:root{--color-primary: #2563eb;--color-primary-dark: #1d4ed8;--color-primary-light: #3b82f6;--color-secondary: #8b5cf6;--color-secondary-dark: #7c3aed;--color-accent: #10b981;--color-accent-dark: #059669;--color-warning: #f59e0b;--color-error: #ef4444;--color-bg: #fafafa;--color-surface: #ffffff;--color-surface-hover: #f8fafc;--color-text-primary: #0f172a;--color-text-secondary: #64748b;--color-text-muted: #94a3b8;--color-text-inverse: #ffffff;--color-border: #e2e8f0;--color-border-light: #f1f5f9;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -4px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 8px 10px -6px rgba(0, 0, 0, .1);--font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-base: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 1.875rem;--font-size-4xl: 2.25rem;--font-size-5xl: 3rem;--spacing-1: .25rem;--spacing-2: .5rem;--spacing-3: .75rem;--spacing-4: 1rem;--spacing-5: 1.25rem;--spacing-6: 1.5rem;--spacing-8: 2rem;--spacing-10: 2.5rem;--spacing-12: 3rem;--spacing-16: 4rem;--spacing-20: 5rem;--radius-sm: .25rem;--radius-md: .375rem;--radius-lg: .5rem;--radius-xl: .75rem;--radius-2xl: 1rem;--radius-full: 9999px;--transition-fast: .15s ease;--transition-base: .2s ease;--transition-slow: .3s ease;--container-max: 1200px;--container-padding: 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auto;padding:0 var(--container-padding)}.flex{display:flex}.flex-col{flex-direction:column}.flex-wrap{flex-wrap:wrap}.items-center{align-items:center}.items-start{align-items:flex-start}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.justify-end{justify-content:flex-end}.gap-1{gap:var(--spacing-1)}.gap-2{gap:var(--spacing-2)}.gap-3{gap:var(--spacing-3)}.gap-4{gap:var(--spacing-4)}.gap-6{gap:var(--spacing-6)}.gap-8{gap:var(--spacing-8)}.grid{display:grid}.grid-cols-2{grid-template-columns:repeat(2,1fr)}.grid-cols-3{grid-template-columns:repeat(3,1fr)}.grid-cols-4{grid-template-columns:repeat(4,1fr)}.m-0{margin:0}.m-auto{margin:auto}.mt-2{margin-top:var(--spacing-2)}.mt-4{margin-top:var(--spacing-4)}.mt-6{margin-top:var(--spacing-6)}.mt-8{margin-top:var(--spacing-8)}.mb-2{margin-bottom:var(--spacing-2)}.mb-4{margin-bottom:var(--spacing-4)}.mb-6{margin-bottom:var(--spacing-6)}.mb-8{margin-bottom:var(--spacing-8)}.p-2{padding:var(--spacing-2)}.p-4{padding:var(--spacing-4)}.p-6{padding:var(--spacing-6)}.p-8{padding:var(--spacing-8)}.px-4{padding-left:var(--spacing-4);padding-right:var(--spacing-4)}.px-6{padding-left:var(--spacing-6);padding-right:var(--spacing-6)}.py-2{padding-top:var(--spacing-2);padding-bottom:var(--spacing-2)}.py-4{padding-top:var(--spacing-4);padding-bottom:var(--spacing-4)}.py-8{padding-top:var(--spacing-8);padding-bottom:var(--spacing-8)}.py-12{padding-top:var(--spacing-12);padding-bottom:var(--spacing-12)}.py-16{padding-top:var(--spacing-16);padding-bottom:var(--spacing-16)}.py-20{padding-top:var(--spacing-20);padding-bottom:var(--spacing-20)}.card{background:var(--color-surface);border-radius:var(--radius-xl);box-shadow:var(--shadow-md);padding:var(--spacing-6);transition:box-shadow var(--transition-base),transform var(--transition-base)}.card:hover{box-shadow:var(--shadow-lg)}.card-clickable:hover{transform:translateY(-2px);cursor:pointer}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-2);padding:var(--spacing-3) var(--spacing-6);font-size:var(--font-size-base);font-weight:600;border-radius:var(--radius-lg);border:none;cursor:pointer;transition:all var(--transition-fast);text-decoration:none;white-space:nowrap}.btn:disabled{opacity:.6;cursor:not-allowed}.btn-primary{background:var(--color-primary);color:var(--color-text-inverse)}.btn-primary:hover:not(:disabled){background:var(--color-primary-dark);transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-secondary{background:var(--color-secondary);color:var(--color-text-inverse)}.btn-secondary:hover:not(:disabled){background:var(--color-secondary-dark);transform:translateY(-1px)}.btn-outline{background:transparent;color:var(--color-primary);border:2px solid