/* ============================================================
   Content & Research — Project Arklight (new brand)
   Shared stylesheet for the C&R index, essays, and research briefings.
   Light "cream" brand: Inter Tight + JetBrains Mono, rust + steel accents.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter+Tight:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root{
  --canvas-0:#F5F3ED;   /* page */
  --canvas-1:#FBFAF6;   /* lightest / cards */
  --canvas-2:#EFEDE6;   /* alt section */
  --canvas-3:#E7E4DC;
  --ink-0:#15140F;      /* headings */
  --ink-1:#46443E;      /* body */
  --ink-2:#787570;      /* muted */
  --ink-3:#8A867C;      /* mono labels */
  --steel:#2E5A86;      /* links / icons */
  --rust:#B85416;       /* eyebrows / bars / accents */
  --navy:#18324F;       /* dark sections */
  --amber:#F5A14A;      /* accent on dark */
  --line:rgba(20,18,15,.12);
  --line-soft:rgba(20,18,15,.08);
  --font-body:'Inter Tight',system-ui,sans-serif;
  --font-mono:'JetBrains Mono',ui-monospace,monospace;
  --maxw:1240px;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-body);
  background:var(--canvas-0);
  color:var(--ink-1);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.no-scroll{overflow:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}

/* ---------- shared eyebrow ---------- */
.cr-eyebrow{display:flex;align-items:center;gap:12px;margin:0 0 16px}
.cr-eyebrow .bar{width:28px;height:1px;background:var(--rust);opacity:.85;flex:none}
.cr-eyebrow span{font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--rust);margin:0}

/* ============================================================
   HEADER
   ============================================================ */
/* Minimal bar: logo + hamburger only — nav lives in the overlay, matching the home page.
   NB: no backdrop-filter on .cr-header — it would become a containing block for the
   fixed .cr-menu overlay and clip it to the bar. The bar uses a near-opaque bg instead. */
.cr-header{position:sticky;top:0;z-index:120;background:rgba(245,243,237,.94);border-bottom:1px solid var(--line-soft)}
.cr-header_bar{position:relative;z-index:130;max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:24px;padding:15px 24px}
.cr-logo{display:inline-flex;align-items:center;gap:11px;color:var(--ink-0)}
.cr-logo .cr-reticle{width:26px;height:26px;flex:none}
.cr-logo_word{font-size:16px;font-weight:600;letter-spacing:-.01em}
.cr-reticle{display:block;color:inherit}

/* Hamburger -> X (two bars, like the home header) */
.cr-burger{position:relative;z-index:130;width:44px;height:44px;background:none;border:0;cursor:pointer;padding:0;color:var(--ink-0)}
.cr-burger span{position:absolute;left:calc(50% - 14px);display:block;width:28px;height:2px;background:currentColor;transition:transform .45s cubic-bezier(.38,.005,.215,1),opacity .3s}
.cr-burger span:nth-child(1){top:calc(50% - 5px)}
.cr-burger span:nth-child(2){top:calc(50% + 3px)}
.cr-burger.is-open span:nth-child(1){transform:translateY(4px) rotate(45deg)}
.cr-burger.is-open span:nth-child(2){transform:translateY(-4px) rotate(-45deg)}

