/* ==========================================================================
   Koken Labs — kokenlabs.ai
   Brand system v1.0 · dark-first · "From Chaos to Clarity"
   ========================================================================== */

:root {
  /* Brand colors */
  --obsidian: #0A0B0E;
  --carbon: #14161B;
  --carbon-2: #191C23;
  --steel: #262A33;
  --nova-violet: #A24BFF;
  --nova-pink: #FF53B1;
  --volt: #C8FA4B;
  --cloud: #F4F6FA;
  --mist: #99A2B2;
  --nova-gradient: linear-gradient(120deg, var(--nova-violet), var(--nova-pink));

  /* Type */
  --font-display: "Space Grotesk", "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* Layout */
  --max-w: 72rem;
  --radius: 1.25rem;
  --radius-sm: 0.75rem;
  --header-h: 4.25rem;
}

/* ---------- Reset / base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--obsidian);
  color: var(--cloud);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--nova-violet); text-decoration: none; }
a:hover { text-decoration: underline; }
p { margin: 0 0 1rem; }
strong { font-weight: 600; color: var(--cloud); }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 1rem;
  letter-spacing: -0.015em;
  text-wrap: balance;
}
h1 { font-size: clamp(2.4rem, 6vw, 3.9rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }

.lede { font-size: clamp(1.1rem, 2vw, 1.3rem); color: var(--mist); max-width: 44rem; }
.muted { color: var(--mist); }

/* Focus — visible, high contrast (WCAG 2.4.7) */
:focus-visible {
  outline: 3px solid var(--volt);
  outline-offset: 3px;
  border-radius: 4px;
}
.skip-link {
  position: absolute; left: 1rem; top: -4rem;
  background: var(--volt); color: var(--obsidian);
  padding: .6rem 1rem; border-radius: .5rem; font-weight: 600;
  z-index: 100; transition: top .2s ease;
}
.skip-link:focus { top: 1rem; text-decoration: none; }

/* ---------- Utility ---------- */
.wrap { max-width: var(--max-w); margin: 0 auto; padding: 0 1.5rem; }
.grad-text {
  background: var(--nova-gradient);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.eyebrow {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .78rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: #B673FF;
  display: inline-flex; align-items: center; gap: .5rem;
  margin-bottom: 1rem;
}
.eyebrow::before {
  content: ""; width: .5rem; height: .5rem; border-radius: 50%;
  background: var(--nova-gradient);
}
.center { text-align: center; }
.center .lede { margin-inline: auto; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  font-family: var(--font-display); font-weight: 600; font-size: 1rem;
  padding: .85rem 1.6rem; border-radius: 999px;
  border: 1px solid transparent; cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background-color .18s ease;
  text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-primary {
  background: var(--nova-gradient); color: var(--obsidian);
  box-shadow: 0 6px 24px rgba(162, 75, 255, .35);
}
.btn-primary:hover { box-shadow: 0 10px 32px rgba(255, 83, 177, .45); }
.btn-ghost {
  background: transparent; color: var(--cloud);
  border-color: var(--steel);
}
.btn-ghost:hover { border-color: var(--nova-violet); background: rgba(162,75,255,.08); }
.btn-lg { padding: 1.05rem 2.1rem; font-size: 1.1rem; }
.btn-note { font-size: .9rem; color: var(--mist); margin-top: .75rem; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(10, 11, 14, .82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--steel);
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h); gap: 1rem;
}
.logo img { height: 2rem; width: auto; }
.site-nav { display: flex; align-items: center; gap: 1.75rem; }
.site-nav a {
  color: var(--mist); font-weight: 500; font-size: .97rem;
}
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--cloud); text-decoration: none; }
.site-nav a[aria-current="page"] { position: relative; }
.site-nav a[aria-current="page"]::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -.4rem; height: 2px;
  background: var(--nova-gradient); border-radius: 2px;
}
.site-nav .btn { padding: .6rem 1.25rem; font-size: .95rem; }
.nav-toggle {
  display: none; background: none; border: 1px solid var(--steel);
  border-radius: .6rem; padding: .5rem .65rem; cursor: pointer;
}
.nav-toggle span {
  display: block; width: 1.35rem; height: 2px; background: var(--cloud);
  margin: .3rem 0; border-radius: 2px; transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(.38rem) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-.38rem) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: clamp(5rem, 12vw, 8.5rem) 0 clamp(4rem, 9vw, 6.5rem);
  isolation: isolate;
}
.hero-bg {
  position: absolute; inset: 0; z-index: -1; pointer-events: none;
}
.hero-bg::before {
  content: ""; position: absolute; inset: -20%;
  background:
    radial-gradient(38% 45% at 22% 28%, rgba(162,75,255,.30), transparent 70%),
    radial-gradient(34% 42% at 78% 20%, rgba(255,83,177,.22), transparent 70%),
    radial-gradient(50% 55% at 55% 90%, rgba(162,75,255,.14), transparent 70%);
  animation: heroFloat 18s ease-in-out infinite alternate;
}
@keyframes heroFloat {
  from { transform: translate3d(-2%, -1%, 0) scale(1); }
  to   { transform: translate3d(2%, 2%, 0) scale(1.06); }
}
.hero canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero .wrap { position: relative; max-width: 54rem; text-align: center; }
.hero h1 { margin-bottom: 1.25rem; }
.hero .lede { margin: 0 auto 2.25rem; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: center; }
.hero-reassure {
  margin-top: 1.25rem; font-size: .95rem; color: var(--mist);
  font-family: var(--font-mono); font-weight: 500;
}
.hero-reassure em { color: var(--volt); font-style: normal; } /* Volt: the one spark per screen */

