:root {
    --navy: #0d2c54;
    --teal: #00adb5;
    --text: #1f2937;
    --muted: #6b7280;
    --border: #e5edf2;
    --background: #f7fbfd;
    --soft-teal: #eafafa;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: Inter, Segoe UI, Arial, sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, rgba(0, 173, 181, 0.13), transparent 34%),
        linear-gradient(135deg, #ffffff 0%, var(--background) 100%);
}

.site-header {
    max-width: 1160px;
    margin: 0 auto;
    padding: 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    width: 280px;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 26px;
}

.site-nav a {
    color: var(--navy);
    text-decoration: none;
    font-weight: 900;
    font-size: 0.95rem;
}

.nav-button {
    padding: 11px 18px;
    border-radius: 999px;
    background: var(--soft-teal);
    color: var(--teal) !important;
}

.hero {
    max-width: 980px;
    margin: 56px auto 54px auto;
    padding: 0 28px;
    text-align: center;
}

.eyebrow {
    display: inline-block;
    margin-bottom: 18px;
    padding: 8px 14px;
    border-radius: 999px;
    background: var(--soft-teal);
    color: var(--teal);
    font-size: 0.78rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.hero h1 {
    margin: 0;
    color: var(--navy);
    font-size: clamp(3rem, 7vw, 5.8rem);
    line-height: 0.95;
    letter-spacing: -0.06em;
}

.hero-copy {
    max-width: 760px;
    margin: 28px auto 16px auto;
    color: var(--muted);
    font-size: 1.28rem;
    line-height: 1.7;
    font-weight: 600;
}

.hero-differentiator {
    max-width: 720px;
    margin: 0 auto 34px auto;
    color: var(--navy);
    font-size: 1.08rem;
    line-height: 1.6;
    font-weight: 900;
}

.primary-button,
.secondary-button {
    display: inline-block;
    border-radius: 999px;
    padding: 15px 24px;
    text-decoration: none;
    font-weight: 900;
}

.primary-button {
    background: var(--teal);
    color: #ffffff;
    box-shadow: 0 18px 35px rgba(0, 173, 181, 0.28);
}

.secondary-button {
    border: 2px solid rgba(255, 255, 255, 0.28);
    color: #ffffff;
    background: rgba(255, 255, 255, 0.08);
}

.flow {
    max-width: 1050px;
    margin: 0 auto 70px auto;
    padding: 22px;
    display: flex;
    gap: 14px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
}

.flow div {
    padding: 16px 20px;
    border: 1px solid var(--border);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.88);
    color: var(--navy);
    font-weight: 900;
    box-shadow: 0 12px 30px rgba(13, 44, 84, 0.08);
}

.flow span {
    color: var(--teal);
    font-size: 1.6rem;
    font-weight: 900;
}

.features,
.roadmap-grid {
    max-width: 1160px;
    margin: 0 auto;
    padding: 0 28px 80px 28px;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
}

.feature-card,
.roadmap-card,
.comparison-card {
    border: 1px solid var(--border);
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 20px 45px rgba(13, 44, 84, 0.08);
}

.feature-card {
    min-height: 250px;
    padding: 28px;
}

.feature-icon {
    width: 46px;
    height: 46px;
    margin-bottom: 22px;
    display: grid;
    place-items: center;
    border-radius: 15px;
    background: var(--soft-teal);
    font-size: 1.45rem;
}

.feature-card h2,
.comparison-card h3,
.roadmap-card h3 {
    margin: 0 0 14px 0;
    color: var(--navy);
}

.feature-card p,
.comparison-card li,
.roadmap-card p,
.section-heading p,
.concept-panel p {
    color: var(--muted);
    line-height: 1.65;
    font-weight: 600;
}

.why-section,
.roadmap-section {
    max-width: 1160px;
    margin: 0 auto;
    padding: 10px 28px 80px 28px;
}

.section-heading {
    max-width: 760px;
    margin-bottom: 30px;
}

.section-heading h2,
.concept-panel h2 {
    margin: 0;
    color: var(--navy);
    font-size: clamp(2rem, 4vw, 3.4rem);
    line-height: 1.05;
    letter-spacing: -0.04em;
}

.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 22px;
}

.comparison-card {
    padding: 32px;
}

.comparison-card ul {
    margin: 0;
    padding-left: 20px;
}

.comparison-card li {
    margin: 12px 0;
}

.comparison-card-primary {
    background: var(--navy);
}

.comparison-card-primary h3,
.comparison-card-primary li {
    color: #ffffff;
}

.concept-panel {
    max-width: 1160px;
    margin: 0 auto 90px auto;
    padding: 46px;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 36px;
    align-items: center;
    border-radius: 36px;
    background: #ffffff;
    border: 1px solid var(--border);
    box-shadow: 0 30px 70px rgba(13, 44, 84, 0.12);
}

.concept-stack {
    display: grid;
    gap: 10px;
    justify-items: center;
}

.concept-stack div {
    width: 100%;
    padding: 15px 18px;
    border-radius: 18px;
    background: var(--soft-teal);
    color: var(--navy);
    font-weight: 900;
    text-align: center;
}

.concept-stack span {
    color: var(--teal);
    font-weight: 900;
    font-size: 1.2rem;
}

.roadmap-card {
    padding: 26px;
    min-height: 210px;
}

.roadmap-card span {
    display: inline-grid;
    place-items: center;
    width: 34px;
    height: 34px;
    margin-bottom: 18px;
    border-radius: 999px;
    background: #eef3f7;
    color: var(--navy);
    font-weight: 900;
}

.roadmap-card.complete span,
.roadmap-card.in-progress span {
    background: var(--soft-teal);
    color: var(--teal);
}

.coming-soon {
    max-width: 860px;
    margin: 0 auto 80px auto;
    padding: 42px;
    text-align: center;
    border-radius: 32px;
    background: var(--navy);
    color: #ffffff;
    box-shadow: 0 30px 70px rgba(13, 44, 84, 0.2);
}

.coming-soon h2 {
    margin: 0;
    font-size: 2.2rem;
}

.coming-soon p {
    margin: 18px auto 26px auto;
    max-width: 680px;
    color: rgba(255, 255, 255, 0.78);
    line-height: 1.7;
    font-weight: 600;
}

footer {
    padding: 34px 28px;
    text-align: center;
    color: var(--muted);
    font-size: 0.9rem;
    font-weight: 700;
}

@media (max-width: 980px) {
    .features,
    .roadmap-grid {
        grid-template-columns: 1fr 1fr;
    }

    .concept-panel {
        grid-template-columns: 1fr;
        margin-left: 24px;
        margin-right: 24px;
    }
}

@media (max-width: 720px) {
    .site-header {
        flex-direction: column;
        gap: 18px;
    }

    .site-nav {
        flex-wrap: wrap;
        justify-content: center;
    }

    .logo {
        width: 240px;
    }

    .features,
    .roadmap-grid,
    .comparison-grid {
        grid-template-columns: 1fr;
    }

    .flow span {
        display: none;
    }

    .coming-soon {
        margin-left: 20px;
        margin-right: 20px;
    }
}