*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#F0F4FF;--surface:#FFFFFF;--border:#E2E8F0;--text:#1E293B;--muted:#64748B;
  --radius:14px;--shadow:0 2px 8px rgba(0,0,0,.08);--shadow-lg:0 8px 24px rgba(0,0,0,.12);
  --blue:#4F6EF7;--orange:#F97316;--cyan:#06B6D4;--green:#22C55E;--purple:#8B5CF6;
  --red:#EF4444;--teal:#14B8A6;--pink:#EC4899;--amber:#F59E0B;--indigo:#4F46E5;--sky:#0EA5E9;
}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;background:var(--bg);color:var(--text);min-height:100vh;display:flex;flex-direction:column}
.container{max-width:1100px;margin:0 auto;padding:0 24px}
.header{background:var(--surface);border-bottom:1px solid var(--border);padding:16px 0;position:sticky;top:0;z-index:100}
.header .container{display:flex;align-items:center;gap:20px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text)}
.logo-icon{font-size:24px}
.logo-text{font-size:20px;font-weight:400}
.logo-text strong{font-weight:700;color:var(--blue)}
.header-tagline{font-size:12px;color:var(--muted);margin-left:auto}
.hero{padding:64px 0 40px;text-align:center}
.hero h1{font-size:clamp(24px,4vw,40px);font-weight:800;letter-spacing:-.5px;line-height:1.2}
.hero p{margin-top:14px;font-size:17px;color:var(--muted)}
.tools-section{padding:0 0 80px}
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px}
.cat-label{grid-column:1/-1;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--muted);padding:12px 0 4px;border-bottom:1px solid var(--border);margin-top:4px}
.tool-card{background:var(--surface);border-radius:var(--radius);padding:28px 24px;text-decoration:none;color:var(--text);box-shadow:var(--shadow);transition:transform .15s,box-shadow .15s;border-top:4px solid var(--card-accent,var(--blue));display:flex;flex-direction:column;gap:8px}
.tool-card.featured{grid-column:1/-1;flex-direction:row;align-items:center;gap:20px;border-top-width:5px}
.tool-card.featured .tool-icon{font-size:44px;flex-shrink:0}
.tool-card[data-color="blue"]{--card-accent:var(--blue)}
.tool-card[data-color="orange"]{--card-accent:var(--orange)}
.tool-card[data-color="cyan"]{--card-accent:var(--cyan)}
.tool-card[data-color="green"]{--card-accent:var(--green)}
.tool-card[data-color="purple"]{--card-accent:var(--purple)}
.tool-card[data-color="red"]{--card-accent:var(--red)}
.tool-card[data-color="teal"]{--card-accent:var(--teal)}
.tool-card[data-color="pink"]{--card-accent:var(--pink)}
.tool-card[data-color="amber"]{--card-accent:var(--amber)}
.tool-card[data-color="indigo"]{--card-accent:var(--indigo)}
.tool-card[data-color="sky"]{--card-accent:var(--sky)}
.tool-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.tool-icon{font-size:32px}
.tool-card h2{font-size:18px;font-weight:700}
.tool-card p{font-size:14px;color:var(--muted);line-height:1.5}
.footer{margin-top:auto;background:var(--surface);border-top:1px solid var(--border);padding:20px 0;text-align:center;font-size:13px;color:var(--muted)}
/* Tool pages */
.back-link{display:inline-flex;align-items:center;gap:6px;text-decoration:none;color:var(--muted);font-size:14px;margin-bottom:24px;transition:color .15s}
.back-link:hover{color:var(--text)}
.tool-header{text-align:center;padding:40px 0 32px}
.tool-header .tool-icon-lg{font-size:48px}
.tool-header h1{font-size:clamp(22px,3vw,32px);font-weight:800;margin-top:12px}
.tool-header p{font-size:16px;color:var(--muted);margin-top:8px}
.accent-bar{width:48px;height:4px;border-radius:2px;margin:14px auto 0;background:var(--accent,var(--blue))}
.drop-zone{border:2px dashed var(--border);border-radius:var(--radius);padding:48px 24px;text-align:center;cursor:pointer;transition:border-color .2s,background .2s;background:var(--surface)}
.drop-zone:hover,.drop-zone.drag-over{border-color:var(--accent,var(--blue));background:#F5F7FF}
.drop-zone input[type="file"]{display:none}
.drop-zone-icon{font-size:40px;margin-bottom:12px}
.drop-zone h3{font-size:18px;font-weight:600}
.drop-zone p{font-size:14px;color:var(--muted);margin-top:6px}
.drop-zone .btn-upload{display:inline-block;margin-top:16px;padding:10px 24px;background:var(--accent,var(--blue));color:#fff;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer}
.options-panel{background:var(--surface);border-radius:var(--radius);padding:24px;margin-top:24px;box-shadow:var(--shadow)}
.options-panel h3{font-size:16px;font-weight:600;margin-bottom:16px}
.option-group{margin-bottom:16px}
.option-group label{display:block;font-size:13px;font-weight:600;color:var(--muted);margin-bottom:6px;text-transform:uppercase;letter-spacing:.5px}
.option-group input[type="text"],.option-group input[type="number"],.option-group select,.option-group textarea{width:100%;padding:9px 12px;border:1px solid var(--border);border-radius:8px;font-size:14px;outline:none;transition:border-color .2s}
.option-group input:focus,.option-group select:focus,.option-group textarea:focus{border-color:var(--accent,var(--blue))}
.option-row{display:flex;gap:16px}
.option-row .option-group{flex:1}
.radio-group{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
.radio-btn{display:flex;align-items:center;gap:6px;padding:7px 14px;border:1px solid var(--border);border-radius:8px;cursor:pointer;font-size:14px;transition:border-color .2s,background .2s}
.radio-btn input{display:none}
.radio-btn.selected{border-color:var(--accent,var(--blue));background:#EEF2FF;color:var(--accent,var(--blue));font-weight:600}
.btn-action{display:block;width:100%;margin-top:24px;padding:14px;background:var(--accent,var(--blue));color:#fff;border:none;border-radius:10px;font-size:16px;font-weight:700;cursor:pointer;transition:opacity .2s,transform .1s;position:sticky;bottom:16px;box-shadow:0 4px 16px rgba(0,0,0,.18)}
.btn-action:hover{opacity:.9}
.btn-action:active{transform:scale(.98)}
.btn-action:disabled{opacity:.5;cursor:not-allowed}
