/* PDF Tools on the web.
 *
 * Layout: from 900 px a sidebar lists the tools and each tool shows its pages
 * beside a sticky options column. Narrower, an app bar (Back, title, menu)
 * replaces the sidebar, which becomes a drawer; options sit above the pages
 * and the Run button stays in a bar at the bottom of the screen. Content is
 * capped in width so very wide screens keep a readable layout.
 */

:root {
  color-scheme: light dark;
  --bg: #f4f5f8;
  --panel: #ffffff;
  --raised: #ffffff;
  --text: #1b2130;
  --muted: #5f6b80;
  --line: #dde1e8;
  --line-strong: #c6ccd6;
  --accent: #2f6fed;
  --accent-soft: color-mix(in srgb, var(--accent) 12%, transparent);
  --accent-text: #ffffff;
  --danger: #c93a3a;
  --ok: #1d8049;
  --page-shadow: 0 1px 2px rgb(0 0 0 / 0.12), 0 2px 8px rgb(0 0 0 / 0.08);
  --radius: 10px;
  --sidebar: 228px;
  --side: 340px;
  --card: 168px;
  --bar: 52px;
  --gutter: clamp(16px, 2.4vw, 36px);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 14px;
  line-height: 1.4;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171d;
    --panel: #1c2028;
    --raised: #232833;
    --text: #e7eaf0;
    --muted: #9aa3b5;
    --line: #2e3441;
    --line-strong: #3d4555;
    --accent: #5b8dff;
    --page-shadow: 0 1px 3px rgb(0 0 0 / 0.5);
  }
}

/* Thumbnails grow with the screen. */
@media (min-width: 1500px) {
  :root {
    --card: 196px;
    --side: 360px;
  }
}
@media (min-width: 2200px) {
  :root {
    --card: 236px;
    --side: 380px;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-padding-top: calc(var(--bar) + 8px);
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  background: var(--bg);
  color: var(--text);
}

button,
input,
select,
summary {
  font: inherit;
  color: inherit;
}

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

[hidden] {
  display: none !important;
}

.icon {
  width: 18px;
  height: 18px;
  flex: none;
  display: inline-block;
  background: currentColor;
  mask: var(--icon) center / contain no-repeat;
  -webkit-mask: var(--icon) center / contain no-repeat;
}

/* ── App bar (small screens) ─────────────────────────────────────────── */

#topbar {
  display: none;
}

/* ── Sidebar / drawer ────────────────────────────────────────────────── */

#sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar);
  padding: 14px 10px;
  padding-left: max(10px, env(safe-area-inset-left));
  border-right: 1px solid var(--line);
  background: var(--panel);
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow-y: auto;
  z-index: 30;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
  font-size: 16px;
  background: none;
  border: 0;
  border-radius: 8px;
  padding: 6px 8px 14px;
  cursor: pointer;
  text-align: left;
}

.brand img {
  width: 28px;
  height: 28px;
}

#nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

#nav button {
  display: flex;
  align-items: center;
  gap: 11px;
  width: 100%;
  min-height: 36px;
  padding: 7px 10px;
  border: 0;
  border-radius: 8px;
  background: none;
  text-align: left;
  cursor: pointer;
}

#nav button:hover {
  background: var(--accent-soft);
}

#nav button.active {
  background: var(--accent);
  color: var(--accent-text);
}

.install {
  margin-top: auto;
  min-height: 36px;
  padding: 8px 10px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  background: none;
  color: var(--accent);
  font-weight: 600;
  cursor: pointer;
}

.install:not([hidden]) + .local {
  margin-top: 0;
}

.local {
  margin: auto 0 0;
  color: var(--muted);
  font-size: 12px;
  padding: 10px 8px 0;
}

#scrim {
  position: fixed;
  inset: 0;
  background: rgb(0 0 0 / 0.45);
  z-index: 25;
}

/* ── Main area ───────────────────────────────────────────────────────── */

#main {
  margin-left: var(--sidebar);
  padding: 28px var(--gutter) 64px;
  min-width: 0;
}

/* Wide screens: keep lines and grids at a comfortable width. */
#main[data-view="home"] > * {
  max-width: 1180px;
  margin-inline: auto;
}

