/* Quantum Forms — product page styles, all scoped under .qf-shell. */

.qf-shell {
  --qf-bg:         oklch(0.19 0.02 275);
  --qf-card:       oklch(0.13 0.01 274);
  --qf-card-2:     oklch(0.165 0.018 275);
  --qf-card-deep:  oklch(0.10 0.02 280);
  --qf-line:       rgba(180, 160, 240, 0.10);
  --qf-line-2:     rgba(180, 160, 240, 0.18);
  --qf-line-3:     rgba(180, 160, 240, 0.28);

  --qf-fg:         oklch(0.985 0 0);
  --qf-fg-dim:     oklch(0.78 0.012 275);
  --qf-fg-faint:   oklch(0.55 0.015 275);
  --qf-fg-quiet:   oklch(0.42 0.012 275);

  --qf-blue:       oklch(0.62 0.21 264);
  --qf-blue-deep:  oklch(0.49 0.24 264);
  --qf-blue-soft:  rgba(82, 130, 255, 0.18);
  --qf-blue-line:  rgba(82, 130, 255, 0.38);

  --qf-emerald:      oklch(0.70 0.17 162);
  --qf-emerald-2:    oklch(0.78 0.15 162);
  --qf-emerald-soft: rgba(45, 196, 145, 0.14);
  --qf-emerald-line: rgba(45, 196, 145, 0.34);

  --qf-amber:        oklch(0.78 0.16 78);
  --qf-amber-2:      oklch(0.84 0.13 82);
  --qf-amber-soft:   rgba(240, 180, 70, 0.14);
  --qf-amber-line:   rgba(240, 180, 70, 0.36);

  --qf-crimson:      oklch(0.65 0.25 16);
  --qf-crimson-2:    oklch(0.74 0.18 16);
  --qf-crimson-soft: rgba(255, 80, 90, 0.12);
  --qf-crimson-line: rgba(255, 80, 90, 0.34);

  --qf-magenta:      oklch(0.66 0.24 320);
  --qf-magenta-2:    oklch(0.76 0.18 320);
  --qf-magenta-soft: rgba(220, 110, 240, 0.14);
  --qf-magenta-line: rgba(220, 110, 240, 0.34);

  --qf-grad-cta:     linear-gradient(135deg, oklch(0.49 0.24 264) 0%, oklch(0.62 0.27 290) 100%);
  --qf-grad-text:    linear-gradient(95deg, oklch(0.85 0.11 220) 0%, oklch(0.92 0.06 200) 60%, oklch(0.92 0.04 180) 100%);
  --qf-grad-emerald: linear-gradient(135deg, oklch(0.78 0.15 162), oklch(0.62 0.19 162));
  --qf-grad-amber:   linear-gradient(135deg, oklch(0.84 0.13 82), oklch(0.66 0.20 70));
  --qf-grad-crimson: linear-gradient(135deg, oklch(0.74 0.18 16), oklch(0.55 0.25 16));
  --qf-grad-magenta: linear-gradient(135deg, oklch(0.76 0.18 320), oklch(0.55 0.25 304));

  --qf-glow-blue:    0 0 32px rgba(82, 130, 255, 0.40);
  --qf-glow-amber:   0 0 32px rgba(240, 180, 70, 0.30);

  --qf-font:         "Geist", "Inter", system-ui, -apple-system, sans-serif;
  --qf-mono:         "JetBrains Mono", "Geist Mono", ui-monospace, monospace;
  --qf-serif:        "Fraunces", "Times New Roman", Georgia, serif;

  background: var(--qf-bg);
  color: var(--qf-fg);
  font-family: var(--qf-font);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.qf-page { background: oklch(0.19 0.02 275); }

.qf-shell ::selection { background: rgba(82, 130, 255, 0.4); color: white; }
.qf-shell a { color: inherit; transition: color .15s ease; }
.qf-shell button { font-family: inherit; }

/* ── Atoms ──────────────────────────────────────────────────── */
.qf-container { max-width: 1280px; margin: 0 auto; padding: 0 56px; }

.qf-mono {
  font-family: var(--qf-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--qf-fg-faint);
}
.qf-mono--blue    { color: var(--qf-blue); }
.qf-mono--emerald { color: var(--qf-emerald-2); }
.qf-mono--amber   { color: var(--qf-amber-2); }
.qf-mono--crimson { color: var(--qf-crimson-2); }
.qf-mono--magenta { color: var(--qf-magenta-2); }
.qf-mono--dim     { color: var(--qf-fg-dim); }
.qf-mono--faint   { color: var(--qf-fg-faint); }
.qf-mono--quiet   { color: var(--qf-fg-quiet); }
.qf-mono--xs      { font-size: 9px; letter-spacing: 0.12em; }
.qf-mono--sm      { font-size: 10px; letter-spacing: 0.06em; }

