@font-face {
    font-family: "Instrument Serif";
    src: url("fonts/instrument-serif-regular.ttf") format("truetype");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "Instrument Serif";
    src: url("fonts/instrument-serif-italic.ttf") format("truetype");
    font-weight: 400;
    font-style: italic;
    font-display: swap;
}

@font-face {
    font-family: "Cormorant Garamond";
    src: url("fonts/cormorant-garamond-latin.woff2") format("woff2");
    font-weight: 500 700;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "IBM Plex Sans";
    src: url("fonts/ibm-plex-sans-latin.woff2") format("woff2");
    font-weight: 400 700;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "IBM Plex Mono";
    src: url("fonts/ibm-plex-mono-regular-latin.woff2") format("woff2");
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "IBM Plex Mono";
    src: url("fonts/ibm-plex-mono-medium-latin.woff2") format("woff2");
    font-weight: 500;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: "IBM Plex Mono";
    src: url("fonts/ibm-plex-mono-semibold-latin.woff2") format("woff2");
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

:root {
    color-scheme: light;
    --paper: oklch(0.97 0.02 90);
    --paper-deep: oklch(0.952 0.024 90);
    --surface: oklch(0.982 0.014 90 / 0.97);
    --surface-strong: oklch(0.992 0.01 90 / 0.99);
    --surface-muted: oklch(0.94 0.022 95);
    --text: oklch(0.27 0.047 140);
    --text-strong: oklch(0.2 0.044 140);
    --text-muted: oklch(0.49 0.038 140);
    --brand-jade: oklch(0.46 0.115 145);
    --brand-jade-deep: oklch(0.38 0.1 145);
    --brand-gold: oklch(0.64 0.12 90);
    --brand-violet: oklch(0.56 0.075 315);
    --button-primary-surface: oklch(0.42 0.105 145);
    --button-primary-surface-hover: oklch(0.46 0.11 145);
    --button-primary-border: oklch(0.34 0.08 145);
    --button-primary-border-hover: oklch(0.56 0.1 105);
    --border-soft: oklch(0.86 0.03 95 / 0.96);
    --border-strong: oklch(0.72 0.04 105 / 0.9);
    --surface-tint: white;
    --surface-inner-highlight: oklch(1 0 0 / 0.68);
    --shadow-soft: oklch(0.25 0.02 140 / 0.08);
    --browser-theme-color: #eef1e7;
    --text-on-accent: white;
    --hero-scrim: oklch(0.09 0.02 145 / 0.88);
    --hero-scrim-middle: oklch(0.08 0.02 145 / 0.74);
    --hero-scrim-edge: oklch(0.08 0.02 145 / 0.18);
    --hero-scrim-bottom: oklch(0.07 0.02 145 / 0.58);
    --hero-scrim-mobile-edge: oklch(0.08 0.02 145 / 0.28);
    --hero-ghost-border: oklch(1 0 0 / 0.38);
    --hero-ghost-border-hover: oklch(1 0 0 / 0.62);
    --hero-ghost-surface: oklch(0.12 0.02 145 / 0.58);
    --hero-ghost-surface-hover: oklch(0.12 0.02 145 / 0.78);
    --hero-accent: oklch(0.84 0.1 90);
    --hero-copy: oklch(0.95 0.018 95);
    --hero-caption: oklch(0.92 0.018 95 / 0.84);
    --font-body: "IBM Plex Mono", ui-monospace, monospace;
    --font-display: "Instrument Serif", Georgia, serif;
    --font-mono: "IBM Plex Mono", ui-monospace, monospace;
    --site-frame-width: 1408px;
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
}

