:root {
  --bg: #eef1f8;
  --card-bg: #ffffff;
  --item-bg: #f7f8fc;
  --text: #1c2333;
  --sub: #6b7280;
  --accent: #4f5fed;
  --accent-dark: #3d4bd1;
  --accent-soft: #eef0fe;
  --border: #e4e7f0;
  --done: #a3a9b8;
  --danger: #e15c5c;
  --danger-soft: #fdecec;
  --shadow-sm: 0 1px 2px rgba(24, 30, 61, 0.05);
  --shadow-md: 0 8px 24px rgba(24, 30, 61, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  background: linear-gradient(180deg, #eef1f8 0%, #e7eaf5 100%);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 940px;
  margin: 0 auto;
  padding: 40px 20px 70px;
}

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

h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
}

.app-subtitle {
  margin: 6px 0 0;
  color: var(--sub);
  font-size: 0.92rem;
}

.dashboard {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 32px;
}

.stat-row {
  display: flex;
  gap: 14px;
}

.stat-card {
  flex: 1;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  text-align: left;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

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

.stat-value {
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--sub);
  margin-top: 6px;
  font-weight: 500;
}

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

@media (max-width: 700px) {
  .columns { grid-template-columns: 1fr; }
  .stat-row { flex-wrap: wrap; }
  .stat-row .stat-card { flex: 1 1 calc(50% - 7px); }
}

.latest-reflection {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  border-radius: 14px;
  padding: 18px 20px;
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.latest-reflection-label {
  font-size: 0.78rem;
  font-weight: 600;
  opacity: 0.85;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.latest-reflection-week {
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: 6px;
  opacity: 0.95;
}

.latest-reflection-comment {
  margin-top: 6px;
  font-size: 1rem;
  line-height: 1.5;
  white-space: pre-wrap;
}

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

.reflection-form input[type="week"] {
  align-self: flex-start;
}

.panel {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px;
  box-shadow: var(--shadow-sm);
}

.panel h2 {
  margin: 0 0 16px;
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.panel h2::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

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

.form input:focus, .form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  background: var(--card-bg);
}

.form input::placeholder, .form textarea::placeholder {
  color: #9aa0b4;
}

.form button {
  align-self: flex-start;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 9px 18px;
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(79, 95, 237, 0.28);
  transition: background 0.15s ease, transform 0.1s ease;
}

.form button:hover {
  background: var(--accent-dark);
}

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

.list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 480px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

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

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

.item {
  background: var(--item-bg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 10px;
  padding: 12px 14px;
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

.item:hover {
  box-shadow: var(--shadow-sm);
}

.item.done {
  border-left-color: var(--done);
  background: #f2f3f7;
}

.item-title {
  font-weight: 600;
  font-size: 0.95rem;
}

.item-body {
  margin-top: 5px;
  font-size: 0.88rem;
  white-space: pre-wrap;
  color: var(--sub);
  line-height: 1.5;
}

.item-meta {
  margin-top: 10px;
  font-size: 0.74rem;
  color: var(--sub);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

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

.item-actions {
  display: flex;
  gap: 6px;
}

.item-actions button {
  border: 1px solid var(--border);
  background: var(--card-bg);
  color: var(--text);
  border-radius: 8px;
  padding: 4px 10px;
  cursor: pointer;
  font-size: 0.72rem;
  font-weight: 500;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.item-actions button:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent-dark);
}

.item-actions button[data-action="delete"]:hover {
  background: var(--danger-soft);
  border-color: var(--danger);
  color: var(--danger);
}

.empty {
  color: var(--sub);
  font-size: 0.85rem;
  text-align: center;
  padding: 24px 0;
}