/* ═══════════════════════════════════════════════════════════
   Diario de aprendizaje: entre finanzas y algoritmos — Sara Díaz Martín
   ═══════════════════════════════════════════════════════════ */

:root {
  --paper:      #fdfbf7;
  --paper-alt:  #f4efe6;
  --paper-warm: #f0ebe0;
  --ink:        #16151a;
  --ink-soft:   #5a5761;
  --line:       #e4ddd0;
  --line-dark:  #33313a;

  --accent:      #dd5828;
  --accent-deep: #b8421c;
  --accent-tint: #fbeae1;
  --blue:        #26468c;
  --blue-tint:   #e5eaf5;

  --display: "Bricolage Grotesque", "Helvetica Neue", Arial, sans-serif;
  --text:    "Newsreader", Georgia, "Times New Roman", serif;

  --wrap: 66rem;
  --pad:  clamp(1.25rem, 5vw, 3.25rem);
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--text);
  font-size: 19px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 {
  font-family: var(--display);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.12;
  margin: 0;
  text-wrap: balance;
}

a { color: var(--accent-deep); text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { color: var(--accent); }
img, svg, iframe { max-width: 100%; }
img { height: auto; }
strong { font-weight: 600; }

::selection { background: var(--accent); color: #fff; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

/* Un único contenedor: TODO se alinea a su borde izquierdo. */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.skip {
  position: absolute; left: -9999px;
  background: var(--ink); color: var(--paper);
  padding: 0.7rem 1.1rem; z-index: 20;
  font-family: var(--display); font-size: 0.9rem;
}
.skip:focus { left: 0.75rem; top: 0.75rem; }

/* ── Barra superior ─────────────────────────────────────── */
.topbar {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 10;
}
.topbar__in {
  display: flex; flex-wrap: wrap; align-items: center;
  justify-content: space-between; gap: 0.75rem 1.5rem;
  padding-block: 0.9rem;
}
.brand { display: flex; align-items: center; gap: 0.6rem; text-decoration: none; color: var(--ink); }
.brand__glyph { display: grid; grid-template-columns: 7px 7px; grid-template-rows: 7px 7px; gap: 2px; }
.brand__glyph i { display: block; background: var(--ink); }
.brand__glyph i:first-child { grid-area: 1 / 1; }
.brand__glyph i:last-child  { grid-area: 2 / 2; background: var(--accent); }
.brand__name { font-family: var(--display); font-weight: 600; font-size: 1rem; letter-spacing: -0.02em; }

.nav {
  display: flex; flex-wrap: wrap; gap: 0.25rem 1.4rem;
  font-family: var(--display); font-size: 0.86rem;
  min-width: 0; max-width: 100%;
}
.nav a {
  color: var(--ink-soft); text-decoration: none;
  padding-block: 0.2rem; border-bottom: 2px solid transparent;
}
.nav a:hover { color: var(--ink); border-bottom-color: var(--line); }
.nav a[aria-current="page"] { color: var(--ink); border-bottom-color: var(--accent); font-weight: 600; }

/* ── Cabecera de entrada ────────────────────────────────── */
.lede { padding-block: clamp(3.5rem, 9vw, 7rem) clamp(2.5rem, 6vw, 4.5rem); }
.lede--sub { padding-block: clamp(3rem, 7vw, 5rem) clamp(2rem, 5vw, 3.5rem); }

.kicker {
  font-family: var(--display);
  font-size: 0.78rem; font-weight: 600;
  letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 1.4rem;
}

.lede__h1 {
  font-size: clamp(2rem, 9vw, 6.6rem);
  font-weight: 800; letter-spacing: -0.045em; line-height: 0.92;
  margin: 0;
  overflow-wrap: break-word;
}
.lede__h1--sub { font-size: clamp(1.75rem, 7vw, 4.6rem); }
.lede__h1--long { font-size: clamp(1.7rem, 6vw, 3.9rem); letter-spacing: -0.035em; line-height: 1.02; }
.lede__h1-alt { color: var(--accent); }

