/* ────────────────────────────────────────────────────────────
   PIT · Dr. Ricardo D. Frusso — Design tokens
   Fuente: Manual de Marca (autoritativo) + landing curso-pit
   Azul unificado a #2563EB (manual).
   ──────────────────────────────────────────────────────────── */
:root {
  /* ── Escala de tinta (ink) ── */
  --pit-ink: #0A0A0A;
  --pit-ink-80: #1A1A1A;
  --pit-ink-60: #404040;
  --pit-ink-40: #737373;
  --pit-ink-20: #BFBFBF;
  --pit-ink-10: #E5E5E5;
  --pit-ink-05: #F4F4F4;

  /* ── Papel ── */
  --pit-paper: #FAFAF7;
  --pit-paper-pure: #FFFFFF;

  /* ── Azul de marca ── */
  --pit-blue: #2563EB;
  --pit-blue-deep: #1E3A8A;
  --pit-blue-tint: #EFF4FE;

  /* ── Tipografía ── */
  --pit-font-sans: 'Space Grotesk', ui-sans-serif, system-ui, -apple-system, 'Helvetica Neue', sans-serif;
  --pit-font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, Consolas, monospace;

  /* ── Radios ── */
  --pit-radius: 4px;
  --pit-radius-pill: 999px;

  /* ── Layout ── */
  --pit-content-max: 1200px;
  --pit-text-max: 66ch;
  --pit-section-padding: clamp(52px, 6vw, 88px) clamp(24px, 6vw, 120px);

  /* ── Movimiento ── */
  --pit-transition-fast: 0.2s ease;
  --pit-transition-smooth: 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ────────────────────────────────────────────────────────────
   PIT · Dr. Ricardo D. Frusso — Component styles
   Derivado 1:1 del Manual de Marca + landing curso-pit.

   ESCALA TIPOGRÁFICA: los tamaños de acá usan los 6 pasos
   (--txt-2xs..--txt-xl) que definen index.html y pit-v2.css.
   Van SIEMPRE con fallback en px porque curso-intro.html carga
   esta hoja pero NO carga pit-v2.css: sin el fallback, ahí los
   tokens no existirían y el texto colapsaría al tamaño del
   navegador. Los display (.pit-display/.pit-title/
   .pit-section-title) quedan en clamp: dependen del viewport,
   no de la escala.
   ──────────────────────────────────────────────────────────── */

/* ── Tipografía ─────────────────────────────────────────────── */
.pit-display {
  font-family: var(--pit-font-sans);
  font-weight: 700;
  font-size: clamp(52px, 8vw, 96px);
  line-height: 1;
  letter-spacing: -0.035em;
  color: var(--pit-ink);
  margin: 0;
}
.pit-title {
  font-family: var(--pit-font-sans);
  font-weight: 700;
  font-size: clamp(40px, 6vw, 72px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--pit-ink);
  margin: 0;
}
.pit-section-title {
  font-family: var(--pit-font-sans);
  font-weight: 600;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.08;
  letter-spacing: -0.025em;
  color: var(--pit-ink);
  margin: 0;
}
.pit-lead {
  font-family: var(--pit-font-sans);
  font-weight: 400;
  font-size: var(--txt-xl, 24px);
  line-height: 1.45;
  color: var(--pit-ink-60);
  max-width: var(--pit-text-max);
  margin: 0;
  text-wrap: pretty;
}
.pit-body-l {
  font-family: var(--pit-font-sans);
  font-weight: 400;
  font-size: var(--txt-md, 17px);
  line-height: 1.55;
  color: var(--pit-ink-80);
  margin: 0;
}
.pit-body {
  font-family: var(--pit-font-sans);
  font-weight: 400;
  font-size: var(--txt-md, 17px);
  line-height: 1.5;
  color: var(--pit-ink-80);
  margin: 0;
}
.pit-eyebrow {
  font-family: var(--pit-font-mono);
  font-weight: 500;
  font-size: var(--txt-2xs, 11px);
  line-height: 1.45;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--pit-blue);
  margin: 0;
}
.pit-eyebrow--ink { color: var(--pit-ink); }
.pit-kicker {
  font-family: var(--pit-font-mono);
  font-weight: 500;
  font-size: var(--txt-2xs, 11px);
  line-height: 1.45;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--pit-ink-40);
  margin: 0;
}

