:root {
  --paper: #f3eee2;
  --paper-warm: #ebe2d1;
  --paper-deep: #ddd1bb;
  --surface: #fbf8f1;
  --surface-strong: #fffdf8;
  --ink: #20211d;
  --ink-soft: #3e4038;
  --muted: #716e64;
  --faint: #979184;
  --line: #cec4b0;
  --line-strong: #9e937f;
  --accent: #c34a2f;
  --accent-deep: #98331f;
  --accent-soft: #f0d7cc;
  --pine: #245d51;
  --pine-soft: #d9e4df;
  --gold: #a77a37;
  --danger: #a63224;
  --shadow: rgba(64, 45, 27, 0.14);
  --display: "Noto Serif CJK SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --ui: "Noto Sans CJK SC", "Source Han Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;
  --mono: "Cascadia Mono", "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--ui);
  line-height: 1.65;
  min-width: 320px;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

[hidden] {
  display: none !important;
}

::selection {
  color: var(--surface-strong);
  background: var(--accent);
}

.paper-grain {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
  opacity: 0.18;
  background:
    radial-gradient(circle at 18% 32%, rgba(58, 43, 24, 0.2) 0 0.5px, transparent 0.7px),
    radial-gradient(circle at 81% 67%, rgba(58, 43, 24, 0.16) 0 0.6px, transparent 0.8px);
  background-size: 7px 7px, 11px 11px;
  mix-blend-mode: multiply;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 15;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  min-height: 76px;
  padding: 12px clamp(22px, 5vw, 76px);
  border-bottom: 1px solid rgba(126, 111, 87, 0.34);
  background: rgba(243, 238, 226, 0.88);
  backdrop-filter: blur(18px);
}

.site-header > .version {
  justify-self: end;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  width: max-content;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 39px;
  height: 42px;
  border: 1px solid var(--ink);
  color: var(--surface-strong);
  background: var(--ink);
  font-family: var(--display);
  font-size: 21px;
  line-height: 1;
  transform: rotate(-2deg);
  box-shadow: 3px 3px 0 var(--accent);
}

.brand-mark.small {
  width: 28px;
  height: 30px;
  font-size: 15px;
  box-shadow: 2px 2px 0 var(--accent);
}

.brand-copy {
  display: grid;
  gap: 0;
}

.brand-copy strong {
  font-family: var(--display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.brand-copy small {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.13em;
}

.site-nav {
  display: flex;
  gap: 28px;
  font-size: 13px;
}

.site-nav a {
  position: relative;
  padding: 7px 0;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 2px;
  height: 1px;
  background: var(--accent);
  transition: right 180ms ease;
}

.site-nav a:hover::after {
  right: 0;
}

.header-action {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 13px;
  padding: 10px 0 9px 18px;
  border-bottom: 1px solid var(--ink);
  font-size: 13px;
  font-weight: 700;
}

.header-action span {
  color: var(--accent);
  font-size: 18px;
  transition: transform 180ms ease;
}

.header-action:hover span {
  transform: translate(2px, 2px);
}

main {
  width: min(1480px, 100%);
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(360px, 0.88fr);
  gap: clamp(40px, 8vw, 126px);
  align-items: center;
  min-height: min(760px, calc(100vh - 76px));
  padding: clamp(58px, 8vw, 112px) clamp(22px, 5vw, 76px) clamp(56px, 8vw, 100px);
}

.hero-copy > * {
  animation: rise-in 620ms cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

.hero-copy > :nth-child(2) { animation-delay: 80ms; }
.hero-copy > :nth-child(3) { animation-delay: 150ms; }
.hero-copy > :nth-child(4) { animation-delay: 220ms; }
.hero-copy > :nth-child(5) { animation-delay: 290ms; }

@keyframes rise-in {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: translateY(0); }
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 24px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow span {
  display: inline-grid;
  place-items: center;
  min-width: 28px;
  height: 21px;
  color: var(--surface-strong);
  background: var(--accent);
  font-size: 9px;
  letter-spacing: 0.04em;
}

.hero h1,
.section-heading h2,
.workbench-head h2,
.file-note h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.16;
}

.hero h1 {
  max-width: 820px;
  font-size: clamp(44px, 6.2vw, 87px);
}

.hero h1 em {
  position: relative;
  color: var(--accent);
  font-style: normal;
  white-space: nowrap;
}

.hero h1 em::after {
  content: "";
  position: absolute;
  left: 2%;
  right: 0;
  bottom: 4px;
  height: 7px;
  background: var(--accent-soft);
  z-index: -1;
  transform: skewX(-12deg);
}

