/* =========================================================================
 * estilo.css — Visualizador de algoritmos de ordenamiento
 * Estética basada en /plantilla: fondo pastel degradado, tarjetas blancas
 * redondeadas, números monoespaciados, código con línea activa resaltada.
 *
 * Variables que fija el motor (engine.js):
 *   --c-a --c-b --c-ok --c-card --c-text --c-accent   (tema)
 *   --sv-size --sv-gap --sv-radius --sv-align         (apariencia)
 * ========================================================================= */

:root {
  --font-ui: "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", Consolas, Menlo, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-ui);
  color: #1e293b;
  background:
    radial-gradient(1000px 600px at 0% 0%, #d9f3e2 0%, transparent 55%),
    radial-gradient(900px 700px at 100% 30%, #fbdde6 0%, transparent 55%),
    radial-gradient(800px 600px at 50% 100%, #dee3fb 0%, transparent 60%),
    #eef0f6;
  min-height: 100vh;
}

/* fondo transparente para embeber como elemento */
.sv-page-transparent, .sv-page-transparent body { background: none !important; }
.sv-root.sv-transparent { background: none; }

/* ============================ visualizador ============================ */
.sv-root {
  --c-a: #e5484d;
  --c-b: #3b82f6;
  --c-ok: #22c55e;
  --c-card: #ffffff;
  --c-text: #1e293b;
  --c-accent: #6366f1;
  --sv-size: 64px;
  --sv-gap: 10px;
  --sv-radius: 16px;
  --sv-align: center;
  outline: none;
}

.sv-wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 18px 14px 30px;
}

/* --- diseño compacto: código junto a la animación --- */
.sv-wide .sv-wrap {
  max-width: 1240px;
  display: grid;
  grid-template-columns: minmax(0, 58fr) minmax(0, 42fr);
  gap: 0 18px;
  align-items: start;
}
.sv-wide .sv-topbadge, .sv-wide .sv-header, .sv-wide .sv-footer { grid-column: 1 / -1; }
.sv-wide .sv-preview { grid-column: 1; margin-bottom: 0; }
.sv-wide .sv-code { grid-column: 2; position: sticky; top: 12px; margin-bottom: 0; }
.sv-wide .sv-footer { margin-top: 16px; }

/* la píldora vive DENTRO de un contenedor de ancho completo: así el badge
   no se deforma cuando el wrap pasa a flex/absoluto en modo ventanas */
.sv-topbadge { display: flex; justify-content: center; margin: 0 0 14px; }
.sv-tb-pill {
  background: rgba(255, 255, 255, .85);
  border-radius: 999px;
  padding: 7px 18px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.5px;
  box-shadow: 0 4px 14px rgba(30, 41, 59, .07);
  white-space: nowrap;
}
.sv-tb-a { color: var(--c-b); }
.sv-tb-dot { margin: 0 8px; color: #94a3b8; }
.sv-tb-b { color: var(--c-a); }

.sv-card {
  background: linear-gradient(140deg, rgba(233, 250, 239, .9), rgba(255, 255, 255, .92) 45%, rgba(252, 238, 243, .85));
  border-radius: 22px;
  box-shadow: 0 12px 32px rgba(30, 41, 59, .09);
  padding: 18px 20px;
  margin-bottom: 16px;
}

/* ------------------------------ cabecera ----------------------------- */
.sv-header { text-align: center; padding: 16px 20px 18px; }
.sv-title { margin: 2px 0 8px; font-size: clamp(20px, 3.4vw, 27px); letter-spacing: -.4px; }
.sv-desc { margin: 0 auto 10px; max-width: 62ch; color: #475569; font-size: 13px; line-height: 1.5; }
.sv-arrays {
  font-family: var(--font-mono);
  font-size: clamp(11px, 2.2vw, 13.5px);
  display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 8px;
  margin-bottom: 10px;
}
.sv-arr-in { color: #334155; }
.sv-arr-arrow { color: #94a3b8; }
.sv-arr-out { color: #16a34a; font-weight: 600; }
.sv-badges { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; }
.sv-badge {
  font-family: var(--font-mono); font-size: 13px; font-weight: 600;
  background: #fff; border-radius: 999px; padding: 6px 15px;
  box-shadow: 0 3px 10px rgba(30, 41, 59, .07);
  display: inline-flex; align-items: center; gap: 7px;
}
.sv-badge small { font-family: var(--font-ui); font-size: 9px; letter-spacing: 1.3px; color: #64748b; font-weight: 700; }
.sv-badge-time { color: var(--c-b); border: 1.5px solid color-mix(in srgb, var(--c-b) 35%, white); }
.sv-badge-space { color: #16a34a; border: 1.5px solid #bbe7c8; }
.sv-badge-stable { color: var(--c-accent); border: 1.5px solid #d5d3f7; }