.result-section{background:var(--surface);border-radius:var(--radius);padding:28px;margin-top:24px;box-shadow:var(--shadow);text-align:center}
.result-section h3{font-size:18px;font-weight:700}
.result-section p{font-size:14px;color:var(--muted);margin-top:6px}
.btn-download{display:inline-flex;align-items:center;gap:8px;margin-top:20px;padding:12px 32px;background:var(--green);color:#fff;border:none;border-radius:10px;font-size:15px;font-weight:700;cursor:pointer;text-decoration:none;transition:opacity .15s}
.btn-download:hover{opacity:.9}
.btn-secondary{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;background:transparent;color:var(--text);border:1px solid var(--border);border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;transition:border-color .2s}
.btn-secondary:hover{border-color:var(--accent,var(--blue))}
.file-list{margin-top:20px;display:flex;flex-direction:column;gap:8px}
.file-item{display:flex;align-items:center;gap:12px;background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:10px 14px;cursor:grab}
.file-item .drag-handle{color:var(--muted);font-size:18px}
.file-item .file-name{flex:1;font-size:14px;font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.file-item .file-size{font-size:12px;color:var(--muted);white-space:nowrap}
.file-item .btn-remove{background:none;border:none;cursor:pointer;color:var(--muted);font-size:18px;line-height:1;transition:color .15s;padding:2px 6px;border-radius:4px}
.file-item .btn-remove:hover{color:var(--red)}
.file-item.sortable-ghost{opacity:.4}
.pages-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:16px;margin-top:20px}
.page-thumb{background:var(--surface);border:2px solid var(--border);border-radius:10px;overflow:hidden;cursor:pointer;transition:border-color .2s,transform .15s;position:relative;user-select:none}
.page-thumb:hover{transform:translateY(-2px);border-color:var(--accent,var(--blue))}
.page-thumb.selected{border-color:var(--accent,var(--blue))}
.page-thumb.selected::after{content:"✓";position:absolute;top:6px;right:6px;width:22px;height:22px;background:var(--accent,var(--blue));color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700}
.page-thumb canvas{width:100%;display:block}
.page-thumb .thumb-footer{padding:6px 8px;font-size:12px;color:var(--muted);text-align:center;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:center;gap:6px}
.page-thumb .btn-rotate-thumb{background:none;border:none;cursor:pointer;font-size:14px;padding:2px;opacity:.6;transition:opacity .15s}
.page-thumb .btn-rotate-thumb:hover{opacity:1}
.page-thumb .btn-delete-thumb{position:absolute;top:6px;left:6px;background:rgba(239,68,68,.85);color:#fff;border:none;border-radius:50%;width:22px;height:22px;font-size:12px;cursor:pointer;display:none;align-items:center;justify-content:center}
.page-thumb:hover .btn-delete-thumb{display:flex}
.loading-overlay{position:fixed;inset:0;background:rgba(255,255,255,.85);display:none;align-items:center;justify-content:center;flex-direction:column;gap:16px;z-index:999}
.loading-overlay.visible{display:flex}
.spinner{width:48px;height:48px;border:4px solid var(--border);border-top-color:var(--accent,var(--blue));border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.loading-text{font-size:15px;font-weight:600;color:var(--text)}
.toast-container{position:fixed;bottom:24px;right:24px;z-index:1000;display:flex;flex-direction:column;gap:8px}
.toast{padding:12px 20px;border-radius:10px;font-size:14px;font-weight:600;box-shadow:var(--shadow-lg);animation:slideIn .25s ease;max-width:320px}
.toast.success{background:#D1FAE5;color:#065F46}
.toast.error{background:#FEE2E2;color:#991B1B}
.toast.info{background:#DBEAFE;color:#1E40AF}
@keyframes slideIn{from{transform:translateX(100%);opacity:0}to{transform:none;opacity:1}}
.size-stats{display:flex;align-items:center;justify-content:center;gap:16px;margin-top:16px;flex-wrap:wrap}
.size-stat{text-align:center}
.size-stat .val{font-size:22px;font-weight:800}
.size-stat .lbl{font-size:12px;color:var(--muted)}
.size-arrow{font-size:22px;color:var(--muted)}
.size-saving{font-size:14px;font-weight:700;color:var(--green)}
.color-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:4px}
.color-swatch{width:28px;height:28px;border-radius:50%;cursor:pointer;border:3px solid transparent;transition:border-color .15s}
.color-swatch.active{border-color:var(--text)}
.tool-page{padding-bottom:60px}
.tool-content{max-width:780px;margin:0 auto}
.img-preview-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:12px;margin-top:16px}
.img-preview-item{position:relative;border-radius:8px;overflow:hidden;border:1px solid var(--border);aspect-ratio:1;cursor:grab}
.img-preview-item img{width:100%;height:100%;object-fit:cover;display:block}
.img-preview-item .btn-remove-img{position:absolute;top:4px;right:4px;background:rgba(239,68,68,.85);color:#fff;border:none;border-radius:50%;width:22px;height:22px;font-size:12px;cursor:pointer;display:none;align-items:center;justify-content:center}
.img-preview-item:hover .btn-remove-img{display:flex}
.download-list{display:flex;flex-direction:column;gap:8px;margin-top:16px}
.download-item{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;background:var(--bg);border-radius:8px}
.download-item .dl-name{font-size:14px;font-weight:500}
.download-item .btn-dl{padding:6px 14px;background:var(--green);color:#fff;border:none;border-radius:6px;font-size:13px;font-weight:600;cursor:pointer;transition:opacity .15s}
.download-item .btn-dl:hover{opacity:.9}
@media(max-width:640px){.header .container{flex-wrap:wrap;gap:10px}.header-tagline{margin-left:0;font-size:11px;width:100%;padding-bottom:4px}.hero{padding:40px 0 24px}.pages-grid{grid-template-columns:repeat(auto-fill,minmax(100px,1fr))}.option-row{flex-direction:column;gap:0}.tool-card.featured{flex-direction:column}}

