:root {
  --bg: #f4f1ec;
  --card: #ffffff;
  --text: #1a1a1a;
  --muted: #8a8580;
  --accent: #1a5fa8;
  --accent-hover: #154d8a;
  --accent-light: #e6f0fb;
  --danger: #c0392b;
  --danger-light: #fdecea;
  --border: #e0dbd0;
  --tag-bg: #f0ede6;
  --green: #2d5a3d;
  --progress-h: 5px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'DM Sans', sans-serif;
  background:
    radial-gradient(circle at 18% 8%, rgba(26,95,168,0.08), transparent 28%),
    radial-gradient(circle at 82% 16%, rgba(45,90,61,0.07), transparent 24%),
    linear-gradient(180deg, #f8f7f3 0%, #eee9df 100%);
  color: var(--text);
  min-height: 100vh;
  font-size: 18px;
}

.site-logo-link {
  position: fixed !important;
  top: 128px !important;
  right: calc(50% - 315px) !important;
  left: auto !important;
  bottom: auto !important;
  z-index: 1200 !important;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  box-shadow: none;
  text-decoration: none;
  transition: transform 0.15s ease;
}

.site-logo-link--landing {
  position: fixed !important;
  top: 76px !important;
  right: calc(50% - 315px) !important;
  left: auto !important;
}

.site-logo-link:hover {
  transform: translateY(-1px);
}

.site-logo {
  display: block;
  width: 295px;
  height: auto;
  max-height: none;
  object-fit: contain;
}

#screen-landing {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at top right, rgba(26,95,168,0.05), transparent 32%),
    linear-gradient(180deg, #f7f7f4 0%, #f3f2ee 100%);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  z-index: 100;
}

.landing-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.landing-bg::before,
.landing-bg::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  background: rgba(26,95,168,0.05);
}

.landing-bg::before {
  width: 600px;
  height: 600px;
  top: -150px;
  right: -100px;
}

.landing-bg::after {
  width: 400px;
  height: 400px;
  bottom: -100px;
  left: -80px;
}

.landing-flag {
  font-size: 4rem;
  margin-bottom: 1.5rem;
  animation: floatFlag 3s ease-in-out infinite;
}

@keyframes floatFlag {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.landing-hero {
  text-align: center;
  max-width: 640px;
  padding: 0 2rem;
  position: relative;
  z-index: 1;
}

.landing-hero h1 {
  font-family: 'Fraunces', serif;
  font-size: clamp(2.4rem, 6vw, 3.8rem);
  font-weight: 700;
  color: #1f2021;
  line-height: 1.15;
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
}

.landing-hero h1 em {
  font-style: italic;
  font-weight: 300;
  color: #4a79b8;
}

.landing-hero p {
  font-size: 1.2rem;
  color: #71706b;
  margin-bottom: 1.2rem;
  font-weight: 300;
  line-height: 1.6;
}

.modo-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 0.75rem;
  justify-content: center;
}

.modo-btn {
  padding: 11px 16px;
  border: 1px solid rgba(255,255,255,0.24);
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  cursor: pointer;
  font-weight: 600;
  color: rgba(255,255,255,0.92);
  transition: 0.2s ease;
  backdrop-filter: blur(6px);
}

.modo-btn:hover {
  transform: translateY(-1px);
  background: rgba(255,255,255,0.14);
}

.modo-btn.active {
  background: #fff;
  color: var(--accent);
  border-color: #fff;
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

#main-app {
  display: none;
  flex-direction: column;
  align-items: center;
  padding: 2.5rem 1rem 4rem;
  min-height: 100vh;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
}

header {
  display: none;
  text-align: left;
  margin-bottom: 1.4rem;
  width: 100%;
  max-width: 1120px;
}

.app-header {
  background: rgba(255,255,255,0.74);
  border: 1px solid rgba(224,219,208,0.9);
  border-radius: 22px;
  padding: 12px 16px;
  backdrop-filter: blur(10px);
  box-shadow: 0 10px 28px rgba(0,0,0,0.04);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-logo-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  text-decoration: none;
}

.brand-logo-img {
  width: 174px;
  height: 174px;
  object-fit: contain;
}

header h1 {
  font-family: 'Fraunces', serif;
  font-size: 2.4rem;
  font-weight: 600;
  letter-spacing: -0.5px;
}

header p {
  font-size: 1rem;
  color: var(--muted);
  margin-top: 4px;
  font-weight: 300;
}

