*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--bg:#0f0f13;--surface:#1a1b23;--surface2:#24253a;--border:#2e2f45;--text:#e4e5f1;--text2:#9091a5;--accent:#3b82f6;--accent2:#6366f1;--accent-glow:rgba(59,130,246,.3);--radius:12px;--radius-sm:8px;--font:system-ui,-apple-system,'Segoe UI',sans-serif;--mono:'Cascadia Code','Fira Code','JetBrains Mono',monospace;--shadow:0 2px 12px rgba(0,0,0,.4)}
[data-theme="light"]{--bg:#f4f5f9;--surface:#ffffff;--surface2:#ecedf2;--border:#d1d3e0;--text:#1a1b2e;--text2:#5a5b70;--shadow:0 2px 12px rgba(0,0,0,.08)}
html{font-size:15px}
body{font-family:var(--font);background:var(--bg);color:var(--text);min-height:100dvh}
.app{display:flex;min-height:100dvh}

/* ── Sidebar ── */
.sidebar{width:220px;background:var(--surface);border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;position:sticky;top:0;height:100dvh;overflow-y:auto}
.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:18px 16px;border-bottom:1px solid var(--border)}
.logo{font-size:1.1rem;font-weight:700}
.theme-toggle{background:none;border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text2);cursor:pointer;padding:6px;line-height:0;transition:.2s}
.theme-toggle:hover{color:var(--text);border-color:var(--text2)}
.nav{display:flex;flex-direction:column;padding:8px}
.nav-link{display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:var(--radius-sm);color:var(--text2);cursor:pointer;transition:.2s;font-size:.92rem;text-decoration:none}
.nav-link:hover{background:var(--surface2);color:var(--text)}
.nav-link.active{background:var(--accent);color:#fff;font-weight:600}
.nav-icon{font-size:1.05rem;width:22px;text-align:center}

/* ── Main ── */
.main{flex:1;padding:32px 40px;overflow-y:auto;max-width:960px}
.tool-panel{display:none}
.tool-panel.active{display:block}
.tool-panel h2{font-size:1.55rem;margin-bottom:24px;font-weight:700}
.tool-body{display:flex;flex-direction:column;gap:18px}

/* ── Form Elements ── */
.form-group{display:flex;flex-direction:column;gap:5px}
.form-group label{font-size:.82rem;font-weight:600;color:var(--text2);text-transform:uppercase;letter-spacing:.04em}
input[type="text"],input[type="number"],textarea,select{padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);color:var(--text);font-size:.92rem;outline:none;transition:.2s;font-family:inherit}
input[type="text"]:focus,input[type="number"]:focus,textarea:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}
textarea{resize:vertical;font-family:var(--mono);font-size:.85rem;line-height:1.5}
input[type="color"]{width:100%;height:48px;border:1px solid var(--border);border-radius:var(--radius-sm);background:none;cursor:pointer;padding:2px}
input[type="range"]{-webkit-appearance:none;appearance:none;width:100%;height:6px;border-radius:3px;background:var(--border);outline:none;cursor:pointer}
input[type="range"]::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:var(--accent);border:2px solid var(--surface);box-shadow:0 0 0 2px var(--accent)}
.form-row{display:flex;gap:12px;align-items:end}
.form-row .form-group{flex:1}

/* ── Buttons ── */
.btn-group{display:flex;gap:8px;flex-wrap:wrap}
.btn{padding:9px 18px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);color:var(--text);font-size:.85rem;font-weight:600;cursor:pointer;transition:.2s;font-family:inherit}
.btn:hover{background:var(--surface2);border-color:var(--text2)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn.primary:hover{background:var(--accent2);border-color:var(--accent2)}
.btn.small{padding:5px 12px;font-size:.78rem}
.btn.active{background:var(--accent);border-color:var(--accent);color:#fff}

/* ── Result Box ── */
.result-box{display:flex;justify-content:center;align-items:center;min-height:100px;padding:20px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.qr-result{flex-direction:column;gap:12px;min-height:280px}
.qr-result canvas{border-radius:8px}
.qr-result img{border-radius:8px}

