/* MergeImagePDF design system — palette taken from the logo: navy wordmark, blue "Image", red "PDF" */
@font-face{font-family:"Inter";font-style:normal;font-weight:400 800;font-display:swap;src:url("../fonts/inter-latin.woff2") format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+2000-206F,U+2074,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}
:root{
  --navy:#0c2340;--navy-2:#163a66;--blue:#0f6bd6;--blue-dark:#0a4fa3;--sky:#3d9bf0;--blue-soft:#eaf3fe;--blue-line:#b9d6f7;
  --red:#d9261b;--red-dark:#b01d14;--red-soft:#fdecea;--red-line:#f6c4c0;
  --bg:#f4f8fd;--surface:#fff;--text:#0c2340;--body:#3c4d66;--muted:#5a6b82;--border:#dbe5f1;
  --success:#0f7a3d;--success-soft:#e9f8ef;--danger:#b01d14;
  --shadow-sm:0 1px 2px rgba(12,35,64,.06),0 4px 14px rgba(12,35,64,.05);--shadow:0 12px 36px rgba(12,35,64,.11);
  --radius:16px;--radius-sm:10px;--max:1180px;--ring:0 0 0 3px rgba(15,107,214,.32);
}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:92px}
body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;line-height:1.65;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:3px}
img{max-width:100%;display:block}.container{width:min(calc(100% - 40px),var(--max));margin:0 auto}
:focus-visible{outline:none;box-shadow:var(--ring);border-radius:8px}
.skip-link{position:absolute;left:12px;top:-60px;background:var(--navy);color:#fff;padding:10px 16px;border-radius:10px;z-index:100;font-weight:700}.skip-link:focus{top:12px;text-decoration:none}

/* header */
.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.site-header::before{content:"";display:block;height:3px;background:linear-gradient(90deg,var(--navy) 0,var(--blue) 55%,var(--red) 100%)}
.nav{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:11px}.brand img{display:block;height:50px;width:auto;max-width:100%}
.nav-links{display:flex;align-items:center;gap:6px;font-size:15px;font-weight:600}
.nav-links>a,.nav-dropdown>button{color:var(--navy);padding:10px 13px;border-radius:10px;transition:background .18s ease,color .18s ease}
.nav-links>a:hover,.nav-dropdown>button:hover,.nav-dropdown:focus-within>button{background:var(--blue-soft);color:var(--blue-dark);text-decoration:none}
.nav-dropdown{position:relative}.nav-dropdown>button{border:0;background:none;font:inherit;font-weight:600;cursor:pointer;min-height:44px}
.dropdown-menu{position:absolute;left:0;top:calc(100% + 4px);width:250px;background:#fff;border:1px solid var(--border);border-radius:14px;box-shadow:var(--shadow);padding:8px;display:none}
.nav-dropdown:hover .dropdown-menu,.nav-dropdown:focus-within .dropdown-menu{display:block}
.dropdown-menu a{display:block;padding:11px 12px;border-radius:9px;font-size:14px;font-weight:500;color:var(--navy)}.dropdown-menu a:hover{background:var(--blue-soft);color:var(--blue-dark);text-decoration:none}
.mobile-menu-btn{display:none;border:1px solid var(--border);background:#fff;border-radius:12px;width:46px;height:46px;cursor:pointer;color:var(--navy);place-items:center}.mobile-menu-btn svg{width:22px;height:22px}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:11px 20px;border-radius:12px;font-weight:700;font-size:15px;border:1.5px solid transparent;cursor:pointer;text-decoration:none;transition:background .18s ease,border-color .18s ease,box-shadow .18s ease,color .18s ease;touch-action:manipulation}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 6px 16px rgba(15,107,214,.28)}.btn-primary:hover{background:var(--blue-dark)}
.btn-secondary{background:#fff;color:var(--blue-dark);border-color:var(--blue-line)}.btn-secondary:hover{background:var(--blue-soft);border-color:var(--blue)}
.btn-danger{background:var(--red-soft);color:var(--danger);border-color:var(--red-line)}
.btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none}

