:root {
  --bg:      #0A1224;
  --bg-card: #111A2E;
  --border:  #1F2A40;
  --text:    #ffffff;
  --muted:   #6C7A96;
  --red:     #a84444;
  --green:   #2e8a5e;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, system-ui, sans-serif;
  font-size: 14px;
  font-weight: 400;
  line-height: 1.65;
  min-height: 100vh;
}

/* ── HEADER ── */
header {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 2rem 3rem;
  border-bottom: 1px solid var(--border);
}

.brand {
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--text);
  letter-spacing: 0.01em;
}

/* ── MAIN ── */
main {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 3rem;
}

/* ── INTRO ── */
.intro {
  padding: 4.5rem 0 4rem;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
}

.intro p { line-height: 1.8; }

/* ── PIPELINE ── */
.pipeline {
  padding: 3rem 0;
  border-bottom: 1px solid var(--border);
}

.step {
  display: grid;
  grid-template-columns: 2.5rem 1fr 1fr;
  align-items: baseline;
  gap: 0 1.5rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}

.step:last-child { border-bottom: none; }

.step-num {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.7rem;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.step-title { color: var(--text); }
.step-desc  { color: var(--muted); }

/* ── FORM ── */
.form-section {
  padding: 3.5rem 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

label {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.7rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

textarea {
  width: 100%;
  min-height: 200px;
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.78rem;
  line-height: 1.6;
  padding: 1rem;
  resize: vertical;
  outline: none;
}

textarea::placeholder { color: var(--muted); }

.form-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

button {
  background: var(--text);
  color: var(--bg);
  border: none;
  padding: 0.55rem 1.35rem;
  font-family: -apple-system, system-ui, sans-serif;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: opacity 0.12s;
}

button:hover   { opacity: 0.85; }
button:active  { opacity: 0.7; }
button:disabled { opacity: 0.35; cursor: default; }

#status {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.72rem;
  color: var(--muted);
}

/* ── RESULT ── */
.result-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 1rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--muted);
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 60px;
  margin-top: 0.5rem;
}

.result-box.has-result { color: var(--text); }
.gain  { color: var(--green); }
.error { color: var(--red); }

/* ── PRICING ── */
.pricing {
  padding: 3rem 0;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
}

/* ── FOOTER ── */
footer {
  padding: 3rem;
  text-align: center;
  font-size: 0.78rem;
  color: var(--muted);
}

footer a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1px;
}

footer a:hover { color: var(--text); border-color: var(--text); }

/* ── RESPONSIVE ── */
@media (max-width: 520px) {
  header, footer { padding-left: 1.5rem; padding-right: 1.5rem; }
  main { padding-left: 1.5rem; padding-right: 1.5rem; }
  .step { grid-template-columns: 2rem 1fr; }
  .step-desc { grid-column: 2; }
}