var(--radius-md);
    align-items: flex-end;
}

.shield-row .form-group {
    margin-bottom: 0;
}

/* Results Section Dashboard */
.results-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Dashboard Statistics */
.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 16px;
}

@media (max-width: 768px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}

.metric-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 16px;
    display: flex;
    gap: 12px;
    align-items: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.metric-card:hover {
    border-color: var(--text-muted);
}

.main-metric {
    grid-column: span 1;
    background: linear-gradient(135deg, #fff2eb, var(--bg-card)); /* Replit Light Orange tint */
    border-left: 3px solid var(--primary);
}

.metric-icon {
    width: 40px;
    height: 40px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.metric-icon svg {
    width: 20px;
    height: 20px;
}

.metric-details {
    display: flex;
    flex-direction: column;
}

.metric-details h3 {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}

.metric-value {
    font-family: var(--font-mono);
    font-size: 32px;
    font-weight: 700;
    line-height: 1.1;
    color: var(--text-primary);
}

.metric-value-sub {
    font-family: var(--font-mono);
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.metric-unit {
    font-size: 11px;
    color: var(--text-muted);
}

/* Schematic Section */
.schematic-viewport {
    background: #f1f3f5;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow-x: auto;
    padding: 0 16px;
}

.schematic-container {
    display: flex;
    align-items: center;
    gap: 0;
    position: relative;
    min-width: 420px;
}

.schematic-source-placeholder {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    background: rgba(242, 92, 5, 0.05);
    border: 2px dashed var(--primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.geometry-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background-color: var(--primary);
    box-shadow: 0 0 8px var(--primary-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

/* Geometry Shapes */
.geom-point { width: 10px; height: 10px; border-radius: 50%; }
.geom-line { width: 4px; height: 26px; border-radius: 2px; }
.geom-disk { width: 6px; height: 26px; border-radius: 3px; }
.geom-cylinder { width: 20px; height: 30px; border-radius: 4px; }
.geom-sphere { width: 26px; height: 26px; border-radius: 50%; }
.geom-slab { width: 28px; height: 28px; border-radius: 3px; }

.schematic-label {
    font-size: 9px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* Radiation path line */
.schematic-container::before {
    content: '';
    position: absolute;
    left: 30px;
    right: 30px;
    height: 2px;
    background: repeating-linear-gradient(90deg, rgba(242, 92, 5, 0.08), rgba(242, 92, 5, 0.08) 6px, var(--primary) 6px, var(--primary) 12px);
    z-index: 2;
    animation: radiationFlow 3s linear infinite;
}

@keyframes radiationFlow {
    0% { background-position: 0 0; }
    100% { background-position: 60px 0; }
}

.schematic-shields-container {
    display: flex;
    gap: 3px;
    align-items: center;
    padding: 0 10px;
    flex-grow: 1;
    justify-content: center;
    height: 100px;
    z-index: 5;
}

.schematic-shield-band {
    height: 80px;
    min-width: 12px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    border: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
    transition: var(--transition);
}

.schematic-shield-band::after {
    content: attr(data-label);
    position: absolute;
    bottom: -15px;
    font-size: 8px;
    font-weight: 600;
    color: var(--text-secondary);
    white-space: nowrap;
}

.schematic-detector-placeholder {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    background: #ffffff;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.detector-icon {
    font-size: 16px;
}

.schematic-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 12px;
    justify-content: center;
    font-size: 10px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--text-secondary);
}

.legend-color {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-sm);
}

.color-source { background-color: var(--primary); }
.color-lead { background-color: #7b8394; }
.color-iron { background-color: #b06233; }
.color-water { background-color: #3b8cc4; }
.color-inox { background-color: #94a3b8; }
.color-resin { background-color: #d97706; }
.color-glasslead { background-color: #6d84a3; }
.color-glassboro { background-color: #8bb5d1; }
.color-glassplate { background-color: #8ab6a3; }
.color-glassquartz { background-color: #a8dadc; }
.color-glassfoam { background-color: #e5e7eb; }
.color-earth { background-color: #78350f; }
.color-brick { background-color: #b91c1c; }
.color-aluminium { background-color: #94a3b8; }
.color-copper { background-color: #ea580c; }
.color-air { background-color: rgba(255, 255, 255, 0.15); border: 1px dashed rgba(0, 0, 0, 0.25); }
.color-detector { background-color: #4b5563; }

/* Dynamic material classes mapped to bands */
.mat-Lead { background-color: #6c7585; color: #ffffff; }
.mat-Iron { background-color: #a15425; color: #ffffff; }
.mat-Water { background-color: #2e82b8; color: #ffffff; }
.mat-Inox { background-color: #7e8a9c; color: #ffffff; }
.mat-Resin { background-color: #f59e0b; color: #1e293b; }
.mat-GlassLead { background-color: #5c7493; color: #ffffff; }
.mat-GlassBorosilicate { background-color: #7ba6c2; color: #1e293b; }
.mat-GlassPlate { background-color: #79a693; color: #1e293b; }
.mat-GlassQuartz { background-color: #98cacf; color: #1e293b; }
.mat-GlassFoam { background-color: #d1d5db; border: 1px dotted #9ca3af; color: #1e293b; }
.mat-Earth { background-color: #5c2008; color: #ffffff; }
.mat-Brick { background-color: #991b1b; color: #ffffff; }
.mat-Aluminium { background-color: #cbd5e1; color: #1e293b; }
.mat-Copper { background-color: #ca8a04; color: #ffffff; }
.mat-Air { background-color: rgba(0, 0, 0, 0.02); border: 1px dashed rgba(0, 0, 0, 0.15); color: var(--text-primary); }

