/* =========================================================
   IRUYA LABS — design tokens
========================================================= */
:root {
  --bg: #101114;
  --bg-alt: #16181D;
  --paper: #F5F2E9;
  --paper-hover: #F9F7F0;
  --ink: #101114;
  --ink-soft: #45433D;

  --text-primary: #F1EFE9;
  --text-secondary: #979AA3;
  --text-tertiary: #63666F;

  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.18);

  --yellow: #F2D93B;
  --yellow-dim: rgba(242, 217, 59, 0.14);
  --violet: #8B7CF6;
  --green: #5FD98A;
  --green-dim: rgba(95, 217, 138, 0.14);

  --font-display: 'IBM Plex Mono', 'SFMono-Regular', monospace;
  --font-body: 'IBM Plex Sans', 'Segoe UI', sans-serif;

  --container: 1160px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

/* =========================================================
   RESET
========================================================= */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4 { font-family: var(--font-display); margin: 0; line-height: 1.15; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
input { font-family: inherit; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

:focus-visible {
  outline: 2px solid var(--yellow);
  outline-offset: 3px;
  border-radius: 3px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* =========================================================
   HELPERS
========================================================= */
.eyebrow {
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--yellow);
  margin: 0 0 16px;
  text-transform: uppercase;
}

.section__head {
  max-width: 620px;
  margin: 0 auto 52px;
  text-align: center;
}
.section__head h2 {
  font-size: clamp(26px, 3.6vw, 38px);
  font-weight: 600;
  letter-spacing: -0.01em;
}
.section__sub {
  margin-top: 14px;
  color: var(--text-secondary);
  font-size: 16.5px;
  font-family: var(--font-body);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 14.5px;
  font-family: var(--font-display);
  border: 1px solid transparent;
  transition: transform 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn--primary { background: var(--yellow); color: #1B1704; }
.btn--primary:hover { background: #f5e263; }
.btn--ghost { background: transparent; color: var(--text-primary); border-color: var(--line-strong); }
.btn--ghost:hover { border-color: var(--yellow); color: var(--yellow); }
.btn--sm { padding: 9px 18px; font-size: 13px; }

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal--delay { transition-delay: 0.1s; }
.reveal--delay-2 { transition-delay: 0.2s; }

/* =========================================================
   NAV
========================================================= */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}
.nav.is-scrolled {
  background: rgba(16, 17, 20, 0.85);
  backdrop-filter: blur(14px);
  border-color: var(--line);
}
.nav__inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.03em;
}
.brand__mark {
  color: var(--yellow);
  font-weight: 700;
}

.nav__links { display: flex; gap: 30px; }
.nav__links a {
  font-size: 14.5px;
  font-family: var(--font-display);
  color: var(--text-secondary);
  transition: color 0.2s var(--ease);
}
.nav__links a:hover { color: var(--text-primary); }

.nav__actions { display: flex; align-items: center; gap: 14px; }
.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  width: 22px;
  background: none;
  border: none;
  padding: 6px 0;
}
.nav__toggle span { display: block; height: 2px; background: var(--text-primary); border-radius: 2px; }

.nav__mobile {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 8px 24px 20px;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--line);
}
.nav__mobile a:not(.btn) {
  padding: 12px 0;
  font-size: 14.5px;
  font-family: var(--font-display);
  color: var(--text-secondary);
  border-bottom: 1px solid var(--line);
}
.nav__mobile .btn { margin-top: 12px; width: fit-content; }
.nav__mobile.is-open { display: flex; }

/* =========================================================
   HERO
========================================================= */
.hero {
  position: relative;
  padding: 96px 24px 88px;
  overflow: hidden;
}
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, black 40%, transparent 100%);
  pointer-events: none;
}
.hero__inner {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}
.hero__title {
  font-size: clamp(34px, 5.4vw, 58px);
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
}
.hero__title-accent { color: var(--yellow); }
.hero__sub {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto 34px;
}
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; margin-bottom: 56px; }

.statline {
  display: inline-flex;
  align-items: center;
  gap: 28px;
  padding: 18px 32px;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}
.statline__item { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.statline__value {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--yellow);
}
.statline__label {
  font-size: 11.5px;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-family: var(--font-display);
}
.statline__sep { width: 1px; height: 30px; background: var(--line-strong); }

/* =========================================================
   LAB INDEX
========================================================= */
.lab-index { padding: 30px 24px 110px; max-width: var(--container); margin: 0 auto; }

