:root {
  /* Fondos */
  --bg: #05070b;
  --surface: #0a0a0a;
  --surface-2: #11141a;
  --surface-3: #16181d;
  --line: #24262b;

  /* Acento */
  --card-border: #2d0000;
  --card-border-hover: #ff4d4d;
  --red: #ff4d4d;
  --red-dim: #cc0000;
  --red-dark: #8b0000;
  --red-border: #4d0000;

  /* Semanticos */
  --green: #00d084;

  /* Texto */
  --text: #ffffff;
  --text-dim: #cccccc;
  --text-muted: #9aa0a8;

  /* Tipografia */
  /* Fuentes del sistema: sin peticiones a terceros. Si Inter o
     JetBrains Mono estan instaladas en local, se usan. */
  --sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;

  /* Radios: tres pasos, pildora y circulo */
  --r-xs: 4px;
  --r: 8px;
  --r-lg: 12px;
  --r-pill: 999px;

  /* Medidas */
  --content-max: 1280px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html {
  color-scheme: dark;
  background-color: var(--bg);
  scroll-behavior: smooth;
}
/* El atributo hidden siempre gana, aunque la clase defina display */
[hidden] { display: none !important; }
button { font: inherit; color: inherit; }
img, svg { display: block; }
ul { list-style: none; }

/* ── PANTALLA DE CARGA ── */
.splash {
  position: fixed;
  inset: 0;
  z-index: 99999;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  transition: opacity 0.4s ease;
}
.splash.hidden { opacity: 0; pointer-events: none; }
.splash-logo {
  width: 120px;
  height: 120px;
  margin-bottom: 32px;
  border-radius: 24px;
  box-shadow: 0 0 40px rgba(255,77,77,0.3);
}
.splash-track {
  width: 180px;
  height: 3px;
  overflow: hidden;
  background: #1a1a1a;
  border-radius: 3px;
}
.splash-bar {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--red-dark), var(--red));
  border-radius: 3px;
  box-shadow: 0 0 8px rgba(255,77,77,0.5);
  transition: width 0.3s ease;
}
.splash-text {
  margin-top: 16px;
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* Sin JavaScript: el aviso tapa la pantalla de carga */
.noscript-msg {
  position: fixed;
  inset: 0;
  z-index: 100000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 24px;
  background: var(--bg);
  color: var(--text-dim);
  text-align: center;
  line-height: 1.5;
}
.noscript-msg strong { color: var(--red); }

/* Error de carga de datos */
.load-error {
  max-width: 560px;
  margin: clamp(48px, 12vh, 120px) auto 0;
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--red-border);
  border-radius: var(--r-lg);
}
.load-error h1 { font-size: 18px; font-weight: 700; }
.load-error p { color: var(--text-dim); font-size: 14px; line-height: 1.6; }
.load-error-icon { color: var(--red); }
.load-error-icon svg { width: 36px; height: 36px; }
body {
  /* Sin fondo propio: lo pinta html, para que body::before (z-index:-1)
     quede por encima del color y por debajo del contenido. */
  background-color: transparent;
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  min-height: 100vh;
  min-height: 100dvh;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Rejilla de fondo: capa fija propia, sin repintar en cada scroll */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  /* Rejilla apenas insinuada: a plena intensidad competia con el
     contenido, sobre todo en el roadmap, que tiene mucho aire. */
  background-image: linear-gradient(rgba(255,77,77,0.045) 1px, transparent 1px), linear-gradient(90deg, rgba(255,77,77,0.045) 1px, transparent 1px);
  background-size: 72px 72px;
}

