/* ============================================================
   VibesAI LLC — black & white system
   ============================================================ */

:root {
  --ink: #000000;
  --paper: #ffffff;
  --smoke: #0a0a0a;
  --ash: #121212;
  --line: rgba(255, 255, 255, 0.12);
  --line-strong: rgba(255, 255, 255, 0.28);
  --muted: rgba(255, 255, 255, 0.56);
  --muted-dim: rgba(255, 255, 255, 0.38);
  --header-h: 72px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  background: var(--ink);
  color: var(--paper);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection {
  background: var(--paper);
  color: var(--ink);
}

.mono {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas,
    monospace;
}

/* ---------- shared type ---------- */

.eyebrow {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.72rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--muted-dim);
  margin-bottom: 1.25rem;
}

.section-title {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.02;
}

.lead-muted {
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.75;
}

.rule {
  height: 1px;
  background: var(--line);
  border: 0;
  opacity: 1;
  margin: 0;
}

/* ---------- sticky header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(18px) saturate(120%);
  -webkit-backdrop-filter: blur(18px) saturate(120%);
  border-bottom: 1px solid var(--line);
  transition: border-color 0.3s ease, background 0.3s ease;
}

.site-header.is-scrolled {
  background: rgba(0, 0, 0, 0.9);
  border-bottom-color: var(--line-strong);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  text-decoration: none;
  color: var(--paper);
}

.brand__mark {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  border: 1px solid var(--line);
  object-fit: cover;
  background: var(--ink);
}

.brand__text {
  font-weight: 800;
  letter-spacing: 0.16em;
  font-size: 0.86rem;
  text-transform: uppercase;
}

.nav-link-bw {
  position: relative;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.35rem 0;
  transition: color 0.25s ease;
}

.nav-link-bw::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 1px;
  width: 0;
  background: var(--paper);
  transition: width 0.28s ease;
}

.nav-link-bw:hover,
.nav-link-bw:focus-visible {
  color: var(--paper);
}

.nav-link-bw:hover::after,
.nav-link-bw:focus-visible::after {
  width: 100%;
}

/* buttons */

.btn-bw {
  --btn-bg: var(--paper);
  --btn-fg: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid var(--paper);
  border-radius: 999px;
  padding: 0.68rem 1.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.btn-bw:hover {
  transform: translateY(-2px);
  background: transparent;
  color: var(--paper);
}

.btn-bw--ghost {
  background: transparent;
  color: var(--paper);
  border-color: var(--line-strong);
}

.btn-bw--ghost:hover {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
}

/* ---------- hero ---------- */

.hero {
  position: relative;
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 6rem 0;
  border-bottom: 1px solid var(--line);
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 76px 76px;
  mask-image: radial-gradient(ellipse 80% 70% at 60% 50%, #000 15%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 60% 50%, #000 15%, transparent 80%);
  opacity: 0.45;
}

.hero__glow {
  position: absolute;
  left: 72%;
  top: 50%;
  width: min(760px, 85vw);
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  background: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.1) 0%,
    rgba(255, 255, 255, 0.03) 40%,
    transparent 68%
  );
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 2;
}

.hero__copy .eyebrow {
  margin-bottom: 1.6rem;
}

.hero__art {
  display: flex;
  justify-content: center;
}

.hero__seal {
  width: min(300px, 62vw);
  aspect-ratio: 1;
  border-radius: 32px;
  border: 1px solid var(--line-strong);
  object-fit: cover;
  box-shadow: 0 0 0 12px rgba(255, 255, 255, 0.025),
    0 40px 100px rgba(0, 0, 0, 0.9);
  animation: float 7s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* the centerpiece wordmark */
.wordmark {
  font-family: "Space Grotesk", "Inter", -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  font-size: clamp(2.4rem, 5.6vw, 4.6rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -0.035em;
  color: var(--paper);
  text-transform: uppercase;
  margin: 0;
  text-shadow: 0 0 80px rgba(255, 255, 255, 0.18);
}

.wordmark__llc {
  display: block;
  font-size: clamp(0.75rem, 1.3vw, 1.05rem);
  font-weight: 300;
  letter-spacing: 0.58em;
  text-indent: 0.58em;
  margin-top: 1.1rem;
  color: rgba(255, 255, 255, 0.72);
}

.hero__sub {
  max-width: 52ch;
  margin: 2rem 0 0;
  color: var(--muted);
  font-size: 1.06rem;
  line-height: 1.75;
}

