/* ============================================================
   plotgrapher.com — v2
   frutiger-aero · hexagonal-honeycomb · triadic · calm-serene
   ============================================================ */

:root{
  --tri-blue: #2858C0;
  --tri-red:  #C82858;
  --tri-grn:  #28C858;
  --chart-dark: #181828;
  --aero-white: #F0F4F8;
  --marble-cream: #E8E0D0;
  --glass-frost: #E0E8F0;

  --hex-clip: polygon(25% 0%, 75% 0%, 100% 50%, 75% 100%, 25% 100%, 0% 50%);
  --bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

*{ box-sizing: border-box; margin: 0; padding: 0; }

html{ scroll-behavior: smooth; }

body{
  font-family: "Sora", system-ui, sans-serif;
  font-weight: 400;
  background: var(--aero-white);
  color: var(--chart-dark);
  line-height: 1.75;
  font-size: clamp(14px, 0.9vw, 16px);
  overflow-x: hidden;
}

/* ============================================================
   OBSERVATORY
   ============================================================ */
.observatory{
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  isolation: isolate;
}

.triadic-bg{
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 18% 28%, var(--tri-blue) 0%, transparent 55%),
    radial-gradient(circle at 82% 22%, var(--tri-red) 0%, transparent 55%),
    radial-gradient(circle at 50% 88%, var(--tri-grn) 0%, transparent 60%),
    linear-gradient(135deg, var(--tri-blue) 0%, var(--tri-red) 50%, var(--tri-grn) 100%);
  z-index: -2;
}

.grid-overlay{
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(240, 244, 248, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(240, 244, 248, 0.08) 1px, transparent 1px);
  background-size: 48px 48px;
  z-index: -1;
}

.observatory-content{
  position: relative;
  text-align: center;
  padding: 60px 32px;
  max-width: 920px;
  z-index: 2;
}

.eyebrow{
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 36px;
  opacity: 0;
  animation: fadeIn 600ms ease 200ms forwards;
}
.eyebrow-mark{
  display: inline-block;
  width: 28px;
  height: 1px;
  background: var(--marble-cream);
}
.eyebrow-text{
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--marble-cream);
}

.domain-title{
  font-weight: 800;
  font-size: clamp(48px, 8vw, 112px);
  letter-spacing: -0.02em;
  line-height: 0.95;
  color: var(--aero-white);
  text-shadow: 0 4px 20px rgba(24,24,40,0.25);
  opacity: 0;
  animation: fadeIn 600ms ease 100ms forwards;
}
.domain-title .dot{
  color: var(--tri-grn);
  display: inline-block;
  text-shadow: 0 0 24px rgba(40,200,88,0.7);
}

.domain-tagline{
  margin: 28px auto 44px;
  max-width: 560px;
  font-size: clamp(15px, 1.1vw, 18px);
  color: var(--aero-white);
  opacity: 0;
  animation: fadeIn 600ms ease 400ms forwards;
}

.instrument-readout{
  display: inline-grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  padding: 1px;
  background: rgba(255,255,255,0.18);
  border: 1px solid rgba(255,255,255,0.4);
  border-radius: 14px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.5),
              0 8px 28px rgba(24,24,40,0.18);
  opacity: 0;
  animation: fadeIn 600ms ease 600ms forwards;
}
.readout-cell{
  background: linear-gradient(180deg, rgba(240,244,248,0.7), rgba(240,244,248,0.45));
  padding: 14px 22px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 110px;
}
.readout-cell:first-child{ border-radius: 13px 0 0 13px; }
.readout-cell:last-child{ border-radius: 0 13px 13px 0; }
.readout-label{
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--chart-dark);
  opacity: 0.55;
}
.readout-value{
  font-weight: 700;
  font-size: clamp(20px, 2vw, 28px);
  color: var(--chart-dark);
  font-variant-numeric: tabular-nums;
}

