/* ------------ reset ------------ */

* {
  box-sizing: border-box;
}

html {
  font-size: 62.5%;
}

:root {
  --bg: #f5f7fb;
  --surface: rgba(255, 255, 255, 0.88);
  --surface-strong: #ffffff;
  --surface-muted: #eef2f7;
  --text: #162033;
  --text-soft: #5f6b7d;
  --border: #dce3ee;
  --shadow: 0 12px 40px rgba(15, 23, 42, 0.08);

  --color-correct: #2f8f58;
  --color-present: #d5a330;
  --color-absent: #8d99ab;
  --color-error: #bb3429;
  --color-brand: #355fcb;
  --color-brand-strong: #274ca9;

  --key-bg: #dbe3ef;
  --key-text: #162033;

  --overlay-bg: rgba(15, 23, 42, 0.4);
  --badge-bg: #eaf0ff;
  --badge-text: #274ca9;

  --font-family: Inter, Roboto, "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

body.dark-mode {
  --bg: #0f1726;
  --surface: rgba(17, 26, 42, 0.92);
  --surface-strong: #162033;
  --surface-muted: #1e2a3d;
  --text: #f5f7fb;
  --text-soft: #9ba8ba;
  --border: #28374d;
  --shadow: 0 16px 42px rgba(0, 0, 0, 0.33);

  --key-bg: #243246;
  --key-text: #f5f7fb;

  --overlay-bg: rgba(3, 6, 12, 0.62);
  --badge-bg: #1a2841;
  --badge-text: #9eb7ff;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top right, rgba(53, 95, 203, 0.12), transparent 30%),
    radial-gradient(circle at bottom left, rgba(47, 143, 88, 0.1), transparent 35%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-family);
  font-size: 1.6rem;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  width: min(1120px, calc(100% - 2.4rem));
  margin: 0 auto;
  padding: 2rem 0 3rem;
}

.app-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.6rem;
  padding: 1.6rem 0 2rem;
}

.eyebrow {
  margin: 0 0 0.6rem;
  color: var(--color-brand);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.title {
  margin: 0;
  font-size: clamp(3rem, 6vw, 4.6rem);
  line-height: 1.05;
}

.subtitle {
  max-width: 72rem;
  margin: 0.8rem 0 0;
  color: var(--text-soft);
  line-height: 1.5;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.version-badge {
  display: inline-flex;
  align-items: center;
  min-height: 3.4rem;
  padding: 0 1.2rem;
  border-radius: 999px;
  background: var(--badge-bg);
  color: var(--badge-text);
  font-size: 1.3rem;
  font-weight: 700;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 4rem;
  padding: 0 1rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow);
}

.theme-toggle__icon {
  font-size: 1.6rem;
}

body.dark-mode .theme-toggle__icon--moon,
body:not(.dark-mode) .theme-toggle__icon--sun {
  opacity: 1;
}

body.dark-mode .theme-toggle__icon--sun,
body:not(.dark-mode) .theme-toggle__icon--moon {
  opacity: 0.45;
}

.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.6rem;
}

.layout__main {
  display: grid;
  gap: 1.6rem;
}

.card {
  padding: 1.6rem;
  border: 1px solid var(--border);
  border-radius: 2rem;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.card__header {
  margin-bottom: 1.2rem;
}

.card__header h2,
.card__header h3 {
  margin: 0;
  font-size: 2rem;
}

.card__header p {
  margin: 0.4rem 0 0;
  color: var(--text-soft);
  line-height: 1.45;
}

.card__header--compact {
  margin-top: 1.4rem;
}

.setup-grid {
  display: grid;
  gap: 1.2rem;
}

.field {
  display: grid;
  gap: 0.6rem;
}

.field__label {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.field select {
  min-height: 4.6rem;
  padding: 0 1.2rem;
  border: 1px solid var(--border);
  border-radius: 1.2rem;
  background: var(--surface-strong);
  color: var(--text);
}

.field--checkbox {
  align-items: center;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  min-height: 4.6rem;
  padding: 0 1.2rem;
  border: 1px solid var(--border);
  border-radius: 1.2rem;
  background: var(--surface-strong);
}

.field--checkbox input {
  width: 1.8rem;
  height: 1.8rem;
  accent-color: var(--color-brand);
}

.setup-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.2rem;
  align-items: center;
  margin-top: 1.4rem;
}

