/* ==========================================================================
   UNCHARTED AI — Design System
   Source of truth: Brand Identity Guide v2.0
   Fonts: Cormorant Garamond (display) · DM Sans (body/UI) · DM Mono (labels)
   ========================================================================== */

/* ---- Design Tokens ------------------------------------------------------ */
:root {
  /* Color — nautical depth */
  --ink:       #0D1F2D;  /* primary text, deep/hero backgrounds, logo center */
  --navy:      #1A3A52;  /* brand primary, headers, premium backgrounds */
  --horizon:   #2C5F82;  /* dividers, secondary UI, shadow facets */
  --current:   #3D8BBF;  /* links, interactive, hover */
  --seafoam:   #7EC8C8;  /* accent, highlight on dark, the italic "AI" */
  --brass:     #C49A3C;  /* premium accent + primary CTA (reserved, 1/page) */
  --salt:      #F0EDE8;  /* light text on dark */
  --parchment: #FAF8F4;  /* page background — NEVER pure white */

  /* Tints (derived, for surfaces/borders only) */
  --ink-90:    rgba(13, 31, 45, 0.90);
  --navy-08:   rgba(26, 58, 82, 0.08);
  --horizon-15:rgba(44, 95, 130, 0.15);
  --salt-70:   rgba(240, 237, 232, 0.70);
  --salt-55:   rgba(240, 237, 232, 0.55);

  /* Type */
  --font-display: "Cormorant Garamond", Georgia, serif;
  --font-body:    "DM Sans", system-ui, -apple-system, sans-serif;
  --font-mono:    "DM Mono", ui-monospace, "SF Mono", monospace;

  /* Spacing scale (8pt rhythm) */
  --s-1: 0.5rem;  --s-2: 1rem;   --s-3: 1.5rem;  --s-4: 2rem;
  --s-5: 3rem;    --s-6: 4rem;   --s-7: 6rem;    --s-8: 8rem;

  /* Layout */
  --maxw: 1120px;
  --maxw-narrow: 760px;
  --radius: 10px;
  --radius-lg: 16px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 220ms;

  /* Z-index scale */
  --z-nav: 100;
  --z-overlay: 1000;
}

/* ---- Reset --------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--parchment);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--current); text-decoration: none; transition: color var(--dur) var(--ease); }
a:hover { color: var(--navy); }
button { font-family: inherit; cursor: pointer; }
ul { list-style: none; padding: 0; }

/* Visible focus for keyboard users */
:focus-visible { outline: 3px solid var(--current); outline-offset: 3px; border-radius: 4px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* ---- Typography ---------------------------------------------------------- */
h1, h2, h3 { font-family: var(--font-display); font-weight: 400; line-height: 1.12; letter-spacing: -0.01em; color: var(--ink); }
h1 { font-size: clamp(2.6rem, 6vw, 4.4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.4rem, 2.4vw, 1.9rem); }
h4 { font-family: var(--font-body); font-size: 1.1rem; font-weight: 500; line-height: 1.3; }
.display-italic { font-style: italic; color: var(--seafoam); }
p { max-width: 68ch; }

/* Eyebrow / label — DM Mono, always uppercase + letter-spaced */
.eyebrow {
  font-family: var(--font-mono); font-weight: 400;
  font-size: 0.75rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--horizon); margin-bottom: var(--s-2);
}
.on-dark .eyebrow, .bg-ink .eyebrow, .bg-navy .eyebrow, .bg-depth .eyebrow { color: var(--seafoam); }

.lead { font-size: clamp(1.15rem, 1.8vw, 1.4rem); line-height: 1.6; color: var(--navy); }
.on-dark .lead, .bg-ink .lead, .bg-navy .lead, .bg-depth .lead { color: var(--salt-70); }

/* Pull quote */
.pullquote {
  font-family: var(--font-display); font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  font-style: italic; line-height: 1.35; color: var(--navy); max-width: 22ch;
}
.on-dark .pullquote, .bg-ink .pullquote, .bg-navy .pullquote, .bg-depth .pullquote { color: var(--salt); }

/* ---- Layout helpers ------------------------------------------------------ */
.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--s-3); }
.narrow { max-width: var(--maxw-narrow); }
.section { padding-block: clamp(var(--s-6), 9vw, var(--s-8)); }
.section-sm { padding-block: var(--s-6); }
.center { text-align: center; }
.center p, .center .lead { margin-inline: auto; }
.center h1, .center h2, .center h3 { margin-inline: auto; }
.stack > * + * { margin-top: var(--s-3); }

