/* ==========================================================================
   CYANAQ Systems — global styles: base, layout, header, footer, buttons
   ========================================================================== */

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  color: var(--c-muted);
  background: var(--c-black);
  overflow-x: hidden;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  color: var(--c-white);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

h1 { font-size: var(--fs-h1); letter-spacing: -0.035em; }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); line-height: 1.25; }

p { text-wrap: pretty; }

strong { color: var(--c-white); font-weight: 600; }

a { text-decoration-color: rgba(0, 229, 255, 0.4); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--c-cyan); }

:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection { background: rgba(100, 27, 255, 0.6); color: #fff; }

.sr-only {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 0.7rem 1.1rem;
  background: var(--c-white);
  color: var(--c-black);
  border-radius: var(--r-sm);
  font-weight: 600;
  transform: translateY(-200%);
  transition: transform var(--t-fast) var(--ease-out);
}
.skip-link:focus { transform: none; }

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: calc(var(--container) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--narrow { max-width: calc(var(--container-narrow) + var(--gutter) * 2); }

.section { position: relative; padding-block: var(--section-y); }
.section--tight { padding-block: calc(var(--section-y) * 0.6); }
.section--flush-top { padding-top: 0; }
.section--glow::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(60% 50% at 85% 0%, rgba(100, 27, 255, 0.16), transparent 70%),
    radial-gradient(50% 45% at 5% 100%, rgba(22, 77, 255, 0.14), transparent 70%);
}
.section--band {
  background: linear-gradient(180deg, var(--c-navy) 0%, var(--c-black) 100%);
  border-block: 1px solid var(--line);
}
.section > .container { position: relative; }

.section-head { max-width: 760px; margin-bottom: clamp(2rem, 1.5rem + 2.5vw, 4rem); }
.section-head--center { margin-inline: auto; text-align: center; }
.section-head .lead { margin-top: 1.25rem; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.1rem;
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-cyan);
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--grad-brand);
}
.section-head--center .eyebrow::after {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--grad-brand);
}

.lead { font-size: var(--fs-lg); line-height: 1.65; color: var(--c-muted); max-width: 62ch; }
.section-head--center .lead { margin-inline: auto; }

.gradient-text {
  background: var(--grad-text);
  background-size: 200% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  padding-bottom: 0.08em;
}

.grid { display: grid; gap: clamp(1rem, 0.6rem + 1.4vw, 1.75rem); }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.stack > * + * { margin-top: 1rem; }

.prose { max-width: 70ch; }
.prose h2 { font-size: var(--fs-h3); margin: 2.5rem 0 1rem; }
.prose h3 { font-size: var(--fs-h4); margin: 2rem 0 0.75rem; }
.prose p + p, .prose ul + p, .prose p + ul { margin-top: 1rem; }
.prose ul { padding-left: 1.2rem; }
.prose li { margin-top: 0.4rem; }
.prose li::marker { color: var(--c-cyan); }

/* ---------- Buttons ---------- */
.btn {
  --btn-pad-y: 0.95rem;
  --btn-pad-x: 1.6rem;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: var(--btn-pad-y) var(--btn-pad-x);
  border-radius: var(--r-pill);
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.005em;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  isolation: isolate;
  overflow: hidden;
  transition: transform var(--t-med) var(--ease-out), box-shadow var(--t-med) var(--ease-out), border-color var(--t-fast), background var(--t-fast);
  will-change: transform;
}
.btn .icon { width: 1.1em; height: 1.1em; transition: transform var(--t-med) var(--ease-out); }
.btn:hover .icon--arrow { transform: translateX(4px); }

.btn--primary {
  color: #fff;
  background: linear-gradient(110deg, var(--c-blue), var(--c-violet) 60%, var(--c-magenta));
  background-size: 140% 100%;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.35) inset, 0 12px 34px -10px rgba(100, 27, 255, 0.7);
}
.btn--primary:hover {
  background-position: 100% 0;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.35) inset, 0 16px 44px -8px rgba(0, 229, 255, 0.45);
  transform: translateY(-2px);
}
/* light-follow shine */
.btn--primary::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(120px circle at var(--bx, 50%) var(--by, 50%), rgba(255, 255, 255, 0.35), transparent 70%);
  opacity: 0;
  transition: opacity var(--t-med);
}
.btn--primary:hover::after { opacity: 1; }

.btn--ghost {
  color: var(--c-white);
  background: var(--surface-1);
  border: 1px solid var(--line-strong);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover {
  border-color: rgba(0, 229, 255, 0.55);
  background: rgba(0, 229, 255, 0.07);
  transform: translateY(-2px);
}

