/* /research (16 Oct 2026): the dark side of the site. Same Inter, same blue; night background, a monospace
   voice for data and figure captions, signal colours for the four pattern types. */
body[data-page="research"] {
  --rs-bg: #06080c; --rs-surface: #0d1117; --rs-line: rgba(255,255,255,.08); --rs-text: #e9edf3; --rs-dim: #8a94a6;
  --rs-blue: #4ea1ff; --rs-teal: #4fe0c0; --rs-amber: #ffb547; --rs-violet: #b49cff; --rs-red: #ff6b6b;
  --rs-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  background: var(--rs-bg); color: var(--rs-text);
}
body[data-page="research"] header { background: rgba(6,8,12,.72); border-bottom-color: var(--rs-line); }
body[data-page="research"] header .logo span, body[data-page="research"] .nav-links > a:not(.nav-cta):not(.nav-donate) { color: var(--rs-text); }
body[data-page="research"] .search-btn svg { stroke: var(--rs-text); }
body[data-page="research"] .menu-btn span { background: var(--rs-text); }
body[data-page="research"] footer { background: var(--rs-bg); border-top: 1px solid var(--rs-line); color: var(--rs-dim); }
body[data-page="research"] footer a { color: var(--rs-dim); }
body[data-page="research"] main { max-width: none; padding: 0; }

.rs { position: relative; overflow: hidden; }
.rs::before { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image: linear-gradient(var(--rs-line) 1px, transparent 1px), linear-gradient(90deg, var(--rs-line) 1px, transparent 1px);
  background-size: 64px 64px; mask-image: linear-gradient(to bottom, #000 0, transparent 900px); -webkit-mask-image: linear-gradient(to bottom, #000 0, transparent 900px); }
.rs a { color: inherit; text-decoration: none; }
.rs-mono, .rs-fig, .rs-label, .rs-kicker { font-family: var(--rs-mono); letter-spacing: 0; }
.rs-dim { color: var(--rs-dim); }
.rs-teal { color: var(--rs-teal); } .rs-amber { color: var(--rs-amber); } .rs-violet { color: var(--rs-violet); } .rs-blue { color: var(--rs-blue); }

/* hero */
.rs-hero { position: relative; min-height: min(92vh, 860px); display: flex; flex-direction: column; justify-content: center; padding: 6rem 2rem 3rem; max-width: 1200px; margin: 0 auto; }
.rs-hero-chart { position: absolute; left: 40%; right: 0; top: 40%; height: 46%; width: 60%; opacity: 1;
  mask-image: linear-gradient(90deg, transparent 0, #000 30%); -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 30%); }
.rs-hero-text { position: relative; max-width: 760px; }
.rs-kicker { display: inline-flex; align-items: center; gap: .6rem; font-size: .78rem; color: var(--rs-teal); text-transform: uppercase; margin: 0 0 1.4rem; }
.rs-pulse { width: 7px; height: 7px; border-radius: 50%; background: var(--rs-teal); box-shadow: 0 0 0 0 rgba(79,224,192,.6); animation: rs-pulse 2.4s infinite; }
@keyframes rs-pulse { 70% { box-shadow: 0 0 0 10px rgba(79,224,192,0); } 100% { box-shadow: 0 0 0 0 rgba(79,224,192,0); } }
.rs-hero h1 { font-size: clamp(2.4rem, 6.2vw, 4.6rem); line-height: 1.02; letter-spacing: -.045em; font-weight: 700; margin: 0 0 1.4rem; }
.rs-hero h1 span { color: var(--rs-dim); font-weight: 600; }
.rs-lead { font-size: clamp(1.02rem, 1.6vw, 1.2rem); color: #c3cad6; max-width: 640px; margin: 0 0 2rem; text-shadow: 0 0 14px var(--rs-bg), 0 0 6px var(--rs-bg), 0 0 2px var(--rs-bg); }
.rs-ctas { display: flex; flex-wrap: wrap; gap: 1.2rem; align-items: center; }
.rs-btn { display: inline-block; background: var(--rs-text); color: var(--rs-bg) !important; padding: .8rem 1.5rem; border-radius: 980px; font-weight: 600; transition: transform .2s, background .2s; }
.rs-btn:hover { transform: translateY(-1px); background: #fff; }
.rs-link { color: var(--rs-blue) !important; font-weight: 500; }
.rs-fig { font-size: .72rem; color: var(--rs-dim); margin: 1rem 0 0; }
.rs-hero-fig { position: relative; margin-top: auto; padding-top: 3rem; }
.rs-hero-chart .pt { fill: rgba(233,237,243,.6); }
.rs-hero-chart .trend { fill: none; stroke: var(--rs-teal); stroke-width: 2.5; filter: drop-shadow(0 0 8px rgba(79,224,192,.55)); }
.rs-hero-chart .band { fill: rgba(79,224,192,.08); }

