@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;500;600;700;800;900&family=Rajdhani:wght@300;400;500;600;700&family=Michroma&display=swap');

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

:root {
    /* Bad Ass Color Palette */
    --carbon-black: #0a0a0a;
    --midnight: #121212;
    --dark-chrome: #1a1a1a;
    --gunmetal: #2d2d2d;
    --titanium: #3e3e3e;
    --platinum: #e5e5e5;
    --silver: #a3a3a3;
    
    /* High-Energy Accent Colors */
    --racing-red: #ff003c;
    --racing-red-glow: #ff3b6b;
    --championship-gold: #ffc700;
    --gold-accent: #f59e0b;
    --torque-orange: #ff8c00; /* Vibrant Orange */
    --boost-blue: #00e5ff;
    --afr-purple: #c500ff;
    --success-green: #00ff87;
    --warning-amber: #f59e0b;
    --danger-red: #ef4444;
}

body {
    font-family: 'Rajdhani', sans-serif;
    background: var(--carbon-black);
    color: var(--platinum);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

/* Premium Background Effects */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(255, 0, 60, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 199, 0, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(0, 229, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 1;
}

/* Carbon Fiber Pattern Overlay */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.03;
    background-image: 
        repeating-linear-gradient(45deg, transparent, transparent 2px, rgba(255,255,255,.1) 2px, rgba(255,255,255,.1) 4px),
        repeating-linear-gradient(-45deg, transparent, transparent 2px, rgba(255,255,255,.05) 2px, rgba(255,255,255,.05) 4px);
    pointer-events: none;
    z-index: 1;
}

/* Navigation - Luxury Header */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: linear-gradient(to bottom, rgba(10, 10, 10, 0.98), rgba(10, 10, 10, 0.9));
    backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(251, 191, 36, 0.2);
    z-index: 1000;
    transition: all 0.3s ease;
}

nav::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--championship-gold), transparent);
    animation: shimmer 3s infinite;
}

@keyframes shimmer {
    0% { opacity: 0.3; }
    50% { opacity: 1; }
    100% { opacity: 0.3; }
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 2;
}

.logo img {
    height: 50px;
    width: auto;
}

@keyframes slideGradient {
    to { background-position: -200% 0; }
}

.nav-links {
    display: flex;
    gap: 3rem;
    align-items: center;
}

.nav-link {
    color: var(--silver);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--racing-red);
    transition: width 0.3s ease;
}

.nav-link:hover {
    color: var(--championship-gold);
}

.nav-link:hover::before {
    width: 100%;
}

/* Main Container */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    padding-top: 120px;
    position: relative;
    z-index: 2;
}

/* Hero Section - Luxury Performance */
.hero {
    padding: 5rem 0 3rem;
    text-align: center;
    position: relative;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.1), rgba(220, 38, 38, 0.1));
    border: 1px solid rgba(251, 191, 36, 0.3);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-size: 0.875rem;
    color: var(--championship-gold);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 3rem;
    position: relative;
    overflow: hidden;
}

.hero-badge::before {
    content: '';
    position: absolute;
    top: 50%;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(251, 191, 36, 0.3), transparent);
    animation: sweep 3s infinite;
}

@keyframes sweep {
    to { left: 100%; }
}

.hero-title {
    font-family: 'Michroma', sans-serif;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 400;
    line-height: 1.1;
    margin-bottom: 2rem;
    letter-spacing: -1px;
    position: relative;
}

.hero-title .accent {
    background: linear-gradient(135deg, var(--championship-gold), var(--racing-red));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--silver);
    max-width: 700px;
    margin: 0 auto 3rem;
    font-weight: 300;
    letter-spacing: 0.5px;
}

.about {
    max-width: 800px;
    margin: 2rem auto 3rem;
    text-align: center;
    color: var(--silver);
    line-height: 1.5;
}

/* Premium Stats Bar */
.stats-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2px;
    background: rgba(251, 191, 36, 0.1);
    padding: 2px;
    border-radius: 20px;
    margin-bottom: 4rem;
    position: relative;
    overflow: hidden;
}

.stats-bar::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(251, 191, 36, 0.1) 50%, transparent 70%);
    animation: shine 4s infinite;
}

@keyframes shine {
    0% { transform: translateX(-100%) skewX(-45deg); }
    100% { transform: translateX(200%) skewX(-45deg); }
}

