/* Tutorial layouts extend the shared OnlyFlexer design system. */
.liveness-guide {
    color-scheme: dark;
}

.guide-skip-link {
    position: fixed;
    top: -100px;
    left: 1rem;
    z-index: 1100;
}

.guide-skip-link:focus {
    top: 1rem;
}

.liveness-guide :focus-visible {
    outline: 3px solid var(--of-primary);
    outline-offset: 5px;
}

.guide-hero {
    padding: 126px 0 64px;
    border-bottom: 1px solid var(--of-dark-border);
    background: radial-gradient(ellipse at 80% 50%, var(--of-primary-light), transparent 55%);
}

.guide-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    padding: 0;
    margin: 0 0 2.5rem;
    list-style: none;
    color: var(--of-text-secondary);
    font-size: 0.8125rem;
}

.guide-breadcrumb li + li::before {
    content: '/';
    margin-right: 0.6rem;
    color: var(--of-text-muted);
}

.guide-breadcrumb a,
.guide-text-link {
    color: var(--of-text-secondary);
    text-underline-offset: 4px;
}

.guide-breadcrumb a:hover,
.guide-text-link:hover {
    color: var(--of-primary);
}

.guide-eyebrow {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--of-primary);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 1.25rem;
}

.guide-hero h1 {
    max-width: 660px;
    margin-bottom: 1.5rem;
    font-size: clamp(2.7rem, 4.5vw, 4.5rem);
    letter-spacing: -0.045em;
    line-height: 1.08;
}

.guide-hero .hero-subtitle {
    max-width: 560px;
    font-size: 1.0625rem;
    line-height: 1.8;
}

.guide-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.5rem;
    color: var(--of-text-secondary);
    font-size: 0.8125rem;
    margin-top: 2rem;
}

.guide-meta i {
    margin-right: 0.4rem;
    color: var(--of-primary);
}

.guide-hero-preview {
    position: relative;
    width: 280px;
    margin: 0 auto;
}

.guide-hero-preview img {
    width: 100%;
    height: auto;
    display: block;
    border: 5px solid var(--of-dark-border);
    border-radius: 2rem;
    box-shadow: var(--of-shadow-lg);
}

.guide-preview-label {
    position: absolute;
    bottom: 1.5rem;
    left: -2rem;
    right: -2rem;
    display: flex;
    gap: 0.75rem;
    align-items: center;
    padding: 1rem 1.25rem;
    background: var(--of-dark-secondary);
    border: 1px solid var(--of-dark-border);
    border-radius: var(--of-radius-lg);
    box-shadow: var(--of-shadow-lg);
    font-size: 0.875rem;
}

.guide-preview-label i {
    font-size: 1.5rem;
    color: var(--of-primary);
}

.guide-preview-label small {
    display: block;
    color: var(--of-text-secondary);
    font-size: 0.75rem;
}

.guide-layout {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 64px;
    padding-top: 64px;
    padding-bottom: 80px;
}

.guide-sidebar-inner {
    position: sticky;
    top: 112px;
}

.guide-sidebar-title {
    color: var(--of-text-secondary);
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.13em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.guide-toc {
    display: grid;
    gap: 0.25rem;
    border-left: 1px solid var(--of-dark-border);
}

.guide-toc a {
    display: flex;
    align-items: baseline;
    gap: 0.75rem;
    padding: 0.55rem 0.75rem 0.55rem 1rem;
    margin-left: -1px;
    border-left: 2px solid transparent;
    color: var(--of-text-secondary);
    font-size: 0.8125rem;
    text-decoration: none;
    transition: color var(--of-transition-fast), border-color var(--of-transition-fast);
}

.guide-toc a span {
    font-family: var(--of-font-display);
    font-size: 0.75rem;
}

.guide-toc a:hover,
.guide-toc a[aria-current="location"] {
    color: var(--of-primary);
    border-left-color: var(--of-primary);
    background: var(--of-primary-light);
}

.guide-sidebar-help {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--of-dark-border);
    font-size: 0.8125rem;
    color: var(--of-text-secondary);
}

