/* Buoycast visual system. DeepMind-publication aesthetic: vast white space,
   immaculate type, one accent (#1257a0), quiet scroll-reveal as the only motion.
   Font: Lora everywhere; data aligns via tabular figures. */

:root {
  --bg: #ffffff;
  --panel: #ffffff;
  --rule: #ececec;        /* hairline */
  --rule-soft: #f4f4f4;
  --ink: #16181d;         /* near-black */
  --muted: #5b6470;       /* caption ink */
  --faint: #8a929c;
  --accent: #1257a0;      /* the only saturated color */
  --accent-soft: #eef3fa;
  --amber: #b45309;       /* reserved for chart series only */
  /* one family everywhere; labels differentiate by size, weight, spacing,
     and numbers stay aligned via tabular figures */
  --serif: 'Lora', Georgia, 'Times New Roman', serif;
  --sans: 'Lora', Georgia, serif;
  --mono: 'Lora', Georgia, serif;
  --maxw: 1140px;
  --gutter: clamp(1.25rem, 5vw, 3rem);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--accent-soft); }

/* =========================================================
   Sticky top bar (shared)
   ========================================================= */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, backdrop-filter 0.25s ease, background 0.25s ease;
}
.nav.is-scrolled {
  border-bottom-color: var(--rule);
  background: rgba(255, 255, 255, 0.9);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  backdrop-filter: saturate(180%) blur(10px);
}
.nav__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0.85rem var(--gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.nav__brand {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.22em;
  color: var(--ink);
  text-decoration: none;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}
.nav__brand::before {
  content: "";
  width: 14px; height: 14px;
  background: var(--accent);
  border-radius: 3px;
  display: inline-block;
}

/* floating pill nav: the soft highlight slides between items on hover and
   glides home to the current page on leave */
.pill {
  position: relative;
  display: flex;
  align-items: center;
  background: #fff;
  border: 1px solid #ececec;
  border-radius: 14px;
  padding: 5px;
  box-shadow: 0 1px 6px rgba(20, 24, 30, 0.05);
}
.pill a {
  position: relative;
  z-index: 1;
  font-family: var(--serif);
  font-size: 0.95rem;
  padding: 0.42rem 1rem;
  color: var(--muted);
  text-decoration: none;
  border-radius: 9px;
  transition: color 0.18s ease;
  white-space: nowrap;
}
.pill a:hover { color: var(--ink); }
.pill a[aria-current="page"] { color: var(--ink); font-weight: 500; }
.pill__hl {
  position: absolute;
  top: 5px; bottom: 5px; left: 0;
  width: 0;
  background: #f2f1ef;
  border-radius: 9px;
  transition: transform 0.24s cubic-bezier(0.3, 0.9, 0.35, 1),
              width 0.24s cubic-bezier(0.3, 0.9, 0.35, 1);
  will-change: transform, width;
}

/* numbers everywhere align in columns even in the serif */
b, td, th, .count, .hero__big {
  font-variant-numeric: lining-nums tabular-nums;
}

/* =========================================================
   Layout container
   ========================================================= */
.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* =========================================================
   Dashboard hero
   ========================================================= */
.hero {
  padding: clamp(3.5rem, 9vw, 7rem) 0 clamp(2.5rem, 6vw, 4.5rem);
}
.hero__kicker {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.9rem;
}
.hero__big {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(4.5rem, 12vw, 6rem);
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0;
  font-variant-numeric: tabular-nums;
}
.hero__title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2.6rem, 6vw, 3.9rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0;
}
.hero .figure { margin-top: clamp(2rem, 5vw, 3.2rem); }

/* the live reading, demoted from hero to its own numbered section */
.now__big {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(3rem, 7vw, 4.2rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 0 0 0.4rem;
  font-variant-numeric: tabular-nums;
}
.hero__lede {
  font-size: clamp(1.05rem, 2vw, 1.22rem);
  line-height: 1.6;
  color: var(--muted);
  max-width: 40rem;
  margin: 1.4rem 0 0;
}
.hero__now {
  display: flex;
  flex-wrap: wrap;
  gap: 2.2rem 3rem;
  margin: 2.4rem 0 0;
  padding-top: 1.8rem;
  border-top: 1px solid var(--rule);
}
.hero__now > div { min-width: 0; }
.hero__now span {
  display: block;
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 0.35rem;
}
.hero__now b {
  font-family: var(--mono);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

/* =========================================================
   Numbered sections
   ========================================================= */
.section {
  padding: clamp(4rem, 9vw, 8.75rem) 0 0;
}
.section--first { padding-top: clamp(2.5rem, 5vw, 4rem); }

