:root {
    --background: #f3f7fb;
    --background-accent: #e4eefc;
    --surface: rgba(255, 255, 255, 0.84);
    --surface-strong: #ffffff;
    --text: #132031;
    --muted: #576579;
    --line: #d7e1ec;
    --shadow: 0 24px 60px rgba(19, 32, 49, 0.12);
    --shadow-soft: 0 12px 30px rgba(19, 32, 49, 0.08);
    --accent: #0f62fe;
    --accent-strong: #0a4fd1;
    --accent-soft: #deebff;
    --success: #087443;
    --success-soft: #dcfce7;
    --error: #b42318;
    --error-soft: #fee4e2;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--text);
    font-family: Bahnschrift, "Aptos", "Segoe UI", sans-serif;
    background:
        radial-gradient(circle at top left, rgba(15, 98, 254, 0.12), transparent 28%),
        radial-gradient(circle at top right, rgba(0, 183, 195, 0.12), transparent 24%),
        linear-gradient(180deg, var(--background-accent) 0%, var(--background) 20%, #f8fbfe 100%);
}

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

button {
    font: inherit;
}

.container {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}

.site-nav {
    position: sticky;
    top: 0;
    z-index: 10;
    border-bottom: 1px solid rgba(215, 225, 236, 0.9);
    background: rgba(255, 255, 255, 0.78);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    min-height: 72px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.brand-logo {
    display: block;
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 18px;
}

.nav-link {
    color: var(--muted);
    font-weight: 600;
    transition: color 0.2s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
    color: var(--accent);
}

.github-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.92);
    box-shadow: var(--shadow-soft);
    color: var(--muted);
    transition:
        transform 0.2s ease,
        color 0.2s ease,
        border-color 0.2s ease;
}

.github-link:hover,
.github-link:focus-visible {
    transform: translateY(-1px);
    color: var(--text);
    border-color: rgba(15, 98, 254, 0.35);
}

.hero {
    padding: 84px 0 72px;
}

.hero-panel {
    text-align: center;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    border: 1px solid rgba(15, 98, 254, 0.18);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.74);
    color: var(--muted);
    font-size: 0.95rem;
    font-weight: 600;
}

.hero-title {
    margin: 22px auto 20px;
    max-width: 860px;
    font-size: clamp(3rem, 5vw, 5rem);
    line-height: 0.95;
    letter-spacing: -0.06em;
}

.gradient-text {
    background: linear-gradient(120deg, #0f62fe 0%, #0aa6c2 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-copy {
    margin: 0 auto 32px;
    max-width: 760px;
    color: var(--muted);
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: stretch;
    gap: 16px;
    margin-bottom: 12px;
}

.primary-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    min-height: 62px;
    padding: 0 28px;
    border-radius: 18px;
    background: linear-gradient(135deg, var(--accent) 0%, #2f83ff 100%);
    color: #ffffff;
    font-weight: 700;
    box-shadow: 0 18px 32px rgba(15, 98, 254, 0.24);
    transition:
        transform 0.2s ease,
        box-shadow 0.2s ease,
        background 0.2s ease;
}

.primary-button:hover,
.primary-button:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 22px 38px rgba(15, 98, 254, 0.28);
    background: linear-gradient(135deg, var(--accent-strong) 0%, #226fe3 100%);
}

.command-button {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    min-height: 62px;
    max-width: 100%;
    padding: 0 20px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.9);
    color: var(--text);
    cursor: pointer;
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.8),
        var(--shadow-soft);
    transition:
        transform 0.2s ease,
        border-color 0.2s ease,
        box-shadow 0.2s ease;
}

.command-button:hover,
.command-button:focus-visible {
    transform: translateY(-2px);
    border-color: rgba(15, 98, 254, 0.35);
    box-shadow:
        inset 0 1px 0 rgba(255, 255, 255, 0.8),
        0 18px 34px rgba(19, 32, 49, 0.12);
}

.command-button:disabled {
    cursor: progress;
    opacity: 0.86;
}

.command-content {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.command-text {
    min-width: 0;
    overflow-wrap: anywhere;
    text-align: left;
    color: #29384a;
    font-family: Consolas, "Cascadia Code", monospace;
    font-size: 0.95rem;
}

.command-prefix {
    color: #7b8794;
}

.command-icon {
    flex-shrink: 0;
    color: #6f7a88;
}

.command-tooltip {
    position: absolute;
    top: -42px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 10px;
    border-radius: 999px;
    background: #132031;
    color: #ffffff;
    font-size: 0.78rem;
    font-weight: 600;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.command-button:hover .command-tooltip,
.command-button:focus-visible .command-tooltip {
    opacity: 1;
}

.copy-status {
    min-height: 24px;
    margin: 0 0 48px;
    color: var(--muted);
    font-size: 0.95rem;
    font-weight: 600;
}

.copy-status.is-success {
    color: var(--success);
}

.copy-status.is-error {
    color: var(--error);
}

.video-shell {
    position: relative;
    overflow: hidden;
    max-width: 1040px;
    margin: 0 auto;
    border: 1px solid rgba(215, 225, 236, 0.9);
    border-radius: 28px;
    background: var(--surface-strong);
    box-shadow: var(--shadow);
}

.video-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(180deg, transparent 0%, rgba(19, 32, 49, 0.1) 100%);
}

.video-player {
    display: block;
    width: 100%;
    height: auto;
}

.section {
    padding: 84px 0;
    border-top: 1px solid rgba(215, 225, 236, 0.9);
    background: rgba(255, 255, 255, 0.72);
}