:root[data-theme="dark"] {
    color-scheme: dark;
    --paper: oklch(0.19 0.019 145);
    --paper-deep: oklch(0.15 0.018 145);
    --surface: oklch(0.205 0.019 145 / 0.97);
    --surface-strong: oklch(0.235 0.021 145 / 0.99);
    --surface-muted: oklch(0.255 0.023 145);
    --text: oklch(0.84 0.026 105);
    --text-strong: oklch(0.93 0.022 100);
    --text-muted: oklch(0.69 0.025 115);
    --brand-jade: oklch(0.72 0.1 153);
    --brand-jade-deep: oklch(0.79 0.09 153);
    --brand-gold: oklch(0.78 0.11 88);
    --brand-violet: oklch(0.72 0.09 315);
    --button-primary-surface: oklch(0.44 0.1 153);
    --button-primary-surface-hover: oklch(0.48 0.1 153);
    --button-primary-border: oklch(0.57 0.08 153);
    --button-primary-border-hover: oklch(0.7 0.09 105);
    --border-soft: oklch(0.39 0.035 145 / 0.86);
    --border-strong: oklch(0.52 0.045 145 / 0.9);
    --surface-tint: oklch(0.3 0.024 145);
    --surface-inner-highlight: oklch(0.48 0.036 145 / 0.22);
    --shadow-soft: oklch(0.04 0.01 145 / 0.38);
    --browser-theme-color: #141a14;
    --hero-scrim: oklch(0.075 0.018 145 / 0.9);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme]) {
        color-scheme: dark;
        --paper: oklch(0.19 0.019 145);
        --paper-deep: oklch(0.15 0.018 145);
        --surface: oklch(0.205 0.019 145 / 0.97);
        --surface-strong: oklch(0.235 0.021 145 / 0.99);
        --surface-muted: oklch(0.255 0.023 145);
        --text: oklch(0.84 0.026 105);
        --text-strong: oklch(0.93 0.022 100);
        --text-muted: oklch(0.69 0.025 115);
        --brand-jade: oklch(0.72 0.1 153);
        --brand-jade-deep: oklch(0.79 0.09 153);
        --brand-gold: oklch(0.78 0.11 88);
        --brand-violet: oklch(0.72 0.09 315);
        --button-primary-surface: oklch(0.44 0.1 153);
        --button-primary-surface-hover: oklch(0.48 0.1 153);
        --button-primary-border: oklch(0.57 0.08 153);
        --button-primary-border-hover: oklch(0.7 0.09 105);
        --border-soft: oklch(0.39 0.035 145 / 0.86);
        --border-strong: oklch(0.52 0.045 145 / 0.9);
        --surface-tint: oklch(0.3 0.024 145);
        --surface-inner-highlight: oklch(0.48 0.036 145 / 0.22);
        --shadow-soft: oklch(0.04 0.01 145 / 0.38);
        --browser-theme-color: #141a14;
        --hero-scrim: oklch(0.075 0.018 145 / 0.9);
    }
}

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

html {
    min-height: 100%;
    scroll-behavior: smooth;
    background: linear-gradient(180deg, var(--paper) 0%, var(--paper-deep) 100%);
}

body {
    margin: 0;
    min-width: 320px;
    min-height: 100vh;
    overflow-x: hidden;
    color: var(--text);
    font-family: var(--font-body);
    font-size: 0.9rem;
    line-height: 1.7;
    background-image:
        linear-gradient(color-mix(in oklch, var(--brand-gold) 3%, transparent) 1px, transparent 1px),
        linear-gradient(90deg, color-mix(in oklch, var(--brand-jade) 2%, transparent) 1px, transparent 1px);
    background-size: 48px 48px;
}

img,
video {
    display: block;
    max-width: 100%;
}

a {
    color: inherit;
}

[hidden] {
    display: none !important;
}

:focus-visible {
    outline: 2px solid var(--brand-jade);
    outline-offset: 3px;
}

#intro,
.showcase-chapter,
.theme-library,
.capability-index {
    scroll-margin-top: 6.5rem;
}

.surface-card {
    border: 1px solid var(--border-soft);
    background: color-mix(in oklch, var(--surface) 96%, var(--surface-tint) 4%);
    box-shadow: inset 0 1px 0 var(--surface-inner-highlight), 0 8px 18px var(--shadow-soft);
}

