:root {
    /* Color Palette */
    --primary-color: #0d2b4f; /* Dark Blue */
    --primary-light: #184275;
    --secondary-color: #1aa64b; /* Vibrant Green */
    --secondary-dark: #13853b;
    --accent-color: #f8fafc; /* Very light gray/blue */
    --text-color: #334155; /* Slate 700 */
    --text-light: #64748b; /* Slate 500 */
    --white: #ffffff;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-800: #1e293b;
    
    /* Typography */
    --font-main: 'Inter', sans-serif;
    
    /* Transition & Shadows */
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

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

body {
    font-family: var(--font-main);
    color: var(--text-color);
    background-color: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

ul {
    list-style: none;
}

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

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

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

.section {
    padding: 80px 0;
}

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

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-title {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    width: 60px;
    height: 4px;
    background-color: var(--secondary-color);
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

.section-header p {
    color: var(--text-light);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
    padding-top: 15px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--secondary-color);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(26, 166, 75, 0.4);
}

.btn-primary:hover {
    background-color: var(--secondary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(26, 166, 75, 0.5);
    color: white;
}

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

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

.btn-outline-nav {
    border: 2px solid var(--secondary-color);
    color: var(--secondary-color) !important;
    padding: 8px 20px !important;
}

.btn-outline-nav:hover {
    background-color: var(--secondary-color);
    color: var(--white) !important;
}

.btn-block {
    width: 100%;
}

/* Navbar */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    padding: 15px 0;
}

.header.scrolled {
    padding: 10px 0;
    box-shadow: var(--shadow-md);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--primary-color);
}

.logo i {
    color: var(--secondary-color);
    font-size: 1.8rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-link {
    font-weight: 500;
    color: var(--text-color);
    padding: 8px 0;
    position: relative;
}

.nav-link:not(.btn)::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    background-color: var(--secondary-color);
    bottom: 0;
    left: 0;
    transition: var(--transition);
}

.nav-link:not(.btn):hover::after,
.nav-link:not(.btn).active::after {
    width: 100%;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-color);
}

/* Hamburger */
.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    -webkit-transition: all 0.3s ease-in-out;
    transition: all 0.3s ease-in-out;
    background-color: var(--primary-color);
}

/* Hero Section */
.hero {
    position: relative;
    padding: 180px 0 120px;
    background: linear-gradient(135deg, rgba(13, 43, 79, 0.92) 0%, rgba(26, 166, 75, 0.85) 100%), url('https://images.unsplash.com/photo-1580983533869-ec5d820b336a?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat fixed;
    color: var(--white);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
    position: relative;
    z-index: 2;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-text h1 span {
    color: var(--secondary-color);
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hero-text p {
    font-size: 1.15rem;
    margin-bottom: 40px;
    opacity: 0.9;
    max-width: 550px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.hero-graphics {
    flex: 1;
    position: relative;
    display: flex;
    gap: 20px;
    justify-content: flex-end;
}

.glass-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 30px;
    border-radius: 16px;
    width: 220px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.2);
    transition: var(--transition);
}

.glass-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.15);
}

.glass-card.offset {
    margin-top: 60px;
}

.glass-card i {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.glass-card h3 {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.glass-card p {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Shape Divider CSS */
.shape-divider {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
    transform: rotate(180deg);
}

.shape-divider svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 70px;
}

.shape-divider .shape-fill {
    fill: var(--white);
}

/* About Section */
.about-container {
    display: flex;
    align-items: center;
    gap: 60px;
}

.about-image {
    flex: 1;
    position: relative;
}

.image-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, var(--gray-200), var(--accent-color));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: var(--primary-light);
    box-shadow: var(--shadow-lg);
    opacity: 0.8;
}

.experience-badge {
    position: absolute;
    bottom: -20px;
    right: -20px;
    background: var(--primary-color);
    color: var(--white);
    padding: 25px;
    border-radius: 50%;
    text-align: center;
    width: 140px;
    height: 140px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    box-shadow: 0 10px 20px rgba(13, 43, 79, 0.3);
    border: 4px solid var(--white);
}

.experience-badge span {
    font-size: 2rem;
    font-weight: 800;
    color: var(--secondary-color);
    line-height: 1;
}

.about-content {
    flex: 1;
}

.about-content p {
    margin-bottom: 20px;
    color: var(--text-light);
    font-size: 1.05rem;
}

.about-features {
    margin-top: 30px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
}

.about-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    color: var(--primary-color);
}

.about-features i {
    color: var(--secondary-color);
    font-size: 1.2rem;
}

/* Materials Section */
.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.material-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-bottom: 4px solid transparent;
    text-align: center;
}

.material-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-bottom: 4px solid var(--secondary-color);
}

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

.material-card:hover .card-icon {
    background: var(--primary-color);
    color: var(--white);
}

