/* --- 1. Global Reset & Variables --- */
:root {
    --color-white: #ffffff;
    --color-aqua: #00bcd4; /* Main Accent Color */
    --color-royal-blue: #0A3D62; /* Primary Dark Color */
    --color-light-gray: #f4f7f9;
    --color-text-dark: #333333;
    --color-text-light: #666666;
    --color-shadow: rgba(0, 0, 0, 0.08);

    --font-family-primary: 'Poppins', sans-serif;
    --border-radius-card: 15px;
    --transition-speed: 0.3s;
    --gradient-primary: linear-gradient(135deg, var(--color-aqua), var(--color-royal-blue));
    --gradient-light: linear-gradient(135deg, #e0f7fa, #bbdefb);
}

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

body {
    font-family: var(--font-family-primary);
    line-height: 1.6;
    color: var(--color-text-light);
    background-color: var(--color-white);
}

h1, h2, h3, h4, .logo {
    color: var(--color-royal-blue);
    font-weight: 700;
}

/* --- New Logo Image Styling --- */
.logo-img {
    height: 40px; /* Define a fixed height for the logo container */
    display: flex;
    align-items: center;
}

.logo-img img {
    height: 50%; /* Make the image fill the container height */
    width: auto; /* Maintain the image aspect ratio */
    max-width: 150px; /* Optional: Limit the width of the logo */
}

/* You can safely remove the old .logo and .logo strong styles from style.css if you are using the image everywhere. */

strong {
    font-weight: 700;
    color: var(--color-royal-blue);
}

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

a {
    text-decoration: none;
    color: var(--color-aqua);
    transition: color var(--transition-speed);
}

a:hover {
    color: var(--color-royal-blue);
}

/* --- 2. Buttons & Utility --- */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 50px;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 14px;
    cursor: pointer;
    border: none;
    transition: all var(--transition-speed) ease;
    text-align: center;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--color-white);
    box-shadow: 0 4px 15px rgba(0, 188, 212, 0.4);
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-2px);
    color: var(--color-white); /* Keep text white on hover */
}

.btn-secondary {
    background-color: var(--color-white);
    color: var(--color-royal-blue);
    border: 2px solid var(--color-royal-blue);
}

.btn-secondary:hover {
    background-color: var(--color-royal-blue);
    color: var(--color-white);
}

.btn-large {
    padding: 14px 35px;
    font-size: 16px;
}

.section-title {
    font-size: 36px;
    text-align: center;
    margin-bottom: 50px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    margin: 10px auto 0;
    border-radius: 50px;
}

/* --- 3. Header & Navigation --- */
.header {
    background-color: var(--color-white);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px var(--color-shadow);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 28px;
    font-weight: 800;
    color: var(--color-aqua);
}

.logo strong {
    color: var(--color-royal-blue);
}

.nav {
    display: flex;
    gap: 30px;
}

.nav-link {
    font-weight: 600;
    color: var(--color-text-dark);
    padding: 5px 0;
    position: relative;
}

.nav-link.active::after, .nav-link:hover::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-aqua);
    transform: scaleX(0);
    transition: transform var(--transition-speed) ease;
}

.nav-link.active::after {
    transform: scaleX(1);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--color-royal-blue);
    cursor: pointer;
}

.cta-header-btn {
    background: var(--color-aqua);
    color: var(--color-white);
    padding: 8px 20px;
    border-radius: 5px;
    font-weight: 600;
    transition: background-color var(--transition-speed);
}

.cta-header-btn:hover {
    background: var(--color-royal-blue);
    color: var(--color-white);
}

/* --- 4. Hero Section --- */
.hero-section {
    position: relative;
    background: var(--gradient-light);
    padding: 100px 0;
    text-align: center;
    overflow: hidden;
}

.hero-section .container {
    max-width: 900px;
}

.hero-headline {
    font-size: 56px;
    line-height: 1.1;
    margin-bottom: 20px;
    color: var(--color-royal-blue);
}

.hero-subtext {
    font-size: 18px;
    margin-bottom: 40px;
    color: var(--color-text-dark);
}

