/* ===========================================
   Modern 2025 CSS Design for PoxaxeKadawe
   Oil Business - Polish Industrial Fuel Solutions
   =========================================== */

/* CSS Variables */
:root {
    /* Primary Colors - Industrial/Oil Theme */
    --primary-color: #1a2332;
    --primary-light: #2d3e50;
    --primary-dark: #0f1621;
    --secondary-color: #d4a853;
    --secondary-light: #e6c477;
    --secondary-dark: #b88e3d;
    
    /* Accent Colors */
    --accent-blue: #3a7bd5;
    --accent-orange: #f27121;
    --accent-green: #4caf50;
    
    /* Neutral Colors */
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --gray: #e0e3e7;
    --medium-gray: #6c757d;
    --dark-gray: #343a40;
    --black: #000000;
    
    /* Text Colors */
    --text-primary: #1a2332;
    --text-secondary: #4a5568;
    --text-light: #718096;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Poppins', sans-serif;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.2);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;
    --radius-full: 9999px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ===========================================
   HEADER STYLES
   =========================================== */

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(10px);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    font-family: var(--font-heading);
    transition: transform var(--transition-fast);
}

.logo:hover {
    transform: scale(1.05);
    color: var(--secondary-color);
}

.main-nav {
    display: flex;
    gap: var(--spacing-lg);
}

.main-nav a {
    color: var(--white);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 80%;
    height: 2px;
    background: var(--secondary-color);
    transition: transform var(--transition-normal);
}

.main-nav a:hover {
    color: var(--secondary-color);
}

.main-nav a:hover::after {
    transform: translateX(-50%) scaleX(1);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--white);
    border-radius: var(--radius-full);
    transition: all var(--transition-normal);
}

/* ===========================================
   HERO SECTION
   =========================================== */

.hero-section {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
    margin-bottom: var(--spacing-3xl);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(26, 35, 50, 0.85) 0%, rgba(45, 62, 80, 0.75) 100%);
}

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

.hero-content {
    position: relative;
    z-index: 2;
    color: var(--white);
    max-width: 800px;
}

.hero-content h1 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-content p {
    color: rgba(255, 255, 255, 0.95);
    font-size: 1.125rem;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.hero-small {
    min-height: 350px;
}

/* ===========================================
   SECTION STYLES
   =========================================== */

section {
    padding: var(--spacing-3xl) 0;
}

section h2 {
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

section > .container > p[id$="-subtitle"] {
    text-align: center;
    font-size: 1.25rem;
    color: var(--secondary-color);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

section > .container > p[id$="-desc"] {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    color: var(--text-secondary);
}

/* ===========================================
   GRID LAYOUTS
   =========================================== */

.services-grid,
.products-grid,
.team-grid,
.solutions-grid,
.greases-grid,
.infrastructure-grid,
.benefits-list,
.certificates-grid,
.clients-stats,
.departments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

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

/* ===========================================
   CARD COMPONENTS
   =========================================== */

.service-card,
.product-card,
.team-member,
.solution-card,
.grease-card,
.infrastructure-item,
.benefit-item,
.certificate-item,
.client-stat,
.department-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--gray);
}

.service-card:hover,
.product-card:hover,
.solution-card:hover,
.grease-card:hover,
.department-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.service-card img,
.product-card img,
.solution-card img,
.grease-card img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.service-card h3,
.product-card h3,
.solution-card h3,
.grease-card h3 {
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-sm);
    font-size: 1.25rem;
}

.service-card p,
.product-card p,
.solution-card p,
.grease-card p {
    padding: 0 var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.service-card ul,
.product-card ul,
.solution-card ul {
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.service-card ul li,
.product-card ul li,
.solution-card ul li {
    padding: var(--spacing-xs) 0;
    padding-left: 1.5rem;
    position: relative;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.service-card ul li::before,
.product-card ul li::before,
.solution-card ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-green);
    font-weight: 700;
}

