@font-face {
    font-family: "IBM Plex Sans";
    font-style: normal;
    font-weight: 100 700;
    font-display: swap;
    src: url("/time/assets/ibm-plex-sans-latin.woff2") format("woff2");
}

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

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

:root {
    color-scheme: light;
    --page: #fffdf9;
    --surface: #f5f5f1;
    --surface-strong: #e8ebe5;
    --ink: #1d211e;
    --muted: #59615b;
    --line: #c9cec7;
    --line-strong: #858d85;
    --header: #20241f;
    --audio: #bd4b27;
    --audio-dark: #843116;
    --audio-soft: #fff3ed;
    --visual: #39705a;
    --visual-dark: #24503f;
    --visual-soft: #edf5ef;
    --warning: #86621c;
    --warning-soft: #f6f0e1;
    --font-sans: "IBM Plex Sans", "Helvetica Neue", sans-serif;
    --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
    --content: 76rem;
    --measure: 68ch;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 5rem;
}

body {
    margin: 0;
    background: var(--page);
    color: var(--ink);
    font-family: var(--font-sans);
    font-size: 1.0625rem;
    line-height: 1.62;
    text-rendering: optimizeLegibility;
}

a {
    color: var(--audio-dark);
    text-decoration-thickness: 1px;
    text-underline-offset: 0.18em;
}

a:hover {
    color: var(--audio);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
    outline: 3px solid color-mix(in srgb, var(--audio) 35%, transparent);
    outline-offset: 3px;
}

.visual-page a {
    color: var(--visual-dark);
}

.visual-page a:hover {
    color: var(--visual);
}

.visual-page a:focus-visible,
.visual-page button:focus-visible,
.visual-page summary:focus-visible {
    outline-color: color-mix(in srgb, var(--visual) 35%, transparent);
}

h1,
h2,
h3,
h4,
p {
    margin-top: 0;
}

h1,
h2,
h3,
h4 {
    color: var(--ink);
    font-weight: 600;
    letter-spacing: -0.025em;
    line-height: 1.12;
}

p,
li {
    max-width: var(--measure);
}

.page-shell,
.document {
    width: min(calc(100% - 2rem), var(--content));
    margin-inline: auto;
}

.skip-link {
    position: fixed;
    top: 0;
    left: -100rem;
    z-index: 100;
    padding: 0.7rem 0.9rem;
    background: var(--page);
    color: var(--ink);
}

.skip-link:focus {
    left: 0;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    border-bottom: 2px solid var(--audio);
    background: var(--header);
    color: #f7f8f5;
}

.visual-page .site-header {
    border-bottom-color: var(--visual);
}

.site-nav {
    display: flex;
    gap: 1rem 2rem;
    align-items: center;
    justify-content: space-between;
    min-height: 4rem;
    padding-block: 0.65rem;
}

.site-name {
    color: #ffffff;
    font-size: 0.86rem;
    font-weight: 600;
    text-decoration: none;
}

.site-name:hover,
.site-name:focus-visible {
    color: #ffffff;
    text-decoration: underline;
}

.site-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem 1.1rem;
    justify-content: flex-end;
}

.site-links a {
    padding: 0.2rem 0;
    border-bottom: 2px solid transparent;
    color: #d6dad3;
    font-size: 0.84rem;
    text-decoration: none;
}

.site-links a:hover,
.site-links a:focus-visible {
    border-bottom-color: #ffffff;
    color: #ffffff;
}

.site-links a[aria-current="page"] {
    border-bottom-color: var(--audio);
    color: #ffffff;
}

.visual-page .site-links a[aria-current="page"] {
    border-bottom-color: var(--visual);
}

.document {
    padding-bottom: 4rem;
}

.breadcrumbs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem 0.55rem;
    margin: 0;
    padding: 1.25rem 0 0;
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.76rem;
    list-style: none;
}

.breadcrumbs li + li::before {
    margin-right: 0.55rem;
    content: "/";
    color: var(--line-strong);
}

.hero {
    padding: clamp(3.2rem, 8vw, 6.6rem) 0 clamp(2.8rem, 6vw, 4.8rem);
}

.hero h1 {
    max-width: 18ch;
    margin-bottom: 1.1rem;
    font-size: clamp(2.6rem, 6vw, 4.1rem);
    letter-spacing: -0.048em;
}

.hero__subtitle {
    display: block;
    max-width: 30ch;
    margin-top: 0.65rem;
    color: var(--muted);
    font-size: 0.48em;
    font-weight: 400;
    letter-spacing: -0.02em;
    line-height: 1.35;
}

.hero__lead {
    max-width: 65ch;
    margin-bottom: 1.4rem;
    color: #414841;
    font-size: clamp(1.17rem, 2.1vw, 1.34rem);
    line-height: 1.56;
}

