/* =============================================================================
   Shared subpage styles — About, Patents, Contact, Insights index
   Uses canonical design system tokens from tokens.css.
   ============================================================================= */

/* -------- Card grids ------------------------------------------------------- */
.card-grid {
    display: grid;
    gap: var(--s-5);
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
}

.card {
    background: var(--surface-elevated);
    border: 1px solid var(--overlay-border-weak);
    border-radius: 12px;
    padding: var(--s-5);
    transition: border-color var(--duration-base) var(--ease-standard),
                transform var(--duration-base) var(--ease-standard);
}
.card:hover {
    border-color: var(--brand-blue-rule);
    transform: translateY(-2px);
}
.card__eyebrow {
    color: var(--brand-blue-light);
    font-size: var(--label-xs-size);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-weight: 600;
    margin-bottom: var(--s-2);
}
.card__title {
    font-size: var(--h4-size);
    font-weight: var(--h4-weight);
    color: var(--fg-1);
    margin: 0 0 var(--s-3);
    line-height: 1.3;
}
.card__body {
    color: var(--fg-3);
    font-size: 0.95rem;
    line-height: 1.6;
}
.card__meta {
    margin-top: var(--s-4);
    padding-top: var(--s-3);
    border-top: 1px solid var(--overlay-border-weak);
    color: var(--fg-5);
    font-size: 0.8rem;
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-3);
}

/* -------- About: Principal blocks ----------------------------------------- */
.principal {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: var(--s-7);
    align-items: start;
    margin-bottom: var(--s-9);
}
.principal--reverse { grid-template-columns: 1fr 320px; }
.principal--reverse .principal__media { order: 2; }

.principal__media {
    position: sticky;
    top: calc(var(--nav-h) + var(--s-5));
}
.principal__photo {
    width: 100%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    border-radius: 12px;
    border: 1px solid var(--overlay-border-weak);
}
.principal__name {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--fg-1);
    margin: 0 0 var(--s-2);
    letter-spacing: -0.01em;
}
.principal__role {
    color: var(--brand-blue-light);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
    margin-bottom: var(--s-4);
}
.principal__credentials {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-2);
    margin-bottom: var(--s-5);
    padding: 0;
    list-style: none;
}
.principal__credential {
    background: var(--overlay-weak);
    border: 1px solid var(--overlay-border-weak);
    padding: 4px var(--s-3);
    border-radius: 4px;
    font-size: 0.78rem;
    color: var(--fg-3);
    font-weight: 500;
}

@media (max-width: 768px) {
    .principal,
    .principal--reverse {
        grid-template-columns: 1fr;
        gap: var(--s-5);
    }
    .principal__media { position: static; max-width: 260px; }
    .principal--reverse .principal__media { order: 0; }
}

/* -------- Logo strip (About: Partners & Clients) -------------------------- */
.logo-strip {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--s-5);
    align-items: center;
    margin-top: var(--s-5);
}
.logo-strip__item {
    height: 110px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #ffffff;
    border: 1px solid var(--overlay-border-weak);
    border-radius: var(--radius-sm);
    color: var(--fg-on-light);
    font-size: 0.8rem;
    text-align: center;
    padding: var(--s-4);
    text-decoration: none;
    transition: transform var(--duration-fast) var(--ease-standard),
                box-shadow var(--duration-fast) var(--ease-standard);
}
.logo-strip__item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}
.logo-strip__item img {
    max-height: 70px;
    max-width: 100%;
    width: auto;
    object-fit: contain;
}

/* -------- Clean Water Help callout (About → Mission) ---------------------- */
.cwh-callout {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: var(--s-6);
    align-items: center;
    background: var(--surface-elevated);
    border: 1px solid var(--overlay-border-weak);
    border-left: 3px solid var(--brand-blue-light);
    border-radius: var(--radius-md);
    padding: var(--s-6);
    max-width: 940px;
}
.cwh-callout__logo {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--s-4);
    height: 140px;
}
.cwh-callout__logo img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    object-fit: contain;
}
.cwh-callout__body { max-width: 580px; }
.cwh-callout__body p:last-child { margin-bottom: 0; }
@media (max-width: 768px) {
    .cwh-callout {
        grid-template-columns: 1fr;
        padding: var(--s-4);
    }
    .cwh-callout__logo { height: 110px; }
}

