:root {
  --paper: #f5f1ea;
  --panel: #fcfaf6;
  --panel-muted: #f2ede5;
  --ink: #282521;
  --muted: #746e65;
  --quiet: #9f988c;
  --line: #d9d1c4;
  --line-dark: #c7bdaf;
  --clay: #c96748;
  --clay-deep: #a94d32;
  --clay-soft: rgba(201, 103, 72, .12);
  --sage: #47766d;
  --sage-deep: #315e56;
  --sage-soft: rgba(71, 118, 109, .12);
  --ok: #538166;
  --danger: #b44e3a;
  --shadow: 0 10px 28px rgba(60, 49, 35, .08);
  --ease: cubic-bezier(.32, .72, 0, 1);
}

[data-theme="dark"] {
  --paper: #191816;
  --panel: #24211d;
  --panel-muted: #2c2822;
  --ink: #f1ece2;
  --muted: #b8b0a4;
  --quiet: #81796c;
  --line: #383329;
  --line-dark: #4b4439;
  --clay: #e18b67;
  --clay-deep: #e8a07c;
  --clay-soft: rgba(225, 139, 103, .14);
  --sage: #7baca0;
  --sage-deep: #9cc8bb;
  --sage-soft: rgba(123, 172, 160, .13);
  --ok: #85b98c;
  --danger: #e28a70;
  --shadow: 0 10px 28px rgba(0, 0, 0, .24);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { min-width: 320px; margin: 0; color: var(--ink); background: var(--paper); font: 14px/1.55 Inter, "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif; }
button, input { font: inherit; }
button { cursor: pointer; }
button, input, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, input:focus-visible, summary:focus-visible { outline: 3px solid color-mix(in srgb, var(--sage) 38%, transparent); outline-offset: 3px; }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

.app-shell { width: min(1040px, calc(100% - 40px)); margin: 0 auto; padding: 18px 0 38px; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 18px; min-height: 42px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: baseline; gap: 8px; min-width: 0; color: var(--ink); text-decoration: none; }
.brand strong { font-size: 15px; font-weight: 720; }.brand small { color: var(--quiet); font-size: 11px; }
.topbar-actions { display: inline-flex; align-items: center; justify-content: flex-end; gap: 7px; flex-wrap: wrap; }
.status-chip, .theme-toggle, .service-menu summary { min-height: 30px; display: inline-flex; align-items: center; gap: 6px; padding: 4px 9px; border: 1px solid var(--line); border-radius: 6px; color: var(--ink); background: var(--panel); font-size: 12px; font-weight: 650; }
.status-chip { color: var(--sage-deep); }.status-chip i { width: 6px; height: 6px; border-radius: 50%; background: var(--ok); }
.theme-toggle:hover, .service-menu summary:hover, .service-menu[open] summary { border-color: var(--sage); color: var(--sage-deep); background: var(--sage-soft); }
.service-menu { position: relative; }.service-menu summary { list-style: none; cursor: pointer; }.service-menu summary::-webkit-details-marker { display: none; }
.service-menu nav { position: absolute; z-index: 10; top: calc(100% + 7px); right: 0; width: 228px; padding: 6px; border: 1px solid var(--line-dark); border-radius: 8px; background: var(--panel); box-shadow: var(--shadow); }
.service-menu nav a { display: grid; gap: 1px; padding: 8px 9px; border-radius: 5px; color: var(--ink); text-decoration: none; font-size: 12px; font-weight: 650; }.service-menu nav a:hover { color: var(--sage-deep); background: var(--sage-soft); }.service-menu nav small { color: var(--muted); font-size: 10px; font-weight: 500; }

.tool-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 26px 0 20px; border-bottom: 1px solid var(--line); }
.tool-head h1 { margin: 0; font-size: 22px; font-weight: 720; letter-spacing: 0; line-height: 1.2; }.tool-head p { margin: 5px 0 0; color: var(--muted); font-size: 12px; }.tool-head > span { flex: none; color: var(--sage-deep); font-size: 11px; font-weight: 650; }

