:root {
    --ink: #102033;
    --muted: #617086;
    --blue: #0c91d2;
    --blue-dark: #0668a8;
    --green: #36b85f;
    --green-dark: #208245;
    --mint: #eafaf2;
    --sky: #e9f8ff;
    --line: #dbe9ef;
    --white: #ffffff;
    --soft: #f6fbfd;
    --shadow: 0 24px 70px rgba(14, 73, 105, .14);
    --radius: 8px;
}

* { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Inter", Arial, sans-serif;
    color: var(--ink);
    background: var(--white);
    line-height: 1.6;
}

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

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

.container {
    width: min(1180px, calc(100% - 40px));
    margin: 0 auto;
}

.site-header {
    position: fixed;
    top: 18px;
    left: 0;
    right: 0;
    z-index: 50;
    transition: transform .25s ease, top .25s ease;
}

.header-inner {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 14px 18px 14px 22px;
    border: 1px solid rgba(255,255,255,.78);
    background: rgba(255,255,255,.9);
    box-shadow: 0 18px 55px rgba(27, 73, 92, .12);
    backdrop-filter: blur(18px);
    border-radius: 8px;
}

.site-header.is-scrolled {
    top: 0;
}

.brand img {
    width: 218px;
    height: auto;
}

.desktop-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px;
    border-radius: 8px;
    background: rgba(245, 251, 253, .88);
}

.desktop-nav a {
    padding: 12px 16px;
    border-radius: 8px;
    color: #24364c;
    font-weight: 800;
    font-size: 14px;
}

.desktop-nav a.active,
.desktop-nav a:hover {
    color: var(--blue-dark);
    background: var(--white);
    box-shadow: 0 8px 22px rgba(10, 93, 139, .1);
}

.header-call,
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 0 20px;
    border-radius: 8px;
    font-weight: 900;
    border: 1px solid transparent;
    cursor: pointer;
    white-space: nowrap;
}

.header-call {
    color: var(--white);
    background: linear-gradient(135deg, var(--blue-dark), var(--green-dark));
    box-shadow: 0 15px 36px rgba(20, 121, 147, .22);
}

.btn-primary {
    color: var(--white);
    background: linear-gradient(135deg, var(--blue), var(--green));
    box-shadow: 0 16px 38px rgba(13, 139, 180, .22);
}

.btn-ghost {
    color: var(--ink);
    background: var(--white);
    border-color: var(--line);
}

.btn-light {
    color: var(--blue-dark);
    background: var(--white);
}

.menu-toggle {
    width: 48px;
    height: 48px;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
}

.menu-toggle span {
    width: 22px;
    height: 2px;
    background: var(--ink);
}

.drawer-shade {
    position: fixed;
    inset: 0;
    z-index: 70;
    background: rgba(16, 32, 51, .38);
    opacity: 0;
    pointer-events: none;
    transition: opacity .25s ease;
}

.drawer-shade.is-open {
    opacity: 1;
    pointer-events: auto;
}

.mobile-drawer {
    position: fixed;
    top: 0;
    right: 0;
    width: min(360px, 88vw);
    height: 100vh;
    z-index: 80;
    padding: 22px;
    background: var(--white);
    box-shadow: -20px 0 70px rgba(16, 32, 51, .18);
    transform: translateX(105%);
    transition: transform .28s ease;
}

.mobile-drawer.is-open {
    transform: translateX(0);
}

.drawer-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 26px;
}

.drawer-head img { width: 205px; }

.drawer-head button {
    width: 44px;
    height: 44px;
    border: 0;
    border-radius: 8px;
    background: var(--sky);
    font-size: 28px;
    color: var(--ink);
}

.mobile-drawer nav {
    display: grid;
    gap: 10px;
    margin-bottom: 24px;
}

.mobile-drawer nav a {
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
    font-weight: 900;
}