.material-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.material-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* Differentials Section */
.diff-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.diff-item {
    display: flex;
    align-items: center;
    gap: 20px;
    background: var(--white);
    padding: 25px;
    border-radius: 12px;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}

.diff-item:hover {
    border-color: var(--secondary-color);
    box-shadow: var(--shadow-md);
    transform: scale(1.02);
}

.diff-icon {
    width: 60px;
    height: 60px;
    background: rgba(26, 166, 75, 0.1);
    color: var(--secondary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.diff-item h4 {
    color: var(--primary-color);
    font-size: 1.1rem;
}

/* Contact Section */
.contact-container {
    display: flex;
    gap: 60px;
}

.contact-info {
    flex: 1;
}

.contact-info > p {
    color: var(--text-light);
    margin-bottom: 40px;
    font-size: 1.1rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--secondary-color);
    background: var(--white);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.contact-item h4 {
    color: var(--primary-color);
    margin-bottom: 5px;
    font-size: 1.1rem;
}

.contact-item p, .contact-item a {
    color: var(--text-light);
}

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

.social-links {
    margin-top: 40px;
    display: flex;
    gap: 15px;
}

.social-links a {
    width: 45px;
    height: 45px;
    background: var(--primary-color);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 1.2rem;
}

.social-links a:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
}

.contact-form-wrapper {
    flex: 1;
    background: var(--white);
    padding: 40px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

.form-row {
    display: flex;
    gap: 20px;
}

.form-row .form-group {
    flex: 1;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--primary-color);
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    font-family: var(--font-main);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--accent-color);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    background: var(--white);
    box-shadow: 0 0 0 4px rgba(26, 166, 75, 0.1);
}

.form-message {
    margin-top: 15px;
    padding: 15px;
    border-radius: 8px;
    display: none;
    font-weight: 500;
    text-align: center;
}

.form-message.success {
    display: block;
    background: #d1fae5;
    color: #065f46;
}

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

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 50px;
}

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

.footer-brand p {
    color: var(--gray-200);
    opacity: 0.8;
    max-width: 400px;
}

.footer-links h3,
.footer-contact h3 {
    font-size: 1.2rem;
    margin-bottom: 25px;
    position: relative;
    display: inline-block;
}

.footer-links h3::after,
.footer-contact h3::after {
    content: '';
    position: absolute;
    width: 30px;
    height: 3px;
    background: var(--secondary-color);
    bottom: -8px;
    left: 0;
    border-radius: 2px;
}

.footer-links ul li {
    margin-bottom: 12px;
}

.footer-links ul li a {
    color: var(--gray-200);
    opacity: 0.8;
}

.footer-links ul li a:hover {
    color: var(--secondary-color);
    opacity: 1;
    padding-left: 5px;
}

.footer-contact p {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--gray-200);
    opacity: 0.8;
}

.footer-contact i {
    color: var(--secondary-color);
}

.footer-bottom {
    background: var(--gray-800);
    padding: 25px 0;
    text-align: center;
    color: var(--gray-200);
    opacity: 0.8;
    font-size: 0.9rem;
}

/* WhatsApp Float Button */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background-color: #25d366;
    color: #FFF;
    border-radius: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    box-shadow: 2px 2px 10px rgba(0,0,0,0.2);
    z-index: 100;
    transition: var(--transition);
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 2px 2px 15px rgba(37, 211, 102, 0.5);
    color: #fff;
}

/* Animations */
.reveal {
    opacity: 0;
    transition: all 1s ease;
}

.reveal-left {
    transform: translateX(-50px);
}

.reveal-right {
    transform: translateX(50px);
}

.reveal-bottom {
    transform: translateY(50px);
}

.reveal.active {
    transform: translate(0, 0);
    opacity: 1;
}

/* Responsive */
@media (max-width: 992px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
        padding-top: 50px;
    }
    
    .hero-text h1 {
        font-size: 2.8rem;
    }
    
    .hero-text p {
        margin: 0 auto 30px;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-graphics {
        justify-content: center;
        margin-top: 30px;
    }
    
    .about-container,
    .contact-container {
        flex-direction: column;
    }
    
    .experience-badge {
        bottom: 20px;
        right: 20px;
    }

    .footer-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: block;
    }
    
    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }
    
    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--white);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 10px rgba(0, 0, 0, 0.1);
        padding: 20px 0;
        gap: 20px;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    .hero {
        padding: 120px 0 80px;
    }
    
    .glass-card {
        width: 160px;
        padding: 20px;
    }
    
    .glass-card h3 {
        font-size: 1rem;
    }
    
    .glass-card i {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-text h1 {
        font-size: 2.2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-graphics {
        flex-direction: column;
        align-items: center;
    }
    
    .glass-card.offset {
        margin-top: 0;
    }
}