/* ═══════════════════════════════════════════════════════════════
   RESONUM QA · Diseño premium
   ═══════════════════════════════════════════════════════════════ */

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

:root {
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Space Grotesk', var(--font-sans);

  /* Tema claro */
  --bg: #f4f4f1;
  --bg-grad: radial-gradient(1200px 600px at 10% -20%, #e9e5ff 0%, transparent 60%),
             radial-gradient(900px 500px at 95% 10%, #ffe0ec 0%, transparent 55%),
             radial-gradient(700px 500px at 50% 110%, #d8f3e6 0%, transparent 55%);
  --surface: #ffffff;
  --surface-2: #fafaf9;
  --surface-elev: #ffffff;
  --border: #e7e5e4;
  --border-strong: #d6d3d1;
  --text: #0c0a09;
  --text-muted: #78716c;
  --text-soft: #a8a29e;
  --shadow-sm: 0 1px 2px rgba(12, 10, 9, 0.04);
  --shadow-md: 0 4px 12px -2px rgba(12, 10, 9, 0.06), 0 2px 4px -1px rgba(12, 10, 9, 0.04);
  --shadow-lg: 0 20px 40px -10px rgba(12, 10, 9, 0.12), 0 8px 16px -4px rgba(12, 10, 9, 0.05);
  --ring: rgba(15, 118, 110, 0.4);

  /* Acento primario del producto */
  --brand: #0f766e;
  --brand-2: #14b8a6;
  --brand-text: #ffffff;

  /* Semánticos */
  --ok: #16a34a;
  --ok-soft: #dcfce7;
  --ok-border: #86efac;
  --danger: #dc2626;

  /* Paletas por sección */
  --pal-azul: #2563eb;        --pal-azul-soft: #dbeafe;
  --pal-cielo: #0ea5e9;       --pal-cielo-soft: #e0f2fe;
  --pal-violeta: #7c3aed;     --pal-violeta-soft: #ede9fe;
  --pal-rosa: #e11d48;        --pal-rosa-soft: #ffe4e6;
  --pal-ambar: #d97706;       --pal-ambar-soft: #fef3c7;
  --pal-fucsia: #c026d3;      --pal-fucsia-soft: #fae8ff;
  --pal-esmeralda: #059669;   --pal-esmeralda-soft: #d1fae5;
  --pal-cian: #0891b2;        --pal-cian-soft: #cffafe;
  --pal-teal: #0d9488;        --pal-teal-soft: #ccfbf1;
  --pal-indigo: #4f46e5;      --pal-indigo-soft: #e0e7ff;
  --pal-pink: #db2777;        --pal-pink-soft: #fce7f3;
  --pal-naranja: #ea580c;     --pal-naranja-soft: #ffedd5;
  --pal-carmesi: #be123c;     --pal-carmesi-soft: #ffe4e6;
  --pal-lima: #65a30d;        --pal-lima-soft: #ecfccb;
}

html[data-tema="oscuro"] {
  --bg: #0a0a09;
  --bg-grad: radial-gradient(1100px 600px at 10% -20%, rgba(139,92,246,0.15) 0%, transparent 60%),
             radial-gradient(900px 500px at 95% 10%, rgba(236,72,153,0.12) 0%, transparent 55%),
             radial-gradient(700px 500px at 50% 110%, rgba(20,184,166,0.12) 0%, transparent 55%);
  --surface: #18181b;
  --surface-2: #0f0f11;
  --surface-elev: #1c1c1f;
  --border: #2a2a2e;
  --border-strong: #3f3f46;
  --text: #fafaf9;
  --text-muted: #a1a1aa;
  --text-soft: #71717a;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 40px -10px rgba(0, 0, 0, 0.6), 0 8px 16px -4px rgba(0, 0, 0, 0.4);
  --brand: #14b8a6;
  --brand-2: #2dd4bf;
  --ok-soft: rgba(22, 163, 74, 0.15);
  --ok-border: rgba(22, 163, 74, 0.5);
}

html, body {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  background-image: var(--bg-grad);
  background-attachment: fixed;
}

code {
  font-family: ui-monospace, 'Cascadia Code', Consolas, monospace;
  font-size: 0.85em;
  background: var(--surface-2);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--text);
}

kbd {
  font-family: ui-monospace, 'Cascadia Code', Consolas, monospace;
  font-size: 11px;
  padding: 2px 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-bottom-width: 2px;
  border-radius: 4px;
  color: var(--text-muted);
  font-weight: 600;
}

