:root {
    --ink: #171717;
    --muted: #646464;
    --line: #d9d9d9;
    --orange: #ed6a1c;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    background: #fff;
    font-family:
        "Avenir Next", "Hiragino Sans", "Yu Gothic", "BIZ UDPGothic", sans-serif;
    font-size: 17px;
    font-weight: 500;
    line-height: 1.8;
    line-break: strict;
    word-break: normal;
    overflow-wrap: normal;
    text-wrap: pretty;
}

a {
    color: inherit;
    text-decoration-thickness: 1px;
    text-underline-offset: 4px;
}

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

.skip-link {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

.skip-link:focus {
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 2;
    width: auto;
    height: auto;
    margin: 0;
    padding: 0.45rem 0.8rem;
    overflow: visible;
    clip: auto;
    clip-path: none;
    background: #fff;
    border: 1px solid var(--ink);
}

.site-header,
main,
footer {
    width: min(900px, calc(100% - 40px));
    margin-inline: auto;
}

.site-header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    padding: 26px 0;
}

.site-name {
    font-size: 1.3rem;
    font-weight: 800;
    text-decoration: none;
}

nav {
    display: flex;
    gap: 1.4rem;
    font-size: 0.92rem;
}

nav a {
    text-decoration: none;
}

main {
    padding-bottom: 64px;
}

section {
    padding: 32px 0;
    scroll-margin-top: 20px;
}

.intro {
    padding-top: 38px;
    padding-bottom: 42px;
}

h1,
h2,
h3 {
    text-wrap: balance;
}

h1 {
    max-width: 16em;
    margin: 0;
    font-size: clamp(2rem, 6vw, 3rem);
    line-height: 1.35;
    letter-spacing: -0.025em;
}

.summary {
    max-width: 45em;
    margin: 18px 0 22px;
    text-wrap: pretty;
}

.alias-example {
    display: grid;
    grid-template-columns: minmax(100px, 0.6fr) auto minmax(0, 2fr);
    align-items: center;
    gap: 1rem;
    max-width: 720px;
    margin: 24px 0 0;
    padding: 14px 0;
    border-block: 1px solid var(--line);
}

.alias-input,
.alias-output {
    display: grid;
    gap: 1px;
    font-weight: 700;
}

.alias-example small {
    color: var(--muted);
    font-size: 0.7rem;
    font-weight: 500;
}

.alias-arrow,
.number {
    color: var(--orange);
}

.alias-output code {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.92rem;
    font-weight: 650;
    overflow-wrap: anywhere;
}

.intro-links {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1.4rem;
    margin-top: 30px;
}

.install-link {
    padding: 9px 15px;
    color: #fff;
    background: var(--orange);
    border-radius: 9px;
    font-weight: 700;
    text-decoration: none;
}

.install-link:hover {
    color: #fff;
    background: #cf5510;
}

.text-link {
    font-weight: 650;
    text-decoration: none;
}

.text-link:hover {
    text-decoration: underline;
}

h2 {
    margin: 0 0 24px;
    font-size: 1.55rem;
    line-height: 1.5;
    letter-spacing: -0.015em;
}

h3 {
    margin: 0;
    font-size: 1.02rem;
}

p {
    margin: 0 0 18px;
}

.flow,
.setup-steps,
.document-links {
    margin: 0;
    padding: 0;
    list-style: none;
}

.flow {
    max-width: 700px;
}

.flow li {
    display: grid;
    grid-template-columns: 2.4rem 1fr;
    gap: 0.7rem;
    padding: 5px 0 24px;
    position: relative;
}

.flow li:not(:last-child)::after {
    content: "↓";
    position: absolute;
    bottom: 2px;
    left: 0.65rem;
    color: var(--orange);
    font-weight: 700;
}

.number {
    padding-top: 0.18rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.75rem;
    font-weight: 800;
}

.flow p {
    margin: 1px 0;
    color: var(--muted);
    text-wrap: pretty;
}

.flow-notes {
    max-width: calc(700px - 3.1rem);
    margin: 8px 0 0 3.1rem;
    padding: 0.85rem 0;
    border-block: 1px solid var(--line);
    list-style: none;
    color: var(--muted);
    font-size: 0.92rem;
    text-wrap: pretty;
}

.flow-notes li + li {
    margin-top: 0.4rem;
}

.setup-intro {
    max-width: 45em;
    text-wrap: pretty;
}

.setup-steps {
    max-width: 720px;
    margin-bottom: 18px;
}

.setup-steps li {
    display: grid;
    grid-template-columns: 2.4rem 1fr;
    gap: 0.7rem;
    padding: 11px 0 17px;
}

.setup-steps p {
    margin: 2px 0 0;
    color: var(--muted);
    text-wrap: pretty;
}

