/* styles.css */

/* =============== */
/* Base + tokens   */
/* =============== */

:root{
  --paper: #fbfaf7;
  --paper-2: #f7f4ef;
  --ink: #1f2937;

  --line: rgba(31, 41, 55, 0.16);
  --line-2: rgba(31, 41, 55, 0.10);

  --wash-1: rgba(61, 141, 140, 0.08);  /* dusty teal */
  --wash-2: rgba(236, 110, 96, 0.07);  /* coral */
  --wash-3: rgba(231, 179, 73, 0.08);  /* mustard */
  --wash-4: rgba(118, 127, 207, 0.07); /* periwinkle */

  --radius: 18px;

  --shadow: 0 10px 26px rgba(31, 41, 55, 0.08);
  --shadow-soft: 0 6px 16px rgba(31, 41, 55, 0.07);

  --max: 980px;

  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

*,
*::before,
*::after { box-sizing: border-box; }

html, body { height: 100%; }

body{
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1000px 540px at 10% 0%, rgba(118,127,207,0.10), transparent 60%),
    radial-gradient(900px 520px at 92% 8%, rgba(236,110,96,0.10), transparent 55%),
    radial-gradient(900px 520px at 50% 100%, rgba(61,141,140,0.10), transparent 55%),
    linear-gradient(180deg, var(--paper), var(--paper-2));
  line-height: 1.5;
}

img, svg{
  max-width: 100%;
  height: auto;
  display: block;
}

a{ color: inherit; }

/* ================== */
/* Accessibility       */
/* ================== */

.skip-link{
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 10px 12px;
  border-radius: 12px;
  box-shadow: var(--shadow-soft);
}
.skip-link:focus{
  left: 12px;
  top: 12px;
  outline: none;
}

/* ================== */
/* Page layout         */
/* ================== */

.infographic{
  width: min(var(--max), 100%);
  margin: 0 auto;
  padding: 22px 14px 42px;
}

@media (min-width: 740px){
  .infographic{ padding: 28px 18px 56px; }
}

/* ================== */
/* Panels              */
/* ================== */

.panel{
  position: relative;
  margin: 18px 0;
  padding: 18px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.55), rgba(255,255,255,0.25)),
    radial-gradient(900px 220px at 12% 0%, var(--wash-1), transparent 60%),
    radial-gradient(900px 240px at 92% 10%, var(--wash-2), transparent 55%);
  box-shadow: var(--shadow-soft);
}

.panel:nth-of-type(3n+1){
  background:
    linear-gradient(180deg, rgba(255,255,255,0.55), rgba(255,255,255,0.25)),
    radial-gradient(900px 220px at 12% 0%, var(--wash-3), transparent 60%),
    radial-gradient(900px 240px at 92% 10%, var(--wash-1), transparent 55%);
}
.panel:nth-of-type(3n+2){
  background:
    linear-gradient(180deg, rgba(255,255,255,0.55), rgba(255,255,255,0.25)),
    radial-gradient(900px 220px at 12% 0%, var(--wash-4), transparent 60%),
    radial-gradient(900px 240px at 92% 10%, var(--wash-3), transparent 55%);
}

@media (min-width: 740px){
  .panel{
    margin: 20px 0;
    padding: 22px 22px;
    box-shadow: var(--shadow);
  }
}

.panel__header{
  display: grid;
  gap: 8px;
  padding-bottom: 12px;
}

.panel__body{ padding-top: 6px; }

.panel__grid{
  display: grid;
  gap: 14px;
}

@media (min-width: 860px){
  .panel__grid{
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
    gap: 18px;
  }
  .panel__grid > .panel__visual{ order: 2; }
}

.panel--title .panel__grid{
  align-items: center;
}
@media (min-width: 860px){
  .panel--title .panel__grid{ grid-template-columns: 1.05fr 0.95fr; }
}

.panel--closing{
  background:
    linear-gradient(180deg, rgba(255,255,255,0.60), rgba(255,255,255,0.28)),
    radial-gradient(1100px 300px at 18% 0%, rgba(61,141,140,0.12), transparent 62%),
    radial-gradient(900px 260px at 92% 10%, rgba(118,127,207,0.10), transparent 58%);
}

.panel__footer{
  border-top: 1px dashed var(--line);
  margin-top: 14px;
  padding-top: 12px;
}

/* ================== */
/* Typography          */
/* ================== */

h1, h2, h3{
  margin: 0;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

h2{
  font-size: 1.25rem;
}
@media (min-width: 740px){
  h2{ font-size: 1.35rem; }
}

