:root {
    --color-primary: #0D6E6E;
    --color-primary-light: #14919B;
    --color-primary-dark: #094949;
    --color-primary-glow: rgba(13, 110, 110, 0.12);
    --color-accent: #E85D4C;
    --color-bg: #FAFBFC;
    --color-surface: #FFFFFF;
    --color-surface-alt: #F4F7F9;
    --color-border: #E2E8F0;
    --color-text: #1A2B3C;
    --color-text-secondary: #5A6B7C;
    --color-text-muted: #8A9BAC;
    --font-display: 'Source Serif 4', Georgia, serif;
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --container-max: 1080px;
    --container-padding: clamp(1.25rem, 4vw, 3rem);
    --radius-sm: 8px;
    --radius-md: 12px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--color-primary);
}

.site-header {
    background: rgba(255, 255, 255, 0.94);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(16px);
}

.header-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    min-height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.logo img {
    height: 32px;
    width: auto;
    display: block;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.header-nav a {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
}

.header-nav a:hover {
    color: var(--color-primary);
}

.lang-switch-dropdown {
    position: relative;
    display: inline-block;
    margin-left: 0.25rem;
}

.lang-switch-dropdown > summary.lang-switch {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    min-width: 4.2rem;
    padding: 0.46rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    background: var(--color-surface);
    color: var(--color-text);
    font-size: 0.75rem;
    font-weight: 700;
    line-height: 1;
    white-space: nowrap;
    text-decoration: none;
    transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease, transform 0.2s ease;
    list-style: none;
    cursor: pointer;
}

.lang-switch-dropdown > summary.lang-switch::-webkit-details-marker {
    display: none;
}

.lang-switch-dropdown > summary.lang-switch:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-glow);
    transform: translateY(-1px);
}

.lang-switch-menu {
    position: absolute;
    top: calc(100% + 0.45rem);
    right: 0;
    display: none;
    min-width: 9rem;
    padding: 0.35rem;
    border: 1px solid var(--color-border);
    border-radius: 14px;
    background: var(--color-surface);
    box-shadow: 0 18px 30px rgba(26, 43, 60, 0.12);
    z-index: 20;
}

.lang-switch-dropdown[open] .lang-switch-menu {
    display: grid;
    gap: 0.2rem;
}

.lang-option {
    display: block;
    padding: 0.55rem 0.75rem;
    border-radius: 10px;
    color: var(--color-text);
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
}

.lang-option:hover {
    background: var(--color-surface-alt);
    color: var(--color-primary);
}

.lang-option[aria-current="page"] {
    background: var(--color-primary-glow);
    color: var(--color-primary);
}

.method-hero {
    padding: clamp(4rem, 8vw, 7rem) var(--container-padding) clamp(3rem, 6vw, 5rem);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.method-hero-inner {
    max-width: var(--container-max);
    margin: 0 auto;
}

h1,
h2,
h3 {
    line-height: 1.18;
}

h1 {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4.75rem);
    font-weight: 500;
    max-width: 860px;
    margin-bottom: 1.25rem;
}

.lead {
    max-width: 760px;
    color: var(--color-text-secondary);
    font-size: clamp(1.05rem, 2vw, 1.25rem);
}

.page-shell {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: clamp(3rem, 6vw, 5rem) var(--container-padding);
}

.index-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
    gap: 1.25rem;
}

.index-card {
    display: flex;
    flex-direction: column;
    min-height: 270px;
    padding: 1.5rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.index-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.index-card span {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    border-radius: var(--radius-sm);
    background: var(--color-primary-glow);
    color: var(--color-primary);
    font-size: 0.85rem;
    font-weight: 700;
}

.index-card h2 {
    color: var(--color-text);
    font-size: 1.12rem;
    margin-bottom: 0.75rem;
}

.index-card p {
    color: var(--color-text-secondary);
    font-size: 0.94rem;
    margin-bottom: 1.25rem;
}

