/* Design tokens: docs/03-user-experience.md §7 */
:root {
  --void: #05070d;
  --surface: #0b1120;
  --raised: #111a2e;
  --line: rgba(34, 211, 238, 0.32);
  --line-strong: rgba(34, 211, 238, 0.6);
  --cyan: #22d3ee;
  --blue: #3b82f6;
  --violet: #8b5cf6;
  --gold: #f5c451;
  --text: #e6f1ff;
  --muted: #9fb3c8;
  --warn: #fbbf24;
  --ok: #34d399;
  --radius: 14px;
  --display: "Chakra Petch", system-ui, sans-serif;
  --body: "Inter", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
  color-scheme: dark;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--void);
  color: var(--text);
  font: 16px / 1.6 var(--body);
  -webkit-font-smoothing: antialiased;
}

/* Variant A/B: only the assigned hero copy is shown. The assignment lives on <html>
   (data-variant); content blocks use a separate attribute so the rule never hides <html>. */
[data-show-variant] {
  display: none;
}
html[data-variant="narrative"] [data-show-variant="narrative"],
html[data-variant="utility"] [data-show-variant="utility"],
html:not([data-variant]) [data-show-variant="narrative"] {
  display: block;
}

.backdrop {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60rem 40rem at 85% -10%, rgba(139, 92, 246, 0.18), transparent 60%),
    radial-gradient(50rem 35rem at -10% 20%, rgba(34, 211, 238, 0.12), transparent 60%),
    linear-gradient(rgba(34, 211, 238, 0.04) 1px, transparent 1px) 0 0 / 100% 48px,
    linear-gradient(90deg, rgba(34, 211, 238, 0.04) 1px, transparent 1px) 0 0 / 48px 100%,
    var(--void);
  mask-image: linear-gradient(to bottom, #000 60%, transparent);
}

a {
  color: var(--cyan);
}

.mono {
  font-family: var(--mono);
  letter-spacing: 0.02em;
}

/* ------------------------------------------------------------------ layout */

.topbar,
main,
.footer {
  width: min(1120px, calc(100% - 32px));
  margin-inline: auto;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
}

.wordmark {
  font: 700 22px / 1 var(--display);
  letter-spacing: 0.32em;
  color: var(--text);
  text-decoration: none;
  text-shadow: 0 0 18px rgba(34, 211, 238, 0.45);
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  padding: 56px 0 72px;
}

.eyebrow {
  margin: 0 0 16px;
  font: 600 13px / 1 var(--display);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

h1,
h2,
h3 {
  font-family: var(--display);
  line-height: 1.12;
  margin: 0 0 16px;
}

h1 {
  font-size: clamp(36px, 5.4vw, 60px);
  font-weight: 700;
}

h2 {
  font-size: clamp(26px, 3.4vw, 36px);
}

h3 {
  font-size: 20px;
}

.accent {
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede {
  max-width: 34rem;
  font-size: 18px;
  color: var(--muted);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 20px;
}

.honesty {
  font-size: 14px;
  color: var(--muted);
  border-left: 2px solid var(--violet);
  padding-left: 12px;
}

.section {
  padding: 56px 0;
}

/* ----------------------------------------------------------------- buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 10px;
  font: 600 15px / 1 var(--display);
  letter-spacing: 0.06em;
  text-decoration: none;
  cursor: pointer;
  transition:
    transform 160ms ease-out,
    box-shadow 200ms ease-out,
    background 200ms ease-out;
}

.btn:focus-visible,
.chip:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.btn-primary {
  border: 0;
  color: #031018;
  background: linear-gradient(90deg, var(--cyan), #67e8f9);
  box-shadow: 0 0 24px rgba(34, 211, 238, 0.35);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 36px rgba(34, 211, 238, 0.55);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: default;
  transform: none;
}

.btn-ghost {
  border: 1px solid var(--line);
  color: var(--text);
  background: rgba(11, 17, 32, 0.6);
}

.btn-ghost:hover {
  border-color: var(--line-strong);
}

/* ----------------------------------------------------------- System window */

.window {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(17, 26, 46, 0.92), rgba(11, 17, 32, 0.9));
  box-shadow:
    0 0 0 1px rgba(139, 92, 246, 0.08) inset,
    0 20px 60px rgba(0, 0, 0, 0.45),
    0 0 40px rgba(34, 211, 238, 0.08);
  overflow: hidden;
}

.window::after {
  /* faint scan lines */
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.025) 0 1px,
    transparent 1px 4px
  );
}

.window-head {
  display: flex;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  font: 600 13px / 1 var(--display);
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.window-body {
  padding: 20px 18px 22px;
}

.status {
  margin: 0;
  animation: assemble 900ms cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

.designation {
  margin: 0 0 12px;
  color: var(--muted);
}

.designation strong {
  color: var(--text);
}

.xp {
  height: 8px;
  border-radius: 99px;
  background: rgba(34, 211, 238, 0.12);
  overflow: hidden;
  margin-bottom: 20px;
}

.xp-fill {
  width: var(--fill);
  height: 100%;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  box-shadow: 0 0 12px var(--cyan);
  animation: fill 1400ms 400ms ease-out both;
}

