:root {
    --color-bg: #ffffff;
    --color-bg-soft: #f7f9fc;
    --color-bg-blue: #eff6ff;
    --color-text: #1f2937;
    --color-muted: #64748b;
    --color-border: #e5eaf0;
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-accent: #06b6d4;
    --color-navy: #0f172a;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --font-heading:
        "Zen Kaku Gothic New", "Noto Sans JP", "Hiragino Kaku Gothic ProN",
        "Hiragino Sans", sans-serif;
    --font-body:
        "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo,
        sans-serif;
    --font-code: SFMono-Regular, Consolas, "Liberation Mono", Menlo, monospace;
    --shadow-sm: 0 8px 24px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 18px 48px rgba(15, 23, 42, 0.1);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 28px;
    --container: 1120px;
    --header-height: 72px;
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-height) + 24px);
}

body {
    margin: 0;
    overflow-x: hidden;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.8;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

body.is-menu-open {
    overflow: hidden;
}

img,
svg {
    max-width: 100%;
    height: auto;
    vertical-align: middle;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
textarea,
select {
    font: inherit;
}

button {
    cursor: pointer;
}

:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.35);
    outline-offset: 4px;
}

::selection {
    background: rgba(6, 182, 212, 0.22);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    clip-path: inset(50%);
}

.skip-link {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 1000;
    transform: translateY(-150%);
    border-radius: var(--radius-sm);
    background: var(--color-navy);
    color: #fff;
    padding: 10px 14px;
    font-weight: 700;
    transition: transform 0.2s var(--ease-out);
}

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.94);
    transition:
        box-shadow 0.25s var(--ease-out),
        backdrop-filter 0.25s var(--ease-out);
}

.site-header.is-scrolled {
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
    backdrop-filter: blur(12px);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: min(100% - 40px, var(--container));
    min-height: var(--header-height);
    margin-inline: auto;
    gap: 24px;
}

.site-header__brand {
    display: inline-flex;
    align-items: center;
    flex: 0 0 auto;
}

.site-header__logo {
    width: 160px;
    height: 48px;
    object-fit: contain;
}

.site-header__toggle {
    display: none;
    position: relative;
    width: 44px;
    height: 44px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: #fff;
}

.site-header__toggle-line {
    position: absolute;
    left: 11px;
    width: 20px;
    height: 2px;
    border-radius: 999px;
    background: var(--color-navy);
    transition:
        transform 0.24s var(--ease-out),
        opacity 0.2s var(--ease-out),
        top 0.24s var(--ease-out);
}

.site-header__toggle-line:nth-child(1) {
    top: 14px;
}

.site-header__toggle-line:nth-child(2) {
    top: 21px;
}

.site-header__toggle-line:nth-child(3) {
    top: 28px;
}

.site-header__toggle[aria-expanded="true"]
    .site-header__toggle-line:nth-child(1) {
    top: 21px;
    transform: rotate(42deg);
}

.site-header__toggle[aria-expanded="true"]
    .site-header__toggle-line:nth-child(2) {
    opacity: 0;
}

.site-header__toggle[aria-expanded="true"]
    .site-header__toggle-line:nth-child(3) {
    top: 21px;
    transform: rotate(-42deg);
}

.global-nav__list {
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.global-nav__link {
    display: inline-flex;
    align-items: center;
    min-height: 42px;
    border-radius: 999px;
    padding: 0 14px;
    color: var(--color-text);
    font-size: 14px;
    font-weight: 700;
    transition:
        background 0.2s var(--ease-out),
        color 0.2s var(--ease-out);
}

.global-nav__link:hover,
.global-nav__link:focus-visible {
    background: var(--color-bg-blue);
    color: var(--color-primary-dark);
}

.global-nav__link--external {
    border: 1px solid rgba(37, 99, 235, 0.18);
    color: var(--color-primary);
}

.hero {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.96) 0%,
        rgba(239, 246, 255, 0.98) 62%,
        rgba(230, 252, 255, 0.88) 100%
    );
}

.hero__inner {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.7fr);
    align-items: center;
    width: min(100% - 40px, var(--container));
    min-height: calc(760px - var(--header-height));
    margin-inline: auto;
    padding: 88px 0 104px;
    gap: 56px;
}

.hero__content {
    position: relative;
    z-index: 2;
}

.hero__label,
.section-heading__label,
.tool-banner__label,
.play-section__label {
    margin: 0 0 14px;
    color: var(--color-primary);
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 900;
    letter-spacing: 0;
    text-transform: uppercase;
}

.hero__title {
    margin: 0;
    color: var(--color-navy);
    font-family: var(--font-heading);
    font-size: clamp(48px, 8vw, 104px);
    font-weight: 900;
    line-height: 0.98;
    letter-spacing: 0;
}

.hero__title span {
    font-size: 0.9em;
}

.hero__copy {
    max-width: 760px;
    margin: 32px 0 0;
    color: var(--color-navy);
    font-family: var(--font-heading);
    font-size: clamp(25px, 4vw, 48px);
    font-weight: 900;
    line-height: 1.38;
}

.hero__lead {
    max-width: 720px;
    margin: 24px 0 0;
    color: var(--color-muted);
    font-size: 17px;
    line-height: 2;
}

.hero__buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 36px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 0 24px;
    font-weight: 900;
    line-height: 1.2;
    transition:
        transform 0.2s var(--ease-out),
        box-shadow 0.2s var(--ease-out),
        background 0.2s var(--ease-out),
        color 0.2s var(--ease-out);
}

.button:hover {
    transform: translateY(-2px);
}

.button--primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 14px 30px rgba(37, 99, 235, 0.24);
}

.button--primary:hover,
.button--primary:focus-visible {
    background: var(--color-primary-dark);
}

.button--secondary {
    border-color: rgba(37, 99, 235, 0.24);
    background: #fff;
    color: var(--color-primary-dark);
}

.button--secondary:hover,
.button--secondary:focus-visible {
    background: var(--color-bg-blue);
}

.button--light {
    background: #fff;
    color: var(--color-primary-dark);
    box-shadow: 0 16px 34px rgba(15, 23, 42, 0.16);
}

.hero__fade {
    animation: heroFadeIn 0.72s var(--ease-out) both;
    animation-delay: var(--hero-delay);
}

.hero__panel {
    position: relative;
    z-index: 1;
    min-height: 420px;
}

.code-card {
    position: absolute;
    right: 16px;
    top: 50%;
    width: min(100%, 390px);
    transform: translateY(-50%) rotate(-2deg);
    border: 1px solid rgba(37, 99, 235, 0.14);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.9);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(16px);
    padding: 24px;
}

.code-card__dot {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-accent);
    box-shadow:
        20px 0 0 var(--color-warning),
        40px 0 0 var(--color-success);
}

.code-card__label {
    margin: 28px 0 12px;
    color: var(--color-primary);
    font-size: 13px;
    font-weight: 900;
}

.code-card__code {
    overflow-x: auto;
    margin: 0;
    border-radius: var(--radius-sm);
    background: var(--color-navy);
    color: #dff7ff;
    padding: 18px;
    font-family: var(--font-code);
    font-size: 13px;
    line-height: 1.7;
}