.index-card strong {
    margin-top: auto;
    color: var(--color-primary);
    font-size: 0.9rem;
}

.article-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
}

.article {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: clamp(1.5rem, 4vw, 3rem);
}

.article section + section {
    margin-top: 2.5rem;
    padding-top: 2.5rem;
    border-top: 1px solid var(--color-border);
}

.article .risk-example + section {
    margin-top: clamp(4rem, 7vw, 5.5rem);
    padding-top: clamp(3rem, 5vw, 4rem);
    border-top: 1px solid var(--color-border);
}

.article h2 {
    font-size: 1.45rem;
    margin-bottom: 1rem;
}

.article h3 {
    font-size: 1.05rem;
    margin: 1.4rem 0 0.4rem;
}

.article p {
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
}

.article ul {
    padding-left: 1.2rem;
    color: var(--color-text-secondary);
}

.article li + li {
    margin-top: 0.6rem;
}

.side-panel {
    position: sticky;
    top: 96px;
    padding: 1.25rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.side-panel h2 {
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
}

.side-panel p {
    color: var(--color-text-secondary);
    font-size: 0.88rem;
    margin-bottom: 1rem;
}

.side-panel a {
    display: block;
    color: var(--color-primary);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
}

.side-panel a + a {
    margin-top: 0.65rem;
}

.callout {
    padding: 1rem 1.15rem;
    border-left: 4px solid var(--color-primary);
    background: var(--color-primary-glow);
    border-radius: var(--radius-sm);
}

.callout p:last-child {
    margin-bottom: 0;
}

.status-label {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.7rem;
    margin-bottom: 1rem;
    border-radius: 999px;
    background: var(--color-surface-alt);
    color: var(--color-primary-dark);
    font-size: 0.78rem;
    font-weight: 700;
}

.article-footer {
    margin-top: 2rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.button-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 0.78rem;
    border-radius: 999px;
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 0.79rem;
    font-weight: 600;
    text-decoration: none;
    background: transparent;
    white-space: nowrap;
}

.button-link.primary {
    background: var(--color-primary-glow);
    border-color: rgba(13, 110, 110, 0.16);
    color: var(--color-primary-dark);
}

.button-link:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: rgba(20, 145, 155, 0.06);
}

.button-link.primary:hover {
    border-color: rgba(13, 110, 110, 0.22);
    color: var(--color-primary-dark);
    background: rgba(13, 110, 110, 0.18);
}

.screening-demo-shell,
.search-demo-shell {
    padding-top: clamp(1.5rem, 3.5vw, 2.6rem);
    padding-bottom: 0;
}

.screening-demo-showcase,
.search-demo-showcase {
    display: grid;
    grid-template-columns: minmax(220px, 0.48fr) minmax(500px, 1.52fr);
    gap: clamp(1.25rem, 3vw, 2rem);
    align-items: center;
    padding: clamp(1.1rem, 3vw, 2rem);
    border: 1px solid rgba(13, 110, 110, 0.1);
    border-radius: 18px;
    background: #f8faf9;
    overflow: hidden;
}

.screening-demo-copy,
.search-demo-copy {
    min-width: 0;
}

.demo-kicker {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    padding: 0.28rem 0.7rem;
    margin-bottom: 0.82rem;
    border-radius: 999px;
    background: rgba(13, 110, 110, 0.08);
    color: var(--color-primary-dark);
    font-size: 0.74rem;
    font-weight: 700;
}

.screening-demo-copy h2,
.search-demo-copy h2 {
    max-width: 360px;
    font-size: clamp(1.55rem, 2.5vw, 2.1rem);
    line-height: 1.1;
    margin-bottom: 0.85rem;
}

.screening-demo-copy > p,
.search-demo-copy > p {
    max-width: 380px;
    color: var(--color-text-secondary);
    font-size: 0.92rem;
    line-height: 1.55;
    margin-bottom: 1rem;
}

