/* FreightClass Flow - LTL Freight Density & Class Calculator */
/* Bespoke Industrial Warehouse Theme */

:root {
    --bg-primary: #0a0f1d;
    --bg-surface: #141c33;
    --bg-surface-hover: #1c2747;
    --bg-card: #18223d;
    --accent: #f59e0b;
    --accent-glow: rgba(245, 158, 11, 0.25);
    --accent-hover: #fbbf24;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: #233154;
    --border-focus: #f59e0b;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --pallet-wood: #d97706;
    --cargo-blue: #38bdf8;
    --airspace-red: rgba(239, 68, 68, 0.3);

    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-body);
    margin: 0;
    padding: 0;
    line-height: 1.5;
}

/* Header Styling */
.app-header {
    background: linear-gradient(180deg, rgba(20, 28, 51, 0.9) 0%, rgba(10, 15, 29, 0.95) 100%);
    border-bottom: 1px solid var(--border);
    padding: 2.5rem 1.5rem 2rem;
    text-align: center;
}

.header-content {
    max-width: 900px;
    margin: 0 auto;
}

.header-badge {
    display: inline-block;
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent);
    border: 1px solid rgba(245, 158, 11, 0.3);
    font-family: var(--font-body);
    font-size: 0.8125rem;
    font-weight: 600;
    padding: 0.35rem 0.85rem;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
}

.app-header h1 {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    margin: 0 0 0.5rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.app-header p {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin: 0;
}

/* Main Container */
.app-main {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1.5rem;
}

/* Calculator Main Workspace Grid */
.calculator-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

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

/* Panel Sections */
.input-panel, .results-panel {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
    flex-wrap: wrap;
    gap: 1rem;
}

.panel-header h2 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0;
    color: var(--text-primary);
}

/* Unit Toggle Buttons */
.unit-toggle-group {
    display: flex;
    background: var(--bg-primary);
    padding: 3px;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.unit-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-size: 0.8125rem;
    font-weight: 600;
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.unit-btn.active {
    background: var(--accent);
    color: #000;
    box-shadow: 0 2px 8px var(--accent-glow);
}

/* Form Controls */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.4rem;
}

.unit-label, .weight-unit-label {
    color: var(--text-muted);
    font-weight: 400;
    font-size: 0.8125rem;
}

.form-input {
    width: 100%;
    box-sizing: border-box;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 1rem;
    padding: 0.65rem 0.85rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.mini-input {
    width: 100px;
    padding: 0.4rem 0.6rem;
    display: inline-block;
}

/* Pallet Presets Grid */
.preset-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.65rem;
}

.preset-btn {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.75rem;
    text-align: left;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
}

.preset-btn strong {
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    color: var(--text-primary);
}

.preset-btn span {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.15rem;
}

.preset-btn:hover {
    background: var(--bg-surface-hover);
    border-color: var(--text-muted);
}

.preset-btn.active {
    background: rgba(245, 158, 11, 0.1);
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent);
}

.preset-btn.active strong {
    color: var(--accent);
}

/* Shape Radio Group */
.shape-toggle-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.65rem;
}

.shape-radio {
    cursor: pointer;
}

.shape-radio input {
    display: none;
}

.radio-card {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.75rem 0.85rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.shape-radio input:checked + .radio-card {
    background: rgba(245, 158, 11, 0.1);
    border-color: var(--accent);
    color: var(--accent);
}

/* Dimensions Grid */
.dimensions-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 0.75rem;
}

.dimensions-grid.hidden {
    display: none;
}

.form-row.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

/* Advanced Options Section */
.advanced-section {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    margin-top: 1rem;
}

.advanced-title {
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--accent);
    margin: 0 0 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.toggle-list {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    cursor: pointer;
}

.checkbox-label input {
    display: none;
}

.checkbox-custom {
    width: 18px;
    height: 18px;
    min-width: 18px;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 4px;
    margin-top: 2px;
    position: relative;
    transition: all 0.2s ease;
}

.checkbox-label input:checked + .checkbox-custom {
    background: var(--accent);
    border-color: var(--accent);
}

.checkbox-label input:checked + .checkbox-custom::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 4px;
    height: 9px;
    border: solid #000;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.checkbox-text {
    display: flex;
    flex-direction: column;
}

.checkbox-text strong {
    font-size: 0.875rem;
    color: var(--text-primary);
}

.checkbox-text span {
    font-size: 0.78125rem;
    color: var(--text-muted);
}

.sub-input-row {
    margin-left: 1.8rem;
    margin-top: -0.25rem;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Results Panel - Summary Cards Grid */
.summary-cards-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.result-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
}

.primary-card {
    grid-column: span 2;
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.12) 0%, rgba(20, 28, 51, 0.8) 100%);
    border: 1px solid var(--accent);
    box-shadow: 0 4px 16px rgba(245, 158, 11, 0.15);
    text-align: center;
    align-items: center;
}

.card-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}

.class-hero-display {
    display: flex;
    align-items: baseline;
    gap: 0.4rem;
    margin: 0.25rem 0;
}

.class-prefix {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.class-number {
    font-family: var(--font-mono);
    font-size: 3.25rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
}

.class-subtext {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.result-value-big {
    font-family: var(--font-mono);
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.1;
}

