:root {
  color-scheme: light;
  --bg: #e7eef8;
  --paper: #ffffff;
  --ink: #12263f;
  --muted: #5c6d84;
  --line: #d3e0ee;
  --accent: #e86f1a;
  --accent-ink: #fffaf6;
  --blue: #1d5cbf;
  --blue-ink: #f5f9ff;
  --danger: #b42318;
  --hot: #fff1e4;
}

* { box-sizing: border-box; }

body {
  display: flex;
  flex-direction: column;
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top, #fff6ee, transparent 26rem),
    radial-gradient(circle at 85% 0, #d7e6f8, transparent 32rem),
    var(--bg);
  color: var(--ink);
  font: 16px/1.45 system-ui, sans-serif;
}

main {
  width: min(40rem, calc(100% - 2rem));
  margin: 3rem auto 2rem;
  flex: 1;
}

footer {
  width: min(40rem, calc(100% - 2rem));
  margin: 0 auto 1.5rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

h1 {
  margin: 0;
  min-width: 0;
  font-size: 1.55rem;
  font-weight: 650;
  letter-spacing: -0.03em;
}

.title-actions {
  display: flex;
  flex-shrink: 0;
  gap: 0.45rem;
  position: relative;
  z-index: 3;
}

.title-actions[hidden] { display: none; }

#message {
  min-height: 1.45em;
  margin: 0.35rem 0 0;
  color: var(--muted);
}

#missing p {
  color: var(--muted);
}

#board { margin-top: 1rem; }

.actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

#qr-panel {
  position: fixed;
  inset: 0;
  z-index: 2;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background: rgb(18 38 63 / 0.38);
}

#qr-panel[hidden] { display: none; }

.qr-card {
  padding: 1.25rem;
  background: var(--paper);
  border-radius: 1rem;
  box-shadow: 0 1.25rem 3rem rgb(18 38 63 / 0.22);
}

#qr-code svg {
  width: min(14rem, 100%);
  height: auto;
  display: block;
}

#qr-code rect { fill: #fff; }

#qr-code path { fill: var(--ink); }

.drop {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 8.5rem;
  padding: 1.25rem;
  text-align: center;
  color: var(--muted);
  background: var(--paper);
  border: 1.5px dashed var(--line);
  border-radius: 1rem;
  cursor: pointer;
}

.drop.hot {
  background: var(--hot);
  border-color: var(--accent);
  color: var(--ink);
}

.drop input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
}

button,
.actions a {
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  border-radius: 999px;
  padding: 0.4rem 0.75rem;
  font: inherit;
  text-decoration: none;
  cursor: pointer;
}

.actions a {
  color: var(--blue);
  border-color: #b9cff0;
}

#copy-board,
#qr-board,
#new-board {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
}

#copy-board,
#qr-board {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
}

#qr-board {
  background: var(--blue);
  color: var(--blue-ink);
  border-color: var(--blue);
}

#copy-board svg,
#qr-board svg {
  width: 1.15rem;
  height: 1.15rem;
  display: block;
}

#copy-board .icon-check { display: none; }

#copy-board.copied .icon-copy { display: none; }

#copy-board.copied .icon-check { display: block; }

#files {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
}

#files li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  padding: 0.85rem 0;
  border-top: 1px solid var(--line);
}

.name {
  margin: 0;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.meta {
  margin: 0.15rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.actions { flex-shrink: 0; }

.trash {
  display: grid;
  place-items: center;
  padding: 0.4rem 0.55rem;
  color: var(--danger);
}

.trash svg {
  width: 1.05rem;
  height: 1.05rem;
  display: block;
}

#progress,
#empty {
  color: var(--muted);
}

#progress { min-height: 1.45em; }

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

@media (max-width: 640px) {
  main { margin-top: 1.5rem; }

  h1 { font-size: 1.25rem; }

  #files li {
    flex-direction: column;
    align-items: stretch;
  }

  .actions { justify-content: flex-start; }
}