/* ==========================================================================
   练了么 — /coach layout
   Stage left, instruments right. The stage never scrolls out from under you.
   ========================================================================== */

.app-shell {
    width: 100%;
    max-width: var(--shell-wide);
    margin-inline: auto;
    padding: clamp(14px, 2vw, 22px) clamp(14px, 2.4vw, 26px) clamp(24px, 3vw, 40px);
    display: grid;
    grid-template-columns: minmax(0, 1fr) 348px;
    gap: 16px;
    align-items: start;
}

.stage {
    display: flex;
    flex-direction: column;
    gap: 14px;
    min-width: 0;
    position: sticky;
    top: 72px;
}

.stage-header {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}

.stage-title {
    font-size: clamp(21px, 2.4vw, 27px);
    font-weight: 690;
    letter-spacing: -0.032em;
}

.stage-copy {
    margin-top: 5px;
    font-size: 13.5px;
    line-height: 1.6;
    color: var(--text-2);
    max-width: 62ch;
}

.video-stage {
    aspect-ratio: 16 / 9;
    width: 100%;
}

/* --------------------------------------------------------------------------
   Setup strip beneath the stage
   -------------------------------------------------------------------------- */
.setup-strip {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr) auto;
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
    border-radius: var(--r-xl);
    overflow: hidden;
    box-shadow: var(--sh-sm);
}

.setup-copy {
    background: var(--surface);
    padding: 13px 16px;
    min-width: 0;
}

.setup-label {
    display: block;
    font-size: 10.5px;
    font-weight: 640;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--text-4);
    margin-bottom: 3px;
}

.setup-tip {
    display: block;
    font-size: 13px;
    line-height: 1.5;
    color: var(--text-2);
    overflow: hidden;
    text-overflow: ellipsis;
}

.setup-toggle {
    background: var(--surface);
    display: flex;
    align-items: center;
    padding: 13px 18px;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1180px) {
    .app-shell {
        grid-template-columns: minmax(0, 1fr);
    }

    .stage {
        position: static;
    }
}

@media (max-width: 720px) {
    .setup-strip {
        grid-template-columns: minmax(0, 1fr);
    }

    .video-stage {
        aspect-ratio: 4 / 3;
        border-radius: var(--r-xl);
    }

    .overlay-bottom {
        flex-direction: column;
        align-items: stretch;
    }

    .cue-card {
        max-width: none;
    }
}