/* ═══════════ LAYOUT ═══════════ */

.app {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 0;
  min-height: 100vh;
  max-width: 1600px;
  margin: 0 auto;
}

/* ═══════════ SIDEBAR ═══════════ */

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  border-right: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  overflow-y: auto;
  z-index: 10;
}

.sidebar::-webkit-scrollbar { width: 6px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }

.sidebar-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: 0 8px 20px -6px var(--ring);
}

.brand-logo svg { width: 22px; height: 22px; }

.brand h1 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1;
}

.brand h1 span {
  display: inline-block;
  margin-left: 4px;
  padding: 2px 6px;
  font-size: 10px;
  font-weight: 700;
  background: var(--brand);
  color: var(--brand-text);
  border-radius: 4px;
  vertical-align: middle;
  letter-spacing: 0.05em;
}

.brand p {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.btn-tema {
  width: 36px; height: 36px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text-muted);
  cursor: pointer;
  display: grid;
  place-items: center;
  transition: all 0.2s;
}

.btn-tema:hover { background: var(--surface); color: var(--text); border-color: var(--border-strong); }
.btn-tema svg { width: 16px; height: 16px; position: absolute; transition: opacity 0.2s, transform 0.3s; }
.btn-tema { position: relative; }
html[data-tema="claro"] .btn-tema .ico-luna { opacity: 0; transform: rotate(-90deg) scale(0.5); }
html[data-tema="oscuro"] .btn-tema .ico-sol  { opacity: 0; transform: rotate(90deg)  scale(0.5); }

/* Ring de progreso */
.ring-wrap {
  position: relative;
  width: 180px;
  height: 180px;
  margin: 8px auto 4px;
}

.ring { width: 100%; height: 100%; transform: rotate(-90deg); }

.ring-bg, .ring-fg {
  fill: none;
  stroke-width: 10;
  stroke-linecap: round;
}

.ring-bg { stroke: var(--border); }

.ring-fg {
  stroke: url(#ring-grad);
  stroke: var(--brand);
  stroke-dasharray: 326.7;
  stroke-dashoffset: 326.7;
  transition: stroke-dashoffset 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  filter: drop-shadow(0 4px 8px var(--ring));
}

.ring-centro {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.ring-pct {
  font-family: var(--font-display);
  font-size: 44px;
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-variant-numeric: tabular-nums;
}

.ring-unidad {
  font-size: 16px;
  color: var(--text-muted);
  font-weight: 600;
  margin-top: -4px;
}

.ring-sub {
  font-size: 11px;
  color: var(--text-soft);
  margin-top: 6px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

/* TOC */
.toc {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 4px;
  overflow-y: auto;
  padding-right: 2px;
}

.toc::-webkit-scrollbar { width: 4px; }
.toc::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

.toc-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px;
  border-radius: 8px;
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
  position: relative;
}

.toc-item:hover { background: var(--surface-2); color: var(--text); }
.toc-item.activa { background: var(--surface-2); color: var(--text); }
.toc-item.activa::before {
  content: '';
  position: absolute;
  left: 0;
  top: 20%; bottom: 20%;
  width: 2px;
  background: var(--toc-color, var(--brand));
  border-radius: 1px;
}

.toc-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--toc-color, var(--text-soft));
  flex-shrink: 0;
  opacity: 0.7;
  transition: opacity 0.15s, transform 0.15s;
}

