:root{--primary-900: #07192f;--primary-800: #0b2545;--primary-700: #133966;--primary-600: #1a4f8b;--primary-500: #2563eb;--primary-100: #e0edff;--primary-50: #f0f6ff;--teal-800: #0f4c5c;--teal-700: #0d5c75;--teal-600: #0f766e;--teal-500: #14b8a6;--teal-100: #ccfbf1;--teal-50: #f0fdfa;--gold-800: #854d0e;--gold-700: #a16207;--gold-600: #c59b27;--gold-500: #eab308;--gold-100: #fef9c3;--gold-50: #fefce8;--indigo-700: #4338ca;--indigo-600: #4f46e5;--indigo-50: #eef2ff;--pink-700: #be185d;--pink-600: #db2777;--pink-50: #fdf2f8;--focus-ring: 0 0 0 2px var(--white), 0 0 0 4px var(--primary-600);--focus-ring-inset: inset 0 0 0 2px var(--primary-600);--slate-900: #0f172a;--slate-800: #1e293b;--slate-700: #334155;--slate-600: #475569;--slate-500: #64748b;--slate-400: #94a3b8;--slate-300: #cbd5e1;--slate-200: #e2e8f0;--slate-100: #f1f5f9;--slate-50: #f8fafc;--white: #ffffff;--success-bg: #ecfdf5;--success-border: #a7f3d0;--success-text: #065f46;--success-main: #10b981;--warning-bg: #fffbeb;--warning-border: #fde68a;--warning-text: #92400e;--warning-main: #f59e0b;--danger-bg: #fef2f2;--danger-border: #fecaca;--danger-text: #991b1b;--danger-main: #ef4444;--info-bg: #eff6ff;--info-border: #bfdbfe;--info-text: #1e40af;--info-main: #3b82f6;--font-sans: "Sarabun", "Plus Jakarta Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-heading: "Prompt", "Sarabun", "Plus Jakarta Sans", sans-serif;--font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;--space-1: .25rem;--space-2: .5rem;--space-3: .75rem;--space-4: 1rem;--space-5: 1.25rem;--space-6: 1.5rem;--space-8: 2rem;--space-10: 2.5rem;--space-12: 3rem;--radius-xs: 4px;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-full: 9999px;--shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, .05);--shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, .1), 0 1px 2px -1px rgba(15, 23, 42, .1);--shadow-md: 0 4px 6px -1px rgba(15, 23, 42, .08), 0 2px 4px -2px rgba(15, 23, 42, .08);--shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, .08), 0 4px 6px -4px rgba(15, 23, 42, .04);--shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, .1), 0 8px 10px -6px rgba(15, 23, 42, .04);--sidebar-width: 270px;--topbar-height: 68px;--z-dropdown: 100;--z-sticky: 200;--z-drawer-backdrop: 400;--z-drawer: 500;--z-modal-backdrop: 600;--z-modal: 700;--z-toast: 800;--z-tooltip: 900}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;scroll-behavior:smooth}body{font-family:var(--font-sans);background-color:var(--slate-100);color:var(--slate-800);line-height:1.5;min-height:100vh;overflow-x:hidden}h1,h2,h3,h4,h5,h6{font-family:var(--font-heading);color:var(--primary-900);font-weight:600;line-height:1.3}a{color:var(--primary-600);text-decoration:none;transition:color .15s 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auto}.page-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--space-6);flex-wrap:wrap;gap:var(--space-4)}.page-title-group h1{font-size:1.5rem;font-weight:700;color:var(--primary-900);letter-spacing:-.01em;display:flex;align-items:center;gap:var(--space-2)}.page-subtitle{font-size:.875rem;color:var(--slate-500);margin-top:var(--space-1)}.page-actions{display:flex;align-items:center;gap:var(--space-3);flex-wrap:wrap}.breadcrumb{display:flex;align-items:center;gap:var(--space-2);font-size:.8125rem;color:var(--slate-400);margin-bottom:var(--space-2)}.breadcrumb-item{color:var(--slate-500)}.breadcrumb-item.active{color:var(--primary-700);font-weight:600}.breadcrumb-separator{color:var(--slate-300)}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-6)}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-6)}.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--space-5)}.grid-1-2{display:grid;grid-template-columns:1fr 2fr;gap:var(--space-6)}.grid-2-1{display:grid;grid-template-columns:2fr 1fr;gap:var(--space-6)}@keyframes fadeIn{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:fadeIn .25s cubic-bezier(.16,1,.3,1) forwards}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.animate-pulse{animation:pulse 2s cubic-bezier(.4,0,.6,1) infinite}.mobile-only{display:none!important}.desktop-only{display:flex!important}@media(max-width:1024px){.main-wrapper{margin-left:0}.content-body{padding:var(--space-4)}.grid-4{grid-template-columns:repeat(2,1fr)}.grid-3,.grid-1-2,.grid-2-1{grid-template-columns:1fr}}@media(max-width:640px){.desktop-only{display:none!important}.mobile-only{display:flex!important}.grid-2,.grid-4{grid-template-columns:1fr}.page-header{flex-direction:column;gap:var(--space-3)}.page-actions{width:100%;flex-wrap:wrap}.page-actions 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infinite}.skeleton-cell-sm{width:60px}.skeleton-cell-md{width:140px}.skeleton-cell-lg{flex:1}@keyframes skeleton-shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.grade-table-input{width:60px;padding:4px 6px;border:1px solid var(--slate-300);border-radius:var(--radius-sm);font-size:.875rem;text-align:center;font-family:inherit;color:var(--slate-800);background:var(--white);transition:border-color .15s}.grade-table-input:focus{outline:none;border-color:var(--primary-600);box-shadow:0 0 0 2px #0b25451a}.grade-pill{display:inline-block;padding:2px 10px;border-radius:99px;font-size:.8125rem;font-weight:700;text-align:center}.grade-pill-a{background:#dcfce7;color:#166534}.grade-pill-b{background:#dbeafe;color:#1e40af}.grade-pill-c{background:#fef9c3;color:#854d0e}.grade-pill-d{background:#ffedd5;color:#9a3412}.grade-pill-f{background:#fecaca;color:#991b1b}