.code-chip {
    position: absolute;
    z-index: 2;
    border: 1px solid rgba(37, 99, 235, 0.14);
    border-radius: 999px;
    background: #fff;
    color: var(--color-navy);
    box-shadow: var(--shadow-sm);
    padding: 9px 14px;
    font-family: var(--font-code);
    font-size: 13px;
    font-weight: 700;
}

.code-chip--one {
    top: 34px;
    right: 40px;
}

.code-chip--two {
    bottom: 58px;
    left: 0;
}

.code-chip--three {
    top: 124px;
    left: 12px;
}

.code-chip--four {
    right: 0;
    bottom: 18px;
}

.hero__decor,
.play-section__decor {
    position: absolute;
    z-index: -1;
    pointer-events: none;
}

.hero__decor--circle {
    right: -150px;
    top: 96px;
    width: 460px;
    height: 460px;
    border-radius: 50%;
    background: rgba(37, 99, 235, 0.09);
}

.hero__decor--square {
    left: -110px;
    bottom: 70px;
    width: 250px;
    height: 250px;
    transform: rotate(-16deg);
    border-radius: 34px;
    background: rgba(6, 182, 212, 0.11);
}

.hero__decor--dots,
.play-section__decor--dots {
    width: 180px;
    height: 180px;
    background-image: radial-gradient(
        rgba(37, 99, 235, 0.34) 1.5px,
        transparent 1.5px
    );
    background-size: 18px 18px;
}

.hero__decor--dots {
    right: 46%;
    bottom: 86px;
    opacity: 0.45;
}

.section {
    padding: 96px 0;
}

.section:nth-of-type(odd) {
    background: var(--color-bg);
}

.section:nth-of-type(even) {
    background: var(--color-bg-soft);
}

.section__inner {
    width: min(100% - 40px, var(--container));
    margin-inline: auto;
}

.section-heading {
    max-width: 720px;
    margin-bottom: 42px;
}

.section-heading--center {
    margin-inline: auto;
    text-align: center;
}

.section-heading__title {
    margin: 0;
    color: var(--color-navy);
    font-family: var(--font-heading);
    font-size: clamp(30px, 4vw, 48px);
    font-weight: 900;
    line-height: 1.32;
}

.section-heading__lead {
    margin: 18px 0 0;
    color: var(--color-muted);
    font-size: 16px;
}

.feature-grid,
.post-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}

.feature-card,
.post-card {
    display: flex;
    flex-direction: column;
    min-height: 100%;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: #fff;
    box-shadow: 0 1px 0 rgba(15, 23, 42, 0.02);
    padding: 24px;
    transition:
        transform 0.2s var(--ease-out),
        box-shadow 0.2s var(--ease-out),
        border-color 0.2s var(--ease-out);
}

.feature-card:hover,
.post-card:hover {
    transform: translateY(-4px);
    border-color: rgba(37, 99, 235, 0.26);
    box-shadow: var(--shadow-sm);
}

.feature-card--disabled {
    border-color: #edf1f6;
    background: #f8fafc;
    color: var(--color-muted);
}

.feature-card--disabled:hover {
    transform: none;
    border-color: #edf1f6;
    box-shadow: 0 1px 0 rgba(15, 23, 42, 0.02);
}

.feature-card--disabled .feature-card__icon {
    background: #eef2f7;
    color: #94a3b8;
}

.feature-card--disabled .feature-card__title {
    color: #475569;
}

.feature-card--disabled .feature-card__keywords span {
    background: #eef2f7;
    color: #94a3b8;
}

.feature-card__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    border-radius: 18px;
    background: var(--color-bg-blue);
    color: var(--color-primary-dark);
    font-family: var(--font-code);
    font-size: 13px;
    font-weight: 900;
}

.feature-card__title,
.post-card__title {
    margin: 20px 0 0;
    color: var(--color-navy);
    font-family: var(--font-heading);
    font-size: 21px;
    font-weight: 900;
    line-height: 1.48;
}

.feature-card__text,
.post-card__text {
    margin: 12px 0 0;
    color: var(--color-muted);
    font-size: 15px;
}

.feature-card__keywords,
.post-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 18px 0 0;
}

.feature-card__keywords span,
.post-card__tags span {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    border-radius: 999px;
    background: var(--color-bg-soft);
    color: var(--color-muted);
    padding: 0 10px;
    font-size: 12px;
    font-weight: 700;
}

.text-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: fit-content;
    margin-top: auto;
    padding-top: 22px;
    color: var(--color-primary);
    font-weight: 900;
}

.text-link::after {
    content: "";
    width: 7px;
    height: 7px;
    transform: rotate(45deg);
    border-top: 2px solid currentColor;
    border-right: 2px solid currentColor;
    transition: transform 0.2s var(--ease-out);
}

.text-link:hover::after,
.text-link:focus-visible::after {
    transform: translateX(4px) rotate(45deg);
}

.text-link--disabled {
    color: #94a3b8;
    cursor: default;
}

.text-link--disabled::after {
    display: none;
}

.problem-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.problem-list__item {
    display: flex;
    align-items: center;
    gap: 14px;
    min-height: 76px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: #fff;
    padding: 18px 20px;
    font-weight: 900;
    transition:
        transform 0.2s var(--ease-out),
        border-color 0.2s var(--ease-out),
        box-shadow 0.2s var(--ease-out);
}

.problem-list__item:hover,
.problem-list__item:focus-visible {
    transform: translateY(-2px);
    border-color: rgba(37, 99, 235, 0.28);
    box-shadow: var(--shadow-sm);
}

.problem-list__mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--color-bg-blue);
    color: var(--color-primary);
    font-family: var(--font-heading);
    font-weight: 900;
}

.post-card__meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    color: var(--color-muted);
    font-size: 12px;
    font-weight: 700;
}

.post-card__category {
    display: inline-flex;
    align-items: center;
    min-height: 26px;
    border-radius: 999px;
    background: var(--color-bg-blue);
    color: var(--color-primary-dark);
    padding: 0 10px;
}

.post-card__title a {
    transition: color 0.2s var(--ease-out);
}

.post-card__title a:hover,
.post-card__title a:focus-visible {
    color: var(--color-primary-dark);
}

.category-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
}

.category-tags__item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    border: 1px solid rgba(37, 99, 235, 0.18);
    border-radius: 999px;
    background: #fff;
    color: var(--color-navy);
    padding: 0 20px;
    font-weight: 900;
    transition:
        transform 0.2s var(--ease-out),
        background 0.2s var(--ease-out),
        color 0.2s var(--ease-out),
        border-color 0.2s var(--ease-out);
}

.category-tags__item:hover,
.category-tags__item:focus-visible {
    transform: translateY(-2px);
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: #fff;
}

.tool-banner {
    background: #fff;
}

.tool-banner__body {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    overflow: hidden;
    border: 1px solid rgba(37, 99, 235, 0.12);
    border-radius: var(--radius-md);
    background:
        linear-gradient(
            135deg,
            rgba(239, 246, 255, 0.96),
            rgba(255, 255, 255, 0.95)
        ),
        radial-gradient(
            circle at 92% 18%,
            rgba(6, 182, 212, 0.25),
            transparent 28%
        );
    padding: 42px;
}

