/* ============================================================================
   Instituto Kune — Blog
   Identidad propia, sobria. Familia de marca (azul Kune + mono) con su propia
   voz editorial. NO usa el "expediente intervenido" de Garabato (sin crayones,
   sin sellos duros, sin Gochi Hand).

   Color:  papel frío + tinta + un solo acento azul Kune.
   Tipo:   IBM Plex Mono (etiquetas/meta) + Spectral (titulares y lectura).
   Firma:  "el hilo" — un filete azul de 1px que conecta los elementos.
   ============================================================================ */

:root {
  --papel:      #F2F3F0;
  --papel-alt:  #FBFBF9;
  --tinta:      #17181C;
  --tinta-70:   rgba(23, 24, 28, 0.70);
  --tinta-55:   rgba(23, 24, 28, 0.55);
  --tinta-media:#5A5C63;
  --kune:       #2B3FD6;
  --kune-dk:    #1E2A78;
  --filete:     rgba(23, 24, 28, 0.12);
  --filete-ft:  rgba(23, 24, 28, 0.07);

  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  --serif: 'Spectral', Georgia, 'Times New Roman', serif;

  --medida: 40rem;          /* ~68ch de lectura */
  --ancho:  46rem;          /* contenedor general */
  --ancho-lg: 60rem;        /* editor / dashboard */

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ── Reset ─────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--serif);
  background: var(--papel);
  color: var(--tinta);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--kune); text-decoration: none; }
a:hover { color: var(--kune-dk); }
button { font-family: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--kune); outline-offset: 3px; border-radius: 1px; }

/* ── Tipografía utilitaria ─────────────────────────────────────────────── */
.mono { font-family: var(--mono); }
.eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--kune);
}
.meta {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--tinta-media);
}

/* ── Layout base ───────────────────────────────────────────────────────── */
.wrap { width: 100%; max-width: var(--ancho); margin: 0 auto; padding: 0 1.5rem; }
.wrap-lg { max-width: var(--ancho-lg); }
.page { min-height: 100vh; display: flex; flex-direction: column; }
.page > main { flex: 1 0 auto; width: 100%; }

/* ── Header / nav ──────────────────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--papel) 88%, transparent);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--filete);
}
.site-header .wrap {
  max-width: var(--ancho-lg);
  display: flex; align-items: center; justify-content: space-between;
  height: 4rem; gap: 1.5rem;
}
.brand {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-family: var(--mono); font-weight: 600; font-size: 1.02rem;
  letter-spacing: -0.01em; color: var(--tinta);
}
.brand:hover { color: var(--tinta); }
/* el hilo del wordmark */
.brand::before {
  content: ""; width: 14px; height: 14px; flex: none;
  border: 1.5px solid var(--kune); border-radius: 50%;
  box-shadow: inset 0 0 0 3px var(--papel), inset 0 0 0 4.5px var(--kune);
}
.brand small {
  font-size: 0.62rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--tinta-media); font-weight: 500;
}
.nav { display: flex; align-items: center; gap: 1.4rem; }
.nav a, .nav button.linklike {
  font-family: var(--mono); font-size: 0.74rem; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--tinta-70); background: none; border: none; padding: 0;
}
.nav a:hover, .nav button.linklike:hover { color: var(--kune); }
.nav a[aria-current="page"] { color: var(--tinta); }
.nav .sep { width: 1px; height: 1rem; background: var(--filete); }
.nav-hidden { display: none !important; }

/* ── Botones ───────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  font-family: var(--mono); font-size: 0.78rem; font-weight: 500;
  letter-spacing: 0.04em; line-height: 1;
  padding: 0.72rem 1.25rem; border: 1px solid var(--tinta);
  background: var(--tinta); color: var(--papel);
  transition: background 0.18s var(--ease), color 0.18s var(--ease), border-color 0.18s var(--ease), transform 0.12s var(--ease);
}
.btn:hover { background: var(--kune); border-color: var(--kune); color: #fff; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--kune); border-color: var(--kune); color: #fff; }
.btn-primary:hover { background: var(--kune-dk); border-color: var(--kune-dk); color: #fff; }
.btn-ghost { background: transparent; color: var(--tinta); }
.btn-ghost:hover { background: var(--tinta); color: var(--papel); border-color: var(--tinta); }
.btn-sm { padding: 0.5rem 0.85rem; font-size: 0.72rem; }
.btn[disabled] { opacity: 0.5; pointer-events: none; }

.textlink {
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.03em;
  color: var(--kune); display: inline-flex; align-items: center; gap: 0.35rem;
}
.textlink:hover { gap: 0.55rem; }

