/* ===========================
   CSS Variables & Reset
   =========================== */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #c49b63;
    --accent-color: #e67e22;
    --text-dark: #2c3e50;
    --text-light: #7f8c8d;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e0e0e0;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Playfair Display', serif;
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

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

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

ul {
    list-style: none;
}

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

.text-center {
    text-align: center;
    margin-top: 3rem;
}

/* ===========================
   Navigation
   =========================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo h1 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin: 0;
}

.logo span {
    color: var(--secondary-color);
    font-weight: 400;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-dark);
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--secondary-color);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: width 0.3s ease;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.btn-contact {
    background: var(--secondary-color);
    color: white !important;
    padding: 0.6rem 1.5rem;
    border-radius: 25px;
}

.btn-contact::after {
    display: none;
}

.btn-contact:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    transition: var(--transition);
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    height: 100vh;
    background: linear-gradient(135deg, #2c3e50 0%, #3498db 100%);
    background-image: url('../images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    margin-top: 70px;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(44, 38, 32, 0.75) 0%, rgba(92, 64, 51, 0.65) 50%, rgba(196, 155, 99, 0.45) 100%);
    backdrop-filter: blur(1px);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    max-width: 800px;
    padding: 2rem;
    animation: fadeInUp 0.8s ease;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease;
    text-shadow: 2px 4px 12px rgba(0, 0, 0, 0.5);
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    font-family: 'Poppins', sans-serif;
    font-weight: 300;
    animation: fadeInUp 1s ease 0.2s backwards;
    text-shadow: 1px 2px 8px rgba(0, 0, 0, 0.5);
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    animation: fadeInUp 1s ease 0.4s backwards;
}

/* ===========================
   Buttons
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 30px;
    font-weight: 500;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

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

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

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

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

.btn-large {
    padding: 1.2rem 2.5rem;
    font-size: 1.1rem;
    width: 100%;
    justify-content: center;
}

/* ===========================
   Scroll Indicator
   =========================== */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.scroll-indicator span {
    display: block;
    width: 2px;
    height: 40px;
    background: white;
    animation: scroll 1.5s infinite;
}

@keyframes scroll {
    0%, 100% { opacity: 0; transform: translateY(0); }
    50% { opacity: 1; transform: translateY(10px); }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===========================
   Section Styling
   =========================== */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    color: var(--secondary-color);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 1rem;
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

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

/* ===========================
   Services Section
   =========================== */
.services {
    padding: 6rem 0;
    background: var(--bg-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
}

.service-card {
    text-align: center;
    padding: 2.5rem 2rem;
    border-radius: 15px;
    transition: var(--transition);
    background: var(--bg-white);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 50%;
    color: white;
}

.service-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.service-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* ===========================
   Featured Projects
   =========================== */
.featured-projects {
    padding: 6rem 0;
    background: var(--bg-light);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-bottom: 3rem;
}

.project-card {
    background: var(--bg-white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    position: relative;
    overflow: hidden;
    height: 280px;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.project-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(44, 62, 80, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-link {
    color: white;
    font-weight: 600;
    padding: 0.8rem 2rem;
    border: 2px solid white;
    border-radius: 30px;
    transition: var(--transition);
}

.project-link:hover {
    background: white;
    color: var(--primary-color);
}

.project-info {
    padding: 2rem;
}

.project-tag {
    display: inline-block;
    background: var(--secondary-color);
    color: white;
    padding: 0.3rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

.project-info h3 {
    font-size: 1.4rem;
    margin-bottom: 0.8rem;
    color: var(--primary-color);
}

.project-info p {
    color: var(--text-light);
    line-height: 1.8;
}

/* ===========================
   Why Us Section
   =========================== */
.why-us {
    padding: 6rem 0;
    background: var(--bg-white);
}

.why-us-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.why-us-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.why-us-text p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.feature-list {
    margin-bottom: 2rem;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 1.05rem;
}

