/* Zentero — product case study */

.zentero-case {
    --z-green: var(--accent-green);
    --z-green-bright: var(--accent-green-bright);
    --z-ink: #f5f3ec;
    --z-muted: #aaa79f;
    --z-panel: rgba(14, 18, 18, 0.86);
    --z-panel-strong: rgba(19, 25, 23, 0.96);
    --z-line: rgba(255, 255, 255, 0.12);
    --z-text-max: 800px;
    /* Sticky lokální navigace potřebuje, aby žádný nadřazený prvek
       nevytvářel vlastní ořezávací kontext. Vodorovné přetečení hlídá body. */
    overflow: visible;
}

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

.zentero-case :where(section[id]) {
    scroll-margin-top: 8.2rem;
}

.zentero-case :where(h1, h2, h3) {
    text-wrap: balance;
}

.zentero-case h1,
.zentero-case h2,
.zentero-case h3 {
    color: var(--z-ink);
}

.zentero-case h1 {
    margin: 0;
    font-family: 'Chillax', 'Helvetica Neue', sans-serif;
    font-size: clamp(4.4rem, 9vw, 8.6rem);
    font-weight: 620;
    line-height: 0.88;
    letter-spacing: -0.065em;
}

.zentero-case h2 {
    max-width: 1050px;
    margin: 0;
    font-family: 'Chillax', 'Helvetica Neue', sans-serif;
    font-size: clamp(2.25rem, 4.4vw, 4.35rem);
    font-weight: 540;
    line-height: 1.02;
    letter-spacing: -0.045em;
}

.zentero-case h3 {
    font-size: clamp(1.16rem, 1.8vw, 1.48rem);
    line-height: 1.24;
    letter-spacing: -0.02em;
}

.zentero-case p,
.zentero-case dd,
.zentero-case li {
    font-size: clamp(1rem, 1.25vw, 1.08rem);
    line-height: 1.65;
}

.zentero-case p {
    color: var(--z-muted);
}

.zentero-eyebrow,
.zentero-case .zentero-eyebrow {
    display: block;
    margin: 0;
    color: var(--z-green-bright);
    font-size: 0.7rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.zentero-section {
    position: relative;
    padding: clamp(5.2rem, 8.5vw, 7.5rem) 0;
    border-top: 1px solid var(--z-line);
}

.zentero-section__head {
    display: grid;
    gap: 1.65rem;
    max-width: 1050px;
    margin-bottom: clamp(3rem, 5vw, 5rem);
}

.zentero-section__head > p:not(.zentero-eyebrow),
.zentero-section__head > .zentero-prose {
    max-width: var(--z-text-max);
}

.zentero-prose {
    display: grid;
    gap: 1.15rem;
    max-width: var(--z-text-max);
}

.zentero-prose p {
    margin: 0;
}

.zentero-block-number {
    display: block;
    margin-bottom: 1rem;
    color: var(--z-green-bright);
    font-family: 'Inter Local', sans-serif;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.18em;
}

.zentero-card-number {
    position: absolute;
    top: 1.25rem;
    right: 1.3rem;
    color: var(--z-green);
    font-family: 'Chillax', sans-serif;
    font-size: clamp(1.3rem, 2vw, 1.75rem);
    font-weight: 600;
    line-height: 1;
    opacity: 0.25;
    transition: opacity 0.25s ease, transform 0.25s ease;
}

/* Hero */
.zentero-hero {
    min-height: min(980px, 100svh);
    padding: clamp(8.5rem, 13vw, 11.5rem) 0 clamp(5rem, 9vw, 8rem);
}

.zentero-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    z-index: -1;
    background:
        radial-gradient(circle at 78% 34%, rgba(0, 200, 83, 0.13), transparent 27%),
        linear-gradient(180deg, rgba(6, 14, 12, 0.25), transparent 70%);
    pointer-events: none;
}

.zentero-hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 6fr) minmax(420px, 6fr);
    align-items: center;
    gap: clamp(2.8rem, 5vw, 6rem);
}

.zentero-hero__copy {
    display: grid;
    gap: 1.25rem;
}

.zentero-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    align-items: center;
    margin-bottom: 0.7rem;
    color: #8f958f;
    font-size: 0.76rem;
}

.zentero-breadcrumb a {
    color: inherit;
    text-decoration: none;
}

.zentero-breadcrumb a:hover,
.zentero-breadcrumb a:focus-visible {
    color: var(--z-green-bright);
}

.zentero-meta {
    display: flex;
    gap: 0.65rem;
    color: #b4b7b0 !important;
    font-size: 0.78rem !important;
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.zentero-hero__claim {
    max-width: 720px;
    margin: 0.85rem 0 0;
    color: var(--z-ink) !important;
    font-family: 'Chillax', 'Helvetica Neue', sans-serif;
    font-size: clamp(1.35rem, 2.05vw, 1.95rem) !important;
    font-weight: 450;
    line-height: 1.38 !important;
}

.zentero-hero__copy > p:not(.zentero-eyebrow):not(.zentero-meta):not(.zentero-hero__claim) {
    max-width: 720px;
    margin: 0;
}

.zentero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 1rem;
}

.zentero-actions .btn {
    justify-content: center;
    min-height: 48px;
}

.zentero-browser-frame {
    overflow: hidden;
    margin: 0;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 18px;
    background: #0d1111;
    box-shadow: 0 28px 80px rgba(0, 0, 0, 0.45);
}

.zentero-hero__media {
    transform: perspective(1400px) rotateY(-3deg) rotateX(1deg);
    transform-origin: left center;
}