/* ═══════════════════════════════════════════════════════════
   NAVEGACION — una sola barra
   Logo, pestanas y cifras comparten una barra de 64px; el rojo
   queda solo para indicar la pestana activa.
   ═══════════════════════════════════════════════════════════ */
.header-wrap {
  position: sticky;
  top: 0;
  z-index: 300;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.header {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 32px);
  height: 64px;
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: clamp(10px, 2vw, 28px);
}
.logo {
  /* Nada de flex aqui: convertiria el texto y el <span> en items
     flex y colapsaria el espacio entre "Hacking" y "Study Planner". */
  display: block;
  align-self: center;
  flex: none;
  font-family: var(--sans);
  font-size: clamp(13px, 1.5vw, 16px);
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  text-align: center;
  line-height: 1;
  white-space: nowrap;
}
.logo span {
  color: var(--red);
  text-shadow: 0 0 14px rgba(255,77,77,0.6);
}

/* Pestanas: ocupan el centro y empujan las cifras a la derecha */
.tabs-bar {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  align-items: stretch;
  gap: 2px;
  overflow-x: auto;
  scrollbar-width: none;
}
.tabs-bar::-webkit-scrollbar { display: none; }
.tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  height: 100%;
  padding: 0 14px;
  position: relative;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: var(--text-muted);
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.2px;
  white-space: nowrap;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--red); border-bottom-color: var(--red); }

.nav-btn-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,0,0,0.15);
  color: var(--red);
  border: 1px solid rgba(255,77,77,0.3);
  border-radius: var(--r-lg);
  font-size: 11px;
  font-weight: 700;
  padding: 1px 7px;
  line-height: 1.4;
}
.tab-btn.active .nav-btn-badge { background: rgba(255,0,0,0.25); border-color: var(--red); }

/* Cifras globales */
.header-stats {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex: none;
  flex-wrap: nowrap;
  gap: 6px;
  margin-left: auto;
}
.stat-item {
  display: flex;
  align-items: baseline;
  gap: 5px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  text-align: center;
  white-space: nowrap;
}
.stat-num { font-size: 13px; font-weight: 700; color: var(--red); font-variant-numeric: tabular-nums; }
.stat-ok { color: var(--green); }
.stat-of { color: var(--text-muted); font-weight: 600; }
.stat-icon { display: none; color: var(--green); align-self: center; }
.stat-icon svg { width: 12px; height: 12px; }
.stat-label {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.6px;
  color: var(--text-muted);
  text-transform: uppercase;
}

/* Barra de progreso de la pestaña */
.tab-progress {
  height: 3px;
  margin-top: 16px;
  overflow: hidden;
  background: var(--surface-3);
  border-radius: var(--r-pill);
}
.tab-progress-bar {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--red-dim), var(--red));
  border-radius: var(--r-pill);
  transition: width 0.5s ease;
}

/* Controles: acompanan al contenido, no son barra fija */
.controls-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 clamp(16px, 3vw, 32px);
}
.controls-search-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: clamp(16px, 2.5vw, 24px) 0 0;
}

/* En movil el buscador ocupa su propia fila y el boton y el
   contador bajan a la siguiente, en vez de estrujarse. */
.search-wrap {
  position: relative;
  flex: 1 1 280px;
  min-width: 0;
}
.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}
.search-icon svg { width: 15px; height: 15px; }
.search-input {
  width: 100%;
  min-height: 38px;
  -webkit-appearance: none;
  appearance: none;
  background: #000000;
  border: 1px solid var(--red-border);
  border-radius: var(--r);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
  padding: 9px 12px 9px 36px;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.search-input::-webkit-search-cancel-button { cursor: pointer; }
.results-count {
  margin-left: auto;
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.search-input:focus {
  border-color: var(--red);
  box-shadow: 0 0 8px rgba(255,77,77,0.3);
}
.search-input::placeholder { color: var(--text-muted); }

