/* 融資タイプタブ */
.type-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 24px;
  border-radius: 12px;
  overflow: hidden;
  border: 2px solid var(--card-border);
}
.type-tab {
  flex: 1;
  padding: 14px 0;
  text-align: center;
  font-weight: 700;
  font-size: 15px;
  cursor: pointer;
  background: var(--card);
  color: var(--text-dim);
  border: none;
  transition: all 0.2s;
}
.type-tab.active {
  background: var(--accent);
  color: #fff;
}
/* 成績履歴 */
.history-section {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 20px;
  margin: 20px 0;
}
.history-section h3 {
  margin: 0 0 12px 0;
  font-size: 16px;
}
.history-item {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--card-border);
  font-size: 14px;
}
.history-item:last-child {
  border-bottom: none;
}
.history-stats {
  display: flex;
  gap: 16px;
  margin-top: 12px;
  font-size: 14px;
  color: var(--text-dim);
}
/* ローディング */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  font-size: 18px;
  color: var(--accent);
}
:root {
  --bg: #0f1117;
  --card: #1a1d27;
  --card-border: #2a2d3a;
  --text: #e8e9ed;
  --text-dim: #8b8d97;
  --accent: #10b981;
  --green: #34d399;
  --green-dim: rgba(52,211,153,0.12);
  --red: #f87171;
  --red-dim: rgba(248,113,113,0.12);
  --yellow: #fbbf24;
  --yellow-dim: rgba(251,191,36,0.12);
  --mail-bg: #161822;
  --mail-border: #2e3144;
}
* { margin:0; padding:0; box-sizing:border-box; }
body {
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}

.screen { display: none; }
.screen.active { display: block; }

.start-screen {
  text-align: center;
  padding-top: 60px;
}
.start-logo {
  font-size: 48px;
  margin-bottom: 16px;
}
.start-label {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 2px;
  margin-bottom: 12px;
  color: var(--text-dim);
}
.start-title {
  font-size: 28px;
  font-weight: 900;
  letter-spacing: -0.5px;
  margin-bottom: 8px;
  line-height: 1.4;
  background: linear-gradient(135deg, #10b981, #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.start-subtitle {
  font-size: 28px;
  font-weight: 900;
  letter-spacing: -0.5px;
  margin-bottom: 40px;
  line-height: 1.4;
  background: linear-gradient(135deg, #10b981, #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.start-rules {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 28px 24px;
  text-align: left;
  margin-bottom: 32px;
}
.start-rules h3 {
  font-size: 14px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 16px;
}
.rule-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 14px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
}
.rule-num {
  flex-shrink: 0;
  width: 28px; height: 28px;
  background: var(--accent);
  color: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 13px;
}
.judge-row {
  display: flex;
  gap: 12px;
  margin: 20px 0;
  flex-wrap: wrap;
}
.judge-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
}
.judge-chip.red { background: var(--red-dim); color: var(--red); }
.judge-chip.yellow { background: var(--yellow-dim); color: var(--yellow); }
.judge-chip.green { background: var(--green-dim); color: var(--green); }

.start-from {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 24px;
  font-size: 14px;
  color: var(--text-dim);
}
.start-from input {
  width: 70px;
  padding: 10px 12px;
  font-size: 16px;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text);
  background: var(--card);
  border: 2px solid var(--card-border);
  border-radius: 10px;
  text-align: center;
  outline: none;
  transition: border-color 0.2s;
}
.start-from input:focus {
  border-color: var(--accent);
}

.toc-section {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 20px 24px;
  text-align: left;
  margin-bottom: 24px;
}
.toc-section h3 {
  font-size: 14px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.toc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
@media (max-width: 500px) {
  .toc-grid { grid-template-columns: 1fr; }
}
.toc-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--card-border);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.toc-item:hover {
  background: rgba(16,185,129,0.1);
  border-color: var(--accent);
}
.toc-item:active {
  transform: scale(0.98);
}
.toc-no {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  font-weight: 700;
  color: var(--accent);
  background: rgba(16,185,129,0.15);
  padding: 4px 8px;
  border-radius: 6px;
  min-width: 52px;
  text-align: center;
}
.toc-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  line-height: 1.4;
}

