/* ============================================================
   Matemágicas — tema "Magia estelar"
   Cielo nocturno con estrellas, carta clara para leer bien,
   acentos mágicos (violeta, oro, rosa, cian) y chispas al acertar.
   ============================================================ */

/* Fuentes SELF-HOSTED (privacidad: cero pedidos a Google desde dispositivos
   de niños; además funcionan offline). Son variables: un archivo cubre todos
   los pesos. Licencia SIL OFL (assets/fonts/OFL.txt). */
@font-face {
  font-family: 'Fredoka';
  src: url('assets/fonts/fredoka-var.woff2') format('woff2');
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Nunito';
  src: url('assets/fonts/nunito-var.woff2') format('woff2');
  font-weight: 200 1000;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg-deep: #160d3d;
  --bg-1: #3a1d6e;
  --bg-2: #201554;
  --surface: #fffdf7;
  --ink: #2b2350;
  --ink-soft: #6f6a9c;
  --primary: #6d4aff;
  --primary-dark: #5634e0;
  --gold: #ffc93c;
  --pink: #ff6fb5;
  --cyan: #45d3e0;
  --correct: #2ecc71;
  --correct-dark: #25a85c;
  --wrong: #ff5c6c;
  --wrong-dark: #e0414f;
  --chip: #efeaff;
  --chip-ink: #5b5394;
  --shadow: 0 24px 60px rgba(12, 6, 45, 0.5);
  --shadow-sm: 0 6px 16px rgba(40, 20, 90, 0.16);
  --radius: 26px;
  --radius-sm: 15px;
  --font-display: 'Fredoka', 'Baloo 2', system-ui, -apple-system, sans-serif;
  --font-body: 'Nunito', system-ui, -apple-system, sans-serif;
}

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

html,
body {
  height: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(ellipse at 50% -10%, #4a2585 0%, var(--bg-1) 35%, var(--bg-2) 65%, var(--bg-deep) 100%);
  background-attachment: fixed;
  min-height: 100%;
  -webkit-font-smoothing: antialiased;
}

/* Campo de estrellas (dos capas: fijas + titilantes) */
body::before,
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
body::before {
  background-image:
    radial-gradient(1.5px 1.5px at 12% 18%, #fff, transparent),
    radial-gradient(1.5px 1.5px at 28% 42%, #fff, transparent),
    radial-gradient(2px 2px at 47% 12%, #ffe9a8, transparent),
    radial-gradient(1.5px 1.5px at 63% 33%, #cfe8ff, transparent),
    radial-gradient(1.5px 1.5px at 82% 22%, #fff, transparent),
    radial-gradient(2px 2px at 90% 55%, #ffd6f0, transparent),
    radial-gradient(1.5px 1.5px at 73% 68%, #fff, transparent),
    radial-gradient(1.5px 1.5px at 18% 72%, #cfe8ff, transparent),
    radial-gradient(1.5px 1.5px at 8% 88%, #fff, transparent),
    radial-gradient(2px 2px at 55% 85%, #ffe9a8, transparent),
    radial-gradient(1.5px 1.5px at 38% 92%, #fff, transparent),
    radial-gradient(1.5px 1.5px at 95% 90%, #fff, transparent);
  opacity: 0.85;
}
body::after {
  background-image:
    radial-gradient(2px 2px at 22% 28%, #fff, transparent),
    radial-gradient(2.5px 2.5px at 68% 18%, var(--gold), transparent),
    radial-gradient(2px 2px at 85% 78%, var(--cyan), transparent),
    radial-gradient(2.5px 2.5px at 33% 62%, var(--pink), transparent);
  opacity: 0.7;
  animation: twinkle 3.5s ease-in-out infinite;
}
@keyframes twinkle {
  0%,
  100% {
    opacity: 0.25;
  }
  50% {
    opacity: 0.9;
  }
}

.app {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
}

/* ---------- Tarjeta / pantalla ---------- */
.screen {
  position: relative;
  width: 100%;
  max-width: 560px;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow), 0 0 0 1px rgba(255, 255, 255, 0.6) inset;
  padding: 26px 24px 30px;
  animation: screen-in 0.4s ease;
}
/* Halo mágico alrededor de la carta */
.screen::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  padding: 2px;
  background: linear-gradient(135deg, var(--gold), var(--pink), var(--cyan));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.55;
  pointer-events: none;
}

@keyframes screen-in {
  from {
    opacity: 0;
    transform: translateY(14px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- Botones ---------- */
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  font-weight: 700;
}