.zentero-browser-frame__bar {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    height: 42px;
    padding: 0 0.85rem;
    border-bottom: 1px solid var(--z-line);
    background: #101514;
}

.zentero-browser-frame__bar i {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.24);
}

.zentero-browser-frame__bar span {
    margin-left: auto;
    color: #777f7a;
    font-size: 0.64rem;
    letter-spacing: 0.04em;
}

.zentero-browser-frame img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 1289 / 894;
    object-fit: cover;
    object-position: top center;
}

.zentero-browser-frame figcaption {
    padding: 0.9rem 1.1rem 1rem;
    color: #939990;
    font-size: 0.75rem;
    line-height: 1.5;
}

.zentero-media-placeholder {
    min-height: 440px;
    padding: clamp(2rem, 5vw, 4rem);
    background:
        radial-gradient(circle at 80% 20%, rgba(0, 200, 83, 0.16), transparent 30%),
        #0c1210;
}

.zentero-media-placeholder > span {
    color: var(--z-green-bright);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.zentero-media-placeholder strong {
    display: block;
    max-width: 380px;
    margin: 1rem 0 2.4rem;
    font-family: 'Chillax', sans-serif;
    font-size: clamp(1.7rem, 4vw, 3rem);
    line-height: 1.08;
}

.zentero-media-placeholder i {
    display: block;
    height: 58px;
    margin-top: 0.7rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-left: 3px solid var(--z-green);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.035);
}

/* Local navigation */
.zentero-local-nav {
    position: sticky;
    top: 70px;
    z-index: 40;
    border-block: 1px solid var(--z-line);
    background: rgba(5, 8, 8, 0.86);
    backdrop-filter: blur(18px) saturate(1.15);
}

.zentero-local-nav__inner {
    display: flex;
    align-items: center;
    min-height: 54px;
    gap: 1.25rem;
}

.zentero-local-nav__label {
    flex: 0 0 auto;
    color: var(--z-green-bright);
    font-family: 'Chillax', sans-serif;
    font-size: 0.8rem;
    font-weight: 600;
}

.zentero-local-nav__links {
    display: flex;
    overflow-x: auto;
    scrollbar-width: none;
    gap: 1.1rem;
    margin-left: auto;
}

.zentero-local-nav__links::-webkit-scrollbar {
    display: none;
}

.zentero-local-nav a {
    flex: 0 0 auto;
    padding: 0.7rem 0;
    color: #a5aaa4;
    font-size: 0.72rem;
    font-weight: 600;
    text-decoration: none;
}

.zentero-local-nav a:hover,
.zentero-local-nav a:focus-visible {
    color: var(--z-green-bright);
}

/* Summary */
.zentero-summary__grid {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(350px, 5fr);
    gap: clamp(2.6rem, 6vw, 7rem);
    align-items: start;
}

.zentero-summary__facts {
    padding: clamp(1.5rem, 3vw, 2.2rem);
    border-top: 3px solid var(--z-green);
    background: var(--z-panel);
}

.zentero-summary__facts h3 {
    margin-bottom: 1rem;
}

.zentero-summary__facts dl {
    margin: 0;
}

.zentero-summary__facts dl > div {
    display: grid;
    gap: 0.35rem;
    padding: 1rem 0;
    border-top: 1px solid var(--z-line);
}

.zentero-summary__facts dt,
.zentero-decision__balance dt,
.zentero-layer dt {
    color: var(--z-green-bright);
    font-size: 0.67rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.zentero-summary__facts dd {
    margin: 0;
    color: var(--z-ink);
    font-size: 0.94rem;
}

.zentero-metrics {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: clamp(3.2rem, 6vw, 5.5rem);
    border-block: 1px solid var(--z-line);
}

.zentero-metrics article,
.zentero-proof-grid article,
.zentero-evidence__grid article {
    position: relative;
    overflow: hidden;
    padding: clamp(1.5rem, 2.6vw, 2.2rem);
    border-top: 3px solid transparent;
    border-right: 1px solid var(--z-line);
    background: rgba(255, 255, 255, 0.018);
    transition: border-color 0.25s ease, background 0.25s ease;
}

.zentero-metrics article:last-child {
    border-right: 0;
}

.zentero-metrics article:hover,
.zentero-proof-grid article:hover,
.zentero-evidence__grid article:hover {
    border-top-color: var(--z-green);
    background: rgba(0, 200, 83, 0.045);
}

.zentero-metrics article:hover .zentero-card-number,
.zentero-proof-grid article:hover .zentero-card-number,
.zentero-evidence__grid article:hover .zentero-card-number {
    opacity: 0.85;
    transform: translateY(-2px);
}

.zentero-metrics strong {
    display: block;
    margin-bottom: 0.3rem;
    color: var(--z-ink);
    font-family: 'Chillax', sans-serif;
    font-size: clamp(2.2rem, 4vw, 3.5rem);
    line-height: 1;
}

.zentero-metrics h3 {
    margin-bottom: 0.75rem;
    font-size: 1rem;
}

.zentero-metrics p {
    font-size: 0.87rem;
}

/* Problem */
.zentero-problem {
    background: linear-gradient(180deg, rgba(0, 200, 83, 0.025), transparent 60%);
}

.zentero-problem__grid {
    display: grid;
    grid-template-columns: minmax(0, 6fr) minmax(390px, 6fr);
    gap: clamp(3rem, 7vw, 8rem);
    align-items: center;
}

