:root {
    --ink: oklch(24% 0.025 54);
    --muted: oklch(48% 0.025 54);
    --paper: oklch(96% 0.018 83);
    --surface: oklch(99% 0.012 83);
    --line: oklch(82% 0.025 73);
    --accent: oklch(50% 0.16 32);
    --accent-dark: oklch(39% 0.13 32);
    --success: oklch(48% 0.1 150);
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: clamp(3rem, 8vw, 6rem);
    --radius: 0.25rem;
    --fast: 120ms;
    --motion: cubic-bezier(0.25, 1, 0.5, 1);
}

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

html {
    color-scheme: light;
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    font-family: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", Georgia, serif;
    font-size: 1rem;
    line-height: 1.65;
    font-kerning: normal;
    padding-bottom: env(safe-area-inset-bottom);
}

button,
input {
    font: inherit;
}

a {
    color: inherit;
    text-decoration-thickness: 0.08em;
    text-underline-offset: 0.2em;
}

button,
a,
input,
summary {
    -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
summary:focus-visible {
    outline: 0.16rem solid var(--accent);
    outline-offset: 0.18rem;
}

code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.875rem;
    font-variant-ligatures: none;
}

.site-shell {
    width: min(74rem, calc(100% - 2rem));
    margin-inline: auto;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: fixed;
    top: 0.5rem;
    left: 0.5rem;
    z-index: 500;
    padding: 0.75rem 1rem;
    color: var(--surface);
    background: var(--ink);
    transform: translateY(-160%);
}

.skip-link:focus {
    transform: translateY(0);
}

.site-header {
    border-bottom: 1px solid var(--line);
    background: var(--surface);
}

.header-main {
    display: grid;
    gap: var(--space-md);
    padding-block: var(--space-md);
}

.site-name {
    align-self: center;
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.2;
    text-decoration: none;
    letter-spacing: -0.035em;
}

.top-nav {
    display: flex;
    gap: 0.25rem 1.25rem;
    overflow-x: auto;
    padding-block: 0.25rem;
    scrollbar-width: thin;
}

.top-nav a {
    min-height: 2.75rem;
    display: inline-flex;
    align-items: center;
    flex: 0 0 auto;
    color: var(--muted);
    text-decoration: none;
}

.site-search {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: stretch;
}

.site-search input {
    width: 100%;
    min-height: 2.75rem;
    padding: 0.6rem 0.75rem;
    color: var(--ink);
    background: var(--paper);
    border: 1px solid var(--line);
    border-right: 0;
    border-radius: var(--radius) 0 0 var(--radius);
}

.site-search input::placeholder {
    color: var(--muted);
}

.site-search button,
.copy-button {
    min-height: 2.75rem;
    padding: 0.55rem 1rem;
    color: var(--surface);
    background: var(--ink);
    border: 1px solid var(--ink);
    border-radius: 0 var(--radius) var(--radius) 0;
    cursor: pointer;
    transition: transform var(--fast) var(--motion), background-color var(--fast) var(--motion);
}

.copy-button {
    flex: 0 0 auto;
    border-radius: var(--radius);
}

.copy-button-small {
    min-height: 2.25rem;
    padding: 0.35rem 0.7rem;
    font-size: 0.875rem;
}

.copy-button.is-copied {
    background: var(--success);
    border-color: var(--success);
}

.intro-band {
    padding-block: var(--space-2xl);
    border-bottom: 1px solid var(--line);
    background:
        linear-gradient(90deg, transparent 0 63%, oklch(91% 0.04 66) 63% 63.2%, transparent 63.2%),
        var(--paper);
}

.intro-layout {
    display: grid;
    gap: var(--space-xl);
}

.intro-layout h1,
.page-heading h1,
.detail-heading h1 {
    max-width: 12ch;
    margin: 0;
    font-size: clamp(2.2rem, 8vw, 5.3rem);
    font-weight: 650;
    line-height: 0.98;
    letter-spacing: -0.06em;
}

.intro-copy {
    max-width: 34rem;
    margin: 0;
    color: var(--muted);
    font-size: 1.15rem;
}

.eyebrow {
    margin: 0 0 var(--space-sm);
    color: var(--accent-dark);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.section-block {
    padding-block: clamp(2.5rem, 7vw, 5rem);
    border-bottom: 1px solid var(--line);
}

.section-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.section-heading h2,
.detail-section h2,
.help-step h2,
.faq-section h2 {
    margin: 0;
    font-size: clamp(1.55rem, 4vw, 2.4rem);
    line-height: 1.15;
    letter-spacing: -0.04em;
}

.section-heading p,
.page-heading p,
.detail-sub,
.daily-count {
    color: var(--muted);
}

.text-link {
    color: var(--accent-dark);
    font-weight: 700;
}

.api-list {
    border-top: 1px solid var(--ink);
}

.api-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    padding-block: var(--space-md);
    border-bottom: 1px solid var(--line);
}