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

/* Image Tag Styling for Hero */
.hero-section img {
    position: absolute;
    bottom: -50px;
    right: 0;
    width: 50%; /* Adjust as needed */
    max-width: 600px;
    opacity: 0.8;
    z-index: 0;
}

/* --- 5. Services & Features (Cards) --- */
.services-preview-section, .why-choose-us-section, .packages-section, .bulk-tanker-section, .faq-section {
    padding: 80px 0;
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.service-card {
    background-color: var(--color-white);
    padding: 30px;
    border-radius: var(--border-radius-card);
    text-align: center;
    box-shadow: 0 5px 20px var(--color-shadow);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 188, 212, 0.2);
}

.service-icon {
    font-size: 40px;
    color: var(--color-aqua);
    margin-bottom: 15px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.service-card h3 {
    margin-bottom: 10px;
    font-size: 20px;
}

/* Why Choose Us Features */
.why-choose-us-section {
    background-color: var(--color-light-gray);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--color-white);
    padding: 25px;
    border-radius: var(--border-radius-card);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    border-left: 5px solid var(--color-aqua);
}

.feature-icon {
    font-size: 30px;
    color: var(--color-royal-blue);
    margin-bottom: 10px;
}

.feature-card h4 {
    margin-bottom: 5px;
    font-size: 18px;
}


/* --- 6. Packages Section (Carousel) --- */
.packages-section {
    background-color: var(--color-white);
}

.packages-carousel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    align-items: flex-start; /* Important for unequal height cards */
}

.package-card {
    background-color: var(--color-light-gray);
    padding: 40px 30px;
    border-radius: var(--border-radius-card);
    text-align: center;
    box-shadow: 0 5px 20px var(--color-shadow);
    transition: transform var(--transition-speed);
    position: relative;
    border: 2px solid transparent;
}

.package-card.featured {
    transform: scale(1.05);
    background: var(--color-white);
    border-color: var(--color-aqua);
    box-shadow: 0 15px 35px rgba(0, 188, 212, 0.3);
}

.package-card.featured:hover {
    transform: scale(1.08);
}

.badge {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-royal-blue);
    color: var(--color-white);
    padding: 5px 15px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.package-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
}

.package-price {
    font-size: 40px;
    font-weight: 700;
    color: var(--color-aqua);
    margin-bottom: 25px;
    line-height: 1;
}

.package-price span {
    font-size: 16px;
    font-weight: 400;
    color: var(--color-text-light);
    display: block;
}

.package-features {
    list-style: none;
    margin-bottom: 30px;
    text-align: left;
}

.package-features li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    color: var(--color-text-dark);
}

.package-features li i {
    color: var(--color-aqua);
    margin-right: 10px;
}

.package-features li.disabled {
    color: var(--color-text-light);
    opacity: 0.6;
}

.package-features li.disabled i {
    color: #999;
}


/* --- 7. Bulk Tanker Section --- */
.bulk-tanker-section {
    background: var(--color-royal-blue);
    color: var(--color-white);
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}

.bulk-tanker-section .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
}

.bulk-content {
    max-width: 600px;
    z-index: 10;
}

.bulk-content h2 {
    color: var(--color-white);
    font-size: 32px;
    margin-bottom: 15px;
}

.bulk-content p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.bulk-tanker-section .btn-secondary {
    background-color: var(--color-royal-blue);
    border-color: var(--color-white);
    color: var(--color-white);
}

.bulk-tanker-section .btn-secondary:hover {
    background-color: var(--color-white);
    color: var(--color-royal-blue);
}

/* Image Tag for Bulk Section */
.bulk-tanker-section img {
    width: 40%;
    max-width: 450px;
    height: auto;
    opacity: 0.8;
    z-index: 5;
}

/* --- 8. FAQ Section --- */
.faq-section {
    background-color: var(--color-white);
}

.faq-item {
    max-width: 800px;
    margin: 0 auto 20px;
    padding: 20px;
    border-radius: var(--border-radius-card);
    border: 1px solid var(--color-light-gray);
    box-shadow: 0 2px 5px var(--color-shadow);
}

