/* ===== Tokens ===== */
:root {
  --bg: #F7F4EC;
  --ink: #17160F;
  --ink-soft: rgba(23,22,15,0.62);
  --ink-faint: rgba(23,22,15,0.34);
  --blue: #2A46E8;
  --rust: #C1502E;
  --wine: #732334;
  --teal: #2B7A6F;
  --line: rgba(23,22,15,0.16);
  --grid-line: rgba(23,22,15,0.07);

  --f-display: 'Space Grotesk', sans-serif;
  --f-body: 'Newsreader', serif;
  --f-mono: 'JetBrains Mono', monospace;

  --edge: 20px;
}

/* Night drafting-table mode: warmer black, electric blue, amber glow */
:root[data-theme="dark"] {
  --bg: #121110;
  --ink: #F3EEE2;
  --ink-soft: rgba(243,238,226,0.66);
  --ink-faint: rgba(243,238,226,0.36);
  --blue: #6E8CFF;
  --rust: #FF9354;
  --wine: #D65C72;
  --teal: #4FBBAA;
  --line: rgba(243,238,226,0.16);
  --grid-line: rgba(243,238,226,0.07);
}

body,
.corner::before, .corner::after,
.pill, .case__diagram-wrap {
  transition: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease;
}

@media (min-width: 720px) {
  :root { --edge: 32px; }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 17px;
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

::selection { background: var(--wine); color: var(--bg); }

a { color: inherit; }

.tag {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  white-space: nowrap;
}

/* ===== Corner crosshairs ===== */
.corner {
  position: fixed;
  width: 13px;
  height: 13px;
  z-index: 50;
  pointer-events: none;
  opacity: 0.5;
  animation: corner-breathe 5s ease-in-out infinite;
}
.corner::before, .corner::after {
  content: "";
  position: absolute;
  background: var(--ink);
}
.corner::before { width: 100%; height: 1px; top: 50%; left: 0; }
.corner::after { width: 1px; height: 100%; left: 50%; top: 0; }
.corner--bl { bottom: var(--edge); left: var(--edge); }
.corner--br { bottom: var(--edge); right: var(--edge); animation-delay: 2.5s; }
@keyframes corner-breathe {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 0.75; }
}
@media (prefers-reduced-motion: reduce) {
  .corner { animation: none; opacity: 0.5; }
}

/* ===== Ambient background field ===== */
.ambient {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}
.ambient span {
  position: absolute;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--ink-faint);
  animation: drift linear infinite;
}
@keyframes drift {
  0%   { transform: translate(0, 0); opacity: 0.15; }
  50%  { opacity: 0.5; }
  100% { transform: translate(var(--dx), var(--dy)); opacity: 0.15; }
}
@media (prefers-reduced-motion: reduce) {
  .ambient { display: none; }
}

/* ===== Grain texture ===== */
.grain {
  position: fixed;
  inset: 0;
  z-index: 95;
  pointer-events: none;
  opacity: 0.36;
  mix-blend-mode: overlay;
  background-image: url("assets/noise.svg");
  background-size: 80px 80px;
}
:root[data-theme="dark"] .grain { opacity: 0.46; mix-blend-mode: soft-light; }

/* ===== Cursor accent dot ===== */
.cursor-dot {
  position: fixed;
  top: 0; left: 0;
  width: 8px;
  height: 8px;
  margin: -4px 0 0 -4px;
  border-radius: 50%;
  border: 1px solid var(--wine);
  z-index: 60;
  pointer-events: none;
  --cx: -100px;
  --cy: -100px;
  --cs: 1;
  transform: translate(var(--cx), var(--cy)) scale(var(--cs));
  transition: transform 0.12s ease-out, opacity 0.3s ease, background 0.3s ease;
  opacity: 0;
}
.cursor-dot.is-active { opacity: 0.8; }
.cursor-dot.is-hovering { background: var(--wine); --cs: 1.8; }
@media (hover: none), (prefers-reduced-motion: reduce) {
  .cursor-dot { display: none; }
}

/* ===== Chrome header ===== */
.chrome {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 40;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  justify-content: space-between;
  align-items: center;
  padding: 20px var(--edge) 0;
}
.chrome__brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--f-mono);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.08em;
}
.chrome__mark {
  width: 46px;
  height: 46px;
  flex-shrink: 0;
  animation: chrome-mark-spin 26s linear infinite;
}
@keyframes chrome-mark-spin {
  to { transform: rotate(360deg); }
}
@media (prefers-reduced-motion: reduce) {
  .chrome__mark { animation: none; }
}
.chrome__meta { display: flex; align-items: center; gap: 18px; }
.chrome__meta .tag { font-size: 13px; }