.attrs {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.attrs li {
  display: grid;
  grid-template-columns: 100px 32px 1fr;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--muted);
}

.attrs b {
  color: var(--text);
  text-align: right;
}

.attrs i {
  display: block;
  height: 4px;
  width: var(--w);
  border-radius: 99px;
  background: var(--violet);
  box-shadow: 0 0 10px rgba(139, 92, 246, 0.7);
}

.next-quest {
  border: 1px dashed var(--line);
  border-radius: 10px;
  padding: 14px;
  background: rgba(5, 7, 13, 0.5);
}

.next-quest p {
  margin: 8px 0;
  font-weight: 600;
}

.tag {
  font: 600 11px / 1 var(--display);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.tag-muted {
  color: var(--gold);
}

/* ------------------------------------------------------------------- steps */

.steps {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.steps li {
  padding: 22px 18px;
}

.steps p,
.compare li {
  color: var(--muted);
  font-size: 15px;
  margin: 0;
}

.step-n {
  display: block;
  margin-bottom: 14px;
  color: var(--violet);
  font-size: 13px;
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 24px;
}

.compare-grid .window {
  padding: 22px;
}

.compare ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

.muted-window {
  border-color: rgba(159, 179, 200, 0.18);
  box-shadow: none;
  opacity: 0.85;
}

/* -------------------------------------------------------------------- form */

.form-window {
  max-width: 640px;
  margin-inline: auto;
}

fieldset {
  border: 0;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

legend {
  padding: 0;
  margin-bottom: 4px;
  font: 600 22px / 1.2 var(--display);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chip {
  min-height: 44px;
  padding: 0 16px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(5, 7, 13, 0.55);
  color: var(--text);
  font: 500 15px / 1 var(--body);
  cursor: pointer;
  transition:
    border-color 160ms,
    background 160ms;
}

.chip:hover {
  border-color: var(--line-strong);
}

.chip[aria-pressed="true"] {
  border-color: var(--cyan);
  background: rgba(34, 211, 238, 0.14);
  box-shadow: 0 0 16px rgba(34, 211, 238, 0.2);
}

.chips-small .chip {
  min-height: 36px;
  font-size: 13px;
}

label {
  display: grid;
  gap: 6px;
  font-size: 14px;
  color: var(--muted);
}

input,
select,
textarea {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(5, 7, 13, 0.7);
  color: var(--text);
  font: 16px / 1.4 var(--body);
}

textarea {
  resize: vertical;
}

.consent {
  grid-template-columns: 20px 1fr;
  align-items: start;
  gap: 10px;
}

.consent input {
  width: 18px;
  min-height: 18px;
  margin-top: 3px;
  accent-color: var(--cyan);
}

.optional,
.hint {
  color: var(--muted);
  font-size: 13px;
  margin: 0;
}

.field-error {
  margin: -6px 0 0;
  min-height: 0;
  color: var(--warn);
  font-size: 13px;
}

.field-error:empty {
  display: none;
}

.form-status {
  margin: 0;
  font-size: 14px;
}

.form-status[data-tone="warn"] {
  color: var(--warn);
}

.form-status[data-tone="ok"] {
  color: var(--ok);
}

.done h3 {
  color: var(--cyan);
  letter-spacing: 0.12em;
}

.founding {
  display: grid;
  gap: 10px;
  margin: 20px 0;
  padding: 16px;
  border: 1px solid rgba(245, 196, 81, 0.35);
  border-radius: 12px;
  background: rgba(245, 196, 81, 0.05);
}

.founding p {
  margin: 0;
}

.price-survey summary {
  cursor: pointer;
  color: var(--cyan);
}

.price-survey form {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

/* --------------------------------------------------------------------- faq */

.faq details {
  border-bottom: 1px solid rgba(159, 179, 200, 0.15);
  padding: 16px 0;
}

.faq summary {
  cursor: pointer;
  font: 600 17px / 1.3 var(--display);
}

.faq p {
  color: var(--muted);
  margin: 10px 0 0;
}

.footer {
  display: flex;
  gap: 20px;
  padding: 40px 0 56px;
  color: var(--muted);
  font-size: 14px;
}

/* --------------------------------------------------------------- motion */

@keyframes assemble {
  from {
    opacity: 0;
    transform: translateY(12px) scale(0.98);
    clip-path: inset(0 0 100% 0);
  }
  to {
    opacity: 1;
    transform: none;
    clip-path: inset(0 0 0 0);
  }
}

@keyframes fill {
  from {
    width: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    /* biome-ignore lint/complexity/noImportantStyles: reduced motion must override every animation */
    animation: none !important;
    /* biome-ignore lint/complexity/noImportantStyles: reduced motion must override every transition */
    transition: none !important;
  }
}

/* ------------------------------------------------------------- responsive */

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 24px;
  }
  .steps {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .steps,
  .compare-grid {
    grid-template-columns: 1fr;
  }
  .topbar .btn {
    display: none;
  }
  .footer {
    flex-wrap: wrap;
  }
}