.demo-note {
    max-width: 380px;
    padding: 0.85rem 0.95rem;
    border-left: 3px solid var(--color-primary);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.72);
}

.demo-note h3 {
    margin: 0 0 0.35rem;
    color: var(--color-text);
    font-size: 0.84rem;
}

.demo-note p {
    margin: 0;
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    line-height: 1.5;
}

.app-demo-frame {
    min-width: 0;
    margin: 0;
    border: 1px solid rgba(26, 43, 60, 0.1);
    border-radius: 18px;
    background: var(--color-surface);
    box-shadow: 0 24px 48px rgba(26, 43, 60, 0.12);
    overflow: hidden;
    transition: transform 0.24s ease, box-shadow 0.24s ease;
}

.app-demo-frame:hover {
    transform: translateY(-3px);
    box-shadow: 0 30px 56px rgba(26, 43, 60, 0.16);
}

.app-demo-topbar {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    min-height: 42px;
    padding: 0 1rem;
    border-bottom: 1px solid rgba(26, 43, 60, 0.08);
    background: rgba(255, 255, 255, 0.92);
    color: var(--color-text-secondary);
    font-size: 0.78rem;
    font-weight: 700;
}

.app-demo-dots {
    display: inline-flex;
    gap: 0.35rem;
}

.app-demo-dots span {
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: #d9e4e4;
}

.app-demo-screen {
    position: relative;
    background: #eef5f4;
    overflow: hidden;
}

.app-demo-screen::before,
.app-demo-screen::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    z-index: 2;
    height: 52px;
    pointer-events: none;
}

.app-demo-screen::before {
    top: 0;
    background: linear-gradient(to bottom, rgba(248, 250, 249, 0.92), rgba(248, 250, 249, 0));
}

.app-demo-screen::after {
    bottom: 0;
    background: linear-gradient(to top, rgba(248, 250, 249, 0.92), rgba(248, 250, 249, 0));
}

.app-demo-video {
    width: 100%;
    aspect-ratio: 960 / 656;
    display: block;
    object-fit: cover;
}

.app-demo-frame figcaption {
    padding: 0.78rem 1rem 0.9rem;
    color: var(--color-text-secondary);
    font-size: 0.86rem;
    font-weight: 600;
}

.app-demo-frame--flush {
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    overflow: visible;
}

.app-demo-frame--flush:hover {
    transform: none;
    box-shadow: none;
}

.app-demo-screen--flush {
    background: transparent;
    border-radius: 0;
    overflow: visible;
}

.app-demo-frame--teaser {
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    overflow: visible;
}

.app-demo-frame--teaser:hover {
    transform: none;
    box-shadow: none;
}

.app-demo-screen--teaser {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    overflow: visible;
}

.app-demo-screen--teaser::before,
.app-demo-screen--teaser::after {
    display: none;
}

.app-demo-screen--flush::before,
.app-demo-screen--flush::after {
    display: none;
}

.app-demo-video--wide {
    width: min(100%, 900px);
    aspect-ratio: 1912 / 832;
    object-fit: contain;
    border-radius: 12px;
    cursor: zoom-in;
}

.app-demo-video--wide:fullscreen {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 0;
    background: #f8faf9;
    cursor: default;
}

.demo-lightbox-trigger {
    position: absolute;
    inset: 0;
    z-index: 3;
    border: 0;
    padding: 0;
    background: transparent;
    cursor: zoom-in;
}

.demo-lightbox-trigger:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

html.demo-lightbox-open {
    overflow: hidden;
}

.demo-lightbox {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: grid;
    place-items: center;
    padding: clamp(1rem, 3vw, 2rem);
    background: rgba(8, 18, 18, 0.72);
    backdrop-filter: blur(10px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.18s ease, visibility 0.18s ease;
}