.stat {
    background: var(--midnight);
    padding: 2.5rem 2rem;
    text-align: center;
    border-radius: 18px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.stat:hover {
    background: var(--dark-chrome);
    transform: translateY(-2px);
}

.stat-value {
    font-family: 'Orbitron', monospace;
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--championship-gold), var(--gold-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    letter-spacing: -1px;
}

.stat-label {
    color: var(--silver);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 600;
}

/* Upload Section - Premium Feel */
.upload-section {
    background: linear-gradient(135deg, var(--midnight), var(--dark-chrome));
    border: 1px solid rgba(251, 191, 36, 0.1);
    border-radius: 30px;
    padding: 4rem;
    margin-bottom: 4rem;
    position: relative;
    overflow: hidden;
}

.upload-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(251, 191, 36, 0.05) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

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

.section-header {
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
    z-index: 1;
}

.section-title {
    font-family: 'Orbitron', monospace;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-subtitle {
    color: var(--silver);
    font-size: 1.125rem;
}

/* Premium Upload Area */
.upload-area {
    background: linear-gradient(135deg, rgba(220, 38, 38, 0.05), rgba(251, 191, 36, 0.05));
    border: 2px dashed rgba(251, 191, 36, 0.3);
    border-radius: 20px;
    padding: 5rem 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.upload-area:hover {
    border-color: var(--championship-gold);
    background: linear-gradient(135deg, rgba(220, 38, 38, 0.1), rgba(251, 191, 36, 0.1));
    transform: scale(1.01);
}

.upload-area.dragover {
    border-color: var(--racing-red);
    background: rgba(220, 38, 38, 0.1);
    transform: scale(1.02);
}

.upload-icon {
    width: 100px;
    height: 100px;
    margin: 0 auto 2rem;
    background: linear-gradient(135deg, var(--racing-red), var(--championship-gold));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    position: relative;
    box-shadow: 0 0 50px rgba(251, 191, 36, 0.3);
}

.upload-icon::after {
    content: '';
    position: absolute;
    inset: -10px;
    background: linear-gradient(135deg, var(--racing-red), var(--championship-gold));
    border-radius: 50%;
    opacity: 0.3;
    filter: blur(20px);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.1); opacity: 0.5; }
}

.upload-text {
    font-family: 'Orbitron', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.upload-subtext {
    color: var(--silver);
    font-size: 1rem;
}

.file-info {
    margin-top: 1.5rem;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, rgba(34, 197, 94, 0.1), rgba(34, 197, 94, 0.05));
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: 10px;
    color: var(--success-green);
    font-weight: 600;
    display: inline-block;
}

/* Configuration Form - Luxury Inputs */
.config-section {
    margin-top: 3rem;
    display: none;
    position: relative;
    z-index: 1;
}

.config-section.show {
    display: block;
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.form-group {
    background: linear-gradient(135deg, var(--dark-chrome), var(--midnight));
    border: 1px solid rgba(251, 191, 36, 0.1);
    border-radius: 15px;
    padding: 2rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.form-group::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--championship-gold), transparent);
    transition: left 0.5s ease;
}

.form-group:hover::before {
    left: 100%;
}

.form-group:hover {
    border-color: rgba(251, 191, 36, 0.3);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(251, 191, 36, 0.1);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--championship-gold);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

.form-input {
    width: 100%;
    padding: 1rem 1.25rem;
    background: var(--carbon-black);
    border: 1px solid rgba(251, 191, 36, 0.2);
    border-radius: 10px;
    color: var(--platinum);
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
    font-family: 'Rajdhani', sans-serif;
}

.form-input:focus {
    outline: none;
    border-color: var(--championship-gold);
    box-shadow: 0 0 20px rgba(251, 191, 36, 0.2);
    background: var(--midnight);
}

select.form-input {
    cursor: pointer;
}

.input-group {
    position: relative;
}

.tire-size-display {
    position: absolute;
    right: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--championship-gold);
    font-weight: 600;
    font-size: 1rem;
    pointer-events: none;
}

.input-description {
    font-size: 0.8rem;
    color: var(--silver);
    margin-top: 0.75rem;
    padding: 0 0.5rem;
}

