.bd-container{padding:var(--space-4);max-width:1200px;margin:0 auto}.bd-loading,.bd-error{display:flex;align-items:center;justify-content:center;min-height:300px;font-size:var(--text-base);color:var(--text-secondary)}.bd-error{color:#ef4444}.bd-header{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:var(--space-4);flex-wrap:wrap;gap:var(--space-3)}.bd-title{font-size:22px;font-weight:800;margin:0;color:var(--text-primary)}.bd-subtitle{font-size:var(--text-xs);color:var(--text-tertiary);margin:4px 0 0}.bd-period-selector{display:flex;gap:4px;background:var(--surface-2);border-radius:12px;padding:3px}.bd-period-btn{border:none;background:transparent;color:var(--text-secondary);font-size:var(--text-xs);font-weight:500;padding:6px 14px;border-radius:10px;cursor:pointer;transition:background-color .2s,color .2s}.bd-period-btn.active{background:var(--primary-400);color:#fff;font-weight:600}.bd-period-btn:hover:not(.active){background:var(--surface-1)}.bd-summary-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:var(--space-3);margin-bottom:var(--space-4)}.bd-summary-card{background:var(--surface-1);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:var(--space-3) var(--space-4);display:flex;align-items:flex-start;gap:var(--space-3);transition:border-color .2s,transform .2s,box-shadow .2s;border-top:3px solid var(--card-accent, var(--primary-400))}.bd-summary-card:hover{transform:translateY(-2px);box-shadow:0 4px 16px #00000014}.bd-summary-icon{width:40px;height:40px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:color-mix(in srgb,var(--card-accent, var(--primary-400)) 12%,transparent);flex-shrink:0}.bd-summary-body{flex:1;min-width:0}.bd-summary-label{font-size:11px;font-weight:500;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.5px}.bd-summary-value{font-size:26px;font-weight:800;color:var(--text-primary);line-height:1.2;margin:4px 0;font-feature-settings:"tnum"}.bd-summary-change{display:flex;align-items:center;gap:6px;flex-wrap:wrap}.bd-change-badge{display:inline-flex;align-items:center;gap:2px;font-size:11px;font-weight:600;padding:2px 6px;border-radius:6px}.bd-change-badge.positive{background:#dcfce7;color:#16a34a}.bd-change-badge.negative{background:#fef2f2;color:#dc2626}.bd-change-label{font-size:11px;color:var(--text-tertiary)}.bd-chart-card{background:var(--surface-1);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:var(--space-4);margin-bottom:var(--space-4)}.bd-chart-title{font-size:var(--text-base);font-weight:700;margin:0 0 var(--space-3);color:var(--text-primary)}.bd-bar-chart{display:flex;align-items:flex-end;gap:2px;height:220px;padding:0 4px;overflow-x:auto}.bd-bar-chart-sm{height:140px}.bd-bar-col{flex:1;min-width:48px;display:flex;flex-direction:column;align-items:center;gap:4px}.bd-bar-value{font-size:9px;font-weight:600;color:var(--text-tertiary);white-space:nowrap;font-feature-settings:"tnum"}.bd-bar-track{width:100%;max-width:40px;flex:1;display:flex;align-items:flex-end;position:relative}.bd-bar-fill{width:100%;border-radius:6px 6px 2px 2px;position:relative;transition:height .5s cubic-bezier(.4,0,.2,1);min-height:2px}.bd-bar-revenue{background:linear-gradient(180deg,#22c55e,#16a34a)}.bd-bar-students{background:linear-gradient(180deg,#3b82f6,#2563eb)}.bd-bar-ai{background:linear-gradient(180deg,#a855f7,#7c3aed)}.bd-bar-prev{position:absolute;bottom:0;left:0;right:0;border-radius:0 0 2px 2px;background:#ffffff4d;border-top:2px dashed rgba(255,255,255,.6)}.bd-bar-label{font-size:10px;color:var(--text-tertiary);font-weight:500}.bd-yoy-badge{font-size:8px;font-weight:700;padding:1px 4px;border-radius:4px;line-height:1.2}.bd-yoy-badge.positive{background:#dcfce7;color:#16a34a}.bd-yoy-badge.negative{background:#fef2f2;color:#dc2626}.bd-chart-legend{display:flex;gap:16px;margin-top:var(--space-3);padding-top:var(--space-2);border-top:1px solid var(--border-subtle)}.bd-legend-item{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--text-secondary)}.bd-legend-dot{width:10px;height:10px;border-radius:3px}.bd-dot-revenue{background:#22c55e}.bd-dot-prev{background:#22c55e4d;border:1px dashed #22c55e}.bd-dot-students{background:#3b82f6}.bd-dot-new{background:#22c55e}.bd-dot-withdrawn{background:#ef4444}.bd-student-detail{display:flex;gap:3px;min-height:16px}.bd-badge-new,.bd-badge-withdrawn{font-size:8px;font-weight:700;padding:1px 4px;border-radius:4px}.bd-badge-new{background:#dcfce7;color:#16a34a}.bd-badge-withdrawn{background:#fef2f2;color:#dc2626}.bd-ai-stats{display:flex;gap:var(--space-3);margin-bottom:var(--space-3);flex-wrap:wrap}.bd-ai-stat{background:var(--surface-2);border-radius:var(--radius-md);padding:8px 16px;display:flex;flex-direction:column;gap:2px}.bd-ai-stat-label{font-size:10px;color:var(--text-tertiary)}.bd-ai-stat-value{font-size:18px;font-weight:700;color:#a855f7;font-feature-settings:"tnum"}@media(max-width:768px){.bd-container{padding:var(--space-3)}.bd-summary-grid{grid-template-columns:1fr 1fr}.bd-bar-chart{height:160px}.bd-bar-col{min-width:36px}.bd-bar-value{font-size:8px}.bd-header{flex-direction:column}}@media(max-width:480px){.bd-summary-grid{grid-template-columns:1fr}.bd-summary-value{font-size:22px}}