:root {
    --color-header-bg:  #1e2d45;
    --color-accent:     #2a9d8f;
    --color-bg:         #f4f5f7;
    --color-card:       #ffffff;
    --color-text:       #1a1a2e;
    --color-text-muted: #6b7280;
    --color-auth:       #f59e0b;
    --shadow-rest:      0 1px 3px rgba(0,0,0,.10), 0 1px 2px rgba(0,0,0,.06);
    --shadow-hover:     0 6px 16px rgba(0,0,0,.14), 0 2px 4px rgba(0,0,0,.08);
    --radius:           10px;
    --gap:              1.25rem;
    --max-width:        960px;
}

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

/* ── Base ── */
body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

/* ── Header ── */
.site-header {
    background: var(--color-header-bg);
    padding: 2.25rem 1.5rem 2rem;
    text-align: center;
}

.wordmark {
    display: block;
    font-size: 2.75rem;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: -0.04em;
    line-height: 1;
}

.tagline {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.5);
}

/* ── Main ── */
.site-main {
    flex: 1;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 2.5rem 1.5rem 2rem;
}

/* ── Featured grid (2-up) ── */
.featured-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--gap);
    margin-bottom: var(--gap);
}

/* ── Main grid (3-up) ── */
.main-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gap);
}

/* ── Cards ── */
.card {
    display: flex;
    flex-direction: column;
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 1.5rem 1.5rem 1.375rem;
    text-decoration: none;
    color: var(--color-text);
    box-shadow: var(--shadow-rest);
    border-top: 3px solid transparent;
    transition: box-shadow 0.15s ease, transform 0.15s ease, border-top-color 0.15s ease;
}

.card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
    border-top-color: var(--color-accent);
}

.card--featured {
    padding: 2rem 2rem 1.75rem;
}

.card-name {
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text);
}

.card--featured .card-name {
    font-size: 1.3rem;
}

.card-desc {
    margin-top: 0.4rem;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.45;
}

/* ── Auth badge ── */
.card-auth-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    margin-top: 0.9rem;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    color: var(--color-auth);
}

.lock-icon {
    width: 11px;
    height: 11px;
    fill: currentColor;
    flex-shrink: 0;
}

/* ── Footer ── */
.site-footer {
    text-align: center;
    padding: 1.5rem;
    font-size: 0.775rem;
    color: var(--color-text-muted);
}

/* ── Responsive: tablet ── */
@media (max-width: 1023px) {
    .main-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ── Responsive: mobile ── */
@media (max-width: 639px) {
    .site-header {
        padding: 1.75rem 1rem 1.5rem;
    }

    .wordmark {
        font-size: 2.25rem;
    }

    .site-main {
        padding: 1.5rem 1rem 1.5rem;
    }

    .featured-grid,
    .main-grid {
        grid-template-columns: 1fr;
    }

    .card--featured {
        padding: 1.5rem 1.5rem 1.375rem;
    }
}