/* Filter toggle button */
.btn-filter-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 38px;
  padding: 8px 14px;
  border-radius: var(--r);
  border: 1px solid var(--red-border);
  background: #000;
  color: var(--text-muted);
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s;
  position: relative;
  flex-shrink: 0;
  letter-spacing: 0.5px;
}
.btn-filter-toggle:hover { border-color: var(--red); color: var(--text); }
.btn-filter-toggle:focus { outline: none; }
.btn-filter-toggle:focus-visible { outline: 2px solid var(--red); outline-offset: 2px; }
.btn-filter-toggle:active { transform: scale(0.97); }
.btn-filter-toggle.has-active {
  border-color: var(--red);
  color: var(--red);
  background: rgba(255,0,0,0.1);
}
.filter-active-count {
  background: var(--red);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 1px 5px;
  border-radius: var(--r);
  min-width: 16px;
  text-align: center;
  line-height: 1.5;
}

/* Filter panel (collapsible) */
.filters-panel {
  overflow: hidden;
  max-height: 0;
  transition: max-height 0.28s ease, padding 0.28s ease;
  padding: 0;
}
.filters-panel.open {
  max-height: min(70vh, 720px);
  overflow-y: auto;
  padding: 16px 0 2px;
}
.filters {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r);
}
.filter-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.filter-group {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  flex: 1;
  min-width: 0;
}
.filter-label {
  flex: none;
  width: 104px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  white-space: nowrap;
}
.filter-actions { display: flex; justify-content: flex-end; }
.chip {
  padding: 4px 12px;
  border-radius: var(--r-xs);
  border: 1px solid var(--red-border);
  background: #000000;
  color: var(--text-dim);
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.chip:hover {
  border-color: var(--red);
  color: var(--text);
  background: rgba(255,0,0,0.08);
}
.chip.active {
  background: rgba(255,0,0,0.15);
  border-color: var(--red);
  color: var(--red);
}
.chip-clear {
  padding: 4px 12px;
  border-radius: var(--r-xs);
  border: 1px solid transparent;
  background: none;
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
  transition: color 0.15s;
}
.chip-clear:hover { color: var(--red); }


/* Grid */
.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
  gap: clamp(12px, 1.5vw, 20px);
  padding: clamp(20px, 3vw, 40px) clamp(16px, 3vw, 32px) clamp(20px, 2vw, 32px);
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--card-border);
  border-left: 3px solid var(--card-border);
  border-radius: var(--r);
  padding: 16px;
  transition: border-color 0.2s, transform 0.15s, box-shadow 0.2s, opacity 0.2s;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--red-border), transparent);
  transition: background 0.3s;
}
.card:hover {
  border-color: rgba(255,77,77,0.5);
  border-left-color: rgba(255,77,77,0.7);
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(255,0,0,0.15), 0 4px 20px rgba(0,0,0,0.5);
}
.card:hover::before {
  background: linear-gradient(90deg, transparent, var(--red), transparent);
}
/* Difficulty left border colors */
.card.diff-facil   { border-left-color: #00d084; }
.card.diff-media    { border-left-color: #fcb900; }
.card.diff-dificil  { border-left-color: #ff4d4d; }
.card.diff-insane   { border-left-color: #ff8a7a; }

.card.resolved {
  border-color: rgba(0,208,132,0.2);
  border-left-color: rgba(0,208,132,0.5);
  opacity: 0.78;
}
.card.resolved:hover { opacity: 1; }
.card.resolved::before {
  background: linear-gradient(90deg, transparent, rgba(0,208,132,0.4), transparent);
}

/* Card header */
.card-header {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 10px;
}
.card-title {
  font-family: var(--sans);
  font-size: clamp(14px, 1.5vw, 16px);
  font-weight: 600;
  color: var(--text);
  flex: 1;
  line-height: 1.3;
  word-break: break-word;
}
.card.resolved .card-title { color: var(--green); }

