/* ==========================================================================
   Leaming Design — design system + site styles
   Vanilla CSS. Dark "engineered warmth": ink canvas, bone type, ember accent.
   ========================================================================== */

/* ---- tokens ------------------------------------------------------------- */
:root {
  /* colour */
  --ink:        #0a0a0c;
  --ink-2:      #101013;
  --ink-3:      #16161b;
  --bone:       #f3efe7;
  --bone-dim:   #b8b2a6;
  --muted:      #837d72;
  --line:       rgba(243, 239, 231, 0.10);
  --line-strong:rgba(243, 239, 231, 0.20);
  --ember:      #ff6a3d;
  --ember-soft: #ff8a63;
  --gold:       #ffce7a;
  --cool:       #7ea6ff;

  /* type */
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", monospace;

  /* spacing scale (4px base) */
  --s1: 4px;  --s2: 8px;  --s3: 12px; --s4: 16px; --s5: 24px;
  --s6: 32px; --s7: 48px; --s8: 64px; --s9: 96px; --s10: 144px;

  /* motion */
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-smooth: cubic-bezier(0.25, 0.8, 0.25, 1);
  --ease-overshoot: cubic-bezier(0.68, -0.55, 0.265, 1.55);

  --maxw: 1280px;
  --radius: 14px;
}

/* ---- reset -------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--ink);
  color: var(--bone);
  font-family: var(--font-sans);
  font-size: clamp(1rem, 0.95rem + 0.3vw, 1.125rem);
  line-height: 1.6;
  font-feature-settings: "kern", "liga", "calt";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
::selection { background: var(--ember); color: #1a0a04; }

/* ---- grain + ambient ember glow ---------------------------------------- */
body::before {  /* film grain */
  content: ""; position: fixed; inset: 0; z-index: 9998; pointer-events: none;
  opacity: 0.035; mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---- layout helpers ----------------------------------------------------- */
.wrap { width: min(100% - 2 * var(--s5), var(--maxw)); margin-inline: auto; }
.section { padding-block: clamp(var(--s8), 10vw, var(--s10)); }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--ember); display: inline-flex; align-items: center; gap: var(--s3);
}
.eyebrow::before { content: ""; width: 28px; height: 1px; background: var(--ember); display: inline-block; }
.lede { color: var(--bone-dim); font-size: clamp(1.05rem, 1rem + 0.5vw, 1.4rem); max-width: 56ch; }

/* fluid display type */
.h-display {
  font-family: var(--font-display);
  font-weight: 400;
  font-optical-sizing: auto;
  line-height: 0.98;
  letter-spacing: -0.015em;
}
h1.h-display { font-size: clamp(2.6rem, 1.5rem + 7vw, 7.5rem); }
h2.h-display { font-size: clamp(2rem, 1.2rem + 4vw, 4.5rem); }
h3.h-display { font-size: clamp(1.5rem, 1.1rem + 1.6vw, 2.3rem); }
.accent { color: var(--ember); font-style: italic; }
.gold { color: var(--gold); }

