:root{--primary-color:#6366f1;--primary-hover:#4f46e5;--secondary-color:#64748b;--success-color:#10b981;--error-color:#ef4444;--bg-color:#f8fafc;--card-bg:#ffffff;--text-primary:#1e293b;--text-secondary:#64748b;--border-color:#e2e8f0;--shadow:0 1px 3px 0 rgba(0, 0, 0, 0.1),0 1px 2px 0 rgba(0, 0, 0, 0.06);--shadow-lg:0 10px 15px -3px rgba(0, 0, 0, 0.1),0 4px 6px -2px rgba(0, 0, 0, 0.05)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;background-color:var(--bg-color);color:var(--text-primary);line-height:1.6;min-height:100vh;display:flex;flex-direction:column;position:relative}.container{max-width:1200px;margin:0 auto;padding:0 20px;width:100%}header{background:linear-gradient(135deg,var(--primary-color) 0,var(--primary-hover) 100%);color:#fff;padding:2rem 0;box-shadow:var(--shadow-lg)}.header-content{text-align:center;position:relative}header h1{font-size:2.5rem;margin-bottom:.5rem;font-weight:700}.subtitle{font-size:1.1rem;opacity:.9}.language-selector{position:absolute;top:0;right:0}.language-selector select{background:rgba(255,255,255,.2);color:#fff;border:1px solid rgba(255,255,255,.3);border-radius:6px;padding:.5rem 1rem;font-size:.9rem;cursor:pointer;transition:all .3s ease}.language-selector select:hover{background:rgba(255,255,255,.3);border-color:rgba(255,255,255,.5)}.language-selector select:focus{outline:0;background:rgba(255,255,255,.3);border-color:rgba(255,255,255,.6)}.language-selector select option{background:var(--primary-color);color:#fff}@media (max-width:768px){.language-selector{position:static;margin-top:1rem}}.ad-zone{background:rgba(255,255,255,.1);min-height:90px;display:flex;align-items:center;justify-content:center;margin:1rem 0;border-radius:8px}.ad-header{margin-top:1rem}.ad-footer{margin-bottom:1rem}.ad-sidebar{display:none}@media (min-width:1200px){main{padding-right:320px}.ad-sidebar{display:block;position:fixed;right:10px;top:50%;transform:translateY(-50%);width:300px;min-height:250px;max-height:80vh;overflow-y:auto;background:var(--card-bg);border:1px solid var(--border-color);border-radius:8px;padding:1rem;z-index:100;box-shadow:-2px 0 8px rgba(0,0,0,.1)}main .container{max-width:100%}}main{flex:1;padding:2rem 0;position:relative;z-index:1}.upload-section{margin-bottom:2rem}.upload-area{background:var(--card-bg);border:2px dashed var(--border-color);border-radius:12px;padding:3rem 2rem;text-align:center;transition:all .3s ease;cursor:pointer}.upload-area:hover{border-color:var(--primary-color);background:#f8f9ff}.upload-area.dragover{border-color:var(--primary-color);background:#f0f4ff;transform:scale(1.02)}.upload-content{display:flex;flex-direction:column;align-items:center;gap:1rem}.upload-icon{color:var(--primary-color);margin-bottom:1rem}.upload-area h2{font-size:1.5rem;color:var(--text-primary);margin-bottom:.5rem}.upload-area p{color:var(--text-secondary);margin:.5rem 0}.file-info{font-size:.875rem;color:var(--text-secondary);margin-top:1rem}.file-selected{display:flex;flex-direction:column;align-items:center;gap:1rem}.file-icon{color:var(--success-color)}.file-name{font-weight:600;color:var(--text-primary);word-break:break-all}.fps-section{background:var(--card-bg);border-radius:12px;padding:2rem;margin-bottom:2rem;box-shadow:var(--shadow)}.fps-section h3{margin-bottom:1.5rem;text-align:center;font-size:1.5rem}.fps-options{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:1rem;margin-bottom:2rem}.fps-option{position:relative;cursor:pointer}.fps-option input[type=radio]{position:absolute;opacity:0;cursor:pointer}.fps-label{display:block;padding:1rem;background:var(--bg-color);border:2px solid