/* Full-screen overlay; cream panel slides in from the right */
.cr-menu{position:fixed;inset:0;z-index:115;visibility:hidden;transition:visibility 0s .55s}
.cr-menu.is-open{visibility:visible;transition:visibility 0s 0s}
.cr-menu_overlay{position:absolute;inset:0;background:rgba(11,10,8,.5);backdrop-filter:blur(1px);opacity:0;cursor:pointer;transition:opacity .5s cubic-bezier(.38,.005,.215,1)}
.cr-menu.is-open .cr-menu_overlay{opacity:1}
.cr-menu_inner{position:absolute;top:0;right:0;height:100%;width:min(440px,100%);display:flex;flex-direction:column;justify-content:space-between;gap:32px;padding:96px 40px 40px;background:var(--canvas-2);transform:translateX(100%);transition:transform .55s cubic-bezier(.38,.005,.215,1)}
.cr-menu.is-open .cr-menu_inner{transform:translateX(0)}
.cr-menu_nav{display:flex;flex-direction:column;gap:.12em}
.cr-menu_nav a{font-size:clamp(34px,5vw,52px);font-weight:600;letter-spacing:-.025em;line-height:1.12;color:var(--ink-0);transition:color .2s}
.cr-menu_nav a:hover{color:var(--steel)}
.cr-menu_nav a.active{color:var(--rust)}
.cr-menu_details{display:flex;flex-direction:column;gap:4px;margin:0;font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3)}

/* ============================================================
   INDEX — HERO
   ============================================================ */
.cr-hero{max-width:var(--maxw);margin:0 auto;padding:96px 24px 64px}
.cr-hero h1{font-size:clamp(44px,6.2vw,84px);line-height:.98;letter-spacing:-.035em;font-weight:600;color:var(--ink-0);margin:0 0 24px}
.cr-hero h1 em{font-style:normal;font-weight:300;color:var(--ink-2)}
.cr-hero_lead{font-size:clamp(16px,1.5vw,19px);line-height:1.55;color:var(--ink-1);max-width:640px;margin:0 0 40px}
.cr-hero_meta{display:flex;flex-wrap:wrap;gap:40px;padding-top:26px;border-top:1px solid var(--line)}
.cr-hero_meta .k{font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3);margin:0 0 7px}
.cr-hero_meta .v{font-size:19px;font-weight:600;letter-spacing:-.01em;color:var(--ink-0)}

/* ---------- filter strip ---------- */
.cr-filter{position:sticky;top:0;z-index:40;background:rgba(245,243,237,.72);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid transparent;transition:background .4s cubic-bezier(.38,.005,.215,1),border-color .4s,box-shadow .4s}
.cr-filter.is-stuck{background:rgba(245,243,237,.86);border-bottom-color:var(--line-soft);box-shadow:0 6px 24px -18px rgba(20,18,15,.5)}
.cr-filter_inner{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;justify-content:center;gap:10px;padding:13px 24px}
.cr-chips{display:flex;gap:6px;flex-wrap:wrap}
.cr-chip{cursor:pointer;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2);background:transparent;border:1px solid var(--line);border-radius:2px;padding:8px 14px;transition:all .18s}
.cr-chip:hover{color:var(--ink-0);border-color:rgba(20,18,15,.28)}
.cr-chip.active{background:var(--ink-0);color:var(--canvas-0);border-color:var(--ink-0)}
.cr-filter_meta{font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3)}
@media(max-width:700px){.cr-filter_meta{display:none}}