/* SAE Correction Controls */
.sae-controls {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.05), rgba(14, 165, 233, 0.02));
    border: 1px solid rgba(14, 165, 233, 0.2);
    border-radius: 15px;
    padding: 1rem;
    margin-bottom: 1.5rem;
}

.sae-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.sae-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--boost-blue);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.toggle-switch {
    position: relative;
    width: 60px;
    height: 30px;
    cursor: pointer;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    inset: 0;
    background: var(--gunmetal);
    border-radius: 30px;
    transition: all 0.3s ease;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 22px;
    width: 22px;
    left: 4px;
    bottom: 4px;
    background: var(--silver);
    border-radius: 50%;
    transition: all 0.3s ease;
}

input:checked + .toggle-slider {
    background: linear-gradient(135deg, var(--boost-blue), var(--racing-red));
}

input:checked + .toggle-slider::before {
    transform: translateX(30px);
    background: white;
}

#saeInputs {
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

/* Analyze Button - Premium CTA */
.analyze-section {
    text-align: center;
    margin-top: 3rem;
}

.btn {
    padding: 1.25rem 4rem;
    font-size: 1.25rem;
    font-weight: 700;
    font-family: 'Orbitron', monospace;
    text-transform: uppercase;
    letter-spacing: 2px;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    display: inline-block;
    color: white;
}

.btn-primary {
    background: linear-gradient(135deg, var(--racing-red), var(--championship-gold));
    color: black;
    box-shadow: 0 10px 30px rgba(220, 38, 38, 0.3);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(220, 38, 38, 0.4);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* Modal Styles - ADDED */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9998;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: linear-gradient(135deg, var(--dark-chrome), var(--midnight));
    border: 1px solid rgba(251, 191, 36, 0.2);
    border-radius: 20px;
    padding: 3rem 4rem;
    width: 90%;
    max-width: 700px;
    text-align: center;
    transform: scale(0.95);
    transition: transform 0.3s ease;
}

.modal-overlay.show .modal-content {
    transform: scale(1);
}

.modal-title {
    font-family: 'Orbitron', monospace;
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--championship-gold);
}

.modal-description {
    color: var(--silver);
    font-size: 1.125rem;
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

.modal-actions {
    margin-top: 2rem;
}

/* Loading Overlay - Premium */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-content {
    text-align: center;
    position: relative;
}

.spinner {
    width: 80px;
    height: 80px;
    border: 3px solid rgba(251, 191, 36, 0.1);
    border-top-color: var(--championship-gold);
    border-right-color: var(--racing-red);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 2rem;
}

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

.loading-text {
    font-family: 'Orbitron', monospace;
    font-size: 1.5rem;
    color: var(--platinum);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 2rem;
}

.loading-steps {
    text-align: left;
    display: inline-block;
}

.loading-step {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 0.75rem 0;
    color: var(--silver);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.loading-step.active {
    color: var(--championship-gold);
    transform: translateX(10px);
}

.loading-step.complete {
    color: var(--success-green);
}

.loading-step.complete::before {
    content: '✓';
    color: var(--success-green);
}

/* Results Section - Premium Display */
.results-section {
    display: none;
    margin-top: 4rem;
    animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.results-header {
    text-align: center;
    margin-bottom: 2rem; /* Reduced margin */
}

.power-gain {
    font-family: 'Orbitron', monospace;
    font-size: 4rem;
    font-weight: 900;
    background: linear-gradient(135deg, var(--success-green), var(--championship-gold));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 1.5rem 0;
    letter-spacing: -2px;
}

/* Dyno Chart Container - Premium */
.dyno-container {
    background: linear-gradient(135deg, var(--midnight), var(--dark-chrome));
    border: 1px solid rgba(251, 191, 36, 0.1);
    border-radius: 25px;
    padding: 3rem;
    margin-bottom: 4rem;
    position: relative;
    overflow: hidden;
}

.dyno-container::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(220, 38, 38, 0.05) 0%, transparent 70%);
    animation: rotate 30s linear infinite reverse;
}

.secondary-analysis-section {
    text-align: center;
    margin-bottom: 4rem;
}

.chart-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
}

.chart-controls label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--silver);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.875rem;
    cursor: pointer;
    transition: color 0.3s ease;
}

.chart-controls label:hover {
    color: var(--platinum);
}

.chart-controls input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--championship-gold);
}

