/* Hair knowledge hub — page-scoped. Do not restyle global tokens or buttons. */

.hh-knowledge__hero {
 position: relative;
 padding: clamp(2.75rem, 6vw, 4.75rem) 0 clamp(2rem, 4vw, 3rem);
 background-color: var(--hh-cream);
 background-image:
 linear-gradient(180deg, rgba(250, 247, 242, 0.78) 0%, rgba(247, 244, 239, 0.86) 58%, var(--hh-paper) 100%),
 url("../images/hero/hero-marble-white.webp");
 background-repeat: no-repeat;
 background-position: center top;
 background-size: cover;
 border-bottom: 1px solid var(--hh-line);
}

.hh-knowledge__hero h1 {
 margin: 0 0 1rem;
 max-width: 16em;
 font-family: var(--hh-serif);
 font-weight: 300;
 font-size: clamp(2.15rem, 4.8vw, 3.35rem);
 line-height: 1.28;
 letter-spacing: 0.06em;
 color: var(--hh-ink);
}

.hh-knowledge__hero .hh-lede {
 max-width: 42rem;
 margin: 0;
 font-size: 1.05rem;
 line-height: 1.9;
 color: var(--hh-ink-soft);
}

.hh-knowledge__toc {
 display: flex;
 gap: 0.55rem;
 margin: 1.75rem 0 0;
 padding: 0 0 0.15rem;
 overflow-x: auto;
 -webkit-overflow-scrolling: touch;
 scrollbar-width: none;
 padding-right: 0.25rem;
}

.hh-knowledge__toc::-webkit-scrollbar {
 display: none;
}

.hh-knowledge__toc a {
 flex: 0 0 auto;
 min-height: 44px;
 display: inline-flex;
 align-items: center;
 padding: 0.55rem 1rem;
 border: 1px solid var(--hh-line);
 border-radius: 999px;
 background: rgba(255, 255, 255, 0.78);
 color: var(--hh-ink);
 font-size: 0.92rem;
 line-height: 1.3;
 text-decoration: none;
}

.hh-knowledge__toc a:hover,
.hh-knowledge__toc a:focus-visible {
 border-color: var(--hh-orange);
 color: var(--hh-orange);
 outline: none;
}

.hh-knowledge__section {
 padding: clamp(3rem, 6vw, 4.75rem) 0;
}

.hh-knowledge__section--wash {
 background: var(--hh-paper-2, #f7f4ef);
}

.hh-knowledge__section h2 {
 margin: 0 0 0.75rem;
 font-family: var(--hh-serif);
 font-weight: 400;
 font-size: clamp(1.55rem, 2.5vw, 2.05rem);
 line-height: 1.4;
 letter-spacing: 0.04em;
 color: var(--hh-ink);
}

.hh-knowledge__intro {
 max-width: 42rem;
 margin: 0 0 1.75rem;
 color: var(--hh-ink-soft);
 font-size: 1.02rem;
 line-height: 1.85;
}

.hh-knowledge__intro a {
 color: var(--hh-ink);
}

.hh-knowledge__intro a:hover {
 color: var(--hh-orange);
}

/* —— Topic category tiles (with images) —— */

.hh-knowledge__topics {
 display: grid;
 grid-template-columns: repeat(3, minmax(0, 1fr));
 gap: 1.25rem;
 margin: 0;
 padding: 0;
 list-style: none;
}

.hh-knowledge__topics > li {
 display: flex;
 min-width: 0;
}

.hh-knowledge__topic {
 display: flex;
 flex-direction: column;
 flex: 1;
 min-width: 0;
 overflow: hidden;
 background: var(--hh-white);
 border: 1px solid var(--hh-line);
 border-radius: var(--hh-radius-lg);
 color: inherit;
 text-decoration: none;
 transition: border-color var(--hh-ease), transform var(--hh-ease);
}

.hh-knowledge__topic:hover,
.hh-knowledge__topic:focus-visible {
 border-color: var(--hh-orange);
 color: inherit;
 transform: translateY(-2px);
 outline: none;
}

.hh-knowledge__topic-media {
 position: relative;
 aspect-ratio: 4 / 3;
 overflow: hidden;
 background: #ebe4da;
}