/* Difficulty badges */
.badge-diff {
  flex: none;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: var(--r-xs);
  white-space: nowrap;
  letter-spacing: 0.5px;
}
.badge-diff.diff-facil    { background: rgba(0,208,132,0.15);  color: #00d084; border: 1px solid rgba(0,208,132,0.4); }
.badge-diff.diff-media    { background: rgba(252,185,0,0.15);   color: #fcb900; border: 1px solid rgba(252,185,0,0.4); }
.badge-diff.diff-dificil  { background: rgba(255,77,77,0.15);   color: #ff4d4d; border: 1px solid rgba(255,77,77,0.4); }
.badge-diff.diff-insane   { background: rgba(255,122,107,0.14); color: #ff8a7a; border: 1px solid rgba(255,122,107,0.4); }
.badge-diff.diff-unknown  { background: rgba(136,136,136,0.12); color: #888;    border: 1px solid rgba(136,136,136,0.3); }

/* OS row */
.card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 12px;
  color: var(--text-muted);
}
.os-badge {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  font-weight: 500;
}
.os-icon { font-size: 13px; }
.card-ip {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: auto;
  font-family: var(--mono);
}

.card-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 6px 0 8px;
  display: -webkit-box;
  -webkit-line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
  position: relative;
}

/* Tags */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-bottom: 8px;
}
.tag {
  background: rgba(255,0,0,0.1);
  border: 1px solid rgba(255,77,77,0.3);
  border-radius: var(--r-xs);
  padding: 2px 7px;
  font-size: 12px;
  color: var(--red);
  font-weight: 500;
  cursor: default;
  letter-spacing: 0.2px;
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: inline-block;
  vertical-align: middle;
  line-height: 1.6;
}
.tag.cert {
  background: rgba(255,0,0,0.08);
  border-color: rgba(255,77,77,0.25);
  color: #ff8080;
}

/* Card actions */
.card-actions {
  display: flex;
  gap: 8px;
  /* auto: empuja los botones al pie para que las tarjetas de una
     misma fila los alineen aunque tengan distinto contenido */
  margin-top: auto;
  padding-top: 12px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 32px;
  padding: 6px 14px;
  border-radius: var(--r-xs);
  border: 1px solid;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: 0.5px;
}
/* Resolver = acción primaria (filled) */
.btn-resolve {
  background-color: rgba(180,0,0,0.85);
  border-color: var(--red);
  color: #fff;
  font-weight: 700;
}
.btn-resolve:hover {
  background-color: #ff0000;
  border-color: #ff0000;
  box-shadow: 0 0 16px rgba(255,0,0,0.5);
  transform: translateY(-1px);
}
.btn-resolve.done {
  background-color: rgba(0,208,132,0.18);
  border-color: rgba(0,208,132,0.55);
  color: var(--green);
  font-weight: 600;
}
.btn-resolve.done:hover {
  background-color: rgba(0,208,132,0.28);
  border-color: var(--green);
  box-shadow: 0 0 12px rgba(0,208,132,0.3);
  transform: translateY(-1px);
}
/* Writeup / Descargar = acciones secundarias */
.btn-writeup {
  background-color: transparent;
  border-color: var(--red-border);
  color: var(--text-muted);
}
.btn-writeup:hover {
  background-color: rgba(255,77,77,0.08);
  border-color: rgba(255,77,77,0.4);
  color: var(--text-dim);
  transform: translateY(-1px);
}
.btn-lab {
  background-color: transparent;
  border-color: var(--red-border);
  color: var(--text-muted);
}
.btn-lab:hover {
  background-color: rgba(255,77,77,0.08);
  border-color: rgba(255,77,77,0.4);
  color: var(--text-dim);
  transform: translateY(-1px);
}
.btn svg { width: 13px; height: 13px; flex: none; }

/* Divider */
.section-divider {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 4px 0 6px;
  font-weight: 600;
}

/* Empty state */
.empty-state {
  grid-column: 1/-1;
  text-align: center;
  padding: 60px 20px;
  color: var(--text-muted);
}
.empty-state-icon { margin-bottom: 16px; }
.empty-state-text { font-size: 16px; margin-bottom: 18px; }

/* Tab panel */
.tab-panel { max-width: var(--content-max); margin: 0 auto; }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: #000000; }
::-webkit-scrollbar-thumb { background: var(--red-border); border-radius: var(--r-xs); }
::-webkit-scrollbar-thumb:hover { background: var(--red-dim); }