.transfer-grid { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(330px, .88fr); border-bottom: 1px solid var(--line); }
.transfer-panel { min-width: 0; padding: 25px 0 30px; }.receive-panel { padding-left: 32px; border-left: 1px solid var(--line); }
.panel-heading { margin-bottom: 18px; }.panel-heading h2 { margin: 0; font-size: 17px; font-weight: 720; letter-spacing: 0; }.panel-description { margin: -2px 0 18px; color: var(--muted); font-size: 12px; }

.dropzone { width: 100%; min-height: 158px; display: grid; place-content: center; justify-items: center; gap: 5px; padding: 20px; border: 1px dashed var(--line-dark); border-radius: 8px; color: var(--ink); background: var(--panel); text-align: center; transition: border-color .2s var(--ease), background-color .2s var(--ease), transform .2s var(--ease); }
.dropzone:hover, .dropzone.is-active, .dropzone:focus { border-color: var(--sage); background: var(--sage-soft); }.dropzone.is-active { transform: scale(.995); }.dropzone b { font-size: 14px; }.dropzone > span:not(.text-button) { max-width: 310px; color: var(--muted); font-size: 12px; }.drop-symbol { color: var(--sage-deep); font-size: 22px; line-height: 1; }
.text-button, .copy-button { border: 0; border-bottom: 1px solid currentColor; border-radius: 0; padding: 1px 0; color: var(--sage-deep); background: transparent; font-size: 12px; font-weight: 700; }.text-button:hover, .copy-button:hover { color: var(--clay-deep); }
.file-summary { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 10px; margin-top: 10px; padding: 10px 11px; border: 1px solid var(--line); border-radius: 7px; background: var(--panel); }.file-summary span:nth-child(2), .receive-preview > div { min-width: 0; }.file-summary b, .file-summary small, .receive-preview b, .receive-preview small { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }.file-summary b, .receive-preview b { font-size: 13px; }.file-summary small, .receive-preview small { margin-top: 1px; color: var(--muted); font-size: 11px; }
.file-badge { min-width: 38px; padding: 3px 4px; border: 1px solid color-mix(in srgb, var(--clay) 45%, var(--line)); border-radius: 4px; color: var(--clay-deep); background: var(--clay-soft); font-size: 9px; font-weight: 700; line-height: 1.1; text-align: center; overflow: hidden; }.icon-button { width: 26px; height: 26px; border: 1px solid var(--line); border-radius: 5px; color: var(--muted); background: transparent; font-size: 20px; line-height: 1; }.icon-button:hover { border-color: var(--danger); color: var(--danger); }

