:root {
    --color-brand: #ef4444;
    --color-cta: #f59e0b;
    --text-muted: #777;
    --border: #ddd;
}

*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    overflow-x: hidden;
}

* {
    font-family: var(--font-main);
    line-height: 1.6;
    max-width: 100%;
    overflow-wrap: break-word;
    word-wrap: break-word;
}

body {
    font-size: 16px;
    font-weight: 400;
    color: #222;
    background-color: #fff;
}

img, video, svg {
    max-width: 100%;
    height: auto;
    display: block;
}

.cat-main {
    width: 100%;
}

.cat-container {
    width: 90%;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
}

.cat-hero {
    position: relative;
    height: 480px;
    overflow: hidden;
    background-color: #111;
}

.cat-hero__bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.cat-hero__bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.cat-hero__overlay {
    position: absolute;
    inset: 0;
    z-index: 1;
    background-color: rgba(0, 0, 0, 0.55);
}

.cat-hero__content {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 24px;
}

.cat-hero__title {
    font-size: 3rem;
    font-weight: 700;
    color: #fff;
    margin: 0 0 16px 0;
}

.cat-hero__title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--color-brand);
    margin: 16px auto 0;
    border-radius: 2px;
}

.cat-hero__subtitle {
    font-size: 1.1rem;
    font-weight: 400;
    color: #eee;
    max-width: 660px;
    margin: 0;
}

.cat-articles {
    padding: 56px 0 48px;
    background-color: #fff;
}

.cat-articles__header {
    display: flex;
    align-items: baseline;
    gap: 20px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.cat-articles__title {
    font-size: 1.6rem;
    font-weight: 700;
    color: #111;
    margin: 0;
}

.cat-articles__title::before {
    content: '';
    display: inline-block;
    width: 6px;
    height: 24px;
    background-color: var(--color-brand);
    border-radius: 3px;
    margin-right: 12px;
    vertical-align: middle;
}

.cat-articles__count {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text-muted);
    margin: 0;
}

.masonry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    align-items: start;
}

.masonry-card {
    background-color: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    transition: box-shadow 0.2s, border-color 0.2s;
}

.masonry-card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    border-color: #bbb;
}

.masonry-card--featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.masonry-card__img-wrap {
    position: relative;
    overflow: hidden;
    background-color: #e8e8e8;
}

.masonry-card--featured .masonry-card__img-wrap {
    min-height: 300px;
}

.masonry-card:not(.masonry-card--featured) .masonry-card__img-wrap {
    height: 200px;
}

.masonry-card__img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.masonry-card:hover .masonry-card__img {
    transform: translateY(-3px);
}

.masonry-card__overlay {
    position: absolute;
    inset: 0;
    background-color: rgba(239, 68, 68, 0);
    transition: background-color 0.2s;
}

.masonry-card:hover .masonry-card__overlay {
    background-color: rgba(239, 68, 68, 0.06);
}

.masonry-card__body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.masonry-card--featured .masonry-card__body {
    padding: 32px;
    justify-content: center;
}

.masonry-card__meta {
    display: flex;
    align-items: center;
    gap: 12px;
}

.masonry-card__date {
    font-size: 13px;
    font-weight: 400;
    color: var(--text-muted);
}

.masonry-card__title {
    font-size: 1.1rem;
    font-weight: 700;
    color: #111;
    margin: 0;
}

.masonry-card--featured .masonry-card__title {
    font-size: 1.5rem;
}

.masonry-card__title a {
    color: #111;
    text-decoration: none;
    transition: color 0.2s;
}

.masonry-card__title a:hover {
    color: var(--color-brand);
}

.masonry-card__desc {
    font-size: 0.95rem;
    font-weight: 400;
    color: #555;
    margin: 0;
}

.cat-empty {
    text-align: center;
    padding: 60px 24px;
    background-color: #fafafa;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.cat-empty__icon {
    margin-bottom: 20px;
}

.cat-empty__text {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-muted);
    margin: 0;
}

.cat-stats {
    padding: 56px 0;
    background-color: #111;
}

.cat-stats__title {
    font-size: 1.6rem;
    font-weight: 700;
    color: #fff;
    margin: 0 0 8px 0;
    text-align: center;
}

.cat-stats__title,
.cat-stats__disclaimer,
.cat-stats__circles,
.stat-circle__val,
.stat-circle__label {
    color: inherit;
}

.cat-stats .cat-stats__title { color: #fff; }
.cat-stats .cat-stats__disclaimer { color: #aaa; }
.cat-stats .stat-circle__val { color: #fff; }
.cat-stats .stat-circle__label { color: #ccc; }

.cat-stats__disclaimer {
    font-size: 13px;
    font-weight: 400;
    color: #aaa;
    text-align: center;
    margin: 0 auto 40px;
    max-width: 600px;
}

.cat-stats__circles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 32px;
    justify-items: center;
}

.stat-circle {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    position: relative;
}

.stat-circle__svg {
    display: block;
}

.stat-circle__ring {
    transition: stroke-dashoffset 1s ease;
}

.stat-circle__inner {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-circle__val {
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
}

.stat-circle__label {
    font-size: 13px;
    font-weight: 400;
    color: #ccc;
    text-align: center;
    max-width: 160px;
    margin: 0;
}

.cat-table-section {
    padding: 56px 0;
    background-color: #fafafa;
}

.cat-table__title {
    font-size: 1.6rem;
    font-weight: 700;
    color: #111;
    margin: 0 0 12px 0;
}

.cat-table__intro {
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--text-muted);
    margin: 0 0 28px 0;
}

.cat-table__wrap {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.cat-table {
    width: 100%;
    border-collapse: collapse;
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.cat-table thead tr {
    background-color: var(--color-brand);
}

