:root {
  --bg: #f7f7f5; --card: #ffffff; --text: #18181b; --muted: #6b6b73; --line: #e4e4e0;
  --accent: #2f6df6; --accent-text: #ffffff; --accent-soft: #e8efff; --danger: #d33a2c;
  --ok: #1f8a4c; --field: #fbfbfa; --shadow: 0 1px 2px rgba(0,0,0,.04), 0 4px 18px rgba(0,0,0,.05);
  --radius: 14px;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #151517; --card: #1e1e21; --text: #ececee; --muted: #9a9aa3; --line: #2e2e33;
  --accent: #5b8cff; --accent-text: #0d0d10; --accent-soft: #1f2a44; --danger: #ff6b5e;
  --ok: #4cc584; --field: #18181b; --shadow: none; color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #151517; --card: #1e1e21; --text: #ececee; --muted: #9a9aa3; --line: #2e2e33;
    --accent: #5b8cff; --accent-text: #0d0d10; --accent-soft: #1f2a44; --danger: #ff6b5e;
    --ok: #4cc584; --field: #18181b; --shadow: none; color-scheme: dark;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  min-height: 100vh; display: flex; flex-direction: column;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) 0 env(safe-area-inset-left);
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.6rem; line-height: 1.25; margin: 0 0 .5rem; letter-spacing: -.01em; }
h2 { font-size: 1.2rem; margin: 1.4rem 0 .5rem; }
.muted { color: var(--muted); }
.small, .small-label { font-size: .875rem; }
.small-label { display: block; color: var(--muted); margin: .9rem 0 .35rem; }

.top { display: flex; align-items: center; justify-content: space-between; max-width: 760px; width: 100%; margin: 0 auto; padding: 18px 20px 6px; }
.brand { display: flex; gap: 10px; align-items: center; color: var(--text); font-weight: 650; font-size: 1.05rem; }
.brand:hover { text-decoration: none; }
.theme-btn { background: none; border: 1px solid var(--line); color: var(--text); width: 38px; height: 38px; border-radius: 10px; cursor: pointer; display: grid; place-items: center; }
.theme-btn:hover { border-color: var(--muted); }

.wrap { max-width: 760px; width: 100%; margin: 0 auto; padding: 8px 20px 24px; flex: 1; }
.hero { padding: 22px 0 18px; }
.hero h1 { font-size: 2.1rem; }
.lead { font-size: 1.1rem; color: var(--muted); margin: 0; max-width: 34em; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; margin-bottom: 18px; }
.card.narrow { max-width: 520px; margin-left: auto; margin-right: auto; }
.card.center { text-align: center; }
.card.center .btn { margin-top: .5rem; }

.tabs { display: flex; align-items: center; gap: 6px; border-bottom: 1px solid var(--line); margin: -6px -2px 18px; padding-bottom: 10px; flex-wrap: wrap; }
.tab { background: none; border: 0; padding: 8px 14px; border-radius: 9px; font: inherit; font-weight: 600; color: var(--muted); cursor: pointer; }
.tab.active { background: var(--accent-soft); color: var(--accent); }
.limits { margin-left: auto; font-size: .85rem; color: var(--muted); white-space: nowrap; padding: 4px 10px; border: 1px solid var(--line); border-radius: 999px; }

.drop { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; text-align: center; padding: 34px 16px; border: 2px dashed var(--line); border-radius: 12px; cursor: pointer; color: var(--muted); transition: border-color .15s, background .15s; }
.drop:hover, .drop.over { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }
.drop-title { color: var(--text); font-weight: 600; }
.fileinfo { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 12px; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px; background: var(--field); }
.fi-text { display: flex; flex-direction: column; min-width: 0; }
.fi-text strong { overflow-wrap: anywhere; }

textarea, input[type=text], input[type=password], select {
  width: 100%; font: inherit; color: var(--text); background: var(--field); border: 1px solid var(--line);
  border-radius: 10px; padding: 11px 12px; outline: none; font-size: 16px;
}
textarea { resize: vertical; min-height: 180px; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 15px; line-height: 1.5; }
textarea:focus, input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.counter { text-align: right; font-size: .82rem; color: var(--muted); margin-top: 4px; }
.counter.over { color: var(--danger); }

.pwrow { margin-top: 16px; }
.pwrow > label { display: block; font-size: .9rem; margin-bottom: 6px; }
.pwbox { position: relative; }
.pwbox input { padding-right: 96px; }
.pwbox .link-btn { position: absolute; right: 10px; top: 50%; transform: translateY(-50%); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font: inherit; font-weight: 600; padding: 11px 20px; border-radius: 10px; border: 1px solid transparent; cursor: pointer; text-decoration: none; min-height: 44px; }
.btn:hover { text-decoration: none; }
.btn.primary { background: var(--accent); color: var(--accent-text); }
.btn.primary:hover { filter: brightness(1.06); }
.btn.ghost { background: transparent; border-color: var(--line); color: var(--text); }
.btn.ghost:hover { border-color: var(--muted); }
.btn.danger { background: var(--danger); color: #fff; }
.btn.small { padding: 6px 12px; min-height: 34px; font-size: .9rem; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.done { background: var(--ok); color: #fff; }
.link-btn { background: none; border: 0; color: var(--accent); font: inherit; font-size: .9rem; cursor: pointer; padding: 4px; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }

