:root {
    --article-ink: #172033;
    --article-muted: #667085;
    --article-line: #e7eaf0;
    --article-paper: #ffffff;
    --article-soft: #f7f8fb;
    --article-accent: #6366f1;
    --article-accent-2: #a855f7;
}

html { scroll-behavior: smooth; }
body { font-family: 'Inter', sans-serif; color: var(--article-ink); }

.article-hero {
    position: relative;
    overflow: hidden;
    color: #fff;
    background:
        radial-gradient(circle at 15% 15%, rgba(168, 85, 247, .28), transparent 31%),
        radial-gradient(circle at 88% 10%, rgba(99, 102, 241, .32), transparent 28%),
        linear-gradient(145deg, #111827 0%, #192038 55%, #111827 100%);
}

.article-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    opacity: .18;
    background-image: radial-gradient(rgba(255,255,255,.55) .7px, transparent .7px);
    background-size: 22px 22px;
    mask-image: linear-gradient(to bottom, #000, transparent 84%);
}

.article-kicker {
    display: inline-flex;
    align-items: center;
    gap: .55rem;
    padding: .48rem .8rem;
    border: 1px solid rgba(255,255,255,.18);
    border-radius: 999px;
    color: rgba(255,255,255,.86);
    background: rgba(255,255,255,.08);
    font-size: .76rem;
    font-weight: 800;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.article-title {
    max-width: 980px;
    margin: 1.3rem auto 0;
    font-size: clamp(2.45rem, 6vw, 5.3rem);
    line-height: .98;
    letter-spacing: -.055em;
    font-weight: 900;
    text-wrap: balance;
}

.article-dek {
    max-width: 760px;
    margin: 1.55rem auto 0;
    color: rgba(255,255,255,.7);
    font-size: clamp(1.05rem, 2vw, 1.25rem);
    line-height: 1.65;
    text-wrap: balance;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: .65rem 1rem;
    margin-top: 1.8rem;
    color: rgba(255,255,255,.58);
    font-size: .82rem;
    font-weight: 650;
}

.article-meta span { display: inline-flex; align-items: center; gap: .4rem; }

.article-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
    max-width: 1180px;
    margin: -3.3rem auto 0;
    padding: 0 1rem 5rem;
    position: relative;
    z-index: 10;
}

.article-paper {
    min-width: 0;
    padding: clamp(1.5rem, 4vw, 4.5rem);
    border: 1px solid var(--article-line);
    border-radius: 1.8rem;
    background: var(--article-paper);
    box-shadow: 0 28px 80px rgba(17, 24, 39, .1);
}

.article-prose { max-width: 760px; margin: 0 auto; }
.article-prose > :first-child { margin-top: 0; }
.article-prose p, .article-prose li { color: #40495b; line-height: 1.82; }
.article-prose p { margin: 1.15rem 0; }
.article-prose strong { color: var(--article-ink); font-weight: 760; }
.article-prose a:not(.article-button) { color: #4f46e5; text-decoration: underline; text-decoration-color: #c7d2fe; text-underline-offset: 3px; }
.article-prose a:not(.article-button):hover { text-decoration-color: #4f46e5; }

.article-prose h2 {
    margin: 3.6rem 0 1rem;
    color: #131b2c;
    font-size: clamp(1.75rem, 3vw, 2.35rem);
    line-height: 1.16;
    letter-spacing: -.035em;
    font-weight: 850;
    scroll-margin-top: 6rem;
}

.article-prose h3 {
    margin: 2.2rem 0 .7rem;
    color: #182133;
    font-size: 1.28rem;
    line-height: 1.35;
    letter-spacing: -.018em;
    font-weight: 800;
    scroll-margin-top: 6rem;
}

.article-prose ul, .article-prose ol { margin: 1.2rem 0; padding-left: 1.35rem; }
.article-prose li { margin: .55rem 0; padding-left: .25rem; }
.article-prose li::marker { color: var(--article-accent); font-weight: 800; }

