:root {
  color-scheme: light;
  --ink: #17182d;
  --muted: #666b82;
  --line: #e5e7f0;
  --surface: #ffffff;
  --soft: #f5f6fb;
  --primary: #5b5cf0;
  --primary-dark: #4546d5;
  --primary-soft: #eeeeff;
  --success: #16845b;
  --danger: #c53c51;
  --shadow: 0 24px 70px rgba(41, 43, 94, 0.12);
  --small-shadow: 0 10px 30px rgba(41, 43, 94, 0.09);
  font: 100%/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-optical-sizing: auto;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 15% 10%, rgba(91, 92, 240, 0.09), transparent 26rem),
    linear-gradient(#fbfbfe 0 34rem, #fff 50rem);
}

button, input, select { font: inherit; }
button, label, select, summary { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 100;
  padding: .7rem 1rem;
  border-radius: .7rem;
  color: #fff;
  background: var(--ink);
  transform: translateY(-180%);
}
.skip-link:focus { transform: translateY(0); }

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.page-shell {
  width: min(1120px, calc(100% - 2rem));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(229, 231, 240, .75);
  background: rgba(255, 255, 255, .78);
  backdrop-filter: blur(20px) saturate(160%);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 2rem));
  min-height: 4.25rem;
  margin-inline: auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .65rem;
  color: var(--ink);
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: -.025em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border-radius: .65rem .65rem .65rem .2rem;
  color: #fff;
  background: linear-gradient(145deg, #7879ff, #4c4ddc);
  box-shadow: 0 8px 20px rgba(91, 92, 240, .28);
}

.site-header nav { display: flex; gap: .25rem; }
.site-header nav a {
  padding: .55rem .8rem;
  border-radius: .65rem;
  color: #51566b;
  font-size: .92rem;
  font-weight: 650;
  text-decoration: none;
}
.site-header nav a:hover { color: var(--ink); background: #f2f3f9; }

.tool-hero, .home-hero {
  padding: 4.5rem 0 2.2rem;
  text-align: center;
}

.home-hero { padding-block: 8rem 5rem; }
.tool-hero { width: min(1180px, calc(100% - 2rem)); padding-top: 2rem; }

.eyebrow {
  color: var(--primary);
  font-size: .72rem;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }
h1 {
  margin: .7rem auto .9rem;
  font-size: clamp(2.45rem, 7vw, 4.5rem);
  line-height: 1.02;
  letter-spacing: -.055em;
}
.tool-hero h1 { font-size: clamp(2.35rem, 6vw, 4rem); }
.tool-hero > p, .home-hero > p {
  max-width: 48rem;
  margin: 0 auto;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.2rem);
}

.breadcrumbs {
  display: flex;
  justify-content: center;
  gap: .5rem;
  margin-bottom: 1.8rem;
  color: #777b8f;
  font-size: .84rem;
}
.breadcrumbs a { text-decoration: none; }
.breadcrumbs a:hover { color: var(--primary); }
.tool-hero .breadcrumbs { justify-content: flex-start; }

.trust-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .75rem 1.4rem;
  margin-top: 1.55rem;
  color: #4d5267;
  font-size: .86rem;
  font-weight: 650;
}
.trust-row b { color: var(--success); }

.converter-shell { margin-bottom: 6rem; }

.upload-panel {
  position: relative;
  display: grid;
  min-height: 28rem;
  padding: 4rem 2rem;
  place-items: center;
  align-content: center;
  overflow: hidden;
  border: 1px solid #dfe1ee;
  border-radius: 1.8rem;
  background: rgba(255, 255, 255, .92);
  box-shadow: var(--shadow);
  text-align: center;
  transition: border-color .2s ease, background-color .2s ease, transform .2s ease;
}

.upload-panel::before {
  content: "";
  position: absolute;
  inset: .7rem;
  pointer-events: none;
  border: 1.5px dashed #cfd2e5;
  border-radius: 1.35rem;
}

.upload-panel.is-dragover {
  border-color: var(--primary);
  background: #f7f7ff;
  transform: scale(1.006);
}
.upload-panel.is-dragover::before { border-color: var(--primary); }

.upload-panel h3 {
  margin: 1.4rem 0 .45rem;
  font-size: clamp(1.45rem, 4vw, 2rem);
  letter-spacing: -.03em;
}
.upload-panel > p { max-width: 34rem; margin-bottom: 1.5rem; color: var(--muted); }
.upload-panel .upload-limits { margin: 1.3rem 0 0; color: #8a8ea1; font-size: .8rem; }

