/* ==========================================================================
   Elanvale — corporate umbrella site
   Aesthetic: refined editorial "applied-research studio".
   Warm bone paper · warm ink · deep evergreen accent · rare ochre highlight.
   Display: Newsreader (editorial serif) · Body: Hanken Grotesk (grotesque).
   ========================================================================== */

:root {
  --paper:        #F5F2EA;
  --paper-2:      #EFEBE0;
  --ink:          #191B18;
  --ink-soft:     #4C504A;
  --ink-faint:    #7C807A;
  --accent:       #2C5740;   /* deep evergreen */
  --accent-deep:  #1F3F2E;
  --accent-tint:  #E2E9DF;
  --ochre:        #B0763A;   /* rare warm highlight */
  --line:         rgba(25, 27, 24, 0.14);
  --line-soft:    rgba(25, 27, 24, 0.08);

  --maxw:         1180px;
  --gutter:       clamp(20px, 5vw, 64px);

  --f-display: "Newsreader", Georgia, "Times New Roman", serif;
  --f-body:    "Hanken Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;

  --step--1: clamp(0.78rem, 0.74rem + 0.2vw, 0.86rem);
  --step-0:  clamp(1rem, 0.96rem + 0.2vw, 1.12rem);
  --step-1:  clamp(1.2rem, 1.1rem + 0.5vw, 1.45rem);
  --step-2:  clamp(1.6rem, 1.35rem + 1.2vw, 2.4rem);
  --step-3:  clamp(2.3rem, 1.8rem + 2.6vw, 4rem);
  --step-4:  clamp(3rem, 2.1rem + 4.6vw, 6.2rem);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--f-body);
  font-size: var(--step-0);
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  font-weight: 400;
  letter-spacing: 0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Grain overlay for paper depth -------------------------------------------- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9999;
  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");
}

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

img, svg { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

/* Layout primitives -------------------------------------------------------- */
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding-inline: var(--gutter); }

.label {
  font-size: var(--step--1);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.7em;
}
.label::before {
  content: "";
  width: 1.8em;
  height: 1px;
  background: var(--accent);
  opacity: 0.5;
}

.serif { font-family: var(--f-display); font-weight: 400; line-height: 1.08; letter-spacing: -0.012em; }
.serif em { font-style: italic; }

/* Header / nav ------------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--paper);   /* solid: the hero contour / page content can never show through behind the Contact button */
  border-bottom: 1px solid var(--line);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;            /* floors spacing so items can never overlap, even on overflow */
  height: 72px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  font-family: var(--f-display);
  font-size: 1.4rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.brand__mark { width: 22px; height: 22px; color: var(--accent); flex: none; }
.nav__links { display: flex; gap: 2rem; align-items: center; }
.nav__links a {
  font-size: var(--step--1);
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  position: relative;
  padding: 4px 0;
  transition: color 0.25s ease;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.nav__links a:hover { color: var(--ink); }
.nav__links a:hover::after { transform: scaleX(1); }
.nav__cta {
  font-family: var(--f-body);
  font-size: var(--step--1);
  font-weight: 600;
  letter-spacing: 0.03em;
  border: 1px solid var(--ink);
  border-radius: 100px;
  padding: 0.55em 1.2em;
  color: var(--ink) !important;
  transition: background 0.25s ease, color 0.25s ease;
}
.nav__cta::after { display: none; }
.nav__cta:hover { background: var(--ink); color: var(--paper) !important; }

/* Hero --------------------------------------------------------------------- */
.hero { position: relative; padding-top: clamp(48px, 9vh, 110px); padding-bottom: clamp(48px, 8vh, 96px); overflow: hidden; }
.hero__contour {
  position: absolute;
  top: -8%;
  right: -10%;
  width: min(720px, 64vw);
  color: var(--accent);
  opacity: 0.13;
  pointer-events: none;
  z-index: 0;
}
.hero .wrap { position: relative; z-index: 1; }

