/* ===== CSS VARIABLES ===== */
    :root {
        --blue: #e55b0d;
        --blue-light: #f78a48;
        --blue-pale: #fff1e6;
        --blue-dark: #a84004;
        --white: #FFFFFF;
        --gray-50: #f3f4f4;
        --gray-100: #e3e5e5;
        --gray-300: #c2c8cb;
        --gray-500: #60676b;
        --gray-700: #343b40;
        --gray-900: #0f1113;
        --accent: #ffb526;
        --font-display: 'Barlow Condensed', sans-serif;
        --font-body: 'Barlow', sans-serif;
        --shadow-sm: 0 2px 8px rgba(168, 64, 4, .08);
        --shadow-md: 0 4px 24px rgba(168, 64, 4, .14);
        --shadow-lg: 0 8px 40px rgba(168, 64, 4, .2);
        --radius: 12px;
        --radius-sm: 8px;
        --transition: .3s cubic-bezier(.4, 0, .2, 1);
    }

    /* ===== RESET ===== */
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: var(--font-body);
        color: var(--gray-900);
        background: #f2f3f3;
        overflow-x: clip;
    }

    a {
        text-decoration: none;
        color: inherit;
    }

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

    ul {
        list-style: none;
    }

    /* ===== UTILITIES ===== */
    .container {
        max-width: 1160px;
        margin: 0 auto;
        padding: 0 24px;
    }

    .btn {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 14px 32px;
        border-radius: var(--radius-sm);
        font-family: var(--font-display);
        font-weight: 700;
        font-size: 15px;
        letter-spacing: .08em;
        text-transform: uppercase;
        cursor: pointer;
        border: none;
        transition: var(--transition);
    }

    .btn-primary {
        background: var(--blue);
        color: var(--white);
        box-shadow: 0 4px 16px rgba(168, 64, 4, .3);
    }

    .btn-primary:hover {
        background: var(--blue-dark);
        transform: translateY(-2px);
        box-shadow: 0 8px 24px rgba(168, 64, 4, .4);
    }

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

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

    .section-label {
        display: inline-block;
        font-family: var(--font-display);
        font-weight: 700;
        font-size: 12px;
        letter-spacing: .16em;
        text-transform: uppercase;
        color: var(--blue);
        background: var(--blue-pale);
        padding: 6px 14px;
        border-radius: 20px;
        margin-bottom: 16px;
    }

    .section-title {
        font-family: var(--font-display);
        font-weight: 800;
        font-size: clamp(28px, 5vw, 42px);
        line-height: 1.1;
        color: var(--gray-900);
        margin-bottom: 16px;
    }

    .section-subtitle {
        font-size: 16px;
        color: var(--gray-500);
        line-height: 1.7;
        max-width: 540px;
    }

    /* ===== NAV ===== */
    .nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 100;
        background: #FFF;
        backdrop-filter: blur(12px);
        border-bottom: 1px solid var(--gray-100);
        transition: box-shadow var(--transition);
    }

    .nav.scrolled {
        box-shadow: var(--shadow-md);
    }

    .nav-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 72px;
        gap: 32px;
    }

    .logo {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-shrink: 0;
    }

    .logo-icon {
        width: 42px;
        height: 42px;
        background: linear-gradient(145deg, var(--blue) 0%, var(--blue-dark) 100%);
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .logo-icon svg {
        width: 26px;
        height: 26px;
        fill: white;
    }

    .logo-text {
        line-height: 1.1;
    }

    .logo-text strong {
        display: block;
        font-family: var(--font-display);
        font-weight: 800;
        font-size: 17px;
        color: var(--blue);
        letter-spacing: .02em;
    }

    .logo-text span {
        font-size: 11px;
        color: var(--gray-500);
        letter-spacing: .06em;
        text-transform: uppercase;
    }

    .nav-links {
        display: flex;
        align-items: center;
        gap: 4px;
    }

    .nav-links a {
        font-family: var(--font-display);
        font-weight: 600;
        font-size: 14px;
        letter-spacing: .06em;
        text-transform: uppercase;
        color: var(--gray-700);
        padding: 8px 14px;
        border-radius: var(--radius-sm);
        transition: var(--transition);
        position: relative;
    }

    .nav-links a:hover,
    .nav-links a.active {
        color: var(--blue);
        background: var(--blue-pale);
    }