.control-group { margin: 19px 0 0; padding: 0; border: 0; }.control-group legend, .receive-form label { margin-bottom: 8px; color: var(--muted); font-size: 11px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; }
.expiry-options { display: flex; gap: 6px; flex-wrap: wrap; }.expiry-options label { position: relative; }.expiry-options input { position: absolute; opacity: 0; pointer-events: none; }.expiry-options span { display: block; min-width: 60px; padding: 6px 9px; border: 1px solid var(--line); border-radius: 6px; color: var(--muted); background: transparent; font-size: 12px; font-weight: 650; text-align: center; transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease); }.expiry-options input:checked + span { border-color: var(--sage); color: var(--sage-deep); background: var(--sage-soft); }.expiry-options input:focus-visible + span { outline: 3px solid color-mix(in srgb, var(--sage) 38%, transparent); outline-offset: 2px; }
.toggle-row { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 9px; margin-top: 17px; cursor: pointer; }.toggle-row input { position: absolute; opacity: 0; }.switch { position: relative; width: 35px; height: 20px; border-radius: 999px; background: var(--line-dark); transition: background-color .2s var(--ease); }.switch::after { content: ""; position: absolute; top: 3px; left: 3px; width: 14px; height: 14px; border-radius: 50%; background: var(--panel); box-shadow: 0 1px 3px rgba(0,0,0,.18); transition: transform .2s var(--ease); }.toggle-row input:checked + .switch { background: var(--sage); }.toggle-row input:checked + .switch::after { transform: translateX(15px); }.toggle-row b, .toggle-row small { display: block; }.toggle-row b { font-size: 12px; }.toggle-row small { color: var(--muted); font-size: 10.5px; }
.form-error { min-height: 18px; margin: 12px 0 0; color: var(--danger); font-size: 12px; }.primary-button, .secondary-button { min-height: 38px; border-radius: 6px; padding: 0 14px; font-size: 13px; font-weight: 700; transition: transform .2s var(--ease), box-shadow .2s var(--ease), background-color .2s var(--ease), border-color .2s var(--ease); }.primary-button { border: 1px solid var(--clay); color: #fffaf6; background: var(--clay); box-shadow: 0 4px 11px rgba(169, 77, 50, .14); }.primary-button:hover { transform: translateY(-1px); background: var(--clay-deep); box-shadow: 0 7px 15px rgba(169, 77, 50, .2); }.primary-button:disabled { cursor: not-allowed; opacity: .48; transform: none; box-shadow: none; }.secondary-button { border: 1px solid var(--sage); color: var(--sage-deep); background: var(--panel); }.secondary-button:hover { background: var(--sage-soft); }.send-panel .primary-button { width: 100%; margin-top: 3px; }
.result-panel { margin-top: 17px; padding: 14px; border: 1px solid color-mix(in srgb, var(--sage) 48%, var(--line)); border-radius: 8px; background: var(--sage-soft); }.result-title { margin: 0 0 8px; color: var(--sage-deep); font-size: 12px; font-weight: 700; }.code-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 8px 0; border-top: 1px solid color-mix(in srgb, var(--sage) 30%, transparent); border-bottom: 1px solid color-mix(in srgb, var(--sage) 30%, transparent); }.code-row code { min-width: 0; overflow: hidden; text-overflow: ellipsis; color: var(--ink); font: 700 13px/1.2 ui-monospace, SFMono-Regular, Menlo, monospace; letter-spacing: .05em; }.result-note { margin: 8px 0 0; color: var(--muted); font-size: 10.5px; }

.receive-form { display: grid; gap: 8px; }.receive-form label { margin: 0; }.receive-form input { width: 100%; min-height: 43px; padding: 0 12px; border: 1px solid var(--line-dark); border-radius: 6px; color: var(--ink); background: var(--panel); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; letter-spacing: .04em; text-transform: uppercase; }.receive-form input::placeholder { color: var(--quiet); font-size: 11px; }.receive-form input:focus { border-color: var(--sage); outline: none; }.receive-form .form-error { margin: -2px 0 0; }.receive-form .secondary-button { justify-self: start; margin-top: 2px; }
.receive-preview { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 10px; margin-top: 20px; padding-top: 14px; border-top: 1px solid var(--line); }.receive-preview .primary-button { grid-column: 1 / -1; width: 100%; margin-top: 3px; }

@media (max-width: 760px) { .app-shell { width: min(100% - 24px, 1040px); padding-top: 12px; }.topbar { align-items: flex-start; padding-bottom: 12px; }.topbar-actions { max-width: 190px; gap: 5px; }.status-chip { display: none; }.service-menu nav { width: min(228px, calc(100vw - 24px)); }.tool-head { align-items: flex-start; padding: 20px 0 16px; }.tool-head > span { margin-top: 3px; text-align: right; }.transfer-grid { grid-template-columns: 1fr; }.transfer-panel { padding: 23px 0 26px; }.receive-panel { padding-left: 0; border-top: 1px solid var(--line); border-left: 0; } }
@media (max-width: 430px) { .topbar-actions { max-width: 165px; }.theme-toggle, .service-menu summary { padding-inline: 7px; }.tool-head { display: block; }.tool-head > span { display: block; margin-top: 7px; text-align: left; }.expiry-options { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); }.expiry-options span { min-width: 0; padding-inline: 4px; }.dropzone { min-height: 148px; } }