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════ */
@media (min-width: 1440px) {
  .grid-container {
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 20px;
  }
}
/* Movil: el logo y las cifras comparten fila, las pestanas debajo */
@media (max-width: 900px) {
  .header {
    height: auto;
    gap: 8px;
    padding-block: 10px 0;
  }
  .logo { order: 1; }
  .header-stats { order: 2; }
  .tabs-bar { order: 3; flex-basis: 100%; height: 44px; }
  .tab-btn { padding: 0 12px; }
}
@media (max-width: 768px) {
  .tab-btn { min-height: 44px; }
  .grid-container { gap: 14px; }
  .controls-search-row { gap: 10px; }
  /* Objetivos tactiles */
  .btn, .btn-filter-toggle { min-height: 40px; }
  .search-input { min-height: 40px; padding-top: 10px; padding-bottom: 10px; }
  .chip { padding: 6px 12px; min-height: 32px; display: inline-flex; align-items: center; }
}
/* Los margenes laterales de la rejilla coinciden siempre con los de la
   cabecera y los controles (clamp(16px, 3vw, 32px)); solo cambia el vertical. */
@media (max-width: 640px) {
  .grid-container { grid-template-columns: 1fr; padding-top: 16px; padding-bottom: 24px; gap: 12px; }
  .card { padding: 14px; }
  .card-actions .btn { flex: 1 1 auto; }
  /* Con tres acciones: Resolver ocupa la fila y las otras dos se reparten la siguiente */
  .card-actions:has(> :nth-child(3)) .btn-resolve { flex-basis: 100%; }
  .filters { padding: 12px; }
  .filter-row { flex-direction: column; align-items: stretch; gap: 8px; }
  .filter-label { width: auto; }
  .filter-actions { justify-content: flex-start; }
}
/* Cifras compactas: un icono sustituye a la etiqueta (que sigue
   disponible para lectores de pantalla) para que quepan junto al logo. */
@media (max-width: 560px) {
  .stat-label {
    position: absolute;
    width: 1px; height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }
  .stat-icon { display: inline-flex; }
  .stat-item { padding: 4px 9px; gap: 4px; }
}
@media (max-width: 420px) {
  .logo { font-size: 12px; letter-spacing: 1px; }
  /* Sin iconos en las pestañas para que las tres quepan sin desplazar */
  .tab-btn { padding: 0 10px; gap: 6px; }
  .tab-btn > svg { display: none; }
}
/* Moviles muy estrechos (320-360px) */
@media (max-width: 360px) {
  .header, .controls-inner, .grid-container { padding-left: 12px; padding-right: 12px; }
  .logo { font-size: 11px; letter-spacing: 0.6px; }
  .tab-btn { padding: 0 8px; font-size: 12px; }
  .stat-item { padding: 3px 7px; }
}

/* ── Accessibility: respect reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ── Keyboard-only focus outlines ── */
.btn:focus-visible,
.tab-btn:focus-visible,
.chip:focus-visible,
.chip-clear:focus-visible,
.search-input:focus-visible,
.rm-card-header:focus-visible,
.rm-mark-btn:focus-visible,
.rm-resource:focus-visible,
#back-to-top:focus-visible,
.rm-cover:focus-visible,
.rm-footer-link:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 2px;
}

/* ── Safe area insets (iOS notch / Android nav bar) ── */
body {
  padding-left: env(safe-area-inset-left, 0);
  padding-right: env(safe-area-inset-right, 0);
  padding-bottom: env(safe-area-inset-bottom, 0);
}


