/* 组件样式 - Apple Design 风格 */

/* 按钮 - Apple 风格 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-lg);
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.2px;
  cursor: pointer;
  transition: all var(--transition-fast) var(--ease-out);
  text-align: center;
  text-decoration: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:active::before {
  width: 300px;
  height: 300px;
}

.btn:active {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn-primary {
  background-color: var(--system-blue);
  color: var(--text-inverse);
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--system-blue-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: var(--background-tertiary);
  color: var(--text-primary);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--separator-opaque);
  transform: translateY(-1px);
}

.btn-danger {
  background-color: var(--system-red);
  color: var(--text-inverse);
}

.btn-danger:hover:not(:disabled) {
  background-color: #D70015;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-outline {
  background-color: transparent;
  border: 1.5px solid var(--system-blue);
  color: var(--system-blue);
}

.btn-outline:hover:not(:disabled) {
  background-color: rgba(0, 122, 255, 0.1);
  border-color: var(--system-blue-dark);
}

.btn-group {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.btn-toggle {
  flex: 1;
  min-width: 80px;
  background-color: var(--background-tertiary);
  color: var(--text-primary);
}

.btn-toggle:hover {
  background-color: var(--separator-opaque);
}

.btn-toggle.active {
  background-color: var(--system-blue);
  color: var(--text-inverse);
  box-shadow: var(--shadow-sm);
}

/* 卡片 - Apple 风格 */
.card {
  background-color: var(--background-secondary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-md);
  border: 0.5px solid rgba(0, 0, 0, 0.05);
  transition: all var(--transition-base) var(--ease-out);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-section {
  background-color: var(--background-secondary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-md);
  border: 0.5px solid rgba(0, 0, 0, 0.05);
}

.section-title {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.3px;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.section-tip {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.5;
  margin-bottom: var(--spacing-md);
}

.welcome-card {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: var(--text-inverse);
  border-radius: var(--radius-xl);
  padding: var(--spacing-2xl);
  margin-bottom: var(--spacing-lg);
  text-align: center;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.welcome-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  animation: rotate 20s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.welcome-card h1 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.8px;
  margin-bottom: var(--spacing-md);
  position: relative;
  z-index: 1;
}

.intro-text {
  font-size: 17px;
  opacity: 0.95;
  max-width: 800px;
  margin: 0 auto;
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

.trainer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

.trainer-card {
  background-color: var(--background-secondary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  border: 0.5px solid rgba(0, 0, 0, 0.05);
  transition: all var(--transition-base) var(--ease-out);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.trainer-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--system-blue), var(--system-green));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base) var(--ease-out);
}

.trainer-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.trainer-card:hover::before {
  transform: scaleX(1);
}

.trainer-card:active {
  transform: translateY(-2px);
}

.trainer-card h3 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.3px;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.trainer-card p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  font-size: 15px;
  line-height: 1.5;
}

/* 表单 - Apple 风格 */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.label {
  display: block;
  font-weight: 600;
  font-size: 15px;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  letter-spacing: -0.2px;
}

.label-hint {
  font-weight: 400;
  color: var(--text-secondary);
  font-size: 13px;
}

input[type="text"],
input[type="number"],
input[type="range"],
select,
textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--separator-opaque);
  border-radius: var(--radius-md);
  font-size: 17px;
  font-family: inherit;
  background-color: var(--background-secondary);
  color: var(--text-primary);
  transition: all var(--transition-fast) var(--ease-out);
  -webkit-appearance: none;
  appearance: none;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--system-blue);
  box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

input[type="range"] {
  padding: 0;
  height: 4px;
  background: var(--background-tertiary);
  border-radius: 2px;
  -webkit-appearance: none;
  appearance: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--system-blue);
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast) var(--ease-out);
}

input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--system-blue);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23000' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
}

.checkbox-row,
.radio-row {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.checkbox-row label,
.radio-row label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  cursor: pointer;
  font-weight: 400;
  font-size: 17px;
  color: var(--text-primary);
}

input[type="checkbox"],
input[type="radio"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
  accent-color: var(--system-blue);
}

.slider-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

input[type="range"] {
  flex: 1;
}

.slider-value {
  min-width: 60px;
  text-align: right;
  font-weight: 600;
  font-size: 17px;
  color: var(--text-primary);
}

.form-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xl);
  flex-wrap: wrap;
}

.form-actions .btn {
  flex: 1;
  min-width: 120px;
}

/* 麻将牌展示 - Apple 风格 */
.tile-container {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  justify-content: center;
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  border-radius: var(--radius-xl);
  min-height: 200px;
  border: 0.5px solid rgba(0, 0, 0, 0.05);
}

.tile {
  width: 60px;
  height: 84px;
  background-color: var(--background-secondary);
  border: 1px solid var(--separator-opaque);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base) var(--ease-out);
  cursor: pointer;
  position: relative;
}

.tile:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: var(--shadow-md);
  border-color: var(--system-blue);
}

.tile:active {
  transform: translateY(-2px) scale(1.02);
}

.tile img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
}

.tile.selected {
  border-color: var(--system-blue);
  border-width: 2px;
  box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.2), var(--shadow-md);
  transform: translateY(-2px);
}

/* 响应式 */
@media (max-width: 768px) {
  .trainer-grid {
    grid-template-columns: 1fr;
  }
  
  .tile {
    width: 50px;
    height: 70px;
  }
  
  .welcome-card {
    padding: var(--spacing-xl);
  }
  
  .welcome-card h1 {
    font-size: 24px;
  }
  
  .intro-text {
    font-size: 15px;
  }
  
  .btn {
    padding: 10px 20px;
    font-size: 16px;
  }
}