.chart-controls select {
    background: var(--dark-chrome);
    border: 1px solid rgba(251, 191, 36, 0.2);
    border-radius: 8px;
    color: var(--platinum);
    padding: 0.5rem 1rem;
    font-family: 'Rajdhani', sans-serif;
    font-weight: 600;
    cursor: pointer;
}

#dynoChart {
    width: 100%;
    height: auto;
    min-height: 400px;
    position: relative;
    z-index: 1;
    background: var(--carbon-black);
    border-radius: 15px;
    padding: 20px;
}

#dynoChart svg {
    max-width: 100%;
    height: auto;
}

/* Analysis Cards - Premium */
.analysis-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.analysis-card {
    background: linear-gradient(135deg, var(--midnight), var(--dark-chrome));
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.analysis-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    transition: all 0.3s ease;
}

.analysis-card.good::before {
    background: var(--success-green);
    box-shadow: 0 0 20px rgba(0, 255, 135, 0.5);
}

.analysis-card.warning::before {
    background: var(--warning-amber);
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.5);
}

.analysis-card.danger::before {
    background: var(--danger-red);
    box-shadow: 0 0 20px rgba(239, 68, 68, 0.5);
}

.analysis-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.analysis-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.analysis-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: bold;
}

.analysis-card.good .analysis-icon {
    background: rgba(0, 255, 135, 0.2);
    color: var(--success-green);
    box-shadow: 0 0 15px rgba(0, 255, 135, 0.3);
}

.analysis-card.warning .analysis-icon {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning-amber);
    box-shadow: 0 0 15px rgba(245, 158, 11, 0.3);
}

.analysis-card.danger .analysis-icon {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-red);
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.3);
}

.analysis-value {
    font-family: 'Orbitron', monospace;
    font-size: 2.5rem;
    font-weight: 800;
    margin: 1rem 0;
    letter-spacing: -1px;
}

.analysis-description {
    color: var(--silver);
    font-size: 1rem;
    line-height: 1.6;
}

/* Tune Health Section */
#tuneHealthSection {
    display: none; /* Hidden by default */
    margin-top: 4rem;
}

/* NEW: Health Grade Styles - ADDED */
.health-grade-container {
    background: linear-gradient(135deg, var(--midnight), var(--dark-chrome));
    border: 1px solid rgba(251, 191, 36, 0.1);
    border-radius: 25px;
    padding: 3rem;
    margin-bottom: 4rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.grade-label {
    font-family: 'Orbitron', monospace;
    font-size: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--championship-gold);
}

.grade-circle {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Michroma', sans-serif;
    font-size: 5rem;
    font-weight: bold;
    color: var(--carbon-black);
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
    border: 5px solid rgba(255,255,255,0.8);
    transition: all 0.4s ease;
}

.grade-circle.grade-a, .grade-circle.grade-b {
    background: linear-gradient(135deg, var(--success-green), #00c96e);
    box-shadow: 0 0 40px var(--success-green);
}

.grade-circle.grade-c {
    background: linear-gradient(135deg, var(--warning-amber), #ffc107);
    box-shadow: 0 0 40px var(--warning-amber);
}

.grade-circle.grade-d, .grade-circle.grade-f {
    background: linear-gradient(135deg, var(--danger-red), #ff4d4d);
    box-shadow: 0 0 40px var(--danger-red);
}

.grade-remarks {
    font-size: 1.125rem;
    color: var(--silver);
    max-width: 600px;
}

#fuelTrimChart {
    width: 100%;
    height: auto;
    min-height: 400px;
    background: var(--carbon-black);
    border-radius: 15px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

#fuelTrimChart svg {
    max-width: 100%;
    height: auto;
}

#knockEventsTable {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}
#knockEventsTable th, #knockEventsTable td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid rgba(251, 191, 36, 0.1);
}
#knockEventsTable th {
    color: var(--championship-gold);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-size: 0.875rem;
}
#knockEventsTable td {
    font-family: 'Orbitron', monospace;
}

/* CTA Section - Luxury */
.cta-section {
    background: linear-gradient(135deg, rgba(220, 38, 38, 0.05), rgba(251, 191, 36, 0.05));
    border: 2px solid rgba(251, 191, 36, 0.2);
    border-radius: 30px;
    padding: 4rem;
    text-align: center;
    margin-top: 4rem;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -100%;
    left: -100%;
    width: 300%;
    height: 300%;
    background: radial-gradient(circle, rgba(251, 191, 36, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