.btn-primary,
.btn-secondary {
  width: 100%;
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: #fff;
  box-shadow: var(--shadow-sm);
  transition: transform 0.08s ease, filter 0.15s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--pink));
}
.btn-secondary {
  background: linear-gradient(135deg, var(--gold), #ff9f45);
  color: #5a3d00;
}
.btn-primary.big {
  padding: 20px;
  font-size: 1.45rem;
  margin-top: 8px;
  box-shadow: var(--shadow-sm), 0 0 24px rgba(109, 74, 255, 0.45);
}
.btn-primary:hover,
.btn-secondary:hover {
  filter: brightness(1.06);
}
.btn-primary:active,
.btn-secondary:active {
  transform: translateY(2px) scale(0.99);
}
.btn-primary:disabled {
  background: #d9d3ec;
  color: #9a93bd;
  box-shadow: none;
  cursor: not-allowed;
}

.btn-ghost {
  background: transparent;
  color: var(--ink-soft);
  padding: 8px 12px;
  border-radius: 10px;
  font-size: 0.95rem;
  transition: background 0.15s ease;
}
.btn-ghost:hover {
  background: var(--chip);
}
.btn-ghost.icon {
  font-size: 1.2rem;
  padding: 6px 10px;
}

/* ---------- Pantalla de inicio ---------- */
.hero {
  text-align: center;
  margin-bottom: 18px;
}
.hero-emoji {
  font-size: 3.4rem;
  line-height: 1;
  filter: drop-shadow(0 4px 10px rgba(109, 74, 255, 0.45));
  animation: float 4s ease-in-out infinite;
}
@keyframes float {
  0%,
  100% {
    transform: translateY(0) rotate(-6deg);
  }
  50% {
    transform: translateY(-7px) rotate(6deg);
  }
}
.hero-avatar {
  width: 88px;
  height: 88px;
  margin: 0 auto;
  padding: 0;
  border: none;
  border-radius: 50%;
  overflow: hidden;
  cursor: pointer;
  background: #efe7ff;
  box-shadow: 0 8px 22px rgba(109, 74, 255, 0.4), 0 0 0 4px var(--primary);
  animation: float 4s ease-in-out infinite;
}
.avatar-svg {
  display: block;
  width: 100%;
  height: 100%;
}
.avatar-edit-hint {
  display: block;
  margin: 8px auto 0;
  background: var(--chip);
  color: var(--chip-ink);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 5px 14px;
  border-radius: 999px;
}
.avatar-edit-hint:hover {
  background: #e2daff;
}

/* ---------- Editor de avatar ---------- */
.avatar-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.avatar-bar-title {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--ink);
}
.avatar-ok {
  background: linear-gradient(135deg, var(--primary), var(--pink));
  color: #fff;
  font-family: var(--font-display);
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 999px;
}
.avatar-preview-wrap {
  display: flex;
  justify-content: center;
  margin: 6px 0 14px;
}
.avatar-preview {
  width: 150px;
  height: 150px;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow-sm), 0 0 0 4px #fff, 0 0 0 6px var(--chip);
}
.avatar-tabs {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 6px;
  margin-bottom: 12px;
}
.avatar-tab {
  flex: 0 0 auto;
  width: 46px;
  height: 46px;
  font-size: 1.3rem;
  border-radius: 14px;
  background: var(--chip);
  border: 3px solid transparent;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.avatar-tab.active {
  background: #fff;
  border-color: var(--primary);
}
.avatar-panel-title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink-soft);
  margin: 10px 0 8px;
}
.avatar-swatches {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.avatar-swatch {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--sw);
  border: 3px solid transparent;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.12) inset;
  transition: transform 0.08s ease, border-color 0.15s ease;
}
.avatar-swatch:hover {
  transform: translateY(-2px);
}
.avatar-swatch.selected {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px var(--primary);
}
.avatar-options {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.avatar-option {
  border-radius: 14px;
  overflow: hidden;
  padding: 0;
  border: 3px solid transparent;
  background: var(--chip);
  display: flex;
  flex-direction: column;
  transition: transform 0.08s ease, border-color 0.15s ease;
}
.avatar-option-thumb {
  display: block;
  aspect-ratio: 1 / 1;
}
.avatar-option-thumb svg {
  display: block;
  width: 100%;
  height: 100%;
}
.avatar-option-label {
  font-size: 0.9rem;
  line-height: 1.4;
  padding: 1px 0 3px;
  background: #fff;
}
.avatar-option:hover {
  transform: translateY(-2px);
}
.avatar-option.selected {
  border-color: var(--primary);
  box-shadow: 0 4px 12px rgba(109, 74, 255, 0.35);
}

