:root {
  --bg: #080a09;
  --bg-2: #0c0f0d;
  --surface: #11150f;
  --surface-2: #171c14;
  --surface-3: #1e241a;
  --border: rgba(232, 255, 214, 0.10);
  --border-strong: rgba(232, 255, 214, 0.2);
  --fg: #eef4e8;
  --muted: #9aa793;
  --faint: #64705e;
  --accent: #c3ff5e;
  --accent-ink: #101505;
  --accent-dim: rgba(195, 255, 94, 0.14);
  --danger: #ff7a6e;
  --warn: #ffce5c;
  --ok: #7bffa8;
  --radius: 18px;
  --radius-sm: 11px;
  --mono: ui-monospace, "SFMono-Regular", "SF Mono", "Cascadia Code", "Roboto Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f4f6ef;
    --bg-2: #ecefe4;
    --surface: #ffffff;
    --surface-2: #f3f6ec;
    --surface-3: #e8edde;
    --border: rgba(18, 30, 12, 0.12);
    --border-strong: rgba(18, 30, 12, 0.24);
    --fg: #141a10;
    --muted: #5c6854;
    --faint: #8a9781;
    --accent: #3f7a00;
    --accent-ink: #ffffff;
    --accent-dim: rgba(63, 122, 0, 0.10);
    --danger: #c92f24;
    --warn: #9a6700;
    --ok: #147a3a;
  }
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60vw 50vw at 12% -10%, rgba(195, 255, 94, 0.07), transparent 60%),
    radial-gradient(50vw 40vw at 95% 0%, rgba(96, 255, 220, 0.045), transparent 65%),
    linear-gradient(180deg, var(--bg-2), var(--bg) 55%);
  pointer-events: none;
}

a { color: inherit; }

::selection { background: var(--accent); color: var(--accent-ink); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

button, input { font: inherit; }

[hidden] { display: none !important; }

/* ── chrome ─────────────────────────────────────────────── */

.top {
  max-width: 1080px;
  margin: 0 auto;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 650;
  letter-spacing: -0.02em;
  font-size: 18px;
}

.brand-mark {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  background: var(--accent);
  color: var(--accent-ink);
}
.brand-mark svg { width: 18px; height: 18px; }

.top-right { display: flex; align-items: center; gap: 18px; }

.ghost-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}
.ghost-link:hover { color: var(--fg); }

.net-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 6px 11px;
  border-radius: 999px;
}
.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--warn);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--warn) 18%, transparent);
}
.net-pill.ok .dot { background: var(--ok); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 18%, transparent); }
.net-pill.bad .dot { background: var(--danger); box-shadow: 0 0 0 3px color-mix(in srgb, var(--danger) 18%, transparent); }

main { max-width: 1080px; margin: 0 auto; padding: 0 24px 72px; }

/* ── home ───────────────────────────────────────────────── */

.home { animation: rise 0.5s cubic-bezier(.2,.7,.3,1) both; }

.hero { padding: 54px 0 30px; max-width: 760px; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 22px;
}
.pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  position: relative;
}
.pulse::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid var(--accent);
  animation: ping 2.4s ease-out infinite;
}

h1 {
  margin: 0 0 20px;
  font-size: clamp(44px, 8vw, 76px);
  line-height: 0.98;
  letter-spacing: -0.045em;
  font-weight: 720;
}
h1 .muted { color: var(--faint); }

.lede {
  margin: 0 0 34px;
  max-width: 590px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.55;
}

.drop {
  border: 1px dashed var(--border-strong);
  background:
    linear-gradient(180deg, rgba(255,255,255,0.025), transparent),
    var(--surface);
  border-radius: var(--radius);
  padding: 46px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color .18s, background .18s, transform .18s;
}
.drop:hover, .drop:focus-visible {
  border-color: var(--accent);
  background: var(--accent-dim);
}
.drop.drag {
  border-color: var(--accent);
  background: var(--accent-dim);
  transform: scale(1.005);
}
.drop-icon {
  width: 54px;
  height: 54px;
  margin: 0 auto 16px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--accent);
}
.drop-icon svg { width: 26px; height: 26px; }
.drop-title { font-size: 19px; font-weight: 620; letter-spacing: -0.02em; }
.drop-sub { color: var(--muted); font-size: 14px; margin-top: 5px; }

.linkish {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  font: inherit;
}

.home-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.or { color: var(--faint); font-size: 14px; }