.upload-illustration { position: relative; width: 6.2rem; height: 5.2rem; }
.picture-card {
  position: absolute;
  display: grid;
  width: 4.25rem;
  height: 4.25rem;
  place-items: center;
  border-radius: 1rem;
  background: #fff;
  box-shadow: var(--small-shadow);
}
.picture-card::before {
  content: "";
  position: absolute;
  inset: .7rem;
  border-radius: .55rem;
  background: linear-gradient(155deg, #cceeff 0 45%, #9fddc4 46% 65%, #71c49e 66%);
}
.picture-card-back { left: .2rem; top: .55rem; transform: rotate(-9deg); }
.picture-card-front {
  right: .2rem;
  top: .15rem;
  z-index: 2;
  color: #fff;
  font-size: 1.4rem;
  font-weight: 400;
  background: linear-gradient(145deg, #7374ff, #4a4bd9);
  transform: rotate(5deg);
}
.picture-card-front::before { display: none; }

.upload-actions, .toolbar-actions, .dialog-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .65rem;
}

.button {
  display: inline-flex;
  min-height: 2.9rem;
  padding: .7rem 1.05rem;
  align-items: center;
  justify-content: center;
  gap: .55rem;
  border: 1px solid transparent;
  border-radius: .82rem;
  cursor: pointer;
  font-weight: 750;
  line-height: 1.2;
  text-decoration: none;
  transition: transform .12s ease, box-shadow .2s ease, background-color .2s ease, border-color .2s ease;
}
.tool-icon-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.button-icon { width: 1.05rem; height: 1.05rem; flex: 0 0 auto; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.button-icon-dropbox { color: #0061ff; fill: currentColor; stroke: none; }
.button:active { transform: scale(.97); transition-duration: .08s; }
.button:focus-visible, .icon-button:focus-visible, .paper-size-trigger:focus-visible, .paper-size-option:focus-visible, select:focus-visible, input:focus-visible, summary:focus-visible {
  outline: 3px solid rgba(91, 92, 240, .23);
  outline-offset: 2px;
}
.button-primary {
  color: #fff;
  background: linear-gradient(145deg, #6869f6, #5051e2);
  box-shadow: 0 10px 22px rgba(91, 92, 240, .24);
}
.button-primary:hover { background: linear-gradient(145deg, #5f60ed, #4647d4); box-shadow: 0 12px 28px rgba(91, 92, 240, .32); }
.button-secondary { border-color: var(--line); color: #3e4257; background: #fff; }
.button-secondary:hover { border-color: #cacde0; background: #fafaff; }
.button-quiet { color: #666b82; background: transparent; }
.button-quiet:hover { background: var(--soft); }
.button-small { min-height: 2.35rem; padding: .5rem .75rem; border-radius: .68rem; font-size: .82rem; }
.button-success { min-height: 2.45rem; color: #fff; background: var(--success); }
.danger-text { color: var(--danger); }

.editor {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 22rem;
  align-items: start;
  overflow: clip;
  border: 1px solid var(--line);
  border-radius: 1.5rem;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.queue-panel { min-height: 39rem; padding: 1.6rem; background: #f7f8fc; }
.queue-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.queue-toolbar h3, .settings-heading h3 { margin: .2rem 0 0; font-size: 1.3rem; letter-spacing: -.025em; }
.drag-hint { margin: .8rem 0 1.2rem; color: #7c8195; font-size: .82rem; }

.image-queue {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(10.5rem, 1fr));
  gap: 1rem;
  padding: 0;
  margin: 0;
  list-style: none;
}

.file-card {
  position: relative;
  min-width: 0;
  overflow: hidden;
  border: 1px solid #e1e3ed;
  border-radius: 1rem;
  background: #fff;
  box-shadow: 0 5px 16px rgba(41, 43, 94, .06);
  transition: transform .22s cubic-bezier(.2, .8, .2, 1), opacity .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.file-card:hover { border-color: #cfd2e4; box-shadow: 0 11px 25px rgba(41, 43, 94, .11); transform: translateY(-2px); }
.file-card.is-dragging { opacity: .5; box-shadow: 0 18px 40px rgba(41, 43, 94, .2); transform: scale(1.025) rotate(1deg); }
.file-card.is-drop-target { border-color: var(--primary); transform: translateY(-3px); }

.drag-handle {
  position: absolute;
  top: .55rem;
  left: .55rem;
  z-index: 2;
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 0;
  border-radius: .6rem;
  color: #62677b;
  background: rgba(255, 255, 255, .9);
  box-shadow: 0 3px 10px rgba(36, 38, 74, .12);
  cursor: grab;
}
.drag-handle:active { cursor: grabbing; }

