/* ==========================================================================
   Cognify Studio — shared foundation (tokens, reset, header, footer, UI)
   ========================================================================== */

:root {
  color-scheme: dark;

  /* Palette — ink + luminous lime (evolved from the original sage brand) */
  --ink: #0a0b09;
  --ink-2: #10120f;
  --ink-3: #171a15;
  --ink-4: #1f231c;
  --line: rgba(237, 236, 228, 0.08);
  --line-2: rgba(237, 236, 228, 0.16);
  --text: #edece4;
  --text-2: #a4a59c;
  --text-3: #6e7068;
  --accent: #c8f36a;
  --accent-soft: rgba(200, 243, 106, 0.12);
  --accent-ink: #0d1008;
  --sage: #8fa98d;
  --danger: #ff8b7b;

  /* Type */
  --font-sans: 'Geist', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --font-serif: 'Instrument Serif', ui-serif, Georgia, 'Times New Roman', serif;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.05rem + 0.35vw, 1.3125rem);
  --text-h3: clamp(1.25rem, 1.1rem + 0.6vw, 1.625rem);
  --text-h2: clamp(2.25rem, 1.4rem + 3.6vw, 4.75rem);
  --text-hero: clamp(2.75rem, 1.2rem + 6.4vw, 7.5rem);

  /* Space & shape */
  --gutter: clamp(1rem, 0.5rem + 2.5vw, 2.5rem);
  --max: 1320px;
  --space-section: clamp(5rem, 3.5rem + 7vw, 11rem);
  --radius-sm: 10px;
  --radius: 18px;
  --radius-lg: 28px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast: 180ms;
  --dur: 420ms;
  --dur-slow: 1100ms;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-stopped { overflow: hidden; }
body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--text);
  background: var(--ink);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}
img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

.skip-link {
  position: fixed; left: 1rem; top: -4rem; z-index: 1000;
  padding: 0.75rem 1rem; border-radius: 999px;
  background: var(--accent); color: var(--accent-ink); font-weight: 600;
  transition: top var(--dur) var(--ease-out);
}
.skip-link:focus { top: 1rem; }

.wrap { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--gutter); }
.serif { font-family: var(--font-serif); font-weight: 400; font-style: italic; letter-spacing: -0.01em; }
.accent { color: var(--accent); }
.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;
}

/* ---------- Atmosphere: film grain + vignette ---------- */
.grain {
  position: fixed; inset: -50%; z-index: 90; pointer-events: none;
  opacity: 0.055;
  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='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 1.2s steps(6) infinite;
}
@keyframes grain {
  0% { transform: translate(0, 0); }
  20% { transform: translate(-3%, 2%); }
  40% { transform: translate(2%, -4%); }
  60% { transform: translate(-4%, -1%); }
  80% { transform: translate(3%, 3%); }
  100% { transform: translate(0, 0); }
}

/* ---------- Eyebrow / labels ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-size: var(--text-xs); font-weight: 500;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-2);
}
.eyebrow::before {
  content: ''; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 12px var(--accent);
}

/* ---------- Buttons ---------- */
.btn {
  --btn-bg: transparent; --btn-fg: var(--text); --btn-bd: var(--line-2);
  position: relative; isolation: isolate; overflow: hidden;
  display: inline-flex; align-items: center; justify-content: center; gap: 0.6rem;
  min-height: 52px; padding: 0 1.6rem;
  border-radius: 999px; border: 1px solid var(--btn-bd);
  background: var(--btn-bg); color: var(--btn-fg);
  font-size: 0.95rem; font-weight: 500; letter-spacing: -0.01em; white-space: nowrap;
  transition: color var(--dur) var(--ease-out), border-color var(--dur) var(--ease-out),
              transform var(--dur) var(--ease-out);
}
.btn::before {
  content: ''; position: absolute; inset: 0; z-index: -1; border-radius: inherit;
  background: var(--text);
  transform: translateY(101%); transition: transform 600ms var(--ease-out);
}
.btn:hover::before { transform: translateY(0); }
.btn:hover { color: var(--ink); border-color: var(--text); }
.btn:active { transform: scale(0.97); }
.btn-primary { --btn-bg: var(--accent); --btn-fg: var(--accent-ink); --btn-bd: var(--accent); }
.btn-primary::before { background: var(--text); }
.btn .btn-arrow { display: inline-grid; overflow: hidden; width: 1em; height: 1em; }
.btn .btn-arrow svg { width: 1em; height: 1em; grid-area: 1 / 1; transition: transform 500ms var(--ease-out); }
.btn .btn-arrow svg:last-child { transform: translate(-120%, 120%); }
.btn:hover .btn-arrow svg:first-child { transform: translate(120%, -120%); }
.btn:hover .btn-arrow svg:last-child { transform: translate(0, 0); }

