/* =====================================================
   LidarAlign.com - Main Stylesheet
   Sensor Calibration & Alignment Technology Theme
   ===================================================== */

/* CSS Variables - Custom color scheme for LidarAlign */
:root {
    /* Primary Colors - Blue/Cyan theme for precision */
    --primary-color: #00a8ff;
    --primary-dark: #0084cc;
    --primary-light: #4fc3ff;
    --accent-color: #00ffcc;
    --accent-dark: #00ccaa;
    
    /* Background Colors - Same as LaneDetect */
    --bg-primary: #0a0f1c;
    --bg-secondary: #111827;
    --bg-card: #1a2332;
    --bg-card-hover: #1f2937;
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    /* Border Colors */
    --border-color: #2d3748;
    --border-light: #374151;
    
    /* Gradient Colors - Unique to LidarAlign */
    --gradient-start: #00a8ff;
    --gradient-end: #00ffcc;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 168, 255, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 168, 255, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 168, 255, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 168, 255, 0.1);
    
    /* Animation */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--primary-light);
}

/* Navigation Header */
.nav-header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 15, 28, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all var(--transition-base);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo {
    width: 32px;
    height: 32px;
}

.brand-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.gradient-text {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
    align-items: center;
}

.nav-menu a {
    color: var(--text-secondary);
    font-weight: 500;
    transition: color var(--transition-base);
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.btn-nav-cta {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: var(--text-primary) !important;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.btn-nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-base);
}

/* Hero Section */
.hero {
    padding: calc(80px + var(--spacing-3xl)) 0 var(--spacing-3xl);
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    position: relative;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    line-height: 1.1;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

/* Buttons */
.btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-block;
    text-align: center;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: var(--text-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-cta {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: var(--text-primary);
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1.125rem;
}

.hero-stats-center {
    display: flex;
    justify-content: center;
    gap: var(--spacing-3xl);
    margin-top: var(--spacing-xl);
    padding: var(--spacing-xl) 0;
    width: 100%;
}

.hero-stats-center .stat {
    display: flex;
    flex-direction: column;
    align-items: center;  /* Add this to center content */
    gap: var(--spacing-xs);
    text-align: center;   /* Add this for text centering */
}

.stat {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    display: block;        /* Add this */
    text-align: center;    /* Add this */
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    display: block;        /* Add this */
    text-align: center;    /* Add this */
}

.hero-visual .result-recommendation {
    position: relative;  /* Changed from default */
    margin-top: var(--spacing-lg);  /* Increased from md */
    padding: var(--spacing-lg);  /* Increased padding */
    background: rgba(26, 35, 50, 0.95);  /* Slightly more opaque */
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    font-size: 0.875rem;
    line-height: 1.6;
    z-index: 10;  /* Add this to ensure it's on top */
}

.hero-visual {
    position: relative;
    height: auto;  /* Changed from 500px */
    min-height: 500px;  /* Add minimum height */
    max-height: 650px;  /* Increased from 500px */
    overflow: visible;  /* Changed from hidden */
    padding-bottom: var(--spacing-lg);  /* Add padding at bottom */
}

.alignment-visualization {
    width: 100%;
    height: 450px;  /* Fixed height instead of 100% */
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
    perspective: 1000px;
}

/* 3D Coordinate System */
.coordinate-system {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotateX(20deg) rotateY(-30deg);
    width: 300px;
    height: 300px;
    transform-style: preserve-3d;
}

.axis {
    position: absolute;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    transform-origin: 0 0;
}

.x-axis {
    width: 150px;
    height: 2px;
    background: #ff4444;
}

.y-axis {
    width: 2px;
    height: 150px;
    background: #44ff44;
}

.z-axis {
    width: 2px;
    height: 150px;
    background: #4444ff;
    transform: rotateX(90deg);
}

/* Sensor Representations */
.sensor {
    position: absolute;
    animation: float 6s ease-in-out infinite;
}

