/* ============================================================
   ultrarare.design — Linear-inspired dark system
   Tokens sourced from DESIGN-linear.app.md
   ============================================================ */

:root {
  /* Brand & accent */
  --primary: #5e6ad2;
  --primary-hover: #828fff;
  --primary-focus: #5e69d1;
  --on-primary: #ffffff;

  /* Ink */
  --ink: #f7f8f8;
  --ink-muted: #d0d6e0;
  --ink-subtle: #8a8f98;
  --ink-tertiary: #62666d;

  /* Surfaces */
  --canvas: #010102;
  --surface-1: #0f1011;
  --surface-2: #141516;
  --surface-3: #18191a;

  /* Hairlines */
  --hairline: #23252a;
  --hairline-strong: #34343a;

  /* Radii */
  --r-xs: 4px;
  --r-sm: 6px;
  --r-md: 8px;
  --r-lg: 12px;
  --r-xl: 16px;
  --r-xxl: 24px;
  --r-pill: 9999px;

  /* Spacing */
  --s-xs: 8px;
  --s-sm: 12px;
  --s-md: 16px;
  --s-lg: 24px;
  --s-xl: 32px;
  --s-xxl: 48px;
  --s-section: 96px;

  --container: 1180px;
  --nav-h: 56px;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  --font-display: "Inter", "SF Pro Display", -apple-system, system-ui, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.05px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, p, ol, ul { margin: 0; }
ol, ul { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }

img { max-width: 100%; display: block; }

::selection { background: rgba(94, 106, 210, 0.32); color: #fff; }

:focus-visible {
  outline: 2px solid var(--primary-focus);
  outline-offset: 2px;
  border-radius: var(--r-xs);
}

/* ===== Layout ===== */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--s-lg);
}

.section {
  padding-block: var(--s-section);
  scroll-margin-top: calc(var(--nav-h) + 16px);
}

.section__head {
  max-width: 640px;
  margin-bottom: var(--s-xxl);
}

.section__title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -1px;
  margin-top: var(--s-sm);
}

/* ===== Eyebrow ===== */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.4px;
  text-transform: uppercase;
  color: var(--ink-subtle);
}
.eyebrow__dot {
  width: 6px; height: 6px;
  border-radius: var(--r-pill);
  background: var(--primary);
}

/* ===== Buttons ===== */
.btn {
  --btn-translate: 0px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.2;
  padding: 10px 16px;
  border-radius: var(--r-md);
  border: 1px solid transparent;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease),
              transform 0.25s var(--ease-out), box-shadow 0.25s var(--ease);
  transform: translate(var(--btn-translate, 0), 0);
}
.btn--sm { padding: 8px 14px; }
.btn--lg { padding: 12px 20px; font-size: 15px; }

.btn--primary {
  background: var(--primary);
  color: var(--on-primary);
}
.btn--primary:hover {
  background: var(--primary-hover);
  box-shadow: 0 6px 24px -8px rgba(94, 106, 210, 0.7);
}
.btn--primary:active { background: var(--primary-focus); }

.btn--secondary {
  background: var(--surface-1);
  color: var(--ink);
  border-color: var(--hairline);
}
.btn--secondary:hover {
  background: var(--surface-2);
  border-color: var(--hairline-strong);
}

/* ===== Wordmark ===== */
.wordmark {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.4px;
  color: var(--ink);
}
.wordmark__accent { color: var(--primary); }

/* ===== Nav ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(1, 1, 2, 0.6);
  border-bottom: 1px solid transparent;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease), backdrop-filter 0.3s var(--ease);
}
.nav.is-scrolled {
  background: rgba(1, 1, 2, 0.8);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom-color: var(--hairline);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav__menu {
  display: flex;
  align-items: center;
  gap: var(--s-lg);
}
.nav__link {
  position: relative;
  font-size: 14px;
  color: var(--ink-subtle);
  transition: color 0.2s var(--ease);
}
.nav__link::after {
  content: "";
  position: absolute;
  left: 0; bottom: -4px;
  width: 100%; height: 1px;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s var(--ease-out);
}
.nav__link:hover { color: var(--ink); }
.nav__link:hover::after { transform: scaleX(1); }