.faq-question {
    font-size: 18px;
    color: var(--color-royal-blue);
    margin-bottom: 5px;
}

.faq-answer {
    font-size: 16px;
    color: var(--color-text-light);
}

/* --- 9. Footer --- */
.footer {
    background-color: var(--color-royal-blue);
    color: var(--color-white);
    padding-top: 60px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 2fr;
    gap: 30px;
    padding-bottom: 40px;
}

.footer h3 {
    color: var(--color-white);
    margin-bottom: 20px;
}

.footer h4 {
    color: var(--color-aqua);
    margin-bottom: 15px;
    text-transform: uppercase;
    font-size: 16px;
}

.footer ul {
    list-style: none;
}

.footer ul li {
    margin-bottom: 10px;
}

.footer ul li a {
    color: var(--color-light-gray);
}

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

.footer p {
    font-size: 14px;
    margin-bottom: 10px;
}

.footer .social-links a {
    color: var(--color-white);
    font-size: 20px;
    margin-right: 15px;
}

.footer .social-links a:hover {
    color: var(--color-aqua);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    padding: 20px 0;
    font-size: 12px;
}

/* --- 10. WhatsApp Quick-Chat Button --- */
.whatsapp-btn {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: #25D366; /* WhatsApp Green */
    color: var(--color-white);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 30px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    transition: transform var(--transition-speed);
}

.whatsapp-btn:hover {
    transform: scale(1.1);
}

/* --- 11. Media Queries (Responsiveness) --- */
@media (max-width: 992px) {
    .hero-headline {
        font-size: 44px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .footer-col.logo-col {
        grid-column: span 2;
    }
    .bulk-tanker-section .container {
        flex-direction: column;
        text-align: center;
    }
    .bulk-tanker-section img {
        width: 100%;
        max-width: 400px;
        margin-top: 30px;
    }
    .bulk-content {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    /* Mobile Menu Implementation */
    .nav {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 80px; /* Below header */
        left: 0;
        width: 100%;
        background-color: var(--color-white);
        box-shadow: 0 10px 10px var(--color-shadow);
        padding: 20px 0;
        text-align: center;
        z-index: 999;
    }
    .nav.nav-open {
        display: flex;
    }
    .nav-link {
        padding: 10px 0;
        border-bottom: 1px solid var(--color-light-gray);
    }
    .menu-toggle {
        display: block;
    }
    .cta-header-btn {
        display: none; /* Hide in mobile nav, show in menu */
    }
    
    /* General Adjustments */
    .hero-section {
        padding: 60px 0;
    }
    .hero-headline {
        font-size: 36px;
    }
    .section-title {
        font-size: 28px;
        margin-bottom: 40px;
    }
    .hero-cta-group {
        flex-direction: column;
        gap: 15px;
    }
    .packages-carousel {
        grid-template-columns: 1fr;
    }
    .package-card.featured {
        transform: scale(1.0); /* Remove scale on mobile */
    }
    .footer-grid {
        grid-template-columns: 1fr; /* Single column layout for mobile/tablet */
        gap: 40px; /* Increase vertical gap between sections */
        text-align: center; /* Center content in each column */
    }

    /* Adjust the logo/brand column for center alignment */
    .footer-col.logo-col {
        padding-bottom: 20px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1); /* Separator line */
    }

    /* Adjust social links alignment */
    .social-links {
        justify-content: center; /* Center the social icons */
        margin-top: 15px;
    }

    /* Adjust list items (Quick Links) */
    .footer-col ul {
        list-style: none;
        padding: 0;
        text-align: center;
    }

    /* Adjust Contact Info (Icons may need specific centering depending on base CSS) */
    .footer-col p {
        /* Remove default margins/padding if they interfere with centering */
        margin-bottom: 8px;
        display: flex; /* Allow content and icon to stay together */
        align-items: center;
        justify-content: center; /* Center the contact line */
    }
    .footer-col p i {
        margin-right: 10px;
    }
    
    .footer-bottom {
        padding: 15px 0;
    }
}