/* --------------------------- vista previa ---------------------------- */
.sv-prev-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; }
.sv-live { font-size: 10px; font-weight: 700; letter-spacing: 2px; color: #64748b; display: inline-flex; align-items: center; gap: 7px; }
.sv-live-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--c-accent); display: inline-block; animation: sv-blink 1.6s infinite; }
@keyframes sv-blink { 50% { opacity: .35; } }
.sv-step { font-size: 11px; font-weight: 700; letter-spacing: 2px; color: #64748b; font-family: var(--font-mono); }

/* chip de mensaje — el color cambia según la acción del paso */
.sv-msg-wrap { display: flex; justify-content: center; min-height: 34px; margin-bottom: 6px; }
.sv-msg {
  font-family: var(--font-mono); font-size: 13px; font-weight: 600;
  background: #e9ecf2; color: #334155;
  border-radius: 11px; padding: 7px 16px;
  max-width: 100%; text-align: center;
  transition: background .3s, color .3s, box-shadow .3s;
}
.sv-k-idle    { background: #e9ecf2; color: #334155; }
.sv-k-select  { background: #fdeecd; color: #92600a; }
.sv-k-compare { background: color-mix(in srgb, var(--c-b) 15%, white); color: color-mix(in srgb, var(--c-b) 78%, black); }
.sv-k-swap    { background: color-mix(in srgb, var(--c-a) 14%, white); color: color-mix(in srgb, var(--c-a) 78%, black); }
.sv-k-move    { background: #fde8d7; color: #9a4a0b; }
.sv-k-write   { background: color-mix(in srgb, var(--c-ok) 16%, white); color: color-mix(in srgb, var(--c-ok) 60%, black); }
.sv-k-fixed   { background: #d5f3ec; color: #0c6e5d; }
.sv-k-divide  { background: #ece6fb; color: #5b3bbd; }
.sv-k-merge   { background: #e4e3fc; color: #4438b8; }
.sv-k-done    {
  background: color-mix(in srgb, var(--c-ok) 85%, black); color: #fff;
  box-shadow: 0 4px 14px color-mix(in srgb, var(--c-ok) 45%, transparent);
}

/* escenario */
.sv-stage {
  position: relative;
  display: flex; align-items: center;
  justify-content: var(--sv-align);
  gap: var(--sv-gap);
  padding: 2px 0;
}
.sv-slot { display: flex; flex-direction: column; align-items: center; width: var(--sv-size); flex: none; }

.sv-ptr { height: 32px; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; }
.sv-ptr-bot { justify-content: flex-start; }
.sv-ptr-badge {
  font-family: var(--font-mono); font-size: 11px; font-weight: 700; color: #fff;
  border-radius: 7px; padding: 2px 7px; line-height: 1.25;
}
.sv-ptr-a { background: var(--c-a); box-shadow: 0 3px 8px color-mix(in srgb, var(--c-a) 45%, transparent); }
.sv-ptr-b { background: var(--c-b); box-shadow: 0 3px 8px color-mix(in srgb, var(--c-b) 45%, transparent); }
.sv-ptr-line { width: 2px; height: 8px; }
.sv-ptr-line-a { background: var(--c-a); }
.sv-ptr-line-b { background: var(--c-b); }

/* elemento — forma tarjeta (por defecto) */
.sv-el {
  width: 100%;
  height: calc(var(--sv-size) * 1.08);
  display: flex; align-items: center; justify-content: center;
  background: var(--c-card); color: var(--c-text);
  border: 2px solid transparent;
  border-radius: var(--sv-radius);
  box-shadow: 0 6px 16px rgba(30, 41, 59, .09);
  font-family: var(--font-mono); font-weight: 700;
  font-size: calc(var(--sv-size) * .42);
  transition: background .2s, border-color .2s, opacity .2s, color .2s;
  will-change: transform;
}