.eyebrow {
    margin: 0 0 0.65rem;
    color: var(--brand-jade-deep);
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    line-height: 1.4;
    text-transform: uppercase;
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: 2.6rem;
    padding: 0.68rem 1rem;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-md);
    color: var(--text-strong);
    background: color-mix(in oklch, var(--surface) 92%, var(--surface-tint) 8%);
    font-size: 0.82rem;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
    text-decoration: none;
    transition: background-color 160ms ease, border-color 160ms ease, box-shadow 160ms ease, color 160ms ease;
}

.button:hover {
    border-color: color-mix(in oklch, var(--brand-violet) 32%, var(--border-soft));
    background: color-mix(in oklch, var(--surface-strong) 90%, var(--brand-violet) 10%);
    box-shadow: 0 8px 18px var(--shadow-soft);
}

.button--compact {
    min-height: 2.3rem;
    padding: 0.58rem 0.9rem;
}

.button--primary {
    color: var(--text-on-accent);
    border-color: var(--button-primary-border);
    background: var(--button-primary-surface);
    box-shadow: 0 8px 16px color-mix(in oklch, var(--button-primary-surface) 16%, transparent);
}

.button--primary:hover {
    color: var(--text-on-accent);
    border-color: var(--button-primary-border-hover);
    background: var(--button-primary-surface-hover);
}

.button--ghost {
    color: var(--text-strong);
}

.button--hero-ghost {
    color: var(--text-on-accent);
    border-color: var(--hero-ghost-border);
    background: var(--hero-ghost-surface);
    backdrop-filter: blur(12px);
}

.button--hero-ghost:hover {
    color: var(--text-on-accent);
    border-color: var(--hero-ghost-border-hover);
    background: var(--hero-ghost-surface-hover);
}

.landing-grid,
.auth-page {
    width: min(var(--site-frame-width), calc(100% - 2rem));
    margin: 1rem auto 0;
}

.landing-grid {
    display: grid;
    grid-template-columns: 14rem minmax(0, 1fr);
    grid-template-areas:
        "rail hero"
        "rail body";
    gap: 1rem;
    align-items: start;
}

.product-hero {
    position: relative;
    isolation: isolate;
    grid-area: hero;
    min-height: 540px;
    height: min(620px, calc(100svh - 8.5rem));
    overflow: hidden;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    background: var(--paper-deep);
    box-shadow: 0 14px 34px var(--shadow-soft);
}

.product-hero::after {
    position: absolute;
    z-index: -1;
    inset: 0;
    content: "";
    background:
        linear-gradient(90deg, var(--hero-scrim) 0%, var(--hero-scrim-middle) 42%, var(--hero-scrim-edge) 76%),
        linear-gradient(0deg, var(--hero-scrim-bottom) 0%, transparent 38%);
}

.product-hero__image {
    position: absolute;
    z-index: -2;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    background: var(--paper-deep);
}

.product-hero__copy {
    position: absolute;
    left: 2.3rem;
    bottom: 2.35rem;
    width: min(32rem, calc(100% - 4.6rem));
    color: var(--text-on-accent);
}

.eyebrow--hero {
    color: var(--hero-accent);
}

.product-hero h1 {
    margin: 0;
    color: var(--text-on-accent);
    font-family: var(--font-display);
    font-size: 5.4rem;
    font-weight: 400;
    letter-spacing: 0;
    line-height: 0.9;
}

.product-hero__lede {
    max-width: 31rem;
    margin: 1rem 0 0;
    color: var(--hero-copy);
    font-size: 1rem;
    line-height: 1.65;
    text-wrap: balance;
}

.button-row--hero {
    margin-top: 1.25rem;
}

.product-hero__caption {
    position: absolute;
    right: 1.15rem;
    bottom: 1rem;
    width: min(18rem, 31%);
    margin: 0;
    color: var(--hero-caption);
    font-size: 0.67rem;
    line-height: 1.55;
    text-align: right;
}

.page-rail {
    position: sticky;
    top: 5.65rem;
    grid-area: rail;
    padding: 0.95rem;
    border-radius: var(--radius-lg);
}

.page-rail__block + .page-rail__block {
    margin-top: 1rem;
    padding-top: 0.9rem;
    border-top: 1px solid var(--border-soft);
}