.app-title {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 700;
  margin-top: 4px;
  letter-spacing: 0.5px;
  background: linear-gradient(100deg, var(--primary), var(--pink) 55%, var(--gold));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.app-subtitle {
  color: var(--ink-soft);
  font-size: 1.05rem;
  font-weight: 600;
}

.best-badge {
  text-align: center;
  background: linear-gradient(135deg, #fff6e0, #ffeac2);
  color: #9a6a16;
  border: 2px dashed var(--gold);
  border-radius: var(--radius-sm);
  padding: 10px;
  font-weight: 800;
  margin-bottom: 6px;
}

.section {
  margin: 18px 0;
}
.section-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.chip {
  flex: 1 1 auto;
  min-width: 120px;
  background: var(--chip);
  color: var(--chip-ink);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  border: 3px solid transparent;
  transition: transform 0.08s ease, border-color 0.15s ease, background 0.15s ease,
    box-shadow 0.2s ease;
}
.chip small {
  font-family: var(--font-body);
  font-weight: 700;
  opacity: 0.7;
  font-size: 0.82rem;
}
.chip:hover {
  transform: translateY(-2px);
}
.chip.selected {
  background: linear-gradient(135deg, var(--primary), var(--pink));
  border-color: transparent;
  color: #fff;
  box-shadow: 0 6px 18px rgba(109, 74, 255, 0.4);
}
.chip.selected small {
  opacity: 0.9;
}

/* ---------- Pantalla de juego ---------- */
.quiz-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}
.quiz-header-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.2;
}
.progress-label {
  font-size: 0.9rem;
  color: var(--ink-soft);
  font-weight: 800;
}
.streak-label {
  font-size: 0.82rem;
  color: var(--pink);
  font-weight: 800;
  min-height: 1em;
}

.progress-bar {
  height: 8px;
  background: var(--chip);
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 18px;
}
.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--primary), var(--pink));
  border-radius: 999px;
  transition: width 0.3s ease;
}

/* Ecuación con casilla de respuesta: "8 × 5 = [ 42 ]" */
.equation {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 2.8rem;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--ink);
  margin: 6px 0 16px;
}
.equation.pop {
  animation: pop 0.3s ease;
}
.equals {
  color: var(--ink-soft);
}
.answer-box {
  min-width: 2.6ch;
  padding: 2px 16px;
  border-radius: 14px;
  background: #f3efff;
  color: var(--primary-dark);
  border: 3px solid var(--primary);
  text-align: center;
  box-shadow: 0 0 18px rgba(109, 74, 255, 0.25);
}
.answer-box:empty::before {
  content: '?';
  color: var(--ink-soft);
  opacity: 0.35;
}
.answer-box.correct {
  background: var(--correct);
  border-color: var(--correct-dark);
  color: #fff;
  box-shadow: 0 0 26px rgba(46, 204, 113, 0.6);
  animation: bounce 0.4s ease;
}
.answer-box.wrong {
  background: var(--wrong);
  border-color: var(--wrong-dark);
  color: #fff;
  box-shadow: 0 0 26px rgba(255, 92, 108, 0.5);
  animation: shake 0.4s ease;
}
.answer-box.reveal {
  background: #fff3d6;
  border-color: var(--gold);
  color: #c98a10;
  box-shadow: 0 0 22px rgba(255, 201, 60, 0.5);
}

/* Fracción apilada: numerador sobre la barra sobre denominador (cálculo mental) */
.frac {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  vertical-align: middle;
  line-height: 1.02;
}
.frac-n,
.frac-d {
  padding: 0 4px;
}
.frac-line {
  align-self: stretch;
  min-width: 1.2ch;
  height: 4px;
  margin: 3px 0;
  border-radius: 2px;
  background: currentColor;
}
.frac-expr {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.frac-expr .op {
  color: var(--ink-soft);
}
.equation.has-fraction {
  font-size: 2.2rem;
}
.frac-answer .frac-line {
  background: var(--primary);
}
.frac-box {
  min-width: 1.7ch;
  padding: 0 10px;
  border-radius: 12px;
  background: #f3efff;
  color: var(--primary-dark);
  border: 3px solid #d9cff8;
  text-align: center;
  cursor: pointer;
}
.frac-box:empty::before {
  content: '?';
  color: var(--ink-soft);
  opacity: 0.35;
}
.frac-box.active {
  border-color: var(--primary);
  box-shadow: 0 0 16px rgba(109, 74, 255, 0.4);
}
.frac-box.correct {
  background: var(--correct);
  border-color: var(--correct-dark);
  color: #fff;
}
.frac-box.wrong {
  background: var(--wrong);
  border-color: var(--wrong-dark);
  color: #fff;
}
.frac-box.reveal {
  background: #fff3d6;
  border-color: var(--gold);
  color: #c98a10;
}
.frac-box.nudge {
  animation: shake 0.35s ease;
}