.preview-frame {
  display: grid;
  height: 11.5rem;
  padding: 1rem;
  place-items: center;
  overflow: hidden;
  background:
    linear-gradient(45deg, #eceef5 25%, transparent 25%),
    linear-gradient(-45deg, #eceef5 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #eceef5 75%),
    linear-gradient(-45deg, transparent 75%, #eceef5 75%), #f8f9fc;
  background-position: 0 0, 0 .5rem, .5rem -.5rem, -.5rem 0;
  background-size: 1rem 1rem;
}
.preview-frame img {
  display: block;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 5px 9px rgba(30, 32, 62, .18));
  transition: transform .28s cubic-bezier(.2, .8, .2, 1);
}
.format-placeholder { display: none; color: #686d82; font-weight: 800; text-align: center; }
.preview-frame.preview-unavailable img { display: none; }
.preview-frame.preview-unavailable .format-placeholder { display: block; }

.file-info { padding: .8rem .85rem .35rem; }
.file-name { overflow: hidden; margin: 0; font-size: .86rem; font-weight: 750; text-overflow: ellipsis; white-space: nowrap; }
.file-meta { margin: .18rem 0 0; color: #868a9b; font-size: .72rem; }

.file-actions {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: .25rem;
  padding: .45rem .55rem .65rem;
}
.icon-button {
  display: grid;
  min-width: 2.6rem;
  min-height: 2.6rem;
  place-items: center;
  border: 0;
  border-radius: .65rem;
  color: #5d6175;
  background: transparent;
  cursor: pointer;
  font-weight: 800;
  transition: transform .12s ease, background-color .15s ease, color .15s ease;
}
.icon-button:hover { color: var(--ink); background: #f0f1f7; }
.icon-button:active { transform: scale(.9); }
.icon-button.remove:hover { color: var(--danger); background: #fff0f2; }

.settings-panel {
  position: sticky;
  top: 5.2rem;
  display: grid;
  gap: 1.15rem;
  padding: 1.6rem;
  border-left: 1px solid var(--line);
  background: #fff;
}
.settings-heading { display: flex; align-items: center; justify-content: space-between; }
.settings-icon { display: grid; width: 2.4rem; height: 2.4rem; place-items: center; border-radius: .75rem; color: var(--primary); background: var(--primary-soft); }

.field { display: grid; gap: .42rem; color: #4e5267; font-size: .83rem; font-weight: 750; }
.field select, .field input {
  width: 100%;
  min-height: 2.85rem;
  border: 1px solid #d9dce8;
  border-radius: .75rem;
  color: var(--ink);
  background: #fff;
}
.field select { padding: 0 2.4rem 0 .8rem; }
.field input { padding: .65rem .8rem; }

.paper-size-trigger {
  display: flex;
  width: 100%;
  min-height: 3.25rem;
  padding: .65rem .75rem;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  border: 1px solid #d9dce8;
  border-radius: .75rem;
  color: var(--ink);
  background: #fff;
  cursor: pointer;
  text-align: left;
  transition: border-color .15s ease, box-shadow .15s ease, transform .1s ease-out;
}
.paper-size-trigger:hover { border-color: #bdc1d4; box-shadow: 0 5px 14px rgba(41, 43, 94, .07); }
.paper-size-trigger:active { transform: scale(.99); }
.paper-size-trigger:disabled { cursor: wait; opacity: .65; }
.paper-size-trigger-copy { display: grid; min-width: 0; }
.paper-size-trigger-copy strong { font-size: .87rem; }
.paper-size-trigger-copy small { color: #85899a; font-size: .68rem; font-weight: 650; }
.paper-size-trigger-action { display: flex; flex: 0 0 auto; align-items: center; gap: .35rem; color: var(--primary-dark); font-size: .72rem; font-weight: 800; }
.paper-size-trigger-action span { font-size: 1rem; line-height: 1; }

