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

body {
  font-family: "Hiragino Sans", "Yu Gothic UI", "Meiryo", sans-serif;
  background: #f0f4f8;
  color: #2d3748;
  min-height: 100vh;
  padding: 16px;
}

.container {
  max-width: 560px;
  margin: 0 auto;
}

.app-title {
  font-size: 1.4rem;
  text-align: center;
  padding: 12px 0 20px;
}

/* ---------- 入力フォーム ---------- */

.task-form {
  background: #fff;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  margin-bottom: 20px;
}

.form-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
  min-width: 120px;
}

.field-name {
  flex: 2 1 100%;
}

.field-label {
  font-size: 0.78rem;
  color: #718096;
}

input[type="text"],
input[type="date"],
select {
  font-size: 16px; /* iOSの自動ズーム防止のため16px以上にする */
  padding: 10px;
  border: 1px solid #cbd5e0;
  border-radius: 8px;
  background: #fff;
  width: 100%;
  max-width: 100%;
  min-width: 0; /* input[type=date]はブラウザ標準UIの内部幅がwidth指定を無視してはみ出すことがあるため明示的に許可する */
}

input:focus,
select:focus {
  outline: 2px solid #4299e1;
  border-color: transparent;
}

.form-error {
  color: #e53e3e;
  font-size: 0.85rem;
  margin-top: 8px;
}

.add-btn {
  width: 100%;
  margin-top: 12px;
  padding: 12px;
  font-size: 1rem;
  font-weight: bold;
  color: #fff;
  background: #4299e1;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

.add-btn:hover {
  background: #3182ce;
}

/* ---------- タスクリスト ---------- */

.task-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.task-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: #fff;
  border-radius: 10px;
  padding: 12px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
}

.task-check {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  cursor: pointer;
}

.priority-badge {
  flex-shrink: 0;
  font-size: 0.72rem;
  font-weight: bold;
  padding: 3px 8px;
  border-radius: 999px;
  color: #fff;
}

.priority-high   { background: #e53e3e; }
.priority-medium { background: #dd6b20; }
.priority-low    { background: #38a169; }

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

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

.task-due {
  font-size: 0.75rem;
  color: #718096;
}

.task-due.overdue {
  color: #e53e3e;
  font-weight: bold;
}

.delete-btn {
  flex-shrink: 0;
  border: none;
  background: transparent;
  color: #a0aec0;
  font-size: 1.1rem;
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
}

.delete-btn:hover {
  color: #e53e3e;
  background: #fff5f5;
}

/* 完了済みタスク：薄く＋打ち消し線 */
.task-item.completed {
  opacity: 0.55;
}

.task-item.completed .task-name {
  text-decoration: line-through;
  color: #718096;
}

/* ---------- 空状態 ---------- */

.empty-message {
  text-align: center;
  color: #a0aec0;
  padding: 32px 16px;
  font-size: 0.9rem;
}

/* ---------- スマホ対応 ---------- */

@media (max-width: 480px) {
  body {
    padding: 10px;
  }

  .form-row {
    flex-direction: column;
  }

  .field {
    width: 100%;
    max-width: 100%;
    min-width: 0;
  }
}