/* ==========================================================================
   クリーンで実用的なシンプルUI
   過度な装飾やAI特有の演出を排除した、普通のWebツールスタイル
   ========================================================================== */

:root {
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --border: #e2e8f0;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --success: #16a34a;
  --success-bg: #f0fdf4;
  --success-border: #bbf7d0;
  --error: #dc2626;
  --error-bg: #fef2f2;
  --error-border: #fecaca;
  --radius: 6px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg);
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 40px 16px;
}

.container {
  width: 100%;
  max-width: 640px;
}

.header {
  margin-bottom: 24px;
}

.header h1 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
}

.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.hidden {
  display: none !important;
}

.description {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.6;
}

/* フォーム関連 */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-main);
}

.count-selector {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.btn-option {
  background-color: #f1f5f9;
  border: 1px solid var(--border);
  color: var(--text-main);
  padding: 8px 14px;
  font-size: 14px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.15s ease;
}

.btn-option:hover {
  background-color: #e2e8f0;
}

.btn-option.active {
  background-color: var(--primary);
  border-color: var(--primary);
  color: #ffffff;
  font-weight: 600;
}

.custom-count {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

.custom-count input {
  width: 80px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
}

.custom-count input:focus {
  outline: none;
  border-color: var(--primary);
}

.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  cursor: pointer;
  color: var(--text-main);
}

.checkbox-label input {
  width: 16px;
  height: 16px;
  cursor: pointer;
}

/* ボタン */
.btn {
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color 0.15s, border-color 0.15s;
}

.btn-primary {
  background-color: var(--primary);
  color: #ffffff;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-secondary {
  background-color: #f1f5f9;
  border-color: var(--border);
  color: var(--text-main);
}

.btn-secondary:hover {
  background-color: #e2e8f0;
}

.btn-block {
  width: 100%;
  display: block;
}

/* クイズ画面 */
.quiz-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-muted);
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.question-count {
  font-weight: 600;
  color: var(--text-main);
}

.quote-box {
  background-color: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 24px;
  min-height: 90px;
  display: flex;
  align-items: center;
}

.quote-text {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-main);
  white-space: pre-wrap;
  word-break: break-word;
}

.input-wrapper {
  position: relative;
  width: 100%;
  margin-bottom: 16px;
}

.text-input {
  width: 100%;
  padding: 12px 14px;
  font-size: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background-color: #ffffff;
}

.text-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.15);
}

/* 入力欄の真下に表示されるサジェストリスト */
.suggest-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  width: 100%;
  max-height: 220px;
  overflow-y: auto;
  background-color: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.08);
  z-index: 100;
}

.suggest-item {
  padding: 10px 14px;
  font-size: 14px;
  color: var(--text-main);
  cursor: pointer;
  border-bottom: 1px solid #f1f5f9;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.suggest-item:last-child {
  border-bottom: none;
}

.suggest-item:hover,
.suggest-item.selected {
  background-color: #f8fafc;
  color: var(--primary);
}

.suggest-item.selected {
  font-weight: 600;
}

.action-buttons {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.action-buttons.result-actions {
  justify-content: center;
  margin-top: 24px;
}

/* 判定フィードバック */
.feedback-box {
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}

.feedback-box.correct {
  background-color: var(--success-bg);
  border: 1px solid var(--success-border);
}

.feedback-box.incorrect {
  background-color: var(--error-bg);
  border: 1px solid var(--error-border);
}

.feedback-status {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.feedback-box.correct .feedback-status {
  color: var(--success);
}

.feedback-box.incorrect .feedback-status {
  color: var(--error);
}

.feedback-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 14px;
  margin-bottom: 14px;
}

.feedback-row {
  display: flex;
  gap: 8px;
}

.feedback-label {
  color: var(--text-muted);
}

.feedback-answer {
  color: var(--text-main);
}

.shortcut-tip {
  margin-top: 16px;
  text-align: right;
  font-size: 12px;
  color: #94a3b8;
}

/* リザルト画面 */
.result-title {
  font-size: 18px;
  margin-bottom: 16px;
  text-align: center;
}

.result-score-box {
  background-color: #f8fafc;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  margin-bottom: 24px;
}

.result-score {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
}

.result-rate {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}

.history-container {
  margin-top: 16px;
}

.history-title {
  font-size: 14px;
  margin-bottom: 10px;
  color: var(--text-muted);
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 320px;
  overflow-y: auto;
}

.history-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  background-color: #ffffff;
  font-size: 13px;
}

.history-item.correct {
  border-left: 4px solid var(--success);
}

.history-item.incorrect {
  border-left: 4px solid var(--error);
}

.history-item-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 4px;
  font-weight: 600;
}

.history-item.correct .history-tag {
  color: var(--success);
}

.history-item.incorrect .history-tag {
  color: var(--error);
}

.history-item-quote {
  color: var(--text-muted);
  margin-bottom: 6px;
  white-space: pre-wrap;
}

.history-item-ans {
  display: flex;
  gap: 12px;
  font-size: 12px;
}

.history-item-target {
  font-weight: 600;
}