.segmented-field { padding: 0; margin: 0; border: 0; }
.segmented-field legend { margin-bottom: .42rem; color: #4e5267; font-size: .83rem; font-weight: 750; }
.segmented-control { display: grid; grid-template-columns: repeat(3, 1fr); gap: .35rem; }
.margin-control { grid-template-columns: repeat(4, 1fr); }
.segmented-control label, .fit-options label { cursor: pointer; }
.segmented-control input, .fit-options input { position: absolute; opacity: 0; pointer-events: none; }
.segmented-control label > span {
  display: grid;
  min-height: 2.65rem;
  place-items: center;
  border: 1px solid #dfe1eb;
  border-radius: .68rem;
  color: #686c7f;
  font-size: .77rem;
  font-weight: 750;
}
.segmented-control input:checked + span, .fit-options input:checked + span { border-color: var(--primary); color: var(--primary-dark); background: var(--primary-soft); box-shadow: inset 0 0 0 1px var(--primary); }
.segmented-control input:focus-visible + span, .fit-options input:focus-visible + span { outline: 3px solid rgba(91, 92, 240, .2); outline-offset: 2px; }
.margin-control label > span { min-height: 4.75rem; padding: .45rem .2rem; gap: .3rem; transition: border-color 120ms ease, background-color 120ms ease, transform 100ms ease-out; }
.margin-control label:active > span { transform: scale(.98); }
.margin-preview {
  display: block;
  width: 2.45rem;
  height: 1.9rem;
  padding: var(--preview-margin);
  overflow: hidden;
  border: 1px solid #cfd2df;
  border-radius: .22rem;
  background: #fff;
  box-shadow: 0 2px 5px rgba(36, 38, 76, .1);
}
.margin-preview::after {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: .08rem;
  background:
    radial-gradient(circle at 76% 24%, #fff7bc 0 8%, transparent 9%),
    linear-gradient(145deg, transparent 45%, rgba(32, 65, 157, .34) 46% 58%, transparent 59%),
    linear-gradient(155deg, transparent 35%, rgba(57, 105, 203, .55) 36% 63%, transparent 64%),
    linear-gradient(#9bd8ff 0 58%, #76bb7a 59%);
  content: "";
}
.margin-preview-none { --preview-margin: 0; }
.margin-preview-small { --preview-margin: 3px; }
.margin-preview-large { --preview-margin: 6px; }
.margin-preview-custom { --preview-margin: 4.7px; }
.custom-margin-field {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  margin-top: .45rem;
  padding: .6rem .65rem;
  border: 1px solid #dfe1eb;
  border-radius: .72rem;
  color: #686c7f;
  background: #fff;
  cursor: text;
}
.custom-margin-copy { display: grid; min-width: 0; }
.custom-margin-copy b { color: var(--ink); font-size: .76rem; }
.custom-margin-copy small { color: #85899a; font-size: .65rem; }
.unit-field { display: flex; align-items: center; min-width: 6.25rem; overflow: hidden; border: 1px solid #d9dce8; border-radius: .62rem; background: #fff; }
.unit-field input { width: 4.1rem; min-height: 2.5rem; padding: .45rem .25rem .45rem .65rem; border: 0; color: var(--ink); background: transparent; outline: 0; font-weight: 750; }
.unit-field > span { padding-right: .6rem; color: #85899a; font-size: .72rem; font-weight: 700; }
.segmented-field:has(input[value="custom"]:checked) .custom-margin-field,
.custom-margin-field:focus-within { border-color: var(--primary); background: var(--primary-soft); box-shadow: inset 0 0 0 1px var(--primary); }
.custom-margin-field:focus-within .unit-field { border-color: var(--primary); outline: 3px solid rgba(91, 92, 240, .16); }
.unit-field input:invalid { color: var(--danger); }

.fit-options { display: grid; grid-template-columns: 1fr 1fr; gap: .45rem; }
.fit-options label > span { display: grid; min-height: 4.2rem; padding: .65rem; place-content: center; border: 1px solid #dfe1eb; border-radius: .72rem; text-align: center; }
.fit-options b { font-size: .76rem; }
.fit-options small { margin-top: .15rem; color: #85899a; font-size: .68rem; }

.filename-field { display: flex; align-items: center; border: 1px solid #d9dce8; border-radius: .75rem; overflow: hidden; }
.filename-field:focus-within { outline: 3px solid rgba(91, 92, 240, .2); outline-offset: 2px; }
.filename-field input { min-width: 0; border: 0; outline: 0 !important; }
.filename-field span { padding-right: .8rem; color: #8a8e9f; font-weight: 650; }

.convert-button { width: 100%; min-height: 3.35rem; justify-content: space-between; padding-inline: 1rem; }
.convert-button:disabled { cursor: wait; opacity: .65; }

.progress-wrap { display: grid; gap: .45rem; }
.progress-track { height: .45rem; overflow: hidden; border-radius: 999px; background: #e9eaf3; }
.progress-track span { display: block; width: 0; height: 100%; border-radius: inherit; background: linear-gradient(90deg, #7273ff, #4bbf9b); transition: width .2s ease-out; }
.progress-wrap p { margin: 0; color: #767a8d; font-size: .75rem; }