.qf-pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: var(--qf-mono); font-size: 11px;
  letter-spacing: 0.02em;
  padding: 4px 9px; border-radius: 999px;
}
.qf-pill::before {
  content: ""; width: 5px; height: 5px; border-radius: 999px;
}
.qf-pill--emerald { color: var(--qf-emerald-2); background: var(--qf-emerald-soft); border: 1px solid var(--qf-emerald-line); }
.qf-pill--emerald::before { background: var(--qf-grad-emerald); }
.qf-pill--amber   { color: var(--qf-amber-2);   background: var(--qf-amber-soft);   border: 1px solid var(--qf-amber-line); }
.qf-pill--amber::before   { background: var(--qf-grad-amber); }
.qf-pill--crimson { color: var(--qf-crimson-2); background: var(--qf-crimson-soft); border: 1px solid var(--qf-crimson-line); }
.qf-pill--crimson::before { background: var(--qf-grad-crimson); }
.qf-pill--magenta { color: var(--qf-magenta-2); background: var(--qf-magenta-soft); border: 1px solid var(--qf-magenta-line); }
.qf-pill--magenta::before { background: var(--qf-grad-magenta); }
.qf-pill--ghost {
  letter-spacing: 0.04em;
  color: var(--qf-fg-dim);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--qf-line-2);
}
.qf-pill--ghost::before { display: none; }

.qf-grad-text {
  background-image: var(--qf-grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-style: italic;
  display: inline-block;
  padding-right: 0.08em;
}

.qf-section-eyebrow {
  display: flex; align-items: center; gap: 14px; margin-bottom: 28px;
}
.qf-section-eyebrow__rule {
  width: 22px; height: 1px;
  background: var(--qf-blue); opacity: 0.6;
}
.qf-section-eyebrow__rule--amber   { background: var(--qf-amber-2); }
.qf-section-eyebrow__rule--magenta { background: var(--qf-magenta-2); }

.qf-display {
  font-family: var(--qf-font); font-weight: 600;
  color: var(--qf-fg); margin: 0;
  text-wrap: balance;
}
.qf-display--xxl { font-size: 72px; line-height: 1.02; letter-spacing: -0.035em; }
.qf-display--xl  { font-size: 64px; line-height: 1.02; letter-spacing: -0.035em; }
.qf-display--lg  { font-size: 48px; line-height: 1.05; letter-spacing: -0.03em; }
.qf-display--md  { font-size: 30px; line-height: 1.2;  letter-spacing: -0.02em; }
.qf-display--sm  { font-size: 22px; line-height: 1.2;  letter-spacing: -0.015em; }

.qf-body {
  font-family: var(--qf-font); font-size: 16px; line-height: 1.6;
  color: var(--qf-fg-dim); margin: 0;
  text-wrap: pretty;
}
.qf-body--sm { font-size: 13px; line-height: 1.55; }

/* ── Buttons ────────────────────────────────────────────────── */
.qf-btn {
  font-family: var(--qf-font); font-weight: 500;
  cursor: pointer;
  display: inline-flex; align-items: center; gap: 10px;
  border-radius: 999px;
  text-decoration: none;
}
.qf-btn--primary {
  color: white;
  background: var(--qf-grad-cta);
  background-size: 200% 100%; background-position: 0% 50%;
  border: none;
  padding: 14px 24px; font-size: 15px;
  box-shadow: var(--qf-glow-blue);
  transition: background-position .4s ease;
}
.qf-btn--primary:hover { background-position: 100% 50%; }
.qf-btn--ghost {
  color: var(--qf-fg);
  background: transparent;
  border: 1px solid var(--qf-line-3);
  padding: 14px 22px; font-size: 15px;
}
.qf-btn--lg { padding: 16px 28px; font-size: 16px; }
.qf-btn--lg.qf-btn--ghost { padding: 16px 26px; }

/* ── Hero ───────────────────────────────────────────────────── */
.qf-hero {
  position: relative;
  min-height: 940px;
  padding: 120px 0 80px;
  background: var(--qf-bg);
  overflow: hidden;
  border-bottom: 1px solid var(--qf-line);
}
.qf-hero__backdrop {
  position: absolute; inset: 0; overflow: hidden; pointer-events: none;
}
.qf-hero__glow-blue {
  position: absolute; left: -10%; top: -20%; width: 70%; height: 110%;
  background: radial-gradient(closest-side, rgba(82, 130, 255, 0.22), transparent 70%);
  filter: blur(8px);
  animation: qfDrift 18s ease-in-out infinite alternate;
}
.qf-hero__glow-amber {
  position: absolute; right: -10%; top: 20%; width: 60%; height: 90%;
  background: radial-gradient(closest-side, rgba(240, 180, 70, 0.10), transparent 70%);
  filter: blur(8px);
  animation: qfDrift2 22s ease-in-out infinite alternate;
}
.qf-hero__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(180, 160, 240, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(180, 160, 240, 0.05) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse at 50% 30%, black 0%, transparent 70%);
  mask-image: radial-gradient(ellipse at 50% 30%, black 0%, transparent 70%);
  opacity: 0.7;
}
@keyframes qfDrift {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, 30px) scale(1.06); }
}
@keyframes qfDrift2 {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(-30px, -20px) scale(1.05); }
}