/* ---- Marble ornaments ---- */
.marble-ornament{
  position: absolute;
  width: 280px;
  height: auto;
  opacity: 0.85;
  z-index: 1;
}
.marble-top-left{ top: 28px; left: 28px; }
.marble-top-right{ top: 28px; right: 28px; }
.marble-stroke{
  fill: var(--marble-cream);
  stroke: var(--marble-cream);
  stroke-width: 1.5;
  stroke-dasharray: 800;
  stroke-dashoffset: 800;
  animation: draw 1800ms ease 200ms forwards;
}
.marble-stroke rect{ fill: var(--marble-cream); opacity: 0.85; }

/* ---- Growth spirals ---- */
.growth-spiral{
  position: absolute;
  width: 440px;
  height: 440px;
  opacity: 0.55;
  z-index: 0;
}
.spiral-left{ bottom: -80px; left: -80px; }
.spiral-right{ bottom: -80px; right: -80px; transform: scaleX(-1); }

.spiral-stroke path,
.spiral-stroke line,
.branch-stroke path{
  fill: none;
  stroke: var(--aero-white);
  stroke-width: 1.4;
  stroke-linecap: round;
  stroke-dasharray: 1200;
  stroke-dashoffset: 1200;
  animation: draw 2400ms ease 600ms forwards;
}
.spiral-stroke circle,
.branch-stroke circle{
  fill: var(--marble-cream);
  opacity: 0.9;
}

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

/* ============================================================
   SECTION FRAME (Hex grids)
   ============================================================ */
.section{
  position: relative;
  padding: 120px 32px;
  background: var(--aero-white);
}
.section-frame{
  max-width: 1240px;
  margin: 0 auto;
}

.section-header{
  text-align: center;
  margin-bottom: 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
.section-num{
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 0.24em;
  color: var(--tri-blue);
  background: var(--marble-cream);
  padding: 6px 14px;
  border-radius: 4px;
}
.section-title{
  font-weight: 800;
  font-size: clamp(28px, 3.5vw, 56px);
  letter-spacing: -0.01em;
  color: var(--chart-dark);
}
.section-blurb{
  max-width: 540px;
  color: var(--chart-dark);
  opacity: 0.75;
}

/* ============================================================
   HEX GRID (honeycomb tessellation)
   ============================================================ */
.hex-grid{
  --hex-w: 240px;
  --hex-h: 276px; /* h ≈ w * 1.1547 */
  display: grid;
  grid-template-columns: repeat(auto-fit, var(--hex-w));
  gap: 4px 4px;
  justify-content: center;
  padding: 30px 0;
}

.hex{
  width: var(--hex-w);
  height: var(--hex-h);
  position: relative;
  transition: transform 320ms var(--bounce);
  opacity: 0;
  transform: scale(0.8);
}
.hex.is-visible{
  opacity: 1;
  transform: scale(1);
  animation: hexBounce 400ms var(--bounce) backwards;
}

.hex:nth-child(odd){
  margin-top: 0;
}
.hex:nth-child(even){
  margin-top: calc(var(--hex-h) / 2);
}
/* tessellation: pull rows together vertically */
.hex-grid > .hex{
  margin-bottom: calc(var(--hex-h) / -4);
}

.hex-inner{
  position: absolute;
  inset: 0;
  clip-path: var(--hex-clip);
  -webkit-clip-path: var(--hex-clip);
  background: linear-gradient(180deg,
    rgba(240, 244, 248, 0.85) 0%,
    rgba(224, 232, 240, 0.78) 100%);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  padding: 38px 24px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 10px;
  transition: transform 320ms ease, filter 320ms ease;
}
.hex-inner::before{
  content: "";
  position: absolute;
  inset: 0;
  clip-path: var(--hex-clip);
  -webkit-clip-path: var(--hex-clip);
  background: linear-gradient(180deg, rgba(255,255,255,0.55) 0%, rgba(255,255,255,0) 45%);
  pointer-events: none;
}

.hex-label{
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--chart-dark);
  opacity: 0.6;
}
.hex-title{
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.01em;
  color: var(--chart-dark);
}
.hex-text{
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--chart-dark);
  opacity: 0.78;
  max-width: 180px;
}
.hex-cite{
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--chart-dark);
  opacity: 0.55;
  margin-top: 4px;
}