.hero-lead {
  max-width: 650px;
  margin: 30px 0 0;
  color: var(--ink-soft);
  font-size: clamp(15px, 1.4vw, 18px);
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
  margin-top: 35px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 49px;
  padding: 12px 24px;
  border: 1px solid var(--ink);
  border-radius: 0;
  cursor: pointer;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.025em;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease, box-shadow 160ms ease;
}

.button:hover:not(:disabled) {
  transform: translateY(-2px);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.46;
}

.button-primary {
  color: var(--surface-strong);
  background: var(--ink);
  box-shadow: 6px 6px 0 var(--accent);
}

.button-primary:hover:not(:disabled) {
  background: var(--accent);
  box-shadow: 4px 4px 0 var(--ink);
}

.button-quiet {
  background: transparent;
}

.button-quiet:hover {
  color: var(--surface-strong);
  background: var(--pine);
}

.button-full {
  width: 100%;
}

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 50px 0 0;
}

.hero-facts div {
  min-width: 126px;
  padding: 0 24px;
  border-left: 1px solid var(--line);
}

.hero-facts div:first-child {
  padding-left: 0;
  border-left: 0;
}

.hero-facts dt {
  font-family: var(--display);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.2;
}

.hero-facts dd {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.hero-stage {
  position: relative;
  min-height: 548px;
  padding: 22px;
  border: 1px solid var(--line-strong);
  background:
    linear-gradient(135deg, rgba(36, 93, 81, 0.08), transparent 42%),
    repeating-linear-gradient(90deg, transparent 0, transparent 39px, rgba(89, 72, 49, 0.06) 39px, rgba(89, 72, 49, 0.06) 40px);
  animation: stage-in 720ms 120ms cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

.hero-stage.dragging {
  outline: 2px solid var(--accent);
  outline-offset: -8px;
}

@keyframes stage-in {
  from { opacity: 0; transform: translateY(28px) rotate(1.5deg); }
  to { opacity: 1; transform: translateY(0) rotate(0); }
}

.stage-caption,
.stage-legend {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
}

.stage-legend {
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 22px;
  justify-content: flex-start;
  flex-wrap: wrap;
}

.stage-legend span {
  padding: 5px 8px;
  border: 1px solid var(--line);
  background: rgba(251, 248, 241, 0.66);
}

.paper-stack {
  position: absolute;
  inset: 62px 40px 74px;
}

.paper {
  position: absolute;
  width: 74%;
  height: 80%;
  left: 12%;
  top: 9%;
  background: var(--surface-strong);
  border: 1px solid var(--line-strong);
  box-shadow: 20px 24px 50px var(--shadow);
}

.paper-back {
  transform: rotate(6deg) translate(18px, -8px);
  background: var(--paper-deep);
}

.paper-mid {
  transform: rotate(-4deg) translate(-13px, 7px);
  background: #f4eddc;
}

.paper-front {
  overflow: hidden;
  padding: clamp(25px, 3.5vw, 43px);
  transform: rotate(1.2deg);
}

.paper-topline {
  display: flex;
  justify-content: space-between;
  padding-bottom: 13px;
  border-bottom: 1px solid var(--ink);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
}

.paper-title {
  margin: 11% 0 0;
  font-family: var(--display);
  font-size: clamp(24px, 3.2vw, 42px);
  font-weight: 600;
  line-height: 1.3;
}

.paper-lines {
  display: grid;
  gap: 12px;
  margin-top: 12%;
}

.paper-lines span {
  display: block;
  height: 3px;
  background: var(--paper-deep);
}

.paper-lines span:nth-child(2) { width: 84%; }
.paper-lines span:nth-child(3) { width: 91%; }
.paper-lines span:nth-child(4) { width: 56%; }

.paper-stamp {
  position: absolute;
  right: 12%;
  bottom: 12%;
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  border: 2px solid var(--accent);
  color: var(--accent);
  font-family: var(--display);
  font-size: 26px;
  transform: rotate(-8deg);
  opacity: 0.72;
}

.tool-index {
  padding: clamp(70px, 8vw, 120px) clamp(22px, 5vw, 76px);
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 253, 248, 0.56), rgba(243, 238, 226, 0.18));
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(220px, 0.7fr) minmax(0, 1.3fr);
  gap: 50px;
  align-items: end;
  margin-bottom: 52px;
}

.section-heading .eyebrow {
  align-self: start;
  margin-top: 8px;
}

.section-heading h2,
.file-note h2 {
  font-size: clamp(34px, 4.3vw, 62px);
}

.tool-groups {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 16px;
}

.tool-group {
  border: 1px solid var(--line-strong);
  background: rgba(251, 248, 241, 0.7);
}

