:root {
    --bg: #f3f6fa;
    --card: #ffffff;
    --line: #d8e1eb;
    --text: #162133;
    --muted: #617086;
    --primary: #1f5fae;
    --primary-soft: #eaf2fb;
    --shadow: 0 10px 30px rgba(20, 33, 51, 0.08);
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background: linear-gradient(180deg, #f7f9fc 0%, #eef3f8 100%);
    color: var(--text);
    line-height: 1.6;
}

.landing-shell {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

.hero-card {
    width: 100%;
    max-width: 980px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 22px;
    box-shadow: var(--shadow);
    padding: 48px;
}

.prototype-badge {
    display: inline-block;
    margin-bottom: 18px;
    padding: 7px 12px;
    border-radius: 999px;
    background: var(--primary-soft);
    color: var(--primary);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.eyebrow {
    font-size: 13px;
    font-weight: 700;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 10px;
}

h1 {
    margin: 0 0 14px;
    font-size: 56px;
    line-height: 1.05;
    font-weight: 700;
}

.lead {
    font-size: 22px;
    line-height: 1.45;
    max-width: 760px;
    margin: 0 0 18px;
    color: var(--text);
}

.intro {
    max-width: 820px;
    margin: 0 0 30px;
    color: var(--muted);
    font-size: 17px;
}

.stats {
    display: flex;
    gap: 18px;
    flex-wrap: wrap;
    margin-bottom: 28px;
}

.stat-box {
    min-width: 220px;
    background: #f8fbfe;
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 18px 20px;
}

.stat-value {
    display: block;
    font-size: 34px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 6px;
}

.stat-label {
    color: var(--muted);
    font-size: 14px;
}

.prototype-panel {
    border: 1px solid var(--line);
    border-left: 4px solid var(--primary);
    border-radius: 16px;
    padding: 20px 22px;
    background: #fcfdff;
    margin-bottom: 26px;
}

.prototype-panel h2 {
    margin: 0 0 8px;
    font-size: 20px;
}

.prototype-panel p {
    margin: 0;
    color: var(--muted);
}

.focus-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 28px;
}

.focus-card {
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 20px;
    background: #fbfcfe;
}

.focus-card h3 {
    margin: 0 0 10px;
    font-size: 18px;
}

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

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

.meta {
    color: var(--muted);
    font-size: 14px;
}

.back-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 700;
}

.back-link:hover {
    text-decoration: underline;
}

@media (max-width: 900px) {
    .hero-card {
        padding: 34px 24px;
    }

    h1 {
        font-size: 42px;
    }

    .lead {
        font-size: 19px;
    }

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

@media (max-width: 600px) {
    .landing-shell {
        padding: 20px 14px;
    }

    .hero-card {
        padding: 26px 18px;
        border-radius: 18px;
    }

    h1 {
        font-size: 34px;
    }

    .lead {
        font-size: 18px;
    }

    .intro {
        font-size: 16px;
    }

    .stat-box {
        width: 100%;
    }
}