/* InsightStudios — i12s.com
   Shared tokens + base styles
   ------------------------------------------------------------------ */

:root {
  /* Brand — sampled from InsightStudios logo */
  --brand-navy:  #104080;    /* “INSIGHT” blue */
  --brand-green: #90C040;    /* “STUDIOS” lime */
  --brand-navy-deep: #0A2A55;
  --brand-green-deep: #5F8A1F;

  /* Ink / paper — navy-biased neutrals */
  --ink-900: #0A1B33;        /* near-black navy for body text */
  --ink-800: #102A4C;
  --ink-700: #1D3A66;
  --ink-500: #4A5C7A;
  --ink-400: #6E7C96;
  --ink-300: #A6AEC0;
  --ink-200: #D7DCE6;
  --ink-100: #ECEFF5;

  --paper:   #F6F7FA;        /* cool off-white */
  --paper-2: #EDEFF5;
  --paper-3: #E2E6EF;
  --white:   #FFFFFF;

  /* Primary accent — brand navy */
  --ochre:      var(--brand-navy);
  --ochre-ink:  var(--brand-navy-deep);
  --ochre-wash: #E3EBF7;

  /* Secondary accent — brand green */
  --lime:       var(--brand-green);
  --lime-ink:   var(--brand-green-deep);
  --lime-wash:  #EEF6DC;

  /* Support */
  --ink-blue: var(--brand-navy);

  /* Type */
  --font-display: 'Inter Tight', ui-sans-serif, system-ui, sans-serif;
  --font-body:    'Inter Tight', ui-sans-serif, system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, Menlo, monospace;

  /* Grid */
  --max:  1320px;
  --gutter: 32px;
  --col-gap: 24px;

  /* Motion */
  --ease: cubic-bezier(.2,.7,.2,1);
}

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

html {
  background: var(--paper);
  color: var(--ink-900);
  font-family: var(--font-body);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  font-size: 17px;
  line-height: 1.55;
  letter-spacing: -0.005em;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* --- Typography scale ---------------------------------------- */

.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-500);
  font-weight: 500;
}

.kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-400);
}

h1, .h1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(48px, 7vw, 104px);
  line-height: 0.96;
  letter-spacing: -0.035em;
  margin: 0;
  text-wrap: balance;
}

/* Headline emphasis — brand green italic. Use <em> inside h1/h2/h3
   to call out the key phrase. One emphasis per headline, max. */
h1 em, h2 em, h3 em,
.h1 em, .h2 em, .h3 em {
  font-style: italic;
  font-weight: inherit;
  color: var(--brand-green);
}
.inverse h1 em, .inverse h2 em, .inverse h3 em,
.inverse .h1 em, .inverse .h2 em, .inverse .h3 em {
  color: var(--brand-green);
}

h2, .h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(36px, 4.4vw, 64px);
  line-height: 1.02;
  letter-spacing: -0.028em;
  margin: 0;
  text-wrap: balance;
}

h3, .h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(24px, 2.2vw, 32px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0;
}

h4, .h4 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 19px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 0;
}

.lead {
  font-size: clamp(19px, 1.6vw, 22px);
  line-height: 1.45;
  color: var(--ink-700);
  letter-spacing: -0.01em;
  text-wrap: pretty;
  max-width: 62ch;
}

p { margin: 0 0 1em; color: var(--ink-800); text-wrap: pretty; }
p:last-child { margin-bottom: 0; }

/* --- Layout primitives ---------------------------------------- */

.container {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

section { padding: clamp(72px, 10vw, 140px) 0; }

hr.rule {
  border: 0;
  border-top: 1px solid var(--ink-200);
  margin: 0;
}

/* --- Buttons --------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 15px;
  letter-spacing: -0.005em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--ink-900); color: var(--paper); }
.btn-primary:hover { background: var(--ink-700); }
.btn-ghost { background: transparent; color: var(--ink-900); border-color: var(--ink-200); }
.btn-ghost:hover { border-color: var(--ink-900); }
.btn .arrow { transition: transform .25s var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

/* --- Nav ------------------------------------------------------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 82%, transparent);
  backdrop-filter: saturate(1.2) blur(12px);
  -webkit-backdrop-filter: saturate(1.2) blur(12px);
  border-bottom: 1px solid color-mix(in srgb, var(--ink-900) 8%, transparent);
}
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px var(--gutter);
  display: flex;
  align-items: center;
  gap: 40px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; }
.nav-links {
  display: flex; gap: 28px;
  margin-left: 24px;
  font-size: 15px;
  color: var(--ink-700);
}
.nav-links a {
  position: relative;
  padding: 6px 0;
  transition: color .2s var(--ease);
}
.nav-links a:hover { color: var(--ink-900); }
.nav-links a.active { color: var(--ink-900); }
.nav-links a.active::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 2px;
  background: var(--brand-green);
}
.nav-cta { margin-left: auto; }