.qf-hero__content { position: relative; z-index: 2; }
.qf-hero__center { max-width: 1180px; margin: 40px auto 0; text-align: center; }

.qf-eyebrow-tag {
  display: inline-flex; align-items: center; gap: 10px;
  margin-bottom: 28px;
  padding: 6px 14px; border-radius: 999px;
  border: 1px solid var(--qf-line-2);
  background: rgba(255, 255, 255, 0.02);
}
.qf-eyebrow-tag__dot {
  width: 6px; height: 6px; border-radius: 999px;
  background: var(--qf-emerald);
  box-shadow: 0 0 10px rgba(45, 196, 145, 0.7);
}

.qf-lede {
  font-family: var(--qf-font); font-size: 20px; line-height: 1.5;
  color: var(--qf-fg-dim); max-width: 820px; margin: 28px auto 0;
  text-wrap: pretty;
}
.qf-hero__ctas {
  display: flex; gap: 14px; justify-content: center;
  margin-top: 40px; flex-wrap: wrap;
}

.qf-hero__diagram-wrap {
  max-width: 1180px; margin: 72px auto 0; position: relative;
}
.qf-hero__diagram-floor {
  position: absolute; left: 10%; right: 10%; bottom: -40px; height: 140px;
  background: radial-gradient(closest-side, rgba(82, 130, 255, 0.36), transparent 70%);
  filter: blur(20px); pointer-events: none;
}

/* ── Hero diagram (form + JsonLogic) ────────────────────────── */
.qf-diagram {
  position: relative; border-radius: 14px; overflow: hidden;
  background: var(--qf-card);
  border: 1px solid var(--qf-line-2);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.45);
}
.qf-diagram__bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 18px; border-bottom: 1px solid var(--qf-line);
  background: rgba(255, 255, 255, 0.02);
  gap: 12px; flex-wrap: wrap;
}
.qf-diagram__bar-left { display: flex; align-items: center; gap: 10px; }
.qf-diagram__bar-right { display: flex; gap: 8px; flex-wrap: wrap; }

.qf-diagram__body {
  display: grid; grid-template-columns: 1.05fr 0.95fr;
  min-height: 440px;
}
.qf-diagram__col {
  position: relative; padding: 28px 30px 30px;
  text-align: left;
}
.qf-diagram__col--form {
  border-right: 1px solid var(--qf-line);
  background: linear-gradient(180deg, rgba(82, 130, 255, 0.06), transparent 60%);
}
.qf-diagram__col--logic {
  background: linear-gradient(180deg, rgba(240, 180, 70, 0.04), transparent 60%);
}
.qf-diagram__col-head {
  display: flex; justify-content: space-between; align-items: center; margin-bottom: 18px;
}
.qf-diagram__progress {
  height: 3px; border-radius: 999px; background: rgba(180, 160, 240, 0.10);
  margin-bottom: 22px; position: relative; overflow: hidden;
}
.qf-diagram__progress::after {
  content: ""; position: absolute; inset: 0; width: 70%;
  background: var(--qf-grad-cta); border-radius: 999px;
}

.qf-row {
  margin-bottom: 12px;
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid var(--qf-line-2);
  background: rgba(255, 255, 255, 0.015);
}
.qf-row--revealed {
  border: 1px solid var(--qf-amber-line);
  background: rgba(240, 180, 70, 0.05);
  box-shadow: var(--qf-glow-amber);
}
.qf-row--skipped {
  border: 1px dashed rgba(255, 80, 90, 0.20);
  background: transparent;
  opacity: 0.55;
}
.qf-row__head {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 8px; gap: 8px;
}
.qf-row--bare .qf-row__head { margin-bottom: 0; }
.qf-row__label {
  font-family: var(--qf-font); font-size: 12.5px; font-weight: 500;
  color: var(--qf-fg);
  display: flex; align-items: center; gap: 6px;
}
.qf-row__req { color: var(--qf-emerald-2); font-size: 12px; }
.qf-row__value {
  font-family: var(--qf-font); font-size: 13.5px;
  color: var(--qf-fg);
  border-bottom: 1px solid var(--qf-emerald-2);
  padding-bottom: 6px;
}
.qf-row__value--placeholder {
  font-family: var(--qf-mono); color: var(--qf-fg-faint);
  letter-spacing: 0.02em;
  border-bottom-color: var(--qf-amber-2);
}
.qf-row__hint {
  font-family: var(--qf-mono); font-size: 10px; color: var(--qf-emerald-2);
  margin-top: 6px; letter-spacing: 0.06em; text-transform: uppercase;
}