.eyebrow {
  font-size: 1.05rem;
  color: var(--text);
  margin-top: 0;
  font-weight: 700;
}

.streak-pill {
  display: none;
  margin-left: auto;
  background: #fff7dd;
  color: #8a5a00;
  border: 1px solid #efd487;
  border-radius: 999px;
  padding: 9px 14px;
  font-weight: 800;
  box-shadow: 0 8px 20px rgba(138,90,0,0.08);
}

.streak-pill.visible {
  display: inline-flex;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2.5rem;
  width: 100%;
  max-width: 1120px;
  box-shadow: 0 2px 20px rgba(0,0,0,0.06);
}

.activity-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.75fr) minmax(280px, 340px);
  gap: 32px;
  align-items: start;
  text-align: left;
}

.activity-main {
  min-width: 0;
}

#screen-content,
#screen-ejercicio,
#screen-resultado {
  max-width: 820px;
  margin: 0 auto;
}

#screen-activity {
  width: 100%;
}

#screen-content,
#screen-activity,
#screen-resultado { text-align: center; }

#screen-content h2,
#screen-activity h2 {
  font-family: 'Fraunces', serif;
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
}

#screen-content p,
#screen-activity p {
  color: var(--muted);
  font-size: 1.05rem;
  margin-bottom: 2rem;
  line-height: 1.6;
}

.palabras-selector {
  margin-bottom: 2rem;
  background: var(--tag-bg);
  border-radius: 16px;
  padding: 1.5rem;
}

.config-group {
  margin-bottom: 1.9rem;
  text-align: left;
}

.weekly-progress-panel {
  background: linear-gradient(180deg, #ffffff 0%, #f8f6f1 100%);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.5rem;
  box-shadow: 0 8px 24px rgba(0,0,0,0.05);
  position: sticky;
  top: 28px;
}

.weekly-progress-head {
  margin-bottom: 0.8rem;
}

.weekly-progress-kicker {
  margin: 0 0 0.3rem;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-weight: 700;
}

.weekly-progress-head h3 {
  font-family: 'Fraunces', serif;
  font-size: 1.6rem;
  line-height: 1.1;
}

.weekly-progress-percent-text {
  margin: 0 0 0.9rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #edf4fc;
  color: var(--accent);
  border-radius: 999px;
  padding: 8px 12px;
  font-weight: 700;
  font-size: 0.92rem;
}

.weekly-progress-bar {
  width: 100%;
  height: 10px;
  border-radius: 999px;
  background: #e7e2d8;
  overflow: hidden;
  margin-bottom: 1rem;
}

.weekly-progress-fill {
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, #1a5fa8 0%, #4f86c4 100%);
  border-radius: 999px;
  transition: width 0.3s ease;
}

.weekly-progress-main {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
}

.weekly-progress-sub {
  margin: 0 0 1.1rem;
  font-size: 0.92rem;
  color: var(--muted);
}

.btn-reset-progress {
  width: 100%;
  background: transparent;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem;
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
}

.btn-reset-progress:hover {
  background: var(--tag-bg);
  border-color: var(--muted);
}

.btn-reset-progress:disabled {
  opacity: 0.45;
  cursor: default;
}

.level-status {
  display: none;
  border-radius: 14px;
  padding: 12px 14px;
  margin-bottom: 1.2rem;
  font-size: 0.95rem;
  text-align: left;
}

.level-status.ready {
  display: block;
  background: var(--green-light, #e8f0ea);
  border: 1px solid #bfd6c6;
  color: var(--green);
}

.level-status.empty {
  display: block;
  background: var(--danger-light);
  border: 1px solid #f1b8b1;
  color: var(--danger);
}

.config-head {
  margin-bottom: 1rem;
}

.config-head h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.45rem;
}

.config-head p {
  margin: 0;
  font-size: 0.98rem;
  color: var(--muted);
}

.config-selector {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.config-chip {
  min-width: 148px;
  min-height: 72px;
  padding: 16px 22px;
  border: 1.5px solid var(--border);
  border-radius: 20px;
  background: linear-gradient(180deg, #fbfaf7 0%, #f3efe8 100%);
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text);
  transition: all 0.18s ease;
  box-shadow: 0 8px 20px rgba(0,0,0,0.04);
}

.config-chip:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--accent);
  transform: translateY(-1px);
}

