/* ============================================
   MODERN SAMPLE CHART SECTION
   ============================================ */

.sample-chart {
  padding: var(--spacing-2xl) var(--spacing-md);
  background: var(--bg-tertiary);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.sample-chart::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gradient-primary);
  opacity: 0.3;
}

.sample-chart h2 {
  margin-bottom: var(--spacing-lg);
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 800;
  animation: fadeInUp 0.6s ease-out;
}

.sample-chart p {
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
  max-width: 800px;
  margin: 0 auto var(--spacing-xl);
  line-height: 1.7;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

/* ============================================
   CHART BAR
   ============================================ */
.chart-bar {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: var(--spacing-lg);
  border-radius: var(--radius-xl);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-color);
  animation: fadeInUp 0.6s ease-out 0.4s both;
}

/* ============================================
   CHART CONTROLS
   ============================================ */
.chart-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
}

/* ============================================
   CONTROL GROUPS
   ============================================ */
.control-group {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs);
  background: var(--bg-primary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-color);
  transition: all var(--transition-fast);
}

.control-group:hover {
  border-color: var(--primary-light);
  box-shadow: var(--shadow-sm);
}

.control-group label {
  font-weight: 600;
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  white-space: nowrap;
}

/* ============================================
   RADIO GROUP
   ============================================ */
.radio-group {
  gap: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
}

.radio-group label {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  cursor: pointer;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-md);
}

.radio-group label:hover {
  color: var(--primary-color);
  background: rgba(30, 64, 175, 0.05);
}

.radio-group input[type="radio"] {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--primary-color);
}

.radio-group input[type="radio"]:checked + span,
.radio-group label:has(input[type="radio"]:checked) {
  color: var(--primary-color);
  font-weight: 600;
}

/* ============================================
   DATE RANGE GROUP
   ============================================ */
.date-range-group {
  gap: var(--spacing-sm);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  padding: var(--spacing-sm) var(--spacing-md);
}

.date-label {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}

.date-input {
  width: 140px;
  padding: 10px 14px;
  font-size: var(--font-size-sm);
  border-radius: var(--radius-md);
  border: 2px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: all var(--transition-base);
  outline: none;
}

.date-input:hover {
  border-color: var(--border-hover);
}

.date-input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(30, 64, 175, 0.1);
}

/* ============================================
   MODERN SELECT
   ============================================ */
.modern-select {
  padding: 10px 16px;
  border-radius: var(--radius-md);
  border: 2px solid var(--border-color);
  font-size: var(--font-size-sm);
  background: var(--bg-primary);
  color: var(--text-primary);
  transition: all var(--transition-base);
  cursor: pointer;
  outline: none;
  appearance: none;
  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='%236366f1' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 40px;
  font-weight: 500;
  min-width: 150px;
}

.modern-select:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-sm);
}

.modern-select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(30, 64, 175, 0.1);
}

/* ============================================
   SMALL BUTTON
   ============================================ */
.btn.small-btn {
  font-size: var(--font-size-sm);
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}

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

.btn.small-btn.primary {
  background: var(--gradient-primary);
  color: #fff;
}

.btn.small-btn.primary:hover {
  box-shadow: var(--shadow-md), var(--shadow-colored);
}

/* ============================================
   CHART CONTAINER
   ============================================ */
.chart-container {
  max-width: 1000px;
  margin: var(--spacing-lg) auto 0;
  padding: var(--spacing-lg);
  background: var(--bg-primary);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-color);
  animation: fadeInUp 0.6s ease-out 0.6s both;
  position: relative;
  min-height: 400px;
  height: auto;
}

.chart-container canvas {
  width: 100% !important;
  max-width: 100% !important;
  height: 400px !important;
  max-height: 400px !important;
  display: block;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
  .sample-chart {
    padding: var(--spacing-xl) var(--spacing-md);
  }
  
  .chart-bar {
    padding: var(--spacing-md);
  }
  
  .chart-controls {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-sm);
  }
  
  .control-group {
    flex-direction: column;
    align-items: stretch;
  }
  
  .date-range-group {
    flex-direction: column;
    align-items: stretch;
  }
  
  .date-input {
    width: 100%;
  }
  
  .modern-select {
    width: 100%;
    min-width: auto;
  }
  
  .chart-container {
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
  }
}