.demo-lightbox.is-open {
    opacity: 1;
    visibility: visible;
}

.demo-lightbox-backdrop {
    position: absolute;
    inset: 0;
}

.demo-lightbox-dialog {
    position: relative;
    z-index: 1;
    width: min(96vw, 1360px);
    max-height: 90vh;
}

.demo-lightbox-close {
    position: absolute;
    top: -0.7rem;
    right: -0.7rem;
    width: 2rem;
    height: 2rem;
    border: 0;
    border-radius: 999px;
    background: #fff;
    color: var(--color-text);
    box-shadow: 0 12px 30px rgba(26, 43, 60, 0.24);
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
}

.demo-lightbox-video {
    display: block;
    width: 100%;
    max-height: 86vh;
    aspect-ratio: 1912 / 832;
    object-fit: contain;
    background: #050a0a;
    border-radius: 18px;
    box-shadow: 0 30px 80px rgba(26, 43, 60, 0.26);
}

.design-demo-shell {
    padding-top: clamp(1.5rem, 3.5vw, 2.6rem);
    padding-bottom: 0;
}

.design-workflow-demo {
    display: grid;
    grid-template-columns: minmax(220px, 0.48fr) minmax(520px, 1.52fr);
    gap: clamp(1.25rem, 3vw, 2rem);
    align-items: center;
    padding: clamp(1.1rem, 3vw, 2rem);
    border: 1px solid rgba(13, 110, 110, 0.1);
    border-radius: 18px;
    background: #f8faf9;
    overflow: hidden;
}

.design-workflow-copy {
    min-width: 0;
}

.design-workflow-copy h2 {
    max-width: 360px;
    font-size: clamp(1.55rem, 2.5vw, 2.15rem);
    line-height: 1.1;
    margin-bottom: 0.85rem;
}

.design-workflow-copy > p {
    max-width: 390px;
    color: var(--color-text-secondary);
    font-size: 0.92rem;
    line-height: 1.55;
    margin-bottom: 1rem;
}

.workflow-steps {
    display: grid;
    gap: 0.5rem;
    max-width: 390px;
    padding: 0;
    list-style: none;
}

.workflow-steps li {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--color-text-secondary);
    font-size: 0.84rem;
    line-height: 1.35;
    font-weight: 600;
}

.workflow-steps span {
    width: 1.75rem;
    height: 1.75rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    border-radius: 999px;
    background: rgba(13, 110, 110, 0.1);
    color: var(--color-primary-dark);
    font-size: 0.7rem;
    font-weight: 800;
}

.design-demo-frame {
    min-width: 0;
    border: 1px solid rgba(26, 43, 60, 0.1);
    border-radius: 16px;
    background: var(--color-surface);
    box-shadow: 0 20px 40px rgba(26, 43, 60, 0.12);
    overflow: hidden;
}

.design-demo-topbar {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    min-height: 38px;
    padding: 0 0.9rem;
    border-bottom: 1px solid rgba(26, 43, 60, 0.08);
    background: rgba(255, 255, 255, 0.94);
    color: var(--color-text-secondary);
    font-size: 0.74rem;
    font-weight: 700;
}

.design-slide-stage {
    position: relative;
    aspect-ratio: 1360 / 592;
    background: #f3f8f7;
    overflow: hidden;
}

.design-slide {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 0;
    transform: scale(1.018) translateY(10px);
    animation: designSlide 16s infinite;
}

.design-slide--one {
    animation-delay: 0s;
}

.design-slide--two {
    animation-delay: 4s;
}

.design-slide--three {
    animation-delay: 8s;
}

.design-slide--four {
    animation-delay: 12s;
}

.design-demo-progress {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.38rem;
    padding: 0.72rem 0.9rem 0.85rem;
}

.design-demo-progress span {
    height: 4px;
    border-radius: 999px;
    background: rgba(13, 110, 110, 0.14);
    overflow: hidden;
}

