/* ============================================================
   David Peralta — "Signal" (data-luxe dark)
   Vanilla CSS. One stylesheet, shared by both pages.
   ============================================================ */

/* ---- Tokens ---- */
:root {
  --bg: #070B14;
  --surface: #0D1526;
  --surface-2: #111C33;
  --glass: rgba(255, 255, 255, 0.04);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #E8EDF7;
  --text-2: #8FA0B8;
  --text-3: #64748B;
  --accent: #22D3EE;
  --accent-2: #60A5FA;
  --accent-soft: rgba(34, 211, 238, 0.14);

  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", monospace;

  --maxw: 1140px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --radius: 12px;
  --radius-sm: 8px;

  --section-y: clamp(4.5rem, 11vw, 8rem);
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in: cubic-bezier(0.55, 0, 0.9, 0.35);
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; overflow-x: hidden; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 600; line-height: 1.08; letter-spacing: -0.02em; }
b, strong { font-weight: 600; color: var(--text); }

::selection { background: rgba(34, 211, 238, 0.28); color: #fff; }

/* ---- Layout helpers ---- */
.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }

.section { padding-block: var(--section-y); }

.skip-link {
  position: fixed; top: 0; left: 50%; transform: translate(-50%, -120%);
  z-index: 200; background: var(--accent); color: #041016;
  font-family: var(--font-mono); font-size: 0.85rem; font-weight: 500;
  padding: 0.6rem 1rem; border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  transition: transform 0.2s var(--ease-out);
}
.skip-link:focus-visible { transform: translate(-50%, 0); outline: none; }

/* ---- Shared type atoms ---- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.7875rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-2);
}
.eyebrow__idx { color: var(--accent); }

.icon { width: 1.25em; height: 1.25em; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.icon--sm { width: 1.05em; height: 1.05em; }

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: sticky; top: 0; z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background 0.3s var(--ease-out), border-color 0.3s var(--ease-out), backdrop-filter 0.3s var(--ease-out);
}
.nav.is-scrolled {
  background: rgba(9, 14, 24, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; min-height: 72px; gap: 1rem; }

.nav__brand { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--text); font-family: var(--font-display); font-weight: 600; letter-spacing: -0.01em; }
.nav__mark { color: var(--accent); display: inline-flex; }
.nav__name { font-size: 1.02rem; }

.nav__links { display: flex; align-items: center; gap: clamp(1.25rem, 2.4vw, 2.25rem); }
.nav__links > a:not(.btn) {
  position: relative; font-size: 0.94rem; color: var(--text-2);
  padding: 0.4rem 0; transition: color 0.2s var(--ease-out);
}
.nav__links > a:not(.btn)::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: -2px; height: 1.5px;
  background: var(--accent); transition: right 0.25s var(--ease-out);
}
.nav__links > a:not(.btn):hover { color: var(--text); }
.nav__links > a:not(.btn):hover::after { right: 0; }
.nav__links > a[aria-current="page"] { color: var(--text); }
.nav__links > a[aria-current="page"]::after { right: 0; background: var(--border-strong); }

.nav__toggle { display: none; }

/* ---- Buttons ---- */
.btn {
  --btn-pad-y: 0.72rem; --btn-pad-x: 1.35rem;
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  font-family: var(--font-body); font-size: 0.95rem; font-weight: 500;
  padding: var(--btn-pad-y) var(--btn-pad-x); border-radius: var(--radius-sm);
  border: 1px solid transparent; cursor: pointer; white-space: nowrap;
  min-height: 44px;
  transition: transform 0.2s var(--ease-out), background 0.2s var(--ease-out), border-color 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out), color 0.2s var(--ease-out);
}
.btn .icon { transition: transform 0.2s var(--ease-out); }
.btn:hover .icon { transform: translateX(3px); }

.btn--primary {
  background: var(--accent); color: #041016; font-weight: 600;
  box-shadow: 0 0 0 rgba(34, 211, 238, 0);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(34, 211, 238, 0.28); }

.btn--ghost { color: var(--text); border-color: var(--border-strong); background: var(--glass); }
.btn--ghost:hover { transform: translateY(-2px); border-color: rgba(34, 211, 238, 0.5); box-shadow: 0 0 24px rgba(34, 211, 238, 0.12); }

