:root{--primary-color: #4f46e5;--primary-hover: #4338ca;--secondary-color: #10b981;--bg-color: #f8fafc;--card-bg: rgba(255, 255, 255, .85);--text-main: #0f172a;--text-muted: #64748b;--border-color: #e2e8f0;--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 -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-glass: 0 8px 32px 0 rgba(31, 38, 135, .07);--radius-md: .5rem;--radius-lg: 1rem;--radius-xl: 1.5rem}*{box-sizing:border-box;margin:0;padding:0}body{font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background-color:var(--bg-color);background-image:radial-gradient(at 0% 0%,hsla(253,16%,7%,.05) 0,transparent 50%),radial-gradient(at 50% 0%,hsla(225,39%,30%,.05) 0,transparent 50%),radial-gradient(at 100% 0%,hsla(339,49%,30%,.05) 0,transparent 50%);color:var(--text-main);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;margin-bottom:.5rem;color:var(--text-main);letter-spacing:-.025em}a{color:var(--primary-color);text-decoration:none;transition:color .2s ease}a:hover{color:var(--primary-hover)}.app-container{max-width:800px;margin:0 auto;padding:1.5rem}.card{background:var(--card-bg);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.3);border-radius:var(--radius-lg);padding:1.5rem;box-shadow:var(--shadow-glass);margin-bottom:1.5rem;transition:transform .2s ease,box-shadow .2s ease}.card:hover{transform:translateY(-2px);box-shadow:0 12px 40px #1f26871f}.btn{display:inline-flex;align-items:center;justify-content:center;padding:.75rem 1.5rem;border-radius:var(--radius-md);font-weight:600;cursor:pointer;transition:all .2s ease;border:none;font-size:1rem;gap:.5rem}.btn-primary{background-color:var(--primary-color);color:#fff;box-shadow:0 4px 14px #4f46e563}.btn-primary:hover{background-color:var(--primary-hover);transform:translateY(-1px);box-shadow:0 6px 20px #4f46e53b}.btn-primary:disabled{background-color:var(--text-muted);cursor:not-allowed;transform:none;box-shadow:none}.btn-secondary{background-color:#fff;color:var(--text-main);border:1px solid var(--border-color)}.btn-secondary:hover{background-color:#f1f5f9}textarea,input{width:100%;padding:1rem;border:1px solid var(--border-color);border-radius:var(--radius-md);font-family:inherit;font-size:1rem;transition:border-color .2s ease,box-shadow .2s ease;background-color:#ffffffe6}textarea:focus,input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #4f46e533}.text-center{text-align:center}.text-muted{color:var(--text-muted)}.text-sm{font-size:.875rem}.text-lg{font-size:1.125rem}.text-xl{font-size:1.25rem}.font-bold{font-weight:700}.mb-2{margin-bottom:.5rem}.mb-4{margin-bottom:1rem}.mb-6{margin-bottom:1.5rem}.mt-4{margin-top:1rem}.mt-6{margin-top:1.5rem}.p-4{padding:1rem}.px-4{padding-left:1rem;padding-right:1rem}.py-2{padding-top:.5rem;padding-bottom:.5rem}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-between{justify-content:space-between}.justify-center{justify-content:center}.gap-2{gap:.5rem}.gap-4{gap:1rem}.grid{display:grid}.grid-cols-2{grid-template-columns:repeat(2,1fr)}.w-full{width:100%}.feedback-box{background:linear-gradient(135deg,#f0fdf4,#dcfce7);border-left:4px solid var(--secondary-color);padding:1.5rem;border-radius:0 var(--radius-md) var(--radius-md) 0;margin-top:2rem}.score-badge{display:inline-block;background-color:var(--secondary-color);color:#fff;padding:.25rem .75rem;border-radius:9999px;font-weight:700;font-size:1.25rem;margin-bottom:1rem}.app-header{display:flex;justify-content:space-between;align-items:center;padding:1.5rem 0;margin-bottom:2rem;border-bottom:1px solid var(--border-color)}.logo{font-size:1.5rem;font-weight:800;color:var(--primary-color);display:flex;align-items:center;gap:.5rem}.nav-links{display:flex;gap:1.5rem}.nav-item{color:var(--text-muted);font-weight:500;transition:color .2s;padding:.5rem;border-radius:var(--radius-md)}.nav-item:hover{color:var(--primary-color);background-color:#4f46e50d}.nav-item.active{color:var(--primary-color);background-color:#4f46e51a}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.animate-fade-in{animation:fadeIn .4s ease-out forwards}.audio-placeholder{background-color:#f1f5f9;padding:1.5rem;border-radius:var(--radius-md);display:flex;align-items:center;gap:1rem;margin-bottom:1rem;color:var(--primary-color);font-weight:600}@media (max-width: 640px){.grid-cols-2{grid-template-columns:1fr}.app-header{flex-direction:column;gap:1rem;align-items:flex-start}.nav-links{width:100%;justify-content:flex-start;overflow-x:auto;padding-bottom:.5rem}}