/* ── ICONOS SVG ── */
/* Sustituyen a los emoji: heredan color y se dimensionan por contexto. */
.os-icon { display: inline-flex; }
.os-icon svg { width: 13px; height: 13px; display: block; }
.tab-btn svg { width: 15px; height: 15px; flex: none; }
.btn-filter-toggle svg { width: 13px; height: 13px; flex: none; }
.chip-clear { display: inline-flex; align-items: center; gap: 5px; }
.chip-clear svg { width: 12px; height: 12px; flex: none; }
.rm-resource-icon { display: inline-flex; }
.rm-resource-icon svg { width: 14px; height: 14px; display: block; }
.rm-header-icon { display: inline-flex; align-items: center; }
.rm-header-icon svg { width: 26px; height: 26px; display: block; }
.rm-footer-icon { display: inline-flex; align-items: center; }
.rm-footer-icon svg { width: 24px; height: 24px; display: block; }
.empty-state-icon { display: flex; justify-content: center; color: var(--text-muted); }
.empty-state-icon svg { width: 44px; height: 44px; }
#back-to-top svg { width: 18px; height: 18px; }

/* ── AVISO EMERGENTE ── */
#toast {
  position: fixed;
  bottom: calc(80px + env(safe-area-inset-bottom, 0px));
  left: 50%;
  width: max-content;
  max-width: calc(100% - 32px);
  text-align: center;
  background: var(--surface);
  border: 1px solid var(--red);
  border-radius: var(--r);
  padding: 12px 20px;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--red);
  z-index: 9999;
  transform: translate(-50%, 80px);
  opacity: 0;
  transition: transform 0.3s, opacity 0.3s;
  pointer-events: none;
  box-shadow: 0 0 20px rgba(255,0,0,0.3);
}
#toast.show {
  transform: translate(-50%, 0);
  opacity: 1;
}

/* ── BACK TO TOP ── */
#back-to-top {
  position: fixed;
  bottom: calc(24px + env(safe-area-inset-bottom, 0px));
  right: calc(20px + env(safe-area-inset-right, 0px));
  z-index: 500;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(180,0,0,0.85);
  border: 1px solid var(--red);
  color: #fff;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 12px rgba(255,0,0,0.3);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.25s;
  transform: translateY(8px);
}
#back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
#back-to-top:hover { background: var(--red); }
/* ============================================================
   ROADMAP eJPT — Interactive Vertical Timeline
   ============================================================ */
.rm-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: clamp(16px, 3vw, 32px) clamp(12px, 3vw, 24px) 60px;
  color: var(--text);
}
.rm-intro {
  text-align: center;
  padding: clamp(20px, 4vw, 32px) clamp(16px, 3vw, 28px);
  background: linear-gradient(180deg, rgba(20,4,4,0.9), rgba(8,2,2,0.75));
  border: 1px solid var(--red-border);
  border-radius: var(--r-lg);
  margin-bottom: 40px;
}
.rm-intro-title {
  font-size: clamp(20px, 4.5vw, 28px);
  font-weight: 800;
  color: var(--text);
  letter-spacing: 1px;
  margin-bottom: 6px;
}
.rm-intro-sub {
  font-size: clamp(12px, 2.5vw, 14px);
  color: var(--text-muted);
  margin-bottom: 18px;
}
.rm-intro-sub strong { color: var(--red); }
.rm-progress-block { max-width: 460px; margin: 0 auto; }
.rm-progress-track {
  width: 100%;
  height: 10px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,77,77,0.2);
  border-radius: var(--r-pill);
  overflow: hidden;
}
.rm-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--red-dim), var(--red));
  border-radius: var(--r-pill);
  transition: width 0.4s ease;
}
.rm-progress-label {
  margin-top: 10px;
  font-size: 12px;
  color: var(--text-dim);
  letter-spacing: 0.4px;
}

.rm-timeline {
  position: relative;
  padding-left: 56px;
}
.rm-line {
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 22px;
  width: 2px;
  background: linear-gradient(180deg, rgba(255,77,77,0.15), rgba(255,77,77,0.55) 20%, rgba(255,77,77,0.55) 80%, rgba(255,77,77,0.15));
  border-radius: var(--r-xs);
}
.rm-node {
  position: relative;
  margin-bottom: 22px;
}
.rm-node:last-child { margin-bottom: 0; }