/* ============================================================
   INDEX — FEATURED
   ============================================================ */
.cr-featured-bg{background:var(--canvas-2);border-top:1px solid var(--line-soft)}
.cr-featured{max-width:var(--maxw);margin:0 auto;padding:88px 24px;display:grid;grid-template-columns:1.05fr 1fr;gap:60px;align-items:center}
.cr-featured_meta{display:flex;align-items:center;gap:12px;margin:0 0 18px}
.cr-featured_tag{font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--rust);padding:5px 9px;border:1px solid rgba(184,84,22,.4);border-radius:2px}
.cr-featured_date{font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3)}
.cr-featured h2{font-size:clamp(34px,4.4vw,56px);font-weight:600;line-height:1.02;letter-spacing:-.03em;color:var(--ink-0);margin:0 0 22px}
.cr-featured h2 em{font-style:normal;font-weight:300;color:var(--ink-2)}
.cr-featured_summary{font-size:16px;line-height:1.6;color:var(--ink-1);margin:0 0 28px;max-width:560px}
.cr-featured_stats{display:grid;grid-template-columns:repeat(3,auto);gap:34px;padding:22px 0;margin:0 0 30px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cr-featured_stats .k{font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3);margin:0 0 6px}
.cr-featured_stats .v{font-size:28px;font-weight:600;letter-spacing:-.02em;color:var(--ink-0)}
.cr-featured_stats .v.rust{color:var(--rust)}
.cr-featured_stats .v small{display:block;font-family:var(--font-body);font-size:11px;font-weight:400;color:var(--ink-2);margin-top:4px;letter-spacing:0}
.cr-featured_chart{background:#fff;border:1px solid rgba(20,18,15,.10);border-radius:8px;padding:28px;min-height:400px}
.cr-chart-head{display:flex;justify-content:space-between;align-items:flex-start;padding-bottom:16px;margin-bottom:18px;border-bottom:1px solid var(--line-soft)}
.cr-chart-title{font-size:15px;font-weight:600;color:var(--ink-0);letter-spacing:-.01em}
.cr-chart-sub{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3);margin-top:6px}
.cr-chart-source{font-family:var(--font-mono);font-size:9px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3);text-align:right;line-height:1.5}
.cr-chart-canvas{position:relative;height:300px}

.cr-cta-inline{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font-body);font-size:14px;font-weight:500;letter-spacing:0;text-transform:none;color:var(--canvas-0);background:var(--ink-0);padding:0 22px;height:40px;border:1px solid var(--ink-0);border-radius:4px;transition:background .2s,border-color .2s}
.cr-cta-inline:hover{background:var(--steel);border-color:var(--steel);color:var(--canvas-0)}
.cr-cta-inline .arrow{transition:transform .2s}
.cr-cta-inline:hover .arrow{transform:translateX(3px)}

@media(max-width:1000px){.cr-featured{grid-template-columns:1fr;gap:44px;padding:64px 24px}}

/* ============================================================
   INDEX — SECTION + CARD GRIDS
   ============================================================ */
.cr-sec{max-width:var(--maxw);margin:0 auto;padding:104px 24px}
.cr-sec.alt-bg{max-width:none;background:var(--canvas-2);border-top:1px solid var(--line-soft)}
.cr-sec.alt-bg .cr-sec_inner{max-width:var(--maxw);margin:0 auto}
.cr-sec_head{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin:0 0 48px}
.cr-sec_head .num{font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--rust);margin:0 0 16px}
.cr-sec_head h3{font-size:clamp(30px,4vw,52px);font-weight:600;line-height:1;letter-spacing:-.03em;color:var(--ink-0);margin:0}
.cr-sec_head h3 em{font-style:normal;font-weight:300;color:var(--ink-2)}
.cr-sec_head .meta{font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3);text-align:right;line-height:1.9;white-space:nowrap}
@media(max-width:760px){.cr-sec{padding:72px 24px}.cr-sec_head{flex-direction:column;align-items:flex-start;gap:14px}.cr-sec_head .meta{text-align:left}}

.cr-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cr-card{display:flex;flex-direction:column;background:#fff;border:1px solid rgba(20,18,15,.10);border-radius:8px;padding:28px 26px;transition:border-color .25s,transform .25s,box-shadow .25s}
.cr-card:hover{border-color:rgba(46,90,134,.4);transform:translateY(-3px);box-shadow:0 18px 40px -24px rgba(20,18,15,.35)}
.cr-card:hover .cr-card_title{color:var(--steel)}
.cr-card_head{display:flex;align-items:center;justify-content:space-between;margin:0 0 22px}
.cr-card_tag{font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-2);padding:4px 9px;border:1px solid var(--line);border-radius:2px}
.cr-card_date{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3)}
.cr-card_mini{height:96px;margin:0 0 18px;position:relative}
.cr-card_title{font-size:21px;font-weight:600;letter-spacing:-.015em;color:var(--ink-0);line-height:1.16;margin:0 0 12px;transition:color .25s}
.cr-card_blurb{font-size:14px;line-height:1.55;color:var(--ink-1);margin:0 0 24px;flex:1}
.cr-card_foot{display:flex;align-items:center;justify-content:space-between;padding-top:16px;border-top:1px solid var(--line-soft);font-family:var(--font-mono);font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--ink-3)}
.cr-card_foot .read{color:var(--rust)}
@media(max-width:1000px){.cr-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:680px){.cr-grid{grid-template-columns:1fr}}

