/* ==========================================================================
   SMR Hub — hoja de estilos
   Fase 1: esqueleto, navegación, tema y responsive
   ========================================================================== */

/* ==========================================================================
   SMR Hub — sistema de diseño (fase 5.6)
   Tokens centralizados. Todos los componentes consumen estas variables;
   no se repiten colores sueltos por el CSS.
   ========================================================================== */

/* ----- Tema ----- */

:root {
  color-scheme: light;

  /* --- Superficies --- */
  --bg: #f5f6f8;
  --surface: #ffffff;
  --surface-2: #f7f8fa;
  --surface-elevated: #ffffff;
  --surface-sunken: #f0f2f5;
  --overlay: rgba(15, 20, 28, 0.44);

  /* --- Bordes --- */
  --border: #e4e7ec;
  --border-strong: #d2d7de;

  /* --- Texto --- */
  --text: #10141a;
  --text-2: #5a6472;
  --text-3: #8b94a1;
  --text-inverse: #ffffff;

  /* --- Interacción --- */
  --hover: #eef0f4;
  --active: #e6eaf0;
  --focus-ring: rgba(37, 99, 235, 0.38);

  /* --- Acento --- */
  --accent: #1d4ed8;
  --accent-hover: #1a43bb;
  --accent-soft: rgba(29, 78, 216, 0.08);
  --accent-border: rgba(29, 78, 216, 0.24);
  --accent-contrast: #ffffff;

  /* --- Estados --- */
  --success: #0f7a4d;
  --success-soft: rgba(15, 122, 77, 0.09);
  --warning: #8a5800;
  --warning-soft: rgba(138, 88, 0, 0.1);
  --danger: #bb2d20;
  --danger-soft: rgba(187, 45, 32, 0.09);
  --ok: #0f7a4d;
  --bad: #bb2d20;
  --warn: #8a5800;

  /* --- Radios --- */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 18px;
  --radius-full: 999px;

  /* --- Sombras: muy ligeras --- */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 1px 3px rgba(15, 23, 42, 0.07), 0 6px 16px -6px rgba(15, 23, 42, 0.09);
  --shadow-lg: 0 2px 6px rgba(15, 23, 42, 0.07), 0 16px 40px -12px rgba(15, 23, 42, 0.16);
  --shadow-pop: 0 8px 24px rgba(15, 23, 42, 0.14);

  /* --- Espaciado --- */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --sp-10: 40px;

  /* --- Tipografía --- */
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-mono: ui-monospace, 'Cascadia Code', Consolas, monospace;
  --fs-display: 2rem;
  --fs-title: 1.3125rem;
  --fs-section: 1rem;
  --fs-body: 0.9375rem;
  --fs-sm: 0.8125rem;
  --fs-meta: 0.75rem;
  --tracking-tight: -0.018em;

  /* --- Movimiento --- */
  --dur-fast: 120ms;
  --dur-base: 180ms;
  --ease: cubic-bezier(0.2, 0, 0.2, 1);

  /* --- Estructura --- */
  --radius: var(--radius-md);
  --sidebar-w: 252px;
}

html[data-theme='dark'] {
  color-scheme: dark;

  --bg: #0d0f12;
  --surface: #14171b;
  --surface-2: #191d22;
  --surface-elevated: #1b1f25;
  --surface-sunken: #101317;
  --overlay: rgba(0, 0, 0, 0.62);

  --border: #262b32;
  --border-strong: #353c45;

  --text: #edf0f4;
  --text-2: #9aa4b1;
  --text-3: #6e7883;
  --text-inverse: #0b0f14;

  --hover: #1e232a;
  --active: #262c34;
  --focus-ring: rgba(126, 166, 255, 0.45);

  --accent: #7ea6ff;
  --accent-hover: #a0bcff;
  --accent-soft: rgba(126, 166, 255, 0.12);
  --accent-border: rgba(126, 166, 255, 0.3);
  --accent-contrast: #0b1220;

