:root{--bg:#ffffff;--bg-soft:#faf3f5;--surface:#ffffff;--surface-2:#faf3f5;--text:#241016;--text-muted:#7a5b64;--border:#ecdde1;--primary:#b5305a;--primary-2:#f4a636;--primary-hover:#932548;--primary-soft:#fbe6ec;--on-primary:#ffffff;--success:#16a34a;--success-soft:#e8f8ee;--warning:#b45309;--warning-soft:#fdf3e2;--danger:#dc2626;--danger-soft:#fdeceb;--shadow-sm:0 1px 2px rgba(36, 16, 22, 0.06);--shadow-md:0 8px 24px -8px rgba(36, 16, 22, 0.16);--shadow-lg:0 20px 45px -20px rgba(36, 16, 22, 0.28);--radius-sm:8px;--radius-md:14px;--radius-lg:20px;--max-width:760px;--font:"Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){--bg:#150a0e;--bg-soft:#1c0f14;--surface:#241419;--surface-2:#2a181e;--text:#f5e6ea;--text-muted:#b98f9a;--border:#3a2229;--primary:#e35d85;--primary-2:#f7bb5f;--primary-hover:#ea7ea0;--primary-soft:#3a1622;--on-primary:#1a060c;--success:#4ade80;--success-soft:#103322;--warning:#fbbf24;--warning-soft:#3a2a0c;--danger:#f87171;--danger-soft:#3a1414;--shadow-sm:0 1px 2px rgba(0, 0, 0, 0.4);--shadow-md:0 8px 24px -8px rgba(0, 0, 0, 0.55);--shadow-lg:0 20px 45px -20px rgba(0, 0, 0, 0.65);}
}
:root[data-theme="dark"]{--bg:#150a0e;--bg-soft:#1c0f14;--surface:#241419;--surface-2:#2a181e;--text:#f5e6ea;--text-muted:#b98f9a;--border:#3a2229;--primary:#e35d85;--primary-2:#f7bb5f;--primary-hover:#ea7ea0;--primary-soft:#3a1622;--on-primary:#1a060c;--success:#4ade80;--success-soft:#103322;--warning:#fbbf24;--warning-soft:#3a2a0c;--danger:#f87171;--danger-soft:#3a1414;--shadow-sm:0 1px 2px rgba(0, 0, 0, 0.4);--shadow-md:0 8px 24px -8px rgba(0, 0, 0, 0.55);--shadow-lg:0 20px 45px -20px rgba(0, 0, 0, 0.65);}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
html{scroll-behavior:smooth;}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;}
a{color:var(--primary);}
.wrap{max-width:var(--max-width);margin:0 auto;padding:0 1.25rem;}
[hidden]{display:none !important;}
/* ---------- header ---------- */
.page-header{position:sticky;top:0;z-index:40;background:color-mix(in srgb, var(--bg) 88%, transparent);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);}
.page-header .wrap{display:flex;align-items:center;justify-content:space-between;padding-top:0.7rem;padding-bottom:0.7rem;}
.header-controls{display:flex;align-items:center;gap:0.5rem;}
.page-header .back-link{display:inline-flex;align-items:center;gap:0.55rem;color:var(--text);text-decoration:none;font-size:0.88rem;font-weight:600;transition:opacity 0.15s ease;}
.page-header .back-link:hover{opacity:0.75;}
.page-header .back-link img{display:block;width:28px;height:28px;border-radius:8px;}
.brand-mark{background:#f3f3f3;border-radius:8px;}
/* ---------- theme switch — segmented pill ---------- */
.theme-switch{display:flex;align-items:center;gap:0;background:var(--surface-2);border:1px solid var(--border);border-radius:999px;padding:0.2rem;font-size:0.76rem;}
.theme-switch .sep{display:none;}
.theme-switch button{background:none;border:none;padding:0.3rem 0.65rem;margin:0;border-radius:999px;color:var(--text-muted);font:inherit;font-weight:600;cursor:pointer;outline:none;transition:background 0.15s ease, color 0.15s ease;}
.theme-switch button:hover{color:var(--text);}
.theme-switch button.active{color:var(--on-primary);background:var(--primary);}
.theme-switch button:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
/* ---------- language switch — a native <details> dropdown, no JS ---------- */
.lang-switch{position:relative;font-size:0.76rem;}
.lang-switch summary{display:flex;align-items:center;gap:0.3rem;list-style:none;cursor:pointer;padding:0.3rem 0.65rem;border-radius:999px;background:var(--surface-2);border:1px solid var(--border);color:var(--text-muted);font-weight:600;transition:background 0.15s ease, color 0.15s ease;}
.lang-switch summary::-webkit-details-marker{display:none;}
.lang-switch summary::marker{content:"";}
.lang-switch summary:hover{color:var(--text);}
.lang-switch summary:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