.cat-table th {
    padding: 14px 18px;
    text-align: left;
    font-size: 14px;
    font-weight: 700;
    color: #fff;
    white-space: nowrap;
}

.cat-table tbody tr {
    border-bottom: 1px solid var(--border);
    transition: background-color 0.2s;
}

.cat-table tbody tr:last-child {
    border-bottom: none;
}

.cat-table tbody tr:hover {
    background-color: #fff4f4;
}

.cat-table td {
    padding: 14px 18px;
    font-size: 0.95rem;
    font-weight: 400;
    color: #333;
    vertical-align: middle;
}

.cat-table td:first-child {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
}

.mode-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
}

.cat-heatmap {
    padding: 56px 0;
    background-color: #fff;
}

.cat-heatmap__title {
    font-size: 1.6rem;
    font-weight: 700;
    color: #111;
    margin: 0 0 12px 0;
}

.cat-heatmap__intro {
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--text-muted);
    margin: 0 0 32px 0;
    max-width: 680px;
}

.heatmap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.heatmap-region {
    display: grid;
    grid-template-columns: 1fr auto auto;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background-color: #fafafa;
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: border-color 0.2s, background-color 0.2s;
}

.heatmap-region:hover {
    border-color: var(--color-brand);
    background-color: #fff4f4;
}

.heatmap-region__bar {
    grid-column: 1 / -1;
    height: 6px;
    background-color: #e0e0e0;
    border-radius: 3px;
    overflow: hidden;
}

.heatmap-region__fill {
    height: 100%;
    width: var(--heat);
    border-radius: 3px;
    background-color: var(--color-brand);
    transition: width 0.8s ease;
}

.heatmap-region--warm .heatmap-region__fill {
    background-color: #f87171;
}

.heatmap-region--medium .heatmap-region__fill {
    background-color: #fca5a5;
}

.heatmap-region--cool .heatmap-region__fill {
    background-color: #fecaca;
}

.heatmap-region__name {
    font-size: 0.9rem;
    font-weight: 700;
    color: #222;
    grid-column: 1;
    grid-row: 1;
}

.heatmap-region__score {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-brand);
    grid-column: 3;
    grid-row: 1;
}

.heatmap-legend {
    margin: 24px 0 0 0;
    font-size: 13px;
    font-weight: 400;
    color: var(--text-muted);
}

.cat-tips {
    padding: 56px 0;
    background-color: #111;
}

.cat-tips__title {
    font-size: 1.6rem;
    font-weight: 700;
    color: #fff;
    margin: 0 0 32px 0;
    text-align: center;
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}

.tip-card {
    background-color: #1a1a1a;
    border: 1px solid #333;
    border-radius: 8px;
    padding: 28px 24px;
    transition: border-color 0.2s, background-color 0.2s;
}

.tip-card:hover {
    border-color: var(--color-brand);
    background-color: #1f1f1f;
}

.tip-card__icon {
    margin-bottom: 16px;
}

.tip-card__heading {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin: 0 0 10px 0;
}

.tip-card__text {
    font-size: 0.9rem;
    font-weight: 400;
    color: #aaa;
    margin: 0;
}

@media (max-width: 900px) {
    .masonry-card--featured {
        grid-template-columns: 1fr;
    }

    .masonry-card--featured .masonry-card__img-wrap {
        min-height: 220px;
    }

    .masonry-card--featured .masonry-card__body {
        padding: 20px;
    }

    .masonry-card--featured .masonry-card__title {
        font-size: 1.2rem;
    }
}

@media (max-width: 768px) {
    .cat-hero {
        height: 360px;
    }

    .cat-hero__title {
        font-size: 2rem;
    }

    .cat-hero__subtitle {
        font-size: 0.95rem;
    }

    .cat-articles {
        padding: 36px 0 32px;
    }

    .cat-articles__header {
        flex-direction: column;
        gap: 8px;
        margin-bottom: 24px;
    }

    .cat-articles__title {
        font-size: 1.3rem;
    }

    .masonry-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .masonry-card--featured {
        grid-column: auto;
        grid-template-columns: 1fr;
    }

    .masonry-card:not(.masonry-card--featured) .masonry-card__img-wrap {
        height: 180px;
    }

    .cat-stats {
        padding: 36px 0;
    }

    .cat-stats__title {
        font-size: 1.3rem;
    }

    .cat-stats__circles {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .cat-table-section {
        padding: 36px 0;
    }

    .cat-table__title {
        font-size: 1.3rem;
    }

    .cat-table th,
    .cat-table td {
        padding: 10px 12px;
        font-size: 13px;
    }

    .cat-heatmap {
        padding: 36px 0;
    }

    .cat-heatmap__title {
        font-size: 1.3rem;
    }

    .heatmap-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .cat-tips {
        padding: 36px 0;
    }

    .cat-tips__title {
        font-size: 1.3rem;
    }

    .tips-grid {
        grid-template-columns: 1fr;
        gap: 14px;
    }

    .cat-container {
        padding: 0 16px;
    }
}

@media (max-width: 480px) {
    .cat-hero {
        height: 280px;
    }

    .cat-hero__title {
        font-size: 1.6rem;
    }

    .cat-hero__subtitle {
        font-size: 0.875rem;
    }

    .cat-stats__circles {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .stat-circle__svg {
        width: 90px;
        height: 90px;
    }

    .stat-circle__inner {
        width: 90px;
        height: 90px;
    }

    .stat-circle__val {
        font-size: 1.1rem;
    }

    .cat-table td:first-child {
        gap: 6px;
    }

    .heatmap-region {
        padding: 10px 12px;
    }

    .heatmap-region__name {
        font-size: 0.85rem;
    }
}