.hero__answer {
    max-width: 62rem;
    margin: 1.5rem 0 0;
    padding: 1rem 1.15rem;
    border-left: 4px solid var(--audio);
    background: var(--audio-soft);
    font-size: 1.05rem;
}

.visual-page .hero__answer {
    border-left-color: var(--visual);
    background: var(--visual-soft);
}

.hero__answer strong {
    color: var(--audio-dark);
}

.visual-page .hero__answer strong {
    color: var(--visual-dark);
}

.status-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    margin: 1.25rem 0 0;
}

.status {
    padding: 0.35rem 0.55rem;
    border: 1px solid var(--line-strong);
    border-radius: 6px;
    background: transparent;
    color: var(--ink);
    font-family: var(--font-mono);
    font-size: 0.72rem;
}

.status--recommended {
    border-color: var(--audio);
    background: var(--audio-soft);
    color: var(--audio-dark);
}

.visual-page .status--recommended {
    border-color: var(--visual);
    background: var(--visual-soft);
    color: var(--visual-dark);
}

.section {
    padding: clamp(2.8rem, 6vw, 5rem) 0;
    border-top: 1px solid var(--line);
}

.section--quiet {
    padding-block: clamp(2rem, 4vw, 3.2rem);
}

.section h2 {
    max-width: 24ch;
    margin-bottom: 0.65rem;
    font-size: clamp(1.8rem, 3.4vw, 2.45rem);
}

.section h2 + p {
    margin-bottom: 1.5rem;
    color: var(--muted);
}

.section h3 {
    margin-bottom: 0.5rem;
    font-size: 1.18rem;
}

.system-rows {
    border-top: 1px solid var(--line-strong);
    border-bottom: 1px solid var(--line-strong);
}

.system-row {
    display: grid;
    grid-template-columns: 8rem minmax(0, 1fr) auto;
    gap: 1rem 2rem;
    align-items: center;
    padding: 1.2rem 0;
}

.system-row + .system-row {
    border-top: 1px solid var(--line);
}

.system-row__name {
    color: var(--audio-dark);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
}

.system-row--visual .system-row__name {
    color: var(--visual-dark);
}

.system-row__flow {
    font-size: 1.08rem;
    font-weight: 500;
}

.system-row__flow code {
    font-size: 0.86em;
}

.text-link {
    white-space: nowrap;
}

code,
.technical {
    font-family: var(--font-mono);
    font-size: 0.9em;
}

.roles {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-top: 1px solid var(--line-strong);
    border-bottom: 1px solid var(--line-strong);
}

.role {
    min-width: 0;
    padding: 1.15rem 1.2rem 1.2rem 0;
}

.role + .role {
    padding-left: 1.2rem;
    border-left: 1px solid var(--line);
}

.role h3 {
    margin-bottom: 0.4rem;
    font-size: 1rem;
}

.role p {
    margin: 0;
    color: var(--muted);
    font-size: 0.94rem;
}

.critical {
    margin: 1.7rem 0 0;
    padding: 1rem 1.1rem;
    border: 1px solid color-mix(in srgb, var(--warning) 38%, var(--line));
    border-left: 4px solid var(--warning);
    background: var(--warning-soft);
}

.critical p {
    margin: 0;
}

.diagram {
    margin: 1.5rem 0 0;
}

.diagram__frame {
    padding: clamp(0.6rem, 2vw, 1.2rem);
    border: 1px solid var(--line);
    background: #fffdf9;
}

.diagram picture,
.diagram img {
    display: block;
}

.diagram img {
    width: 100%;
    height: auto;
}

.diagram figcaption {
    max-width: 70ch;
    margin-top: 0.65rem;
    color: var(--muted);
    font-size: 0.86rem;
}

.diagram__legend {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    margin-bottom: 0.7rem;
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.72rem;
}

.diagram__legend span {
    display: inline-flex;
    gap: 0.4rem;
    align-items: center;
}

.legend-swatch {
    width: 1.4rem;
    border-top: 2px solid var(--audio);
}

.legend-swatch--control {
    border-color: var(--warning);
    border-top-style: dashed;
}

.legend-swatch--optional {
    border-color: var(--line-strong);
    border-top-style: dashed;
}

.legend-swatch--visual {
    border-color: var(--visual);
}

.change-note {
    display: grid;
    grid-template-columns: minmax(10rem, 0.35fr) minmax(0, 1.65fr);
    gap: 1rem 2rem;
    margin-top: 1.4rem;
    padding: 1.2rem 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.change-note strong {
    color: var(--audio-dark);
    font-size: 1.1rem;
}

.change-note p {
    margin: 0;
}

.option {
    margin-top: 2rem;
    padding: 1.35rem;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface);
}

.option__head {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.8rem 1.5rem;
    align-items: start;
    margin-bottom: 1rem;
}