.tool-group-wide { grid-column: span 7; }
.tool-group-convert { grid-column: 1 / span 7; }
.tool-group-tall {
  grid-column: span 5;
  grid-row: span 2;
  background: var(--pine);
  color: var(--surface-strong);
}
.tool-group-watermark {
  grid-column: 1 / -1;
  background: #eee2d6;
}

.tool-group > header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  padding: 17px 20px;
  border-bottom: 1px solid var(--line);
}

.tool-group-tall > header {
  border-color: rgba(255, 255, 255, 0.22);
}

.tool-group > header span {
  font-family: var(--display);
  font-size: 19px;
  font-weight: 700;
}

.tool-group > header small {
  color: var(--muted);
  font-size: 11px;
}

.tool-group-tall > header small {
  color: rgba(255, 255, 255, 0.62);
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tool-grid-compact {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.tool-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-height: 230px;
  padding: 22px;
  border: 0;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
  overflow: hidden;
  transition: background 180ms ease, color 180ms ease;
}

.tool-card:nth-child(2n) { border-right: 0; }
.tool-card:nth-last-child(-n + 2) { border-bottom: 0; }

.tool-card::before {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  top: 0;
  height: 4px;
  background: var(--accent);
  transition: right 220ms ease;
}

.tool-card:hover {
  background: var(--surface-strong);
}

.tool-card:hover::before {
  right: 0;
}

.tool-card-featured {
  background: rgba(255, 253, 248, 0.74);
}

.tool-card-vertical {
  width: 100%;
  min-height: 422px;
  padding: clamp(26px, 3vw, 42px);
  border: 0;
  color: var(--surface-strong);
  justify-content: flex-end;
}

.tool-card-vertical::before {
  background: var(--gold);
}

.tool-card-vertical:hover {
  color: var(--ink);
  background: #e9d9b9;
}

.tool-card-vertical .tool-number,
.tool-card-vertical p {
  color: rgba(255, 255, 255, 0.66);
}

.tool-card-vertical:hover .tool-number,
.tool-card-vertical:hover p {
  color: var(--muted);
}

.tool-card-vertical .tool-mark {
  width: 88px;
  height: 88px;
  margin-bottom: auto;
  border-color: rgba(255, 255, 255, 0.36);
  font-size: 41px;
}

.tool-number {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.1em;
}

.tool-mark {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  margin-top: 18px;
  border: 1px solid var(--line-strong);
  font-family: var(--display);
  font-size: 22px;
  font-weight: 700;
}

.tool-card strong {
  margin-top: 18px;
  font-family: var(--display);
  font-size: clamp(20px, 1.8vw, 27px);
  line-height: 1.25;
}

.tool-card p {
  margin: 10px 0 20px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.75;
}

.tool-link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-top: auto;
  padding-bottom: 2px;
  border-bottom: 1px solid currentColor;
  font-size: 11px;
  font-weight: 700;
}

.tool-link i {
  color: var(--accent);
  font-style: normal;
  transition: transform 180ms ease;
}

.tool-card:hover .tool-link i {
  transform: translate(3px, -3px);
}

.tool-grid-compact .tool-card {
  min-height: 226px;
  padding: 18px;
}

.tool-grid-compact .tool-card:nth-child(2n) {
  border-right: 1px solid var(--line);
}

.tool-grid-compact .tool-card:nth-child(4n) {
  border-right: 0;
}

.workbench {
  padding: 28px clamp(22px, 4vw, 56px) 40px;
}

.workbench-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 18px;
}

.workbench-head .eyebrow {
  margin-bottom: 8px;
}

.workbench-head h2 {
  font-size: clamp(30px, 3.2vw, 42px);
}

.workbench-head > div > p:last-child {
  max-width: 700px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.service-state {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0;
  padding: 7px 10px;
  border: 1px solid var(--line);
  color: var(--muted);
  background: rgba(251, 248, 241, 0.62);
  font-family: var(--mono);
  font-size: 9px;
  white-space: nowrap;
}

.service-state span:first-child {
  width: 7px;
  height: 7px;
  background: var(--gold);
  border-radius: 50%;
}

.service-state span:first-child.ok { background: var(--pine); }
.service-state span:first-child.bad { background: var(--danger); }

.workbench-grid {
  display: grid;
  grid-template-columns: 186px minmax(0, 1fr) 344px;
  gap: 0;
  border: 1px solid var(--line-strong);
  background: rgba(251, 248, 241, 0.64);
  box-shadow: 0 10px 28px rgba(64, 45, 27, 0.06);
}

.tool-rail {
  padding: 18px 11px;
  border-right: 1px solid var(--line);
  background: #ece4d5;
}

.rail-group {
  padding: 9px 0 15px;
  border-bottom: 1px solid rgba(158, 147, 127, 0.38);
}

