:root {
  --color-bg: #eef1f7;
  --color-bg-accent: #e4e9f7;
  --color-surface: #ffffff;
  --color-surface-alt: #f6f8fc;
  --color-border: #e3e7ef;
  --color-border-strong: #d6dcea;
  --color-text: #1f2430;
  --color-text-muted: #6b7280;
  --color-text-faint: #9aa2b1;
  --color-primary: #4f46e5;
  --color-primary-dark: #4338ca;
  --color-primary-light: #eef0fe;
  --color-danger: #e0524a;
  --color-danger-light: #fdecec;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(31, 36, 48, 0.06);
  --shadow-md: 0 4px 16px rgba(31, 36, 48, 0.08);
  --shadow-lg: 0 12px 32px rgba(31, 36, 48, 0.10);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", "Meiryo", sans-serif;
  background:
    radial-gradient(circle at 10% -10%, var(--color-bg-accent) 0%, transparent 45%),
    var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 40px 20px 70px;
}

/* ---- ヘッダー ---- */

.app-header {
  margin-bottom: 28px;
}

.app-title {
  display: flex;
  align-items: center;
  gap: 14px;
}

.app-icon {
  font-size: 2rem;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

h1 {
  font-size: 1.55rem;
  font-weight: 700;
  margin: 0;
  letter-spacing: 0.01em;
}

.app-subtitle {
  margin: 2px 0 0;
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

/* ---- ダッシュボード ---- */

.dashboard {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.stat-icon {
  font-size: 1.4rem;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  background: var(--color-primary-light);
}

.stat-card.accent .stat-icon {
  background: #fff1e9;
}

.stat-value {
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.1;
}

.stat-card.accent .stat-value {
  color: #d2691e;
}

.stat-label {
  margin-top: 2px;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* ---- 最新の振り返り ---- */

.latest-reflection {
  background: linear-gradient(135deg, var(--color-primary) 0%, #7c6ef0 100%);
  border-radius: var(--radius-lg);
  padding: 18px 22px;
  color: #fff;
  box-shadow: var(--shadow-md);
  margin-bottom: 28px;
}

.latest-reflection-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 8px;
}

.latest-reflection-week {
  margin-left: auto;
  font-size: 0.76rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.2);
  padding: 3px 10px;
  border-radius: 999px;
}

.latest-reflection-text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.92);
  white-space: pre-wrap;
  word-break: break-word;
}

/* ---- レイアウト ---- */

.columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

@media (max-width: 720px) {
  .columns {
    grid-template-columns: 1fr;
  }
  .dashboard {
    grid-template-columns: 1fr;
  }
}

.panel {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.panel h2 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  font-size: 1.05rem;
  font-weight: 700;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
}

.panel-icon {
  font-size: 1.05rem;
}

/* ---- フォーム ---- */

.form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

.form input,
.form textarea {
  padding: 10px 12px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  background: var(--color-surface-alt);
  font-size: 0.92rem;
  font-family: inherit;
  color: var(--color-text);
  resize: vertical;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.form input::placeholder,
.form textarea::placeholder {
  color: var(--color-text-faint);
}

.form input:focus,
.form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  background: var(--color-surface);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
}

.form button {
  align-self: flex-start;
  padding: 9px 20px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.25);
  transition: background 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease;
}

.form button:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.32);
}

.form button:active {
  transform: translateY(1px);
}

/* ---- 一覧 ---- */

.list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 480px;
  overflow-y: auto;
  padding-right: 2px;
}

.list::-webkit-scrollbar {
  width: 8px;
}

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

.list::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: 8px;
}

.item {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  transition: box-shadow 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.item:hover {
  background: var(--color-surface);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

.item-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 4px;
  word-break: break-word;
}

.item-body {
  white-space: pre-wrap;
  color: var(--color-text-muted);
  font-size: 0.87rem;
  line-height: 1.5;
  margin-bottom: 8px;
  word-break: break-word;
}

.item-meta {
  font-size: 0.74rem;
  color: var(--color-text-faint);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.item-actions {
  display: flex;
  gap: 4px;
}

.item-actions button {
  border: none;
  background: transparent;
  cursor: pointer;
  font-size: 0.76rem;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: 6px;
  color: var(--color-primary);
  transition: background 0.15s ease;
}

.item-actions button:hover {
  background: var(--color-primary-light);
}

.item-actions .delete-btn {
  color: var(--color-danger);
}

.item-actions .delete-btn:hover {
  background: var(--color-danger-light);
}

/* ---- タスク ---- */

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

.task-row input[type="checkbox"] {
  appearance: none;
  width: 19px;
  height: 19px;
  flex-shrink: 0;
  border: 1.5px solid var(--color-border-strong);
  border-radius: 6px;
  background: var(--color-surface);
  cursor: pointer;
  position: relative;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.task-row input[type="checkbox"]:hover {
  border-color: var(--color-primary);
}

.task-row input[type="checkbox"]:checked {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.task-row input[type="checkbox"]:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border: solid #fff;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.task-text {
  flex: 1;
  font-size: 0.92rem;
  word-break: break-word;
}

.task-item.done {
  background: transparent;
  border-style: dashed;
}

.task-item.done .task-text {
  text-decoration: line-through;
  color: var(--color-text-faint);
}

/* ---- 週次振り返りパネル ---- */

.reflection-panel {
  margin-top: 20px;
}

.reflection-current-week {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.reflection-panel textarea {
  min-height: 90px;
}

/* ---- 空状態 ---- */

.empty {
  color: var(--color-text-faint);
  font-size: 0.88rem;
  text-align: center;
  padding: 28px 0;
  border: 1px dashed var(--color-border-strong);
  border-radius: var(--radius-md);
}