#main[data-view="tool"] > * {
  max-width: 1880px;
  margin-inline: auto;
}

.page-head {
  margin-bottom: 22px;
}

h1 {
  font-size: 24px;
  line-height: 1.2;
  margin: 0 0 4px;
  letter-spacing: -0.01em;
}

.subtitle {
  color: var(--muted);
  margin: 0;
  font-size: 15px;
}

/* Home: tool tiles. */
.home {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 14px;
}

.home button {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  text-align: left;
  cursor: pointer;
  transition:
    border-color 0.15s,
    transform 0.15s,
    box-shadow 0.15s;
}

.home button:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 14px rgb(0 0 0 / 0.08);
  transform: translateY(-1px);
}

.tile-icon {
  width: 42px;
  height: 42px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
}

.tile-icon .icon {
  width: 22px;
  height: 22px;
}

.tile-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.tile-text strong {
  font-size: 15px;
}

.desc {
  color: var(--muted);
}

/* ── Tool layout ─────────────────────────────────────────────────────── */

/* The options column runs beside the title and the pages, so it starts at
   the top and always fits the window, Run button included. */
.tool {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--side);
  grid-template-rows: auto 1fr;
  grid-template-areas:
    "head side"
    "work side";
  column-gap: 28px;
  align-items: start;
}

.tool > .page-head {
  grid-area: head;
}

.workspace {
  grid-area: work;
  min-width: 0;
}

.side {
  grid-area: side;
  position: sticky;
  top: 20px;
  max-height: calc(100vh - 40px);
  max-height: calc(100dvh - 40px);
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
  overflow: hidden;
}

.panel {
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.panel > summary {
  display: none;
}

.options {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 16px;
}

.actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px 16px 16px;
  border-top: 1px solid var(--line);
  background: var(--panel);
}

.panel[hidden] + .actions {
  border-top: 0;
}

.panel h2 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin: 4px 0 -6px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.field > span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
}

.field input[type="text"],
.field input[type="password"],
.field input[type="number"],
.field select {
  width: 100%;
  min-height: 36px;
  padding: 7px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--bg);
}

.field input[type="color"] {
  width: 56px;
  height: 34px;
  padding: 2px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--bg);
}

.field input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}

.check {
  display: flex;
  align-items: center;
  gap: 9px;
  min-height: 28px;
  cursor: pointer;
}

.check input {
  width: 17px;
  height: 17px;
  accent-color: var(--accent);
}

.segmented {
  display: flex;
  padding: 3px;
  gap: 3px;
  border-radius: 9px;
  background: var(--bg);
  border: 1px solid var(--line);
}

.segmented button {
  flex: 1;
  min-width: 0;
  min-height: 32px;
  border: 0;
  border-radius: 7px;
  padding: 5px 6px;
  background: none;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.segmented button.active {
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 550;
}

.anchors {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 5px;
  max-width: 180px;
}

.anchors button {
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--bg);
  height: 30px;
  cursor: pointer;
}

.anchors button.active {
  background: var(--accent);
  border-color: var(--accent);
}

.primary,
.secondary {
  min-height: 40px;
  padding: 9px 16px;
  border-radius: 9px;
  cursor: pointer;
  font-weight: 600;
}

.primary {
  background: var(--accent);
  color: var(--accent-text);
  border: 0;
}

.primary:hover:not(:disabled) {
  filter: brightness(1.08);
}

.primary:disabled {
  opacity: 0.45;
  cursor: default;
}

.secondary {
  background: none;
  border: 1px solid var(--line-strong);
}

.secondary:hover {
  border-color: var(--accent);
}

.problem {
  color: var(--danger);
  font-size: 13px;
  margin: 0;
}

.status {
  color: var(--muted);
  margin: 0;
}

.error {
  color: var(--danger);
  white-space: pre-wrap;
}

.results {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.results .done {
  color: var(--ok);
  font-weight: 600;
}

.results a {
  color: var(--accent);
  overflow-wrap: anywhere;
}

/* A result's name, editable before it's downloaded. */
.result-file {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 12px;
}

.result-file .name {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1 1 220px;
  min-width: 0;
}