/* forma barra */
.sv-shape-bar { align-items: flex-end; }
.sv-shape-bar .sv-slot { justify-content: flex-end; }
.sv-shape-bar .sv-el {
  height: auto; border-radius: 8px 8px 4px 4px;
  align-items: flex-start; padding-top: 3px;
  background: linear-gradient(180deg, color-mix(in srgb, var(--c-accent) 22%, white), var(--c-card));
  font-size: calc(var(--sv-size) * .3);
}
.sv-shape-bar .sv-val { pointer-events: none; }

/* forma círculo */
.sv-shape-circle .sv-el { height: var(--sv-size); border-radius: 50%; }

/* estados */
.sv-cmp-a { border-color: var(--c-a) !important; box-shadow: 0 0 0 4px color-mix(in srgb, var(--c-a) 18%, transparent), 0 6px 16px rgba(30,41,59,.09); }
.sv-cmp-b { border-color: var(--c-b) !important; box-shadow: 0 0 0 4px color-mix(in srgb, var(--c-b) 18%, transparent), 0 6px 16px rgba(30,41,59,.09); }
.sv-key   { border-color: #f59e0b !important; background: #fef6e7 !important; }
.sv-ok    { background: var(--c-ok) !important; color: #fff !important; }
.sv-write { background: var(--c-ok) !important; color: #fff !important; animation: sv-pop .35s; }
.sv-dim   { opacity: .38; }
.sv-under-l { box-shadow: 0 5px 0 -1px color-mix(in srgb, var(--c-ok) 75%, white), 0 6px 16px rgba(30,41,59,.09); }
.sv-under-r { box-shadow: 0 5px 0 -1px color-mix(in srgb, var(--c-b) 65%, white), 0 6px 16px rgba(30,41,59,.09); }
@keyframes sv-pop { 40% { transform: scale(1.08); } }

/* hueco: de aquí "se levantó" la key (inserción) */
.sv-hole {
  background: rgba(148, 163, 184, .12) !important;
  border: 2px dashed #cbd5e1 !important;
  box-shadow: none !important;
  color: transparent !important;
}

/* tarjeta flotante con la key (se desliza con transición de `left`) */
.sv-float {
  position: absolute; top: 0; z-index: 7;
  width: var(--sv-size);
  height: calc(var(--sv-size) * 0.82);
  display: flex; align-items: center; justify-content: center;
  background: #fef6e7; color: #92600a;
  border: 2px solid #f59e0b;
  border-radius: var(--sv-radius);
  box-shadow: 0 10px 22px rgba(146, 96, 10, .25);
  font-family: var(--font-mono); font-weight: 700;
  font-size: calc(var(--sv-size) * .36);
  transition: left .3s ease;
  pointer-events: none;
}

.sv-idx { margin-top: 6px; font-family: var(--font-mono); font-size: 11px; color: #94a3b8; }

/* buffer de mezcla */
.sv-buffer-wrap { min-height: 0; text-align: center; }
.sv-buffer-label { font-size: 9px; font-weight: 700; letter-spacing: 2px; color: #94a3b8; margin: 4px 0 6px; }
.sv-buffer {
  display: inline-flex; gap: 5px; padding: 6px;
  border: 2px dashed #cbd5e1; border-radius: 12px; min-height: 44px;
}
.sv-buf-cell {
  width: 32px; height: 32px; border-radius: 8px; background: #eef1f6;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-weight: 700; font-size: 14px;
}
.sv-buf-full { background: var(--c-ok); color: #fff; animation: sv-pop .3s; }

/* estadísticas */
.sv-stats { display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; margin-top: 10px; }
.sv-stat {
  background: rgba(255, 255, 255, .8); border-radius: 999px; padding: 5px 12px;
  font-family: var(--font-mono); font-size: 13px; font-weight: 700; color: #334155;
  display: inline-flex; align-items: center; gap: 7px;
  box-shadow: 0 2px 8px rgba(30, 41, 59, .06);
}
.sv-stat small { font-family: var(--font-ui); font-size: 8.5px; letter-spacing: 1.4px; color: #94a3b8; }