    .nav-actions {
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .nav-contact {
        display: flex;
        align-items: center;
        gap: 6px;
        font-size: 13px;
        color: var(--gray-700);
    }

    .nav-contact svg {
        width: 18px;
        height: 18px;
        fill: var(--blue);
    }

    .hamburger {
        display: none;
        flex-direction: column;
        gap: 5px;
        cursor: pointer;
        padding: 8px;
    }

    .hamburger span {
        display: block;
        width: 24px;
        height: 2px;
        background: var(--gray-900);
        border-radius: 2px;
        transition: var(--transition);
    }

    .hamburger.open span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    .hamburger.open span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.open span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    /* ===== HERO ===== */
    .hero {
        margin-top: 72px;
        position: relative;
        min-height: 90vh;
        display: flex;
        align-items: center;
        overflow: hidden;
        background: linear-gradient(135deg, #fef4f0 0%, #ffffff 48%, #ffe8db 100%);
    }

    .hero-bg {
        position: absolute;
        inset: 0;
        background: url('https://images.unsplash.com/photo-1504307651254-35680f356dfd?w=1400&q=80') center/cover no-repeat;
        filter: saturate(.75);
    }

    .hero-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(140deg, rgba(255, 255, 255, .9) 0%, rgba(255, 255, 255, .7) 55%, rgba(255, 241, 230, .85) 100%);
    }

    .hero-content {
        position: relative;
        z-index: 2;
        padding: 100px 0;
        max-width: 680px;
    }

    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: rgba(229, 91, 13, .1);
        border: 1px solid rgba(168, 64, 4, .28);
        color: var(--gray-900);
        font-family: var(--font-display);
        font-size: 12px;
        font-weight: 700;
        letter-spacing: .12em;
        text-transform: uppercase;
        padding: 8px 16px;
        border-radius: 20px;
        margin-bottom: 28px;
        backdrop-filter: blur(8px);
    }

    .hero-badge::before {
        content: '';
        width: 8px;
        height: 8px;
        background: var(--accent);
        border-radius: 50%;
    }

    .hero h1 {
        font-family: var(--font-display);
        font-weight: 800;
        font-size: clamp(40px, 8vw, 76px);
        line-height: 1.0;
        color: var(--gray-900);
        letter-spacing: -.01em;
        margin-bottom: 20px;
        text-shadow: 0 2px 18px rgba(255, 255, 255, .45);
    }

    .hero h1 span {
        color: var(--blue-dark);
    }

    .hero p {
        font-size: 18px;
        color: var(--gray-700);
        line-height: 1.7;
        margin-bottom: 40px;
        max-width: 500px;
    }

    .hero-ctas {
        display: flex;
        gap: 16px;
        flex-wrap: wrap;
    }

    .btn-hero-primary {
        background: var(--accent);
        color: #241005;
        font-family: var(--font-display);
        font-weight: 700;
        font-size: 15px;
        letter-spacing: .08em;
        text-transform: uppercase;
        padding: 16px 36px;
        border-radius: var(--radius-sm);
        border: none;
        cursor: pointer;
        transition: var(--transition);
        box-shadow: 0 4px 20px rgba(255, 181, 38, .35);
        display: inline-flex;
        align-items: center;
        gap: 8px;
    }

    .btn-hero-primary:hover {
        background: var(--blue-light);
        transform: translateY(-2px);
        box-shadow: 0 8px 28px rgba(247, 138, 72, .35);
    }

    .btn-hero-outline {
        background: transparent;
        color: var(--gray-900);
        border: 2px solid rgba(15, 17, 19, .35);
        font-family: var(--font-display);
        font-weight: 700;
        font-size: 15px;
        letter-spacing: .08em;
        text-transform: uppercase;
        padding: 14px 36px;
        border-radius: var(--radius-sm);
        cursor: pointer;
        transition: var(--transition);
        display: inline-flex;
        align-items: center;
        gap: 8px;
    }

    .btn-hero-outline:hover {
        background: rgba(15, 17, 19, .06);
        border-color: var(--gray-900);
    }

    .hero-stats {
        position: absolute;
        bottom: 40px;
        right: 0;
        z-index: 2;
        display: flex;
        gap: 2px;
    }