.btn-start {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 48px;
  font-size: 18px;
  font-weight: 700;
  font-family: 'Noto Sans JP', sans-serif;
  color: #fff;
  background: linear-gradient(135deg, #10b981, #059669);
  border: none;
  border-radius: 14px;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 4px 24px rgba(16,185,129,0.3);
}
.btn-start:hover { transform: translateY(-2px); box-shadow: 0 6px 32px rgba(16,185,129,0.4); }

.start-buttons {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.btn-random {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  font-size: 15px;
  font-weight: 700;
  font-family: 'Noto Sans JP', sans-serif;
  color: #fff;
  background: linear-gradient(135deg, #f59e0b, #d97706);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 4px 16px rgba(245,158,11,0.3);
}
.btn-random:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(245,158,11,0.4);
}

.drill-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
.btn-home {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 500;
  font-family: 'Noto Sans JP', sans-serif;
  color: var(--text-dim);
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
  margin-bottom: 16px;
}
.btn-home:hover {
  color: var(--text);
  border-color: var(--accent);
  background: rgba(16,185,129,0.08);
}
.progress-info {
  display: flex;
  align-items: center;
  gap: 16px;
}
.progress-badge {
  background: var(--card);
  border: 1px solid var(--card-border);
  padding: 8px 16px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 700;
}
.progress-badge span { color: var(--accent); }
.timer-display {
  font-family: 'JetBrains Mono', monospace;
  font-size: 22px;
  font-weight: 700;
  color: var(--yellow);
  min-width: 60px;
  text-align: right;
}
.progress-bar-wrap {
  height: 4px;
  background: var(--card);
  border-radius: 2px;
  margin-bottom: 28px;
  overflow: hidden;
}
.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #10b981, #34d399);
  border-radius: 2px;
  transition: width 0.4s ease;
}

.mail-card {
  background: var(--mail-bg);
  border: 1px solid var(--mail-border);
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 28px;
  animation: slideIn 0.35s ease;
}
@keyframes slideIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.mail-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--mail-border);
  background: rgba(255,255,255,0.02);
}
.mail-avatar {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, #10b981, #059669);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.mail-from {
  font-size: 13px;
  color: var(--text-dim);
}
.mail-from strong { color: var(--text); font-weight: 500; }
.mail-time {
  font-size: 12px;
  color: var(--text-dim);
  margin-left: auto;
}
.mail-subject {
  padding: 24px 20px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.65;
  color: #fff;
  letter-spacing: 0.2px;
}
.mail-subject .yield {
  color: var(--yellow);
}

.answer-buttons {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}
.btn-answer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 20px 8px;
  font-family: 'Noto Sans JP', sans-serif;
  font-size: 14px;
  font-weight: 700;
  border: 2px solid var(--card-border);
  border-radius: 14px;
  background: var(--card);
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
  -webkit-tap-highlight-color: transparent;
}
.btn-answer .icon {
  font-size: 32px;
  line-height: 1;
}
.btn-answer:active { transform: scale(0.96); }
.btn-answer.red:hover, .btn-answer.red:focus {
  border-color: var(--red);
  background: var(--red-dim);
  color: var(--red);
}
.btn-answer.yellow:hover, .btn-answer.yellow:focus {
  border-color: var(--yellow);
  background: var(--yellow-dim);
  color: var(--yellow);
}
.btn-answer.green:hover, .btn-answer.green:focus {
  border-color: var(--green);
  background: var(--green-dim);
  color: var(--green);
}

.feedback {
  display: none;
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 16px;
  animation: fadeIn 0.3s ease;
}
@keyframes fadeIn { from { opacity:0; } to { opacity:1; } }
.feedback.show { display: block; }
.feedback.correct {
  background: var(--green-dim);
  border: 1px solid rgba(52,211,153,0.3);
}
.feedback.wrong {
  background: var(--red-dim);
  border: 1px solid rgba(248,113,113,0.3);
}
.fb-result {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
}
.fb-result.correct { color: var(--green); }
.fb-result.wrong { color: var(--red); }
.fb-answer {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.fb-explain {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
  margin-bottom: 10px;
}
.fb-trap {
  font-size: 13px;
  color: var(--red);
  font-weight: 500;
  padding: 8px 12px;
  background: rgba(248,113,113,0.08);
  border-radius: 8px;
  margin-bottom: 10px;
}
.fb-raise {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  line-height: 1.8;
  color: var(--text-dim);
  background: rgba(0,0,0,0.2);
  padding: 12px;
  border-radius: 8px;
  margin-top: 8px;
}
.fb-time {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 8px;
}
.fb-time strong {
  font-family: 'JetBrains Mono', monospace;
  color: var(--yellow);
}

