:root {
        --navy: #0b1b63;
        --navy2: #09154d;
        --light: #f2f4f7;
        --card: #ffffff;
        --text: #0f172a;
        --muted: #64748b;
        --border: #e7eef2;
        --shadow: 0 14px 40px rgba(15, 23, 42, .10);
        --radius: 20px;

        --accentRed: #ef4444;
        --accentBlue: #1d4ed8;
        --accentOrange: #fb923c;
        --focus: rgba(29, 78, 216, .14);
    }

    * {
        box-sizing: border-box
    }

    html {
        scroll-behavior: smooth
    }

    body {
        margin: 0;
        font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
        color: var(--text);
        background: var(--light);
    }

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

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

    .container {
        width: min(1100px, 100%);
        margin: 0 auto;
        padding: 0 18px;
    }

    /* Hero (flyer style) */
    .hero {
        position: relative;
        min-height: 560px;
        display: flex;
        align-items: stretch;
        overflow: hidden;
        background:
            linear-gradient(90deg, rgba(12, 26, 48, .90) 0%, rgba(12, 26, 48, .70) 52%, rgba(12, 26, 48, .38) 100%),
            url("../img/hero/radiator.png");
        background-size: cover;
        background-position: center;
    }

    .heroInner {
        width: 100%;
        padding-bottom: 60px;
        padding-left: 10%;
        padding-right: 10%;
        padding-top: 25px;
    }

    .topbar {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 14px;
        padding: 18px 0;
    }

    .brand {
        display: flex;
        align-items: center;
        gap: 12px;
        min-width: 220px;
    }

    .brand img {
        width: 270px;
        height: auto;
    }

    .nav {
        display: flex;
        gap: 18px;
        align-items: center;
        flex-wrap: wrap;
    }

    .nav a {
        color: rgba(255, 255, 255, .92);
        font-weight: 800;
        font-size: 15px;
        padding: 10px 12px;
        border-radius: 12px;
        border: 1px solid transparent;
    }

    .nav a:hover {
        background: rgba(255, 255, 255, .10);
        border-color: rgba(255, 255, 255, .16);
    }

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        padding: 11px 14px;
        border-radius: 12px;
        border: 1px solid rgba(255, 255, 255, .18);
        background: rgba(255, 255, 255, .10);
        color: #fff;
        font-weight: 900;
        cursor: pointer;
        user-select: none;
    }

    .btn:hover {
        background: rgba(255, 255, 255, .14)
    }

    .btn.primary {
        background: #ffffff;
        color: #0f172a;
        border-color: #ffffff;
    }

    .btn.primary:hover {
        filter: brightness(.98)
    }

    .btn:focus,
    .nav a:focus,
    summary:focus,
    input:focus,
    select:focus {
        outline: none;
        box-shadow: 0 0 0 4px var(--focus);
    }

    .heroContent {
        padding: 22px 0 0;
        max-width: 100%;
    }

    .heroTitle {
        margin: 18px 0 12px;
        color: #fff;
        font-weight: 950;
        font-size: 58px;
        line-height: 1.02;
        letter-spacing: .2px;
    }

    .heroLead {
        margin: 0;
        color: rgba(255, 255, 255, .88);
        font-weight: 600;
        font-size: 18px;
        line-height: 1.55;
        max-width: 62ch;
    }

    .heroSub {
        margin-top: 18px;
        color: rgba(255, 255, 255, .80);
        font-weight: 650;
        font-size: 16px;
        line-height: 1.55;
        max-width: 70ch;
    }

    .heroCtas {
        margin-top: 18px;
        display: flex;
        gap: 12px;
        flex-wrap: wrap;
        align-items: center;
    }

    /* Sections */
    .section {
        padding: 44px 0
    }

    .sectionHeader {
        text-align: center;
        padding: 6px 0 26px;
    }

    .sectionHeader h2 {
        margin: 0 0 10px;
        font-size: 34px;
        font-weight: 950;
        color: #0f172a;
        letter-spacing: .2px;
    }

    .sectionHeader p {
        margin: 0 auto;
        color: var(--muted);
        font-weight: 600;
        line-height: 1.7;
        max-width: 90ch;
        font-size: 17px;
    }