    .hero-stat {
        background: rgba(255, 255, 255, .75);
        backdrop-filter: blur(12px);
        border: 1px solid rgba(15, 17, 19, .08);
        padding: 20px 28px;
        text-align: center;
        min-width: 120px;
    }

    .hero-stat:first-child {
        border-radius: var(--radius) 0 0 var(--radius);
    }

    .hero-stat:last-child {
        border-radius: 0 var(--radius) var(--radius) 0;
    }

    .hero-stat strong {
        display: block;
        font-family: var(--font-display);
        font-weight: 800;
        font-size: 32px;
        color: var(--gray-900);
        line-height: 1;
    }

    .hero-stat span {
        font-size: 12px;
        color: var(--gray-700);
        text-transform: uppercase;
        letter-spacing: .08em;
        margin-top: 4px;
        display: block;
    }

    /* ===== ABOUT ===== */
    .about {
        padding: 96px 0;
        background: var(--white);
    }

    .about-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 80px;
        align-items: center;
    }

    .about-visual {
        position: relative;
    }

    .about-img-wrap {
        border-radius: var(--radius);
        overflow: hidden;
        box-shadow: var(--shadow-lg);
        aspect-ratio: 4/3;
        background: linear-gradient(135deg, var(--blue-dark), var(--blue-light));
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .about-img-wrap img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    .about-badge {
        position: absolute;
        bottom: -20px;
        right: -20px;
        background: var(--blue);
        color: white;
        padding: 20px 24px;
        border-radius: var(--radius);
        box-shadow: var(--shadow-md);
        text-align: center;
    }

    .about-badge strong {
        display: block;
        font-family: var(--font-display);
        font-weight: 800;
        font-size: 36px;
        line-height: 1;
    }

    .about-badge span {
        font-size: 12px;
        text-transform: uppercase;
        letter-spacing: .08em;
        opacity: .85;
    }

    .about-content .section-subtitle {
        margin-bottom: 32px;
    }

    .about-features {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
        margin-top: 32px;
    }

    .about-feature {
        display: flex;
        align-items: center;
        gap: 12px;
        background: var(--gray-50);
        padding: 16px;
        border-radius: var(--radius-sm);
        border: 1px solid var(--gray-100);
        transition: var(--transition);
    }

    .about-feature:hover {
        border-color: var(--blue-pale);
        box-shadow: var(--shadow-sm);
    }

    .about-feature-icon {
        width: 36px;
        height: 36px;
        background: var(--blue-pale);
        border-radius: 8px;
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
    }

    .about-feature-icon svg {
        width: 18px;
        height: 18px;
        fill: var(--blue);
    }

    .about-feature p {
        font-weight: 600;
        font-size: 13px;
        color: var(--gray-700);
        line-height: 1.4;
    }

    /* ===== MATERIALS ===== */
    .materials {
        padding: 96px 0;
        background: var(--gray-50);
    }

    .materials-header {
        text-align: center;
        margin-bottom: 64px;
    }

    .materials-header .section-subtitle {
        margin: 0 auto;
    }

    .materials-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }

    .material-card {
        background: var(--white);
        border-radius: var(--radius);
        border: 1px solid var(--gray-100);
        padding: 32px 28px;
        transition: var(--transition);
        cursor: pointer;
        position: relative;
        overflow: hidden;
        box-shadow: var(--shadow-sm);
    }

    .material-card::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, var(--blue) 0%, var(--blue-light) 100%);
        opacity: 0;
        transition: var(--transition);
    }

    .material-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
        border-color: var(--blue-pale);
    }

    .material-card:hover::before {
        opacity: 1;
    }

    .material-card:hover .material-icon {
        background: rgba(255, 255, 255, .2);
    }

    .material-card:hover .material-icon svg {
        fill: white;
    }

    .material-card:hover .material-name {
        color: white;
    }

    .material-card:hover .material-desc {
        color: rgba(255, 255, 255, .8);
    }

    .material-card:hover .material-tag {
        background: rgba(255, 255, 255, .15);
        color: white;
    }

    .material-icon {
        width: 60px;
        height: 60px;
        background: var(--blue-pale);
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 20px;
        transition: var(--transition);
        position: relative;
        z-index: 1;
    }

    .material-icon svg {
        width: 28px;
        height: 28px;
        fill: var(--blue);
        transition: var(--transition);
    }

