:root {
  --bg: #f7fafd;
  --bg-accent: radial-gradient(circle at 20% 20%, rgba(125, 183, 255, 0.18), transparent 32%),
    radial-gradient(circle at 70% 0%, rgba(198, 242, 122, 0.28), transparent 38%);
  --card: #ffffff;
  --text-main: #1b2733;
  --text-sub: #4a5560;
  --line-soft: #e8eef7;
  --accent: #7db7ff;
  --accent-strong: #3b82f6;
  --accent-warm: #c6f27a;
  --accent-error: #ff6f61;
  --accent-warning: #f2c45a;
  --muted: #94a3b8;
  --shadow-soft: 0 14px 28px rgba(78, 183, 255, 0.08);
}

body {
  margin: 0;
  padding: 0 2rem 3.5rem;
  font-family: "Meiryo", "Segoe UI", "Hiragino Sans", "Yu Gothic", sans-serif;
  background: var(--bg);
  background-image: var(--bg-accent);
  color: var(--text-main);
}

.page {
  max-width: 1240px;
  margin: 0 auto;
}

header {
  padding: 2rem 0 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  background: #e9f3ff;
  color: #1c64f2;
  font-weight: 700;
  margin: 0;
  width: fit-content;
}

.lede {
  margin: 0;
  color: var(--text-sub);
  line-height: 1.6;
}

h1 {
  margin: 0;
  font-size: clamp(1.6rem, 2vw, 2.1rem);
}

main {
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  background: #e3f2ff;
  color: #1c64f2;
  font-weight: 700;
  font-size: 0.9rem;
}

.session-guide {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.guide-header {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.guide-subtitle {
  color: var(--text-sub);
  font-size: 0.95rem;
}

.guide-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.6rem;
}

.guide-step {
  background: #f1f6ff;
  border: 1px solid #dce8fb;
  border-radius: 10px;
  padding: 0.8rem 0.9rem;
  box-shadow: 0 1px 2px rgba(54, 101, 164, 0.1);
}

.guide-step-title {
  font-weight: 700;
  margin-bottom: 0.35rem;
  color: #1c64f2;
}

.course-controls {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  padding: 0.8rem;
  background: var(--card);
  border-radius: 12px;
  box-shadow: var(--shadow-soft);
}

.course-arrow {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: none;
  background: #e5efff;
  color: #1c7ed6;
  font-size: 1.1rem;
  cursor: pointer;
}

.course-arrow:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.course-scroll {
  flex: 1;
  display: flex;
  gap: 0.6rem;
  overflow-x: auto;
  scrollbar-width: none;
}

.course-scroll::-webkit-scrollbar {
  display: none;
}

.course-scroll button {
  flex: 0 0 auto;
  border-radius: 999px;
  padding: 0.5rem 1rem;
  border: 1px solid #d8e2f0;
  background: #fff;
  color: var(--text-main);
  font-weight: 700;
  cursor: pointer;
}

.course-scroll button.active {
  background: linear-gradient(90deg, #7db7ff, #a0e196);
  color: #0b2b4a;
  border-color: transparent;
}

.card {
  background: var(--card);
  border-radius: 16px;
  padding: 1.35rem;
  box-shadow: var(--shadow-soft);
}

.scenario {
  color: var(--text-sub);
  margin-top: 0;
}

.hints ul {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
}

.metrics {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 0.5rem;
  font-size: 0.95rem;
  color: var(--text-sub);
}

.theme-guide {
  margin: 0 0 0.3rem;
  font-weight: 600;
  color: #495057;
}

.practice-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.6rem;
  position: relative;
  align-items: stretch;
}

@media (min-width: 1100px) {
  .practice-layout {
    grid-template-columns: 1.05fr 1fr;
    align-items: start;
    column-gap: 1rem;
  }
}

.practice-followup {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card.inactive,
.practice-layout.inactive {
  opacity: 0.5;
  pointer-events: none;
  position: relative;
}

.practice-layout.inactive::after,
.practice-followup.inactive::after,
.card.inactive::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.4);
  pointer-events: none;
}

