/* zrr-base.css — zeroRISC base tokens, reset, typography */
@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;600&family=IBM+Plex+Sans:wght@400;500;600;700&family=Inter:wght@400;500&display=swap');

/* ─── Custom Properties ─────────────────────────────────────── */
:root {
  /* Palette */
  --zrr-brand-primary:       #0A1628;
  --zrr-accent-decorative:   #00C9A7;
  --zrr-accent-aa-light:     #007A66;
  --zrr-accent-aa-dark:      #00C9A7;
  --zrr-fg-light-primary:    #0A1628;
  --zrr-fg-light-secondary:  #3D5068;
  --zrr-fg-dark-primary:     #EFF3F8;
  --zrr-fg-dark-secondary:   #8CA3BF;
  --zrr-bg-light:            #F4F7FB;
  --zrr-bg-white:            #FFFFFF;
  --zrr-bg-dark:             #0A1628;
  --zrr-bg-dark-alt:         #0F2040;
  --zrr-bg-dark-card:        #162845;
  --zrr-border-dark:         rgba(255,255,255,0.10);
  --zrr-border-light:        rgba(10,22,40,0.12);

  /* Typography */
  --zrr-font-heading:   'IBM Plex Sans', sans-serif;
  --zrr-font-body:      'Inter', sans-serif;
  --zrr-font-mono:      'IBM Plex Mono', monospace;

  /* Spacing */
  --zrr-container-max:  1200px;
  --zrr-section-pad:    80px;
  --zrr-section-pad-sm: 48px;

  /* Nav height */
  --zrr-nav-height: 64px;
}

/* ─── Reset ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--zrr-font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--zrr-fg-light-primary);
  background: var(--zrr-bg-dark);
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; }
table { border-collapse: collapse; }

/* ─── Container ──────────────────────────────────────────────── */
.zrr-container {
  max-width: var(--zrr-container-max);
  margin: 0 auto;
  padding: 0 32px;
}
@media (max-width: 600px) {
  .zrr-container { padding: 0 20px; }
}

/* ─── Typography ─────────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--zrr-font-heading);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.125rem; }

.zrr-eyebrow {
  font-family: var(--zrr-font-mono);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  display: block;
  margin-bottom: 16px;
}

.zrr-mono {
  font-family: var(--zrr-font-mono);
}

/* ─── Section backgrounds ────────────────────────────────────── */
.zrr-section--dark {
  background: var(--zrr-bg-dark);
  color: var(--zrr-fg-dark-primary);
}
.zrr-section--dark-alt {
  background: var(--zrr-bg-dark-alt);
  color: var(--zrr-fg-dark-primary);
}
.zrr-section--dark-card {
  background: var(--zrr-bg-dark-card);
  color: var(--zrr-fg-dark-primary);
}
.zrr-section--light {
  background: var(--zrr-bg-light);
  color: var(--zrr-fg-light-primary);
}
.zrr-section--white {
  background: var(--zrr-bg-white);
  color: var(--zrr-fg-light-primary);
}

/* ─── Section wrapper ────────────────────────────────────────── */
.zrr-section {
  padding: var(--zrr-section-pad) 0;
}
.zrr-section--sm {
  padding: var(--zrr-section-pad-sm) 0;
}

/* ─── Buttons ────────────────────────────────────────────────── */
.zrr-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--zrr-font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 10px 24px;
  border-radius: 2px;
  border: 2px solid transparent;
  transition: background 0.18s, border-color 0.18s, color 0.18s, opacity 0.18s;
  white-space: nowrap;
  text-decoration: none;
  line-height: 1.4;
}
.zrr-btn--primary {
  background: var(--zrr-accent-decorative);
  border-color: var(--zrr-accent-decorative);
  color: var(--zrr-bg-dark);
}
.zrr-btn--primary:hover { background: #00e0b9; border-color: #00e0b9; }

.zrr-btn--outline-dark {
  background: transparent;
  border-color: rgba(0,201,167,0.6);
  color: var(--zrr-accent-aa-dark);
}
.zrr-btn--outline-dark:hover {
  border-color: var(--zrr-accent-aa-dark);
  background: rgba(0,201,167,0.08);
}

.zrr-btn--outline-light {
  background: transparent;
  border-color: var(--zrr-accent-aa-light);
  color: var(--zrr-accent-aa-light);
}
.zrr-btn--outline-light:hover {
  background: rgba(0,122,102,0.07);
}

.zrr-btn--ghost-dark {
  background: transparent;
  border-color: transparent;
  color: var(--zrr-fg-dark-secondary);
}
.zrr-btn--ghost-dark:hover { color: var(--zrr-fg-dark-primary); }

.zrr-btn--mono-link {
  background: transparent;
  border-color: transparent;
  padding: 6px 0;
  color: var(--zrr-accent-aa-dark);
  font-family: var(--zrr-font-mono);
  font-size: 0.8125rem;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.zrr-section--light .zrr-btn--mono-link,
.zrr-section--white .zrr-btn--mono-link {
  color: var(--zrr-accent-aa-light);
}