.zentero-comparison {
    position: relative;
    display: grid;
    gap: 0;
}

.zentero-comparison::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 2.5rem;
    right: 2.5rem;
    z-index: 0;
    height: 1px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.2), var(--z-green), rgba(255, 255, 255, 0.2));
}

.zentero-comparison article {
    position: relative;
    z-index: 1;
    margin-right: 28%;
    padding: 1.25rem 1.4rem;
    border: 1px solid var(--z-line);
    background: #0a0e0d;
}

.zentero-comparison article + article {
    margin-top: 1.1rem;
}

.zentero-comparison article:nth-child(2) {
    margin-right: 0;
    margin-left: 14%;
    border-color: rgba(0, 200, 83, 0.55);
    background: rgba(0, 200, 83, 0.07);
}

.zentero-comparison article:nth-child(3) {
    margin-right: 0;
    margin-left: 28%;
}

.zentero-comparison article > span {
    color: var(--z-green-bright);
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.16em;
}

.zentero-comparison h3 {
    margin: 0.3rem 0 0.65rem;
}

.zentero-comparison p {
    font-size: 0.82rem;
}

.zentero-comparison strong {
    color: #d8dbd5;
}

.zentero-quote {
    max-width: 1040px;
    margin: clamp(3.2rem, 7vw, 6rem) auto 0;
    padding: clamp(1.8rem, 4vw, 3rem) clamp(1.6rem, 4.5vw, 4.2rem);
    border: 0;
    border-left: 4px solid var(--z-green);
    background: rgba(0, 200, 83, 0.055);
}

.zentero-quote > span {
    display: block;
    margin-bottom: 0.8rem;
    color: var(--z-green-bright);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.zentero-quote p {
    margin: 0;
    color: var(--z-ink);
    font-family: 'Chillax', sans-serif;
    font-size: clamp(1.2rem, 2.25vw, 1.8rem);
    line-height: 1.45;
}

.zentero-quote--compact {
    max-width: 900px;
    text-align: center;
    border-left: 0;
    border-top: 3px solid var(--z-green);
}

/* Product scenarios */
.zentero-scenarios {
    display: grid;
    gap: clamp(4rem, 8vw, 7rem);
}

.zentero-scenario {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(440px, 7fr);
    align-items: center;
    gap: clamp(2.4rem, 6vw, 6.5rem);
}

.zentero-scenario.is-reverse .zentero-scenario__copy {
    order: 2;
}

.zentero-scenario.is-reverse .zentero-scenario__media {
    order: 1;
}

.zentero-scenario__copy h3 {
    margin-bottom: 1rem;
    font-size: clamp(1.6rem, 3vw, 2.65rem);
}

.zentero-scenario__copy > p {
    max-width: 650px;
}

.zentero-flow {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    margin: 1.5rem 0 0;
    padding: 0;
    list-style: none;
}

.zentero-flow li {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    color: #c7cbc5;
    font-size: 0.73rem;
    font-weight: 650;
}

.zentero-flow li span {
    padding: 0.45rem 0.65rem;
    border: 1px solid var(--z-line);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.03);
}

.zentero-flow li i {
    color: var(--z-green);
    font-style: normal;
}

.zentero-scenario-map {
    position: relative;
    min-height: 390px;
    padding: clamp(1.5rem, 4vw, 3rem);
    border: 1px solid var(--z-line);
    border-top: 3px solid var(--z-green);
    background:
        linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px),
        linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
        var(--z-panel);
    background-size: 32px 32px;
}

.zentero-scenario-map__label {
    display: block;
    margin-bottom: clamp(2rem, 6vw, 4.5rem);
    color: var(--z-green-bright);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

.zentero-scenario-map > div {
    display: grid;
    grid-template-columns: 42px 1fr;
    gap: 1rem;
    align-items: center;
    min-height: 64px;
    padding: 0.7rem 1rem;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-left: 3px solid rgba(0, 200, 83, 0.65);
    background: #0a0f0d;
}

.zentero-scenario-map > div + div {
    margin-top: 0.65rem;
}

.zentero-scenario-map small {
    color: var(--z-green);
    font-weight: 700;
}

.zentero-scenario-map strong {
    color: var(--z-ink);
    font-size: 0.9rem;
}

/* Decisions */
.zentero-decisions {
    background: rgba(255, 255, 255, 0.012);
}

.zentero-decision-list {
    border-top: 1px solid var(--z-line);
}

.zentero-decision {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(340px, 5fr);
    gap: clamp(2rem, 6vw, 6rem);
    padding: clamp(2.5rem, 5vw, 4.5rem) 0;
    border-bottom: 1px solid var(--z-line);
}

.zentero-decision__copy h3 {
    margin-bottom: 1rem;
    font-size: clamp(1.45rem, 2.6vw, 2.35rem);
}

.zentero-decision__copy p {
    max-width: 760px;
}

.zentero-decision__balance {
    display: grid;
    align-content: start;
    gap: 1px;
    margin: 0;
    background: var(--z-line);
}

.zentero-decision__balance > div {
    padding: 1.25rem 1.4rem;
    background: #0a0e0d;
}

.zentero-decision__balance dd {
    margin: 0.55rem 0 0;
    color: #d2d5cf;
    font-size: 0.9rem;
}

/* Architecture */
.zentero-diagrams {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.1rem;
    margin-bottom: clamp(3.5rem, 7vw, 6rem);
}

.zentero-diagram {
    margin: 0;
    padding: clamp(1rem, 2.5vw, 1.6rem);
    border: 1px solid var(--z-line);
    background: var(--z-panel);
}

