/* ==========================================================================
   Zyncs — Core styles
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--t-body);
  line-height: 1.65;
  color: var(--c-soft-white);
  background: var(--c-navy);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Atmospheric base layer: faint grain + fixed glow field */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(255,255,255,0.016) 1px, transparent 1px) 0 0 / 66px 66px,
    linear-gradient(90deg, rgba(255,255,255,0.016) 1px, transparent 1px) 0 0 / 66px 66px,
    radial-gradient(60rem 60rem at 80% -12%, rgba(34,221,242,0.07), transparent 60%),
    radial-gradient(55rem 55rem at 4% 8%, rgba(0,224,164,0.08), transparent 58%),
    radial-gradient(46rem 46rem at 50% 122%, rgba(255,159,67,0.07), transparent 60%);
}
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

main, header, footer { position: relative; z-index: 1; }

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul { margin: 0; padding: 0; list-style: none; }

::selection { background: var(--c-teal); color: var(--c-black); }

:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---- Typography ------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--c-white);
  margin: 0;
  line-height: 1.06;
  letter-spacing: -0.02em;
  font-weight: 700;
  text-wrap: balance;
}
p { margin: 0; }
strong { color: var(--c-white); font-weight: 600; }

/* Highlighted headline word: teal type with a warm→cool underline.
   The underline itself carries the warm×cool brand idea (no gradient-fill text). */
.gradient-text {
  color: var(--c-teal);
  background-image: var(--g-warm-cool);
  background-repeat: no-repeat;
  background-position: 0 92%;
  background-size: 100% 0.1em;
  padding-bottom: 0.04em;
}

/* ---- Layout ----------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}
.container--sm { max-width: var(--container-sm); }

section { padding-block: var(--section-y); position: relative; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-teal);
  margin-bottom: 1.1rem;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  margin-right: 0.7em;
  background: var(--c-teal);
  box-shadow: 0 0 8px var(--c-teal);
}

.section-head { max-width: 720px; }
.section-head--center { margin-inline: auto; text-align: center; }
.section-head h2 { font-size: var(--t-section); }
.section-head .lead { margin-top: 1.15rem; color: var(--c-slate); font-size: var(--t-lead); }

.lead { font-size: var(--t-lead); color: var(--c-slate); line-height: 1.55; }
.muted { color: var(--c-slate); }

/* ==========================================================================
   Navbar
   ========================================================================== */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), backdrop-filter var(--dur) var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(3, 11, 20, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--c-hairline);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: 76px;
}
.brand { display: inline-flex; align-items: center; gap: 0.6rem; flex-shrink: 0; }
.brand__mark { width: 34px; height: 34px; }
.brand__word {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  letter-spacing: -0.02em;
  color: var(--c-white);
}
.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.2vw, 2.1rem);
}
.nav__links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--c-soft-white);
  position: relative;
  padding: 0.4rem 0;
  transition: color var(--dur) var(--ease);
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--g-brand);
  border-radius: 2px;
  transition: width var(--dur) var(--ease);
}
.nav__links a:hover { color: var(--c-white); }
.nav__links a:hover::after,
.nav__links a[aria-current="page"]::after { width: 100%; }
.nav__links a[aria-current="page"] { color: var(--c-white); }
/* CTA inside the link list is for the mobile menu only */
.nav__links .btn { display: none; }
/* Lock background scroll while the mobile menu is open */
body.menu-open { overflow: hidden; }
.nav__right { display: flex; align-items: center; gap: 1rem; }

.nav__toggle {
  display: none;
  width: 44px; height: 44px;
  background: transparent;
  border: 1px solid var(--c-hairline-2);
  border-radius: var(--r-sm);
  position: relative;
}
.nav__toggle span,
.nav__toggle span::before,
.nav__toggle span::after {
  content: "";
  position: absolute;
  left: 50%; top: 50%;
  width: 18px; height: 2px;
  background: var(--c-white);
  border-radius: 2px;
  transform: translate(-50%, -50%);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.nav__toggle span::before { transform: translate(-50%, -7px); }
.nav__toggle span::after  { transform: translate(-50%, 5px); }
body.menu-open .nav__toggle span { background: transparent; }
body.menu-open .nav__toggle span::before { transform: translate(-50%, -50%) rotate(45deg); }
body.menu-open .nav__toggle span::after  { transform: translate(-50%, -50%) rotate(-45deg); }