.failure-panel { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: .75rem; padding: .85rem; border: 1px solid #f0c9ce; border-radius: .85rem; background: #fff5f6; }
.failure-panel[hidden] { display: none; }
.failure-panel:focus { outline: 3px solid rgba(213, 61, 80, .18); outline-offset: 2px; }
.failure-panel strong, .failure-panel small { display: block; }
.failure-panel small { margin-top: .15rem; color: #8a4a53; }
.failure-panel .button { grid-column: 1 / -1; color: #9c2434; border-color: #e6b6bd; background: #fff; }
.failure-mark { width: 2.15rem; height: 2.15rem; overflow: visible; fill: none; stroke: var(--danger); stroke-width: 2.8; stroke-linecap: round; }
.failure-mark circle { transform-origin: center; animation: failure-ring .35s ease-out both; }
.failure-mark path { stroke-dasharray: 32; stroke-dashoffset: 32; animation: failure-cross .3s .18s ease-out forwards; }
@keyframes failure-ring { from { opacity: 0; transform: scale(.65); } 70% { transform: scale(1.08); } to { opacity: 1; transform: scale(1); } }
@keyframes failure-cross { to { stroke-dashoffset: 0; } }

.result-panel { display: grid; grid-template-columns: auto 1fr; gap: .75rem; padding: .85rem; border: 1px solid #cce8dc; border-radius: .85rem; background: #f1fbf7; }
.result-panel .button { grid-column: 1 / -1; }
.result-panel strong, .result-panel small { display: block; }
.result-panel small { margin-top: .15rem; color: #5d756a; }
.success-mark { display: grid; width: 2rem; height: 2rem; place-items: center; border-radius: 50%; color: #fff; background: var(--success); font-weight: 900; }
.privacy-note { display: flex; gap: .45rem; margin: 0; color: #85899a; font-size: .71rem; }
.privacy-note a { color: var(--primary-dark); }

.status-message { min-height: 1.5rem; margin: .8rem 0 0; color: var(--danger); font-size: .86rem; text-align: center; }
.status-message.is-success { color: var(--success); }

.dropbox-import-indicator {
  position: fixed;
  z-index: 70;
  left: 50%;
  bottom: clamp(1rem, 4vh, 2rem);
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .45rem .75rem .45rem .45rem;
  border: 1px solid rgba(91, 92, 240, .18);
  border-radius: 999px;
  color: var(--primary-dark);
  background: rgba(255, 255, 255, .96);
  box-shadow: 0 12px 34px rgba(31, 34, 70, .18);
  transform: translateX(-50%);
  animation: dropbox-indicator-in .2s ease-out;
  backdrop-filter: blur(12px);
}
.dropbox-import-icon { width: 2.8rem; height: 2.8rem; overflow: visible; }
.dropbox-import-page { fill: #f3f3ff; stroke: var(--primary); stroke-width: 2.2; stroke-linejoin: round; }
.dropbox-import-fold { fill: none; stroke: var(--primary); stroke-width: 2.2; stroke-linejoin: round; }
.dropbox-import-card { opacity: 0; transform-box: fill-box; transform-origin: center; animation: dropbox-card-load 2.1s cubic-bezier(.2, .8, .2, 1) infinite; }
.dropbox-import-card rect { fill: #fff; stroke: #7778f5; stroke-width: 1.5; }
.dropbox-import-card circle { fill: #f2bb55; }
.dropbox-import-card path { fill: #54b99a; }
.dropbox-import-card-two { animation-delay: .7s; }
.dropbox-import-card-three { animation-delay: 1.4s; }
.dropbox-import-check, .dropbox-import-error { fill: none; stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; opacity: 0; }
.dropbox-import-indicator > span { font-size: .76rem; font-weight: 800; white-space: nowrap; }
.dropbox-import-indicator.is-complete { color: var(--success); border-color: rgba(24, 148, 105, .2); }
.dropbox-import-indicator.is-complete .dropbox-import-page { fill: #ecfaf4; stroke: var(--success); }
.dropbox-import-indicator.is-complete .dropbox-import-fold { stroke: var(--success); }
.dropbox-import-indicator.is-complete .dropbox-import-card,
.dropbox-import-indicator.is-error .dropbox-import-card { animation: none; opacity: 0; }
.dropbox-import-indicator.is-complete .dropbox-import-check { opacity: 1; stroke: var(--success); stroke-dasharray: 28; animation: dropbox-check-in .35s ease-out both; }
.dropbox-import-indicator.is-error { color: var(--danger); border-color: rgba(213, 61, 80, .2); }
.dropbox-import-indicator.is-error .dropbox-import-page { fill: #fff2f4; stroke: var(--danger); }
.dropbox-import-indicator.is-error .dropbox-import-fold,
.dropbox-import-indicator.is-error .dropbox-import-error { opacity: 1; stroke: var(--danger); }