.page-rail__eyebrow {
    margin: 0 0 0.65rem;
    color: var(--text-strong);
    font-size: 0.69rem;
    font-weight: 600;
    letter-spacing: 0.16em;
    line-height: 1.4;
    text-transform: uppercase;
}

.page-rail__nav {
    display: grid;
    gap: 0.2rem;
}

.page-rail__nav a {
    padding: 0.38rem 0.45rem;
    border-left: 2px solid transparent;
    color: var(--text-muted);
    font-size: 0.76rem;
    line-height: 1.45;
    text-decoration: none;
    transition: background-color 150ms ease, border-color 150ms ease, color 150ms ease;
}

.page-rail__nav a:hover,
.page-rail__nav a:focus-visible {
    border-left-color: var(--brand-jade);
    color: var(--text-strong);
    background: color-mix(in oklch, var(--surface-muted) 72%, transparent);
}

.page-rail__note {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.74rem;
    line-height: 1.6;
}

.page-content {
    min-width: 0;
    grid-area: body;
}

.trust-strip {
    display: grid;
    grid-template-columns: minmax(11rem, 0.7fr) minmax(0, 2.3fr);
    gap: 1.6rem;
    align-items: center;
    padding: 1.2rem 0;
    border-top: 1px solid var(--border-soft);
    border-bottom: 1px solid var(--border-soft);
}

.trust-strip__intro > p:last-child {
    margin: 0;
    color: var(--text-strong);
    font-family: var(--font-display);
    font-size: 1.35rem;
    line-height: 1.1;
}

.trust-strip__list {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    margin: 0;
    padding: 0;
    list-style: none;
}

.trust-strip__list li {
    min-width: 0;
    padding: 0.15rem 0.8rem;
    border-left: 1px solid var(--border-soft);
    color: var(--text-strong);
    font-size: 0.73rem;
    font-weight: 600;
    line-height: 1.35;
}

.trust-strip__list span {
    display: block;
    margin-top: 0.25rem;
    color: var(--text-muted);
    font-size: 0.62rem;
    font-weight: 400;
    line-height: 1.45;
}

.chapter-list {
    display: grid;
}

.showcase-chapter {
    display: grid;
    grid-template-columns: minmax(15rem, 0.72fr) minmax(0, 1.28fr);
    gap: 1.8rem 2.6rem;
    align-items: start;
    padding: 4.25rem 0;
    border-bottom: 1px solid var(--border-soft);
}

.showcase-chapter--visual {
    grid-template-areas:
        "copy highlights"
        "media media";
}

.showcase-chapter--text {
    grid-template-areas: "copy highlights";
}

.showcase-chapter__copy {
    grid-area: copy;
    max-width: 38rem;
}

.showcase-chapter__copy h2,
.theme-library__heading h2,
.section-heading h2,
.closing-cta h2,
.auth-card h1 {
    margin: 0;
    color: var(--text-strong);
    font-family: var(--font-display);
    font-size: 2.65rem;
    font-weight: 400;
    letter-spacing: 0;
    line-height: 0.98;
    text-wrap: balance;
}

.showcase-chapter__description {
    margin: 1rem 0 0;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.75;
}

.showcase-chapter__highlights {
    grid-area: highlights;
    display: grid;
    gap: 0;
    align-self: start;
    margin: 0;
    padding: 0;
    color: var(--text);
    font-size: 0.78rem;
    line-height: 1.65;
    list-style: none;
}

.showcase-chapter__highlights li {
    position: relative;
    padding: 0.75rem 0 0.75rem 1rem;
    border-top: 1px solid var(--border-soft);
}

.showcase-chapter__highlights li::before {
    position: absolute;
    top: 1.38rem;
    left: 0;
    width: 0.5rem;
    height: 1px;
    content: "";
    background: var(--brand-jade);
}

.product-frame {
    grid-area: media;
    min-width: 0;
    margin: 0;
}

.product-frame__image {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    object-fit: cover;
    object-position: center;
    background: var(--paper-deep);
    box-shadow: 0 12px 28px var(--shadow-soft);
}