/* ============================================================
   INDEX — SUBSCRIBE
   ============================================================ */
.cr-subscribe{background:var(--navy);color:#EAF1F8}
.cr-subscribe_inner{max-width:760px;margin:0 auto;padding:96px 24px;text-align:center}
.cr-subscribe .num{font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--amber);margin:0 0 20px}
.cr-subscribe h3{font-size:clamp(30px,4vw,50px);font-weight:600;line-height:1.05;letter-spacing:-.025em;color:#F4F8FB;margin:0 0 18px}
.cr-subscribe h3 em{font-style:normal;font-weight:300;color:rgba(234,241,248,.7)}
.cr-subscribe p{font-size:15px;line-height:1.6;color:rgba(234,241,248,.72);margin:0 0 30px}
.cr-subscribe_form{display:flex;gap:8px;max-width:480px;margin:0 auto;flex-wrap:wrap;justify-content:center}
.cr-subscribe_form input{flex:1;min-width:240px;font-family:var(--font-body);font-size:14px;color:#F4F8FB;background:rgba(255,255,255,.06);border:1px solid rgba(234,241,248,.18);border-radius:4px;padding:14px 16px;outline:none;transition:border-color .2s}
.cr-subscribe_form input:focus{border-color:var(--amber)}
.cr-subscribe_form input::placeholder{color:rgba(234,241,248,.4)}
.cr-subscribe_form button{font-family:var(--font-body);font-size:14px;font-weight:500;color:var(--navy);background:var(--amber);border:0;border-radius:4px;padding:0 22px;height:48px;cursor:pointer;transition:background .2s,transform .2s}
.cr-subscribe_form button:hover{background:#fff;transform:translateY(-1px)}

/* ============================================================
   FOOTER
   ============================================================ */
/* Mirrors the home / trade-school c-footer: headline, reticle nav, socials, big mark, bottom bar. */
.cr-footer{background:#0B0A08;border-top:1px solid rgba(255,255,255,.08);font-family:var(--font-body)}
.cr-footer_inner{max-width:var(--maxw);margin:0 auto;padding:clamp(84px,13vh,150px) 24px 40px;position:relative}
.cr-footer_title{font-size:clamp(36px,6.4vw,84px);font-weight:600;letter-spacing:-.03em;line-height:1;color:#F4F3EF;margin:0 0 56px;max-width:13ch}
.cr-footer_nav{display:flex;flex-direction:column;gap:2px;margin:0 0 40px;padding:0;list-style:none}
.cr-footer_nav a{display:inline-flex;align-items:center;gap:14px;font-size:clamp(22px,2.6vw,34px);font-weight:500;letter-spacing:-.01em;color:rgba(244,243,239,.82);padding:6px 0;transition:color .2s;width:fit-content}
.cr-footer_nav a:hover{color:#fff}
.cr-footer_ico{display:inline-flex;width:20px;height:20px;color:#F5A14A}
.cr-footer_ico .cr-reticle{width:20px;height:20px}
.cr-footer_social{display:flex;gap:28px;padding-top:28px;border-top:1px solid rgba(255,255,255,.08)}
.cr-footer_social a{display:inline-flex;align-items:center;gap:6px;font-size:16px;font-weight:500;color:rgba(244,243,239,.82);transition:color .2s}
.cr-footer_social a:hover{color:#fff}
.cr-footer_logo{position:absolute;top:clamp(84px,13vh,150px);right:24px;color:rgba(244,243,239,.92)}
.cr-footer_logo .cr-reticle{width:72px;height:72px}
.cr-footer_bottom{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-top:72px;padding-top:24px;border-top:1px solid rgba(255,255,255,.08);font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:rgba(244,243,239,.5)}
.cr-footer_meta{display:flex;gap:28px;margin:0}
.cr-footer_bottom a{color:rgba(244,243,239,.5)}
.cr-footer_bottom a:hover{color:#fff}
.cr-footer_inner{overflow:hidden}
.cr-footer_wm{font-family:var(--font-body);font-weight:600;letter-spacing:-.03em;line-height:1.12;font-size:clamp(40px,8.2vw,118px);color:#F4F3EF;white-space:nowrap;margin:64px 0 0}
@media(max-width:680px){.cr-footer_logo{display:none}.cr-footer_bottom{flex-direction:column;align-items:flex-start;gap:14px}.cr-footer_meta{flex-direction:column;gap:4px}}