.zentero-diagram svg {
    display: block;
    width: 100%;
    height: auto;
}

.zentero-diagram__lines path {
    fill: none;
    stroke: rgba(0, 200, 83, 0.7);
    stroke-width: 2;
}

.zentero-diagram__nodes rect {
    fill: #0d1311;
    stroke: rgba(255, 255, 255, 0.18);
    stroke-width: 1.5;
}

.zentero-diagram__nodes text {
    fill: #f1f3ed;
    font-family: 'Inter Local', sans-serif;
    font-size: 17px;
    font-weight: 600;
    text-anchor: middle;
}

.zentero-diagram figcaption {
    margin-top: 0.7rem;
    color: #929890;
    font-size: 0.74rem;
    line-height: 1.5;
}

.zentero-layer-list {
    border-top: 1px solid var(--z-line);
}

.zentero-layer {
    display: grid;
    grid-template-columns: 70px minmax(0, 7fr) minmax(320px, 5fr);
    gap: clamp(1rem, 3vw, 3rem);
    padding: clamp(2rem, 4vw, 3.4rem) 0;
    border-bottom: 1px solid var(--z-line);
}

.zentero-layer__copy h3 {
    margin-bottom: 0.9rem;
}

.zentero-layer__copy p {
    max-width: 760px;
}

.zentero-layer dl {
    display: grid;
    gap: 1rem;
    margin: 0;
}

.zentero-layer dl > div {
    padding-left: 1rem;
    border-left: 2px solid rgba(0, 200, 83, 0.45);
}

.zentero-layer dd {
    margin: 0.35rem 0 0;
    color: #c6cac3;
    font-size: 0.86rem;
}

.zentero-ai-flow,
.zentero-process-cycle {
    margin-top: clamp(3rem, 6vw, 5rem);
    padding: clamp(1.4rem, 3vw, 2.3rem);
    border-top: 3px solid var(--z-green);
    background: var(--z-panel);
}

.zentero-ai-flow h3,
.zentero-process-cycle h3 {
    margin-bottom: 1.2rem;
}

.zentero-flow--long li,
.zentero-flow--cycle li {
    flex: 1 1 auto;
}

.zentero-flow--long li span,
.zentero-flow--cycle li span {
    width: 100%;
    text-align: center;
}

.zentero-stack,
.zentero-tag-rows > div {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 1.5rem;
    align-items: start;
    padding: 1.1rem 0;
    border-bottom: 1px solid var(--z-line);
}

.zentero-stack > span,
.zentero-tag-rows > div > span {
    color: var(--z-green-bright);
    font-size: 0.67rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.zentero-stack p,
.zentero-tag-rows p {
    color: #d7d9d3;
    font-size: 0.9rem;
}

.zentero-stack i,
.zentero-tag-rows i {
    margin: 0 0.3rem;
    color: var(--z-green);
    font-style: normal;
}

/* Timeline */
.zentero-timeline {
    position: relative;
    max-width: 1040px;
    margin: 0 auto;
    padding: 0;
    list-style: none;
}

.zentero-timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 35px;
    width: 1px;
    background: linear-gradient(var(--z-green), rgba(0, 200, 83, 0.1));
}

.zentero-timeline li {
    position: relative;
    display: grid;
    grid-template-columns: 70px 1fr;
    gap: clamp(1.2rem, 4vw, 3rem);
    padding-bottom: clamp(2.5rem, 5vw, 4rem);
}

.zentero-timeline__index {
    position: relative;
    z-index: 1;
    display: grid;
    width: 70px;
    height: 70px;
    place-items: center;
    border: 1px solid rgba(0, 200, 83, 0.55);
    border-radius: 50%;
    background: #07100d;
    color: var(--z-green-bright);
    font-size: 0.72rem;
    font-weight: 700;
}

.zentero-timeline li > div {
    max-width: 760px;
    padding-top: 0.3rem;
}

.zentero-timeline__date {
    margin-bottom: 0.35rem;
    color: var(--z-green-bright) !important;
    font-size: 0.7rem !important;
    font-weight: 700;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.zentero-timeline h3 {
    margin-bottom: 0.75rem;
    font-size: clamp(1.35rem, 2.4vw, 2rem);
}

.zentero-timeline__question {
    margin-top: 1rem;
    padding: 0.8rem 1rem;
    border-left: 2px solid var(--z-green);
    color: #d4d8d1 !important;
    font-size: 0.9rem !important;
}

/* Validation */
.zentero-validation__grid {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(390px, 5fr);
    gap: clamp(2.5rem, 6vw, 6rem);
    align-items: start;
}

.zentero-validation__today > h3,
.zentero-validation__future > h3 {
    margin-bottom: 1.4rem;
}

.zentero-proof-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border: 1px solid var(--z-line);
}

.zentero-proof-grid article:nth-child(2n) {
    border-right: 0;
}

.zentero-proof-grid article:nth-child(n + 3) {
    border-top-color: var(--z-line);
}

.zentero-proof-grid h3,
.zentero-evidence__grid h3 {
    max-width: 86%;
    margin-bottom: 0.8rem;
    font-size: 1.05rem;
}

.zentero-proof-grid p,
.zentero-evidence__grid p {
    font-size: 0.86rem;
}

.zentero-validation__future {
    padding: clamp(1.5rem, 3vw, 2.2rem);
    border-top: 3px solid rgba(255, 255, 255, 0.28);
    background: rgba(255, 255, 255, 0.035);
}