/* hero */
.hero .container{position:relative}.hero-art{position:absolute;right:0;top:8px;width:260px;height:260px;filter:drop-shadow(0 24px 40px rgba(12,35,64,.25));pointer-events:none}
.hero{padding:76px 0 56px;background:radial-gradient(600px 300px at 88% 0,rgba(61,155,240,.18),transparent 70%),radial-gradient(500px 260px at 0 100%,rgba(217,38,27,.07),transparent 70%),linear-gradient(180deg,#eaf3fe 0,#f4f8fd 100%);border-bottom:1px solid var(--border)}
.eyebrow{display:inline-flex;align-items:center;gap:7px;background:var(--blue-soft);color:var(--blue-dark);border:1px solid var(--blue-line);padding:6px 13px;border-radius:999px;font-size:12px;font-weight:700;letter-spacing:.05em;text-transform:uppercase}
.hero h1{font-size:clamp(36px,5.6vw,60px);line-height:1.07;letter-spacing:-.035em;font-weight:800;max-width:840px;margin:18px 0 16px;color:var(--navy)}
.hero p{font-size:19px;color:var(--body);max-width:700px;margin:0}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.trust-strip{display:flex;flex-wrap:wrap;gap:10px 26px;margin:28px 0 0;padding:0;list-style:none;font-size:14px;font-weight:600;color:var(--navy)}
.trust-strip li{display:flex;align-items:center;gap:8px}.trust-strip svg{width:20px;height:20px;color:var(--success);flex:none}
.search-wrap{margin-top:30px;max-width:740px}
.search-box{display:flex;align-items:center;background:#fff;border:1.5px solid var(--blue-line);border-radius:16px;padding:6px;box-shadow:var(--shadow-sm);transition:border-color .18s ease,box-shadow .18s ease}
.search-box:focus-within{border-color:var(--blue);box-shadow:var(--ring)}
.search-box input{flex:1;border:0;outline:0;padding:13px 14px;font-size:16px;background:transparent;color:var(--text);min-width:0}.search-box input:focus-visible{box-shadow:none}.search-box button{min-width:130px}

/* sections and cards */
.section{padding:52px 0}.section-header{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:24px}
.section-header h2{margin:0;font-size:30px;letter-spacing:-.025em;color:var(--navy)}.section-header p{margin:6px 0 0;color:var(--muted);max-width:720px}
.grid{display:grid;gap:18px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm)}
.tool-card{padding:22px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.tool-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:var(--blue-line)}
.tool-icon{width:50px;height:50px;border-radius:14px;background:var(--blue-soft);display:grid;place-items:center;color:var(--blue);margin-bottom:16px}.tool-icon svg{width:24px;height:24px}
.tool-icon.is-pdf{background:var(--red-soft);color:var(--red)}
.tool-card h3{font-size:18px;margin:0 0 7px;letter-spacing:-.015em;color:var(--navy)}.tool-card h3 a:hover{color:var(--blue-dark)}
.tool-card p{font-size:15px;color:var(--muted);margin:0 0 16px}
.tool-link{font-size:14px;color:var(--blue-dark);font-weight:700}.tool-link:hover{color:var(--blue)}
.category-banner{padding:34px;background:radial-gradient(400px 220px at 100% 0,rgba(61,155,240,.35),transparent 70%),linear-gradient(135deg,var(--navy),var(--navy-2));border-radius:22px;color:#fff;box-shadow:var(--shadow)}
.category-banner h2{color:#fff}.category-banner p{color:#d4e2f5;max-width:700px;margin:8px 0 0}
.category-banner .eyebrow{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.22);color:#fff}
.category-banner .btn-secondary{background:#fff;color:var(--navy);border-color:#fff}.category-banner .btn-secondary:hover{background:var(--blue-soft)}

/* tool page */
.tool-page-hero{padding:40px 0 26px;background:linear-gradient(180deg,#fff,#f4f8fd);border-bottom:1px solid var(--border)}
.breadcrumbs{font-size:14px;color:var(--muted);margin-bottom:16px}.breadcrumbs a{color:var(--blue-dark)}.breadcrumbs a:hover{text-decoration:underline}