/* triadic ring (subtle) */
.hex[data-tri="b"] .hex-inner{ box-shadow: inset 0 0 0 2px rgba(40,88,192,0.18); }
.hex[data-tri="r"] .hex-inner{ box-shadow: inset 0 0 0 2px rgba(200,40,88,0.18); }
.hex[data-tri="g"] .hex-inner{ box-shadow: inset 0 0 0 2px rgba(40,200,88,0.18); }

/* hover */
.hex:hover .hex-inner{
  filter: brightness(1.05);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.hex[data-tri="b"]:hover .hex-inner{
  box-shadow: inset 0 0 0 2px rgba(40,88,192,0.5),
              0 8px 30px rgba(40,88,192,0.35);
}
.hex[data-tri="r"]:hover .hex-inner{
  box-shadow: inset 0 0 0 2px rgba(200,40,88,0.5),
              0 8px 30px rgba(200,40,88,0.35);
}
.hex[data-tri="g"]:hover .hex-inner{
  box-shadow: inset 0 0 0 2px rgba(40,200,88,0.5),
              0 8px 30px rgba(40,200,88,0.35);
}

/* hex mini visuals */
.hex-mini{
  position: relative;
  width: 130px;
  height: 36px;
  margin-top: 6px;
}
.scatter-mini .dot{
  position: absolute;
  width: 6px; height: 6px;
  border-radius: 50%;
}
.scatter-mini .d1{ background: var(--tri-blue); left: 8%;  top: 20%; }
.scatter-mini .d2{ background: var(--tri-blue); left: 26%; top: 70%; }
.scatter-mini .d3{ background: var(--tri-red);  left: 40%; top: 35%; }
.scatter-mini .d4{ background: var(--tri-red);  left: 58%; top: 55%; }
.scatter-mini .d5{ background: var(--tri-grn);  left: 76%; top: 25%; }
.scatter-mini .d6{ background: var(--tri-grn);  left: 92%; top: 60%; }

.arc-mini{
  background:
    linear-gradient(90deg,
      transparent 0 8%,
      var(--tri-red) 8% 9%,
      transparent 9% 100%),
    radial-gradient(ellipse 65% 30px at 50% 100%, transparent 60%, var(--tri-red) 60% 62%, transparent 62%);
}

.geo-mini{
  background:
    repeating-radial-gradient(circle at 50% 100%,
      var(--tri-grn) 0 1px, transparent 1px 9px);
  border-bottom: 1px solid rgba(40,200,88,0.4);
}

.line-mini{
  background:
    linear-gradient(180deg, transparent 35%, var(--tri-blue) 35% 36%, transparent 36% 60%, var(--tri-blue) 60% 61%, transparent 61% 100%),
    repeating-linear-gradient(90deg, transparent 0 12px, rgba(24,24,40,0.08) 12px 13px);
}

.force-mini{
  background:
    radial-gradient(circle 4px at 22% 50%, var(--tri-red) 100%, transparent 0),
    radial-gradient(circle 4px at 50% 25%, var(--tri-red) 100%, transparent 0),
    radial-gradient(circle 4px at 80% 70%, var(--tri-red) 100%, transparent 0),
    radial-gradient(circle 4px at 60% 80%, var(--tri-red) 100%, transparent 0),
    linear-gradient(45deg, transparent 49%, rgba(200,40,88,0.4) 49% 51%, transparent 51%);
}

.density-mini{
  background:
    radial-gradient(circle at 25% 50%, var(--tri-grn) 5px, transparent 5px),
    radial-gradient(circle at 50% 30%, var(--tri-grn) 7px, transparent 7px),
    radial-gradient(circle at 50% 70%, var(--tri-grn) 9px, transparent 9px),
    radial-gradient(circle at 75% 50%, var(--tri-grn) 6px, transparent 6px);
  opacity: 0.85;
}

.polar-mini{
  background:
    repeating-conic-gradient(from 0deg at 50% 50%, var(--tri-blue) 0deg 6deg, transparent 6deg 30deg);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  margin: 0 auto;
}

