:root {
    --qfa-blue: dodgerblue;
    --qfa-blue-dark: #0878db;
    --qfa-navy: #123;
    --qfa-text: #1c2730;
    --qfa-muted: #5d6b76;
    --qfa-border: #dce4ea;
    --qfa-soft: #f6f9fb;
    --qfa-white: #ffffff;
    --qfa-success-bg: #edf8f2;
    --qfa-success-border: #b8dec8;
    --qfa-shadow: 0 12px 30px rgba(18, 38, 55, 0.08);
    --qfa-radius: 10px;
    --qfa-shell: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--qfa-white);
    color: var(--qfa-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.65;
}

a {
    color: var(--qfa-blue-dark);
}

a:hover {
    color: #005da9;
}

img {
    max-width: 100%;
}

.site-shell {
    width: min(calc(100% - 40px), var(--qfa-shell));
    margin: 0 auto;
}

.skip-link {
    position: fixed;
    top: -100px;
    left: 20px;
    z-index: 100;
    padding: 10px 16px;
    background: var(--qfa-navy);
    color: #fff;
    border-radius: 0 0 6px 6px;
    text-decoration: none;
}

.skip-link:focus {
    top: 0;
}

/* Header and navigation */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.97);
    border-bottom: 1px solid var(--qfa-border);
    backdrop-filter: blur(10px);
}

.header-inner {
    min-height: 78px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 25px;
}

.brand-link {
    display: inline-flex;
    flex-shrink: 0;
    text-decoration: none;
}

.site-navigation {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 24px;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 4px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav-list a {
    display: block;
    padding: 10px 12px;
    color: #44525c;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 6px;
}

.nav-list a:hover,
.nav-list a.is-active {
    color: var(--qfa-blue-dark);
    background: #edf7ff;
}

.menu-toggle {
    display: none;
    width: 46px;
    height: 42px;
    padding: 9px;
    background: #fff;
    border: 1px solid var(--qfa-border);
    border-radius: 6px;
    cursor: pointer;
}

.menu-toggle-line {
    display: block;
    width: 100%;
    height: 2px;
    margin: 4px 0;
    background: var(--qfa-navy);
    border-radius: 2px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    padding: 12px 20px;
    background: var(--qfa-blue);
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    line-height: 1.2;
    text-align: center;
    text-decoration: none;
    border: 1px solid var(--qfa-blue);
    border-radius: 6px;
    transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.button:hover {
    background: var(--qfa-blue-dark);
    border-color: var(--qfa-blue-dark);
    color: #fff;
    transform: translateY(-1px);
}

.button-secondary {
    background: #fff;
    color: var(--qfa-blue-dark);
    border-color: #a8d4f7;
}

.button-secondary:hover {
    background: #edf7ff;
    color: var(--qfa-blue-dark);
    border-color: var(--qfa-blue);
}

.button-small {
    min-height: 40px;
    padding: 9px 14px;
    font-size: 14px;
}

/* Page content */

.hero {
    padding: 40px 0 64px;
    background: linear-gradient(135deg, #f4f9fd 0%, #ffffff 64%);
    border-bottom: 1px solid var(--qfa-border);
}

.hero-content {
    max-width: 900px;
}

.eyebrow {
    display: inline-block;
    margin: 0 0 15px;
    color: var(--qfa-blue-dark);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero h1,
.page-heading h1 {
    max-width: 900px;
    margin: 0;
    color: #15222c;
    font-size: clamp(32px, 5vw, 52px);
    line-height: 1.12;
    letter-spacing: -0.035em;
}

.hero .lead,
.page-heading .lead {
    max-width: 800px;
    margin: 24px 0 0;
    color: #4d5c66;
    font-size: clamp(18px, 2.2vw, 21px);
    line-height: 1.65;
}

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

.prototype-notice {
    margin-top: 32px;
    padding: 14px 16px;
    background: var(--qfa-success-bg);
    border: 1px solid var(--qfa-success-border);
    border-radius: 7px;
    color: #28593e;
    font-size: 14px;
    font-weight: 600;
}

.section {
    padding: 70px 0;
}

.section-soft {
    background: var(--qfa-soft);
    border-top: 1px solid #e7edf1;
    border-bottom: 1px solid #e7edf1;
}

.section-heading {
    max-width: 770px;
    margin-bottom: 34px;
}

.section-heading h2 {
    margin: 0 0 12px;
    color: #15222c;
    font-size: clamp(26px, 3.5vw, 34px);
    line-height: 1.2;
    letter-spacing: -0.025em;
}

