/* Kana Practice — design system de 2DATO (tokens de marca) */

:root {
  --navy: #0e1c32;
  --navy-75: #465164;
  --navy-55: #5e6b7a;
  --navy-35: #a3abb5;
  --navy-15: #d5d9de;
  --green: #06aa78;
  --green-dark: #057a56;
  --green-75: #44bf9a;
  --green-55: #6ecfb3;
  --green-35: #a3e0ce;
  --green-15: #d5f2e9;
  --paper: #fafaf7;
  --paper-2: #f3f1ea;
  --ink: #0e1c32;
  --error: #b42318;
  --error-15: #fbe4e1;

  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
  --font-jp: 'Noto Sans JP', sans-serif;
}

* {
  box-sizing: border-box;
}

/* Que ningún display de componente anule el atributo hidden. */
[hidden] {
  display: none !important;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.5;
}

h1, h2, h3 {
  font-family: var(--font-display);
  margin: 0;
}

a {
  color: var(--green-dark);
}

button {
  font-family: inherit;
}

:focus-visible {
  outline: 2px solid var(--green-dark);
  outline-offset: 2px;
}

/* --- primitivas de marca --- */

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--navy-55);
  margin: 0 0 12px;
}

.eyebrow::before {
  content: '';
  width: 16px;
  height: 1.5px;
  background: var(--green);
  display: inline-block;
}

.punto {
  display: inline-block;
  width: 0.4em;
  height: 0.4em;
  border-radius: 50%;
  background: var(--green);
  margin-left: 0.15em;
}

.grid-bg {
  background-image:
    linear-gradient(to right, var(--navy-15) 1px, transparent 1px),
    linear-gradient(to bottom, var(--navy-15) 1px, transparent 1px);
  background-size: 48px 48px;
}

.cap-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--green-dark);
  margin-right: 6px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 999px;
  padding: 12px 22px;
  font-size: 14px;
  font-weight: 500;
  border: 1.5px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 150ms cubic-bezier(0.16, 1, 0.3, 1), box-shadow 150ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

.btn-primary {
  background: var(--green);
  color: var(--navy);
  border-color: var(--green);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(6, 170, 120, 0.25);
}

.btn-ghost {
  background: transparent;
  color: var(--navy);
  border-color: var(--navy-15);
}

.btn-ghost:hover {
  border-color: var(--navy-35);
}

.btn-ghost[aria-pressed='true'] {
  background: var(--green-15);
  border-color: var(--green);
  color: var(--navy);
}

/* --- layout general --- */

.site-header {
  padding: clamp(1.5rem, 2.5vw, 2.5rem) 16px;
}

.site-header__inner {
  max-width: 1240px;
  margin: 0 auto;
}

.site-header__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.site-title {
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--navy);
}

.lede {
  max-width: 60ch;
  color: var(--navy-75);
  font-size: 1.05rem;
}

.layout {
  max-width: 1240px;
  margin: 0 auto;
  padding: 24px 16px 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

/* Barra superior: modo (01) + silabario (02) en una sola tarjeta, dos columnas
   en escritorio con separador vertical sutil. */
.top-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

@media (min-width: 1024px) {
  .top-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  }

  .top-col--syllabary {
    margin-left: -16px;
    padding-left: 16px;
    border-left: 1px solid var(--navy-15);
  }
}

.panel {
  background: #fff;
  border: 1px solid var(--navy-15);
  border-radius: 20px;
  padding: 36px 32px;
}

.panel h2 {
  font-size: 1.15rem;
  margin-bottom: 20px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
}

.field-label {
  font-weight: 500;
}

.field-hint {
  margin: 0;
  font-size: 0.8rem;
  color: var(--navy-55);
}

label {
  font-size: 0.9rem;
  color: var(--navy-75);
}

textarea,
input[type='text'] {
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 12px 14px;
  border: 1.5px solid var(--navy-15);
  border-radius: 12px;
  background: var(--paper);
  color: var(--ink);
  resize: vertical;
}

textarea:focus,
input[type='text']:focus {
  border-color: var(--green);
}

.segmented {
  display: inline-flex;
  border: 1.5px solid var(--navy-15);
  border-radius: 999px;
  padding: 4px;
  gap: 4px;
}

.segmented__option {
  position: relative;
  border-radius: 999px;
  padding: 8px 18px;
  font-size: 0.9rem;
  cursor: pointer;
  color: var(--navy-75);
}

.segmented__option input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}

.segmented__option.is-checked {
  background: var(--navy);
  color: #fff;
}

.segmented__option input:focus-visible + span {
  outline: 2px solid var(--green-dark);
  outline-offset: 2px;
}

/* Variante de segmented para pestañas (botones role=tab en vez de radios). */
.segmented__option--tab {
  background: transparent;
  border: none;
  font-family: inherit;
}