.btn--nav {
  color: var(--text); border-color: var(--border-strong);
  background: var(--glass); --btn-pad-y: 0.55rem; --btn-pad-x: 1.1rem; min-height: 40px;
}
.btn--nav:hover { border-color: rgba(34, 211, 238, 0.55); box-shadow: 0 0 22px rgba(34, 211, 238, 0.15); color: #fff; }

.btn--lg { --btn-pad-x: 1.9rem; font-size: 1.02rem; font-family: var(--font-mono); font-weight: 500; letter-spacing: -0.01em; }

/* ---- Mobile menu ---- */
.mobile-menu {
  position: fixed; inset: 0; z-index: 99;
  background: rgba(7, 11, 20, 0.92);
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  display: grid; place-items: center;
  opacity: 0; visibility: hidden; transition: opacity 0.3s var(--ease-out), visibility 0.3s;
}
.mobile-menu[hidden] { display: grid; }
.mobile-menu.is-open { opacity: 1; visibility: visible; }
.mobile-menu__links { display: flex; flex-direction: column; align-items: center; gap: 1.75rem; text-align: center; }
.mobile-menu__links > a:not(.btn) {
  font-family: var(--font-display); font-size: 1.9rem; font-weight: 600; color: var(--text);
  opacity: 0; transform: translateY(14px);
}
.mobile-menu.is-open .mobile-menu__links > a { animation: menuIn 0.5s var(--ease-out) forwards; }
.mobile-menu.is-open .mobile-menu__links > a:nth-child(1) { animation-delay: 0.06s; }
.mobile-menu.is-open .mobile-menu__links > a:nth-child(2) { animation-delay: 0.12s; }
.mobile-menu.is-open .mobile-menu__links > a:nth-child(3) { animation-delay: 0.18s; }
.mobile-menu.is-open .mobile-menu__links > a:nth-child(4) { animation-delay: 0.24s; }
.mobile-menu__cta { opacity: 0; transform: translateY(14px); margin-top: 0.5rem; }
@keyframes menuIn { to { opacity: 1; transform: translateY(0); } }

/* ============================================================
   HERO
   ============================================================ */
.hero { position: relative; overflow: hidden; padding-top: clamp(3.5rem, 8vw, 6rem); padding-bottom: var(--section-y); }
.hero__bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.hero__inner { position: relative; z-index: 1; }

.glow { position: absolute; border-radius: 50%; filter: blur(70px); opacity: 0.6; }
.glow--1 { width: 46vw; height: 46vw; max-width: 620px; max-height: 620px; top: -12%; left: -8%; background: radial-gradient(circle, rgba(34, 211, 238, 0.30), transparent 68%); animation: drift1 34s ease-in-out infinite; }
.glow--2 { width: 40vw; height: 40vw; max-width: 540px; max-height: 540px; top: -6%; right: -10%; background: radial-gradient(circle, rgba(96, 165, 250, 0.24), transparent 66%); animation: drift2 42s ease-in-out infinite; }
.glow--3 { width: 34vw; height: 34vw; max-width: 460px; max-height: 460px; bottom: -18%; left: 32%; background: radial-gradient(circle, rgba(34, 211, 238, 0.16), transparent 68%); animation: drift3 38s ease-in-out infinite; }

@keyframes drift1 { 0%, 100% { transform: translate3d(0,0,0) scale(1); } 50% { transform: translate3d(6%, 5%, 0) scale(1.12); } }
@keyframes drift2 { 0%, 100% { transform: translate3d(0,0,0) scale(1); } 50% { transform: translate3d(-5%, 7%, 0) scale(1.08); } }
@keyframes drift3 { 0%, 100% { transform: translate3d(0,0,0) scale(1); } 50% { transform: translate3d(4%, -6%, 0) scale(1.14); } }

.hero__grid, .page-head__bg .hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 40%, transparent 100%);
}

.hero__title {
  font-size: clamp(2.75rem, 6vw, 5rem);
  font-weight: 700; line-height: 1.05; letter-spacing: -0.03em;
  max-width: 16ch; margin-top: 1.25rem;
  text-wrap: balance;
}
.hero__lede {
  margin-top: 1.6rem; max-width: 60ch; font-size: clamp(1.05rem, 1.6vw, 1.22rem);
  color: var(--text-2); line-height: 1.6;
}
.hero__cta { margin-top: 2.25rem; display: flex; flex-wrap: wrap; gap: 0.9rem; }