    .material-name {
        font-family: var(--font-display);
        font-weight: 700;
        font-size: 20px;
        color: var(--gray-900);
        margin-bottom: 8px;
        transition: var(--transition);
        position: relative;
        z-index: 1;
    }

    .material-desc {
        font-size: 14px;
        color: var(--gray-500);
        line-height: 1.6;
        transition: var(--transition);
        position: relative;
        z-index: 1;
        margin-bottom: 16px;
    }

    .material-tag {
        display: inline-block;
        font-size: 11px;
        font-weight: 600;
        letter-spacing: .08em;
        text-transform: uppercase;
        background: var(--blue-pale);
        color: var(--blue);
        padding: 4px 10px;
        border-radius: 20px;
        transition: var(--transition);
        position: relative;
        z-index: 1;
    }

    /* ===== PROJECTS ===== */
    .projects {
        padding: 96px 0;
        background: var(--white);
    }

    .projects-header {
        display: flex;
        align-items: flex-end;
        justify-content: space-between;
        margin-bottom: 48px;
        gap: 24px;
    }

    .projects-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }

    .project-card {
        border-radius: var(--radius);
        overflow: hidden;
        position: relative;
        aspect-ratio: 4/3;
        background: linear-gradient(135deg, var(--blue-dark), var(--blue));
        box-shadow: var(--shadow-md);
        cursor: pointer;
    }

    .project-card img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform .5s ease;
    }

    .project-card:hover img {
        transform: scale(1.08);
    }

    .project-overlay {
        position: absolute;
        inset: 0;
        background: linear-gradient(to top, rgba(94, 38, 12, .9) 0%, transparent 50%);
        display: flex;
        flex-direction: column;
        justify-content: flex-end;
        padding: 24px;
        transition: var(--transition);
    }

    .project-card:hover .project-overlay {
        background: linear-gradient(to top, rgba(94, 38, 12, .95) 0%, rgba(168, 64, 4, .3) 100%);
    }

    .project-cat {
        font-size: 11px;
        font-weight: 700;
        letter-spacing: .1em;
        text-transform: uppercase;
        color: var(--accent);
        margin-bottom: 6px;
    }

    .project-name {
        font-family: var(--font-display);
        font-weight: 700;
        font-size: 18px;
        color: white;
    }

    /* ===== CONTACT ===== */
    .contact {
        padding: 96px 0;
        background: var(--gray-50);
    }


    .contact-info {
        padding-top: 8px;
    }

    .contact-info .section-subtitle {
        margin-bottom: 40px;
    }

    .contact-items {
        display: flex;
        flex-wrap: wrap;
        row-gap: 24px;
    }

    .contact-item {
        flex: 0 0 50%;
        max-width: 50%;
        display: flex;
        align-items: flex-start;
        gap: 16px;
    }

    .contact-item-icon {
        width: 48px;
        height: 48px;
        background: var(--blue);
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        flex-shrink: 0;
    }

    .contact-item-icon svg {
        width: 22px;
        height: 22px;
        fill: white;
    }

    .contact-item-label {
        font-size: 11px;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: .1em;
        color: var(--blue);
        margin-bottom: 4px;
    }

    .contact-item-value {
        font-size: 16px;
        font-weight: 500;
        color: var(--gray-900);
        text-decoration: none;
        transition: var(--transition);

        &:hover {
            color: var(--blue);
        }
    }

    .social-links {
        display: flex;
        gap: 12px;
        margin-top: 40px;
    }

    .social-link {
        width: 44px;
        height: 44px;
        background: var(--blue-pale);
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        transition: var(--transition);
    }

    .social-link:hover {
        background: var(--blue);
    }

    .social-link:hover svg {
        fill: white;
    }

    .social-link svg {
        width: 20px;
        height: 20px;
        fill: var(--blue);
        transition: var(--transition);
    }

    /* ===== FOOTER ===== */
    .footer {
        background: #0f1113;
        color: white;
        padding: 24px 0;
    }

    .footer-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        flex-wrap: wrap;
    }

    .footer-copy {
        font-size: 13px;
        color: rgba(255, 255, 255, .6);
    }

    .footer-links {
        display: flex;
        gap: 24px;
    }

    .footer-links a {
        font-size: 13px;
        color: rgba(255, 255, 255, .6);
        transition: var(--transition);
    }