.zentero-validation__future > p {
    font-size: 0.94rem;
}

.zentero-validation__future > h3:nth-of-type(2) {
    margin-top: 2rem;
}

.zentero-validation__future dl {
    margin: 0;
}

.zentero-validation__future dl > div {
    display: grid;
    grid-template-columns: minmax(120px, 0.55fr) 1fr;
    gap: 1rem;
    padding: 0.9rem 0;
    border-top: 1px solid var(--z-line);
}

.zentero-validation__future dt {
    color: #e2e4df;
    font-size: 0.78rem;
    font-weight: 700;
}

.zentero-validation__future dd {
    margin: 0;
    color: var(--z-muted);
    font-size: 0.78rem;
}

.zentero-section-conclusion {
    max-width: 900px;
    margin: clamp(3.2rem, 7vw, 6rem) auto 0;
    padding: clamp(1.6rem, 3vw, 2.4rem);
    border-top: 3px solid var(--z-green);
    background: rgba(0, 200, 83, 0.055);
    text-align: center;
}

.zentero-section-conclusion p {
    margin: 0;
    color: var(--z-ink);
    font-family: 'Chillax', sans-serif;
    font-size: clamp(1.15rem, 2vw, 1.55rem);
    line-height: 1.45;
}

/* Hindsight */
.zentero-hindsight {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.018), transparent);
}

.zentero-reflections {
    border-top: 1px solid var(--z-line);
}

.zentero-reflection {
    display: grid;
    grid-template-columns: minmax(230px, 0.8fr) minmax(0, 1.1fr) minmax(0, 1.1fr);
    gap: clamp(1.6rem, 4vw, 4rem);
    padding: clamp(2rem, 4vw, 3.5rem) 0;
    border-bottom: 1px solid var(--z-line);
}

.zentero-reflection__title h3 {
    font-size: clamp(1.2rem, 2vw, 1.7rem);
}

.zentero-reflection > div:not(.zentero-reflection__title) > span {
    display: block;
    margin-bottom: 0.55rem;
    color: var(--z-green-bright);
    font-size: 0.67rem;
    font-weight: 700;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.zentero-reflection p {
    font-size: 0.92rem;
}

/* Responsibilities */
.zentero-responsibilities {
    margin: 0;
    padding: 0;
    border-top: 1px solid var(--z-line);
    list-style: none;
}

.zentero-responsibilities li {
    display: grid;
    grid-template-columns: 55px minmax(220px, 0.9fr) minmax(0, 1.7fr) minmax(150px, 0.55fr);
    gap: clamp(1rem, 3vw, 2.6rem);
    align-items: center;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--z-line);
}

.zentero-responsibilities__number {
    color: var(--z-green-bright);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.13em;
}

.zentero-responsibilities h3 {
    font-size: 1rem;
}

.zentero-responsibilities__title > span {
    display: none;
}

.zentero-responsibilities p {
    font-size: 0.86rem;
}

.zentero-responsibilities__tag {
    justify-self: start;
    padding: 0.38rem 0.65rem;
    border: 1px solid rgba(0, 200, 83, 0.35);
    border-radius: 999px;
    color: #ccefd9;
    font-size: 0.67rem;
    line-height: 1.3;
}

/* Evidence */
.zentero-evidence__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border: 1px solid var(--z-line);
}

.zentero-evidence__grid article:nth-child(3n) {
    border-right: 0;
}

.zentero-evidence__grid article:nth-child(n + 4) {
    border-top-color: var(--z-line);
}

.zentero-tag-rows {
    margin-top: clamp(2rem, 4vw, 3rem);
    border-top: 1px solid var(--z-line);
}

/* CTA */
.zentero-next {
    padding: clamp(5rem, 10vw, 9rem) 0;
    border-top: 1px solid var(--z-line);
    background:
        radial-gradient(circle at 20% 25%, rgba(0, 200, 83, 0.16), transparent 30%),
        #07100d;
}

.zentero-next__cta {
    max-width: 980px;
}

.zentero-next__cta h2 {
    margin: 1.3rem 0 1.8rem;
}

.zentero-next__cta > p:not(.zentero-eyebrow) {
    max-width: 760px;
    margin-top: 0.75rem;
}

.zentero-next-case {
    display: grid;
    grid-template-columns: 150px minmax(0, 1fr) auto;
    gap: clamp(1.2rem, 4vw, 3.5rem);
    align-items: center;
    margin-top: clamp(4rem, 8vw, 7rem);
    padding: clamp(1.6rem, 3vw, 2.5rem) 0;
    border-block: 1px solid var(--z-line);
    color: var(--z-ink);
    text-decoration: none;
}

.zentero-next-case > span {
    color: var(--z-green-bright);
    font-size: 0.67rem;
    font-weight: 700;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.zentero-next-case h3 {
    margin-bottom: 0.45rem;
    font-size: clamp(1.4rem, 2.5vw, 2.2rem);
}

.zentero-next-case p {
    max-width: 700px;
    font-size: 0.86rem;
}

.zentero-next-case strong {
    color: var(--z-green-bright);
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.zentero-next-case:hover strong,
.zentero-next-case:focus-visible strong {
    color: var(--z-ink);
}

/* Focus and motion */
.zentero-case :where(a, button):focus-visible {
    outline: 3px solid var(--z-green-bright);
    outline-offset: 4px;
}

@media (max-width: 1100px) {
    .zentero-hero__grid,
    .zentero-summary__grid,
    .zentero-problem__grid,
    .zentero-validation__grid {
        grid-template-columns: 1fr;
    }

