/* ==========================================================================
   SYNYG — single-page site
   Palette: cool analytical paper, journal-figure blue, assay hit red.
   Type: scholarly serif throughout; mono reserved for data (figure, sequence).
   No JavaScript. One motion moment: the hero figure draws itself once.
   ========================================================================== */

:root {
  --paper: #F6F7F4;
  --ink: #18212B;
  --ink-soft: #4A5560;
  --accent: #1D63A8;
  --accent-deep: #164E85;
  --hit: #C2382C;
  --rule: rgba(24, 33, 43, .14);
  --rule-soft: rgba(24, 33, 43, .08);
  --wash: rgba(29, 99, 168, .05);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, "Times New Roman", serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Menlo, Consolas, "Liberation Mono", monospace;
  --measure: 34em;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -moz-osx-font-smoothing: grayscale;
}

::selection { background: var(--accent); color: var(--paper); }

a { color: var(--accent-deep); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 1px;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: .5rem 1rem;
  z-index: 10;
}
.skip:focus { left: .5rem; top: .5rem; }

.wrap {
  max-width: 72rem;
  margin: 0 auto;
  padding-inline: clamp(1.25rem, 5vw, 4rem);
}

/* ---------- header ---------- */

.site-head { border-bottom: 1px solid var(--rule-soft); }

.head-in {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-block: 1.4rem 1.3rem;
}

.wordmark {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--ink);
  text-decoration: none;
}

.site-nav { display: flex; gap: 1.75rem; }

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-style: italic;
  font-size: 1rem;
}
.site-nav a:hover { color: var(--accent-deep); }

/* ---------- hero ---------- */

.hero {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 6fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
  padding-block: clamp(3.5rem, 8vw, 6.5rem) clamp(3rem, 6vw, 5rem);
}

h1 {
  font-size: clamp(2.7rem, 5.8vw, 4.3rem);
  line-height: 1.04;
  letter-spacing: -0.015em;
  font-weight: 600;
  margin: 0 0 1.6rem;
  text-wrap: balance;
}

.lede {
  max-width: var(--measure);
  margin: 0 0 2.4rem;
  color: var(--ink-soft);
  font-size: 1.14rem;
}

.cta-row { margin: 0; }

.cta {
  display: inline-block;
  background: var(--ink);
  color: var(--paper);
  font-size: 1.06rem;
  padding: .78em 1.5em;
  text-decoration: none;
  border-radius: 2px;
  transition: background-color .16s ease;
}
.cta:hover { background: var(--accent-deep); }

/* ---------- hero figure ---------- */

.hero-fig { margin: 0; }

.fig { width: 100%; height: auto; display: block; }

.hero-fig figcaption {
  margin-top: .8rem;
  font-size: .92rem;
  font-style: italic;
  color: var(--ink-soft);
}
.fig-tag { font-family: var(--mono); font-style: normal; font-size: .85rem; color: var(--ink); }

.fig-axis, .fig-tick, .fig-guide {
  fill: none;
  stroke: var(--ink);
  stroke-width: 1;
}
.fig-tick   { stroke-opacity: .55; }
.fig-guide  { stroke-dasharray: 3 4; stroke-opacity: .45; }

.fig-band {
  fill: var(--accent);
  fill-opacity: .10;
  stroke: none;
  opacity: 0;
  animation: settle .7s ease-out 1.45s forwards;
}

.fig-fit {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  animation: draw 1.15s cubic-bezier(.4, 0, .2, 1) .25s forwards;
}

.pts circle {
  fill: var(--ink);
  fill-opacity: .82;
  opacity: 0;
  animation: appear .45s ease-out var(--d) forwards;
}

.fig-num {
  font-family: var(--mono);
  font-size: 10.5px;
  fill: var(--ink-soft);
}
.fig-num .sup { font-size: 7.5px; }
.fig-note {
  font-family: var(--mono);
  font-size: 10.5px;
  fill: var(--ink);
  paint-order: stroke;
  stroke: var(--paper);
  stroke-width: 4px;
}

@keyframes draw    { to { stroke-dashoffset: 0; } }
@keyframes appear  { to { opacity: 1; } }
@keyframes settle  { to { opacity: 1; } }

/* ---------- sequence strip ---------- */

.seq-strip {
  border-top: 1px solid var(--rule-soft);
  border-bottom: 1px solid var(--rule-soft);
  padding-block: 1.1rem 1rem;
  margin-bottom: clamp(3rem, 7vw, 5.5rem);
}

