/* PDF tools site — one shared stylesheet. System fonts only (no external requests). */
:root {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --surface-2: #f0f2f7;
  --text: #1a1d29;
  --muted: #545b70;
  --border: #dde1ea;
  --primary: #3949d6;
  --primary-hover: #2c3ab8;
  --primary-ink: #ffffff;
  --primary-soft: #e8ebfd;
  --accent: #0f7a5a;
  --accent-soft: #e3f4ee;
  --danger: #b42318;
  --danger-soft: #fdecea;
  --focus: #f5a524;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(20, 24, 40, .06), 0 4px 16px rgba(20, 24, 40, .06);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11131a;
    --surface: #1a1d27;
    --surface-2: #232734;
    --text: #eceef4;
    --muted: #a6adc0;
    --border: #2e3343;
    --primary: #8b97ff;
    --primary-hover: #a3adff;
    --primary-ink: #0d0f1a;
    --primary-soft: #262b4a;
    --accent: #5fd3a9;
    --accent-soft: #15302a;
    --danger: #ff8a80;
    --danger-soft: #3a1c1c;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 4px 16px rgba(0, 0, 0, .3);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.6 var(--font); }
img, svg { max-width: 100%; }
a { color: var(--primary); text-underline-offset: 2px; }
a:hover { color: var(--primary-hover); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 6px; }
[hidden] { display: none !important; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }
.narrow { max-width: 760px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--surface); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }

/* header / footer */
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 60px; flex-wrap: wrap; }
.logo { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; font-size: 1.1rem; color: var(--text); text-decoration: none; }
.logo svg { color: var(--primary); }
.site-nav { display: flex; gap: 4px 16px; flex-wrap: wrap; font-size: .95rem; }
.site-nav a { color: var(--muted); text-decoration: none; padding: 4px 0; }
.site-nav a:hover, .site-nav a[aria-current] { color: var(--text); }
.badge-local { display: inline-flex; align-items: center; gap: 6px; font-size: .85rem; color: var(--accent); background: var(--accent-soft); padding: 4px 10px; border-radius: 999px; font-weight: 600; }
.site-footer { margin-top: 64px; padding: 32px 0 40px; border-top: 1px solid var(--border); color: var(--muted); font-size: .9rem; background: var(--surface); }
.site-footer .cols { display: flex; flex-wrap: wrap; gap: 24px 48px; justify-content: space-between; }
.site-footer ul { list-style: none; padding: 0; margin: 8px 0 0; columns: 2; column-gap: 32px; }
.site-footer li { margin: 2px 0; }
.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--text); }

/* hero */
.hero { padding: 40px 0 16px; text-align: center; }
.hero h1 { font-size: clamp(1.8rem, 4.5vw, 2.6rem); line-height: 1.2; margin: 0 0 12px; letter-spacing: -.01em; }
.hero p.lead { color: var(--muted); font-size: 1.1rem; margin: 0 auto 16px; max-width: 640px; }

/* tool grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 16px; padding: 0; margin: 24px 0; list-style: none; }
.card { display: flex; flex-direction: column; gap: 6px; height: 100%; padding: 20px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); color: var(--text); text-decoration: none; transition: transform .12s ease, border-color .12s ease; }
.card:hover { transform: translateY(-2px); border-color: var(--primary); color: var(--text); }
.card .ico { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: var(--primary-soft); color: var(--primary); }
.card h2, .card h3 { font-size: 1.05rem; margin: 6px 0 0; }
.card p { margin: 0; color: var(--muted); font-size: .93rem; line-height: 1.45; }
.related .grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; }
.related .card { flex-direction: row; align-items: center; gap: 12px; padding: 12px 14px; }
.related .card .ico { width: 36px; height: 36px; flex: none; }
.related .card h3 { margin: 0; font-size: .98rem; }

/* tool area */
.tool { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; margin: 8px 0 32px; }
.dropzone { position: relative; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; gap: 8px; min-height: 210px; padding: 24px; border: 2px dashed var(--border); border-radius: 12px; background: var(--surface-2); cursor: pointer; transition: border-color .15s, background .15s; }
.dropzone:hover, .dropzone.over { border-color: var(--primary); background: var(--primary-soft); }
.dropzone.compact { min-height: 0; padding: 14px; flex-direction: row; flex-wrap: wrap; }
.dropzone.compact .dz-ico, .dropzone.compact .dz-sub { display: none; }
.dz-ico { color: var(--primary); }
.dz-title { font-weight: 600; font-size: 1.1rem; margin: 0; }
.dz-sub { color: var(--muted); margin: 0; font-size: .93rem; }
.dropzone input[type=file] { position: absolute; width: 1px; height: 1px; opacity: 0; pointer-events: none; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 10px 20px; border-radius: 10px; border: 1px solid transparent; font: inherit; font-weight: 600; cursor: pointer; text-decoration: none; }
.btn-primary { background: var(--primary); color: var(--primary-ink); }
.btn-primary:hover { background: var(--primary-hover); color: var(--primary-ink); }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; }
.btn-secondary { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-secondary:hover { border-color: var(--primary); color: var(--text); }
.btn-ghost { background: transparent; color: var(--muted); border-color: transparent; }
.btn-ghost:hover { color: var(--text); }
.btn-lg { min-height: 52px; padding: 12px 28px; font-size: 1.05rem; }