.section-alt {
    background: linear-gradient(180deg, rgba(230, 240, 252, 0.58) 0%, rgba(255, 255, 255, 0.86) 100%);
}

.section-header {
    max-width: 680px;
    margin: 0 auto 48px;
    text-align: center;
}

.section-title {
    margin: 0 0 14px;
    font-size: clamp(2rem, 3vw, 2.8rem);
    letter-spacing: -0.04em;
}

.section-copy {
    margin: 0;
    color: var(--muted);
    font-size: 1.1rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    margin-bottom: 28px;
}

.resource-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.resource-card {
    display: block;
    padding: 28px;
    border: 1px solid rgba(215, 225, 236, 0.92);
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow-soft);
    transition:
        transform 0.2s ease,
        border-color 0.2s ease,
        box-shadow 0.2s ease;
}

.resource-card:hover,
.resource-card:focus-visible {
    transform: translateY(-2px);
    border-color: rgba(15, 98, 254, 0.26);
    box-shadow: 0 18px 34px rgba(19, 32, 49, 0.12);
}

.resource-title {
    margin: 0 0 12px;
    font-size: 1.2rem;
    letter-spacing: -0.03em;
}

.resource-copy {
    margin: 0;
    color: var(--muted);
    line-height: 1.7;
}

.comparison-card {
    padding: 28px;
    border: 1px solid rgba(215, 225, 236, 0.92);
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow-soft);
}

.comparison-title {
    margin: 0 0 12px;
    font-size: 1.2rem;
    letter-spacing: -0.03em;
}

.comparison-copy {
    margin: 0;
    color: var(--muted);
    line-height: 1.7;
}

.seo-copy-block {
    max-width: 920px;
    margin: 0 auto;
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.8;
}

.seo-copy-block p {
    margin: 0 0 16px;
}

.seo-copy-block p:last-child {
    margin-bottom: 0;
}

.article-hero {
    padding-bottom: 40px;
}

.article-title {
    max-width: 900px;
}

.secondary-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 62px;
    padding: 0 24px;
    border: 1px solid rgba(215, 225, 236, 0.96);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.88);
    color: var(--text);
    font-weight: 700;
    box-shadow: var(--shadow-soft);
    transition:
        transform 0.2s ease,
        border-color 0.2s ease,
        box-shadow 0.2s ease;
}

.secondary-link:hover,
.secondary-link:focus-visible {
    transform: translateY(-2px);
    border-color: rgba(15, 98, 254, 0.26);
    box-shadow: 0 18px 34px rgba(19, 32, 49, 0.12);
}

.content-shell {
    max-width: 920px;
    margin: 0 auto;
}

.content-card {
    padding: 36px;
    border: 1px solid rgba(215, 225, 236, 0.92);
    border-radius: 28px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow-soft);
}

.content-card h2,
.content-card h3 {
    margin: 0 0 14px;
    letter-spacing: -0.03em;
}

.content-card h2 + p,
.content-card h2 + ul,
.content-card h2 + ol,
.content-card h3 + p {
    margin-top: 0;
}

.content-card p,
.content-card li {
    color: var(--muted);
    line-height: 1.8;
}

.content-card p {
    margin: 0 0 18px;
}

.content-card ul,
.content-card ol {
    margin: 0 0 24px;
    padding-left: 22px;
}

.content-card li + li {
    margin-top: 10px;
}

.cta-panel {
    margin-top: 28px;
    padding: 28px;
    border-radius: 24px;
    background: linear-gradient(135deg, rgba(15, 98, 254, 0.1) 0%, rgba(10, 166, 194, 0.08) 100%);
}

.cta-panel h3 {
    margin: 0 0 10px;
}

.cta-panel p {
    margin: 0 0 18px;
}

.compact-actions {
    justify-content: flex-start;
    margin-bottom: 0;
}

.related-links-block {
    margin-top: 32px;
}

.related-heading {
    margin: 0 0 20px;
    text-align: center;
    letter-spacing: -0.03em;
}

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

.feature-card {
    padding: 32px;
    border: 1px solid rgba(215, 225, 236, 0.92);
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.92);
    box-shadow: var(--shadow-soft);
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: 16px;
    margin-bottom: 22px;
}

.feature-icon.blue {
    background: #dce9ff;
    color: #0f62fe;
}

.feature-icon.teal {
    background: #daf5f8;
    color: #0b90a5;
}

.feature-icon.green {
    background: #dcfce7;
    color: #087443;
}

.feature-icon.orange {
    background: #ffead5;
    color: #c2410c;
}

.feature-title {
    margin: 0 0 12px;
    font-size: 1.35rem;
    letter-spacing: -0.03em;
}

.feature-copy {
    margin: 0;
    color: var(--muted);
    line-height: 1.7;
}

.footer {
    padding: 40px 0;
    background: #132031;
    color: #f3f7fb;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px 24px;
    justify-content: center;
    color: #c8d3e0;
    font-size: 0.95rem;
}

.footer-links a {
    transition: color 0.2s ease;
}

.footer-links a:hover,
.footer-links a:focus-visible {
    color: #ffffff;
}

@media (max-width: 900px) {
    .feature-grid,
    .comparison-grid,
    .resource-grid,
    .compact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 720px) {
    .hero {
        padding-top: 56px;
    }

    .nav-link {
        display: none;
    }

    .command-button,
    .primary-button,
    .secondary-link {
        width: 100%;
    }

    .content-card {
        padding: 28px;
    }

    .copy-status {
        margin-bottom: 36px;
    }

    .footer-inner {
        justify-content: center;
        text-align: center;
    }
}