.join { display: flex; gap: 8px; flex: 1; min-width: 280px; }
.join input {
  flex: 1;
  min-width: 0;
  height: 44px;
  padding: 0 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--fg);
  font-family: var(--mono);
  font-size: 13px;
}
.join input::placeholder { color: var(--faint); font-family: var(--sans); font-size: 14px; }
.join input:focus { border-color: var(--accent); outline: none; }

.btn {
  appearance: none;
  border: 1px solid var(--border-strong);
  background: var(--surface-2);
  color: var(--fg);
  height: 44px;
  padding: 0 18px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: -0.01em;
  transition: background .15s, border-color .15s, transform .1s, opacity .15s;
  white-space: nowrap;
}
.btn:hover { background: var(--surface-3); border-color: var(--border-strong); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .45; cursor: not-allowed; transform: none; }

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}
.btn.primary:hover { filter: brightness(1.06); background: var(--accent); }

.btn.quiet {
  background: transparent;
  border-color: var(--border);
  color: var(--muted);
}
.btn.quiet:hover { color: var(--fg); border-color: var(--border-strong); }

.hint {
  color: var(--muted);
  font-size: 13.5px;
  margin: 14px 0 0;
  min-height: 1.4em;
}
.hint.error { color: var(--danger); }

.features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 64px;
}
.feature {
  background: var(--surface);
  padding: 24px 22px 26px;
}
.feature-icon {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--accent-dim);
  color: var(--accent);
  margin-bottom: 16px;
}
.feature-icon svg { width: 21px; height: 21px; }
.feature h3 { margin: 0 0 8px; font-size: 15.5px; letter-spacing: -0.01em; }
.feature p { margin: 0; color: var(--muted); font-size: 13.5px; line-height: 1.6; }

.limits { margin-top: 64px; }
.limits h2 { font-size: 26px; letter-spacing: -0.03em; margin: 0 0 22px; }
.limits-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.limits-grid > div {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 22px 24px;
}
.limits-grid h3 {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.limits-grid ul { margin: 0; padding: 0; list-style: none; }
.limits-grid li {
  position: relative;
  padding-left: 24px;
  margin: 8px 0;
  color: var(--muted);
  font-size: 14px;
}
.limits-grid li::before {
  position: absolute;
  left: 0;
  top: 0;
  font-family: var(--mono);
}
.check li::before { content: "✓"; color: var(--ok); }
.cross li::before { content: "×"; color: var(--faint); }

/* ── transfer views ─────────────────────────────────────── */

.transfer-view { padding-top: 38px; animation: rise .45s cubic-bezier(.2,.7,.3,1) both; }

.view-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 26px;
}
.view-head .eyebrow { margin-bottom: 12px; }
.view-head h2 {
  margin: 0 0 8px;
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1.05;
  letter-spacing: -0.04em;
  font-weight: 700;
}
.sub { margin: 0; color: var(--muted); font-size: 15px; }

.share-card {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 18px;
}
.field-label {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 9px;
}
.copy-row { display: flex; gap: 9px; }
.copy-row input {
  flex: 1;
  min-width: 0;
  height: 46px;
  padding: 0 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-2);
  color: var(--fg);
  font-family: var(--mono);
  font-size: 12.5px;
}
.copy-row input:focus { outline: none; border-color: var(--accent); }

.share-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  justify-content: space-between;
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
  flex-wrap: wrap;
}
.share-meta code {
  font-family: var(--mono);
  color: var(--fg);
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 3px 7px;
  border-radius: 6px;
  font-size: 11.5px;
}

.qr-wrap {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 18px;
}
.qr {
  width: 156px;
  height: 156px;
  background: #fff;
  border-radius: 10px;
  padding: 10px;
  flex: 0 0 auto;
}
.qr svg { width: 100%; height: 100%; display: block; }

.share-status {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 20px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: var(--surface-2);
  border: 1px solid var(--border);
}
.share-status strong { display: block; font-size: 14px; }
.share-status span:not(.status-orb) { display: block; color: var(--muted); font-size: 13px; }
.status-orb {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--warn);
  flex: 0 0 auto;
  animation: breathe 2s ease-in-out infinite;
}
.share-status.ok .status-orb { background: var(--ok); animation: none; }
.share-status.bad .status-orb { background: var(--danger); animation: none; }

.panel {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 18px;
}
.panel-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 8px;
}
.panel-head h3 { margin: 0; font-size: 15px; letter-spacing: -0.01em; }
.count {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  background: var(--surface-2);
  border: 1px solid var(--border);
  padding: 2px 7px;
  border-radius: 999px;
  margin-left: 6px;
  vertical-align: 2px;
}
.muted { color: var(--muted); }