.tool-banner__content {
    max-width: 720px;
}

.tool-banner__title {
    margin: 0;
    color: var(--color-navy);
    font-family: var(--font-heading);
    font-size: clamp(24px, 3vw, 36px);
    font-weight: 900;
    line-height: 1.42;
}

.tool-banner__text {
    margin: 16px 0 0;
    color: var(--color-muted);
}

.play-section {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    background:
        linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(135deg, #0f172a 0%, #1d4ed8 58%, #06b6d4 100%);
    background-size:
        54px 54px,
        54px 54px,
        auto;
    color: #fff;
    padding: 112px 0;
}

.play-section__inner {
    position: relative;
    z-index: 2;
    width: min(100% - 40px, 880px);
    margin-inline: auto;
    text-align: center;
}

.play-section__label {
    color: rgba(255, 255, 255, 0.78);
}

.play-section__title {
    margin: 0;
    font-family: var(--font-heading);
    font-size: clamp(30px, 4.5vw, 54px);
    font-weight: 900;
    line-height: 1.38;
}

.play-section__text {
    max-width: 760px;
    margin: 22px auto 34px;
    color: rgba(255, 255, 255, 0.82);
    font-size: 17px;
}

.play-section__decor--square {
    top: 40px;
    left: 7%;
    width: 190px;
    height: 190px;
    transform: rotate(-14deg);
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.06);
}

.play-section__decor--circle {
    right: 8%;
    bottom: -120px;
    width: 330px;
    height: 330px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
}

.play-section__decor--dots {
    left: 14%;
    bottom: 44px;
    background-image: radial-gradient(
        rgba(255, 255, 255, 0.32) 1.5px,
        transparent 1.5px
    );
    opacity: 0.65;
}

.site-footer {
    background: var(--color-navy);
    color: #fff;
    padding: 54px 0 28px;
}

.site-footer__inner {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    width: min(100% - 40px, var(--container));
    margin-inline: auto;
    gap: 40px;
}

.site-footer__brand {
    max-width: 360px;
}

.site-footer__logo {
    width: 160px;
    height: 48px;
    object-fit: contain;
}

.site-footer__description {
    margin: 18px 0 0;
    color: rgba(255, 255, 255, 0.72);
    font-size: 14px;
}

.site-footer__nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 12px 22px;
}

.site-footer__nav a {
    color: rgba(255, 255, 255, 0.78);
    font-size: 14px;
    font-weight: 700;
}

.site-footer__nav a:hover,
.site-footer__nav a:focus-visible {
    color: #fff;
}

.site-footer__copyright {
    width: min(100% - 40px, var(--container));
    margin: 38px auto 0;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    padding-top: 22px;
    color: rgba(255, 255, 255, 0.56);
    font-size: 13px;
}

.page-top {
    position: fixed;
    right: 22px;
    bottom: 22px;
    z-index: 90;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    transform: translateY(16px);
    border: 0;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 12px 30px rgba(37, 99, 235, 0.28);
    opacity: 0;
    visibility: hidden;
    transition:
        opacity 0.2s var(--ease-out),
        visibility 0.2s var(--ease-out),
        transform 0.2s var(--ease-out),
        background 0.2s var(--ease-out);
}

.page-top.is-visible {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.page-top:hover,
.page-top:focus-visible {
    background: var(--color-primary-dark);
}

.page-top__arrow {
    width: 12px;
    height: 12px;
    transform: translateY(3px) rotate(-45deg);
    border-top: 3px solid currentColor;
    border-right: 3px solid currentColor;
}

.js-scroll-reveal {
    transform: translateY(24px);
    opacity: 0;
    transition:
        opacity 0.58s var(--ease-out),
        transform 0.58s var(--ease-out);
}

.js-scroll-reveal.is-visible {
    transform: translateY(0);
    opacity: 1;
}

@keyframes heroFadeIn {
    from {
        transform: translateY(18px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@media (max-width: 960px) {
    .hero__inner {
        grid-template-columns: 1fr;
        min-height: auto;
        padding: 72px 0 88px;
    }

    .hero__panel {
        min-height: 300px;
    }

    .code-card {
        right: auto;
        left: 50%;
        width: min(100%, 430px);
        transform: translateX(-50%) rotate(-2deg);
    }

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

    .tool-banner__body {
        align-items: flex-start;
        flex-direction: column;
    }
}

@media (max-width: 760px) {
    :root {
        --header-height: 64px;
    }

    body {
        font-size: 16px;
    }

    .site-header__inner {
        width: min(100% - 28px, var(--container));
    }

    .site-header__logo {
        width: 128px;
        height: 38px;
    }

    .site-header__toggle {
        display: inline-flex;
        z-index: 102;
    }

    .global-nav {
        position: fixed;
        inset: var(--header-height) 0 auto 0;
        z-index: 101;
        transform: translateY(-12px);
        border-bottom: 1px solid var(--color-border);
        background: rgba(255, 255, 255, 0.98);
        box-shadow: 0 18px 32px rgba(15, 23, 42, 0.08);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition:
            opacity 0.22s var(--ease-out),
            transform 0.22s var(--ease-out),
            visibility 0.22s var(--ease-out);
    }

    body.is-menu-open .global-nav {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    .global-nav__list {
        display: grid;
        width: min(100% - 28px, var(--container));
        margin-inline: auto;
        padding: 14px 0 18px;
        gap: 6px;
    }

    .global-nav__link {
        width: 100%;
        justify-content: space-between;
        min-height: 48px;
        border-radius: var(--radius-sm);
        padding: 0 12px;
    }

    .hero__inner,
    .section__inner,
    .play-section__inner,
    .site-footer__inner,
    .site-footer__copyright {
        width: min(100% - 28px, var(--container));
    }

    .hero__inner {
        padding: 54px 0 64px;
        gap: 34px;
    }

    .hero__copy {
        margin-top: 24px;
    }

    .hero__lead {
        font-size: 16px;
        line-height: 1.9;
    }

    .hero__buttons {
        display: grid;
    }

    .button {
        width: 100%;
        min-height: 50px;
    }

    .hero__panel {
        min-height: 260px;
    }

    .code-card {
        padding: 18px;
    }

    .code-chip {
        display: none;
    }

    .hero__decor--circle {
        right: -160px;
        top: 80px;
        width: 300px;
        height: 300px;
    }

    .hero__decor--square {
        left: -130px;
        width: 210px;
        height: 210px;
    }

    .hero__decor--dots {
        right: -50px;
        bottom: 64px;
    }

    .section {
        padding: 72px 0;
    }

    .section-heading {
        margin-bottom: 30px;
    }

    .feature-grid,
    .post-grid,
    .problem-list {
        grid-template-columns: 1fr;
    }

    .feature-card,
    .post-card {
        padding: 22px;
    }

    .problem-list__item {
        min-height: 68px;
        padding: 16px;
    }

    .category-tags {
        justify-content: flex-start;
    }

    .category-tags__item {
        min-height: 44px;
        padding: 0 16px;
        font-size: 14px;
    }

    .tool-banner__body {
        border-radius: var(--radius-sm);
        padding: 28px 22px;
    }

    .play-section {
        padding: 84px 0;
    }

    .play-section__decor--square {
        left: -60px;
        width: 150px;
        height: 150px;
    }