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.975rem;
  line-height: 1;
  padding: 14px 24px;
  border-radius: var(--r-pill);
  border: 1px solid transparent;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease),
              background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
  white-space: nowrap;
}
.btn svg { width: 18px; height: 18px; }

.btn--primary {
  background: var(--g-brand);
  color: var(--c-black);
  font-weight: 700;
  box-shadow: 0 10px 30px -12px rgba(0, 224, 164, 0.6);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-cta);
  filter: brightness(1.07);
}
.btn--secondary {
  background: transparent;
  color: var(--c-white);
  border-color: rgba(255, 255, 255, 0.22);
}
.btn--secondary:hover {
  border-color: var(--c-teal);
  box-shadow: 0 0 0 1px var(--c-border-teal), 0 0 24px -6px var(--c-glow-teal);
  transform: translateY(-2px);
}
.btn--ghost { padding-inline: 0; color: var(--c-teal); }
.btn--ghost:hover { gap: 0.85rem; }
.btn--lg { padding: 17px 30px; font-size: 1.05rem; }

.btn-row { display: flex; flex-wrap: wrap; gap: 0.9rem; align-items: center; }

/* ==========================================================================
   Cards
   ========================================================================== */
.card {
  position: relative;
  background: var(--g-card);
  border: 1px solid var(--c-hairline);
  border-radius: var(--r-lg);
  padding: clamp(1.4rem, 1rem + 1vw, 2rem);
  overflow: hidden;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.card::after {     /* top sheen line */
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-border-teal), transparent);
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--c-border-teal);
  box-shadow: var(--shadow-card), 0 0 30px -10px var(--c-glow-teal);
}
.card:hover::after { opacity: 1; }
/* Crop-mark corner — blueprint/engineered detail unique to Zyncs cards */
.card::before {
  content: "";
  position: absolute;
  top: 11px; right: 11px;
  width: 12px; height: 12px;
  border-top: 1.5px solid var(--c-border-teal);
  border-right: 1.5px solid var(--c-border-teal);
  opacity: 0.65;
  transition: border-color var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.card:hover::before { border-color: var(--c-teal); opacity: 1; }

.card__icon {
  width: 48px; height: 48px;
  display: grid; place-items: center;
  border-radius: var(--r-sm);
  background: rgba(0, 224, 164, 0.08);
  border: 1px solid var(--c-border-teal);
  color: var(--c-teal);
  margin-bottom: 1.15rem;
}
.card__icon svg { width: 24px; height: 24px; }
.card h3 { font-size: var(--t-card); margin-bottom: 0.6rem; }
.card p { color: var(--c-slate); font-size: 1rem; line-height: 1.6; }
.card__tag {
  display: inline-block;
  margin-top: 1rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--c-teal);
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--c-border-teal);
  border-radius: var(--r-pill);
}

/* warning-flavored card (problem sections) */
.card--warn .card__icon {
  background: rgba(255, 90, 95, 0.08);
  border-color: rgba(255, 90, 95, 0.32);
  color: var(--c-red);
}
.card--warn:hover { border-color: rgba(255, 90, 95, 0.32); box-shadow: var(--shadow-card), 0 0 30px -10px rgba(255,90,95,0.22); }

.grid { display: grid; gap: var(--gap); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

/* ==========================================================================
   Split section (copy + visual)
   ========================================================================== */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 1rem + 4vw, 5rem);
  align-items: center;
}
.split--reverse .split__visual { order: -1; }
.split__copy .feature-list { margin-top: 1.6rem; }

.feature-list { display: grid; gap: 0.9rem; }
.feature-list li {
  display: flex;
  gap: 0.8rem;
  align-items: flex-start;
  color: var(--c-soft-white);
  font-size: 1.02rem;
}
.feature-list li::before {
  content: "";
  flex-shrink: 0;
  width: 22px; height: 22px;
  margin-top: 1px;
  border-radius: 6px;
  background:
    var(--g-brand);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round' d='M5 12.5l4.5 4.5L19 7'/%3E%3C/svg%3E") center / 16px no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round' d='M5 12.5l4.5 4.5L19 7'/%3E%3C/svg%3E") center / 16px no-repeat;
}