    .grid3 {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 18px;
        margin-top: 18px;
    }

    .card {
        background: var(--card);
        border: 1px solid var(--border);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        padding: 22px;
        position: relative;
        overflow: hidden;
    }

    .iconWrap {
        width: 56px;
        height: 56px;
        border-radius: 18px;
        display: grid;
        place-items: center;
        margin-bottom: 14px;
    }

    .card h3 {
        margin: 0 0 10px;
        font-size: 20px;
        font-weight: 950;
        letter-spacing: .2px;
    }

    .card p {
        margin: 0;
        color: var(--muted);
        font-weight: 600;
        line-height: 1.7;
    }

    .badgeRow {
        margin-top: 18px;
        display: flex;
        justify-content: center;
        gap: 10px;
        flex-wrap: wrap;
    }

    .pill {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 10px 12px;
        border-radius: 999px;
        background: #fff;
        border: 1px solid var(--border);
        font-weight: 850;
        color: #1f2a44;
        box-shadow: 0 10px 24px rgba(15, 23, 42, .06);
    }

    .pillDot {
        width: 10px;
        height: 10px;
        border-radius: 50%;
        background: var(--accentRed);
    }

    /* StookAlert block */
    .twoCol {
        display: grid;
        grid-template-columns: 1.1fr .9fr;
        gap: 18px;
        align-items: stretch;
        margin-top: 18px;
    }

    .steps {
        display: flex;
        flex-direction: column;
        gap: 12px;
        padding: 22px;
    }

    .kicker {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        width: fit-content;
        padding: 8px 12px;
        border-radius: 999px;
        background: rgba(29, 78, 216, .08);
        border: 1px solid rgba(29, 78, 216, .14);
        font-weight: 950;
        color: #1b2a5a;
        text-transform: uppercase;
        letter-spacing: .2px;
        font-size: 12px;
    }

    .kDot {
        width: 10px;
        height: 10px;
        border-radius: 50%;
        background: var(--accentBlue);
    }

    .step {
        display: flex;
        gap: 12px;
        padding: 12px 0;
        border-top: 1px solid var(--border);
    }

    .step:first-of-type {
        border-top: 0;
        padding-top: 0
    }

    .num {
        width: 36px;
        height: 36px;
        border-radius: 12px;
        display: grid;
        place-items: center;
        font-weight: 950;
        background: rgba(29, 78, 216, .08);
        border: 1px solid rgba(29, 78, 216, .14);
        color: #1b2a5a;
        flex: 0 0 auto;
    }

    .step b {
        display: block;
        font-weight: 950
    }

    .step span {
        display: block;
        color: var(--muted);
        font-weight: 600;
        margin-top: 4px;
        line-height: 1.6;
    }

    .settings {
        padding: 22px;
        background: linear-gradient(180deg, #ffffff, #f7f9ff);
    }

    .settings h3 {
        margin: 0 0 10px 0;
        font-size: 20px;
        font-weight: 950;
        letter-spacing: .2px;
    }

    .settingRow {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 10px;
        padding: 12px 12px;
        border-radius: 14px;
        background: #fff;
        border: 1px solid var(--border);
        margin-bottom: 10px;
        font-weight: 850;
    }

    .alertPreview {
        margin-top: 14px;
        border: 1px solid rgba(239, 68, 68, .22);
        background: linear-gradient(180deg, rgba(239, 68, 68, .08), rgba(239, 68, 68, .04));
        border-radius: 16px;
        padding: 14px;
        display: flex;
        gap: 12px;
        align-items: flex-start;
    }

    .alertIcon {
        width: 38px;
        height: 38px;
        border-radius: 14px;
        display: grid;
        place-items: center;
        background: rgba(239, 68, 68, .12);
        border: 1px solid rgba(239, 68, 68, .20);
        flex: 0 0 auto;
    }

    .alertText b {
        display: block;
        font-size: 14px;
        font-weight: 950
    }

    .alertText span {
        display: block;
        margin-top: 6px;
        color: var(--muted);
        font-weight: 650;
        line-height: 1.5;
    }

