.air-page-heading {
    padding-bottom: 24px;
}


/* 요약 영역 */

.summary-strip {
    display: grid;
    grid-template-columns:
        repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.summary-item {
    display: flex;
    flex-direction: column;
    min-height: 108px;
    padding: 20px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--surface);
}

.summary-label {
    color: var(--text-secondary);
    font-size: 0.78rem;
}

.summary-item strong {
    margin-top: auto;
    font-size: 1.35rem;
    letter-spacing: -0.04em;
}

.summary-item .summary-date {
    font-size: 0.9rem;
}

.summary-grade-good {
    color: #2684ff;
}

.summary-grade-moderate {
    color: #19a866;
}


/* 검색 및 표시 설정 */

.air-controls {
    margin: 22px 0 14px;
    padding: 18px;
    border: 1px solid var(--border);
    border-radius: 22px;
    background: var(--surface);
}

.air-controls-top {
    display: grid;
    grid-template-columns:
        minmax(0, 1fr)
        minmax(180px, 230px);
    gap: 12px;
}

.station-search,
.station-sort {
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.control-label {
    color: var(--text-secondary);
    font-size: 0.73rem;
    font-weight: 700;
}

.search-input-wrap {
    position: relative;
    display: block;
}

.search-input-wrap svg {
    position: absolute;
    top: 50%;
    left: 14px;
    width: 18px;
    height: 18px;
    fill: none;
    stroke: var(--text-tertiary);
    stroke-width: 1.8;
    stroke-linecap: round;
    transform: translateY(-50%);
    pointer-events: none;
}

.station-search input,
.station-sort select {
    width: 100%;
    height: 46px;
    border: 1px solid var(--border);
    border-radius: 14px;
    color: var(--text-primary);
    background: var(--surface-soft);
    outline: none;
}

.station-search input {
    padding: 0 14px 0 43px;
}

.station-sort select {
    padding: 0 38px 0 14px;
    cursor: pointer;
}

.station-search input:focus,
.station-sort select:focus {
    border-color: var(--accent);
    box-shadow:
        0 0 0 3px var(--accent-soft);
}

.station-search input::placeholder {
    color: var(--text-tertiary);
}

.air-controls-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.grade-standard {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.grade-standard-title {
    font-size: 0.82rem;
    font-weight: 800;
}

.grade-standard-description {
    margin-top: 3px;
    color: var(--text-tertiary);
    font-size: 0.7rem;
}

.detail-toggle {
    display: inline-flex;
    align-items: center;
    flex: 0 0 auto;
    gap: 10px;
    cursor: pointer;
}

.detail-toggle-text {
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 700;
}

.detail-toggle input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

.toggle-track {
    position: relative;
    width: 46px;
    height: 26px;
    border-radius: 999px;
    background: var(--border);
    transition: background-color 160ms ease;
}

.toggle-thumb {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #ffffff;
    box-shadow:
        0 1px 4px rgba(0, 0, 0, 0.22);
    transition: transform 160ms ease;
}

.detail-toggle input:checked + .toggle-track {
    background: var(--accent);
}

.detail-toggle input:checked
+ .toggle-track
.toggle-thumb {
    transform: translateX(20px);
}

.detail-toggle input:focus-visible
+ .toggle-track {
    outline: 3px solid var(--accent-soft);
}

.search-result-status {
    margin: 0 2px 12px;
    color: var(--text-tertiary);
    font-size: 0.74rem;
}


/* 측정소 카드 */

.station-grid {
    display: grid;
    grid-template-columns:
        repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.station-card {
    --station-grade-color: var(--text-tertiary);

    padding: 22px;
    border: 1px solid var(--border);
    border-top: 4px solid var(--station-grade-color);
    border-radius: 24px;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.station-grade-good {
    --station-grade-color: #2684ff;
}

.station-grade-moderate {
    --station-grade-color: #22a866;
}

.station-grade-bad {
    --station-grade-color: #f59f00;
}

.station-grade-very-bad {
    --station-grade-color: #e5484d;
}

.station-grade-unknown {
    --station-grade-color: var(--text-tertiary);
}

.station-card-stale {
    opacity: 0.82;
}

.station-heading {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 14px;
}

.station-title-group {
    min-width: 0;
}

.station-heading h2 {
    margin: 0;
    font-size: 1.13rem;
    letter-spacing: -0.04em;
}

.station-heading p {
    margin: 5px 0 0;
    color: var(--text-tertiary);
    font-size: 0.72rem;
}

.station-status-group {
    display: flex;
    align-items: flex-end;
    flex-direction: column;
    flex: 0 0 auto;
    gap: 6px;
}

