/*
 * Card / panel (WP9; UI-Design-Principles Sec. 3.2/6). The signature element: a
 * stateful panel carries a 3px "ember edge" on its LEFT in the status colour.
 * Neutral content cards (blog, downloads) omit the edge.
 *
 * Class schema: gtx-card, gtx-card--<status> (ok|warn|danger|idle|info),
 * gtx-card__header, gtx-card__title, gtx-card__body, gtx-card__footer,
 * gtx-card__meta.
 */

.gtx-card {
    position: relative;
    background: var(--gtx-surface);
    border: 1px solid var(--gtx-line);
    border-radius: var(--gtx-r-m);
    box-shadow: var(--gtx-shadow-card);
    padding: var(--gtx-s5);
    overflow: hidden;
}

/* Ember edge — the stateful signature (Sec. 3.2). Neutral cards leave it off. */
.gtx-card--ok,
.gtx-card--warn,
.gtx-card--danger,
.gtx-card--idle,
.gtx-card--info {
    border-left: 3px solid var(--gtx-idle);
}

.gtx-card--ok { border-left-color: var(--gtx-ok); }
.gtx-card--warn { border-left-color: var(--gtx-warn); }
.gtx-card--danger { border-left-color: var(--gtx-danger); }
.gtx-card--idle { border-left-color: var(--gtx-idle); }
.gtx-card--info { border-left-color: var(--gtx-info); }

.gtx-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--gtx-s3);
    margin-bottom: var(--gtx-s3);
}

.gtx-card__title {
    font-family: var(--gtx-font-display);
    font-size: var(--gtx-fs-h3);
    font-weight: 600;
}

.gtx-card__meta {
    color: var(--gtx-text-dim);
    font-size: var(--gtx-fs-meta);
}

.gtx-card__body {
    color: var(--gtx-text);
}

.gtx-card__body > * + * {
    margin-top: var(--gtx-s3);
}

.gtx-card__footer {
    margin-top: var(--gtx-s4);
    padding-top: var(--gtx-s4);
    border-top: 1px solid var(--gtx-line);
    display: flex;
    gap: var(--gtx-s2);
    flex-wrap: wrap;
}

/* One-time status-change pulse of the edge; disabled by reduced-motion (Sec. 8). */
@media (prefers-reduced-motion: no-preference) {
    .gtx-card.is-changed {
        animation: gtx-edge-pulse var(--gtx-t-med) var(--gtx-ease) 1;
    }
}

@keyframes gtx-edge-pulse {
    from { border-left-width: 6px; }
    to { border-left-width: 3px; }
}