.lede__sub {
  margin: 1.8rem 0 0; max-width: 34em;
  font-size: clamp(1.1rem, 2.2vw, 1.35rem);
  line-height: 1.5; color: var(--ink-soft);
}
.byline {
  margin: 2rem 0 0; font-family: var(--display);
  font-size: 0.85rem; letter-spacing: 0.03em; color: var(--ink-soft);
}

/* ── Secciones ──────────────────────────────────────────── */
.sec { padding-block: clamp(3rem, 7vw, 5.5rem); }
.sec--dark { background: var(--ink); color: #e9e6e0; }
.sec--dark h2, .sec--dark h3, .sec--dark strong { color: var(--paper); }
.sec--dark a { color: #f4a07a; }
.sec--tint { background: var(--paper-alt); }
.sec--fig  { background: var(--paper-alt); padding-block: clamp(2.5rem, 5vw, 3.5rem); }
.sec--next { padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(4rem, 9vw, 7rem); }

.stepnum {
  font-family: var(--display); font-weight: 800;
  font-size: 2.6rem; line-height: 1; letter-spacing: -0.04em;
  color: var(--accent); margin: 0 0 0.5rem;
}
.sec--dark .stepnum { color: var(--accent); opacity: 0.95; }

.sec__h2 { font-size: clamp(1.75rem, 4vw, 2.6rem); max-width: 20ch; }
.sec__note { margin: 1rem 0 0; max-width: 46ch; color: var(--ink-soft); font-size: 1.02rem; }
.sec--dark .sec__note { color: #a9a4b0; }

/* ── Prosa ──────────────────────────────────────────────── */
.prose { margin-top: 1.6rem; }
.prose p { max-width: 36em; margin: 0 0 1.15em; }
.prose__first::first-letter {
  font-family: var(--display); font-weight: 800;
  font-size: 3.1rem; line-height: 0.82;
  float: left; padding: 0.1em 0.12em 0 0; color: var(--accent);
}

.pull {
  max-width: 30em !important;
  margin: 2rem 0 0;
  padding-left: 1.4rem;
  border-left: 3px solid var(--accent);
  font-size: clamp(1.15rem, 2.3vw, 1.42rem);
  line-height: 1.42;
  font-style: italic;
}
.pull--wide { max-width: 38em !important; margin-top: 2.5rem; }
.pull--light { color: var(--paper); }

/* ── Lista "qué voy a hacer" ────────────────────────────── */
.uses { list-style: none; margin: 2.5rem 0 0; padding: 0; display: grid; gap: 0; }
.uses li { padding: 1.6rem 0; border-top: 1px solid var(--line); display: grid; gap: 0.15rem 1.6rem; }
.uses li:last-child { border-bottom: 1px solid var(--line); }
.uses__n {
  font-family: var(--display); font-weight: 800; font-size: 0.9rem;
  color: var(--accent); letter-spacing: 0.05em;
}
.uses h3 { font-size: 1.3rem; }
.uses p { margin: 0.35rem 0 0; max-width: 40em; color: var(--ink-soft); }

@media (min-width: 44rem) {
  .uses li { grid-template-columns: 3.5rem 1fr; }
  .uses__n { grid-row: 1 / 3; padding-top: 0.35rem; }
}

/* ── Los cuatro ejes ────────────────────────────────────── */
.axes {
  display: grid; gap: 1px; margin-top: 2.2rem;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}
@media (min-width: 48rem) { .axes { grid-template-columns: 1fr 1fr; } }
.axis { background: var(--ink); padding: 1.5rem 1.6rem; }
.axis__h { font-size: 0.8rem; font-family: var(--display); font-weight: 600;
  letter-spacing: 0.11em; text-transform: uppercase; color: #8d8898; margin: 0; }
.axis__lbl {
  font-family: var(--display); font-weight: 600;
  font-size: 1.3rem; letter-spacing: -0.02em;
  color: var(--accent); margin: 0.35rem 0 0.7rem;
}
.axis--new .axis__lbl { color: #7fa3e8; }
.axis p:last-child { margin: 0; font-size: 0.98rem; max-width: none; }

/* ── Fases de la propuesta ──────────────────────────────── */
.steps { margin-top: 2.4rem; display: grid; gap: 0; }
.steps .step { padding: 1.7rem 0; border-top: 1px solid var(--line); }
.steps .step:last-child { border-bottom: 1px solid var(--line); }
.step__k {
  font-family: var(--display); font-weight: 600; font-size: 0.78rem;
  letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--accent); margin: 0 0 0.6rem;
}
.step p:last-child { margin: 0; max-width: 40em; }