/* ==========================================================================
   NAV
   ========================================================================== */
.nav {
  position: fixed; inset-block-start: 0; inset-inline: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--s5) clamp(var(--s5), 5vw, var(--s8));
  transition: padding .4s var(--ease-smooth), background .4s var(--ease-smooth),
              border-color .4s var(--ease-smooth), backdrop-filter .4s var(--ease-smooth);
  border-bottom: 1px solid transparent;
}
.nav.is-stuck {
  padding-block: var(--s3);
  background: color-mix(in oklab, var(--ink) 78%, transparent);
  backdrop-filter: blur(14px) saturate(1.4);
  border-bottom-color: var(--line);
}
.brand { font-family: var(--font-display); font-size: 1.3rem; letter-spacing: -0.02em; display: flex; align-items: baseline; gap: 0.5ch; }
.brand b { font-weight: 600; }
.brand .dot { color: var(--ember); }
.nav-links { display: flex; align-items: center; gap: clamp(var(--s4), 3vw, var(--s7)); }
.nav-links a { font-size: 0.95rem; color: var(--bone-dim); position: relative; transition: color .25s var(--ease-standard); }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -4px; width: 100%; height: 1px;
  background: var(--ember); transform: scaleX(0); transform-origin: right;
  transition: transform .3s var(--ease-smooth);
}
.nav-links a:hover { color: var(--bone); }
.nav-links a:hover::after, .nav-links a[aria-current="page"]::after { transform: scaleX(1); transform-origin: left; }
.nav-links a[aria-current="page"] { color: var(--bone); }
.nav-cta {
  font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.08em; text-transform: uppercase;
  padding: var(--s2) var(--s4); border: 1px solid var(--line-strong); border-radius: 100px;
  color: var(--bone); transition: background .3s var(--ease-smooth), border-color .3s var(--ease-smooth), color .3s;
}
.nav-cta:hover { background: var(--ember); border-color: var(--ember); color: #1a0a04; }
.nav-toggle { display: none; }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero { position: relative; min-height: 100svh; display: flex; align-items: center; padding-block: var(--s10) var(--s9); overflow: hidden; }
.hero-glow {
  position: absolute; z-index: 0; inset: 0; pointer-events: none;
  background:
    radial-gradient(60% 50% at 75% 15%, color-mix(in oklab, var(--ember) 28%, transparent), transparent 70%),
    radial-gradient(50% 60% at 10% 90%, color-mix(in oklab, var(--cool) 14%, transparent), transparent 70%);
  filter: blur(10px);
}
.hero-inner { position: relative; z-index: 1; }
.hero h1 { margin-block: var(--s5) var(--s6); max-width: 18ch; }
.hero .lede { margin-bottom: var(--s7); }
.hero-meta { display: flex; flex-wrap: wrap; gap: var(--s5) var(--s7); align-items: center; }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--s4); align-items: center; }

/* word reveal */
.reveal-line { display: block; overflow: hidden; }
.reveal-word { display: inline-block; }

/* buttons */
.btn {
  --bg: var(--ember); --fg: #1a0a04;
  position: relative; display: inline-flex; align-items: center; gap: var(--s3);
  font-family: var(--font-mono); font-size: 0.82rem; letter-spacing: 0.06em; text-transform: uppercase;
  padding: var(--s4) var(--s6); border-radius: 100px; background: var(--bg); color: var(--fg);
  transition: transform .3s var(--ease-smooth), box-shadow .3s var(--ease-smooth);
  will-change: transform; overflow: hidden;
}
.btn::after {
  content: ""; position: absolute; inset: 0; background: #fff; opacity: 0;
  transition: opacity .3s var(--ease-standard);
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 30px -8px color-mix(in oklab, var(--ember) 60%, transparent); }
.btn:hover::after { opacity: 0.12; }
.btn:active { transform: translateY(0) scale(0.98); }
.btn .arrow { transition: transform .3s var(--ease-overshoot); }
.btn:hover .arrow { transform: translateX(4px); }
.btn-ghost { --bg: transparent; --fg: var(--bone); border: 1px solid var(--line-strong); }
.btn-ghost:hover { box-shadow: none; border-color: var(--bone); }

/* stat row */
.stat { display: flex; flex-direction: column; gap: 2px; }
.stat b { font-family: var(--font-display); font-size: clamp(1.6rem, 1.2rem + 1.5vw, 2.4rem); line-height: 1; }
.stat span { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }

/* ==========================================================================
   MARQUEE
   ========================================================================== */
.marquee { border-block: 1px solid var(--line); padding-block: var(--s5); overflow: hidden; white-space: nowrap; -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.marquee-track { display: inline-flex; gap: var(--s7); animation: marquee 28s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-item { font-family: var(--font-display); font-size: clamp(1.4rem, 1rem + 2vw, 2.4rem); color: var(--bone-dim); display: inline-flex; align-items: center; gap: var(--s7); }
.marquee-item::after { content: "✦"; color: var(--ember); font-size: 0.6em; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ==========================================================================
   SECTION HEADERS
   ========================================================================== */
.sec-head { display: grid; grid-template-columns: 1fr; gap: var(--s5); margin-bottom: var(--s8); align-items: end; }
@media (min-width: 800px) { .sec-head { grid-template-columns: 1.2fr 1fr; } }
.sec-head .lede { justify-self: start; }
.sec-index { font-family: var(--font-mono); font-size: 0.75rem; color: var(--muted); letter-spacing: 0.1em; }

