/* Programa "Trabajar con Claude" — sistema de diseño compartido.
   Paleta y tipografía alineadas al brand board de Horacio Leanza:
   charcoal / teal de laboratorio / taupe, Archivo para titulares,
   IBM Plex Mono para datos y etiquetas. Ver notas-proyecto.md. */

:root{
  --ink: #21252b;
  --ink-soft: #4d535b;
  --ink-faint: #878d92;
  --teal: #3f6e63;
  --teal-ink: #2f544b;
  --taupe: #a89d92;
  --taupe-soft: #cbc2b7;
  --bg: #eef0ee;
  --bg-raised: #ffffff;
  --line: #dcd6cb;
  --line-soft: #e7e2d8;
  --tag-bg: #ffffff;
  --shadow: 0 1px 2px rgba(33,37,43,0.04), 0 8px 24px rgba(33,37,43,0.06);
  --done-bg: #e4ede9;
  --done-ink: #2f6e5c;
  --done-border: #bfd9cd;
  --next-bg: #fdf3e2;
  --next-ink: #a1752c;
  --next-border: #eedaaf;
  --planned-bg: #f1ede5;
  --planned-ink: #8a8478;
  --planned-border: #ddd5c6;
}
@media (prefers-color-scheme: dark){
  :root{
    --ink: #eef0ee;
    --ink-soft: #c7c2b8;
    --ink-faint: #8b877e;
    --teal: #6ba899;
    --teal-ink: #8fc4b5;
    --taupe: #b7ac9f;
    --taupe-soft: #756c60;
    --bg: #16181b;
    --bg-raised: #1e2126;
    --line: #32363b;
    --line-soft: #292c30;
    --tag-bg: #1e2126;
    --shadow: 0 1px 2px rgba(0,0,0,0.25), 0 8px 24px rgba(0,0,0,0.35);
    --done-bg: #1f2b26;
    --done-ink: #8fc4b5;
    --done-border: #2f453d;
    --next-bg: #2e2717;
    --next-ink: #e0ac5e;
    --next-border: #4a3c22;
    --planned-bg: #201f1c;
    --planned-ink: #8b877e;
    --planned-border: #34312b;
  }
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  line-height: 1.55;
}
h1, h2, h3, .display{
  font-family: "Archivo", -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.mono, .eyebrow, .badge, .pill, .tag, .kicker, code, .mono-label{
  font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

.wrap{
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px 100px;
}

a{ color: var(--teal-ink); }

/* Header / hero -------------------------------------------------- */
header.hero{
  padding: 64px 0 32px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}
.eyebrow{
  font-size: 12.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--teal-ink);
  font-weight: 600;
  margin: 0 0 16px;
}
h1{
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1.1;
  margin: 0 0 18px;
}
h1 .title-rule{
  display: block;
  width: 56px;
  height: 3px;
  background: var(--teal);
  margin: 18px 0 0;
  border: none;
}
.lede{
  font-size: 17.5px;
  color: var(--ink-soft);
  max-width: 62ch;
  margin: 0 0 20px;
}

.status-bar{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 26px;
  padding: 16px 18px;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: var(--shadow);
}
.status-bar .big{ font-weight: 700; font-size: 14.5px; font-family: "IBM Plex Mono", monospace; }
.status-bar .sep{ color: var(--line); }
.status-bar .muted{ color: var(--ink-faint); font-size: 13.5px; }

.prereqs{
  border-left: 3px solid var(--teal);
  padding: 20px 22px;
  margin-bottom: 32px;
}
.prereqs-title{
  font-family: "IBM Plex Mono", monospace;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal-ink);
  margin: 0 0 16px;
  font-weight: 600;
}
.prereqs ul{ list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.prereqs li{ display: flex; gap: 14px; align-items: flex-start; }
.prereqs .check{
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  border: 2px solid var(--teal);
  border-radius: 5px;
}
.prereqs li strong{ display: block; font-size: 15px; color: var(--ink); margin-bottom: 3px; }
.prereqs li span{ font-size: 14px; color: var(--ink-soft); }
.prereqs li a{ color: var(--teal-ink); font-weight: 600; text-decoration: underline; }

section.intro{ margin-bottom: 28px; }
section.intro p{
  font-size: 16px;
  color: var(--ink-soft);
  max-width: 66ch;
}
section.intro strong{ color: var(--ink); }

/* Back link -------------------------------------------------------- */
.back-link{
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: "IBM Plex Mono", monospace;
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  text-decoration: none;
}
.back-link:hover{ color: var(--teal-ink); }

/* Section titles ----------------------------------------------------*/
h2.section-title{
  font-size: 12.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-weight: 700;
  font-family: "IBM Plex Mono", monospace;
  margin: 52px 0 20px;
  display: flex;
  align-items: center;
  gap: 12px;
}
h2.section-title::after{
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line);
}

/* Cards -------------------------------------------------------------*/
.card{
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: var(--shadow);
}

/* Session list cards on the homepage --------------------------------*/
.session-card{
  display: block;
  text-decoration: none;
  color: inherit;
  padding: 22px 24px;
  margin-bottom: 14px;
}
.session-card:hover{ border-color: var(--teal); }
.session-card-head{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.session-card-left{
  display: flex;
  align-items: center;
  gap: 16px;
}
.session-box{
  font-family: "IBM Plex Mono", monospace;
  font-weight: 700;
  font-size: 14px;
  border: 1px solid var(--line);
  color: var(--ink-faint);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  flex-shrink: 0;
}
.session-card h3{
  font-size: 18px;
  margin: 0;
}
.session-goal{
  color: var(--ink-soft);
  font-size: 14.5px;
  margin: 10px 0 0 56px;
}
@media (max-width: 560px){
  .session-goal{ margin-left: 0; }
}

/* Badges --------------------------------------------------------------*/
.badge{
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
  border: 1px solid transparent;
}
.badge-done{ background: var(--done-bg); color: var(--done-ink); border-color: var(--done-border); }
.badge-next{ background: var(--next-bg); color: var(--next-ink); border-color: var(--next-border); }
.badge-planned{ background: var(--planned-bg); color: var(--planned-ink); border-color: var(--planned-border); }

/* Teaser box (links to session 1 instead of repeating content) ------*/
.teaser{
  text-decoration: none;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}
.teaser p{ margin: 0; color: var(--ink-soft); font-size: 14.5px; }
.teaser strong{ color: var(--ink); }
.teaser a.go{
  font-family: "IBM Plex Mono", monospace;
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--teal-ink);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid var(--teal);
  padding: 8px 14px;
  border-radius: 999px;
}
.teaser a.go:hover{ background: var(--teal); color: var(--bg-raised); }

/* Buenas prácticas ------------------------------------------------- */
.rules{ display: grid; gap: 14px; }
.rule{ padding: 18px 20px; }
.rule h4{ margin: 0 0 6px; font-size: 15px; font-family: "Archivo", sans-serif; font-weight: 700; }
.rule p{ margin: 0; color: var(--ink-soft); font-size: 14.5px; }

footer.page-footer{
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--ink-faint);
  font-size: 13px;
  font-family: "IBM Plex Mono", monospace;
}

@media (max-width: 600px){
  header.hero{ padding: 44px 0 28px; }
}