/* controles */
.sv-controls { margin-top: 12px; border-top: 1px solid rgba(148, 163, 184, .25); padding-top: 10px; }
.sv-scrub { width: 100%; accent-color: var(--c-accent); cursor: pointer; margin-bottom: 8px; }
.sv-ctl-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.sv-btns { display: flex; gap: 5px; }
.sv-btn {
  width: 38px; height: 38px; border-radius: 11px; border: none; cursor: pointer;
  background: #fff; color: #334155;
  display: inline-flex; align-items: center; justify-content: center;
  box-shadow: 0 3px 10px rgba(30, 41, 59, .08);
  transition: transform .12s, background .15s;
}
.sv-btn svg { width: 16px; height: 16px; }
.sv-btn:hover { transform: translateY(-1px); background: #f1f5f9; }
.sv-btn-play { background: var(--c-accent); color: #fff; width: 48px; }
.sv-btn-play:hover { background: color-mix(in srgb, var(--c-accent) 85%, black); }
.sv-btn-play svg { width: 18px; height: 18px; }
.sv-ctl-label { font-size: 8.5px; font-weight: 700; letter-spacing: 1.4px; color: #94a3b8; }
.sv-speed { display: flex; align-items: center; gap: 7px; }
.sv-speed-range { width: 84px; accent-color: var(--c-accent); cursor: pointer; }
.sv-speed-label { font-family: var(--font-mono); font-size: 12.5px; font-weight: 700; color: var(--c-accent); min-width: 32px; }
.sv-order { display: flex; align-items: center; gap: 5px; flex-wrap: wrap; }
.sv-obtn {
  border: 1.5px solid #dbe1ea; background: #fff; border-radius: 999px;
  padding: 6px 11px; font-size: 11.5px; font-weight: 600; color: #475569; cursor: pointer;
  display: inline-flex; align-items: center; gap: 6px;
  transition: all .15s;
}
.sv-obtn svg { width: 13px; height: 13px; }
.sv-obtn:hover { border-color: var(--c-accent); }
.sv-obtn.on { background: var(--c-accent); border-color: var(--c-accent); color: #fff; }

/* ------------------------------ código ------------------------------- */
.sv-code { padding: 16px 18px; }
.sv-code-head { display: flex; align-items: center; gap: 11px; margin-bottom: 10px; }
.sv-dots { display: inline-flex; gap: 5px; }
.sv-dots i { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.sv-dots i:nth-child(1) { background: #f16a5d; }
.sv-dots i:nth-child(2) { background: #f5bd4f; }
.sv-dots i:nth-child(3) { background: #58c55c; }
.sv-filename { font-family: var(--font-mono); font-size: 12px; color: #64748b; flex: 1; }
.sv-lang {
  font-family: var(--font-mono); font-size: 10px; font-weight: 700;
  background: color-mix(in srgb, var(--c-b) 14%, white); color: var(--c-b);
  border-radius: 6px; padding: 3px 7px;
}
.sv-code-body { font-family: var(--font-mono); font-size: 12.5px; line-height: 1.45; overflow-x: auto; }
.sv-cl { display: flex; gap: 12px; padding: 2px 7px; border-radius: 7px; border-left: 3px solid transparent; white-space: pre; transition: background .2s; }
.sv-cl.on { background: color-mix(in srgb, var(--c-ok) 13%, white); border-left-color: var(--c-ok); }
.sv-ln { color: #b0b9c6; min-width: 2ch; text-align: right; user-select: none; }
.sv-cl code { color: #334155; }
.tok-kw { color: #7c3aed; font-weight: 600; }
.tok-num { color: #ea580c; }
.tok-str { color: #16a34a; }
.tok-fn { color: #2563eb; font-weight: 600; }
.tok-com { color: #94a3b8; font-style: italic; }

.sv-footer { text-align: center; font-size: 11px; color: #94a3b8; letter-spacing: 1px; }

/* ================= modo ventanas (mover / redimensionar) ============== */
/* fluido con tamaños personalizados: las burbujas fluyen y se autoajustan */
.sv-wrap.sv-flowcustom { display: flex !important; flex-wrap: wrap; gap: 14px; justify-content: center; align-items: flex-start; }
.sv-flowcustom .sv-topbadge, .sv-flowcustom .sv-footer { flex-basis: 100%; }
.sv-flowcustom .sv-card.sv-win { margin-bottom: 0; }

/* libre: cada burbuja queda estática donde se dejó */
.sv-wrap.sv-free { display: block !important; position: relative; }
.sv-free .sv-card.sv-win { position: absolute; margin: 0; z-index: 3; }
.sv-free .sv-footer { position: absolute; left: 0; right: 0; bottom: 8px; }

/* burbuja con tamaño fijado por el usuario */
.sv-card.sv-sized { overflow: auto; }

/* modo edición: contorno y asas */
.sv-editing .sv-card.sv-win { position: relative; outline: 1.5px dashed rgba(99, 102, 241, .55); outline-offset: 2px; }