/* ---------- Header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 80;
  transition: transform 600ms var(--ease-out), background-color var(--dur), border-color var(--dur);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: rgba(10, 11, 9, 0.72);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom-color: var(--line);
}
.site-header.is-hidden { transform: translateY(-100%); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; height: 76px; }

.brand { display: inline-flex; align-items: center; gap: 0.7rem; font-weight: 600; letter-spacing: -0.02em; font-size: 1.05rem; }
.brand-mark { width: 30px; height: 30px; flex: none; }
.brand-mark .mark-ring { transform-origin: 50% 50%; transition: transform 900ms var(--ease-out); }
.brand:hover .mark-ring { transform: rotate(180deg); }

.nav { display: flex; align-items: center; gap: 0.25rem; padding: 0.3rem; border: 1px solid var(--line); border-radius: 999px; background: rgba(16, 18, 15, 0.5); }
.nav a {
  position: relative; padding: 0.5rem 0.95rem; border-radius: 999px;
  font-size: var(--text-sm); color: var(--text-2);
  transition: color var(--dur-fast), background-color var(--dur-fast);
}
.nav a:hover { color: var(--text); background: var(--ink-4); }
.nav a.is-active { color: var(--text); }
.nav a.is-active::after {
  content: ''; position: absolute; left: 50%; bottom: 3px; width: 4px; height: 4px;
  margin-left: -2px; border-radius: 50%; background: var(--accent);
}
.header-cta { min-height: 44px; padding: 0 1.2rem; font-size: var(--text-sm); }

.menu-toggle {
  display: none; position: relative; z-index: 120;
  width: 48px; height: 48px; border-radius: 50%;
  border: 1px solid var(--line-2); background: var(--ink-2);
}
.menu-toggle span {
  position: absolute; left: 15px; right: 15px; height: 1.5px; background: var(--text);
  transition: transform var(--dur) var(--ease-out), top var(--dur) var(--ease-out);
}
.menu-toggle span:first-child { top: 19px; }
.menu-toggle span:last-child { top: 27px; }
.menu-open .menu-toggle span:first-child { top: 23px; transform: rotate(45deg); }
.menu-open .menu-toggle span:last-child { top: 23px; transform: rotate(-45deg); }

.mobile-menu {
  position: fixed; inset: 0; z-index: 110;
  display: flex; flex-direction: column; justify-content: center; gap: 0.25rem;
  padding: 6rem var(--gutter) 2.5rem;
  background: var(--ink);
  clip-path: circle(0% at calc(100% - 2.5rem) 2.4rem);
  transition: clip-path 800ms var(--ease-in-out);
  visibility: hidden;
}
.menu-open .mobile-menu { clip-path: circle(150% at calc(100% - 2.5rem) 2.4rem); visibility: visible; }
.mobile-menu a.mm-link {
  display: flex; align-items: baseline; gap: 1rem;
  font-size: clamp(2rem, 9vw, 3.25rem); font-weight: 500; letter-spacing: -0.04em; line-height: 1.15;
  opacity: 0; transform: translateY(30px);
  transition: opacity 500ms var(--ease-out), transform 700ms var(--ease-out), color var(--dur-fast);
}
.mobile-menu a.mm-link small { font-size: var(--text-xs); color: var(--text-3); letter-spacing: 0.1em; font-weight: 500; }
.mobile-menu a.mm-link:hover { color: var(--accent); }
.menu-open .mobile-menu a.mm-link { opacity: 1; transform: none; }
.mobile-menu .mm-cta { margin-top: 2rem; align-self: flex-start; }
.mobile-menu .mm-foot { margin-top: auto; color: var(--text-3); font-size: var(--text-sm); }