/* Chispas del "hechizo" al acertar */
.spark {
  position: absolute;
  z-index: 3;
  font-size: 16px;
  pointer-events: none;
  animation: spark-fly 0.7s ease-out forwards;
}
@keyframes spark-fly {
  0% {
    transform: translate(-50%, -50%) scale(0.3);
    opacity: 1;
  }
  100% {
    transform: translate(calc(-50% + var(--dx)), calc(-50% + var(--dy))) scale(1.1) rotate(var(--r));
    opacity: 0;
  }
}

@keyframes pop {
  0% {
    transform: scale(0.7);
    opacity: 0;
  }
  70% {
    transform: scale(1.08);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.timer-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}
.timer-bar {
  flex: 1;
  height: 14px;
  background: var(--chip);
  border-radius: 999px;
  overflow: hidden;
}
.timer-fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--primary));
  border-radius: 999px;
  transition: width 0.1s linear, background 0.3s ease;
}
.timer-fill.low {
  background: linear-gradient(90deg, var(--wrong), var(--pink));
}
.timer-num {
  width: 2.2ch;
  text-align: center;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--ink-soft);
}

/* Pausas: botón junto al reloj + overlay + insignias */
.pause-btn {
  flex: 0 0 auto;
  background: var(--chip);
  color: var(--primary-dark);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 6px 12px;
  border-radius: 999px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.08s ease, background 0.15s ease;
}
.pause-btn:hover:not(:disabled) {
  background: #e7ecff;
  transform: translateY(-1px);
}
.pause-btn:disabled {
  opacity: 0.45;
  cursor: default;
}
.pause-overlay {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(32, 21, 84, 0.55);
  border-radius: var(--radius);
}
.pause-overlay.hidden {
  display: none;
}
.pause-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 28px 26px;
  text-align: center;
  box-shadow: var(--shadow);
  max-width: 300px;
  animation: pop 0.3s ease;
}
.pause-emoji {
  font-size: 3rem;
}
.pause-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.5rem;
  color: var(--ink);
  margin: 4px 0;
}
.pause-sub {
  color: var(--ink-soft);
  font-size: 0.9rem;
  margin-bottom: 16px;
}
.pause-card .btn-primary {
  width: auto;
  padding: 12px 30px;
}
.pause-award {
  background: linear-gradient(135deg, #efe7ff, #ffe9f4);
  border: 2px dashed var(--primary);
  color: var(--primary-dark);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  font-weight: 800;
  margin: 0 0 16px;
}
.pause-badge {
  text-align: center;
  background: #efe9ff;
  color: var(--primary-dark);
  border: 2px dashed var(--primary);
  border-radius: var(--radius-sm);
  padding: 9px;
  font-weight: 700;
  margin-bottom: 6px;
  font-size: 0.92rem;
}

/* Teclado numérico (tipo numpad), teclas como fichas mágicas */
.keypad {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  max-width: 340px;
  margin: 0 auto;
}
.key {
  padding: 18px 0;
  font-family: var(--font-display);
  font-size: 1.9rem;
  font-weight: 600;
  color: var(--ink);
  background: linear-gradient(180deg, #ffffff, #f1ecff);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm), 0 0 0 1px rgba(109, 74, 255, 0.08) inset;
  transition: transform 0.06s ease, background 0.15s ease, box-shadow 0.2s ease;
}
.key:hover:not(:disabled) {
  background: linear-gradient(180deg, #f4f0ff, #e7deff);
}
.key:active:not(:disabled) {
  transform: scale(0.93);
  box-shadow: 0 0 16px rgba(109, 74, 255, 0.35);
}
.key:disabled {
  opacity: 0.5;
  cursor: default;
}
.key.delete {
  background: linear-gradient(180deg, #fff0f2, #ffe0e4);
  color: var(--wrong-dark);
}
.key.enter {
  background: linear-gradient(135deg, var(--primary), var(--pink));
  color: #fff;
  box-shadow: var(--shadow-sm), 0 0 18px rgba(255, 111, 181, 0.45);
}
.key.wide {
  grid-column: span 2;
}