.result-file .name input {
  flex: 1;
  min-width: 0;
}

.result-file .ext {
  color: var(--muted);
}

/* ── Drop zone and files ─────────────────────────────────────────────── */

.drop {
  border: 2px dashed var(--line-strong);
  border-radius: 14px;
  padding: clamp(36px, 8vw, 72px) 20px;
  text-align: center;
  color: var(--muted);
  cursor: pointer;
  background: var(--panel);
  transition: border-color 0.15s;
}

.drop:hover,
body.dragging .drop {
  border-color: var(--accent);
  color: var(--text);
}

.drop strong {
  display: block;
  color: var(--accent);
  font-size: 17px;
  margin-bottom: 4px;
}

.files {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  max-width: 100%;
  padding: 4px 6px 4px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  overflow-wrap: anywhere;
}

.chip .swatch,
.label .swatch {
  width: 10px;
  height: 10px;
  flex: none;
  border-radius: 3px;
}

.notice {
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--accent-soft);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.toolbar {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.toolbar button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 34px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  cursor: pointer;
}

.toolbar button:hover {
  border-color: var(--accent);
}

.toolbar .icon {
  width: 15px;
  height: 15px;
}

/* ── Page grid ───────────────────────────────────────────────────────── */

.pages {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(var(--card), 1fr));
  gap: 22px 16px;
}

.card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.thumb {
  width: 100%;
  aspect-ratio: 5 / 6;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sheet {
  position: relative;
  max-width: 100%;
  max-height: 100%;
  container-type: inline-size;
  box-shadow: var(--page-shadow);
  background: #fff;
  cursor: zoom-in;
  outline: 3px solid var(--part, transparent);
  outline-offset: 3px;
  border-radius: 2px;
}

.sheet.still {
  cursor: default;
  overflow: hidden;
}

.sheet canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.card.removed .sheet {
  opacity: 0.3;
}

.card.gray canvas {
  filter: grayscale(1);
}

.overlay {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.overlay .number {
  position: absolute;
  font-family: Helvetica, Arial, sans-serif;
  white-space: nowrap;
  line-height: 1;
}

.overlay .stamp {
  position: absolute;
  transform-origin: center;
}

.overlay .placed {
  position: absolute;
  outline: 1px dashed var(--accent);
  pointer-events: auto;
  cursor: grab;
  touch-action: none;
}

.overlay .placed img {
  display: block;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.overlay .placed button {
  position: absolute;
  top: -10px;
  right: -10px;
  width: 20px;
  height: 20px;
  padding: 0;
  border-radius: 50%;
  border: 0;
  background: var(--danger);
  color: #fff;
  font-size: 13px;
  line-height: 20px;
  cursor: pointer;
}

.card .label {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  max-width: 100%;
  font-size: 12px;
  color: var(--muted);
}

.card .label input {
  width: 16px;
  height: 16px;
  margin: 0;
  accent-color: var(--accent);
}

.card .label .name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card .controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 2px;
}

.icon-button {
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 7px;
  background: none;
  cursor: pointer;
  padding: 0;
}

.icon-button:hover:not(:disabled) {
  border-color: var(--line);
  background: var(--panel);
}

.icon-button:disabled {
  opacity: 0.3;
  cursor: default;
}

.icon-button .icon {
  width: 16px;
  height: 16px;
}

.placeholder {
  width: 76%;
  aspect-ratio: 3 / 4;
  background: color-mix(in srgb, var(--line) 60%, transparent);
  border-radius: 3px;
  animation: pulse 1.4s ease-in-out infinite;
}

@keyframes pulse {
  50% {
    opacity: 0.55;
  }
}

/* ── Signature pad ───────────────────────────────────────────────────── */

.pad {
  width: 100%;
  aspect-ratio: 2.4;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: #fff;
  touch-action: none;
  cursor: crosshair;
}

/* ── Zoom ────────────────────────────────────────────────────────────── */

#zoom {
  border: 0;
  padding: 0;
  background: none;
  max-width: 96vw;
  max-height: 96vh;
}

#zoom::backdrop {
  background: rgb(0 0 0 / 0.7);
}

#zoom canvas {
  display: block;
  max-width: 96vw;
  max-height: 92vh;
  max-height: 92dvh;
  background: #fff;
}

#zoom .close {
  position: fixed;
  top: max(12px, env(safe-area-inset-top));
  right: 16px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgb(0 0 0 / 0.5);
  color: #fff;
  font-size: 24px;
}