.title{
  font-size: 2.0rem;
  letter-spacing: -0.02em;
}
@media (min-width: 740px){
  .title{ font-size: 2.55rem; }
}

.kicker{
  margin: 0;
  font-size: 0.92rem;
  opacity: 0.82;
}

.lede{
  margin: 0;
  font-size: 1.05rem;
  opacity: 0.92;
}

.quote{
  display: inline-block;
  padding: 0 6px;
  border-radius: 10px;
  background: rgba(31, 41, 55, 0.06);
  border: 1px solid var(--line-2);
}

.caption{
  margin: 0 0 10px;
  font-size: 0.98rem;
  opacity: 0.9;
}

.statement{
  margin: 0 0 10px;
  font-size: 1.02rem;
}

.micro{
  margin: 12px 0 0;
  font-size: 0.95rem;
  opacity: 0.88;
}

.note{
  margin: 12px 0 0;
  font-size: 0.95rem;
  opacity: 0.85;
}

.side-caption{
  margin: 12px 0 0;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px dashed var(--line);
  background: rgba(255,255,255,0.55);
  font-size: 0.96rem;
  opacity: 0.92;
}

.small-caption{
  margin: 12px 0 0;
  font-size: 0.95rem;
  opacity: 0.88;
}

.footnote{
  margin: 10px 0 0;
  font-size: 0.92rem;
  opacity: 0.8;
}

.dry{
  margin: 12px 0 0;
  font-size: 0.95rem;
  opacity: 0.85;
}

.quiet{
  margin: 10px 0 0;
  font-size: 0.95rem;
  opacity: 0.85;
}

.final-caption{
  margin: 0;
  font-size: 0.95rem;
  opacity: 0.86;
}

/* ================== */
/* Lists               */
/* ================== */

.bullets{
  margin: 10px 0 0;
  padding-left: 18px;
}
.bullets li{
  margin: 6px 0;
}

.steps{
  margin: 0;
  padding-left: 18px;
}
.steps li{
  margin: 10px 0;
  padding-left: 4px;
}

/* ================== */
/* Blocks              */
/* ================== */

.definition{
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 12px 12px;
  background: rgba(255,255,255,0.62);
}
.definition p{
  margin: 0 0 8px;
}
.definition .bullets{
  margin: 0;
}

.equation{
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  align-items: center;
  padding: 12px 12px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255,255,255,0.62);
}
.eq__part{
  padding: 6px 10px;
  border-radius: 14px;
  border: 1px solid var(--line-2);
  background: rgba(31, 41, 55, 0.05);
}
.eq__op{
  opacity: 0.75;
  font-weight: 600;
}
.eq__result{
  padding: 6px 10px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(61, 141, 140, 0.10);
  font-weight: 700;
}

/* ================== */
/* Visuals             */
/* ================== */

.panel__visual{
  display: grid;
  gap: 12px;
}

.panel__visual img{
  width: 100%;
  border-radius: 16px;
  border: 1px solid var(--line);
  box-shadow: 0 10px 22px rgba(31,41,55,0.10);
  background: rgba(255,255,255,0.55);
}

.art{
  width: 100%;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.55);
  box-shadow: 0 10px 22px rgba(31,41,55,0.10);
  color: var(--ink);
}

.art--brain,
.art--graph,
.art--surfaces,
.art--flow,
.art--closing{
  padding: 10px;
}

.stack-visual{
  display: grid;
  gap: 12px;
}

/* ================== */
/* Meter               */
/* ================== */

.meter{
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 10px 10px 8px;
  background: rgba(255,255,255,0.62);
}

.meter__header{
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: baseline;
  margin-bottom: 8px;
}

.meter__label{
  font-size: 0.95rem;
  opacity: 0.9;
  font-weight: 600;
}

.meter__value{
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.meter__svg{
  width: 100%;
  height: auto;
}

/* ================== */
/* Closing lines       */
/* ================== */

.closing-line{
  margin: 0 0 10px;
  font-size: 1.05rem;
}
.panel--closing .closing-line{
  font-size: 1.08rem;
}

/* ================== */
/* Print               */
/* ================== */

@media print{
  body{
    background: white;
  }
  .infographic{
    width: 100%;
    padding: 0;
  }
  .panel{
    break-inside: avoid;
    box-shadow: none;
    background: white;
  }
  .panel__visual img,
  .art{
    box-shadow: none;
  }
  .skip-link{ display: none; }
}