/* -------- Section header (used inside subpage sections) ------------------- */
.section-eyebrow {
    color: var(--fg-4);
    font-size: var(--label-size);
    text-transform: var(--label-transform);
    letter-spacing: 0.12em;
    font-weight: var(--label-weight);
    margin-bottom: var(--s-3);
}
.section-title {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 700;
    color: var(--fg-1);
    margin: 0 0 var(--s-5);
    letter-spacing: -0.01em;
}
.section-lede {
    color: var(--fg-3);
    font-size: 1.05rem;
    max-width: 720px;
    margin-bottom: var(--s-6);
    line-height: 1.65;
}

/* -------- Stat band (About) ------------------------------------------------ */
.stat-band {
    border-top: 1px solid var(--overlay-border-weak);
    border-bottom: 1px solid var(--overlay-border-weak);
    background: var(--surface-elevated);
}
.stat-band__inner {
    max-width: var(--content-max);
    margin: 0 auto;
    padding: var(--s-5) var(--s-6);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--s-5);
}
.stat { text-align: center; }
.stat__num {
    display: block;
    color: var(--fg-1);
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}
.stat__label {
    display: block;
    color: var(--fg-4);
    font-size: var(--label-xs-size);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-top: 4px;
}

/* -------- Patent / Product card ------------------------------------------- */
.patent-card {
    background: var(--surface-elevated);
    border: 1px solid var(--overlay-border-weak);
    border-radius: 12px;
    padding: var(--s-6);
    margin-bottom: var(--s-4);
    transition: border-color var(--duration-base) var(--ease-standard);
}
.patent-card:hover { border-color: var(--brand-blue-rule); }
.patent-card__head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--s-3);
    margin-bottom: var(--s-3);
}
.patent-card__num {
    font-family: var(--font-mono);
    color: var(--brand-blue-light);
    font-size: 0.85rem;
}
.patent-card__num-link {
    color: inherit;
    text-decoration: underline;
    text-decoration-color: rgba(96, 165, 250, 0.4);
    text-underline-offset: 2px;
    transition: text-decoration-color var(--duration-fast) var(--ease-standard);
}
.patent-card__num-link:hover { text-decoration-color: var(--brand-blue-light); }

/* Inline "View →" link appended to each publication / presentation row. */
.pub-link {
    display: inline-block;
    margin-left: 0.5rem;
    color: var(--brand-blue-light);
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
    transition: color var(--duration-fast) var(--ease-standard);
}
.pub-link:hover { color: var(--fg-1); }
.patent-card__status {
    background: var(--brand-blue-tint);
    color: var(--fg-1);
    padding: 2px var(--s-3);
    border-radius: 4px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}
.patent-card__title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--fg-1);
    margin: 0 0 var(--s-3);
    line-height: 1.35;
}
.patent-card__body {
    color: var(--fg-3);
    font-size: 0.95rem;
    line-height: 1.65;
}
.patent-card__app {
    margin-top: var(--s-4);
    padding-top: var(--s-3);
    border-top: 1px solid var(--overlay-border-weak);
    color: var(--fg-4);
    font-size: 0.9rem;
}

/* Patent accordion (native <details>/<summary>) */
details.patent-card { padding: 0; }
.patent-card__summary {
    list-style: none;
    cursor: pointer;
    padding: var(--s-6);
}
.patent-card__summary::-webkit-details-marker { display: none; }
.patent-card__summary:focus-visible {
    outline: 2px solid var(--brand-blue-light);
    outline-offset: 2px;
    border-radius: 12px;
}
.patent-card__summary .patent-card__title { margin-bottom: 0; }
.patent-card__chevron {
    display: inline-block;
    margin-left: 0.5rem;
    color: var(--fg-5);
    font-weight: 400;
    transition: transform var(--duration-base) var(--ease-standard),
                color var(--duration-base) var(--ease-standard);
}
details.patent-card[open] .patent-card__chevron {
    transform: rotate(90deg);
    color: var(--brand-blue-light);
}
.patent-card__detail {
    padding: 0 var(--s-6) var(--s-6);
    border-top: 1px solid var(--overlay-border-weak);
}
.patent-card__detail > :first-child { margin-top: var(--s-5); }
.patent-card__insight {
    color: var(--fg-2);
    font-size: 0.98rem;
    line-height: 1.65;
    border-left: 3px solid var(--brand-blue-light);
    padding-left: var(--s-4);
    margin: 0 0 var(--s-4);
}

