/* =========================================================
   SÜRDÜRÜLEBİLİRLİK SAYFASI - ÖZEL STİLLER
========================================================= */

:root {
    --navy: #0E1B2B;
    --text-dark: #343434;
    --text-gray: #4B5563;
    --surface: #F7F8FA;
}


/* =========================================================
   AKTİF MENÜ
========================================================= */

.main-nav .nav-link.active {
    color: var(--accent);
}


/* =========================================================
   CONTAINER (SAYFA GENELİ - HEADER İLE HİZALI)
========================================================= */

.container-xl {
    max-width: 100%;
    padding-left: 96px;
    padding-right: 96px;
}

@media (max-width: 1199px) {
    .container-xl {
        padding-left: 40px;
        padding-right: 40px;
    }
}

@media (max-width: 575px) {
    .container-xl {
        padding-left: 20px;
        padding-right: 20px;
    }
}


/* =========================================================
   SAYFA HERO / BREADCRUMB
========================================================= */

.page-hero {
    position: relative;
    display: flex;
    align-items: flex-start;
    height: 809px;
    padding-top: 138px;
    background-color: var(--navy);
    background-image: url("img/surdurulebilirlik-banner.png");
    background-size: cover;
    background-position: center;
}

.page-breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 0 30px;
    font-family: "Poppins";
    font-size: 14px;
    font-weight: 400;
    line-height: 1.32;
    color: #fff;
}

.page-breadcrumb-icon {
    width: 16px;
    height: 16px;
    filter: brightness(0) invert(1);
    opacity: 0.9;
}

.page-breadcrumb a {
    color: rgba(255, 255, 255, 0.85);
    transition: color 0.2s ease;
}

.page-breadcrumb a:hover {
    color: var(--accent);
}

.page-breadcrumb .sep {
    color: rgba(255, 255, 255, 0.5);
}

.page-breadcrumb .current {
    color: #fff;
}

.page-title {
    margin: 0;
    max-width: 682px;
    font-family: "Poppins";
    font-weight: 600;
    font-size: 42px;
    line-height: 1.32;
    color: #fff;
}


/* =========================================================
   INTRO KART (HERO ÜZERİNE BİNEN NAVY KART)
========================================================= */

.sustain-intro {
    position: relative;
    display: flow-root;
    padding: 0 0 100px;
    background: #fff;
}

.sustain-intro-card {
    position: relative;
    z-index: 2;
    margin-top: -343px;
    padding: 112px 105px;
    background: var(--navy);
}

.sustain-eyebrow {
    margin: 0 0 16px;
    font-family: "Poppins";
    font-weight: 500;
    font-size: 26px;
    line-height: 1.2;
    color: rgba(255, 255, 255, 0.5);
}

.sustain-heading {
    max-width: 700px;
    margin: 0 0 24px;
    font-family: "Poppins";
    font-weight: 700;
    font-size: 42px;
    line-height: 1.33;
    color: #fff;
}

.sustain-desc {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 1019px;
    margin: 0 0 62px;
}

.sustain-desc p {
    margin: 0;
    font-family: "Poppins";
    font-weight: 400;
    font-size: 16px;
    line-height: 26px;
    color: rgba(255, 255, 255, 0.74);
}

.sustain-icon-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px 40px;
}

.sustain-icon-card img {
    width: 92px;
    height: 92px;
    margin-bottom: 6px;
}

.sustain-icon-card h4 {
    margin: 0 0 10px;
    font-family: "Poppins";
    font-weight: 600;
    font-size: 20px;
    line-height: 1.5;
    color: #fff;
}

.sustain-icon-card p {
    margin: 0;
    font-family: "Poppins";
    font-weight: 400;
    font-size: 16px;
    line-height: 26px;
    color: rgba(255, 255, 255, 0.74);
}


/* =========================================================
   ALÜMİNYUM VE SÜRDÜRÜLEBİLİRLİK
========================================================= */

.sustain-about {
    padding: 40px 0 100px;
    background: #fff;
}

.sustain-about-heading {
    margin: 0 0 24px;
    font-family: "Poppins";
    font-weight: 600;
    font-size: 42px;
    line-height: 1.32;
    color: var(--text-dark);
}

.sustain-about-text {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.sustain-about-text p {
    margin: 0;
    max-width: 611px;
    font-family: "Poppins";
    font-weight: 400;
    font-size: 16px;
    line-height: 26px;
    color: var(--text-dark);
}