.config-chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 12px 28px rgba(26,95,168,0.22);
}

#level-selector .config-chip {
  min-width: 170px;
  min-height: 86px;
  font-size: 1.22rem;
}

.palabras-selector label {
  display: block;
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 1rem;
  color: var(--text);
}

.palabras-selector label span {
  font-family: 'Fraunces', serif;
  font-size: 1.6rem;
  color: var(--accent);
  font-weight: 600;
  display: block;
  margin-top: 2px;
}

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

.slider-min, .slider-max {
  font-size: 0.85rem;
  color: var(--muted);
  min-width: 24px;
  text-align: center;
}

input[type=range] {
  -webkit-appearance: none;
  flex: 1;
  height: 5px;
  background: var(--border);
  border-radius: 3px;
  outline: none;
}

input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(26,95,168,0.3);
  transition: transform 0.15s;
}

input[type=range]::-webkit-slider-thumb:hover { transform: scale(1.15); }

#screen-content,
#screen-activity,
#screen-ejercicio,
#screen-resultado,
#loading,
.error-msg,
.progreso-guardado {
  display: none;
}

#screen-ejercicio.question-enter {
  animation: questionEnter 0.34s ease both;
}

@keyframes questionEnter {
  from {
    opacity: 0;
    transform: translateX(18px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.progreso {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 2.1rem;
}

.progreso-bar {
  display: none;
  flex: 1;
  height: var(--progress-h);
  background: var(--border);
  border-radius: 3px;
  margin: 0 14px;
  overflow: hidden;
}

.progreso-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 3px;
  transition: width 0.4s ease;
}

.progreso-num {
  font-size: 0.9rem;
  color: var(--muted);
  font-weight: 500;
  min-width: 28px;
  text-align: center;
}

.progreso-dots {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(18px, 1fr));
  gap: 8px;
}

.progreso-dot {
  height: 12px;
  border-radius: 999px;
  background: #e5dfd4;
  border: 1px solid #d7d0c4;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.progreso-dot.done {
  background: #b9d7c2;
  border-color: #8dbc9c;
}

.progreso-dot.active {
  background: var(--accent);
  border-color: var(--accent);
  transform: scaleY(1.35);
}

.tipo-badge {
  display: inline-block;
  background: var(--accent-light);
  color: var(--accent);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 1.4rem;
}

.pregunta {
  font-family: 'Fraunces', serif;
  font-size: clamp(2.6rem, 7vw, 4.4rem);
  font-weight: 600;
  line-height: 1.25;
  margin: 0.4rem 0 0.75rem;
  text-align: center;
}

.pregunta-sub {
  font-size: 1.05rem;
  color: var(--muted);
  margin-bottom: 2.4rem;
  text-align: center;
}

.respuesta-feedback {
  display: none;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 1600;
  min-width: 220px;
  min-height: 0;
  margin: 0;
  padding: 24px 38px;
  border-radius: 24px;
  text-align: center;
  font-size: clamp(2rem, 6vw, 3.4rem);
  line-height: 1;
  font-weight: 900;
  letter-spacing: 0.01em;
  box-shadow: 0 20px 50px rgba(0,0,0,0.18);
  pointer-events: none;
}

.respuesta-feedback.correcta {
  display: block;
  background: #e1f4e7;
  color: var(--green);
  border: 2px solid #8ec29c;
}

.respuesta-feedback.incorrecta {
  display: block;
  background: #ffe5e1;
  color: var(--danger);
  border: 2px solid #e49890;
}

.feedback-popup {
  animation: feedbackPop 2s ease both;
}

@keyframes feedbackPop {
  0% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.72);
  }
  18% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1.08);
  }
  70% {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
  100% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.96);
  }
}

.next-countdown {
  display: none;
  margin: -1.4rem 0 1.6rem;
  text-align: center;
  color: var(--accent);
  font-weight: 800;
  letter-spacing: 0.01em;
}

.next-countdown.visible {
  display: block;
}

.translation-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: -1.2rem auto 1.2rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
  color: var(--accent);
  padding: 8px 13px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
}

.translation-panel {
  display: none;
  max-width: 460px;
  margin: -0.6rem auto 1.4rem;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: #fff;
  color: var(--muted);
  text-align: center;
}