/* -------- Publication list ------------------------------------------------ */
.pub-list {
    list-style: none;
    padding: 0; margin: 0;
}
.pub-list li {
    padding: var(--s-4) 0;
    border-bottom: 1px solid var(--overlay-border-weak);
    color: var(--fg-3);
    font-size: 0.95rem;
    line-height: 1.6;
}
.pub-list li:last-child { border-bottom: none; }
.pub-list li strong { color: var(--fg-1); font-weight: 600; }
.pub-list li em { color: var(--fg-2); font-style: italic; }

.pub-author-head {
    color: var(--fg-1);
    font-size: 1.3rem;
    font-weight: 700;
    margin: var(--s-5) 0 var(--s-3);
    padding-bottom: var(--s-2);
    border-bottom: 2px solid var(--brand-blue-light);
    display: inline-block;
}
.pub-author-sub {
    color: var(--fg-4);
    font-size: 0.9rem;
    margin: 0 0 var(--s-3);
}

/* -------- Placeholder callout --------------------------------------------- */
.placeholder {
    background: rgba(234, 179, 8, 0.06);
    border: 1px dashed rgba(234, 179, 8, 0.4);
    border-radius: var(--radius-sm);
    padding: var(--s-4) var(--s-5);
    color: #fde68a;
    font-size: 0.9rem;
    line-height: 1.6;
    margin: var(--s-4) 0;
}
.placeholder strong { color: #fcd34d; }

/* ============================================================================
   Innovation page — Quick Navigation panel + redesigned patent cards
   ============================================================================ */
.innov-nav {
    border-bottom: 1px solid var(--overlay-border-weak);
    background: var(--surface-elevated);
}
.innov-nav__inner {
    max-width: var(--content-max);
    margin: 0 auto;
    padding: var(--s-6);
}
.innov-nav__title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--fg-1);
    letter-spacing: -0.01em;
    margin: 0 0 var(--s-5);
}
.innov-nav__groups { display: flex; flex-direction: column; gap: var(--s-5); }
.innov-nav__group { display: flex; flex-direction: column; gap: var(--s-3); }
.innov-nav__label {
    font-size: 1.02rem;
    font-weight: 600;
    color: var(--fg-2);
    letter-spacing: 0.01em;
}
.innov-nav__row { display: flex; flex-wrap: wrap; gap: var(--s-3); }

/* One pill style shared by Section links and Topic filters */
.nav-pill {
    display: inline-block;
    background: var(--overlay-medium);
    border: 1px solid var(--overlay-border-medium);
    color: var(--fg-2);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1;
    padding: 11px 20px;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: background var(--duration-fast) var(--ease-standard),
                border-color var(--duration-fast) var(--ease-standard),
                color var(--duration-fast) var(--ease-standard),
                transform var(--duration-fast) var(--ease-standard);
}
.nav-pill:hover {
    background: var(--overlay-strong);
    border-color: var(--brand-blue-rule);
    color: var(--fg-1);
    transform: translateY(-1px);
}
.nav-pill.active {
    background: var(--brand-blue);
    border-color: var(--brand-blue);
    color: #fff;
}