    .play-section__decor--circle {
        right: -130px;
        width: 260px;
        height: 260px;
    }

    .site-footer__inner {
        flex-direction: column;
    }

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

    .page-top {
        right: 14px;
        bottom: 14px;
        width: 44px;
        height: 44px;
    }
}

/* Archive page */
.archive-hero {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(239, 246, 255, 0.96) 100%);
}

.archive-hero__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: min(100% - 40px, var(--container));
    margin: 0 auto;
    padding: 66px 0 74px;
    gap: 32px;
}

.archive-hero__content {
    position: relative;
    z-index: 2;
    max-width: 760px;
}

.archive-hero__label {
    margin: 0 0 12px;
    color: var(--color-primary);
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 900;
    text-transform: uppercase;
}

.archive-hero__title {
    margin: 0;
    color: var(--color-navy);
    font-family: var(--font-heading);
    font-size: clamp(34px, 5vw, 60px);
    font-weight: 900;
    line-height: 1.22;
}

.archive-hero__lead {
    max-width: 680px;
    margin: 20px 0 0;
    color: var(--color-muted);
    font-size: 17px;
    line-height: 1.95;
}

.archive-hero__chips {
    position: relative;
    z-index: 2;
    display: grid;
    gap: 14px;
    flex: 0 0 auto;
}

.archive-code-chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    border: 1px solid rgba(37, 99, 235, 0.18);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.92);
    color: var(--color-primary-dark);
    box-shadow: var(--shadow-sm);
    padding: 0 16px;
    font-family: var(--font-code);
    font-size: 13px;
    font-weight: 900;
}

.archive-code-chip--accent {
    transform: translateX(-28px);
    color: var(--color-navy);
}

.archive-hero__decor {
    position: absolute;
    z-index: -1;
    pointer-events: none;
}

.archive-hero__decor--circle {
    right: -90px;
    top: 34px;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    background: rgba(37, 99, 235, 0.08);
}

.archive-hero__decor--dots {
    right: 33%;
    bottom: 34px;
    width: 140px;
    height: 140px;
    background-image: radial-gradient(rgba(37, 99, 235, 0.28) 1.5px, transparent 1.5px);
    background-size: 18px 18px;
    opacity: 0.45;
}

.archive-filter {
    background: #fff;
    border-bottom: 1px solid var(--color-border);
    padding: 64px 0;
}

.archive-filter__inner {
    width: min(100% - 40px, var(--container));
    margin: 0 auto;
}

.archive-filter__nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

.archive-filter__item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    border: 1px solid rgba(37, 99, 235, 0.18);
    border-radius: 999px;
    background: #fff;
    color: var(--color-navy);
    padding: 0 18px;
    font-weight: 900;
    transition:
        transform 0.2s var(--ease-out),
        background 0.2s var(--ease-out),
        color 0.2s var(--ease-out),
        border-color 0.2s var(--ease-out);
}

.archive-filter__item:hover,
.archive-filter__item:focus-visible,
.archive-filter__item.is-current {
    transform: translateY(-2px);
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: #fff;
}

.archive-posts {
    background: var(--color-bg-soft);
}

.archive-posts__grid .post-card {
    min-height: 100%;
}

.archive-pagination {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-top: 44px;
}

.archive-pagination__item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: #fff;
    color: var(--color-navy);
    padding: 0 14px;
    font-weight: 900;
    transition:
        transform 0.2s var(--ease-out),
        background 0.2s var(--ease-out),
        color 0.2s var(--ease-out),
        border-color 0.2s var(--ease-out);
}

.archive-pagination__item:hover,
.archive-pagination__item:focus-visible,
.archive-pagination__item.is-current,
.archive-pagination__item.current {
    transform: translateY(-2px);
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: #fff;
}

.archive-pagination__item--prev,
.archive-pagination__item--next {
    min-width: 78px;
}

@media (max-width: 760px) {
    .archive-hero__inner,
    .archive-filter__inner {
        width: min(100% - 28px, var(--container));
    }

    .archive-hero__inner {
        align-items: flex-start;
        flex-direction: column;
        padding: 48px 0 58px;
    }

    .archive-hero__lead {
        font-size: 16px;
    }

    .archive-hero__chips {
        display: none;
    }

    .archive-hero__decor--circle {
        right: -130px;
        width: 240px;
        height: 240px;
    }

    .archive-filter {
        padding: 52px 0;
    }

    .archive-filter__nav {
        justify-content: flex-start;
    }

    .archive-filter__item {
        min-height: 42px;
        padding: 0 15px;
        font-size: 14px;
    }

    .archive-pagination {
        gap: 8px;
    }

    .archive-pagination__item {
        min-width: 40px;
        min-height: 40px;
        padding: 0 12px;
    }
}

@media (max-width: 420px) {
    .hero__title {
        font-size: 42px;
    }

    .hero__copy {
        font-size: 24px;
    }

    .post-card__meta {
        align-items: flex-start;
        flex-direction: column;
    }
}

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

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }

    .hero__fade,
    .js-scroll-reveal {
        transform: none !important;
        opacity: 1 !important;
    }
}

/* Article page */
.breadcrumb {
    background: var(--color-bg-soft);
    border-bottom: 1px solid var(--color-border);
}

.breadcrumb__list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    width: min(100% - 40px, var(--container));
    margin: 0 auto;
    padding: 14px 0;
    color: var(--color-muted);
    font-size: 13px;
    font-weight: 700;
    list-style: none;
}

.breadcrumb__item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.breadcrumb__item:not(:last-child)::after {
    content: ">";
    color: #94a3b8;
}

.breadcrumb__item a {
    color: var(--color-primary);
}

.breadcrumb__item a:hover,
.breadcrumb__item a:focus-visible {
    color: var(--color-primary-dark);
}

.article-hero {
    position: relative;
    isolation: isolate;
    overflow: hidden;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.96) 0%, rgba(239, 246, 255, 0.96) 70%, rgba(230, 252, 255, 0.82) 100%);
}

.article-hero__inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(300px, 0.55fr);
    align-items: center;
    width: min(100% - 40px, var(--container));
    margin: 0 auto;
    padding: 72px 0 80px;
    gap: 56px;
}

.article-hero__content,
.article-hero__panel {
    position: relative;
    z-index: 2;
}

.article-hero__category {
    display: inline-flex;
    align-items: center;
    min-height: 32px;
    margin: 0 0 18px;
    border-radius: 999px;
    background: var(--color-primary);
    color: #fff;
    padding: 0 14px;
    font-size: 13px;
    font-weight: 900;
}

.article-hero__title {
    margin: 0;
    color: var(--color-navy);
    font-family: var(--font-heading);
    font-size: clamp(36px, 5.5vw, 68px);
    font-weight: 900;
    line-height: 1.18;
    letter-spacing: 0;
}

.article-hero__lead {
    max-width: 760px;
    margin: 24px 0 0;
    color: var(--color-muted);
    font-size: 17px;
    line-height: 2;
}

.article-hero__meta,
.article-hero__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 16px;
    margin-top: 20px;
}

.article-hero__meta {
    color: var(--color-muted);
    font-size: 13px;
    font-weight: 700;
}