.sensor-body {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

.lidar-sensor {
    top: 20%;
    left: 20%;
}

.camera-sensor {
    top: 20%;
    right: 20%;
}

.imu-sensor {
    bottom: 30%;
    left: 50%;
    transform: translateX(-50%);
}

.sensor-label {
    position: absolute;
    bottom: -25px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

/* Calibration Status */
.calibration-status {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    background: rgba(26, 35, 50, 0.9);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.status-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-color);
    animation: pulse 2s infinite;
}

.status-metrics {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.metric {
    display: flex;
    justify-content: space-between;
    font-size: 0.875rem;
}

.metric-label {
    color: var(--text-muted);
}

.metric-value {
    color: var(--primary-color);
    font-weight: 600;
}

/* Sections */
.section-title {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-2xl);
}

/* Value Proposition */
.value-prop {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-secondary);
    margin-top: var(--spacing-3xl);  /* Add this line for spacing */
    position: relative;  /* Add this to ensure proper stacking */
    z-index: 1;  /* Add this to ensure it appears above hero elements */
}

.value-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.value-card {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.value-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.value-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-md);
}

.value-icon img {
    width: 100%;
    height: 100%;
    filter: brightness(0) saturate(100%) invert(58%) sepia(87%) saturate(1419%) hue-rotate(173deg) brightness(102%) contrast(101%);
}

/* Technology Section */
.tech-section {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-primary);
}

.tech-accordion {
    max-width: 900px;
    margin: 0 auto;
}

.accordion-item {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.accordion-header {
    padding: var(--spacing-lg);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background var(--transition-base);
}

.accordion-header:hover {
    background: var(--bg-card-hover);
}

.accordion-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: transform var(--transition-base);
}

.accordion-item.active .accordion-icon {
    transform: rotate(45deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.accordion-item.active .accordion-content {
    max-height: 1000px;
}

.tech-detail {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.tech-detail h4 {
    color: var(--primary-color);
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.tech-detail ul {
    list-style: none;
    padding-left: 0;
}

.tech-detail li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--text-secondary);
}

.tech-detail li::before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--accent-color);
}

/* Calculator Section */
.calculator-section {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-secondary);
}

.calculator-widget {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    border: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
}

.calc-inputs {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.input-group label {
    font-weight: 500;
    color: var(--text-secondary);
}

.input-group input[type="range"] {
    width: 100%;
    height: 6px;
    background: var(--border-color);
    border-radius: var(--radius-sm);
    outline: none;
    -webkit-appearance: none;
}

.input-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
}

.input-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.input-group select {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    cursor: pointer;
}

.input-value {
    color: var(--primary-color);
    font-weight: 600;
}

.calc-results {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.result-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.result-item {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.result-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.result-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.result-recommendation {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--primary-color);
}

/* Before/After Slider */
.before-after-demo {
    margin-top: var(--spacing-2xl);
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.slider-container {
    position: relative;
    height: 400px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.before-image,
.after-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.before-image {
    background: linear-gradient(45deg, #ff4444, #ff6666);
    clip-path: polygon(0 0, 50% 0, 50% 100%, 0 100%);
}

.after-image {
    background: linear-gradient(45deg, var(--primary-color), var(--accent-color));
}

.slider-handle {
    position: absolute;
    top: 0;
    left: 50%;
    width: 4px;
    height: 100%;
    background: white;
    cursor: ew-resize;
    transform: translateX(-50%);
}

.slider-handle::before {
    content: "◀ ▶";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    color: var(--bg-primary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    white-space: nowrap;
}

/* Pattern Generator Section */
.pattern-section {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-primary);
}

.pattern-generator {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.generator-controls {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.control-group {
    flex: 1;
}

.control-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.control-group select {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
}

.btn-generate {
    align-self: flex-end;
    background: var(--primary-color);
    color: var(--text-primary);
}

.pattern-display {
    text-align: center;
}

#pattern-canvas {
    width: 100%;
    height: 400px;
    background: white;
    box-shadow: 0 1px 2px rgba(0,0,0,.08);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

