/* Shared styles for the Slipstream concepts directory pages.
   Concept HTML files bring their own styling — this only affects index pages. */

:root {
    --bg: #f8fafc;
    --card: #ffffff;
    --border: #e2e8f0;
    --text: #0f172a;
    --muted: #64748b;
    --accent: #4f46e5;
    --accent-soft: rgba(79, 70, 229, 0.08);
}

* { box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    margin: 0;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

.wrap {
    max-width: 1080px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem 5rem;
}

.brand {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.5rem;
}

h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0 0 0.5rem;
}

p.lead {
    color: var(--muted);
    margin: 0 0 2.5rem;
    font-size: 1rem;
    max-width: 60ch;
}

.section-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin: 0 0 0.75rem;
}

.card-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
    margin: 0 0 2rem;
    padding: 0;
    list-style: none;
}
@media (min-width: 640px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .card-grid { grid-template-columns: repeat(3, 1fr); } }

.card {
    display: block;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1.25rem 1.5rem;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
}
.card:hover {
    border-color: var(--accent);
    box-shadow: 0 6px 24px var(--accent-soft);
    transform: translateY(-1px);
}

.card .eyebrow {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.25rem;
}
.card .title {
    font-size: 1.05rem;
    font-weight: 700;
    margin: 0;
}
.card .meta {
    font-size: 0.875rem;
    color: var(--muted);
    margin-top: 0.5rem;
}

.back {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    color: var(--accent);
    text-decoration: none;
    font-weight: 700;
    font-size: 0.875rem;
    margin-bottom: 1.25rem;
}
.back:hover { text-decoration: underline; }

.foot {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    color: var(--muted);
    font-size: 0.875rem;
}
.foot a { color: var(--muted); }

.note {
    background: #fef9c3;
    border: 1px solid #fde68a;
    border-radius: 12px;
    padding: 0.75rem 1rem;
    color: #713f12;
    font-size: 0.875rem;
    margin: 0 0 1.5rem;
}