.article-hero__tags a {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    border: 1px solid rgba(37, 99, 235, 0.18);
    border-radius: 999px;
    background: #fff;
    color: var(--color-primary-dark);
    padding: 0 11px;
    font-size: 13px;
    font-weight: 800;
}

.article-hero__panel {
    min-height: 360px;
}

.code-card--article {
    right: 0;
    width: min(100%, 380px);
}

.article-flow-chip {
    position: absolute;
    z-index: 3;
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    border: 1px solid rgba(37, 99, 235, 0.18);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.94);
    color: var(--color-primary-dark);
    box-shadow: var(--shadow-sm);
    padding: 0 13px;
    font-size: 13px;
    font-weight: 900;
    white-space: nowrap;
}

.article-flow-chip--one {
    left: 8px;
    top: 68px;
}

.article-flow-chip--two {
    right: 10px;
    top: 22px;
}

.article-flow-chip--three {
    right: 18px;
    bottom: 24px;
}

.article-hero__decor {
    position: absolute;
    z-index: -1;
    pointer-events: none;
}

.article-hero__decor--circle {
    right: -130px;
    top: 70px;
    width: 360px;
    height: 360px;
    border-radius: 50%;
    background: rgba(37, 99, 235, 0.08);
}

.article-hero__decor--square {
    left: -90px;
    bottom: 50px;
    width: 190px;
    height: 190px;
    transform: rotate(-14deg);
    border-radius: 28px;
    background: rgba(6, 182, 212, 0.1);
}

.article-hero__decor--dots {
    right: 42%;
    bottom: 48px;
    width: 150px;
    height: 150px;
    background-image: radial-gradient(rgba(37, 99, 235, 0.28) 1.5px, transparent 1.5px);
    background-size: 18px 18px;
    opacity: 0.5;
}

.article-layout {
    display: grid;
    grid-template-columns: minmax(0, 800px) 240px;
    align-items: start;
    width: min(100% - 40px, var(--container));
    margin: 0 auto;
    padding: 88px 0 72px;
    gap: 56px;
}

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

.article-body__intro {
    margin: 0 0 36px;
    color: var(--color-text);
    font-size: 18px;
    font-weight: 500;
    line-height: 2.05;
}

.article-body section + section {
    margin-top: 72px;
}

.article-body p {
    margin: 18px 0 0;
}

.article-body h2 {
    position: relative;
    overflow: hidden;
    margin: 0 0 26px;
    border-radius: var(--radius-md);
    background:
        radial-gradient(circle at 94% 24%, rgba(37, 99, 235, 0.12) 1.5px, transparent 1.5px),
        var(--color-bg-blue);
    background-size: 18px 18px, auto;
    color: var(--color-navy);
    font-family: var(--font-heading);
    font-size: clamp(27px, 3.2vw, 38px);
    font-weight: 900;
    line-height: 1.42;
    padding: 26px 28px 26px 34px;
}

.article-body h2::before {
    content: "";
    position: absolute;
    inset: 18px auto 18px 0;
    width: 7px;
    border-radius: 999px;
    background: linear-gradient(180deg, var(--color-primary), var(--color-accent));
}

.article-body h3 {
    position: relative;
    margin: 42px 0 16px;
    color: var(--color-navy);
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 900;
    line-height: 1.45;
    padding: 0 0 12px 18px;
}

.article-body h3::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.32em;
    width: 5px;
    height: 1.2em;
    border-radius: 999px;
    background: var(--color-primary);
}

.article-body h3::after {
    content: "";
    position: absolute;
    left: 18px;
    right: 0;
    bottom: 0;
    height: 1px;
    background: linear-gradient(90deg, rgba(37, 99, 235, 0.35), rgba(6, 182, 212, 0));
}

.article-body h4 {
    margin: 28px 0 8px;
    color: var(--color-navy);
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 900;
}

.article-body h4::before {
    content: "#";
    margin-right: 7px;
    color: var(--color-accent);
    font-family: var(--font-code);
}

.article-body code:not(pre code) {
    border: 1px solid rgba(37, 99, 235, 0.14);
    border-radius: 6px;
    background: var(--color-bg-blue);
    color: var(--color-primary-dark);
    padding: 0.1em 0.35em;
    font-family: var(--font-code);
    font-size: 0.92em;
}

.article-learn-card,
.article-note,
.article-demo,
.codepen-placeholder,
.mistake-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: #fff;
}

.article-learn-card {
    background: linear-gradient(135deg, var(--color-bg-blue), #fff);
    padding: 24px 26px;
}

.article-learn-card ul {
    display: grid;
    gap: 10px;
    margin: 0;
    padding-left: 1.3em;
}

.article-demo {
    margin-top: 26px;
    background: var(--color-bg-soft);
    padding: 24px;
}

.article-demo__label {
    margin: 0 0 12px;
    color: var(--color-primary);
    font-weight: 900;
}

.article-demo__list {
    display: grid;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.article-demo__list li {
    border-radius: var(--radius-sm);
    background: #fff;
    padding: 10px 12px;
}

.article-demo__list .is-muted {
    color: var(--color-muted);
    border: 1px dashed rgba(37, 99, 235, 0.3);
}

.article-demo__hidden {
    display: none;
}

.article-demo__list.is-open .article-demo__hidden {
    display: block;
}

.article-demo__button {
    margin-top: 16px;
    border: 0;
    border-radius: 999px;
    background: var(--color-primary);
    color: #fff;
    padding: 11px 18px;
    font-weight: 900;
}

.article-note {
    position: relative;
    margin-top: 28px;
    padding: 20px 22px 20px 24px;
}

.article-note::before {
    content: "";
    position: absolute;
    left: 0;
    top: 18px;
    bottom: 18px;
    width: 5px;
    border-radius: 999px;
    background: var(--color-primary);
}

.article-note p {
    margin: 0;
}

.article-note--point {
    background: var(--color-bg-blue);
}

.article-note--warning {
    background: #fffbeb;
}

.article-note--warning::before {
    background: var(--color-warning);
}

.article-note--css {
    background: #ecfeff;
}

.article-note--css::before {
    background: var(--color-accent);
}

.code-block {
    position: relative;
    overflow: hidden;
    margin: 30px 0;
    border: 1px solid rgba(15, 23, 42, 0.12);
    border-radius: var(--radius-sm);
    background: var(--color-navy);
}

.code-block::before {
    content: attr(data-file);
    display: block;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.06);
    color: rgba(255, 255, 255, 0.72);
    padding: 10px 16px;
    font-family: var(--font-code);
    font-size: 12px;
    font-weight: 700;
}

.code-block pre {
    overflow-x: auto;
    margin: 0;
    padding: 20px;
}

.code-block code {
    color: #dff7ff;
    font-family: var(--font-code);
    font-size: 14px;
    line-height: 1.8;
    white-space: pre;
}

.codepen-placeholder {
    display: grid;
    place-items: center;
    min-height: 260px;
    margin-top: 26px;
    background:
        linear-gradient(135deg, rgba(239, 246, 255, 0.92), rgba(255, 255, 255, 0.96)),
        radial-gradient(circle at 20% 22%, rgba(6, 182, 212, 0.14), transparent 28%);
    padding: 32px;
    text-align: center;
}