.qf-codeblock {
  background: var(--qf-card-deep);
  border: 1px solid var(--qf-line-2);
  border-radius: 8px;
  padding: 14px 16px; position: relative;
  font-family: var(--qf-mono); font-size: 12.5px; line-height: 1.65;
  color: oklch(0.92 0.04 200);
}
.qf-codeblock__corner {
  position: absolute; top: 10px; right: 10px;
  font-family: var(--qf-mono); font-size: 9px; letter-spacing: 0.12em;
  color: var(--qf-fg-faint);
}
.qf-code-faint { color: var(--qf-fg-faint); }
.qf-code-key   { color: oklch(0.85 0.11 220); }
.qf-code-str   { color: var(--qf-emerald-2); }
.qf-code-amber { color: var(--qf-amber-2); }
.qf-code-indent-1 { padding-left: 14px; }
.qf-code-indent-2 { padding-left: 28px; }

.qf-diagram__same {
  display: block; width: 100%; height: 70px; margin-top: 4px;
}
.qf-evals {
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px;
}
.qf-eval {
  border-radius: 8px; padding: 12px 14px;
  background: var(--qf-card-deep);
  border: 1px solid var(--qf-emerald-line);
}
.qf-eval__head {
  display: flex; justify-content: space-between; align-items: center; margin-bottom: 4px;
}
.qf-eval__lib {
  font-family: var(--qf-mono); font-size: 11px; color: oklch(0.85 0.11 220);
  margin-bottom: 6px; letter-spacing: 0.02em;
}
.qf-eval__result {
  font-family: var(--qf-font); font-size: 12.5px; color: var(--qf-fg);
}
.qf-diagram__guarantee {
  margin-top: 18px; padding: 12px 14px; border-radius: 8px;
  border: 1px dashed var(--qf-emerald-line);
  background: rgba(45, 196, 145, 0.06);
  font-family: var(--qf-font); font-size: 12.5px; line-height: 1.5;
  color: var(--qf-fg-dim);
}
.qf-diagram__guarantee strong {
  color: var(--qf-emerald-2); font-weight: 600;
}

/* ── Problem strip ──────────────────────────────────────────── */
.qf-problem {
  padding: 64px 0; position: relative; overflow: hidden;
  background: linear-gradient(180deg, var(--qf-bg) 0%, oklch(0.16 0.02 285) 100%);
  border-top: 1px solid var(--qf-line);
  border-bottom: 1px solid var(--qf-line);
}
.qf-problem__wash {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 80% 50%, rgba(255, 80, 90, 0.14), transparent 60%);
  pointer-events: none;
}
.qf-problem__inner {
  position: relative;
  display: grid; grid-template-columns: 180px 1fr; gap: 36px; align-items: center;
}
.qf-problem__label { display: flex; flex-direction: column; gap: 6px; }
.qf-problem__statement {
  font-family: var(--qf-font); font-weight: 500;
  font-size: 30px; line-height: 1.3; letter-spacing: -0.02em;
  color: var(--qf-fg); text-wrap: balance;
}
.qf-problem__statement .dim { color: var(--qf-fg-dim); }
.qf-problem__statement .red { color: var(--qf-crimson-2); }

/* ── Section frame ──────────────────────────────────────────── */
.qf-section {
  padding: 120px 0; background: var(--qf-bg); position: relative;
}
.qf-section--card {
  background: var(--qf-card);
  border-top: 1px solid var(--qf-line);
  border-bottom: 1px solid var(--qf-line);
  overflow: hidden;
}
.qf-twocol {
  display: grid; grid-template-columns: 1.1fr 1fr;
  gap: 60px; align-items: flex-end; margin-bottom: 56px;
}
.qf-twocol h2 { margin: 0; }
.qf-twocol p  { margin: 0; }
.qf-twocol .dim { color: var(--qf-fg-dim); }