.btn-next {
  display: block;
  width: 100%;
  padding: 16px;
  font-size: 16px;
  font-weight: 700;
  font-family: 'Noto Sans JP', sans-serif;
  color: #fff;
  background: var(--accent);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.15s;
}
.btn-next:hover { background: #059669; }

/* Checkpoint Modal */
.checkpoint-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}
.checkpoint-overlay.active { display: flex; }
.checkpoint-box {
  background: #fff;
  border-radius: 20px;
  padding: 36px 32px;
  max-width: 420px;
  width: 90%;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,0.3);
  animation: checkpointIn 0.3s ease;
}
@keyframes checkpointIn {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
.checkpoint-icon { font-size: 48px; margin-bottom: 12px; }
.checkpoint-title {
  font-size: 22px;
  font-weight: 800;
  color: #1a1a2e;
  margin-bottom: 8px;
}
.checkpoint-stats {
  font-size: 15px;
  color: #555;
  margin-bottom: 24px;
  line-height: 1.6;
}
.checkpoint-stats strong { color: #10b981; }
.checkpoint-buttons {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.btn-checkpoint-continue {
  padding: 14px 24px;
  font-size: 16px;
  font-weight: 700;
  font-family: 'Noto Sans JP', sans-serif;
  color: #fff;
  background: linear-gradient(135deg, #10b981, #059669);
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 4px 16px rgba(16,185,129,0.3);
}
.btn-checkpoint-continue:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(16,185,129,0.4); }
.btn-checkpoint-end {
  padding: 14px 24px;
  font-size: 16px;
  font-weight: 700;
  font-family: 'Noto Sans JP', sans-serif;
  color: #10b981;
  background: #fff;
  border: 2px solid #10b981;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-checkpoint-end:hover { background: #f0fdf4; }

.result-screen { text-align: center; padding-top: 40px; }
.result-icon { font-size: 64px; margin-bottom: 16px; }
.result-title {
  font-size: 28px; font-weight: 900; margin-bottom: 8px;
}
.result-sub { font-size: 15px; color: var(--text-dim); margin-bottom: 32px; }

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 12px;
  margin-bottom: 32px;
}
.stat-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 20px 12px;
}
.stat-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 4px;
}
.stat-value.green { color: var(--green); }
.stat-value.red { color: var(--red); }
.stat-value.yellow { color: var(--yellow); }
.stat-label { font-size: 12px; color: var(--text-dim); }

.result-detail {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  overflow: hidden;
  text-align: left;
  margin-bottom: 24px;
}
.rd-header {
  padding: 14px 20px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 1px solid var(--card-border);
}
.rd-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--card-border);
  font-size: 13px;
}
.rd-row:last-child { border-bottom: none; }
.rd-icon { font-size: 18px; flex-shrink: 0; }
.rd-no {
  flex-shrink: 0;
  width: 24px;
  color: var(--text-dim);
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
}
.rd-subj {
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text);
}
.rd-time {
  flex-shrink: 0;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--text-dim);
}

.btn-retry {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 40px;
  font-size: 16px;
  font-weight: 700;
  font-family: 'Noto Sans JP', sans-serif;
  color: #fff;
  background: linear-gradient(135deg, #10b981, #059669);
  border: none;
  border-radius: 14px;
  cursor: pointer;
  transition: all 0.2s;
}
.btn-retry:hover { transform: translateY(-2px); }

.disclaimer {
  margin-top: 32px;
  padding: 16px 20px;
  background: rgba(251,191,36,0.08);
  border: 1px solid rgba(251,191,36,0.2);
  border-radius: 12px;
  font-size: 11px;
  line-height: 1.7;
  color: var(--text-dim);
  text-align: left;
}
.disclaimer strong { color: var(--yellow); }

@media (max-width: 500px) {
  .start-label { font-size: 12px; }
  .start-title { font-size: 22px; }
  .start-subtitle { font-size: 22px; }
  .mail-subject { font-size: 15px; padding: 18px 16px; }
  .answer-buttons { gap: 8px; }
  .btn-answer { padding: 16px 6px; font-size: 13px; }
  .btn-answer .icon { font-size: 28px; }
}