/* ── Dark mode ─────────────────────────────────────────────────────────────── */
[data-theme="dark"]{--bg:#0F172A;--surface:#1E293B;--border:#334155;--text:#F1F5F9;--muted:#94A3B8;--shadow:0 2px 8px rgba(0,0,0,.35);--shadow-lg:0 8px 24px rgba(0,0,0,.55)}
[data-theme="dark"] .drop-zone{background:var(--surface)}
[data-theme="dark"] .drop-zone:hover,[data-theme="dark"] .drop-zone.drag-over{background:#1e3a5f}
[data-theme="dark"] .file-item{background:var(--surface)}
[data-theme="dark"] .tool-card:hover{background:#1E293B}
[data-theme="dark"] .toast.success{background:#064e3b;color:#6ee7b7}
[data-theme="dark"] .toast.error{background:#7f1d1d;color:#fca5a5}
[data-theme="dark"] .toast.info{background:#1e3a5f;color:#93c5fd}

/* ── Header right group ─────────────────────────────────────────────────────── */
.header-right{display:flex;align-items:center;gap:10px;margin-left:auto}
.btn-dark-mode{background:none;border:1px solid var(--border);border-radius:8px;padding:6px 10px;cursor:pointer;font-size:16px;transition:background .15s;flex-shrink:0;line-height:1}
.btn-dark-mode:hover{background:var(--bg)}