.product-frame--pull-request-conversation .product-frame__image {
    object-position: 52% center;
}

.product-frame--commit-diff .product-frame__image {
    object-position: 58% center;
}

.product-frame figcaption {
    margin-top: 0.65rem;
    color: var(--text-muted);
    font-size: 0.67rem;
    line-height: 1.55;
}

.capability-index {
    padding: 4.8rem 0 1.5rem;
}

.section-heading {
    max-width: 46rem;
}

.section-heading h2 {
    font-size: 3.15rem;
}

.section-heading > p:last-child,
.theme-library__heading > p:last-child,
.closing-cta > div > p:last-child,
.auth-card p {
    margin: 1rem 0 0;
    color: var(--text-muted);
    line-height: 1.75;
}

.theme-library {
    display: grid;
    grid-template-columns: minmax(15rem, 0.72fr) minmax(0, 1.28fr);
    gap: 2.6rem;
    align-items: start;
    padding: 4.25rem 0;
    border-bottom: 1px solid var(--border-soft);
}

.theme-library__heading {
    max-width: 38rem;
}

.theme-library__list {
    border-top: 2px solid var(--brand-jade);
}

.theme-library__index {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0;
    margin: 0;
    padding: 0;
    list-style: none;
    border-bottom: 1px solid var(--border-soft);
}

.theme-library__index li {
    display: grid;
    grid-template-columns: 2.4rem minmax(0, 1fr);
    gap: 0.65rem;
    align-items: center;
    min-height: 2.7rem;
    padding: 0.55rem 0.65rem 0.55rem 0;
    color: var(--text-strong);
    font-size: 0.72rem;
    border-top: 1px solid var(--border-soft);
}

.theme-library__index li:nth-child(even) {
    padding-left: 0.65rem;
    border-left: 1px solid var(--border-soft);
}

.theme-chip {
    display: grid;
    grid-template-columns: 34% 1fr;
    height: 1.35rem;
    overflow: hidden;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    background: var(--theme-canvas);
}

.theme-chip__rail {
    background: var(--theme-rail);
}

.theme-chip__accent {
    width: 55%;
    height: 3px;
    margin: auto;
    background: var(--theme-accent);
}

.theme-option {
    display: grid;
    grid-template-columns: minmax(9rem, 0.72fr) minmax(15rem, 1.28fr);
    gap: 1.25rem;
    align-items: center;
    padding: 0.9rem 0;
    border-bottom: 1px solid var(--border-soft);
}

.theme-option__copy h3 {
    margin: 0;
    color: var(--text-strong);
    font-size: 0.78rem;
    line-height: 1.4;
}

.theme-option__copy p {
    margin: 0.22rem 0 0;
    color: var(--text-muted);
    font-size: 0.67rem;
    line-height: 1.5;
}

.theme-option__previews {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
}

.theme-preview {
    min-width: 0;
}

.theme-preview__label {
    display: block;
    margin-bottom: 0.28rem;
    color: var(--text-muted);
    font-size: 0.6rem;
    line-height: 1.35;
    text-transform: uppercase;
}

.theme-swatch {
    display: grid;
    grid-template-columns: 14% 1fr;
    height: 2.8rem;
    overflow: hidden;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    background: var(--theme-canvas);
}

.theme-swatch__rail {
    background: var(--theme-rail);
}

.theme-swatch__surface {
    position: relative;
    align-self: stretch;
    margin: 0.42rem;
    background: var(--theme-surface);
}

.theme-swatch__accent,
.theme-swatch__ink {
    position: absolute;
    left: 0.42rem;
    display: block;
    height: 2px;
}

.theme-swatch__accent {
    top: 0.42rem;
    width: 68%;
    background: var(--theme-accent);
}

.theme-swatch__ink {
    top: 0.88rem;
    width: 48%;
    background: var(--theme-ink);
    opacity: 0.58;
}

.capability-groups {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2.6rem 3rem;
    margin-top: 2.8rem;
}

.capability-group {
    min-width: 0;
    border-top: 2px solid var(--brand-jade);
}

