:root{--bg-color: #0b0c10;--text-primary: #e0e2e8;--text-secondary: #9094a3;--accent-primary: #6366f1;--accent-secondary: #a855f7;--accent-tertiary: #ec4899;--glass-bg: rgba(255, 255, 255, .03);--glass-border: rgba(255, 255, 255, .08);--font-sans: "Inter", system-ui, -apple-system, sans-serif;--font-display: "Outfit", system-ui, -apple-system, sans-serif;--radius-lg: 24px;--radius-full: 9999px;--transition-smooth: .4s cubic-bezier(.16, 1, .3, 1)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-color);color:var(--text-primary);min-height:100vh;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{width:100%;height:100%;position:relative;display:block}:root{--primary: #4361ee;--secondary: #3f37c9;--success: #10b981;--bg-color: #0f172a;--surface: rgba(255, 255, 255, .03);--surface-hover: rgba(255, 255, 255, .08);--border: rgba(255, 255, 255, .1);--text-main: #f8fafc;--text-muted: #cbd5e1;--radius-lg: 16px;--radius-md: 8px;--shadow: 0 4px 30px rgba(0, 0, 0, .3)}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Inter,system-ui,-apple-system,sans-serif;background-color:var(--bg-color);color:var(--text-main);min-height:100vh;overflow-x:hidden}.bg-orb{position:fixed;border-radius:50%;filter:blur(100px);z-index:-1;opacity:.5;animation:float 20s infinite ease-in-out alternate}.orb-primary{top:-10%;left:-10%;width:50vw;height:50vw;background:radial-gradient(circle,var(--primary) 0%,transparent 70%)}.orb-secondary{bottom:-20%;right:-10%;width:60vw;height:60vw;background:radial-gradient(circle,#7209b7 0%,transparent 70%);animation-delay:-10s}@keyframes float{0%{transform:translate(0) scale(1)}to{transform:translate(5%,5%) scale(1.1)}}.app-container{max-width:1200px;margin:0 auto;padding:2rem;min-height:100vh;display:flex;flex-direction:column;gap:2rem}.app-header{display:flex;justify-content:space-between;align-items:center;padding-bottom:1rem;border-bottom:1px solid var(--border)}.logo{font-size:1.5rem;font-weight:700;letter-spacing:-.5px}.logo span{color:var(--text-muted);font-weight:400}.nav-tabs{display:flex;align-items:center;width:100%;gap:.5rem;background:var(--surface);padding:.5rem;border-radius:var(--radius-md);border:1px solid var(--border)}.nav-tabs button{background:transparent;border:none;color:var(--text-muted);padding:.75rem 1.5rem;border-radius:calc(var(--radius-md) - 2px);cursor:pointer;font-weight:500;transition:all .2s;font-size:.9rem;white-space:nowrap}.nav-tabs button:hover{color:var(--text-main)}.nav-tabs button.active{background:#ffffff1a;color:var(--text-main);box-shadow:0 2px 10px #0003}.glass-card{background:var(--surface);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border);border-radius:var(--radius-lg);padding:2rem;box-shadow:var(--shadow)}.dashboard-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:2rem;padding:3rem!important}.stat-card h2{color:var(--text-muted);font-size:1rem;font-weight:500;margin-bottom:.5rem}.stat-number{font-size:3rem;font-weight:700;letter-spacing:-1px;background:linear-gradient(135deg,#fff,#cbd5e1);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.form-card{margin-bottom:2rem}.form-card h2{margin-bottom:1.5rem;font-size:1.25rem}.form-row{display:flex;gap:1rem;flex-wrap:wrap}input,select{flex:1;min-width:200px;background:#0003;border:1px solid var(--border);color:var(--text-main);padding:.8rem 1rem;border-radius:var(--radius-md);font-size:.95rem;outline:none;transition:border-color .2s}input:focus,select:focus{border-color:var(--primary)}input[type=date]::-webkit-calendar-picker-indicator{filter:invert(1);opacity:.5;cursor:pointer}option{background:var(--bg-color);color:var(--text-main)}.btn-primary{background:var(--primary);color:#fff;border:none;padding:.8rem 2rem;border-radius:var(--radius-md);font-weight:600;cursor:pointer;transition:background .2s,transform .1s;white-space:nowrap}.btn-primary:hover{background:var(--secondary)}.btn-primary:active{transform:scale(.98)}.table-card h2{margin-bottom:1.5rem}.data-table{width:100%;border-collapse:collapse;text-align:left}.data-table th,.data-table td{padding:1rem;border-bottom:1px solid var(--border)}.data-table th{color:var(--text-muted);font-weight:500;font-size:.85rem;text-transform:uppercase;letter-spacing:.5px}.data-table tr:last-child td{border-bottom:none}.data-table tbody tr{transition:background-color .2s}.data-table tbody