/* ============================================================
   ARTICLE (essays) — rs-* layout, new brand
   ============================================================ */
.rs-head{max-width:760px;margin:0 auto;padding:72px 24px 0}
.rs-back{display:inline-block;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2);margin:0 0 36px;transition:color .2s}
.rs-back:hover{color:var(--rust)}
.rs-head_meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:0 0 22px;font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase}
.rs-head_meta .tag{color:var(--rust);padding:4px 9px;border:1px solid rgba(184,84,22,.4);border-radius:2px}
.rs-head_meta .date,.rs-head_meta .id{color:var(--ink-3)}
.rs-head h1{font-size:clamp(34px,5vw,58px);font-weight:600;line-height:1.02;letter-spacing:-.03em;color:var(--ink-0);margin:0 0 24px}
.rs-head h1 em{font-style:normal;font-weight:300;color:var(--ink-2)}
.rs-lead{font-size:clamp(17px,1.7vw,21px);line-height:1.5;color:var(--ink-1);margin:0 0 36px}
.rs-byline{display:flex;align-items:center;gap:20px;flex-wrap:wrap;padding:22px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.rs-byline .author{font-size:14px;font-weight:600;color:var(--ink-0)}
.rs-byline .role{font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3);margin-top:3px}
.rs-byline .read-time{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-2);margin-left:auto}
.rs-byline .original{display:inline-flex;align-items:center;gap:7px;font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--steel)}
.rs-byline .original svg{width:13px;height:13px}
.rs-byline .original:hover{color:var(--ink-0)}

.rs-body{max-width:680px;margin:0 auto;padding:48px 24px 0}
.rs-body>*{margin-left:auto;margin-right:auto}
.rs-body h2{font-size:clamp(24px,2.8vw,32px);font-weight:600;letter-spacing:-.02em;color:var(--ink-0);line-height:1.15;margin:48px 0 18px}
.rs-body h3{font-size:20px;font-weight:600;letter-spacing:-.015em;color:var(--ink-0);margin:36px 0 14px}
.rs-body p{font-size:17px;line-height:1.7;color:var(--ink-1);margin:0 0 22px}
.rs-body a:not(.rs-back){color:var(--steel);text-decoration:underline;text-underline-offset:2px;text-decoration-color:rgba(46,90,134,.35)}
.rs-body a:not(.rs-back):hover{text-decoration-color:var(--steel)}
.rs-body strong{color:var(--ink-0);font-weight:600}
.rs-body em{font-style:italic}
.rs-body ul,.rs-body ol{font-size:17px;line-height:1.7;color:var(--ink-1);margin:0 0 22px;padding-left:24px}
.rs-body li{margin:0 0 8px}
.rs-body blockquote{margin:32px 0;padding:4px 0 4px 26px;border-left:2px solid var(--rust);font-size:21px;line-height:1.45;font-weight:500;color:var(--ink-0)}
.rs-body blockquote p{font-size:inherit;color:inherit;margin:0}