  --success: #45c98a;
  --success-soft: rgba(69, 201, 138, 0.13);
  --warning: #e0a83c;
  --warning-soft: rgba(224, 168, 60, 0.13);
  --danger: #f2726a;
  --danger-soft: rgba(242, 114, 106, 0.13);
  --ok: #45c98a;
  --bad: #f2726a;
  --warn: #e0a83c;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 1px 3px rgba(0, 0, 0, 0.45), 0 6px 16px -6px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 2px 6px rgba(0, 0, 0, 0.5), 0 16px 40px -12px rgba(0, 0, 0, 0.7);
  --shadow-pop: 0 8px 24px rgba(0, 0, 0, 0.5);
}

/* Tamaño de texto configurable */
html { font-size: 16px; }
html[data-text-size='sm'] { font-size: 15px; }
html[data-text-size='lg'] { font-size: 17px; }
html[data-text-size='xl'] { font-size: 18px; }

/* Animaciones desactivables */
html[data-animations='off'] *,
html[data-animations='off'] *::before,
html[data-animations='off'] *::after {
  transition: none !important;
  animation: none !important;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
}

/* ----- Base ----- */

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body { background: var(--bg); }

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
h1, h2, h3, p, ul { margin: 0; }
ul { padding: 0; list-style: none; }
a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.icon {
  display: block;
  flex: none;
}

/* Scrollbar discreta */
* { scrollbar-width: thin; scrollbar-color: var(--border) transparent; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 6px;
  border: 3px solid transparent;
  background-clip: content-box;
}
::-webkit-scrollbar-track { background: transparent; }

/* ----- Estructura ----- */

.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  min-height: 100vh;
}

.main {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* ----- Barra lateral ----- */

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border-right: 1px solid var(--border);
}

.sidebar-brand {
  padding: 18px 20px 14px;
  border-bottom: 1px solid var(--border);
}

.brand-link {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 12px 10px;
}

.sidebar-footer {
  border-top: 1px solid var(--border);
  padding: 10px;
}

.nav-group {
  padding: 0 10px;
  margin-bottom: 6px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-2);
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px;
  margin-bottom: 1px;
  border-radius: 6px;
  font-size: 14px;
  text-decoration: none;
  color: var(--text-2);
}

.nav-link span {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-link .icon { opacity: 0.85; }
.nav-link:hover { background: var(--hover); color: var(--text); }

.nav-link.active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 500;
}

/* ----- Cabecera ----- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 9px 32px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.topbar-title {
  min-width: 0;
  margin-right: auto;
}

.topbar-title h1 {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.topbar-title p {
  margin-top: 1px;
  font-size: 12.5px;
  color: var(--text-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

/* ----- Controles ----- */

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--text-2);
}

.icon-btn:hover { background: var(--hover); color: var(--text); }

.btn {
  padding: 7px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  font-size: 13.5px;
  font-weight: 500;
}

.btn:hover { background: var(--hover); }

.input {
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  color: var(--text);
  font-size: 13.5px;
}

.input::placeholder { color: var(--text-2); }

/* ----- Buscador ----- */

.search {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 10px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  color: var(--text-2);
  pointer-events: none;
}

.search-input {
  width: 260px;
  padding: 7px 10px 7px 32px;
}

.search-results {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  width: 320px;
  max-height: 340px;
  overflow-y: auto;
  padding: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-pop);
  z-index: 60;
}

.search-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 8px 10px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  text-align: left;
}

.search-item:hover { background: var(--hover); }

.search-item-title { font-size: 13.5px; }
.search-item-meta { flex: none; font-size: 11.5px; color: var(--text-2); }

.search-empty {
  padding: 10px;
  font-size: 13px;
  color: var(--text-2);
}

/* ----- Contenido ----- */

.content {
  flex: 1;
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 28px 32px 64px;
}

/* Inicio */

.hero {
  padding: 8px 0 24px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--border);
}

