/* NUDO — main stylesheet
   Loads after tokens.css. Pure CSS, no preprocessor. */

/* ── reset / base ───────────────────────────────────────────── */

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  background: var(--c-ink);
  color: var(--c-paper);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  overflow-x: hidden;
  font-feature-settings: "ss01", "cv11";
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }

::selection {
  background: var(--c-purple-core);
  color: var(--c-paper);
}

/* ── layout primitives ──────────────────────────────────────── */

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.container-sm {
  max-width: var(--container-sm);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

section { position: relative; }

/* ── typography helpers ─────────────────────────────────────── */

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--tracking-mega);
  text-transform: uppercase;
  color: var(--c-paper-dim);
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
}

.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--c-paper-dim);
}

.text-grad {
  background: var(--grad-purple);
  -webkit-background-clip: text;
          background-clip: text;
  color: transparent;
}

/* ── nav ────────────────────────────────────────────────────── */

.nav {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  padding-block: var(--s-5);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-h3);
  letter-spacing: var(--tracking-snug);
}

.brand__mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  /* the source logo is black-on-transparent; invert to render white on dark */
  filter: invert(1);
}

.nav__city {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--tracking-mega);
  text-transform: uppercase;
  color: var(--c-paper-dim);
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
}

.nav__city::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-purple-bright);
  box-shadow: 0 0 12px var(--c-purple-bright);
  animation: pulse 2.6s var(--ease-in-out) infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.55; transform: scale(1); }
  50%      { opacity: 1;    transform: scale(1.25); }
}

/* ── hero ───────────────────────────────────────────────────── */

.hero {
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-block: var(--s-10) var(--s-9);
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: var(--z-bg);
  pointer-events: none;
}

.hero__glow {
  position: absolute;
  width: 80vw;
  height: 80vw;
  max-width: 1200px;
  max-height: 1200px;
  left: -10vw;
  top: 20%;
  background: radial-gradient(closest-side, rgba(122, 7, 217, 0.35), transparent 70%);
  filter: blur(30px);
  animation: drift 18s var(--ease-in-out) infinite;
}

.hero__glow--alt {
  left: auto;
  right: -15vw;
  top: -10%;
  background: radial-gradient(closest-side, rgba(139, 71, 255, 0.22), transparent 70%);
  animation-delay: -8s;
  animation-duration: 24s;
}

@keyframes drift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50%      { transform: translate(4vw, -3vh) scale(1.08); }
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse at 30% 40%, black 30%, transparent 75%);
  z-index: var(--z-bg);
}

.hero__inner {
  position: relative;
  z-index: var(--z-base);
  max-width: 980px;
}

.hero__headline {
  font-family: var(--font-display);
  font-size: var(--fs-mega);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
  font-weight: 500;
  margin-block: var(--s-5) var(--s-5);
}

.hero__headline em {
  font-style: normal;
  background: var(--grad-purple);
  -webkit-background-clip: text;
          background-clip: text;
  color: transparent;
}

.hero__sub {
  font-size: clamp(1.125rem, 1vw + 1rem, 1.5rem);
  line-height: var(--lh-loose);
  color: var(--c-paper-dim);
  max-width: 640px;
  margin-bottom: var(--s-7);
}

/* ── form ───────────────────────────────────────────────────── */

.signup {
  display: flex;
  gap: var(--s-3);
  align-items: stretch;
  max-width: 520px;
  padding: var(--s-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  background: rgba(20, 20, 20, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: border-color var(--d-medium) var(--ease-out),
              box-shadow var(--d-medium) var(--ease-out);
}

.signup:focus-within {
  border-color: var(--c-purple-bright);
  box-shadow: var(--halo-purple);
}

.signup__input {
  flex: 1;
  background: transparent;
  border: 0;
  outline: 0;
  padding: var(--s-3) var(--s-5);
  color: var(--c-paper);
  font: inherit;
  font-size: var(--fs-body);
}

.signup__input::placeholder {
  color: var(--c-paper-mute);
}

.signup__submit {
  position: relative;
  border-radius: var(--r-pill);
  padding: var(--s-3) var(--s-6);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-body);
  letter-spacing: var(--tracking-snug);
  color: var(--c-paper);
  background: var(--grad-purple);
  background-size: 200% 100%;
  background-position: 0% 50%;
  transition: background-position var(--d-medium) var(--ease-out),
              transform var(--d-fast) var(--ease-out);
}

.signup__submit:hover {
  background-position: 100% 50%;
}

.signup__submit:active {
  transform: scale(0.98);
}

.signup__submit[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
}

.signup__note {
  margin-top: var(--s-4);
  font-size: var(--fs-small);
  color: var(--c-paper-mute);
  letter-spacing: var(--tracking-snug);
}

.signup__status {
  margin-top: var(--s-4);
  font-size: var(--fs-small);
  min-height: 1.2em;
}

.signup__status--ok    { color: #86e6a0; }
.signup__status--err   { color: #ff8585; }