/* hex readouts (cells in section 2) */
.hex-readout{
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 4px;
}
.readout-tick{
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: rgba(24,24,40,0.06);
  color: var(--chart-dark);
  padding: 3px 8px;
  border-radius: 3px;
  font-variant-numeric: tabular-nums;
}
.readout-swatch{
  width: 16px; height: 16px;
  border-radius: 3px;
  display: inline-block;
}
.readout-swatch.s-b{ background: var(--tri-blue); }
.readout-swatch.s-r{ background: var(--tri-red); }
.readout-swatch.s-g{ background: var(--tri-grn); }

/* tall hex (Field Notes) */
.hex-tall .hex-inner{
  padding: 44px 26px 38px;
}
.hex-tall .hex-text{
  font-size: 13px;
  font-style: italic;
  line-height: 1.6;
  max-width: 200px;
}

@keyframes hexBounce{
  0%   { opacity: 0; transform: scale(0.8); }
  60%  { opacity: 1; transform: scale(1.04); }
  100% { opacity: 1; transform: scale(1); }
}

/* ============================================================
   INTERSTITIAL — nature × data
   ============================================================ */
.interstitial{
  position: relative;
  padding: 120px 32px;
  background: linear-gradient(180deg, var(--aero-white) 0%, var(--glass-frost) 100%);
  overflow: hidden;
}
.interstitial-alt{
  background: linear-gradient(180deg, var(--glass-frost) 0%, var(--aero-white) 100%);
}

.interstitial-inner{
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.interstitial-inner.reverse{
  direction: rtl;
}
.interstitial-inner.reverse > *{
  direction: ltr;
}

.interstitial-text{
  max-width: 480px;
}
.interstitial-eyebrow{
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--tri-blue);
  display: block;
  margin-bottom: 18px;
}
.interstitial-title{
  font-weight: 800;
  font-size: clamp(32px, 4vw, 56px);
  letter-spacing: -0.015em;
  line-height: 1.05;
  color: var(--chart-dark);
  margin-bottom: 24px;
}
.interstitial-title em{
  font-style: italic;
  font-weight: 700;
  color: var(--tri-grn);
}
.interstitial-blurb{
  color: var(--chart-dark);
  opacity: 0.78;
  margin-bottom: 28px;
}
.ratio-row{
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
}
.ratio{
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: clamp(15px, 1.4vw, 20px);
  color: var(--tri-blue);
}
.ratio-sep{
  color: var(--chart-dark);
  opacity: 0.4;
}

/* phyllotaxis svg */
.phyllotaxis{
  width: 100%;
  max-width: 600px;
  height: auto;
  margin: 0 auto;
  display: block;
}
.phyllo-stroke circle{
  stroke: var(--tri-blue);
  stroke-width: 1;
  stroke-dasharray: 4 6;
  opacity: 0.4;
}
.phyllo-grid line{
  stroke: var(--chart-dark);
  stroke-width: 0.5;
  opacity: 0.15;
}
.phyllo-points circle{
  fill: var(--tri-grn);
  opacity: 0;
  transform-origin: center;
  transition: opacity 200ms ease;
}
.phyllo-points circle.lit{ opacity: 1; }

/* fibonacci spiral block */
.fib-spiral{
  width: 100%;
  max-width: 600px;
  height: auto;
  margin: 0 auto;
  display: block;
}
.fib-stroke rect,
.fib-stroke path{
  stroke: var(--tri-red);
  stroke-width: 1.4;
  fill: none;
  opacity: 0.7;
}
.fib-stroke rect:nth-child(1){ stroke: var(--tri-blue); }
.fib-stroke rect:nth-child(3){ stroke: var(--tri-grn); }
.fib-stroke rect:nth-child(5){ stroke: var(--tri-red); }
.fib-points circle{ fill: var(--chart-dark); opacity: 0.7; }

.growth-list{
  list-style: none;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 20px;
}
.growth-list li{
  background: rgba(40,88,192,0.08);
  border: 1px solid rgba(40,88,192,0.2);
  border-radius: 6px;
  padding: 8px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 60px;
}
.g-num{
  font-weight: 800;
  font-size: 18px;
  color: var(--tri-blue);
  font-variant-numeric: tabular-nums;
}
.g-name{
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--chart-dark);
  opacity: 0.65;
}