.api-item > div {
    min-width: 0;
}

.api-label {
    display: block;
    margin-bottom: var(--space-xs);
    color: var(--muted);
    font-size: 0.875rem;
}

.api-item code,
.help-code-line code {
    display: block;
    overflow-wrap: anywhere;
}

.copy-status {
    min-height: 1.65em;
    margin: var(--space-sm) 0 0;
    color: var(--success);
    font-size: 0.875rem;
}

.daily-count {
    margin: 0;
    white-space: nowrap;
}

.daily-count strong {
    color: var(--accent-dark);
    font-size: 1.5rem;
    font-variant-numeric: tabular-nums;
}

.resource-list {
    border-top: 1px solid var(--ink);
}

.resource-row {
    display: grid;
    grid-template-columns: 4rem minmax(10rem, 2fr) minmax(6rem, 1fr) minmax(6rem, 1fr) auto;
    gap: var(--space-md);
    align-items: baseline;
    min-height: 3.25rem;
    padding-block: 0.75rem;
    border-bottom: 1px solid var(--line);
    text-decoration: none;
    transition: color var(--fast) var(--motion), transform var(--fast) var(--motion);
}

.resource-row > * {
    min-width: 0;
}

.resource-row strong {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.resource-row span,
.resource-row time {
    color: var(--muted);
    font-size: 0.875rem;
}

.resource-row .resource-id {
    color: var(--accent-dark);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-variant-numeric: tabular-nums;
}

.category-tabs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
    border-top: 1px solid var(--ink);
    border-left: 1px solid var(--line);
}

.category-tabs a {
    display: flex;
    min-height: 6rem;
    flex-direction: column;
    justify-content: space-between;
    padding: var(--space-md);
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    text-decoration: none;
}

.category-tabs span {
    color: var(--muted);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.75rem;
}

.page-main {
    min-height: 65vh;
    padding-block: clamp(2.5rem, 7vw, 5rem);
}

.page-heading {
    display: grid;
    gap: var(--space-md);
    margin-bottom: clamp(2.5rem, 6vw, 4.5rem);
}

.page-heading h1,
.detail-heading h1 {
    max-width: 18ch;
    font-size: clamp(2.2rem, 7vw, 4.6rem);
}

.page-heading p {
    max-width: 48rem;
    margin: 0;
}

.pagination {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding-top: var(--space-xl);
}

.pagination a,
.pagination span {
    min-height: 2.75rem;
    display: inline-flex;
    align-items: center;
    padding: 0.45rem 0.8rem;
    border: 1px solid var(--line);
    text-decoration: none;
}

.pagination span {
    color: var(--muted);
}

.detail-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: var(--space-xl);
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--ink);
}

.detail-sub {
    margin: var(--space-md) 0 0;
}

.detail-stamp {
    flex: 0 0 auto;
    padding: 0.35rem 0.7rem;
    color: var(--accent-dark);
    border: 1px solid currentColor;
    transform: rotate(-2deg);
}

.detail-section {
    padding-block: clamp(2rem, 6vw, 4rem);
    border-bottom: 1px solid var(--line);
}

.detail-section > h2 {
    margin-bottom: var(--space-xl);
}

.meta-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
    margin: 0 0 var(--space-xl);
    border-top: 1px solid var(--line);
    border-left: 1px solid var(--line);
}

.meta-grid div {
    padding: var(--space-md);
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.meta-grid dt {
    color: var(--muted);
    font-size: 0.75rem;
}

.meta-grid dd {
    margin: var(--space-xs) 0 0;
    font-weight: 700;
}

.summary-text {
    max-width: 68ch;
}

.compact-heading {
    align-items: end;
}

.compact-heading > p {
    margin: 0;
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.8rem;
}

.source-groups {
    display: grid;
    gap: var(--space-xl);
}

.source-group h3 {
    margin: 0 0 var(--space-sm);
    font-size: 1rem;
}

.source-list {
    border-top: 1px solid var(--ink);
}

.source-row {
    display: grid;
    grid-template-columns: minmax(5rem, 0.7fr) auto minmax(12rem, 3fr) auto;
    gap: var(--space-md);
    align-items: center;
    padding-block: 0.7rem;
    border-bottom: 1px solid var(--line);
}

.source-row code {
    min-width: 0;
    overflow-wrap: anywhere;
}

.source-arrow {
    color: var(--accent-dark);
}

.help-heading {
    grid-template-columns: 1fr;
}

.help-step {
    display: grid;
    grid-template-columns: 3rem minmax(0, 1fr);
    gap: var(--space-lg);
    padding-block: clamp(2rem, 6vw, 4rem);
    border-top: 1px solid var(--line);
}