.codepen-placeholder__title {
    margin: 0;
    color: var(--color-navy);
    font-family: var(--font-heading);
    font-size: 22px;
    font-weight: 900;
}

.codepen-placeholder__text {
    max-width: 520px;
    margin: 12px auto 0;
    color: var(--color-muted);
}

.mistake-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    margin-top: 26px;
}

.mistake-card {
    padding: 22px;
}

.mistake-card h3 {
    margin: 0 0 10px;
    padding: 0;
    font-size: 19px;
}

.mistake-card h3::before,
.mistake-card h3::after {
    content: none;
}

.mistake-card p {
    margin: 0;
    color: var(--color-muted);
    font-size: 15px;
}

.mistake-card__example {
    overflow-x: auto;
    margin: 16px 0 0;
    border-radius: var(--radius-sm);
    background: var(--color-navy);
    color: #dff7ff;
    padding: 14px;
    font-family: var(--font-code);
    font-size: 12px;
    line-height: 1.65;
}

.article-toc {
    position: sticky;
    top: calc(var(--header-height) + 24px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: #fff;
    box-shadow: var(--shadow-sm);
    padding: 20px;
}

.article-toc__title {
    margin: 0 0 12px;
    color: var(--color-navy);
    font-family: var(--font-heading);
    font-weight: 900;
}

.article-toc__list {
    display: grid;
    gap: 7px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.article-toc__list a {
    display: block;
    border-radius: 6px;
    color: var(--color-muted);
    padding: 6px 8px;
    font-size: 13px;
    font-weight: 700;
    line-height: 1.5;
}

.article-toc__list a:hover,
.article-toc__list a:focus-visible {
    background: var(--color-bg-blue);
    color: var(--color-primary-dark);
}

.article-next-cta {
    background: var(--color-bg-soft);
    padding: 24px 0 88px;
}

.article-next-cta__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 28px;
    width: min(100% - 40px, var(--container));
    margin: 0 auto;
    border: 1px solid rgba(37, 99, 235, 0.14);
    border-radius: var(--radius-md);
    background: #fff;
    box-shadow: var(--shadow-sm);
    padding: 34px;
}

.article-next-cta__label {
    margin: 0 0 10px;
    color: var(--color-primary);
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 900;
}

.article-next-cta__title {
    margin: 0;
    color: var(--color-navy);
    font-family: var(--font-heading);
    font-size: clamp(24px, 3vw, 34px);
    font-weight: 900;
    line-height: 1.42;
}

.article-next-cta__text {
    max-width: 700px;
    margin: 12px 0 0;
    color: var(--color-muted);
}

.related-posts {
    background: #fff;
}

.article-category-nav {
    background: var(--color-bg-soft);
}

.tool-banner__body--compact {
    padding-block: 34px;
}

@media (max-width: 960px) {
    .article-hero__inner {
        grid-template-columns: 1fr;
        padding: 60px 0 70px;
        gap: 36px;
    }

    .article-hero__panel {
        min-height: 300px;
    }

    .article-layout {
        grid-template-columns: 1fr;
        gap: 34px;
    }

    .article-toc {
        position: static;
        order: -1;
    }

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

@media (max-width: 760px) {
    .breadcrumb__list,
    .article-hero__inner,
    .article-layout,
    .article-next-cta__inner {
        width: min(100% - 28px, var(--container));
    }

    .breadcrumb__list {
        font-size: 12px;
    }

    .article-hero__inner {
        padding: 46px 0 56px;
    }

    .article-hero__title {
        font-size: 34px;
    }

    .article-hero__lead {
        font-size: 16px;
        line-height: 1.9;
    }

    .article-hero__panel {
        min-height: 250px;
    }

    .article-flow-chip {
        display: none;
    }

    .article-layout {
        padding: 62px 0 56px;
    }

    .article-body__intro {
        font-size: 16px;
    }

    .article-body section + section {
        margin-top: 56px;
    }

    .article-body h2 {
        border-radius: var(--radius-sm);
        font-size: 25px;
        padding: 22px 20px 22px 26px;
    }

    .article-body h3 {
        font-size: 21px;
    }

    .article-toc__list,
    .mistake-grid {
        grid-template-columns: 1fr;
    }

    .code-block pre {
        padding: 16px;
    }

    .code-block code {
        font-size: 13px;
    }

    .codepen-placeholder {
        min-height: 220px;
        padding: 24px 18px;
    }

    .article-next-cta {
        padding-bottom: 70px;
    }

    .article-next-cta__inner {
        align-items: flex-start;
        flex-direction: column;
        border-radius: var(--radius-sm);
        padding: 26px 22px;
    }
}

/* 404 Viewport Lab */
.not-found-page {
    background:
        radial-gradient(circle at 14% 18%, rgba(6, 182, 212, 0.16) 0 90px, transparent 91px),
        linear-gradient(180deg, #fff 0%, var(--color-bg-blue) 100%);
}

.not-found-hero {
    position: relative;
    display: grid;
    min-height: calc(100svh - var(--header-height));
    min-height: calc(100dvh - var(--header-height));
    overflow: hidden;
}

@supports not (height: 100dvh) {
    .not-found-hero {
        min-height: calc((var(--wdjs-vh, 1vh) * 100) - var(--header-height));
    }
}

.not-found-hero::before,
.not-found-hero::after {
    content: "";
    position: absolute;
    pointer-events: none;
}

.not-found-hero::before {
    right: -90px;
    top: 10%;
    width: 280px;
    height: 280px;
    border: 38px solid rgba(37, 99, 235, 0.09);
    border-radius: 50%;
}

.not-found-hero::after {
    left: 8%;
    bottom: 16%;
    width: 170px;
    height: 170px;
    transform: rotate(-14deg);
    border-radius: 24px;
    background:
        radial-gradient(circle, rgba(37, 99, 235, 0.18) 2px, transparent 2px) 0 0 / 18px 18px,
        rgba(255, 255, 255, 0.4);
}

.not-found-hero__inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 0.8fr);
    align-items: center;
    width: min(100% - 40px, var(--container));
    margin-inline: auto;
    padding: 56px 0 86px;
    gap: 52px;
}

.not-found-hero__label {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    margin: 0 0 20px;
    border: 1px solid rgba(37, 99, 235, 0.18);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.78);
    color: var(--color-primary-dark);
    padding: 0 14px;
    font-size: 13px;
    font-weight: 900;
}

.not-found-hero__title {
    max-width: 680px;
    margin: 0;
    color: var(--color-navy);
    font-family: var(--font-heading);
    font-size: clamp(36px, 6vw, 76px);
    font-weight: 900;
    line-height: 1.18;
}

.not-found-hero__text {
    max-width: 660px;
    margin: 24px 0 0;
    color: var(--color-muted);
    font-size: 17px;
    line-height: 2;
}

.not-found-hero__visual {
    position: relative;
}

.not-found-hero__visual::before {
    content: "100dvh";
    position: absolute;
    right: -8px;
    top: -18px;
    z-index: 2;
    border-radius: 999px;
    background: var(--color-accent);
    color: #fff;
    padding: 6px 12px;
    font-family: var(--font-code);
    font-size: 12px;
    font-weight: 900;
}

