/* ═══════════════════════════════════════════════════════════
   NOTES FROM THE SEAMS — Shared stylesheet
   Used across every page. Edit once, applies everywhere.
   ═══════════════════════════════════════════════════════════ */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --paper:#F2EDE3;
  --paper-warm:#EDE7DB;
  --paper-deep:#E3DCCD;
  --ink:#1A1815;
  --ink-soft:#2E2A24;
  --muted:#6B6862;
  --dim:#9A9690;
  --faint:#C4BFB5;
  --rule:#D4CEC1;
  --emerald:#1F5F54;
  --emerald-deep:#164238;
  --ochre:#A8701F;
  --rust:#8A3F28;
  --serif:'Fraunces',Georgia,serif;
  --bangla:'Noto Serif Bengali','Fraunces',serif;
  --mono:'JetBrains Mono',ui-monospace,monospace;
}

html{scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:var(--serif);font-size:17px;line-height:1.7;-webkit-font-smoothing:antialiased;font-variation-settings:"opsz" 16;overflow-x:hidden}
body::before{content:'';position:fixed;inset:0;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 300 300' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.72' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");pointer-events:none;z-index:1;mix-blend-mode:multiply}
::selection{background:var(--emerald);color:var(--paper)}

/* ═══ MASTHEAD ═══ */
.mast{border-bottom:2px solid var(--ink);background:var(--paper);position:sticky;top:0;z-index:50}
.mast-inner{max-width:1280px;margin:0 auto;padding:18px 32px;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:40px}
.mast-title{font-family:var(--serif);font-size:22px;font-weight:500;letter-spacing:-.01em;color:var(--ink);text-decoration:none;font-variation-settings:"opsz" 18}
.mast-title em{font-style:italic;color:var(--muted);font-weight:400;font-size:20px}
.mast-title .bn{font-family:var(--bangla);font-weight:400;color:var(--muted);margin-left:8px;font-size:18px}
.mast-date{font-family:var(--mono);font-size:10.5px;color:var(--muted);letter-spacing:.08em;text-align:center;line-height:1.6}
.mast-date .pulse{display:inline-block;width:5px;height:5px;background:var(--emerald);border-radius:50%;margin-right:6px;vertical-align:middle;animation:pulse 2.4s ease-in-out infinite}
.mast-nav{display:flex;gap:22px;list-style:none}
.mast-nav a{font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:var(--ink-soft);text-decoration:none;text-transform:uppercase;transition:color .2s;padding:4px 0;border-bottom:1px solid transparent}
.mast-nav a:hover{color:var(--emerald);border-bottom-color:var(--emerald)}
.mast-nav a.active{color:var(--emerald);border-bottom-color:var(--emerald)}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}

/* ═══ PAGE CONTAINERS ═══ */
.page{max-width:1280px;margin:0 auto;padding:48px 32px 24px;position:relative;z-index:2}
.article-page{max-width:760px;margin:0 auto;padding:56px 32px 48px;position:relative;z-index:2}
.index-page{max-width:1100px;margin:0 auto;padding:48px 32px 24px;position:relative;z-index:2}

/* ═══ PROVENANCE BADGES ═══ */
.prov{font-family:var(--mono);font-size:10px;letter-spacing:.1em;text-transform:uppercase;padding:4px 10px;border:1px solid var(--rule);color:var(--ink-soft);background:var(--paper-warm);display:inline-block}
.prov-human{border-color:var(--emerald);color:var(--emerald)}
.prov-assisted{border-color:var(--ochre);color:var(--ochre)}
.prov-research{border-color:var(--rust);color:var(--rust)}
.prov-demo{border-color:var(--ink);color:var(--ink);background:var(--paper-deep)}

/* ═══ BREADCRUMB / PAGE HEADER ═══ */
.crumbs{display:flex;align-items:center;gap:10px;margin-bottom:28px;font-family:var(--mono);font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.crumbs a{color:var(--muted);text-decoration:none;transition:color .2s}
.crumbs a:hover{color:var(--emerald)}
.crumbs .sep{color:var(--dim)}
.crumbs .current{color:var(--emerald)}

.section-header{padding-bottom:32px;margin-bottom:48px;border-bottom:1px solid var(--rule)}
.section-header .eyebrow{font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--emerald);margin-bottom:14px;display:block}
.section-header h1{font-family:var(--serif);font-size:clamp(36px,5vw,60px);font-weight:300;line-height:1.05;letter-spacing:-.018em;margin-bottom:14px;font-variation-settings:"opsz" 96;max-width:880px}
.section-header h1 em{font-style:italic;color:var(--muted)}
.section-header .dek{font-family:var(--serif);font-size:18px;color:var(--ink-soft);font-style:italic;max-width:640px;line-height:1.55;font-variation-settings:"opsz" 18}