.step-number {
    color: var(--accent-dark);
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.875rem;
}

.help-step h2 {
    margin-bottom: var(--space-lg);
}

.help-code-line {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--surface);
    border: 1px solid var(--line);
}

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

.type-table {
    width: 100%;
    min-width: 32rem;
    border-collapse: collapse;
    font-variant-numeric: tabular-nums;
}

.type-table th,
.type-table td {
    padding: 0.7rem 0.8rem;
    border-bottom: 1px solid var(--line);
    text-align: left;
}

.type-table th {
    color: var(--muted);
    font-size: 0.75rem;
}

.param-list {
    margin: 0;
    border-top: 1px solid var(--ink);
}

.param-list div {
    display: grid;
    grid-template-columns: minmax(8rem, 0.5fr) minmax(12rem, 2fr);
    gap: var(--space-md);
    padding-block: 0.7rem;
    border-bottom: 1px solid var(--line);
}

.param-list dt {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-weight: 700;
}

.param-list dd {
    margin: 0;
    color: var(--muted);
}

.faq-section {
    padding-block: clamp(2rem, 6vw, 4rem);
}

.faq-section h2 {
    margin-bottom: var(--space-lg);
}

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

.faq-section details:last-child {
    border-bottom: 1px solid var(--line);
}

.faq-section summary {
    min-height: 3.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    cursor: pointer;
    font-weight: 700;
    list-style: none;
}

.faq-section summary::after {
    content: "+";
    color: var(--accent-dark);
    font-size: 1.4rem;
}

.faq-section details[open] summary::after {
    content: "−";
}

.faq-section details p {
    max-width: 65ch;
    margin: 0 0 var(--space-lg);
    color: var(--muted);
}

.site-footer {
    padding-block: clamp(2.5rem, 6vw, 4rem);
    color: var(--paper);
    background: var(--ink);
}

.footer-grid {
    display: grid;
    gap: var(--space-xl);
}

.footer-title {
    margin: 0 0 var(--space-sm);
    font-weight: 700;
}

.friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm) var(--space-lg);
}

.friend-links a {
    min-height: 2.75rem;
    display: inline-flex;
    align-items: center;
}

.footer-note {
    color: oklch(82% 0.025 73);
}

.footer-note p {
    margin: 0;
}

.notice-page {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: var(--space-lg);
}

.notice-box {
    width: min(38rem, 100%);
    padding-block: var(--space-xl);
    border-block: 1px solid var(--ink);
}

.notice-box h1 {
    margin: 0;
    font-size: clamp(2rem, 8vw, 4rem);
    line-height: 1;
    letter-spacing: -0.05em;
}

@media (hover: hover) {
    .top-nav a:hover,
    .text-link:hover {
        color: var(--accent-dark);
    }

    .resource-row:hover {
        color: var(--accent-dark);
        transform: translateX(0.25rem);
    }

    .category-tabs a:hover {
        color: var(--surface);
        background: var(--accent-dark);
    }

    .copy-button:hover,
    .site-search button:hover {
        background: var(--accent-dark);
        border-color: var(--accent-dark);
    }
}

@media (min-width: 48rem) {
    .header-main {
        grid-template-columns: auto minmax(0, 1fr) minmax(14rem, 19rem);
        align-items: center;
    }

    .top-nav {
        justify-content: center;
    }

    .intro-layout {
        grid-template-columns: minmax(0, 1.6fr) minmax(16rem, 0.8fr);
        align-items: end;
    }

    .footer-grid {
        grid-template-columns: minmax(0, 1fr) auto;
        align-items: end;
    }

    .help-heading {
        grid-template-columns: minmax(0, 1.3fr) minmax(16rem, 0.7fr);
        align-items: end;
    }
}

@media (max-width: 47.99rem) {
    .section-heading,
    .detail-heading {
        align-items: start;
        flex-direction: column;
    }

    .resource-row {
        grid-template-columns: 3.5rem minmax(0, 1fr) auto;
        gap: var(--space-xs) var(--space-sm);
    }

    .resource-row > span:not(.resource-id) {
        display: none;
    }

    .resource-row time {
        grid-column: 2 / -1;
    }

    .source-row {
        grid-template-columns: minmax(0, 1fr) auto;
        gap: var(--space-sm);
    }

    .source-arrow {
        display: none;
    }

    .source-row code {
        grid-column: 1 / -1;
        grid-row: 2;
    }

    .source-row .copy-button {
        grid-column: 2;
        grid-row: 1;
    }

    .help-code-line {
        align-items: stretch;
        flex-direction: column;
    }

    .param-list div {
        grid-template-columns: 1fr;
        gap: var(--space-xs);
    }
}

@media (pointer: coarse) {
    .copy-button,
    .site-search button,
    .pagination a,
    .top-nav a {
        min-height: 2.9rem;
    }
}

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

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}