.toc-item:hover .toc-dot, .toc-item.activa .toc-dot { opacity: 1; transform: scale(1.2); }

.toc-item.completa .toc-dot {
  background: var(--ok);
  box-shadow: 0 0 0 3px var(--ok-soft);
}

.toc-nombre { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.toc-count {
  font-size: 11px;
  color: var(--text-soft);
  font-variant-numeric: tabular-nums;
  font-weight: 600;
}

.toc-item.completa .toc-count { color: var(--ok); }

.sidebar-footer {
  padding-top: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btn-reset {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface-2);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-reset:hover {
  background: #fef2f2;
  color: var(--danger);
  border-color: #fecaca;
}

html[data-tema="oscuro"] .btn-reset:hover { background: rgba(220, 38, 38, 0.1); }
.btn-reset svg { width: 14px; height: 14px; }

.hint {
  font-size: 11px;
  color: var(--text-soft);
  text-align: center;
  line-height: 1.4;
}

/* ═══════════ MAIN ═══════════ */

.main {
  padding: 40px 44px 40px;
  min-width: 0;
  max-width: 980px;
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: center;
  padding: 32px 36px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  margin-bottom: 28px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 0%, color-mix(in srgb, var(--brand) 6%, transparent) 100%);
  pointer-events: none;
}

.hero-izq { position: relative; }

.hero-kicker {
  display: inline-block;
  padding: 4px 10px;
  background: var(--brand);
  color: var(--brand-text);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 999px;
  margin-bottom: 14px;
}

.hero h2 {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.15;
  margin-bottom: 10px;
}

.hero h2 em {
  font-style: italic;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  color: var(--text-muted);
  font-size: 14px;
  max-width: 520px;
}

.hero-der {
  display: flex;
  gap: 20px;
  align-items: center;
  padding: 18px 22px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  position: relative;
}

.hero-stat { text-align: center; }

.hero-num {
  display: block;
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--text);
  font-variant-numeric: tabular-nums;
}

.hero-num i {
  font-style: normal;
  color: var(--text-muted);
  font-weight: 600;
}

.hero-barra { color: var(--text-soft); font-weight: 500; margin: 0 2px; }

.hero-label {
  display: block;
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  margin-top: 6px;
  font-weight: 600;
}

.hero-div { width: 1px; align-self: stretch; background: var(--border); }

/* Toolbar */
.toolbar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  margin-bottom: 22px;
  position: sticky;
  top: 8px;
  z-index: 20;
}

.buscador {
  position: relative;
  display: flex;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.buscador:focus-within {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand) 15%, transparent);
}

.buscador svg {
  width: 16px;
  height: 16px;
  margin-left: 14px;
  color: var(--text-soft);
}

.buscador input {
  flex: 1;
  padding: 11px 14px 11px 10px;
  border: none;
  background: transparent;
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  outline: none;
}

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

.buscador kbd { margin-right: 10px; }

.filtros {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
}

.filtro {
  padding: 7px 14px;
  border: none;
  background: transparent;
  border-radius: 8px;
  font-family: inherit;
  font-size: 13px;
  color: var(--text-muted);
  cursor: pointer;
  font-weight: 500;
  transition: all 0.15s;
  white-space: nowrap;
}

.filtro:hover { color: var(--text); }
.filtro.activo { background: var(--text); color: var(--surface); box-shadow: var(--shadow-sm); }

/* ═══════════ SECCIONES ═══════════ */

.secciones {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

section[data-seccion] {
  --pal: var(--pal-azul);
  --pal-soft: var(--pal-azul-soft);