/* ==========================================================================
   OFFERS
   ========================================================================== */
.offers { display: grid; gap: var(--s5); grid-template-columns: 1fr; }
@media (min-width: 760px) { .offers { grid-template-columns: repeat(3, 1fr); } }
.offer {
  position: relative; display: flex; flex-direction: column; gap: var(--s4);
  padding: var(--s7) var(--s6); border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--ink-2), var(--ink));
  transition: transform .4s var(--ease-smooth), border-color .4s var(--ease-smooth), background .4s;
  overflow: hidden;
}
.offer::before {
  content: ""; position: absolute; inset: 0; opacity: 0; transition: opacity .4s var(--ease-standard);
  background: radial-gradient(120% 80% at 50% -10%, color-mix(in oklab, var(--ember) 18%, transparent), transparent 60%);
}
.offer:hover { transform: translateY(-6px); border-color: var(--line-strong); }
.offer:hover::before { opacity: 1; }
.offer-num { font-family: var(--font-mono); font-size: 0.75rem; color: var(--ember); letter-spacing: 0.15em; }
.offer h3 { font-family: var(--font-display); font-size: 1.6rem; line-height: 1.1; }
.offer p { color: var(--bone-dim); font-size: 0.98rem; flex: 1; }
.offer .price { font-family: var(--font-mono); font-size: 0.82rem; color: var(--bone); padding-top: var(--s4); border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: var(--s3); }
.offer .price span { color: var(--muted); }

/* ==========================================================================
   CASE STUDIES
   ========================================================================== */
.cases { display: grid; gap: var(--s6); grid-template-columns: 1fr; }
@media (min-width: 860px) { .cases { grid-template-columns: repeat(2, 1fr); } }
.case {
  position: relative; display: flex; flex-direction: column; min-height: 380px;
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  background: var(--ink-2);
  transition: transform .5s var(--ease-smooth), border-color .5s var(--ease-smooth), box-shadow .5s;
}
.case.is-hero { grid-column: 1 / -1; min-height: 460px; }
.case:hover { transform: translateY(-6px); border-color: var(--line-strong); box-shadow: 0 30px 60px -30px rgba(0,0,0,0.8); }
.case-art { position: absolute; inset: 0; z-index: 0; overflow: hidden; }
.case-art::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 30%, var(--ink-2) 96%); }
.case-mesh { position: absolute; inset: -20%; transition: transform .8s var(--ease-smooth); }
.case:hover .case-mesh { transform: scale(1.08); }
/* per-case gradient meshes */
.mesh-arbor   { background: radial-gradient(40% 50% at 30% 30%, #2f6f4e, transparent 70%), radial-gradient(45% 55% at 75% 60%, #b9863f, transparent 70%), radial-gradient(60% 60% at 50% 90%, #143024, transparent 70%), #0d130f; }
.mesh-resort  { background: radial-gradient(45% 55% at 25% 35%, #2a4a7a, transparent 70%), radial-gradient(40% 50% at 80% 30%, #7a5a9a, transparent 70%), radial-gradient(60% 60% at 60% 90%, #101a2e, transparent 70%), #0b0f18; }
.mesh-spaf    { background: radial-gradient(45% 55% at 70% 30%, #b8417a, transparent 70%), radial-gradient(45% 55% at 25% 60%, #5a3fb8, transparent 70%), radial-gradient(60% 60% at 50% 95%, #1d1030, transparent 70%), #120a1a; }
.mesh-brand   { background: radial-gradient(40% 50% at 30% 35%, #c06a2e, transparent 70%), radial-gradient(45% 55% at 78% 55%, #d8a23e, transparent 70%), radial-gradient(60% 60% at 50% 92%, #2a1606, transparent 70%), #160d06; }
.mesh-agent   { background: radial-gradient(45% 55% at 75% 30%, #2e7d8a, transparent 70%), radial-gradient(40% 50% at 25% 40%, #3f5ab8, transparent 70%), radial-gradient(60% 60% at 50% 95%, #07211f, transparent 70%), #06141a; }
.mesh-audit   { background: radial-gradient(45% 55% at 30% 30%, #6a6f2e, transparent 70%), radial-gradient(40% 50% at 78% 60%, #3f8a5a, transparent 70%), radial-gradient(60% 60% at 50% 95%, #0c1c10, transparent 70%), #0a120a; }
.case-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease-smooth); }
.case:hover .case-img { transform: scale(1.06); }
.case-figure { margin-top: var(--s5); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--ink-2); }
.case-figure img { width: 100%; height: auto; display: block; }
.case-figure figcaption { font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted); padding: var(--s3) var(--s5); border-top: 1px solid var(--line); letter-spacing: 0.04em; }
.album-strip { display: grid; grid-template-columns: repeat(auto-fill, minmax(108px, 1fr)); gap: var(--s3); margin-top: var(--s5); }
.album-strip img { width: 100%; aspect-ratio: 1; object-fit: cover; border-radius: 8px; border: 1px solid var(--line); transition: transform .35s var(--ease-smooth), border-color .35s var(--ease-smooth), box-shadow .35s; }
.album-strip img:hover { transform: translateY(-3px) scale(1.03); border-color: var(--line-strong); box-shadow: 0 14px 28px -14px rgba(0,0,0,0.7); }
.album-cap { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin-top: var(--s5); }
.case-body { position: relative; z-index: 1; margin-top: auto; padding: var(--s6); display: flex; flex-direction: column; gap: var(--s3); }
.case-tag { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--gold); }
.case h3 { font-family: var(--font-display); font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2.2rem); line-height: 1.05; }
.case p { color: var(--bone-dim); font-size: 0.97rem; max-width: 60ch; }
.case-meta { display: flex; flex-wrap: wrap; gap: var(--s2) var(--s4); margin-top: var(--s2); }
.case-meta li { list-style: none; font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted); padding: 3px 10px; border: 1px solid var(--line); border-radius: 100px; }
.case-link { display: inline-flex; align-items: center; gap: var(--s2); font-family: var(--font-mono); font-size: 0.78rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ember); margin-top: var(--s2); }
.case-link .arrow { transition: transform .3s var(--ease-overshoot); }
.case:hover .case-link .arrow { transform: translateX(5px); }