/* ═══ ARTICLE (long-form) ═══ */
.article-kicker{display:flex;align-items:center;gap:12px;margin-bottom:20px;flex-wrap:wrap}
.article-cat{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.article-title{font-family:var(--serif);font-size:clamp(34px,4.4vw,56px);font-weight:400;line-height:1.08;letter-spacing:-.018em;margin-bottom:18px;font-variation-settings:"opsz" 96}
.article-title em{font-style:italic;color:var(--muted);font-weight:300}
.article-dek{font-family:var(--serif);font-size:20px;color:var(--ink-soft);line-height:1.5;margin-bottom:28px;font-variation-settings:"opsz" 24;max-width:680px}
.article-byline{padding:16px 0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);margin-bottom:40px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.04em}
.article-byline strong{color:var(--ink);font-weight:500}

.article-body{font-size:18px;line-height:1.8;color:var(--ink-soft);font-variation-settings:"opsz" 16;max-width:680px}
.article-body p{margin-bottom:22px}
.article-body > p:first-of-type::first-letter{font-family:var(--serif);font-size:68px;font-weight:400;float:left;line-height:.85;margin:10px 12px 0 -4px;color:var(--emerald);font-variation-settings:"opsz" 144}
.article-body strong{font-weight:500;color:var(--ink)}
.article-body em{font-style:italic;color:var(--ink)}
.article-body a{color:var(--emerald);text-decoration:none;border-bottom:1px solid var(--emerald)}
.article-body a:hover{background:var(--emerald);color:var(--paper);padding:1px 3px;margin:-1px -3px 0 -3px}
.article-body h2{font-family:var(--serif);font-size:30px;font-weight:500;margin:48px 0 18px;line-height:1.2;letter-spacing:-.012em;font-variation-settings:"opsz" 36;color:var(--ink)}
.article-body h2 em{font-style:italic;color:var(--muted);font-weight:400}
.article-body h3{font-family:var(--serif);font-size:22px;font-weight:500;margin:32px 0 14px;line-height:1.3;font-variation-settings:"opsz" 24;color:var(--ink)}
.article-body blockquote{border-left:2px solid var(--emerald);padding:12px 0 12px 22px;margin:28px 0;font-family:var(--serif);font-style:italic;font-size:19px;color:var(--ink);line-height:1.55;font-variation-settings:"opsz" 24}
.article-body ul,.article-body ol{margin:18px 0 22px 28px}
.article-body li{margin-bottom:10px}
.article-body code{font-family:var(--mono);font-size:14px;background:var(--paper-deep);padding:2px 6px;color:var(--ink)}
.article-body .aside{background:var(--paper-warm);border-left:2px solid var(--ochre);padding:20px 24px;margin:32px 0;font-size:15.5px;line-height:1.7;font-style:italic;color:var(--ink-soft);font-variation-settings:"opsz" 14}
.article-body .aside strong{font-style:normal;color:var(--ink)}
.article-body hr{border:none;height:1px;background:var(--rule);margin:40px 0}

.article-footer{margin-top:56px;padding-top:28px;border-top:1px solid var(--rule);font-family:var(--mono);font-size:12px;color:var(--muted);line-height:1.7}
.article-footer .tags{margin-bottom:16px;display:flex;flex-wrap:wrap;gap:8px}
.article-footer .tag{padding:3px 10px;background:var(--paper-deep);color:var(--ink-soft);font-size:10.5px;letter-spacing:.06em;text-transform:uppercase}
.article-footer .citations h4{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--emerald);margin-bottom:10px}
.article-footer .citations ol{margin-left:20px}
.article-footer .citations li{font-size:12.5px;line-height:1.6;margin-bottom:6px}
.article-footer .citations a{color:var(--emerald);text-decoration:none;border-bottom:1px solid var(--emerald)}

/* Related / next reads */
.related{margin-top:64px;padding-top:32px;border-top:1px solid var(--rule)}
.related-head{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--emerald);margin-bottom:20px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:24px}
.related-item{text-decoration:none;color:inherit}
.related-item .r-prov{font-family:var(--mono);font-size:9.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.related-item h4{font-family:var(--serif);font-size:18px;font-weight:500;line-height:1.3;color:var(--ink);transition:color .2s;font-variation-settings:"opsz" 20}
.related-item:hover h4{color:var(--emerald)}

