:root{--teal-primary: #14b8a6;--teal-dark: #0d9488;--teal-light: #5eead4;--teal-lighter: #ccfbf1;--teal-lightest: #f0fdfa;--green-success: #10b981;--red-error: #ef4444;--yellow-warning: #f59e0b;--blue-info: #3b82f6;--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;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--radius-sm: .5rem;--radius-md: .75rem;--radius-lg: 1rem;--radius-xl: 1.5rem;--radius-full: 9999px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--shadow-xl: 0 20px 25px -5px rgb(0 0 0 / .1), 0 8px 10px -6px rgb(0 0 0 / .1);--transition-fast: .15s ease-in-out;--transition-base: .2s ease-in-out;--transition-slow: .3s ease-in-out}*{box-sizing:border-box;margin:0;padding:0}body{margin:0;min-height:100vh;background:linear-gradient(135deg,var(--teal-lightest) 0%,#ffffff 100%);color:var(--gray-800);line-height:1.6}#root{width:100%;min-height:100vh}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;color:var(--gray-900);margin-bottom:var(--spacing-md)}h1{font-size:2.5rem;background:linear-gradient(135deg,var(--teal-primary) 0%,var(--teal-dark) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}h2{font-size:2rem;color:var(--teal-dark)}h3{font-size:1.5rem;color:var(--gray-800)}button{font-family:inherit;font-size:1rem;font-weight:600;padding:.875rem 1.75rem;border:none;border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition-base);box-shadow:var(--shadow-md);position:relative;overflow:hidden}button:before{content:"";position:absolute;top:50%;left:50%;width:0;height:0;border-radius:50%;background:#ffffff4d;transform:translate(-50%,-50%);transition:width .6s,height .6s}button:hover:before{width:300px;height:300px}button:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg)}button:active{transform:translateY(0);box-shadow:var(--shadow-sm)}button:disabled{opacity:.5;cursor:not-allowed;transform:none}button:disabled:hover{transform:none;box-shadow:var(--shadow-md)}.btn-primary{background:linear-gradient(135deg,var(--teal-primary) 0%,var(--teal-dark) 100%);color:#fff}.btn-primary:hover{background:linear-gradient(135deg,var(--teal-dark) 0%,var(--teal-primary) 100%)}.btn-success{background:linear-gradient(135deg,var(--green-success) 0%,#059669 100%);color:#fff}.btn-danger{background:linear-gradient(135deg,var(--red-error) 0%,#dc2626 100%);color:#fff}.btn-secondary{background:#fff;color:var(--teal-primary);border:2px solid var(--teal-primary)}.btn-secondary:hover{background:var(--teal-lighter)}input[type=text],input[type=password],input[type=number],input[type=email],select,textarea{width:100%;padding:.875rem 1rem;font-size:1rem;border:2px solid var(--gray-300);border-radius:var(--radius-md);background:#fff;color:var(--gray-800);transition:all var(--transition-base);font-family:inherit}input:focus,select:focus,textarea:focus{outline:none;border-color:var(--teal-primary);box-shadow:0 0 0 3px var(--teal-lighter)}input:disabled,select:disabled,textarea:disabled{background:var(--gray-100);cursor:not-allowed;opacity:.6}.card{background:#fff;border-radius:var(--radius-xl);padding:var(--spacing-xl);box-shadow:var(--shadow-lg);transition:all var(--transition-base)}.card:hover{box-shadow:var(--shadow-xl);transform:translateY(-2px)}.container{max-width:1200px;margin:0 auto;padding:var(--spacing-xl)}@keyframes spin{to{transform:rotate(360deg)}}.spinner{display:inline-block;width:2rem;height:2rem;border:3px solid var(--teal-lighter);border-top-color:var(--teal-primary);border-radius:50%;animation:spin .8s linear infinite}.badge{display:inline-block;padding:.25rem .75rem;font-size:.875rem;font-weight:600;border-radius:var(--radius-full);background:var(--teal-lighter);color:var(--teal-dark)}.progress-bar{width:100%;height:.5rem;background:var(--gray-200);border-radius:var(--radius-full);overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,var(--teal-primary) 0%,var(--teal-light) 100%);border-radius:var(--radius-full);transition:width var(--transition-base)}@media (max-width: 768px){h1{font-size:2rem}h2{font-size:1.5rem}.container{padding:var(--spacing-md)}button{padding:.75rem 1.5rem;font-size:.9375rem}}html{scroll-behavior:smooth}::selection{background:var(--teal-lighter);color:var(--teal-dark)}.exam-countdown{font-variant-numeric:tabular-nums;font-weight:600;padding:.35rem .75rem;border-radius:var(--radius-md);transition:color var(--transition-base),background-color var(--transition-base),box-shadow var(--transition-base)}.exam-countdown.normal{color:var(--teal-dark);background:var(--teal-lightest);border:1px solid var(--teal-lighter)}.exam-countdown.warning-10{color:var(--yellow-warning);background:#fffbeb;border:1px solid #fde68a}.exam-countdown.warning-5{color:#d97706;background:#fffbeb;border:1px solid #fcd34d}.exam-countdown.warning-2{color:var(--red-error);background:#fef2f2;border:1px solid #fecaca;animation:exam-countdown-pulse 2s ease-in-out infinite}.exam-countdown.warning-1{color:var(--red-error);background:#fef2f2;border:1px solid var(--red-error);animation:exam-countdown-pulse 1s ease-in-out infinite}@keyframes exam-countdown-pulse{0%,to{opacity:1;box-shadow:0 0 #ef444433}50%{opacity:.95;box-shadow:0 0 0 6px #ef444414}}