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

    /* ===== MOBILE MENU ===== */
    .mobile-menu {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        border-top: 1px solid var(--gray-100);
        box-shadow: var(--shadow-lg);
        z-index: 99;
        padding: 16px 24px 24px;
    }

    .mobile-menu.open {
        display: block;
    }

    .mobile-menu a {
        display: block;
        padding: 12px 16px;
        font-family: var(--font-display);
        font-weight: 600;
        font-size: 16px;
        letter-spacing: .06em;
        text-transform: uppercase;
        color: var(--gray-700);
        border-radius: var(--radius-sm);
        transition: var(--transition);
    }

    .mobile-menu a:hover {
        background: var(--blue-pale);
        color: var(--blue);
    }

    /* ===== ANIMATIONS ===== */
    .fade-up {
        opacity: 0;
        transform: translateY(30px);
        transition: opacity .6s ease, transform .6s ease;
    }

    .fade-up.visible {
        opacity: 1;
        transform: translateY(0);
    }

    .fade-up:nth-child(2) {
        transition-delay: .1s;
    }

    .fade-up:nth-child(3) {
        transition-delay: .2s;
    }

    .fade-up:nth-child(4) {
        transition-delay: .3s;
    }

    .fade-up:nth-child(5) {
        transition-delay: .4s;
    }

    .fade-up:nth-child(6) {
        transition-delay: .5s;
    }

    /* ===== RESPONSIVE ===== */
    @media (max-width: 1024px) {
        .about-grid {
            gap: 48px;
        }

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

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

    @media (max-width: 768px) {

        .nav-links,
        .nav-actions {
            display: none;
        }

        .hamburger {
            display: flex;
        }

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

        .about-visual {
            order: -1;
        }

        .about-badge {
            right: 0;
            bottom: -16px;
        }

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

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

        .projects-header {
            flex-direction: column;
            align-items: flex-start;
        }

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

        .contact-form {
            padding: 32px 24px;
        }

        .hero-stats {
            position: relative;
            bottom: auto;
            flex-wrap: wrap;
            justify-content: center;
            margin-top: 48px;
        }

        .hero-stat {
            flex: 1;
            min-width: 100px;
        }

        .hero-stat:first-child {
            border-radius: var(--radius) 0 0 var(--radius);
        }

        .hero-stat:last-child {
            border-radius: 0 var(--radius) var(--radius) 0;
        }

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

        .about-features {
            grid-template-columns: 1fr;
        }

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

        .contact-item {
            flex: 0 0 100%;
            max-width: 100%;
        }
    }

    @media (max-width: 480px) {
        .materials-grid {
            grid-template-columns: 1fr;
        }

        .hero h1 {
            font-size: 38px;
        }

        .container {
            padding: 0 16px;
        }

        .contact-form {
            padding: 24px 16px;
        }
    }

    /* ===== CATEGORY TABS & IMAGES ===== */
    .tabs-wrapper {
        margin-top: 40px;
    }

    .tabs-header {
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
        justify-content: center;
        margin-bottom: 40px;
    }

    .tab-btn {
        background: var(--white);
        border: 2px solid var(--gray-100);
        padding: 12px 24px;
        font-family: var(--font-display);
        font-weight: 700;
        font-size: 16px;
        letter-spacing: .05em;
        text-transform: uppercase;
        color: var(--gray-700);
        border-radius: 30px;
        cursor: pointer;
        transition: var(--transition);
    }

    .tab-btn:hover {
        border-color: var(--blue-light);
        color: var(--blue);
    }

    .tab-btn.active {
        background: var(--blue);
        border-color: var(--blue);
        color: var(--white);
        box-shadow: var(--shadow-sm);
    }

    .tab-content {
        display: none;
        animation: fadeIn 0.4s ease-in-out;
    }

    .tab-content.active {
        display: grid;
    }

    .cat-img-wrap {
        width: 100%;
        height: 180px;
        margin-bottom: 20px;
        border-radius: var(--radius-sm);
        overflow: hidden;
    }

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

    .material-card:hover .cat-img-wrap img {
        transform: scale(1.08);
    }

    .material-card {
        align-items: flex-start;
        display: flex;
        flex-direction: column;
    }

    @keyframes fadeIn {
        from {
            opacity: 0;
            transform: translateY(10px);
        }

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