.grammar-practice-launch {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.35rem clamp(1.5rem, 4vw, 2.5rem);
  border-top: 1px solid var(--line);
  background: var(--paper-light);
}

.grammar-practice-launch p {
  flex: 1 1 15rem;
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.practice-button,
.practice-hint-toggle,
.practice-option {
  min-height: 44px;
  font-family: var(--sans);
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.practice-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
  padding: 0.7rem 1.35rem;
  border: 1px solid var(--accent-deep);
  border-radius: 999px;
  color: var(--theme-on-accent, #fff);
  background: var(--accent-deep);
  font-size: 0.95rem;
  font-weight: 700;
  line-height: 1.4;
  transition: box-shadow 180ms ease, transform 180ms ease;
}

.practice-button:hover {
  box-shadow: 0 4px 12px rgba(32, 51, 46, 0.18);
  transform: translateY(-1px);
}

.practice-button:active {
  transform: translateY(0);
}

.grammar-practice-launch :focus-visible,
.grammar-practice :focus-visible {
  outline: 3px solid var(--theme-focus, var(--vermilion-deep));
  outline-offset: 3px;
}

.grammar-practice-launch[hidden],
.grammar-practice[hidden],
.grammar-practice [hidden] {
  display: none !important;
}

.grammar-practice {
  padding: clamp(1.25rem, 4vw, 2.5rem);
  border-top: 1px solid var(--line);
  background: var(--paper-light);
  scroll-margin-top: 1.5rem;
}

.practice-header {
  max-width: 38rem;
}

.practice-kicker {
  margin: 0 0 0.4rem;
  color: var(--vermilion-deep);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.practice-header h3,
.practice-completion h3 {
  margin: 0;
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(1.75rem, 4vw, 2.3rem);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1.3;
}

.practice-intro {
  margin: 0.6rem 0 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.practice-progress {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin: 1.5rem 0;
}

.practice-progress__label {
  margin: 0;
  color: var(--accent-deep);
  font-size: 0.8rem;
  font-weight: 700;
}

.practice-progress progress {
  flex: 1 1 8rem;
  width: 100%;
  height: 0.5rem;
  overflow: hidden;
  appearance: none;
  border: 0;
  border-radius: 999px;
  color: var(--accent-deep);
  background: var(--theme-border, var(--line));
}

.practice-progress progress::-webkit-progress-bar {
  border-radius: 999px;
  background: var(--theme-border, var(--line));
}

.practice-progress progress::-webkit-progress-value {
  border-radius: 999px;
  background: var(--accent-deep);
}

.practice-progress progress::-moz-progress-bar {
  border-radius: 999px;
  background: var(--accent-deep);
}

.practice-questions {
  display: grid;
  gap: 1rem;
}

.practice-question {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.65fr) minmax(0, 1.5fr);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-medium);
  background: var(--card);
  transition: border-color 180ms ease;
}

.practice-question.is-complete {
  border-color: var(--accent-deep);
}

.practice-question__picture {
  align-self: center;
  overflow: hidden;
  margin: 1.25rem 0 1.25rem 1.25rem;
  border-radius: 0.8rem;
  background: var(--theme-green-soft, #e8eee5);
}

.practice-question__picture img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.practice-question__content {
  min-width: 0;
  padding: 1.25rem;
}

.practice-question__topline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.25rem 0.75rem;
  margin: -0.35rem 0 0.3rem;
}

.practice-question__number {
  margin: 0;
  color: var(--accent-deep);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.practice-hint-toggle {
  padding: 0.45rem 0.65rem;
  border: 1px solid transparent;
  border-radius: 0.6rem;
  color: var(--vermilion-deep);
  background: transparent;
  font-size: 0.8rem;
  font-weight: 700;
  line-height: 1.4;
}

.practice-hint-toggle:hover,
.practice-hint-toggle[aria-expanded="true"] {
  background: var(--theme-red-soft, #f2e1da);
}

.practice-question__title {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1.6;
}

.practice-question__sentence {
  margin: 0.7rem 0 1rem;
  font-family: var(--serif);
  font-size: clamp(1.15rem, 2.8vw, 1.35rem);
  font-weight: 500;
  line-height: 1.9;
  overflow-wrap: anywhere;
}

.practice-blank {
  display: inline-block;
  min-width: 3.25rem;
  margin-inline: 0.2rem;
  padding-inline: 0.25rem;
  border-bottom: 2px dashed var(--vermilion-deep);
  color: var(--vermilion-deep);
  text-align: center;
}

.practice-hint {
  margin: 0 0 1rem;
  padding: 0.75rem 0.9rem;
  border-left: 3px solid var(--vermilion-deep);
  border-radius: 0 0.6rem 0.6rem 0;
  color: var(--ink);
  background: var(--theme-red-soft, #f2e1da);
  font-size: 0.85rem;
  line-height: 1.7;
}

.practice-options {
  display: grid;
  gap: 0.5rem;
}

.practice-option {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  color: var(--ink);
  background: var(--card);
  font-size: 1rem;
  line-height: 1.5;
  text-align: left;
  overflow-wrap: anywhere;
  transition: background 180ms ease, border-color 180ms ease;
}

.practice-option__letter {
  display: inline-grid;
  flex: 0 0 1.65rem;
  width: 1.65rem;
  height: 1.65rem;
  place-items: center;
  border-radius: 50%;
  color: var(--ink-soft);
  background: var(--paper-light);
  font-size: 0.7rem;
  font-weight: 800;
}

.practice-option:hover:not([aria-disabled="true"]) {
  border-color: var(--accent-deep);
  background: var(--theme-green-soft, #e8eee5);
}

