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

:root {
    --car-red: #dc2626;
    --car-dark: #1a1a1a;
    --car-silver: #cbd5e1;
    --car-chrome: #e5e7eb;
    --car-black: #0a0a0a;
    --car-white: #ffffff;
    --car-gray: #4b5563;
    --car-light-gray: #f3f4f6;
    --accent-orange: #f97316;
    --accent-blue: #3b82f6;
}

body {
    font-family: 'Arial', 'Helvetica', sans-serif;
    line-height: 1.7;
    color: var(--car-black);
    background: linear-gradient(180deg, #fafafa 0%, #e5e7eb 100%);
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 30px;
}

/* Header - Automotive Style */
header {
    background: linear-gradient(180deg, var(--car-black) 0%, #2a2a2a 100%);
    color: var(--car-white);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    border-bottom: 3px solid var(--car-red);
    width: 100%;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 0;
    flex-wrap: wrap;
    gap: 1rem;
}

.site-title {
    font-size: 1.8rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--car-white);
    text-decoration: none;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    position: relative;
    padding-left: 15px;
    white-space: nowrap;
    flex-shrink: 0;
}

.site-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 30px;
    background: var(--car-red);
}

/* Navigation */
nav {
    position: relative;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin: 0;
    padding: 0;
}

nav a {
    color: var(--car-white);
    text-decoration: none;
    font-weight: 600;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
}

nav a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--car-red);
    transition: width 0.3s ease;
}

nav a:hover::before,
nav a.active::before {
    width: 100%;
}

nav a:hover {
    background: rgba(220, 38, 38, 0.1);
    color: var(--car-white);
}

nav a.active {
    background: var(--car-red);
    color: var(--car-white);
}

nav a.active::before {
    display: none;
}

.mobile-menu-toggle {
    display: none;
    background: var(--car-red);
    border: none;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.6rem 0.9rem;
    border-radius: 4px;
    transition: all 0.3s ease;
    line-height: 1;
    min-width: 40px;
    min-height: 40px;
    align-items: center;
    justify-content: center;
}

.mobile-menu-toggle:hover {
    background: #b91c1c;
    transform: scale(1.05);
}

.mobile-menu-toggle:active {
    transform: scale(0.95);
}

.mobile-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--car-black);
    flex-direction: column;
    padding: 0;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.5);
    border-top: 3px solid var(--car-red);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1), 
                opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1), 
                padding 0.5s cubic-bezier(0.4, 0, 0.2, 1),
                visibility 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-nav.active {
    display: flex;
    max-height: 600px;
    opacity: 1;
    visibility: visible;
    padding: 1rem 0;
}

.mobile-nav a {
    padding: 1rem 2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 1px;
    transition: all 0.3s;
}

.mobile-nav a:hover,
.mobile-nav a.active {
    background: var(--car-red);
    padding-left: 2.5rem;
}

/* Hero Section - Automotive Style */
.hero {
    background: linear-gradient(135deg, var(--car-black) 0%, #1a1a1a 50%, var(--car-gray) 100%);
    color: white;
    padding: 5rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        repeating-linear-gradient(
            90deg,
            transparent,
            transparent 2px,
            rgba(255, 255, 255, 0.03) 2px,
            rgba(255, 255, 255, 0.03) 4px
        );
    pointer-events: none;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 4px;
    text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.5);
    position: relative;
    z-index: 1;
}

.hero p {
    font-size: 1.4rem;
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    color: var(--car-silver);
}

/* Main Content */
main {
    padding: 4rem 0;
    min-height: 60vh;
    background: var(--car-light-gray);
}

.section-title {
    font-size: 2.8rem;
    color: var(--car-black);
    margin-bottom: 3rem;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 3px;
    font-weight: 900;
    position: relative;
    padding-bottom: 1rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--car-red);
}

/* Cards - Automotive Style */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-bottom: 4rem;
}

.card {
    background: var(--car-white);
    border-radius: 0;
    padding: 0;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 2px solid transparent;
    overflow: hidden;
    position: relative;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--car-red) 0%, var(--accent-orange) 100%);
    transform: scaleX(0);
    transition: transform 0.4s;
}

.card:hover::before {
    transform: scaleX(1);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.25);
    border-color: var(--car-red);
}

.card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    display: block;
    border-bottom: 3px solid var(--car-red);
}

.card-content {
    padding: 2rem;
}

.card h3 {
    color: var(--car-black);
    margin-bottom: 1rem;
    font-size: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
}

.card p {
    color: var(--car-gray);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

/* Comparison Table - Automotive Style */
.comparison-container {
    overflow-x: auto;
    margin: 3rem 0;
    background: var(--car-white);
    padding: 2rem;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border: 2px solid var(--car-chrome);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--car-white);
}