.capability-group h3 {
    margin: 0;
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--border-soft);
    color: var(--text-strong);
    font-size: 0.78rem;
    letter-spacing: 0.12em;
    line-height: 1.4;
    text-transform: uppercase;
}

.capability-group__items {
    display: grid;
}

.capability-item {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--border-soft);
}

.capability-item h4 {
    margin: 0;
    color: var(--text-strong);
    font-size: 0.78rem;
    line-height: 1.4;
}

.capability-item p {
    margin: 0.24rem 0 0;
    color: var(--text-muted);
    font-size: 0.68rem;
    line-height: 1.55;
}

.closing-cta {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 1.5rem;
    align-items: end;
    margin: 3.8rem 0 1.8rem;
    padding: 1.4rem;
    border-radius: var(--radius-lg);
}

.closing-cta h2 {
    font-size: 2.5rem;
}

.auth-page {
    display: grid;
    place-items: center;
    min-height: calc(100vh - 15rem);
}

.auth-card {
    width: min(720px, 100%);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    text-align: center;
}

.auth-state {
    display: grid;
    justify-items: center;
}

.auth-card h1 {
    font-size: 3.5rem;
}

.auth-card p {
    max-width: 42rem;
    margin-right: auto;
    margin-left: auto;
}

.auth-illustration {
    width: min(240px, 60vw);
    margin-bottom: 0.25rem;
}

.auth-spinner {
    width: 3.25rem;
    height: 3.25rem;
    margin-bottom: 1.2rem;
    border: 3px solid color-mix(in oklch, var(--brand-jade) 20%, var(--border-soft));
    border-top-color: var(--brand-jade-deep);
    border-radius: 50%;
    animation: spin 850ms linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@media (max-width: 1100px) {
    .product-hero__caption {
        display: none;
    }

    .trust-strip {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
}

@media (max-width: 1100px) {
    .landing-grid {
        grid-template-columns: minmax(0, 1fr);
        grid-template-areas:
            "hero"
            "rail"
            "body";
    }

    .product-hero {
        height: 590px;
    }

    .product-hero__image {
        object-fit: cover;
    }

    .page-rail {
        position: static;
    }

    .page-rail__nav {
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 0.25rem;
    }

    .page-rail__proof {
        display: none;
    }

    .trust-strip__list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        row-gap: 0.85rem;
    }

    .trust-strip__list li:nth-child(odd) {
        border-left: 0;
        padding-left: 0;
    }

    .showcase-chapter {
        padding: 4rem 0;
    }

    .showcase-chapter__copy {
        max-width: 48rem;
    }

    .closing-cta {
        grid-template-columns: 1fr;
        align-items: start;
    }
}

@media (max-width: 900px) {
    .showcase-chapter {
        grid-template-columns: minmax(0, 1fr);
        gap: 1.35rem;
    }

    .showcase-chapter--visual {
        grid-template-areas:
            "copy"
            "highlights"
            "media";
    }

    .showcase-chapter--text {
        grid-template-areas:
            "copy"
            "highlights";
    }

    .showcase-chapter__copy {
        max-width: 48rem;
    }

    .theme-library {
        grid-template-columns: minmax(0, 1fr);
        gap: 1.5rem;
    }

    .theme-library__heading {
        max-width: 48rem;
    }
}

@media (max-width: 720px) {
    #intro,
    .showcase-chapter,
    .theme-library,
    .capability-index {
        scroll-margin-top: 9.5rem;
    }

    .landing-grid,
    .auth-page {
        width: calc(100% - 1.25rem);
    }

    .product-hero {
        min-height: 520px;
        height: 520px;
    }

    .product-hero::after {
        background:
            linear-gradient(0deg, var(--hero-scrim) 0%, var(--hero-scrim) 64%, var(--hero-scrim-mobile-edge) 100%);
    }

    .product-hero__image {
        object-position: 56% center;
    }

    .product-hero__copy {
        left: 1.25rem;
        bottom: 1.35rem;
        width: calc(100% - 2.5rem);
    }