  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  overflow: hidden;
  scroll-margin-top: 20px;
  transition: box-shadow 0.25s;
}

section[data-seccion]:hover { box-shadow: var(--shadow-md); }

section[data-paleta="azul"]       { --pal: var(--pal-azul);       --pal-soft: var(--pal-azul-soft); }
section[data-paleta="cielo"]      { --pal: var(--pal-cielo);      --pal-soft: var(--pal-cielo-soft); }
section[data-paleta="violeta"]    { --pal: var(--pal-violeta);    --pal-soft: var(--pal-violeta-soft); }
section[data-paleta="rosa"]       { --pal: var(--pal-rosa);       --pal-soft: var(--pal-rosa-soft); }
section[data-paleta="ambar"]      { --pal: var(--pal-ambar);      --pal-soft: var(--pal-ambar-soft); }
section[data-paleta="fucsia"]     { --pal: var(--pal-fucsia);     --pal-soft: var(--pal-fucsia-soft); }
section[data-paleta="esmeralda"]  { --pal: var(--pal-esmeralda);  --pal-soft: var(--pal-esmeralda-soft); }
section[data-paleta="cian"]       { --pal: var(--pal-cian);       --pal-soft: var(--pal-cian-soft); }
section[data-paleta="teal"]       { --pal: var(--pal-teal);       --pal-soft: var(--pal-teal-soft); }
section[data-paleta="indigo"]     { --pal: var(--pal-indigo);     --pal-soft: var(--pal-indigo-soft); }
section[data-paleta="pink"]       { --pal: var(--pal-pink);       --pal-soft: var(--pal-pink-soft); }
section[data-paleta="naranja"]    { --pal: var(--pal-naranja);    --pal-soft: var(--pal-naranja-soft); }
section[data-paleta="carmesi"]    { --pal: var(--pal-carmesi);    --pal-soft: var(--pal-carmesi-soft); }
section[data-paleta="lima"]       { --pal: var(--pal-lima);       --pal-soft: var(--pal-lima-soft); }

html[data-tema="oscuro"] section[data-seccion] {
  --pal-soft: color-mix(in srgb, var(--pal) 18%, transparent);
}

.sec-cabecera {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 18px;
  align-items: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  background:
    linear-gradient(135deg, var(--pal-soft) 0%, transparent 45%);
  position: relative;
}

.sec-cabecera::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--pal);
}

.sec-icono {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 22px;
  box-shadow: var(--shadow-sm);
}

.sec-titulo h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

.sec-titulo p {
  font-size: 12.5px;
  color: var(--text-muted);
  margin-top: 2px;
}

.sec-progreso {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sec-progreso-num {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--pal);
  font-variant-numeric: tabular-nums;
  min-width: 34px;
  text-align: right;
}

.sec-barra {
  width: 80px;
  height: 6px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
}

.sec-barra-fill {
  height: 100%;
  width: 0%;
  background: var(--pal);
  border-radius: 999px;
  transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

section[data-seccion].completa .sec-progreso-num { color: var(--ok); }
section[data-seccion].completa .sec-barra-fill { background: var(--ok); }

.sec-completado-badge {
  display: none;
}

section[data-seccion].completa .sec-icono::after {
  content: '';
  position: absolute;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--ok);
  margin-left: 32px;
  margin-top: -32px;
  border: 2px solid var(--surface);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' fill='none' stroke='white' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><polyline points='2.5 6.5 5 9 9.5 3.5'/></svg>");
  background-repeat: no-repeat;
  background-position: center;
}

section[data-seccion].completa .sec-icono { position: relative; }

/* Tareas */
.tareas {
  list-style: none;
  padding: 8px;
}

.tareas li {
  border-radius: 12px;
  transition: background 0.15s;
}

.tareas li + li { margin-top: 2px; }

.tareas li:hover {
  background: var(--surface-2);
}

.tareas li.oculta { display: none; }

.tareas li label {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 16px;
  cursor: pointer;
  position: relative;
}

/* Checkbox custom */
.tareas li input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.check {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 8px;
  border: 2px solid var(--border-strong);
  background: var(--surface);
  display: grid;
  place-items: center;
  margin-top: 1px;
  position: relative;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.check::after {
  content: '';
  width: 11px;
  height: 11px;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' fill='none' stroke='white' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'><polyline points='2 6.5 5 9 10 3'/></svg>");
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  opacity: 0;
  transform: scale(0.5);
  transition: opacity 0.15s, transform 0.2s cubic-bezier(0.5, 1.6, 0.5, 1);
}

