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

:root {
    --color-white: #ffffff;
    --color-off-white: #fafafa;
    --color-light-gray: #f5f5f5;
    --color-gray: #e5e5e5;
    --color-medium-gray: #737373;
    --color-dark-gray: #404040;
    --color-black: #171717;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background-color: var(--color-white);
    color: var(--color-black);
    line-height: 1.6;
}

/* ==================== HEADER ==================== */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

header.scrolled {
    box-shadow: 0 1px 0 var(--color-gray);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.25rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--color-black);
}

.logo img {
    max-height: 30px; /* adjust depending on your header size */
    width: auto;
    display: block;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2.5rem;
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--color-dark-gray);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.btn-contact {
    padding: 0.625rem 1.25rem;
    background-color: var(--color-black);
    color: var(--color-white);
    border-radius: 4px;
    transition: background-color 0.3s ease;
}

.btn-contact:hover {
    background-color: var(--color-dark-gray);
    color: var(--color-white);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-black);
    transition: all 0.3s ease;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    flex-direction: column;
    padding: 1rem 2rem 2rem;
    background-color: var(--color-white);
    border-top: 1px solid var(--color-gray);
}

.mobile-menu.active {
    display: flex;
}

.mobile-link {
    padding: 1rem 0;
    font-size: 1rem;
    color: var(--color-dark-gray);
    text-decoration: none;
    border-bottom: 1px solid var(--color-light-gray);
}

.mobile-link:last-child {
    border-bottom: none;
}

/* ==================== SECTIONS ==================== */
.section {
    min-height: 100vh;
    width: 100vw;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 2rem;
}

.section-container {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

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

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-medium-gray);
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 500;
    letter-spacing: -0.03em;
    color: var(--color-black);
    line-height: 1.1;
}

/* ==================== HERO ==================== */
.hero {
    background-color: var(--color-black);
    flex-direction: column;
    text-align: center;
    padding-top: 8rem;
    position: relative;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-background img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    animation: subtleZoom 20s ease-in-out infinite alternate;
}

@keyframes subtleZoom {
    0% {
        transform: scale(1);
    }
    100% {
        transform: scale(1.05);
    }
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to bottom,
        rgba(255, 255, 255, 0.85) 0%,
        rgba(255, 255, 255, 0.9) 50%,
        rgba(255, 255, 255, 0.95) 100%
    );
    z-index: 1;
}

.hero-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.hero-logo img {
    max-width: 300px; /* logo size */
    margin-bottom: 20px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem); /* responsive scaling */
    font-weight: 500;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--color-black);
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem); /* responsive scaling */
    font-weight: 300;
    color: var(--color-medium-gray);
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    font-size: 0.9375rem;
    font-weight: 500;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background-color: var(--color-dark-gray);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-black);
    border: 1px solid var(--color-gray);
}

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

.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    z-index: 2;
}

.scroll-indicator span {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-medium-gray);
}

.scroll-line {
    width: 1px;
    height: 40px;
    background-color: var(--color-gray);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background-color: var(--color-black);
    animation: scrollDown 1.5s ease-in-out infinite;
}

@keyframes scrollDown {
    0% { transform: translateY(-100%); }
    100% { transform: translateY(200%); }
}


/* ==================== WHY BIM ==================== */
.why-bim {
    background-color: var(--color-off-white);
}

.why-bim-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.why-bim-card {
    background-color: var(--color-white);
    padding: 2.5rem;
    border-radius: 8px;
    transition: all 0.4s ease;
    opacity: 0;
    transform: translateY(30px);
}

.why-bim-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.why-bim-card:hover {
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
}

.card-number {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-medium-gray);
    margin-bottom: 1.5rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 1rem;
    color: var(--color-black);
}

.card-text {
    font-size: 0.9375rem;
    color: var(--color-dark-gray);
    font-weight: 300;
    line-height: 1.7;
}

/* ==================== SERVICES ==================== */
.services {
    background-color: var(--color-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.service-card {
    border: 1px solid var(--color-gray);
    border-radius: 8px;
    transition: all 0.4s ease;
    opacity: 0;
    transform: translateY(30px);
    overflow: hidden;
    background-color: var(--color-white);
}

.service-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.service-card:hover {
    border-color: var(--color-black);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.service-card:hover .service-image img {
    transform: scale(1.05);
}

.service-image {
    width: 100%;
    aspect-ratio: 16/10;
    overflow: hidden;
    background-color: var(--color-light-gray);
}

.service-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.service-content {
    padding: 1.5rem;
}