/* ── Formatter ── */
.fmt-status{padding:8px 12px;border-radius:var(--radius-sm);font-size:.82rem}
.fmt-status.ok{background:rgba(34,197,94,.15);color:#22c55e}
.fmt-status.err{background:rgba(239,68,68,.15);color:#ef4444}

/* ── Color Picker ── */
.color-controls{display:flex;gap:20px;align-items:start;flex-wrap:wrap}
.color-main-picker{flex:0 0 120px}
.color-main-picker input[type="color"]{height:120px}
.color-info{flex:1;display:flex;flex-direction:column;gap:12px}
.color-preview{height:60px;border-radius:var(--radius-sm);border:1px solid var(--border)}
.color-values{display:flex;flex-direction:column;gap:8px}
.palette-section h3{font-size:.9rem;color:var(--text2);margin-bottom:10px}
.palette-types{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:12px}
.palette-grid{display:flex;gap:6px;flex-wrap:wrap}
.palette-swatch{width:48px;height:48px;border-radius:var(--radius-sm);border:1px solid var(--border);cursor:pointer;transition:.15s;position:relative}
.palette-swatch:hover{transform:scale(1.1);z-index:2}
.palette-swatch .swatch-hex{position:absolute;bottom:2px;left:50%;transform:translateX(-50%);font-size:.6rem;background:rgba(0,0,0,.6);color:#fff;padding:1px 4px;border-radius:3px;white-space:nowrap;opacity:0;transition:.15s}
.palette-swatch:hover .swatch-hex{opacity:1}

/* ── Gradient ── */
.gradient-preview{height:180px;border-radius:var(--radius);border:1px solid var(--border)}

/* ── Image tools ── */
.dropzone{border:2px dashed var(--border);border-radius:var(--radius);padding:48px 20px;text-align:center;cursor:pointer;transition:.2s;color:var(--text2)}
.dropzone:hover,.dropzone.dragover{border-color:var(--accent);background:var(--accent-glow);color:var(--text)}
.img-compare{display:flex;gap:16px;flex-wrap:wrap}
.img-compare-col{flex:1;min-width:200px}
.img-compare-col h4{font-size:.85rem;color:var(--text2);margin-bottom:6px}
.img-preview{display:flex;align-items:center;justify-content:center;min-height:120px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden}
.img-preview img{max-width:100%;max-height:280px;object-fit:contain;display:block}
.ocr-layout{display:flex;gap:20px;flex-wrap:wrap}
.ocr-layout .img-preview{flex:0 0 280px;min-height:200px}
.ocr-layout .ocr-result{flex:1;min-width:280px}
.ocr-progress{display:flex;align-items:center;gap:10px;margin-top:8px}
.ocr-progress-bar{flex:1;height:6px;border-radius:3px;background:var(--border);overflow:hidden;position:relative}
.ocr-progress-bar::after{content:'';display:block;height:100%;width:0%;background:var(--accent);border-radius:3px;transition:width .3s}
.ocr-progress span{font-size:.8rem;color:var(--text2);white-space:nowrap}
.ocr-progress.loading .ocr-progress-bar::after{width:var(--progress,0%)}

/* ── Responsive ── */
@media(max-width:768px){
  .app{flex-direction:column}
  .sidebar{width:100%;height:auto;position:static;flex-direction:row;flex-wrap:wrap;border-right:none;border-bottom:1px solid var(--border);padding:0}
  .sidebar-header{width:100%}
  .nav{flex-direction:row;flex-wrap:wrap;padding:6px 12px;gap:4px}
  .nav-link{font-size:.8rem;padding:6px 10px}
  .nav-link .nav-icon{width:auto}
  .main{padding:20px 16px}
  .form-row{flex-direction:column}
  .color-controls{flex-direction:column}
  .color-main-picker{flex:auto}
  .ocr-layout{flex-direction:column}
  .img-compare{flex-direction:column}
}