.rail-group:last-child {
  border-bottom: 0;
}

.rail-group p {
  margin: 0 8px 7px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.12em;
}

.rail-group button {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 8px;
  border: 0;
  border-left: 2px solid transparent;
  background: transparent;
  cursor: pointer;
  text-align: left;
  font-size: 12px;
  transition: background 150ms ease, border 150ms ease;
}

.rail-group button span {
  display: inline-grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border: 1px solid var(--line-strong);
  font-family: var(--display);
  font-size: 11px;
}

.rail-group button:hover {
  background: rgba(255, 253, 248, 0.66);
}

.rail-group button.active {
  border-left-color: var(--accent);
  color: var(--accent-deep);
  background: var(--surface-strong);
  font-weight: 700;
}

.rail-group button.active span {
  border-color: var(--accent);
  color: var(--surface-strong);
  background: var(--accent);
}

.work-canvas {
  min-width: 0;
  padding: 22px;
  border-right: 1px solid var(--line);
}

.dropzone {
  position: relative;
  display: grid;
  place-items: center;
  align-content: center;
  min-height: 324px;
  padding: 36px;
  border: 1px dashed var(--line-strong);
  background:
    linear-gradient(135deg, rgba(36, 93, 81, 0.045), transparent 45%),
    repeating-linear-gradient(0deg, transparent 0, transparent 23px, rgba(88, 73, 51, 0.045) 23px, rgba(88, 73, 51, 0.045) 24px);
  cursor: pointer;
  text-align: center;
  transition: border-color 160ms ease, background 160ms ease;
}

.dropzone:hover,
.dropzone.dragging {
  border-color: var(--accent);
  background:
    linear-gradient(135deg, rgba(195, 74, 47, 0.07), transparent 45%),
    repeating-linear-gradient(0deg, transparent 0, transparent 23px, rgba(88, 73, 51, 0.045) 23px, rgba(88, 73, 51, 0.045) 24px);
}

.dropzone-mark {
  position: relative;
  width: 71px;
  height: 82px;
  margin-bottom: 22px;
}

.dropzone-mark span {
  position: absolute;
  inset: 0;
  border: 1px solid var(--ink);
  background: var(--surface-strong);
}

.dropzone-mark span:nth-child(1) {
  transform: rotate(-7deg) translate(-8px, 2px);
}

.dropzone-mark span:nth-child(2) {
  transform: rotate(4deg) translate(7px, 0);
  background: var(--paper-deep);
}

.dropzone-mark span:nth-child(3) {
  transform: rotate(-1deg);
}

.dropzone-mark span:nth-child(3)::before,
.dropzone-mark span:nth-child(3)::after {
  content: "";
  position: absolute;
  left: 15px;
  right: 15px;
  height: 2px;
  background: var(--accent);
}

.dropzone-mark span:nth-child(3)::before { top: 29px; }
.dropzone-mark span:nth-child(3)::after { top: 40px; right: 29px; background: var(--line-strong); }

.dropzone-title {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(23px, 2.5vw, 33px);
  font-weight: 700;
}

.dropzone-help {
  margin: 7px 0 0;
  color: var(--ink-soft);
  font-size: 13px;
}

.dropzone-meta {
  margin: 18px 0 0;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.04em;
}

.file-tray,
.page-board,
.watermark-preview {
  margin-top: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.7);
}

.tray-head,
.board-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding: 13px 15px;
  border-bottom: 1px solid var(--line);
}

.tray-head strong,
.board-head strong {
  font-family: var(--display);
  font-size: 17px;
}

.mini-label {
  margin: 0 0 2px;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 8px;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.tray-actions {
  display: flex;
  gap: 14px;
}

.text-button {
  padding: 2px 0;
  border: 0;
  border-bottom: 1px solid currentColor;
  background: transparent;
  cursor: pointer;
  color: var(--ink-soft);
  font-size: 11px;
}

.text-button:hover { color: var(--accent); }
.text-button.danger:hover { color: var(--danger); }

.file-list {
  display: grid;
}

.file-row {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto auto;
  gap: 12px;
  align-items: center;
  min-height: 70px;
  padding: 10px 13px;
  border-bottom: 1px solid rgba(206, 196, 176, 0.7);
}

.file-row:last-child {
  border-bottom: 0;
}

.file-index,
.file-thumb {
  display: grid;
  place-items: center;
  width: 40px;
  height: 48px;
  border: 1px solid var(--line);
  background: var(--surface-strong);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
  overflow: hidden;
}

.file-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.file-name {
  display: block;
  overflow: hidden;
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-meta {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
}

.file-order {
  display: flex;
  gap: 4px;
}

.icon-button {
  display: inline-grid;
  place-items: center;
  width: 28px;
  height: 28px;
  padding: 0;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 12px;
}