.feature-list svg {
    color: var(--secondary-color);
    flex-shrink: 0;
}

.why-us-image {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

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

/* ===========================
   CTA Section
   =========================== */
.cta {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: white;
}

.cta-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

/* ===========================
   Footer
   =========================== */
.footer {
    background: var(--primary-color);
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: white;
}

.footer-section h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: white;
}

.footer-section p {
    opacity: 0.8;
    line-height: 1.8;
}

.footer-section ul li {
    margin-bottom: 0.8rem;
}

.footer-section a {
    opacity: 0.8;
    transition: var(--transition);
}

.footer-section a:hover {
    opacity: 1;
    color: var(--secondary-color);
}

.social-links {
    display: flex;
    gap: 1.5rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
}

/* ===========================
   Page Header
   =========================== */
.page-header {
    height: 50vh;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    margin-top: 70px;
    text-align: center;
    color: white;
}

.page-header-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
}

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

.page-header h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    color: white;
}

.page-header p {
    font-size: 1.3rem;
    opacity: 0.9;
}

/* ===========================
   About Page
   =========================== */
.about-content {
    padding: 6rem 0;
}

.about-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
    margin-bottom: 4rem;
}

.about-intro-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.about-intro-text p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-intro-image {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.values {
    padding: 6rem 0;
    background: var(--bg-light);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
}

.value-card {
    background: var(--bg-white);
    padding: 2.5rem 2rem;
    border-radius: 15px;
    text-align: center;
    transition: var(--transition);
}

.value-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.value-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 50%;
    color: white;
}

.value-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.value-card p {
    color: var(--text-light);
    line-height: 1.8;
}

.design-process {
    padding: 6rem 0;
}

.process-timeline {
    max-width: 900px;
    margin: 0 auto;
}

.process-step {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
    position: relative;
}

.process-step::before {
    content: '';
    position: absolute;
    left: 40px;
    top: 80px;
    width: 2px;
    height: calc(100% + 3rem);
    background: var(--border-color);
}

.process-step:last-child::before {
    display: none;
}

.process-number {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.process-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.8rem;
}

.process-content p {
    color: var(--text-light);
    line-height: 1.8;
}

.stats {
    padding: 5rem 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.stat-card {
    text-align: center;
    color: white;
}

.stat-number {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* ===========================
   Projects Page
   =========================== */
.project-filters {
    padding: 3rem 0;
    background: var(--bg-white);
    margin-top: 70px;
}

.filter-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.filter-btn {
    padding: 0.8rem 2rem;
    border: 2px solid var(--border-color);
    background: white;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    color: var(--text-dark);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
    color: white;
}

.projects-section {
    padding: 4rem 0;
    background: var(--bg-light);
}

.projects-grid-large {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2.5rem;
}

.project-card-large {
    background: var(--bg-white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.project-card-large:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.testimonials {
    padding: 6rem 0;
    background: var(--bg-white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.testimonial-card {
    background: var(--bg-light);
    padding: 2.5rem 2rem;
    border-radius: 15px;
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.testimonial-rating {
    color: var(--secondary-color);
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.testimonial-card p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 1.5rem;
    font-style: italic;
}

.testimonial-author strong {
    color: var(--primary-color);
    display: block;
    margin-bottom: 0.3rem;
}

.testimonial-author span {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* ===========================
   Materials Page
   =========================== */
.materials-intro {
    padding: 4rem 0;
    background: var(--bg-white);
}

.materials-section {
    padding: 4rem 0;
    background: var(--bg-light);
}

.material-category {
    margin-bottom: 5rem;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 3rem;
}

.category-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.category-info h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.category-info p {
    color: var(--text-light);
    font-size: 1.1rem;
}

.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.material-card {
    background: var(--bg-white);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.material-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.material-image {
    height: 220px;
    overflow: hidden;
}

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

.material-card h3 {
    font-size: 1.3rem;
    padding: 1.5rem 1.5rem 0.5rem;
}

.material-card > p {
    padding: 0 1.5rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