/* Chart Tabs styling */
.charts-card {
    display: flex;
    flex-direction: column;
}

/* Replit IDE style Code Editor Tabbed Header */
.charts-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 8px;
}

.tab-buttons {
    display: flex;
    gap: 2px;
    margin-bottom: -1px;
}

/* Replit flat tab editor style */
.tab-btn {
    border: 1px solid transparent;
    border-bottom: none;
    background: none;
    color: var(--text-secondary);
    padding: 8px 16px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    border-top-left-radius: var(--radius-md);
    border-top-right-radius: var(--radius-md);
    font-family: var(--font-sans);
    transition: var(--transition);
}

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

.tab-btn.active {
    background-color: var(--bg-card);
    color: var(--primary);
    border-color: var(--border-color);
    border-top: 2px solid var(--primary); /* Replit active top highlight line */
    font-weight: 600;
}

.chart-container {
    height: 300px;
    width: 100%;
    position: relative;
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 8px;
}

.chart-options {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
    font-size: 12px;
    color: var(--text-secondary);
}

.chart-options select {
    width: auto;
    padding: 4px 8px;
    font-size: 12px;
}

/* Footer style */
.app-footer {
    text-align: center;
    padding: 24px;
    font-size: 11px;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    margin-top: auto;
    font-family: var(--font-mono);
}

/* Data Table styles for gamma lines */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
    font-family: var(--font-sans);
    font-size: 13px;
}
.data-table th {
    padding: 8px 12px;
    border-bottom: 2px solid var(--border-color);
    color: var(--text-secondary);
    font-weight: 600;
    text-align: left;
}
.data-table td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}
.data-table tbody tr:hover {
    background-color: var(--bg-card);
}

/* Modal overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
    transition: var(--transition);
}

/* Modal Content */
.modal-content {
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 950px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow);
    animation: modalAppear 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalAppear {
    from {
        opacity: 0;
        transform: scale(0.96) translateY(8px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-header {
    padding: 14px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--bg-card);
    border-top-left-radius: var(--radius-lg);
    border-top-right-radius: var(--radius-lg);
}

.modal-header h2 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.modal-close-btn {
    background: none;
    border: none;
    font-size: 26px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    line-height: 1;
}

.modal-close-btn:hover {
    color: var(--danger);
}

.modal-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    overflow: hidden;
}

.modal-toolbar {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

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

.search-box {
    position: relative;
    flex: 1;
    max-width: 420px;
}

.search-box input {
    padding-left: 36px;
    font-size: 13px;
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 15px;
    height: 15px;
    color: var(--text-muted);
}

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

.tab-btn {
    background: none;
    border: none;
    padding: 6px 14px;
    font-size: 12px;
    font-family: var(--font-sans);
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

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

.tab-btn.active {
    background-color: var(--bg-main);
    color: var(--primary);
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
    font-weight: 600;
}

.modal-table-container {
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    max-height: 48vh;
    background-color: var(--bg-main);
}

.modal-table {
    width: 100%;
    border-collapse: collapse;
    font-family: var(--font-sans);
    font-size: 12.5px;
}

.modal-table th {
    position: sticky;
    top: 0;
    background-color: var(--bg-card);
    padding: 10px 14px;
    border-bottom: 2px solid var(--border-color);
    color: var(--text-secondary);
    font-weight: 600;
    text-align: left;
    z-index: 1;
}

.modal-table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    vertical-align: middle;
}

.modal-table tbody tr {
    transition: var(--transition);
}

.modal-table tbody tr:hover {
    background-color: var(--bg-card);
}

/* Category Badges */
.badge-category {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 9.5px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.badge-medical {
    background-color: rgba(9, 105, 218, 0.1);
    color: var(--accent);
}

.badge-civil {
    background-color: rgba(242, 92, 5, 0.1);
    color: var(--primary);
}

.badge-heavy {
    background-color: rgba(26, 127, 55, 0.1);
    color: var(--success);
}

/* Progeny / Decay Badges */
.badge-parent {
    background-color: rgba(139, 92, 246, 0.15);
    color: #a78bfa;
    border: 1px solid rgba(139, 92, 246, 0.25);
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 10px;
    font-weight: 600;
}

.badge-descendant {
    background-color: rgba(6, 182, 212, 0.15);
    color: #22d3ee;
    border: 1px solid rgba(6, 182, 212, 0.25);
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 10px;
    font-weight: 600;
}

.badge-stable {
    background-color: rgba(107, 114, 128, 0.15);
    color: #9ca3af;
    border: 1px solid rgba(107, 114, 128, 0.25);
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 10px;
    font-weight: 600;
}

.badge-nuclide {
    background-color: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
    border: 1px solid rgba(59, 130, 246, 0.25);
    display: inline-flex;
    align-items: center;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 11px;
    font-family: var(--font-mono);
    font-weight: 600;
}