.hh-knowledge__topic-media img {
 width: 100%;
 height: 100%;
 object-fit: cover;
 display: block;
 transition: transform 0.55s ease;
}

.hh-knowledge__topic:hover .hh-knowledge__topic-media img,
.hh-knowledge__topic:focus-visible .hh-knowledge__topic-media img {
 transform: scale(1.04);
}

.hh-knowledge__topic-body {
 display: flex;
 flex-direction: column;
 flex: 1;
 padding: 1.2rem 1.25rem 1.3rem;
}

.hh-knowledge__topic h3 {
 margin: 0 0 0.5rem;
 font-family: var(--hh-serif);
 font-weight: 500;
 font-size: 1.18rem;
 line-height: 1.4;
 letter-spacing: 0.03em;
 color: var(--hh-ink);
}

.hh-knowledge__topic p {
 margin: 0;
 flex: 1;
 color: var(--hh-ink-soft);
 font-size: 0.94rem;
 line-height: 1.75;
}

.hh-knowledge__more {
 display: inline-flex;
 align-items: center;
 margin-top: 1rem;
 font-size: 0.92rem;
 color: var(--hh-ink);
}

.hh-knowledge__topic:hover .hh-knowledge__more,
.hh-knowledge__topic:focus-visible .hh-knowledge__more {
 color: var(--hh-orange);
}

/* —— Articles toolbar + grid —— */

.hh-knowledge__toolbar {
 display: grid;
 gap: 1.1rem;
 margin: 0 0 1.65rem;
}

.hh-knowledge__search {
 position: relative;
 max-width: 28rem;
}

.hh-knowledge__search-label {
 position: absolute;
 width: 1px;
 height: 1px;
 padding: 0;
 margin: -1px;
 overflow: hidden;
 clip: rect(0, 0, 0, 0);
 white-space: nowrap;
 border: 0;
}

.hh-knowledge__search-input {
 width: 100%;
 min-height: 48px;
 padding: 0.75rem 1.1rem 0.75rem 2.85rem;
 border: 1px solid var(--hh-line);
 border-radius: 999px;
 background: var(--hh-white) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' fill='none' stroke='%238a8278' stroke-width='1.6' stroke-linecap='round'%3E%3Ccircle cx='7.5' cy='7.5' r='5.2'/%3E%3Cpath d='M11.5 11.5 15 15'/%3E%3C/svg%3E") 1.05rem 50% no-repeat;
 color: var(--hh-ink);
 font-size: 1rem;
 line-height: 1.4;
 font-family: inherit;
}

.hh-knowledge__search-input::placeholder {
 color: var(--hh-muted, #8a8278);
}

.hh-knowledge__search-input:focus {
 outline: none;
 border-color: var(--hh-orange);
 box-shadow: 0 0 0 3px rgba(196, 132, 84, 0.15);
}

.hh-knowledge__filters {
 display: flex;
 flex-wrap: wrap;
 gap: 0.5rem;
}

.hh-knowledge__filter {
 min-height: 42px;
 padding: 0.45rem 1rem;
 border: 1px solid var(--hh-line);
 border-radius: 999px;
 background: rgba(255, 255, 255, 0.9);
 color: var(--hh-ink-soft);
 font-size: 0.92rem;
 font-family: inherit;
 cursor: pointer;
 transition: border-color var(--hh-ease), background var(--hh-ease), color var(--hh-ease);
}

.hh-knowledge__filter:hover {
 border-color: var(--hh-orange);
 color: var(--hh-ink);
}

.hh-knowledge__filter.is-active,
.hh-knowledge__filter[aria-pressed="true"] {
 border-color: var(--hh-orange);
 background: rgba(196, 132, 84, 0.1);
 color: var(--hh-ink);
}

.hh-knowledge__count {
 margin: 0 0 1.15rem;
 color: var(--hh-muted, #8a8278);
 font-size: 0.92rem;
}

.hh-knowledge__articles {
 display: grid;
 grid-template-columns: repeat(3, minmax(0, 1fr));
 gap: 1.25rem;
 margin: 0;
 padding: 0;
 list-style: none;
}