var(--color-primary)}.btn-outline:hover:not(:disabled){background:var(--color-primary);color:var(--color-text-inverse)}.btn-ghost{background:transparent;color:var(--color-text-secondary)}.btn-ghost:hover:not(:disabled){background:var(--color-surface-hover);color:var(--color-text-primary)}.btn-accent{background:var(--color-accent);color:var(--color-text-inverse)}.btn-accent:hover:not(:disabled){background:var(--color-accent-dark)}.btn-lg{padding:var(--spacing-4) var(--spacing-8);font-size:var(--font-size-lg)}.btn-sm{padding:var(--spacing-2) var(--spacing-4);font-size:var(--font-size-sm)}.btn-icon{padding:var(--spacing-3);border-radius:var(--radius-lg)}.btn-oauth{width:100%;background:var(--color-surface);color:var(--color-text-primary);border:1px solid var(--color-border);font-weight:500}.btn-oauth:hover{background:var(--color-surface-hover);border-color:var(--color-text-muted)}.btn-oauth svg,.btn-oauth img{width:20px;height:20px}.form-group{margin-bottom:var(--spacing-4)}.form-label{display:block;margin-bottom:var(--spacing-2);font-size:var(--font-size-sm);font-weight:500;color:var(--color-text-primary)}.form-input{width:100%;padding:var(--spacing-3) var(--spacing-4);font-size:var(--font-size-base);font-family:var(--font-family);border:1px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-surface);color:var(--color-text-primary);transition:border-color var(--transition-fast),box-shadow var(--transition-fast)}.form-input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #2563eb1a}.form-input::placeholder{color:var(--color-text-muted)}.form-select{-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748B' stroke-width='2'%3E%3Cpolyline points='6,9 12,15 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svg{width:20px;height:20px}.main-content{margin-left:260px;padding:var(--spacing-8);min-height:100vh}.page-header{margin-bottom:var(--spacing-8)}.page-title{font-size:var(--font-size-3xl);margin-bottom:var(--spacing-2)}.page-subtitle{color:var(--color-text-secondary)}.stat-card{background:var(--color-surface);border-radius:var(--radius-xl);padding:var(--spacing-6);box-shadow:var(--shadow-sm)}.stat-card-icon{width:48px;height:48px;border-radius:var(--radius-lg);display:flex;align-items:center;justify-content:center;margin-bottom:var(--spacing-4)}.stat-card-icon.primary{background:#2563eb1a;color:var(--color-primary)}.stat-card-icon.accent{background:#10b9811a;color:var(--color-accent)}.stat-card-icon.secondary{background:#8b5cf61a;color:var(--color-secondary)}.stat-card-icon.warning{background:#f59e0b1a;color:var(--color-warning)}.stat-card-value{font-size:var(--font-size-3xl);font-weight:700;margin-bottom:var(--spacing-1)}.stat-card-label{color:var(--color-text-secondary);font-size:var(--font-size-sm)}.student-card{display:flex;align-items:center;gap:var(--spacing-4);padding:var(--spacing-4);background:var(--color-surface);border-radius:var(--radius-xl);box-shadow:var(--shadow-sm);transition:all var(--transition-base);cursor:pointer}.student-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.student-avatar{width:56px;height:56px;border-radius:var(--radius-full);background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:var(--font-size-xl)}.student-info{flex:1}.student-name{font-weight:600;margin-bottom:var(--spacing-1)}.student-year{color:var(--color-text-secondary);font-size:var(--font-size-sm)}.student-stats{display:flex;gap:var(--spacing-4);text-align:center}.student-stat-value{font-weight:700;color:var(--color-primary)}.student-stat-label{font-size:var(--font-size-xs);color:var(--color-text-muted)}.term-selector{display:flex;background:var(--color-surface);border-radius:var(--radius-full);padding:var(--spacing-1);box-shadow:var(--shadow-sm)}.term-btn{padding:var(--spacing-3) 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var(--transition-fast)}.duration-btn:hover{border-color:var(--color-primary);color:var(--color-primary)}.duration-value{min-width:120px;text-align:center;font-size:var(--font-size-2xl);font-weight:700;color:var(--color-text-primary)}.mode-toggle{display:flex;background:var(--color-surface);border-radius:var(--radius-xl);padding:var(--spacing-1);box-shadow:var(--shadow-sm)}.mode-option{flex:1;padding:var(--spacing-4) var(--spacing-6);border-radius:var(--radius-lg);border:none;background:transparent;font-weight:600;cursor:pointer;transition:all var(--transition-fast);text-align:center}.mode-option.active{background:var(--color-primary);color:#fff}.mode-option:not(.active){color:var(--color-text-secondary)}.mode-option:not(.active):hover{background:var(--color-surface-hover)}.