/* Surfaces */
.bg-ink   { background: var(--ink);   color: var(--salt); }
.bg-navy  { background: var(--navy);  color: var(--salt); }
.bg-parchment { background: var(--parchment); }
.on-dark, .bg-ink, .bg-navy, .bg-depth { color: var(--salt); }
.on-dark h1, .on-dark h2, .on-dark h3,
.bg-ink h1, .bg-ink h2, .bg-ink h3,
.bg-navy h1, .bg-navy h2, .bg-navy h3,
.bg-depth h1, .bg-depth h2, .bg-depth h3 { color: var(--salt); }

/* Subtle nautical-depth gradient for hero (NOT a glow — depth) */
.bg-depth {
  background: radial-gradient(120% 120% at 50% 0%, var(--navy) 0%, var(--ink) 62%);
  color: var(--salt);
}

/* Section divider */
.divider { height: 1px; background: var(--horizon-15); border: 0; }
.divider-brass { height: 2px; width: 56px; background: var(--brass); border: 0; }

/* ---- Buttons ------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-body); font-weight: 500; font-size: 1rem;
  padding: 0.85rem 1.6rem; border-radius: var(--radius); border: 1.5px solid transparent;
  min-height: 48px; transition: transform var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn:active { transform: scale(0.98); }
/* Primary CTA — the one Brass moment per page */
.btn-primary { background: var(--brass); color: var(--ink); }
.btn-primary:hover { background: #d4a948; color: var(--ink); }
/* Secondary on dark */
.btn-ghost { background: transparent; color: var(--salt); border-color: var(--salt-55); }
.btn-ghost:hover { border-color: var(--seafoam); color: var(--seafoam); }
/* Secondary on light */
.btn-outline { background: transparent; color: var(--navy); border-color: var(--horizon); }
.btn-outline:hover { background: var(--navy); color: var(--salt); }

/* ---- Navigation ---------------------------------------------------------- */
.nav {
  position: sticky; top: 0; z-index: var(--z-nav);
  background: var(--ink-90); backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid rgba(240,237,232,0.08);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: var(--s-3); min-height: 68px; }
.brand { display: flex; align-items: center; gap: 0.6rem; }
.brand svg, .brand .brand-mark { width: 30px; height: 30px; object-fit: contain; }
.brand-word { font-family: var(--font-display); font-size: 1.5rem; color: var(--salt); line-height: 1; }
.brand-word em { color: var(--seafoam); font-style: italic; }

.nav-links { display: flex; align-items: center; gap: var(--s-3); }
.nav-primary, .nav-corner { display: flex; align-items: center; gap: var(--s-3); }
.nav-corner { padding-left: var(--s-3); border-left: 1px solid rgba(240,237,232,0.14); }
.nav-link {
  font-family: var(--font-body); font-size: 0.95rem; color: var(--salt-70);
  padding: 0.4rem 0; position: relative;
}
.nav-link:hover { color: var(--salt); }
.nav-link.is-active { color: var(--seafoam); }
.nav-link.is-active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -6px; height: 2px; background: var(--seafoam);
}
.nav-corner .nav-link { font-size: 0.85rem; color: var(--salt-55); }
.nav-cta { margin-left: var(--s-2); padding: 0.6rem 1.1rem; min-height: 42px; font-size: 0.9rem; }

.nav-toggle { display: none; background: none; border: 0; color: var(--salt); padding: 0.5rem; }
.nav-toggle svg { width: 26px; height: 26px; }

@media (max-width: 920px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    position: fixed; inset: 68px 0 auto 0; flex-direction: column; align-items: stretch;
    gap: 0; background: var(--ink); padding: var(--s-2) var(--s-3) var(--s-4);
    border-bottom: 1px solid rgba(240,237,232,0.1);
    transform: translateY(-12px); opacity: 0; pointer-events: none; transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  }
  .nav-links.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-primary, .nav-corner { flex-direction: column; align-items: stretch; gap: 0; border: 0; padding: 0; }
  .nav-corner { border-top: 1px solid rgba(240,237,232,0.14); margin-top: var(--s-1); padding-top: var(--s-1); }
  .nav-link { padding: 0.9rem 0; font-size: 1.05rem; }
  .nav-cta { margin: var(--s-2) 0 0; justify-content: center; }
}

/* ---- Hero ---------------------------------------------------------------- */
.hero { padding-block: clamp(var(--s-6), 12vw, 9rem); }
.hero .mark { width: 76px; height: 76px; margin-bottom: var(--s-3); }
.hero h1 { max-width: 18ch; }

/* Nautical-chart grid over the navy hero — fades toward the edges like a map */
.hero.bg-depth { position: relative; overflow: hidden; }
.hero.bg-depth::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(126, 200, 200, 0.10) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(126, 200, 200, 0.10) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(120% 100% at 50% 32%, #000 0%, rgba(0,0,0,0.35) 55%, transparent 78%);
          mask-image: radial-gradient(120% 100% at 50% 32%, #000 0%, rgba(0,0,0,0.35) 55%, transparent 78%);
  pointer-events: none;
}
.hero.bg-depth .wrap { position: relative; z-index: 1; }