.comparison-table th {
    background: linear-gradient(180deg, var(--car-black) 0%, #2a2a2a 100%);
    color: var(--car-white);
    padding: 1.5rem 1rem;
    text-align: left;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 3px solid var(--car-red);
    font-size: 0.95rem;
}

.comparison-table td {
    padding: 1.2rem 1rem;
    border-bottom: 1px solid var(--car-chrome);
    font-weight: 500;
}

.comparison-table tr:hover {
    background: var(--car-light-gray);
}

.comparison-table tr.selected {
    background: linear-gradient(90deg, rgba(220, 38, 38, 0.1) 0%, rgba(249, 115, 22, 0.1) 100%);
}

.comparison-table tr.selected td {
    font-weight: 700;
    color: var(--car-red);
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

/* Fuel Visualizer - Fixed */
.fuel-visualizer {
    background: var(--car-white);
    padding: 3rem;
    border: 2px solid var(--car-chrome);
    margin: 3rem 0;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.fuel-visualizer h3 {
    color: var(--car-black);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 1.8rem;
}

.fuel-bars-container {
    margin-top: 2rem;
    min-width: 100%;
}

.fuel-bar-container {
    margin: 1.5rem 0;
}

.fuel-bar-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.8rem;
    font-weight: 600;
    color: var(--car-black);
    text-transform: uppercase;
    font-size: 0.95rem;
    letter-spacing: 0.5px;
}

.fuel-bar {
    height: 40px;
    background: var(--car-chrome);
    border-radius: 0;
    overflow: hidden;
    position: relative;
    border: 2px solid var(--car-gray);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.fuel-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--car-red) 0%, var(--accent-orange) 100%);
    transition: width 1s ease-out;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding-right: 1rem;
    color: var(--car-white);
    font-weight: 700;
    font-size: 1rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
    min-width: 80px;
}

/* Forms - Automotive Style */
.form-group {
    margin-bottom: 2rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.8rem;
    color: var(--car-black);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--car-chrome);
    border-radius: 0;
    font-size: 1rem;
    transition: all 0.3s;
    background: var(--car-white);
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--car-red);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin-top: 0.3rem;
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.checkbox-group label {
    margin-bottom: 0;
    text-transform: none;
    letter-spacing: normal;
    font-weight: 500;
}

.btn {
    background: linear-gradient(180deg, var(--car-red) 0%, #b91c1c 100%);
    color: white;
    padding: 1rem 3rem;
    border: none;
    border-radius: 0;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
    text-transform: uppercase;
    letter-spacing: 2px;
    box-shadow: 0 4px 15px rgba(220, 38, 38, 0.3);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    display: inline-block;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    background: linear-gradient(180deg, #b91c1c 0%, var(--car-red) 100%);
    box-shadow: 0 6px 20px rgba(220, 38, 38, 0.4);
    transform: translateY(-2px);
}

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

/* Footer - Automotive Style */
footer {
    background: linear-gradient(180deg, var(--car-black) 0%, #1a1a1a 100%);
    color: white;
    padding: 3rem 0 1.5rem;
    margin-top: 5rem;
    border-top: 5px solid var(--car-red);
}

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

.footer-section h3 {
    margin-bottom: 1.5rem;
    color: var(--car-red);
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 1.2rem;
    font-weight: 700;
    border-bottom: 2px solid var(--car-red);
    padding-bottom: 0.5rem;
    display: inline-block;
}

.footer-section a {
    color: var(--car-silver);
    text-decoration: none;
    display: block;
    margin-bottom: 0.8rem;
    transition: all 0.3s;
    padding-left: 0;
    position: relative;
}

.footer-section a::before {
    content: '▶';
    position: absolute;
    left: -15px;
    opacity: 0;
    transition: all 0.3s;
    color: var(--car-red);
}

.footer-section a:hover {
    color: var(--car-white);
    padding-left: 15px;
}

.footer-section a:hover::before {
    opacity: 1;
    left: 0;
}

.footer-section p {
    color: var(--car-silver);
    line-height: 1.8;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--car-silver);
    font-size: 0.9rem;
}

/* Tips and Guides */
.tips-list {
    list-style: none;
}

.tips-list li {
    background: var(--car-white);
    padding: 2rem;
    margin-bottom: 1.5rem;
    border-left: 6px solid var(--car-red);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s;
    border-top: 2px solid transparent;
}

.tips-list li:hover {
    border-top-color: var(--car-red);
    transform: translateX(5px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.tips-list li h3 {
    color: var(--car-black);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 1.4rem;
    font-weight: 700;
}

.tips-list li p {
    color: var(--car-gray);
    line-height: 1.9;
}

/* Contact Page Styles */
.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-card {
    background: var(--car-white);
    padding: 2.5rem;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-top: 5px solid var(--car-red);
    text-align: center;
}

.contact-card h3 {
    color: var(--car-black);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 1.3rem;
}

.contact-card p {
    color: var(--car-gray);
    font-size: 1.1rem;
    margin: 0.5rem 0;
}

