:root {
  color-scheme: light dark;
  font: 16px/1.5 system-ui, sans-serif;
  --page: #f2f4ef;
  --surface: #fff;
  --text: #17231d;
  --muted: #505d53;
  --line: #758479;
  --accent: #1b634b;
  --accent-ink: #fff;
  --error: #9a272c;
}

@media (prefers-color-scheme: dark) {
  :root {
    --page: #151d19;
    --surface: #202b25;
    --text: #edf2ed;
    --muted: #b4c4b8;
    --line: #819388;
    --accent: #a7e0bd;
    --accent-ink: #102c20;
    --error: #ffb3b6;
  }
}

:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"] {
  color-scheme: dark;
  --page: #151d19;
  --surface: #202b25;
  --text: #edf2ed;
  --muted: #b4c4b8;
  --line: #819388;
  --accent: #a7e0bd;
  --accent-ink: #102c20;
  --error: #ffb3b6;
}

:root[data-theme="light"] {
  --page: #f2f4ef;
  --surface: #fff;
  --text: #17231d;
  --muted: #505d53;
  --line: #758479;
  --accent: #1b634b;
  --accent-ink: #fff;
  --error: #9a272c;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  color: var(--text);
  background: var(--page);
}

main {
  max-inline-size: 43rem;
  margin-inline: auto;
  padding: max(2rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right))
    max(2rem, env(safe-area-inset-bottom)) max(1rem, env(safe-area-inset-left));
}

header { margin-block-end: 1.75rem; }
.signature, dd { font-family: ui-monospace, Consolas, monospace; }
.signature { color: var(--muted); }
h1 {
  margin: 0.55rem 0 0.75rem;
  font-size: clamp(2.65rem, 8vw, 4.25rem);
  line-height: 1;
  letter-spacing: -0.055em;
}
header p { max-inline-size: 27rem; margin: 0; color: var(--muted); }

section {
  border: 1px solid var(--line);
  border-radius: 0.85rem;
  background: var(--surface);
}

.formats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  border-block-end: 1px solid var(--line);
}
.formats div { padding: 0.85rem 1rem; }
.formats div + div { border-inline-start: 1px solid var(--line); }
dt, footer { color: var(--muted); font-size: 0.875rem; }
dd { margin: 0.3rem 0 0; overflow-wrap: anywhere; font-size: 0.9rem; }
form { display: grid; gap: 0.75rem; padding: 1rem; }
label { font-weight: 650; }
input, button, .download { font: inherit; }
.file-actions { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.secondary {
  display: inline-flex;
  align-items: center;
  min-block-size: 2.75rem;
  padding: 0.35rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  background: transparent;
  color: var(--text);
  text-align: start;
  text-decoration: none;
  font-weight: 600;
}
.secondary:hover { text-decoration: underline; }
.secondary:active { filter: brightness(0.9); }
.account {
  padding: 0.65rem 0.8rem;
  border-radius: 0.5rem;
  background: var(--page);
  overflow-wrap: anywhere;
}
.account p { margin: 0; }
#file-origin { font-weight: 650; }
#account { margin-block-start: 0.2rem; font-size: 0.9rem; color: var(--muted); }
fieldset { min-inline-size: 0; margin: 0; padding: 0; border: 0; }
legend { padding: 0; margin-block-end: 0.4rem; font-weight: 650; }
.action-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0.45rem; }
.action-list label { position: relative; display: grid; }
.action-list input { position: absolute; opacity: 0; }
.action-list span {
  display: grid;
  min-block-size: 2.75rem;
  place-items: center;
  padding: 0.35rem 0.3rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  text-align: center;
  font-size: 0.85rem;
  cursor: pointer;
}
.action-list input:checked + span { border-color: var(--accent); background: var(--page); }
.action-list input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: 2px; }
.action-list input:disabled + span { cursor: default; }
.action-list input:not(:disabled) + span:hover { text-decoration: underline; }
.action-list input:not(:disabled) + span:active { filter: brightness(0.9); }
@media (max-width: 22.5rem) {
  .action-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .action-list label:last-child { grid-column: 1 / -1; }
}
#action-detail {
  margin: -0.25rem 0 0.35rem;
  color: var(--muted);
  font-size: 0.875rem;
}
input[type="file"] {
  display: block;
  inline-size: 100%;
  min-inline-size: 0;
  min-block-size: 3.25rem;
  border: 1px solid var(--line);
  border-radius: 0.5rem;
  color: var(--text);
  background: var(--page);
  cursor: pointer;
}
input::file-selector-button {
  min-block-size: 3.15rem;
  margin-inline-end: 0.65rem;
  padding-inline: 0.7rem;
  border: 0;
  border-inline-end: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  cursor: pointer;
}
#status {
  min-block-size: 3rem;
  margin: 0;
  color: var(--muted);
  overflow-wrap: anywhere;
}
#status[data-error] { color: var(--error); }
#status:empty { margin-block: -0.375rem; min-block-size: 0; }
button, .download {
  display: grid;
  min-block-size: 3rem;
  place-items: center;
  padding: 0.55rem 0.9rem;
  border: 1px solid transparent;
  border-radius: 0.5rem;
  background: var(--accent);
  color: var(--accent-ink);
  text-align: center;
  text-decoration: none;
  font-weight: 650;
  cursor: pointer;
}
button:disabled, select:disabled, input:disabled, input:disabled::file-selector-button { cursor: default; }
button:disabled { background: var(--page); color: var(--muted); border-color: var(--line); }
button:not(:disabled):hover, .download:hover { text-decoration: underline; }
button:not(:disabled):active, .download:active { filter: brightness(0.9); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
[hidden] { display: none !important; }
footer { margin-block-start: 0.9rem; }

@media (min-width: 36rem) {
  main { padding-block-start: max(3.25rem, env(safe-area-inset-top)); }
  form, .formats div { padding: 1.25rem 1.5rem; }
}