/* ============================================================
   CARTOGRAPHER'S TABLE (footer)
   ============================================================ */
.cart-table{
  position: relative;
  padding: 100px 32px 60px;
  background:
    radial-gradient(circle at 10% 20%, rgba(40,88,192,0.06) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(40,200,88,0.06) 0%, transparent 40%),
    var(--marble-cream);
  overflow: hidden;
}
.marble-frame{
  position: absolute;
  inset: 24px 24px auto 24px;
  width: calc(100% - 48px);
  height: calc(100% - 48px);
  pointer-events: none;
}
.marble-frame-stroke{
  fill: none;
  stroke: var(--chart-dark);
  stroke-width: 1.2;
  opacity: 0.35;
}

.cart-content{
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
  padding: 60px 24px;
}

.cart-header{
  text-align: center;
  margin-bottom: 60px;
}
.cart-eyebrow{
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--tri-blue);
  font-weight: 700;
  display: block;
  margin-bottom: 12px;
}
.cart-title{
  font-weight: 800;
  font-size: clamp(28px, 3.5vw, 48px);
  letter-spacing: -0.01em;
  color: var(--chart-dark);
}
.cart-sub{
  margin-top: 10px;
  color: var(--chart-dark);
  opacity: 0.65;
}

.cart-hexes{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 60px;
}
.cart-hex{
  background: linear-gradient(180deg, rgba(240,244,248,0.7), rgba(224,232,240,0.6));
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  padding: 26px 22px;
  clip-path: polygon(8% 0%, 92% 0%, 100% 50%, 92% 100%, 8% 100%, 0% 50%);
  -webkit-clip-path: polygon(8% 0%, 92% 0%, 100% 50%, 92% 100%, 8% 100%, 0% 50%);
  min-height: 180px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.cart-hex[data-tri="b"]{ border-top: 3px solid var(--tri-blue); }
.cart-hex[data-tri="r"]{ border-top: 3px solid var(--tri-red); }
.cart-hex[data-tri="g"]{ border-top: 3px solid var(--tri-grn); }

.cart-hex-label{
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--chart-dark);
  opacity: 0.55;
}
.cart-list{
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.cart-list li{
  font-size: 13px;
  color: var(--chart-dark);
  opacity: 0.85;
}

.cart-footnote{
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 14px;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--chart-dark);
  opacity: 0.55;
  border-top: 1px solid rgba(24,24,40,0.15);
  padding-top: 24px;
  flex-wrap: wrap;
}
.cart-foot-mark{
  color: var(--tri-grn);
  font-size: 14px;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 920px){
  .interstitial-inner{
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .interstitial-inner.reverse{
    direction: ltr;
  }
  .marble-ornament{ width: 180px; }
  .growth-spiral{ width: 280px; height: 280px; }
}

@media (max-width: 680px){
  .hex-grid{
    --hex-w: 200px;
    --hex-h: 230px;
  }
  .instrument-readout{
    grid-template-columns: repeat(2, 1fr);
  }
  .instrument-readout .readout-cell:nth-child(1){ border-radius: 13px 0 0 0; }
  .instrument-readout .readout-cell:nth-child(2){ border-radius: 0 13px 0 0; }
  .instrument-readout .readout-cell:nth-child(3){ border-radius: 0 0 0 13px; }
  .instrument-readout .readout-cell:nth-child(4){ border-radius: 0 0 13px 0; }
  .marble-ornament{ width: 130px; }
  .section{ padding: 80px 20px; }
  .interstitial{ padding: 80px 20px; }
}

@media (max-width: 480px){
  .hex-grid{
    --hex-w: 100%;
    --hex-h: 240px;
  }
  .hex:nth-child(even){ margin-top: 0; }
  .hex-grid > .hex{ margin-bottom: 8px; }
  .hex-inner{
    clip-path: none;
    -webkit-clip-path: none;
    border-radius: 18px;
  }
  .hex-inner::before{ display: none; }
}