.filelist { margin-top: 16px; }
.files { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.file { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); }
.file[draggable=true] { cursor: grab; }
.file.dragging, .thumb.dragging { opacity: .4; }
.file.drag-over, .thumb.drag-over { outline: 2px dashed var(--primary); outline-offset: 2px; }
.grip { color: var(--muted); letter-spacing: -3px; user-select: none; }
.file-meta { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.file-name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-info { font-size: .85rem; color: var(--muted); }
.file-btns { display: flex; gap: 4px; }
.icon-btn { width: 36px; height: 36px; display: inline-grid; place-items: center; border-radius: 8px; border: 1px solid var(--border); background: var(--surface); color: var(--text); font: inherit; font-size: 1rem; cursor: pointer; }
.icon-btn:hover:not(:disabled) { border-color: var(--primary); color: var(--primary); }
.icon-btn:disabled { opacity: .35; cursor: default; }

.thumbs { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 14px; }
.thumb { display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 10px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface-2); cursor: grab; }
.thumb-frame { width: 100%; aspect-ratio: 3 / 4; display: grid; place-items: center; transition: transform .2s; }
.thumb-frame img { max-width: 100%; max-height: 100%; box-shadow: 0 1px 4px rgba(0, 0, 0, .2); background: #fff; }
.thumb-loading { color: var(--muted); font-size: 1.4rem; }
.thumb-label { font-size: .85rem; color: var(--muted); }
.thumb-btns { display: flex; gap: 3px; flex-wrap: wrap; justify-content: center; }
.thumb-btns .icon-btn { width: 28px; height: 30px; font-size: .9rem; }

.options { margin-top: 18px; display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.field { display: flex; flex-direction: column; gap: 6px; }
.field.full { grid-column: 1 / -1; }
.field > label, .field > .label, fieldset legend { font-weight: 600; font-size: .95rem; }
.field .help, .range-hint { color: var(--muted); font-size: .85rem; margin: 0; }
fieldset { border: 0; padding: 0; margin: 0; min-width: 0; }
.choices { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.choice { position: relative; }
.choice input { position: absolute; opacity: 0; }
.choice span { display: inline-block; padding: 8px 14px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); cursor: pointer; font-size: .93rem; }
.choice input:checked + span { background: var(--primary-soft); border-color: var(--primary); color: var(--text); font-weight: 600; }
.choice input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: 2px; }
input[type=text], input[type=number], select, textarea { font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; min-height: 44px; width: 100%; }
input[type=color] { width: 64px; height: 44px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); padding: 4px; }
input[type=range] { width: 100%; accent-color: var(--primary); }
input[type=checkbox] { width: 20px; height: 20px; accent-color: var(--primary); }
.check { display: flex; align-items: center; gap: 8px; font-weight: 600; }

.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; align-items: center; }
.status { margin: 14px 0 0; min-height: 1.6em; color: var(--muted); }
.status-error { color: var(--danger); background: var(--danger-soft); padding: 10px 14px; border-radius: 10px; }
.status-ok { color: var(--accent); font-weight: 600; }
.progress { height: 8px; border-radius: 99px; background: var(--surface-2); overflow: hidden; margin-top: 10px; }
.progress .bar { height: 100%; width: 0; background: var(--primary); transition: width .2s; }
.progress.indeterminate .bar { width: 35%; animation: slide 1.1s ease-in-out infinite; }
@keyframes slide { from { transform: translateX(-100%); } to { transform: translateX(300%); } }
@media (prefers-reduced-motion: reduce) { .progress.indeterminate .bar { animation: none; width: 100%; opacity: .5; } .card { transition: none; } }

.result { margin-top: 20px; display: grid; gap: 16px; }
.result-card { text-align: center; padding: 20px; border-radius: 12px; background: var(--accent-soft); }
.result-title { font-size: 1.2rem; font-weight: 700; margin: 0; }
.result-info { color: var(--muted); margin: 4px 0 14px; font-size: .9rem; word-break: break-all; }
.certify { display: flex; gap: 14px; padding: 16px 18px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface-2); }
.certify-icon { color: var(--accent); flex: none; padding-top: 2px; }
.certify-body p { margin: 0 0 10px; font-size: .95rem; }
.certify-title { font-weight: 700; }
.certify .certify-note { margin: 10px 0 0; color: var(--muted); font-size: .8rem; }

/* content */
.content h2 { font-size: 1.35rem; margin: 36px 0 12px; }
.steps { counter-reset: s; list-style: none; padding: 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); }
.steps li { counter-increment: s; background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 16px 16px 16px 56px; position: relative; }
.steps li::before { content: counter(s); position: absolute; left: 16px; top: 14px; width: 28px; height: 28px; border-radius: 50%; background: var(--primary); color: var(--primary-ink); font-weight: 700; display: grid; place-items: center; }
.faq details { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 0 16px; margin-bottom: 8px; }
.faq summary { cursor: pointer; font-weight: 600; padding: 14px 0; }
.faq details p { margin: 0 0 14px; color: var(--muted); }
.trust { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); margin: 32px 0; }
.trust div { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 18px; }
.trust h2 { font-size: 1.05rem; margin: 0 0 6px; }
.trust p { margin: 0; color: var(--muted); font-size: .93rem; }
.prose h1 { font-size: clamp(1.6rem, 4vw, 2.2rem); margin: 40px 0 16px; }
.prose p, .prose li { color: var(--text); }
.notfound { text-align: center; padding: 64px 0 16px; }
.notfound .code { font-size: 4rem; font-weight: 800; color: var(--primary); margin: 0; }

@media (max-width: 600px) {
  .tool { padding: 14px; }
  .site-header .wrap { padding-top: 8px; padding-bottom: 8px; }
  .badge-local { display: none; }
  .site-footer ul { columns: 1; }
  .file { flex-wrap: wrap; }
  .actions .btn { flex: 1 1 auto; }
}