/* ── Pillars (1 big + 4 mini) ───────────────────────────────── */
.qf-pillars {
  display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 1px;
  background: var(--qf-line);
  border: 1px solid var(--qf-line);
  border-radius: 12px; overflow: hidden;
}
.qf-pillar {
  background: var(--qf-card);
  padding: 28px 28px 30px;
  display: flex; flex-direction: column; gap: 14px;
  position: relative; overflow: hidden;
}
.qf-pillar--big {
  grid-row: span 2;
  background: var(--qf-card-2);
  padding: 36px 34px 36px;
  gap: 24px;
}
.qf-pillar--big::before {
  content: ""; position: absolute; top: -120px; left: -120px;
  width: 360px; height: 360px; pointer-events: none;
  background: radial-gradient(closest-side, rgba(82, 130, 255, 0.20), transparent 70%);
}
.qf-pillar__head {
  display: flex; justify-content: space-between; align-items: center;
  position: relative;
}
.qf-pillar h3 {
  font-family: var(--qf-font); font-weight: 600; font-size: 20px;
  line-height: 1.2; letter-spacing: -0.02em; color: var(--qf-fg);
  margin: 0; text-wrap: balance; position: relative;
}
.qf-pillar--big h3 { font-size: 30px; line-height: 1.15; letter-spacing: -0.025em; }
.qf-pillar p {
  font-family: var(--qf-font); font-size: 13.5px; line-height: 1.55;
  color: var(--qf-fg-dim); margin: 0; text-wrap: pretty;
  position: relative;
}
.qf-pillar--big p { font-size: 15px; line-height: 1.6; }
.qf-pillar__receipt {
  margin-top: auto; display: flex; flex-direction: column; gap: 8px;
  padding: 18px;
  border-radius: 10px;
  background: var(--qf-card-deep);
  border: 1px solid var(--qf-line-2);
  position: relative;
}
.qf-pillar__receipt-row {
  display: flex; align-items: center; gap: 10px;
}
.qf-pillar__receipt-row span:first-child {
  font-family: var(--qf-mono); font-size: 9px; color: var(--qf-fg-faint);
  letter-spacing: 0.08em; text-transform: uppercase; width: 70px;
}
.qf-pillar__bar {
  height: 8px; border-radius: 999px;
  background: linear-gradient(90deg, var(--qf-blue), transparent);
}
.qf-pillar__receipt-foot {
  margin-top: 6px;
  font-family: var(--qf-mono); font-size: 10px;
  color: var(--qf-fg-faint); letter-spacing: 0.06em; text-transform: uppercase;
}

/* ── Logic wedge ────────────────────────────────────────────── */
.qf-wedge { position: relative; }
.qf-wedge__wash {
  position: absolute; top: 30%; left: 50%; width: 900px; height: 480px;
  transform: translateX(-50%);
  background: radial-gradient(closest-side, rgba(82, 130, 255, 0.16), transparent 70%);
  filter: blur(20px); pointer-events: none;
}
.qf-wedge__grid {
  display: grid; grid-template-columns: 1.3fr 1fr; gap: 24px;
  align-items: stretch; position: relative;
}
.qf-wedge__panel {
  background: var(--qf-card-2); border-radius: 12px;
  border: 1px solid var(--qf-line-2); padding: 28px 28px 30px;
}
.qf-wedge__panel h3 {
  font-family: var(--qf-font); font-weight: 600; font-size: 22px;
  color: var(--qf-fg); letter-spacing: -0.015em;
  margin: 8px 0 22px;
}
.qf-actions {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--qf-line); border: 1px solid var(--qf-line);
  border-radius: 10px; overflow: hidden; margin-bottom: 18px;
}
.qf-action {
  background: var(--qf-card-deep);
  padding: 14px 14px 16px;
  display: flex; flex-direction: column; gap: 6px;
}
.qf-action span:first-child {
  font-family: var(--qf-mono); font-size: 11px; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--qf-emerald-2);
}
.qf-action span:last-child {
  font-family: var(--qf-font); font-size: 12px; line-height: 1.4;
  color: var(--qf-fg-dim);
}
.qf-wedge__targets {
  display: flex; gap: 10px; flex-wrap: wrap;
  font-family: var(--qf-mono); font-size: 11px; color: var(--qf-fg-faint);
  letter-spacing: 0.06em; text-transform: uppercase;
}
.qf-wedge__targets b { color: var(--qf-fg); font-weight: 400; }
.qf-wedge__targets em { color: var(--qf-fg-quiet); font-style: normal; }

.qf-wedge__refs {
  background: var(--qf-card-deep); border-radius: 12px;
  border: 1px solid var(--qf-line-2);
  padding: 24px 24px 26px;
  display: flex; flex-direction: column; gap: 18px;
  position: relative; overflow: hidden;
}
.qf-wedge__refs::before {
  content: ""; position: absolute; top: -80px; right: -80px;
  width: 240px; height: 240px; pointer-events: none;
  background: radial-gradient(closest-side, rgba(45, 196, 145, 0.20), transparent 70%);
}
.qf-wedge__refs-code {
  font-family: var(--qf-mono); font-size: 11.5px; line-height: 1.8;
  color: oklch(0.85 0.11 220); position: relative;
}
.qf-wedge__refs p {
  font-family: var(--qf-font); font-size: 13px; line-height: 1.55;
  color: var(--qf-fg-dim); margin: 0;
}

/* ── Question types grid ────────────────────────────────────── */
.qf-qtypes {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--qf-line); border: 1px solid var(--qf-line);
  border-radius: 12px; overflow: hidden;
}
.qf-qtype {
  background: var(--qf-card);
  padding: 22px 22px 24px;
  display: flex; flex-direction: column; gap: 12px; min-height: 152px;
}
.qf-qtype__icon {
  width: 32px; height: 32px; border-radius: 8px;
  background: rgba(82, 130, 255, 0.08);
  border: 1px solid var(--qf-blue-line);
  display: inline-flex; align-items: center; justify-content: center;
  color: oklch(0.85 0.11 220);
}
.qf-qtype__name {
  font-family: var(--qf-mono); font-weight: 500; font-size: 13px;
  color: var(--qf-fg); letter-spacing: 0.02em;
}
.qf-qtype__note {
  font-family: var(--qf-font); font-size: 12.5px; line-height: 1.5;
  color: var(--qf-fg-dim); margin: 0;
}