/* ==========================================================================
   LAB GRID
   ========================================================================== */
.lab { display: grid; gap: var(--s4); grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.lab-item {
  padding: var(--s5); border: 1px solid var(--line); border-radius: 12px; background: var(--ink-2);
  display: flex; flex-direction: column; gap: var(--s2);
  transition: transform .3s var(--ease-smooth), border-color .3s, background .3s;
}
.lab-item:hover { transform: translateY(-3px); border-color: var(--line-strong); background: var(--ink-3); }
.lab-item h4 { font-size: 1rem; font-weight: 600; }
.lab-item p { font-size: 0.85rem; color: var(--muted); }
.lab-item .k { font-family: var(--font-mono); font-size: 0.68rem; color: var(--ember); letter-spacing: 0.1em; text-transform: uppercase; }

/* ==========================================================================
   PROCESS (services)
   ========================================================================== */
.steps { display: grid; gap: var(--s5); grid-template-columns: 1fr; counter-reset: step; }
@media (min-width: 760px) { .steps { grid-template-columns: repeat(2, 1fr); } }
.step { position: relative; padding: var(--s6); border: 1px solid var(--line); border-radius: var(--radius); background: var(--ink-2); }
.step::before { counter-increment: step; content: counter(step, decimal-leading-zero); font-family: var(--font-mono); font-size: 0.8rem; color: var(--ember); letter-spacing: 0.1em; }
.step h3 { font-family: var(--font-display); font-size: 1.4rem; margin-block: var(--s3) var(--s2); }
.step p { color: var(--bone-dim); font-size: 0.95rem; }