.practice-option.is-incorrect {
  border-color: var(--vermilion-deep);
  background: var(--theme-red-soft, #f2e1da);
}

.practice-option.is-correct {
  border-color: var(--accent-deep);
  background: var(--theme-green-soft, #e8eee5);
  box-shadow: inset 0 0 0 1px var(--accent-deep);
}

.practice-option.is-correct .practice-option__letter {
  color: var(--theme-on-accent, #fff);
  background: var(--accent-deep);
}

.practice-option[aria-disabled="true"] {
  cursor: default;
}

.practice-feedback {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  min-height: 1.5rem;
  margin: 0.85rem 0 0;
  color: var(--vermilion-deep);
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.7;
}

.is-complete .practice-feedback {
  color: var(--accent-deep);
}

.practice-feedback__icon {
  display: inline-grid;
  flex: 0 0 1.5rem;
  height: 1.5rem;
  place-items: center;
  border-radius: 50%;
  color: var(--theme-on-accent, #fff);
  background: var(--accent-deep);
  line-height: 1;
}

.practice-completion {
  position: relative;
  overflow: hidden;
  margin-top: 1.5rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--accent-deep);
  border-radius: var(--radius-medium);
  background: var(--theme-green-soft, #e8eee5);
  text-align: center;
}

.practice-completion > :not(.practice-confetti) {
  position: relative;
  z-index: 1;
}

.practice-completion__badge {
  display: inline-grid;
  width: 3.75rem;
  height: 3.75rem;
  margin-bottom: 1rem;
  place-items: center;
  border: 1px solid var(--theme-gold, #896823);
  border-radius: 50%;
  color: var(--theme-gold, #896823);
  background: var(--card);
  font-size: 2rem;
  line-height: 1;
}

.practice-completion > p:not(.practice-kicker) {
  max-width: 31rem;
  margin: 0.75rem auto 1.25rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.practice-sparkles,
.practice-confetti {
  position: absolute;
  z-index: 2;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.practice-sparkles span,
.practice-confetti span {
  position: absolute;
  width: 0.45rem;
  height: 0.7rem;
  border-radius: 2px;
  opacity: 0;
  background: var(--accent-deep);
}

.practice-sparkles span {
  top: 72%;
  left: 70%;
  --piece-x: -3rem;
  --piece-y: -5rem;
}

.practice-confetti span {
  top: -1rem;
  left: calc(4% + var(--piece-index, 0) * 4.8%);
}

.practice-sparkles span:nth-child(6n + 1) { --piece-x: -5rem; --piece-y: -3rem; }
.practice-sparkles span:nth-child(6n + 2) { --piece-x: -3rem; --piece-y: -5rem; }
.practice-sparkles span:nth-child(6n + 3) { --piece-x: -1rem; --piece-y: -6rem; }
.practice-sparkles span:nth-child(6n + 4) { --piece-x: 2rem; --piece-y: -5rem; }
.practice-sparkles span:nth-child(6n + 5) { --piece-x: 4rem; --piece-y: -4rem; }
.practice-sparkles span:nth-child(6n + 6) { --piece-x: 5rem; --piece-y: -2rem; }

:is(.practice-sparkles, .practice-confetti) span:nth-child(3n + 2) {
  background: var(--vermilion-deep);
}

:is(.practice-sparkles, .practice-confetti) span:nth-child(3n) {
  border-radius: 50%;
  background: var(--theme-gold, #896823);
}

.practice-question.is-celebrating .practice-sparkles span {
  animation: practice-sparkle 850ms ease-out both;
  animation-delay: calc(var(--piece-index, 0) * 25ms);
}

.practice-question.is-celebrating .practice-feedback__icon {
  animation: practice-cheer 550ms ease-out both;
}

.practice-completion.is-celebrating .practice-confetti span {
  animation: practice-confetti-fall 1800ms ease-in both;
  animation-delay: calc(var(--piece-index, 0) * 40ms);
}

.practice-completion.is-celebrating .practice-completion__badge {
  animation: practice-cheer 700ms ease-out both;
}

@keyframes practice-sparkle {
  0% { opacity: 0; transform: translate(0, 0) scale(0.4) rotate(0deg); }
  15% { opacity: 1; }
  100% { opacity: 0; transform: translate(var(--piece-x), var(--piece-y)) scale(0.8) rotate(220deg); }
}

@keyframes practice-cheer {
  0% { transform: scale(0.7) rotate(-12deg); }
  55% { transform: scale(1.15) rotate(7deg); }
  100% { transform: scale(1) rotate(0deg); }
}

@keyframes practice-confetti-fall {
  0% { opacity: 0; transform: translateY(0) rotate(0deg); }
  10% { opacity: 1; }
  85% { opacity: 0.9; }
  100% { opacity: 0; transform: translateY(24rem) rotate(420deg); }
}

@media (max-width: 38rem) {
  .practice-question {
    grid-template-columns: minmax(0, 1fr);
  }

  .practice-question__picture {
    width: auto;
    margin: 1rem 1rem 0;
  }

  .practice-question__picture img {
    aspect-ratio: 3 / 2;
  }

  .practice-question__content {
    padding: 1rem;
  }
}

@media (max-width: 25rem) {
  .grammar-practice-launch .practice-button {
    width: 100%;
  }

  .grammar-practice {
    padding-inline: 0.85rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .grammar-practice-launch *,
  .grammar-practice * {
    animation: none !important;
    transition: none !important;
  }

  .practice-sparkles,
  .practice-confetti {
    display: none;
  }

  .practice-button:hover {
    transform: none;
  }
}

@media print {
  .grammar-practice-launch,
  .grammar-practice {
    display: none !important;
  }
}