.filtered-out, .hidden-block { display: none !important; }

/* Patent grid (2-up) with preview image + always-visible related insights */
.patent-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--s-5);
}
.patent2 {
    display: flex;
    flex-direction: column;
    background: var(--surface-elevated);
    border: 1px solid var(--overlay-border-weak);
    border-radius: 14px;
    overflow: hidden;
    transition: border-color var(--duration-base) var(--ease-standard),
                transform var(--duration-base) var(--ease-standard);
}
.patent2:hover { border-color: var(--brand-blue-rule); transform: translateY(-2px); }
.patent2__media { position: relative; aspect-ratio: 16 / 10; background: #0b1220; }
.patent2__media img { width: 100%; height: 100%; object-fit: cover; display: block; }
.patent2__status {
    position: absolute; top: 12px; right: 12px;
    background: rgba(2,6,23,0.78);
    backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
    color: var(--fg-1);
    padding: 3px 10px; border-radius: 4px;
    font-size: 0.7rem; font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.06em;
}
.patent2__status--granted { color: #86efac; }
.patent2__body { display: flex; flex-direction: column; padding: var(--s-5); flex: 1; }
.patent2__num { font-family: var(--font-mono); color: var(--brand-blue-light); font-size: 0.78rem; margin-bottom: var(--s-2); }
.patent2__title { font-size: 1.18rem; font-weight: 700; color: var(--fg-1); line-height: 1.3; margin: 0 0 var(--s-3); }
.patent2__insight { color: var(--fg-3); font-size: 0.92rem; line-height: 1.6; margin: 0 0 var(--s-4); }
.patent2__related-label {
    display: block; color: var(--fg-5);
    font-size: 0.68rem; text-transform: uppercase; letter-spacing: 0.1em;
    font-weight: 600; margin-bottom: var(--s-2);
}
.patent2__chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: var(--s-4); }
.rel-chip {
    display: inline-block;
    background: var(--brand-blue-tint);
    border: 1px solid var(--brand-blue-rule);
    color: var(--brand-blue-light);
    font-size: 0.74rem; font-weight: 500;
    padding: 4px 10px; border-radius: var(--radius-pill);
    transition: background var(--duration-fast) var(--ease-standard), color var(--duration-fast) var(--ease-standard);
}
.rel-chip:hover { background: var(--brand-blue); color: #fff; }
.patent2__toggle {
    margin-top: auto;
    align-self: flex-start;
    background: none; border: none; cursor: pointer;
    color: var(--brand-blue-light); font-family: inherit;
    font-size: 0.85rem; font-weight: 600;
    padding: var(--s-2) 0 0;
    display: inline-flex; align-items: center; gap: 6px;
}
.patent2__toggle .chev { transition: transform var(--duration-base) var(--ease-standard); }
.patent2__toggle[aria-expanded="true"] .chev { transform: rotate(90deg); }
.patent2__detail { margin-top: var(--s-3); }
.patent2__text { color: var(--fg-3); font-size: 0.9rem; line-height: 1.65; margin: 0 0 var(--s-4); }
.patent2__links { color: var(--fg-4); font-size: 0.85rem; margin: var(--s-3) 0 0; }
.patent-figures { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--s-3); margin: var(--s-3) 0; }
.patent-figures--single { grid-template-columns: 1fr; max-width: 420px; }
.patent-figures figure { margin: 0; }
.patent-figures img {
    width: 100%; border-radius: 8px;
    background: #fff; padding: 8px; /* white charts read intentionally on the dark stage */
}
.patent-figures figcaption { color: var(--fg-5); font-size: 0.72rem; line-height: 1.4; margin-top: 4px; }

@media (max-width: 900px) {
    .patent-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .innov-nav__inner { padding: var(--s-5) var(--s-4); }
    .innov-nav__title { font-size: 1.35rem; }
}

/* -------- Document download link (About: résumé / CV) -------------------- */
.doc-link {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    margin-bottom: var(--s-5);
    padding: 10px 18px;
    background: var(--overlay-medium);
    border: 1px solid var(--overlay-border-medium);
    border-radius: var(--radius-pill);
    color: var(--fg-1);
    font-size: 0.9rem;
    font-weight: 600;
    transition: background var(--duration-fast) var(--ease-standard),
                border-color var(--duration-fast) var(--ease-standard),
                transform var(--duration-fast) var(--ease-standard);
}
.doc-link:hover {
    background: var(--overlay-strong);
    border-color: var(--brand-blue-rule);
    transform: translateY(-1px);
}
.doc-link__icon {
    color: var(--brand-blue-light);
    font-weight: 700;
}
.doc-link__meta { color: var(--fg-4); font-weight: 500; }

/* Responsive: patent figures + cards on phones */
@media (max-width: 560px) {
    .patent-figures { grid-template-columns: 1fr; }
    .patent2__media { aspect-ratio: 16 / 9; }
    .innov-nav__title { font-size: 1.25rem; }
    .nav-pill { font-size: 0.88rem; padding: 9px 15px; }
    .stat-band__inner { gap: var(--s-4); }
    .stat__num { font-size: 1.5rem; }
}