/* ==========================================================================
   FAQ
   ========================================================================== */
.faq { display: grid; gap: var(--s3); max-width: 820px; }
.faq-item { border: 1px solid var(--line); border-radius: 12px; background: var(--ink-2); overflow: hidden; }
.faq-q { width: 100%; display: flex; justify-content: space-between; align-items: center; gap: var(--s4); padding: var(--s5) var(--s6); text-align: left; font-size: 1.05rem; cursor: pointer; list-style: none; }
.faq-q::-webkit-details-marker { display: none; }
.faq-q::marker { content: ""; }
.faq-q .plus { position: relative; width: 16px; height: 16px; flex: none; }
.faq-q .plus::before, .faq-q .plus::after { content: ""; position: absolute; inset: 50% 0; height: 1.5px; background: var(--ember); transition: transform .3s var(--ease-smooth); }
.faq-q .plus::after { transform: rotate(90deg); }
.faq-item[open] .plus::after { transform: rotate(0); }
.faq-a { padding: 0 var(--s6) var(--s5); color: var(--bone-dim); font-size: 0.97rem; max-width: 70ch; }

/* ==========================================================================
   CTA + FOOTER
   ========================================================================== */
.cta {
  position: relative; text-align: center; border-radius: 24px; overflow: hidden;
  padding: clamp(var(--s8), 10vw, var(--s10)) var(--s5);
  background: linear-gradient(180deg, var(--ink-2), var(--ink));
  border: 1px solid var(--line);
}
.cta-glow { position: absolute; inset: 0; z-index: 0; background: radial-gradient(50% 80% at 50% 120%, color-mix(in oklab, var(--ember) 40%, transparent), transparent 70%); }
.cta > * { position: relative; z-index: 1; }
.cta h2 { margin-bottom: var(--s5); }
.cta p { color: var(--bone-dim); margin-bottom: var(--s7); }

.footer { border-top: 1px solid var(--line); padding-block: var(--s8) var(--s6); margin-top: var(--s9); }
.footer-grid { display: grid; gap: var(--s7); grid-template-columns: 1fr; }
@media (min-width: 760px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr; } }
.footer h4 { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); margin-bottom: var(--s4); }
.footer .brand { font-size: 1.8rem; margin-bottom: var(--s4); }
.footer ul { list-style: none; display: grid; gap: var(--s2); }
.footer a { color: var(--bone-dim); transition: color .25s; }
.footer a:hover { color: var(--ember); }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--s4); margin-top: var(--s8); padding-top: var(--s5); border-top: 1px solid var(--line); font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted); letter-spacing: 0.04em; }

/* ==========================================================================
   SCROLL REVEAL
   ========================================================================== */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease-out), transform .7s var(--ease-out); }
.reveal.is-visible { opacity: 1; transform: none; }
[data-stagger] > * { opacity: 0; transform: translateY(20px); transition: opacity .6s var(--ease-out), transform .6s var(--ease-out); }
[data-stagger].is-visible > * { opacity: 1; transform: none; }

/* ==========================================================================
   RESPONSIVE NAV
   ========================================================================== */
@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; flex-direction: column; gap: 5px; padding: var(--s2); }
  .nav-toggle span { width: 24px; height: 2px; background: var(--bone); transition: transform .3s var(--ease-smooth), opacity .3s; }
  .nav-links {
    position: fixed; inset: 0; flex-direction: column; justify-content: center; gap: var(--s6);
    background: color-mix(in oklab, var(--ink) 96%, transparent); backdrop-filter: blur(20px);
    transform: translateX(100%); transition: transform .5s var(--ease-smooth); font-size: 1.4rem;
  }
  .nav-links.is-open { transform: none; }
  .nav-links a { font-size: 1.4rem; color: var(--bone); }
  body.menu-open { overflow: hidden; }
  .nav.is-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav.is-open .nav-toggle span:nth-child(2) { opacity: 0; }
  .nav.is-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* ---- reduced motion ----------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
  .reveal, [data-stagger] > * { opacity: 1 !important; transform: none !important; }
}

/* ---- focus -------------------------------------------------------------- */
:focus-visible { outline: 2px solid var(--ember); outline-offset: 3px; border-radius: 4px; }
.skip { position: absolute; left: -9999px; top: 0; z-index: 10001; background: var(--ember); color: #1a0a04; padding: var(--s3) var(--s5); font-family: var(--font-mono); font-size: 0.8rem; }
.skip:focus { left: var(--s4); top: var(--s4); }