.setup-steps code {
    white-space: nowrap;
}

.inline-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.55rem;
    margin-top: 9px;
}

.inline-actions a {
    display: inline-block;
    padding: 5px 10px;
    border: 1px solid var(--orange);
    border-radius: 7px;
    color: var(--ink);
    font-size: 0.82rem;
    font-weight: 650;
    text-decoration: none;
    white-space: nowrap;
}

.inline-actions a:hover {
    color: #fff;
    background: var(--orange);
}

.document-links li {
    display: grid;
    grid-template-columns: minmax(10rem, 0.65fr) 1.35fr;
    gap: 1rem;
    margin: 8px 0;
}

.document-links a {
    text-decoration: none;
}

.document-links a:hover {
    text-decoration: underline;
}

.document-links li > span {
    color: var(--muted);
}

footer {
    display: flex;
    justify-content: space-between;
    padding: 24px 0 38px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.82rem;
}

@media (max-width: 560px) {
    body {
        font-size: 16px;
    }

    .site-header {
        padding: 20px 0;
    }

    main {
        padding-bottom: 40px;
    }

    section {
        padding: 34px 0;
    }

    .intro {
        padding-top: 30px;
        padding-bottom: 36px;
    }

    h1 {
        max-width: none;
        font-size: clamp(1.9rem, 9vw, 2.5rem);
    }

    .alias-example {
        grid-template-columns: 1fr;
        gap: 0.45rem;
    }

    .alias-arrow {
        transform: rotate(90deg);
        width: max-content;
    }

    .document-links li {
        grid-template-columns: 1fr;
        gap: 0;
        margin-bottom: 13px;
    }
}

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

.site-name {
    display: flex;
    align-items: center;
    gap: 8px;
}
.site-name img {
    flex-shrink: 0;
}

/* Shared navigation and policy layouts. */
.site-header,
footer {
    flex-wrap: wrap;
    gap: 16px;
}
nav {
    flex-wrap: wrap;
    gap: 0.7rem 1.4rem;
}
.policy {
    max-width: 760px;
}
.policy section {
    padding: 24px 0;
}
.policy h2 {
    margin-bottom: 14px;
}
.policy li + li {
    margin-top: 12px;
}
.policy p,
.policy li {
    overflow-wrap: anywhere;
}

.section-intro {
    max-width: 45em;
    margin-bottom: 28px;
}

.extension-demo {
    width: min(100%, 430px);
    margin: 28px 0;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 10px;
}

.extension-demo-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 11px 14px;
    border-bottom: 1px solid var(--line);
    font-size: 0.9rem;
}

.extension-demo-body {
    padding: 18px;
}

.extension-demo-body label {
    display: block;
    margin-bottom: 4px;
    font-size: 0.75rem;
    font-weight: 650;
}

.extension-demo-input {
    display: block;
    width: 100%;
    padding: 8px 10px;
    color: var(--ink);
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 6px;
    font: inherit;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.9rem;
}

.extension-demo-input:focus {
    outline: 2px solid var(--orange);
    outline-offset: 2px;
}

.extension-demo-help {
    display: block;
    margin-top: 5px;
    color: var(--muted);
    font-size: 0.72rem;
}

.extension-demo-button {
    display: block;
    width: max-content;
    margin-top: 14px;
    padding: 7px 11px;
    color: var(--ink);
    background: #fff;
    border: 1px solid var(--orange);
    border-radius: 6px;
    font: inherit;
    font-size: 0.82rem;
    font-weight: 700;
    cursor: pointer;
}

.extension-demo-button:hover {
    color: #fff;
    background: var(--orange);
}

.extension-demo-button:focus-visible {
    outline: 2px solid var(--orange);
    outline-offset: 2px;
}

.extension-demo-error {
    margin: 12px 0 0;
    font-size: 0.82rem;
}

.extension-demo-result {
    display: grid;
    gap: 2px;
    margin-top: 18px;
    padding-top: 14px;
    border-top: 1px solid var(--line);
}

.extension-demo-result small {
    color: var(--muted);
    font-size: 0.72rem;
}

.extension-demo-result code {
    overflow-wrap: anywhere;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 0.86rem;
    font-weight: 650;
}

.usage-note {
    max-width: 45em;
}

.mechanism-note {
    max-width: calc(700px - 3.1rem);
    margin: 10px 0 0 3.1rem;
    padding: 18px 0 2px;
    border-top: 1px solid var(--line);
}

.mechanism-note p {
    max-width: 42em;
}

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

@media (max-width: 560px) {
    .extension-demo {
        width: 100%;
    }

    .mechanism-note {
        max-width: none;
        margin-left: 0;
    }
}