/* ============================================================
   Visor de apuntes Markdown — estilo Obsidian, 3 temas.
   Temas: data-theme="brand" (oscuro on-brand, def)
        | "paper" (claro)
        | "obsidian" (oscuro morado clásico)
   Fuentes: Bricolage Grotesque (títulos) + Manrope (cuerpo).
   ============================================================ */

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

/* ---------- TEMA: marca (oscuro, def) ---------- */
:root,
[data-theme="brand"] {
  --bg:        #0d0f12;
  --bg-grid:   rgba(244, 247, 245, 0.035);
  --surface:   #16181c;
  --border:    rgba(244, 247, 245, 0.12);
  --ink:       #f4f7f5;
  --muted:     #868d89;
  --accent:    #2ee6c5;
  --accent-2:  #b8ff3c;
  --link:      #2ee6c5;
  --code-bg:   #11141a;
  --code-ink:  #b8ff3c;
  --quote-bar: #2ee6c5;
  --font-display: 'Bricolage Grotesque', system-ui, sans-serif;
  --font-body:    'Manrope', system-ui, sans-serif;
  color-scheme: dark;
}

/* ---------- TEMA: papel (claro) ---------- */
[data-theme="paper"] {
  --bg:        #eef2ef;
  --bg-grid:   rgba(13, 15, 18, 0.045);
  --surface:   #ffffff;
  --border:    rgba(13, 15, 18, 0.14);
  --ink:       #1a1d1b;
  --muted:     #5a635f;
  --accent:    #0f9e86;
  --accent-2:  #4fb31f;
  --link:      #0f9e86;
  --code-bg:   #f3f5f2;
  --code-ink:  #b1320a;
  --quote-bar: #0f9e86;
  --font-display: 'Bricolage Grotesque', system-ui, sans-serif;
  --font-body:    'Manrope', system-ui, sans-serif;
  color-scheme: light;
}

/* ---------- TEMA: Obsidian (oscuro morado) ---------- */
[data-theme="obsidian"] {
  --bg:        #1e1e1e;
  --bg-grid:   rgba(255, 255, 255, 0.025);
  --surface:   #262626;
  --border:    rgba(255, 255, 255, 0.10);
  --ink:       #dcddde;
  --muted:     #999;
  --accent:    #a882ff;
  --accent-2:  #7d6cff;
  --link:      #a882ff;
  --code-bg:   #2a2a2e;
  --code-ink:  #e0a3ff;
  --quote-bar: #a882ff;
  --font-display: 'Bricolage Grotesque', system-ui, sans-serif;
  --font-body:    'Manrope', system-ui, sans-serif;
  color-scheme: dark;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  transition: background-color .35s ease, color .35s ease;
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--bg-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px);
  background-size: 32px 32px;
}

/* ===================== TOPBAR ===================== */
.viewer-topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.vt-brand {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: .9rem;
  letter-spacing: .02em;
  color: var(--ink);
  text-decoration: none;
  transition: color .2s ease;
}
.vt-brand:hover { color: var(--accent); }

.vt-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.vt-theme {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.vt-theme-label {
  font-size: .78rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
}
#theme-select {
  font-family: var(--font-body);
  font-size: .85rem;
  font-weight: 600;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 10px;
  cursor: pointer;
}
#theme-select:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.vt-gh {
  font-size: .82rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color .2s ease, color .2s ease;
}
.vt-gh:hover { border-color: var(--accent); }

/* ===================== LAYOUT ===================== */
.viewer-main {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  padding: 48px 24px 96px;
}

.md-content {
  width: 100%;
  max-width: 76ch;
  line-height: 1.7;
  font-size: 1.05rem;
}

.md-loading,
.md-error {
  color: var(--muted);
  text-align: center;
  padding: 64px 0;
}
.md-error h1 { color: var(--ink); border: 0; margin-bottom: 12px; }
.md-error a { color: var(--accent); }
.md-error code {
  background: var(--code-bg);
  padding: 1px 6px;
  border-radius: 4px;
}