.rm-phase-header {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 24px 0 20px -56px;
  padding: 0 4px;
  z-index: 2;
}
.rm-phase-header:first-child { margin-top: 4px; }
.rm-phase-line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,77,77,0.55), transparent);
}
.rm-phase-text {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 2.5px;
  color: var(--red);
  padding: 6px 14px;
  background: linear-gradient(180deg, #1a0303, #050505);
  border: 1px solid var(--red);
  border-radius: var(--r-pill);
  text-transform: uppercase;
  white-space: nowrap;
}
@media (max-width: 640px) {
  .rm-phase-header { margin-left: -44px; }
  .rm-phase-text { font-size: 10.5px; letter-spacing: 1.5px; padding: 5px 10px; }
}
.rm-dot {
  position: absolute;
  left: -56px;
  top: 10px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #1a0303, #050505);
  border: 2px solid var(--red);
  box-shadow: inset 0 0 8px rgba(255,77,77,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: var(--red);
  font-size: 15px;
  z-index: 1;
  transition: all 0.25s ease;
}
.rm-dot-check { display: none; }
.rm-dot-check svg { width: 18px; height: 18px; }
.rm-node.completed .rm-dot {
  background: linear-gradient(135deg, var(--red-dim), var(--red));
  color: #fff;
  box-shadow: 0 0 18px rgba(255,77,77,0.75), inset 0 0 8px rgba(0,0,0,0.3);
}
.rm-node.completed .rm-dot-num { display: none; }
.rm-node.completed .rm-dot-check { display: inline-flex; color: #fff; }

.rm-card {
  background: linear-gradient(180deg, rgba(14,4,4,0.95), rgba(6,2,2,0.9));
  border: 1px solid rgba(255,77,77,0.22);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}
.rm-card:hover {
  border-color: var(--card-border-hover);
  box-shadow: 0 0 20px rgba(255,77,77,0.18);
}
.rm-node.completed .rm-card {
  border-color: rgba(255,77,77,0.55);
  box-shadow: 0 0 16px rgba(255,77,77,0.22);
}
.rm-card-heading { font-size: inherit; font-weight: inherit; }
.rm-card-header {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 14px 18px;
  border: 0;
  border-radius: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
  user-select: none;
  background: linear-gradient(90deg, rgba(139,0,0,0.12), transparent);
}
.rm-header-icon {
  font-size: 26px;
  line-height: 1;
  flex-shrink: 0;
}
.rm-header-text { flex: 1; min-width: 0; }
.rm-header-title {
  display: block;
  font-size: clamp(14px, 3vw, 17px);
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.3px;
}
.rm-header-sub {
  display: block;
  font-size: clamp(11px, 2.4vw, 13px);
  color: var(--text-muted);
  margin-top: 2px;
}
.rm-header-chevron {
  color: var(--red);
  font-size: 18px;
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.rm-node.expanded .rm-header-chevron { transform: rotate(180deg); }

.rm-card-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 18px;
}
.rm-node.expanded .rm-card-body {
  max-height: 6000px;
  padding: 4px 18px 18px;
}
.rm-cover {
  display: block;
  position: relative;
  margin: 12px 0 16px;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid rgba(255,77,77,0.35);
  text-decoration: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  background: #0a0505;
  line-height: 0;
}
.rm-cover img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  max-height: 260px;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.rm-cover:hover {
  border-color: var(--red);
  box-shadow: 0 0 26px rgba(255,77,77,0.45);
  transform: translateY(-2px);
}
.rm-cover:hover img { transform: scale(1.04); }
.rm-cover-badge {
  position: absolute;
  bottom: 10px;
  right: 10px;
  padding: 6px 12px;
  background: linear-gradient(135deg, var(--red-dim), var(--red));
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.5px;
  border-radius: var(--r-pill);
  box-shadow: 0 4px 12px rgba(0,0,0,0.55);
  line-height: 1;
}