    /* FAQ */
    details {
        border-top: 1px solid var(--border);
        padding: 12px 0;
    }

    details:first-child {
        border-top: 0;
        padding-top: 0
    }

    summary {
        cursor: pointer;
        list-style: none;
        font-weight: 950;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
    }

    summary::-webkit-details-marker {
        display: none
    }

    .chev {
        width: 18px;
        height: 18px;
        opacity: .7;
        transition: transform .12s ease;
        flex: 0 0 auto;
    }

    details[open] .chev {
        transform: rotate(180deg)
    }

    .faqText {
        margin-top: 10px;
        color: var(--muted);
        font-weight: 600;
        line-height: 1.7;
        max-width: 80ch;
    }

    /* Footer bars like flyer */
    .footerBar {
        background: var(--navy);
        color: #fff;
        padding: 18px 0;
    }

    .footerBar .row {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 14px;
        flex-wrap: wrap;
    }

    .footerBar .tagline {
        font-weight: 650;
        color: rgba(255, 255, 255, .88);
        line-height: 1.5;
        max-width: 70ch;
    }

    .footerBottom {
        background: #fff;
        border-top: 1px solid var(--border);
        padding: 14px 0;
    }

    .contacts {
        display: flex;
        gap: 24px;
        align-items: center;
        justify-content: center;
        flex-wrap: wrap;
        color: #0f172a;
        font-weight: 750;
    }

    .contacts a {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        color: #0f172a;
        padding: 10px 12px;
        border-radius: 14px;
        border: 1px solid var(--border);
        background: #fff;
    }

    /* Modal */
    .modalBack {
        position: fixed;
        inset: 0;
        background: rgba(15, 23, 42, .55);
        display: none;
        align-items: center;
        justify-content: center;
        padding: 18px;
        z-index: 50;
    }

    .modal {
        width: min(640px, 100%);
        background: #ffffff;
        border-radius: 18px;
        border: 1px solid var(--border);
        box-shadow: 0 26px 70px rgba(15, 23, 42, .45);
        overflow: hidden;
    }

    .modalHead {
        padding: 16px 16px 12px;
        border-bottom: 1px solid var(--border);
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        gap: 10px;
    }

    .modalHead b {
        font-size: 18px;
        font-weight: 950
    }

    .modalHead .help {
        margin-top: 6px
    }

    .close {
        border: 1px solid var(--border);
        background: #f3f6ff;
        border-radius: 12px;
        padding: 10px 12px;
        font-weight: 950;
        cursor: pointer;
    }

    .modalBody {
        padding: 16px
    }

    .formRow {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .field {
        display: flex;
        flex-direction: column;
        gap: 6px;
        margin-bottom: 12px;
    }

    label {
        font-weight: 900;
        color: #274160
    }

    input,
    select {
        border: 1px solid var(--border);
        border-radius: 12px;
        padding: 12px 12px;
        font-weight: 600;
        outline: none;
        background: #ffffff;
    }

    input:focus,
    select:focus {
        border-color: rgba(29, 78, 216, .45);
        box-shadow: 0 0 0 4px rgba(29, 78, 216, .12);
    }

    .help {
        color: var(--muted);
        font-weight: 650;
        font-size: 13px;
        line-height: 1.45;
    }

    .modalFoot {
        padding: 14px 16px;
        border-top: 1px solid var(--border);
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 10px;
        flex-wrap: wrap;
    }

    .fineprint {
        color: var(--muted);
        font-weight: 650;
        font-size: 12px;
    }

    .btnModal {
        border: 1px solid rgba(29, 78, 216, .28);
        background: linear-gradient(180deg, rgba(29, 78, 216, .16), rgba(29, 78, 216, .08));
        color: #0f172a;
        padding: 12px 14px;
        border-radius: 12px;
        font-weight: 950;
        cursor: pointer;
    }

    /* Mobile */
    @media (max-width: 980px) {
        .nav {
            display: none
        }

        .heroTitle {
            font-size: 40px
        }

        .grid3 {
            grid-template-columns: 1fr
        }

        .twoCol {
            grid-template-columns: 1fr
        }

        .formRow {
            grid-template-columns: 1fr
        }

        .brand img {
            width: 230px
        }

        .hero {
            min-height: 560px
        }
    }

    @media (max-width: 420px) {
        .heroTitle {
            font-size: 34px
        }
    }