.hero h2 {
  margin-bottom: 6px;
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 15px;
  color: var(--text-2);
}

.section-label {
  margin-bottom: 12px;
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-2);
}

.link-list {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
}

.link-list li + li { border-top: 1px solid var(--border); }

.link-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 16px;
  text-decoration: none;
}

.link-row:hover { background: var(--hover); }
.link-row > .icon:first-child { color: var(--text-2); }
.link-row > svg:last-child { margin-left: auto; opacity: 0.55; }

.link-row-text { display: block; min-width: 0; }
.link-row-title { display: block; font-size: 14px; font-weight: 500; }
.link-row-desc { display: block; margin-top: 1px; font-size: 13px; color: var(--text-2); }

/* Estado vacío */

.empty {
  max-width: 560px;
  margin: 40px auto;
  padding: 40px 24px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  text-align: center;
  color: var(--text-2);
}

.empty .icon { margin: 0 auto 10px; opacity: 0.7; }
.empty-title { font-size: 14px; font-weight: 500; color: var(--text); }
.empty-text { margin-top: 4px; font-size: 13.5px; }

/* Configuración */

.settings-group {
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.settings-group + .settings-group { margin-top: 16px; }

.option-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 0;
}

.option-row + .option-row { border-top: 1px solid var(--border); }
.option-label { font-size: 14px; font-weight: 500; }
.option-hint { margin-top: 2px; font-size: 12.5px; color: var(--text-2); }

.segmented {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.segmented button {
  padding: 6px 14px;
  border: 0;
  background: var(--surface);
  font-size: 13px;
  color: var(--text-2);
}

.segmented button + button { border-left: 1px solid var(--border); }
.segmented button.active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 500;
}

.switch {
  appearance: none;
  position: relative;
  width: 34px;
  height: 20px;
  border: 0;
  border-radius: 999px;
  background: var(--border);
  transition: background 0.15s ease;
}

.switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.25);
  transition: transform 0.15s ease;
}

.switch:checked { background: var(--accent); }
.switch:checked::after { transform: translateX(14px); }

/* ----- Accesibilidad ----- */

.skip-link {
  position: absolute;
  left: -9999px;
  top: 12px;
  z-index: 100;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  text-decoration: none;
  font-size: 13px;
}

.skip-link:focus { left: 12px; }

/* ----- Responsive ----- */

.menu-btn { display: none; }

@media (max-width: 1023.98px) {
  .app { grid-template-columns: 1fr; }

  .sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 50;
    width: 272px;
    height: 100dvh;
    transform: translateX(-102%);
    transition: transform 0.18s ease;
  }

  .sidebar.open {
    transform: none;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.18);
  }

  .scrim {
    position: fixed;
    inset: 0;
    z-index: 40;
    background: rgba(0, 0, 0, 0.45);
    opacity: 0;
    transition: opacity 0.18s ease;
  }

  .scrim.show { opacity: 1; }

  .menu-btn { display: inline-flex; }

  .topbar {
    flex-wrap: wrap;
    row-gap: 8px;
    padding: 10px 16px;
  }

  .topbar-actions { width: 100%; margin-left: 0; }
  .search { flex: 1; display: flex; }
  .search-input { width: 100%; }
  .search-results { left: 0; right: 0; width: auto; }

  .content { padding: 20px 16px 48px; }
}

@media (max-width: 480px) {
  .hero h2 { font-size: 22px; }
  .option-row { flex-wrap: wrap; }
}

/* ==========================================================================
   Fase 2: inicio, recursos, glosario y modal
   ========================================================================== */

.home-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 28px;
}

.link-list.compact .link-row { padding: 10px 16px; }

.link-row-meta {
  flex: none;
  margin-left: auto;
  font-size: 12px;
  color: var(--text-2);
}

.link-row-meta + .icon { margin-left: 0; }

/* Filtros */

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.page-search { flex: 1 1 220px; max-width: 380px; }