.btn--sm { --btn-pad-y: 0.65rem; --btn-pad-x: 1.15rem; font-size: 0.875rem; }
.btn--lg { --btn-pad-y: 1.1rem; --btn-pad-x: 2rem; font-size: 1.025rem; }
.btn[disabled], .btn[aria-disabled="true"] { opacity: 0.6; pointer-events: none; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.925rem;
  color: var(--c-white);
  text-decoration: none;
}
.link-arrow .icon { width: 1em; height: 1em; color: var(--c-cyan); transition: transform var(--t-med) var(--ease-out); }
.link-arrow:hover .icon { transform: translateX(4px); }

.icon { display: inline-block; width: 1.25em; height: 1.25em; flex: none; stroke: currentColor; }

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background var(--t-med) var(--ease-out), border-color var(--t-med), backdrop-filter var(--t-med), height var(--t-med) var(--ease-out);
}
.site-header.is-scrolled,
.site-header.is-menu-open {
  background: rgba(3, 4, 11, 0.78);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: var(--line);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand { display: inline-flex; align-items: center; flex: none; line-height: 0; border-radius: 8px; }
.brand img { height: 66px; width: auto; transition: transform var(--t-med) var(--ease-out), filter var(--t-med); }
.brand:hover img { transform: scale(1.04); filter: drop-shadow(0 0 18px rgba(22, 77, 255, 0.6)); }

.nav { display: flex; align-items: center; gap: 0.5rem; }
.nav__list { display: flex; align-items: center; gap: 0.15rem; list-style: none; margin: 0; padding: 0; }
.nav__item { position: relative; }
.nav__link,
.nav__trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.65rem 0.85rem;
  border-radius: var(--r-pill);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--c-muted);
  text-decoration: none;
  transition: color var(--t-fast), background var(--t-fast);
}
.nav__link:hover,
.nav__trigger:hover,
.nav__item.is-open > .nav__trigger { color: var(--c-white); background: var(--surface-2); }
.nav__link[aria-current="page"],
.nav__trigger[data-current="true"] { color: var(--c-white); }
.nav__link[aria-current="page"]::after,
.nav__trigger[data-current="true"]::after {
  content: "";
  width: 5px;
  height: 5px;
  margin-left: 2px;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 10px var(--c-cyan);
}
.nav__trigger .icon { width: 0.95em; height: 0.95em; transition: transform var(--t-med) var(--ease-out); }
.nav__item.is-open > .nav__trigger .icon { transform: rotate(180deg); }

.menu {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  z-index: 20;
  width: max-content;
  max-width: min(92vw, 760px);
  padding: 0.75rem;
  background: rgba(8, 12, 30, 0.96);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-lg);
  box-shadow: 0 40px 80px -20px rgba(0, 0, 0, 0.9), 0 0 0 1px rgba(100, 27, 255, 0.08);
  backdrop-filter: blur(20px);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, 10px) scale(0.98);
  transform-origin: top center;
  transition: opacity var(--t-med) var(--ease-out), transform var(--t-med) var(--ease-out), visibility 0s linear var(--t-med);
}
/* bridge so the pointer can travel from trigger to menu */
.menu::before { content: ""; position: absolute; inset: -16px 0 auto 0; height: 16px; }
.nav__item.is-open > .menu,
html:not(.js) .nav__item:hover > .menu,
html:not(.js) .nav__item:focus-within > .menu {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0) scale(1);
  transition-delay: 0s;
}
.menu--wide { width: 720px; }
.menu--narrow { width: 380px; }
.menu__grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.15rem; }
.menu--narrow .menu__grid { grid-template-columns: 1fr; }
.menu__link {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
  padding: 0.8rem 0.9rem;
  border-radius: var(--r-md);
  text-decoration: none;
  transition: background var(--t-fast);
}
.menu__link:hover,
.menu__link:focus-visible { background: var(--surface-2); }
.menu__icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: none;
  border-radius: 11px;
  color: var(--c-cyan);
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.12), rgba(100, 27, 255, 0.16));
  border: 1px solid rgba(0, 229, 255, 0.18);
}
.menu__icon .icon { width: 19px; height: 19px; }
.menu__title { display: block; font-family: var(--font-display); font-size: 0.92rem; font-weight: 600; color: var(--c-white); line-height: 1.3; }
.menu__desc { display: block; margin-top: 0.15rem; font-size: 0.8125rem; line-height: 1.45; color: var(--c-muted-2); }
.menu__foot { margin-top: 0.5rem; padding: 0.7rem 0.9rem 0.3rem; border-top: 1px solid var(--line); }