.section-heading p {
    margin: 0;
    color: var(--qfa-muted);
    font-size: 17px;
}

.page-heading {
    padding: 64px 0 44px;
    background: var(--qfa-soft);
    border-bottom: 1px solid var(--qfa-border);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.card {
    height: 100%;
    padding: 25px;
    background: #fff;
    border: 1px solid var(--qfa-border);
    border-radius: var(--qfa-radius);
}

.card h3 {
    margin: 0 0 12px;
    color: #182630;
    font-size: 19px;
    line-height: 1.3;
}

.card p {
    margin: 0;
    color: var(--qfa-muted);
    font-size: 15px;
}

.card-link {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.card-link:hover {
    color: inherit;
    border-color: #9cd1fa;
    box-shadow: var(--qfa-shadow);
    transform: translateY(-2px);
}

.card-link .card-action {
    margin-top: auto;
    padding-top: 20px;
    color: var(--qfa-blue-dark);
    font-size: 14px;
    font-weight: 700;
}

.two-column {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 0.85fr);
    gap: 55px;
    align-items: start;
}

.content-copy h2 {
    margin: 0 0 16px;
    font-size: 28px;
    line-height: 1.25;
}

.content-copy h3 {
    margin: 30px 0 10px;
    font-size: 20px;
}

.content-copy p {
    margin: 0 0 18px;
    color: #4e5d67;
}

.info-panel {
    padding: 28px;
    background: #fff;
    border: 1px solid var(--qfa-border);
    border-radius: var(--qfa-radius);
    box-shadow: var(--qfa-shadow);
}

.info-panel h2,
.info-panel h3 {
    margin-top: 0;
}

.check-list,
.number-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.check-list li,
.number-list li {
    position: relative;
    margin: 0 0 14px;
    padding-left: 30px;
    color: #4e5d67;
}

.check-list li::before {
    content: "\2713";
    position: absolute;
    top: 0;
    left: 0;
    color: var(--qfa-blue-dark);
    font-weight: 800;
}

.number-list {
    counter-reset: item;
}

.number-list li {
    counter-increment: item;
}

.number-list li::before {
    content: counter(item);
    position: absolute;
    top: 1px;
    left: 0;
    display: inline-flex;
    width: 20px;
    height: 20px;
    align-items: center;
    justify-content: center;
    background: #e7f4ff;
    color: var(--qfa-blue-dark);
    font-size: 12px;
    font-weight: 800;
    border-radius: 50%;
}

.callout {
    padding: 32px;
    background: var(--qfa-navy);
    color: #fff;
    border-radius: var(--qfa-radius);
}

.callout h2 {
    margin: 0 0 10px;
    font-size: 28px;
}

.callout p {
    margin: 0;
    color: #dbe9f3;
}

.callout .button {
    margin-top: 22px;
    background: #fff;
    color: var(--qfa-blue-dark);
    border-color: #fff;
}

.callout .button:hover {
    background: #e9f6ff;
    border-color: #e9f6ff;
}




/* Footer */
.site-footer {
    padding: 10px 0;
    background: #f8fafb;
    border-top: 1px solid var(--qfa-border);
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 25px;
}


@media (max-width: 900px) {
    .hamburger-adjustment {
        --w: 1000;
    }

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

    .menu-toggle {
        display: block;
    }

    .site-navigation {
        position: absolute;
        top: calc(100% + 1px);
        right: 0;
        left: 0;
        display: none;
        align-items: stretch;
        gap: 0;
        padding: 14px 20px 20px;
        background: #fff;
        border-bottom: 1px solid var(--qfa-border);
        box-shadow: 0 14px 24px rgba(18, 38, 55, 0.1);
    }

    .site-navigation.is-open {
        display: block;
    }

    .nav-list {
        display: block;
    }

    .nav-list li {
        border-bottom: 1px solid #edf1f4;
    }

    .nav-list a {
        padding: 12px 6px;
        border-radius: 0;
    }

    .nav-demo-button {
        width: 100%;
        margin-top: 16px;
    }

    .card-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .two-column {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}
















/*
@media (max-width: 600px) {
    .hamburger-adjustment {
        --w: 500;
    }

    .site-shell {
        width: min(calc(100% - 28px), var(--qfa-shell));
    }

    .hero {
        padding: 20px 0 48px;
    }

    .section {
        padding: 50px 0;
    }

    .page-heading {
        padding: 48px 0 35px;
    }

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

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

    .footer-brand {
        align-items: flex-start;
        flex-direction: column;
    }
}
*/