/* ===================== TIPOGRAFÍA DEL APUNTE ===================== */
.md-content h1,
.md-content h2,
.md-content h3,
.md-content h4,
.md-content h5,
.md-content h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink);
  margin: 2em 0 .6em;
}
.md-content h1 {
  font-size: 2.1rem;
  margin-top: 0;
  padding-bottom: .3em;
  border-bottom: 2px solid var(--border);
}
.md-content h2 {
  font-size: 1.6rem;
  padding-bottom: .25em;
  border-bottom: 1px solid var(--border);
}
.md-content h3 { font-size: 1.3rem; }
.md-content h4 { font-size: 1.1rem; }
.md-content h5,
.md-content h6 { font-size: 1rem; color: var(--muted); }

.md-content p { margin: 0 0 1.1em; }

.md-content a {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid color-mix(in srgb, var(--link) 40%, transparent);
  transition: border-color .15s ease;
}
.md-content a:hover { border-bottom-color: var(--link); }

.md-content ul,
.md-content ol { margin: 0 0 1.1em 1.4em; }
.md-content li { margin: .3em 0; }
.md-content li > ul,
.md-content li > ol { margin-bottom: 0; }

.md-content blockquote {
  margin: 1.2em 0;
  padding: .6em 1.1em;
  border-left: 3px solid var(--quote-bar);
  background: var(--surface);
  border-radius: 0 8px 8px 0;
  color: var(--muted);
}
.md-content blockquote p:last-child { margin-bottom: 0; }

.md-content code {
  font-family: ui-monospace, "SFMono-Regular", "JetBrains Mono", Menlo, monospace;
  font-size: .9em;
  background: var(--code-bg);
  color: var(--code-ink);
  padding: 2px 6px;
  border-radius: 5px;
}
.md-content pre {
  margin: 1.2em 0;
  padding: 16px 18px;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow-x: auto;
}
.md-content pre code {
  background: none;
  color: var(--ink);
  padding: 0;
  font-size: .88rem;
  line-height: 1.55;
}

.md-content img {
  max-width: 100%;
  height: auto;
  border-radius: 10px;
  margin: 1em 0;
}

.md-content hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 2.4em 0;
}

/* Tablas con scroll en móvil */
.md-content table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  margin: 1.4em 0;
  font-size: .95rem;
}
.md-content th,
.md-content td {
  border: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
}
.md-content th {
  background: var(--surface);
  font-weight: 700;
}
.md-content tr:nth-child(even) td {
  background: color-mix(in srgb, var(--surface) 50%, transparent);
}

.md-content strong { color: var(--ink); font-weight: 700; }
.md-content em { color: var(--ink); }

/* Marcado de tareas (GFM-ish, por si markdown-it lo emite) */
.md-content input[type="checkbox"] { margin-right: .5em; }

/* ===================== FOOTER ===================== */
.viewer-footer {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 32px 24px 48px;
  font-size: .85rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}
.viewer-footer a { color: var(--accent); text-decoration: none; }

/* ===================== MATEMÁTICAS (KaTeX) ===================== */
/* KaTeX hereda el color del texto, así que se adapta a cada tema. */
.md-content .katex { font-size: 1.05em; }
.md-content .katex-display { overflow-x: auto; overflow-y: hidden; padding: .35rem 0; }

/* ===================== RESPONSIVE ===================== */
@media (max-width: 640px) {
  .viewer-topbar { flex-wrap: wrap; gap: 10px; padding: 10px 14px; }
  .vt-actions { gap: 10px; }
  .vt-theme-label { display: none; }
  .viewer-main { padding: 32px 16px 72px; }
  .md-content { font-size: 1rem; }
  .md-content h1 { font-size: 1.7rem; }
  .md-content h2 { font-size: 1.4rem; }
}