/* sections */
.rs-sec { position: relative; max-width: 1120px; margin: 0 auto; padding: 7rem 2rem; border-top: 1px solid var(--rs-line); }
.rs-label { font-size: .75rem; color: var(--rs-dim); text-transform: uppercase; margin: 0 0 1rem; }
.rs-sec h2 { font-size: clamp(1.9rem, 4vw, 3rem); letter-spacing: -.035em; line-height: 1.08; margin: 0 0 1rem; font-weight: 700; }
.rs-sub { color: #b4bcc9; max-width: 680px; font-size: 1.05rem; margin: 0 0 3rem; }
.rs-note { color: #b4bcc9; max-width: 720px; margin: 2.5rem 0 0; font-size: 1.05rem; }
.rs-small { font-size: .86rem; margin-top: 1.2rem; }

.rs-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin-top: 2.4rem; }
.rs-card { background: var(--rs-surface); border: 1px solid var(--rs-line); border-radius: 20px; padding: 1.8rem; }
.rs-card p { margin: 0 0 .6rem; }
.rs-card-hi { border-color: rgba(79,224,192,.35); box-shadow: 0 0 60px -20px rgba(79,224,192,.35) inset; }
.rs-big { font-size: clamp(2.4rem, 5vw, 3.6rem); font-weight: 700; letter-spacing: -.04em; line-height: 1.1; }
.rs-big small { font-size: .9rem; font-weight: 500; letter-spacing: 0; color: var(--rs-dim); }

.rs-methods { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.2rem; }
.rs-method { background: var(--rs-surface); border: 1px solid var(--rs-line); border-radius: 20px; padding: 1.6rem; }
.rs-method h3 { font-size: 1.25rem; letter-spacing: -.02em; margin: .3rem 0 .6rem; }
.rs-method p { margin: 0; color: #b4bcc9; font-size: .96rem; }
.rs-method p.rs-mono { font-size: .76rem; margin-top: 1rem; }
.rs-method p.rs-teal { color: var(--rs-teal); } .rs-method p.rs-amber { color: var(--rs-amber); }
.rs-method p.rs-violet { color: var(--rs-violet); } .rs-method p.rs-blue { color: var(--rs-blue); }
.rs-mini { width: 100%; height: auto; display: block; border-radius: 12px; background: rgba(255,255,255,.02); }
.rs-mini .pt { fill: rgba(233,237,243,.45); } .rs-mini .axis { stroke: var(--rs-line); }
.rs-mini .ln { fill: none; stroke-width: 2; }

.rs-rule { margin-top: 2.4rem; padding: 2rem; border-radius: 20px; border: 1px dashed rgba(255,255,255,.16); }
.rs-rule p { margin: 0; }
.rs-formula { font-family: var(--rs-mono); font-size: clamp(1.3rem, 3vw, 2rem); margin: .8rem 0 1rem !important; color: var(--rs-text); }
.rs-formula span { color: var(--rs-teal); } .rs-formula em { color: var(--rs-dim); font-style: normal; padding: 0 .4rem; }

.rs-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.rs-stat { border-left: 1px solid var(--rs-line); padding: .2rem 0 .2rem 1.4rem; }
.rs-stat p { margin: 0; color: #b4bcc9; font-size: .95rem; }
.rs-num { font-family: var(--rs-mono); font-size: clamp(2.4rem, 5vw, 3.4rem) !important; color: var(--rs-text) !important; letter-spacing: -.03em; margin-bottom: .6rem !important; }
.rs-num.rs-amber { color: var(--rs-amber) !important; } .rs-num.rs-teal { color: var(--rs-teal) !important; }