.hh-knowledge__articles > li {
 display: flex;
 min-width: 0;
}

.hh-knowledge__articles > li[hidden] {
 display: none;
}

.hh-knowledge__article {
 display: flex;
 flex-direction: column;
 flex: 1;
 min-width: 0;
 overflow: hidden;
 background: var(--hh-white);
 border: 1px solid var(--hh-line);
 border-radius: var(--hh-radius-lg);
 color: inherit;
 text-decoration: none;
 transition: border-color var(--hh-ease), transform var(--hh-ease);
}

.hh-knowledge__article:hover,
.hh-knowledge__article:focus-visible {
 border-color: var(--hh-orange);
 color: inherit;
 transform: translateY(-2px);
 outline: none;
}

.hh-knowledge__article-media {
 position: relative;
 aspect-ratio: 16 / 11;
 overflow: hidden;
 background: #ebe4da;
}

.hh-knowledge__article-media img {
 width: 100%;
 height: 100%;
 object-fit: cover;
 display: block;
 transition: transform 0.55s ease;
}

.hh-knowledge__article:hover .hh-knowledge__article-media img,
.hh-knowledge__article:focus-visible .hh-knowledge__article-media img {
 transform: scale(1.04);
}

.hh-knowledge__article-body {
 display: flex;
 flex-direction: column;
 flex: 1;
 padding: 1.15rem 1.2rem 1.25rem;
}

.hh-knowledge__tag {
 display: inline-flex;
 align-self: flex-start;
 margin: 0 0 0.55rem;
 padding: 0.22rem 0.65rem;
 border-radius: 999px;
 background: rgba(196, 132, 84, 0.1);
 color: var(--hh-orange);
 font-size: 0.78rem;
 letter-spacing: 0.06em;
 line-height: 1.4;
}

.hh-knowledge__article h3 {
 margin: 0 0 0.5rem;
 font-family: var(--hh-serif);
 font-weight: 500;
 font-size: 1.12rem;
 line-height: 1.45;
 letter-spacing: 0.02em;
 color: var(--hh-ink);
}

.hh-knowledge__article p {
 margin: 0;
 flex: 1;
 color: var(--hh-ink-soft);
 font-size: 0.93rem;
 line-height: 1.75;
}

.hh-knowledge__empty {
 margin: 0.5rem 0 0;
 padding: 1.5rem 1.25rem;
 border: 1px dashed var(--hh-line);
 border-radius: var(--hh-radius-lg);
 background: rgba(255, 255, 255, 0.55);
 color: var(--hh-ink-soft);
 text-align: center;
 line-height: 1.75;
}

.hh-knowledge .hh-faq {
 max-width: 46rem;
 gap: 0;
}

.hh-knowledge .hh-faq__item {
 border: 0;
 border-bottom: 1px solid var(--hh-line);
 border-radius: 0;
 background: transparent;
 padding: 0.35rem 0;
}

.hh-knowledge .hh-faq__item summary {
 font-family: var(--hh-serif);
 font-weight: 500;
 font-size: 1.08rem;
 line-height: 1.55;
 letter-spacing: 0.02em;
 min-height: 44px;
 display: flex;
 align-items: center;
 padding: 0.85rem 0;
}

.hh-knowledge .hh-faq__item[open] summary {
 color: var(--hh-ink);
 margin-bottom: 0;
}

.hh-knowledge .hh-faq__item p {
 margin: 0 0 1rem;
 max-width: 42rem;
 color: var(--hh-ink-soft);
 line-height: 1.85;
}

.hh-knowledge__actions {
 display: flex;
 flex-wrap: wrap;
 gap: 0.75rem;
 margin: 1.35rem 0 0;
}

.hh-knowledge__note {
 max-width: 46rem;
 margin: 1.6rem 0 0;
 color: var(--hh-muted);
 font-size: 0.9rem;
 line-height: 1.8;
}

@media (max-width: 900px) {
 .hh-knowledge__topics,
 .hh-knowledge__articles {
 grid-template-columns: repeat(2, minmax(0, 1fr));
 }
}