.practice-layout > .card {
  display: flex;
  flex-direction: column;
}

.text-box {
  white-space: pre-wrap;
  padding: 1.15rem;
  border-radius: 10px;
  min-height: 320px;
  line-height: 1.35;
  font-size: 1.05rem;
  font-family: "Meiryo", "Segoe UI", "Noto Sans JP", "Yu Gothic", sans-serif;
  background: #f7faff;
  border: 1px solid #d8e2f0;
  width: 100%;
  box-sizing: border-box;
  flex: 1;
}

.example-panel pre {
  white-space: pre-wrap;
  overflow: auto;
  margin: 0;
}

.example-panel h3,
.input-panel h3 {
  margin-top: 0;
}

.input-panel textarea {
  resize: vertical;
  min-height: 320px;
}

.input-panel textarea:focus {
  border-color: #9bc9ff;
  outline: 2px solid rgba(125, 183, 255, 0.35);
}

.input-panel textarea.input-error {
  border-color: var(--accent-error);
  background: #fff6f3;
}

.session-progress {
  margin-top: 0.2rem;
  background: #f4f8ff;
  border: 1px solid #dfe9fb;
  border-radius: 12px;
  padding: 0.8rem;
}

.progress-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-sub);
  font-size: 0.95rem;
}

.progress-bar {
  margin-top: 0.45rem;
  background: #e7eef8;
  border-radius: 999px;
  height: 10px;
  overflow: hidden;
}

.progress-bar div {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, #7db7ff, #c6f27a);
  transition: width 0.2s ease;
}

.status-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 0.5rem;
  font-size: 0.95rem;
}

.status-indicator {
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  background: #eef2f7;
  color: var(--text-sub);
}

.status-indicator.ready {
  background: #ffe99d;
}

.status-indicator.progress {
  background: #d7e8ff;
}

.status-indicator.completed {
  background: #d9f7c3;
}

.hint-box {
  background: #f5f7fb;
  padding: 0.6rem;
  border-radius: 6px;
  border: 1px solid #e1e7f0;
}

.hint-box ul {
  margin: 0.4rem 0 0;
  padding-left: 1.2rem;
}

.practice-status-block {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.practice-actions {
  display: flex;
  justify-content: flex-start;
  gap: 0.5rem;
}

.result-row {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.result-question {
  font-weight: 600;
  margin: 0;
  flex-basis: 100%;
}

.result-feedback {
  display: flex;
  gap: 0.5rem;
}

.result-actions {
  display: flex;
  gap: 0.75rem;
  flex-basis: 100%;
}

.result-actions .next-button,
.result-actions .retry-button {
  flex: 1 1 150px;
  padding: 0.7rem 1.2rem;
  font-weight: 600;
}

.result-actions .next-button {
  border: none;
}

.result-actions .retry-button {
  border: 1px solid transparent;
}

button {
  padding: 0.4rem 0.9rem;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  color: #0b2b4a;
  background: #e8f2ff;
  border: 1px solid #d1e5ff;
  font-weight: 700;
}

button:hover:not(:disabled) {
  background: #ddecff;
}

.result-actions .next-button,
.result-actions .retry-button {
  font-size: 1.05rem;
  padding: 0.85rem 1.3rem;
}

.result-actions .next-button {
  background: linear-gradient(90deg, #7db7ff, #c6f27a);
  color: #0b2b4a;
  border: none;
}

.result-actions .retry-button {
  background: #f6f8fb;
  color: #324255;
  border: 1px solid #d4deea;
}

#goodBtn {
  background: linear-gradient(90deg, #9ae6b4, #c6f27a);
  color: #0f3b2a;
}

#badBtn {
  background: #ff6f61;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.ghost {
  background: transparent;
  color: #4b5563;
  border: 1px solid #d4deea;
}

.ghost:hover:not(:disabled) {
  background: #eef4ff;
}

.example-actions {
  margin-top: 1rem;
  display: flex;
  justify-content: flex-start;
}

.start-button {
  width: 100%;
  max-width: 360px;
  padding: 0.9rem 1.5rem;
  border: none;
  border-radius: 999px;
  font-size: 1.2rem;
  font-weight: 600;
  background: linear-gradient(90deg, #7db7ff, #c6f27a);
  color: #0b2b4a;
  cursor: pointer;
  transition: opacity 0.2s;
}

.start-button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

#logsTable {
  width: 100%;
  border-collapse: collapse;
}

#logsTable th,
#logsTable td {
  border-bottom: 1px solid #ececec;
  padding: 0.5rem;
  text-align: center;
  font-size: 0.95rem;
}