.icon-button:hover:not(:disabled) {
  border-color: var(--ink);
  color: var(--ink);
  background: var(--surface-strong);
}

.icon-button:disabled {
  opacity: 0.28;
  cursor: default;
}

.remove-file:hover {
  border-color: var(--danger);
  color: var(--danger);
}

.tray-hint {
  margin: 0;
  padding: 9px 14px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 10px;
}

.board-head > p {
  margin: 0;
  color: var(--muted);
  font-size: 10px;
  text-align: right;
}

.page-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 11px;
  max-height: 360px;
  padding: 14px;
  overflow: auto;
}

.page-tile {
  position: relative;
  padding: 6px;
  border: 1px solid var(--line);
  background: var(--surface-strong);
  cursor: pointer;
  text-align: left;
}

.page-tile img {
  width: 100%;
  aspect-ratio: 0.72;
  object-fit: contain;
  background: #f1ede4;
}

.page-tile span {
  display: block;
  padding-top: 5px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
  text-align: center;
}

.page-tile.selected {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.page-tile.selected::after {
  content: "✓";
  position: absolute;
  top: 9px;
  right: 9px;
  display: grid;
  place-items: center;
  width: 19px;
  height: 19px;
  color: var(--surface-strong);
  background: var(--accent);
  font-size: 10px;
}

.page-tile.muted {
  opacity: 0.44;
}

.page-tile.muted::after {
  display: none;
}

.split-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px 0;
}

.split-toolbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.split-mode-group {
  display: inline-flex;
  padding: 2px;
  border: 1px solid var(--line);
  background: var(--paper-warm);
}

.split-mode-btn {
  padding: 6px 12px;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 12px;
}

.split-mode-btn:hover {
  color: var(--ink);
}

.split-mode-btn.active {
  color: var(--surface-strong);
  background: var(--accent);
  font-weight: 700;
}

.split-extract-actions {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.split-tool-btn {
  padding: 5px 8px;
  border: 0;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 12px;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.split-tool-btn:hover {
  color: var(--accent);
}

.split-auto {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
  font-size: 12px;
  user-select: none;
}

.split-auto.on {
  color: var(--ink);
}

.split-auto input[type="checkbox"] {
  width: 14px;
  height: 14px;
  margin: 0;
  accent-color: var(--accent);
}

.split-every-input {
  width: 54px;
  padding: 4px 5px;
  border: 1px solid var(--line-strong);
  background: var(--surface-strong);
  color: var(--ink);
  text-align: center;
}

.split-every-input:disabled {
  opacity: 0.5;
}

.split-page-cell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  min-width: 0;
}

.split-page-cell.cut-mode {
  grid-template-columns: minmax(0, 1fr) 26px;
  gap: 2px;
}

.split-page-cell .page-tile {
  min-width: 0;
}

.split-page-cell .page-tile.selectable {
  cursor: pointer;
}

.split-page-cell .page-tile:not(.selectable) {
  cursor: default;
}

.split-page-cell .page-tile.cut {
  border-color: var(--accent);
}

.page-placeholder {
  display: grid;
  place-items: center;
  width: 100%;
  aspect-ratio: 0.72;
  background: #f1ede4;
  color: var(--faint);
  font-family: var(--mono);
  font-size: 9px;
}

.split-cut-btn {
  position: relative;
  width: 26px;
  min-height: 72px;
  padding: 0;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: rgba(195, 74, 47, 0.55);
  cursor: pointer;
  font-size: 13px;
}

.split-cut-btn::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 5px;
  bottom: 5px;
  border-left: 2px dashed rgba(195, 74, 47, 0.42);
  transform: translateX(-50%);
}

.split-cut-btn:hover:not(:disabled) {
  color: var(--accent);
  background: rgba(195, 74, 47, 0.08);
}

.split-cut-btn.active {
  color: var(--surface-strong);
  background: var(--accent);
}

.split-cut-btn.active::before {
  border-left-color: var(--accent-deep);
}

.split-cut-btn:disabled {
  cursor: default;
}

.split-cut-spacer {
  width: 26px;
}

.split-spec-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "label input"
    ". hint"
    ". error";
  gap: 4px 10px;
  align-items: center;
  margin: 0 14px 12px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.72);
}

.split-spec-label {
  grid-area: label;
  color: var(--ink-soft);
  font-size: 12px;
  white-space: nowrap;
}

.split-spec-input {
  grid-area: input;
  width: 100%;
  min-width: 0;
  padding: 7px 10px;
  border: 1px solid var(--line-strong);
  background: var(--surface-strong);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
}

.split-spec-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(195, 74, 47, 0.14);
}

