/* 全站共用樣式 - Selenium 教學練習網站 */

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Microsoft JhengHei", "Segoe UI", sans-serif;
  background: #f5f7fa;
  color: #333;
  line-height: 1.6;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
}

h1 {
  color: #2c3e50;
  font-size: 2rem;
  margin-bottom: 8px;
  padding-bottom: 12px;
  border-bottom: 3px solid #4a90d9;
  display: inline-block;
}

h2 {
  color: #2c3e50;
  font-size: 1.4rem;
  margin-bottom: 12px;
}

h3 {
  color: #34495e;
  font-size: 1.1rem;
  margin-bottom: 8px;
}

p {
  margin-bottom: 10px;
}

/* 導航 */
.top-nav {
  margin-bottom: 20px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.top-nav a {
  color: #4a90d9;
  text-decoration: none;
  font-size: 0.95rem;
}

.top-nav a:hover {
  text-decoration: underline;
}

/* 首頁卡片導航 */
.practice-nav {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.nav-card {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  padding: 24px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: block;
}

.nav-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.nav-card h3 {
  font-size: 1.15rem;
  color: #2c3e50;
  margin-bottom: 8px;
}

.nav-card p {
  font-size: 0.9rem;
  color: #666;
  margin: 0;
}

/* Section 區塊 */
section {
  background: #fff;
  border-radius: 10px;
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
}

section h2 {
  padding-bottom: 10px;
  border-bottom: 2px solid #e8ecf0;
  margin-bottom: 16px;
}

/* 表單元素 */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="tel"],
input[type="number"],
input[type="date"],
input[type="search"],
textarea,
select {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 1rem;
  font-family: inherit;
  width: 100%;
  max-width: 400px;
  transition: border-color 0.2s;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: #4a90d9;
  box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.15);
}

textarea {
  resize: vertical;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  color: #444;
}

.form-group {
  margin-bottom: 16px;
}

.form-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

/* 按鈕 */
button {
  padding: 10px 20px;
  background: #4a90d9;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.2s ease;
}

button:hover {
  background: #357abd;
}

button.secondary {
  background: #6c757d;
}

button.secondary:hover {
  background: #545b62;
}

button.danger {
  background: #e74c3c;
}

button.danger:hover {
  background: #c0392b;
}

button.small {
  padding: 6px 12px;
  font-size: 0.85rem;
}

/* 結果文字 */
.result-text {
  color: #2ecc71;
  font-weight: bold;
  margin-top: 8px;
}

/* 訊息樣式 */
.success-msg {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
  border-radius: 6px;
  padding: 12px 16px;
  margin-top: 10px;
}

.error-msg {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
  border-radius: 6px;
  padding: 12px 16px;
  margin-top: 10px;
}

/* 表格 */
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}

th {
  background: #4a90d9;
  color: #fff;
  padding: 10px 12px;
  text-align: left;
  font-size: 0.95rem;
}

td {
  padding: 10px 12px;
  border-bottom: 1px solid #e8ecf0;
  font-size: 0.95rem;
}

tr:nth-child(even) td {
  background: #f8f9fa;
}

tr:hover td {
  background: #eef4fb;
}

/* Modal overlay */
#custom-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

#custom-modal.show {
  display: flex;
}

.modal-content {
  background: #fff;
  border-radius: 12px;
  padding: 30px;
  max-width: 500px;
  width: 90%;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.modal-content h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
  color: #2c3e50;
}

.modal-content p {
  color: #555;
  margin-bottom: 20px;
}

.modal-buttons {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* context-area */
#context-area {
  border: 2px dashed #4a90d9;
  padding: 20px;
  background: #f0f7ff;
  min-height: 100px;
  border-radius: 8px;
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #555;
  cursor: context-menu;
  user-select: none;
}

/* 副標題 */
.subtitle {
  color: #555;
  font-size: 1.05rem;
  margin-bottom: 24px;
}

/* 學生代號顯示 */
.student-badge {
  display: inline-block;
  background: #4a90d9;
  color: #fff;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: bold;
  margin-bottom: 16px;
}

/* 統計區塊 */
.stats-row {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.stat-item {
  background: #f0f7ff;
  border-radius: 8px;
  padding: 12px 20px;
  text-align: center;
}

.stat-item .stat-label {
  font-size: 0.85rem;
  color: #666;
}

.stat-item .stat-value {
  font-size: 1.4rem;
  font-weight: bold;
  color: #4a90d9;
}

/* 響應式 */
@media (max-width: 600px) {
  .container {
    padding: 12px;
  }

  h1 {
    font-size: 1.5rem;
  }

  .practice-nav {
    grid-template-columns: 1fr;
  }

  section {
    padding: 16px;
  }

  input[type="text"],
  input[type="email"],
  input[type="password"],
  input[type="tel"],
  input[type="number"],
  input[type="date"],
  input[type="search"],
  textarea,
  select {
    max-width: 100%;
  }
}