.rs-keystats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(20,18,15,.10);border:1px solid rgba(20,18,15,.10);border-radius:8px;overflow:hidden;margin:36px 0}
.rs-keystats .cell{background:#fff;padding:22px 18px;text-align:center}
.rs-keystats .k{font-family:var(--font-mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin:0 0 10px;min-height:24px}
.rs-keystats .v{font-size:30px;font-weight:600;letter-spacing:-.02em;color:var(--ink-0);line-height:1}
.rs-keystats .v.amber{color:var(--rust)}
.rs-keystats .sub{font-size:11px;color:var(--ink-2);margin-top:7px}
@media(max-width:620px){.rs-keystats{grid-template-columns:repeat(2,1fr)}}

.rs-kicker{margin:48px 0;padding:26px 28px;background:var(--canvas-2);border:1px solid rgba(20,18,15,.10);border-radius:8px;font-size:14.5px;line-height:1.6;color:var(--ink-1)}
.rs-kicker strong{color:var(--ink-0)}

.rs-cta{background:var(--navy);color:#EAF1F8;margin-top:96px}
.rs-cta_inner{max-width:760px;margin:0 auto;padding:88px 24px;text-align:center}
.rs-cta .num{font-family:var(--font-mono);font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--amber);margin:0 0 20px}
.rs-cta h3{font-size:clamp(30px,4vw,48px);font-weight:600;line-height:1.05;letter-spacing:-.025em;color:#F4F8FB;margin:0 0 18px}
.rs-cta h3 em{font-style:normal;font-weight:300;color:rgba(234,241,248,.7)}
.rs-cta p{font-size:15px;line-height:1.6;color:rgba(234,241,248,.72);margin:0 0 30px}
.rs-cta_actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.rs-btn{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:500;padding:0 22px;height:48px;border-radius:4px;transition:background .2s,transform .2s,color .2s}
.rs-btn-primary{background:var(--amber);color:var(--navy)}
.rs-btn-primary:hover{background:#fff;transform:translateY(-1px)}
.rs-btn-secondary{background:transparent;color:#EAF1F8;border:1px solid rgba(234,241,248,.28)}
.rs-btn-secondary:hover{border-color:#fff;transform:translateY(-1px)}

/* ============================================================
   RESEARCH BRIEFING — vb-* layout, new brand
   ============================================================ */
.vb-head{max-width:var(--maxw);margin:0 auto;padding:72px 24px 56px}
.vb-back{display:inline-block;font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-2);margin:0 0 36px;transition:color .2s}
.vb-back:hover{color:var(--rust)}
.vb-head_meta{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin:0 0 22px;font-family:var(--font-mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase}
.vb-head_meta .tag{color:var(--rust);padding:4px 9px;border:1px solid rgba(184,84,22,.4);border-radius:2px}
.vb-head_meta .date,.vb-head_meta .id{color:var(--ink-3)}
.vb-title{font-size:clamp(36px,5.4vw,64px);font-weight:600;line-height:1;letter-spacing:-.035em;color:var(--ink-0);margin:0 0 24px}
.vb-title em{font-style:normal;font-weight:300;color:var(--ink-2)}
.vb-lead{font-size:clamp(16px,1.6vw,20px);line-height:1.55;color:var(--ink-1);max-width:680px;margin:0 0 40px}
.vb-keystats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:rgba(20,18,15,.10);border:1px solid rgba(20,18,15,.10);border-radius:8px;overflow:hidden}
.vb-keystats .cell{background:#fff;padding:24px 20px}
.vb-keystats .k{font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-3);margin:0 0 10px}
.vb-keystats .v{font-size:32px;font-weight:600;letter-spacing:-.02em;color:var(--ink-0);line-height:1}
.vb-keystats .v.rust{color:var(--rust)}
.vb-keystats .sub{font-size:12px;color:var(--ink-2);margin-top:7px}
@media(max-width:680px){.vb-keystats{grid-template-columns:repeat(2,1fr)}}