/* ── Index: masthead ───────────────────────────────────────────────────── */
.masthead { padding: 4.5rem 0 2.75rem; }
.masthead .eyebrow { display: block; margin-bottom: 1.1rem; }
.masthead h1 {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(2.5rem, 6vw, 4rem); line-height: 1.04;
  letter-spacing: -0.018em; text-wrap: balance; max-width: 18ch;
}
.masthead p {
  margin-top: 1.4rem; max-width: 42ch; color: var(--tinta-70);
  font-size: 1.18rem; line-height: 1.6;
}

/* ── Index: lista de posts con "el hilo" ───────────────────────────────── */
.post-list { padding-bottom: 5rem; position: relative; }
.post-list .hilo-track {
  position: relative;
  border-top: 1px solid var(--filete);
}
.post-item {
  position: relative;
  display: block;
  padding: 2.25rem 0 2.25rem 2.25rem;
  border-bottom: 1px solid var(--filete);
}
/* el hilo vertical + nodo por entrada */
.post-item::before {
  content: ""; position: absolute; left: 4px; top: 0; bottom: 0;
  width: 1px; background: var(--filete);
}
.post-item::after {
  content: ""; position: absolute; left: 0px; top: 2.9rem;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--papel); border: 1.5px solid var(--kune);
  transition: background 0.2s var(--ease);
}
.post-item:hover::after { background: var(--kune); }
.post-item .post-date { display: block; margin-bottom: 0.6rem; }
.post-item h2 {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(1.5rem, 3.4vw, 2.05rem); line-height: 1.12;
  letter-spacing: -0.012em; color: var(--tinta);
  transition: color 0.18s var(--ease);
}
.post-item:hover h2 { color: var(--kune); }
.post-item .excerpt {
  margin-top: 0.7rem; color: var(--tinta-70); max-width: 54ch;
  font-size: 1.08rem; line-height: 1.6;
}
.post-item .post-foot {
  margin-top: 0.95rem; display: flex; flex-wrap: wrap; gap: 0.75rem 1.1rem;
  align-items: center;
}
.tag {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--kune);
  border: 1px solid var(--filete); padding: 0.18rem 0.5rem;
}

/* ── Artículo (post) ───────────────────────────────────────────────────── */
.article { padding: 3.5rem 0 5rem; }
.article-head { max-width: var(--medida); margin: 0 auto; padding-left: 1.75rem; position: relative; }
/* el hilo conecta eyebrow → título → autoría */
.article-head::before {
  content: ""; position: absolute; left: 0; top: 0.35rem; bottom: 0.35rem;
  width: 1px; background: var(--kune); opacity: 0.55;
}
.article-head .eyebrow { display: block; margin-bottom: 1rem; }
.article-head h1 {
  font-family: var(--serif); font-weight: 600;
  font-size: clamp(2.1rem, 5vw, 3.25rem); line-height: 1.08;
  letter-spacing: -0.016em; text-wrap: balance;
}
.byline {
  margin-top: 1.4rem; display: flex; flex-wrap: wrap; align-items: center;
  gap: 0.5rem 0.9rem;
}
.byline .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--tinta-media); }
.cover {
  max-width: var(--ancho); margin: 2.75rem auto 0; padding: 0 0;
  border: 1px solid var(--filete);
}
.cover img { width: 100%; }

/* ── Prosa (markdown renderizado) ──────────────────────────────────────── */
.prose { max-width: var(--medida); margin: 2.75rem auto 0; }
.prose > * + * { margin-top: 1.5rem; }
.prose p { font-size: 1.2rem; line-height: 1.72; color: rgba(23,24,28,0.86); }
.prose h2 {
  font-family: var(--serif); font-weight: 600; font-size: 1.75rem;
  line-height: 1.2; letter-spacing: -0.01em; margin-top: 2.75rem;
}
.prose h3 {
  font-family: var(--serif); font-weight: 600; font-size: 1.35rem;
  line-height: 1.25; margin-top: 2.25rem;
}
.prose a { text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; text-decoration-color: rgba(43,63,214,0.4); }
.prose a:hover { text-decoration-color: var(--kune); }
.prose strong { font-weight: 600; }
.prose em { font-style: italic; }
.prose ul, .prose ol { padding-left: 1.4rem; }
.prose li { font-size: 1.2rem; line-height: 1.7; margin-top: 0.5rem; color: rgba(23,24,28,0.86); }
.prose li::marker { color: var(--kune); }
.prose blockquote {
  border-left: 2px solid var(--kune); padding: 0.2rem 0 0.2rem 1.4rem;
  font-style: italic; color: var(--tinta-70); font-size: 1.25rem;
}
.prose img { margin: 2rem auto; border: 1px solid var(--filete); }
.prose code {
  font-family: var(--mono); font-size: 0.88em;
  background: rgba(23,24,28,0.05); padding: 0.12em 0.35em; border-radius: 2px;
}
.prose pre {
  font-family: var(--mono); font-size: 0.88rem; line-height: 1.6;
  background: var(--tinta); color: #E8E8E4; padding: 1.1rem 1.25rem;
  overflow-x: auto;
}
.prose pre code { background: none; padding: 0; color: inherit; }
.prose hr { border: none; border-top: 1px solid var(--filete); margin: 2.75rem 0; }