/* ---- Stat strip / instrument panel ---- */
.stat-strip {
  margin-top: clamp(3rem, 6vw, 4.5rem);
  display: grid; grid-template-columns: repeat(4, 1fr);
  background: var(--glass);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden;
}
.stat-strip__cell { padding: clamp(1.15rem, 2vw, 1.75rem); border-left: 1px solid var(--border); position: relative; }
.stat-strip__cell:first-child { border-left: none; }
.stat-strip__cell::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(34,211,238,0.5), transparent);
  opacity: 0; transition: opacity 0.4s var(--ease-out);
}
.stat-strip__cell:hover::before { opacity: 1; }

.stat-strip__value {
  font-family: var(--font-mono); font-weight: 500;
  font-size: clamp(2rem, 3.6vw, 2.9rem); line-height: 1; color: var(--text);
  letter-spacing: -0.02em; display: flex; align-items: baseline;
}
.stat-strip__value .num { font-variant-numeric: tabular-nums; }
.stat-strip__suffix { color: var(--accent); margin-left: 0.06em; }
.stat-strip__label {
  margin-top: 0.85rem; font-size: 0.82rem; line-height: 1.4; color: var(--text-2);
}

/* ============================================================
   SECTION HEADS
   ============================================================ */
.section__head { max-width: 62ch; margin-bottom: clamp(2.5rem, 5vw, 3.75rem); }
.section__title { font-size: clamp(1.9rem, 3.6vw, 2.85rem); margin-top: 0.9rem; letter-spacing: -0.025em; }
.section__intro { margin-top: 1.25rem; color: var(--text-2); font-size: 1.1rem; max-width: 58ch; }

/* ============================================================
   RESULTS GRID (home)
   ============================================================ */
.result-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
.result-card {
  position: relative; display: flex; flex-direction: column;
  padding: clamp(1.6rem, 2.6vw, 2.25rem);
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  transition: transform 0.25s var(--ease-out), border-color 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out), background 0.25s var(--ease-out);
}
.result-card:hover {
  transform: translateY(-4px); border-color: var(--border-strong);
  background: var(--surface-2);
  box-shadow: 0 18px 44px rgba(0,0,0,0.4), 0 0 0 1px rgba(34,211,238,0.12), 0 0 40px rgba(34,211,238,0.08);
}
.result-card__kicker {
  font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--text-2);
}
.result-card__stat {
  margin-top: 1rem; font-family: var(--font-mono); font-weight: 500;
  font-size: clamp(1.35rem, 2.4vw, 1.9rem); line-height: 1.15; color: var(--accent);
  letter-spacing: -0.02em; font-variant-numeric: tabular-nums;
}
.result-card__stat span { display: block; font-family: var(--font-body); font-weight: 400; font-size: 0.92rem; color: var(--text-2); letter-spacing: normal; margin-top: 0.35rem; }
.result-card__body { margin-top: 1.1rem; color: var(--text-2); font-size: 1rem; flex: 1; }
.result-card__link {
  margin-top: 1.5rem; display: inline-flex; align-items: center; gap: 0.45rem;
  font-family: var(--font-mono); font-size: 0.82rem; letter-spacing: 0.06em; color: var(--text);
}
.result-card__link .icon { transition: transform 0.2s var(--ease-out); color: var(--accent); }
.result-card:hover .result-card__link .icon { transform: translateX(4px); }

/* ============================================================
   PROCESS (how I work)
   ============================================================ */
.process { list-style: none; padding: 0; display: grid; gap: 1.25rem; counter-reset: none; }
.process__step {
  display: grid; grid-template-columns: auto 1fr; gap: clamp(1.25rem, 3vw, 2.5rem); align-items: start;
  padding: clamp(1.6rem, 2.6vw, 2.25rem);
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  transition: border-color 0.25s var(--ease-out), background 0.25s var(--ease-out);
}
.process__step:hover { border-color: var(--border-strong); background: var(--surface-2); }
.process__index {
  font-family: var(--font-mono); font-weight: 500; font-size: clamp(1.5rem, 3vw, 2.25rem);
  color: var(--accent); line-height: 1;
  -webkit-text-stroke: 0.5px rgba(34,211,238,0.6); text-shadow: 0 0 20px rgba(34,211,238,0.25);
}
.process__title { font-size: 1.3rem; font-weight: 600; margin-bottom: 0.55rem; }
.process__body p { color: var(--text-2); max-width: 62ch; }