.article-lead {
    color: #273247 !important;
    font-size: clamp(1.18rem, 2.5vw, 1.45rem);
    line-height: 1.65 !important;
    letter-spacing: -.018em;
    font-weight: 520;
}

.quick-answer {
    margin: 2rem 0;
    padding: 1.35rem 1.45rem;
    border: 1px solid #d9dcff;
    border-left: 5px solid var(--article-accent);
    border-radius: 1rem;
    background: linear-gradient(135deg, #f8f8ff, #fff);
}

.quick-answer small {
    display: block;
    margin-bottom: .45rem;
    color: #4f46e5;
    font-size: .72rem;
    font-weight: 850;
    letter-spacing: .1em;
    text-transform: uppercase;
}

.quick-answer p { margin: 0; color: #30394b; line-height: 1.65; }

.note, .warning, .field-note {
    margin: 1.75rem 0;
    padding: 1.25rem 1.35rem;
    border-radius: 1rem;
    background: #f7f8fb;
    border: 1px solid var(--article-line);
}
.note { border-left: 4px solid #06b6d4; }
.warning { border-left: 4px solid #f59e0b; background: #fffbeb; }
.field-note { border-left: 4px solid #8b5cf6; background: #faf8ff; }
.note p, .warning p, .field-note p { margin: 0; }

.article-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    margin: 1.6rem 0;
}

.content-card {
    padding: 1.2rem;
    border: 1px solid var(--article-line);
    border-radius: 1rem;
    background: #fff;
    box-shadow: 0 10px 28px rgba(17,24,39,.04);
}
.content-card h3, .content-card h4 { margin: .25rem 0 .55rem; color: #1b2436; font-size: 1rem; font-weight: 820; }
.content-card p { margin: 0; font-size: .92rem; line-height: 1.65; }
.content-card .card-icon { color: var(--article-accent); font-size: 1.35rem; }

.process-list { list-style: none; padding: 0 !important; counter-reset: process; }
.process-list > li {
    position: relative;
    margin: 0 !important;
    padding: 0 0 1.8rem 3.5rem;
    counter-increment: process;
}
.process-list > li::before {
    content: counter(process);
    position: absolute;
    top: .05rem;
    left: 0;
    display: grid;
    place-items: center;
    width: 2.35rem;
    height: 2.35rem;
    border-radius: .75rem;
    color: #fff;
    background: linear-gradient(135deg, var(--article-accent), var(--article-accent-2));
    font-size: .85rem;
    font-weight: 850;
}
.process-list > li::after {
    content: '';
    position: absolute;
    top: 2.55rem;
    bottom: .25rem;
    left: 1.14rem;
    width: 1px;
    background: #dddff0;
}
.process-list > li:last-child::after { display: none; }
.process-list h3 { margin: .2rem 0 .45rem; }
.process-list p { margin: 0; }

.table-wrap {
    width: 100%;
    margin: 1.6rem 0;
    overflow-x: auto;
    border: 1px solid var(--article-line);
    border-radius: 1rem;
}
.article-table { width: 100%; min-width: 650px; border-collapse: collapse; font-size: .88rem; }
.article-table th { padding: .9rem 1rem; color: #394257; background: #f4f5f8; text-align: left; font-size: .73rem; letter-spacing: .05em; text-transform: uppercase; }
.article-table td { padding: .9rem 1rem; color: #465064; border-top: 1px solid var(--article-line); vertical-align: top; }
.article-table tr:hover td { background: #fbfbfd; }

.metric-strip {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    margin: 1.6rem 0;
    overflow: hidden;
    border: 1px solid var(--article-line);
    border-radius: 1rem;
    background: var(--article-line);
}
.metric { padding: 1.15rem; background: #fff; text-align: center; }
.metric strong { display: block; color: #202a3c; font-size: 1.2rem; }
.metric span { color: var(--article-muted); font-size: .76rem; }