.design-demo-progress span::before {
    content: "";
    display: block;
    width: 100%;
    height: 100%;
    border-radius: inherit;
    background: var(--color-primary);
    transform: scaleX(0);
    transform-origin: left;
    animation: designProgress 16s infinite;
}

.design-demo-progress span:nth-child(1)::before {
    animation-delay: 0s;
}

.design-demo-progress span:nth-child(2)::before {
    animation-delay: 4s;
}

.design-demo-progress span:nth-child(3)::before {
    animation-delay: 8s;
}

.design-demo-progress span:nth-child(4)::before {
    animation-delay: 12s;
}

.risk-example {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.35rem;
    align-items: start;
    margin: clamp(2.5rem, 4vw, 3.5rem) 0 0;
    padding: 1.6rem 1.75rem;
    border: 1px solid rgba(13, 110, 110, 0.08);
    border-radius: 20px;
    background: var(--color-surface-alt);
}

.risk-example-copy {
    min-width: 0;
    display: grid;
    gap: 0.95rem;
    align-content: start;
    max-width: 56ch;
}

.risk-example-copy .status-label {
    margin-bottom: 0;
}

.risk-example-copy h2 {
    max-width: 18ch;
    font-size: clamp(1.45rem, 2.2vw, 1.95rem);
    line-height: 1.14;
    margin-bottom: 0;
}

.risk-example-copy > p {
    max-width: 52ch;
    color: var(--color-text-secondary);
    font-size: 0.96rem;
    line-height: 1.72;
    margin-bottom: 0;
}

.risk-example-note {
    max-width: 50ch;
    padding-top: 0.95rem;
    border-top: 1px solid rgba(26, 43, 60, 0.08);
    font-size: 0.86rem;
}

.risk-example-figure {
    min-width: 0;
    margin: 0;
    max-width: 760px;
    padding: 1rem;
    border: 1px solid rgba(26, 43, 60, 0.08);
    border-radius: 18px;
    background: var(--color-surface);
    box-shadow: 0 10px 24px rgba(26, 43, 60, 0.08);
}

.risk-example-figure img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: 10px;
}

.risk-example-figure figcaption {
    padding: 0.72rem 0.15rem 0 0.15rem;
    color: var(--color-text-secondary);
    font-size: 0.8rem;
    line-height: 1.45;
}

.risk-example-figure figcaption a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
}

.risk-example-figure figcaption a:hover {
    color: var(--color-primary-dark);
}

@keyframes designSlide {
    0%,
    100% {
        opacity: 0;
        transform: scale(1.018) translateY(10px);
    }

    5%,
    24% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }

    29% {
        opacity: 0;
        transform: scale(0.995) translateY(-8px);
    }
}

@keyframes designProgress {
    0% {
        transform: scaleX(0);
    }

    24% {
        transform: scaleX(1);
    }

    25%,
    100% {
        transform: scaleX(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    .design-slide,
    .design-demo-progress span::before {
        animation: none;
    }

    .design-slide--one {
        opacity: 1;
        transform: none;
    }
}

@media (max-width: 1000px) {
    .screening-demo-showcase,
    .search-demo-showcase,
    .design-workflow-demo {
        grid-template-columns: 1fr;
    }
}

.site-footer {
    border-top: 1px solid var(--color-border);
    padding: 2rem var(--container-padding);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.site-footer-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
}

@media (max-width: 860px) {
    .header-inner {
        align-items: flex-start;
        flex-direction: column;
        padding-top: 1rem;
        padding-bottom: 1rem;
    }

    .header-nav {
        flex-wrap: wrap;
    }

    .article-layout {
        grid-template-columns: 1fr;
    }

    .side-panel {
        position: static;
    }

    .screening-demo-showcase,
    .search-demo-showcase {
        grid-template-columns: 1fr;
        padding: 1rem;
    }

    .risk-example {
        padding: 1.2rem;
    }

    .app-demo-video--wide {
        width: 100%;
    }

    .demo-lightbox-dialog {
        width: 100%;
    }
}