.translation-panel.visible {
  display: block;
}

.opciones {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 2rem;
}

.opciones.tres { grid-template-columns: repeat(3, 1fr); }

.flashcard {
  background: linear-gradient(180deg, #fbfaf7 0%, #f3efe8 100%);
  border: 1.5px solid var(--border);
  border-radius: 20px;
  padding: 2rem 1.5rem;
  min-height: 220px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  margin-bottom: 1rem;
  box-shadow: 0 12px 28px rgba(0,0,0,0.05);
}

.flashcard.revealed {
  background: linear-gradient(180deg, #edf4fc 0%, #e3eefb 100%);
  border-color: var(--accent);
}

.flashcard-face {
  width: 100%;
}

.flashcard-front {
  font-family: 'Fraunces', serif;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  color: var(--text);
}

.flashcard-back {
  display: none;
  margin-top: 0.9rem;
  font-size: 1.25rem;
  color: var(--accent);
  font-weight: 600;
}

.flashcard.revealed .flashcard-back {
  display: block;
}

.flashcard-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 1.8rem;
}

.flashcard-btn {
  width: 100%;
}

.opcion-btn {
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 18px;
  padding: 18px 16px;
  font-family: 'DM Sans', sans-serif;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all 0.15s;
  color: var(--text);
  text-align: center;
  line-height: 1.4;
  min-height: 72px;
  box-shadow: 0 8px 22px rgba(0,0,0,0.04);
}

.opcion-btn:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.opcion-btn.seleccionada {
  background: var(--accent-light);
  border-color: var(--accent);
  font-weight: 500;
  color: var(--accent);
}

.opcion-btn.resultado-correcta {
  background: #dff1e5 !important;
  border-color: #2d5a3d !important;
  color: #1f4a2e !important;
  font-weight: 700;
  box-shadow: inset 0 0 0 999px rgba(223,241,229,0.2), 0 12px 26px rgba(45,90,61,0.16);
}

.opcion-btn.resultado-incorrecta {
  background: #f8b7af !important;
  border-color: #c0392b !important;
  color: #7a2118 !important;
  font-weight: 700;
  box-shadow: inset 0 0 0 999px rgba(248,183,175,0.22), 0 12px 26px rgba(192,57,43,0.15);
}

.opcion-btn.resultado-incorrecta-suave {
  background: #fff0ee !important;
  border-color: #f0c4be !important;
  color: #8a514b !important;
}

.opcion-btn:disabled {
  cursor: default;
  opacity: 1;
}

.opcion-btn.articulo-der {
  background: #dcecff !important;
  border-color: #87b0e4 !important;
  color: #1a5fa8 !important;
  min-height: 96px;
}

.opcion-btn.articulo-die {
  background: #ffe4f0 !important;
  border-color: #e5a9c3 !important;
  color: #c04c7d !important;
  min-height: 96px;
}

.opcion-btn.articulo-das {
  background: #ddf4e4 !important;
  border-color: #9fcdab !important;
  color: #2d8a47 !important;
  min-height: 96px;
}

.opcion-btn.articulo-der:hover,
.opcion-btn.articulo-die:hover,
.opcion-btn.articulo-das:hover {
  transform: translateY(-1px);
}

.opcion-btn.articulo-der.resultado-correcta,
.opcion-btn.articulo-die.resultado-correcta,
.opcion-btn.articulo-das.resultado-correcta {
  background: #dff1e5 !important;
  border-color: #2d5a3d !important;
  color: #1f4a2e !important;
}

.opcion-btn.articulo-correcta-destacada {
  min-height: 132px;
}

.opcion-btn.articulo-correcta-destacada .opcion-contenido {
  font-size: 3.3rem;
  line-height: 1;
  font-weight: 900;
}

.opcion-btn.articulo-der.resultado-incorrecta-suave,
.opcion-btn.articulo-die.resultado-incorrecta-suave,
.opcion-btn.articulo-das.resultado-incorrecta-suave {
  background: #fff0ee !important;
  border-color: #f0c4be !important;
  color: #8a514b !important;
}

.opcion-btn.articulo-der.resultado-incorrecta,
.opcion-btn.articulo-die.resultado-incorrecta,
.opcion-btn.articulo-das.resultado-incorrecta {
  background: #f8b7af !important;
  border-color: #c0392b !important;
  color: #7a2118 !important;
}

.opcion-contenido {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
}

.ayuda-icono {
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--muted);
}

.tooltip-traduccion {
  display: none;
  font-size: 0.8rem;
  color: var(--muted);
  margin-left: 4px;
}