.rs-sens { margin-top: 3.6rem; background: var(--rs-surface); border: 1px solid var(--rs-line); border-radius: 20px; padding: 1.8rem; }
.rs-sens > p.rs-mono { font-size: .74rem; margin: 0 0 1.4rem; }
.rs-bar { display: grid; grid-template-columns: 220px 1fr 56px; align-items: center; gap: 1rem; margin: .7rem 0; font-size: .92rem; }
.rs-bar i { display: block; height: 10px; border-radius: 6px; background: linear-gradient(90deg, var(--rs-teal), var(--rs-blue)); width: 0; transition: width 1.4s cubic-bezier(.2,.8,.2,1); }
.rs-bar.rs-weak i { background: linear-gradient(90deg, var(--rs-amber), var(--rs-red)); }
.rs-bar b { font-family: var(--rs-mono); font-weight: 500; text-align: right; }

.rs-nots { list-style: none; padding: 0; margin: 2.4rem 0 0; }
.rs-nots li { display: grid; grid-template-columns: minmax(180px, 280px) 1fr; gap: 1.6rem; padding: 1.4rem 0; border-bottom: 1px solid var(--rs-line); align-items: baseline; }
.rs-nots s { font-size: clamp(1.3rem, 2.6vw, 1.9rem); font-weight: 700; letter-spacing: -.03em; text-decoration: none; position: relative; color: var(--rs-text); }
.rs-nots s::after { content: ""; position: absolute; left: 0; top: 55%; height: 2px; width: var(--strike, 0%); background: var(--rs-red); transition: width .9s ease .2s; }
.rs-nots li.in s::after { --strike: 100%; }
.rs-nots span { color: #b4bcc9; }

.rs-repro { display: grid; grid-template-columns: 1fr 1.15fr; gap: 3rem; align-items: start; }
.rs-repro .rs-sub { margin-bottom: 0; }
.rs-repro .rs-fig { grid-column: 2; margin-top: -2rem; }
.rs-code { margin: 0; background: #0a0d12; border: 1px solid var(--rs-line); border-radius: 16px; padding: 1.4rem 1.5rem; overflow-x: auto;
  font-family: var(--rs-mono); font-size: .78rem; line-height: 1.75; color: #c3cad6; white-space: pre; }
.rs-code .k { color: var(--rs-blue); } .rs-code .s { color: var(--rs-teal); } .rs-code .n { color: var(--rs-amber); }

.rs-doors { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.rs-door { display: flex; flex-direction: column; background: var(--rs-surface); border: 1px solid var(--rs-line); border-radius: 20px; padding: 1.6rem; transition: border-color .25s, transform .25s; }
.rs-door:hover { border-color: rgba(255,255,255,.24); transform: translateY(-3px); }
.rs-door p { margin: 0 0 1rem; color: #b4bcc9; font-size: .95rem; }
.rs-door p.rs-mono { font-size: .74rem; text-transform: uppercase; margin-bottom: .5rem; }
.rs-door p.rs-teal { color: var(--rs-teal); } .rs-door p.rs-violet { color: var(--rs-violet); } .rs-door p.rs-amber { color: var(--rs-amber); }
.rs-door h3 { font-size: 1.35rem; letter-spacing: -.02em; margin: 0 0 .6rem; }
.rs-go { margin-top: auto; font-weight: 600; color: var(--rs-text); }
.rs-foot { font-size: .74rem; color: var(--rs-dim); margin: 3rem 0 0; }

/* reveal (JS adds .in; without JS everything is visible) */
.rs-js .rs-reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s ease, transform .8s cubic-bezier(.2,.8,.2,1); }
.rs-js .rs-reveal.in { opacity: 1; transform: none; }

@media (max-width: 860px) {
  .rs-hero { padding: 5rem 16px 2rem; min-height: 0; }
  .rs-hero-chart { inset: auto 0 4rem 0; height: 40%; opacity: .45; }
  .rs-sec { padding: 4.5rem 16px; }
  .rs-compare, .rs-methods, .rs-stats, .rs-doors, .rs-repro { grid-template-columns: 1fr; }
  .rs-repro .rs-fig { grid-column: 1; margin-top: 0; }
  .rs-bar { grid-template-columns: 1fr 48px; } .rs-bar span { grid-column: 1 / -1; }
  .rs-nots li { grid-template-columns: 1fr; gap: .4rem; }
}
@media (prefers-reduced-motion: reduce) {
  .rs-js .rs-reveal { opacity: 1; transform: none; transition: none; }
  .rs-bar i, .rs-nots s::after { transition: none; }
  .rs-pulse { animation: none; }
}