.article-figure { margin: 2rem 0; overflow: hidden; border: 1px solid var(--article-line); border-radius: 1.2rem; background: #f4f5f8; }
.article-figure img { display: block; width: 100%; height: auto; }
.article-figure figcaption { padding: .8rem 1rem; color: var(--article-muted); background: #fff; font-size: .78rem; line-height: 1.5; }

.faq { margin-top: 1.2rem; border-top: 1px solid var(--article-line); }
.faq details { padding: 1rem 0; border-bottom: 1px solid var(--article-line); }
.faq summary { cursor: pointer; color: #1d2638; font-weight: 780; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; float: right; color: var(--article-accent); font-size: 1.25rem; }
.faq details[open] summary::after { content: '–'; }
.faq p { margin: .8rem 0 0; font-size: .95rem; }

.article-sidebar { display: none; }
.toc-card { padding: 1.1rem; border: 1px solid var(--article-line); border-radius: 1rem; background: rgba(255,255,255,.88); box-shadow: 0 12px 35px rgba(17,24,39,.06); }
.toc-card strong { display: block; margin-bottom: .65rem; color: #222b3c; font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; }
.toc-card a { display: block; padding: .42rem .2rem; color: #667085; font-size: .78rem; line-height: 1.35; }
.toc-card a:hover { color: var(--article-accent); }

.article-cta {
    max-width: 760px;
    margin: 3.8rem auto 0;
    padding: clamp(1.6rem, 4vw, 2.6rem);
    overflow: hidden;
    border-radius: 1.5rem;
    color: #fff;
    background:
        radial-gradient(circle at 95% 5%, rgba(255,255,255,.22), transparent 30%),
        linear-gradient(135deg, #4f46e5, #9333ea);
    box-shadow: 0 22px 50px rgba(79,70,229,.22);
}
.article-cta h2 { margin: 0 0 .7rem; color: #fff; font-size: clamp(1.6rem, 3vw, 2.2rem); }
.article-cta p { margin: 0 0 1.3rem; color: rgba(255,255,255,.78); line-height: 1.65; }
.article-button { display: inline-flex; align-items: center; gap: .55rem; padding: .78rem 1rem; border-radius: .75rem; color: #4338ca !important; background: #fff; font-size: .88rem; font-weight: 820; text-decoration: none !important; box-shadow: 0 8px 20px rgba(0,0,0,.12); }
.article-button:hover { transform: translateY(-1px); }

.related-wrap { max-width: 1180px; margin: 0 auto; padding: 0 1rem 5rem; }
.related-wrap h2 { margin-bottom: 1.2rem; color: #1b2436; font-size: 1.5rem; font-weight: 850; letter-spacing: -.025em; }
.related-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; }
.related-card { display: flex; min-height: 175px; flex-direction: column; justify-content: space-between; padding: 1.25rem; border: 1px solid var(--article-line); border-radius: 1rem; background: #fff; box-shadow: 0 10px 30px rgba(17,24,39,.04); transition: .2s ease; }
.related-card:hover { transform: translateY(-3px); border-color: #c7d2fe; box-shadow: 0 16px 35px rgba(17,24,39,.08); }
.related-card small { color: #7c3aed; font-weight: 750; }
.related-card h3 { margin: .65rem 0; color: #20293b; font-size: 1.02rem; line-height: 1.35; font-weight: 800; }
.related-card span { color: #667085; font-size: .78rem; }

@media (min-width: 1024px) {
    .article-layout { grid-template-columns: 210px minmax(0, 1fr); align-items: start; }
    .article-sidebar { display: block; position: sticky; top: 6.25rem; margin-top: 4.4rem; }
}

@media (max-width: 760px) {
    .article-hero { padding-bottom: 5.5rem !important; }
    .article-layout { margin-top: -2.3rem; }
    .article-paper { border-radius: 1.25rem; }
    .article-grid, .related-grid { grid-template-columns: 1fr; }
    .metric-strip { grid-template-columns: 1fr; }
    .article-title { font-size: clamp(2.3rem, 12vw, 3.5rem); }
}