:root {
    --navy: #1f3a5f;
    --blue: #2f5d8c;
    --steel: #4a5568;
    --light: #f4f6f8;
    --white: #ffffff;
    --text: #243447;
    --border: #dce3ea;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

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

.container {
    width: min(1120px, calc(100% - 40px));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--border);
}

.navigation {
    min-height: 82px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

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

.brand-symbol {
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: var(--navy);
    color: white;
    font-size: 23px;
    font-weight: bold;
    letter-spacing: -4px;
}

.brand-text {
    display: flex;
    flex-direction: column;
}

.brand-text strong {
    color: var(--navy);
    font-size: 18px;
}

.brand-text small {
    color: var(--steel);
    font-size: 11px;
}

nav {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 13px;
    color: var(--steel);
}

nav a:hover {
    color: var(--navy);
}

.hero {
    background:
        linear-gradient(135deg, rgba(31, 58, 95, 0.98), rgba(47, 93, 140, 0.93));
    color: white;
    padding: 130px 0 145px;
}

.hero-content {
    max-width: 850px;
}

.eyebrow {
    margin: 0 0 14px;
    color: #6f8eac;
    font-size: 12px;
    font-weight: bold;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.hero .eyebrow {
    color: #c9d9e8;
}

h1,
h2,
h3 {
    line-height: 1.15;
    margin-top: 0;
}

h1 {
    max-width: 850px;
    margin-bottom: 26px;
    font-size: clamp(42px, 7vw, 78px);
    letter-spacing: -2px;
}

h2 {
    font-size: clamp(30px, 4vw, 48px);
    color: var(--navy);
}

h3 {
    color: var(--navy);
    font-size: 22px;
}

.hero-description {
    max-width: 650px;
    color: #e1eaf2;
    font-size: 19px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 34px;
}

.button {
    display: inline-block;
    padding: 13px 22px;
    border-radius: 5px;
    font-size: 14px;
    font-weight: bold;
}

.button.primary {
    background: white;
    color: var(--navy);
}

.button.secondary {
    border: 1px solid rgba(255, 255, 255, 0.55);
    color: white;
}

.section {
    padding: 95px 0;
}

.light-section {
    background: var(--light);
}

.two-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 70px;
    align-items: start;
}

.two-columns p {
    font-size: 18px;
    color: var(--steel);
}

.video-placeholder {
    min-height: 330px;
    margin-top: 35px;
    display: grid;
    place-items: center;
    border: 1px solid var(--border);
    border-radius: 8px;
    background:
        linear-gradient(135deg, #e9eef3, #d5dee8);
    color: var(--steel);
    font-size: 18px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
    margin-top: 40px;
}

.feature-card {
    padding: 30px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 8px;
}

.feature-card p {
    color: var(--steel);
}

.engine-section {
    max-width: 800px;
}

.engine-section p:last-child {
    color: var(--steel);
    font-size: 19px;
}

.site-footer {
    padding: 30px 0;
    background: var(--navy);
    color: #dbe6f0;
    font-size: 13px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 20px;
}

@media (max-width: 800px) {
    .navigation {
        align-items: flex-start;
        flex-direction: column;
        padding: 18px 0;
    }

    nav {
        gap: 12px;
    }

    .hero {
        padding: 90px 0;
    }

    .two-columns,
    .feature-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .section {
        padding: 65px 0;
    }

    .footer-content {
        flex-direction: column;
    }
}