@media (max-width: 720px) {
 .hh-knowledge__hero {
 background-image:
 linear-gradient(180deg, rgba(250, 247, 242, 0.82) 0%, rgba(247, 244, 239, 0.9) 68%, var(--hh-paper) 100%),
 url("../images/hero/hero-marble-white-mobile.webp");
 }

 .hh-knowledge__topics,
 .hh-knowledge__articles {
 grid-template-columns: 1fr;
 }

 .hh-knowledge__search {
 max-width: none;
 }

 .hh-knowledge__actions .hh-btn {
 width: 100%;
 }
}

@media (prefers-reduced-motion: reduce) {
 .hh-knowledge__topic,
 .hh-knowledge__article,
 .hh-knowledge__topic-media img,
 .hh-knowledge__article-media img {
 transition: none;
 }

 .hh-knowledge__topic:hover,
 .hh-knowledge__topic:focus-visible,
 .hh-knowledge__article:hover,
 .hh-knowledge__article:focus-visible {
 transform: none;
 }

 .hh-knowledge__topic:hover .hh-knowledge__topic-media img,
 .hh-knowledge__topic:focus-visible .hh-knowledge__topic-media img,
 .hh-knowledge__article:hover .hh-knowledge__article-media img,
 .hh-knowledge__article:focus-visible .hh-knowledge__article-media img {
 transform: none;
 }
}

/* Article body helpers (single knowledge articles) */
.hh-knowledge--article .hh-art__hero-meta {
 display: flex;
 flex-wrap: wrap;
 gap: 0.75rem 1.25rem;
 margin: 1.1rem 0 0;
 color: var(--hh-muted);
 font-size: 0.92rem;
}

.hh-knowledge--article .hh-art__body {
 max-width: 42rem;
}

.hh-knowledge--article .hh-art__body p {
 margin: 0 0 1.1rem;
 color: var(--hh-ink-soft);
 line-height: 1.9;
 font-size: 1.02rem;
}

.hh-knowledge--article .hh-art__body a {
 color: var(--hh-ink);
 text-decoration-thickness: 1px;
 text-underline-offset: 0.18em;
}

.hh-knowledge--article .hh-art__check,
.hh-knowledge--article .hh-art__signals {
 margin: 0 0 1.25rem;
 padding: 0;
 list-style: none;
}

.hh-knowledge--article .hh-art__check li,
.hh-knowledge--article .hh-art__signals li {
 position: relative;
 margin: 0 0 0.85rem;
 padding-left: 1.15rem;
 color: var(--hh-ink-soft);
 line-height: 1.8;
}

.hh-knowledge--article .hh-art__check li::before,
.hh-knowledge--article .hh-art__signals li::before {
 content: "";
 position: absolute;
 left: 0;
 top: 0.7em;
 width: 0.4rem;
 height: 0.4rem;
 border-radius: 50%;
 background: var(--hh-orange);
}

.hh-knowledge--article .hh-art__callout {
 margin: 1.35rem 0;
 padding: 1.1rem 1.2rem;
 border-left: 3px solid var(--hh-orange);
 background: rgba(255, 255, 255, 0.72);
}

.hh-knowledge--article .hh-art__callout strong {
 display: block;
 margin-bottom: 0.45rem;
 color: var(--hh-ink);
 font-weight: 600;
}

.hh-knowledge--article .hh-art__callout p {
 margin: 0;
}

.hh-knowledge--article .hh-art__figure {
 margin: 0 0 1.5rem;
 max-width: 28rem;
}

.hh-knowledge--article .hh-art__figure img {
 display: block;
 width: 100%;
 height: auto;
 border-radius: 0.35rem;
}

.hh-knowledge--article .hh-art__figure figcaption {
 margin-top: 0.55rem;
 color: var(--hh-muted);
 font-size: 0.9rem;
 line-height: 1.6;
}

.hh-knowledge--article .hh-art__related {
 display: grid;
 gap: 0.85rem;
 margin: 0;
 padding: 0;
 list-style: none;
}

