/* ============================================================
   SANDBOX HUB — Navigation launchpad styles
   Standalone: zero dependency on Bootstrap or Skote.
   Do not include this on any sandbox sub-pages.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;1,400;1,500&family=Inter:wght@300;400;500&display=swap');

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg:           #EEECEA;   /* warm off-white */
    --card-bg:      #FAFAF8;   /* near white */
    --card-dark-bg: #1A1916;   /* near black for accent card */
    --text:         #1A1916;
    --text-muted:   #908F8A;
    --border:       #DDD9D3;
    --border-hover: #B8B4AE;
    --radius:       16px;
    --ease:         220ms cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

html {
    font-family: 'Inter', system-ui, sans-serif;
    background-color: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── NAV ─────────────────────────────────────────────────── */

.hub-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 32px 52px;
    position: sticky;
    top: 0;
    background: var(--bg);
    z-index: 10;
}

.hub-nav__brand {
    font-family: 'Inter', sans-serif;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text);
    text-decoration: none;
}

.hub-nav__links {
    display: flex;
    align-items: center;
    gap: 36px;
    list-style: none;
}

.hub-nav__links a {
    font-size: 12px;
    font-weight: 400;
    color: var(--text-muted);
    text-decoration: none;
    letter-spacing: 0.03em;
    transition: color var(--ease);
}

.hub-nav__links a:hover {
    color: var(--text);
}

.hub-nav__links a[aria-current="page"] {
    color: var(--text);
}

.hub-nav__year {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 300;
    letter-spacing: 0.04em;
}

/* ── HERO ─────────────────────────────────────────────────── */

.hub-hero {
    padding: 72px 52px 64px;
}

.hub-hero__label {
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 24px;
}

.hub-hero__title {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: clamp(40px, 5.5vw, 72px);
    font-weight: 400;
    line-height: 1.1;
    color: var(--text);
    letter-spacing: -0.02em;
    max-width: 680px;
}

.hub-hero__title em {
    font-style: italic;
    color: var(--text-muted);
}

.hub-hero__name {
    color: inherit;
    text-decoration: none;
    border-bottom: 1px solid var(--border-hover);
    transition: border-color var(--ease), color var(--ease);
}

.hub-hero__name:hover {
    color: var(--text-muted);
    border-bottom-color: var(--text);
}

/* ── DIVIDER ──────────────────────────────────────────────── */

.hub-divider {
    margin: 0 52px 52px;
    border: none;
    border-top: 1px solid var(--border);
}

/* ── GRID ─────────────────────────────────────────────────── */

.hub-grid {
    padding: 0 52px 80px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 18px;
    flex: 1;
}

/* ── CARD ─────────────────────────────────────────────────── */

.hub-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    padding: 32px 32px 28px;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    min-height: 280px;
    position: relative;
    overflow: hidden;
    transition:
        border-color var(--ease),
        box-shadow var(--ease),
        transform var(--ease);
}

.hub-card:hover {
    border-color: var(--border-hover);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
    transform: translateY(-3px);
}

/* Tag */
.hub-card__tag {
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 20px;
}

/* Title */
.hub-card__title {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 26px;
    font-weight: 400;
    line-height: 1.3;
    color: var(--text);
    letter-spacing: -0.01em;
    margin-bottom: 12px;
}

/* Description */
.hub-card__desc {
    font-size: 13.5px;
    font-weight: 400;
    line-height: 1.65;
    color: var(--text-muted);
    flex: 1;
}

/* Footer row */
.hub-card__footer {
    margin-top: 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.hub-card__meta {
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 0.04em;
}

/* Arrow button */
.hub-card__arrow {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition:
        background var(--ease),
        border-color var(--ease),
        color var(--ease);
}

.hub-card:hover .hub-card__arrow {
    background: var(--text);
    border-color: var(--text);
    color: var(--card-bg);
}

/* ── DARK CARD VARIANT ────────────────────────────────────── */

.hub-card--dark {
    background: var(--card-dark-bg);
    border-color: var(--card-dark-bg);
}

.hub-card--dark .hub-card__tag,
.hub-card--dark .hub-card__desc,
.hub-card--dark .hub-card__meta {
    color: #5C5A56;
}

.hub-card--dark .hub-card__title {
    color: #EEECEA;
}

.hub-card--dark .hub-card__arrow {
    border-color: #2E2C28;
    color: #5C5A56;
}

.hub-card--dark:hover {
    border-color: #2E2C28;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.18);
}

.hub-card--dark:hover .hub-card__arrow {
    background: #EEECEA;
    border-color: #EEECEA;
    color: var(--card-dark-bg);
}

/* ── FOOTER ───────────────────────────────────────────────── */

.hub-footer {
    padding: 24px 52px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.hub-footer__text {
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 0.04em;
}

.hub-footer__link {
    color: var(--text);
    text-decoration: none;
    border-bottom: 1px solid var(--border-hover);
    transition: border-color var(--ease);
}

.hub-footer__link:hover {
    border-bottom-color: var(--text);
}

/* ── RESPONSIVE ───────────────────────────────────────────── */

@media (max-width: 768px) {
    .hub-nav,
    .hub-hero,
    .hub-grid,
    .hub-footer {
        padding-left: 24px;
        padding-right: 24px;
    }

    .hub-divider {
        margin-left: 24px;
        margin-right: 24px;
    }

    .hub-nav__links {
        display: none;
    }

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

    .hub-hero {
        padding-top: 48px;
        padding-bottom: 48px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .hub-card {
        transition: none;
    }
    .hub-card__arrow {
        transition: none;
    }
}