.file-list { list-style: none; margin: 0; padding: 0; }
.file-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px 0;
  border-top: 1px solid var(--border);
  font-size: 14px;
}
.file-list li:first-child { border-top: 0; }
.file-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  color: var(--muted);
  flex: 0 0 auto;
}
.file-icon svg { width: 15px; height: 15px; }
.file-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.file-size { color: var(--muted); font-family: var(--mono); font-size: 11.5px; white-space: nowrap; }
.file-state { font-family: var(--mono); font-size: 10.5px; text-transform: uppercase; letter-spacing: .06em; color: var(--faint); white-space: nowrap; }
.file-state.ok { color: var(--ok); }
.file-state.bad { color: var(--danger); }
.file-state.active { color: var(--accent); }

.progress-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}
.progress-head h3 { margin: 0 0 4px; font-size: 17px; letter-spacing: -0.02em; }
.pct {
  font-family: var(--mono);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.04em;
  color: var(--accent);
  font-variant-numeric: tabular-nums;
}

.bar {
  height: 8px;
  border-radius: 999px;
  background: var(--surface-3);
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  width: 0%;
  border-radius: inherit;
  background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 70%, #5effc0), var(--accent));
  transition: width .18s linear;
  box-shadow: 0 0 18px color-mix(in srgb, var(--accent) 40%, transparent);
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 18px;
}
.stats > div {
  border-top: 1px solid var(--border);
  padding-top: 10px;
}
.stat-label {
  display: block;
  color: var(--faint);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
  font-family: var(--mono);
  margin-bottom: 3px;
}
.stats strong {
  font-family: var(--mono);
  font-size: 13.5px;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
}

.accept-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}
.save-mode { color: var(--muted); font-size: 13px; max-width: 480px; }
.accept-actions { display: flex; gap: 9px; }

.complete-panel { border-color: color-mix(in srgb, var(--ok) 30%, var(--border)); }
.error-panel { border-color: color-mix(in srgb, var(--danger) 35%, var(--border)); }
.error-panel h3 { margin: 0 0 6px; font-size: 18px; letter-spacing: -0.02em; }
.complete-head { display: flex; align-items: center; gap: 15px; }
.complete-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: color-mix(in srgb, var(--ok) 14%, transparent);
  color: var(--ok);
  flex: 0 0 auto;
}
.complete-icon svg { width: 23px; height: 23px; }
.complete-head h3 { margin: 0 0 3px; font-size: 18px; letter-spacing: -0.02em; }
.complete-actions { display: flex; gap: 9px; flex-wrap: wrap; margin-top: 18px; }
.complete-actions a.btn { display: inline-flex; align-items: center; text-decoration: none; }

.foot {
  max-width: 1080px;
  margin: 0 auto;
  padding: 26px 24px 40px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
  color: var(--faint);
  font-size: 12.5px;
}
.foot a { color: var(--muted); }

.toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  transform: translate(-50%, 16px);
  background: var(--fg);
  color: var(--bg);
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 550;
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s, transform .2s;
  z-index: 20;
  max-width: calc(100vw - 32px);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ── animation ──────────────────────────────────────────── */

@keyframes rise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}
@keyframes ping {
  0% { transform: scale(.8); opacity: .8; }
  80%, 100% { transform: scale(1.9); opacity: 0; }
}
@keyframes breathe {
  0%, 100% { opacity: 1; }
  50% { opacity: .35; }
}

/* ── responsive ─────────────────────────────────────────── */

@media (max-width: 900px) {
  .features { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .top { padding: 16px 16px; }
  main { padding: 0 16px 48px; }
  .ghost-link { display: none; }
  .hero { padding: 34px 0 18px; }
  h1 { font-size: clamp(40px, 12vw, 56px); }
  .lede { font-size: 16px; margin-bottom: 26px; }
  .drop { padding: 34px 16px; }
  .home-actions { gap: 10px; }
  .join { min-width: 100%; order: 3; }
  .or { order: 2; }
  .features { grid-template-columns: 1fr; margin-top: 44px; }
  .limits { margin-top: 44px; }
  .limits-grid { grid-template-columns: 1fr; }
  .view-head { flex-direction: column; }
  .share-card, .panel { padding: 18px; }
  .stats { grid-template-columns: 1fr 1fr; gap: 12px; }
  .copy-row { flex-wrap: wrap; }
  .copy-row input { flex-basis: 100%; }
  .copy-row .btn { width: 100%; }
  .pct { font-size: 22px; }
  .qr-wrap { flex-direction: column; align-items: flex-start; }
  .foot { padding: 22px 16px 32px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}