:root {
  --bg-base: #0f1117;
  --bg-surface: #1a1d27;
  --bg-card: #22263a;
  --bg-hover: #2a2f47;
  --border: #2e3250;
  --border-light: #3d4270;
  --accent: #6c63ff;
  --accent-light: #8b84ff;
  --accent-dim: rgba(108, 99, 255, 0.15);
  --title-c1: #a5b4fc;
  --title-c2: #818cf8;
  --color-attend: #34d399;
  --color-absent: #f87171;
  --color-late: #fbbf24;
  --text-primary: #e8eaf6;
  --text-secondary: #acb0cc;
  --text-muted: #7c80a8;
  --header-h: 56px;
  --period-col-w: 60px;
  --cell-min-w: 120px;
  --cell-min-h: 110px;
  --font-base: 'Noto Sans JP', 'Inter', sans-serif;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

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

html,
body {
  height: 100%;
}

body {
  font-family: var(--font-base);
  background: var(--bg-base);
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  background: var(--bg-base);
  border-bottom: 1px solid var(--border);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.title-block {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.app-icon {
  font-size: 22px;
}

.app-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent-light);
  letter-spacing: 0.02em;
}

.semester-label {
  font-size: 12px;
  color: var(--text-primary);
  letter-spacing: 0.03em;
  font-weight: 500;
  white-space: nowrap;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.total-credits {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--bg-hover);
  padding: 6px 12px;
  border-radius: 20px;
  border: 1px solid var(--border);
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 4px;
}

#total-credits-val {
  font-size: 15px;
  color: var(--accent-light);
}

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

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s, border-color 0.2s;
}

.icon-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border-light);
}

.icon-btn svg {
  width: 18px;
  height: 18px;
}

.btn {
  padding: 8px 18px;
  border-radius: 10px;
  border: none;
  font-family: var(--font-base);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s var(--ease);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 16px rgba(108, 99, 255, 0.35);
}

.btn-primary:hover {
  background: var(--accent-light);
  box-shadow: 0 6px 20px rgba(108, 99, 255, 0.5);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

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

.btn-danger {
  background: rgba(248, 113, 113, 0.15);
  color: var(--color-absent);
  border: 1px solid rgba(248, 113, 113, 0.3);
}

.btn-danger:hover {
  background: rgba(248, 113, 113, 0.25);
}

.main-content {
  padding: 20px 16px;
  height: calc(100vh - var(--header-h));
  display: flex;
  flex-direction: column;
}

.timetable-wrapper {
  overflow-x: auto;
  overflow-y: auto;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  flex: 1;
}

.timetable {
  border-collapse: collapse;
  width: 100%;
  height: 100%;
  min-height: 100%;
  min-width: 500px;
  table-layout: fixed;
}

.timetable thead th {
  padding: 14px 10px;
  text-align: center;
  font-weight: 600;
  font-size: 13px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.th-period-corner {
  width: var(--period-col-w);
  min-width: var(--period-col-w);
  max-width: var(--period-col-w);
  box-sizing: border-box;
}

.th-day {
  min-width: var(--cell-min-w);
  color: var(--text-secondary);
  letter-spacing: 0.08em;
}

.th-day.today {
  color: var(--text-primary);
  font-weight: 700;
}

.td-period {
  width: var(--period-col-w);
  min-width: var(--period-col-w);
  max-width: var(--period-col-w);
  box-sizing: border-box;
  text-align: center;
  padding: 12px 4px;
  vertical-align: top;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  user-select: none;
}

.period-number {
  display: block;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-secondary);
  line-height: 1;
  margin-bottom: 6px;
}

.period-number-label {
  font-size: 9px;
  color: var(--text-muted);
  margin-top: -2px;
  margin-bottom: 4px;
  display: block;
}

.period-time {
  display: block;
  font-size: 10px;
  color: var(--text-muted);
  line-height: 1.25;
  font-variant-numeric: tabular-nums;
  white-space: pre-line;
  padding-top: 8px;
}

.td-period.current-period .period-number {
  color: var(--text-primary);
}

.td-period.current-period {
  background: var(--bg-hover);
}

.td-class {
  min-width: var(--cell-min-w);
  min-height: var(--cell-min-h);
  padding: 6px;
  vertical-align: top;
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  transition: background 0.15s;
}

.td-class:last-child {
  border-right: none;
}

.timetable tbody tr:last-child .td-class,
.timetable tbody tr:last-child .td-period {
  border-bottom: none;
}