.hero {
    position: relative;
    min-height: 820px;
    padding: 160px 0 70px;
    overflow: hidden;
    background: linear-gradient(90deg, rgba(255,255,255,.98) 0%, rgba(246,251,253,.94) 46%, rgba(232,250,255,.62) 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(90deg, rgba(255,255,255,.97) 0%, rgba(255,255,255,.82) 42%, rgba(255,255,255,.28) 100%),
        url("../img/su-aritma-dunyasi-slayt1.jpg") center right / cover no-repeat;
    opacity: .95;
}

.hero::after {
    content: "";
    position: absolute;
    left: -8%;
    right: -8%;
    bottom: -120px;
    height: 240px;
    background: radial-gradient(ellipse at center, rgba(54,184,95,.16), transparent 65%);
}

.hero-grid {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: minmax(0, 1.02fr) minmax(360px, .98fr);
    align-items: center;
    gap: 46px;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    color: var(--blue-dark);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0;
    text-transform: uppercase;
}

.eyebrow::before {
    content: "";
    width: 32px;
    height: 2px;
    background: var(--green);
}

h1, h2, h3, p {
    margin-top: 0;
}

h1 {
    max-width: 760px;
    margin-bottom: 22px;
    font-size: clamp(44px, 6vw, 82px);
    line-height: .96;
    letter-spacing: 0;
}

h2 {
    margin-bottom: 16px;
    font-size: clamp(30px, 4vw, 54px);
    line-height: 1.05;
    letter-spacing: 0;
}

h3 {
    margin-bottom: 10px;
    font-size: 20px;
    line-height: 1.2;
}

.hero-copy p,
.section-head p,
.split-copy p,
.page-hero p,
.about-text p,
.cta-inner p {
    color: var(--muted);
    font-size: 18px;
}

.hero-copy p {
    max-width: 660px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 30px 0 28px;
}

.hero-location {
    display: grid;
    gap: 2px;
    max-width: 560px;
    padding-left: 18px;
    border-left: 3px solid var(--green);
}

.hero-location span {
    color: var(--muted);
    font-size: 14px;
}

.hero-visual {
    position: relative;
    min-height: 440px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-visual::before {
    content: "";
    position: absolute;
    width: 520px;
    max-width: 88%;
    aspect-ratio: 1;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(12,145,210,.18), rgba(54,184,95,.12) 48%, transparent 68%);
    filter: blur(2px);
}

.hero-device {
    position: relative;
    z-index: 2;
    width: min(540px, 96%);
    filter: drop-shadow(0 36px 42px rgba(17, 54, 77, .24));
}

.hero-note {
    position: absolute;
    z-index: 3;
    right: 6%;
    bottom: 9%;
    display: grid;
    gap: 2px;
    padding: 16px 18px;
    border: 1px solid rgba(255,255,255,.7);
    border-radius: 8px;
    background: rgba(255,255,255,.88);
    box-shadow: var(--shadow);
}

.hero-note span {
    color: var(--blue-dark);
    font-size: 12px;
    font-weight: 900;
}

.hero-strip {
    position: relative;
    z-index: 4;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    margin-top: 70px;
    overflow: hidden;
    border: 1px solid rgba(219,233,239,.9);
    border-radius: 8px;
    background: rgba(255,255,255,.92);
    box-shadow: var(--shadow);
}

.hero-strip div {
    min-height: 104px;
    display: grid;
    align-content: center;
    gap: 4px;
    padding: 22px 28px;
    border-right: 1px solid var(--line);
}

.hero-strip div:last-child { border-right: 0; }

.hero-strip strong {
    font-size: 17px;
}

.hero-strip span {
    color: var(--muted);
    font-size: 14px;
}

.section {
    padding: 96px 0;
}

.section-head {
    max-width: 760px;
    margin-bottom: 36px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.product-card {
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    box-shadow: 0 14px 34px rgba(22, 70, 92, .08);
    overflow: hidden;
    transition: transform .25s ease, box-shadow .25s ease;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.product-image {
    height: 245px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 26px;
    background: linear-gradient(145deg, var(--sky), var(--mint));
}

.product-image img {
    max-height: 190px;
    object-fit: contain;
}

.product-body {
    padding: 24px;
}

.product-body span {
    display: block;
    margin-bottom: 8px;
    color: var(--green-dark);
    font-size: 13px;
    font-weight: 900;
}

