/* ===========================
   OEM PARTS STORE CSS
   Professional Auto Parts E-commerce
   =========================== */

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

:root {
    /* Colors - Professional Dark Theme */
    --primary: #1a1a2e;
    --primary-light: #16213e;
    --accent: #e94560;
    --accent-hover: #ff6b6b;
    --secondary: #0f3460;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-dark: #1a1a2e;
    --bg-dark: #0f0f1a;
    --bg-card: #1a1a2e;
    --bg-light: #f5f5f5;
    --border: #2a2a4a;
    --success: #4ade80;
    --warning: #fbbf24;

    /* Spacing */
    --section-padding: 100px;
    --container-padding: 24px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;

    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-light);
}

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* ===========================
   TOP BAR
   =========================== */
.top-bar {
    background: var(--primary);
    color: var(--text-primary);
    padding: 10px 0;
    font-size: 14px;
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar-contact {
    display: flex;
    gap: 24px;
}

.top-bar-contact a {
    color: var(--text-primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.top-bar-contact a:hover {
    color: var(--accent);
}

/* ===========================
   HEADER
   =========================== */
.header {
    background: white;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-weight: 800;
    font-size: 24px;
    color: var(--primary);
}

.logo-icon {
    font-size: 32px;
}

.logo-highlight {
    color: var(--accent);
}

.nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.3s ease;
}

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

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.cart-btn {
    position: relative;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--primary);
    transition: var(--transition);
}

.cart-btn:hover {
    color: var(--accent);
}

.cart-count {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--accent);
    color: white;
    font-size: 11px;
    font-weight: 600;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

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

/* ===========================
   HERO SECTION
   =========================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center bottom;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        to bottom,
        rgba(15, 15, 26, 0.85) 0%,
        rgba(15, 15, 26, 0.7) 40%,
        rgba(15, 15, 26, 0.8) 100%
    );
    z-index: 1;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero-content {
    text-align: center;
    max-width: 950px;
    margin: 0 auto;
    padding: 60px 0;
}

.hero-badge {
    display: inline-block;
    padding: 10px 24px;
    background: rgba(233, 69, 96, 0.2);
    border: 1px solid var(--accent);
    color: var(--accent);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 24px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    color: white;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: -0.02em;
    line-height: 1.1;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.hero-subtitle {
    font-size: 1.35rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* Search Box */
.search-box {
    display: flex;
    gap: 0;
    background: white;
    border-radius: 12px;
    padding: 8px;
    box-shadow: var(--shadow-lg);
    max-width: 800px;
    margin: 0 auto 40px;
}

.brand-select {
    padding: 16px 20px;
    border: none;
    font-size: 15px;
    font-family: var(--font-primary);
    background: var(--bg-light);
    border-radius: 8px;
    min-width: 200px;
    cursor: pointer;
}

.search-input {
    flex: 1;
    padding: 16px 20px;
    border: none;
    font-size: 15px;
    font-family: var(--font-primary);
    outline: none;
}

.search-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px 32px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.search-btn:hover {
    background: var(--accent-hover);
}

/* Hero Features */
.hero-features {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.95);
    font-size: 15px;
    font-weight: 500;
    padding: 12px 20px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

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

/* Hero CTA Buttons */
.hero-cta {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-cta .btn {
    padding: 18px 40px;
    font-size: 16px;
    font-weight: 700;
}

.hero-cta .btn-secondary {
    background: transparent;
    border: 2px solid white;
    color: white;
}

.hero-cta .btn-secondary:hover {
    background: white;
    color: var(--primary);
}

/* ===========================
   SECTION STYLES
   =========================== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-label {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===========================
   BRANDS SECTION
   =========================== */
.brands {
    padding: var(--section-padding) 0;
    background: white;
}

.brands-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.brand-card {
    display: block;
    background: var(--bg-light);
    border-radius: 16px;
    overflow: hidden;
    text-decoration: none;
    transition: var(--transition);
    border: 2px solid transparent;
}

.brand-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.brand-image {
    height: 180px;
    overflow: hidden;
}

.brand-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.brand-card:hover .brand-image img {
    transform: scale(1.1);
}

.brand-info {
    padding: 20px;
    text-align: center;
}

.brand-info h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.brand-info span {
    font-size: 14px;
    color: var(--accent);
    font-weight: 600;
}

/* ===========================
   FEATURES SECTION
   =========================== */
.features {
    padding: 80px 0;
    background: var(--primary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.feature-card {
    text-align: center;
    padding: 32px 24px;
}

.feature-icon {
    margin-bottom: 20px;
    color: var(--accent);
}

.feature-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: white;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
}

/* ===========================
   POPULAR PARTS SECTION
   =========================== */
.popular-parts {
    padding: var(--section-padding) 0;
    background: var(--bg-light);
}