#logsTable th:nth-child(4),
#logsTable th:nth-child(5),
#logsTable th:nth-child(6),
#logsTable td:nth-child(4),
#logsTable td:nth-child(5),
#logsTable td:nth-child(6) {
  font-size: 1rem;
  font-weight: 600;
}

.example-panel pre span.seg-bold {
  font-weight: 600;
}

.example-panel pre span.seg-quote {
  color: inherit;
  border-left: 3px solid #bbb;
  padding-left: 0.5rem;
}

.example-panel pre span.seg-code {
  font-family: "Cascadia Code", "Fira Code", "Meiryo", monospace;
  background: #e9f1ff;
  color: #1d4ed8;
  display: block;
  padding: 0.5rem;
  border-radius: 6px;
  margin: 0.5rem 0;
}

.example-panel pre span.seg-role {
  font-weight: 600;
  color: inherit;
}

.example-panel pre span.seg-instruction {
  color: inherit;
}

.example-panel pre span.seg-section-title {
  font-weight: 600;
  color: inherit;
}

.example-panel pre span.seg-note {
  font-style: italic;
  color: inherit;
}

.example-panel pre span.error-highlight {
  background: #ffd6d9;
  padding: 0.1rem 0.2rem;
}

.example-panel.plain pre span.seg-bold,
.example-panel.plain pre span.seg-role,
.example-panel.plain pre span.seg-section-title {
  font-weight: 400;
}

.example-panel.plain pre span.seg-note {
  font-style: normal;
}

.example-panel.plain pre span.seg-code {
  font-family: "Noto Sans JP", "Yu Gothic", "Meiryo", sans-serif;
  background: none;
  color: inherit;
  padding: 0;
  border-radius: 0;
  margin: 0;
}

.example-panel.plain pre span.seg-quote {
  border-left: none;
  padding-left: 0;
}

.logs-header {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.logs-title-row {
  display: flex;
  align-items: baseline;
  gap: 0.65rem;
}

.logs-title-row h3 {
  margin: 0;
  font-size: 1.35rem;
}

.logs-total {
  font-size: 1.05rem;
  font-weight: 700;
  color: #1c64f2;
}

.logs-badges {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: flex-start;
}

.badge {
  padding: 0.35rem 0.7rem;
  border-radius: 10px;
  background: #eef4ff;
  color: #1b2733;
  font-weight: 700;
  border: 1px solid #d8e2f0;
  font-size: 0.9rem;
}

.logs-table-wrapper {
  margin-top: 0.5rem;
  border: 1px solid #dee2e6;
  border-radius: 6px;
  max-height: 220px;
  overflow-y: auto;
}

.logs-table-wrapper::-webkit-scrollbar {
  width: 8px;
}

.logs-table-wrapper::-webkit-scrollbar-thumb {
  background: #ced4da;
  border-radius: 4px;
}

#logsTable tbody tr:nth-child(even) {
  background: #f8f9fa;
}

.date-line {
  font-weight: 600;
}

.time-line {
  font-size: 0.85rem;
  color: #495057;
}

.logs-visuals {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
}

.calendar-panel,
.chart-panel {
  flex: 1 1 280px;
  background: #f5f8ff;
  border-radius: 10px;
  padding: 0.75rem;
}

.calendar-panel h4,
.chart-panel h4 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
}

.calendar-label {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.25rem;
}

.calendar-grid .day {
  text-align: center;
  padding: 0.35rem 0.15rem;
  border-radius: 6px;
  font-size: 0.85rem;
  background: #fff;
}

.calendar-grid .day.header {
  font-weight: 600;
  background: transparent;
  color: #343a40;
}

.calendar-grid .day.header.sun {
  color: #d9480f;
}

.calendar-grid .day.header.sat {
  color: #1c7ed6;
}

.calendar-grid .day.muted {
  color: #adb5bd;
  background: #f1f3f5;
}

.calendar-grid .day.marked {
  background: linear-gradient(90deg, #7db7ff, #c6f27a);
  color: #0b2b4a;
  font-weight: 700;
}

#speedChart {
  width: 100%;
  max-width: 100%;
}

.hidden {
  display: none !important;
}