.guide-sidebar-help p {
    margin-bottom: 0.4rem;
}

.guide-sidebar-help a {
    color: var(--of-primary);
    text-underline-offset: 4px;
}

.guide-article {
    min-width: 0;
}

.guide-article section[id] {
    scroll-margin-top: 112px;
}

.guide-article h2 {
    font-size: clamp(1.65rem, 2.6vw, 2.1rem);
    letter-spacing: -0.025em;
}

.guide-article p,
.guide-article li {
    color: var(--of-text-secondary);
    font-size: 0.9375rem;
    line-height: 1.85;
}

.guide-article strong {
    color: var(--of-text-primary);
    font-weight: 600;
}

.guide-checklist {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem 2rem;
    list-style: none;
    padding: 1.5rem 0;
    margin-bottom: 0.5rem;
}

.guide-checklist li {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}

.guide-checklist i {
    color: var(--of-primary);
    margin-top: 0.1rem;
}

.guide-checklist strong {
    display: block;
    margin-bottom: 0.25rem;
}

.guide-note {
    padding: 1.1rem 1.25rem;
    margin: 1.5rem 0;
    background: var(--of-primary-light);
    border-left: 3px solid var(--of-primary);
    border-radius: 0 var(--of-radius-md) var(--of-radius-md) 0;
}

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

.guide-note p {
    font-size: 0.875rem;
}

.guide-demo-note {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    margin: 1.5rem 0 0;
}

.guide-demo-note i {
    color: var(--of-text-secondary);
    margin-top: 0.2rem;
}

.guide-demo-note p {
    font-size: 0.8125rem;
    line-height: 1.7;
    margin-bottom: 0;
}

.guide-step {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 224px;
    gap: 2rem;
    padding: 3.5rem 0;
    border-bottom: 1px solid var(--of-dark-border);
    align-items: start;
}

.guide-step:first-of-type {
    border-top: 1px solid var(--of-dark-border);
}

.guide-step-number {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--of-primary);
    font-family: var(--of-font-display);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.25rem;
}

.guide-step-number::before {
    content: '';
    width: 24px;
    height: 2px;
    background: var(--of-primary);
}

.guide-shot {
    margin: 0;
    text-align: center;
}

.guide-shot a {
    display: block;
    position: relative;
    border-radius: var(--of-radius-xl);
    overflow: hidden;
    border: 1px solid var(--of-dark-border);
    background: var(--of-dark-secondary);
    transition: border-color var(--of-transition-fast);
    cursor: zoom-in;
}

.guide-shot a:hover {
    border-color: var(--of-primary);
}

.guide-shot img {
    display: block;
    width: 100%;
    height: auto;
}

.guide-shot figcaption {
    margin-top: 0.875rem;
    color: var(--of-text-secondary);
    font-size: 0.6875rem;
    line-height: 1.6;
}

.guide-shot figcaption i {
    margin-right: 0.3rem;
    color: var(--of-primary);
}

.guide-extra {
    margin-top: 1.5rem;
}

.guide-extra summary {
    color: var(--of-primary);
    cursor: pointer;
    font-size: 0.8125rem;
    padding: 0.5rem 0;
}

.guide-extra .guide-shot {
    max-width: 224px;
    margin: 1rem auto;
}

.guide-status {
    display: flex;
    gap: 0.65rem;
    align-items: baseline;
    margin-top: 1.5rem;
    padding: 1rem;
    background: rgba(0, 214, 143, 0.08);
    border: 1px solid rgba(0, 214, 143, 0.25);
    border-radius: var(--of-radius-md);
    color: var(--of-success);
    font-size: 0.8125rem;
}

.guide-troubleshooting {
    padding-top: 3.5rem;
}

.guide-faq {
    margin-top: 1.5rem;
    border-top: 1px solid var(--of-dark-border);
}

.guide-faq details {
    border-bottom: 1px solid var(--of-dark-border);
}

.guide-faq summary {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 0;
    cursor: pointer;
    list-style: none;
    color: var(--of-text-primary);
    font-weight: 500;
    font-size: 0.9375rem;
}

.guide-faq summary::-webkit-details-marker {
    display: none;
}

.guide-faq summary::after {
    content: '+';
    color: var(--of-primary);
    font-size: 1.5rem;
    font-weight: 400;
}