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:var(--spacing-3)}.topic-item{display:flex;align-items:center;gap:var(--spacing-3);padding:var(--spacing-4);background:var(--color-surface);border:2px solid var(--color-border);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition-fast)}.topic-item:hover{border-color:var(--color-primary-light)}.topic-item.selected{border-color:var(--color-primary);background:#2563eb0d}.topic-item input{display:none}.topic-check{width:24px;height:24px;border-radius:var(--radius-md);border:2px solid var(--color-border);display:flex;align-items:center;justify-content:center;transition:all var(--transition-fast)}.topic-item.selected 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var(--spacing-4);color:var(--color-text-muted)}.score-badge{display:inline-flex;align-items:center;justify-content:center;width:80px;height:80px;border-radius:var(--radius-full);font-size:var(--font-size-3xl);font-weight:700}.score-badge.excellent{background:#10b9811a;color:var(--color-accent)}.score-badge.good{background:#2563eb1a;color:var(--color-primary)}.score-badge.needs-work{background:#f59e0b1a;color:var(--color-warning)}.strength-indicator{display:flex;align-items:center;gap:var(--spacing-2);padding:var(--spacing-2) var(--spacing-3);border-radius:var(--radius-md);font-size:var(--font-size-sm);font-weight:500}.strength-indicator.strong{background:#10b9811a;color:var(--color-accent)}.strength-indicator.weak{background:#f59e0b1a;color:var(--color-warning)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;display:flex;align-items:center;justify-content:center;z-index:1000;opacity:0;visibility:hidden;transition:all 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var(--spacing-3);font-size:var(--font-size-xs);font-weight:600;border-radius:var(--radius-full)}.badge-primary{background:#2563eb1a;color:var(--color-primary)}.badge-accent{background:#10b9811a;color:var(--color-accent)}.badge-warning{background:#f59e0b1a;color:var(--color-warning)}@media(max-width:1023px){.sidebar{transform:translate(-100%);transition:transform var(--transition-base);z-index:200}.sidebar.open{transform:translate(0)}.main-content{margin-left:0}.mobile-menu-btn{display:block}.navbar-nav{display:none}.grid-cols-4{grid-template-columns:repeat(2,1fr)}}@media(max-width:767px){:root{--container-padding: var(--spacing-4)}h1{font-size:var(--font-size-3xl)}h2{font-size:var(--font-size-2xl)}.grid-cols-2,.grid-cols-3,.grid-cols-4{grid-template-columns:1fr}.navbar-actions .btn span{display:none}.student-card{flex-direction:column;text-align:center}.student-stats{justify-content:center}.term-selector{width:100%}.term-btn{flex:1;padding:var(--spacing-3) var(--spacing-3);font-size:var(--font-size-sm)}.duration-picker{justify-content:center}.topic-grid{grid-template-columns:1fr}}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.animate-fade-in{animation:fadeIn var(--transition-slow) ease}.animate-slide-up{animation:slideUp var(--transition-slow) ease}@media print{.sidebar,.navbar,.btn{display:none!important}.main-content{margin:0;padding:0}}.modal{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;z-index:1000;align-items:center;justify-content:center;padding:var(--spacing-4)}.modal.active{display:flex}.modal-overlay{display:none;position:fixed;top:0;right:0;bottom:0;left:0;background:#00000080;z-index:1000;align-items:center;justify-content:center;padding:var(--spacing-4)}.modal-overlay.active{display:flex}.modal-overlay 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