@keyframes bounce {
  0%,
  100% {
    transform: scale(1);
  }
  40% {
    transform: scale(1.14);
  }
}
@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-6px);
  }
  75% {
    transform: translateX(6px);
  }
}

.feedback {
  text-align: center;
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 600;
  min-height: 1.6em;
  margin-top: 16px;
  opacity: 0;
  transition: opacity 0.2s ease;
}
.feedback.show {
  opacity: 1;
}
.feedback.correct {
  color: var(--correct-dark);
}
.feedback.wrong {
  color: var(--wrong-dark);
}
.feedback.timeout {
  color: #c98a10;
}

/* ---------- Pantalla de resultados ---------- */
.results-screen {
  text-align: center;
}
.results-emoji {
  font-size: 3.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}
.results-avatar {
  width: 62px;
  height: 62px;
  border-radius: 50%;
  overflow: hidden;
  box-shadow: 0 0 0 3px var(--primary);
}
.results-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  margin: 6px 0 4px;
}
.score-big {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 700;
  line-height: 1;
  margin: 8px 0 18px;
  background: linear-gradient(120deg, var(--primary), var(--pink), var(--gold));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.score-big span {
  font-size: 1.6rem;
  color: var(--ink-soft);
  -webkit-text-fill-color: var(--ink-soft);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 18px;
}
.stat-card {
  background: var(--chip);
  border-radius: var(--radius-sm);
  padding: 14px 8px;
}
.stat-icon {
  font-size: 1.4rem;
}
.stat-value {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--ink);
}
.stat-label {
  font-size: 0.78rem;
  color: var(--ink-soft);
  font-weight: 700;
}

.category-section {
  text-align: left;
  margin: 18px 0;
}
.category-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 8px 0;
}
.category-name {
  width: 128px;
  font-weight: 800;
  font-size: 0.85rem;
}
.category-bar {
  flex: 1;
  height: 12px;
  background: var(--chip);
  border-radius: 999px;
  overflow: hidden;
}
.category-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--primary));
  border-radius: 999px;
}
.category-score {
  width: 52px;
  text-align: right;
  font-weight: 800;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.perfect-note {
  background: #eafaf0;
  color: var(--correct-dark);
  border-radius: var(--radius-sm);
  padding: 12px;
  font-weight: 800;
  margin: 16px 0;
}

.missed-section {
  text-align: left;
  background: #fff6f7;
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin: 16px 0;
}
.missed-section summary {
  cursor: pointer;
  font-weight: 800;
  color: var(--wrong-dark);
}
.missed-list {
  margin-top: 10px;
  display: grid;
  gap: 6px;
}
.missed-item {
  display: flex;
  justify-content: space-between;
  font-size: 0.95rem;
  padding: 6px 0;
  border-bottom: 1px dashed #f0d4d7;
}
.missed-prompt {
  font-weight: 800;
}
.missed-yours {
  color: var(--ink-soft);
}

.results-actions {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

/* Pie para compartir / abrir en otro dispositivo (código QR) */
.share-footer {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 2px dashed var(--chip);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.qr-img {
  width: 120px;
  height: 120px;
  border-radius: 12px;
  background: #fff;
  padding: 6px;
  box-shadow: var(--shadow-sm);
}
.share-caption {
  font-size: 0.85rem;
  color: var(--ink-soft);
  text-align: center;
  max-width: 260px;
  font-weight: 600;
}

/* ---------- Responsivo ---------- */
@media (max-width: 420px) {
  .screen {
    padding: 20px 16px 24px;
  }
  .equation {
    font-size: 2.2rem;
  }
  .equation.has-fraction {
    font-size: 1.9rem;
  }
  .key {
    font-size: 1.7rem;
    padding: 15px 0;
  }
  .avatar {
    font-size: 1.4rem;
  }
  .stat-value {
    font-size: 1.25rem;
  }
}

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

/* === F1: pedagogía === */

/* Chip de racha 🔥 en el hub */
.streak-chip {
  text-align: center;
  background: linear-gradient(135deg, #ffe9d6, #ffd9e8);
  color: #a34a12;
  border: 2px dashed #ff9f45;
  border-radius: var(--radius-sm);
  padding: 10px;
  font-weight: 800;
  margin-bottom: 6px;
}

