:root {
  --bg: #0f1115;
  --card: #171a21;
  --border: #262b36;
  --text: #e6e8ec;
  --muted: #8b93a1;
  --accent: #5b9dff;
  --accent-ink: #0b1220;
  --danger: #ff6b6b;
  --ok: #4ade80;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 2rem 1rem 3rem;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

header { max-width: 980px; margin: 0 auto 2rem; text-align: center; }
h1 { margin: 0; font-size: 2.4rem; letter-spacing: -0.03em; }
.tagline { margin: 0.35rem 0 1.25rem; color: var(--muted); }

.counter {
  display: inline-flex; align-items: baseline; gap: 0.5rem;
  padding: 0.5rem 1rem; border: 1px solid var(--border);
  border-radius: 999px; background: var(--card);
}
.counter-value { font-size: 1.4rem; font-weight: 600; font-variant-numeric: tabular-nums; }
.counter-label { color: var(--muted); font-size: 0.9rem; }

main {
  max-width: 980px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem;
}
@media (max-width: 820px) { main { grid-template-columns: 1fr; } }

.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; padding: 1.25rem 1.25rem 1.5rem;
}
.card h2 { margin: 0 0 1rem; font-size: 1.05rem; text-transform: uppercase;
           letter-spacing: 0.08em; color: var(--muted); }

label { display: block; margin: 0.9rem 0 0.35rem; font-size: 0.9rem; }
label:first-of-type { margin-top: 0; }

textarea, input[type=text] {
  width: 100%; padding: 0.7rem 0.8rem; background: #0c0e13;
  border: 1px solid var(--border); border-radius: 9px; color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.9rem;
  resize: vertical;
}
textarea:focus, input:focus { outline: 2px solid var(--accent); outline-offset: -1px; }

.code-input {
  font-size: 2rem; letter-spacing: 0.6em; text-align: center;
  padding: 0.6rem 0 0.6rem 0.6em; font-variant-numeric: tabular-nums;
}

.dropzone {
  border: 1px dashed var(--border); border-radius: 9px; padding: 1.1rem;
  text-align: center; color: var(--muted); font-size: 0.9rem;
  transition: border-color .15s, background .15s;
}
.dropzone.over { border-color: var(--accent); background: rgba(91,157,255,0.07); }

button { font: inherit; cursor: pointer; border-radius: 9px; }
button.primary {
  width: 100%; margin-top: 1.1rem; padding: 0.7rem 1rem; border: none;
  background: var(--accent); color: var(--accent-ink); font-weight: 600;
}
button.primary:disabled { opacity: 0.55; cursor: progress; }
button.secondary {
  padding: 0.35rem 0.7rem; background: transparent; color: var(--text);
  border: 1px solid var(--border); font-size: 0.85rem;
}
button.link {
  background: none; border: none; color: var(--accent); padding: 0;
  text-decoration: underline; font-size: inherit;
}

.hint { color: var(--muted); font-size: 0.82rem; margin: 0.6rem 0 0; }

.filelist { list-style: none; margin: 0.6rem 0 0; padding: 0; }
.filelist li {
  display: flex; align-items: center; justify-content: space-between; gap: 0.75rem;
  padding: 0.45rem 0.6rem; border: 1px solid var(--border);
  border-radius: 8px; margin-bottom: 0.35rem; font-size: 0.87rem;
}
.filelist .size { color: var(--muted); font-variant-numeric: tabular-nums; }
.filelist a { color: var(--accent); }
.filelist .thumb { max-height: 44px; border-radius: 5px; }

.result.hidden, .hidden { display: none; }
.result { text-align: center; }
.code {
  font-size: 3.2rem; font-weight: 700; letter-spacing: 0.35em;
  padding-left: 0.35em; margin: 0.5rem 0 1rem; color: var(--ok);
  font-variant-numeric: tabular-nums;
}
.result-head {
  display: flex; align-items: center; justify-content: space-between;
  margin: 1rem 0 0.4rem; font-size: 0.85rem; color: var(--muted);
}
pre {
  margin: 0; padding: 0.8rem; background: #0c0e13; border: 1px solid var(--border);
  border-radius: 9px; text-align: left; overflow-x: auto; white-space: pre-wrap;
  word-break: break-word; font-size: 0.85rem; max-height: 340px;
}

.toast {
  position: fixed; left: 50%; bottom: 1.5rem; transform: translateX(-50%);
  padding: 0.6rem 1rem; border-radius: 9px; background: var(--card);
  border: 1px solid var(--border); font-size: 0.9rem; z-index: 10;
}
.toast.error { border-color: var(--danger); color: var(--danger); }

footer { max-width: 980px; margin: 2rem auto 0; text-align: center;
         color: var(--muted); font-size: 0.75rem; }

footer a, footer span { color: var(--muted); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
footer a:hover { color: var(--accent); }