.input-wrap { margin-bottom: 1.8rem; }

.input-wrap input {
  width: 100%;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  font-family: 'DM Sans', sans-serif;
  font-size: 1.05rem;
  background: var(--bg);
  color: var(--text);
  outline: none;
  transition: border-color 0.15s;
}

.input-wrap input:focus { border-color: var(--accent); }

.orden-label {
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 6px;
}

.palabras-banco,
.orden-construccion {
  min-height: 48px;
  padding: 10px;
  border-radius: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.palabras-banco {
  margin-bottom: 1rem;
  background: var(--bg);
  border: 1.5px dashed var(--border);
}

.orden-construccion {
  background: var(--accent-light);
  border: 1.5px solid var(--accent);
  margin-bottom: 1.8rem;
}

.orden-construccion.orden-correcta {
  background: #dff1e5;
  border-color: #2d5a3d;
}

.orden-construccion.orden-incorrecta {
  background: #f8b7af;
  border-color: #c0392b;
}

.palabra-chip {
  background: var(--card);
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 7px 14px;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.15s;
  user-select: none;
}

.palabra-chip:hover {
  background: var(--accent-light);
  border-color: var(--accent);
}

.palabra-chip.usada { opacity: 0.3; pointer-events: none; }

.orden-construccion .palabra-chip:hover {
  background: var(--danger-light);
  border-color: var(--danger);
}

.nav-btns {
  display: flex;
  gap: 10px;
  align-items: center;
}

.btn-back,
.btn-main,
.btn-main-solo,
.btn-modal-secondary,
.btn-terminar,
.btn-continue {
  font-family: 'DM Sans', sans-serif;
  border-radius: 12px;
  transition: all 0.15s;
  cursor: pointer;
}

.btn-back {
  background: var(--bg);
  border: 1.5px solid var(--border);
  padding: 13px 18px;
  font-size: 1rem;
  color: var(--muted);
  flex-shrink: 0;
}

.btn-back:hover {
  background: var(--tag-bg);
  border-color: var(--muted);
  color: var(--text);
}

.btn-main,
.btn-main-solo,
.btn-continue {
  background: var(--accent);
  color: #fff;
  border: none;
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.2px;
}

.btn-main { flex: 1; padding: 15px; }
.btn-main-solo,
.btn-continue { width: 100%; padding: 15px; }

.btn-main:hover,
.btn-main-solo:hover,
.btn-continue:hover { background: var(--accent-hover); }

.btn-main:disabled,
.btn-main-solo:disabled,
.btn-back:disabled {
  opacity: 0.4;
  cursor: default;
}

.puntuacion-grande {
  font-family: 'Fraunces', serif;
  font-size: 5rem;
  color: var(--accent);
  line-height: 1;
  margin: 1rem 0 0.4rem;
}

.puntuacion-label {
  font-size: 1rem;
  color: var(--muted);
  margin-bottom: 2rem;
}

.result-stats {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin: 0 0 1.5rem;
}

.result-stats span {
  background: var(--tag-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 9px 14px;
  font-weight: 700;
}

.resumen-lista {
  text-align: left;
  margin-bottom: 1rem;
  max-height: 280px;
  overflow-y: auto;
}

.resumen-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
  line-height: 1.4;
}

.resumen-item:last-child { border-bottom: none; }
.resumen-icon { font-size: 1rem; flex-shrink: 0; margin-top: 1px; }
.resumen-pregunta { color: var(--muted); }
.resumen-correcta { color: var(--green); font-weight: 500; }
.resumen-tuya { color: var(--danger); }

.loading-flag {
  font-size: 3.5rem;
  animation: floatFlag 1.8s ease-in-out infinite;
  display: block;
  margin-bottom: 1.2rem;
}

.loading-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 1rem;
}

.loading-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  animation: dotPulse 1.4s ease-in-out infinite;
}

.loading-dot:nth-child(2) { animation-delay: 0.2s; }
.loading-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes dotPulse {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

.loading-words {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 1.2rem 0;
}

.loading-word {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--tag-bg);
  border-radius: 10px;
  padding: 8px 14px;
  font-size: 0.95rem;
  opacity: 0;
  transform: translateX(-10px);
  animation: wordSlide 0.4s ease forwards;
}