/* Oferta amable de reparar la racha (hueco de 1 día + pausas disponibles) */
.streak-repair {
  background: linear-gradient(135deg, #fff6e0, #ffe9f4);
  border: 2px dashed var(--gold);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-bottom: 6px;
  text-align: center;
}
.streak-repair-text {
  font-weight: 800;
  color: #9a6a16;
  margin-bottom: 10px;
}
.streak-repair-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}
.streak-repair-actions .btn-secondary {
  width: auto;
  padding: 10px 16px;
  font-size: 1rem;
}

/* Tarjeta de la misión del día 🎯 */
.mission-card {
  background: linear-gradient(135deg, #efe7ff, #e3f7ff);
  border: 2px dashed var(--primary);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin-bottom: 6px;
}
.mission-card.done {
  background: linear-gradient(135deg, #e2f9ec, #fff6e0);
  border-color: var(--correct);
}
.mission-title {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 2px;
}
.mission-card.done .mission-title {
  color: var(--correct-dark);
}
.mission-desc {
  color: var(--ink);
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 8px;
}
.mission-bar {
  height: 12px;
  background: rgba(109, 74, 255, 0.15);
  border-radius: 999px;
  overflow: hidden;
}
.mission-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--pink));
  border-radius: 999px;
  transition: width 0.4s ease;
}
.mission-card.done .mission-bar-fill {
  background: linear-gradient(90deg, var(--correct), var(--gold));
}
.mission-progress {
  text-align: right;
  font-weight: 800;
  font-size: 0.85rem;
  color: var(--ink-soft);
  margin-top: 4px;
}

/* Coronas 👑 de dominio en los chips de operación */
.op-crowns {
  font-size: 0.7rem;
  letter-spacing: 1px;
  opacity: 1 !important;
}

/* Fila de rondas especiales: "Para ti ✨" y "Repasar 🔁" */
.start-extra {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}
.start-extra .btn-secondary {
  flex: 1 1 0;
  padding: 14px 12px;
  font-size: 1.05rem;
}

/* Novedades en resultados (misión cumplida, racha) */
.novedades {
  background: linear-gradient(135deg, #fff6e0, #efe7ff);
  border: 2px dashed var(--gold);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  margin: 0 0 16px;
  text-align: center;
}
.novedad-line {
  font-weight: 800;
  color: #9a6a16;
  padding: 2px 0;
}

/* Ceremonia de desbloqueo: "¡Nuevo logro!" elige 1 de 3 */
.unlock-overlay {
  position: absolute;
  inset: 0;
  z-index: 6;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(32, 21, 84, 0.6);
  border-radius: var(--radius);
  padding: 16px;
}
.unlock-card {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px 22px;
  text-align: center;
  box-shadow: var(--shadow);
  max-width: 340px;
  width: 100%;
  animation: pop 0.3s ease;
}
.unlock-emoji {
  font-size: 3rem;
}
.unlock-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.6rem;
  background: linear-gradient(100deg, var(--primary), var(--pink) 55%, var(--gold));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin: 2px 0;
}
.unlock-subtitle {
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 8px;
}
.unlock-cta {
  color: var(--ink-soft);
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.unlock-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 12px;
}
.unlock-option {
  border-radius: 14px;
  overflow: hidden;
  padding: 0;
  border: 3px solid transparent;
  background: var(--chip);
  display: flex;
  flex-direction: column;
  transition: transform 0.08s ease, border-color 0.15s ease;
}
.unlock-option:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
}
.unlock-thumb {
  display: block;
  aspect-ratio: 1 / 1;
}
.unlock-thumb svg {
  display: block;
  width: 100%;
  height: 100%;
}
.unlock-label {
  font-size: 0.82rem;
  font-weight: 800;
  line-height: 1.35;
  padding: 2px 2px 4px;
  background: #fff;
  color: var(--ink);
}

/* Ítems bloqueados 🔒 en el editor de avatar */
.avatar-option {
  position: relative;
}
.avatar-option.locked {
  cursor: not-allowed;
}
.avatar-option.locked .avatar-option-thumb {
  filter: grayscale(0.9) brightness(0.92);
  opacity: 0.65;
}
.avatar-option-lock {
  position: absolute;
  top: 4px;
  right: 4px;
  font-size: 1.05rem;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.35);
  pointer-events: none;
}
.avatar-option.denied {
  animation: shake 0.35s ease;
}
.avatar-lock-hint {
  margin-top: 8px;
  text-align: center;
  color: var(--ink-soft);
  font-size: 0.88rem;
  font-weight: 700;
}