/* ---------- marquee strip ---------- */

.strip {
  border-bottom: 1px solid var(--line);
  background: var(--smoke);
  overflow: hidden;
  padding: 1.1rem 0;
}

.strip__track {
  display: flex;
  gap: 3.5rem;
  width: max-content;
  animation: slide 32s linear infinite;
  white-space: nowrap;
}

.strip__track span {
  font-size: 0.74rem;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--muted-dim);
}

@keyframes slide {
  to { transform: translateX(-50%); }
}

/* ---------- split containers ---------- */

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-bottom: 1px solid var(--line);
}

.split > * {
  padding: clamp(3rem, 7vw, 7rem) clamp(1.6rem, 5vw, 5rem);
}

.split__left {
  border-right: 1px solid var(--line);
}

.split--flip .split__left {
  order: 2;
  border-right: 0;
  border-left: 1px solid var(--line);
}

.split--dark {
  background: var(--smoke);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.stat {
  background: var(--ink);
  padding: 1.8rem 1.4rem;
}

.stat__num {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.stat__label {
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted-dim);
  margin-top: 0.4rem;
}

.check-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.check-list li {
  display: flex;
  gap: 1rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  line-height: 1.6;
}

.check-list li:first-child {
  border-top: 1px solid var(--line);
}

.check-list strong {
  color: var(--paper);
  display: block;
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.check-list .idx {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.7rem;
  color: var(--muted-dim);
  padding-top: 0.35rem;
  min-width: 2rem;
}

/* ---------- product cards ---------- */

.section {
  padding: clamp(4rem, 9vw, 8rem) 0;
  border-bottom: 1px solid var(--line);
}

.product {
  /* per-product brand accents, set by modifier classes below */
  --accent-a: #ffffff;
  --accent-b: #ffffff;
  --accent-soft: rgba(255, 255, 255, 0.1);

  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--smoke);
  border: 1px solid var(--line);
  padding: clamp(1.8rem, 3.5vw, 3rem);
  text-decoration: none;
  color: inherit;
  overflow: hidden;
  transition: transform 0.35s cubic-bezier(0.2, 0.8, 0.2, 1),
    border-color 0.35s ease, background 0.35s ease,
    box-shadow 0.35s ease;
}

/* brand bar across the top of each card */
.product::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(
    to right,
    var(--accent-a),
    var(--accent-b),
    var(--accent-c, var(--accent-b))
  );
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.product::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    600px circle at var(--mx, 50%) var(--my, 0%),
    var(--accent-soft),
    transparent 45%
  );
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
}

.product:hover {
  transform: translateY(-6px);
  border-color: var(--line-strong);
  background: var(--ash);
  box-shadow: 0 26px 70px -30px var(--accent-soft);
}

.product:hover::before {
  opacity: 1;
}

.product:hover::after {
  transform: scaleX(1);
}

/* Chrono Talk — purple */
.product--chrono {
  --accent-a: #2f0f4b;
  --accent-b: #4a148c;
  --accent-c: #8b5cf6; /* the brand purple lifted, so the bar reads on black */
  --accent-soft: rgba(122, 44, 200, 0.3);
}

/* EcoHelp — green */
.product--eco {
  --accent-a: #2ebf91;
  --accent-b: #93f9b9;
  --accent-soft: rgba(46, 191, 145, 0.24);
}

.product__tag {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.66rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted-dim);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.3rem 0.85rem;
  align-self: flex-start;
  transition: color 0.3s ease, border-color 0.3s ease;
}

.product:hover .product__tag {
  color: var(--paper);
  border-color: var(--accent-c, var(--accent-b));
}

.product__name {
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin: 1.6rem 0 0.5rem;
  background: linear-gradient(
    to bottom right,
    var(--accent-grad-a, var(--accent-a)),
    var(--accent-b)
  );
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* the deep end of the Chrono purple is unreadable as text — lift it */
.product--chrono .product__name {
  --accent-grad-a: #8b5cf6;
  --accent-b: #c4a2ff;
}

.product__domain {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.8rem;
  color: var(--muted-dim);
  margin-bottom: 1.2rem;
}

.product__desc {
  color: var(--muted);
  line-height: 1.75;
  flex-grow: 1;
}

.product__feats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.8rem 0;
}

.product__feats span {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.product:hover .product__feats span {
  background: var(--accent-soft);
  border-color: transparent;
  color: var(--paper);
}

.product__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--paper);
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
}