@keyframes dropbox-indicator-in {
  from { opacity: 0; transform: translate(-50%, .65rem) scale(.96); }
}
@keyframes dropbox-card-load {
  0%, 12% { opacity: 0; transform: translateY(-18px) scale(.82); }
  22%, 58% { opacity: 1; }
  58% { transform: translateY(7px) scale(.86); }
  72%, 100% { opacity: 0; transform: translateY(10px) scale(.8); }
}
@keyframes dropbox-check-in {
  from { stroke-dashoffset: 28; }
  to { stroke-dashoffset: 0; }
}

.url-dialog, .paper-size-dialog {
  width: min(34rem, calc(100% - 2rem));
  padding: 0;
  border: 1px solid rgba(255, 255, 255, .8);
  border-radius: 1.3rem;
  background: rgba(255, 255, 255, .96);
  box-shadow: 0 30px 100px rgba(22, 24, 50, .3);
  opacity: 0;
  transform: translateY(1rem) scale(.97);
  transition: opacity .22s ease, transform .3s cubic-bezier(.2, .8, .2, 1), overlay .22s allow-discrete, display .22s allow-discrete;
}
.url-dialog[open], .paper-size-dialog[open] { opacity: 1; transform: translateY(0) scale(1); }
@starting-style { .url-dialog[open], .paper-size-dialog[open] { opacity: 0; transform: translateY(1rem) scale(.97); } }
.url-dialog::backdrop, .paper-size-dialog::backdrop { background: rgba(29, 31, 58, .45); backdrop-filter: blur(7px); transition: background .2s ease; }
.url-dialog form { display: grid; gap: 1.1rem; padding: 1.5rem; }
.url-dialog form > p { margin: 0; color: var(--muted); font-size: .82rem; }
.dialog-heading { display: flex; align-items: start; justify-content: space-between; gap: 1rem; }
.dialog-heading h2 { margin: .25rem 0 0; font-size: 1.45rem; letter-spacing: -.03em; }
.dialog-actions { justify-content: flex-end; }

.paper-size-dialog {
  width: min(54rem, calc(100% - 2rem));
  max-height: min(50rem, calc(100dvh - 2rem));
  overflow: hidden;
}
.paper-size-dialog-shell { display: grid; max-height: min(50rem, calc(100dvh - 2rem)); grid-template-rows: auto auto minmax(0, 1fr); }
.paper-size-dialog-heading { padding: 1.4rem 1.5rem .75rem; }
.paper-size-dialog-heading p { margin: .35rem 0 0; color: var(--muted); font-size: .82rem; font-weight: 550; }
.paper-size-search {
  display: flex;
  min-height: 3rem;
  margin: 0 1.5rem 1rem;
  padding-inline: .8rem;
  align-items: center;
  gap: .55rem;
  border: 1px solid #d9dce8;
  border-radius: .8rem;
  color: #7c8092;
  background: #f8f8fc;
}
.paper-size-search:focus-within { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px rgba(91, 92, 240, .14); }
.paper-size-search input { width: 100%; min-width: 0; padding: .6rem 0; border: 0; outline: 0; color: var(--ink); background: transparent; font-size: .88rem; }
.paper-size-groups { overflow: auto; padding: 0 1.5rem 1.5rem; overscroll-behavior: contain; }
.paper-size-group + .paper-size-group { margin-top: 1.35rem; }
.paper-size-group h3 { margin: 0 0 .55rem; color: #676b80; font-size: .72rem; letter-spacing: .08em; text-transform: uppercase; }
.paper-size-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr)); gap: .6rem; }
.paper-size-option {
  display: grid;
  min-height: 4.2rem;
  padding: .65rem .7rem;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: .65rem;
  border: 1px solid #e0e2ec;
  border-radius: .85rem;
  color: var(--ink);
  background: #fff;
  cursor: pointer;
  text-align: left;
  transition: transform .1s ease-out, border-color .15s ease, background-color .15s ease, box-shadow .15s ease;
}
.paper-size-option:hover { border-color: #c7cada; background: #fbfbff; box-shadow: 0 6px 16px rgba(41, 43, 94, .07); }
.paper-size-option:active { transform: scale(.98); }
.paper-size-option.is-selected { border-color: var(--primary); background: var(--primary-soft); box-shadow: inset 0 0 0 1px var(--primary); }
.paper-size-icon { width: 1.35rem; height: 1.75rem; border: 1.5px solid #a7abbe; border-radius: .18rem; background: linear-gradient(135deg, #fff 0 72%, #e8e9f2 73%); box-shadow: 0 2px 5px rgba(41, 43, 94, .08); }
.paper-size-option.is-selected .paper-size-icon { border-color: var(--primary); background: #fff; }
.paper-size-option-copy { display: grid; min-width: 0; }
.paper-size-option-copy strong { font-size: .8rem; line-height: 1.2; }
.paper-size-option-copy small { margin-top: .1rem; color: #85899a; font-size: .64rem; font-weight: 650; line-height: 1.2; }
.paper-size-check { color: var(--primary); font-size: .78rem; font-weight: 900; opacity: 0; transform: scale(.7); transition: opacity .12s ease, transform .12s ease; }
.paper-size-option.is-selected .paper-size-check { opacity: 1; transform: scale(1); }
.paper-size-empty { margin: 2.5rem 0; color: var(--muted); text-align: center; }