.sustain-about-media {
    width: 100%;
    height: clamp(240px, 27vw, 511px);
    overflow: hidden;
}

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


/* =========================================================
   SÜRDÜRÜLEBİLİR BİR GELECEK İÇİN
========================================================= */

.sustain-future-section {
    padding: 100px 0;
    margin-bottom: 100px;
    background: var(--navy);
}

.sustain-future-media {
    width: 100%;
    height: clamp(240px, 26vw, 506px);
    overflow: hidden;
}

.sustain-future-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.sustain-future-heading {
    margin: 0 0 24px;
    font-family: "Poppins";
    font-weight: 600;
    font-size: 42px;
    line-height: 1.32;
    color: #fff;
}

.sustain-future-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 24px;
}

.sustain-future-list h4 {
    margin: 0 0 4px;
    font-family: "Poppins";
    font-weight: 600;
    font-size: 20px;
    line-height: 1.32;
    color: #F7F8FA;
}

.sustain-future-list p {
    margin: 0;
    font-family: "Poppins";
    font-weight: 400;
    font-size: 16px;
    line-height: 26px;
    color: #F7F8FA;
}

.sustain-future-text {
    margin: 0;
    font-family: "Poppins";
    font-weight: 400;
    font-size: 16px;
    line-height: 26px;
    color: rgba(255, 255, 255, 0.74);
}


/* =========================================================
   CTA (İLETİŞİME GEÇİN)
========================================================= */

.cta-section {
    position: relative;
    padding: 80px 0;
    background-color: var(--navy);
    background-image:
        linear-gradient(0deg, rgba(14, 27, 43, 0.86), rgba(14, 27, 43, 0.86)),
        url("/img/iletisim-cta-bg.jpg");
    background-size: cover;
    background-position: center;
    text-align: center;
}

.cta-eyebrow {
    margin: 0 0 30px;
    font-family: "Poppins";
    font-weight: 600;
    font-size: 11px;
    line-height: 16px;
    letter-spacing: 1.98px;
    text-transform: uppercase;
    color: var(--accent);
}

.cta-title {
    max-width: 700px;
    margin: 0 auto 30px;
    font-family: "Poppins";
    font-weight: 600;
    font-size: clamp(28px, 3.5vw, 42px);
    line-height: 1.25;
    letter-spacing: 0.02em;
    color: #fff;
}

.cta-desc {
    max-width: 622px;
    margin: 0 auto 30px;
    font-family: "Poppins";
    font-weight: 400;
    font-size: 18px;
    line-height: 28px;
    color: #F7F8FA;
}

.cta-btns {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

.cta-btns .btn {
    padding: 16px 46px;
    font-family: "Poppins";
    font-weight: 500;
    font-size: 16px;
}

.btn-outline-cta {
    color: #fff !important;
    border: 1px solid #C7CDD4;
    background: transparent;
}

.btn-outline-cta:hover {
    color: var(--navy) !important;
    background: #fff;
    border-color: #fff;
}


/* =========================================================
   RESPONSIVE
========================================================= */

@media (max-width: 1199px) {

    .sustain-icon-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        row-gap: 40px;
    }

    .sustain-future-section .row {
        row-gap: 40px;
    }
}

@media (max-width: 991px) {

    .page-hero {
        height: 560px;
    }

    .page-title {
        font-size: 34px;
    }

    .sustain-intro-card {
        margin-top: -220px;
        padding: 50px 40px;
    }

    .sustain-heading,
    .sustain-about-heading,
    .sustain-future-heading {
        font-size: 32px;
    }
}

@media (max-width: 767px) {

    .page-hero {
        height: 320px;
        padding-top: 100px;
    }

    .page-title {
        font-size: 28px;
    }

    .sustain-intro-card {
        margin-top: -80px;
        padding: 40px 24px;
    }

    .sustain-eyebrow {
        font-size: 20px;
    }

    .sustain-heading,
    .sustain-about-heading,
    .sustain-future-heading {
        font-size: 26px;
    }

    .sustain-icon-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .sustain-about {
        padding: 30px 0 60px;
    }

    .sustain-future-section {
        padding: 60px 0;
        margin-bottom: 60px;
    }

    .cta-section {
        padding: 60px 0;
    }
}

@media (max-width: 575px) {

    .page-title {
        font-size: 24px;
    }

    .sustain-intro-card {
        margin-top: -50px;
        padding: 30px 20px;
    }

    .cta-btns {
        flex-direction: column;
        width: 100%;
    }

    .cta-btns .btn {
        width: 100%;
    }
}