/* ═══ INDEX / ARCHIVE LISTINGS ═══ */
.piece-list{display:flex;flex-direction:column;gap:0}
.piece{display:grid;grid-template-columns:120px 1fr 100px;gap:28px;padding:28px 0;border-top:1px solid var(--rule);align-items:baseline;text-decoration:none;color:inherit;transition:padding .25s}
.piece:last-of-type{border-bottom:1px solid var(--rule)}
.piece:hover{padding-left:8px}
.piece:hover h3{color:var(--emerald)}
.piece-date{font-family:var(--mono);font-size:10.5px;color:var(--muted);letter-spacing:.04em;padding-top:4px}
.piece-body{max-width:680px}
.piece-body .prov{margin-bottom:8px}
.piece-body h3{font-family:var(--serif);font-size:22px;font-weight:500;color:var(--ink);margin:6px 0 8px;line-height:1.3;letter-spacing:-.008em;font-variation-settings:"opsz" 24;transition:color .25s}
.piece-body h3 em{font-style:italic;font-weight:400;color:var(--muted)}
.piece-body p{font-size:15px;color:var(--muted);line-height:1.6;font-variation-settings:"opsz" 14}
.piece-read{font-family:var(--mono);font-size:10.5px;color:var(--dim);letter-spacing:.04em;text-align:right;padding-top:6px}

/* ═══ RESEARCH NOTEBOOK CARD ═══ */
.notebook-card{background:var(--paper-warm);border:1px solid var(--rule);padding:28px 32px;margin-bottom:24px;display:grid;grid-template-columns:1fr auto;gap:32px;align-items:center;transition:border-color .2s}
.notebook-card:hover{border-color:var(--ink)}
.notebook-card .nb-prov{margin-bottom:12px}
.notebook-card h3{font-family:var(--serif);font-size:24px;font-weight:500;margin-bottom:8px;line-height:1.25;font-variation-settings:"opsz" 28}
.notebook-card h3 a{color:var(--ink);text-decoration:none}
.notebook-card h3 a:hover{color:var(--emerald)}
.notebook-card p{font-size:15px;color:var(--muted);line-height:1.6;margin-bottom:10px}
.notebook-card .nb-meta{font-family:var(--mono);font-size:10.5px;color:var(--dim);letter-spacing:.06em}
.notebook-card .nb-price{font-family:var(--mono);font-size:14px;color:var(--emerald);font-weight:500;letter-spacing:.02em;white-space:nowrap;padding:10px 18px;border:1px solid var(--emerald);transition:all .2s;text-decoration:none}
.notebook-card .nb-price:hover{background:var(--emerald);color:var(--paper)}
.notebook-card .nb-price small{display:block;font-size:9.5px;font-weight:400;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin-top:2px}
.notebook-card .nb-price:hover small{color:var(--paper-warm)}

/* ═══ NOTEBOOK DETAIL (single research page) ═══ */
.nb-detail{max-width:760px;margin:0 auto}
.nb-summary{font-size:17px;line-height:1.8;color:var(--ink-soft)}
.nb-summary p{margin-bottom:18px}
.nb-summary strong{font-weight:500;color:var(--ink)}
.nb-summary em{font-style:italic;color:var(--ink)}

.paywall{margin-top:48px;padding:40px 36px;background:var(--paper-warm);border:2px solid var(--emerald);position:relative;overflow:hidden}
.paywall::before{content:'';position:absolute;top:-2px;left:-2px;right:-2px;height:2px;background:var(--emerald)}
.paywall .pw-eyebrow{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--emerald);margin-bottom:12px}
.paywall h3{font-family:var(--serif);font-size:26px;font-weight:400;margin-bottom:14px;line-height:1.25;font-variation-settings:"opsz" 32}
.paywall h3 em{font-style:italic;color:var(--muted)}
.paywall p{font-size:15.5px;color:var(--ink-soft);line-height:1.7;margin-bottom:20px;max-width:560px}
.paywall .pw-list{list-style:none;margin:20px 0 28px}
.paywall .pw-list li{padding:8px 0;font-size:14px;color:var(--ink-soft);display:flex;align-items:center;gap:10px;border-bottom:1px dashed var(--rule)}
.paywall .pw-list li:last-child{border-bottom:none}
.paywall .pw-list li::before{content:'●';color:var(--emerald);font-size:10px}
.paywall-actions{display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.paywall .pw-cta{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--paper);background:var(--emerald);padding:14px 26px;text-decoration:none;transition:background .2s}
.paywall .pw-cta:hover{background:var(--emerald-deep)}
.paywall .pw-note{font-family:var(--mono);font-size:10.5px;color:var(--muted);letter-spacing:.04em}

