:root{font-family:system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}:root{--bg-primary: #23272f;--bg-secondary: #2a2f3a;--bg-tertiary: #1a1f2a;--text-primary: #ffffff;--text-secondary: #b0b3b8;--text-muted: #888888;--border-color: #666666;--error-color: #ff4444;--success-color: #4CAF50;--input-bg: #ffffff;--input-text: #000000}@media (prefers-color-scheme: light){:root{--bg-primary: #ffffff;--bg-secondary: #f5f5f5;--bg-tertiary: #e9ecef;--text-primary: #212529;--text-secondary: #6c757d;--text-muted: #6c757d;--border-color: #dee2e6;--error-color: #dc3545;--success-color: #198754;--input-bg: #ffffff;--input-text: #212529}}.main-container{min-height:100vh;display:flex;flex-direction:column;background:var(--bg-primary);padding:2rem;max-width:1400px;margin:0 auto;width:100%;color:var(--text-primary);transition:background-color .3s ease,color .3s ease}header{margin-bottom:2rem;text-align:center}@media (min-width: 1200px){.main-container{padding:3rem 4rem}header{margin-bottom:3rem}}@media (min-width: 768px) and (max-width: 1199px){.main-container{padding:2rem 3rem}}@media (max-width: 767px){.main-container{justify-content:center;align-items:center;padding:1rem}}h1{font-size:3rem;color:var(--text-primary);margin-bottom:.5rem;letter-spacing:2px}h2{color:var(--text-primary)}p{color:var(--text-secondary)}.subtitle{color:var(--text-secondary);font-size:1.25rem;margin-bottom:2.5rem}.main-action{padding:1rem 2.5rem;font-size:1.25rem;border:none;border-radius:2rem;background:linear-gradient(90deg,#4f8cff,#38e8ff);color:#fff;font-weight:700;cursor:pointer;box-shadow:0 4px 24px #0000001f;transition:transform .15s,box-shadow .15s,background .3s}.main-action:hover,.main-action:focus{transform:translateY(-2px) scale(1.04);box-shadow:0 8px 32px #0000002e;background:linear-gradient(90deg,#38e8ff,#4f8cff)}footer{margin-top:3rem;text-align:center}@media (max-width: 600px){h1{font-size:2rem}.main-action{font-size:1rem;padding:.75rem 1.5rem}.subtitle{font-size:1rem}}.nav-link{display:inline-block;margin:0 1.2rem 0 0;padding:.5rem 1.2rem;color:var(--text-secondary);background:none;border-radius:1.5rem;text-decoration:none;font-size:1.1rem;font-weight:500;transition:background .2s,color .2s}.nav-link:hover,.nav-link:focus{background:var(--bg-secondary);color:var(--text-primary)}.nav-link-active{background:linear-gradient(90deg,#4f8cff,#38e8ff);color:#fff!important}select,input{background:var(--input-bg);color:var(--input-text);border:1px solid var(--border-color);transition:background-color .3s ease,color .3s ease,border-color .3s ease}.upload-area{background:var(--bg-secondary)!important;border:2px dashed var(--border-color)!important;transition:all .3s ease}.upload-area:hover{border-color:#4f8cff!important;background:var(--bg-tertiary)!important}.message-success{background:var(--success-color);color:#fff}.message-error{background:var(--error-color);color:#fff}.progress-bg{background:var(--bg-secondary)}.convert-form{width:100%;max-width:600px;margin:2rem auto}@media (min-width: 1200px){.convert-form{max-width:800px;margin:3rem auto}.upload-area{padding:3rem!important}h1{font-size:3.5rem}h2{font-size:2.5rem;margin-bottom:1rem}}@media (min-width: 768px) and (max-width: 1199px){.convert-form{max-width:500px}h2{font-size:2rem}}@media (max-width: 767px){.convert-form{max-width:400px;margin:1rem auto}}.page-content{width:100%;max-width:1000px;margin:0 auto;text-align:center}@media (min-width: 1200px){.page-content{max-width:1200px}}