/* ─── Nav base ───────────────────────────────────────────────── */
.zrr-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--zrr-nav-height);
  display: flex;
  align-items: center;
  background: transparent;
  transition: background 0.22s, box-shadow 0.22s;
}
.zrr-nav--scrolled {
  background: var(--zrr-bg-dark);
  box-shadow: 0 1px 0 var(--zrr-border-dark);
}
/* Light-top pages: nav always solid dark */
body.zrr-page--light-top .zrr-nav {
  background: var(--zrr-bg-dark);
  box-shadow: 0 1px 0 var(--zrr-border-dark);
}

.zrr-nav__inner {
  max-width: var(--zrr-container-max);
  margin: 0 auto;
  padding: 0 32px;
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0;
}

.zrr-nav__logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}
.zrr-nav__logo img {
  height: 32px;
  width: auto;
  max-width: 180px;
}

.zrr-nav__links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0 auto 0 40px;
}
.zrr-nav__link {
  font-family: var(--zrr-font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--zrr-fg-dark-secondary);
  padding: 6px 12px;
  border-radius: 2px;
  transition: color 0.15s, background 0.15s;
}
.zrr-nav__link:hover {
  color: var(--zrr-fg-dark-primary);
  background: rgba(255,255,255,0.05);
}
.zrr-nav__link.zrr-nav__link--active {
  color: var(--zrr-fg-dark-primary);
}

.zrr-nav__cta-group {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.zrr-nav__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: transparent;
  border: none;
  cursor: pointer;
  margin-left: auto;
}
.zrr-nav__hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--zrr-fg-dark-primary);
  transition: transform 0.22s, opacity 0.22s;
}

.zrr-nav__mobile-menu {
  display: none;
  position: absolute;
  top: var(--zrr-nav-height);
  left: 0;
  right: 0;
  background: var(--zrr-bg-dark);
  border-top: 1px solid var(--zrr-border-dark);
  padding: 16px 32px 24px;
  flex-direction: column;
  gap: 4px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}
.zrr-nav__mobile-menu.is-open {
  display: flex;
}
.zrr-nav__mobile-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--zrr-fg-dark-secondary);
  padding: 10px 0;
  border-bottom: 1px solid var(--zrr-border-dark);
  transition: color 0.15s;
}
.zrr-nav__mobile-link:hover { color: var(--zrr-fg-dark-primary); }
.zrr-nav__mobile-cta-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 16px;
}

@media (max-width: 960px) {
  .zrr-nav__links, .zrr-nav__cta-group { display: none; }
  .zrr-nav__hamburger { display: flex; }
}
@media (max-width: 600px) {
  .zrr-nav__inner { padding: 0 20px; }
}

/* ─── Footer ─────────────────────────────────────────────────── */
.zrr-footer {
  background: var(--zrr-bg-dark);
  border-top: 1px solid var(--zrr-border-dark);
  padding: 64px 0 32px;
}
.zrr-footer__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 48px;
}
.zrr-footer__col-title {
  font-family: var(--zrr-font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--zrr-accent-aa-dark);
  margin-bottom: 20px;
}
.zrr-footer__links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.zrr-footer__link {
  font-size: 0.875rem;
  color: var(--zrr-fg-dark-secondary);
  transition: color 0.15s;
}
.zrr-footer__link:hover { color: var(--zrr-fg-dark-primary); }
.zrr-footer__bottom {
  border-top: 1px solid var(--zrr-border-dark);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.zrr-footer__copy {
  font-family: var(--zrr-font-mono);
  font-size: 0.75rem;
  color: var(--zrr-fg-dark-secondary);
  line-height: 1.6;
}
.zrr-footer__cookie-link {
  font-family: var(--zrr-font-mono);
  font-size: 0.75rem;
  color: var(--zrr-fg-dark-secondary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.15s;
}
.zrr-footer__cookie-link:hover { color: var(--zrr-fg-dark-primary); }

@media (max-width: 760px) {
  .zrr-footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 480px) {
  .zrr-footer__grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

/* ─── Cookie Banner ──────────────────────────────────────────── */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: var(--zrr-bg-dark-card);
  border-top: 1px solid var(--zrr-border-dark);
  padding: 16px 0;
}
.cookie-banner__inner {
  max-width: var(--zrr-container-max);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.cookie-banner__text {
  flex: 1;
  font-size: 0.875rem;
  color: var(--zrr-fg-dark-secondary);
  min-width: 240px;
}
.cookie-banner__text a {
  color: var(--zrr-accent-aa-dark);
  text-decoration: underline;
}
.cookie-banner__actions {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}
.cookie-banner__btn {
  font-family: var(--zrr-font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 8px 20px;
  border-radius: 2px;
  border: 1px solid var(--zrr-border-dark);
  transition: background 0.15s, border-color 0.15s;
}
.cookie-banner__btn--primary {
  background: var(--zrr-accent-decorative);
  border-color: var(--zrr-accent-decorative);
  color: var(--zrr-bg-dark);
}
.cookie-banner__btn--primary:hover { background: #00e0b9; }

/* ─── Fade-in animations ─────────────────────────────────────── */
.zrr-fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.zrr-fade-in.visible {
  opacity: 1;
  transform: none;
}

/* ─── Utility ────────────────────────────────────────────────── */
.zrr-sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.zrr-text-mono {
  font-family: var(--zrr-font-mono);
}
.zrr-text-accent-dark  { color: var(--zrr-accent-aa-dark); }
.zrr-text-accent-light { color: var(--zrr-accent-aa-light); }