/* ── marquee ────────────────────────────────────────────────── */

.marquee {
  margin-top: var(--s-8);
  border-block: 1px solid var(--c-line);
  padding-block: var(--s-5);
  overflow: hidden;
  position: relative;
  mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, black 8%, black 92%, transparent);
}

.marquee__track {
  display: flex;
  gap: var(--s-8);
  width: max-content;
  animation: scroll 40s linear infinite;
  align-items: center;
}

.marquee__item {
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 2vw + 0.5rem, 2rem);
  font-weight: 500;
  letter-spacing: var(--tracking-snug);
  color: var(--c-paper-dim);
  white-space: nowrap;
  display: inline-flex;
  align-items: center;
  gap: var(--s-8);
}

.marquee__item::after {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-purple-core);
}

@keyframes scroll {
  to { transform: translateX(-50%); }
}

/* ── manifesto / contrast section ───────────────────────────── */

.manifesto {
  padding-block: var(--s-10);
  border-top: 1px solid var(--c-line);
}

.manifesto__title {
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
  font-weight: 500;
  margin-block: var(--s-5) var(--s-8);
  max-width: 900px;
}

.contrast {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-4);
}

@media (min-width: 760px) {
  .contrast { grid-template-columns: 1fr 1fr; gap: var(--s-5); }
}

.contrast__col {
  border: 1px solid var(--c-line);
  border-radius: var(--r-3);
  padding: var(--s-7);
  background: var(--c-ink-soft);
}

.contrast__col--before {
  /* subtle desaturated feel */
}

.contrast__col--after {
  border-color: transparent;
  background:
    linear-gradient(var(--c-ink-soft), var(--c-ink-soft)) padding-box,
    var(--grad-purple-diag) border-box;
  border: 1px solid transparent;
  box-shadow: var(--halo-purple-soft);
}

.contrast__label {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--tracking-mega);
  text-transform: uppercase;
  color: var(--c-paper-mute);
  margin-bottom: var(--s-5);
}

.contrast__col--after .contrast__label {
  color: var(--c-purple-bright);
}

.contrast ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}

.contrast li {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.125rem, 1vw + 1rem, 1.5rem);
  line-height: var(--lh-snug);
  letter-spacing: var(--tracking-snug);
  display: flex;
  align-items: baseline;
  gap: var(--s-3);
}

.contrast__col--before li {
  color: var(--c-paper-dim);
  text-decoration: line-through;
  text-decoration-color: var(--c-line-soft);
}

.contrast__col--after li::before {
  content: "→";
  font-family: var(--font-mono);
  color: var(--c-purple-bright);
}

.contrast__col--before li::before {
  content: "×";
  font-family: var(--font-mono);
  color: var(--c-paper-mute);
}

/* ── how it works ───────────────────────────────────────────── */

.how {
  padding-block: var(--s-10);
  border-top: 1px solid var(--c-line);
}

.how__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s-5);
  align-items: end;
  margin-bottom: var(--s-8);
}

@media (min-width: 880px) {
  .how__head {
    grid-template-columns: 1fr 1fr;
    gap: var(--s-7);
  }
}

.how__title {
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
  font-weight: 500;
  margin-top: var(--s-5);
  max-width: 24ch;
}

.how__intro {
  color: var(--c-paper-dim);
  font-size: var(--fs-body);
  line-height: var(--lh-loose);
  max-width: 48ch;
}

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--c-line);
}

.steps__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--s-6);
  padding-block: var(--s-7);
  border-bottom: 1px solid var(--c-line);
  align-items: start;
}

@media (min-width: 760px) {
  .steps__item {
    grid-template-columns: 88px 1fr 1fr;
    gap: var(--s-7);
    align-items: baseline;
  }
}

.steps__num {
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  letter-spacing: var(--tracking-mega);
  color: var(--c-purple-bright);
}

.steps__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.5rem, 1.5vw + 0.75rem, 2.25rem);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
}

.steps__desc {
  color: var(--c-paper-dim);
  line-height: var(--lh-loose);
  max-width: 42ch;
}

/* ── closing CTA strip ──────────────────────────────────────── */

.closer {
  padding-block: var(--s-10);
  border-top: 1px solid var(--c-line);
  text-align: center;
}

.closer__title {
  font-family: var(--font-display);
  font-size: var(--fs-h1);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-tight);
  font-weight: 500;
  margin-bottom: var(--s-7);
  max-width: 20ch;
  margin-inline: auto;
}

.closer .signup {
  margin-inline: auto;
}

/* ── footer ─────────────────────────────────────────────────── */

.footer {
  padding-block: var(--s-8) var(--s-5);
  border-top: 1px solid var(--c-line);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  gap: var(--s-5);
  align-items: flex-start;
}

@media (min-width: 720px) {
  .footer__inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer__meta {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--tracking-mega);
  text-transform: uppercase;
  color: var(--c-paper-mute);
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: var(--tracking-snug);
}

.footer__brand .brand__mark {
  width: 28px;
  height: 28px;
}

/* ── reveal on scroll ───────────────────────────────────────── */

[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--d-slow) var(--ease-out),
              transform var(--d-slow) var(--ease-out);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}