.split-spec-input.error {
  border-color: var(--danger);
}

.split-spec-hint {
  grid-area: hint;
  color: var(--faint);
  font-size: 10px;
  line-height: 1.4;
}

.split-spec-error {
  grid-area: error;
  color: var(--danger);
  font-size: 11px;
}

.split-plan {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0 14px 14px;
  color: var(--muted);
  font-size: 11px;
}

.split-plan-ranges {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 5px;
}

.split-plan-chip {
  padding: 1px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-strong);
  color: var(--ink-soft);
  font-family: var(--mono);
  font-size: 9px;
}

.preview-sheet {
  position: relative;
  width: min(100%, 390px);
  margin: 24px auto 30px;
  border: 1px solid var(--line-strong);
  background: var(--surface-strong);
  box-shadow: 9px 12px 28px var(--shadow);
  overflow: hidden;
}

.preview-sheet img {
  width: 100%;
}

.preview-watermark {
  position: absolute;
  left: 50%;
  top: 50%;
  max-width: 90%;
  color: #c34a2f;
  font-family: var(--display);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  opacity: 0.5;
  white-space: nowrap;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.settings-panel {
  align-self: start;
  min-width: 0;
  background: var(--surface);
}

.settings-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 19px 13px;
  border-bottom: 1px solid var(--line);
}

.settings-head span {
  color: var(--muted);
  font-size: 9px;
}

#options-form {
  display: grid;
  gap: 19px;
  padding: 18px 19px 22px;
}

.settings-action {
  position: sticky;
  bottom: 0;
  z-index: 2;
  display: grid;
  gap: 9px;
  padding: 15px 19px 18px;
  border-top: 1px solid var(--line);
  background: rgba(251, 248, 241, 0.94);
  backdrop-filter: blur(10px);
}

.action-note {
  margin: 0;
  color: var(--muted);
  font-size: 10px;
  text-align: center;
}

.field {
  display: grid;
  gap: 7px;
}

.field[hidden] {
  display: none;
}

.field-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}

.field-label {
  color: var(--ink-soft);
  font-size: 11px;
  font-weight: 700;
}

.field-value {
  color: var(--accent-deep);
  font-family: var(--mono);
  font-size: 9px;
}

.field-hint {
  margin: -1px 0 0;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.6;
}

.input,
.select {
  width: 100%;
  min-height: 39px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 0;
  outline: 0;
  color: var(--ink);
  background: var(--surface-strong);
  font-size: 11px;
}

.input:focus,
.select:focus {
  border-color: var(--ink);
  box-shadow: inset 0 -2px 0 var(--accent);
}

.select {
  appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--ink) 50%),
    linear-gradient(135deg, var(--ink) 50%, transparent 50%);
  background-position:
    calc(100% - 14px) 16px,
    calc(100% - 9px) 16px;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 30px;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(56px, 1fr));
  border: 1px solid var(--line);
  background: var(--surface-strong);
}

.segmented label {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 37px;
  padding: 6px 7px;
  border-right: 1px solid var(--line);
  cursor: pointer;
  color: var(--muted);
  font-size: 10px;
  text-align: center;
}

.segmented label:last-child {
  border-right: 0;
}

.segmented input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segmented input:checked + span {
  color: var(--surface-strong);
}

.segmented label:has(input:checked) {
  color: var(--surface-strong);
  background: var(--ink);
}

.range-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 54px;
  gap: 10px;
  align-items: center;
}

input[type="range"] {
  width: 100%;
  height: 4px;
  margin: 10px 0;
  appearance: none;
  background: var(--paper-deep);
  outline: 0;
}

input[type="range"]::-webkit-slider-thumb {
  width: 16px;
  height: 16px;
  appearance: none;
  border: 3px solid var(--surface-strong);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
  cursor: pointer;
}

input[type="range"]::-moz-range-thumb {
  width: 12px;
  height: 12px;
  border: 3px solid var(--surface-strong);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 1px var(--accent);
  cursor: pointer;
}

.number {
  min-height: 34px;
  padding: 5px 7px;
  border: 1px solid var(--line);
  background: var(--surface-strong);
  font-family: var(--mono);
  font-size: 10px;
  text-align: center;
}

.color-row {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 9px;
}

.color-row input[type="color"] {
  width: 42px;
  height: 38px;
  padding: 3px;
  border: 1px solid var(--line);
  background: var(--surface-strong);
  cursor: pointer;
}

.check-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.7);
}

.check-row input {
  width: 15px;
  height: 15px;
  margin: 2px 0 0;
  accent-color: var(--accent);
}

.check-copy {
  display: grid;
  gap: 2px;
}

.check-copy strong {
  font-size: 10px;
}

.check-copy small {
  color: var(--muted);
  font-size: 9px;
  line-height: 1.55;
}