tr:hover{background-color:var(--surface-hover)}.amount-cell{font-family:monospace;font-size:1.1rem;color:#fbbf24}.notes-cell{color:var(--text-muted);max-width:300px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.status-badge{display:inline-block;padding:.25rem .75rem;border-radius:99px;font-size:.75rem;font-weight:600;text-transform:uppercase;background:#10b98133;color:var(--success);border:1px solid rgba(16,185,129,.3)}.status-badge.inactive{background:#ef444433;color:#ef4444;border-color:#ef44444d}.empty-state{text-align:center;color:var(--text-muted);padding:3rem!important;font-style:italic}.fade-in{animation:fadeIn .4s ease-out forwards}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.expanded-row-container td{padding:0!important;border-bottom:2px solid var(--primary)!important}.clickable-row.expanded-active{background-color:var(--surface-hover);border-bottom:none!important}.expanded-content{padding:1.5rem;background:#00000026;border-top:1px solid var(--border);box-shadow:inset 0 5px 10px #0000001a}.expanded-profile-grid{display:grid;grid-template-columns:1fr 2fr;gap:2rem}.ep-info h4,.ep-history h4{margin-bottom:1rem;color:var(--text-muted);text-transform:uppercase;font-size:.85rem;letter-spacing:.5px}.ep-info p{margin-bottom:.5rem}.compact-table th,.compact-table td{padding:.5rem 1rem;font-size:.9rem}.profile-edit-form{width:100%}.print-only{display:none}@media print{@page{size:A4;margin:15mm}body{background:#fff!important;color:#000!important;margin:0;padding:0}.no-print{display:none!important}.print-only{display:block!important}.labels-grid{display:grid!important;grid-template-columns:repeat(2,1fr)!important;grid-auto-rows:calc((297mm - 30mm) / 10)!important;width:100%!important}.label-cell{padding:10mm;box-sizing:border-box;page-break-inside:avoid}.label-address{font-size:10pt;margin-bottom:4mm}.label-name{font-size:14pt;font-weight:700;margin-bottom:6mm}.label-sender{font-size:8pt;color:#555}.certificate-page{padding:20mm;page-break-after:always}.cert-title{text-align:center;font-size:24pt;margin-bottom:15mm}.cert-header{display:flex;justify-content:space-between;margin-bottom:15mm}.cert-member-info h2{font-size:16pt;margin-bottom:2mm}.cert-member-info p{font-size:12pt;margin:1mm 0}.cert-summary{text-align:right}.cert-summary p{font-size:14pt;margin-bottom:2mm}.cert-summary h3{font-size:22pt;margin:0;border-bottom:2px solid black;padding-bottom:2mm}.cert-body h4{font-size:14pt;margin-bottom:5mm}.cert-table{width:100%;border-collapse:collapse;margin-bottom:20mm}.cert-table th,.cert-table td{border:1px solid black;padding:3mm;text-align:left;font-size:11pt}.cert-table th{background-color:#f2f2f2!important;-webkit-print-color-adjust:exact}.cert-footer{font-size:12pt}.cert-signature{margin-top:15mm;text-align:right}.cert-signature p{margin:2mm 0}.cert-signature span{display:inline-block;width:15mm;height:15mm;border:1px solid #c00;color:#c00;border-radius:50%;text-align:center;line-height:15mm;font-size:10pt;margin-left:5mm}}.btn-secondary{background:#ffffff1a;color:var(--text-main);border:1px solid var(--border);padding:.8rem 2rem;border-radius:var(--radius-md);font-weight:600;cursor:pointer;transition:all .2s;white-space:nowrap}.btn-secondary:hover{background:#fff3}.logo-header{display:flex;align-items:center;width:100%;justify-content:space-between;flex-wrap:wrap;gap:1rem}.charts-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.5rem}@media(max-width:768px){.app-container{padding:.8rem;gap:1.2rem}.app-header{flex-direction:column;gap:1.2rem;align-items:center;text-align:center}.logo-header{flex-direction:column;align-items:center;text-align:center;gap:1rem}.logo-controls{justify-content:center;width:100%}.nav-tabs{width:100%;display:grid;grid-template-columns:1fr 1fr;gap:.5rem;padding:.35rem}.nav-tabs button{padding:.65rem .5rem;font-size:.85rem;text-align:center;display:flex;align-items:center;justify-content:center;width:100%}.glass-card{padding:1.2rem;border-radius:var(--radius-lg);backdrop-filter:none!important;-webkit-backdrop-filter:none!important;background:#121218f2!important}.study-card-front,.study-card-back{backdrop-filter:none!important;-webkit-backdrop-filter:none!important;background:#1e1e28fa!important}.dashboard-grid{padding:1rem!important;gap:1.2rem;grid-template-columns:1fr!important}.charts-row{grid-template-columns:1fr!important;gap:1.2rem}.stat-number{font-size:2.2rem}.form-row{flex-direction:column;gap:.8rem}input,select{min-width:0!important;width:100%!important}.btn-primary{width:100%;padding:.8rem 