/* ---------- Custom cursor (fine pointers only) ---------- */
.cursor, .cursor-dot { display: none; }
@media (pointer: fine) {
  .has-cursor .cursor, .has-cursor .cursor-dot {
    display: block; position: fixed; left: 0; top: 0; z-index: 200; pointer-events: none;
    border-radius: 50%;
  }
  .has-cursor .cursor-dot { width: 6px; height: 6px; margin: -3px 0 0 -3px; background: var(--accent); }
  .has-cursor .cursor {
    width: 38px; height: 38px; margin: -19px 0 0 -19px;
    border: 1px solid rgba(237, 236, 228, 0.35);
    transition: width 400ms var(--ease-out), height 400ms var(--ease-out), margin 400ms var(--ease-out),
                background-color 400ms var(--ease-out), border-color 400ms var(--ease-out), opacity 300ms;
    display: grid; place-items: center;
  }
  .has-cursor .cursor.is-hover {
    width: 72px; height: 72px; margin: -36px 0 0 -36px;
    background: rgba(200, 243, 106, 0.08); border-color: rgba(200, 243, 106, 0.5);
  }
  .has-cursor .cursor.is-hidden { opacity: 0; }
}

/* ---------- Footer ---------- */
.site-footer { position: relative; padding-top: clamp(4rem, 8vw, 7rem); border-top: 1px solid var(--line); overflow: hidden; }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 2.5rem; }
.footer-about p { margin-top: 1rem; max-width: 34ch; color: var(--text-2); font-size: var(--text-sm); }
.footer-col h3 { font-size: var(--text-xs); font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: var(--text-3); margin-bottom: 1.1rem; }
.footer-col a, .footer-col p { display: block; width: fit-content; padding: 0.3rem 0; font-size: var(--text-sm); color: var(--text-2); }
.footer-col a { position: relative; transition: color var(--dur-fast); }
.footer-col a::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 0.2rem; height: 1px;
  background: currentColor; transform: scaleX(0); transform-origin: right;
  transition: transform 500ms var(--ease-out);
}
.footer-col a:hover { color: var(--text); }
.footer-col a:hover::after { transform: scaleX(1); transform-origin: left; }

.footer-wordmark {
  display: flex; justify-content: space-between;
  margin-top: clamp(3rem, 7vw, 6rem);
  font-size: clamp(4rem, 17.5vw, 17rem); font-weight: 600; letter-spacing: -0.06em; line-height: 0.78;
  color: transparent; -webkit-text-stroke: 1px rgba(237, 236, 228, 0.16);
  user-select: none;
}
.footer-wordmark span { display: inline-block; transition: color 600ms var(--ease-out), transform 600ms var(--ease-out), -webkit-text-stroke-color 600ms; }
.footer-wordmark span:hover { color: var(--accent); -webkit-text-stroke-color: var(--accent); transform: translateY(-8%); }

.footer-bottom {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem;
  padding: 1.5rem 0 2rem; margin-top: 1.5rem; border-top: 1px solid var(--line);
  font-size: var(--text-xs); color: var(--text-3); letter-spacing: 0.02em;
}
.footer-bottom nav { display: flex; gap: 1.25rem; }
.footer-bottom a:hover { color: var(--text); }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .nav, .header-cta { display: none; }
  .menu-toggle { display: block; }
  .header-inner { height: 68px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-about { grid-column: 1 / -1; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .btn { width: 100%; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important; animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important; scroll-behavior: auto !important;
  }
  .grain { animation: none; }
}