/* Mismo estado seleccionado que .segmented__option (navy + blanco): el verde queda
   reservado para las acciones principales (Nueva ronda, Generar, Corregir). */
.segmented__option--tab.is-checked {
  background: var(--navy);
  color: #fff;
}

.mode-tabs {
  display: flex;
  width: 100%;
}

.mode-tabs .segmented__option--tab {
  flex: 1;
  text-align: center;
}

.mode-panel {
  margin-top: 20px;
}

.mode-panel .field-hint {
  margin: 0 0 12px;
}

.row-filter {
  margin-top: 24px;
  border-top: 1px solid var(--navy-15);
  padding-top: 16px;
}

.row-filter summary {
  cursor: pointer;
  font-weight: 500;
  color: var(--navy);
}

.chip-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 999px;
  border: 1.5px solid var(--navy-15);
  background: transparent;
  padding: 6px 14px;
  font-family: var(--font-jp);
  font-size: 0.95rem;
  color: var(--navy-75);
  cursor: pointer;
}

.chip[aria-pressed='true'] {
  background: var(--green-15);
  border-color: var(--green);
  color: var(--navy);
}

.chip__label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: inherit;
  text-transform: uppercase;
  opacity: 0.7;
}

.btn-generate {
  margin-top: 28px;
  width: 100%;
}

@media (min-width: 1024px) {
  .btn-generate {
    width: auto;
  }
}

/* --- práctica --- */

.practice-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}

@media (min-width: 1024px) {
  .practice-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 32px;
  }

  .answer-pane {
    position: sticky;
    top: 16px;
    align-self: start;
  }
}

.kana-output {
  position: relative;
  min-height: 120px;
  max-height: min(calc(100vh - 140px), 720px);
  overflow-y: auto;
  overscroll-behavior: contain;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 24px;
  background: var(--paper-2);
  border-radius: 16px;
}

@media (max-width: 1023px) {
  .kana-output {
    max-height: 42vh;
  }
}

/* Scrollbar delgada y discreta: indica que hay más contenido sin sombras extra. */
.kana-output {
  scrollbar-width: thin;
  scrollbar-color: var(--navy-35) transparent;
}

.kana-output::-webkit-scrollbar {
  width: 8px;
}

.kana-output::-webkit-scrollbar-thumb {
  background: var(--navy-35);
  border-radius: 999px;
}

/* Densidad compacta para textos largos (más de 24 unidades kana): celdas más pequeñas
   para que quepa más contenido antes de necesitar scroll interno. */
.kana-output.is-compact .kana-cell__kana {
  font-size: clamp(1.35rem, 2.6vw, 1.9rem);
}

.kana-output.is-compact .kana-cell {
  min-width: 2.2rem;
  padding: 4px 5px;
  border-radius: 8px;
}

.kana-output.is-compact .kana-word {
  gap: 4px;
}

.kana-output.is-compact .kana-line {
  gap: 10px 14px;
}

.kana-output__empty {
  color: var(--navy-55);
  margin: auto;
  font-size: 0.95rem;
}

.kana-word {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.kana-word-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.kana-line {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 20px;
}

.word-reveal {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--navy-55);
}

.kana-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  min-width: 3.2rem;
  padding: 6px 8px;
  border-radius: 10px;
  border: 1.5px solid transparent;
  background: #fff;
}

.kana-cell__kana {
  font-family: var(--font-jp);
  font-weight: 500;
  font-size: clamp(2rem, 6vw, 3.2rem);
  line-height: 1.1;
  color: var(--navy);
}

.kana-cell__romaji {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--navy-55);
  visibility: hidden;
}

.kana-cell__typed {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--error);
}

.kana-cell.is-dimmed {
  opacity: 0.35;
}

.kana-cell.is-ok {
  background: var(--green-15);
  border-color: var(--green);
}

.kana-cell.is-error {
  background: var(--error-15);
  border-color: var(--error);
}

/* Celda activa mientras se escribe: no revela si es correcta, solo marca posición. */
.kana-cell.is-current {
  border-color: var(--navy);
  border-width: 1.5px;
  box-shadow: inset 0 -3px 0 var(--green);
}

.kana-cell.is-error .kana-cell__romaji,
.kana-cell.is-error .kana-cell__typed {
  visibility: visible;
}

.kana-output.show-solution .kana-cell__romaji {
  visibility: visible;
}

.answer-form {
  margin-top: 4px;
}

#input-answer {
  max-height: 30vh;
}

@media (min-width: 1024px) {
  #input-answer {
    max-height: 50vh;
  }
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.score {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--navy);
  margin-top: 16px;
}

/* --- estadísticas --- */

.stats-panel {
  grid-column: 1 / -1;
}

.stats-panel__hint {
  color: var(--navy-55);
  font-size: 0.9rem;
  margin-top: -8px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  gap: 10px;
  margin: 20px 0;
}