.tool-page-hero h1{font-size:clamp(32px,4.6vw,46px);line-height:1.1;letter-spacing:-.03em;font-weight:800;margin:14px 0 12px;color:var(--navy);max-width:900px}
.tool-page-hero>.container>p,.tool-page-hero>p{font-size:18px;color:var(--body);max-width:780px;margin:0}
.tool-layout{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(280px,.7fr);gap:24px;align-items:start}
.tool-workspace{padding:24px;border-radius:20px;box-shadow:var(--shadow)}
.tool-sidebar{padding:22px;position:sticky;top:96px;border-top:3px solid var(--blue)}
.upload-zone{border:2px dashed var(--blue-line);border-radius:18px;min-height:280px;display:grid;place-items:center;text-align:center;padding:32px;background:linear-gradient(180deg,#f7fbff,#eef6ff);cursor:pointer;transition:border-color .2s ease,background .2s ease,box-shadow .2s ease}
.upload-zone:hover{border-color:var(--blue);background:#eaf3fe}.upload-zone.dragover{border-color:var(--blue);background:#dcecfd;box-shadow:inset 0 0 0 3px rgba(15,107,214,.16)}
.upload-zone .tool-icon{width:68px;height:68px;border-radius:50%;box-shadow:0 8px 20px rgba(15,107,214,.16)}.upload-zone .tool-icon svg{width:30px;height:30px}
body[data-tool*="pdf"] .upload-zone{border-color:var(--red-line);background:linear-gradient(180deg,#fffafa,#fff1f0)}
body[data-tool*="pdf"] .upload-zone:hover,body[data-tool*="pdf"] .upload-zone.dragover{border-color:var(--red);background:#fdecea}
body[data-tool*="pdf"] .upload-zone .tool-icon{background:#fff;color:var(--red);box-shadow:0 8px 20px rgba(217,38,27,.15)}
.upload-zone h2{font-size:24px;margin:8px 0 6px;color:var(--navy);letter-spacing:-.02em}.upload-zone p{color:var(--muted);margin:0 auto 18px;font-size:15px;max-width:420px}
.hidden{display:none!important}
.status{margin-top:16px;padding:13px 15px;border-radius:12px;background:var(--blue-soft);color:var(--navy);font-size:14px;border:1px solid var(--blue-line)}
.status.success{background:var(--success-soft);color:var(--success);border-color:#b8e6c9}.status.error{background:var(--red-soft);color:var(--danger);border-color:var(--red-line)}
.file-list{display:grid;gap:10px;margin-top:18px}.file-row{display:flex;align-items:center;justify-content:space-between;gap:12px;background:#fff;border:1px solid var(--border);padding:12px 14px;border-radius:14px;box-shadow:var(--shadow-sm)}
.file-main{display:flex;align-items:center;gap:12px;min-width:0}.file-badge{width:42px;height:42px;border-radius:11px;background:var(--blue-soft);display:grid;place-items:center;font-weight:800;color:var(--blue-dark);font-size:11px;flex:none}.file-badge.is-pdf{background:var(--red-soft);color:var(--red-dark)}
.file-meta{min-width:0}.file-name{font-weight:600;font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--navy)}.file-size{font-size:12px;color:var(--muted)}
.file-actions{display:flex;gap:6px}.icon-btn{width:40px;height:40px;border-radius:10px;border:1px solid var(--border);background:#fff;cursor:pointer;color:var(--navy);font-size:16px;transition:background .15s ease,border-color .15s ease}.icon-btn:hover{background:var(--blue-soft);border-color:var(--blue-line)}.icon-btn[data-remove]:hover{background:var(--red-soft);border-color:var(--red-line);color:var(--red-dark)}
.tool-controls{display:grid;gap:14px;margin-top:18px}.control-card{padding:18px;background:#f7fbff;border:1px solid var(--border);border-radius:14px}
.control-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.field{display:grid;gap:7px}.field label{font-size:13px;font-weight:700;color:var(--navy)}
.field input,.field select{width:100%;min-height:44px;border:1.5px solid #cbd8e8;background:#fff;padding:10px 12px;border-radius:10px;outline:none;font:inherit;color:var(--text);transition:border-color .15s ease,box-shadow .15s ease}
.field input:focus,.field select:focus{border-color:var(--blue);box-shadow:var(--ring)}