/* ============================================================
   SERVICES
   ============================================================ */
.service-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
.service-card {
  padding: clamp(1.6rem, 2.6vw, 2.25rem);
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  transition: transform 0.25s var(--ease-out), border-color 0.25s var(--ease-out), box-shadow 0.25s var(--ease-out), background 0.25s var(--ease-out);
}
.service-card:hover {
  transform: translateY(-4px); border-color: var(--border-strong); background: var(--surface-2);
  box-shadow: 0 18px 44px rgba(0,0,0,0.4), 0 0 34px rgba(34,211,238,0.07);
}
.service-card__icon {
  display: inline-flex; align-items: center; justify-content: center;
  width: 46px; height: 46px; border-radius: 11px; margin-bottom: 1.25rem;
  color: var(--accent); background: var(--accent-soft); border: 1px solid rgba(34,211,238,0.22);
}
.service-card__icon .icon { width: 22px; height: 22px; }
.service-card__title { font-size: 1.22rem; font-weight: 600; margin-bottom: 0.6rem; }
.service-card p { color: var(--text-2); font-size: 1rem; }

/* ============================================================
   ABOUT
   ============================================================ */
.section--about .about { max-width: 72ch; }
.about__body { margin-top: 1.5rem; font-size: clamp(1.15rem, 1.8vw, 1.4rem); line-height: 1.55; color: var(--text); font-weight: 400; }

/* ============================================================
   CTA
   ============================================================ */
.cta__panel {
  position: relative; overflow: hidden; text-align: center;
  padding: clamp(2.75rem, 6vw, 5rem) clamp(1.5rem, 5vw, 4rem);
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  border: 1px solid var(--border-strong); border-radius: 20px;
}
.cta__glow {
  position: absolute; top: -40%; left: 50%; transform: translateX(-50%);
  width: 80%; height: 120%; pointer-events: none;
  background: radial-gradient(ellipse at center, rgba(34,211,238,0.18), transparent 62%);
}
.cta__panel > * { position: relative; }
.cta__body { margin: 1.35rem auto 0; max-width: 54ch; color: var(--text-2); font-size: 1.1rem; }
.cta__panel .btn--lg { margin-top: 2.25rem; }
.cta__note { margin-top: 1.2rem; font-family: var(--font-mono); font-size: 0.85rem; color: var(--text-2); }

/* ============================================================
   FOOTER
   ============================================================ */
.footer { border-top: 1px solid var(--border); padding-block: 3rem; }
.footer__inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.5rem; }
.footer__brand { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--text); font-size: 0.95rem; }
.footer__brand .nav__mark { color: var(--accent); }
.footer__links { display: flex; flex-wrap: wrap; gap: 1.25rem 1.75rem; }
.footer__links a { font-size: 0.9rem; color: var(--text-2); position: relative; transition: color 0.2s var(--ease-out); }
.footer__links a:hover { color: var(--accent); }
.footer__copy { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-3); }

/* ============================================================
   CASE STUDIES — page head
   ============================================================ */
.page-head { position: relative; overflow: hidden; padding-top: clamp(3rem, 7vw, 5rem); padding-bottom: clamp(3rem, 6vw, 4.5rem); }
.page-head__bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.page-head__bg .glow--1 { top: -30%; left: 20%; opacity: 0.5; }
.page-head > .container { position: relative; z-index: 1; }
.page-head__title { font-size: clamp(2.75rem, 6.5vw, 4.75rem); font-weight: 700; letter-spacing: -0.03em; margin-top: 1rem; }
.page-head__intro { margin-top: 1.75rem; max-width: 68ch; color: var(--text-2); font-size: clamp(1.05rem, 1.6vw, 1.2rem); }
.page-head__note {
  margin-top: 1.75rem; display: inline-flex; align-items: center; gap: 0.6rem;
  font-size: 0.9rem; color: var(--text-2);
  padding: 0.7rem 1.1rem; background: var(--glass); border: 1px solid var(--border); border-radius: 999px;
}
.page-head__note .icon { color: var(--accent); flex-shrink: 0; }