.content-section { padding-block: 5.5rem; }
.content-intro { max-width: 42rem; margin-bottom: 2rem; }
.content-intro h2, .two-column-content h2 { margin: .4rem 0 .6rem; font-size: clamp(2rem, 5vw, 3rem); line-height: 1.08; letter-spacing: -.045em; }
.content-intro p, .two-column-content p { color: var(--muted); }
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; padding: 0; margin: 0; list-style: none; }
.steps-grid li { padding: 1.5rem; border: 1px solid var(--line); border-radius: 1.2rem; background: #fff; box-shadow: var(--small-shadow); }
.steps-grid li > span { display: grid; width: 2.4rem; height: 2.4rem; margin-bottom: 1.2rem; place-items: center; border-radius: .75rem; color: var(--primary); background: var(--primary-soft); font-weight: 850; }
.steps-grid h3 { margin-bottom: .45rem; font-size: 1.08rem; }
.steps-grid p { margin: 0; color: var(--muted); font-size: .9rem; }

.muted-section { background: #f6f7fb; }
.two-column-content { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 4rem; }
.format-cloud { display: flex; flex-wrap: wrap; justify-content: center; gap: .7rem; }
.format-cloud span { padding: .75rem 1rem; border: 1px solid #dfe1ec; border-radius: .85rem; color: #565b70; background: #fff; box-shadow: var(--small-shadow); font-weight: 800; transform: rotate(var(--tilt, -2deg)); }
.format-cloud span:nth-child(2n) { --tilt: 2deg; }
.format-cloud span:nth-child(3n) { --tilt: -1deg; color: var(--primary-dark); background: var(--primary-soft); }

.faq-section { display: grid; grid-template-columns: minmax(15rem, .75fr) 1.25fr; gap: 4rem; }
.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary { display: flex; min-height: 4.2rem; align-items: center; justify-content: space-between; gap: 1rem; cursor: pointer; font-weight: 780; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; color: var(--primary); font-size: 1.4rem; font-weight: 500; transition: transform .2s ease; }
.faq-list details[open] summary::after { transform: rotate(45deg); }
.faq-list details p { padding: 0 2.5rem 1.4rem 0; margin: 0; color: var(--muted); }

.tool-library { padding-bottom: 8rem; }
.section-heading { display: flex; align-items: end; justify-content: space-between; margin-bottom: 1.2rem; }
.section-heading h2 { margin: .3rem 0 0; font-size: 2rem; letter-spacing: -.04em; }
.tool-count { color: var(--muted); font-size: .85rem; }
.tool-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.tool-card { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 1rem; padding: 1.25rem; border: 1px solid var(--line); border-radius: 1.15rem; background: #fff; box-shadow: var(--small-shadow); text-decoration: none; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
.tool-card:hover { border-color: #cfd2e5; box-shadow: var(--shadow); transform: translateY(-3px); }
.tool-card strong, .tool-card small { display: block; }
.tool-card small { margin-top: .2rem; color: var(--muted); }
.tool-icon { display: grid; width: 3rem; height: 3rem; place-items: center; border-radius: .85rem; color: var(--primary); background: var(--primary-soft); font-size: 1.4rem; }
.card-arrow { color: var(--primary); font-size: 1.3rem; }