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px; height: 40px;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
}
.nav__toggle span {
  width: 20px; height: 1.5px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}
.nav.is-open .nav__toggle span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav.is-open .nav__toggle span:nth-child(2) { opacity: 0; }
.nav.is-open .nav__toggle span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ===== Hero ===== */
.hero {
  padding-top: clamp(72px, 12vh, 140px);
  padding-bottom: clamp(64px, 10vh, 120px);
}
.hero__inner { max-width: 860px; }
.hero__eyebrow {
  opacity: 0;
  animation: rise 0.7s var(--ease-out) 0.1s forwards;
}
.hero__title {
  font-size: clamp(40px, 8vw, 80px);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -0.045em;
  margin-top: var(--s-md);
  margin-bottom: var(--s-lg);
}
.line { display: block; overflow: hidden; padding-bottom: 0.04em; }
.line__inner {
  display: block;
  transform: translateY(110%);
  animation: lineReveal 0.9s var(--ease-out) forwards;
}
.line:nth-child(1) .line__inner { animation-delay: 0.18s; }
.line:nth-child(2) .line__inner { animation-delay: 0.30s; }

.hero__sub {
  font-size: clamp(17px, 2.4vw, 20px);
  font-weight: 400;
  line-height: 1.5;
  color: var(--ink-muted);
  max-width: 560px;
  letter-spacing: -0.1px;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-sm);
  margin-top: var(--s-xl);
}
.hero__note {
  margin-top: var(--s-lg);
  font-size: 13px;
  color: var(--ink-tertiary);
}

/* ===== Cards ===== */
.card {
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: var(--s-lg);
  transition: transform 0.3s var(--ease-out), border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--hairline-strong);
  background: var(--surface-2);
}
.card__title {
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.4px;
  line-height: 1.25;
}
.card__body {
  margin-top: var(--s-xs);
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink-subtle);
}

/* ===== Steps ===== */
.steps, .features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-md);
}
.step { position: relative; padding-top: var(--s-xl); }
.step__num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--primary);
  letter-spacing: 0.5px;
}
.step .card__title { margin-top: var(--s-md); }

/* ===== Work ===== */
.work {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-lg);
}
.work-card {
  display: block;
  transform-style: preserve-3d;
  will-change: transform;
  transition: transform 0.35s var(--ease-out);
}
.browser {
  position: relative;
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: var(--r-xl);
  overflow: hidden;
  transition: border-color 0.3s var(--ease), box-shadow 0.4s var(--ease);
}
.work-card:hover .browser {
  border-color: var(--hairline-strong);
  box-shadow: 0 24px 60px -28px rgba(0, 0, 0, 0.9);
}
.browser__bar {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 34px;
  padding-inline: 12px;
  border-bottom: 1px solid var(--hairline);
  background: var(--surface-2);
}
.browser__dots { display: inline-flex; gap: 6px; }
.browser__dots i {
  width: 9px; height: 9px;
  border-radius: var(--r-pill);
  background: var(--hairline-strong);
}
.browser__url {
  flex: 1;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-tertiary);
  background: var(--canvas);
  border-radius: var(--r-sm);
  padding: 3px 10px;
  margin-right: 33px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.browser__view {
  aspect-ratio: 4 / 3.1;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--canvas);
  overflow: hidden;
}
.browser__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(1, 1, 2, 0.55);
  opacity: 0;
  transition: opacity 0.3s var(--ease);
}
.browser__overlay span {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  background: rgba(15, 16, 17, 0.9);
  border: 1px solid var(--hairline-strong);
  padding: 9px 16px;
  border-radius: var(--r-pill);
  transform: translateY(6px);
  transition: transform 0.3s var(--ease-out);
}
.browser__overlay .arrow { color: var(--primary); }
.work-card:hover .browser__overlay { opacity: 1; }
.work-card:hover .browser__overlay span { transform: translateY(0); }

.work-card__meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-top: var(--s-md);
}
.work-card__heading {
  display: flex;
  align-items: baseline;
  gap: var(--s-sm);
  flex-wrap: wrap;
}
.work-card__title {
  font-size: 18px;
  font-weight: 500;
  letter-spacing: -0.3px;
}
.work-card__cat {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  color: var(--ink-tertiary);
}
.work-card__desc {
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-subtle);
  line-height: 1.5;
}