.progress { margin-top: 18px; }
.bar { height: 8px; background: var(--line); border-radius: 99px; overflow: hidden; }
.fill { height: 100%; width: 0; background: var(--accent); transition: width .2s; }
.prog-row { display: flex; justify-content: space-between; align-items: center; margin-top: 8px; font-size: .9rem; color: var(--muted); font-variant-numeric: tabular-nums; }

.error { color: var(--danger); margin: 10px 0 0; font-size: .92rem; }
.alert { background: rgba(211,58,44,.12); background: color-mix(in srgb, var(--danger) 12%, transparent); color: var(--danger); border-radius: 10px; padding: 12px 14px; margin-bottom: 16px; font-size: .95rem; }

.result h2 { margin-top: 0; }
.copyrow { display: flex; gap: 8px; }
.copyrow input { flex: 1; min-width: 0; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 14px; }
.copyrow .btn { flex-shrink: 0; }
.expiry { display: flex; gap: 8px 28px; flex-wrap: wrap; margin: 18px 0 4px; padding: 12px 14px; background: var(--field); border: 1px solid var(--line); border-radius: 10px; font-size: .95rem; }
.countdown { font-variant-numeric: tabular-nums; }
.secret { margin-top: 18px; padding-top: 4px; border-top: 1px dashed var(--line); }
.secret p { margin: 6px 0 14px; }

.file-head { display: flex; gap: 14px; align-items: center; }
.file-ico { color: var(--accent); flex-shrink: 0; }
.fh-text { min-width: 0; }
.filename { font-size: 1.3rem; margin: 0; overflow-wrap: anywhere; }
.note { white-space: pre-wrap; overflow-wrap: anywhere; word-break: break-word; background: var(--field); border: 1px solid var(--line); border-radius: 10px; padding: 14px; margin: 12px 0 0; max-height: 60vh; overflow: auto; font: 15px/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; tab-size: 4; }

.stack input, .stack select, .stack textarea { margin-bottom: 4px; }
.stack .btn { margin-top: 14px; width: 100%; }
.prose li { margin: .35rem 0; }
.prose p { margin: .6rem 0; }
.notes { padding: 0 4px; }

.foot { max-width: 760px; width: 100%; margin: 0 auto; padding: 18px 20px calc(24px + env(safe-area-inset-bottom)); border-top: 1px solid var(--line); }
.foot nav { display: flex; flex-wrap: wrap; gap: 6px 18px; font-size: .92rem; }
.foot p { font-size: .82rem; margin: 10px 0 0; }

.top-right { display: flex; align-items: center; gap: 10px; }
.top-link { font-weight: 600; font-size: .95rem; padding: 8px 12px; border-radius: 10px; }
.top-link:hover { background: var(--accent-soft); text-decoration: none; }
.acc-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; padding: 18px 0 12px; }
.acc-head p { margin: 0; overflow-wrap: anywhere; }
.acc-title { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 8px; }
.acc-title h2 { margin: 0; }
.items { list-style: none; margin: 0; padding: 0; }
.item { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 14px 0; border-top: 1px solid var(--line); }
.item:first-child { border-top: 0; }
.item.gone { opacity: .45; }
.item-main { min-width: 0; flex: 1; }
.item-title { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.item-name { overflow-wrap: anywhere; font-weight: 600; }
.item-actions { display: flex; gap: 6px; flex-shrink: 0; }
.item-actions form { margin: 0; }
.badge { font-size: .72rem; font-weight: 600; text-transform: uppercase; letter-spacing: .03em; padding: 2px 7px; border-radius: 6px; background: var(--accent-soft); color: var(--accent); }
.danger-text { color: var(--danger); }
.notice { background: var(--accent-soft); color: var(--accent); border-radius: 10px; padding: 12px 14px; margin-bottom: 16px; }
details.card > summary { cursor: pointer; list-style: revert; }
details.card[open] > summary { margin-bottom: 6px; }

@media (max-width: 560px) {
  .item { flex-direction: column; align-items: stretch; }
  .item-actions .btn, .item-actions form { flex: 1; }
  .item-actions form .btn { width: 100%; }
  .top-link { padding: 8px; }
  .hero h1 { font-size: 1.75rem; }
  .lead { font-size: 1rem; }
  .card { padding: 16px; border-radius: 12px; }
  .limits { margin-left: 0; order: 3; width: 100%; text-align: center; }
  .copyrow { flex-direction: column; }
  .actions .btn { flex: 1; }
  .drop { padding: 26px 12px; }
}