.cta-title {
    font-family: 'Orbitron', monospace;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    z-index: 1;
}

.cta-subtitle {
    color: var(--silver);
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    position: relative;
    z-index: 1;
}

.cta-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.btn-secondary {
    background: transparent;
    color: var(--championship-gold);
    border: 2px solid var(--championship-gold);
    padding: 1.25rem 3rem;
    font-size: 1.125rem;
    font-weight: 700;
    font-family: 'Orbitron', monospace;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: var(--championship-gold);
    color: var(--carbon-black);
    box-shadow: 0 10px 30px rgba(251, 191, 36, 0.3);
}

/* Baseline Request Message */
.baseline-message {
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.1), rgba(245, 158, 11, 0.05));
    border: 1px solid rgba(245, 158, 11, 0.3);
    border-radius: 10px;
    padding: 1.5rem;
    margin: 2rem 0;
    text-align: center;
    color: var(--warning-amber);
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.baseline-message button {
    margin-top: 1rem;
    background: var(--warning-amber);
    color: var(--carbon-black);
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 25px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.baseline-message button:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 20px rgba(245, 158, 11, 0.4);
}

/* Footer - Minimal Luxury */
footer {
    margin-top: 8rem;
    padding: 3rem 0;
    border-top: 1px solid rgba(251, 191, 36, 0.1);
    text-align: center;
    color: var(--silver);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    position: relative;
    z-index: 2;
}

/* --- UPGRADED CHAT ASSISTANT STYLES --- */
#chatAssistant {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 380px; 
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(15px);
    border-radius: 20px;
    border: 1px solid rgba(251, 191, 36, 0.2);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    z-index: 1001;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease-in-out;
    overflow: hidden;
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem;
    background: rgba(255,255,255,0.05);
    cursor: pointer;
}

.chat-title {
    font-family: 'Orbitron', monospace;
    font-weight: 600;
    color: var(--championship-gold);
}

#minimizeChatBtn {
    background: none;
    border: none;
    color: var(--silver);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem;
    line-height: 1;
}

.chat-body {
    padding: 0 1.5rem 1.5rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

#chatAssistant.minimized {
    height: 55px;
    width: 250px;
}

#chatAssistant.minimized .chat-body {
    display: none;
}


#chatBox {
    width: 100%;
    height: 300px;
    background: var(--midnight);
    color: var(--platinum);
    border: 1px solid rgba(251, 191, 36, 0.2);
    border-radius: 10px;
    padding: 1rem;
    font-family: 'Rajdhani', sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    resize: none;
}

.chat-input-area {
    display: flex;
    gap: 1rem;
}

#chatInput {
    flex: 1;
    padding: 0.75rem 1rem;
    border-radius: 10px;
    border: 1px solid rgba(251, 191, 36, 0.2);
    background: var(--carbon-black);
    color: var(--platinum);
    font-family: 'Rajdhani', sans-serif;
    font-size: 1rem;
}
#chatInput:focus {
    outline: none;
    border-color: var(--championship-gold);
    box-shadow: 0 0 15px rgba(251, 191, 36, 0.3);
}

#chatSend {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 10px;
    background: var(--racing-red);
    color: white;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s ease;
}
#chatSend:hover {
    background: var(--racing-red-glow);
    transform: scale(1.05);
    box-shadow: 0 5px 20px rgba(255, 0, 60, 0.4);
}

/* Comparison buttons container */
#comparisonButtonsContainer {
    text-align: center;
    margin-top: 2rem;
    padding: 1rem;
}

#selectComparisonBtn,
#loadBothRunsBtn,
#clearAllDataBtn {
    margin: 0 0.5rem;
}

#toggleComparisonContainer {
    display: inline-flex;
    align-items: center;
    margin-left: 1rem;
    color: var(--silver);
}

/* Remove old comparison upload section styles if they exist */
.comparison-upload-section,
.comparison-upload,
#comparisonUploadSection {
    display: none !important;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .stats-bar {
        grid-template-columns: 1fr;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }

    .upload-section {
        padding: 2rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }

    #chatAssistant {
        display: none;
    }
}