/* ── Search ─────────────────────────────────────────────────────────────────── */
.search-wrap{max-width:440px;margin:24px auto 0;position:relative}
.search-wrap input{width:100%;padding:12px 16px 12px 46px;border:1.5px solid var(--border);border-radius:12px;font-size:15px;background:var(--surface);color:var(--text);outline:none;transition:border-color .2s,box-shadow .2s}
.search-wrap input:focus{border-color:var(--blue);box-shadow:0 0 0 3px rgba(79,110,247,.12)}
.search-wrap .s-icon{position:absolute;left:14px;top:50%;transform:translateY(-50%);font-size:18px;pointer-events:none}
.no-results{grid-column:1/-1;text-align:center;padding:48px 24px;color:var(--muted);font-size:15px;display:none}

/* ── History ─────────────────────────────────────────────────────────────────── */
.history-section{margin-bottom:28px;display:none}
.history-section h3{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:1px;color:var(--muted);margin-bottom:10px}
.history-list{display:flex;flex-wrap:wrap;gap:8px}
.history-item{display:flex;align-items:center;gap:10px;padding:8px 14px;background:var(--surface);border:1px solid var(--border);border-radius:20px;text-decoration:none;color:var(--text);font-size:13px;font-weight:500;transition:border-color .15s,transform .1s;max-width:260px}
.history-item:hover{border-color:var(--blue);transform:translateY(-1px)}
.history-item .hi-icon{font-size:16px;flex-shrink:0}
.history-item .hi-info{overflow:hidden;min-width:0}
.history-item .hi-tool{font-size:10px;color:var(--muted);display:block;text-transform:uppercase;letter-spacing:.5px}
.history-item .hi-file{font-size:12px;display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.history-item .hi-date{font-size:11px;color:var(--muted);white-space:nowrap;flex-shrink:0;margin-left:6px}

/* ── Success animation ───────────────────────────────────────────────────────── */
@keyframes resultAppear{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.result-section{animation:resultAppear .35s ease}

/* ── Global drag overlay ─────────────────────────────────────────────────────── */
#globalDragOverlay{display:none;position:fixed;inset:0;background:rgba(79,110,247,.08);border:3px dashed rgba(79,110,247,.5);z-index:500;pointer-events:none;align-items:center;justify-content:center;flex-direction:column;gap:16px;border-radius:0}

/* ── Signature canvas ────────────────────────────────────────────────────────── */
.sig-tabs{display:flex;gap:6px;margin-bottom:14px}
.sig-tab{padding:8px 18px;border:1.5px solid var(--border);border-radius:8px;background:none;cursor:pointer;font-size:14px;font-weight:600;color:var(--muted);transition:all .15s}
.sig-tab.active{background:var(--accent,var(--blue));color:#fff;border-color:var(--accent,var(--blue))}
.sig-canvas-wrap{border:2px solid var(--border);border-radius:10px;overflow:hidden;background:#fff;cursor:crosshair}
.sig-canvas-wrap canvas{display:block;touch-action:none;width:100%;height:120px}
.sig-panel{display:none}.sig-panel.active{display:block}
.position-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;max-width:200px}
.pos-btn{padding:8px;border:1.5px solid var(--border);border-radius:6px;background:none;cursor:pointer;font-size:11px;text-align:center;transition:all .15s;color:var(--muted)}
.pos-btn:hover{border-color:var(--blue);color:var(--blue)}
.pos-btn.active{border-color:var(--blue);background:var(--blue);color:#fff}
.preview-page-wrap{position:relative;display:inline-block;margin-top:12px}
.preview-page-wrap canvas{display:block;border-radius:6px;box-shadow:var(--shadow)}
.sig-preview-overlay{position:absolute;top:0;left:0;pointer-events:none}

/* ── Protect badge ───────────────────────────────────────────────────────────── */
.compat-note{background:#FEF9C3;border:1px solid #FDE047;border-radius:8px;padding:10px 14px;font-size:13px;color:#713F12;margin-top:12px}

@media(max-width:640px){.header-right{margin-left:auto}.search-wrap{margin-top:16px}}