.csd-page {
    --csd-bg: #070c10;
    --csd-text: #f1f4f6;
    --csd-muted: #9daab4;
    --csd-line: rgba(181, 206, 221, .14);
    --csd-accent: #27cde7;
    --csd-warm: #ff6848;
    background: var(--csd-bg);
    color: var(--csd-text);
    font-size: 16px;
    line-height: 1.72;
    min-height: 100vh;
}

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

.csd-page h1,
.csd-page h2,
.csd-page h3,
.csd-page p { margin-top: 0; }

.csd-intro {
    background: radial-gradient(circle at 82% 20%, rgba(39, 205, 231, .08), transparent 28rem), var(--csd-bg);
    border-bottom: 1px solid var(--csd-line);
    padding: clamp(4.5rem, 8vw, 7.5rem) max(5vw, 24px) clamp(3.8rem, 7vw, 6rem);
}

.csd-intro-inner {
    margin: 0 auto;
    max-width: 1180px;
    padding-left: 278px;
}

.csd-product,
.csd-section-number {
    color: var(--csd-warm);
    font-size: .72rem;
    font-weight: 760;
    letter-spacing: .15em;
    text-transform: uppercase;
}

.csd-product { margin: 0 0 1.35rem; }

.csd-page h1 {
    font-size: clamp(3rem, 5.2vw, 5.2rem);
    font-weight: 700;
    letter-spacing: -.055em;
    line-height: .98;
    margin-bottom: 1.65rem;
    max-width: 720px;
}

.csd-intro-copy {
    color: var(--csd-muted);
    font-size: clamp(1rem, 1.3vw, 1.16rem);
    line-height: 1.75;
    max-width: 660px;
}

.csd-intro-meta {
    color: #bdc7cd;
    display: flex;
    flex-wrap: wrap;
    font-size: .76rem;
    gap: .7rem 1.6rem;
    letter-spacing: .06em;
    margin-top: 1.8rem;
    text-transform: uppercase;
}

.csd-intro-meta span + span::before {
    color: #49565f;
    content: "•";
    margin-right: 1.6rem;
}

.csd-search {
    align-items: center;
    border-bottom: 1px solid rgba(255,255,255,.28);
    display: flex;
    gap: .7rem;
    margin-top: 2.7rem;
    max-width: 520px;
    padding-bottom: .7rem;
}

.csd-search:focus-within { border-color: var(--csd-accent); }
.csd-search svg { fill: none; height: 18px; stroke: var(--csd-accent); stroke-width: 1.7; width: 18px; }
.csd-search input { appearance: none; background: transparent; border: 0; color: var(--csd-text); font: inherit; font-size: .92rem; outline: 0; padding: 0; width: 100%; }
.csd-search input::placeholder { color: #71808a; opacity: 1; }

.csd-layout {
    display: grid;
    gap: 48px;
    grid-template-columns: 230px minmax(0, 820px);
    margin: 0 auto;
    max-width: 1180px;
    padding: 0 max(5vw, 24px) 8rem;
}

.csd-toc {
    align-self: start;
    border-right: 1px solid var(--csd-line);
    max-height: calc(100vh - 2.5rem);
    overflow-y: auto;
    padding: 4rem 28px 2rem 0;
    position: sticky;
    scrollbar-color: rgba(255,255,255,.18) transparent;
    scrollbar-width: thin;
    top: 1.25rem;
}

.csd-toc > p { color: #74828c; font-size: .68rem; font-weight: 750; letter-spacing: .15em; margin-bottom: 1.1rem; text-transform: uppercase; }
.csd-toc nav { display: grid; }
.csd-toc a { color: #929ea7; display: grid; font-size: .78rem; gap: .65rem; grid-template-columns: 1.55rem 1fr; line-height: 1.35; padding: .42rem 0; text-decoration: none; transition: color .18s ease; }
.csd-toc a span { color: #53616b; font-size: .63rem; letter-spacing: .07em; }
.csd-toc a:hover,
.csd-toc a.is-active { color: var(--csd-text); }
.csd-toc a.is-active span { color: var(--csd-accent); }

.csd-article { min-width: 0; }
.csd-section { border-top: 1px solid var(--csd-line); padding: clamp(4.5rem, 7vw, 6.5rem) 0; scroll-margin-top: 1rem; }
.csd-section:first-of-type { border-top: 0; }
.csd-section[hidden] { display: none; }

.csd-section-intro.has-visual {
    align-items: start;
    display: grid;
    gap: clamp(2rem, 5vw, 4.5rem);
    grid-template-columns: minmax(0, 1fr) minmax(210px, 280px);
}