.hero__eyebrow { margin-bottom: clamp(24px, 4vh, 40px); }
.hero__title {
  font-family: var(--f-display);
  font-weight: 400;
  font-size: var(--step-4);
  line-height: 1.02;
  letter-spacing: -0.02em;
  max-width: 17ch;
}
.hero__title em { font-style: italic; color: var(--accent); }
.hero__lead {
  margin-top: clamp(24px, 4vh, 40px);
  max-width: 54ch;
  font-size: var(--step-1);
  line-height: 1.5;
  color: var(--ink-soft);
  font-weight: 400;
}
.hero__meta {
  margin-top: clamp(32px, 5vh, 52px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.4rem 2.4rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--line);
  font-size: var(--step--1);
  letter-spacing: 0.04em;
  color: var(--ink-faint);
}
.hero__meta strong { color: var(--ink); font-weight: 600; }

.btn-text {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-weight: 600;
  color: var(--accent);
  font-size: var(--step-0);
}
.btn-text .arrow { transition: transform 0.3s cubic-bezier(0.2,0.7,0.2,1); }
.btn-text:hover .arrow { transform: translateX(5px); }

/* Generic section ---------------------------------------------------------- */
.section { padding-block: clamp(64px, 11vh, 130px); border-top: 1px solid var(--line); position: relative; }
.section__head { display: grid; gap: 1.4rem; margin-bottom: clamp(40px, 6vh, 72px); }
.section__title { font-family: var(--f-display); font-size: var(--step-3); max-width: 18ch; }
.section__title em { font-style: italic; color: var(--accent); }

.lede { font-size: var(--step-1); line-height: 1.5; color: var(--ink-soft); max-width: 56ch; }

/* "What we do" two-column -------------------------------------------------- */
.split { display: grid; grid-template-columns: 1fr; gap: clamp(32px, 5vw, 80px); align-items: start; }
@media (min-width: 880px) { .split { grid-template-columns: 0.95fr 1.05fr; } }
.split p + p { margin-top: 1.2em; }
.metrics { display: flex; flex-wrap: wrap; gap: 2.4rem 3rem; margin-top: 2.4rem; padding-top: 2rem; border-top: 1px solid var(--line-soft); }
.metric .n { font-family: var(--f-display); font-size: var(--step-2); color: var(--accent); display: block; line-height: 1; }
.metric .t { font-size: var(--step--1); color: var(--ink-faint); letter-spacing: 0.04em; margin-top: 0.5em; }

/* Approach cards ----------------------------------------------------------- */
.cards { display: grid; grid-template-columns: 1fr; gap: 1px; background: var(--line); border: 1px solid var(--line); }
@media (min-width: 760px) { .cards { grid-template-columns: repeat(3, 1fr); } }
.card { background: var(--paper); padding: clamp(28px, 3vw, 44px); display: flex; flex-direction: column; gap: 1rem; transition: background 0.3s ease; }
.card:hover { background: var(--paper-2); }
.card__no { font-family: var(--f-display); font-size: var(--step--1); color: var(--ochre); letter-spacing: 0.1em; }
.card__title { font-family: var(--f-display); font-size: var(--step-1); }
.card p { color: var(--ink-soft); font-size: 0.98rem; }

/* Products ----------------------------------------------------------------- */
.products { display: grid; grid-template-columns: 1fr; gap: 1.4rem; }
@media (min-width: 760px) { .products { grid-template-columns: 1.4fr 1fr; } }
.product {
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: clamp(28px, 3vw, 48px);
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-2) 100%);
  transition: transform 0.4s cubic-bezier(0.2,0.7,0.2,1), border-color 0.3s ease, box-shadow 0.4s ease;
}
.product:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: 0 24px 50px -34px rgba(31,63,46,0.55); }
.product--ghost { background: none; border-style: dashed; align-items: flex-start; justify-content: center; color: var(--ink-faint); }
.kicker {
  align-self: flex-start;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-tint);
  padding: 0.4em 0.9em;
  border-radius: 100px;
}
.product__title { font-family: var(--f-display); font-size: var(--step-2); line-height: 1.05; }
.product p { color: var(--ink-soft); }
.product .disclaim { font-size: 0.82rem; color: var(--ink-faint); font-style: italic; }
.product__link { margin-top: auto; }