.tool-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}
#process-btn{background:var(--red);box-shadow:0 8px 20px rgba(217,38,27,.28);min-width:190px;font-size:16px}#process-btn:hover{background:var(--red-dark)}#process-btn:disabled{background:#e7a19c;box-shadow:none}
.result{margin-top:20px;padding:20px;border:1px solid #b8e6c9;background:var(--success-soft);border-radius:16px}.result h3{margin:0 0 4px;color:var(--success)}.result p{margin:0;color:#25523a;font-size:14px}.result-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.preview-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:15px}.preview-card{border:1px solid var(--border);border-radius:12px;padding:8px;background:#fff}
.preview-card canvas,.preview-card img{width:100%;height:140px;object-fit:contain;background:#f1f5fa;border-radius:8px}.preview-card small{display:block;font-size:12px;color:var(--muted);margin-top:6px}
.tool-sidebar h2,.tool-sidebar h3{margin-top:0;color:var(--navy)}.tool-sidebar h2{font-size:19px}.tool-sidebar h3{font-size:15px}.tool-sidebar ul{padding-left:18px;color:var(--muted);font-size:14px}
.tool-sidebar .sidebar-block{padding-bottom:18px;margin-bottom:18px;border-bottom:1px solid var(--border)}.tool-sidebar .sidebar-block:last-child{border-bottom:0;margin-bottom:0;padding-bottom:0}
.privacy-note{display:flex;gap:10px;align-items:flex-start;background:var(--success-soft);border:1px solid #b8e6c9;color:#1d4d33;padding:12px 14px;border-radius:12px;font-size:14px;margin:0!important}.privacy-note svg{width:20px;height:20px;flex:none;color:var(--success);margin-top:2px}

/* content */
.container.prose{width:min(calc(100% - 40px),800px);margin-left:max(20px,calc((100% - var(--max))/2));margin-right:auto}.container.prose:has(.grid){width:min(calc(100% - 40px),var(--max));margin-left:auto;margin-right:auto}.container.prose:has(.grid)>p,.container.prose:has(.grid)>ul,.container.prose:has(.grid)>ol,.container.prose:has(.grid)>table{max-width:800px}.prose h2{font-size:29px;line-height:1.25;letter-spacing:-.025em;margin:40px 0 12px;color:var(--navy)}.prose h3{font-size:20px;line-height:1.3;margin:24px 0 8px;color:var(--navy)}
.prose p,.prose li{color:var(--body);font-size:17px}.prose ul,.prose ol{padding-left:22px}.prose li{margin:5px 0}.prose a{color:var(--blue-dark);text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--blue-line)}.prose a:hover{text-decoration-color:var(--blue)}
.prose .btn,.prose .pill-link,.prose .tool-link{text-decoration:none}
.prose table{width:100%;border-collapse:separate;border-spacing:0;margin:20px 0;background:#fff;border:1px solid var(--border);border-radius:14px;overflow:hidden;box-shadow:var(--shadow-sm)}
.prose th,.prose td{padding:13px 16px;border-bottom:1px solid var(--border);text-align:left;font-size:15px}.prose tr:last-child td{border-bottom:0}.prose th{background:var(--blue-soft);color:var(--navy);font-weight:700}
.prose code{background:#eaf0f8;padding:2px 6px;border-radius:6px;font-size:.92em}
.callout{padding:18px 20px;border-left:4px solid var(--blue);background:var(--blue-soft);border-radius:0 14px 14px 0;margin:20px 0;color:var(--navy)}
.mini-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.pill-link{display:inline-flex;align-items:center;min-height:38px;padding:8px 14px;border:1px solid var(--border);background:#fff;border-radius:999px;font-size:14px;font-weight:600;color:var(--navy);transition:border-color .15s ease,background .15s ease}.pill-link:hover{background:var(--blue-soft);border-color:var(--blue);text-decoration:none;color:var(--blue-dark)}
.meta-date{color:var(--muted);font-size:14px;margin:0 0 1rem!important}.author-bio{color:var(--muted);font-size:14px!important;margin:-.5rem 0 1.2rem!important}