.td-class.today-col {
  background: var(--bg-surface);
}

.class-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  height: 100%;
  min-height: var(--cell-min-h);
  cursor: pointer;
  transition: all 0.2s var(--ease);
  display: flex;
  flex-direction: column;
  gap: 3px;
  position: relative;
  overflow: hidden;
}

.class-card::before {
  display: none;
}

.class-card:hover {
  background: var(--bg-hover);
  border-color: var(--border-light);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.35);
}

.class-name {
  font-size: 13px;
  font-weight: 500;
  color: #fff;
  line-height: 1.3;
  text-align: center;
  margin-left: 0;
  margin-top: 10px;
}

.class-meta {
  font-size: 10px;
  color: var(--text-muted);
  margin-left: 4px;
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.class-attendance-badge {
  display: flex;
  gap: 4px;
  margin-top: auto;
  margin-left: 4px;
  flex-wrap: wrap;
}

.badge {
  font-size: 9px;
  font-weight: 600;
  padding: 2px 5px;
  border-radius: 4px;
}

.badge-attend {
  background: rgba(52, 211, 153, 0.15);
  color: var(--color-attend);
}

.badge-absent {
  background: rgba(248, 113, 113, 0.15);
  color: var(--color-absent);
}

.badge-late {
  background: rgba(251, 191, 36, 0.15);
  color: var(--color-late);
}

.room-badge {
  font-size: 11px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 20px;
  background: var(--bg-hover);
  color: #fff;
  display: inline-block;
  margin-top: auto;
  margin-left: 0;
  align-self: center;
  border: 1px solid transparent;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
  transition: box-shadow 0.2s;
}

.color-palettes {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.color-palette-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.palette-group-label {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
}

.color-swatches {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
}

.color-swatch {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
  position: relative;
  flex-shrink: 0;
}

.color-swatch:hover {
  transform: scale(1.15);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

.color-swatch.selected {
  border-color: #fff;
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.5);
  transform: scale(1.1);
}

.color-swatch.swatch-none {
  background: var(--bg-card) !important;
  border-color: var(--border);
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
}

.color-swatch.swatch-none.selected {
  border-color: var(--accent);
}

.color-picker-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 8px;
}

.custom-color-picker {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  width: 32px;
  height: 32px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: none;
  cursor: pointer;
}

.custom-color-picker::-webkit-color-swatch-wrapper {
  padding: 2px;
}

.custom-color-picker::-webkit-color-swatch {
  border: none;
  border-radius: 6px;
}

.custom-color-picker::-moz-color-swatch {
  border: none;
  border-radius: 6px;
}

.custom-swatch-container {
  position: relative;
  display: inline-block;
}

.swatch-delete {
  position: absolute;
  top: -6px;
  right: -6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  padding: 0;
  opacity: 0;
  transition: opacity 0.2s, background 0.2s, color 0.2s;
}

.custom-swatch-container:hover .swatch-delete {
  opacity: 1;
}

.swatch-delete:hover {
  background: rgba(248, 113, 113, 0.15);
  color: var(--color-absent);
  border-color: var(--color-absent);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

.empty-cell {
  width: 100%;
  min-height: var(--cell-min-h);
  cursor: pointer;
  border-radius: 12px;
  transition: background 0.2s var(--ease);
}

.empty-cell:hover {
  background: var(--bg-hover);
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg-base);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  animation: fadeIn 0.2s var(--ease);
}

.modal-overlay[hidden] {
  display: none;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.6);
  animation: slideUp 0.25s var(--ease);
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.class-detail-modal {
  max-width: 520px;
}

.settings-modal {
  max-width: 480px;
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border);
}

.modal-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
}

.modal-close {
  border: none;
  background: transparent;
  font-size: 16px;
  color: var(--text-muted);
}

.modal-close:hover {
  color: var(--text-primary);
}

.modal-body {
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  flex: 1;
}

.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-right {
  display: flex;
  gap: 10px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group.inline {
  flex-direction: row;
  align-items: center;
  gap: 10px;
}

.form-group.inline input {
  width: 80px;
}

.form-group label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

input[type="text"],
input[type="number"],
input[type="time"],
textarea {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-primary);
  font-family: var(--font-base);
  font-size: 14px;
  padding: 10px 12px;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  width: 100%;
}

input[type="text"]:focus,
input[type="number"]:focus,
input[type="time"]:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.2);
}

textarea {
  resize: vertical;
}

.unit-text {
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
}

.attendance-section {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.section-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.attendance-counters {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.counter-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  transition: border-color 0.2s;
}