/* ===== Mock site skeletons (placeholder thumbnails) ===== */
.mock__nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.mock__logo { width: 26px; height: 7px; border-radius: 3px; background: var(--ink-subtle); }
.mock__navlinks { display: flex; gap: 7px; }
.mock__navlinks i { width: 16px; height: 5px; border-radius: 3px; background: var(--hairline-strong); }

.mock__h1 { display: block; height: 13px; border-radius: 4px; background: var(--ink-muted); width: 78%; }
.mock__h1--short { width: 48%; }
.mock__h1--center { width: 60%; margin-inline: auto; }
.mock__line { display: block; height: 6px; border-radius: 3px; background: var(--hairline-strong); width: 90%; }
.mock__line--short { width: 60%; }
.mock__btn { display: block; height: 12px; width: 64px; border-radius: 4px; background: var(--primary); }
.mock__btn--center { margin-inline: auto; }

.mock__hero { display: flex; flex-direction: column; gap: 8px; margin-top: 4px; }
.mock__tiles { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: auto; }
.mock__tiles span { aspect-ratio: 16/9; border-radius: 6px; background: var(--surface-2); border: 1px solid var(--hairline); }

.mock--events .mock__banner {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 16px;
}
.mock__gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.mock__gallery span { aspect-ratio: 1; border-radius: 6px; background: var(--surface-2); border: 1px solid var(--hairline); }

.mock--yoga .mock__split { display: grid; grid-template-columns: 1.1fr 1fr; gap: 12px; flex: 1; align-items: center; }
.mock__col { display: flex; flex-direction: column; gap: 8px; }
.mock__list { display: flex; flex-direction: column; gap: 8px; }
.mock__list span {
  height: 22px;
  border-radius: 6px;
  background: var(--surface-2);
  border: 1px solid var(--hairline);
}

/* ===== CTA banner ===== */
.section--cta { padding-top: 0; }
.cta-banner {
  background: var(--surface-1);
  border: 1px solid var(--hairline);
  border-radius: var(--r-xxl);
  padding: clamp(32px, 6vw, 64px);
  text-align: center;
}
.cta-banner__title {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 600;
  letter-spacing: -1px;
  line-height: 1.15;
}
.cta-banner__sub {
  margin: var(--s-md) auto var(--s-xl);
  max-width: 460px;
  color: var(--ink-subtle);
  font-size: 16px;
  line-height: 1.55;
}

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--hairline);
  padding-block: var(--s-xxl);
}
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-lg);
  align-items: center;
  justify-content: space-between;
}
.footer__tag {
  margin-top: 6px;
  font-size: 13px;
  color: var(--ink-tertiary);
}
.footer__links { display: flex; gap: var(--s-lg); }
.footer__links a {
  font-size: 14px;
  color: var(--ink-subtle);
  transition: color 0.2s var(--ease);
}
.footer__links a:hover { color: var(--ink); }
.footer__copy { font-size: 13px; color: var(--ink-tertiary); }

/* ===== Scroll reveal ===== */
[data-reveal] {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
  transition-delay: var(--delay, 0ms);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ===== Keyframes ===== */
@keyframes lineReveal {
  from { transform: translateY(110%); }
  to { transform: translateY(0); }
}
@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 1024px) {
  .steps, .features { grid-template-columns: repeat(3, 1fr); }
  .work { grid-template-columns: repeat(2, 1fr); gap: var(--s-md); }
}

@media (max-width: 768px) {
  :root { --s-section: 72px; }

  .nav__menu {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: var(--s-xs);
    padding: var(--s-md) var(--s-lg) var(--s-lg);
    background: rgba(1, 1, 2, 0.92);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid var(--hairline);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease-out);
  }
  .nav.is-open .nav__menu {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav__link { padding: 8px 0; font-size: 16px; }
  .nav__link::after { display: none; }
  .nav__menu .btn { margin-top: var(--s-xs); }
  .nav__toggle { display: flex; }

  .steps, .features, .work { grid-template-columns: 1fr; }
  .hero__actions .btn { flex: 1; }
}

@media (max-width: 420px) {
  .container { padding-inline: var(--s-md); }
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-delay: 0ms !important;
    transition-duration: 0.001ms !important;
  }
  .line__inner { transform: none; }
  [data-reveal] { opacity: 1; transform: none; }
  .hero__eyebrow { opacity: 1; }
}