:root {
  --bg: #0f172a;
  --panel: #111827;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --primary: #22c55e;
  --border: #1f2937;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font: 16px/1.6 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial; }

header { padding: 32px 20px 10px; text-align: center; }
header h1 { margin: 0 0 8px; font-size: 28px; }
header p { margin: 0; color: var(--muted); }

main { max-width: 980px; margin: 0 auto; padding: 20px; }

.steps, .block { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 18px; margin-bottom: 16px; }
.steps h2 { margin: 0 0 8px; }
.steps ol { margin: 8px 0 0 22px; }
.hint { color: var(--muted); font-size: 14px; margin-top: 8px; }

.block h3 { margin: 0 0 12px; }
.inputs { display: grid; grid-template-columns: 1fr 64px 1fr; gap: 16px; align-items: start; }
.stack { display: flex; flex-direction: column; gap: 8px; }
.label { font-size: 14px; color: var(--muted); }
.divider { display: flex; align-items: center; justify-content: center; }
.inputs.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.switch { display: flex; align-items: center; gap: 8px; padding-top: 6px; }
.or { color: var(--muted); padding: 6px 10px; border-radius: 999px; background: #0b1220; border: 1px dashed var(--border); font-size: 12px; }
textarea { width: 100%; min-height: 160px; background: #0b1220; border: 1px solid var(--border); color: var(--text); border-radius: 10px; padding: 12px 14px; resize: vertical; box-shadow: inset 0 0 0 1px transparent; transition: border .15s, box-shadow .15s; }
textarea:focus { outline: none; border-color: #334155; box-shadow: 0 0 0 3px rgba(34,197,94,.15); }
input[type="file"] { display: block; padding: 10px; width: 100%; background: #0b1220; border: 1px solid var(--border); border-radius: 10px; color: var(--muted); }
input[type="text"], input[type="datetime-local"] { width: 100%; background: #0b1220; color: var(--text); border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; }
input[type="text"]:focus, input[type="datetime-local"]:focus { outline: none; border-color: #334155; box-shadow: 0 0 0 3px rgba(34,197,94,.15); }

.actions { text-align: center; margin-top: 20px; }
button { background: var(--primary); color: #052e16; border: none; border-radius: 999px; padding: 12px 18px; font-weight: 600; cursor: pointer; box-shadow: 0 8px 24px rgba(34,197,94,.15); }
button:hover { filter: brightness(1.1); }

footer { text-align: center; color: var(--muted); padding: 24px; }
footer a { color: #93c5fd; text-decoration: none; }
footer a:hover { color: #bfdbfe; text-decoration: underline; }

pre { background: #0b1220; border: 1px solid var(--border); border-radius: 8px; padding: 12px; overflow: auto; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace; }

@media (max-width: 780px) {
  .inputs { grid-template-columns: 1fr; }
  .divider { display: none; }
}