.section__head {
  margin: 0 0 2rem;
  max-width: 46rem;
}
.section__num {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--accent);
}
.section__title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.18;
  letter-spacing: -0.015em;
  margin: 0.55rem 0 0;
  color: var(--ink);
}
.section__title + .caption { margin-top: 0.9rem; }

/* sub-blocks within a single numbered section (e.g. "Under the hood") */
.block { margin-top: clamp(2.6rem, 5vw, 3.8rem); }
.block:first-of-type { margin-top: 0; }
.block__title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.15rem, 2vw, 1.35rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ink);
  margin: 0 0 1.3rem;
}

/* figure caption: muted, paper-like, narrow measure */
.caption {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--muted);
  max-width: 65ch;
  margin: 1.1rem 0 0;
}
.caption--tight { margin-top: 0.8rem; }

/* =========================================================
   Cards / figures (borderless or hairline, no shadow)
   ========================================================= */
.figure { min-width: 0; }
.figure--bordered {
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: clamp(1.4rem, 3vw, 2rem);
}

.subhead {
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0 0 0.9rem;
}

canvas { width: 100%; display: block; }

/* stat strip */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
}
.chip {
  flex: 1 1 140px;
  padding: 1.3rem 1.4rem 1.4rem;
  border-left: 1px solid var(--rule);
}
.chip:first-child { border-left: none; padding-left: 0; }
.chip span {
  display: block;
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 0.45rem;
  line-height: 1.35;
}
.chip b {
  font-family: var(--mono);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

/* two-up panels */
.duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(1.8rem, 4vw, 3rem);
}
.duo h3 {
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0 0 0.9rem;
}

/* daily digest */
.digest {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0;
}
.digest__day {
  padding: 1.2rem 0.4rem 1.3rem;
  text-align: center;
  border-left: 1px solid var(--rule);
}
.digest__day:first-child { border-left: none; }
.digest__label {
  display: block;
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
}
.digest__day b {
  display: block;
  font-family: var(--mono);
  font-size: 1.65rem;
  font-weight: 500;
  color: var(--ink);
  margin: 0.4rem 0 0.2rem;
  font-variant-numeric: tabular-nums;
}
.digest__range {
  display: block;
  font-family: var(--mono);
  font-size: 0.66rem;
  color: var(--muted);
}

/* methodology */
.method {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: clamp(2rem, 4vw, 3rem);
}
.method h3 {
  font-family: var(--mono);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 0.7rem;
}
.method p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--muted);
}

/* validation table */
.tablewrap { overflow-x: auto; }
#stat-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
}
#stat-table th {
  text-align: right;
  font-weight: 500;
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
  padding: 0.45rem 0.8rem 0.6rem;
  border-bottom: 1.5px solid var(--rule);
}
#stat-table td {
  text-align: right;
  padding: 0.45rem 0.8rem;
  border-bottom: 1px solid var(--rule-soft);
  color: var(--ink);
}
#stat-table tr:last-child td { border-bottom: none; }
#stat-table th:first-child, #stat-table td:first-child { text-align: left; color: var(--muted); }
#stat-table tbody tr:hover td { background: var(--accent-soft); }

/* =========================================================
   Footer (shared)
   ========================================================= */
.foot {
  margin-top: clamp(4rem, 8vw, 7rem);
  border-top: 1px solid var(--rule);
}
.foot__inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 2.6rem var(--gutter) 3.4rem;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.6rem 3rem;
  align-items: start;
}
.foot__inner p {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--faint);
  max-width: 52ch;
}
.foot__inner a { color: var(--accent); text-decoration: none; }
.foot__inner a:hover { text-decoration: underline; }
.foot__credit { display: inline-block; margin-top: 0.7rem; color: var(--faint); }
.foot__credit a { color: var(--faint); }
.foot__credit a:hover { color: var(--accent); text-decoration: none; }
.foot__nav {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  text-align: right;
}
.foot__nav a {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}
.foot__nav a:hover { color: var(--accent); text-decoration: none; }

/* =========================================================
   Scroll reveal (the only motion)
   ========================================================= */
.reveal {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.5s ease, transform 0.5s ease;
  will-change: opacity, transform;
}
.reveal.is-in {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* =========================================================
   Dashboard responsive
   ========================================================= */
@media (max-width: 720px) {
  body { font-size: 15px; }
  .nav__brand { font-size: 0; gap: 0; }  /* square only; the pill carries the nav */
  .pill a { padding: 0.42rem 0.7rem; font-size: 0.88rem; }
  .duo { grid-template-columns: 1fr; }
  .digest { grid-template-columns: repeat(4, 1fr); }
  .digest__day:nth-child(4n + 1) { border-left: none; }
  .hero__now { gap: 1.6rem 2.4rem; }
  .foot__inner { grid-template-columns: 1fr; }
  .foot__nav { text-align: left; flex-flow: row wrap; gap: 1.2rem; }
}