.rm-desc {
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.55;
  margin: 10px 0 14px;
  padding: 10px 12px;
  background: rgba(255,77,77,0.05);
  border-left: 3px solid var(--red);
  border-radius: var(--r-xs);
}
.rm-section { margin-bottom: 14px; }
.rm-section:last-of-type { margin-bottom: 16px; }
.rm-section-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--red);
  font-weight: 700;
  margin-bottom: 8px;
  padding-bottom: 4px;
  border-bottom: 1px dashed rgba(255,77,77,0.2);
}
.rm-objectives {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.rm-objectives li {
  position: relative;
  padding-left: 20px;
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.5;
}
.rm-objectives li::before {
  content: '▹';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--red);
  font-weight: 700;
}
.rm-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.rm-tool {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(255,77,77,0.08);
  border: 1px solid rgba(255,77,77,0.28);
  border-radius: var(--r-pill);
  font-size: 11px;
  color: var(--text);
  font-family: var(--mono);
  letter-spacing: 0.3px;
}
.rm-resources {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.rm-resource {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,77,77,0.15);
  border-radius: var(--r);
  color: var(--text-dim);
  text-decoration: none;
  font-size: 13px;
  transition: all 0.2s ease;
}
.rm-resource:hover {
  background: rgba(255,77,77,0.08);
  border-color: var(--red);
  color: var(--text);
  transform: translateX(4px);
}
.rm-resource-icon {
  color: var(--red);
  font-weight: 700;
  flex-shrink: 0;
}
.rm-mark-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  margin-top: 8px;
  padding: 10px 14px;
  background: transparent;
  border: 1px solid var(--red);
  border-radius: var(--r);
  color: var(--red);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: var(--sans);
}
.rm-mark-btn:hover {
  background: rgba(255,77,77,0.1);
  box-shadow: 0 0 12px rgba(255,77,77,0.3);
}
.rm-mark-btn.done {
  background: linear-gradient(135deg, var(--red-dim), var(--red));
  color: #fff;
  border-color: var(--red);
}
.rm-mark-btn.done:hover {
  background: linear-gradient(135deg, var(--red-dark), var(--red-dim));
}
.rm-footer {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 32px;
  padding: 16px 20px;
  background: rgba(255,77,77,0.05);
  border: 1px dashed rgba(255,77,77,0.35);
  border-radius: var(--r-lg);
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.5;
}
.rm-footer-icon {
  font-size: 24px;
  flex-shrink: 0;
}
.rm-footer strong { color: var(--red); }
.rm-footer-link { color: var(--red); text-decoration: underline; text-underline-offset: 2px; }
.rm-footer-link:hover { color: #ff8080; }
.rm-header-chevron svg { width: 18px; height: 18px; }
.rm-mark-btn svg { width: 14px; height: 14px; flex: none; }

@media (max-width: 640px) {
  .rm-timeline { padding-left: 44px; }
  .rm-line { left: 16px; }
  .rm-dot {
    left: -44px;
    width: 34px;
    height: 34px;
    font-size: 13px;
  }
  .rm-card-header { padding: 12px 14px; gap: 10px; }
  .rm-header-icon { font-size: 22px; }
  .rm-node.expanded .rm-card-body { padding: 4px 14px 14px; }
}
@media (prefers-reduced-motion: reduce) {
  .rm-card-body,
  .rm-header-chevron,
  .rm-progress-fill,
  .rm-dot,
  .rm-resource { transition: none; }
}

/* Pantallas tactiles: los desplazamientos de :hover se quedan
   "pegados" tras tocar, asi que solo se aplican con raton. */
@media (hover: none) {
  .card:hover,
  .btn:hover,
  .btn-resolve:hover,
  .btn-resolve.done:hover,
  .btn-writeup:hover,
  .btn-lab:hover,
  .rm-cover:hover,
  .rm-resource:hover { transform: none; }
  .rm-cover:hover img { transform: none; }
}