.try-tool,.read-guide{margin:1.6rem 0;padding:1rem 1.2rem;background:var(--blue-soft);border:1px solid var(--blue-line);border-left:4px solid var(--blue);border-radius:12px}.try-tool a,.read-guide a{font-weight:700}
.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:24px}.stat{padding:18px;background:#fff;border:1px solid var(--border);border-radius:15px}.stat strong{display:block;font-size:24px}.stat span{font-size:13px;color:var(--muted)}

/* footer */
.site-footer{margin-top:56px;background:var(--navy);color:#cfdcf0;position:relative}.site-footer::before{content:"";position:absolute;left:0;right:0;top:0;height:3px;background:linear-gradient(90deg,var(--blue),var(--red))}
.footer{padding:48px 0 22px}.footer-grid{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:28px}
.site-footer .brand{background:#fff;padding:10px 16px;border-radius:14px;display:inline-flex;margin-bottom:6px}.site-footer .brand img{height:38px}
.footer h3{font-size:14px;color:#fff;margin:0 0 12px;letter-spacing:.02em}.footer a{display:block;color:#c3d3ea;font-size:14px;margin:9px 0}.footer a:hover{color:#fff}
.footer p{color:#a9bcd8;font-size:14px;max-width:360px}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:28px;padding-top:18px;font-size:13px;color:#9db2d0;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}

.notice{padding:13px 14px;background:#fff;border:1px solid var(--border);border-radius:12px;font-size:14px;color:var(--body)}
.table-scroll{overflow:auto}.range-help{font-size:13px;color:var(--muted)}.drop-hint{font-size:13px;color:var(--muted);margin-top:8px}
.progress{height:10px;background:#e3ecf7;border-radius:999px;overflow:hidden;margin-top:12px}.progress>span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--blue),var(--sky));transition:width .2s ease}
.small{font-size:13px}.muted{color:var(--muted)}.text-center{text-align:center}.empty-state{padding:40px 20px;text-align:center;border:1px dashed #b9c9de;border-radius:16px;color:var(--muted)}

@media(max-width:1100px){.hero-art{display:none}}
@media(max-width:980px){
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}.tool-layout{grid-template-columns:1fr}.tool-sidebar{position:static}.footer-grid{grid-template-columns:1.2fr 1fr 1fr}
  .nav-links{display:none}.mobile-menu-btn{display:grid}
  .nav.nav-open .nav-links{display:flex;position:absolute;left:16px;right:16px;top:calc(100% + 8px);flex-direction:column;align-items:stretch;gap:2px;background:#fff;border:1px solid var(--border);border-radius:16px;padding:12px;box-shadow:var(--shadow);max-height:calc(100vh - 100px);overflow:auto}
  .nav.nav-open .nav-dropdown>button{width:100%;text-align:left}.nav.nav-open .dropdown-menu{position:static;width:auto;display:block;border:0;box-shadow:none;padding:2px 0 8px 10px}
}
@media(max-width:700px){
  .container{width:min(calc(100% - 28px),var(--max))}.container.prose,.container.prose:has(.grid){width:calc(100% - 28px);margin-left:14px;margin-right:14px}.hero{padding:48px 0 36px}.hero h1{font-size:38px}.hero p{font-size:17px}.brand img{height:40px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.control-grid,.stats{grid-template-columns:1fr}.preview-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}.section{padding:38px 0}.section-header{display:block}
  .search-box{flex-direction:column;align-items:stretch;background:transparent;border:0;box-shadow:none;padding:0}.search-box:focus-within{box-shadow:none}.search-box input{background:#fff;border:1.5px solid var(--blue-line);border-radius:12px}.search-box button{width:100%;margin-top:8px}
  .upload-zone{min-height:240px;padding:24px 16px}.tool-page-hero{padding-top:28px}.tool-workspace{padding:16px}.category-banner{padding:24px}.tool-actions .btn{flex:1 1 100%}
}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}.tool-card:hover{transform:none}}