.lang-switch .chevron{width:12px;height:12px;transition:transform 0.15s ease;}
.lang-switch[open] .chevron{transform:rotate(180deg);}
.lang-switch ul{list-style:none;margin:0.35rem 0 0;padding:0.35rem;position:absolute;top:100%;inset-inline-end:0;min-width:8rem;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);box-shadow:var(--shadow-lg);z-index:50;}
.lang-switch ul a{display:block;padding:0.4rem 0.6rem;border-radius:6px;color:var(--text);text-decoration:none;font-weight:600;font-size:0.85rem;}
.lang-switch ul a:hover{background:var(--surface-2);}
.lang-switch ul a.active{color:var(--primary);}
/* ---------- hero ---------- */
.hero{position:relative;padding:3.5rem 0 2.5rem;text-align:center;overflow:hidden;}
.hero::before{content:"";position:absolute;top:-140px;left:50%;transform:translateX(-50%);width:640px;height:380px;background:radial-gradient(closest-side, color-mix(in srgb, var(--primary) 28%, transparent), transparent 70%),radial-gradient(closest-side at 70% 40%, color-mix(in srgb, var(--primary-2) 22%, transparent), transparent 70%);filter:blur(10px);pointer-events:none;z-index:-1;}
.hero .logo{display:block;margin:0 auto 1.1rem;}
.hero .logo.small{width:52px;height:52px;}
.hero h1{margin:0 0 0.6rem;font-size:clamp(1.7rem, 4vw, 2.4rem);font-weight:800;letter-spacing:-0.02em;background:linear-gradient(100deg, var(--text) 30%, var(--primary) 70%, var(--primary-2) 100%);-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero .tagline{margin:0 auto;max-width:480px;color:var(--text-muted);font-size:1.02rem;}
.hero .tagline::before{content:none;}
/* ---------- trust badges row ---------- */
.trust-row{display:flex;flex-wrap:wrap;justify-content:center;gap:0.5rem;margin-top:1.1rem;list-style:none;padding:0;}
.trust-row li{display:inline-flex;align-items:center;gap:0.35rem;background:var(--surface);border:1px solid var(--border);border-radius:999px;padding:0.35rem 0.75rem;font-size:0.78rem;font-weight:600;color:var(--text-muted);box-shadow:var(--shadow-sm);}
.trust-row svg{width:14px;height:14px;color:var(--success);flex-shrink:0;}
/* ---------- sections ---------- */
.sign-section{padding:2.2rem 0;}
.sign-section + .sign-section{border-top:1px solid var(--border);}
.sign-section h2{margin:0 0 0.3rem;font-size:1.4rem;font-weight:800;letter-spacing:-0.01em;}
.section-note,.tool-note{color:var(--text-muted);margin:0 0 1.3rem;font-size:0.95rem;}
.tool-note strong{color:var(--text);}
/* ---------- card wrapper for the whole tool ---------- */
.tool-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:1.5rem;box-shadow:var(--shadow-md);}
@media (max-width: 560px){.tool-card{padding:1.1rem;border-radius:var(--radius-md);}
}
/* ---------- wide-screen layout — more room on desktop, not just a wider centered column ---------- */
@media (min-width: 1160px){:root{--max-width:1100px;}
}
.tool-col{min-width:0;}
@media (min-width: 900px){.tool-grid{display:grid;grid-template-columns:1.15fr 0.85fr;gap:1.75rem;align-items:start;}
.tool-col-output{position:sticky;top:5.5rem;}
.result-editor{min-height:340px;}
}
/* ---------- dropzone ---------- */
.dropzone{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:0.5rem;padding:2.6rem 1.25rem;border:2px dashed var(--border);border-radius:var(--radius-md);background:var(--bg-soft);text-align:center;cursor:pointer;transition:border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;}
.dropzone:hover,.dropzone:focus-visible{border-color:var(--primary);outline:none;transform:translateY(-1px);}
.dropzone.dragover{border-color:var(--primary);border-style:solid;background:var(--primary-soft);}
.dropzone .dz-icon{width:44px;height:44px;display:flex;align-items:center;justify-content:center;border-radius:999px;background:var(--primary-soft);color:var(--primary);margin-bottom:0.2rem;}
.dropzone .dz-icon svg{width:22px;height:22px;}
.dropzone .dz-title{font-size:1rem;font-weight:700;}
.dropzone .dz-hint{color:var(--text-muted);font-size:0.82rem;}
.dropzone .dz-hint kbd{font-family:inherit;background:var(--surface);border:1px solid var(--border);border-radius:4px;padding:0.05rem 0.4rem;}
