:root {
    --color-primary: #1a1a1a;
    --color-accent: #f7941d;
    --color-accent-hover: #e8850f;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-bg: #ffffff;
    --color-bg-alt: #f5f5f5;
    --color-overlay: rgba(0, 0, 0, 0.35);
    --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-body: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --section-padding: 100px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-bg);
    overflow-x: hidden;
}

/* ?? Hero ?? */
.hero-section {
    position: relative;
    height: 100vh;
    height: 100dvh;
    min-height: 600px;
    overflow: hidden;
}

.hero-slide-bg {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-color: #2c2c2c;
}

.hero-slide-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--color-overlay);
}

.carousel-item {
    position: relative;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    z-index: 10;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

.hero-content {
    pointer-events: auto;
    padding: 0 20px;
    max-width: 900px;
}

.hero-brand-img {
    max-width: min(600px, 90vw);
    height: auto;
    margin-bottom: 2.5rem;
}

.hero-nav {
    display: flex;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
    gap: 12px;
    width: 100%;
    max-width: 960px;
    margin: 4rem auto 0;
}

.hero-nav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    line-height: 0;
    transition: transform 0.2s ease;
}

.hero-nav-btn:hover {
    transform: scale(1.04);
}

.hero-nav-btn .btn-img {
    height: 44px;
    width: auto;
}

.hero-nav-btn .btn-hover {
    display: none;
}

.hero-nav-btn:hover .btn-default {
    display: none;
}

.hero-nav-btn:hover .btn-hover {
    display: inline;
}

.scroll-down {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    color: #fff;
    font-size: 1.8rem;
    text-decoration: none;
    pointer-events: auto;
    animation: bounce 2s infinite;
    opacity: 0.8;
    transition: opacity 0.3s;
}

.scroll-down:hover {
    opacity: 1;
    color: var(--color-accent);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

.hero-control {
    z-index: 11;
    width: 5%;
    opacity: 0.5;
    transition: opacity 0.3s;
}

.hero-control:hover {
    opacity: 1;
}

/* ?? Content Sections ?? */
.content-section {
    padding: var(--section-padding) 0;
}

.section-alt {
    background: var(--color-bg-alt);
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 400;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    text-align: center;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.section-title-brand {
    color: var(--color-accent);
    font-weight: 700;
    letter-spacing: 0.12em;
    margin-bottom: 2.5rem;
}

.content-section-about {
    padding-bottom: 2rem;
}

.content-section-references {
    padding-top: 2rem;
    background: var(--color-bg);
}

.content-section-about .container,
.content-section-references .container {
    max-width: 1320px;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

.section-divider {
    width: 60px;
    height: 2px;
    background: var(--color-accent);
    margin: 0 auto 3rem;
}

.section-text {
    max-width: 1120px;
    margin: 0 auto;
    line-height: 1.9;
    color: var(--color-text-light);
    font-size: 1rem;
}

.content-section-about .section-text {
    max-width: none;
    width: 100%;
}

.section-text p {
    margin-bottom: 1.25rem;
}

.section-text p:last-child {
    margin-bottom: 0;
}

.section-text-center {
    text-align: center;
}

.section-text-center p {
    margin-bottom: 1.5rem;
}

/* ── References ── */
.references-grid {
    max-width: none;
    width: 100%;
    margin: 0 auto;
}

.reference-item {
    text-align: center;
}

.reference-circle {
    width: 150px;
    height: 150px;
    margin: 0 auto;
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: #fff;
}

.reference-logo {
    max-height: 100%;
    max-width: 100%;
    object-fit: contain;
}

.reference-name {
    margin-top: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    font-size: 0.95rem;
    line-height: 1.35;
}

.reference-name span {
    display: block;
}

@media (max-width: 576px) {
    .reference-circle {
        width: 120px;
        height: 120px;
        padding: 18px;
    }

    .reference-name {
        font-size: 0.85rem;
    }
}

/* ── Sustainability Section ── */
.sustainability-section {
    background: #43a047;
    padding: 80px 0 90px;
    color: #fff;
}

.sustainability-container {
    max-width: 1320px;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

.sustainability-title {
    font-family: var(--font-heading);
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    text-align: center;
    color: #fff;
    margin-bottom: 2.5rem;
}

.sustainability-intro {
    max-width: none;
    width: 100%;
    margin: 0 auto 3rem;
    text-align: center;
}

.sustainability-intro p {
    color: #fff;
    line-height: 1.85;
    margin-bottom: 1.25rem;
    font-size: 1rem;
}

.sustainability-intro p:last-child {
    margin-bottom: 0;
}

.sustainability-columns {
    align-items: stretch;
}

.sustainability-column {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.sustainability-card {
    border-radius: 18px;
    overflow: hidden;
}

.sustainability-card-logo {
    background: transparent;
}

.sustainability-card-text {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 28px 24px;
    background: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.22);
    min-height: 300px;
}