.overall-grade-badge,
.pollutant-grade,
.stale-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    font-weight: 800;
    white-space: nowrap;
}

.overall-grade-badge {
    min-width: 56px;
    padding: 6px 10px;
    font-size: 0.72rem;
}

.stale-badge {
    padding: 4px 8px;
    color: var(--warning);
    background: var(--warning-soft);
    font-size: 0.62rem;
}


/* 등급 색상 */

.grade-good {
    color: #1b6ed1;
    background: #e4f1ff;
}

.grade-moderate {
    color: #14824d;
    background: #e3f7ed;
}

.grade-bad {
    color: #a96600;
    background: #fff1cc;
}

.grade-very-bad {
    color: #c3373d;
    background: #ffe7e8;
}

.grade-unknown {
    color: var(--text-secondary);
    background: var(--surface-soft);
}

html[data-theme="dark"] .grade-good {
    color: #7ab9ff;
    background: rgba(38, 132, 255, 0.17);
}

html[data-theme="dark"] .grade-moderate {
    color: #69dda5;
    background: rgba(34, 168, 102, 0.17);
}

html[data-theme="dark"] .grade-bad {
    color: #ffd078;
    background: rgba(245, 159, 0, 0.17);
}

html[data-theme="dark"] .grade-very-bad {
    color: #ff8c91;
    background: rgba(229, 72, 77, 0.17);
}


/* 오염물질 항목 */

.pollutant-grid {
    display: grid;
    grid-template-columns:
        repeat(3, minmax(0, 1fr));
    gap: 8px;
    margin-top: 18px;
}

.pollutant-item {
    position: relative;
    min-width: 0;
    padding: 13px 10px 12px;
    border: 1px solid transparent;
    border-radius: 15px;
    background: var(--surface-soft);
    text-align: center;
}

.grade-panel-good {
    border-color: rgba(38, 132, 255, 0.18);
}

.grade-panel-moderate {
    border-color: rgba(34, 168, 102, 0.2);
}

.grade-panel-bad {
    border-color: rgba(245, 159, 0, 0.25);
}

.grade-panel-very-bad {
    border-color: rgba(229, 72, 77, 0.25);
}

.pollutant-name,
.pollutant-item small {
    display: block;
}

.pollutant-name {
    overflow: hidden;
    color: var(--text-secondary);
    font-size: 0.7rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.pollutant-item strong {
    display: block;
    margin: 5px 0 2px;
    font-size: 1rem;
}

.pollutant-item small {
    color: var(--text-tertiary);
    font-size: 0.58rem;
}

.pollutant-grade {
    margin-top: 8px;
    padding: 3px 7px;
    font-size: 0.6rem;
}

.pollutant-detail {
    display: none;
}

html.air-details-visible .pollutant-detail {
    display: block;
}


/* 검색 결과 없음 */

.no-search-result {
    display: grid;
    place-items: center;
    min-height: 270px;
    padding: 42px 20px;
    border: 1px solid var(--border);
    border-radius: 24px;
    background: var(--surface);
    text-align: center;
}

.no-search-result[hidden] {
    display: none;
}

.no-search-result h2 {
    margin: 15px 0 0;
    font-size: 1.16rem;
}

.no-search-result p {
    margin: 6px 0 0;
    color: var(--text-secondary);
    font-size: 0.86rem;
}


/* 반응형 */

@media (max-width: 860px) {
    .summary-strip {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));
    }

    .station-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 620px) {
    .air-controls-top {
        grid-template-columns: 1fr;
    }

    .air-controls-bottom {
        align-items: flex-start;
        flex-direction: column;
    }

    .detail-toggle {
        align-self: stretch;
        justify-content: space-between;
    }
}

@media (max-width: 520px) {
    .summary-strip {
        gap: 8px;
    }

    .summary-item {
        min-height: 94px;
        padding: 15px;
        border-radius: 17px;
    }

    .summary-item strong {
        font-size: 1.12rem;
    }

    .summary-item .summary-date {
        font-size: 0.78rem;
    }

    .air-controls {
        padding: 15px;
        border-radius: 19px;
    }

    .station-card {
        padding: 17px;
        border-radius: 20px;
    }

    .pollutant-grid {
        grid-template-columns:
            repeat(3, minmax(0, 1fr));
        gap: 6px;
    }

    .pollutant-item {
        padding: 11px 5px 10px;
    }

    .pollutant-name {
        font-size: 0.63rem;
    }

    .pollutant-item strong {
        font-size: 0.91rem;
    }

    .pollutant-item small {
        font-size: 0.52rem;
    }
}

@media (max-width: 370px) {
    .pollutant-grid {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));
    }
}