.dropzone input[type="file"]{position:absolute;inset:0;opacity:0;cursor:pointer;}
/* ---------- dropzone, once something is loaded — a slim bar instead of a big empty box ---------- */
.dropzone.compact{display:inline-flex;flex-direction:row;width:auto;padding:0.55rem 1rem 0.55rem 0.7rem;gap:0.6rem;border-style:solid;border-radius:999px;}
.dropzone.compact .dz-icon{width:26px;height:26px;margin-bottom:0;flex-shrink:0;}
.dropzone.compact .dz-icon svg{width:14px;height:14px;}
.dropzone.compact .dz-title{font-size:0.85rem;font-weight:600;color:var(--text-muted);}
.dropzone.compact .dz-hint{display:none;}
/* ---------- controls ---------- */
.control-field{display:flex;flex-direction:column;gap:0.35rem;}
.control-field label{font-size:0.78rem;font-weight:700;color:var(--text-muted);}
.control-field select,.control-field input[type="text"]{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font:inherit;font-size:0.9rem;padding:0.55rem 0.7rem;transition:border-color 0.15s ease, box-shadow 0.15s ease;}
.control-field select:focus,.control-field input[type="text"]:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft);}
/* ---------- advanced (details/summary) ---------- */
.advanced{margin-top:1.2rem;border:1px solid var(--border);border-radius:var(--radius-md);padding:0 1rem;background:var(--bg-soft);}
.advanced summary{cursor:pointer;padding:0.75rem 0;font-size:0.88rem;font-weight:700;color:var(--text);list-style:none;display:flex;align-items:center;gap:0.5rem;}
.advanced summary::-webkit-details-marker{display:none;}
.advanced summary::before{content:"";width:8px;height:8px;border-right:2px solid var(--primary);border-bottom:2px solid var(--primary);transform:rotate(-45deg);transition:transform 0.15s ease;}
.advanced[open] summary::before{transform:rotate(45deg);}
/* ---------- buttons ---------- */
.btn{font:inherit;font-size:0.88rem;font-weight:700;padding:0.6rem 1.1rem;border-radius:var(--radius-sm);border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;transition:border-color 0.15s ease, transform 0.1s ease, box-shadow 0.15s ease, background 0.15s ease;}
.btn:hover:not(:disabled){border-color:var(--primary);transform:translateY(-1px);box-shadow:var(--shadow-sm);}
.btn:active:not(:disabled){transform:translateY(0);}
.btn:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
.btn:disabled{opacity:0.45;cursor:not-allowed;}
.btn-primary{background:linear-gradient(100deg, var(--primary), var(--primary-2));border-color:transparent;color:#fff;box-shadow:var(--shadow-md);}
.btn-primary:hover:not(:disabled){color:#fff;filter:brightness(1.06);box-shadow:var(--shadow-lg);}
.btn-sm{font-size:0.78rem;padding:0.38rem 0.7rem;}
/* ---------- selected-file summary line ---------- */
.sp-file-meta{display:flex;align-items:center;gap:0.5rem;font-size:0.85rem;color:var(--text-muted);margin-top:0.6rem;}
.sp-file-meta strong{color:var(--text);}
/* ---------- page nav row ---------- */
.sp-page-nav{display:flex;align-items:center;gap:0.6rem;flex-wrap:wrap;margin-bottom:0.9rem;}
.sp-nav-btn{display:inline-flex;align-items:center;justify-content:center;width:2.2rem;height:2.2rem;padding:0;}
.sp-nav-btn svg{width:16px;height:16px;}
.sp-page-indicator{font-size:0.85rem;font-weight:700;color:var(--text-muted);min-width:6rem;text-align:center;}
/* ---------- PDF viewer stage — canvas + absolutely-positioned overlay layer ---------- */
.sp-viewer{margin-bottom:1.4rem;}
.sp-viewer-stage{position:relative;display:inline-block;max-width:100%;border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;background:var(--bg-soft);box-shadow:var(--shadow-sm);touch-action:pan-y;}
.sp-pdf-canvas{display:block;max-width:100%;height:auto;}
.sp-overlay-layer{position:absolute;inset:0;touch-action:none;pointer-events:none;}
/* ---------- signature step ---------- */
.sp-sig-step{margin-top:1.4rem;padding-top:1.4rem;border-top:1px solid var(--border);}
.sp-step-heading{margin:0 0 0.9rem;font-size:1.05rem;font-weight:800;}
