* {
    box-sizing: border-box;
}

:root {
    --green: #245c4d;
    --green-dark: #173c33;
    --cream: #f4efe7;
    --border: #e4dccf;
    --text: #252525;
    --muted: #6d6d6d;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: Arial, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(36, 92, 77, .16), transparent 32%),
        var(--cream);
    color: var(--text);
    padding: 28px;
}

.registry {
    width: min(1120px, 100%);
    margin: 0 auto;
}

.hero {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 28px;
    padding: 42px;
    box-shadow: 0 18px 45px rgba(0, 0, 0, .10);
    margin-bottom: 24px;
}

.eyebrow {
    display: inline-block;
    color: var(--green);
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .12em;
    margin-bottom: 12px;
}

h1 {
    margin: 0;
    font-size: clamp(42px, 7vw, 76px);
    line-height: .95;
    color: var(--green);
}

.hero p {
    max-width: 720px;
    font-size: 19px;
    line-height: 1.55;
    color: var(--muted);
    margin: 22px 0 0;
}

.protocol-card {
    display: grid;
    grid-template-columns: 1fr 260px;
    gap: 24px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 28px;
    box-shadow: 0 14px 35px rgba(0, 0, 0, .08);
}

.spec {
    display: inline-block;
    background: #eef7f3;
    color: var(--green);
    padding: 8px 12px;
    border-radius: 999px;
    font-weight: 800;
    font-size: 13px;
    margin-bottom: 14px;
}

.protocol-info h2 {
    margin: 0;
    font-size: 38px;
    color: var(--green);
}

.protocol-info h3 {
    margin: 6px 0 0;
    font-size: 21px;
}

.protocol-info p {
    color: var(--muted);
    font-size: 16px;
    line-height: 1.55;
    max-width: 660px;
}

.badges {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 18px;
}

.badges span {
    background: #f3f3f3;
    border: 1px solid #e1e1e1;
    padding: 7px 10px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
}

.protocol-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    justify-content: center;
}

.btn {
    display: block;
    text-decoration: none;
    text-align: center;
    background: #ececec;
    color: var(--text);
    padding: 13px 16px;
    border-radius: 14px;
    font-weight: 800;
    transition: .2s;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn.primary {
    background: var(--green);
    color: #fff;
}

.btn.ghost {
    background: transparent;
    border: 1px solid var(--green);
    color: var(--green);
}

.empty-state {
    margin-top: 24px;
    border: 1px dashed var(--border);
    border-radius: 22px;
    padding: 28px;
    text-align: center;
    color: var(--muted);
}

.empty-state h2 {
    color: var(--green);
    margin: 0 0 8px;
}

@media (max-width: 780px) {
    body {
        padding: 14px;
    }

    .hero,
    .protocol-card {
        padding: 24px;
    }

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

    .protocol-actions {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .btn {
        flex: 1 1 150px;
    }
}