.counter-card.attend {
  border-color: rgba(52, 211, 153, 0.25);
}

.counter-card.absent {
  border-color: rgba(248, 113, 113, 0.25);
}

.counter-card.late {
  border-color: rgba(251, 191, 36, 0.25);
}

.counter-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
}

.counter-card.attend .counter-label {
  color: var(--color-attend);
}

.counter-card.absent .counter-label {
  color: var(--color-absent);
}

.counter-card.late .counter-label {
  color: var(--color-late);
}

.counter-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.counter-value {
  font-size: 26px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  min-width: 36px;
  text-align: center;
  line-height: 1;
}

.counter-btn {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}

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

.counter-btn.plus:hover {
  border-color: var(--accent);
  color: var(--accent-light);
}

.counter-btn.minus:hover {
  border-color: var(--color-absent);
  color: var(--color-absent);
}

.settings-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.settings-section-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 8px;
}

.day-toggle-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.day-toggle {
  padding: 7px 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-family: var(--font-base);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  user-select: none;
}

.day-toggle.active {
  background: var(--accent-dim);
  border-color: var(--accent);
  color: var(--accent-light);
}

.period-time-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 260px;
  overflow-y: auto;
  padding-right: 4px;
}

.period-time-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.period-time-row .period-num-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  min-width: 36px;
}

.memo-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

.memo-card {
  background: var(--bg-hover);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  position: relative;
}

.memo-date {
  font-size: 10px;
  color: var(--text-muted);
  margin-bottom: 6px;
  display: block;
}

.memo-text {
  font-size: 13px;
  color: var(--text-primary);
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-all;
}

.memo-actions {
  position: absolute;
  top: 8px;
  right: 8px;
  display: flex;
  gap: 4px;
}

.memo-action-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 12px;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  transition: background 0.2s, color 0.2s;
}

.memo-action-btn:hover {
  background: var(--bg-card);
  color: var(--text-primary);
}

.memo-action-btn.delete:hover {
  color: var(--color-absent);
  background: rgba(248, 113, 113, 0.15);
}

.memo-input-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.memo-input-container textarea {
  width: 100%;
  resize: vertical;
}

.btn-add-memo {
  align-self: flex-end;
  padding: 6px 16px;
  font-size: 13px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-add-memo:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border-light);
}

.memo-edit-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
  margin-top: 8px;
}

.period-time-row input[type="time"] {
  flex: 1;
  padding: 8px 10px;
  font-size: 13px;
}

.period-time-sep {
  color: var(--text-muted);
  font-size: 12px;
}

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.semester-picker {
  display: flex;
  align-items: center;
  gap: 8px;
}

.semester-picker select {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text-primary);
  font-family: var(--font-base);
  font-size: 14px;
  padding: 8px 10px;
  outline: none;
  cursor: pointer;
}

.semester-picker select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.2);
}

@media (max-width: 600px) {
  .main-content {
    padding: 12px 8px;
  }

  :root {
    --cell-min-w: 90px;
    --period-col-w: 40px;
  }

  .attendance-counters {
    grid-template-columns: 1fr;
    /* 横スクロール防止のため1列にスタック */
    gap: 8px;
  }

  .counter-value {
    font-size: 20px;
  }

  .day-suffix {
    display: none;
  }

  .timetable {
    min-width: unset !important;
    table-layout: fixed;
  }

  .th-day,
  .td-class {
    min-width: unset !important;
  }

  .td-class {
    padding: 3px;
  }

  .class-card {
    padding: 8px 6px;
    gap: 3px;
  }

  .class-name {
    word-break: break-all;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    line-clamp: 3;
    -webkit-box-orient: vertical;
  }

  .class-meta {
    display: none;
  }

  .class-attendance-badge {
    margin-left: 2px;
  }

  .badge {
    font-size: 8px;
    padding: 1px 3px;
  }

  .add-class-btn {
    font-size: 18px;
    min-height: var(--cell-min-h);
  }
}

@media (max-width: 480px) {
  :root {
    --cell-min-h: 80px;
  }

  .main-content {
    padding: 6px 4px;
  }

  .td-period {
    padding: 6px 2px;
  }

  .period-number {
    font-size: 15px;
  }

  .period-number-label {
    font-size: 8px;
    margin-bottom: 2px;
  }

  .period-time {
    font-size: 8px;
    line-height: 1.25;
  }
}