/* ---------- tabs ---------- */
.sp-tabs{display:inline-flex;gap:0.2rem;background:var(--surface-2);border:1px solid var(--border);border-radius:999px;padding:0.2rem;margin-bottom:1rem;}
.sp-tab{font:inherit;font-size:0.85rem;font-weight:700;border:none;background:none;color:var(--text-muted);padding:0.45rem 1rem;border-radius:999px;cursor:pointer;transition:background 0.15s ease, color 0.15s ease;}
.sp-tab.active{background:var(--primary);color:var(--on-primary);}
.sp-tab:focus-visible{outline:2px solid var(--primary);outline-offset:2px;}
/* ---------- draw panel ---------- */
.sp-sig-panel{display:flex;flex-direction:column;gap:0.8rem;}
.sp-draw-canvas{display:block;width:100%;max-width:600px;height:220px;border:2px dashed var(--border);border-radius:var(--radius-md);background:#ffffff;cursor:crosshair;touch-action:none;}
.sp-draw-actions{display:flex;align-items:center;gap:0.9rem;}
.sp-draw-color-label{display:inline-flex;align-items:center;gap:0.4rem;font-size:0.82rem;color:var(--text-muted);cursor:pointer;}
.sp-draw-color{width:28px;height:28px;padding:0;border:1px solid var(--border);border-radius:50%;cursor:pointer;background:none;overflow:hidden;}
.sp-draw-color::-webkit-color-swatch-wrapper{padding:0;}
.sp-draw-color::-webkit-color-swatch{border:none;border-radius:50%;}
.sp-draw-color::-moz-color-swatch{border:none;border-radius:50%;}
/* ---------- upload panel reuses .dropzone; sp-sig-dropzone tweaks size ---------- */
.sp-sig-dropzone{max-width:600px;padding:2rem 1.25rem;}
/* ---------- draggable/resizable signature overlay + persisted placement chips ---------- */
.sp-placement{position:absolute;border:2px solid var(--success);border-radius:4px;background:transparent;touch-action:none;pointer-events:auto;cursor:grab;}
/* ---------- draft (unconfirmed) placement — still being positioned ---------- */
.sp-placement.active{border-color:var(--primary);box-shadow:0 0 0 3px var(--primary-soft);}
.sp-placement:active{cursor:grabbing;}
.sp-placement img{width:100%;height:100%;object-fit:contain;pointer-events:none;user-select:none;-webkit-user-select:none;}
.sp-resize-handle{position:absolute;right:-11px;bottom:-11px;width:22px;height:22px;border-radius:50%;background:var(--primary);border:2px solid var(--on-primary);cursor:nwse-resize;touch-action:none;}
.sp-remove-handle{position:absolute;top:-11px;right:-11px;width:22px;height:22px;border-radius:50%;background:var(--danger);color:#fff;border:2px solid var(--on-primary);display:flex;align-items:center;justify-content:center;font-size:0.75rem;font-weight:900;line-height:1;cursor:pointer;touch-action:none;padding:0;}
/* ---------- confirm (✓) handle — draft placements only ---------- */
.sp-confirm-handle{position:absolute;top:-11px;left:-11px;width:22px;height:22px;border-radius:50%;background:var(--success);color:#fff;border:2px solid var(--on-primary);display:flex;align-items:center;justify-content:center;font-size:0.8rem;font-weight:900;line-height:1;cursor:pointer;touch-action:none;padding:0;}
/* ---------- placement + apply actions ---------- */
.sp-hint{font-size:0.82rem;color:var(--text-muted);margin:0 0 0.7rem;}
.sp-actions{margin-top:1.2rem;padding-top:1.2rem;border-top:1px solid var(--border);}
.sp-actions-row{display:flex;flex-wrap:wrap;gap:0.6rem;}
.sp-error{color:var(--danger);font-size:0.85rem;font-weight:600;margin:0.9rem 0 0;}
/* ---------- guides ---------- */
.guides-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit, minmax(240px, 1fr));gap:0.9rem;text-align:start;}
.guides-list li{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-md);padding:1.1rem 1.2rem;box-shadow:var(--shadow-sm);transition:transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;}
.guides-list li:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:var(--primary);}
.guides-list a{color:var(--text);font-weight:700;font-size:0.95rem;text-decoration:none;}
.guides-list a:hover{color:var(--primary);}
.guides-list p{margin:0.4rem 0 0;color:var(--text-muted);font-size:0.85rem;}
