:root {
  --paper: #F7F3EA; --card: #FFFDF7; --sunken: #F0EBDF; --hairline: #C9BC9D; --outline: #818A7F;
  --ink: #26302A; --ink2: #4C544D; --ink3: #656D63; --moss: #3A7359; --on-moss: #FFFFFF; --clay: #A1553F; --fern: #5E9678;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --paper: #141815; --card: #1D231F; --sunken: #171C18; --hairline: #3F4941; --outline: #6E7A70;
    --ink: #E8ECE4; --ink2: #9FAA9F; --ink3: #808D82; --moss: #6BAB8B; --on-moss: #0F1A14; --clay: #CE8971; --fern: #86C2A2; }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 17px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
  "Helvetica Neue", Arial, sans-serif; }
.page { max-width: 640px; margin: 0 auto; padding: 24px 16px 48px; }
.brand { display: flex; align-items: center; gap: 8px; color: var(--moss); font-weight: 700; font-size: 18px; margin-bottom: 20px; }
.card { background: var(--card); border: 1px solid var(--hairline); border-radius: 18px; padding: 24px; }
h1 { font-size: 26px; line-height: 1.2; margin: 0 0 8px; }
.lead { color: var(--ink2); margin: 0 0 20px; }
.label { display: block; font-weight: 600; margin-bottom: 8px; }
.code { width: 100%; font: 600 32px/1.2 ui-monospace, "SF Mono", Menlo, Consolas, monospace; letter-spacing: 0.18em; text-transform: uppercase;
  text-align: center; padding: 14px 12px; border: 2px solid var(--outline); border-radius: 12px; background: var(--sunken); color: var(--ink); }
.code:focus { outline: none; border-color: var(--moss); box-shadow: 0 0 0 3px color-mix(in srgb, var(--moss) 30%, transparent); }
.code::placeholder { color: var(--ink3); opacity: 0.6; }
button, .secondary { font: inherit; font-weight: 600; border-radius: 12px; cursor: pointer; }
.primary { display: block; width: 100%; margin-top: 14px; padding: 14px; border: 0; background: var(--moss); color: var(--on-moss); }
.primary:disabled { opacity: 0.6; cursor: progress; }
.secondary { display: inline-block; padding: 10px 18px; border: 2px solid var(--moss); color: var(--moss); background: transparent; }
.secondary:focus-visible, .primary:focus-visible, .link:focus-visible, .visually-hidden:focus-visible + .secondary {
  outline: 3px solid var(--moss); outline-offset: 2px; }
.error { color: var(--clay); font-weight: 600; min-height: 1.5em; margin: 12px 0 0; }
.error:empty { min-height: 0; margin: 0; }
.drop { border: 2px dashed var(--outline); border-radius: 16px; padding: 28px 16px; text-align: center; background: var(--sunken);
  transition: border-color 0.15s, background 0.15s; }
.drop:focus { outline: none; }
.drop.over { border-color: var(--moss); background: color-mix(in srgb, var(--moss) 12%, var(--sunken)); }
.drop-icon { color: var(--moss); }
.drop-title { font-weight: 700; font-size: 19px; margin: 6px 0 0; }
.drop-or { color: var(--ink3); margin: 2px 0 10px; }
.hint { color: var(--ink3); font-size: 14px; margin: 14px 0 0; }
.visually-hidden { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0 0 0 0); border: 0; }
.list { list-style: none; margin: 16px 0 0; padding: 0; }
.item { border-top: 1px solid var(--hairline); padding: 12px 0; }
.item-row { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; }
.item-name { font-weight: 600; overflow-wrap: anywhere; }
.item-size { color: var(--ink3); font-size: 14px; white-space: nowrap; }
.item-status { font-size: 14px; color: var(--ink2); margin-top: 4px; }
.item.failed .item-status { color: var(--clay); font-weight: 600; }
.item.sent .item-status { color: var(--moss); font-weight: 600; }
progress { width: 100%; height: 8px; margin-top: 8px; appearance: none; -webkit-appearance: none; border: 0; border-radius: 4px;
  background: var(--sunken); overflow: hidden; }
progress::-webkit-progress-bar { background: var(--sunken); border-radius: 4px; }
progress::-webkit-progress-value { background: var(--fern); border-radius: 4px; }
progress::-moz-progress-bar { background: var(--fern); border-radius: 4px; }
.link { font: inherit; font-size: 14px; color: var(--moss); background: none; border: 0; padding: 0; text-decoration: underline; cursor: pointer; }
.done { display: flex; gap: 12px; align-items: flex-start; margin-top: 18px; padding: 16px; border-radius: 14px; color: var(--moss);
  background: color-mix(in srgb, var(--moss) 10%, var(--card)); }
.done[hidden] { display: none; }
.done-title { font-weight: 700; margin: 0; font-size: 19px; }
.done-text { margin: 2px 0 0; color: var(--ink2); }
.privacy { color: var(--ink3); font-size: 14px; margin-top: 20px; padding: 0 4px; }
@media (max-width: 420px) { .card { padding: 18px; } h1 { font-size: 23px; } .code { font-size: 28px; } }
@media (prefers-reduced-motion: reduce) { .drop { transition: none; } }