.nav-toggle {
  display: none;
  position: relative;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: var(--surface-1);
  color: var(--c-white);
}
.nav-toggle__bars { position: absolute; inset: 0; display: grid; place-content: center; gap: 5px; }
.nav-toggle__bars span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--t-med) var(--ease-out), opacity var(--t-fast);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* Mobile navigation panel */
.mobile-nav {
  position: fixed;
  inset: var(--header-h) 0 0 0;
  z-index: 90;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 1rem var(--gutter) 3rem;
  background: rgba(3, 4, 11, 0.97);
  backdrop-filter: blur(24px);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-12px);
  transition: opacity var(--t-med) var(--ease-out), transform var(--t-med) var(--ease-out), visibility 0s linear var(--t-med);
}
.mobile-nav.is-open { opacity: 1; visibility: visible; transform: none; transition-delay: 0s; }
.mobile-nav__list { list-style: none; margin: 0; padding: 0; }
.mobile-nav__list > li { border-bottom: 1px solid var(--line); }
.mobile-nav__link,
.mobile-nav__summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1.05rem 0.25rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--c-white);
  text-decoration: none;
  text-align: left;
  list-style: none;
  cursor: pointer;
}
.mobile-nav__summary::-webkit-details-marker { display: none; }
.mobile-nav__summary .icon { width: 1em; height: 1em; transition: transform var(--t-med) var(--ease-out); }
details[open] > .mobile-nav__summary .icon { transform: rotate(180deg); }
.mobile-nav__sub { list-style: none; margin: 0; padding: 0 0 1rem 0.25rem; display: grid; gap: 0.1rem; }
.mobile-nav__sub a {
  display: block;
  padding: 0.6rem 0.25rem;
  font-size: 1rem;
  color: var(--c-muted);
  text-decoration: none;
}
.mobile-nav__sub a:hover { color: var(--c-white); }
.mobile-nav__cta { margin-top: 1.75rem; }
.mobile-nav__cta .btn { width: 100%; }
body.nav-locked { overflow: hidden; }

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  margin-top: 0;
  padding: clamp(3.5rem, 6vw, 6rem) 0 2rem;
  background: linear-gradient(180deg, var(--c-black), var(--c-navy) 40%, var(--c-black));
  border-top: 1px solid var(--line);
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: var(--grad-brand);
  opacity: 0.6;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: clamp(2rem, 4vw, 4rem);
}
.footer__brand img { height: 130px; width: auto; margin: -14px 0 0 -10px; }
.footer__brand p { margin-top: 0.75rem; max-width: 38ch; font-size: var(--fs-sm); }
.footer__col h2 {
  margin-bottom: 1.1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-white);
}
.footer__col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.6rem; }
.footer__col a { font-size: var(--fs-sm); color: var(--c-muted); text-decoration: none; transition: color var(--t-fast); }
.footer__col a:hover { color: var(--c-white); }
.footer__contact { margin-top: 1.5rem; display: grid; gap: 0.5rem; font-size: var(--fs-sm); }
.footer__contact span { display: flex; align-items: center; gap: 0.6rem; }
.footer__contact .icon { width: 1.05rem; height: 1.05rem; color: var(--c-cyan); }
.footer__contact a { color: var(--c-white); text-decoration: none; }
.footer__contact a:hover { text-decoration: underline; }
.socials { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-top: 1.25rem; }
.socials a {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  color: var(--c-muted);
  transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast), transform var(--t-med) var(--ease-out);
}
.socials a:hover { color: #fff; border-color: var(--c-cyan); background: rgba(0, 229, 255, 0.08); transform: translateY(-3px); }
.socials .icon { width: 18px; height: 18px; }
.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
  margin-top: clamp(2.5rem, 5vw, 4rem);
  padding-top: 1.75rem;
  border-top: 1px solid var(--line);
  font-size: var(--fs-xs);
  color: var(--c-muted-2);
}
.footer__legal { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; list-style: none; margin: 0; padding: 0; }
.footer__legal a { color: var(--c-muted); text-decoration: none; }
.footer__legal a:hover { color: var(--c-white); }

/* ---------- Back to top ---------- */
.to-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 80;
  display: grid;
  place-items: center;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  color: #fff;
  background: rgba(10, 14, 34, 0.85);
  border: 1px solid var(--line-strong);
  backdrop-filter: blur(10px);
  box-shadow: 0 12px 30px -8px rgba(0, 0, 0, 0.8);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--t-med), transform var(--t-med) var(--ease-out), visibility 0s linear var(--t-med), border-color var(--t-fast);
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: none; transition-delay: 0s; }
.to-top:hover { border-color: var(--c-cyan); }
.to-top .icon { width: 20px; height: 20px; }

/* Scroll progress */
.scroll-progress {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 110;
  height: 2px;
  transform-origin: 0 50%;
  transform: scaleX(0);
  background: var(--grad-brand);
  pointer-events: none;
}

main:focus { outline: none; }
a:not([href]) { cursor: default; text-decoration: none; }

/* Hide the social row entirely until at least one URL is configured */
.socials:not(:has(a:not([hidden]))) { display: none; }