var(--border-color);border-radius:8px;text-align:center;font-weight:600;transition:all .3s ease}.fps-option input[type=radio]:checked+.fps-label{background:var(--primary-color);color:#fff;border-color:var(--primary-color);transform:scale(1.05)}.fps-option:hover .fps-label{border-color:var(--primary-color)}.size-option{margin-bottom:2rem;text-align:center}.size-option label{display:block;margin-bottom:.5rem;font-weight:600;color:var(--text-primary)}.size-option input{padding:.75rem;border:2px solid var(--border-color);border-radius:8px;font-size:1rem;width:200px;text-align:center;transition:border-color .3s ease}.size-option input:focus{outline:0;border-color:var(--primary-color);box-shadow:0 0 0 3px rgba(99,102,241,.1)}.size-option input.has-error{border-color:var(--error-color)!important}.size-option input.has-error:focus{border-color:var(--error-color)!important;box-shadow:0 0 0 3px rgba(239,68,68,.1)}.size-error{color:var(--error-color);font-size:.9rem;margin-top:.5rem;text-align:center;animation:fadeIn .3s ease}@keyframes fadeIn{from{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}.btn{padding:.75rem 1.5rem;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .3s ease;text-decoration:none;display:inline-block}.btn-primary{background:var(--primary-color);color:#fff}.btn-primary:hover{background:var(--primary-hover);transform:translateY(-2px);box-shadow:var(--shadow-lg)}.btn-secondary{background:var(--secondary-color);color:#fff}.btn-secondary:hover{background:#475569;transform:translateY(-2px)}.btn-large{padding:1rem 2rem;font-size:1.1rem}.btn:disabled{opacity:.6;cursor:not-allowed;transform:none}.loading-section{background:var(--card-bg);border-radius:12px;padding:3rem;text-align:center;margin-bottom:2rem;box-shadow:var(--shadow)}.loading-spinner{width:50px;height:50px;border:4px solid var(--border-color);border-top-color:var(--primary-color);border-radius:50%;animation:spin 1s linear infinite;margin:0 auto 1.5rem}@keyframes spin{to{transform:rotate(360deg)}}.loading-details{color:var(--text-secondary);font-size:.875rem;margin-top:.5rem}.result-section{background:var(--card-bg);border-radius:12px;padding:2rem;margin-bottom:2rem;box-shadow:var(--shadow)}.result-content{text-align:center}.result-content h3{color:var(--success-color);margin-bottom:1.5rem;font-size:1.5rem}.result-info{background:var(--bg-color);border-radius:8px;padding:1.5rem;margin-bottom:2rem;text-align:left}.result-info p{margin:.5rem 0;color:var(--text-secondary)}.result-info strong{color:var(--text-primary)}.result-actions{display:flex;gap:1rem;justify-content:center;flex-wrap:wrap}.error-section{background:var(--card-bg);border-radius:12px;padding:2rem;margin-bottom:2rem;box-shadow:var(--shadow);border:2px solid var(--error-color)}.error-content{text-align:center}.error-icon{color:var(--error-color);margin-bottom:1rem}.error-content h3{color:var(--error-color);margin-bottom:1rem}.error-message{color:var(--text-secondary);margin-bottom:1.5rem;padding:1rem;background:#fef2f2;border-radius:8px}footer{background:var(--card-bg);border-top:1px solid var(--border-color);padding:2rem 0;margin-top:auto;text-align:center}.footer-links{margin-top:1rem}.footer-links a{color:var(--primary-color);text-decoration:none;margin:0 .5rem}.footer-links a:hover{text-decoration:underline}@media (max-width:768px){header h1{font-size:2rem}.upload-area{padding:2rem 1rem}.fps-options{grid-template-columns:repeat(2,1fr)}.result-actions{flex-direction:column}.result-actions .btn{width:100%}.ad-sidebar{display:none}main{padding-right:0}}@media (max-width:480px){header h1{font-size:1.5rem}.subtitle{font-size:.9rem}.fps-options{grid-template-columns:1fr}}