/* ============================================================================
   course-widgets/cascade-flow.css -- widget #05 (mechanism)
   left-to-right step chain with an optional off/on metric toggle.
   off/on uses a danger hue because the state encodes meaning; the rest
   is theme-token based.
   ============================================================================ */

.cw-cascade { display: flex; flex-direction: column; gap: 16px; }

/* --- toggle row ---------------------------------------------------------- */
.cw-cf-toggle-row {
    display: flex; align-items: center; justify-content: center; gap: 12px;
}
.cw-cf-tlabel {
    font-size: 0.82rem; font-weight: 500; color: var(--cw-muted);
    transition: color .25s ease;
}
.cw-cf-tlabel.is-active { font-weight: 700; }
.cw-cf-tlabel--off.is-active { color: #ef4444; }
.cw-cf-tlabel--on.is-active { color: var(--cw-accent); }
.cw-cf-switch {
    position: relative; width: 48px; height: 26px; border-radius: 13px;
    background: #ef4444; cursor: pointer; border: 0; padding: 0;
    transition: background .25s ease;
}
.cw-cf-switch.is-on { background: var(--cw-accent); }
.cw-cf-switch:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--cw-accent-soft); }
.cw-cf-switch-thumb {
    position: absolute; top: 3px; left: 3px; width: 20px; height: 20px;
    border-radius: 50%; background: #fff; transition: transform .25s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, .3);
}
.cw-cf-switch.is-on .cw-cf-switch-thumb { transform: translateX(22px); }

/* --- step chain ---------------------------------------------------------- */
.cw-cf-chain {
    display: flex; align-items: stretch; flex-wrap: wrap; gap: 4px;
    justify-content: center;
}
.cw-cf-step { display: flex; align-items: center; gap: 4px; }
.cw-cf-node {
    display: flex; flex-direction: column; gap: 4px; justify-content: center;
    min-width: 110px; max-width: 170px; padding: 12px 14px;
    background: var(--cw-surface); border: 1px solid var(--cw-border);
    border-radius: var(--cw-radius); text-align: center;
    transition: opacity .25s ease, border-color .25s ease;
}
.cw-cf-node-label { font-weight: 700; font-size: 0.9rem; color: var(--cw-text); line-height: 1.25; }
.cw-cf-node-desc { font-size: 0.72rem; color: var(--cw-muted); line-height: 1.4; }
.cw-cf-arrow { font-size: 1.1rem; color: var(--cw-muted); flex-shrink: 0; }

/* suppressed look in the "on" state */
.cw-cf--on .cw-cf-node { opacity: 0.5; border-style: dashed; }
.cw-cf--on .cw-cf-arrow { opacity: 0.4; }

/* --- metrics grid -------------------------------------------------------- */
.cw-cf-metrics {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--cw-gap);
}
.cw-cf-metric {
    text-align: center; padding: 12px 8px; border-radius: var(--cw-radius);
    border: 1px solid var(--cw-border); background: var(--cw-surface);
}
.cw-cf-metric-v {
    font-size: 1.25rem; font-weight: 700; line-height: 1.2;
    color: #ef4444;
}
.cw-cf--on .cw-cf-metric-v { color: var(--cw-accent); }
.cw-cf-metric-k { margin-top: 3px; font-size: 0.74rem; color: var(--cw-muted); }
.cw-cf-note {
    margin: 0; text-align: center; font-size: 0.72rem; color: var(--cw-muted);
}

@media (max-width: 560px) {
    .cw-cf-chain { flex-direction: column; align-items: stretch; }
    .cw-cf-step { flex-direction: column; }
    .cw-cf-node { max-width: none; }
    .cw-cf-arrow { transform: rotate(90deg); }
}

/* --- typed-node upgrade (optional step.type / cargo / meta) --- */
.cw-cf-node-type {
    display: inline-block;
    font-size: 0.62rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    padding: 1px 7px;
    border-radius: 999px;
    margin-bottom: 5px;
    background: var(--cw-accent-soft);
    color: var(--cw-accent);
}
.cw-cf-node-cargo {
    display: block;
    font-size: 0.74rem;
    color: var(--cw-accent);
    margin-top: 4px;
    font-weight: 600;
}
.cw-cf-node-meta {
    display: block;
    font-size: 0.72rem;
    color: var(--cw-muted);
    margin-top: 3px;
}
/* semantic type tints (meaning-encoding; left border cue) */
.cw-cf-node--source  { border-left: 3px solid #3b82f6; }
.cw-cf-node--carrier { border-left: 3px solid #10b981; }
.cw-cf-node--target  { border-left: 3px solid #a855f7; }
.cw-cf-node--effect  { border-left: 3px solid #f59e0b; }
.cw-cf-node--source .cw-cf-node-type  { background: rgba(59,130,246,.14); color: #3b82f6; }
.cw-cf-node--target .cw-cf-node-type  { background: rgba(168,85,247,.14); color: #a855f7; }
.cw-cf-node--effect .cw-cf-node-type  { background: rgba(245,158,11,.14); color: #f59e0b; }