.product-body p,
.benefit-card p,
.service-panel p,
.process-card p,
.footer-brand p,
.footer-col p {
    color: var(--muted);
}

.section-action {
    display: flex;
    justify-content: center;
    margin-top: 34px;
}

.soft-band {
    background:
        linear-gradient(180deg, rgba(233,248,255,.72), rgba(246,251,253,.95)),
        radial-gradient(circle at 20% 20%, rgba(54,184,95,.16), transparent 32%);
}

.split-grid {
    display: grid;
    grid-template-columns: .95fr 1.05fr;
    gap: 58px;
    align-items: center;
}

.split-grid.reverse {
    grid-template-columns: 1fr .95fr;
}

.split-media img {
    width: 100%;
    min-height: 420px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.split-copy {
    max-width: 620px;
}

.check-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-top: 28px;
}

.check-list span {
    padding: 14px 16px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    color: #244056;
    font-weight: 800;
}

.benefit-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.benefit-card {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    box-shadow: 0 12px 32px rgba(22, 70, 92, .08);
}

.benefit-card img {
    width: 100%;
    height: 190px;
    object-fit: cover;
}

.benefit-card div {
    padding: 22px;
}

.references {
    background: var(--soft);
}

.logo-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 14px;
}

.logo-item {
    min-height: 94px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
}

.logo-item img {
    max-height: 44px;
    object-fit: contain;
    filter: grayscale(1);
    opacity: .82;
}

.cta-band {
    padding: 76px 0;
    color: var(--white);
    background:
        linear-gradient(135deg, rgba(6,104,168,.96), rgba(32,130,69,.94)),
        url("../img/su-aritma-dunyasi-slayt3.jpg") center / cover no-repeat;
}

.cta-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 34px;
}

.cta-inner > div {
    max-width: 760px;
}

.cta-inner p,
.cta-inner .eyebrow {
    color: rgba(255,255,255,.86);
}

.cta-inner .eyebrow::before {
    background: var(--white);
}

.page-hero {
    padding: 158px 0 74px;
    background:
        linear-gradient(90deg, rgba(255,255,255,.96), rgba(233,248,255,.9)),
        radial-gradient(circle at 80% 10%, rgba(54,184,95,.18), transparent 36%);
}

.page-hero-grid {
    display: grid;
    grid-template-columns: 1fr .82fr;
    gap: 46px;
    align-items: center;
}

.page-hero h1 {
    font-size: clamp(42px, 5vw, 72px);
}

.page-hero-img {
    width: 100%;
    aspect-ratio: 1.35;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

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

.all-products .product-card {
    display: grid;
    grid-template-columns: 220px 1fr;
}

.all-products .product-image {
    height: 100%;
    min-height: 250px;
}

.text-link {
    display: inline-flex;
    margin-top: 10px;
    color: var(--blue-dark);
    font-weight: 900;
}

.service-grid,
.process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}

.service-panel,
.process-card {
    min-height: 260px;
    padding: 28px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    box-shadow: 0 12px 32px rgba(22, 70, 92, .08);
}

.service-panel span,
.process-card span {
    display: inline-flex;
    margin-bottom: 34px;
    color: var(--green-dark);
    font-weight: 900;
}

.about-grid {
    display: grid;
    grid-template-columns: .82fr 1.18fr;
    gap: 56px;
}

.about-text {
    max-width: 760px;
}

.contact-hero {
    background:
        linear-gradient(90deg, rgba(255,255,255,.96), rgba(233,248,255,.86)),
        url("../img/alkali-su.jpg") center / cover no-repeat;
}

.contact-card {
    padding: 34px;
    border: 1px solid rgba(255,255,255,.7);
    border-radius: 8px;
    background: rgba(255,255,255,.88);
    box-shadow: var(--shadow);
}

.contact-card strong {
    display: block;
    margin-bottom: 8px;
    font-size: 36px;
    line-height: 1;
}

.contact-card span {
    display: block;
    margin-bottom: 18px;
    color: var(--blue-dark);
    font-weight: 900;
}