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  position: relative;
  transition: border-color 0.4s ease, transform 0.3s ease;
}
.theme-toggle:hover { border-color: var(--wine); transform: rotate(20deg); }
.theme-toggle__icon {
  width: 18px;
  height: 18px;
  stroke: currentColor;
  stroke-width: 1.5;
  position: absolute;
  transition: opacity 0.3s ease, transform 0.4s ease;
}
.theme-toggle__icon--sun { opacity: 1; transform: scale(1) rotate(0deg); }
.theme-toggle__icon--moon { opacity: 0; transform: scale(0.5) rotate(-40deg); }
:root[data-theme="dark"] .theme-toggle__icon--sun { opacity: 0; transform: scale(0.5) rotate(40deg); }
:root[data-theme="dark"] .theme-toggle__icon--moon { opacity: 1; transform: scale(1) rotate(0deg); }

/* ===== Layout scaffolding ===== */
main { padding: 0 var(--edge); }
section {
  max-width: 1040px;
  margin: 0 auto;
  padding-top: 100px;
  padding-bottom: 70px;
}

.section-label { display: block; margin-bottom: 28px; }

/* ===== Reveal-on-scroll ===== */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ===== Hero ===== */
.hero {
  padding-top: 120px;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
}
.hero__index { display: block; margin-bottom: 18px; }
.hero__title {
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(1.85rem, 6vw, 4.2rem);
  line-height: 0.98;
  letter-spacing: -0.01em;
  margin: 0 0 40px;
  max-width: min(17.5ch, 100%);
  overflow-wrap: break-word;
}
.hero__title em {
  font-style: normal;
  color: var(--wine);
}

.hero__stage {
  position: relative;
  width: 100%;
  max-width: 640px;
  margin: 10px auto 30px;
  aspect-ratio: 640 / 460;
}
.hero__diagram { width: 100%; height: auto; aspect-ratio: 640 / 460; display: block; }
.aperture-edges line { opacity: 0.45; }
.aperture-nodes circle {
  opacity: 0.95;
  transition: fill 0.25s ease, r 0.25s ease;
  cursor: pointer;
}
.aperture-nodes circle:hover { fill: var(--wine); r: 9; }
.aperture-edges line {
  stroke-dasharray: 260;
  stroke-dashoffset: 260;
  transition: stroke-dashoffset 1.4s ease;
}
.aperture-scallop,
.aperture-ring {
  stroke-dasharray: 1400;
  stroke-dashoffset: 1400;
  transition: stroke-dashoffset 2.4s ease;
}
.hero__stage.is-visible .aperture-edges line,
.hero__stage.is-visible .aperture-scallop,
.hero__stage.is-visible .aperture-ring {
  stroke-dashoffset: 0;
}
.aperture-nodes circle,
.aperture-hub {
  opacity: 0;
  transform: scale(0.4);
  transform-box: fill-box;
  transform-origin: center;
  transition: opacity 0.5s ease, transform 0.5s ease, fill 0.25s ease, r 0.25s ease;
}
.hero__stage.is-visible .aperture-nodes circle,
.hero__stage.is-visible .aperture-hub {
  opacity: 0.95;
  transform: scale(1);
}
@media (prefers-reduced-motion: reduce) {
  .aperture-edges line, .aperture-scallop { stroke-dashoffset: 0; transition: none; }
  .aperture-nodes circle, .aperture-hub { opacity: 0.95; transform: scale(1); transition: none; }
}

.callout {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
}
.callout__dot {
  width: 6px; height: 6px;
  background: var(--ink);
  flex-shrink: 0;
}
.callout__line { width: 60px; height: 24px; flex-shrink: 0; overflow: visible; }
.callout__line path { stroke: var(--ink-faint); stroke-width: 1; fill: none; }

.callout--a { top: 4%; left: 2%; flex-direction: row; }
.callout--b { top: 8%; right: 0%; flex-direction: row-reverse; text-align: right; }
.callout--c { bottom: 2%; left: 46%; flex-direction: column; }
.callout--c .callout__line { width: 24px; height: 40px; }
.callout--c .callout__label { text-align: center; }
.callout__label { white-space: normal; }

@media (max-width: 720px) {
  .hero__stage {
    max-width: none;
    width: 100vw;
    margin: 10px calc(50% - 50vw) 24px;
    padding: 0 10px;
  }
  .callout {
    position: static;
    display: flex;
    justify-content: center;
    margin: 0 auto 12px;
  }
  .callout__line { display: none; }
}

.hero__sub {
  max-width: 56ch;
  margin: 0 auto;
  font-size: 1.05rem;
  color: var(--ink-soft);
  text-align: center;
}