    .zentero-hero {
        min-height: auto;
    }

    .zentero-hero__media {
        max-width: 900px;
        transform: none;
    }

    .zentero-summary__facts {
        max-width: 720px;
    }

    .zentero-metrics {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .zentero-metrics article:nth-child(2) {
        border-right: 0;
    }

    .zentero-metrics article:nth-child(n + 3) {
        border-top-color: var(--z-line);
    }

    .zentero-problem__grid {
        gap: 3.5rem;
    }

    .zentero-comparison {
        max-width: 760px;
    }

    .zentero-scenario {
        grid-template-columns: minmax(0, 5fr) minmax(380px, 7fr);
        gap: 2rem;
    }

    .zentero-layer {
        grid-template-columns: 60px minmax(0, 1fr);
    }

    .zentero-layer dl {
        grid-column: 2;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .zentero-reflection {
        grid-template-columns: minmax(220px, 0.75fr) minmax(0, 1.25fr);
    }

    .zentero-reflection > div:last-child {
        grid-column: 2;
    }

    .zentero-responsibilities li {
        grid-template-columns: 45px minmax(200px, 0.8fr) minmax(0, 1.7fr);
    }

    .zentero-responsibilities__tag {
        display: none;
    }

    .zentero-responsibilities__title > span {
        display: inline-block;
        margin-top: 0.4rem;
        color: var(--z-green-bright);
        font-size: 0.66rem;
    }
}

@media (max-width: 820px) {
    .zentero-case :where(section[id]) {
        scroll-margin-top: 7rem;
    }

    .zentero-local-nav {
        top: 62px;
    }

    .zentero-local-nav__label {
        display: none;
    }

    .zentero-local-nav__links {
        margin-left: 0;
    }

    .zentero-scenario,
    .zentero-scenario.is-reverse {
        grid-template-columns: 1fr;
    }

    .zentero-scenario.is-reverse .zentero-scenario__copy,
    .zentero-scenario.is-reverse .zentero-scenario__media {
        order: initial;
    }

    .zentero-scenario__media {
        max-width: 720px;
    }

    .zentero-diagrams,
    .zentero-proof-grid {
        grid-template-columns: 1fr;
    }

    .zentero-proof-grid article {
        border-right: 0;
    }

    .zentero-proof-grid article + article {
        border-top-color: var(--z-line);
    }

    .zentero-decision {
        grid-template-columns: 1fr;
    }

    .zentero-reflection {
        grid-template-columns: 1fr;
        gap: 1.2rem;
    }

    .zentero-reflection > div:last-child {
        grid-column: auto;
    }

    .zentero-responsibilities li {
        grid-template-columns: 40px 1fr;
        align-items: start;
    }

    .zentero-responsibilities li > p {
        grid-column: 2;
    }

    .zentero-evidence__grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .zentero-evidence__grid article:nth-child(3n) {
        border-right: 1px solid var(--z-line);
    }

    .zentero-evidence__grid article:nth-child(2n) {
        border-right: 0;
    }

    .zentero-evidence__grid article:nth-child(n + 3) {
        border-top-color: var(--z-line);
    }

    .zentero-next-case {
        grid-template-columns: 1fr;
    }

    .zentero-next-case strong {
        justify-self: start;
    }
}

@media (max-width: 560px) {
    .zentero-case h1 {
        font-size: clamp(3rem, 15.5vw, 4.35rem);
        line-height: .92;
    }

    .zentero-case h2 {
        font-size: clamp(1.95rem, 9.2vw, 2.7rem);
        line-height: 1.04;
    }

    .zentero-hero {
        padding-top: 6.7rem;
    }

    .zentero-section {
        padding-block: 3.4rem;
    }

    .zentero-section__head {
        gap: 1.25rem;
        margin-bottom: 2.5rem;
    }

    .zentero-meta {
        flex-wrap: wrap;
    }

    .zentero-actions {
        display: grid;
    }

    .zentero-actions .btn {
        width: 100%;
        white-space: normal;
        text-align: center;
    }

    .zentero-browser-frame {
        border-radius: 12px;
    }

    .zentero-browser-frame__bar {
        height: 34px;
    }

    .zentero-browser-frame figcaption {
        font-size: 0.7rem;
    }

    .zentero-metrics,
    .zentero-evidence__grid {
        grid-template-columns: 1fr;
    }

    .zentero-metrics article,
    .zentero-evidence__grid article {
        border-right: 0 !important;
    }

    .zentero-metrics article + article,
    .zentero-evidence__grid article + article {
        border-top-color: var(--z-line);
    }

    .zentero-comparison article,
    .zentero-comparison article:nth-child(2),
    .zentero-comparison article:nth-child(3) {
        margin-right: 0;
        margin-left: 0;
    }

    .zentero-comparison::before {
        top: 2rem;
        bottom: 2rem;
        left: 1.25rem;
        right: auto;
        width: 1px;
        height: auto;
        background: linear-gradient(rgba(255, 255, 255, 0.2), var(--z-green), rgba(255, 255, 255, 0.2));
    }

    .zentero-comparison article {
        padding-left: 2.3rem;
    }

    .zentero-scenario-map {
        min-height: 330px;
    }

    .zentero-flow {
        display: grid;
    }

    .zentero-flow li {
        display: grid;
        grid-template-columns: 1fr;
        text-align: center;
    }

    .zentero-flow li i {
        transform: rotate(90deg);
    }

    .zentero-decision__balance {
        grid-template-columns: 1fr;
    }

    .zentero-layer {
        grid-template-columns: 1fr;
    }

    .zentero-layer .zentero-block-number,
    .zentero-layer dl {
        grid-column: auto;
    }