.sustainability-card-text p {
    margin: 0;
    color: #fff;
    text-align: center;
    line-height: 1.75;
    font-size: 0.95rem;
}

.sustainability-logo-img {
    display: block;
    width: 100%;
    height: auto;
}

.sustainability-logo-link {
    display: block;
    line-height: 0;
    transition: opacity 0.2s ease;
}

.sustainability-logo-link:hover {
    opacity: 0.9;
}

.sustainability-column-report {
    justify-content: flex-start;
}

.sustainability-card-report {
    background: transparent;
    border: none;
    padding: 0;
    display: flex;
    align-items: flex-start;
    justify-content: center;
}

.sustainability-report-link {
    display: block;
    width: 100%;
    line-height: 0;
    transition: transform 0.2s ease, opacity 0.2s;
}

.sustainability-report-link:hover {
    transform: scale(1.02);
    opacity: 0.95;
}

.sustainability-report-link img {
    width: 100%;
    height: auto;
}

@media (max-width: 991px) {
    .sustainability-section {
        padding: 60px 0 70px;
    }

    .sustainability-card-text {
        min-height: auto;
    }

    .sustainability-column {
        margin-bottom: 0.5rem;
    }
}

/* ── Contact ── */
.contact-section {
    background: #fff;
    padding: 56px 0 16px;
}

.contact-container {
    width: 100%;
    max-width: 1320px;
    margin: 0 auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

.contact-title {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 3vw, 1.85rem);
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    text-align: center;
    color: var(--color-accent);
    margin-bottom: 2.25rem;
}

.contact-inner {
    display: grid;
    grid-template-columns: minmax(240px, 26%) 1fr;
    gap: 2.5rem 4rem;
    align-items: start;
    width: 100%;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.35rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    font-size: 0.92rem;
}

.contact-item i {
    font-size: 1.15rem;
    color: var(--color-accent);
    width: 20px;
    flex-shrink: 0;
    text-align: center;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.contact-item a,
.contact-item span {
    color: #3a3a3a;
    text-decoration: none;
    transition: color 0.2s;
    line-height: 1.45;
}

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

.contact-form-wrap {
    width: 100%;
}

.contact-form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.85rem;
}

.contact-field-full {
    grid-column: 1 / -1;
}

.contact-form .form-control {
    border: 1px solid #bdbdbd;
    border-radius: 14px;
    padding: 0.9rem 1rem;
    font-size: 0.92rem;
    background: #fff;
    min-height: 48px;
    transition: border-color 0.2s;
    box-shadow: none;
}

.contact-form textarea.form-control {
    min-height: 190px;
    resize: vertical;
    padding-top: 0.9rem;
}

.contact-form .form-control::placeholder {
    color: #7a7a7a;
}

.contact-form .form-control:focus {
    border-color: var(--color-accent);
    box-shadow: none;
}

.btn-submit {
    background: var(--color-accent);
    color: #fff;
    border: none;
    padding: 0.9rem 1rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 14px;
    min-height: 48px;
    transition: background 0.2s;
}

.btn-submit:hover {
    background: var(--color-accent-hover);
    color: #fff;
}

@media (max-width: 768px) {
    .contact-inner {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

/* ── Footer ── */
.site-footer {
    background: #fff;
    color: #a8a8a8;
    padding: 28px 0 36px;
    font-size: 0.8rem;
    letter-spacing: 0;
}

.site-footer p {
    margin: 0;
}

/* ── Responsive ── */
@media (max-width: 768px) {
    :root {
        --section-padding: 70px;
    }

    .hero-content {
        max-width: 100%;
        padding: 0 16px;
    }

    .hero-brand-img {
        margin-bottom: 1.25rem;
    }

    .hero-nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 10px;
        margin-top: 1.5rem;
        max-width: 340px;
        width: 100%;
        padding: 0;
    }

    .hero-nav-btn {
        flex: 0 0 calc(50% - 5px);
        max-width: calc(50% - 5px);
    }

    .hero-nav-btn .btn-img {
        width: 100%;
        height: auto;
        max-height: 42px;
        object-fit: contain;
    }

    .hero-nav-btn:hover {
        transform: none;
    }

    .scroll-down {
        bottom: 18px;
        font-size: 1.5rem;
    }

    .hero-control {
        width: 12%;
    }
}

@media (max-width: 400px) {
    .hero-nav {
        max-width: 300px;
        gap: 8px;
    }

    .hero-nav-btn {
        flex: 0 0 calc(50% - 4px);
        max-width: calc(50% - 4px);
    }

    .hero-nav-btn .btn-img {
        max-height: 36px;
    }
}

@media (hover: none) and (pointer: coarse) {
    .hero-nav-btn:hover .btn-default {
        display: inline;
    }

    .hero-nav-btn:hover .btn-hover {
        display: none;
    }

    .hero-nav-btn:active {
        opacity: 0.85;
    }
}