.parts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.part-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.part-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.part-image {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.part-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.part-card:hover .part-image img {
    transform: scale(1.05);
}

.part-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    background: var(--accent);
    color: white;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
}

.part-info {
    padding: 24px;
}

.part-category {
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.part-info h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-dark);
    margin: 8px 0 12px;
}

.part-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 16px;
}

.part-btn {
    width: 100%;
    padding: 12px 24px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.part-btn:hover {
    background: var(--accent);
}

/* ===========================
   ABOUT SECTION
   =========================== */
.about {
    padding: var(--section-padding) 0;
    background: white;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-content p {
    font-size: 1.0625rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-stats {
    display: flex;
    gap: 48px;
    margin-top: 40px;
}

.about-stat {
    text-align: center;
}

.about-stat .stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
}

.about-stat .stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 8px;
}

.about-image {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ===========================
   NEWSLETTER SECTION
   =========================== */
.newsletter {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
}

.newsletter-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.newsletter h2 {
    font-size: 2rem;
    font-weight: 800;
    color: white;
    margin-bottom: 12px;
}

.newsletter p {
    font-size: 1.0625rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
}

.newsletter-form {
    display: flex;
    gap: 12px;
}

.newsletter-form input {
    flex: 1;
    padding: 16px 24px;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-family: var(--font-primary);
}

.newsletter-form button {
    padding: 16px 32px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.newsletter-form button:hover {
    background: var(--secondary);
}

/* ===========================
   CONTACT SECTION
   =========================== */
.contact {
    padding: var(--section-padding) 0;
    background: var(--bg-light);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-lead {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 16px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.contact-item strong {
    display: block;
    color: var(--text-dark);
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-item a {
    color: var(--accent);
    text-decoration: none;
    transition: var(--transition);
}

.contact-item a:hover {
    text-decoration: underline;
}

.contact-item span {
    color: var(--text-secondary);
    font-size: 15px;
}

.contact-form-wrapper {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

.contact-form h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 24px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 14px 16px;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    font-family: var(--font-primary);
    font-size: 15px;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(233, 69, 96, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 32px;
    font-weight: 600;
    font-size: 16px;
    border-radius: 8px;
    text-decoration: none;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

/* ===========================
   FOOTER
   =========================== */
.footer {
    background: var(--primary);
    color: white;
    padding: 80px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr repeat(4, 1fr);
    gap: 48px;
    margin-bottom: 48px;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    margin-top: 16px;
    font-size: 14px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 20px;
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-column ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--accent);
}

.footer-column li {
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

.footer-bottom-links {
    display: flex;
    gap: 24px;
}

.footer-bottom-links a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

.footer-bottom-links a:hover {
    color: white;
}

/* ===========================
   RESPONSIVE DESIGN
   =========================== */

/* Tablet Landscape */
@media (max-width: 1024px) {
    :root {
        --section-padding: 80px;
    }

    .brands-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .parts-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
}

/* Tablet Portrait */
@media (max-width: 768px) {
    :root {
        --section-padding: 60px;
    }

    .top-bar-content {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }

    .top-bar-contact {
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        background: white;
        padding: 100px 24px 32px;
        transform: translateX(-100%);
        transition: var(--transition);
        gap: 24px;
        z-index: 999;
    }

    .nav.active {
        transform: translateX(0);
    }

    .nav-link {
        font-size: 18px;
    }

    .mobile-toggle {
        display: flex;
        z-index: 1001;
    }

    .hero {
        min-height: auto;
        padding: 120px 0 60px;
    }

    .hero-content {
        padding: 40px 0;
    }

    .hero-title {
        font-size: 2rem;
    }

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

    .search-box {
        flex-direction: column;
        gap: 12px;
    }

    .brand-select {
        width: 100%;
    }

    .hero-features {
        gap: 12px;
    }

    .hero-feature {
        padding: 10px 16px;
        font-size: 13px;
    }

    .hero-cta .btn {
        width: 100%;
        padding: 16px 32px;
    }

    .brands-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .parts-grid {
        grid-template-columns: 1fr;
    }

    .about-stats {
        flex-wrap: wrap;
        gap: 32px;
    }

    .newsletter-form {
        flex-direction: column;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .contact-form-wrapper {
        padding: 24px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
        text-align: center;
    }

    .footer-logo {
        justify-content: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

/* Mobile */
@media (max-width: 480px) {
    .logo-text {
        font-size: 18px;
    }

    .hero-title {
        font-size: 1.75rem;
    }

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

    .hero-features {
        flex-direction: column;
        gap: 16px;
    }

    .brands-grid {
        grid-template-columns: 1fr;
    }

    .brand-image {
        height: 150px;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .about-stats {
        justify-content: center;
    }

    .about-stat .stat-number {
        font-size: 2rem;
    }
}