/* -------- Closing CTA band (About / Innovation) -------------------------- */
.closing-cta {
    border-top: 1px solid var(--overlay-border-weak);
    background: linear-gradient(180deg, var(--surface-base), var(--surface-elevated));
}
.closing-cta__inner {
    max-width: 760px;
    margin: 0 auto;
    padding: var(--s-8) var(--s-6);
    text-align: center;
}
.closing-cta__title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--fg-1);
    letter-spacing: -0.01em;
    margin: 0 0 var(--s-3);
}
.closing-cta__text {
    color: var(--fg-3);
    font-size: 1.05rem;
    line-height: 1.65;
    max-width: 560px;
    margin: 0 auto var(--s-5);
}

/* -------- Patent tagline (problem subtitle under title) ------------------- */
.patent2__tagline {
    color: var(--brand-blue-light);
    font-size: 0.98rem;
    font-weight: 600;
    line-height: 1.45;
    margin: 0 0 var(--s-4);
}
.patent2 { cursor: pointer; }
.patent2 a { cursor: pointer; }

/* -------- Commercial products: stacked single rows ----------------------- */
.product-list { display: flex; flex-direction: column; gap: var(--s-4); }
.product-row {
    display: grid;
    grid-template-columns: 220px 1fr auto;
    gap: var(--s-4) var(--s-5);
    align-items: center;
    background: var(--surface-elevated);
    border: 1px solid var(--overlay-border-weak);
    border-radius: 12px;
    padding: var(--s-5) var(--s-6);
    transition: border-color var(--duration-base) var(--ease-standard);
}
.product-row:hover { border-color: var(--brand-blue-rule); }
.product-row__name { font-size: 1.2rem; font-weight: 700; color: var(--fg-1); margin: 0 0 4px; }
.product-row__flag {
    display: block; font-size: 0.72rem; font-weight: 600;
    color: var(--fg-5); text-transform: uppercase; letter-spacing: 0.06em;
}
.product-row__desc { color: var(--fg-3); font-size: 0.95rem; line-height: 1.55; margin: 0; }
.product-row__link { color: var(--brand-blue-light); font-weight: 600; font-size: 0.9rem; white-space: nowrap; }
.product-row__link:hover { color: var(--fg-1); }
@media (max-width: 720px) {
    .product-row { grid-template-columns: 1fr; gap: var(--s-2); padding: var(--s-5); }
}

/* -------- "See the list" collapsibles (Publications / Media / Talks) ------ */
.see-list {
    margin: var(--s-2) 0 0;
}
.see-list-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--s-2);
    padding: 0.85rem 1.75rem;
    background: linear-gradient(135deg, var(--brand-blue), var(--brand-blue-deep));
    color: #fff;
    border: none;
    border-radius: var(--radius-pill);
    font-family: inherit;
    font-size: 0.98rem;
    font-weight: 600;
    box-shadow: var(--shadow-cta);
    transition: transform var(--duration-base) var(--ease-standard),
                box-shadow var(--duration-base) var(--ease-standard);
}
.see-list-btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-cta-hover); }
.see-list-btn .chev { transition: transform var(--duration-base) var(--ease-standard); }
.see-list-btn[aria-expanded="true"] .chev { transform: rotate(180deg); }
.collapsible { display: none; margin-top: var(--s-6); }
.collapsible.is-open { display: block; }

/* -------- Expert Witness section ----------------------------------------- */
.ew-spec {
    display: flex; flex-wrap: wrap; gap: var(--s-2);
    margin: 0 0 var(--s-6);
}
.ew-spec span {
    background: var(--brand-blue-tint);
    border: 1px solid var(--brand-blue-rule);
    color: var(--brand-blue-light);
    font-size: 0.8rem; font-weight: 600;
    padding: 5px 12px; border-radius: var(--radius-pill);
}

/* -------- About: principal lead/positioning line ------------------------- */
.principal__lead {
    color: var(--fg-2);
    font-size: 1.05rem;
    line-height: 1.6;
    margin: 0 0 var(--s-5);
    max-width: 640px;
}