.position-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  width: 142px;
  padding: 6px;
  border: 1px solid var(--line);
  background: var(--surface-strong);
}

.position-grid label {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  border: 1px solid transparent;
  cursor: pointer;
}

.position-grid input {
  position: absolute;
  opacity: 0;
}

.position-grid span {
  width: 7px;
  height: 7px;
  border: 1px solid var(--line-strong);
  background: var(--paper);
}

.position-grid label:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.position-grid label:has(input:checked) span {
  border-color: var(--accent);
  background: var(--accent);
}

.result-panel {
  margin-top: 18px;
  border: 1px solid var(--line-strong);
  background: var(--surface-strong);
  animation: result-in 260ms ease both;
}

@keyframes result-in {
  from { opacity: 0; transform: translateY(9px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 20px 13px;
}

.result-head h3 {
  margin: 0;
  font-family: var(--display);
  font-size: 23px;
}

.result-state {
  margin: 0;
  padding: 5px 9px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9px;
}

.result-state.running {
  border-color: var(--gold);
  color: var(--gold);
}

.result-state.done {
  border-color: var(--pine);
  color: var(--pine);
}

.result-state.error,
.result-state.partial {
  border-color: var(--danger);
  color: var(--danger);
}

.progress-track {
  height: 5px;
  margin: 0 20px;
  background: var(--paper-deep);
  overflow: hidden;
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--gold));
  transition: width 280ms ease;
}

.result-message {
  margin: 11px 20px 0;
  color: var(--muted);
  font-size: 11px;
}

.result-steps {
  display: grid;
  gap: 1px;
  margin: 16px 20px 0;
  border: 1px solid var(--line);
  background: var(--line);
}

.result-step {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr) auto;
  gap: 11px;
  align-items: center;
  padding: 9px 11px;
  background: var(--surface);
  font-size: 10px;
}

.result-step .step-mark {
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
}

.result-step.done .step-mark {
  border-color: var(--pine);
  color: var(--surface-strong);
  background: var(--pine);
}

.result-step.error .step-mark {
  border-color: var(--danger);
  color: var(--surface-strong);
  background: var(--danger);
}

.result-step span:last-child {
  color: var(--muted);
}

.result-outputs {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  padding: 17px 20px 20px;
}

.download-card {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  min-width: min(350px, 100%);
  padding: 10px 11px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.download-kind {
  display: grid;
  place-items: center;
  width: 32px;
  height: 38px;
  border: 1px solid var(--line-strong);
  font-family: var(--mono);
  font-size: 8px;
  text-transform: uppercase;
}

.download-card strong {
  display: block;
  overflow: hidden;
  font-size: 10px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.download-card small {
  display: block;
  margin-top: 1px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 8px;
}

.download-link {
  padding: 5px 7px;
  border: 1px solid var(--ink);
  background: transparent;
  font-size: 9px;
  font-weight: 700;
}

.download-link:hover {
  color: var(--surface-strong);
  background: var(--ink);
}

.download-all {
  border-color: var(--accent);
  color: var(--accent-deep);
}

.result-log {
  margin: 0 20px 20px;
  padding: 10px;
  border: 1px solid #d8b9af;
  color: var(--danger);
  background: #f7e7e1;
  font-size: 10px;
  white-space: pre-wrap;
}

.file-note {
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(40px, 8vw, 110px);
  padding: clamp(70px, 9vw, 126px) clamp(22px, 5vw, 76px);
  border-top: 1px solid var(--line);
  background: #e8dfcf;
}

.note-columns {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-strong);
}

.note-columns p {
  display: grid;
  grid-template-columns: 116px minmax(0, 1fr);
  gap: 20px;
  margin: 0;
  padding: 19px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 12px;
  line-height: 1.8;
}

.note-columns strong {
  color: var(--ink);
  font-family: var(--display);
  font-size: 16px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  padding: 25px clamp(22px, 5vw, 76px);
  border-top: 1px solid var(--line-strong);
  color: var(--muted);
  background: var(--paper);
  font-size: 10px;
}

.site-footer p {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
}

.version {
  font-family: var(--mono);
  font-size: 8px;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  z-index: 30;
  max-width: min(520px, calc(100vw - 32px));
  padding: 11px 16px;
  color: var(--surface-strong);
  background: var(--ink);
  box-shadow: 6px 6px 0 rgba(195, 74, 47, 0.72);
  font-size: 11px;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 12px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

.toast.error {
  background: var(--danger);
  box-shadow: 6px 6px 0 rgba(32, 33, 29, 0.7);
}

@media (max-width: 1180px) {
  .hero {
    grid-template-columns: minmax(0, 1.15fr) minmax(330px, 0.85fr);
    gap: 48px;
  }

