:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --success: #10b981;
  --paused: #f59e0b;
  --done: #6366f1;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI",
    "Meiryo", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; font-size: 14px; }

/* ===== ログイン画面 ===== */
.login-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.login-card {
  background: var(--card);
  padding: 40px 32px;
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 360px;
}
.login-title {
  margin: 0 0 8px;
  font-size: 24px;
  text-align: center;
}
.login-sub {
  margin: 0 0 24px;
  color: var(--muted);
  text-align: center;
  font-size: 14px;
}
.login-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.login-form input {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
  transition: border-color 0.15s;
}
.login-form input:focus { border-color: var(--primary); }
.login-form button {
  padding: 12px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 14px;
  transition: background 0.15s;
}
.login-form button:hover { background: var(--primary-hover); }
.error {
  color: var(--danger);
  font-size: 13px;
  min-height: 18px;
  margin: 0;
  text-align: center;
}

/* ===== トップバー ===== */
.topbar {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: var(--shadow);
}
.topbar-title {
  margin: 0;
  font-size: 18px;
  flex: 1;
}
.topbar-actions {
  display: flex;
  gap: 8px;
}
.back-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}
.back-link:hover { color: var(--text); }

/* ===== ボタン ===== */
.primary-btn,
.ghost-btn,
.danger-btn {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: all 0.15s;
}
.primary-btn { background: var(--primary); color: #fff; }
.primary-btn:hover { background: var(--primary-hover); }
.ghost-btn { background: transparent; color: var(--text); border-color: var(--border); }
.ghost-btn:hover { background: var(--bg); }
.danger-btn { background: transparent; color: var(--danger); border-color: var(--border); }
.danger-btn:hover { background: var(--danger); color: #fff; border-color: var(--danger); }

/* ===== コンテナ ===== */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}

/* ===== カードグリッド ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.project-card {
  background: var(--card);
  border-radius: 12px;
  padding: 20px;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  display: flex;
  flex-direction: column;
  gap: 12px;
  border: 1px solid var(--border);
}
.project-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
}
.card-title {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  flex: 1;
}
.card-desc {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  min-height: 38px;
}
.card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--muted);
}

/* ===== ステータスバッジ ===== */
.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
}
.badge-active { background: #d1fae5; color: #065f46; }
.badge-paused { background: #fef3c7; color: #92400e; }
.badge-done   { background: #e0e7ff; color: #3730a3; }

/* ===== プログレスバー ===== */
.progress-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}
.progress-bar {
  flex: 1;
  height: 8px;
  background: var(--border);
  border-radius: 999px;
  overflow: hidden;
}
.progress-bar span {
  display: block;
  height: 100%;
  background: var(--primary);
  transition: width 0.3s;
  width: 0;
}
.progress-text {
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
}

/* ===== Empty state ===== */
.empty-state {
  text-align: center;
  color: var(--muted);
  padding: 60px 20px;
  font-size: 14px;
}

/* ===== モーダル ===== */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  z-index: 100;
}
.modal[hidden] { display: none; }
.modal-card {
  background: var(--card);
  border-radius: 12px;
  padding: 24px;
  width: 100%;
  max-width: 440px;
  box-shadow: var(--shadow-lg);
}
.modal-card h2 {
  margin: 0 0 16px;
  font-size: 18px;
}
.modal-card form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.modal-card label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}
.modal-card input,
.modal-card textarea,
.modal-card select {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
  color: var(--text);
}
.modal-card input:focus,
.modal-card textarea:focus,
.modal-card select:focus { border-color: var(--primary); }
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 4px;
}

/* ===== プロジェクト詳細 ===== */
.project-meta {
  background: var(--card);
  padding: 20px 24px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  margin-bottom: 24px;
  border: 1px solid var(--border);
}
.meta-row { margin-bottom: 8px; font-size: 14px; }
.meta-label { color: var(--muted); }
.project-desc {
  margin: 8px 0 16px;
  color: var(--text);
  font-size: 14px;
  white-space: pre-wrap;
}

/* ===== タスクセクション ===== */
.tasks-section {
  background: var(--card);
  padding: 20px 24px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.section-title {
  margin: 0 0 16px;
  font-size: 16px;
}
.task-form {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}
.task-form input {
  flex: 1;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  outline: none;
}
.task-form input:focus { border-color: var(--primary); }

.task-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.task-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 8px;
  border-radius: 8px;
  transition: background 0.15s;
}
.task-item:hover { background: var(--bg); }
.task-item input[type="checkbox"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--primary);
}
.task-title {
  flex: 1;
  font-size: 14px;
}
.task-item.done .task-title {
  text-decoration: line-through;
  color: var(--muted);
}
.task-delete {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 18px;
  padding: 4px 8px;
  border-radius: 4px;
  transition: all 0.15s;
}
.task-delete:hover {
  color: var(--danger);
  background: rgba(220, 38, 38, 0.08);
}

/* ===== GitHub関連 ===== */
.repo-pill {
  display: inline-block;
  font-size: 12px;
  color: var(--muted);
  background: var(--bg);
  padding: 2px 8px;
  border-radius: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 100%;
}
.repo-link {
  font-size: 13px;
  color: var(--primary);
  text-decoration: none;
  margin-left: 8px;
}
.repo-link:hover { text-decoration: underline; }

.card-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: var(--muted);
}
.card-sync {
  font-size: 11px;
  color: var(--muted);
}
.sync-error-pill {
  color: var(--danger);
  font-weight: 500;
}

.github-stats {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  padding: 12px;
  background: var(--bg);
  border-radius: 8px;
}
.stat-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.stat-label {
  font-size: 11px;
  color: var(--muted);
}
.stat-value {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}
.sync-error {
  grid-column: 1 / -1;
  color: var(--danger);
  font-size: 13px;
  padding-top: 4px;
  border-top: 1px solid var(--border);
}

/* ===== タスクタグ ===== */
.task-tag {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  font-weight: 500;
}
.tag-github { background: #e0e7ff; color: #3730a3; }
.tag-manual { background: var(--bg); color: var(--muted); }
.task-title[href] {
  color: var(--primary);
  text-decoration: none;
}
.task-title[href]:hover { text-decoration: underline; }

/* ===== README ===== */
.readme-section {
  background: var(--card);
  padding: 20px 24px;
  border-radius: 12px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  margin-top: 24px;
}
.readme-content {
  white-space: pre-wrap;
  word-wrap: break-word;
  font-family: ui-monospace, "SF Mono", "Menlo", "Monaco", monospace;
  font-size: 13px;
  background: var(--bg);
  padding: 16px;
  border-radius: 8px;
  max-height: 600px;
  overflow-y: auto;
  margin: 0;
  line-height: 1.6;
}

/* ===== レスポンシブ ===== */
@media (max-width: 600px) {
  .topbar { padding: 12px 16px; }
  .container { padding: 16px; }
  .topbar-title { font-size: 16px; }
  .login-card { padding: 32px 24px; }
}