/* ---- Cards / grids ------------------------------------------------------- */
.grid { display: grid; gap: var(--s-3); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(2, 1fr); }
@media (min-width: 860px) { .grid-4 { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 740px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

.card {
  background: #fff; border: 1px solid var(--horizon-15); border-radius: var(--radius-lg);
  padding: var(--s-4); transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.card-num { font-family: var(--font-mono); font-size: 0.8rem; letter-spacing: 0.12em; color: var(--brass); }
.card h3 { font-size: 1.4rem; margin-block: 0.6rem 0.5rem; }
.card p { font-size: 0.98rem; color: var(--navy); }
.card.on-dark { background: rgba(240,237,232,0.04); border-color: rgba(240,237,232,0.12); }
.card.on-dark p { color: var(--salt-70); }

/* Offer tagline + closing line (What We Do) */
.offer-tag {
  font-family: var(--font-display); font-style: italic;
  font-size: 1.3rem; line-height: 1.35; color: var(--navy);
}
.offer-close { color: var(--horizon); font-weight: 500; }

/* Founder LinkedIn link (About page) */
.li-link {
  display: inline-flex; align-items: center; gap: 0.45rem; margin-top: 0.7rem;
  font-family: var(--font-body); font-size: 0.9rem; font-weight: 500;
  color: var(--horizon); text-decoration: none; transition: color var(--dur) var(--ease);
}
.li-link svg { width: 18px; height: 18px; }
.li-link:hover { color: var(--current); }

/* Numbered process steps */
.steps { counter-reset: step; display: grid; gap: var(--s-3); }
.step { display: grid; grid-template-columns: auto 1fr; gap: var(--s-3); align-items: start; }
.step-n {
  counter-increment: step; font-family: var(--font-display); font-size: 2rem; color: var(--horizon);
  width: 2.6rem; text-align: center; line-height: 1;
}
.step-n::before { content: counter(step, decimal-leading-zero); }

/* ---- Forms --------------------------------------------------------------- */
.form { display: grid; gap: var(--s-3); max-width: 520px; }
.form-field { display: flex; flex-direction: column; gap: 0.45rem; }
.form-field label { font-weight: 500; color: var(--ink); }
.form-field input,
.form-field textarea {
  width: 100%; padding: 0.8rem 1rem; font: inherit; color: var(--ink);
  background: #fff; border: 1.5px solid var(--horizon); border-radius: var(--radius);
}
.form-field input { min-height: 48px; }
.form-field textarea { min-height: 150px; resize: vertical; }
.form-field input:focus,
.form-field textarea:focus { border-color: var(--current); outline-offset: 1px; }

/* ---- Footer -------------------------------------------------------------- */
.footer { background: var(--ink); color: var(--salt-70); padding-block: var(--s-6) var(--s-4); }
.footer .brand-word { font-size: 1.6rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: var(--s-4); margin-bottom: var(--s-5); }
@media (max-width: 740px) { .footer-grid { grid-template-columns: 1fr; gap: var(--s-3); } }
.footer-tag { font-family: var(--font-display); font-style: italic; font-size: 1.15rem; color: var(--salt); margin-top: var(--s-2); }
.footer h5 { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--seafoam); margin-bottom: var(--s-2); }
.footer-links a { display: block; color: var(--salt-70); padding: 0.3rem 0; font-size: 0.95rem; }
.footer-links a:hover { color: var(--seafoam); }
.footer-social { display: flex; gap: 1rem; margin-top: var(--s-3); }
.footer-social a { color: var(--salt-55); display: inline-flex; transition: color var(--dur) var(--ease); }
.footer-social a:hover { color: var(--seafoam); }
.footer-social svg { width: 20px; height: 20px; }
.footer-bottom { border-top: 1px solid rgba(240,237,232,0.1); padding-top: var(--s-3); display: flex; flex-wrap: wrap; gap: var(--s-2); justify-content: space-between; }
.footer-bottom span { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.1em; color: var(--salt-55); }

/* ---- Placeholder copy flag (for Scotti — remove when real copy lands) ---- */
.copy-todo { /* marks placeholder copy; harmless styling */ }
[data-copy="placeholder"] { /* hook for find/replace */ }

/* ---- Utility ------------------------------------------------------------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.maxw-prose { max-width: 60ch; }
.skip-link {
  position: absolute; left: -9999px; top: 0; background: var(--brass); color: var(--ink);
  padding: 0.6rem 1rem; z-index: var(--z-overlay); border-radius: 0 0 var(--radius) 0;
}
.skip-link:focus { left: 0; }