    .zentero-layer dl {
        grid-template-columns: 1fr;
    }

    .zentero-stack,
    .zentero-tag-rows > div {
        grid-template-columns: 1fr;
        gap: 0.6rem;
    }

    .zentero-timeline::before {
        left: 23px;
    }

    .zentero-timeline li {
        grid-template-columns: 46px 1fr;
        gap: 1rem;
    }

    .zentero-timeline__index {
        width: 46px;
        height: 46px;
        font-size: 0.62rem;
    }

    .zentero-validation__future dl > div {
        grid-template-columns: 1fr;
        gap: 0.25rem;
    }

    .zentero-quote {
        padding: 1.5rem 1.2rem;
    }

    .zentero-responsibilities li {
        grid-template-columns: 32px 1fr;
        gap: 0.8rem;
    }
}

/* ═══════════════════════════════════════════════════════════
   CASE STUDY ORIENTATION — AKTIVNÍ KAPITOLY A DALŠÍ PROJEKT
═══════════════════════════════════════════════════════════ */
.zentero-case > article {
    counter-reset: zentero-section;
}

.zentero-section {
    counter-increment: zentero-section;
}

.zentero-section::before {
    position: absolute;
    top: clamp(2rem, 4vw, 3.5rem);
    right: var(--pad);
    color: rgba(0, 200, 83, .075);
    content: counter(zentero-section, decimal-leading-zero);
    font-family: 'Chillax', sans-serif;
    font-size: clamp(4rem, 8vw, 7rem);
    font-weight: 650;
    line-height: 1;
    pointer-events: none;
}

.zentero-section__head {
    position: relative;
    z-index: 1;
}

.zentero-local-nav {
    overflow: visible;
}

.zentero-local-nav__progress {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    height: 2px;
    transform: scaleX(0);
    transform-origin: left;
    background: linear-gradient(90deg, var(--z-green-bright), #4defff);
    will-change: transform;
}

.zentero-local-nav a {
    position: relative;
}

.zentero-local-nav a::after {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    height: 2px;
    transform: scaleX(0);
    transform-origin: left;
    background: var(--z-green-bright);
    content: '';
    transition: transform .22s ease;
}

.zentero-local-nav a.is-current,
.zentero-local-nav a[aria-current='location'] {
    color: var(--z-ink);
}

.zentero-local-nav a.is-current::after,
.zentero-local-nav a[aria-current='location']::after {
    transform: scaleX(1);
}

.zentero-decision {
    position: relative;
    padding-inline: clamp(1.25rem, 3vw, 2.4rem);
    border: 1px solid var(--z-line);
    border-top: 3px solid rgba(0, 200, 83, .48);
    background:
        linear-gradient(135deg, rgba(0, 200, 83, .045), transparent 46%),
        rgba(8, 12, 10, .82);
}

.zentero-decision + .zentero-decision {
    margin-top: 1rem;
}

.zentero-decision__balance {
    border-radius: 12px;
    overflow: hidden;
}

.zentero-decision__balance > div:first-child {
    background:
        linear-gradient(135deg, rgba(0, 200, 83, .09), transparent 54%),
        #0a0e0d;
}

.zentero-decision__balance > div:last-child {
    background:
        linear-gradient(135deg, rgba(229, 180, 79, .075), transparent 54%),
        #0a0e0d;
}

.zentero-decision__balance > div:last-child dt {
    color: #e5b44f;
}

.zentero-next-case {
    grid-template-columns: minmax(190px, 230px) minmax(0, 1fr) auto;
    padding: 0;
    overflow: hidden;
    border: 1px solid var(--z-line);
    border-radius: 18px;
    background:
        linear-gradient(120deg, rgba(149, 22, 42, .09), transparent 35%),
        #080b0a;
}

.zentero-next-case__visual {
    display: grid;
    min-height: 12rem;
    align-content: end;
    padding: 1.35rem;
    border-right: 1px solid rgba(255, 255, 255, .1);
    background:
        radial-gradient(circle at 28% 25%, rgba(225, 38, 60, .28), transparent 34%),
        linear-gradient(145deg, rgba(123, 12, 30, .48), #090b0a 72%);
}

.zentero-next-case__visual small,
.zentero-next-case__visual i,
.zentero-next-case__eyebrow {
    color: rgba(244, 240, 231, .58);
    font-family: 'Inter Local', sans-serif;
    font-size: .58rem;
    font-style: normal;
    font-weight: 700;
    letter-spacing: .13em;
    text-transform: uppercase;
}

.zentero-next-case__visual b {
    margin: auto 0 .15rem;
    color: var(--z-ink);
    font-family: 'Chillax', sans-serif;
    font-size: clamp(2.6rem, 5vw, 4.5rem);
    line-height: .9;
    letter-spacing: -.06em;
}

.zentero-next-case__eyebrow {
    display: block;
    margin-bottom: .7rem;
    color: #ff7187;
}

.zentero-next-case > div {
    padding-block: 1.5rem;
}

.zentero-next-case > strong {
    max-width: 12rem;
    padding: 1.5rem 1.5rem 1.5rem 0;
    transition: color .2s ease, transform .2s ease;
}

.zentero-next-case:hover > strong,
.zentero-next-case:focus-visible > strong {
    transform: translateX(4px);
}

@media (max-width: 820px) {
    .zentero-section::before {
        top: 2rem;
        font-size: 4.4rem;
    }