/* =========================================================
   /ml explainer page
   ========================================================= */
.ml-hero {
  padding: clamp(3.5rem, 9vw, 6.5rem) 0 clamp(2rem, 5vw, 3.5rem);
  max-width: 46rem;
}
.ml-hero__kicker {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 1rem;
}
.ml-hero h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(2.3rem, 5vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin: 0 0 1.1rem;
}
.ml-hero p {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  line-height: 1.6;
  color: var(--muted);
  margin: 0;
}

.ml-step {
  padding: clamp(3.5rem, 8vw, 7rem) 0 0;
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(2.5rem, 5vw, 4rem);
  align-items: center;
}
.ml-step__text .num {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}
.ml-step__text h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.5rem, 3vw, 1.95rem);
  line-height: 1.18;
  letter-spacing: -0.015em;
  margin: 0.6rem 0 1rem;
}
.ml-step__text p {
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--muted);
  margin: 0 0 0.9rem;
}
.ml-step__text p:last-child { margin-bottom: 0; }
.ml-step__text b { color: var(--ink); font-weight: 600; }

/* full-width "whole machine" section */
.ml-wide {
  padding: clamp(3.5rem, 8vw, 7rem) 0 0;
}
.ml-wide__head { max-width: 46rem; margin: 0 0 2.2rem; }
.ml-wide__head .num {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}
.ml-wide__head h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.5rem, 3vw, 1.95rem);
  line-height: 1.18;
  letter-spacing: -0.015em;
  margin: 0.6rem 0 1rem;
}
.ml-wide__head p {
  font-size: 0.98rem;
  line-height: 1.7;
  color: var(--muted);
  margin: 0;
}
.ml-wide__head b { color: var(--ink); font-weight: 600; }

/* figure shell */
.ml-fig {
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 1.3rem 1.4rem 1.1rem;
}
.ml-fig canvas { width: 100%; display: block; }
.ml-fig__cap {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.04em;
  color: var(--faint);
  margin: 0.8rem 0 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
}
.ml-fig__cap button {
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.05em;
  color: var(--accent);
  background: none;
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: 0.3rem 0.65rem;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.18s ease, border-color 0.18s ease;
}
.ml-fig__cap button:hover { background: var(--accent-soft); border-color: var(--accent-soft); }
.ml-fig input[type=range] { width: 100%; accent-color: var(--accent); margin: 0.7rem 0 0.1rem; }

.ml-counters {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.8rem 2.4rem;
}
.ml-counters .c b {
  display: block;
  font-family: var(--mono);
  font-size: clamp(1.7rem, 3vw, 2.1rem);
  font-weight: 500;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.ml-counters .c span {
  font-size: 0.82rem;
  color: var(--muted);
  display: block;
  margin-top: 0.4rem;
}

/* "where it stands" */
.ml-next { padding: clamp(3.5rem, 8vw, 7rem) 0 0; }
.ml-next > h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.5rem, 3vw, 1.95rem);
  letter-spacing: -0.015em;
  margin: 0 0 0.7rem;
}
.ml-next > p {
  color: var(--muted);
  font-size: 1.02rem;
  margin: 0 0 2.2rem;
  max-width: 46rem;
}
.next-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: clamp(1.2rem, 3vw, 1.8rem);
}
.next-card {
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 1.5rem 1.6rem 1.6rem;
}
.next-card .tag {
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}
.next-card h3 {
  font-family: var(--serif);
  font-size: 1.18rem;
  font-weight: 600;
  margin: 0.5rem 0 0.6rem;
}
.next-card p {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--muted);
  margin: 0;
}
.next-card .lift {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.04em;
  color: var(--amber);
  margin-top: 0.9rem;
  display: block;
}

/* /ml scoreboard table */
.ml-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 0.8rem;
  font-variant-numeric: tabular-nums;
}
.ml-table th {
  text-align: right;
  font-weight: 500;
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--faint);
  padding: 0.4rem 0.7rem 0.5rem;
  border-bottom: 1.5px solid var(--rule);
}
.ml-table td {
  text-align: right;
  padding: 0.45rem 0.7rem;
  border-bottom: 1px solid var(--rule-soft);
  color: var(--ink);
}
.ml-table tr:last-child td { border-bottom: none; }
.ml-table th:first-child, .ml-table td:first-child { text-align: left; color: var(--muted); }
.ml-table td.win { color: var(--accent); font-weight: 600; }
.ml-table td.tie { color: var(--faint); }

@media (max-width: 720px) {
  .ml-step { grid-template-columns: 1fr; gap: 1.8rem; }
  .ml-counters { grid-template-columns: repeat(2, 1fr); gap: 1.4rem; }
}