.qf-more {
  margin-top: 16px; padding: 20px 24px;
  background: var(--qf-card-2); border-radius: 12px;
  border: 1px solid var(--qf-line-2);
  display: grid; grid-template-columns: auto 1fr auto; gap: 24px;
  align-items: center;
}
.qf-more__icon {
  width: 32px; height: 32px; border-radius: 8px;
  background: rgba(45, 196, 145, 0.08);
  border: 1px solid var(--qf-emerald-line);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--qf-emerald-2);
}
.qf-more__chips {
  display: flex; flex-wrap: wrap; gap: 6px; align-items: center;
}
.qf-more__chip {
  font-family: var(--qf-mono); font-size: 11.5px;
  color: var(--qf-fg-dim); letter-spacing: 0.02em;
  padding: 2px 8px; border-radius: 4px;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--qf-line);
}
.qf-more__cta {
  font-family: var(--qf-mono); font-size: 11px; color: var(--qf-blue);
  text-decoration: none; letter-spacing: 0.06em; text-transform: uppercase;
  white-space: nowrap;
}

.qf-extras {
  margin-top: 28px;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
.qf-extra {
  background: var(--qf-card); border-radius: 12px;
  border: 1px solid var(--qf-line-2);
  padding: 22px 22px 24px;
  display: flex; flex-direction: column; gap: 12px;
}
.qf-extra h4 {
  font-family: var(--qf-font); font-weight: 600; font-size: 17px;
  color: var(--qf-fg); letter-spacing: -0.01em;
  margin: 0; text-wrap: balance;
}
.qf-extra p {
  font-family: var(--qf-font); font-size: 13px; line-height: 1.55;
  color: var(--qf-fg-dim); margin: 0; text-wrap: pretty;
}

/* ── AI Agent stations ──────────────────────────────────────── */
.qf-agent { position: relative; }
.qf-agent__wash {
  position: absolute; top: 20%; right: -15%; width: 720px; height: 480px;
  background: radial-gradient(closest-side, rgba(240, 180, 70, 0.18), transparent 70%);
  filter: blur(20px); pointer-events: none;
}
.qf-stations {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr auto 1fr auto 1fr;
  gap: 14px; align-items: stretch;
}
.qf-station {
  border-radius: 12px;
  padding: 20px 22px 22px;
  display: flex; flex-direction: column; gap: 12px;
  min-height: 230px;
  background: var(--qf-card-deep);
}
.qf-station--amber {
  border: 1px solid var(--qf-amber-line);
  box-shadow: 0 0 28px rgba(240, 180, 70, 0.08);
}
.qf-station--emerald {
  border: 1px solid var(--qf-emerald-line);
  box-shadow: 0 0 28px rgba(45, 196, 145, 0.08);
}
.qf-station__head {
  display: flex; justify-content: space-between; align-items: center;
}
.qf-station__title {
  font-family: var(--qf-font); font-weight: 600; font-size: 17px;
  color: var(--qf-fg); letter-spacing: -0.01em;
}
.qf-station__body {
  margin-top: 4px;
  font-family: var(--qf-font); font-size: 13px; line-height: 1.5;
  color: var(--qf-fg-dim);
  flex: 1;
}
.qf-station__body--mono {
  font-family: var(--qf-mono); font-size: 12px;
  background: rgba(0, 0, 0, 0.25);
  padding: 10px 12px; border-radius: 6px;
  border: 1px solid var(--qf-line);
}
.qf-station__schema {
  font-family: var(--qf-mono); font-size: 11.5px; line-height: 1.7;
  color: oklch(0.92 0.04 200);
}
.qf-station__preview {
  display: flex; flex-direction: column; gap: 7px;
}
.qf-station__preview-row {
  display: flex; align-items: center; gap: 8px;
}
.qf-station__preview-row span:first-child {
  height: 6px; border-radius: 999px;
}
.qf-station__preview-row span:last-child {
  font-family: var(--qf-mono); font-size: 9px; color: var(--qf-fg-faint); white-space: nowrap;
}
.qf-station__preview-row--em span:first-child { background: linear-gradient(90deg, var(--qf-emerald), transparent); }
.qf-station__preview-row--am span:first-child { background: linear-gradient(90deg, var(--qf-amber), transparent); }

.qf-arrow {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  min-width: 64px; gap: 6px; padding-top: 30px;
}
.qf-agent__notes {
  margin-top: 28px; display: flex; gap: 22px; flex-wrap: wrap;
  font-family: var(--qf-mono); font-size: 11px;
  color: var(--qf-fg-faint); letter-spacing: 0.06em; text-transform: uppercase;
}