.material-features {
    padding: 1rem 1.5rem 1.5rem;
}

.material-features li {
    color: var(--text-light);
    padding: 0.5rem 0;
    border-top: 1px solid var(--border-color);
    font-size: 0.95rem;
}

.sustainability {
    padding: 6rem 0;
    background: var(--bg-white);
}

.sustainability-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 5rem;
    align-items: center;
}

.sustainability-text h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.sustainability-text p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    line-height: 1.8;
}

.sustainability-image {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

/* ===========================
   Contact Page
   =========================== */
.contact-section {
    padding: 6rem 0;
    background: var(--bg-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info .section-header {
    text-align: left;
    margin-bottom: 3rem;
}

.contact-details {
    margin-bottom: 3rem;
}

.contact-item {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--secondary-color), var(--accent-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.contact-text h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.contact-text p {
    color: var(--text-light);
    line-height: 1.6;
}

.text-small {
    font-size: 0.9rem;
    opacity: 0.8;
}

.social-media {
    margin-top: 3rem;
}

.social-media h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.social-links-large {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem 1.5rem;
    border: 2px solid var(--border-color);
    border-radius: 30px;
    transition: var(--transition);
    color: var(--text-dark);
}

.social-link:hover {
    background: var(--secondary-color);
    border-color: var(--secondary-color);
    color: white;
    transform: translateY(-3px);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.contact-form-wrapper {
    background: var(--bg-white);
    padding: 3rem;
    border-radius: 15px;
    box-shadow: var(--shadow-md);
}

.contact-form-header {
    margin-bottom: 2rem;
}

.contact-form-header h2 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.contact-form-header p {
    color: var(--text-light);
}

.contact-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

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

.form-group.full-width {
    grid-column: 1 / -1;
}

.form-group label {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    transition: var(--transition);
}

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

.form-group textarea {
    resize: vertical;
}

.form-message {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 8px;
    display: none;
}

.form-message.success {
    display: block;
    background: #d4edda;
    color: #155724;
}

.form-message.error {
    display: block;
    background: #f8d7da;
    color: #721c24;
}

.map-section {
    height: 400px;
    position: relative;
}

.map-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    position: relative;
}

.map-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
}

.map-info {
    text-align: center;
    color: white;
}

.map-info h3 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: white;
}

.map-info p {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
}

.faq-section {
    padding: 6rem 0;
    background: var(--bg-white);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
}

.faq-item {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 15px;
    transition: var(--transition);
}

.faq-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.faq-item h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.faq-item p {
    color: var(--text-light);
    line-height: 1.8;
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }

    .why-us-content,
    .about-intro,
    .sustainability-content,
    .contact-content {
        grid-template-columns: 1fr;
    }

    .projects-grid-large {
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    }
}

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

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: white;
        flex-direction: column;
        padding: 2rem;
        transition: left 0.3s ease;
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        left: 0;
    }

    .hero {
        background-attachment: scroll;
    }

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

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

    .hero-buttons {
        flex-direction: column;
    }

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

    .page-header h1 {
        font-size: 2.5rem;
    }

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

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

    .category-header {
        flex-direction: column;
        text-align: center;
    }

    .projects-grid,
    .projects-grid-large {
        grid-template-columns: 1fr;
    }

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

    .contact-form-wrapper {
        padding: 2rem 1.5rem;
    }
}

@media (max-width: 480px) {
    .hero {
        height: 80vh;
    }

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

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

    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }

    .page-header h1 {
        font-size: 2rem;
    }

    .stat-number {
        font-size: 2.5rem;
    }
}

/* ===========================
   Utility Classes
   =========================== */
.view-btn {
    color: white;
    font-weight: 600;
    padding: 0.8rem 2rem;
    border: 2px solid white;
    border-radius: 30px;
    transition: var(--transition);
    cursor: pointer;
}

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

/* Smooth scrolling for all browsers */
html {
    scroll-padding-top: 80px;
}