.info-page {
  max-width: 50rem;
  padding-block: 4.5rem 7rem;
}
.info-page .breadcrumbs { justify-content: flex-start; margin-bottom: 2.5rem; }
.info-page h1 { margin-inline: 0; font-size: clamp(2.5rem, 7vw, 4rem); }
.info-lede { color: var(--muted); font-size: 1.15rem; }
.policy-meta { margin-bottom: .5rem; color: #85899a; font-size: .82rem; }
.info-page section { padding-top: 2rem; margin-top: 2rem; border-top: 1px solid var(--line); }
.info-page h2 { margin-bottom: .65rem; font-size: 1.45rem; letter-spacing: -.025em; }
.info-page section p { color: #555a70; }
.info-page section p:last-child { margin-bottom: 0; }
.info-page a { color: var(--primary-dark); text-underline-offset: .18em; }
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 3rem; }
.contact-grid section { padding: 1.35rem; margin: 0; border: 1px solid var(--line); border-radius: 1rem; background: #fff; box-shadow: var(--small-shadow); }
.contact-grid h2 { font-size: 1.1rem; }
.contact-link { font-weight: 750; overflow-wrap: anywhere; }

.not-found { display: grid; min-height: 36rem; padding-block: 6rem; place-content: center; text-align: center; }
.not-found h1 { max-width: 50rem; }
.not-found > p { color: var(--muted); font-size: 1.05rem; }
.not-found-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: .75rem; margin-top: 1.2rem; }

.site-footer { display: flex; justify-content: space-between; gap: 2rem; padding: 2.5rem max(1rem, calc((100% - 1120px) / 2)); border-top: 1px solid var(--line); color: var(--muted); background: #fff; font-size: .82rem; }
.footer-brand { margin-bottom: .6rem; }
.site-footer p { margin: 0; }
.footer-meta { display: grid; justify-items: end; gap: .8rem; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: .4rem 1rem; }
.footer-links a { color: #555a70; text-decoration: none; }
.footer-links a:hover { color: var(--primary-dark); text-decoration: underline; text-underline-offset: .18em; }

@media (max-width: 860px) {
  .editor { grid-template-columns: 1fr; overflow: visible; }
  .settings-panel { position: static; border-top: 1px solid var(--line); border-left: 0; }
  .queue-panel { min-height: 26rem; }
  .steps-grid { grid-template-columns: 1fr; }
  .two-column-content, .faq-section { grid-template-columns: 1fr; gap: 2rem; }
  .tool-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .site-header nav a:first-child { display: none; }
  .tool-hero { padding-top: 2.8rem; }
  .home-hero { padding-block: 6rem 3.5rem; }
  .upload-panel { min-height: 24rem; padding: 3rem 1.3rem; border-radius: 1.3rem; }
  .queue-panel, .settings-panel { padding: 1rem; }
  .queue-toolbar { align-items: flex-start; }
  .toolbar-actions { justify-content: flex-end; }
  .image-queue { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .65rem; }
  .preview-frame { height: 9.5rem; }
  .file-actions { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .icon-button { min-width: 2.4rem; min-height: 2.6rem; }
  .content-section { padding-block: 4rem; }
  .site-footer { display: grid; }
  .footer-meta { justify-items: start; }
  .footer-links { justify-content: flex-start; }
  .paper-size-dialog { width: calc(100% - 1rem); max-height: calc(100dvh - 1rem); }
  .paper-size-dialog-shell { max-height: calc(100dvh - 1rem); }
  .paper-size-dialog-heading { padding: 1rem 1rem .7rem; }
  .paper-size-search { margin: 0 1rem .8rem; }
  .paper-size-groups { padding: 0 1rem 1rem; }
  .paper-size-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .5rem; }
  .paper-size-option { min-height: 4.5rem; padding: .55rem .6rem; gap: .5rem; }
}

@media (max-width: 390px) {
  .image-queue { grid-template-columns: 1fr; }
  .preview-frame { height: 13rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .file-card:hover, .tool-card:hover, .upload-panel.is-dragover { transform: none; }
  .dropbox-import-card-one { opacity: 1; transform: translateY(4px) scale(.86); }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header, .url-dialog, .paper-size-dialog { background: #fff; backdrop-filter: none; }
  .url-dialog::backdrop, .paper-size-dialog::backdrop { backdrop-filter: none; }
}

@media (prefers-contrast: more) {
  :root { --line: #8d90a0; --muted: #414452; }
  .site-header { background: #fff; }
  .button, .file-card, .upload-panel, .margin-preview, .paper-size-trigger, .paper-size-option { border-width: 2px; }
}