.not-found-hero__code {
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(37, 99, 235, 0.16);
    border-radius: var(--radius-md);
    background: rgba(15, 23, 42, 0.96);
    color: #dbeafe;
    box-shadow: var(--shadow-md);
}

.not-found-hero__code::before {
    content: attr(data-file);
    display: flex;
    align-items: center;
    min-height: 42px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.04);
    color: #93c5fd;
    padding: 0 18px;
    font-family: var(--font-code);
    font-size: 12px;
    font-weight: 700;
}

.not-found-hero__code pre {
    margin: 0;
    overflow-x: auto;
    padding: 24px;
}

.not-found-hero__code code {
    font-family: var(--font-code);
    font-size: 14px;
    line-height: 1.8;
}

.not-found-scroll {
    position: absolute;
    left: 50%;
    bottom: 24px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    transform: translateX(-50%);
    color: var(--color-primary-dark);
    font-family: var(--font-heading);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0.12em;
}

.not-found-scroll__line {
    display: block;
    width: 1px;
    height: 38px;
    margin-top: 8px;
    background: linear-gradient(180deg, var(--color-primary), transparent);
}

.not-found-links {
    background: #fff;
    padding: 92px 0 104px;
}

.not-found-links__grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-top: 36px;
}

.not-found-links__card {
    display: flex;
    flex-direction: column;
    min-height: 190px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: #fff;
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition:
        transform 0.2s var(--ease-out),
        border-color 0.2s var(--ease-out),
        box-shadow 0.2s var(--ease-out);
}

.not-found-links__card:hover,
.not-found-links__card:focus-visible {
    transform: translateY(-4px);
    border-color: rgba(37, 99, 235, 0.36);
    box-shadow: var(--shadow-md);
}

.not-found-links__label {
    width: fit-content;
    margin-bottom: 18px;
    border-radius: 999px;
    background: var(--color-bg-blue);
    color: var(--color-primary-dark);
    padding: 4px 10px;
    font-family: var(--font-code);
    font-size: 12px;
    font-weight: 900;
}

.not-found-links__card strong {
    color: var(--color-navy);
    font-family: var(--font-heading);
    font-size: 21px;
    line-height: 1.5;
}

.not-found-links__card span:last-child {
    margin-top: 12px;
    color: var(--color-muted);
    font-size: 14px;
    line-height: 1.8;
}

@media (max-width: 960px) {
    .not-found-hero__inner {
        grid-template-columns: 1fr;
        gap: 34px;
    }

    .not-found-hero__visual {
        max-width: 620px;
    }

    .not-found-links__grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 760px) {
    .not-found-hero__inner {
        width: min(100% - 28px, var(--container));
        padding: 42px 0 76px;
    }

    .not-found-hero::before {
        right: -132px;
        top: 5%;
    }

    .not-found-hero::after {
        display: none;
    }

    .not-found-hero__title {
        font-size: clamp(34px, 12vw, 48px);
    }

    .not-found-hero__text {
        margin-top: 18px;
        font-size: 15px;
        line-height: 1.9;
    }

    .not-found-hero__code pre {
        padding: 18px;
    }

    .not-found-hero__code code {
        font-size: 12px;
    }

    .not-found-scroll {
        bottom: 16px;
    }

    .not-found-links {
        padding: 68px 0 76px;
    }
}

@media (max-width: 760px) {
    .hero__inner,
    .article-hero__inner {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .hero__panel,
    .article-hero__panel {
        width: 100%;
        min-height: auto;
        padding: 0;
    }

    .code-card--main,
    .code-card--article {
        display: none;
    }

    .code-chip,
    .article-flow-chip {
        display: none;
    }
}

/* Article: FAQ accordion demo */
.article-step-list {
    display: grid;
    gap: 8px;
    margin: 20px 0;
    padding-left: 1.6em;
}

.article-step-list li {
    padding-left: 0.25em;
}

.article-step-list li::marker {
    color: var(--color-primary);
    font-weight: 900;
}

.article-faq-demo .faq-container {
    overflow: hidden;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: #fff;
}

.article-faq-demo .faq-item + .faq-item {
    border-top: 1px solid var(--color-border);
}

.article-faq-demo .faq-question {
    margin: 0;
}

.article-faq-demo .faq-question::before,
.article-faq-demo .faq-question::after {
    content: none;
}

.article-faq-demo .faq-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    width: 100%;
    border: 0;
    background: transparent;
    padding: 18px 20px;
    color: var(--color-navy);
    font: inherit;
    font-weight: 700;
    line-height: 1.7;
    text-align: left;
    cursor: pointer;
}

.article-faq-demo .faq-trigger:hover {
    background: var(--color-bg-soft);
}

.article-faq-demo .faq-trigger:focus-visible {
    position: relative;
    z-index: 1;
    outline: 3px solid rgba(37, 99, 235, 0.35);
    outline-offset: -3px;
}

.article-faq-demo .faq-icon {
    position: relative;
    flex: 0 0 auto;
    width: 20px;
    height: 20px;
}

.article-faq-demo .faq-icon::before,
.article-faq-demo .faq-icon::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 2px;
    border-radius: 999px;
    background: var(--color-primary);
    transform: translate(-50%, -50%);
    transition: transform 0.25s ease;
}

.article-faq-demo .faq-icon::after {
    transform: translate(-50%, -50%) rotate(90deg);
}

.article-faq-demo
    .faq-trigger[aria-expanded="true"]
    .faq-icon::after {
    transform: translate(-50%, -50%) rotate(0deg);
}

.article-faq-demo .faq-panel {
    padding: 0 20px 20px;
    color: var(--color-muted);
}

.article-faq-demo .faq-panel p {
    margin: 0;
}

@media (max-width: 760px) {
    .article-faq-demo .faq-trigger {
        gap: 14px;
        padding: 16px;
    }

    .article-faq-demo .faq-panel {
        padding: 0 16px 16px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .article-faq-demo .faq-icon::before,
    .article-faq-demo .faq-icon::after {
        transition: none;
    }
}

/* Article: hamburger menu demo */
.article-hamburger-demo {
    overflow: hidden;
}

.article-hamburger-demo .hamburger-demo__screen {
    position: relative;
    isolation: isolate;
    width: min(100%, 440px);
    min-height: 360px;
    overflow: hidden;
    margin-inline: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-blue);
    box-shadow: var(--shadow-sm);
}

.article-hamburger-demo .hamburger-demo__header {
    position: relative;
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 72px;
    padding: 12px 16px 12px 20px;
}

.article-hamburger-demo .hamburger-demo__logo {
    color: var(--color-navy);
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 900;
    letter-spacing: 0;
    transition: color 0.25s ease;
}

.article-hamburger-demo .hamburger-demo__button {
    position: relative;
    z-index: 3;
    display: flex;
    flex: 0 0 auto;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    width: 48px;
    height: 48px;
    border: 1px solid rgba(15, 23, 42, 0.08);
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 8px 22px rgba(15, 23, 42, 0.12);
    cursor: pointer;
}

.article-hamburger-demo .hamburger-demo__button:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.45);
    outline-offset: 3px;
}

