@import url("https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=JetBrains+Mono:wght@400;500&display=swap");:root{--bg-primary:#111113;--bg-panel:#1a1a1f;--border-color:#2a2a30;--border-active:#3a3a42;--text-primary:#e4e4e8;--text-secondary:#8a8a96;--text-muted:#55555f;--accent:#6366f1;--accent-hover:#818cf8;--color-success:#10b981;--font-body:"DM Sans",sans-serif;--font-mono:"JetBrains Mono",monospace}[data-theme=light]{--bg-primary:#f8f8fa;--bg-panel:#ffffff;--border-color:#e2e2e8;--border-active:#d0d0d8;--text-primary:#1a1a2e;--text-secondary:#6b6b7b;--text-muted:#a0a0b0}*{margin:0;padding:0;box-sizing:border-box}body,html{min-height:100vh;font-family:var(--font-body);background:var(--bg-primary);color:var(--text-primary);transition:background .3s,color .3s}.panel{background:var(--bg-panel);border:1px solid var(--border-color);border-radius:12px;transition:border-color .2s,background .3s}.panel:focus-within{border-color:var(--accent)}.panel-header{display:flex;align-items:center;justify-content:space-between;padding:14px 20px;height:60px;border-bottom:1px solid var(--border-color)}.panel-label{font-size:12px;font-weight:600;letter-spacing:.8px;text-transform:uppercase;color:var(--text-secondary)}.panel-body{padding:16px 20px 20px}.chip-grid{display:flex;flex-wrap:wrap;gap:6px}.ai-chip{padding:6px 14px;border-radius:6px;border:1px solid var(--border-color);background:transparent;color:var(--text-secondary);font-family:var(--font-body);font-size:13px;font-weight:500;cursor:pointer;transition:all .15s ease;-webkit-user-select:none;-moz-user-select:none;user-select:none}.ai-chip:hover{border-color:var(--border-active);color:var(--text-primary)}.ai-chip:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.ai-chip.active{border-color:var(--accent);color:#fff;background:var(--accent)}[data-theme=light] .ai-chip.active{color:#fff}.input-area{width:100%;min-height:300px;padding:12px 0;background:transparent;border:none;outline:none;color:var(--text-primary);font-family:var(--font-body);font-size:15px;line-height:1.7;resize:none;caret-color:var(--accent)}.input-area::placeholder{color:var(--text-muted)}.output-area{min-height:300px;max-height:480px;overflow-y:auto;font-family:var(--font-mono);font-size:13px;line-height:1.8;color:var(--text-primary);white-space:pre-wrap;word-break:break-word;scrollbar-width:thin;scrollbar-color:var(--border-active) transparent}.output-area::-webkit-scrollbar{width:4px}.output-area::-webkit-scrollbar-track{background:transparent}.output-area::-webkit-scrollbar-thumb{background:var(--border-active);border-radius:4px}.convert-btn{width:100%;padding:12px 24px;border:none;border-radius:8px;background:var(--accent);color:#fff;font-family:var(--font-body);font-size:14px;font-weight:600;cursor:pointer;transition:background .2s,opacity .2s}.convert-btn:hover{background:var(--accent-hover)}.convert-btn:disabled{opacity:.4;cursor:not-allowed}.convert-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.shortcut-hint{text-align:center;font-size:11px;color:var(--text-muted);margin-top:8px}.copy-btn{padding:5px 12px;border-radius:6px;border:1px solid var(--border-color);background:transparent;color:var(--text-secondary);font-family:var(--font-body);font-size:12px;font-weight:500;cursor:pointer;transition:all .15s ease}.copy-btn:hover{border-color:var(--accent);color:var(--accent)}.copy-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.copy-btn.copied{border-color:var(--color-success);color:var(--color-success)}.copy-btn.active{border-color:var(--accent);color:var(--accent)}.retry-btn{margin-top:12px;padding:8px 20px;border-radius:6px;border:1px solid var(--accent);background:transparent;color:var(--accent);font-family:var(--font-body);font-size:13px;font-weight:500;cursor:pointer;transition:all .15s ease}.retry-btn:hover{background:var(--accent);color:#fff}.retry-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.theme-toggle{width:36px;height:36px;border-radius:8px;border:1px solid var(--border-color);background:transparent;color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s ease;font-size:15px}.theme-toggle:hover{border-color:var(--border-active);color:var(--text-primary)}.theme-toggle:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:300px;gap:10px;color:var(--text-muted)}.empty-state-icon{opacity:.2}.empty-state-text{font-size:13px}.loading-dots{display:flex;gap:6px;align-items:center;justify-content:center;min-height:300px}.loading-dots span{width:6px;height:6px;border-radius:50%;background:var(--accent);animation:pulse 1.4s ease-in-out infinite}.loading-dots span:nth-child(2){animation-delay:.2s}.loading-dots span:nth-child(3){animation-delay:.4s}@keyframes pulse{0%,80%,to{opacity:.2;transform:scale(.8)}40%{opacity:1;transform:scale(1)}}.history-list{display:flex;flex-direction:column;gap:6px;min-height:300px;max-height:480px;overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--border-active) transparent}.history-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}.history-title{font-size:12px;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.8px}.history-clear{padding:3px 10px;border-radius:4px;border:1px solid var(--border-color);background:transparent;color:var(--text-muted);font-family:var(--font-body);font-size:11px;cursor:pointer;transition:all .15s ease}.history-clear:hover{border-color:#ef4444;color:#ef4444}.history-item{display:block;width:100%;text-align:left;padding:10px 12px;border-radius:8px;border:1px solid var(--border-color);background:transparent;cursor:pointer;transition:all .15s ease;font-family:var(--font-body)}.history-item:hover{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 5%,transparent)}.history-item-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:4px}.history-item-model{font-size:12px;font-weight:600;color:var(--accent)}.history-item-date{font-size:11px;color:var(--text-muted);font-family:var(--font-mono)}.history-item-text{font-size:12px;color:var(--text-secondary);line-height:1.5;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.app-container{position:relative;max-width:1280px;margin:0 auto;padding:32px 24px;min-height:100vh}.header-banner{position:relative;margin-bottom:32px}.header-banner .theme-toggle{position:absolute;top:0;right:0}.banner-content{display:flex;flex-direction:column;align-items:center;gap:4px;padding:4px 0 20px}.banner-title{font-family:var(--font-body);font-size:28px;font-weight:700;letter-spacing:-.5px;color:var(--text-primary);margin:0}.banner-sub{font-size:14px;color:var(--text-secondary);margin:0}.banner-line{height:1px;background:var(--border-color)}.split-layout{display:grid;grid-template-columns:1fr 1fr;grid-gap:20px;gap:20px;align-items:stretch;margin-top:24px}.char-count{font-size:11px;color:var(--text-muted);font-family:var(--font-mono);padding-top:8px;border-top:1px solid var(--border-color);text-align:right}@media (max-width:900px){.split-layout{grid-template-columns:1fr}.app-container{padding:20px 16px}.banner-title{font-size:24px}}@media (max-width:768px){.chip-grid{gap:4px}.ai-chip{padding:5px 10px;font-size:12px}.input-area{min-height:200px}.shortcut-hint{display:none}}