.hh-knowledge--article .hh-art__related-card {
 display: flex;
 align-items: center;
 justify-content: space-between;
 gap: 1rem;
 padding: 1rem 1.1rem;
 border: 1px solid var(--hh-line);
 border-radius: 0.85rem;
 background: rgba(255, 255, 255, 0.78);
 text-decoration: none;
 color: var(--hh-ink);
}

.hh-knowledge--article .hh-art__related-card span {
 display: flex;
 flex-direction: column;
 gap: 0.25rem;
}

.hh-knowledge--article .hh-art__related-card small {
 color: var(--hh-muted);
 font-size: 0.88rem;
}

.hh-knowledge--article .hh-art__related-card:hover,
.hh-knowledge--article .hh-art__related-card:focus-visible {
 border-color: var(--hh-orange);
 outline: none;
}

.hh-knowledge--article .hh-art__byline {
 max-width: 42rem;
 padding-top: 0.5rem;
 border-top: 1px solid var(--hh-line);
}

.hh-knowledge--article .hh-art__byline dl {
 display: grid;
 grid-template-columns: 7rem 1fr;
 gap: 0.35rem 0.85rem;
 margin: 0 0 1rem;
}

.hh-knowledge--article .hh-art__byline dt {
 color: var(--hh-muted);
}

.hh-knowledge--article .hh-art__byline dd {
 margin: 0;
 color: var(--hh-ink-soft);
}

.hh-knowledge--article .nobr {
 white-space: nowrap;
}

.hh-knowledge--article .cjk-headline {
 word-break: keep-all;
 line-break: strict;
}

.hh-knowledge__crumb {
 display: flex;
 flex-wrap: wrap;
 gap: 0.35rem 0.55rem;
 margin: 0 0 1.1rem;
 padding: 0;
 list-style: none;
 color: var(--hh-muted);
 font-size: 0.88rem;
}

.hh-knowledge__crumb li:not(:last-child)::after {
 content: "/";
 margin-left: 0.55rem;
 opacity: 0.55;
}

.hh-knowledge__crumb a {
 color: inherit;
 text-decoration: none;
}

.hh-knowledge__crumb a:hover,
.hh-knowledge__crumb a:focus-visible {
 color: var(--hh-orange);
}

/* Article SEO blocks: answer box, table, steps, timeline, sources */
.hh-knowledge--article .hh-art__h1 {
 max-width: none;
 font-size: clamp(1.6rem, 3.4vw, 2.7rem);
 line-height: 1.35;
 letter-spacing: 0.04em;
}

.hh-knowledge--article .hh-art__answer {
 max-width: 46rem;
 margin: 1.5rem 0 0;
 padding: 1.25rem 1.4rem;
 border: 1px solid var(--hh-line);
 border-left: 3px solid var(--hh-orange);
 border-radius: 0.6rem;
 background: rgba(255, 255, 255, 0.86);
}

.hh-knowledge--article .hh-art__answer-title {
 margin: 0 0 0.5rem;
 color: var(--hh-orange);
 font-size: 0.85rem;
 font-weight: 600;
 letter-spacing: 0.12em;
}

.hh-knowledge--article .hh-art__answer p:last-child {
 margin: 0;
 color: var(--hh-ink);
 font-size: 1.02rem;
 line-height: 1.9;
}

.hh-knowledge--article .hh-art__body h3 {
 margin: 1.6rem 0 0.5rem;
 font-family: var(--hh-serif);
 font-weight: 500;
 font-size: 1.15rem;
 line-height: 1.5;
 color: var(--hh-ink);
}

.hh-knowledge--article .hh-art__table-wrap {
 margin: 0 0 1.25rem;
 overflow-x: auto;
 -webkit-overflow-scrolling: touch;
}

.hh-knowledge--article .hh-art__table {
 width: 100%;
 min-width: 34rem;
 border-collapse: collapse;
 background: var(--hh-white);
 font-size: 0.95rem;
 line-height: 1.7;
}

.hh-knowledge--article .hh-art__table caption {
 caption-side: top;
 padding: 0 0 0.6rem;
 text-align: left;
 color: var(--hh-muted);
 font-size: 0.9rem;
}

.hh-knowledge--article .hh-art__table th,
.hh-knowledge--article .hh-art__table td {
 padding: 0.7rem 0.85rem;
 border: 1px solid var(--hh-line);
 text-align: left;
 vertical-align: top;
 color: var(--hh-ink-soft);
}