.product__cta .arrow {
  transition: transform 0.3s ease, color 0.3s ease;
}

.product:hover .product__cta .arrow {
  color: var(--accent-c, var(--accent-b));
}

.product:hover .product__cta .arrow {
  transform: translateX(6px);
}

/* ---------- cta band ---------- */

.cta-band {
  text-align: center;
  padding: clamp(4rem, 10vw, 8rem) 1.5rem;
  background: var(--paper);
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}

.cta-band .eyebrow {
  color: rgba(0, 0, 0, 0.45);
}

.cta-band h2 {
  font-size: clamp(2rem, 6vw, 4rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  margin-bottom: 1.2rem;
}

.cta-band p {
  color: rgba(0, 0, 0, 0.62);
  max-width: 560px;
  margin: 0 auto 2.4rem;
  line-height: 1.7;
}

.btn-inv {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  border-radius: 999px;
  padding: 0.78rem 1.9rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease;
}

.btn-inv:hover {
  transform: translateY(-2px);
  background: transparent;
  color: var(--ink);
}

/* ---------- footer ---------- */

.site-footer {
  background: var(--ink);
  padding: clamp(3.5rem, 7vw, 5.5rem) 0 0;
}

.footer-head {
  font-size: 0.7rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--muted-dim);
  margin-bottom: 1.4rem;
}

.footer-link {
  display: block;
  color: var(--muted);
  text-decoration: none;
  padding: 0.42rem 0;
  font-size: 0.94rem;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-link:hover {
  color: var(--paper);
  padding-left: 6px;
}

.footer-bottom {
  border-top: 1px solid var(--line);
  margin-top: clamp(2.5rem, 5vw, 4rem);
  padding: 1.6rem 0;
  font-size: 0.8rem;
  color: var(--muted-dim);
}

/* ---------- reveal on scroll ---------- */

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .hero__seal,
  .strip__track {
    animation: none !important;
    transition: none !important;
    opacity: 1;
    transform: none;
  }
  html { scroll-behavior: auto; }
}

/* ---------- responsive ---------- */

@media (max-width: 991.98px) {
  .split {
    grid-template-columns: 1fr;
  }
  .split__left,
  .split--flip .split__left {
    border-right: 0;
    border-left: 0;
    border-bottom: 1px solid var(--line);
  }
  .split--flip .split__left {
    order: 0;
  }
}

@media (max-width: 991.98px) {
  .hero {
    min-height: 0;
    padding: 4.5rem 0 5rem;
  }
  .hero__art {
    justify-content: flex-start;
  }
  .hero__seal {
    width: min(220px, 55vw);
    border-radius: 26px;
  }
  .hero__glow {
    left: 50%;
  }
}

@media (max-width: 575.98px) {
  .wordmark__llc {
    letter-spacing: 0.4em;
    text-indent: 0.4em;
  }
}

/* ---------- mobile offcanvas nav ---------- */

.mobile-nav.offcanvas {
  width: min(88vw, 340px);
  background: var(--ink);
  color: var(--paper);
  border-right: 1px solid var(--line-strong);
  background-image:
    radial-gradient(120% 60% at 0% 0%, rgba(255, 255, 255, 0.06), transparent 70%);
}

.mobile-nav .offcanvas-header {
  height: var(--header-h);
  padding-inline: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.mobile-nav .offcanvas-body {
  display: flex;
  flex-direction: column;
  padding: 1.5rem;
}

.mobile-nav .btn-close {
  opacity: 0.6;
  transition: opacity 0.25s ease;
}

.mobile-nav .btn-close:hover,
.mobile-nav .btn-close:focus-visible {
  opacity: 1;
}

.mobile-nav__links {
  display: flex;
  flex-direction: column;
}

.mobile-nav .nav-link-bw {
  display: block;
  padding: 1rem 0;
  font-size: 0.9rem;
  border-bottom: 1px solid var(--line);
}

.mobile-nav__cta {
  margin-top: 2rem;
  justify-content: center;
}

.mobile-nav__foot {
  margin: auto 0 0;
  padding-top: 2rem;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.mobile-nav__foot a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.25s ease;
}

.mobile-nav__foot a:hover,
.mobile-nav__foot a:focus-visible {
  color: var(--paper);
}

/* the header sits at z-index 1030; keep the panel and its scrim above it */
.mobile-nav.offcanvas {
  z-index: 1055;
}

.offcanvas-backdrop {
  --bs-backdrop-opacity: 0.7;
}