.article-foot {
  max-width: var(--medida); margin: 3.25rem auto 0; padding-top: 1.75rem;
  border-top: 1px solid var(--filete);
  display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between;
}

/* ── Save (bookmark) ───────────────────────────────────────────────────── */
.save-btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.04em;
  color: var(--tinta-70); background: none; border: 1px solid var(--filete);
  padding: 0.5rem 0.85rem; transition: all 0.18s var(--ease);
}
.save-btn:hover { border-color: var(--kune); color: var(--kune); }
.save-btn[aria-pressed="true"] { color: var(--kune); border-color: var(--kune); background: rgba(43,63,214,0.06); }
.save-btn svg { width: 14px; height: 14px; }

/* ── Auth (login) ──────────────────────────────────────────────────────── */
.auth { max-width: 25rem; margin: 0 auto; padding: 4.5rem 0 5rem; }
.auth h1 { font-family: var(--serif); font-weight: 600; font-size: 2rem; line-height: 1.1; }
.auth .sub { margin-top: 0.65rem; color: var(--tinta-70); }
.tabs { display: flex; gap: 0; margin: 2rem 0 1.5rem; border-bottom: 1px solid var(--filete); }
.tab {
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--tinta-media); background: none; border: none; padding: 0.6rem 0.1rem;
  margin-right: 1.6rem; border-bottom: 2px solid transparent; margin-bottom: -1px;
}
.tab[aria-selected="true"] { color: var(--tinta); border-bottom-color: var(--kune); }

/* ── Formularios ───────────────────────────────────────────────────────── */
.field { margin-bottom: 1.1rem; }
.field label {
  display: block; font-family: var(--mono); font-size: 0.7rem; font-weight: 500;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--tinta-media);
  margin-bottom: 0.4rem;
}
.input, .textarea, select.input {
  width: 100%; font-family: var(--serif); font-size: 1rem; color: var(--tinta);
  background: var(--papel-alt); border: 1px solid var(--filete);
  padding: 0.7rem 0.85rem; transition: border-color 0.15s var(--ease), box-shadow 0.15s var(--ease);
}
.input:focus, .textarea:focus, select.input:focus {
  outline: none; border-color: var(--kune); box-shadow: 0 0 0 3px rgba(43,63,214,0.12);
}
.input.mono { font-family: var(--mono); font-size: 0.92rem; }
.textarea { resize: vertical; min-height: 6rem; line-height: 1.6; }
.form-msg { font-family: var(--mono); font-size: 0.78rem; margin-top: 0.9rem; min-height: 1.2rem; }
.form-msg.err { color: #C0392B; }
.form-msg.ok  { color: var(--kune); }
.hint { font-family: var(--mono); font-size: 0.7rem; color: var(--tinta-media); margin-top: 0.35rem; }

/* ── Editor ────────────────────────────────────────────────────────────── */
.editor-top {
  position: sticky; top: 4rem; z-index: 40;
  background: color-mix(in srgb, var(--papel) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--filete);
}
.editor-top .wrap {
  max-width: var(--ancho-lg);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  height: 3.5rem;
}
.save-state { font-family: var(--mono); font-size: 0.72rem; color: var(--tinta-media); }
.save-state.saving { color: var(--kune); }

.editor-grid {
  max-width: var(--ancho-lg); margin: 0 auto; padding: 1.5rem;
  display: grid; gap: 1.5rem;
}
.editor-meta { display: grid; gap: 1rem; grid-template-columns: 1fr 1fr; }
.editor-meta .full { grid-column: 1 / -1; }

.title-input {
  width: 100%; font-family: var(--serif); font-weight: 600;
  font-size: clamp(1.8rem, 4vw, 2.5rem); line-height: 1.1; letter-spacing: -0.014em;
  color: var(--tinta); background: none; border: none; padding: 0;
}
.title-input:focus { outline: none; }
.title-input::placeholder { color: rgba(23,24,28,0.25); }