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

/* Applications Section */
.applications {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-secondary);
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.app-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
}

.app-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.app-badge {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: var(--text-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.app-features {
    list-style: none;
    margin-top: var(--spacing-md);
}

.app-features li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    padding-left: var(--spacing-lg);
    position: relative;
}

.app-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent-color);
}

/* Resources Section */
.resources {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-primary);
}

.resource-tabs {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--border-color);
}

.tab-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    padding: var(--spacing-md) var(--spacing-lg);
    background: none;
    border: none;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    position: relative;
    transition: color var(--transition-base);
}

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

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

.tab-btn.active::after {
    content: "";
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary-color);
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
}

.resource-list {
    list-style: none;
}

.resource-list li {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--border-color);
}

.resource-list li:last-child {
    border-bottom: none;
}

.resource-list h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.resource-list p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.resource-meta {
    display: inline-block;
    background: var(--bg-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* CTA Section */
.cta-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
}

.cta-content {
    text-align: center;
    background: var(--bg-card);
    padding: var(--spacing-3xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    margin-bottom: var(--spacing-2xl);
}

.cta-features {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin: var(--spacing-xl) 0;
}

.cta-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
}

.cta-feature svg {
    color: var(--accent-color);
}

/* Network Box */
.network-box {
    background: var(--bg-card);
    padding: var(--spacing-3xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-align: center;
}

.network-domains {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin: var(--spacing-2xl) 0;
}

.domain-card {
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-base);
    text-decoration: none;
    display: block;
}

.domain-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.domain-card.current {
    border-color: var(--primary-color);
    background: linear-gradient(135deg, rgba(0, 168, 255, 0.1), rgba(0, 255, 204, 0.1));
}

.domain-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-md);
}

.domain-icon img {
    width: 100%;
    height: 100%;
    filter: brightness(0) saturate(100%) invert(58%) sepia(87%) saturate(1419%) hue-rotate(173deg) brightness(102%) contrast(101%);
}

.domain-card h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.domain-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.domain-status,
.domain-link {
    font-size: 0.875rem;
    font-weight: 600;
}

.domain-status {
    color: var(--accent-color);
}

.domain-link {
    color: var(--primary-color);
}

.network-cta {
    margin-top: var(--spacing-xl);
}

/* Footer */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-2xl) 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand h4,
.footer-links h4,
.footer-legal h4,
.footer-network h4 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
}

.footer-links ul,
.footer-legal ul,
.footer-network ul {
    list-style: none;
}

.footer-links li,
.footer-legal li,
.footer-network li {
    margin-bottom: var(--spacing-sm);
}

.footer-links a,
.footer-legal a,
.footer-network a {
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: color var(--transition-base);
}

.footer-links a:hover,
.footer-legal a:hover,
.footer-network a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.75rem;
    text-align: center;
    line-height: 1.6;
}

/* Disclaimer Boxes */
.calculator-disclaimer {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: rgba(255, 168, 0, 0.1);
    border: 1px solid rgba(255, 168, 0, 0.3);
    border-radius: var(--radius-md);
}

.calculator-disclaimer p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 0;
}

/* Animations */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

@keyframes pulse {
    0% {
        opacity: 1;
        box-shadow: 0 0 0 0 rgba(0, 255, 204, 0.7);
    }
    70% {
        opacity: 1;
        box-shadow: 0 0 0 10px rgba(0, 255, 204, 0);
    }
    100% {
        opacity: 1;
        box-shadow: 0 0 0 0 rgba(0, 255, 204, 0);
    }
}

@keyframes scan {
    0% {
        transform: translateY(0);
    }
    100% {
        transform: translateY(100%);
    }
}

@keyframes rotate3d {
    0% {
        transform: translate(-50%, -50%) rotateX(20deg) rotateY(-30deg);
    }
    100% {
        transform: translate(-50%, -50%) rotateX(20deg) rotateY(330deg);
    }
}

