body {
  font-family: Arial, "Microsoft YaHei", sans-serif;
  background-image: url("images/bg.png");
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  margin: 0;
  padding: 40px;
  color: #222;
}

.container {
  max-width: 900px;
  margin: 0 auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 30px;
}

h1 {
  font-size: 36px;
  margin: 0 0 10px;
}

.subtitle {
  font-size: 18px;
  color: #666;
  margin: 0;
}

.card-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.card {
  background: rgba(255, 255, 255, 0.85);
  border: 1px solid #ddd;
  padding: 24px;
  border-radius: 12px;
  margin-bottom: 20px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.card-link .card {
  cursor: pointer;
}

.card-link .card:hover {
  background: rgba(255, 255, 255, 0.95);
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
}

.card h2 {
  margin-top: 0;
}

.button {
  display: inline-block;
  border: 1px solid #bbb;
  border-radius: 8px;
  padding: 9px 14px;
  background: rgba(255, 255, 255, 0.78);
  color: #222;
  text-decoration: none;
  font-size: 14px;
}

.button:hover {
  background: rgba(255, 255, 255, 0.95);
}

.login-page {
  min-height: 100vh;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  justify-content: center;
}

.login-card {
  width: 100%;
  max-width: 380px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid #ddd;
  border-radius: 12px;
  padding: 28px;
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
}

.login-card h1 {
  font-size: 30px;
}

.form-row {
  margin-top: 18px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-weight: bold;
}

input {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid #bbb;
  border-radius: 8px;
  padding: 12px;
  font-size: 16px;
}

textarea {
  width: 100%;
  min-height: 140px;
  box-sizing: border-box;
  border: 1px solid #bbb;
  border-radius: 8px;
  padding: 12px;
  resize: vertical;
  font: inherit;
  line-height: 1.6;
}

button {
  width: 100%;
  border: 0;
  border-radius: 8px;
  padding: 12px;
  margin-top: 22px;
  background: #222;
  color: white;
  font-size: 16px;
  cursor: pointer;
}

.editor-card {
  transition: none;
}

.section-heading,
.records-heading,
.record-header,
.form-actions,
.record-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.section-heading h2,
.records-heading h2 {
  margin: 0;
}

.section-note {
  margin: 6px 0 0;
  color: #666;
  font-size: 14px;
}

.form-grid {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 16px;
}

.form-actions {
  justify-content: flex-start;
  margin-top: 20px;
}

.primary-button,
.secondary-button,
.icon-text-button {
  width: auto;
  margin: 0;
}

.primary-button {
  min-width: 120px;
}

.secondary-button,
.icon-text-button {
  border: 1px solid #bbb;
  background: rgba(255, 255, 255, 0.8);
  color: #222;
}

.secondary-button:hover,
.icon-text-button:hover {
  background: white;
}

.form-message {
  min-height: 20px;
  margin: 12px 0 0;
  font-size: 14px;
}

.success-message {
  color: #176b38;
}

.error-text {
  color: #b00020;
}

.records-section {
  margin-top: 28px;
}

.records-heading {
  margin-bottom: 14px;
}

.record-count {
  color: #555;
  font-size: 14px;
}

.record-list,
.training-list {
  display: grid;
  gap: 12px;
}

.record-item,
.training-record {
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid #ddd;
  border-radius: 8px;
  padding: 20px;
}

.record-item time,
.training-record time {
  color: #666;
  font-size: 14px;
}

.record-item h3,
.training-record h3 {
  margin: 5px 0 0;
  font-size: 20px;
}

.record-actions {
  flex-shrink: 0;
}

.icon-text-button {
  padding: 8px 11px;
  font-size: 14px;
}

.danger-button {
  border-color: #d8a3a3;
  color: #a51d1d;
}

.record-content {
  margin: 16px 0 0;
  white-space: pre-wrap;
  line-height: 1.7;
}

.empty-state {
  box-sizing: border-box;
  margin: 0;
  padding: 28px;
  border: 1px dashed rgba(70, 70, 70, 0.35);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  text-align: center;
}

button:hover {
  background: #000;
}

.error {
  display: none;
  margin-top: 16px;
  color: #b00020;
}

.error.visible {
  display: block;
}

li {
  margin-bottom: 10px;
}

@media (max-width: 640px) {
  body {
    padding: 24px;
  }

  h1 {
    font-size: 30px;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .form-grid {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .record-header {
    align-items: flex-start;
    flex-direction: column;
  }
}