.tareas li:hover .check { border-color: var(--pal); }

.tareas li.marcado .check {
  background: var(--pal);
  border-color: var(--pal);
  box-shadow: 0 4px 12px -2px color-mix(in srgb, var(--pal) 50%, transparent);
}

.tareas li.marcado .check::after { opacity: 1; transform: scale(1); }

.tareas li div {
  flex: 1;
  min-width: 0;
}

.tareas li strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.005em;
  line-height: 1.4;
  transition: color 0.2s;
}

.tareas li small {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 3px;
  line-height: 1.5;
  transition: color 0.2s;
}

.tareas li.marcado strong {
  color: var(--text-muted);
  text-decoration: line-through;
  text-decoration-color: color-mix(in srgb, var(--pal) 50%, transparent);
  text-decoration-thickness: 2px;
}

.tareas li.marcado small { color: var(--text-soft); }

/* Terminado */
.terminado {
  display: none;
  padding: 48px 32px;
  background: linear-gradient(135deg, var(--ok-soft), color-mix(in srgb, var(--brand) 10%, transparent));
  border: 1px solid var(--ok-border);
  border-radius: 20px;
  text-align: center;
}

.terminado.visible { display: block; animation: fadeUp 0.5s cubic-bezier(0.2, 0.8, 0.2, 1); }

.terminado-emoji {
  font-size: 56px;
  margin-bottom: 12px;
  animation: bounce 1s cubic-bezier(0.28, 0.84, 0.42, 1);
}

.terminado h3 {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  color: var(--ok);
  margin-bottom: 6px;
}

.terminado p {
  color: var(--text-muted);
  font-size: 14px;
  max-width: 420px;
  margin: 0 auto;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes bounce {
  0% { transform: scale(0) rotate(-20deg); }
  50% { transform: scale(1.2) rotate(10deg); }
  100% { transform: scale(1) rotate(0); }
}

/* Footer */
.pie {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 32px 0 8px;
  margin-top: 40px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-soft);
}

.atajos { display: flex; align-items: center; gap: 8px; }
.atajos kbd { margin-right: 2px; }

/* Confetti (decorativo) */
.confetti {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 100;
  overflow: hidden;
}

.confetti i {
  position: absolute;
  top: -20px;
  width: 10px;
  height: 16px;
  border-radius: 2px;
  opacity: 0;
  animation: confetti-fall 2.4s cubic-bezier(0.2, 0.5, 0.5, 1) forwards;
}

@keyframes confetti-fall {
  0% { opacity: 1; transform: translateY(0) rotate(0deg); }
  100% { opacity: 0; transform: translateY(110vh) rotate(720deg); }
}

/* ═══════════ RESPONSIVE ═══════════ */

@media (max-width: 1100px) {
  .app { grid-template-columns: 1fr; }

  .sidebar {
    position: relative;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 20px 24px;
  }

  .ring-wrap { width: 140px; height: 140px; }
  .ring-pct { font-size: 34px; }

  .toc {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 4px;
    max-height: none;
  }

  .main { padding: 24px; }
}

@media (max-width: 720px) {
  .hero { grid-template-columns: 1fr; padding: 24px; }
  .hero h2 { font-size: 24px; }
  .hero-der { width: 100%; justify-content: space-between; padding: 14px; }
  .toolbar { grid-template-columns: 1fr; }
  .sec-cabecera { grid-template-columns: auto 1fr; padding: 16px 18px; }
  .sec-progreso { grid-column: 1 / -1; margin-top: -6px; padding-left: 64px; }
  .main { padding: 20px 16px; }
  .sidebar { padding: 20px 16px; }
  .pie { flex-direction: column; gap: 10px; text-align: center; }
}