.seq {
  margin: 0;
  font-family: var(--mono);
  font-size: .95rem;
  letter-spacing: .32em;
  color: var(--ink-soft);
  white-space: nowrap;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 88%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 6%, #000 88%, transparent);
}

.seq .var { color: var(--hit); }

.seq-note {
  margin: .45rem 0 0;
  font-family: var(--mono);
  font-size: .8rem;
  color: var(--hit);
  text-align: right;
}

/* ---------- shared section rhythm ---------- */

section { scroll-margin-top: 2rem; }

h2 {
  font-size: clamp(1.9rem, 3.4vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.15;
  margin: 0 0 1rem;
}

.section-lede {
  max-width: var(--measure);
  margin: 0 0 2.8rem;
  color: var(--ink-soft);
  font-size: 1.12rem;
}

.practice  { padding-bottom: clamp(3rem, 7vw, 5rem); }
.approach  { padding-block: clamp(3rem, 7vw, 5rem); border-top: 1px solid var(--rule-soft); }
.contact   { padding-block: clamp(3.5rem, 8vw, 6rem) clamp(4rem, 9vw, 7rem); border-top: 1px solid var(--rule-soft); }

/* ---------- practice index ---------- */

.index {
  list-style: none;
  margin: 0;
  padding: 0;
  border-bottom: 1px solid var(--rule);
}

.row {
  display: grid;
  grid-template-columns: 3rem 16rem 1fr;
  gap: 1.5rem;
  align-items: start;
  padding-block: 1.5rem;
  border-top: 1px solid var(--rule);
  transition: background-color .16s ease;
}
.row:hover { background: var(--wash); }

.row h3 {
  margin: .1rem 0 0;
  font-size: 1.28rem;
  font-weight: 600;
  line-height: 1.3;
  transition: color .16s ease;
}
.row:hover h3 { color: var(--accent-deep); }

.row p {
  margin: 0;
  max-width: 30em;
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.glyph {
  width: 1.9rem;
  height: 1.9rem;
  margin-top: .35rem;
  overflow: visible;
}

.gl-st {
  fill: none;
  stroke: var(--ink-soft);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: stroke .16s ease;
}
.row:hover .gl-st { stroke: var(--accent); }

.gl-f { fill: var(--ink-soft); transition: fill .16s ease; }
.row:hover .gl-f { fill: var(--accent); }

.gl-dash {
  fill: none;
  stroke: var(--ink-soft);
  stroke-width: 1.2;
  stroke-dasharray: 2 2.5;
}

/* ---------- approach ---------- */

.tickaxis {
  width: 100%;
  height: 22px;
  display: block;
  margin-bottom: 1.6rem;
}
.ta-base { stroke: var(--rule); stroke-width: 1; fill: none; }
.ta-tick { stroke: var(--ink-soft); stroke-width: 1.5; fill: none; }

.cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 3.5vw, 3rem);
}

.col h3 {
  margin: 0 0 .6rem;
  font-size: 1.22rem;
  font-weight: 600;
}

.col p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.02rem;
  max-width: 24em;
}

/* ---------- contact ---------- */

.bigmail {
  display: inline-block;
  margin-top: .4rem;
  font-size: clamp(1.55rem, 4.2vw, 2.5rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--accent-deep);
  text-decoration: none;
  border-bottom: 2px solid var(--accent);
  padding-bottom: .12em;
  transition: color .16s ease, border-color .16s ease;
  overflow-wrap: anywhere;
}
.bigmail:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- footer ---------- */

.site-foot { border-top: 1px solid var(--rule-soft); }

.foot-in {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding-block: 1.3rem 1.5rem;
}

.foot-in p { margin: 0; font-size: .95rem; color: var(--ink-soft); }
.foot-dom { font-family: var(--mono); font-size: .85rem; }

/* ---------- responsive ---------- */

@media (max-width: 62rem) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 3rem;
  }
  .hero-fig { max-width: 34rem; }
  .row { grid-template-columns: 3rem 1fr; }
  .row p { grid-column: 2; max-width: none; }
}

@media (max-width: 40rem) {
  .cols { grid-template-columns: 1fr; gap: 1.8rem; }
  .head-in { flex-direction: column; align-items: flex-start; gap: .6rem; }
  .lede { font-size: 1.06rem; }
}

/* ---------- reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .fig-band, .pts circle { opacity: 1; animation: none; }
  .fig-fit { stroke-dasharray: none; stroke-dashoffset: 0; animation: none; }
  * { transition: none !important; }
}