.service-title {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
    color: var(--color-black);
}

.service-text {
    font-size: 0.875rem;
    color: var(--color-medium-gray);
    font-weight: 300;
    line-height: 1.7;
}

/* ==================== PROJECTS ==================== */
.projects {
    background-color: var(--color-off-white);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 280px);
    gap: 1.5rem;
}

.project-card {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.4s ease;
}

.project-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.project-card-large {
    grid-row: span 2;
}

.project-image {
    width: 100%;
    height: 100%;
    background-color: var(--color-light-gray);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

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

.project-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(0, 0, 0, 0.8) 0%,
        rgba(0, 0, 0, 0.3) 50%,
        transparent 100%
    );
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1.5rem;
    opacity: 0;
    transition: opacity 0.4s ease;
}

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

.project-category {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.5rem;
}

.project-title {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-white);
    margin-bottom: 0.5rem;
}

.project-description {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 300;
}

/* ==================== ABOUT ==================== */
.about {
    background-color: var(--color-white);
}

.about-intro {
    max-width: 800px;
    margin: 0 auto 4rem;
    text-align: center;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.about-intro.visible {
    opacity: 1;
    transform: translateY(0);
}

.about-text {
    font-size: 1.125rem;
    color: var(--color-dark-gray);
    font-weight: 300;
    line-height: 1.8;
    margin-bottom: 1rem;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
    max-width: 900px;
    margin: 0 auto;
}

.team-member {
    text-align: center;
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.team-member.visible {
    opacity: 1;
    transform: translateY(0);
}

.team-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 1.5rem;
    background-color: var(--color-light-gray);
}

.team-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(20%);
    transition: filter 0.4s ease;
}

.team-member:hover .team-image img {
    filter: grayscale(0%);
}

.team-info {
    padding: 0 1rem;
}

.team-name {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-black);
    margin-bottom: 0.25rem;
}

.team-role {
    font-size: 0.875rem;
    color: var(--color-medium-gray);
    display: block;
    margin-bottom: 1rem;
}

.team-bio {
    font-size: 0.9375rem;
    color: var(--color-dark-gray);
    font-weight: 300;
    line-height: 1.6;
}

.about-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid var(--color-gray);
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 500;
    color: var(--color-black);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-medium-gray);
    margin-top: 0.5rem;
}

/* ==================== CONTACT ==================== */
.contact {
    background-color: var(--color-white);
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info {
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.6s ease;
}

.contact-info.visible {
    opacity: 1;
    transform: translateX(0);
}

.contact-info .section-title {
    text-align: left;
    margin-bottom: 1.5rem;
}

.contact-text {
    font-size: 1rem;
    color: var(--color-dark-gray);
    font-weight: 300;
    line-height: 1.8;
    margin-bottom: 2.5rem;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.contact-label {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-medium-gray);
}

.contact-item a,
.contact-item span {
    font-size: 1rem;
    color: var(--color-black);
    text-decoration: none;
}

.contact-item a:hover {
    text-decoration: underline;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.6s ease;
}

.contact-form.visible {
    opacity: 1;
    transform: translateX(0);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-dark-gray);
}

.form-group input,
.form-group textarea {
    padding: 1rem;
    font-size: 1rem;
    font-family: inherit;
    border: 1px solid var(--color-gray);
    border-radius: 4px;
    background-color: var(--color-white);
    transition: border-color 0.3s ease;
}

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

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ==================== FOOTER ==================== */
footer {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: 3rem 2rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-logo {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--color-medium-gray);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-copy {
    font-size: 0.875rem;
    color: var(--color-medium-gray);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1024px) {
    .why-bim-grid {
        grid-template-columns: 1fr 1fr;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: auto;
    }

    .project-card-large {
        grid-row: span 1;
    }

    .contact-container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .team-grid {
        gap: 2rem;
    }

    .team-image {
        width: 160px;
        height: 160px;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 5rem 1.5rem;
    }

    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .header-content {
        padding: 1rem 1.5rem;
    }

    .why-bim-grid {
        grid-template-columns: 1fr;
    }

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

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

    .project-overlay {
        opacity: 1;
    }

    .team-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .about-stats {
        gap: 2rem;
        flex-wrap: wrap;
        justify-content: center;
    }

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

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .scroll-indicator {
        display: none;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 4rem 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }

    .about-stats {
        gap: 1.5rem;
    }

    .stat {
        flex: 0 0 45%;
    }

    .stat-number {
        font-size: 2rem;
    }
}