    .zentero-next-case {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .zentero-next-case__visual {
        min-height: 10rem;
        border-right: 0;
        border-bottom: 1px solid rgba(255, 255, 255, .1);
    }

    .zentero-next-case > div,
    .zentero-next-case > strong {
        max-width: none;
        padding: 1.25rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .zentero-case *,
    .zentero-case *::before,
    .zentero-case *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }

    .zentero-hero__media {
        transform: none;
    }
}

/* ═══════════════════════════════════════════════════════════
   ZENTERO — EDITORIAL REWORK 08/2026
   Méně dekorací, nižší vizuální hlasitost a čitelnější rozhodnutí.
═══════════════════════════════════════════════════════════ */
.zentero-case {
    --z-muted: rgba(244, 240, 231, .68);
    --z-panel: #080c0a;
    --z-panel-strong: #0a0f0c;
    --z-line: rgba(244, 240, 231, .12);
    background: #030706;
}

.zentero-case h1 {
    max-width: 9ch;
    font-size: clamp(3.5rem, 7.4vw, 6.8rem);
    line-height: .92;
}

.zentero-case h2 {
    max-width: 18ch;
    font-size: clamp(2rem, 3.8vw, 3.55rem);
    line-height: 1.06;
}

.zentero-case h3 {
    font-size: clamp(1.08rem, 1.5vw, 1.32rem);
}

.zentero-case p,
.zentero-case dd,
.zentero-case li {
    font-size: clamp(.98rem, 1.1vw, 1.05rem);
    line-height: 1.72;
}

.zentero-section {
    padding: clamp(4rem, 6.8vw, 6rem) 0;
}

.zentero-section::before {
    display: none;
}

.zentero-section__head {
    gap: 1.25rem;
    max-width: 900px;
    margin-bottom: clamp(2.3rem, 4vw, 3.6rem);
}

.zentero-eyebrow,
.zentero-case .zentero-eyebrow {
    letter-spacing: .16em;
}

.zentero-hero {
    min-height: 0;
    padding-top: clamp(8.5rem, 12vw, 11rem);
    padding-bottom: clamp(4rem, 7vw, 6rem);
    background:
        radial-gradient(circle at 76% 24%, rgba(0, 200, 83, .09), transparent 28rem),
        #030706;
}

.zentero-hero::before {
    opacity: .3;
}

.zentero-hero__grid {
    grid-template-columns: minmax(0, .82fr) minmax(24rem, 1.18fr);
    gap: clamp(2.5rem, 6vw, 6rem);
}

.zentero-hero__claim {
    max-width: 27ch;
    font-size: clamp(1.35rem, 2vw, 1.85rem) !important;
    line-height: 1.28 !important;
}

.zentero-browser-frame {
    border-radius: 16px;
    background: #080c0a;
    box-shadow: 0 24px 64px rgba(0, 0, 0, .32);
}

.zentero-local-nav {
    border-color: var(--z-line);
    background: rgba(3, 7, 6, .92);
    backdrop-filter: blur(18px);
}

.zentero-local-nav__label {
    color: rgba(244, 240, 231, .5);
}

/* Jednotný povrch pro obsahové karty. Schémata zůstávají odlišná funkcí,
   ne barvou, stínem nebo nahodilým poloměrem. */
.zentero-case :where(
    .zentero-metrics,
    .zentero-problem__grid,
    .zentero-proof-grid,
    .zentero-evidence__grid,
    .zentero-comparison,
    .zentero-reflections,
    .zentero-validation__grid
) article,
.zentero-decision,
.zentero-layer,
.zentero-scenario,
.zentero-quote,
.zentero-hindsight,
.zentero-validation__today,
.zentero-validation__future {
    border: 1px solid var(--z-line) !important;
    border-radius: 14px !important;
    background: var(--z-panel) !important;
    box-shadow: none !important;
}

.zentero-decision {
    border-top: 1px solid var(--z-line) !important;
    border-left: 3px solid rgba(0, 200, 83, .72) !important;
}

.zentero-decision__balance {
    border: 1px solid var(--z-line);
    border-radius: 10px;
}

.zentero-decision__balance > div:first-child,
.zentero-decision__balance > div:last-child {
    background: #060a08;
}

.zentero-card-number,
.zentero-block-number,
.zentero-responsibilities__number,
.zentero-timeline__index {
    color: rgba(0, 240, 113, .78);
}

.zentero-diagram,
.zentero-scenario-map,
.zentero-architecture,
.zentero-process-cycle,
.zentero-ai-flow {
    border-color: var(--z-line) !important;
    border-radius: 16px !important;
    background: #060a08 !important;
    box-shadow: none !important;
}

.zentero-tag-rows > div,
.zentero-stack > div {
    border-color: var(--z-line) !important;
    background: transparent !important;
}

.zentero-next,
.zentero-section-conclusion {
    background: #050907;
}

.zentero-next-case {
    border-radius: 16px;
    background: #080c0a;
}

@media (max-width: 1020px) {
    .zentero-hero__grid {
        grid-template-columns: 1fr;
    }

    .zentero-hero__copy {
        max-width: 760px;
    }

    .zentero-hero__media {
        max-width: 860px;
    }
}

@media (max-width: 720px) {
    .zentero-case h1 {
        font-size: clamp(3.3rem, 18vw, 5.2rem);
    }

    .zentero-case h2 {
        max-width: none;
        font-size: clamp(1.9rem, 9vw, 2.75rem);
    }

    .zentero-section {
        padding: 4rem 0;
    }
}