    .product-hero h1 {
        font-size: 4.15rem;
    }

    .product-hero__lede {
        font-size: 0.88rem;
    }

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

    .trust-strip__list {
        grid-template-columns: 1fr;
    }

    .trust-strip__list li,
    .trust-strip__list li:nth-child(odd) {
        padding: 0.55rem 0;
        border-top: 1px solid var(--border-soft);
        border-left: 0;
    }

    .showcase-chapter {
        padding: 3.35rem 0;
    }

    .showcase-chapter__copy h2,
    .theme-library__heading h2,
    .section-heading h2 {
        font-size: 2.3rem;
    }

    .theme-library {
        padding: 3.35rem 0;
    }

    .theme-option {
        grid-template-columns: minmax(0, 1fr);
        gap: 0.7rem;
    }

    .theme-library__index {
        grid-template-columns: minmax(0, 1fr);
    }

    .theme-library__index li,
    .theme-library__index li:nth-child(even) {
        padding: 0.55rem 0;
        border-left: 0;
    }

    .product-frame__image {
        aspect-ratio: 4 / 3;
    }

    .capability-index {
        padding-top: 3.6rem;
    }

    .capability-groups {
        grid-template-columns: 1fr;
        gap: 2.2rem;
    }

    .closing-cta {
        padding: 1.15rem;
    }

    .closing-cta h2 {
        font-size: 2.15rem;
    }
}

@media (max-width: 460px) {
    .button-row--hero .button,
    .closing-cta .button {
        width: 100%;
    }

    .product-hero h1 {
        font-size: 3.7rem;
    }

    .page-rail__nav {
        grid-template-columns: 1fr;
    }

    .theme-option__previews {
        gap: 0.5rem;
    }

    .auth-card h1 {
        font-size: 2.75rem;
    }
}

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

}

@media (forced-colors: active) {
    html,
    body {
        color: CanvasText;
        background: Canvas;
        background-image: none;
    }

    .surface-card,
    .product-hero,
    .product-frame__image,
    .button {
        border-color: CanvasText;
        background: Canvas;
        box-shadow: none;
        forced-color-adjust: auto;
    }

    .product-hero::after {
        display: none;
    }

    .product-hero__copy {
        padding: 1rem;
        border: 1px solid CanvasText;
        color: CanvasText;
        background: Canvas;
    }

    .product-hero h1,
    .product-hero__lede,
    .eyebrow--hero {
        color: CanvasText;
    }

    .product-hero__caption {
        display: none;
    }

    .button--primary,
    .button--hero-ghost {
        color: ButtonText;
        background: ButtonFace;
    }

    .page-rail__nav a:hover,
    .page-rail__nav a:focus-visible {
        border-left-color: Highlight;
        color: HighlightText;
        background: Highlight;
    }

    .theme-swatch {
        border-color: CanvasText;
        background: Canvas;
        forced-color-adjust: auto;
    }

    .theme-swatch__rail,
    .theme-swatch__ink {
        background: CanvasText;
    }

    .theme-swatch__surface {
        border: 1px solid CanvasText;
        background: Canvas;
    }

    .theme-swatch__accent {
        background: Highlight;
    }

}

.site-shell {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    width: min(var(--site-frame-width), calc(100% - 2rem));
    margin: 0.75rem auto 0;
    padding: 0.7rem 0.9rem;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    background: linear-gradient(180deg, color-mix(in oklch, var(--surface) 94%, var(--surface-tint) 6%), var(--surface));
    box-shadow: inset 0 1px 0 var(--surface-inner-highlight), 0 8px 18px var(--shadow-soft);
    backdrop-filter: blur(10px);
}

.site-shell--auth .site-header {
    width: min(960px, calc(100% - 2rem));
}

.brand-lockup {
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    color: inherit;
    text-decoration: none;
}

.brand-lockup__mark {
    width: 2.1rem;
    height: 2.1rem;
    border-radius: var(--radius-md);
    box-shadow: 0 5px 12px color-mix(in oklch, var(--brand-violet) 12%, transparent);
}