/* ---------- Sections ---------- */
.section { padding: clamp(3.5rem, 9vw, 6.5rem) 0; }
.section-head { max-width: 46rem; margin-bottom: clamp(2rem, 5vw, 3.5rem); }
.section-head.center { margin-inline: auto; text-align: center; }

/* Light "relief" section — warm break from the dark */
.section--light {
  background: var(--cloud);
  color: #1A1D24;
}
.section--light h2, .section--light h3 { color: #0A0B0E; }
.section--light .lede, .section--light .muted { color: #4A5160; }
.section--light strong { color: #0A0B0E; }
.section--light a { color: #7A2FE0; }
.section--light .eyebrow { color: #7A2FE0; }

/* ---------- Cards / grids ---------- */
.grid { display: grid; gap: 1.25rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--carbon);
  border: 1px solid var(--steel);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: transform .2s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-4px); border-color: rgba(162,75,255,.55); }
.card h3 { margin-bottom: .5rem; }
.card p { color: var(--mist); margin-bottom: 0; }
.card .card-tag {
  font-family: var(--font-mono); font-weight: 500; font-size: .78rem;
  letter-spacing: .1em; text-transform: uppercase; color: #B673FF;
  display: block; margin-bottom: .75rem;
}
.card-link { display: inline-block; margin-top: 1rem; font-weight: 600; color: #B673FF; }
.card-quote { font-style: normal; margin: 0; }
.card-quote p { color: var(--cloud); }
.card-quote footer { margin-top: 1rem; color: var(--mist); font-size: .92rem; }

.section--light .card { background: #fff; border-color: #E2E6EE; }
.section--light .card p { color: #4A5160; }

/* Alternating rows: visual swap on desktop, text-first on mobile */
.grid-swap > :first-child { order: 2; }
@media (max-width: 44rem) { .grid-swap > :first-child { order: 0; } }

/* Service icons */
.svc-icon {
  width: 3rem; height: 3rem; border-radius: .9rem;
  display: grid; place-items: center; margin-bottom: 1.25rem;
  background: rgba(162,75,255,.12);
  border: 1px solid rgba(162,75,255,.35);
}
.svc-icon svg { width: 1.5rem; height: 1.5rem; }

/* Journey strip: Learn → Plan → Build → Run */
.journey {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: center;
  gap: .75rem; margin-top: 2.5rem;
  font-family: var(--font-mono); font-weight: 700; font-size: .95rem;
  letter-spacing: .08em; text-transform: uppercase;
}
.journey span { color: var(--cloud); }
.journey .journey-sep { color: var(--nova-pink); }

/* Steps */
.step { position: relative; padding-top: .5rem; }
.step-num {
  font-family: var(--font-mono); font-weight: 700; font-size: 2.6rem;
  background: var(--nova-gradient);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  display: block; margin-bottom: .75rem; line-height: 1;
}

/* Example rows */
.example {
  display: flex; gap: 1.1rem; align-items: flex-start;
  background: var(--carbon); border: 1px solid var(--steel);
  border-radius: var(--radius-sm); padding: 1.25rem 1.4rem;
}
.example .ex-icon { flex: none; margin-top: .2rem; color: var(--nova-pink); }
.example h3 { font-size: 1.08rem; margin-bottom: .3rem; }
.example p { color: var(--mist); margin: 0; font-size: .98rem; }

/* ---------- Comparison table ---------- */
.table-scroll { overflow-x: auto; border: 1px solid var(--steel); border-radius: var(--radius-sm); }
table.compare { width: 100%; border-collapse: collapse; font-size: .98rem; min-width: 34rem; }
.compare caption { text-align: left; padding: 1rem 1.25rem; font-weight: 600; font-family: var(--font-display); background: var(--carbon-2); }
.compare th, .compare td { text-align: left; padding: .85rem 1.25rem; border-top: 1px solid var(--steel); vertical-align: top; }
.compare thead th { background: var(--carbon-2); font-family: var(--font-display); border-top: 0; }
.compare td { color: var(--mist); }
.compare td:first-child, .compare th[scope="row"] { color: var(--cloud); font-weight: 500; }