.service-card span,
.product-card span,
.solution-card span,
.grease-card span {
    display: block;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: var(--white);
    font-weight: 700;
    font-size: 1.125rem;
    text-align: center;
}

/* ===========================================
   STATS SECTION
   =========================================== */

.stats-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-xl);
}

.stat-item img {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    border-radius: var(--radius-full);
    border: 3px solid var(--secondary-color);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--secondary-color);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
}

/* ===========================================
   REVIEWS SECTION
   =========================================== */

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.review-card {
    background: var(--light-gray);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--secondary-color);
    box-shadow: var(--shadow-sm);
}

.review-card img {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-md);
    object-fit: cover;
}

.review-card p {
    font-style: italic;
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.review-author {
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.review-date {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* ===========================================
   CONTACT FORM
   =========================================== */

.contact-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
}

.contact-form-wrapper {
    background: var(--white);
}

#contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

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

.form-group label {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--primary-color);
}

.form-group input,
.form-group textarea {
    padding: var(--spacing-sm);
    border: 2px solid var(--gray);
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

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

.form-group.checkbox {
    flex-direction: row;
    align-items: flex-start;
}

.form-group.checkbox label {
    margin-bottom: 0;
    margin-left: var(--spacing-xs);
    font-weight: 400;
}

.form-group.checkbox input {
    margin-top: 4px;
    width: 18px;
    height: 18px;
}

.submit-btn {
    padding: var(--spacing-md) var(--spacing-xl);
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--secondary-dark) 100%);
    color: var(--white);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.125rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.form-note {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-md);
    background: var(--light-gray);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--accent-blue);
}

.form-note ul li {
    padding: var(--spacing-xs) 0;
    padding-left: 1.5rem;
    position: relative;
}

.form-note ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-blue);
}

/* Contact Sidebar */
.contact-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.contact-box {
    background: var(--light-gray);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--secondary-color);
}

.contact-box h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.contact-item {
    margin-bottom: var(--spacing-md);
}

.contact-item:last-child {
    margin-bottom: 0;
}

.contact-item strong {
    display: block;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.contact-item p {
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* ===========================================
   FAQ SECTION
   =========================================== */

.faq-list {
    max-width: 900px;
    margin: var(--spacing-xl) auto 0;
}

.faq-item {
    background: var(--white);
    border: 2px solid var(--gray);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-normal);
}

.faq-item:hover {
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-md);
}

.faq-item h3 {
    color: var(--primary-color);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: flex-start;
}

.faq-item h3::before {
    content: 'Q:';
    display: inline-block;
    color: var(--secondary-color);
    font-weight: 700;
    margin-right: var(--spacing-sm);
    flex-shrink: 0;
}

.faq-item p {
    padding-left: 2.5rem;
    line-height: 1.8;
}

/* ===========================================
   FOOTER STYLES
   =========================================== */

.site-footer {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: var(--spacing-3xl) 0 var(--spacing-md);
    margin-top: var(--spacing-3xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-col h3,
.footer-col h4 {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-md);
}

.footer-col p,
.footer-col a {
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.8;
}

.footer-col ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-col a:hover {
    color: var(--secondary-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: var(--spacing-md);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

/* ===========================================
   UTILITY CLASSES
   =========================================== */

.policies-container {
    max-width: 900px;
    margin: var(--spacing-3xl) auto;
    padding: var(--spacing-xl);
}

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

@media (max-width: 968px) {
    .main-nav {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background: var(--primary-color);
        flex-direction: column;
        padding: var(--spacing-xl);
        transition: left var(--transition-normal);
        box-shadow: var(--shadow-lg);
    }
    
    .main-nav.active {
        left: 0;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-2xl: 3rem;
        --spacing-3xl: 4rem;
    }
    
    .hero-section {
        min-height: 450px;
    }
    
    .hero-small {
        min-height: 300px;
    }
    
    .services-grid,
    .products-grid {
        grid-template-columns: 1fr;
    }
}