/* styles.css */

/* --- Base + tokens (calm editorial palette) --- */
:root{
  --paper: #fbfaf7;
  --paper-2: #f7f4ef;
  --ink: #1f2937;

  --line: rgba(31,41,55,.18);
  --line-2: rgba(31,41,55,.26);

  --shadow: 0 10px 26px rgba(31,41,55,.08);
  --shadow-tight: 0 6px 18px rgba(31,41,55,.08);

  /* accents (restrained) */
  --blue: #3b82f6;
  --red: #b45354;
  --mustard: #f2b84b;
  --teal: #2ea6a6;

  --radius: 22px;
  --radius-sm: 16px;

  --max: 980px;
  --gutter: 18px;

  --step-0: clamp(0.98rem, 0.9rem + 0.25vw, 1.08rem);
  --step-1: clamp(1.15rem, 1.05rem + 0.5vw, 1.35rem);
  --step-2: clamp(1.45rem, 1.25rem + 1vw, 1.95rem);
  --step-3: clamp(1.9rem, 1.55rem + 1.6vw, 2.65rem);

  --lh: 1.55;
}

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

html { color-scheme: light; }

body{
  margin: 0;
  background:
    radial-gradient(900px 420px at 10% -10%, rgba(242,184,75,.20), transparent 55%),
    radial-gradient(900px 500px at 110% 0%, rgba(59,130,246,.12), transparent 60%),
    linear-gradient(180deg, var(--paper), var(--paper-2));
  color: var(--ink);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  line-height: var(--lh);
  letter-spacing: .01em;
}

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

a{ color: inherit; }
ul{ margin: 0.35rem 0 0.8rem; padding-left: 1.1rem; }
li{ margin: 0.22rem 0; }

p{ margin: 0.35rem 0 0.9rem; }

/* --- Accessibility --- */
.skip-link{
  position: absolute;
  left: 10px;
  top: 10px;
  padding: 10px 12px;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-tight);
  transform: translateY(-140%);
  transition: transform .18s ease;
  z-index: 50;
}
.skip-link:focus{ transform: translateY(0); outline: none; }

/* --- Header --- */
.page-header{
  padding: 28px var(--gutter) 8px;
}

.header-inner{
  max-width: var(--max);
  margin: 0 auto;
}

.kicker{
  margin: 0 0 10px;
  font-size: .95rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  opacity: .78;
}

h1{
  margin: 0 0 10px;
  font-size: var(--step-3);
  line-height: 1.08;
  letter-spacing: .005em;
}

.dek{
  font-size: var(--step-1);
  max-width: 72ch;
  margin: 0 0 18px;
  opacity: .92;
}

/* --- Hero image --- */
.hero{
  margin: 16px 0 14px;
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(255,255,255,.55);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.hero img{
  width: 100%;
  height: auto;
  object-fit: contain;
  object-position: center;
  background: var(--paper-2);
}

.hero figcaption{
  padding: 10px 14px 12px;
  font-size: .96rem;
  opacity: .86;
}

/* --- Cover diagram wrapper --- */
.cover-diagram{
  margin: 14px 0 0;
}

/* --- Main page --- */
.page{
  padding: 10px var(--gutter) 44px;
}

.panel{
  max-width: var(--max);
  margin: 18px auto;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(255,255,255,.58), rgba(255,255,255,.40));
  box-shadow: var(--shadow-tight);
  overflow: clip;
}

.panel-inner{
  padding: 18px 16px 16px;
}

/* panel headings */
.panel h2{
  margin: 0 0 12px;
  font-size: var(--step-2);
  letter-spacing: .01em;
}

.panel h3{
  margin: 12px 0 6px;
  font-size: 1.02rem;
  letter-spacing: .02em;
}

.metric{
  margin: 0.25rem 0 0.85rem;
}

/* --- Two-column within modules (keeps vertical order) --- */
.two-col{
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  align-items: start;
}

.copy{
  min-width: 0;
}

.visual{
  min-width: 0;
}

.visual svg{
  width: 100%;
  border-radius: var(--radius-sm);
}

/* --- Takeaway --- */
.takeaway{
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px dashed rgba(31,41,55,.22);
  background: rgba(255,255,255,.5);
}
.takeaway strong{ font-weight: 750; }