/* ============================================================
   STUDY
   ============================================================ */
.study { padding-block: clamp(3.5rem, 8vw, 6.5rem); border-top: 1px solid var(--border); scroll-margin-top: 84px; }
.study:first-of-type { border-top: none; }

.study__head { margin-bottom: clamp(2.25rem, 4vw, 3.25rem); }
.study__title-row { margin-top: 1rem; display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.75rem 1.5rem; }
.study__title { font-size: clamp(1.85rem, 4vw, 3rem); font-weight: 700; letter-spacing: -0.025em; }
.study__tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tag {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-2); padding: 0.35rem 0.7rem; border: 1px solid var(--border); border-radius: 999px; background: var(--glass);
}
.tag--muted { color: var(--text-3); }
.study__descriptor { margin-top: 1.15rem; font-size: clamp(1.1rem, 1.8vw, 1.35rem); color: var(--text); max-width: 56ch; line-height: 1.5; }

.study__grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: clamp(1.75rem, 4vw, 3.5rem); align-items: start; }
.study__narrative { display: grid; gap: 1.75rem; }
.prose-block__label {
  font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 0.7rem; font-weight: 500;
}
.prose-block p { color: var(--text-2); max-width: 62ch; }

.study__results {
  padding: clamp(1.5rem, 2.6vw, 2rem);
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  position: sticky; top: 96px;
}
.result-list { display: grid; gap: 1.1rem; margin-top: 0.4rem; }
.result-list__item { padding-bottom: 1.1rem; border-bottom: 1px solid var(--border); }
.result-list__item:last-child { padding-bottom: 0; border-bottom: none; }
.result-list dt {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-3); margin-bottom: 0.4rem;
}
.result-list dd { color: var(--text-2); font-size: 0.98rem; line-height: 1.5; }
.result-list__num {
  font-family: var(--font-mono); color: var(--accent); font-weight: 500;
  font-variant-numeric: tabular-nums; font-size: 1.02rem;
}

/* ---- Takeaway ---- */
.study__takeaway {
  margin-top: clamp(2.25rem, 4vw, 3.25rem);
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 1rem;
  font-family: var(--font-display); font-size: clamp(1.2rem, 2.2vw, 1.6rem); font-weight: 600;
  line-height: 1.4; letter-spacing: -0.015em; color: var(--text);
  padding-left: 1.25rem; border-left: 2px solid var(--accent);
}
.study__takeaway-mark {
  font-family: var(--font-mono); font-size: 0.72rem; font-weight: 500; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--accent); padding: 0.3rem 0.65rem; border: 1px solid rgba(34,211,238,0.3); border-radius: 999px;
  align-self: center; flex-shrink: 0;
}

/* ============================================================
   CHARTS
   ============================================================ */
.chart-figure { margin-top: clamp(2.5rem, 5vw, 3.75rem); }
.chart-figure__title {
  font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-2); margin-bottom: 1.1rem;
}
.chart-scroll { width: 100%; }
.chart--line { width: 100%; max-width: 920px; height: auto; margin-inline: auto; }
/* mobile-fitted line charts are hidden on desktop; swapped in below the 768px breakpoint */
.chart--mobile { display: none; }

/* chart parts */
.chart__grid line { stroke: rgba(255,255,255,0.07); stroke-width: 1; }
.chart__tick text { font-family: var(--font-mono); font-size: 15px; fill: var(--text-3); font-variant-numeric: tabular-nums; }
.chart__area { opacity: 0; transition: opacity 0.8s var(--ease-out); }
.chart__line {
  fill: none; stroke: var(--accent); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round;
  filter: drop-shadow(0 0 6px rgba(34,211,238,0.5));
}
.chart__dot { fill: var(--accent); stroke: var(--bg); stroke-width: 2.5; filter: drop-shadow(0 0 5px rgba(34,211,238,0.55)); }
.chart__dot--muted { fill: var(--text-3); filter: none; }
.chart__dot--annot { fill: var(--accent); }
.chart__label { font-family: var(--font-mono); font-size: 16px; font-variant-numeric: tabular-nums; }
.chart__label--hi { fill: var(--text); font-weight: 500; }
.chart__label--muted { fill: var(--text-3); font-size: 14px; }