.result-value {
    font-family: var(--font-mono);
    font-size: 1.65rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.result-unit {
    font-size: 0.78125rem;
    color: var(--text-muted);
    margin-top: 0.2rem;
}

/* 3D Visualizer Card */
.visualizer-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem;
    margin-bottom: 1.25rem;
}

.visualizer-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.visualizer-header h3 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
    margin: 0;
    color: var(--text-primary);
}

.airspace-badge {
    font-family: var(--font-mono);
    font-size: 0.78125rem;
    font-weight: 600;
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.3);
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
}

.canvas-container {
    width: 100%;
    background: #070a14;
    border-radius: 8px;
    border: 1px solid var(--border);
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}

#palletCanvas {
    width: 100%;
    height: auto;
    max-height: 280px;
    display: block;
}

.canvas-legend {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 0.75rem;
    flex-wrap: wrap;
}

.legend-item {
    font-size: 0.78125rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.legend-swatch {
    width: 12px;
    height: 12px;
    border-radius: 3px;
    display: inline-block;
}

.cargo-swatch { background: var(--cargo-blue); }
.pallet-swatch { background: var(--pallet-wood); }
.bounding-swatch { border: 1px dashed var(--accent); background: rgba(245, 158, 11, 0.1); }
.air-swatch { background: var(--airspace-red); }

/* Bump Advisor Box */
.bump-advisor-card {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--success);
    border-radius: 10px;
    padding: 1rem;
    display: flex;
    gap: 0.85rem;
    align-items: flex-start;
    margin-bottom: 1.25rem;
}

.advisor-icon {
    font-size: 1.5rem;
    line-height: 1;
}

.advisor-content h4 {
    font-family: var(--font-heading);
    font-size: 0.9375rem;
    font-weight: 700;
    margin: 0 0 0.25rem;
    color: var(--success);
}

.advisor-content p {
    font-size: 0.875rem;
    color: var(--text-primary);
    margin: 0;
}

/* NMFC 18-Tier Matrix Ladder */
.nmfc-ladder-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1rem;
}

.nmfc-ladder-card h3 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
    margin: 0 0 0.85rem;
    color: var(--text-primary);
}

.ladder-container {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    max-height: 320px;
    overflow-y: auto;
    padding-right: 0.35rem;
}

/* Custom Scrollbar for Ladder */
.ladder-container::-webkit-scrollbar {
    width: 6px;
}

.ladder-container::-webkit-scrollbar-track {
    background: var(--bg-primary);
    border-radius: 3px;
}

.ladder-container::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

.ladder-tier {
    display: grid;
    grid-template-columns: 80px 1fr 140px;
    align-items: center;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.45rem 0.75rem;
    font-size: 0.8125rem;
    transition: all 0.2s ease;
}

.ladder-tier.active-tier {
    background: rgba(245, 158, 11, 0.15);
    border-color: var(--accent);
    box-shadow: 0 0 10px rgba(245, 158, 11, 0.2);
}

.ladder-class {
    font-family: var(--font-mono);
    font-weight: 700;
    color: var(--text-primary);
}

.ladder-tier.active-tier .ladder-class {
    color: var(--accent);
}

.ladder-range {
    color: var(--text-secondary);

}

.ladder-status {
    text-align: right;
    font-weight: 600;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.ladder-tier.active-tier .ladder-status {
    color: var(--accent);
    text-transform: uppercase;
}

/* Educational Content Section */
.educational-content {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 2.5rem 2rem;
    margin-top: 2.5rem;
    margin-bottom: 4rem;
}

.edu-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 2.5rem;
}

.edu-header h2 {
    font-family: var(--font-heading);
    font-size: 1.85rem;
    font-weight: 800;
    margin: 0 0 0.5rem;
    color: var(--text-primary);
}

.edu-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin: 0;
}

.edu-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

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

.edu-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.5rem;
}

.edu-card h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent);
    margin: 0 0 0.85rem;
}

.edu-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
    margin: 0 0 1rem;
}

.edu-card p:last-child {
    margin-bottom: 0;
}

.edu-card ul {
    margin: 0;
    padding-left: 1.25rem;
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.edu-card li {
    margin-bottom: 0.5rem;
}

.formula-box {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem;
    margin: 1rem 0;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--accent);
    text-align: center;
    overflow-x: auto;
}

/* NMFC Reference Table */
.table-container {
    overflow-x: auto;
}

.table-container h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 1rem;
}

.nmfc-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
    text-align: left;
}

.nmfc-table th, .nmfc-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
}

.nmfc-table th {
    background: var(--bg-card);
    color: var(--text-primary);
    font-family: var(--font-heading);
    font-weight: 700;
}

.nmfc-table td {
    color: var(--text-secondary);
}

.nmfc-table tr:hover td {
    background: rgba(245, 158, 11, 0.05);
    color: var(--text-primary);
}

/* Floating Action Bar */
.floating-action-bar {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 100;
}

.action-btn {
    background: var(--accent);
    color: #000;
    border: none;
    border-radius: 9999px;
    padding: 0.85rem 1.5rem;
    font-family: var(--font-body);
    font-size: 0.9375rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 8px 24px var(--accent-glow);
    transition: all 0.2s ease;
}

.action-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(245, 158, 11, 0.35);
}

.action-btn:active {
    transform: translateY(0);
}