/* PDF: a desk with sheets of paper on it. Warm grey desk, white sheets with a soft shadow and a page number,
   one brown-ink colour for the action. The sheets are the design; everything else stays quiet. */
:root { --desk: #ecebe7; --card: #ffffff; --ink: #1d1b18; --soft: #625d55; --line: #d4d1c9; --act: #7a4a1f; --on-act: #ffffff; --stop: #b3261e; --shadow: 0 1px 2px rgba(0,0,0,.18), 0 6px 16px rgba(0,0,0,.10); color-scheme: light; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --desk: #161514; --card: #24221f; --ink: #f1eee8; --soft: #a8a297; --line: #38352f; --act: #e0a56a; --on-act: #1d1206; --stop: #ff8a80; --shadow: 0 1px 2px rgba(0,0,0,.6), 0 6px 16px rgba(0,0,0,.4); color-scheme: dark; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--desk); color: var(--ink); font: 400 17px/1.5 "Helvetica Neue", Helvetica, Arial, system-ui, sans-serif; font-variant-numeric: tabular-nums; }
main { max-width: 1040px; margin: 0 auto; padding: max(20px, env(safe-area-inset-top)) 16px max(32px, env(safe-area-inset-bottom)); display: grid; gap: 18px; grid-template-columns: minmax(0, 1fr); }
a { color: inherit; }
button { font: inherit; color: inherit; cursor: pointer; }
:focus-visible, .drop:focus-within { outline: 3px solid var(--act); outline-offset: 2px; }
h1 { font-size: clamp(40px, 9vw, 64px); line-height: 1; letter-spacing: -0.03em; margin: 0 0 10px; }
p { margin: 0; }
[hidden] { display: none !important; }
.top p { color: var(--soft); max-width: 60ch; }

.drop { position: relative; display: grid; gap: 4px; place-items: center; text-align: center; padding: 44px 16px; border: 2px dashed var(--soft); border-radius: 12px; cursor: pointer; }
.drop input { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer; }
.drop b { font-size: 20px; padding: 12px 22px; border-radius: 999px; background: var(--act); color: var(--on-act); pointer-events: none; }
.drop span { color: var(--soft); font-size: 15px; pointer-events: none; }
.drop.over { background: var(--card); border-style: solid; }
.drop.small { padding: 16px; } .drop.small b { font-size: 16px; padding: 10px 18px; background: transparent; color: var(--ink); border: 1.5px solid var(--ink); } .drop.small span { display: none; }
.note { color: var(--stop); font-weight: 600; min-height: 0; }
.note:empty { display: none; }

.bar { display: flex; flex-wrap: wrap; gap: 10px 16px; align-items: center; justify-content: space-between; position: sticky; top: 0; z-index: 2; background: var(--desk); padding: 10px 0; }
.bar p { font-weight: 700; }
.row { display: flex; flex-wrap: wrap; gap: 10px; }
#save { min-height: 50px; padding: 0 24px; border: 0; border-radius: 999px; background: var(--act); color: var(--on-act); font-weight: 700; }
#save:disabled { opacity: .6; cursor: progress; }
.quiet { min-height: 50px; padding: 0 18px; border-radius: 999px; background: transparent; border: 1.5px solid var(--ink); font-weight: 600; }
.danger { border-color: var(--stop); color: var(--stop); }

.sheets { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 22px 16px; }
.sheets li { display: grid; gap: 8px; align-content: start; min-width: 0; }
/* Each preview is pinned inside a square, so a tall or wide page can never cover the buttons under it. */
.paper { aspect-ratio: 1; position: relative; }
.paper canvas, .paper img { position: absolute; inset: 0; margin: auto; max-width: 100%; max-height: 100%; background: #fff; box-shadow: var(--shadow); border-radius: 2px; display: block; }
.paper img.turn90 { transform: rotate(90deg); } .paper img.turn180 { transform: rotate(180deg); } .paper img.turn270 { transform: rotate(270deg); }
.paper.failed::after { content: "No preview"; color: var(--soft); font-size: 14px; position: absolute; inset: 0; display: grid; place-items: center; }
.from { display: flex; gap: 8px; align-items: baseline; min-width: 0; }
.from b { font-size: 20px; }
.from span { color: var(--soft); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tools { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 4px; }
.tool { height: 44px; min-width: 0; border: 1px solid var(--line); border-radius: 8px; background: var(--card); display: grid; place-items: center; padding: 0; }
.tool svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.tool:disabled { opacity: .35; cursor: default; }
@media (hover: hover) { .tool:not(:disabled):hover { border-color: var(--ink); } }
@media (max-width: 380px) { .sheets { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px 10px; } .tools { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

footer { font-size: 14px; color: var(--soft); }
footer a { display: inline-block; padding: 4px 0; }
.noscript { padding: 16px; }
.doc { max-width: 68ch; display: block; } .doc h1 { font-size: 34px; margin: 16px 0; } .doc h2 { font-size: 20px; margin: 24px 0 8px; } .doc p, .doc ul { margin: 0 0 12px; }