/* ==========================================================================
   CTA band
   ========================================================================== */
.cta-card {
  position: relative;
  text-align: center;
  border: 1px solid var(--c-border-teal);
  border-radius: var(--r-xl);
  padding: clamp(2.5rem, 1.5rem + 4vw, 5rem) clamp(1.5rem, 1rem + 3vw, 4rem);
  background:
    radial-gradient(70% 120% at 50% 0%, rgba(0,224,164,0.14), transparent 60%),
    var(--g-card);
  overflow: hidden;
}
.cta-card::before {
  content: "";
  position: absolute;
  width: 60%; height: 200%;
  left: 50%; top: -60%;
  transform: translateX(-50%);
  background: var(--g-glow);
  opacity: 0.6;
  pointer-events: none;
}
.cta-card > * { position: relative; }
.cta-card h2 { font-size: var(--t-section); max-width: 18ch; margin-inline: auto; }
.cta-card p { margin: 1.1rem auto 1.8rem; max-width: 56ch; color: var(--c-slate); font-size: var(--t-lead); }

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background: var(--c-graphite);
  border-top: 1px solid var(--c-hairline);
  padding-block: clamp(3rem, 2rem + 3vw, 5rem) 2rem;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: 2.5rem;
}
.footer__brand p { color: var(--c-slate); font-size: 0.95rem; margin-top: 1rem; max-width: 34ch; }
.footer__col h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-slate);
  margin-bottom: 1.1rem;
}
.footer__col a {
  display: block;
  color: var(--c-soft-white);
  font-size: 0.95rem;
  padding: 0.35rem 0;
  transition: color var(--dur) var(--ease);
}
.footer__col a:hover { color: var(--c-teal); }
.footer__bar {
  margin-top: 3rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--c-hairline);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  color: var(--c-slate);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.02em;
}

/* ==========================================================================
   Scroll-reveal
   ========================================================================== */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
  transition-delay: var(--reveal-delay, 0s);
  will-change: opacity, transform;
}
[data-reveal].is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
  [data-reveal] { opacity: 1; transform: none; }
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 980px) {
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 860px) {
  .nav__links {
    position: fixed;
    inset: 76px 0 0 0;            /* full-height panel: fully covers content behind */
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(3, 11, 20, 0.98);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    padding: 0.5rem var(--pad-x) 2rem;
    overflow-y: auto;
    transform: translateY(-110%);
    transition: transform var(--dur) var(--ease);
  }
  body.menu-open .nav__links { transform: translateY(0); }
  .nav__links a { padding: 0.95rem 0; border-bottom: 1px solid var(--c-hairline); font-size: 1.05rem; }
  .nav__links a::after { display: none; }
  .nav__toggle { display: inline-flex; align-items: center; justify-content: center; }
  .nav__right .btn { display: none; }
  .nav__links .btn { display: inline-flex; margin-top: 1.1rem; }
}

@media (max-width: 760px) {
  .split { grid-template-columns: 1fr; gap: 2.5rem; }
  .split--reverse .split__visual { order: 0; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .grid--3.grid--keep-2,
  .grid--4.grid--keep-2 { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 761px) and (max-width: 1040px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
}

/* ==========================================================================
   Design-language utilities (warm×cool + engineered/operational details)
   ========================================================================== */

/* Section index inside the mono eyebrow, e.g. "01 / PLATFORM MODULES" */
.eyebrow b { color: var(--c-white); font-weight: 600; }
.eyebrow .sep { color: var(--c-teal); opacity: 0.6; margin: 0 0.5em; }

/* Warm eyebrow — used on hospitality / guest-facing moments */
.eyebrow--warm { color: var(--c-warm); }
.eyebrow--warm::before { background: var(--c-warm); box-shadow: 0 0 8px var(--c-warm); }

/* Warm "human" card variant (Guest Ordering, Loyalty, people moments) */
.card--human .card__icon {
  background: rgba(255, 184, 77, 0.09);
  border-color: var(--c-border-warm);
  color: var(--c-warm);
}
.card--human::before { border-color: var(--c-border-warm); }
.card--human:hover {
  border-color: var(--c-border-warm);
  box-shadow: var(--shadow-card), 0 0 30px -10px var(--c-glow-warm);
}
.card--human:hover::before { border-color: var(--c-warm); }
.card--human:hover::after { background: linear-gradient(90deg, transparent, var(--c-border-warm), transparent); }

/* Live "systems" status chip — mono, with a pulsing node */
.status {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--c-slate);
}
.status .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--c-emerald);
  box-shadow: 0 0 8px var(--c-emerald);
  animation: pulse 2.4s ease-in-out infinite;
}