:root{--primary:#c1009d;--primary-dark:#a0007f;--primary-light:#d633b3;--success:#10b981;--warning:#f59e0b;--error:#ef4444;--white:#fff;--gray-50:#f9fafb;--gray-100:#f3f4f6;--gray-200:#e5e7eb;--gray-300:#d1d5db;--gray-400:#9ca3af;--gray-500:#6b7280;--gray-600:#4b5563;--gray-700:#374151;--gray-800:#1f2937;--gray-900:#111827;--spacing-xs:0.25rem;--spacing-sm:0.5rem;--spacing-md:1rem;--spacing-lg:1.5rem;--spacing-xl:2rem;--radius-md:0.5rem;--radius-lg:0.75rem;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a,0 2px 4px -2px #0000001a}*{box-sizing:border-box;margin:0;padding:0}body{-webkit-font-smoothing:antialiased;background-color:#f9fafb;background-color:var(--gray-50);color:#111827;color:var(--gray-900);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;line-height:1.5}.app-container{display:flex;min-height:100vh}.sidebar{background:#fff;background:var(--white);border-right:1px solid #e5e7eb;border-right:1px solid var(--gray-200);display:flex;flex-direction:column;padding:1.5rem;padding:var(--spacing-lg);width:260px}.sidebar-logo{align-items:center;color:#c1009d;color:var(--primary);display:flex;font-size:1.5rem;font-weight:700;gap:.5rem;gap:var(--spacing-sm);margin-bottom:2rem;margin-bottom:var(--spacing-xl)}.sidebar-nav{display:flex;flex-direction:column;gap:.25rem;gap:var(--spacing-xs)}.sidebar-link{align-items:center;border-radius:.5rem;border-radius:var(--radius-md);color:#4b5563;color:var(--gray-600);display:flex;font-weight:500;gap:.5rem;gap:var(--spacing-sm);padding:.5rem 1rem;padding:var(--spacing-sm) var(--spacing-md);text-decoration:none;transition:all .15s}.sidebar-link:hover{background:#f3f4f6;background:var(--gray-100);color:#111827;color:var(--gray-900)}.sidebar-link.active{background:#c1009d;background:var(--primary);color:#fff;color:var(--white)}.main-content{flex:1 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.15s}.btn-primary{background:#c1009d;background:var(--primary);color:#fff;color:var(--white)}.btn-primary:hover{background:#a0007f;background:var(--primary-dark)}.btn-secondary{background:#fff;background:var(--white);border:1px solid #d1d5db;border:1px solid var(--gray-300);color:#374151;color:var(--gray-700)}.btn-secondary:hover{background:#f9fafb;background:var(--gray-50)}.btn-success{background:#10b981;background:var(--success);border:1px solid #10b981;border:1px solid var(--success);color:#fff;color:var(--white)}.btn-success:hover{background:#059669;border-color:#059669}.btn-danger{background:#ef4444;background:var(--error);border:1px solid #ef4444;border:1px solid var(--error);color:#fff;color:var(--white)}.btn-danger:hover{background:#dc2626;border-color:#dc2626}.btn-sm{font-size:.75rem;padding:.25rem .5rem;padding:var(--spacing-xs) var(--spacing-sm)}.loading-spinner{animation:spin .8s linear infinite;border:2px solid #e5e7eb;border-top-color:#c1009d;border:2px solid var(--gray-200);border-radius:50%;border-top-color:var(--primary);display:inline-block;height:20px;width:20px}@keyframes spin{to{transform:rotate(1turn)}}.flex{display:flex}.gap-sm{gap:.5rem;gap:var(--spacing-sm)}.gap-md{gap:1rem;gap:var(--spacing-md)}.mb-md{margin-bottom:1rem;margin-bottom:var(--spacing-md)}.mb-lg{margin-bottom:1.5rem;margin-bottom:var(--spacing-lg)}.text-sm{font-size:.875rem}.text-muted{color:#6b7280;color:var(--gray-500)}.font-semibold{font-weight:600}.items-center{align-items:center}.justify-between{justify-content:space-between}.coach-avatar{align-items:center;background:#d633b3;background:var(--primary-light);border-radius:9999px;color:#fff;color:var(--white);display:flex;font-size:1.5rem;font-weight:600;height:64px;justify-content:center;width:64px}.coach-student-pill{background:#f3f4f6;background:var(--gray-100);border:1px solid #e5e7eb;border:1px solid var(--gray-200);color:#374151;color:var(--gray-700);font-weight:600;padding:.2rem 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