.chart__annot-line { stroke: rgba(34,211,238,0.55); stroke-width: 1.5; stroke-dasharray: 4 4; }
.chart__annot-pill { fill: rgba(34,211,238,0.10); stroke: rgba(34,211,238,0.35); stroke-width: 1; }
.chart__annot-text { font-family: var(--font-mono); font-size: 13px; fill: var(--accent); letter-spacing: 0.02em; }

/* draw-on animation */
.chart__line.is-draw {
  stroke-dasharray: var(--len); stroke-dashoffset: var(--len);
}
.chart__line.is-draw.is-drawn {
  stroke-dashoffset: 0; transition: stroke-dashoffset 1.5s var(--ease-out);
}
.chart-figure.is-visible .chart__area { opacity: 1; transition-delay: 1.1s; }

.chart-caption { margin-top: 1.1rem; font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.04em; color: var(--text-3); text-align: center; }

/* ---- Sparklines (in tiles) ---- */
.sparkline { width: 100%; height: 70px; margin-block: 0.9rem; }
.sparkline__area { opacity: 0; transition: opacity 0.7s var(--ease-out) 0.9s; }
.sparkline__line { fill: none; stroke: var(--accent); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; filter: drop-shadow(0 0 5px rgba(34,211,238,0.45)); }
.sparkline__dot { fill: var(--accent); stroke: var(--surface); stroke-width: 2; }
.is-visible .sparkline__area { opacity: 1; }

/* ---- Tiles ---- */
.tile-grid { margin-top: clamp(2rem, 4vw, 3rem); display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.25rem; }
.tile-grid--three { grid-template-columns: repeat(3, 1fr); }
.tile {
  padding: clamp(1.5rem, 2.6vw, 2rem);
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  transition: border-color 0.25s var(--ease-out); display: flex; flex-direction: column;
}
.tile:hover { border-color: var(--border-strong); }
.tile__label { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-2); line-height: 1.4; }
.tile__value {
  margin-top: 0.6rem; font-family: var(--font-mono); font-weight: 500; font-size: clamp(1.25rem, 2.4vw, 1.7rem);
  color: var(--text); font-variant-numeric: tabular-nums; letter-spacing: -0.01em;
}
.tile__arrow { color: var(--accent); padding-inline: 0.15em; }
.tile__sub { margin-top: auto; padding-top: 0.5rem; font-size: 0.92rem; color: var(--text-2); }
.tile--stat { align-items: flex-start; }
.tile__big {
  font-family: var(--font-mono); font-weight: 500; font-size: clamp(2.4rem, 5vw, 3.4rem);
  color: var(--accent); line-height: 1; letter-spacing: -0.02em;
  text-shadow: 0 0 26px rgba(34,211,238,0.28);
}
.tile__big .num { font-variant-numeric: tabular-nums; }
.tile__big-suffix { color: var(--accent); }
.tile--stat .tile__label { margin-top: 1rem; }

/* ---- Bar charts (Study 2) ---- */
.chart-duo { margin-top: clamp(2.5rem, 5vw, 3.75rem); display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 1.25rem; align-items: stretch; }
.chart-figure--half { margin-top: 0; padding: clamp(1.5rem, 2.6vw, 2rem); background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }

.barchart { display: flex; align-items: flex-end; gap: clamp(1.5rem, 5vw, 3rem); height: 260px; padding-top: 1.5rem; justify-content: center; }
.barchart__col { display: flex; flex-direction: column; align-items: center; height: 100%; justify-content: flex-end; width: 82px; }
.barchart__track { width: 100%; height: 100%; display: flex; align-items: flex-end; }
.barchart__fill {
  width: 100%; height: var(--h); border-radius: 5px 5px 0 0;
  background: linear-gradient(180deg, var(--accent), rgba(34,211,238,0.55));
  box-shadow: 0 0 24px rgba(34,211,238,0.3); transform-origin: bottom; min-height: 4px;
  transform: scaleY(1);
}
.barchart__fill--muted { background: linear-gradient(180deg, var(--text-3), rgba(100,116,139,0.5)); box-shadow: none; }
.barchart__val { font-family: var(--font-mono); font-size: 1.15rem; color: var(--text-2); margin-bottom: 0.6rem; font-variant-numeric: tabular-nums; }
.barchart__val--hi { color: var(--accent); font-weight: 500; }
.barchart__cat { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); margin-top: 0.9rem; }
.is-anim .barchart__fill { transform: scaleY(0); }
.is-anim.is-visible .barchart__fill { transform: scaleY(1); transition: transform 1s var(--ease-out); }