.option__head h2,
.option__head h3 {
    margin: 0;
}

.option__head p {
    margin: 0.35rem 0 0;
    color: var(--muted);
}

.option__label {
    padding: 0.32rem 0.5rem;
    border: 1px solid var(--line-strong);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
}

.option--primary {
    border-color: color-mix(in srgb, var(--audio) 45%, var(--line));
    background: var(--audio-soft);
}

.visual-page .option--primary {
    border-color: color-mix(in srgb, var(--visual) 45%, var(--line));
    background: var(--visual-soft);
}

.option-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem 2rem;
    margin-top: 1.2rem;
}

.option-grid h3 {
    margin-bottom: 0.35rem;
    font-size: 1rem;
}

.option-grid p,
.option-grid ul {
    margin-top: 0;
    color: var(--muted);
    font-size: 0.92rem;
}

.ready-strip {
    margin-top: 1.3rem;
    padding: 1rem 1.1rem;
    border-left: 4px solid var(--visual);
    background: var(--visual-soft);
}

.ready-strip h3 {
    margin-bottom: 0.6rem;
    color: var(--visual-dark);
}

.ready-strip ul {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.35rem 1.5rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.ready-strip li {
    position: relative;
    padding-left: 1.3rem;
    font-size: 0.92rem;
}

.ready-strip li::before {
    position: absolute;
    left: 0;
    color: var(--visual);
    content: "✓";
    font-weight: 700;
}

.projection-warning {
    margin-top: 1.5rem;
    padding: 1.1rem;
    border: 1px solid color-mix(in srgb, var(--warning) 38%, var(--line));
    background: var(--warning-soft);
}

.projection-warning strong {
    display: block;
    margin-bottom: 0.3rem;
    font-size: 1.1rem;
}

.projection-warning p {
    margin: 0;
}

.details-header {
    display: flex;
    gap: 1rem 2rem;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.details-header h2 {
    margin: 0;
}

.details-toggle {
    min-height: 2.75rem;
    padding: 0.55rem 0.75rem;
    border: 1px solid var(--line-strong);
    border-radius: 6px;
    background: transparent;
    color: var(--ink);
    font: inherit;
    font-size: 0.84rem;
    cursor: pointer;
}

.details-toggle:hover {
    background: var(--surface);
}

.details-list {
    border-top: 1px solid var(--line-strong);
}

.tech-detail {
    border-bottom: 1px solid var(--line);
}

.tech-detail summary {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.25rem 1rem;
    min-height: 4.4rem;
    padding: 0.85rem 2.4rem 0.85rem 0.2rem;
    align-content: center;
    cursor: pointer;
    list-style: none;
}

.tech-detail summary::-webkit-details-marker {
    display: none;
}

.tech-detail summary::after {
    position: absolute;
    top: 50%;
    right: 0.65rem;
    width: 0.55rem;
    height: 0.55rem;
    border-right: 2px solid var(--muted);
    border-bottom: 2px solid var(--muted);
    content: "";
    transform: translateY(-65%) rotate(45deg);
    transition: transform 160ms ease;
}

.tech-detail[open] summary::after {
    transform: translateY(-35%) rotate(225deg);
}

.tech-detail[open] summary {
    background: var(--surface);
}

.summary-title {
    color: var(--ink);
    font-weight: 600;
}

.summary-description {
    grid-column: 1;
    color: var(--muted);
    font-size: 0.86rem;
}

.summary-meta {
    grid-column: 2;
    grid-row: 1 / span 2;
    align-self: center;
    color: var(--muted);
    font-family: var(--font-mono);
    font-size: 0.72rem;
}

.detail-body {
    padding: 0.5rem 1rem 1.5rem;
}

.detail-body > :last-child {
    margin-bottom: 0;
}

.detail-body h3 {
    margin-top: 1.4rem;
}

.detail-body p,
.detail-body li {
    color: #424943;
}

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

.detail-columns > * {
    min-width: 0;
}

.question-list,
.test-list,
.resource-list {
    margin: 0;
    padding: 0;
    list-style: none;
}

.question-list {
    counter-reset: questions;
}

.question-list li {
    display: grid;
    grid-template-columns: 2rem minmax(0, 1fr);
    gap: 0.7rem;
    padding: 0.65rem 0;
    border-bottom: 1px solid var(--line);
    counter-increment: questions;
}

.question-list li::before {
    color: var(--audio);
    content: counter(questions, decimal-leading-zero);
    font-family: var(--font-mono);
    font-size: 0.76rem;
}

.visual-page .question-list li::before {
    color: var(--visual);
}

.test-list {
    counter-reset: tests;
}

.test-list li {
    display: grid;
    grid-template-columns: 2rem minmax(11rem, 0.48fr) minmax(0, 1.52fr);
    gap: 0.7rem 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--line);
    counter-increment: tests;
}

