/* ========================================================================
   Pattern Evolution page  ·  evolution.css
   Interactive matrix of 23 GoF + 25 distributed patterns → Agent era.
   Inherits brand palette from style.css (warm brown/orange family).
   ======================================================================== */

.evo-title {
    font-family: var(--font-serif);
    font-size: 1.85rem;
    line-height: 1.25;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

.evo-meta {
    background: var(--color-quote-bg);
    border-left: 3px solid var(--color-link);
    padding: 0.85rem 1.1rem;
    margin: 1.5rem 0 2rem;
    font-size: 0.92rem;
    line-height: 1.55;
    color: var(--color-text-muted);
}

/* --- Section wrappers --- */
.evo-section {
    margin: 3rem 0;
}

.evo-section-header h2 {
    font-family: var(--font-serif);
    font-size: 1.45rem;
    margin-bottom: 0.55rem;
    color: var(--color-text);
}

.evo-section-sub {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: 1.4rem;
    max-width: var(--measure);
}

/* --- Matrix layout --- */
.evo-matrix {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.evo-group {
    border: 1px solid var(--color-rule);
    border-radius: 6px;
    overflow: hidden;
    background: #ffffff;
}

.evo-group-header {
    background: var(--color-badge-bg);
    padding: 0.7rem 1rem;
    border-bottom: 1px solid var(--color-rule);
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.evo-group-name {
    font-weight: 600;
    color: var(--color-link);
    font-size: 0.95rem;
    letter-spacing: 0.01em;
}

.evo-group-count {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    font-variant-numeric: tabular-nums;
}

.evo-group-summary {
    flex-basis: 100%;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-style: italic;
    margin-top: 0.15rem;
}

/* --- Cells (one cell per pattern) --- */
.evo-cells {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1px;
    background: var(--color-rule);
}

.evo-cell {
    background: #ffffff;
    padding: 0.85rem 0.9rem;
    cursor: pointer;
    border: none;
    font-family: var(--font-sans);
    text-align: left;
    font-size: 0.9rem;
    color: var(--color-text);
    transition: background 0.12s ease, color 0.12s ease;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    line-height: 1.35;
    width: 100%;
    min-height: 3.4rem;
}

.evo-cell:hover {
    background: #fefaf3;
    color: var(--color-link);
}

.evo-cell:focus {
    outline: 2px solid var(--color-link);
    outline-offset: -2px;
}

.evo-cell.is-pending {
    color: var(--color-text-muted);
}

.evo-cell.is-pending:hover {
    background: #f8f5ef;
    color: var(--color-text);
}

/* --- Status dots --- */
.evo-status-dot {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 0.45rem;
}

.evo-status-dot.detailed {
    background: var(--color-link);
}

.evo-status-dot.pending {
    background: transparent;
    border: 1px solid var(--color-text-faint);
}

.evo-cell-name {
    flex: 1;
    min-width: 0;
}

.evo-cell-name strong {
    display: block;
    font-weight: 600;
    margin-bottom: 0.15rem;
}

.evo-cell-name small {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-faint);
    font-style: italic;
}

/* --- GoF section: render as 3 horizontal categories --- */
#gof-matrix .evo-cells {
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
}

/* --- Distributed section: render as 5 vertical groups --- */
#dist-matrix .evo-cells {
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
}

/* --- Closing block --- */
.evo-closing {
    margin: 3.5rem 0 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-rule);
}

.evo-closing h2 {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    margin-bottom: 1rem;
}

.evo-collapse {
    background: var(--color-quote-bg);
    border-left: 4px solid var(--color-link);
    padding: 1.2rem 1.5rem;
    font-family: var(--font-serif);
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--color-text);
    margin: 1rem 0 1.5rem;
}

.evo-collapse em {
    color: var(--color-link);
    font-style: italic;
}

/* --- Detail panel (slides in from right) --- */
.evo-detail {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(560px, 92vw);
    background: #ffffff;
    box-shadow: -4px 0 18px rgba(90, 58, 26, 0.12);
    overflow-y: auto;
    padding: 2rem 1.75rem 3rem;
    z-index: 100;
    transform: translateX(100%);
    transition: transform 0.22s ease-out;
}

.evo-detail:not([hidden]) {
    transform: translateX(0);
}

.evo-detail-close {
    position: absolute;
    top: 0.85rem;
    right: 1rem;
    background: transparent;
    border: none;
    font-size: 1.6rem;
    color: var(--color-text-muted);
    cursor: pointer;
    line-height: 1;
    padding: 0.25rem 0.5rem;
}

.evo-detail-close:hover {
    color: var(--color-link);
}

.evo-detail-body h3 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    margin-bottom: 0.4rem;
    color: var(--color-text);
}

.evo-detail-era {
    font-size: 0.78rem;
    color: var(--color-text-faint);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 1.3rem;
    font-weight: 600;
}

.evo-detail-section {
    margin: 1.2rem 0;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-rule);
}

.evo-detail-section:last-of-type {
    border-bottom: none;
}

.evo-detail-section h4 {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--color-link);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.55rem;
}

.evo-detail-section p {
    font-size: 0.96rem;
    line-height: 1.65;
    color: var(--color-text);
    margin: 0;
}

.evo-detail-arrow {
    text-align: center;
    color: var(--color-text-faint);
    font-size: 1.2rem;
    margin: 0.6rem 0;
}

.evo-detail-agent-term {
    background: var(--color-badge-bg);
    color: var(--color-link);
    padding: 0.2rem 0.55rem;
    border-radius: 3px;
    font-size: 0.85rem;
    font-weight: 600;
    display: inline-block;
    margin-bottom: 0.4rem;
}

.evo-detail-collapse {
    background: var(--color-quote-bg);
    border-left: 3px solid var(--color-link);
    padding: 0.9rem 1.1rem;
    margin-top: 1.5rem;
    font-style: italic;
    font-size: 0.95rem;
    line-height: 1.55;
    color: var(--color-text);
}

.evo-detail-pending {
    background: #fff8ee;
    border: 1px dashed var(--color-link);
    border-radius: 4px;
    padding: 1.2rem;
    margin: 1.5rem 0;
}

.evo-detail-pending h4 {
    color: var(--color-link);
    font-size: 0.9rem;
    margin-bottom: 0.6rem;
    text-transform: none;
    letter-spacing: 0;
}

.evo-detail-pending p {
    font-size: 0.92rem;
    line-height: 1.55;
    color: var(--color-text-muted);
    margin: 0;
}

/* --- Backdrop (dims background when detail open) --- */
.evo-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(26, 26, 46, 0.25);
    z-index: 99;
    opacity: 0;
    transition: opacity 0.18s ease;
}

.evo-backdrop.is-visible {
    opacity: 1;
}

/* --- Mobile adjustments --- */
@media (max-width: 640px) {
    .evo-cells {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    .evo-cell {
        font-size: 0.84rem;
        padding: 0.7rem 0.7rem;
        min-height: 3rem;
    }

    .evo-detail {
        width: 100vw;
        padding: 2rem 1rem 3rem;
    }

    .evo-collapse {
        font-size: 0.95rem;
        padding: 1rem 1.1rem;
    }
}