.hbars { display: grid; gap: 1.75rem; height: 260px; align-content: center; padding-inline: 0.25rem; }
.hbars__row { display: grid; grid-template-columns: 1fr; gap: 0.55rem; }
.hbars__label { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); }
.hbars__track { display: flex; align-items: center; gap: 0.75rem; }
.hbars__fill {
  height: 22px; width: var(--w); border-radius: 0 5px 5px 0; transform-origin: left; min-width: 8px;
  background: linear-gradient(90deg, rgba(34,211,238,0.55), var(--accent)); box-shadow: 0 0 20px rgba(34,211,238,0.28);
}
.hbars__fill--muted { background: linear-gradient(90deg, rgba(100,116,139,0.5), var(--text-3)); box-shadow: none; }
.hbars__val { font-family: var(--font-mono); font-size: 1.15rem; color: var(--text-2); font-variant-numeric: tabular-nums; white-space: nowrap; }
.hbars__val--hi { color: var(--accent); font-weight: 500; }
.is-anim .hbars__fill { transform: scaleX(0); }
.is-anim.is-visible .hbars__fill { transform: scaleX(1); transition: transform 1s var(--ease-out); }
.is-anim .hbars__row:nth-child(2) .hbars__fill { transition-delay: 0.12s; }

/* ============================================================
   MOTION — reveals
   ============================================================ */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out); }
.reveal.is-visible { opacity: 1; transform: none; }

/* ============================================================
   FOCUS
   ============================================================ */
:where(a, button, [tabindex]):focus-visible {
  outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 3px;
}
.btn:focus-visible { outline-offset: 3px; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .study__grid { grid-template-columns: 1fr; }
  .study__results { position: static; }
}

@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__toggle {
    display: inline-flex; align-items: center; justify-content: center;
    width: 44px; height: 44px; background: transparent; border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm); color: var(--text); cursor: pointer;
  }
  .nav__toggle-bars { position: relative; width: 20px; height: 12px; display: block; }
  .nav__toggle-bars span { position: absolute; left: 0; width: 100%; height: 1.5px; background: currentColor; transition: transform 0.3s var(--ease-out), opacity 0.2s; }
  .nav__toggle-bars span:nth-child(1) { top: 0; }
  .nav__toggle-bars span:nth-child(2) { bottom: 0; }
  .nav__toggle[aria-expanded="true"] .nav__toggle-bars span:nth-child(1) { top: 5px; transform: rotate(45deg); }
  .nav__toggle[aria-expanded="true"] .nav__toggle-bars span:nth-child(2) { bottom: 5px; transform: rotate(-45deg); }

  .result-grid, .service-grid { grid-template-columns: 1fr; }
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
  .stat-strip__cell:nth-child(3) { border-left: none; }
  .stat-strip__cell:nth-child(n+3)::after { content: ""; position: absolute; top: 0; left: var(--gutter); right: var(--gutter); height: 1px; background: var(--border); }
  .stat-strip__cell { border-top: 1px solid var(--border); }
  .stat-strip__cell:nth-child(1), .stat-strip__cell:nth-child(2) { border-top: none; }

  .tile-grid, .tile-grid--three, .chart-duo { grid-template-columns: 1fr; }

  /* dense time-series charts: swap the wide desktop SVG for a fitted mobile one that shows the whole curve without scrolling */
  .chart--desktop { display: none; }
  .chart--mobile { display: block; max-width: 440px; }
}

@media (max-width: 480px) {
  .barchart { gap: 2rem; }
  .footer__inner { flex-direction: column; align-items: flex-start; }
  .study__takeaway { font-size: 1.15rem; }
}

/* ============================================================
   REDUCED MOTION — everything final-state, no ambient loops
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .glow { animation: none !important; }
  .reveal { opacity: 1 !important; transform: none !important; }
  .chart__area, .sparkline__area { opacity: 1 !important; }
  .chart__line.is-draw { stroke-dasharray: none !important; stroke-dashoffset: 0 !important; }
  .barchart__fill, .hbars__fill { transform: none !important; }
  .mobile-menu.is-open .mobile-menu__links > a { opacity: 1 !important; transform: none !important; animation: none !important; }
}