.guide-faq details[open] summary::after {
    content: '−';
}

.guide-faq details[open] summary {
    color: var(--of-primary);
}

.guide-faq details > p {
    padding-right: 1.5rem;
    padding-bottom: 0.5rem;
}

.guide-faq .guide-shot {
    max-width: 224px;
    margin: 1rem auto 2rem;
}

.guide-end {
    padding: 2rem;
    margin-top: 3rem;
    border: 1px solid var(--of-dark-border);
    border-radius: var(--of-radius-lg);
    background: var(--of-dark-secondary);
}

.guide-end h2 {
    font-size: 1.5rem;
}

.guide-lightbox {
    max-width: min(94vw, 650px);
    max-height: 94dvh;
    padding: 3.5rem 1rem 1rem;
    color: var(--of-text-primary);
    background: var(--of-dark-secondary);
    border: 1px solid var(--of-dark-border);
    border-radius: var(--of-radius-lg);
}

.guide-lightbox::backdrop {
    background: rgba(0, 0, 0, 0.85);
}

.guide-lightbox img {
    display: block;
    width: auto;
    max-width: 100%;
    max-height: calc(94dvh - 5rem);
    margin: auto;
    object-fit: contain;
}

.guide-lightbox-close {
    position: absolute;
    top: 0.5rem;
    right: 0.75rem;
    border: 1px solid var(--of-dark-border);
    border-radius: var(--of-radius-md);
    background: var(--of-dark-tertiary);
    color: var(--of-text-primary);
    padding: 0.5rem 0.875rem;
    font-size: 0.8125rem;
}

html.guide-dialog-open {
    overflow: hidden;
}

@media (max-width: 1199.98px) {
    .guide-layout { gap: 32px; grid-template-columns: 200px minmax(0, 1fr); }
    .guide-step { grid-template-columns: minmax(0, 1fr) 200px; gap: 1.5rem; }
}

@media (max-width: 991.98px) {
    .guide-hero { padding-top: 112px; }
    .guide-hero .hero-subtitle { margin-left: 0; }
    .guide-hero-preview { width: 225px; }
    .guide-preview-label { left: -1rem; right: -1rem; padding: 0.875rem; }
    .guide-layout { grid-template-columns: minmax(0, 1fr); gap: 40px; padding-top: 40px; }
    .guide-sidebar-inner { position: static; }
    .guide-toc { grid-template-columns: 1fr 1fr 1fr; border: 0; gap: 0.5rem; }
    .guide-toc a { border-left: 2px solid var(--of-dark-border); padding: 0.5rem 0.75rem; }
    .guide-sidebar-help { display: none; }
    .guide-step { grid-template-columns: minmax(0, 1fr) 224px; gap: 2rem; }
}

@media (max-width: 767.98px) {
    .guide-hero { padding-bottom: 40px; }
    .guide-breadcrumb { margin-bottom: 2rem; }
    .guide-hero h1 { max-width: 500px; }
    .guide-hero-preview { margin-top: 2.5rem; width: 210px; }
    .guide-meta { gap: 0.75rem 1rem; font-size: 0.75rem; }
    .guide-checklist { gap: 1.25rem; }
    .guide-toc { grid-template-columns: 1fr 1fr; }
    .guide-toc a { font-size: 0.75rem; }
    .guide-step { grid-template-columns: minmax(0, 1fr); padding: 2.5rem 0; gap: 1.5rem; }
    .guide-shot { max-width: 280px; width: 100%; margin: 0 auto; }
    .guide-step-number { margin-bottom: 1rem; }
    .guide-troubleshooting { padding-top: 2.5rem; }
    .guide-end { padding: 1.5rem; }
}

@media (max-width: 575.98px) {
    .liveness-guide .container { padding-left: 20px; padding-right: 20px; }
    .guide-breadcrumb { font-size: 0.75rem; }
    .guide-checklist { grid-template-columns: minmax(0, 1fr); }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .liveness-guide *, .liveness-guide *::before, .liveness-guide *::after { transition: none !important; }
}