/* ---------- FAQ ---------- */
.faq-item {
  border: 1px solid var(--steel); border-radius: var(--radius-sm);
  background: var(--carbon); margin-bottom: .85rem;
}
.faq-item summary {
  cursor: pointer; list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: 1rem;
  padding: 1.1rem 1.4rem;
  font-family: var(--font-display); font-weight: 600; font-size: 1.08rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; font-family: var(--font-mono); font-size: 1.3rem;
  color: #B673FF; flex: none; transition: transform .2s ease;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item .faq-a { padding: 0 1.4rem 1.25rem; color: var(--mist); }
.faq-item .faq-a p:last-child { margin-bottom: 0; }
.faq-item h3 { font-size: 1.08rem; margin: 0; font-weight: 600; }
.section--light .faq-item { background: #fff; border-color: #E2E6EE; }
.section--light .faq-item .faq-a { color: #4A5160; }
.section--light .faq-item summary::after { color: #7A2FE0; }

/* ---------- CTA band ---------- */
.cta-band {
  position: relative; overflow: hidden;
  border: 1px solid var(--steel); border-radius: var(--radius);
  background:
    radial-gradient(60% 120% at 15% 0%, rgba(162,75,255,.28), transparent 60%),
    radial-gradient(60% 120% at 85% 100%, rgba(255,83,177,.22), transparent 60%),
    var(--carbon);
  padding: clamp(2.5rem, 6vw, 4rem);
  text-align: center;
}
.cta-band h2 { margin-bottom: .75rem; }
.cta-band .lede { margin: 0 auto 1.75rem; }

/* ---------- Learn / article pages ---------- */
.article-meta {
  font-family: var(--font-mono); font-size: .85rem; color: var(--mist);
  margin-bottom: 2rem;
}
.tldr {
  border: 1px solid rgba(162,75,255,.45);
  background: rgba(162,75,255,.07);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.5rem; margin-bottom: 2.5rem;
}
.tldr strong { font-family: var(--font-mono); letter-spacing: .1em; font-size: .85rem; }
.prose { max-width: 46rem; }
.prose h2 { margin-top: 3rem; }
.prose h3 { margin-top: 2rem; }
.prose ul, .prose ol { padding-left: 1.25rem; color: var(--mist); }
.prose ul li, .prose ol li { margin-bottom: .5rem; }

/* ---------- Forms ---------- */
.form-grid { display: grid; gap: 1.1rem; }
label { font-weight: 600; font-size: .95rem; display: block; margin-bottom: .4rem; }
input, textarea, select {
  width: 100%; padding: .8rem 1rem;
  background: var(--carbon-2); color: var(--cloud);
  border: 1px solid var(--steel); border-radius: var(--radius-sm);
  font: inherit;
}
input::placeholder, textarea::placeholder { color: #79828F; }
input:focus, textarea:focus, select:focus {
  outline: 2px solid var(--nova-violet); outline-offset: 1px; border-color: var(--nova-violet);
}
.form-hint { font-size: .88rem; color: var(--mist); margin-top: .35rem; }

/* Inline email capture */
.email-capture {
  display: flex; flex-wrap: wrap; gap: .75rem; max-width: 34rem; margin-inline: auto;
}
.email-capture input { flex: 1 1 14rem; }
.email-capture .btn { flex: none; }

/* Booking embed placeholder */
.booking-embed {
  border: 2px dashed var(--steel); border-radius: var(--radius);
  background: var(--carbon);
  min-height: 22rem; display: grid; place-items: center;
  text-align: center; padding: 2rem;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--steel);
  padding: 3.5rem 0 2.5rem;
  color: var(--mist); font-size: .95rem;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; margin-bottom: 2.5rem; }
.footer-grid h4 { font-size: .82rem; font-family: var(--font-mono); font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--cloud); margin-bottom: 1rem; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: .6rem; }
.footer-grid a { color: var(--mist); }
.footer-grid a:hover { color: var(--cloud); }
.footer-mark img { height: 2.75rem; margin-bottom: 1rem; }
.footer-bottom {
  border-top: 1px solid var(--steel); padding-top: 1.5rem;
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem;
  font-size: .88rem;
}

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .hero canvas { display: none; }
}

/* ---------- Responsive ---------- */
@media (max-width: 60rem) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 44rem) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .nav-toggle { display: block; }
  .site-nav {
    position: absolute; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(10,11,14,.97); border-bottom: 1px solid var(--steel);
    padding: .5rem 1.5rem 1.25rem;
    display: none;
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: .8rem 0; font-size: 1.05rem; }
  .site-nav a[aria-current="page"]::after { display: none; }
  .site-nav .btn { margin-top: .75rem; justify-content: center; }
  .hero-ctas .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
}