/* ---------- FAQ (foldable) ---------- */
.faq-item{border-top:1px solid var(--border);}
.faq-item:first-child{border-top:none;}
.faq-item summary{cursor:pointer;padding:0.9rem 0;font-size:0.92rem;font-weight:700;color:var(--text);list-style:none;display:flex;align-items:center;justify-content:space-between;gap:0.8rem;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"";flex-shrink:0;width:8px;height:8px;border-right:2px solid var(--primary);border-bottom:2px solid var(--primary);transform:rotate(45deg);transition:transform 0.15s ease;}
.faq-item[open] summary::after{transform:rotate(-135deg);}
.faq-item summary:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px;}
.faq-item p{margin:0 0 0.95rem;color:var(--text-muted);font-size:0.88rem;}
/* ---------- article ---------- */
.article-body{text-align:start;font-size:1rem;line-height:1.75;}
.article-body h2{font-size:1.2rem;font-weight:800;margin:1.8rem 0 0.6rem;color:var(--text);background:none;-webkit-text-fill-color:initial;}
.article-body p{margin:0 0 1rem;color:var(--text);}
.article-body ul,.article-body ol{margin:0 0 1rem;padding-inline-start:1.4rem;color:var(--text);}
.article-body li{margin-bottom:0.4rem;}
.article-body code{background:var(--bg-soft);border:1px solid var(--border);border-radius:4px;padding:0.05rem 0.35rem;font-size:0.9em;}
.article-meta{color:var(--text-muted);font-size:0.82rem;margin-bottom:1.4rem;}
.article-cta{margin:1.6rem 0;padding:1.3rem 1.4rem;background:linear-gradient(135deg, var(--primary-soft), var(--bg-soft));border:1px solid var(--border);border-radius:var(--radius-lg);text-align:center;}
.article-cta a{color:var(--primary);font-weight:800;font-size:1.02rem;text-decoration:none;}
.article-cta a:hover{color:var(--primary-hover);}
.article-cta p{margin:0.4rem 0 0;color:var(--text-muted);font-size:0.85rem;}
/* ---------- footer ---------- */
.site-footer{padding:2rem 0 2.5rem;text-align:center;color:var(--text-muted);font-size:0.82rem;border-top:1px solid var(--border);margin-top:1rem;}
.site-footer a{color:var(--text-muted);}
.site-footer a:hover{color:var(--primary);}
/* ---------- toasts ---------- */
.toast-container{position:fixed;z-index:100;left:50%;bottom:1.1rem;transform:translateX(-50%);display:flex;flex-direction:column-reverse;align-items:center;gap:0.5rem;width:min(360px, calc(100vw - 2rem));pointer-events:none;}
.toast{display:flex;align-items:flex-start;gap:0.55rem;width:100%;background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:var(--radius-md);padding:0.7rem 0.85rem;font-size:0.85rem;font-weight:600;box-shadow:var(--shadow-lg);pointer-events:auto;opacity:0;transform:translateY(10px) scale(0.98);animation:toast-in 0.2s ease forwards;}
.toast.leaving{animation:toast-out 0.18s ease forwards;}
@keyframes toast-in{to{opacity:1;transform:translateY(0) scale(1);}}
@keyframes toast-out{to{opacity:0;transform:translateY(6px) scale(0.98);}}
.toast .toast-icon{flex-shrink:0;width:20px;height:20px;border-radius:50%;display:flex;align-items:center;justify-content:center;margin-top:0.05rem;}
.toast .toast-icon svg{width:12px;height:12px;}
.toast-success .toast-icon{background:var(--success-soft);color:var(--success);}
.toast-info .toast-icon{background:var(--primary-soft);color:var(--primary);}
.toast-error .toast-icon{background:var(--danger-soft);color:var(--danger);}
.toast .toast-text{flex:1;line-height:1.4;}
@media (max-width: 480px){.toast-container{bottom:0.8rem;}
}
@media (max-width: 480px){.page-header .back-link span.back-text{display:none;}
.sp-actions-row{flex-direction:column;}
.sp-actions-row .btn{width:100%;}
.sp-page-nav{justify-content:space-between;}
.sp-viewer-stage{max-width:calc(100vw - 2.6rem);}
.sp-draw-canvas{height:180px;}
.sp-resize-handle{width:30px;height:30px;right:-15px;bottom:-15px;}
.sp-remove-handle{width:30px;height:30px;top:-15px;right:-15px;font-size:0.95rem;}
.sp-confirm-handle{width:30px;height:30px;top:-15px;left:-15px;font-size:1rem;}
.sp-tabs{width:100%;}
.sp-tab{flex:1;text-align:center;}
}