.obs-course-list {
    --obs-course-list-ink: #1c2335;
    --obs-course-list-green: #9bcf4a;
    --obs-course-list-muted: #646873;
    width: 100%;
    border-block: 1px solid #d8d8d4;
    color: var(--obs-course-list-ink);
}

.obs-course-list,
.obs-course-list * { box-sizing: border-box; }
.obs-course-list > summary { list-style: none; }
.obs-course-list > summary::-webkit-details-marker { display: none; }

.obs-course-list__summary {
    display: flex;
    min-height: 76px;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    padding: 1rem clamp(20px, 3vw, 2rem);
    color: inherit;
    font-size: clamp(1.05rem, 1.7vw, 1.35rem);
    font-weight: 700;
    line-height: 1.3;
    cursor: pointer;
}

.obs-course-list__summary:hover { background: #f5f5f2; }
.obs-course-list__summary:focus-visible { outline: 3px solid var(--obs-course-list-green); outline-offset: 3px; }

.obs-course-list[open] > .obs-course-list__summary {
    position: sticky;
    z-index: 5;
    top: var(--obs-sticky-main-offset, var(--wp-admin--admin-bar--height, 0px));
    border-bottom: 1px solid #d8d8d4;
    background: #fff;
    box-shadow: 0 8px 18px rgb(28 35 53 / 8%);
}

.obs-course-list__toggle {
    position: relative;
    width: 1.8rem;
    height: 1.8rem;
    flex: 0 0 auto;
}

.obs-course-list__toggle::before,
.obs-course-list__toggle::after {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1.25rem;
    height: 2px;
    background: currentColor;
    content: "";
    transform: translate(-50%, -50%);
    transition: transform .25s ease, opacity .2s ease;
}

.obs-course-list__toggle::after { transform: translate(-50%, -50%) rotate(90deg); }
.obs-course-list[open] .obs-course-list__toggle::after { opacity: 0; transform: translate(-50%, -50%) rotate(0); }
.obs-course-list__panel { overflow: hidden; overflow-anchor: none; }
.obs-course-list__inner { padding: clamp(1.25rem, 3vw, 2.5rem); border-top: 1px solid #d8d8d4; background: #f7f7f4; }

.obs-course-list__locations {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(1.75rem, 3vw, 3rem);
    align-items: start;
}

.obs-course-list__location {
    min-width: 0;
    overflow: hidden;
    border: 1px solid #d8d8d4;
    border-radius: 3px;
    background: #fff;
    box-shadow: 0 5px 16px rgb(28 35 53 / 5%);
}

.obs-course-list__location-header {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: .8rem;
    align-items: start;
    margin: 0;
    padding: 1rem 1.1rem;
    border-left: 5px solid var(--obs-course-list-green);
    background: #eef3e7;
}

.obs-course-list__location-label {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    background: var(--obs-course-list-green);
    color: var(--obs-course-list-ink);
    padding: .27rem .55rem;
    font-size: .68rem;
    font-weight: 800;
    letter-spacing: .045em;
    line-height: 1;
    text-transform: uppercase;
}

.obs-course-list__location-header h3 { margin: 0; color: inherit; font-size: clamp(1.05rem, 1.6vw, 1.25rem); line-height: 1.3; }
.obs-course-list__location-header p { display: flex; flex-wrap: wrap; margin: .25rem 0 0; color: var(--obs-course-list-muted); font-size: .9rem; line-height: 1.4; }
.obs-course-list__courses { margin: 0; padding: 0; list-style: none; }

.obs-course-list__courses li {
    display: grid;
    grid-template-columns: minmax(6.3rem, auto) minmax(0, 1fr);
    gap: 1rem;
    align-items: center;
    padding: .9rem 1.1rem;
    border-top: 1px solid #e3e3df;
}

.obs-course-list__courses time {
    padding: .45rem .6rem;
    border-left: 3px solid var(--obs-course-list-green);
    background: #f4f7ef;
}

.obs-course-list__courses time span,
.obs-course-list__courses time strong { display: block; }
.obs-course-list__courses time span { color: var(--obs-course-list-muted); font-size: .72rem; text-transform: uppercase; letter-spacing: .04em; }
.obs-course-list__courses time strong { font-size: .92rem; }
.obs-course-list__course-title { display: flex; min-width: 0; flex-wrap: wrap; gap: .3rem .65rem; align-items: baseline; }
.obs-course-list__course-title a { color: inherit; font-weight: 600; text-decoration-thickness: 1px; text-underline-offset: 3px; overflow-wrap: anywhere; }
.obs-course-list__sold-out { color: #a52e2e; font-size: .75rem; font-weight: 700; letter-spacing: .03em; text-transform: uppercase; }
.obs-course-list__empty { margin: 0; color: var(--obs-course-list-muted); }

@media (max-width: 800px) {
    .obs-course-list__locations { grid-template-columns: 1fr; }

    .obs-course-list__inner {
        padding-right: max(20px, env(safe-area-inset-right));
        padding-left: max(20px, env(safe-area-inset-left));
    }
}

@media (max-width: 600px) {
    .obs-course-list {
        width: 100%;
        margin-right: 0;
        margin-left: 0;
    }

    .obs-course-list__summary {
        padding-right: max(20px, env(safe-area-inset-right));
        padding-left: max(20px, env(safe-area-inset-left));
    }

    .obs-course-list__inner {
        padding-right: max(20px, env(safe-area-inset-right));
        padding-left: max(20px, env(safe-area-inset-left));
        background: transparent;
    }

    .obs-course-list__location-header {
        grid-template-columns: 1fr;
        gap: .55rem;
    }

    .obs-course-list__location-label { justify-self: start; }
    .obs-course-list__courses li { grid-template-columns: 1fr; gap: .55rem; }
    .obs-course-list__courses time { width: max-content; }
}

@media (prefers-reduced-motion: reduce) {
    .obs-course-list__toggle::before,
    .obs-course-list__toggle::after { transition: none; }
}