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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f0f4f8;
  color: #1e293b;
  min-height: 100vh;
  padding: 16px;
}

.container {
  max-width: 700px;
  margin: 0 auto;
}

h1 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #1e293b;
  margin-bottom: 20px;
  text-align: center;
}

h2 {
  font-size: 1rem;
  font-weight: 600;
  color: #475569;
  margin-bottom: 12px;
}

/* フォーム */
.form-section {
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 14px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

label {
  font-size: 0.8rem;
  font-weight: 600;
  color: #64748b;
}

input[type="date"],
input[type="time"],
input[type="month"] {
  padding: 8px 10px;
  border: 1.5px solid #cbd5e1;
  border-radius: 8px;
  font-size: 0.95rem;
  color: #1e293b;
  background: #fff;
  outline: none;
  transition: border-color 0.2s;
  width: 100%;
}

input[type="date"]:focus,
input[type="time"]:focus,
input[type="month"]:focus {
  border-color: #2563eb;
}

.btn-primary {
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 10px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  transition: background 0.2s;
}

.btn-primary:hover {
  background: #1d4ed8;
}

.btn-secondary {
  background: #e2e8f0;
  color: #475569;
  border: none;
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-secondary:hover {
  background: #cbd5e1;
}

.error-msg {
  color: #dc2626;
  font-size: 0.82rem;
  margin-top: 8px;
  min-height: 18px;
}

/* フィルター */
.filter-section {
  background: #fff;
  border-radius: 12px;
  padding: 14px 20px;
  margin-bottom: 16px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.filter-section label {
  font-size: 0.85rem;
  white-space: nowrap;
}

/* サマリー */
.summary-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.summary-card {
  background: #2563eb;
  color: #fff;
  border-radius: 12px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  box-shadow: 0 2px 8px rgba(37,99,235,0.25);
}

.summary-label {
  font-size: 0.78rem;
  opacity: 0.85;
}

.summary-value {
  font-size: 1.4rem;
  font-weight: 700;
}

/* 一覧 */
.list-section {
  background: #fff;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.08);
}

.record-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.empty-msg {
  color: #94a3b8;
  text-align: center;
  padding: 20px 0;
  font-size: 0.9rem;
}

.record-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #f8fafc;
  border: 1.5px solid #e2e8f0;
  border-radius: 10px;
  padding: 12px 14px;
  gap: 8px;
}

.record-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.record-date {
  font-weight: 700;
  font-size: 0.95rem;
}

.record-times {
  font-size: 0.82rem;
  color: #64748b;
}

.record-overtime {
  font-size: 0.88rem;
  font-weight: 600;
}

.overtime-positive {
  color: #dc2626;
}

.overtime-zero {
  color: #64748b;
}

.delete-btn {
  background: none;
  border: 1.5px solid #e2e8f0;
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 0.8rem;
  color: #94a3b8;
  cursor: pointer;
  transition: border-color 0.2s, color 0.2s;
  white-space: nowrap;
}

.delete-btn:hover {
  border-color: #dc2626;
  color: #dc2626;
}

/* スマホ対応 */
@media (max-width: 480px) {
  .form-grid {
    grid-template-columns: 1fr;
  }

  .summary-section {
    grid-template-columns: 1fr 1fr;
  }

  .summary-value {
    font-size: 1.15rem;
  }

  .record-item {
    flex-wrap: wrap;
  }
}