/* ============================================
   Stockpile Volume Calculator - Styles
   ============================================ */

:root {
    /* Color Palette - Deep industrial theme */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a24;
    --bg-elevated: #22222e;
    
    --text-primary: #f0f0f5;
    --text-secondary: #9090a0;
    --text-muted: #606070;
    
    --accent-primary: #00d4aa;
    --accent-secondary: #00a888;
    --accent-glow: rgba(0, 212, 170, 0.3);
    
    --warning: #ffa726;
    --error: #ef5350;
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-focus: rgba(0, 212, 170, 0.5);
    
    /* Typography */
    --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    
    /* Sizing */
    --header-height: 64px;
    --panel-width: 320px;
    --border-radius: 8px;
    --border-radius-lg: 12px;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-display);
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
    background: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* App Layout */
#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background: 
        radial-gradient(ellipse at 20% 0%, rgba(0, 212, 170, 0.05) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 100%, rgba(0, 100, 180, 0.05) 0%, transparent 50%),
        var(--bg-primary);
}

/* Header */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    padding: 0 var(--space-lg);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--accent-primary);
}

.logo h1 {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.header-actions {
    display: flex;
    gap: var(--space-md);
}

/* Main Content */
.main {
    display: flex;
    flex-direction: row;
    flex: 1;
    overflow: hidden;
}

/* 3D Viewer */
#viewer-container {
    flex: 1;
    position: relative;
    background: var(--bg-primary);
    overflow: hidden;
}

#viewer {
    width: 100%;
    height: 100%;
    display: block;
}

.viewer-overlay {
    position: absolute;
    pointer-events: none;
}

#viewer-info {
    top: var(--space-md);
    left: var(--space-md);
    display: flex;
    gap: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-secondary);
}

.empty-state {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    color: var(--text-muted);
}

.empty-state svg {
    margin-bottom: var(--space-lg);
    opacity: 0.3;
}

.empty-state h2 {
    font-size: 20px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.empty-state p {
    font-size: 14px;
}

/* Control Panel */
.control-panel {
    width: var(--panel-width);
    flex-shrink: 0;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    padding: var(--space-lg);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.panel-section {
    background: var(--bg-tertiary);
    border-radius: var(--border-radius-lg);
    padding: var(--space-lg);
}

.panel-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: var(--space-md);
}

.control-group {
    margin-bottom: var(--space-md);
}

.control-group > label {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
}

.input-row {
    display: flex;
    gap: var(--space-sm);
}

.input-field {
    flex: 1;
    position: relative;
}

.input-label {
    position: absolute;
    left: var(--space-sm);
    top: 50%;
    transform: translateY(-50%);
    font-size: 10px;
    font-weight: 600;
    color: var(--text-muted);
    pointer-events: none;
}

.input-field input {
    width: 100%;
    padding: var(--space-sm) var(--space-sm) var(--space-sm) var(--space-lg);
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 13px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

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

.input-field input::-webkit-inner-spin-button,
.input-field input::-webkit-outer-spin-button {
    opacity: 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 500;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--accent-secondary);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-secondary {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-tertiary);
    border-color: var(--text-muted);
}

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

.btn-ghost:hover:not(:disabled) {
    background: var(--bg-elevated);
    color: var(--text-primary);
}

.btn-accent {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--bg-primary);
    font-weight: 600;
}

.btn-accent:hover:not(:disabled) {
    box-shadow: 0 4px 24px var(--accent-glow);
    transform: translateY(-1px);
}

.btn-large {
    width: 100%;
    padding: var(--space-md);
    font-size: 14px;
}

.button-row {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.button-row .btn {
    flex: 1;
}

/* Mode Buttons */
.mode-buttons {
    display: flex;
    gap: var(--space-xs);
}

.btn-mode {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-elevated);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    font-family: var(--font-display);
    font-size: 11px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-mode:hover {
    background: var(--bg-tertiary);
    border-color: var(--text-muted);
    color: var(--text-primary);
}

.btn-mode.active {
    background: rgba(0, 212, 170, 0.15);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.btn-mode svg {
    opacity: 0.7;
}

.btn-mode.active svg {
    opacity: 1;
}

/* Sliders */
.slider-row {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.slider-row input[type="range"] {
    flex: 1;
    height: 4px;
    background: var(--bg-elevated);
    border-radius: 2px;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.slider-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--accent-primary);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
}

.slider-row input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 10px var(--accent-glow);
}

.slider-row input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--accent-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

.slider-value {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-secondary);
    min-width: 45px;
    text-align: right;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.stat-item {
    background: var(--bg-elevated);
    border-radius: var(--border-radius);
    padding: var(--space-md);
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 10px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: var(--space-xs);
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

/* Checkbox - Override any other input styles */
.control-group .checkbox-label {
    display: flex !important;
    flex-direction: row !important;
    align-items: center !important;
    gap: 12px !important;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
    padding: 6px 0;
    margin-bottom: 0 !important;
}

/* Force checkbox to be visible and properly sized */
.control-group .checkbox-label input,
.control-group .checkbox-label input[type="checkbox"],
input[type="checkbox"]#clip-to-box,
input[type="checkbox"]#show-mesh,
input[type="checkbox"]#hide-point-cloud {
    -webkit-appearance: checkbox !important;
    -moz-appearance: checkbox !important;
    appearance: checkbox !important;
    display: inline-block !important;
    visibility: visible !important;
    opacity: 1 !important;
    position: static !important;
    width: 18px !important;
    height: 18px !important;
    min-width: 18px !important;
    min-height: 18px !important;
    max-width: 18px !important;
    max-height: 18px !important;
    flex: 0 0 18px !important;
    padding: 0 !important;
    margin: 0 !important;
    border: none !important;
    accent-color: #00d4aa;
    cursor: pointer;
    transform: scale(1.2);
}

/* Hide the custom span */
.checkbox-custom,
span.checkbox-custom {
    display: none !important;
    visibility: hidden !important;
    width: 0 !important;
    height: 0 !important;
}

/* Result Section */
.result-section {
    background: linear-gradient(135deg, rgba(0, 212, 170, 0.1), rgba(0, 100, 180, 0.1));
    border: 1px solid var(--accent-primary);
}

.result-display {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-lg) 0;
    margin-bottom: var(--space-md);
}

.result-value {
    font-family: var(--font-mono);
    font-size: 36px;
    font-weight: 600;
    color: var(--accent-primary);
    text-shadow: 0 0 30px var(--accent-glow);
}

.result-unit {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-secondary);
}

.result-details {
    background: var(--bg-elevated);
    border-radius: var(--border-radius);
    padding: var(--space-md);
}

.detail-row {
    display: flex;
    justify-content: space-between;
    padding: var(--space-xs) 0;
    font-size: 12px;
}

.detail-row span:first-child {
    color: var(--text-muted);
}

.detail-row span:last-child {
    font-family: var(--font-mono);
    color: var(--text-secondary);
}

/* Loading Overlay */
#loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 15, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.loader {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
}

.loader-ring {
    width: 48px;
    height: 48px;
    border: 3px solid var(--bg-tertiary);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loader-text {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-elevated);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Responsive */
@media (max-width: 600px) {
    .main {
        flex-direction: column;
    }
    
    .control-panel {
        width: 100%;
        max-height: 40vh;
        flex-shrink: 1;
        border-left: none;
        border-top: 1px solid var(--border-color);
    }
}