/* --- Inline illustration (second image) --- */
.inline-illustration{
  margin: 14px 0 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.55);
}
.inline-illustration img{
  width: 100%;
  height: auto;
  object-fit: contain;
  background: var(--paper-2);
}

.inline-illustration figcaption{
  padding: 10px 14px 12px;
  font-size: .96rem;
  opacity: .86;
}

/* --- Closing/footer twist + share prompt --- */
.footer-twist{
  margin-top: 10px;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(180,83,84,.08);
  border: 1px solid rgba(180,83,84,.22);
}
.share-prompt{
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 16px;
  background: rgba(59,130,246,.09);
  border: 1px solid rgba(59,130,246,.22);
}
.share-prompt p{ margin: 0; }

/* --- Stage theming (subtle washes) --- */
.stage-1{
  background:
    radial-gradient(900px 260px at 10% 0%, rgba(242,184,75,.18), transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,.60), rgba(255,255,255,.40));
}
.stage-2{
  background:
    radial-gradient(900px 260px at 100% 0%, rgba(46,166,166,.12), transparent 62%),
    linear-gradient(180deg, rgba(255,255,255,.60), rgba(255,255,255,.40));
}
.stage-3{
  background:
    radial-gradient(900px 260px at 0% 0%, rgba(107,114,128,.14), transparent 62%),
    linear-gradient(180deg, rgba(255,255,255,.60), rgba(255,255,255,.40));
}
.stage-4{
  background:
    radial-gradient(900px 260px at 100% 0%, rgba(107,114,128,.14), transparent 60%),
    linear-gradient(180deg, rgba(255,255,255,.60), rgba(255,255,255,.40));
}
.stage-5{
  background:
    radial-gradient(900px 260px at 10% 0%, rgba(180,83,84,.12), transparent 62%),
    linear-gradient(180deg, rgba(255,255,255,.60), rgba(255,255,255,.40));
}
.stage-6{
  background:
    radial-gradient(900px 260px at 100% 0%, rgba(59,130,246,.12), transparent 62%),
    linear-gradient(180deg, rgba(255,255,255,.60), rgba(255,255,255,.40));
}
.stage-7{
  background:
    radial-gradient(900px 260px at 0% 0%, rgba(180,83,84,.14), transparent 62%),
    linear-gradient(180deg, rgba(255,255,255,.60), rgba(255,255,255,.40));
}

.framing{
  background:
    radial-gradient(900px 260px at 8% 0%, rgba(59,130,246,.10), transparent 62%),
    radial-gradient(900px 260px at 100% 0%, rgba(242,184,75,.12), transparent 64%),
    linear-gradient(180deg, rgba(255,255,255,.60), rgba(255,255,255,.40));
}

.closing{
  background:
    radial-gradient(900px 260px at 12% 0%, rgba(46,166,166,.12), transparent 62%),
    radial-gradient(900px 260px at 100% 0%, rgba(180,83,84,.10), transparent 62%),
    linear-gradient(180deg, rgba(255,255,255,.60), rgba(255,255,255,.40));
}

/* --- Footer --- */
.page-footer{
  padding: 0 var(--gutter) 34px;
}
.page-footer p{
  max-width: var(--max);
  margin: 0 auto;
  opacity: .78;
  font-size: .98rem;
}

/* --- Desktop enhancements (still vertical flow) --- */
@media (min-width: 900px){
  .page-header{ padding-top: 34px; }
  .panel-inner{ padding: 22px 22px 18px; }

  .two-col{
    grid-template-columns: 1.08fr 0.92fr;
    gap: 18px;
  }

  .hero{ margin-top: 18px; }
  .cover-diagram{ margin-top: 16px; }
}

/* --- Print friendliness --- */
@media print{
  body{
    background: #fff;
  }

  .skip-link{ display: none; }

  .panel,
  .hero,
  .inline-illustration{
    box-shadow: none;
    break-inside: avoid;
  }

  .page{
    padding-bottom: 0;
  }

  .page-footer{
    padding-bottom: 0;
  }

  a{ text-decoration: none; }
}