:root {
  --color-bg: #000000;
  --color-surface: #121212;
  --color-surface-alt: #1e1e22;
  --color-border: #333338;
  --color-text: #ffffff;
  --color-text-muted: #a1a1aa;
  --color-primary: #6690ff;
  --color-primary-hover: #85a5ff;
  --color-danger: #ff6b6b;
  --color-danger-hover: #ff8787;
  --color-success: #69db7c;
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", "Segoe UI", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
}

.app-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 16px 24px;
}

.app-header h1 {
  margin: 0;
  font-size: 1.4rem;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 24px;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}

.card h2 {
  margin-top: 0;
  font-size: 1.05rem;
}

.dashboard {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  text-align: center;
}

@media (max-width: 720px) {
  .stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 8px;
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
}

.stat-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.latest-reflection {
  border-top: 1px solid var(--color-border);
  padding-top: 14px;
}

.latest-reflection h3 {
  margin: 0 0 6px;
  font-size: 0.95rem;
}

.reflection-week {
  margin: 0 0 4px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.reflection-comment {
  margin: 0;
  white-space: pre-wrap;
  font-size: 0.92rem;
}

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

.add-card,
.list-card {
  display: flex;
  flex-direction: column;
}

.add-card form {
  flex: 1;
}

.list-card .list {
  flex: 1;
}

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

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

form label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 6px;
}

form input,
form textarea {
  background: var(--color-surface-alt);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 0.95rem;
  font-family: inherit;
  resize: vertical;
}

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

form input:focus,
form textarea:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

form button {
  margin-top: 10px;
  align-self: flex-start;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 9px 18px;
  font-size: 0.9rem;
  cursor: pointer;
}

form button:hover {
  background: var(--color-primary-hover);
}

.list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.list-item {
  background: var(--color-surface-alt);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 12px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
}

.note-title {
  font-weight: 600;
  margin: 0 0 4px;
}

.note-content {
  margin: 0 0 8px;
  white-space: pre-wrap;
  color: var(--color-text);
  font-size: 0.92rem;
}

.item-meta {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.task-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.task-main {
  flex: 1;
  min-width: 0;
}

.task-title {
  font-size: 0.95rem;
  word-break: break-word;
}

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

.task-checkbox {
  margin-top: 3px;
  width: 18px;
  height: 18px;
  cursor: pointer;
  flex-shrink: 0;
}

.badge {
  display: inline-block;
  font-size: 0.72rem;
  padding: 2px 8px;
  border-radius: 999px;
  margin-left: 6px;
}

.badge.done {
  background: rgba(105, 219, 124, 0.15);
  color: var(--color-success);
}

.badge.pending {
  background: rgba(255, 169, 77, 0.15);
  color: #ffa94d;
}

.delete-btn {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-danger);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 0.78rem;
  cursor: pointer;
  flex-shrink: 0;
}

.delete-btn:hover {
  background: var(--color-danger);
  color: #fff;
  border-color: var(--color-danger);
}

.empty-message {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  margin: 0;
}

.hidden {
  display: none !important;
}