.contact-card a {
    color: var(--car-red);
    text-decoration: none;
    font-weight: 700;
    transition: color 0.3s;
}

.contact-card a:hover {
    color: var(--accent-orange);
}

/* Success/Error Messages */
.message {
    padding: 1.5rem;
    border-radius: 0;
    margin-bottom: 2rem;
    text-align: center;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: 2px solid;
}

.message.success {
    background: #d1fae5;
    color: #065f46;
    border-color: #10b981;
}

.message.error {
    background: #fee2e2;
    color: #991b1b;
    border-color: #ef4444;
}

/* About Page */
.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-content p {
    color: var(--car-gray);
    line-height: 2;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.about-content h2 {
    color: var(--car-black);
    margin: 3rem 0 1.5rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 2rem;
    border-bottom: 3px solid var(--car-red);
    padding-bottom: 0.5rem;
}

/* Responsive */
@media (max-width: 1024px) {
    nav ul {
        gap: 0.3rem;
    }

    nav a {
        padding: 0.7rem 1rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }

    .header-content {
        padding: 1rem 0;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    nav ul {
        display: none;
    }

    .site-title {
        font-size: 1.3rem;
        letter-spacing: 2px;
        padding-left: 12px;
    }

    .site-title::before {
        width: 3px;
        height: 24px;
    }

    .hero h1 {
        font-size: 2.2rem;
        letter-spacing: 2px;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
        letter-spacing: 2px;
    }

    .cards-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .comparison-table {
        font-size: 0.85rem;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 0.8rem 0.5rem;
    }

    .fuel-visualizer {
        padding: 1.5rem;
        margin: 2rem 0;
    }

    .fuel-visualizer h3 {
        font-size: 1.4rem;
        letter-spacing: 1px;
        margin-bottom: 0.8rem;
    }

    .fuel-visualizer p {
        font-size: 0.95rem;
        line-height: 1.6;
    }

    .fuel-bar-container {
        margin: 1.2rem 0;
    }

    .fuel-bar-label {
        font-size: 0.85rem;
        letter-spacing: 0.3px;
        margin-bottom: 0.6rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }

    .fuel-bar {
        height: 35px;
    }

    .fuel-bar-fill {
        font-size: 0.85rem;
        padding-right: 0.8rem;
        min-width: 70px;
    }

    .contact-info {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.8rem;
        letter-spacing: 1px;
    }

    .hero p {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.6rem;
        letter-spacing: 1px;
    }

    nav a {
        padding: 0.6rem 0.8rem;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .site-title {
        font-size: 1.1rem;
        letter-spacing: 1px;
        padding-left: 10px;
    }

    .site-title::before {
        width: 3px;
        height: 20px;
    }

    .mobile-menu-toggle {
        padding: 0.5rem 0.7rem;
        font-size: 1rem;
        min-width: 36px;
        min-height: 36px;
    }

    .header-content {
        padding: 0.8rem 0;
    }

    .hero {
        padding: 3rem 0;
    }

    .hero h1 {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 1.4rem;
    }

    .fuel-visualizer {
        padding: 1rem;
        margin: 1.5rem 0;
    }

    .fuel-visualizer h3 {
        font-size: 1.2rem;
        letter-spacing: 0.5px;
        margin-bottom: 0.6rem;
    }

    .fuel-visualizer p {
        font-size: 0.9rem;
        line-height: 1.5;
    }

    .fuel-bar-container {
        margin: 1rem 0;
    }

    .fuel-bar-label {
        font-size: 0.75rem;
        letter-spacing: 0.2px;
        margin-bottom: 0.5rem;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.3rem;
    }

    .fuel-bar-label span:first-child {
        font-weight: 700;
    }

    .fuel-bar-label span:last-child {
        font-size: 0.8rem;
        color: var(--car-gray);
    }

    .fuel-bar {
        height: 30px;
        border-width: 1px;
    }

    .fuel-bar-fill {
        font-size: 0.75rem;
        padding-right: 0.5rem;
        min-width: 50px;
        justify-content: center;
    }

    /* Hide text in very narrow bars on mobile - handled by JS */
    .fuel-bar-fill.narrow {
        font-size: 0;
        padding-right: 0;
    }

    /* Smaller text for narrow bars on mobile */
    .fuel-bar-fill.narrow-text {
        font-size: 0.65rem;
        padding-right: 0.4rem;
    }
}

/* Additional mobile optimizations */
@media (max-width: 360px) {
    .fuel-visualizer {
        padding: 0.8rem;
        margin: 1rem 0;
    }

    .fuel-visualizer h3 {
        font-size: 1rem;
    }

    .fuel-visualizer p {
        font-size: 0.85rem;
    }

    .fuel-bar-label {
        font-size: 0.7rem;
    }

    .fuel-bar {
        height: 28px;
    }

    .fuel-bar-fill {
        min-width: 45px;
    }
}