/* PromptFormr — dark marketing theme, no build step, no external assets */

:root {
  color-scheme: dark;
  --bg: #0a0e1a;
  --bg-alt: #0e1424;
  --surface: #131a2e;
  --surface-2: #182238;
  --border: #243050;
  --text: #e6eaf4;
  --text-dim: #9aa5c0;
  --accent: #4f8dff;
  --accent-2: #34d3c0;
  --grad: linear-gradient(92deg, #4f8dff 0%, #34d3c0 100%);
  --radius: 14px;
  --maxw: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}
.brand span {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
}
.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}
.nav-links a:hover { color: var(--text); }
.nav-links a.nav-cta {
  color: #fff;
  background: var(--grad);
  padding: 8px 18px;
  border-radius: 999px;
  font-weight: 600;
}
.nav-links a.nav-cta:hover { filter: brightness(1.1); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 96px 0 72px;
  text-align: center;
  background:
    radial-gradient(ellipse 60% 50% at 50% -10%, rgba(79, 141, 255, 0.18), transparent),
    radial-gradient(ellipse 40% 40% at 80% 10%, rgba(52, 211, 192, 0.10), transparent);
  overflow: hidden;
}
.eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-2);
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 6px 16px;
  border-radius: 999px;
  margin: 0 0 28px;
}
.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.08;
  margin: 0 0 22px;
}
.grad {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lede {
  max-width: 640px;
  margin: 0 auto 34px;
  font-size: 1.15rem;
  color: var(--text-dim);
}
.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

/* Buttons */
.button {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1.02rem;
  text-decoration: none;
  transition: filter 0.2s ease, transform 0.2s ease;
}
.button.primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 8px 24px rgba(79, 141, 255, 0.35);
}
.button.primary:hover { filter: brightness(1.1); transform: translateY(-2px); }
.button.ghost {
  color: var(--text);
  border: 1px solid var(--border);
  background: var(--surface);
}
.button.ghost:hover { border-color: var(--accent); }

/* Loop diagram */
.loop {
  max-width: 880px;
  margin: 0 auto;
}
.loop-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}
.loop-node {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 11px 14px;
  font-size: 0.88rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}
.loop-num {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--grad);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.loop-arrow {
  font-size: 1.4rem;
  color: var(--accent);
}
.loop-return {
  margin: 10px 40px 0;
  border: 1px dashed var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  height: 26px;
  position: relative;
}
.loop-return span {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg);
  padding: 0 14px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8rem;
  color: var(--accent-2);
  white-space: nowrap;
}

/* ---------- Sections ---------- */
.section { padding: 88px 0; }
.section.alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

.section h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 36px;
}
.kicker {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent);
  margin-right: 14px;
  vertical-align: middle;
  letter-spacing: 0.08em;
}
.muted { color: var(--text-dim); font-weight: 500; font-size: 0.6em; vertical-align: middle; }
.section-lede {
  max-width: 720px;
  font-size: 1.1rem;
  color: var(--text-dim);
  margin: -16px 0 44px;
}

/* Grids */
.grid { display: grid; gap: 22px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.card:hover { transform: translateY(-4px); border-color: var(--accent); }
.card-icon { font-size: 1.8rem; margin-bottom: 12px; }
.card h3 { font-size: 1.15rem; margin: 0 0 10px; letter-spacing: -0.01em; }
.card p { color: var(--text-dim); font-size: 0.97rem; margin: 0; }

/* Case studies */
.case-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-2);
  margin: 0 0 10px;
}
.case-flow {
  margin-top: 14px !important;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82rem !important;
  color: var(--accent) !important;
}

/* Method steps */
.step {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 22px 20px;
}
.step-num {
  position: absolute;
  top: -14px;
  left: 20px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--grad);
  color: #fff;
  font-weight: 700;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.step h4 { margin: 6px 0 8px; font-size: 1.05rem; }
.step p { color: var(--text-dim); font-size: 0.93rem; margin: 0; }

/* Why */
.why-item h4 { font-size: 1.1rem; margin: 0 0 8px; }
.why-item p { color: var(--text-dim); margin: 0; }

/* ---------- CTA band ---------- */
.cta-band {
  text-align: center;
  padding: 96px 0;
  background:
    radial-gradient(ellipse 50% 60% at 50% 100%, rgba(52, 211, 192, 0.12), transparent),
    var(--bg);
}
.cta-band h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}
.cta-band p {
  max-width: 560px;
  margin: 0 auto 30px;
  color: var(--text-dim);
  font-size: 1.08rem;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 28px 0;
  font-size: 0.9rem;
  color: var(--text-dim);
}
.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.footer a { color: var(--text); text-decoration: none; font-weight: 600; }
.footer a:hover { color: var(--accent); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .grid-3 { grid-template-columns: 1fr; }
  .loop-row { flex-direction: column; }
  .loop-arrow { transform: rotate(90deg); }
  .loop-return { display: none; }
  .loop-row::after {
    content: "↺ fixes are validated against the tests";
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: 0.8rem;
    color: var(--accent-2);
    margin-top: 6px;
  }
  .nav-links a:not(.nav-cta) { display: none; }
  .section { padding: 64px 0; }
  .hero { padding: 64px 0 48px; }
}