/**
 * css/explainer.css
 * CSL Activity Explainer UI Styles
 *
 * Component: .csl-activity-explainer
 * Starts collapsed — panel visible only after user click.
 * Theme-aware (dark + light mode).
 *
 * Load order: after all other CSS.
 */

/* ── Wrapper ─────────────────────────────────────────────────── */
.csl-activity-explainer {
    margin-top: 1.5rem;
    border-top: 1px solid var(--border, rgba(79,70,229,0.18));
    padding-top: 1rem;
}

/* ── Toggle Button ───────────────────────────────────────────── */
.csl-explainer-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary-muted, rgba(79,70,229,0.1));
    border: 1px solid rgba(79,70,229,0.3);
    border-radius: 10px;
    color: #a5b4fc;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    padding: 10px 18px;
    cursor: pointer;
    transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease,
                transform 0.15s ease, box-shadow 0.18s ease;
    letter-spacing: 0.01em;
    width: 100%;
    justify-content: center;
}
.csl-explainer-btn:hover {
    background: rgba(79,70,229,0.18);
    border-color: rgba(129,140,248,0.5);
    color: #c7d2fe;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(79,70,229,0.2);
}
.csl-explainer-btn:active { transform: translateY(0); }
.csl-explainer-btn[aria-expanded="true"] {
    background: rgba(79,70,229,0.18);
    border-color: rgba(129,140,248,0.45);
    color: #e0e7ff;
}

.csl-explainer-btn-icon {
    font-size: 0.75rem;
    opacity: 0.85;
    flex-shrink: 0;
    transition: transform 0.2s ease;
}
.csl-explainer-btn[aria-expanded="true"] .csl-explainer-btn-icon {
    transform: rotate(90deg);
}
.csl-explainer-btn-label { flex: 1; text-align: center; }

/* ── Panel ───────────────────────────────────────────────────── */
.csl-explainer-panel {
    margin-top: 1rem;
    border-radius: 12px;
    background: rgba(10,10,20,0.6);
    border: 1px solid rgba(79,70,229,0.2);
    overflow: hidden;
    animation: csl-panel-in 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}
.csl-explainer-panel[hidden] { display: none !important; }

@keyframes csl-panel-in {
    from { opacity: 0; transform: translateY(-6px); }
    to   { opacity: 1; transform: translateY(0);    }
}

/* ── Step Indicator ──────────────────────────────────────────── */
.csl-explainer-step-indicator {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(165,180,252,0.6);
    padding: 10px 16px 4px;
    text-align: center;
}

/* ── Visual Area (Flow Engine canvas) ───────────────────────── */
.csl-explainer-visual {
    width: 100%;
    background: rgba(0,0,0,0.25);
    border-bottom: 1px solid rgba(79,70,229,0.12);
    min-height: 180px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}
.csl-explainer-visual svg {
    width: 100%;
    height: auto;
    display: block;
}

/* Fallback when Flow Engine unavailable */
.csl-explainer-fallback {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    gap: 8px;
    color: rgba(165,180,252,0.6);
}
.csl-explainer-fallback-icon {
    font-size: 3rem;
    line-height: 1;
    filter: drop-shadow(0 0 12px rgba(201, 106, 61,0.25));
}
.csl-explainer-fallback-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    opacity: 0.7;
}

/* ── Phase Badge ─────────────────────────────────────────────── */
.csl-explainer-phase {
    display: block;
    text-align: center;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: rgba(201, 106, 61,0.55);
    padding: 10px 16px 0;
    min-height: 24px;
}

/* ── Step Text ───────────────────────────────────────────────── */
.csl-explainer-text {
    padding: 12px 20px 8px;
    font-size: 0.92rem;
    line-height: 1.65;
    color: rgba(240,240,255,0.88);
    text-align: center;
    min-height: 52px;
}

/* ── Navigation Row ──────────────────────────────────────────── */
.csl-explainer-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 10px 16px 14px;
    border-top: 1px solid rgba(79,70,229,0.1);
    flex-wrap: wrap;
}
.csl-explainer-counter {
    font-size: 0.8rem;
    font-weight: 600;
    color: rgba(165,180,252,0.7);
    text-align: center;
    flex: 1;
    min-width: 40px;
}
.csl-explainer-nav-btn {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    color: rgba(240,240,255,0.7);
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 6px 14px;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.12s;
    white-space: nowrap;
}
.csl-explainer-nav-btn:hover:not(:disabled) {
    background: rgba(79,70,229,0.14);
    border-color: rgba(129,140,248,0.3);
    color: #c7d2fe;
    transform: translateY(-1px);
}
.csl-explainer-nav-btn:active:not(:disabled) { transform: translateY(0); }
.csl-explainer-nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}
.csl-explainer-speak {
    background: rgba(201, 106, 61,0.07);
    border-color: rgba(201, 106, 61,0.2);
    color: rgba(201, 106, 61,0.75);
}
.csl-explainer-speak:hover:not(:disabled) {
    background: rgba(201, 106, 61,0.14);
    border-color: rgba(201, 106, 61,0.35);
    color: #c96a3d;
}

/* ── Light Mode ──────────────────────────────────────────────── */
[data-theme="light"] .csl-explainer-btn {
    background: rgba(45,122,120,0.08);
    border-color: rgba(45,122,120,0.25);
    color: #2d7a78;
}
[data-theme="light"] .csl-explainer-btn:hover {
    background: rgba(45,122,120,0.15);
    color: #1f5957;
}
[data-theme="light"] .csl-explainer-panel {
    background: #ffffff;
    border-color: rgba(45,122,120,0.15);
}
[data-theme="light"] .csl-explainer-text {
    color: #1e293b;
}
[data-theme="light"] .csl-explainer-step-indicator {
    color: #2d7a78;
}
[data-theme="light"] .csl-explainer-phase {
    color: #0d9488;
}
[data-theme="light"] .csl-explainer-counter {
    color: #2d7a78;
}
[data-theme="light"] .csl-explainer-nav-btn {
    background: rgba(45,122,120,0.07);
    border-color: rgba(45,122,120,0.2);
    color: #334155;
}
[data-theme="light"] .csl-explainer-nav-btn:hover:not(:disabled) {
    background: rgba(45,122,120,0.14);
    color: #1e293b;
}
[data-theme="light"] .csl-explainer-speak {
    background: rgba(13,148,136,0.08);
    border-color: rgba(13,148,136,0.25);
    color: #0d9488;
}
[data-theme="light"] .csl-explainer-speak:hover:not(:disabled) {
    background: rgba(13,148,136,0.15);
    color: #0f766e;
}
[data-theme="light"] .csl-explainer-visual {
    background: #f8fafc;
    border-bottom-color: rgba(79,70,229,0.1);
}
[data-theme="light"] .csl-explainer-fallback {
    color: rgba(79,70,229,0.6);
}

/* ── Responsive (narrow modals / mobile) ─────────────────────── */
@media (max-width: 480px) {
    .csl-explainer-nav {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
    .csl-explainer-nav-btn { width: 100%; }
    .csl-explainer-counter { order: -1; }
}