/**
 * styles/screens/sentence-mode.css
 * Gameplay screen for Sentence Mode.
 * All colors via CSS custom properties. Radius ≤ 4px. Touch targets ≥ 48px.
 * Content column matches main-menu / session-settings (420px → 460px desktop).
 */

.sentence-mode-screen {
  display: flex;
  flex-direction: column;
  align-items: center;          /* center the constrained column */
  min-height: 100%;
  padding: var(--space-md);
  background: var(--color-background);
  color: var(--color-text);
  gap: var(--space-md);
  box-sizing: border-box;
}

/* Shared constrained column for all direct children panels */
.sentence-mode-screen > .sentence-header,
.sentence-mode-screen > .sentence-prompt-panel,
.sentence-mode-screen > .sentence-input-panel,
.sentence-mode-screen > .sentence-actions,
.sentence-mode-screen > .result-panel,
.sentence-mode-screen > .sentence-loading,
.sentence-mode-screen > .sentence-error {
  width: 100%;
  max-width: 420px;
}

.sentence-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sentence-mode-label {
  font-family: var(--font-display);
  font-size: var(--font-size-sm);
  color: var(--color-secondary);
  letter-spacing: 1px;
}

.btn-exit {
  min-height: 48px;
  min-width: 64px;
  padding: 0 var(--space-sm);
  font-family: var(--font-display);
  font-size: var(--font-size-sm);
  border: 2px solid var(--color-text-muted);
  border-radius: var(--border-radius-md);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
}

.sentence-prompt-panel {
  background: var(--color-surface);
  border: 2px solid var(--color-text-muted);
  border-radius: var(--border-radius-md);
  padding: var(--space-md);
  box-sizing: border-box;
}

.prompt-label {
  font-family: var(--font-display);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
  text-align: center;
}

.prompt-text {
  font-family: var(--font-display);
  font-size: var(--font-size-md);
  line-height: 1.6;
  color: var(--color-text);
  white-space: pre-wrap;
  text-align: center;
}

.sentence-input-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.translation-input {
  width: 100%;
  min-height: 120px;
  padding: var(--space-md);
  font-family: var(--font-korean);
  font-size: 16px; /* prevent iOS zoom */
  line-height: 1.5;
  background: var(--color-surface);
  color: var(--color-text);
  border: 2px solid var(--color-primary);
  border-radius: var(--border-radius-md);
  resize: vertical;
  outline: none;
  box-sizing: border-box;
}

.translation-input::placeholder {
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-size: var(--font-size-sm);
}

.sentence-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding-bottom: var(--space-md);
}

.sentence-mode-screen .btn {
  width: 100%;                  /* fill the constrained column */
  min-height: 48px;
  font-family: var(--font-display);
  font-size: var(--font-size-md);
  border-radius: var(--border-radius-md);
  border: 2px solid var(--color-text-muted);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  text-align: center;
  box-sizing: border-box;
}

.sentence-mode-screen .btn-primary {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: var(--color-background);
}

.sentence-mode-screen .btn:active {
  transform: scale(0.98);
}

/* Loading */
.sentence-loading {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.loading-text {
  font-family: var(--font-display);
  font-size: var(--font-size-md);
  color: var(--color-secondary);
  animation: pulse 1.2s ease-in-out infinite;
  text-align: center;
}

@keyframes pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

/* Result */
.result-panel {
  border: 2px solid;
  border-radius: var(--border-radius-md);
  padding: var(--space-md);
  box-sizing: border-box;
  text-align: center;
}

.result-correct {
  border-color: var(--color-correct);
  background: var(--color-surface);
}

.result-incorrect {
  border-color: var(--color-incorrect);
  background: var(--color-surface);
}

.result-status {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-sm);
  text-align: center;
}

.result-correct .result-status {
  color: var(--color-correct);
}

.result-incorrect .result-status {
  color: var(--color-incorrect);
}

.result-feedback {
  font-family: var(--font-korean);
  font-size: var(--font-size-lg);
  color: var(--color-text);
  line-height: 1.5;
  margin-bottom: var(--space-sm);
  text-align: center;
}

.result-examples {
  margin-top: var(--space-md);
  text-align: left;             /* examples list reads better left-aligned */
}

.examples-label {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
  text-align: center;
}

.examples-list {
  list-style: none;
  padding: 0;
}

.examples-list li {
  font-family: var(--font-korean);
  font-size: 14px;
  color: var(--color-text);
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--color-text-muted);
}

.examples-list li:last-child {
  border-bottom: none;
}

.result-original {
  opacity: 0.85;
}

/* Error state */
.sentence-error {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  text-align: center;
}

.error-title {
  font-family: var(--font-display);
  font-size: var(--font-size-lg);
  color: var(--color-incorrect);
}

.error-msg {
  font-family: var(--font-display);
  font-size: var(--font-size-md);
  color: var(--color-text-muted);
  max-width: 280px;
}

/* Desktop — match main-menu column width */
@media (min-width: 640px) {
  .sentence-mode-screen {
    padding: calc(var(--space-xl) + var(--space-lg)) var(--space-md) var(--space-xl);
  }

  .sentence-mode-screen > .sentence-header,
  .sentence-mode-screen > .sentence-prompt-panel,
  .sentence-mode-screen > .sentence-input-panel,
  .sentence-mode-screen > .sentence-actions,
  .sentence-mode-screen > .result-panel,
  .sentence-mode-screen > .sentence-loading,
  .sentence-mode-screen > .sentence-error {
    max-width: 460px;
  }
}