.vb-grid{max-width:var(--maxw);margin:0 auto;padding:0 24px 64px;display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.vb-panel{background:#fff;border:1px solid rgba(20,18,15,.10);border-radius:8px;padding:26px 26px 22px;display:flex;flex-direction:column}
.vb-panel.wide{grid-column:1/-1}
.vb-panel-head{display:flex;align-items:center;gap:12px;margin:0 0 6px}
.vb-panel-num{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--rust);font-weight:500}
.vb-panel-title{font-size:18px;font-weight:600;letter-spacing:-.015em;color:var(--ink-0);margin:0}
.vb-panel-sub{font-size:13.5px;line-height:1.5;color:var(--ink-2);margin:0 0 18px}
.vb-chart{position:relative;height:260px;margin-top:auto}
.vb-chart.tall{height:340px}
.vb-note{font-family:var(--font-mono);font-size:10px;letter-spacing:.06em;color:var(--ink-3);margin:16px 0 0;line-height:1.5}
.vb-chart{position:relative}
.vb-callout{position:absolute;font-family:var(--font-mono);font-size:11px;font-weight:500;letter-spacing:.04em;text-transform:uppercase;background:var(--ember,#C0432B);color:#fff;padding:5px 10px;border-radius:2px;z-index:5;box-shadow:0 4px 14px rgba(20,18,15,.18)}
.vb-keyfig{display:grid;grid-auto-flow:column;gap:18px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line-soft)}
.vb-keyfig .k{font-family:var(--font-mono);font-size:9.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);margin:0 0 6px}
.vb-keyfig .v{font-size:19px;font-weight:600;letter-spacing:-.01em;color:var(--ink-0);line-height:1}
.vb-keyfig .v.amber{color:var(--rust)}
.vb-keyfig .v.blue{color:var(--steel)}
.vb-keyfig .v.ember{color:#C0432B}
.vb-flag{font-family:var(--font-mono);font-size:10px;letter-spacing:.04em;color:var(--ink-3);margin:16px 0 0;line-height:1.55;padding-left:14px;border-left:2px solid rgba(184,84,22,.4)}
@media(max-width:760px){
  .vb-grid{grid-template-columns:1fr;gap:16px}
  .vb-panel{padding:22px 18px 20px}
  /* single-column now: give charts more vertical room so they read cleanly */
  .vb-chart{height:300px}
  .vb-chart.tall{height:360px}
}
@media(max-width:440px){
  .vb-chart{height:260px}
  .vb-chart.tall{height:320px}
}

.vb-method{max-width:var(--maxw);margin:0 auto;padding:0 24px 96px}
.vb-method_inner{background:var(--canvas-2);border:1px solid rgba(20,18,15,.10);border-radius:8px;padding:36px}
.vb-method_inner h2{font-size:22px;font-weight:600;letter-spacing:-.015em;color:var(--ink-0);margin:0 0 18px}
.vb-method_inner p{font-size:14.5px;line-height:1.65;color:var(--ink-1);margin:0 0 16px}
.vb-method_inner p:last-child{margin-bottom:0}
.vb-method_inner strong{color:var(--ink-0)}
.vb-method_inner a{color:var(--steel);text-decoration:underline;text-underline-offset:2px}

/* ============================================================
   REVEAL ON SCROLL
   ============================================================ */
[data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .8s cubic-bezier(.22,1,.36,1),transform .8s cubic-bezier(.22,1,.36,1)}
[data-reveal].in{opacity:1;transform:none}
[data-reveal-delay="1"]{transition-delay:.06s}
[data-reveal-delay="2"]{transition-delay:.12s}
[data-reveal-delay="3"]{transition-delay:.18s}
[data-reveal-delay="4"]{transition-delay:.24s}
@media(prefers-reduced-motion:reduce){[data-reveal]{opacity:1;transform:none;transition:none}}