:root {
  --primary: #1976d2;
  --primary-light: #42a5f5;
  --primary-dark: #1565c0;
  --secondary: #26a69a;
  --success: #4caf50;
  --warning: #ff9800;
  --error: #f44336;
  --background: #f5f5f5;
  --surface: #ffffff;
  --surface-variant: #f8f9fa;
  --text-primary: #212121;
  --text-secondary: #757575;
  --text-disabled: #bdbdbd;
  --border: #e0e0e0;
  --border-light: #f0f0f0;
  --shadow: 0 2px 8px rgba(0,0,0,0.1);
  --shadow-hover: 0 4px 16px rgba(0,0,0,0.15);
  --radius: 8px;
  --radius-lg: 12px;
}

* { box-sizing: border-box; }
html, body { 
  height: 100%; 
  margin: 0; 
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
  background-color: var(--background);
  color: var(--text-primary);
}

.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px;
  box-shadow: var(--shadow);
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 18px;
}

.brand-text h1 {
  margin: 0;
  font-size: 20px;
  font-weight: 600;
  color: var(--text-primary);
}

.brand-text .subtitle {
  margin: 0;
  font-size: 14px;
  color: var(--text-secondary);
}

.header-actions {
  display: flex;
  gap: 8px;
}

.main-content {
  flex: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
  width: 100%;
}

.section {
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
}

.section-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-light);
}

.section-icon {
  width: 20px;
  height: 20px;
  color: var(--primary);
}

.section-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 16px;
  margin-bottom: 16px;
}

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

.form-group.horizontal {
  flex-direction: row;
  align-items: center;
  gap: 12px;
}

.form-group.horizontal label {
  min-width: 120px;
  margin-bottom: 0;
}

.form-group.horizontal input {
  flex: 1;
}

/* 确保随机下浮系数范围输入组有足够空间 */
.form-group:has(.input-group) {
  grid-column: span 1;
}

/* 在小屏幕上确保输入组不会重叠 */
@media (max-width: 1024px) {
  .form-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  }
}

label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 6px;
}

input, select {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
  background: var(--surface);
}

input:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.1);
}

.input-group {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
}

.input-group input {
  flex: 1;
  min-width: 0;
}

.input-group span {
  flex-shrink: 0;
  color: var(--text-secondary);
  font-weight: 500;
}

.button-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

button {
  padding: 10px 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  display: flex;
  align-items: center;
  gap: 6px;
}

.btn-primary {
  background: var(--primary);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: var(--shadow-hover);
}

.btn-secondary {
  background: var(--secondary);
  color: white;
}

.btn-secondary:hover {
  background: #1e7d72;
  box-shadow: var(--shadow-hover);
}

.btn-success {
  background: var(--success);
  color: white;
}

.btn-success:hover {
  background: #388e3c;
  box-shadow: var(--shadow-hover);
}

.btn-warning {
  background: var(--warning);
  color: white;
}

.btn-warning:hover {
  background: #f57c00;
  box-shadow: var(--shadow-hover);
}

.btn-danger {
  background: var(--error);
  color: white;
}

.btn-danger:hover {
  background: #d32f2f;
  box-shadow: var(--shadow-hover);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: white;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.result-item {
  background: var(--surface-variant);
  padding: 16px;
  border-radius: var(--radius);
  text-align: center;
}

.result-label {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.result-value {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
}

.table-container {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
}

th {
  background: var(--surface-variant);
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  font-size: 14px;
  color: var(--text-primary);
  border-bottom: 1px solid var(--border);
}

td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
  font-size: 14px;
}

tr:hover {
  background: var(--surface-variant);
}

.text-muted {
  color: var(--text-secondary);
  font-size: 12px;
}

.icon {
  width: 16px;
  height: 16px;
}

.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 14px;
}

.alert-error {
  background: #ffebee;
  color: #c62828;
  border: 1px solid #ffcdd2;
}

.alert-success {
  background: #e8f5e8;
  color: #2e7d32;
  border: 1px solid #c8e6c9;
}

.table-input {
  width: 100%;
  padding: 4px 6px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 12px;
  background: var(--surface);
}

.table-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(25, 118, 210, 0.1);
}

.score-display {
  font-weight: 600;
  color: var(--primary);
}

@media (max-width: 1200px) {
  .form-grid {
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  }
}

@media (max-width: 768px) {
  .main-content {
    padding: 16px;
  }
  
  .form-grid {
    grid-template-columns: 1fr;
  }
  
  .button-group {
    flex-direction: column;
  }
  
  .results-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .input-group {
    flex-direction: column;
    align-items: stretch;
  }
  
  .input-group span {
    text-align: center;
    padding: 4px 0;
  }
}