.hh-knowledge--article .hh-art__table thead th {
 background: rgba(196, 132, 84, 0.1);
 color: var(--hh-ink);
 font-weight: 600;
}

.hh-knowledge--article .hh-art__table tbody th {
 width: 6.5rem;
 color: var(--hh-ink);
 font-weight: 500;
}

.hh-knowledge--article .hh-art__steps {
 margin: 0 0 1.25rem;
 padding: 0;
 list-style: none;
 counter-reset: hh-step;
}

.hh-knowledge--article .hh-art__steps li {
 position: relative;
 margin: 0 0 0.95rem;
 padding-left: 2.4rem;
 color: var(--hh-ink-soft);
 line-height: 1.85;
 counter-increment: hh-step;
}

.hh-knowledge--article .hh-art__steps li::before {
 content: counter(hh-step);
 position: absolute;
 left: 0;
 top: 0.1rem;
 width: 1.65rem;
 height: 1.65rem;
 border-radius: 50%;
 background: var(--hh-orange);
 color: #fff;
 font-size: 0.85rem;
 font-weight: 600;
 line-height: 1.65rem;
 text-align: center;
}

.hh-knowledge--article .hh-art__steps strong,
.hh-knowledge--article .hh-art__check strong {
 color: var(--hh-ink);
}

.hh-knowledge--article .hh-art__timeline {
 margin: 0 0 1.25rem;
 padding: 0 0 0 1.1rem;
 list-style: none;
 border-left: 2px solid rgba(196, 132, 84, 0.35);
}

.hh-knowledge--article .hh-art__timeline li {
 position: relative;
 margin: 0 0 1.15rem;
 padding-left: 0.6rem;
}

.hh-knowledge--article .hh-art__timeline li::before {
 content: "";
 position: absolute;
 left: -1.55rem;
 top: 0.45rem;
 width: 0.75rem;
 height: 0.75rem;
 border-radius: 50%;
 background: var(--hh-orange);
 box-shadow: 0 0 0 3px var(--hh-paper, #faf7f2);
}

.hh-knowledge--article .hh-art__timeline strong {
 display: block;
 color: var(--hh-ink);
 font-weight: 600;
}

.hh-knowledge--article .hh-art__timeline span {
 display: block;
 color: var(--hh-ink-soft);
 line-height: 1.85;
}

.hh-knowledge--article .hh-art__signals--alert li::before {
 background: #b54a3a;
}

.hh-knowledge--article .hh-art__sources {
 margin: 0;
 padding-left: 1.1rem;
 color: var(--hh-ink-soft);
 font-size: 0.92rem;
 line-height: 1.8;
}

.hh-knowledge--article .hh-art__byline p {
 color: var(--hh-ink-soft);
 line-height: 1.85;
}

@media (max-width: 600px) {
 .hh-knowledge--article .hh-art__answer {
 padding: 1rem 1.05rem;
 }

 .hh-knowledge--article .hh-art__table {
 min-width: 0;
 background: transparent;
 }

 .hh-knowledge--article .hh-art__table thead {
 display: none;
 }

 .hh-knowledge--article .hh-art__table tbody,
 .hh-knowledge--article .hh-art__table tr,
 .hh-knowledge--article .hh-art__table th,
 .hh-knowledge--article .hh-art__table td {
 display: block;
 width: auto;
 }

 .hh-knowledge--article .hh-art__table tr {
 margin: 0 0 0.85rem;
 border: 1px solid var(--hh-line);
 border-radius: 0.6rem;
 overflow: hidden;
 background: var(--hh-white);
 }

 .hh-knowledge--article .hh-art__table th,
 .hh-knowledge--article .hh-art__table td {
 border: 0;
 }

 .hh-knowledge--article .hh-art__table tbody th {
 width: auto;
 background: rgba(196, 132, 84, 0.1);
 }

 .hh-knowledge--article .hh-art__table td::before {
 content: attr(data-label);
 display: block;
 color: var(--hh-muted);
 font-size: 0.82rem;
 }
}