/* ═══ TECH TRIAL (single demo page) ═══ */
.trial-lead{display:grid;grid-template-columns:1.2fr 1fr;gap:40px;margin-bottom:48px;align-items:start}
.trial-demo-large{aspect-ratio:4/3;background:var(--ink);position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center;border:1px solid var(--rule)}
.trial-demo-large iframe{width:100%;height:100%;border:none;background:var(--paper)}
.trial-demo-large .placeholder{color:var(--paper-deep);font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-align:center;padding:20px}
.trial-info h1{font-family:var(--serif);font-size:38px;font-weight:500;line-height:1.1;margin:10px 0 12px;font-variation-settings:"opsz" 48}
.trial-info h1 em{font-style:italic;color:var(--muted);font-weight:400}
.trial-info .t-dek{font-family:var(--serif);font-size:17px;color:var(--ink-soft);font-style:italic;margin-bottom:20px;line-height:1.55;font-variation-settings:"opsz" 18}
.trial-info .t-meta{display:grid;grid-template-columns:1fr 1fr;gap:16px;padding:16px 0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);margin-bottom:20px}
.trial-info .t-meta div{font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.04em}
.trial-info .t-meta strong{display:block;color:var(--emerald);font-size:10px;margin-bottom:4px;letter-spacing:.08em;text-transform:uppercase;font-weight:500}
.trial-info .t-actions{display:flex;gap:12px;flex-wrap:wrap}
.trial-info .t-btn{font-family:var(--mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;padding:10px 18px;text-decoration:none;transition:all .2s;border:1px solid var(--ink)}
.trial-info .t-btn.primary{background:var(--ink);color:var(--paper)}
.trial-info .t-btn.primary:hover{background:var(--emerald);border-color:var(--emerald)}
.trial-info .t-btn.ghost{color:var(--ink);background:transparent}
.trial-info .t-btn.ghost:hover{background:var(--ink);color:var(--paper)}

/* ═══ ABOUT PAGE ═══ */
.about-hero{padding:48px 0;text-align:center;border-bottom:1px solid var(--rule);margin-bottom:56px}
.about-hero .a-eyebrow{font-family:var(--mono);font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--emerald);margin-bottom:14px}
.about-hero h1{font-family:var(--serif);font-size:clamp(44px,6vw,84px);font-weight:300;line-height:1.02;letter-spacing:-.02em;font-variation-settings:"opsz" 144}
.about-hero h1 em{font-style:italic;color:var(--muted)}
.about-hero .a-bn{font-family:var(--bangla);font-size:22px;color:var(--muted);margin-top:8px;font-weight:400}

.about-body{max-width:680px;margin:0 auto;font-size:18px;line-height:1.8;color:var(--ink-soft);font-variation-settings:"opsz" 16}
.about-body > p:first-of-type::first-letter{font-family:var(--serif);font-size:64px;font-weight:400;float:left;line-height:.85;margin:10px 12px 0 -4px;color:var(--emerald);font-variation-settings:"opsz" 144}
.about-body p{margin-bottom:22px}
.about-body strong{font-weight:500;color:var(--ink)}
.about-body em{font-style:italic;color:var(--ink)}
.about-body h2{font-family:var(--serif);font-size:26px;font-weight:500;margin:48px 0 18px;font-variation-settings:"opsz" 32;color:var(--ink)}
.about-body h2 em{font-style:italic;color:var(--muted);font-weight:400}

/* ═══ FOOTER ═══ */
footer{max-width:1280px;margin:0 auto;padding:48px 32px 16px;display:grid;grid-template-columns:1fr 1fr 1fr;gap:32px;align-items:start;position:relative;z-index:2;margin-top:80px;border-top:1px solid var(--rule)}
.f-col h5{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--emerald);margin-bottom:12px}
.f-col p,.f-col a{font-size:13px;color:var(--muted);line-height:1.7;font-family:var(--serif);font-variation-settings:"opsz" 14}
.f-col a{display:block;text-decoration:none;transition:color .2s}
.f-col a:hover{color:var(--emerald)}
.f-col .bn-sig{font-family:var(--bangla);font-style:italic;color:var(--ink-soft);margin-top:8px}
.colophon{max-width:1280px;margin:0 auto;padding:20px 32px 40px;border-top:1px solid var(--rule);font-family:var(--mono);font-size:10px;letter-spacing:.06em;color:var(--dim);display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;position:relative;z-index:2}

/* ═══ RESPONSIVE ═══ */
@media(max-width:960px){
  .mast-inner{grid-template-columns:1fr;gap:14px;text-align:center}
  .mast-nav{justify-content:center;flex-wrap:wrap;gap:14px}
  .page,.article-page,.index-page{padding:32px 24px}
  .piece{grid-template-columns:1fr;gap:10px;padding:22px 0}
  .piece-date,.piece-read{padding-top:0}
  .piece-read{text-align:left}
  .notebook-card{grid-template-columns:1fr;gap:20px}
  .trial-lead{grid-template-columns:1fr}
  footer{grid-template-columns:1fr;gap:28px}
  .article-body{font-size:17px}
  .trial-info h1{font-size:30px}
  .paywall{padding:28px 24px}
}