.test-list li::before {
    color: var(--audio);
    content: counter(tests, decimal-leading-zero);
    font-family: var(--font-mono);
    font-size: 0.76rem;
}

.visual-page .test-list li::before {
    color: var(--visual);
}

.test-list strong {
    font-size: 0.92rem;
}

.test-list span {
    color: var(--muted);
    font-size: 0.9rem;
}

.resource-list li {
    display: grid;
    grid-template-columns: minmax(13rem, 0.6fr) minmax(0, 1.4fr);
    gap: 0.3rem 1.5rem;
    padding: 0.7rem 0;
    border-bottom: 1px solid var(--line);
}

.resource-list a {
    align-self: start;
    color: var(--ink);
    font-size: 0.9rem;
    font-weight: 600;
}

.resource-list span {
    color: var(--muted);
    font-size: 0.87rem;
}

.routing-table,
.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.routing-table th,
.routing-table td,
.comparison-table th,
.comparison-table td {
    padding: 0.68rem;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

.routing-table thead th,
.comparison-table thead th {
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 600;
}

.routing-table tbody th,
.comparison-table tbody th {
    font-weight: 600;
}

.routing-table code {
    white-space: nowrap;
}

.table-wrap {
    overflow-x: auto;
}

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

.brief-link {
    display: block;
    padding: 1.2rem;
    border: 1px solid var(--line-strong);
    border-radius: 8px;
    color: var(--ink);
    text-decoration: none;
}

.brief-link:hover {
    border-color: var(--audio);
    background: var(--audio-soft);
    color: var(--ink);
}

.brief-link--visual:hover {
    border-color: var(--visual);
    background: var(--visual-soft);
}

.brief-link strong,
.brief-link span {
    display: block;
}

.brief-link strong {
    margin-bottom: 0.3rem;
    font-size: 1.15rem;
}

.brief-link span {
    color: var(--muted);
    font-size: 0.92rem;
}

.site-footer {
    border-top: 1px solid #3b4038;
    background: var(--header);
    color: #d5d8d1;
}

.site-footer__row {
    display: flex;
    gap: 1rem 2rem;
    align-items: center;
    justify-content: space-between;
    min-height: 4rem;
    padding-block: 0.75rem;
}

.site-footer p {
    margin: 0;
    font-size: 0.78rem;
}

.site-footer a {
    color: #ffffff;
    font-size: 0.82rem;
}

@media (max-width: 800px) {
    html {
        scroll-padding-top: 7rem;
    }

    .site-nav {
        align-items: flex-start;
        flex-direction: column;
        gap: 0.45rem;
    }

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

    .hero {
        padding-top: 2.8rem;
    }

    .hero h1 {
        font-size: clamp(2.3rem, 11vw, 3.2rem);
    }

    .system-row {
        grid-template-columns: 1fr;
        gap: 0.25rem;
    }

    .system-row .text-link {
        margin-top: 0.25rem;
    }

    .roles,
    .option-grid,
    .detail-columns,
    .brief-links {
        grid-template-columns: 1fr;
    }

    .role,
    .role + .role {
        padding: 1rem 0;
        border-left: 0;
    }

    .role + .role {
        border-top: 1px solid var(--line);
    }

    .change-note {
        grid-template-columns: 1fr;
        gap: 0.45rem;
    }

    .option__head {
        grid-template-columns: 1fr;
    }

    .option__label {
        justify-self: start;
    }

    .ready-strip ul {
        grid-template-columns: 1fr;
    }

    .details-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .summary-meta {
        grid-column: 1;
        grid-row: auto;
        margin-top: 0.25rem;
    }

    .tech-detail summary {
        grid-template-columns: 1fr;
    }

    .test-list li {
        grid-template-columns: 2rem 1fr;
    }

    .test-list span {
        grid-column: 2;
    }

    .resource-list li {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 1rem;
    }

    .page-shell,
    .document {
        width: min(calc(100% - 1.2rem), var(--content));
    }

    .site-links {
        column-gap: 0.75rem;
    }

    .status-row {
        align-items: flex-start;
        flex-direction: column;
    }

    .diagram__frame {
        padding: 0.35rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .tech-detail summary::after {
        transition: none;
    }
}

@media print {
    body {
        background: #ffffff;
        color: #000000;
    }

    .site-header,
    .site-footer,
    .details-toggle {
        display: none;
    }

    .document {
        width: 100%;
        padding: 0;
    }

    .hero,
    .section {
        padding-block: 1.2rem;
    }

    .tech-detail:not([open]) > :not(summary) {
        display: block !important;
    }

    .tech-detail summary::after {
        display: none;
    }

    .diagram,
    .option,
    .tech-detail {
        break-inside: avoid;
    }

    a {
        color: #000000;
    }
}