.csd-section-number { margin-bottom: 1rem; }
.csd-page h2 { font-size: clamp(2.05rem, 3.7vw, 3.4rem); font-weight: 680; letter-spacing: -.045em; line-height: 1.04; margin-bottom: 1rem; }
.csd-lead { color: var(--csd-muted); font-size: 1.02rem; line-height: 1.72; max-width: 620px; }
.csd-page h3 { font-size: 1.2rem; font-weight: 650; letter-spacing: -.02em; margin-bottom: 1.1rem; margin-top: 3.8rem; }

.csd-figure { margin: 0; }
.csd-figure img { display: block; height: auto; max-width: 100%; }
.csd-figure.is-square img { aspect-ratio: 1; object-fit: cover; width: 100%; }
.csd-figure.is-panel { display: flex; justify-content: flex-end; }
.csd-figure.is-panel img { max-height: 330px; object-fit: contain; width: auto; }

.csd-comparison { display: grid; gap: .8rem; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.csd-comparison figure { margin: 0; }
.csd-comparison img { aspect-ratio: 1; display: block; object-fit: cover; width: 100%; }
.csd-comparison figcaption { color: #84919a; font-size: .66rem; font-weight: 700; letter-spacing: .12em; padding-top: .5rem; text-transform: uppercase; }

.csd-steps { list-style: none; margin: 0; max-width: 720px; padding: 0; }
.csd-steps li { align-items: baseline; border-top: 1px solid var(--csd-line); display: grid; gap: 1rem; grid-template-columns: 2rem minmax(0, 1fr); padding: .92rem 0; }
.csd-steps li:last-child { border-bottom: 1px solid var(--csd-line); }
.csd-steps span { color: var(--csd-accent); font-size: .66rem; font-weight: 750; letter-spacing: .08em; }
.csd-steps p { color: #d9dfe3; margin: 0; }

.csd-tools { margin: 0; max-width: 760px; }
.csd-tools > div { border-top: 1px solid var(--csd-line); display: grid; gap: 1.4rem; grid-template-columns: minmax(160px, .68fr) minmax(0, 1.32fr); padding: 1rem 0 1.12rem; }
.csd-tools > div:last-child { border-bottom: 1px solid var(--csd-line); }
.csd-tools dt { color: var(--csd-text); font-weight: 630; }
.csd-tools dd { color: var(--csd-muted); margin: 0; }

.csd-note { border-left: 2px solid var(--csd-accent); margin-top: 3rem; max-width: 720px; padding: .1rem 0 .1rem 1.2rem; }
.csd-note.is-warning { border-left-color: #ffad49; }
.csd-note strong { display: block; font-size: .93rem; margin-bottom: .3rem; }
.csd-note p { color: var(--csd-muted); margin-bottom: 0; }
.csd-no-results { color: var(--csd-muted); padding: 4rem 0; }
.csd-mobile-nav { display: none; }

@media (max-width: 980px) {
    .csd-intro-inner { padding-left: 0; }
    .csd-layout { display: block; }
    .csd-toc { display: none; }
    .csd-mobile-nav { background: rgba(7,12,16,.96); border-bottom: 1px solid var(--csd-line); display: grid; gap: .35rem; padding: .8rem max(5vw,24px); position: sticky; top: 0; z-index: 30; }
    .csd-mobile-nav label { color: var(--csd-muted); font-size: .64rem; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }
    .csd-mobile-nav select { appearance: none; background: transparent; border: 0; color: var(--csd-text); font: inherit; font-size: .84rem; padding: .1rem 0; width: 100%; }
    .csd-mobile-nav option { background: var(--csd-bg); }
}

@media (max-width: 680px) {
    .csd-page { font-size: 15px; }
    .csd-intro { padding-top: 4rem; }
    .csd-page h1 { font-size: clamp(2.65rem, 12vw, 4rem); }
    .csd-intro-meta span + span::before { display: none; }
    .csd-section-intro.has-visual { grid-template-columns: minmax(0, 1fr) 118px; gap: 1.25rem; }
    .csd-comparison { gap: .45rem; }
    .csd-figure.is-panel img { max-height: 190px; }
    .csd-tools > div { gap: .35rem; grid-template-columns: 1fr; }
}

@media (max-width: 430px) {
    .csd-section-intro.has-visual { display: block; }
    .csd-figure,
    .csd-comparison { margin-top: 1.6rem; max-width: 190px; }
}

@media (prefers-reduced-motion: reduce) {
    .csd-toc a { transition: none; }
}