.brand-lockup__copy {
    display: grid;
    gap: 0.1rem;
}

.brand-lockup__wordmark {
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.02em;
}

.brand-lockup__subline {
    color: var(--text-muted);
    font-size: 0.68rem;
}

.site-header__actions {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
}

.theme-toggle {
    display: inline-grid;
    grid-template-columns: 1rem auto;
    align-items: center;
    gap: 0.45rem;
    min-height: 2.3rem;
    padding: 0.54rem 0.78rem;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-md);
    color: var(--text-strong);
    background: color-mix(in oklch, var(--surface) 88%, var(--surface-tint) 12%);
    font: 600 0.76rem/1 var(--font-mono);
    letter-spacing: 0.04em;
    cursor: pointer;
    transition: border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease, color 160ms ease;
}

.theme-toggle:hover {
    border-color: color-mix(in oklch, var(--brand-jade) 36%, var(--border-soft));
    background: color-mix(in oklch, var(--surface-strong) 88%, var(--brand-jade) 12%);
    box-shadow: 0 8px 18px var(--shadow-soft);
}

.theme-toggle:focus-visible {
    outline: 2px solid color-mix(in oklch, var(--brand-jade) 70%, transparent);
    outline-offset: 3px;
}

.theme-toggle__icon {
    grid-column: 1;
    grid-row: 1;
    width: 1rem;
    height: 1rem;
    transition: opacity 160ms ease, transform 160ms ease;
}

.theme-toggle__icon--light {
    border-radius: 999px;
    background:
        radial-gradient(circle, var(--brand-gold) 0 39%, transparent 40%),
        conic-gradient(from 0deg, transparent 0 8%, var(--brand-gold) 8% 13%, transparent 13% 20%, var(--brand-gold) 20% 25%, transparent 25% 33%, var(--brand-gold) 33% 38%, transparent 38% 45%, var(--brand-gold) 45% 50%, transparent 50% 58%, var(--brand-gold) 58% 63%, transparent 63% 70%, var(--brand-gold) 70% 75%, transparent 75% 83%, var(--brand-gold) 83% 88%, transparent 88%);
}

.theme-toggle__icon--dark {
    border-radius: 999px;
    background: var(--brand-jade);
    box-shadow: inset -0.28rem -0.12rem 0 0 var(--surface-strong);
    opacity: 0;
    transform: rotate(-30deg) scale(0.82);
}

:root[data-theme="dark"] .theme-toggle__icon--light {
    opacity: 0;
    transform: rotate(30deg) scale(0.82);
}

:root[data-theme="dark"] .theme-toggle__icon--dark {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.site-main {
    flex: 1;
}

.site-footer {
    width: min(var(--site-frame-width), calc(100% - 2rem));
    margin: 1rem auto 2rem;
    padding: 0.9rem 0.2rem 0;
    border-top: 1px solid var(--border-soft);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.site-footer__meta {
    max-width: 34rem;
}

.site-footer__eyebrow {
    margin: 0;
    color: var(--text-strong);
    font-size: 0.8rem;
    letter-spacing: 0.12em;
    font-weight: 600;
    text-transform: uppercase;
    font-family: var(--font-mono);
}

.site-footer__body {
    margin: 0.3rem 0 0;
    color: var(--text-muted);
    font-size: 0.78rem;
    line-height: 1.55;
}

.site-footer__links {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0.75rem 1.2rem;
}

.site-footer__links a {
    color: var(--text-muted);
    text-decoration: none;
    white-space: nowrap;
    font-size: 0.78rem;
}

.site-footer__links a:hover {
    color: var(--text-strong);
}

@media (max-width: 820px) {
    .site-header,
    .site-footer {
        width: calc(100% - 1.25rem);
    }

    .site-header,
    .site-footer {
        border-radius: var(--radius-lg);
        flex-direction: column;
        align-items: stretch;
    }

    .site-header__actions {
        width: 100%;
        justify-content: stretch;
    }

    .site-header__actions a {
        flex: 1;
        justify-content: center;
    }

    .site-footer__links {
        justify-content: flex-start;
    }
}