/* ── Distribution ───────────────────────────────────────────── */
.qf-dist {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--qf-line);
  border: 1px solid var(--qf-line);
  border-radius: 12px; overflow: hidden;
}
.qf-dist__cell {
  background: var(--qf-card);
  padding: 28px 26px 30px;
  display: flex; flex-direction: column; gap: 18px;
  position: relative; overflow: hidden;
}
.qf-dist__cell--feature {
  background: var(--qf-card-2);
}
.qf-dist__cell--feature::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: var(--qf-grad-magenta);
}
.qf-dist__head {
  display: flex; justify-content: space-between; align-items: center;
}
.qf-dist__mock {
  border-radius: 10px; background: var(--qf-card-deep);
  border: 1px solid var(--qf-line-2);
  padding: 14px 16px;
  display: flex; flex-direction: column; gap: 8px;
  min-height: 110px;
}
.qf-dist__mock-bar {
  display: flex; align-items: center; gap: 6px;
}
.qf-dist__mock-bar span:nth-child(1) { width: 7px; height: 7px; border-radius: 999px; background: rgba(255, 80, 90, 0.55); }
.qf-dist__mock-bar span:nth-child(2) { width: 7px; height: 7px; border-radius: 999px; background: rgba(255, 200, 90, 0.55); }
.qf-dist__mock-bar span:nth-child(3) { width: 7px; height: 7px; border-radius: 999px; background: rgba(45, 196, 145, 0.6); }
.qf-dist__mock-addr {
  margin-left: 6px;
  font-family: var(--qf-mono); font-size: 10px; color: var(--qf-fg-faint);
}
.qf-dist__mock-code {
  font-family: var(--qf-mono); font-size: 12px;
  color: oklch(0.92 0.04 200); white-space: pre;
  padding-top: 4px;
}
.qf-dist__mock-key { color: oklch(0.85 0.11 220); }
.qf-dist__mock-val { color: var(--qf-magenta-2); }
.qf-dist__mock-fields {
  margin-top: 4px; display: flex; flex-direction: column; gap: 5px;
}
.qf-dist__mock-fields span:nth-child(1) { height: 4px; width: 80%; background: var(--qf-blue-soft); border-radius: 999px; }
.qf-dist__mock-fields span:nth-child(2) { height: 4px; width: 54%; background: rgba(255, 255, 255, 0.06); border-radius: 999px; }
.qf-dist__mock-fields span:nth-child(3) { height: 4px; width: 70%; background: rgba(255, 255, 255, 0.06); border-radius: 999px; }
.qf-dist__cell h3 {
  font-family: var(--qf-font); font-weight: 600; font-size: 19px;
  color: var(--qf-fg); letter-spacing: -0.015em;
  margin: 0 0 8px; text-wrap: balance;
}
.qf-dist__cell p {
  font-family: var(--qf-font); font-size: 13.5px; line-height: 1.55;
  color: var(--qf-fg-dim); margin: 0; text-wrap: pretty;
}
.qf-dist__cell p .mono { font-family: var(--qf-mono); color: var(--qf-fg); }

.qf-substrip {
  margin-top: 16px;
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: var(--qf-line); border: 1px solid var(--qf-line);
  border-radius: 12px; overflow: hidden;
}
.qf-substrip__cell {
  background: var(--qf-card); padding: 20px 22px 22px;
  display: flex; flex-direction: column; gap: 8px;
}
.qf-substrip__cell p {
  font-family: var(--qf-font); font-size: 13px; line-height: 1.5;
  color: var(--qf-fg-dim); margin: 0;
}

/* ── Features (12 tiles) ────────────────────────────────────── */
.qf-features {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: var(--qf-line); border: 1px solid var(--qf-line);
  border-radius: 12px; overflow: hidden;
}
.qf-feature {
  background: var(--qf-card);
  padding: 22px 22px 24px;
  display: flex; flex-direction: column; gap: 12px;
  min-height: 170px;
}
.qf-feature__icon {
  width: 32px; height: 32px; border-radius: 8px;
  background: rgba(82, 130, 255, 0.08);
  border: 1px solid var(--qf-blue-line);
  display: inline-flex; align-items: center; justify-content: center;
  color: oklch(0.85 0.11 220);
}
.qf-feature__name {
  font-family: var(--qf-font); font-weight: 600; font-size: 15px;
  color: var(--qf-fg); letter-spacing: -0.01em;
}
.qf-feature p {
  font-family: var(--qf-font); font-size: 12.5px; line-height: 1.5;
  color: var(--qf-fg-dim); margin: 0; text-wrap: pretty;
}