/* ===== About ===== */
.about__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}
@media (min-width: 800px) {
  .about__grid { grid-template-columns: 1.6fr 1fr; gap: 60px; }
}
.about__text {
  font-size: 1.2rem;
  line-height: 1.65;
  margin: 0;
}
.about__side {
  display: flex;
  flex-direction: column;
  gap: 34px;
}
.about__facts {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-top: 6px;
}
.fact {
  border-left: 2px solid var(--wine);
  padding-left: 12px;
  font-size: 15px;
  white-space: normal;
}

.about__sprout { max-width: 220px; margin: 0; }
@media (max-width: 799px) {
  .about__sprout { margin: 0 auto; }
}
.about__sprout svg {
  width: 100%;
  height: auto;
  display: block;
  transform-origin: 50% 100%;
  transition: transform 0.5s ease;
}
.about__sprout:hover svg { transform: rotate(-3deg); }

.grow {
  stroke: var(--ink-faint);
  stroke-width: 1.4;
  stroke-linecap: round;
  fill: none;
  stroke-dasharray: 260;
  stroke-dashoffset: 260;
  transition: stroke-dashoffset 1s ease;
}
.about__sprout.is-visible .grow { stroke-dashoffset: 0; }

.joint {
  fill: var(--bg);
  stroke: var(--ink-faint);
  stroke-width: 1.2;
}

.bud {
  opacity: 0;
  transform: scale(0.3);
  transform-box: fill-box;
  transform-origin: center;
  transition: opacity .5s ease, transform .5s ease;
  animation: bud-pulse 3.6s ease-in-out infinite;
  animation-play-state: paused;
}
.about__sprout.is-visible .bud {
  opacity: 1;
  transform: scale(1);
  animation-play-state: running;
}
.bud--wine { fill: var(--wine); }
.bud--blue { fill: var(--blue); }

@keyframes bud-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.25); }
}
@media (prefers-reduced-motion: reduce) {
  .grow { stroke-dashoffset: 0; transition: none; }
  .bud { opacity: 1; transform: scale(1); animation: none; }
}

.about__signal {
  width: 100%;
  margin-top: 12px;
}
.about__signal svg { width: 100%; height: 70px; display: block; }

.signal-spine {
  stroke-dasharray: 1100;
  stroke-dashoffset: 1100;
  transition: stroke-dashoffset 1.6s ease;
}
.about__signal.is-visible .signal-spine { stroke-dashoffset: 0; }

.signal-bar {
  opacity: 0;
  transform: scaleY(0.2);
  transform-box: fill-box;
  transform-origin: center;
  transition: opacity 0.4s ease, transform 0.4s ease, stroke 0.6s ease;
}
.about__signal.is-visible .signal-bar { opacity: 1; transform: scaleY(1); }

@media (prefers-reduced-motion: reduce) {
  .signal-spine { stroke-dashoffset: 0; transition: none; }
  .signal-bar { opacity: 1; transform: scaleY(1); transition: none; }
}

/* ===== Experience — timeline ===== */
.timeline {
  padding: 8px 0 12px;
}
.timeline__track {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 48px 36px;
  position: relative;
  padding-top: 40px;
}
.timeline__track::before {
  content: "";
  position: absolute;
  top: 26px;
  left: 50%;
  transform: translateX(-50%);
  width: min(800px, 100%);
  height: 1px;
  background: var(--line);
}

.case.tl-item {
  display: block;
  flex: 0 1 380px;
  position: relative;
  padding: 0;
  border-top: none;
}
.tl-item__year {
  position: absolute;
  top: 0;
  left: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.03em;
}
.tl-item .case__diagram-wrap { margin-top: 34px; }
.tl-item .case__text { margin-top: 20px; }

.case__diagram-wrap {
  position: relative;
  cursor: pointer;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 20px 20px;
  border: 1px solid var(--line);
  padding: 10px;
  overflow: hidden;
  transition: border-color 0.3s ease;
}
.case__diagram-wrap:hover { border-color: var(--wine); }
.case__diagram-wrap:hover .case__diagram { transform: scale(1.045); }
.case__diagram { width: 100%; height: auto; display: block; transition: transform 0.4s ease; }

.case__diagram .draw path,
.case__diagram .draw line,
.case__diagram .draw rect,
.case__diagram .draw circle {
  stroke-dasharray: 240;
  stroke-dashoffset: 240;
  transition: stroke-dashoffset 1.6s ease;
}
.case.is-visible .case__diagram .draw path,
.case.is-visible .case__diagram .draw line,
.case.is-visible .case__diagram .draw rect,
.case.is-visible .case__diagram .draw circle {
  stroke-dashoffset: 0;
}
.case__diagram .draw [fill="var(--rust)"],
.case__diagram .draw [fill="var(--teal)"] {
  opacity: 0;
  transform: scale(0.5);
  transform-box: fill-box;
  transform-origin: center;
  transition: opacity 0.5s ease 1.3s, transform 0.5s ease 1.3s;
}
.case.is-visible .case__diagram .draw [fill="var(--rust)"],
.case.is-visible .case__diagram .draw [fill="var(--teal)"] {
  opacity: 1;
  transform: scale(1);
}
.hub-pulse {
  transition: fill 0.2s ease, r 0.2s ease;
}