1.5rem}.data-table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch;white-space:nowrap}.data-table th,.data-table td{padding:.75rem .5rem}.expanded-profile-grid{grid-template-columns:1fr;gap:1.2rem}.study-card-container{height:340px;margin:1rem auto}.study-card-front,.study-card-back{padding:1.2rem}.grades-container{display:grid!important;grid-template-columns:repeat(3,1fr)!important;gap:.5rem!important;width:100%!important}.btn-grade{padding:.8rem .5rem!important;font-size:.8rem!important;min-height:44px;display:flex;align-items:center;justify-content:center}.header-backup-section{display:none!important}.modal-body-grid{grid-template-columns:1fr!important;gap:2rem;padding:1rem}.modal-ai-column{border-left:none!important;padding-left:0!important;border-top:1px solid rgba(255,255,255,.08);padding-top:1.5rem}.expanded-row{display:block!important;width:100%!important}.expanded-td{display:block!important;width:calc(100vw - 4rem)!important;max-width:100%!important;white-space:normal!important;box-sizing:border-box!important;padding:1.2rem!important}}.study-card-container{perspective:1000px;width:100%;max-width:500px;height:280px;margin:1.5rem auto}.study-card{width:100%;height:100%;cursor:pointer}.study-card-inner{position:relative;width:100%;height:100%;text-align:center;transition:transform .6s cubic-bezier(.4,0,.2,1);transform-style:preserve-3d}.study-card.flipped .study-card-inner{transform:rotateY(180deg)}.study-card-front,.study-card-back{position:absolute;width:100%;height:100%;-webkit-backface-visibility:hidden;backface-visibility:hidden;display:flex;flex-direction:column;justify-content:center;align-items:center;border-radius:var(--radius-lg);border:1px solid var(--border);padding:2rem;box-shadow:var(--shadow);overflow-y:auto}.study-card-front{background:#ffffff08;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}.study-card-back{background:#ffffff0d;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);transform:rotateY(180deg)}.difficulty-badge{position:absolute;top:1rem;left:1.2rem;padding:.2rem .6rem;font-size:.75rem;border-radius:4px;font-weight:700}.difficulty-badge.beginner{background:#10b98133;color:#10b981}.difficulty-badge.intermediate{background:#3b82f633;color:#3b82f6}.difficulty-badge.advanced{background:#ef444433;color:#ef4444}.category-badge{position:absolute;top:1rem;right:1.2rem;padding:.2rem .6rem;font-size:.75rem;border-radius:4px;background:#ffffff1a;color:var(--text-muted)}.grades-container{display:flex;justify-content:center;gap:.5rem;margin-top:1rem;width:100%}.btn-grade{border:1px solid var(--border);color:#fff;padding:.6rem .9rem;border-radius:var(--radius-md);font-weight:700;cursor:pointer;font-size:.85rem;transition:all .2s ease;flex:1}.btn-grade-0{background:#ef4444}.btn-grade-1{background:#f97316}.btn-grade-2{background:#eab308}.btn-grade-3{background:#3b82f6}.btn-grade-4{background:#8b5cf6}.btn-grade-5{background:#10b981}.btn-grade:hover{transform:translateY(-2px);filter:brightness(1.2);box-shadow:0 4px 15px #ffffff1a}.ai-section{display:flex;flex-direction:column;gap:1rem;margin-top:1.5rem;border-top:1px solid var(--border);padding-top:1.5rem}.ai-practice-box{background:#ffffff05;border:1px dashed var(--border);border-radius:var(--radius-md);padding:1.2rem}.ai-bubble{background:#6366f114;border:1px solid rgba(99,102,241,.2);border-radius:var(--radius-md);padding:1rem;margin-top:.5rem;font-size:.9rem}.spinner{border:3px solid rgba(255,255,255,.1);border-radius:50%;border-top:3px solid #6366f1;width:20px;height:20px;animation:spin 1s linear infinite;display:inline-block;vertical-align:middle;margin-right:.5rem}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@keyframes slideUp{0%{transform:translate(-50%,100px);opacity:0}to{transform:translate(-50%);opacity:1}}@keyframes pulse{0%{transform:scale(1);opacity:.8}50%{transform:scale(1.15);opacity:1}to{transform:scale(1);opacity:.8}}.modal-body-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:1.5rem;padding:1.5rem;overflow-y:auto;flex:1}.modal-ai-column{display:flex;flex-direction:column;gap:1rem;border-left:1px solid rgba(255,255,255,.08);padding-left:1.5rem}.expanded-td{white-space:normal}