/* ── Figuras ────────────────────────────────────────────── */
.fig { margin: 0; }
.fig__svg {
  display: block; width: 100%; height: auto;
  background: var(--paper); border: 1px solid var(--line);
  padding: 1rem;
}
.fig__cap {
  margin: 0.9rem 0 0; max-width: 48em;
  font-size: 0.88rem; line-height: 1.55; color: var(--ink-soft);
}

.video {
  position: relative; margin-top: 1.8rem;
  max-width: 46rem; aspect-ratio: 16 / 9;
  border: 1px solid var(--line); background: var(--ink);
}
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

/* ── Tablas ─────────────────────────────────────────────── */
.tablebox { margin-top: 2.2rem; overflow-x: auto; }
.tbl { border-collapse: collapse; width: 100%; min-width: 42rem; font-size: 0.95rem; }
.tbl caption {
  caption-side: bottom; text-align: left;
  font-size: 0.85rem; color: var(--ink-soft); padding-top: 0.9rem; max-width: 48em;
}
.tbl th, .tbl td {
  text-align: left; vertical-align: top;
  padding: 0.85rem 1rem 0.85rem 0; border-bottom: 1px solid var(--line);
}
.tbl td + td, .tbl th + th, .tbl th + td { padding-left: 1.2rem; }
.tbl thead th {
  font-family: var(--display); font-weight: 600; font-size: 0.76rem;
  letter-spacing: 0.11em; text-transform: uppercase; color: var(--ink-soft);
  border-bottom: 2px solid var(--ink); padding-top: 0;
}
.tbl tbody th[scope="row"] {
  font-family: var(--display); font-weight: 600; font-size: 0.95rem;
  width: 9rem; letter-spacing: -0.01em;
}
.tbl--cmp td:last-child { background: rgba(221, 88, 40, 0.045); }
.tbl td:nth-child(2) { white-space: nowrap; }

.lv {
  display: inline-block; font-family: var(--display);
  font-size: 0.76rem; font-weight: 600; letter-spacing: 0.01em;
  padding: 0.2rem 0.55rem; border-radius: 3px; white-space: nowrap;
}
.lv--lo   { background: #e2ddd2; color: #4a463d; }
.lv--hi   { background: var(--blue); color: #fff; }
.lv--meta { background: var(--accent-tint); color: var(--accent-deep); }

/* ── Hoja de ruta ───────────────────────────────────────── */
.road { list-style: none; margin: 2rem 0 0; padding: 0; }
.road li {
  display: flex; align-items: baseline; gap: 1.1rem;
  padding: 0.75rem 0; border-bottom: 1px solid var(--line);
  max-width: 44em;
}
.road li:first-child { border-top: 1px solid var(--line); }
.road__n {
  font-family: var(--display); font-weight: 600; font-size: 0.82rem;
  color: var(--accent); flex: none; width: 1.8rem; letter-spacing: 0.04em;
}
.road__t { font-size: 1.02rem; }

/* ── Referencias ────────────────────────────────────────── */
.refs { list-style: none; margin: 0; padding: 0; max-width: 46em; }
.refs li {
  padding: 0 0 0 2.4rem; text-indent: -2.4rem;
  margin-bottom: 1.1rem; font-size: 0.98rem; line-height: 1.55;
}

/* ── Tarjeta siguiente entrada ──────────────────────────── */
.nextcard {
  display: block; max-width: 40rem;
  padding: 2rem 2.2rem 1.8rem;
  background: var(--ink); color: #e9e6e0;
  text-decoration: none;
  transition: transform 0.15s ease;
}
.nextcard:hover { transform: translateY(-3px); color: #e9e6e0; }
.nextcard__k {
  display: block; font-family: var(--display); font-weight: 600;
  font-size: 0.76rem; letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 0.8rem;
}
.nextcard__h {
  display: block; font-family: var(--display); font-weight: 600;
  font-size: clamp(1.5rem, 3.5vw, 2.1rem); letter-spacing: -0.03em;
  line-height: 1.08; color: var(--paper); margin-bottom: 0.9rem;
}
.nextcard__p { display: block; font-size: 1rem; color: #a9a4b0; max-width: 34em; }
.nextcard__go {
  display: inline-block; margin-top: 1.4rem;
  font-family: var(--display); font-weight: 600; font-size: 0.9rem;
  color: var(--accent);
}

