@import "https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";:root{--bg:linear-gradient(145deg,#2e1065 0%,#5b21b6 45%,#7e22ce 100%);--surface:#1a1a2e;--surface-hover:#22223a;--border:#2d2d4a;--border-focus:#4361ee;--accent:#4361ee;--accent-hover:#3651d4;--accent-glow:#4361ee40;--text:#e8e8f0;--text-secondary:#9898b0;--text-muted:#6868880;--error:#ef4444;--error-bg:#ef44441a;--success:#22c55e;--radius:12px;--radius-sm:8px}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;background-attachment:fixed;min-height:100vh;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}.container{display:flex;flex-direction:column;max-width:720px;min-height:100vh;margin:0 auto;padding:48px 24px 32px}.header{text-align:center;margin-bottom:40px}.logo-mark{display:inline-flex;background:linear-gradient(135deg,var(--accent),#7c3aed);color:#fff;box-shadow:0 8px 32px var(--accent-glow);border-radius:16px;justify-content:center;align-items: center;width:56px;height:56px;margin-bottom:20px}.header h1{letter-spacing:-.02em;margin-bottom:8px;font-size:1.75rem;font-weight:700}.subtitle{color:var(--text-secondary);font-size:.95rem}.main{display:flex;flex-direction:column;flex:1;gap:20px}.tabs{display:flex;background:var(--surface);border-radius:var(--radius);border:1px solid var(--border);gap:4px;padding:4px}.tab{display:flex;color:var(--text-secondary);border-radius:var(--radius-sm);cursor:pointer;background:0 0;border:none;flex:1;justify-content:center;align-items: center;gap:8px;padding:10px 16px;transition:all .2s;font-family:inherit;font-size:.875rem;font-weight:500}.tab:hover{color:var(--text);background:var(--surface-hover)}.tab.active{background:var(--accent);color:#fff;box-shadow:0 2px 8px var(--accent-glow)}.content-area{flex:1;min-height:300px}.settings-panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);display:flex;flex-direction:column;gap:14px;min-height:300px;padding:24px}.settings-panel h3{font-size:1rem;font-weight:600}.settings-toggle{display:flex;color:var(--text);align-items: center;gap:10px;font-size:.92rem}.settings-toggle input{accent-color:var(--accent);width:16px;height:16px}.settings-help{color:var(--text-secondary);font-size:.84rem;line-height:1.5}.editor{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);resize:vertical;outline:none;width:100%;height:350px;min-height:300px;padding:20px;transition:border-color .2s,box-shadow .2s;font-family:Fira Code,Cascadia Code,JetBrains Mono,monospace;font-size:.875rem;line-height:1.7}.editor:focus{border-color:var(--border-focus);box-shadow:0 0 0 3px var(--accent-glow)}.editor::placeholder{color:var(--text-secondary);opacity:.5}.dropzone{display:flex;background:var(--surface);border:2px dashed var(--border);border-radius:var(--radius);cursor:pointer;justify-content:center;align-items: center;min-height:300px;padding:40px;transition:all .2s}.dropzone:hover,.dropzone.drag-over{border-color:var(--accent);background:#4361ee0d}.dropzone.has-file{border-style:solid;border-color:var(--success);background:#22c55e0d}.drop-prompt{display:flex;color:var(--text-secondary);flex-direction:column;align-items: center;gap:12px}.drop-prompt svg{opacity:.5}.drop-text{color:var(--text);font-size:1rem;font-weight:500}.drop-subtext{color:var(--text-secondary);font-size:.85rem}.file-info{display:flex;color:var(--success);flex-direction:column;align-items: center;gap:8px}.file-name{color:var(--text);font-size:1rem;font-weight:600}.file-size{color:var(--text-secondary);font-size:.8rem}.remove-file{border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-secondary);cursor:pointer;background:0 0;margin-top:4px;padding:6px 16px;transition:all .2s;font-family:inherit;font-size:.8rem}.remove-file:hover{border-color:var(--error);color:var(--error);background:var(--error-bg)}.controls{display:flex;flex-wrap:wrap;justify-content:space-between;align-items: center;gap:16px}.format-picker{display:flex;align-items: center;gap:12px}.format-label{color:var(--text-secondary);font-size:.85rem;font-weight:500}.format-options{display:flex;background:var(--surface);border-radius:var(--radius-sm);border:1px solid var(--border);gap:4px;padding:3px}.format-btn{display:flex;color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-radius:6px;align-items: center;gap:6px;padding:7px 14px;transition:all .2s;font-family:inherit;font-size:.825rem;font-weight:500}.format-btn:hover{color:var(--text)}.format-btn.active{background:var(--surface-hover);color:var(--text);box-shadow:0 1px 3px #0003}.convert-btn{display:flex;background:linear-gradient(135deg,var(--accent),#7c3aed);border-radius:var(--radius);color:#fff;cursor:pointer;box-shadow:0 4px 16px var(--accent-glow);border:none;align-items: center;gap:8px;padding:12px 28px;transition:all .2s;font-family:inherit;font-size:.925rem;font-weight:600}.convert-btn:hover:not(:disabled){box-shadow:0 6px 24px var(--accent-glow);transform:translateY(-1px)}.convert-btn:active:not(:disabled){transform:translateY(0)}.convert-btn:disabled{opacity:.5;cursor:not-allowed}.action-buttons{display:flex;gap:10px}.preview-btn{display:flex;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);color:var(--text);cursor:pointer;align-items: center;gap:8px;padding:12px 20px;transition:all .2s;font-family:inherit;font-size:.925rem;font-weight:600}.preview-btn:hover:not(:disabled){border-color:var(--border-focus);background:var(--surface-hover);transform:translateY(-1px)}.preview-btn:active:not(:disabled){transform:translateY(0)}.preview-btn:disabled{opacity:.5;cursor:not-allowed}.spinner{display:inline-block;animation:spin .6s linear infinite;border:2px solid #ffffff4d;border-top-color:#fff;border-radius:50%;width:16px;height:16px}@keyframes spin{to{transform:rotate(360deg)}}.error{display:flex;background:var(--error-bg);border-radius:var(--radius-sm);color:var(--error);border:1px solid #ef444440;align-items: center;gap:8px;padding:12px 16px;font-size:.875rem}.footer{text-align:center;color:var(--text-secondary);opacity:.6;margin-top:auto;padding-top:32px;font-size:.8rem}@media (max-width:600px){.container{padding:24px 16px}.controls{flex-direction:column;align-items:stretch}.format-picker{justify-content:center}.action-buttons{width:100%}.preview-btn,.convert-btn{flex:1;justify-content:center}}