/* ── Pipe (firma de marca) ──────────────────────────────────── */
.pit-pipe {
  display: inline-block;
  width: 3px;
  height: 1em;
  background: currentColor;
  border-radius: 2px;
  vertical-align: -0.12em;
  flex-shrink: 0;
}
.pit-pipe--blue { color: var(--pit-blue); }
.pit-pipe--ink { color: var(--pit-ink); }

/* ── Logo ───────────────────────────────────────────────────── */
.pit-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.pit-logo-dr {
  font-family: var(--pit-font-sans);
  font-weight: 700;
  font-size: var(--txt-xs, 13px);
  letter-spacing: 0.08em;
  line-height: 1;
  color: var(--pit-ink);
  white-space: nowrap;
}
.pit-logo-pipe {
  display: inline-block;
  width: 3px;
  height: 28px;
  background: var(--pit-blue);
  border-radius: 2px;
  flex-shrink: 0;
}
.pit-logo-name {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.pit-logo-name span {
  font-family: var(--pit-font-sans);
  font-weight: 700;
  font-size: var(--txt-xs, 13px);
  letter-spacing: 0.04em;
  line-height: 1.3;
  color: var(--pit-ink);
  white-space: nowrap;
}
.pit-logo--on-dark .pit-logo-dr,
.pit-logo--on-dark .pit-logo-name span { color: var(--pit-paper); }

/* ── Botón ──────────────────────────────────────────────────── */
.pit-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  box-sizing: border-box;
  gap: 8px;
  font-family: var(--pit-font-sans);
  font-weight: 600;
  font-size: var(--txt-sm, 15px);
  line-height: 1;
  padding: 14px 28px;
  border-radius: var(--pit-radius);
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: background-color var(--pit-transition-fast),
              transform var(--pit-transition-fast),
              color var(--pit-transition-fast);
}
.pit-btn--primary { background-color: var(--pit-blue); color: #fff; }
.pit-btn--primary:hover { background-color: var(--pit-blue-deep); transform: translateY(-2px); }
.pit-btn--white { background-color: #fff; color: var(--pit-blue); }
.pit-btn--white:hover { background-color: var(--pit-ink); color: #fff; transform: translateY(-2px); }
.pit-btn--sm { padding: 10px 20px; font-size: var(--txt-xs, 13px); }

/* ── Chip / Pill ────────────────────────────────────────────── */
.pit-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--pit-ink-20);
  border-radius: var(--pit-radius-pill);
  font-family: var(--pit-font-mono);
  font-size: var(--txt-2xs, 11px);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--pit-ink-60);
  background: transparent;
}
.pit-chip--filled { background: var(--pit-ink); color: var(--pit-paper); border-color: var(--pit-ink); }
.pit-chip--blue { background: var(--pit-blue); color: #fff; border-color: var(--pit-blue); }
.pit-chip--ghost { border-style: dashed; }

/* ── Card ───────────────────────────────────────────────────── */
.pit-card {
  border: 1px solid var(--pit-ink-10);
  background: var(--pit-paper-pure);
  border-radius: var(--pit-radius);
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform var(--pit-transition-fast), box-shadow var(--pit-transition-fast);
}
.pit-card--lift:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(10, 10, 10, 0.08);
}

/* ── Ruler (barra guía superior) ────────────────────────────── */
.pit-ruler {
  display: flex;
  width: 100%;
  height: 6px;
  background: var(--pit-ink);
}
.pit-ruler-seg { flex: 1; }
.pit-ruler-seg--blue { background: var(--pit-blue); max-width: 22%; }

/* ── Section ────────────────────────────────────────────────── */
.pit-section {
  padding: var(--pit-section-padding);
  background: var(--pit-paper);
  color: var(--pit-ink);
}
.pit-section-inner {
  max-width: var(--pit-content-max);
  margin: 0 auto;
}
.pit-section--dark { background: var(--pit-ink); color: var(--pit-paper); }
.pit-section--dark .pit-eyebrow { color: #90B4FF; }
.pit-section--dark .pit-lead { color: rgba(255, 255, 255, 0.75); }
.pit-section--dark .pit-section-title,
.pit-section--dark .pit-title,
.pit-section--dark .pit-display { color: var(--pit-paper); }
.pit-section--blue { background: var(--pit-blue); color: #fff; }
.pit-section--blue .pit-eyebrow { color: rgba(255, 255, 255, 0.85); }
.pit-section--blue .pit-lead { color: rgba(255, 255, 255, 0.9); }
.pit-section--blue .pit-section-title,
.pit-section--blue .pit-title,
.pit-section--blue .pit-display { color: #fff; }