/* Petro Mechanical - Color Scheme from Logo */
:root {
    --primary-bg: #0a0a0a;
    --secondary-bg: #141414;
    --tertiary-bg: #1e1e1e;
    --accent: #C4A35A;
    --accent-hover: #D4B36A;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --border-color: #2a2a2a;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
header {
    background-color: var(--secondary-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo img {
    height: 90px;
    width: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 2px;
}

.logo-text span {
    display: block;
    font-size: 0.9rem;
    font-weight: 400;
    letter-spacing: 3px;
    color: var(--text-secondary);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

nav ul li a {
    color: var(--text-primary);
    font-weight: 500;
    padding: 10px 0;
    position: relative;
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: width 0.3s ease;
}

nav ul li a:hover::after,
nav ul li a.active::after {
    width: 100%;
}

nav ul li a:hover,
nav ul li a.active {
    color: var(--accent);
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--accent);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--secondary-bg) 0%, var(--primary-bg) 100%);
    padding: 100px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.hero h1 span {
    color: var(--accent);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 30px;
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 4px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 0.9rem;
}

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

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

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

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

/* Sections */
section {
    padding: 80px 20px;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.section-title p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.service-card {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 40px 30px;
    transition: all 0.3s ease;
}

.service-card:hover {
    border-color: var(--accent);
    transform: translateY(-5px);
}

.service-card h3 {
    color: var(--accent);
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.service-card p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.service-card ul {
    list-style: none;
}

.service-card ul li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    position: relative;
    padding-left: 20px;
}

.service-card ul li:last-child {
    border-bottom: none;
}

.service-card ul li::before {
    content: '>';
    color: var(--accent);
    position: absolute;
    left: 0;
}

/* Clickable Service Cards (as links) */
a.service-card {
    display: block;
    text-decoration: none;
    cursor: pointer;
}

a.service-card:hover {
    color: inherit;
}

/* Featured Service Card */
.service-card.featured {
    border-color: var(--accent);
    background: linear-gradient(135deg, var(--secondary-bg) 0%, rgba(196, 163, 90, 0.1) 100%);
    position: relative;
}

.service-card.featured::before {
    content: 'NEW';
    position: absolute;
    top: 15px;
    right: 15px;
    background-color: var(--accent);
    color: var(--primary-bg);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.service-card.featured:hover {
    border-color: var(--accent-hover);
    box-shadow: 0 0 20px rgba(196, 163, 90, 0.2);
}

/* Features Section */
.features {
    background-color: var(--secondary-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-item {
    text-align: center;
    padding: 30px;
}

.feature-icon {
    width: 80px;
    height: 80px;
    background-color: var(--tertiary-bg);
    border: 2px solid var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
    color: var(--accent);
}

.feature-item h3 {
    color: var(--text-primary);
    margin-bottom: 10px;
    font-size: 1.25rem;
}

.feature-item p {
    color: var(--text-secondary);
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.about-text h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.about-text h2 span {
    color: var(--accent);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.about-image {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 40px;
    text-align: center;
}

.about-image img {
    max-width: 100%;
    height: auto;
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    max-width: 1200px;
    margin: 0 auto;
}

.contact-info h3 {
    color: var(--accent);
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.contact-info p {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.contact-details {
    list-style: none;
}

.contact-details li {
    padding: 15px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 15px;
}

.contact-details li span {
    color: var(--accent);
    font-weight: 600;
    min-width: 80px;
}

/* Contact Form */
.contact-form {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 40px;
}

.contact-form h3 {
    color: var(--accent);
    font-size: 1.5rem;
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    background-color: var(--tertiary-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
}

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

/* Footer */
footer {
    background-color: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    padding: 60px 20px 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto 40px;
}

.footer-section h4 {
    color: var(--accent);
    font-size: 1.1rem;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer-section p {
    color: var(--text-secondary);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    padding: 8px 0;
}

.footer-section ul li a {
    color: var(--text-secondary);
}

.footer-section ul li a:hover {
    color: var(--accent);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--secondary-bg) 0%, var(--primary-bg) 100%);
    padding: 80px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.page-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

/* Service Detail Page */
.service-detail {
    max-width: 900px;
    margin: 0 auto;
}

.service-detail h2 {
    color: var(--accent);
    font-size: 1.8rem;
    margin: 40px 0 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

.service-detail p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.service-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 15px;
    margin-bottom: 30px;
}

.service-list li {
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: 4px;
    transition: border-color 0.3s ease;
}

.service-list li:hover {
    border-color: var(--accent);
}

/* Responsive Design */
@media (max-width: 992px) {
    .about-content,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: flex;
    }

    nav ul {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--secondary-bg);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        border-bottom: 1px solid var(--border-color);
    }

    nav ul.active {
        display: flex;
    }

    nav ul li {
        border-bottom: 1px solid var(--border-color);
    }

    nav ul li:last-child {
        border-bottom: none;
    }

    nav ul li a {
        display: block;
        padding: 15px 0;
    }

    .hero h1 {
        font-size: 2rem;
    }

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

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

    .section-title h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .header-container {
        padding: 10px 15px;
    }

    .logo img {
        height: 70px;
    }

    .logo-text {
        font-size: 1.2rem;
    }

    .hero {
        padding: 60px 15px;
    }

    section {
        padding: 50px 15px;
    }

    .btn {
        padding: 12px 24px;
        font-size: 0.85rem;
    }
}