.chip-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.chip {
  padding: 4px 11px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
  font-size: 12.5px;
  color: var(--text-2);
}

.chip:hover { background: var(--hover); color: var(--text); }

.chip.active {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
  font-weight: 500;
}

.count-note {
  margin: 10px 2px 8px;
  font-size: 12px;
  color: var(--text-2);
}

/* Filas (recursos) */

.row-list {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
}

.row-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
}

.row-item + .row-item { border-top: 1px solid var(--border); }

.row-main { min-width: 0; flex: 1; }

.row-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.row-title { font-size: 14px; font-weight: 500; margin-right: 2px; }

.row-desc {
  margin-top: 3px;
  font-size: 13px;
  color: var(--text-2);
}

.row-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: none;
}

.badge {
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 11px;
  color: var(--text-2);
  white-space: nowrap;
}

.btn-sm { padding: 4px 10px; font-size: 12.5px; }

.fav-btn { width: 28px; height: 28px; }
.fav-btn.active { color: var(--accent); }

.row-list .empty { border: none; margin: 28px auto; }

/* Glosario */

.gloss-item { padding: 13px 16px; }
.gloss-item + .gloss-item { border-top: 1px solid var(--border); }

.gloss-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.gloss-term { font-size: 14px; font-weight: 600; }

.gloss-def {
  margin-top: 4px;
  font-size: 13.5px;
  color: var(--text-2);
}

/* Modal */

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(0, 0, 0, 0.45);
  animation: modal-fade 0.15s ease;
}

.modal {
  width: 100%;
  max-width: 560px;
  max-height: min(720px, 85vh);
  overflow-y: auto;
  padding: 20px 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-pop);
  animation: modal-in 0.15s ease;
}

@keyframes modal-fade { from { opacity: 0; } }
@keyframes modal-in { from { opacity: 0; transform: translateY(6px); } }

.modal-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.modal-title { font-size: 16px; font-weight: 600; letter-spacing: -0.01em; }

.modal-meta { display: flex; gap: 6px; margin-top: 6px; }

.modal-desc { margin-top: 12px; font-size: 14px; }

.modal-sub {
  margin-top: 16px;
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-2);
}

.modal-list {
  margin-top: 10px;
  padding-left: 18px;
  list-style: disc;
  display: grid;
  gap: 6px;
  font-size: 13.5px;
}

.modal-foot {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
}

/* Responsive filas y rejilla de inicio */

@media (max-width: 900px) {
  .home-grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .row-item { flex-direction: column; align-items: stretch; }
  .row-actions { justify-content: flex-end; margin-top: 4px; }
}

/* ==========================================================================
   Fase 3: herramientas, tests y secciones temáticas
   ========================================================================== */

/* Alias de acierto/error: ahora derivan del sistema centralizado
   (fase 5.6) para no repetir colores sueltos. */

:root {
  --ok: var(--success);
  --ok-soft: var(--success-soft);
  --bad: var(--danger);
  --bad-soft: var(--danger-soft);
  --muted: var(--text-3);
}

.mono {
  font-family: ui-monospace, 'Cascadia Code', 'SF Mono', Consolas, Menlo, monospace;
}

/* ----- Herramientas ----- */

.tool {
  margin-bottom: 24px;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.tool-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
}

.tool-title .icon { color: var(--accent); }

.tool-desc {
  margin-top: 4px;
  font-size: 13px;
  color: var(--text-2);
}

.field-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 12px;
  margin-top: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.field-label {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-2);
}

.input.invalid { border-color: var(--bad); }

.form-error {
  margin-top: 10px;
  font-size: 13px;
  color: var(--bad);
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.kv {
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.kv-key {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-2);
}

.kv-value {
  display: block;
  margin-top: 2px;
  font-size: 13.5px;
  font-weight: 500;
  overflow-wrap: anywhere;
}