.article-hamburger-demo .hamburger-demo__line {
    display: block;
    width: 23px;
    height: 2px;
    border-radius: 999px;
    background: var(--color-navy);
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.article-hamburger-demo .hamburger-demo__content {
    display: grid;
    min-height: 288px;
    place-items: center;
    padding: 44px 24px 72px;
    text-align: center;
}

.article-hamburger-demo .hamburger-demo__content p {
    max-width: 250px;
    margin: 0;
    color: var(--color-muted);
    font-size: 14px;
}

.article-hamburger-demo .hamburger-demo__nav {
    position: absolute;
    inset: 0;
    z-index: 2;
    display: grid;
    place-items: center;
    background: rgba(15, 23, 42, 0.97);
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
    transform: scale(0.985);
    transition:
        opacity 0.25s ease,
        visibility 0.25s ease,
        transform 0.25s ease;
}

.article-hamburger-demo .hamburger-demo__nav-list {
    display: grid;
    gap: 16px;
    width: min(100%, 260px);
    margin: 0;
    padding: 76px 24px 24px;
    list-style: none;
    text-align: center;
}

.article-hamburger-demo .hamburger-demo__nav-list a {
    display: block;
    border-bottom: 1px solid rgba(255, 255, 255, 0.18);
    padding: 10px 8px;
    color: #fff;
    font-size: 17px;
    font-weight: 700;
    text-decoration: none;
}

.article-hamburger-demo .hamburger-demo__nav-list a:hover {
    color: var(--color-accent);
}

.article-hamburger-demo .hamburger-demo__nav-list a:focus-visible {
    outline: 3px solid #fff;
    outline-offset: 4px;
}

.article-hamburger-demo.is-open .hamburger-demo__logo {
    color: #fff;
}

.article-hamburger-demo.is-open .hamburger-demo__nav {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
    transform: scale(1);
}

.article-hamburger-demo.is-open
    .hamburger-demo__line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.article-hamburger-demo.is-open
    .hamburger-demo__line:nth-child(2) {
    opacity: 0;
}

.article-hamburger-demo.is-open
    .hamburger-demo__line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 760px) {
    .article-hamburger-demo {
        padding-inline: 16px;
    }

    .article-hamburger-demo .hamburger-demo__screen {
        min-height: 330px;
    }

    .article-hamburger-demo .hamburger-demo__content {
        min-height: 258px;
        padding-inline: 18px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .article-hamburger-demo .hamburger-demo__logo,
    .article-hamburger-demo .hamburger-demo__line,
    .article-hamburger-demo .hamburger-demo__nav {
        transition: none;
    }
}

/* Article: tabs demo */
.article-tabs-demo {
    overflow: hidden;
}

.article-tabs-demo .article-tabs-demo__list {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 4px;
    border-bottom: 2px solid var(--color-border);
}

.article-tabs-demo .article-tabs-demo__tab {
    min-width: 0;
    border: 0;
    border-radius: 6px 6px 0 0;
    background: var(--color-bg-soft);
    padding: 12px 16px;
    color: var(--color-muted);
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.article-tabs-demo .article-tabs-demo__tab:hover {
    background: var(--color-bg-blue);
    color: var(--color-primary-dark);
}

.article-tabs-demo
    .article-tabs-demo__tab[aria-selected="true"] {
    background: var(--color-primary);
    color: #fff;
}

.article-tabs-demo .article-tabs-demo__tab:focus-visible {
    position: relative;
    z-index: 1;
    outline: 3px solid rgba(37, 99, 235, 0.42);
    outline-offset: 3px;
}

.article-tabs-demo .article-tabs-demo__panel {
    min-height: 140px;
    border: 1px solid var(--color-border);
    border-top: 0;
    background: #fff;
    padding: 28px 24px;
}

.article-tabs-demo .article-tabs-demo__panel p {
    margin: 0;
}

.article-tabs-demo .article-tabs-demo__panel:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.35);
    outline-offset: -3px;
}

.article-tabs-demo .article-tabs-demo__panel[hidden] {
    display: none;
}

@media (max-width: 480px) {
    .article-tabs-demo .article-tabs-demo__tab {
        padding: 12px 8px;
        font-size: 14px;
    }

    .article-tabs-demo .article-tabs-demo__panel {
        min-height: 126px;
        padding: 22px 18px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .article-tabs-demo .article-tabs-demo__tab {
        transition: none;
    }
}

/* Article: modal demo */
.article-modal-demo {
    position: relative;
}

.article-modal-demo__open,
.article-modal-dialog__button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    border: 0;
    border-radius: 999px;
    background: var(--color-primary);
    color: #fff;
    padding: 11px 20px;
    font: inherit;
    font-weight: 900;
    cursor: pointer;
}

.article-modal-demo__open:hover,
.article-modal-dialog__button:hover {
    background: var(--color-primary-dark);
}

.article-modal-dialog {
    width: min(calc(100% - 32px), 520px);
    max-width: 520px;
    max-height: min(80vh, 640px);
    max-height: min(80dvh, 640px);
    overflow: auto;
    margin: auto;
    border: 0;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--color-text);
    padding: 0;
    box-shadow: var(--shadow-sm);
}

.article-modal-dialog::backdrop {
    background: rgba(15, 23, 42, 0.72);
}

.article-modal-dialog__content {
    position: relative;
    min-height: 260px;
    border: 1px solid rgba(37, 99, 235, 0.12);
    border-radius: var(--radius-md);
    background: #fff;
    padding: 48px 38px 36px;
}

.article-modal-dialog__label {
    margin: 0 0 10px;
    color: var(--color-primary);
    font-family: var(--font-code);
    font-size: 13px;
    font-weight: 800;
}

.article-modal-dialog h3 {
    margin: 0 52px 14px 0;
    padding: 0;
    color: var(--color-navy);
    font-size: 24px;
}

.article-modal-dialog h3::before,
.article-modal-dialog h3::after {
    content: none;
}

.article-modal-dialog__content > p:not(.article-modal-dialog__label) {
    margin: 0 0 24px;
    color: var(--color-muted);
}

.article-modal-dialog__close {
    position: absolute;
    top: 16px;
    right: 16px;
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border: 0;
    border-radius: 50%;
    background: var(--color-bg-soft);
    color: var(--color-navy);
    padding: 0;
    font-size: 26px;
    line-height: 1;
    cursor: pointer;
}

.article-modal-dialog__close:hover {
    background: var(--color-bg-blue);
    color: var(--color-primary-dark);
}

.article-modal-demo__open:focus-visible,
.article-modal-dialog__close:focus-visible,
.article-modal-dialog__button:focus-visible {
    outline: 3px solid rgba(37, 99, 235, 0.45);
    outline-offset: 3px;
}

@media (max-width: 480px) {
    .article-modal-dialog {
        width: calc(100% - 24px);
        max-height: calc(100vh - 24px);
        max-height: calc(100dvh - 24px);
        border-radius: var(--radius-sm);
    }

    .article-modal-dialog__content {
        min-height: 240px;
        border-radius: var(--radius-sm);
        padding: 58px 20px 28px;
    }

    .article-modal-dialog h3 {
        margin-right: 0;
        font-size: 21px;
    }

    .article-modal-dialog__close {
        width: 48px;
        height: 48px;
    }
}