/* Sensor Animation Specific */
.sensor-rays {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 200px;
    height: 200px;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.sensor-rays::before,
.sensor-rays::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: pulse 3s infinite;
}

.sensor-rays::after {
    animation-delay: 1.5s;
}

.sensor-fov {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 150px;
    height: 150px;
    transform: translate(-50%, -50%);
    background: conic-gradient(
        from 0deg at 50% 50%,
        transparent 0deg,
        rgba(0, 168, 255, 0.2) 60deg,
        rgba(0, 168, 255, 0.4) 90deg,
        rgba(0, 168, 255, 0.2) 120deg,
        transparent 180deg
    );
    clip-path: polygon(50% 50%, 0% 0%, 100% 0%);
    animation: rotate3d 10s linear infinite;
}

.point-cloud .point {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent-color);
    border-radius: 50%;
    animation: float 4s ease-in-out infinite;
}

.point-cloud .point:nth-child(1) { top: 20%; left: 30%; animation-delay: 0s; }
.point-cloud .point:nth-child(2) { top: 30%; left: 60%; animation-delay: 0.5s; }
.point-cloud .point:nth-child(3) { top: 50%; left: 40%; animation-delay: 1s; }
.point-cloud .point:nth-child(4) { top: 70%; left: 70%; animation-delay: 1.5s; }
.point-cloud .point:nth-child(5) { top: 40%; left: 20%; animation-delay: 2s; }
.point-cloud .point:nth-child(6) { top: 60%; left: 80%; animation-delay: 2.5s; }
.point-cloud .point:nth-child(7) { top: 80%; left: 50%; animation-delay: 3s; }
.point-cloud .point:nth-child(8) { top: 25%; left: 75%; animation-delay: 3.5s; }

/* Alignment Indicators */
.alignment-indicator {
    position: absolute;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.alignment-indicator.misaligned {
    top: 40%;
    left: 10%;
}

.alignment-indicator.aligned {
    bottom: 40%;
    right: 10%;
}

.indicator-line {
    width: 50px;
    height: 2px;
    position: relative;
}

.alignment-indicator.misaligned .indicator-line {
    background: linear-gradient(90deg, #ff4444, #ff6666);
    transform: rotate(15deg);
}

.alignment-indicator.aligned .indicator-line {
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
}

.indicator-label {
    font-size: 0.75rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    background: rgba(26, 35, 50, 0.9);
    border: 1px solid var(--border-color);
}

/* Calibration Pattern Grid */
.calibration-pattern {
    position: absolute;
    bottom: 10%;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 100px;
}

.pattern-grid {
    width: 100%;
    height: 100%;
    background-image: 
        repeating-linear-gradient(0deg, transparent, transparent 19px, var(--border-color) 19px, var(--border-color) 20px),
        repeating-linear-gradient(90deg, transparent, transparent 19px, var(--border-color) 19px, var(--border-color) 20px);
    opacity: 0.3;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }
.p-4 { padding: var(--spacing-xl); }

/* Loading States */
.loading {
    position: relative;
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--primary-color);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Accessibility */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus Styles */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

button:focus,
a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* === Calculator: force dark dropdown panel & options === */
.calculator-section {
  /* Hint to browsers to render native form controls in dark mode, including the opened list */
  color-scheme: dark;
}

/* Make the popup list items dark (Chromium/Firefox honor this) */
.calculator-section .input-group select option,
.calculator-section .input-group select optgroup {
  background-color: var(--bg-card);
  color: var(--text-primary);
}

/* Hover/selected row states inside the opened list */
.calculator-section .input-group select option:hover,
.calculator-section .input-group select option:checked {
  background-color: var(--bg-card-hover);
  color: var(--text-primary);
}


/* Print Styles */
@media print {
    .nav-header,
    .footer,
    .btn,
    .calculator-section,
    .pattern-section {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}

/* Selection Styles */
::selection {
    background: var(--primary-color);
    color: var(--text-primary);
}

::-moz-selection {
    background: var(--primary-color);
    color: var(--text-primary);
}