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

.index-card {
  background: var(--paper);
  color: var(--ink);
  border-radius: var(--radius-md);
  border: 1px dashed rgba(16, 17, 20, 0.22);
  padding: 26px 24px 28px;
  display: flex;
  flex-direction: column;
  transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}
.index-card:hover { transform: translateY(-4px); background: var(--paper-hover); }

.index-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}
.index-card__num {
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 999px;
}
.status--live { background: var(--green-dim); color: #1E6B41; }
.status--building { background: rgba(16,17,20,0.08); color: var(--ink-soft); }
.status__dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: currentColor;
}
.status--live .status__dot { animation: pulse 2s ease-in-out infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.index-card__name {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 6px;
  letter-spacing: -0.01em;
}
.index-card__working {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--ink-soft);
}
.index-card__tag {
  font-family: var(--font-display);
  font-size: 12px;
  color: var(--ink-soft);
  margin-bottom: 16px;
}
.index-card__desc {
  font-size: 15px;
  line-height: 1.55;
  color: #2B2A26;
  margin-bottom: 24px;
  flex-grow: 1;
}
.index-card__link {
  align-self: flex-start;
  font-family: var(--font-display);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--ink);
  border-bottom: 1px solid var(--ink);
  padding-bottom: 2px;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
  transition: opacity 0.2s var(--ease);
}
.index-card__link:hover { opacity: 0.6; }
.index-card__link--disabled {
  color: var(--ink-soft);
  border-bottom-color: rgba(16,17,20,0.28);
  cursor: not-allowed;
}
.index-card__link--disabled:hover { opacity: 1; }

/* =========================================================
   MANIFESTO
========================================================= */
.manifesto { padding: 30px 24px 110px; max-width: var(--container); margin: 0 auto; }
.manifesto__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.rule-card {
  padding: 30px 26px;
  border-top: 2px solid var(--yellow);
  background: var(--bg-alt);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}
.rule-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}
.rule-card p {
  color: var(--text-secondary);
  font-size: 15px;
  font-family: var(--font-body);
}

/* =========================================================
   NOTIFY
========================================================= */
.notify {
  margin: 0 24px 100px;
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 72px 32px;
}
.notify__inner { max-width: 520px; margin: 0 auto; text-align: center; }
.notify h2 { font-size: clamp(26px, 3.4vw, 34px); font-weight: 600; margin-bottom: 14px; }
.notify__sub { color: var(--text-secondary); margin-bottom: 32px; font-size: 15.5px; }

.notify__form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}
.notify__form input {
  flex: 1 1 260px;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-strong);
  background: var(--bg);
  color: var(--text-primary);
  font-size: 14.5px;
}
.notify__form input::placeholder { color: var(--text-tertiary); }
.notify__form input:focus { border-color: var(--yellow); outline: none; }

.notify__status {
  margin-top: 16px;
  font-size: 13.5px;
  font-family: var(--font-display);
  color: var(--green);
  min-height: 18px;
}
.notify__status.is-error { color: #F26B5B; }

/* =========================================================
   FOOTER
========================================================= */
.footer { border-top: 1px solid var(--line); padding: 60px 24px 30px; }
.footer__inner {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 44px;
}
.footer__brand p { color: var(--text-tertiary); font-size: 14px; margin-top: 14px; max-width: 240px; font-family: var(--font-body); }
.brand--footer { margin-bottom: 4px; }
.footer__col { display: flex; flex-direction: column; gap: 12px; }
.footer__col h4 {
  font-family: var(--font-display);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  margin-bottom: 4px;
  font-weight: 500;
}
.footer__col a { color: var(--text-secondary); font-size: 14.5px; font-family: var(--font-body); transition: color 0.2s var(--ease); }
.footer__col a:hover { color: var(--text-primary); }

.footer__bottom {
  max-width: var(--container);
  margin: 0 auto;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 13px;
  color: var(--text-tertiary);
  font-family: var(--font-display);
}
.footer__legal { display: flex; gap: 20px; }
.footer__legal a:hover { color: var(--text-primary); }

/* =========================================================
   RESPONSIVE
========================================================= */
@media (max-width: 980px) {
  .index-grid { grid-template-columns: 1fr; }
  .manifesto__grid { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
  .statline { gap: 18px; padding: 16px 20px; }
}

@media (max-width: 720px) {
  .nav__links { display: none; }
  .nav__toggle { display: flex; }
  .nav__actions .btn--sm { display: none; }
  .hero { padding: 56px 20px 64px; }
  .footer__inner { grid-template-columns: 1fr; }
  .statline { flex-wrap: wrap; justify-content: center; }
  .notify__form { flex-direction: column; }
}