/* texto editable en el sitio (título y descripción) */
.sv-editing .sv-title[contenteditable="true"],
.sv-editing .sv-desc[contenteditable="true"] {
  cursor: text;
  border-radius: 8px;
  transition: box-shadow .15s, background .15s;
}
.sv-editing .sv-title[contenteditable="true"]:hover,
.sv-editing .sv-desc[contenteditable="true"]:hover {
  background: rgba(99, 102, 241, .07);
  box-shadow: 0 0 0 1.5px rgba(99, 102, 241, .35);
}
.sv-editing .sv-title[contenteditable="true"]:focus,
.sv-editing .sv-desc[contenteditable="true"]:focus {
  outline: none;
  background: #fff;
  box-shadow: 0 0 0 2px #6366f1;
}
.sv-editing .sv-free .sv-card.sv-win { position: absolute; }
.sv-win-bar {
  position: absolute; top: 0; left: 0; right: 0; height: 20px; z-index: 11;
  display: flex; align-items: center; justify-content: center;
  font-size: 8.5px; font-weight: 700; letter-spacing: 2px; color: #6366f1;
  background: rgba(99, 102, 241, .1);
  border-radius: 20px 20px 0 0;
  cursor: grab; user-select: none; touch-action: none;
}
.sv-win-bar:active { cursor: grabbing; }
.sv-rz { position: absolute; z-index: 12; touch-action: none; }
.sv-rz-e { right: -3px; top: 20px; bottom: 10px; width: 9px; cursor: ew-resize; }
.sv-rz-s { bottom: -3px; left: 10px; right: 18px; height: 9px; cursor: ns-resize; }
.sv-rz-se {
  right: -2px; bottom: -2px; width: 16px; height: 16px; cursor: nwse-resize;
  border-right: 3px solid #6366f1; border-bottom: 3px solid #6366f1;
  border-radius: 0 0 8px 0; opacity: .75;
}

/* ============================ configurador ============================ */
.cfg-layout { display: grid; grid-template-columns: 320px 1fr; gap: 0; min-height: 100vh; }
.cfg-panel {
  background: rgba(255, 255, 255, .82);
  backdrop-filter: blur(8px);
  border-right: 1px solid rgba(148, 163, 184, .25);
  max-height: 100vh;
  position: sticky; top: 0;
  display: flex; flex-direction: column;
}
/* pestaña-cabecera del panel (siempre visible, alterna plegado) */
.cfg-tab {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 14px 18px;
  font-weight: 700; font-size: 15px; color: #1e293b;
  border-bottom: 1px solid rgba(148, 163, 184, .2);
  cursor: pointer; user-select: none; flex: none;
}
.cfg-tab:hover { background: rgba(99, 102, 241, .06); }
.cfg-tab-title { display: flex; align-items: center; gap: 9px; }
.cfg-tab-title svg { width: 17px; height: 17px; color: #6366f1; }
.cfg-tab-chevron svg { width: 16px; height: 16px; color: #64748b; transition: transform .3s; }
.panel-collapsed .cfg-tab-chevron svg { transform: rotate(180deg); }
.cfg-body { padding: 16px 18px 40px; overflow-y: auto; }
.cfg-sub { margin: 0 0 16px; font-size: 12px; color: #64748b; line-height: 1.5; }
.cfg-back {
  display: inline-flex; align-items: center; gap: 7px; margin-bottom: 12px;
  font-size: 12px; font-weight: 600; color: #6366f1; text-decoration: none;
  border: 1.5px solid #d5d3f7; background: #fff; border-radius: 999px; padding: 6px 13px;
  transition: all .15s;
}
.cfg-back:hover { background: #6366f1; color: #fff; }
.cfg-back svg { width: 13px; height: 13px; }