.toolbar { display: flex; flex-wrap: wrap; gap: 0.3rem; padding: 0.5rem 0; border-block: 1px solid var(--filete); }
.toolbar button {
  font-family: var(--mono); font-size: 0.78rem; color: var(--tinta-70);
  background: none; border: 1px solid transparent; padding: 0.35rem 0.55rem; min-width: 2rem;
}
.toolbar button:hover { background: rgba(23,24,28,0.05); border-color: var(--filete); color: var(--tinta); }

.write-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; align-items: start; }
.md-input {
  width: 100%; min-height: 24rem; font-family: var(--mono); font-size: 0.92rem;
  line-height: 1.7; color: var(--tinta); background: var(--papel-alt);
  border: 1px solid var(--filete); padding: 1.1rem; resize: vertical;
}
.md-input:focus { outline: none; border-color: var(--kune); box-shadow: 0 0 0 3px rgba(43,63,214,0.1); }
.preview {
  border: 1px solid var(--filete); background: var(--papel-alt);
  padding: 1.1rem 1.4rem; min-height: 24rem;
}
.preview .prose { margin: 0; max-width: none; }
.preview .prose p, .preview .prose li { font-size: 1.02rem; }
.preview-empty { color: var(--tinta-media); font-family: var(--mono); font-size: 0.8rem; }

.pane-tabs { display: none; gap: 1.2rem; margin-bottom: 0.75rem; }
.pane-tabs button {
  font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--tinta-media); background: none; border: none; padding: 0.3rem 0;
  border-bottom: 2px solid transparent;
}
.pane-tabs button[aria-selected="true"] { color: var(--tinta); border-bottom-color: var(--kune); }

.cover-drop {
  border: 1px dashed var(--filete); padding: 1rem; text-align: center;
  font-family: var(--mono); font-size: 0.78rem; color: var(--tinta-media);
  cursor: pointer; transition: border-color 0.15s var(--ease);
}
.cover-drop:hover { border-color: var(--kune); }
.cover-preview { margin-top: 0.75rem; border: 1px solid var(--filete); }

/* ── Dashboard ─────────────────────────────────────────────────────────── */
.dash { padding: 3rem 0 5rem; }
.dash h1 { font-family: var(--serif); font-weight: 600; font-size: 2.1rem; }
.dash .tabs { margin-top: 1.75rem; }
.row-item {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 1.1rem 0; border-bottom: 1px solid var(--filete);
}
.row-item .row-main { min-width: 0; }
.row-item h3 {
  font-family: var(--serif); font-weight: 600; font-size: 1.2rem; line-height: 1.25;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.row-item h3 a:hover { color: var(--kune); }
.row-item .row-actions { display: flex; gap: 0.5rem; flex: none; }
.badge {
  font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.1em; text-transform: uppercase;
  padding: 0.18rem 0.45rem; border: 1px solid var(--filete); color: var(--tinta-media);
}
.badge.pub { color: var(--kune); border-color: rgba(43,63,214,0.4); }

/* ── Estados vacíos ────────────────────────────────────────────────────── */
.empty {
  text-align: center; padding: 4rem 1rem; color: var(--tinta-media);
}
.empty p { font-family: var(--mono); font-size: 0.85rem; margin-top: 0.5rem; }

/* ── Footer ────────────────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--filete); padding: 2.5rem 0; margin-top: 2rem;
}
.site-footer .wrap {
  max-width: var(--ancho-lg);
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem;
}
.site-footer p, .site-footer a {
  font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.04em; color: var(--tinta-media);
}
.site-footer a:hover { color: var(--kune); }

/* ── Toast ─────────────────────────────────────────────────────────────── */
.toast {
  position: fixed; left: 50%; bottom: 1.5rem; transform: translateX(-50%) translateY(1rem);
  background: var(--tinta); color: var(--papel); font-family: var(--mono);
  font-size: 0.78rem; padding: 0.7rem 1.1rem; opacity: 0; pointer-events: none;
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease); z-index: 200;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Utilidades ────────────────────────────────────────────────────────── */
.hidden { display: none !important; }
.center { text-align: center; }
.loading { font-family: var(--mono); font-size: 0.85rem; color: var(--tinta-media); padding: 2.5rem 0; }

/* ── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .write-grid { grid-template-columns: 1fr; }
  .editor-meta { grid-template-columns: 1fr; }
  .pane-tabs { display: flex; }
  .write-grid .preview.pane-off, .write-grid .md-wrap.pane-off { display: none; }
  .nav { gap: 1rem; }
  .brand small { display: none; }
}

/* ── Reduced motion ────────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}