  .tool-grid-compact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tool-grid-compact .tool-card:nth-child(2n) {
    border-right: 0;
  }

  .tool-grid-compact .tool-card:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .tool-group-tall {
    grid-column: span 5;
  }

  .workbench-grid {
    grid-template-columns: 160px minmax(0, 1fr) 316px;
  }

  .page-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 920px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .site-nav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .hero-stage {
    min-height: 460px;
    max-width: 620px;
    width: 100%;
    margin: 0 auto;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .tool-group-wide,
  .tool-group-tall,
  .tool-group-convert,
  .tool-group-watermark {
    grid-column: 1 / -1;
    grid-row: auto;
  }

  .tool-card-vertical {
    min-height: 310px;
  }

  .workbench-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .workbench-grid {
    grid-template-columns: 1fr;
  }

  .tool-rail {
    display: flex;
    gap: 10px;
    overflow-x: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .rail-group {
    display: flex;
    flex: 0 0 auto;
    gap: 2px;
    padding: 0;
    border: 0;
  }

  .rail-group p {
    display: none;
  }

  .rail-group button {
    width: auto;
    min-width: max-content;
    padding: 9px 10px;
    border-left: 0;
    border-bottom: 2px solid transparent;
  }

  .rail-group button.active {
    border-bottom-color: var(--accent);
  }

  .work-canvas {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .settings-panel {
    width: 100%;
  }

  .settings-action {
    position: sticky;
    bottom: 0;
  }

  .file-note {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

@media (max-width: 620px) {
  html {
    scroll-padding-top: 72px;
  }

  .site-header {
    min-height: 66px;
    padding: 9px 16px;
  }

  .brand-copy small {
    display: none;
  }

  .brand-mark {
    width: 32px;
    height: 35px;
    font-size: 17px;
  }

  .header-action {
    padding-left: 8px;
    font-size: 11px;
  }

  .hero {
    padding: 42px 18px 54px;
    gap: 36px;
  }

  .hero h1 {
    font-size: clamp(38px, 12vw, 55px);
  }

  .hero h1 em {
    white-space: normal;
  }

  .hero-lead {
    margin-top: 22px;
    font-size: 14px;
    line-height: 1.8;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .hero-facts {
    margin-top: 35px;
  }

  .hero-facts div {
    min-width: 0;
    flex: 1;
    padding: 0 12px;
  }

  .hero-facts dt {
    font-size: 22px;
  }

  .hero-stage {
    min-height: 390px;
    padding: 15px;
  }

  .stage-legend {
    left: 15px;
    right: 15px;
    bottom: 15px;
  }

  .paper-stack {
    inset: 55px 24px 80px;
  }

  .tool-index,
  .workbench,
  .file-note {
    padding-left: 18px;
    padding-right: 18px;
  }

  .tool-grid {
    grid-template-columns: 1fr;
  }

  .tool-card,
  .tool-card:nth-child(2n),
  .tool-grid-compact .tool-card,
  .tool-grid-compact .tool-card:nth-child(2n) {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .tool-card:last-child {
    border-bottom: 0;
  }

  .tool-grid-compact {
    grid-template-columns: 1fr;
  }

  .tool-card {
    min-height: 205px;
  }

  .tool-card-vertical {
    min-height: 280px;
  }

  .workbench-head h2 {
    font-size: 38px;
  }

  .work-canvas {
    padding: 13px;
  }

  .dropzone {
    min-height: 284px;
    padding: 24px 18px;
  }

  .dropzone-title {
    font-size: 24px;
  }

  .file-row {
    grid-template-columns: 36px minmax(0, 1fr) auto;
    gap: 9px;
    padding: 9px;
  }

  .file-row > .file-index,
  .file-row > .file-thumb {
    grid-column: 1;
    grid-row: 1 / span 2;
    width: 34px;
    height: 42px;
  }

  .file-row > .file-copy {
    grid-column: 2;
    grid-row: 1;
  }

  .file-row > .file-order {
    grid-column: 2 / span 2;
    grid-row: 2;
    justify-self: end;
  }

  .file-row > .remove-file {
    grid-column: 3;
    grid-row: 1;
  }

  .file-order {
    display: flex;
  }

  .page-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    max-height: 420px;
  }

  .board-head,
  .tray-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }

  .board-head > p {
    text-align: left;
  }

  .settings-head,
  #options-form,
  .settings-action {
    padding-left: 15px;
    padding-right: 15px;
  }

  .result-outputs {
    padding-left: 14px;
    padding-right: 14px;
  }

  .download-card {
    width: 100%;
    min-width: 0;
  }

  .note-columns p {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
    padding: 22px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}