/* Custom Properties */
:root {
    --color-yellow: #FCB72B;
    --color-black: #1A1A1A;
    --color-white: #FFFFFF;
    --color-gray-light: #F8F8F8;
    --color-gray: #6B7280;
    --color-gray-dark: #374151;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --transition: all 0.3s ease;
    --border-radius: 8px;
    --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

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

html {
    scroll-behavior: smooth;
}

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

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

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

p {
    margin-bottom: 1rem;
    color: var(--color-gray-dark);
}

.highlight {
    color: var(--color-yellow);
    font-weight: 800;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--color-yellow);
    color: var(--color-black);
}

.btn-primary:hover {
    background-color: #E5A625;
    transform: translateY(-2px);
}

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

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    box-shadow: var(--box-shadow);
    z-index: 1000;
}

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

.logo h1 {
    font-size: 1.5rem;
    font-weight: 800;
    margin: 0;
    color: var(--color-black);
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--color-gray-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--color-yellow);
}

.contact-btn {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.contact-btn:hover {
    background-color: var(--color-yellow);
    color: var(--color-black);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--color-black);
    margin: 3px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    padding: 8rem 0 4rem;
    background-color: var(--color-gray-light);
    margin-top: 70px;
}

.hero-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--color-gray-dark);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.stat-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--color-yellow);
    display: block;
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-gray-dark);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Services Section */
.services {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-gray);
    max-width: 600px;
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card {
    padding: 2.5rem;
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card.primary {
    background-color: var(--color-yellow);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    display: block;
}

.service-card h3 {
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.service-card p {
    color: var(--color-gray-dark);
    margin-bottom: 1.5rem;
}

.service-features {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.service-features span {
    background-color: rgba(0, 0, 0, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
}

.service-card.primary .service-features span {
    background-color: rgba(0, 0, 0, 0.2);
}

/* About Section */
.about {
    padding: 6rem 0;
    background-color: var(--color-black);
    color: var(--color-white);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h2 {
    color: var(--color-white);
    margin-bottom: 1.5rem;
}

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

.why-us {
    margin-top: 2rem;
}

.why-us h3 {
    color: var(--color-yellow);
    margin-bottom: 1rem;
}

.benefits {
    list-style: none;
}

.benefits li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--color-gray-light);
}

.benefits li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-yellow);
    font-weight: bold;
}

.about-image {
    display: flex;
    justify-content: center;
}

.image-placeholder {
    background-color: var(--color-yellow);
    border-radius: var(--border-radius);
    padding: 3rem;
    text-align: center;
    width: 100%;
    color: var(--color-black);
}

.office-info h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* Projects Section */
.projects {
    padding: 6rem 0;
    background-color: var(--color-gray-light);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

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

.project-card:hover {
    transform: translateY(-2px);
}

.project-image {
    height: 200px;
    background-color: var(--color-gray-light);
    display: flex;
    align-items: center;
    justify-content: center;
}

.project-placeholder {
    font-size: 4rem;
}

.project-info {
    padding: 1.5rem;
}

.project-info h3 {
    margin-bottom: 0.5rem;
}

.project-info p {
    color: var(--color-gray);
}

/* Contact Section */
.contact {
    padding: 6rem 0;
    background-color: var(--color-white);
}

.contact-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
}

.contact-info h2 {
    margin-bottom: 1rem;
}

.contact-info > p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    color: var(--color-gray-dark);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.detail-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.detail-icon {
    font-size: 1.5rem;
    margin-top: 0.25rem;
}

.detail-item h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--color-black);
}

.detail-item a {
    color: var(--color-yellow);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
}

.detail-item a:hover {
    color: var(--color-black);
}

.cta-card {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: 3rem;
    border-radius: var(--border-radius);
    text-align: center;
}

.cta-card h3 {
    color: var(--color-white);
    margin-bottom: 0.5rem;
}

.cta-card p {
    color: var(--color-gray-light);
    margin-bottom: 2rem;
}

/* Footer */
.footer {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.footer-info h4 {
    color: var(--color-yellow);
    margin-bottom: 0.25rem;
}

.footer-info p,
.footer-contact p {
    color: var(--color-gray-light);
    margin-bottom: 0.25rem;
}

.footer-bottom {
    border-top: 1px solid var(--color-gray-dark);
    padding-top: 2rem;
    text-align: center;
    text-decoration: none;
}

.footer-bottom p {
    color: var(--color-gray);
}

.footer-link {
    color: var(--color-yellow);
    text-decoration: none;
    font-weight: 600;
}


/* Responsive Design */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav,
    .contact-btn {
        display: none;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero-stats {
        flex-direction: row;
        justify-content: space-around;
    }
    
    .stat-item {
        padding: 1rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 6rem 0 2rem;
    }
    
    .stat-item {
        padding: 0.75rem;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .stat-label {
        font-size: 0.8rem;
    }
    
    .service-card {
        padding: 2rem;
    }
    
    .cta-card {
        padding: 2rem;
    }
}

/* Animations */
@media (prefers-reduced-motion: no-preference) {
    .service-card,
    .project-card {
        opacity: 0;
        transform: translateY(20px);
        animation: fadeInUp 0.6s ease forwards;
    }
    
    .service-card:nth-child(2) {
        animation-delay: 0.1s;
    }
    
    .service-card:nth-child(3) {
        animation-delay: 0.2s;
    }
    
    .service-card:nth-child(4) {
        animation-delay: 0.3s;
    }
}

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

.backto { position: fixed;
    bottom: 30px;
    right: 30px;
    background-color: #0a2540;
    color: white;
    padding: 16px 36px;
    border-radius: 50px;
    text-decoration: none;
    font-family: sans-serif;
    font-weight: bold;
    font-size: 16px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.4);
    z-index: 99999;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: transform 0.3s ease, background-color 0.3s;
    border: 3px solid rgba(255,255,255,0.2);
}