.stats-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 12px 8px;
  border-radius: 12px;
  border: 1.5px solid var(--navy-15);
}

.stats-cell__kana {
  font-family: var(--font-jp);
  font-size: 1.6rem;
  color: var(--navy);
}

.stats-cell__rate {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--navy-55);
}

.stats-panel__empty {
  grid-column: 1 / -1;
  color: var(--navy-55);
  font-size: 0.9rem;
}

/* --- mensajes --- */

.message {
  margin-top: 16px;
  min-height: 1.4em;
  color: var(--navy-75);
  font-size: 0.9rem;
}

.message.is-warning {
  color: var(--error);
}

/* --- tutorial --- */

.tutorial-dialog {
  border: 1px solid var(--navy-15);
  border-radius: 20px;
  padding: 0;
  width: min(640px, calc(100% - 32px));
  max-width: calc(100% - 32px);
  max-height: min(80vh, 720px);
  background: #fff;
  color: var(--ink);
}

.tutorial-dialog[open] {
  display: flex;
  flex-direction: column;
}

.tutorial-dialog::backdrop {
  background: rgba(14, 28, 50, 0.6);
}

.tutorial-dialog__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px 28px 0;
}

.tutorial-tabs {
  display: flex;
  margin: 20px 28px 0;
  width: calc(100% - 56px);
}

.tutorial-tabs .segmented__option--tab {
  flex: 1;
  padding: 8px 10px;
  text-align: center;
}

.tutorial-panel {
  padding: 20px 28px 28px;
  overflow-y: auto;
  min-height: 0;
}

.tutorial-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.tutorial-step {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.tutorial-step p {
  margin: 4px 0 0;
  color: var(--navy-75);
  font-size: 0.92rem;
}

.tutorial-table-switch {
  margin-bottom: 16px;
}

.tutorial-table-wrap {
  overflow-x: auto;
}

.kana-table,
.rules-table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.88rem;
}

.kana-table th,
.kana-table td,
.rules-table th,
.rules-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--navy-15);
  text-align: left;
  white-space: nowrap;
}

.rules-table td:nth-child(1) {
  white-space: normal;
  color: var(--navy-75);
}

.kana-table th {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--navy-55);
  text-transform: uppercase;
}

.kana-table td {
  text-align: center;
}

.kana-table__kana,
.kana-table__romaji {
  display: block;
}

.kana-table__kana {
  font-family: var(--font-jp);
  font-size: 1.3rem;
  color: var(--navy);
}

.kana-table__romaji {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--navy-55);
}

/* --- footer --- */

.site-footer {
  max-width: 1240px;
  margin: 40px auto 0;
  padding: 24px 16px 40px;
  color: var(--navy-55);
  font-size: 0.85rem;
  border-top: 1px solid var(--navy-15);
}

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

/* --- minijuego de tarjetas (tarjetas.html) --- */

.cards-config-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

@media (min-width: 768px) {
  .cards-config-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.cards-config-col__title {
  font-size: 0.95rem;
  margin: 0 0 12px;
  color: var(--navy);
}

/* Estos grupos tienen más opciones que los de index.html y pueden partirse en dos líneas
   en pantallas angostas: con border-radius de píldora completa (.segmented) una segunda
   línea queda envuelta en una forma rara, así que aquí se usa un radio más discreto. */
.cards-config .segmented {
  flex-wrap: wrap;
  border-radius: 16px;
}

.cards-config .segmented__option {
  border-radius: 10px;
}

.cards-game {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.cards-game__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--navy-55);
}

.lives {
  font-size: 1.3rem;
  letter-spacing: 4px;
  color: var(--error);
}

.card-kana {
  font-family: var(--font-jp);
  font-weight: 500;
  font-size: 4.5rem;
  line-height: 1.1;
  color: var(--navy);
  margin: 32px 0;
}

@media (min-width: 768px) {
  .card-kana {
    font-size: 6rem;
  }
}

.card-form {
  width: 100%;
  max-width: 360px;
}

.card-form .field {
  align-items: center;
  text-align: center;
}

#card-input {
  width: 100%;
  text-align: center;
  font-size: 1.4rem;
}

.card-feedback {
  min-height: 1.4em;
  margin: 12px 0 0;
  font-weight: 500;
  color: var(--error);
}

.cards-summary {
  text-align: center;
}

.summary-correct {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--navy);
  margin: 4px 0;
}

.summary-block {
  margin-top: 20px;
  text-align: left;
}

.summary-block h3 {
  font-size: 0.9rem;
  color: var(--navy-55);
  margin: 0 0 8px;
}

.summary-block ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--navy-75);
}

.summary-record {
  margin-top: 20px;
  font-weight: 600;
  color: var(--green-dark);
}

.cards-summary .actions,
.cards-game .actions {
  justify-content: center;
  margin-top: 24px;
}