.contact-grid {
    display: grid;
    grid-template-columns: .8fr 1.2fr;
    gap: 34px;
}

.contact-info {
    display: grid;
    gap: 14px;
}

.info-row {
    display: grid;
    gap: 4px;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--soft);
}

.info-row span {
    color: var(--green-dark);
    font-size: 13px;
    font-weight: 900;
}

.contact-form {
    padding: 34px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    box-shadow: var(--shadow);
}

.contact-form label {
    display: grid;
    gap: 8px;
    margin-bottom: 16px;
    color: #244056;
    font-weight: 800;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    width: 100%;
    min-height: 50px;
    padding: 12px 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--ink);
    background: var(--soft);
    font: inherit;
    outline: none;
}

.contact-form textarea {
    resize: vertical;
}

.site-footer {
    color: var(--white);
    background: #0c1f2e;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr .8fr .8fr 1fr;
    gap: 38px;
    padding: 64px 0 42px;
}

.footer-brand img {
    width: 220px;
    margin-bottom: 18px;
    padding: 12px;
    border-radius: 8px;
    background: var(--white);
}

.footer-col {
    display: grid;
    align-content: start;
    gap: 10px;
}

.footer-col h3 {
    color: var(--white);
}

.footer-col a,
.footer-col p,
.footer-brand p {
    color: rgba(255,255,255,.7);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 22px 0;
    border-top: 1px solid rgba(255,255,255,.12);
    color: rgba(255,255,255,.68);
    font-size: 14px;
}

.whatsapp-float {
    position: fixed;
    right: 22px;
    bottom: 22px;
    z-index: 60;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0 20px;
    border-radius: 8px;
    color: var(--white);
    background: #1fb65d;
    box-shadow: 0 16px 38px rgba(31, 182, 93, .3);
    font-weight: 900;
}

.reveal {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity .65s ease, transform .65s ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: none;
}

@media (max-width: 1040px) {
    .desktop-nav,
    .header-call {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .hero-grid,
    .page-hero-grid,
    .split-grid,
    .split-grid.reverse,
    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .hero {
        min-height: 0;
        padding-top: 134px;
    }

    .hero-visual {
        min-height: 360px;
    }

    .hero-strip,
    .service-grid,
    .process-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .logo-grid {
        grid-template-columns: repeat(4, 1fr);
    }

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

@media (max-width: 720px) {
    .container {
        width: min(100% - 24px, 1180px);
    }

    .site-header {
        top: 10px;
    }

    .header-inner {
        min-height: 68px;
        padding: 10px 12px;
    }

    .brand img {
        width: 182px;
    }

    .hero,
    .page-hero {
        padding-top: 116px;
    }

    h1 {
        font-size: clamp(38px, 14vw, 56px);
    }

    h2 {
        font-size: clamp(28px, 10vw, 40px);
    }

    .hero-copy p,
    .section-head p,
    .split-copy p,
    .page-hero p,
    .about-text p,
    .cta-inner p {
        font-size: 16px;
    }

    .hero-actions {
        align-items: stretch;
        flex-direction: column;
    }

    .hero-actions .btn,
    .cta-inner .btn {
        width: 100%;
    }

    .hero-visual {
        min-height: 280px;
    }

    .hero-note {
        right: 0;
        bottom: 0;
    }

    .hero-strip,
    .product-grid,
    .benefit-grid,
    .service-grid,
    .process-grid,
    .logo-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .hero-strip div {
        min-height: 86px;
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .hero-strip div:last-child {
        border-bottom: 0;
    }

    .all-products .product-card {
        grid-template-columns: 1fr;
    }

    .all-products .product-image {
        min-height: 230px;
    }

    .check-list {
        grid-template-columns: 1fr;
    }

    .split-media img {
        min-height: 300px;
    }

    .cta-inner,
    .footer-bottom {
        align-items: flex-start;
        flex-direction: column;
    }

    .contact-form {
        padding: 24px;
    }

    .whatsapp-float {
        left: 12px;
        right: 12px;
        bottom: 12px;
    }
}