/* ============================================
   Aula de Ilustración Digital — Laura Raykow
   Sistema: cuaderno de estudio / mesa de trabajo
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Bricolage+Grotesque:opsz,wght@12..96,400..800&family=Work+Sans:wght@400;500;600;700&display=swap');

:root{
  --ink:        #2a2420;
  --ink-soft:   #574d43;
  --paper:      #f7f4ee;
  --paper-raised:#fffdfa;
  --sand:       #ede3d3;
  --line:       #ddccb2;
  --orange:     #ca6d2a;
  --orange-dark:#a4551c;
  --teal:       #2d6a63;
  --teal-dark:  #1f4b46;

  --font-display: "Bricolage Grotesque", "Segoe UI", sans-serif;
  --font-body: "Work Sans", "Segoe UI", sans-serif;

  --radius: 10px;
  --shadow-card: 0 2px 0 var(--line), 0 10px 24px -14px rgba(42,36,32,.35);
}

*{ box-sizing: border-box; }

html{ scroll-behavior: smooth; }

body{
  margin:0;
  font-family: var(--font-body);
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    radial-gradient(circle, rgba(202,109,42,.16) 1px, transparent 1.4px);
  background-size: 22px 22px;
  line-height: 1.6;
  font-size: 17px;
}

h1, h2, h3, h4{
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

a{ color: var(--teal); text-decoration: none; }
a:hover{ color: var(--orange); }
a:visited{ color: var(--teal-dark); }

.container{
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- Header / Nav ---------- */
.site-header{
  background: var(--paper-raised);
  border-bottom: 3px solid var(--ink);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header .container{
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--ink);
}
.brand img{ height: 36px; width: 36px; }
.brand small{
  display:block;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: .62rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

nav.main-nav{
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
nav.main-nav a{
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .92rem;
  color: var(--ink);
  padding: 8px 14px;
  border-radius: 999px;
  transition: background .15s ease, color .15s ease;
}
nav.main-nav a:hover{
  background: var(--sand);
  color: var(--orange-dark);
}
nav.main-nav a.active{
  background: var(--orange);
  color: #fff;
}
nav.main-nav a.external::after{
  content: "↗";
  font-size: .7em;
  margin-left: 3px;
  opacity: .6;
}

.nav-toggle{
  display:none;
  background: none;
  border: 2px solid var(--ink);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 1.1rem;
  cursor: pointer;
}

/* ---------- Hero ---------- */
.hero{
  padding: 56px 0 40px;
}
.hero .eyebrow{
  display:inline-block;
  font-weight: 700;
  font-size: .78rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--orange-dark);
  background: var(--sand);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 14px;
}
.hero h1{
  font-size: clamp(2rem, 4vw, 2.9rem);
  max-width: 16ch;
  margin: 0 0 18px;
}
.hero p{
  max-width: 62ch;
  font-size: 1.08rem;
  color: var(--ink-soft);
}
.hero-actions{
  display:flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 22px;
}

/* ---------- Buttons ---------- */
.btn{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .95rem;
  padding: 11px 20px;
  border-radius: 999px;
  border: 2px solid var(--ink);
  cursor: pointer;
  transition: transform .12s ease, box-shadow .12s ease;
}
.btn:hover{ transform: translateY(-2px); }
.btn-primary{
  background: var(--orange);
  color: #fff;
  border-color: var(--orange-dark);
}
.btn-primary:hover{ color:#fff; box-shadow: 0 6px 0 var(--orange-dark); }
.btn-ghost{
  background: transparent;
  color: var(--ink);
}
.btn-ghost:hover{ color: var(--orange-dark); box-shadow: 0 6px 0 var(--ink); }

/* ---------- Section headers ---------- */
.section{ padding: 34px 0; }
.section-head{
  display:flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 26px;
  flex-wrap: wrap;
}
.section-head h2{ font-size: 1.7rem; margin: 0; }
.section-head .step-num{
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 2rem;
  color: var(--sand);
  -webkit-text-stroke: 1.5px var(--orange);
  line-height: 1;
}
.section-lede{
  color: var(--ink-soft);
  max-width: 68ch;
  margin: -14px 0 26px;
}

/* ---------- Timeline (unidades secuenciales) ---------- */
.timeline{
  position: relative;
  padding-left: 34px;
  border-left: 3px dashed var(--line);
}
.timeline-step{
  position: relative;
  margin-bottom: 44px;
}
.timeline-step::before{
  content: attr(data-num);
  position: absolute;
  left: -46px;
  top: 0;
  width: 30px; height: 30px;
  background: var(--orange);
  color: #fff;
  border-radius: 50%;
  display:flex; align-items:center; justify-content:center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .85rem;
  border: 3px solid var(--paper);
  box-shadow: 0 0 0 2px var(--ink);
}

/* ---------- Cards ---------- */
.card-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}
.card{
  position: relative;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
/* cinta de papel decorativa */
.card::after{
  content: "";
  position: absolute;
  top: -6px; right: 22px;
  width: 46px; height: 18px;
  background: rgba(202,109,42,.55);
  transform: rotate(4deg);
  border: 1px solid rgba(0,0,0,.05);
}
.card img{
  width: 100%;
  height: 170px;
  object-fit: cover;
  border-bottom: 1px solid var(--line);
  background: var(--sand);
}
.card-body{ padding: 18px 20px 6px; }
.card-body h3{ font-size: 1.12rem; margin: 0 0 6px; }
.card-body .tag{
  display:inline-block;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .05em;
  text-transform: uppercase;
  color: var(--teal-dark);
  background: #e3ede9;
  padding: 3px 9px;
  border-radius: 999px;
  margin-bottom: 8px;
}
.card-body ul{
  margin: 8px 0 4px;
  padding-left: 20px;
  color: var(--ink-soft);
  font-size: .93rem;
}
.card-body li{ margin-bottom: 4px; }

.card-links{
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.card-links li{
  border-bottom: 1px solid var(--line);
}
.card-links a{
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  font-size: .92rem;
  font-weight: 500;
  color: var(--ink);
}
.card-links a:hover{ background: var(--sand); color: var(--orange-dark); }
.card-links a::before{
  content: "→";
  color: var(--orange);
  font-weight: 700;
}

/* ---------- Diagnóstico buttons block ---------- */
.diag-box{
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 28px;
  box-shadow: var(--shadow-card);
  max-width: 640px;
}
.diag-box .btn{ margin: 6px 10px 6px 0; }
.note{
  font-size: .85rem;
  color: var(--ink-soft);
  border-left: 3px solid var(--orange);
  padding: 4px 14px;
  margin-top: 18px;
}

/* ---------- Footer ---------- */
footer.site-footer{
  margin-top: 50px;
  border-top: 3px solid var(--ink);
  background: var(--sand);
  padding: 22px 0;
  text-align: center;
  font-size: .85rem;
  color: var(--ink-soft);
}
footer.site-footer img{ height: 16px; vertical-align: middle; margin: 0 4px; }

/* ---------- Responsive ---------- */
@media (max-width: 760px){
  .nav-toggle{ display:block; }
  nav.main-nav{
    display: none;
    width: 100%;
    flex-direction: column;
    padding-top: 8px;
  }
  nav.main-nav.open{ display: flex; }
  .timeline{ padding-left: 26px; }
  .timeline-step::before{ left: -38px; width: 26px; height: 26px; font-size: .75rem; }
}

/* Respeta preferencia de menos movimiento */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  .btn{ transition: none; }
}

/* Foco visible para accesibilidad */
a:focus-visible, .btn:focus-visible, button:focus-visible{
  outline: 3px solid var(--teal);
  outline-offset: 2px;
}