.kv-hl {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.kv-hl .kv-value { color: var(--accent); }

/* Generador de contraseñas */

.pass-row {
  display: flex;
  gap: 8px;
  margin-top: 14px;
}

.pass-row .input { flex: 1; min-width: 0; }

.check-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 12px;
}

.check {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 13.5px;
}

.check input { accent-color: var(--accent); }

.range-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
}

.range-row input[type='range'] { flex: 1; accent-color: var(--accent); }

.range-value {
  min-width: 30px;
  text-align: right;
  font-size: 13.5px;
  font-weight: 500;
}

.strength { margin-top: 10px; font-size: 13px; }
.strength.ok { color: var(--ok); }
.strength.mid { color: #b45309; }
.strength.bad { color: var(--bad); }

/* Tabla de puertos */

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.port-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

.port-table th,
.port-table td {
  padding: 9px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.port-table thead th {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-2);
}

.port-table tbody tr:last-child td { border-bottom: none; }
.port-table tbody tr:hover { background: var(--hover); }

.port-service { font-weight: 500; }
.port-desc { color: var(--text-2); }
.ports-empty { color: var(--text-2); }

/* Referencia rápida (Redes y Sistemas) */

.quick-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 12px;
}

.quick-card {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
}

.quick-key {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.quick-val {
  margin-top: 4px;
  font-size: 13px;
}

/* ----- Tests ----- */

.quiz { max-width: 680px; }

.quiz-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.quiz-counter { font-size: 12.5px; color: var(--text-2); }
.quiz-score { margin-left: auto; font-size: 12.5px; color: var(--text-2); }

.quiz-progress {
  height: 6px;
  border-radius: 999px;
  background: var(--border);
  overflow: hidden;
}

.quiz-progress-fill {
  height: 100%;
  border-radius: 999px;
  background: var(--accent);
  transition: width 0.2s ease;
}

.quiz-q {
  margin-top: 18px;
  font-size: 16px;
  font-weight: 600;
}

.quiz-options {
  display: grid;
  gap: 8px;
  margin-top: 14px;
}

.quiz-option {
  padding: 11px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  font-size: 14px;
  text-align: left;
}

.quiz-option:hover:not(:disabled) { background: var(--hover); }
.quiz-option:disabled { cursor: default; opacity: 0.75; }

.opt-letter {
  color: var(--text-2);
  font-weight: 600;
  margin-right: 4px;
}

.quiz-option.correct {
  border-color: var(--ok);
  background: var(--ok-soft);
  color: var(--ok);
  font-weight: 500;
  opacity: 1;
}

.quiz-option.wrong {
  border-color: var(--bad);
  background: var(--bad-soft);
  color: var(--bad);
  font-weight: 500;
  opacity: 1;
}

.quiz-explain {
  margin-top: 12px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  font-size: 13.5px;
}

.quiz-explain.ok { border-left-color: var(--ok); }
.quiz-explain.bad { border-left-color: var(--bad); }

.quiz-actions {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.score-big {
  margin-top: 4px;
  font-size: 34px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.quiz-msg {
  margin-top: 6px;
  font-size: 14px;
  color: var(--text-2);
}

.review-title { margin-top: 28px; }

.review-list {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
}

.review-list li { padding: 13px 16px; }
.review-list li + li { border-top: 1px solid var(--border); }
.review-list li.ko { box-shadow: inset 3px 0 0 var(--bad); }
.review-list li.ok { box-shadow: inset 3px 0 0 var(--ok); }

.review-q {
  font-size: 13.5px;
  font-weight: 500;
}

.review-a {
  margin-top: 3px;
  font-size: 12.5px;
  color: var(--text-2);
}

.review-a .ok-text { color: var(--ok); font-weight: 500; }
.review-a .ko-text { color: var(--bad); font-weight: 500; }

.review-ex {
  margin-top: 4px;
  font-size: 12.5px;
  color: var(--text-2);
}