/* escritorio plegado: el panel se convierte en una píldora flotante */
@media (min-width: 901px) {
  .cfg-layout.panel-collapsed { grid-template-columns: 1fr; }
  .panel-collapsed .cfg-panel {
    position: fixed; top: 14px; left: 14px; width: auto; max-height: none;
    border: 1px solid rgba(148, 163, 184, .35); border-radius: 999px;
    box-shadow: 0 8px 24px rgba(30, 41, 59, .16);
    overflow: hidden; z-index: 40;
  }
  .panel-collapsed .cfg-tab { border-bottom: none; padding: 10px 18px; }
  .panel-collapsed .cfg-body { display: none; }
}
.cfg-group { margin-bottom: 16px; }
.cfg-group > label, .cfg-legend {
  display: block; font-size: 10px; font-weight: 700; letter-spacing: 1.4px;
  color: #64748b; margin-bottom: 6px; text-transform: uppercase;
}
.cfg-group select, .cfg-group input[type="text"], .cfg-group input[type="number"] {
  width: 100%; padding: 8px 11px; border-radius: 10px; border: 1.5px solid #dbe1ea;
  font-family: var(--font-mono); font-size: 12.5px; background: #fff; color: #1e293b;
}
.cfg-group select { font-family: var(--font-ui); }
.cfg-group select:focus, .cfg-group input:focus { outline: none; border-color: #6366f1; }
.cfg-hint { font-size: 10.5px; color: #94a3b8; margin-top: 4px; line-height: 1.4; }
.cfg-row { display: flex; gap: 8px; align-items: center; }
.cfg-row > * { flex: 1; }

/* deslizadores de apariencia con valor en vivo */
.cfg-range { display: grid; grid-template-columns: 1fr 64px 34px; align-items: center; gap: 8px; margin-bottom: 7px; }
.cfg-range span { font-size: 11.5px; color: #475569; }
.cfg-range input[type="range"] { width: 100%; accent-color: #6366f1; cursor: pointer; }
.cfg-range output { font-family: var(--font-mono); font-size: 11px; font-weight: 700; color: #6366f1; text-align: right; }

.cfg-colors { display: grid; grid-template-columns: 1fr 1fr; gap: 7px; }
.cfg-color { display: flex; align-items: center; gap: 7px; background: #fff; border: 1.5px solid #dbe1ea; border-radius: 10px; padding: 4px 7px; }
.cfg-color input[type="color"] { width: 28px; height: 28px; border: none; background: none; padding: 0; cursor: pointer; }
.cfg-color span { font-size: 11px; color: #475569; }
.cfg-checks label { display: flex; align-items: center; gap: 8px; font-size: 12.5px; color: #334155; margin-bottom: 5px; cursor: pointer; }
.cfg-checks input { accent-color: #6366f1; width: 14px; height: 14px; }
.cfg-btn {
  width: 100%; padding: 9px 13px; margin-bottom: 7px;
  border-radius: 11px; border: 1.5px solid #dbe1ea; background: #fff;
  font-size: 12.5px; font-weight: 600; color: #334155; cursor: pointer;
  display: flex; align-items: center; gap: 9px; justify-content: center;
  transition: all .15s;
}
.cfg-btn svg { width: 15px; height: 15px; flex: none; }
.cfg-btn:hover { border-color: #6366f1; color: #4f46e5; }
.cfg-btn-primary { background: #6366f1; border-color: #6366f1; color: #fff; }
.cfg-btn-primary:hover { background: #4f46e5; color: #fff; }
.cfg-sep { border: none; border-top: 1px solid rgba(148, 163, 184, .3); margin: 16px 0; }
.cfg-main { overflow-y: auto; max-height: 100vh; }
.cfg-toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  background: #1e293b; color: #fff; font-size: 13px; padding: 10px 20px;
  border-radius: 999px; opacity: 0; pointer-events: none; transition: opacity .3s;
  z-index: 50;
}
.cfg-toast.show { opacity: 1; }

/* móvil: hoja inferior que se desliza; plegada queda como pestaña abajo */
@media (max-width: 900px) {
  .cfg-layout { grid-template-columns: 1fr; }
  .cfg-main { max-height: none; padding-bottom: 72px; }
  .cfg-panel {
    position: fixed; left: 0; right: 0; bottom: 0; top: auto;
    max-height: 80vh; z-index: 40;
    border-right: none; border-top: 1px solid rgba(148, 163, 184, .25);
    border-radius: 20px 20px 0 0;
    background: rgba(255, 255, 255, .97);
    box-shadow: 0 -12px 34px rgba(30, 41, 59, .18);
    transition: transform .35s cubic-bezier(.4, 0, .2, 1);
  }
  .cfg-layout.panel-collapsed .cfg-panel { transform: translateY(calc(100% - 52px)); }
  .cfg-tab { min-height: 52px; padding-top: 18px; justify-content: center; gap: 14px; position: relative; }
  .cfg-tab::before {
    content: ''; position: absolute; top: 8px; left: 50%; transform: translateX(-50%);
    width: 44px; height: 4px; border-radius: 2px; background: #cbd5e1;
  }
  .panel-collapsed .cfg-body { display: block; }
}