.entrynav {
  display: flex; flex-wrap: wrap; gap: 1.5rem;
  margin: 3rem 0 0; padding-top: 1.5rem;
  border-top: 1px solid var(--line-dark);
  font-family: var(--display); font-size: 0.9rem;
  max-width: none;
}

/* ── Pie ────────────────────────────────────────────────── */
.foot { border-top: 1px solid var(--line); padding-block: 3rem 3.5rem; }
.foot__in p { margin: 0 0 0.7rem; max-width: 44em; font-size: 0.92rem; color: var(--ink-soft); }
.foot__who strong { color: var(--ink); }
.foot__sig { font-family: var(--display); font-size: 0.85rem; }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 40rem) {
  body { font-size: 18px; }
  .topbar { position: static; }
  .prose__first::first-letter { font-size: 2.6rem; }
  .stepnum { font-size: 2.1rem; }
  .tbl tbody th[scope="row"] { width: auto; }
}

/* ── Impresión ──────────────────────────────────────────── */
@media print {
  .topbar, .nav, .skip, .entrynav, .video, .nextcard { display: none !important; }
  body { background: #fff; font-size: 11pt; }
  .sec--dark, .sec--tint, .sec--fig { background: #fff !important; }
  .sec--dark, .sec--dark p, .sec--dark h2, .sec--dark h3 { color: #000 !important; }
  .axes { border-color: #999; background: #999; }
  .axis { background: #fff; }
  .axis p, .axis__h { color: #333 !important; }
  .sec { padding-block: 1.2rem; break-inside: avoid; }
  a { color: #000; }
}

/* ── Retrato de la entrada 01 ───────────────────────────── */
.portrait { margin: 0; max-width: 17rem; }
.portrait img {
  display: block; width: 100%; height: auto;
  border: 1px solid var(--line);
}
.portrait figcaption {
  margin-top: 0.7rem; font-size: 0.8rem; color: var(--ink-soft);
  font-family: var(--display);
}

/* ── Antes / después ────────────────────────────────────── */
.ba {
  margin: 2.2rem 0 0;
  display: grid; gap: 1.5rem;
}
@media (min-width: 46rem) { .ba { grid-template-columns: 1fr 1fr; } }
.ba__item { margin: 0; }
.ba__item img {
  display: block; width: 100%; aspect-ratio: 3 / 2;
  object-fit: cover; border: 1px solid var(--line);
  filter: grayscale(1) contrast(1.05);
}
.ba__item--after img { filter: none; }
.ba__k {
  margin: 0.8rem 0 0.25rem;
  font-family: var(--display); font-weight: 600; font-size: 0.78rem;
  letter-spacing: 0.13em; text-transform: uppercase; color: var(--ink-soft);
}
.ba__item--after .ba__k { color: var(--accent); }
.ba__t { margin: 0; font-size: 0.98rem; color: var(--ink-soft); max-width: 30em; }
.ba > .fig__cap { grid-column: 1 / -1; margin-top: 0.4rem; }

/* ── Créditos de imagen ─────────────────────────────────── */
.credits { margin: 1.5rem 0 0; padding: 0; list-style: none; max-width: 44em; }
.credits li {
  padding: 0.6rem 0; border-bottom: 1px solid var(--line-dark);
  font-size: 0.94rem;
}
.credits li:first-child { border-top: 1px solid var(--line-dark); }

/* ── Presentación con retrato al lado ───────────────────── */
.intro { margin-top: 1.8rem; display: grid; gap: 1.6rem 2.4rem; align-items: start; }
@media (min-width: 52rem) {
  .intro { grid-template-columns: 17rem minmax(0, 1fr); }
  .intro .portrait { position: sticky; top: 5rem; }
}
.intro .prose { margin-top: 0; }
.intro .prose p { max-width: 34em; }