/* ── Small screens: app bar, drawer, options above pages ─────────────── */

@media (max-width: 899px) {
  :root {
    --card: 140px;
  }

  #topbar {
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    align-items: center;
    gap: 6px;
    height: calc(var(--bar) + env(safe-area-inset-top));
    padding: env(safe-area-inset-top) max(8px, env(safe-area-inset-right)) 0 max(8px, env(safe-area-inset-left));
    background: color-mix(in srgb, var(--panel) 92%, transparent);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
  }

  #bar-logo {
    width: 26px;
    height: 26px;
    margin-left: 8px;
  }

  #bar-title {
    flex: 1;
    min-width: 0;
    margin-left: 4px;
    font-weight: 650;
    font-size: 17px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .bar-button {
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    border: 0;
    border-radius: 10px;
    background: none;
    cursor: pointer;
  }

  .bar-button:active {
    background: var(--accent-soft);
  }

  .bar-button .icon {
    width: 22px;
    height: 22px;
  }

  #sidebar {
    width: min(300px, 84vw);
    padding-top: max(14px, env(safe-area-inset-top));
    padding-bottom: max(14px, env(safe-area-inset-bottom));
    box-shadow: 8px 0 30px rgb(0 0 0 / 0.25);
    transform: translateX(-105%);
    transition: transform 0.22s ease;
    visibility: hidden;
  }

  body.menu-open #sidebar {
    transform: none;
    visibility: visible;
  }

  body.menu-open {
    overflow: hidden;
  }

  #nav button {
    min-height: 44px;
  }

  #main {
    margin-left: 0;
    padding: 16px max(16px, env(safe-area-inset-right)) 32px max(16px, env(safe-area-inset-left));
  }

  /* The app bar already names the page; keep its one-line description. */
  .page-head h1 {
    display: none;
  }

  .page-head {
    margin-bottom: 16px;
  }

  .subtitle {
    font-size: 14px;
  }

  .home {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 10px;
  }

  .home button {
    padding: 12px 14px;
    align-items: center;
  }

  .home button:hover {
    transform: none;
  }

  .tile-icon {
    width: 40px;
    height: 40px;
  }

  /* One column: description, options, then the pages; Run stays at the bottom. */
  .tool {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
  }

  .tool > .page-head {
    margin-bottom: 0;
  }

  .workspace {
    order: 2;
  }

  .side {
    position: static;
    max-height: none;
    overflow: visible;
    border: 0;
    background: none;
  }

  .panel {
    overflow: visible;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--panel);
  }

  .panel > summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 46px;
    padding: 0 16px;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
  }

  .panel > summary::-webkit-details-marker {
    display: none;
  }

  .panel > summary::after {
    content: "";
    width: 9px;
    height: 9px;
    border: solid var(--muted);
    border-width: 0 2px 2px 0;
    transform: translateY(-2px) rotate(45deg);
    transition: transform 0.15s;
  }

  .panel[open] > summary::after {
    transform: translateY(2px) rotate(-135deg);
  }

  .panel[open] > summary {
    border-bottom: 1px solid var(--line);
  }

  .actions {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 15;
    max-height: 45vh;
    overflow-y: auto;
    padding: 12px max(16px, env(safe-area-inset-right)) max(12px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
    border-top: 1px solid var(--line);
    background: color-mix(in srgb, var(--panel) 95%, transparent);
    backdrop-filter: blur(10px);
    box-shadow: 0 -6px 20px rgb(0 0 0 / 0.12);
  }

  /* Tablets: keep fields and buttons at a comfortable width. */
  .actions > *,
  .options > * {
    width: 100%;
    max-width: 640px;
    margin-inline: auto;
  }

  body.has-actions #main {
    padding-bottom: calc(var(--actions-h, 72px) + 24px);
  }

  .files .secondary {
    min-height: 34px;
    padding: 6px 12px;
  }

  .pages {
    gap: 18px 12px;
  }

  .drop-hint {
    display: none;
  }
}

/* Touch screens: larger targets on page cards. */
@media (pointer: coarse) {
  .icon-button {
    width: 34px;
    height: 34px;
  }

  .card .label input {
    width: 20px;
    height: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
    animation: none !important;
  }
}