/* ── Candor (three if-then rows) ────────────────────────────── */
.qf-candor h2 {
  margin: 0 0 56px; max-width: 940px;
}
.qf-candor__rows {
  display: flex; flex-direction: column; gap: 1px;
  background: var(--qf-line);
  border: 1px solid var(--qf-line); border-radius: 12px; overflow: hidden;
}
.qf-candor__row {
  display: grid; grid-template-columns: 1.4fr auto 1fr; gap: 32px;
  align-items: center; padding: 28px 32px;
  background: var(--qf-card); position: relative;
}
.qf-candor__row--us {
  background: oklch(0.16 0.02 285);
}
.qf-candor__row--us::before {
  content: ""; position: absolute; top: 0; bottom: 0; left: 0; width: 3px;
  background: var(--qf-grad-emerald);
}
.qf-candor__if {
  font-family: var(--qf-font); font-weight: 400; font-size: 22px;
  line-height: 1.3; color: var(--qf-fg); letter-spacing: -0.015em;
  text-wrap: balance;
}
.qf-candor__arrow {
  font-family: var(--qf-mono); font-size: 10px;
  color: var(--qf-fg-faint); letter-spacing: 0.16em;
}
.qf-candor__then {
  font-family: var(--qf-serif); font-size: 26px; line-height: 1.25;
  letter-spacing: -0.01em; text-wrap: balance;
  color: #c9b8ff;
}
.qf-candor__row:nth-child(2) .qf-candor__then { color: #9bd1ff; }
.qf-candor__row--us .qf-candor__then { color: var(--qf-emerald-2); font-style: italic; }

/* ── Closing ────────────────────────────────────────────────── */
.qf-close {
  position: relative; padding: 140px 0 120px;
  background: var(--qf-bg); overflow: hidden;
}
.qf-close__wash {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse at 30% 40%, rgba(82, 130, 255, 0.32), transparent 60%),
    radial-gradient(ellipse at 75% 65%, rgba(240, 180, 70, 0.18), transparent 65%);
  filter: blur(10px); pointer-events: none;
}
.qf-close__divider {
  position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--qf-line-3), transparent);
}
.qf-close__inner { position: relative; text-align: center; }
.qf-close__logo {
  display: flex; justify-content: center; margin-bottom: 36px;
  filter: drop-shadow(0 0 40px rgba(82, 130, 255, 0.5));
}
.qf-close h2 {
  font-family: var(--qf-font); font-weight: 600; font-size: 64px;
  line-height: 1.02; letter-spacing: -0.035em; color: var(--qf-fg);
  margin: 0 auto; max-width: 980px; text-wrap: balance;
}
.qf-close__lede {
  font-family: var(--qf-font); font-size: 18px; line-height: 1.55;
  color: var(--qf-fg-dim); max-width: 720px; margin: 28px auto 0;
  text-wrap: pretty;
}
.qf-close__ctas {
  display: flex; gap: 14px; justify-content: center;
  margin-top: 44px; flex-wrap: wrap;
}
.qf-close__meta {
  margin-top: 48px; display: inline-flex; align-items: center; gap: 22px;
  flex-wrap: wrap; padding: 14px 22px; border-radius: 999px;
  border: 1px solid var(--qf-line-2); background: rgba(255, 255, 255, 0.02);
  justify-content: center;
}
.qf-close__meta-item { display: flex; align-items: center; gap: 8px; }
.qf-close__meta-item span:last-child {
  font-family: var(--qf-font); font-size: 13px; color: var(--qf-fg);
}

.qf-close .cf-form { max-width: 640px; margin: 36px auto 0; text-align: left; }
.qf-close .cf-form__actions .btn { font-family: var(--qf-font); }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 960px) {
  .qf-container { padding: 0 24px; }
  .qf-display--xxl { font-size: 48px; }
  .qf-display--xl  { font-size: 44px; }
  .qf-display--lg  { font-size: 36px; }
  .qf-close h2 { font-size: 44px; }

  .qf-twocol { grid-template-columns: 1fr; gap: 28px; }
  .qf-problem__inner { grid-template-columns: 1fr; gap: 16px; }
  .qf-diagram__body { grid-template-columns: 1fr; }
  .qf-diagram__col--form { border-right: none; border-bottom: 1px solid var(--qf-line); }

  .qf-pillars { grid-template-columns: 1fr; }
  .qf-pillar--big { grid-row: auto; }

  .qf-wedge__grid { grid-template-columns: 1fr; }
  .qf-actions { grid-template-columns: repeat(2, 1fr); }
  .qf-qtypes, .qf-features { grid-template-columns: repeat(2, 1fr); }
  .qf-extras { grid-template-columns: 1fr; }
  .qf-dist, .qf-substrip { grid-template-columns: 1fr; }

  .qf-stations { grid-template-columns: 1fr; }
  .qf-arrow { flex-direction: row; padding-top: 0; }
  .qf-arrow svg { transform: rotate(90deg); }

  .qf-candor__row { grid-template-columns: 1fr; gap: 14px; padding: 22px 22px; }
  .qf-candor__if  { font-size: 18px; }
  .qf-candor__then { font-size: 20px; }
  .qf-more { grid-template-columns: 1fr; }
}