/* ==========================================================================
   V — Projects
   The proof chapter: filters, a featured panel, and honest project cards.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Filters — quiet chips, the active one carries the light.
   -------------------------------------------------------------------------- */
.filter-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 2.2rem;
}

.filter-chip {
    padding: 0.5rem 1.1rem;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border-subtle);
    background: transparent;
    font-family: var(--font-mono);
    font-size: var(--size-micro);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-secondary);
    cursor: pointer;
    transition:
        color var(--dur-quick) var(--ease-physical),
        border-color var(--dur-quick) var(--ease-physical),
        background-color var(--dur-quick) var(--ease-physical),
        transform var(--dur-quick) var(--ease-spring);
}

.filter-chip:hover {
    color: var(--text-primary);
    border-color: var(--border-active);
    transform: translateY(-1px);
}

.filter-chip:active { transform: scale(0.96); }

.filter-chip.is-active {
    color: var(--text-primary);
    border-color: color-mix(in srgb, var(--accent) 45%, transparent);
    background: var(--accent-soft);
    box-shadow: 0 0 18px -6px var(--accent-glow);
}

/* --------------------------------------------------------------------------
   Grid — the featured project takes the full first row.
   -------------------------------------------------------------------------- */
.project-section {
    padding-bottom: 2rem;
}

.project-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.6rem;
}

.project-card {
    display: flex;
    flex-direction: column;
    border-radius: var(--radius-lg);
    overflow: hidden;
    text-align: left;
    cursor: pointer;
}

.project-card .work-scene {
    min-height: 220px;
    flex-shrink: 0;
}

.project-card--featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
}

.project-card--featured .work-scene {
    min-height: 300px;
}

.project-card--vault {
    cursor: default;
}

.project-info {
    padding: clamp(1.4rem, 3vw, 2.2rem);
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    justify-content: center;
}

.project-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

.project-info h2 {
    font-size: clamp(1.4rem, 2.4vw, 1.9rem);
}

.project-info p {
    color: var(--text-secondary);
    font-size: var(--size-small);
    max-width: 46ch;
}

.project-info .work-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.4rem;
}

/* Filtering: cards leave and arrive inside a view transition when
   available; the class itself only controls membership. */
.project-card.is-filtered {
    display: none;
}

.project-empty {
    margin-top: 2.5rem;
    text-align: center;
    color: var(--text-muted);
    font-size: var(--size-small);
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
    .project-grid { grid-template-columns: 1fr; }

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

    .project-card--featured .work-scene { min-height: 220px; }
}