:root{--bg-color:#121212;--surface-color:#1e1e1e;--border-color:#333;--text-primary:#e0e0e0;--text-secondary:#9e9e9e;--accent-color:#d84315;--accent-hover:#f4511e;--error-color:#b71c1c;--success-color:#1b5e20}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}h1,h2,h3{color:var(--text-primary)}button{background-color:var(--accent-color);color:#fff;cursor:pointer;border:none;border-radius:4px;padding:8px 16px;font-weight:700;transition:background-color .2s}button:hover{background-color:var(--accent-hover)}[data-theme=light]{--bg-color:#f2f2f2;--surface-color:#fff;--border-color:#ccc;--text-primary:#1a1a1a;--text-secondary:#5e5e5e;--accent-color:#d84315;--accent-hover:#f4511e;--error-color:#d32f2f;--success-color:#2e7d32}.app-container{flex-direction:column;min-height:100vh;display:flex}.header{background-color:var(--surface-color);border-bottom:1px solid var(--border-color);padding:.8rem 1.5rem}.header h1{color:var(--accent-color);margin:0 0 .5rem;font-size:1.5rem}.header p{color:var(--text-secondary);margin:0;font-size:.9rem}.main-content{flex:1;justify-content:center;align-items:center;padding:1rem;display:flex}.dropzone{border:2px dashed var(--border-color);text-align:center;background-color:var(--surface-color);cursor:pointer;border-radius:8px;width:100%;max-width:600px;padding:4rem;transition:border-color .2s}.dropzone:hover{border-color:var(--accent-color)}.drop-icon{color:var(--text-secondary);margin-bottom:1rem}.dropzone h2{margin-bottom:.5rem}.dropzone p{color:var(--text-secondary)}.file-info{background-color:var(--surface-color);border:1px solid var(--border-color);border-radius:8px;width:100%;max-width:800px;padding:2rem}