/* Contact ------------------------------------------------------------------ */
.contact-grid { display: grid; grid-template-columns: 1fr; gap: 2rem 3rem; }
@media (min-width: 680px) { .contact-grid { grid-template-columns: repeat(2, 1fr); } }
.contact-item .k { font-size: var(--step--1); letter-spacing: 0.16em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 0.5em; }
.contact-item .v { font-family: var(--f-display); font-size: var(--step-1); }
.contact-item .v a { border-bottom: 1px solid var(--accent); color: var(--accent); }
.todo { color: var(--ochre); border-bottom: 1px dashed var(--ochre); font-style: italic; }

/* Footer ------------------------------------------------------------------- */
.foot { background: var(--accent-deep); color: var(--paper); padding-block: clamp(56px, 8vh, 96px); }
.foot a { color: var(--paper); opacity: 0.86; }
.foot a:hover { opacity: 1; }
.foot__top { display: grid; grid-template-columns: 1fr; gap: 2.5rem; align-items: start; }
@media (min-width: 760px) { .foot__top { grid-template-columns: 1.4fr 1fr; } }
.foot__brand { font-family: var(--f-display); font-size: var(--step-2); display: inline-flex; align-items: center; gap: 0.5em; }
.foot__brand .brand__mark { color: color-mix(in srgb, var(--paper) 88%, var(--accent)); }
.foot__tag { margin-top: 1rem; max-width: 40ch; opacity: 0.78; font-size: 0.96rem; }
.foot__links { display: flex; flex-wrap: wrap; gap: 0.9rem 1.6rem; font-size: var(--step--1); letter-spacing: 0.04em; }
.foot__legal {
  margin-top: clamp(40px, 6vh, 64px);
  padding-top: 1.8rem;
  border-top: 1px solid rgba(245,242,234,0.18);
  font-size: 0.82rem;
  line-height: 1.7;
  opacity: 0.72;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem 2rem;
}
.foot__legal p { max-width: 70ch; }

/* Page-load animation ------------------------------------------------------ */
.reveal { opacity: 0; transform: translateY(14px); animation: rise 0.9s cubic-bezier(0.16, 0.8, 0.3, 1) forwards; }
.reveal.d1 { animation-delay: 0.05s; }
.reveal.d2 { animation-delay: 0.16s; }
.reveal.d3 { animation-delay: 0.28s; }
.reveal.d4 { animation-delay: 0.40s; }
.reveal.d5 { animation-delay: 0.52s; }
@keyframes rise { to { opacity: 1; transform: none; } }

/* Scroll-in for sections */
.in-view { opacity: 0; transform: translateY(22px); transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.16,0.8,0.3,1); }
.in-view.is-visible { opacity: 1; transform: none; }

/* Sub-pages (legal) -------------------------------------------------------- */
.doc { padding-block: clamp(48px, 7vh, 90px); }
.doc__title { font-family: var(--f-display); font-size: var(--step-3); margin-bottom: 0.6rem; }
.doc__meta { color: var(--ink-faint); font-size: var(--step--1); letter-spacing: 0.04em; margin-bottom: clamp(32px, 5vh, 56px); padding-bottom: 1.4rem; border-bottom: 1px solid var(--line); }
.doc h2 { font-family: var(--f-display); font-size: var(--step-1); margin-top: 2.4rem; margin-bottom: 0.7rem; }
.doc p, .doc li { color: var(--ink-soft); max-width: 70ch; }
.doc p + p { margin-top: 1rem; }
.doc ul { margin: 1rem 0 1rem 1.3rem; display: grid; gap: 0.5rem; }
.doc .draft-note {
  background: var(--accent-tint);
  border-left: 3px solid var(--accent);
  padding: 1rem 1.2rem;
  border-radius: 4px;
  font-size: 0.9rem;
  color: var(--accent-deep);
  margin-bottom: 2rem;
}
.back-link { display: inline-flex; gap: 0.5em; margin-top: 3rem; color: var(--accent); font-weight: 600; font-size: var(--step--1); }

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

/* Hide inline nav links before they get cramped; brand + Contact CTA remain.
   720px was too low — links overlapped the CTA in the ~720–900px range. */
@media (max-width: 900px) {
  .nav__links { display: none; }
}