@media (prefers-reduced-motion: reduce) {
  .case__diagram .draw path,
  .case__diagram .draw line,
  .case__diagram .draw rect,
  .case__diagram .draw circle {
    stroke-dashoffset: 0;
    transition: none;
  }
  .case__diagram .draw [fill="var(--rust)"],
  .case__diagram .draw [fill="var(--teal)"] {
    opacity: 1;
    transform: scale(1);
    transition: none;
  }
  .hub-pulse { transition: none; }
}

.case__meta { display: block; margin-bottom: 12px; font-size: 13px; white-space: normal; }
.case__meta--wine { color: var(--wine); }
.case__meta--blue { color: var(--blue); }
.case__meta--rust { color: var(--rust); }
.case__meta--teal { color: var(--teal); }
.case__toggle {
  display: block;
  width: 100%;
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
}
.case__text h3 {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(1.6rem, 2.4vw + 1rem, 2rem);
  line-height: 1.25;
  margin: 0;
}
.case__toggle-icon {
  position: relative;
  display: inline-block;
  vertical-align: middle;
  width: 30px;
  height: 30px;
  margin-left: 12px;
  margin-bottom: 6px;
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  transition: border-color 0.25s ease, background-color 0.25s ease, transform 0.25s ease;
}
.case__toggle-icon::before,
.case__toggle-icon::after {
  content: "";
  position: absolute;
  background: var(--ink);
  transition: transform 0.3s ease, background 0.25s ease;
}
.case__toggle-icon::before { top: 50%; left: 22%; width: 56%; height: 2px; margin-top: -1px; }
.case__toggle-icon::after { left: 50%; top: 22%; height: 56%; width: 2px; margin-left: -1px; }
.case__toggle:hover .case__toggle-icon,
.case__toggle:focus-visible .case__toggle-icon {
  border-color: var(--wine);
  background-color: var(--wine);
  transform: scale(1.08);
}
.case__toggle:hover .case__toggle-icon::before,
.case__toggle:hover .case__toggle-icon::after,
.case__toggle:focus-visible .case__toggle-icon::before,
.case__toggle:focus-visible .case__toggle-icon::after { background: var(--bg); }
.case.is-open .case__toggle-icon { border-color: var(--wine); }
.case.is-open .case__toggle-icon::after { transform: rotate(90deg); opacity: 0; }
.case.is-open .case__toggle-icon::before { transform: rotate(180deg); background: var(--wine); }
.case.is-open .case__toggle:hover .case__toggle-icon::before,
.case.is-open .case__toggle:hover .case__toggle-icon::after { background: var(--bg); }

.case__detail {
  margin: 0;
  color: var(--ink-soft);
  max-width: 62ch;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.5s ease, opacity 0.4s ease, margin-top 0.4s ease;
}
.case.is-open .case__detail {
  max-height: 320px;
  opacity: 1;
  margin-top: 14px;
}
@media (prefers-reduced-motion: reduce) {
  .case__toggle-icon::before, .case__toggle-icon::after { transition: none; }
  .case__detail { transition: none; }
}

/* ===== Contact ===== */
.contact { text-align: center; }

.contact__stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 40px;
}
.contact__spiral {
  position: absolute;
  width: 340px;
  max-width: 72vw;
  opacity: 0.4;
  pointer-events: none;
  animation: spin-slow 60s linear infinite;
}
@keyframes spin-slow { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
  .contact__spiral { animation: none; }
}

.contact h2 {
  position: relative;
  font-family: var(--f-display);
  font-weight: 700;
  font-size: clamp(2.2rem, 7vw, 4rem);
  margin: 0;
}
.contact__links {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 56px;
}
.pill {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  text-decoration: none;
  color: var(--ink);
  border: 1px solid var(--ink);
  padding: 10px 20px;
  border-radius: 999px;
  transition: background 0.25s ease, color 0.25s ease;
}
.pill:hover { background: var(--wine); color: var(--bg); border-color: var(--wine); }

.contact__note {
  display: block;
  max-width: 40ch;
  margin: 0 auto;
  font-family: var(--f-body);
  font-style: italic;
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* ===== Footer ===== */
.footer {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
  padding: 30px var(--edge) 40px;
  max-width: 1040px;
  margin: 0 auto;
}