.loading-word:nth-child(1) { animation-delay: 0.1s; }
.loading-word:nth-child(2) { animation-delay: 0.3s; }
.loading-word:nth-child(3) { animation-delay: 0.5s; }
.loading-word:nth-child(4) { animation-delay: 0.7s; }

@keyframes wordSlide {
  to { opacity: 1; transform: translateX(0); }
}

.loading-word .de { font-weight: 500; color: var(--text); }
.loading-word .es { color: var(--muted); font-size: 0.85rem; }
.loading-text { font-size: 0.9rem; color: var(--muted); margin-top: 0.5rem; }

.btn-terminar {
  width: 100%;
  background: transparent;
  border: 1.5px solid var(--border);
  padding: 11px;
  font-size: 0.9rem;
  color: var(--muted);
  margin-top: 10px;
}

.btn-terminar:hover {
  border-color: var(--danger);
  color: var(--danger);
  background: var(--danger-light);
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  backdrop-filter: blur(4px);
  opacity: 0;
  animation: fadeIn 0.2s ease forwards;
}

@keyframes fadeIn { to { opacity: 1; } }

.modal-box {
  background: var(--card);
  border-radius: 20px;
  padding: 2rem;
  max-width: 380px;
  width: 90%;
  text-align: center;
  box-shadow: 0 8px 40px rgba(0,0,0,0.15);
  transform: translateY(20px);
  animation: slideUp 0.2s ease forwards;
}

@keyframes slideUp { to { transform: translateY(0); } }

.modal-emoji { font-size: 3rem; margin-bottom: 0.8rem; display: block; }

.modal-box h3 {
  font-family: 'Fraunces', serif;
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
}

.modal-box p {
  color: var(--muted);
  font-size: 1rem;
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.modal-box p strong {
  color: var(--accent);
  font-weight: 600;
}

.modal-btns {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btn-modal-secondary {
  background: var(--bg);
  border: 1.5px solid var(--border);
  padding: 13px;
  font-size: 1rem;
  color: var(--text);
}

.btn-modal-secondary:hover {
  border-color: var(--muted);
  background: var(--tag-bg);
}

.error-msg {
  background: var(--danger-light);
  border: 1px solid #f5c6c2;
  border-radius: 12px;
  padding: 14px 18px;
  font-size: 0.95rem;
  color: var(--danger);
  margin-bottom: 1rem;
}

.progreso-guardado {
  background: var(--accent-light);
  border: 1px solid var(--accent);
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 0.95rem;
  color: var(--accent);
  margin-bottom: 1.5rem;
  text-align: left;
  cursor: pointer;
}

.progreso-guardado strong { font-weight: 600; }
.start-info { font-size: 0.9rem; color: var(--accent); margin-bottom: 1rem; }
.result-actions { display: grid; gap: 10px; }
.content-card {
  text-align: left;
  background: linear-gradient(180deg, #fbfaf7 0%, #f5f1ea 100%);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.content-kicker {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.8rem;
}

.content-actions {
  display: grid;
  gap: 10px;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  font-family: 'DM Sans', sans-serif;
  font-size: 1rem;
  color: var(--text);
  text-decoration: none;
  transition: all 0.15s;
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-light);
}

.activity-subtitle {
  margin-bottom: 1.2rem;
}

.modo-hint {
  min-height: 24px;
  font-size: 0.92rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
}

.section-back {
  margin-top: 0.8rem;
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .site-logo-link {
    top: 18px !important;
    right: 18px !important;
    left: auto !important;
  }
  .site-logo {
    width: 160px;
    max-height: none;
  }
  .activity-layout {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .weekly-progress-panel {
    position: static;
    padding: 1.2rem;
  }
  .card { padding: 1.4rem; border-radius: 18px; max-width: 600px; }
  .pregunta { font-size: 1.7rem; }
  .opciones,
  .opciones.tres { grid-template-columns: 1fr; }
  .nav-btns { flex-direction: column; }
  .btn-back,
  .btn-main { width: 100%; }
}

@media (min-width: 1024px) {
  .card {
    padding: 3rem;
  }

  #screen-activity h2 {
    font-size: 2.2rem;
  }

  .activity-subtitle {
    margin-bottom: 1.6rem;
  }

  .config-selector {
    gap: 16px;
  }

  .config-chip {
    min-width: 160px;
    min-height: 78px;
  }

  .palabras-selector {
    padding: 1.75rem;
  }
}