:root {
    --bg: #f6f7fb;
    --card: #ffffff;
    --accent: #6c5ce7;
    --muted: #6b7280;
    --max-width: 1000px;
    --radius: 10px;
}

* {
    box-sizing: border-box
}

html,
body {
    height: 100%
}

body {
    margin: 0;
    font-family: Inter, system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial;
    background: var(--bg);
    color: #111827;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem
}

.site-header {
    background: linear-gradient(90deg, #eef2ff, #f8f9ff)
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0
}

.logo {
    font-weight: 700;
    color: var(--accent)
}

.nav-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 1rem
}

.nav-links a {
    color: #374151;
    text-decoration: none;
    font-weight: 600
}

.hero {
    padding: 2rem 0;
    text-align: left
}

.hero h1 {
    margin: 0;
    font-size: 2rem;
    color: #111827
}

.tagline {
    margin-top: .25rem;
    color: var(--muted)
}

main {
    padding: 2rem 0
}

section {
    background: var(--card);
    border-radius: var(--radius);
    padding: 1.25rem;
    margin-bottom: 1rem;
    box-shadow: 0 2px 6px rgba(15, 23, 42, 0.04)
}

.protocol-list {
    padding-left: 1.2rem
}

mark {
    background: linear-gradient(90deg, #fff59d, #ffd1dc);
    padding: .05rem .2rem;
    border-radius: 4px
}

.site-footer {
    padding: 1rem 0;
    color: var(--muted);
    text-align: center
}

code {
    background: #f3f4f6;
    padding: .15rem .35rem;
    border-radius: 4px;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, 'Roboto Mono', 'Courier New', monospace
}

@media (max-width:700px) {
    .nav {
        flex-direction: column;
        gap: .5rem
    }

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

    .hero h1 {
        font-size: 1.5rem;
        text-align: center
    }

    .container {
        padding: 0 .75rem
    }
}

@media print {
    body { background: white; }
    .site-header { background: #f9fafb; }
    section { box-shadow: none; border: 1px solid #e5e7eb; page-break-inside: avoid; }
    a { color: #6c5ce7; text-decoration: underline; }
    code { background: #f3f4f6; border: 1px solid #e5e7eb; }
}

@supports (backdrop-filter: blur(10px)) {
    .site-header { backdrop-filter: blur(10px); }
}

/* Accessibility */
a:focus, button:focus { outline: 2px solid var(--accent); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { * { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; } }