.setup-note {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.4;
}

.button {
  min-height: 4.6rem;
  padding: 0 1.4rem;
  border: 1px solid var(--border);
  border-radius: 1.2rem;
  background: var(--surface-strong);
  color: var(--text);
  font-weight: 700;
}

.button:hover {
  filter: brightness(0.98);
}

.button--primary {
  border-color: var(--color-brand);
  background: var(--color-brand);
  color: #ffffff;
}

.button--primary:hover {
  background: var(--color-brand-strong);
}

.status-card__content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.2rem;
  align-items: center;
}

.status-card__label {
  margin: 0 0 0.4rem;
  color: var(--text-soft);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-card__summary {
  margin: 0;
  line-height: 1.45;
  font-weight: 600;
}

.status-card__actions {
  display: flex;
  gap: 0.8rem;
}

.hint-list {
  display: grid;
  gap: 1rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.hint-list__empty {
  padding: 1.2rem;
  border: 1px dashed var(--border);
  border-radius: 1.2rem;
  color: var(--text-soft);
  background: var(--surface-muted);
}

.hint-list__item {
  padding: 1.2rem;
  border-radius: 1.4rem;
  background: var(--surface-muted);
  border: 1px solid var(--border);
}

.hint-list__label {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--color-brand);
  font-size: 1.2rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hint-list__text {
  margin: 0;
  line-height: 1.5;
}

.game-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.4rem;
}

.space {
  height: 0.2rem;
}

.grid {
  display: grid;
  gap: 0.6rem;
  width: 100%;
  justify-content: center;
}

.grid__row {
  display: grid;
  gap: 0.6rem;
}

.grid__cell {
  display: flex;
  justify-content: center;
  align-items: center;
  width: clamp(4.1rem, 13vw, 6rem);
  aspect-ratio: 1 / 1;
  border-radius: 1.2rem;
  border: 2px solid var(--border);
  background: var(--surface-strong);
  color: var(--text);
  font-size: clamp(2rem, 7vw, 3rem);
  font-weight: 800;
  text-transform: uppercase;
  user-select: none;
  transition:
    transform 0.16s ease,
    background-color 0.18s ease,
    border-color 0.18s ease;
}

.grid__row--shake {
  animation: shake 0.15s 2;
}

.grid__cell--full {
  transform: scale(1.04);
  border-width: 3px;
}

.grid__cursor {
  border-color: var(--color-brand);
  box-shadow: 0 0 0 3px rgba(53, 95, 203, 0.18);
}

.grid__cell--correct {
  color: #ffffff;
  background: var(--color-correct);
  border-color: var(--color-correct);
}

.grid__cell--present {
  color: #ffffff;
  background: var(--color-present);
  border-color: var(--color-present);
}

.grid__cell--absent {
  color: #ffffff;
  background: var(--color-absent);
  border-color: var(--color-absent);
}

.grid__cell--correct,
.grid__cell--present,
.grid__cell--absent {
  animation: flip 0.45s ease;
}

.keyboard {
  display: grid;
  gap: 0.7rem;
  width: 100%;
  max-width: 64rem;
}

.keyboard__row {
  display: flex;
  gap: 0.6rem;
  justify-content: center;
}

.keyboard__key {
  min-width: 3rem;
  min-height: 5.4rem;
  padding: 0 0.9rem;
  border: 0;
  border-radius: 1rem;
  background: var(--key-bg);
  color: var(--key-text);
  font-size: 1.8rem;
  font-weight: 800;
  text-transform: uppercase;
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.06);
}

.keyboard__key--wide {
  min-width: 7rem;
  font-size: 1.4rem;
}

.keyboard__key--correct {
  background: var(--color-correct);
  color: #ffffff;
}

.keyboard__key--present {
  background: var(--color-present);
  color: #ffffff;
}

.keyboard__key--absent {
  background: var(--color-absent);
  color: #ffffff;
}

.error {
  position: fixed;
  top: 2rem;
  left: 50%;
  z-index: 980;
  width: min(40rem, calc(100% - 2.4rem));
  padding: 1.2rem 1.6rem;
  border-radius: 1.4rem;
  background: var(--color-error);
  color: #ffffff;
  text-align: center;
  font-weight: 700;
  transform: translateX(-50%);
  box-shadow: var(--shadow);
  animation: toast 2.6s ease forwards;
}

.overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 990;
  padding: 1.6rem;
  background: var(--overlay-bg);
  backdrop-filter: blur(10px);
}

.overlay--show {
  display: grid;
  place-items: center;
}

.result {
  width: min(72rem, 100%);
  max-height: min(90vh, 92rem);
  overflow-y: auto;
  padding: 2rem;
  border-radius: 2.4rem;
  background: var(--surface-strong);
  color: var(--text);
  box-shadow: var(--shadow);
}

.result__header {
  text-align: center;
}

.result__eyebrow {
  margin: 0 0 0.6rem;
  color: var(--color-brand);
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.result__title {
  margin: 0;
  font-size: clamp(2.8rem, 6vw, 4rem);
}

.result__text {
  margin: 1rem 0 0;
  color: var(--text-soft);
}

.result__word {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 16rem;
  min-height: 5.4rem;
  margin: 1.4rem auto 0;
  padding: 0 1.6rem;
  border-radius: 999px;
  background: var(--color-correct);
  color: #ffffff;
  font-size: 2.6rem;
  font-weight: 800;
  text-transform: uppercase;
}

.pedagogy-card {
  margin-top: 2rem;
  padding: 1.6rem;
  border: 1px solid var(--border);
  border-radius: 2rem;
  background: var(--surface);
}

.pedagogy-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.pedagogy-grid__item {
  display: grid;
  gap: 0.3rem;
  padding: 1rem 1.2rem;
  border-radius: 1.4rem;
  background: var(--surface-muted);
}

.pedagogy-grid__label {
  color: var(--text-soft);
  font-size: 1.2rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.pedagogy-block {
  margin-top: 1.4rem;
}

.pedagogy-block h3 {
  margin: 0 0 0.6rem;
  font-size: 1.6rem;
}

.pedagogy-block p {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.6;
}

.stats-section {
  margin-top: 2rem;
}

.stats__container {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.stats__element {
  display: grid;
  place-items: center;
  gap: 0.4rem;
  padding: 1.2rem;
  border-radius: 1.4rem;
  background: var(--surface);
  border: 1px solid var(--border);
}

.stats__number {
  font-size: 2.8rem;
  font-weight: 800;
}

.stats__desc {
  color: var(--text-soft);
  text-align: center;
}

.distribution__container {
  display: grid;
  gap: 0.8rem;
}

.distribution__row {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.distribution__number {
  width: 2rem;
  font-weight: 800;
}

.distribution__bar {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  min-width: 4rem;
  min-height: 2.8rem;
  padding: 0 0.8rem;
  border-radius: 999px;
  background: #5d77b6;
  color: #ffffff;
  font-weight: 800;
}

.distribution__bar--current {
  background: var(--color-correct);
}

.result__actions {
  display: flex;
  justify-content: center;
  margin-top: 2rem;
}

@keyframes flip {
  0% {
    transform: rotateX(0deg);
  }
  45% {
    transform: rotateX(90deg);
  }
  100% {
    transform: rotateX(0deg);
  }
}

@keyframes shake {
  0% {
    transform: translateX(0.2rem);
  }
  50% {
    transform: translateX(-0.2rem);
  }
  100% {
    transform: translateX(0.2rem);
  }
}

@keyframes toast {
  0% {
    opacity: 0;
    transform: translateX(-50%) translateY(-0.8rem);
  }
  12%,
  70% {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateX(-50%) translateY(-0.8rem);
  }
}

@media (min-width: 860px) {
  .layout {
    grid-template-columns: 34rem 1fr;
    align-items: start;
  }

  .setup-grid {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 620px) {
  .setup-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stats__container {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 619px) {
  .app-shell {
    width: min(100%, calc(100% - 1.6rem));
    padding-top: 1.2rem;
  }

  .app-header {
    flex-direction: column;
    align-items: stretch;
  }

  .header-actions {
    justify-content: space-between;
  }

  .grid__cell {
    width: clamp(4.2rem, 12.6vw, 5.2rem);
  }

  .keyboard__key {
    min-height: 4.8rem;
    padding: 0 0.6rem;
    font-size: 1.55rem;
  }

  .keyboard__key--wide {
    min-width: 6rem;
    font-size: 1.25rem;
  }

  .pedagogy-grid {
    grid-template-columns: 1fr;
  }

  .result {
    padding: 1.6rem;
  }
}