/* --- Footer ---------------------------------------------------- */

.footer {
  background: var(--ink-900);
  color: var(--ink-200);
  padding: 80px 0 40px;
}
.footer a { color: var(--ink-200); }
.footer a:hover { color: var(--paper); }
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.4fr;
  gap: 48px;
  padding-bottom: 56px;
  border-bottom: 1px solid color-mix(in srgb, var(--paper) 10%, transparent);
}
.footer h5 {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-300);
  margin: 0 0 18px;
  font-weight: 500;
}
.footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; font-size: 15px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-400);
  letter-spacing: 0.02em;
}
.footer-bottom a { color: var(--ink-400); }
.newsletter {
  display: flex;
  border: 1px solid color-mix(in srgb, var(--paper) 20%, transparent);
  border-radius: 999px;
  overflow: hidden;
  max-width: 340px;
  margin-top: 8px;
}
.newsletter input {
  flex: 1;
  background: transparent;
  border: 0;
  color: var(--paper);
  padding: 12px 16px;
  font: inherit;
  font-size: 14px;
  outline: none;
}
.newsletter input::placeholder { color: var(--ink-400); }
.newsletter button {
  background: var(--paper);
  color: var(--ink-900);
  border: 0;
  padding: 10px 18px;
  font: inherit;
  font-weight: 500;
  font-size: 14px;
  cursor: pointer;
}
.social { display: flex; gap: 14px; margin-top: 18px; }
.social a {
  width: 36px; height: 36px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--paper) 20%, transparent);
  display: inline-flex; align-items: center; justify-content: center;
  transition: border-color .2s var(--ease), background .2s var(--ease);
}
.social a:hover { border-color: var(--paper); background: color-mix(in srgb, var(--paper) 8%, transparent); }

/* --- Utility / components ------------------------------------- */

.grid { display: grid; gap: var(--col-gap); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 920px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 28px 0;
}
.stat-num {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(44px, 5vw, 72px);
  letter-spacing: -0.035em;
  line-height: 0.95;
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-500);
  max-width: 24ch;
  line-height: 1.4;
}

.card {
  background: var(--white);
  border: 1px solid var(--ink-200);
  border-radius: 4px;
  padding: 32px;
  transition: border-color .2s var(--ease), transform .3s var(--ease);
}
.card:hover { border-color: var(--ink-700); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--lime-wash);
  color: var(--brand-navy-deep);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  border: 1px solid color-mix(in srgb, var(--lime) 45%, transparent);
}
.tag::before {
  content: '';
  width: 6px; height: 6px; border-radius: 99px;
  background: var(--lime);
}
.tag.tag-navy {
  background: var(--ochre-wash);
  color: var(--brand-navy-deep);
  border-color: color-mix(in srgb, var(--brand-navy) 30%, transparent);
}
.tag.tag-navy::before { background: var(--brand-navy); }

.section-head {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
  align-items: end;
  margin-bottom: clamp(40px, 6vw, 72px);
}
@media (max-width: 920px) {
  .section-head { grid-template-columns: 1fr; gap: 24px; }
}
.section-head .eyebrow { margin-bottom: 8px; }

/* Image placeholders / duotone photography */
.photo {
  position: relative;
  background: var(--ink-200);
  overflow: hidden;
  border-radius: 4px;
}
.photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  mix-blend-mode: luminosity;
  filter: contrast(1.05);
}
.photo.duotone::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg, color-mix(in srgb, var(--brand-navy) 80%, transparent), color-mix(in srgb, var(--brand-green) 30%, transparent));
  mix-blend-mode: multiply;
  pointer-events: none;
  z-index: 1;
}
.photo.duotone::after {
  content: '';
  position: absolute; inset: 0;
  background: var(--paper);
  mix-blend-mode: lighten;
  opacity: .08;
  pointer-events: none;
  z-index: 2;
}

/* Hero photo frame caption */
.photo-caption {
  position: absolute;
  left: 16px; bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper);
  mix-blend-mode: difference;
  z-index: 3;
}

/* Bordered list */
.b-list { list-style: none; padding: 0; margin: 0; }
.b-list > li {
  padding: 28px 0;
  border-top: 1px solid var(--ink-200);
  display: grid;
  grid-template-columns: 64px 1fr 1.4fr;
  gap: 32px;
  align-items: start;
}
.b-list > li:last-child { border-bottom: 1px solid var(--ink-200); }
.b-list .idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--ink-400);
  padding-top: 4px;
}
@media (max-width: 920px) {
  .b-list > li { grid-template-columns: 1fr; gap: 10px; }
}

/* Link with arrow */
.link-arrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 500;
  border-bottom: 1px solid var(--ink-200);
  padding-bottom: 4px;
  transition: border-color .2s var(--ease), gap .2s var(--ease);
}
.link-arrow:hover { border-color: var(--ink-900); gap: 14px; }

/* Inverse (dark) section */
.inverse {
  background: var(--ink-900);
  color: var(--paper);
}
.inverse .eyebrow, .inverse .kicker { color: var(--ink-300); }
.inverse .lead { color: var(--ink-200); }
.inverse p { color: var(--ink-200); }
.inverse .btn-ghost { color: var(--paper); border-color: color-mix(in srgb, var(--paper) 30%, transparent); }
.inverse .btn-ghost:hover { border-color: var(--paper); }
.inverse .btn-primary { background: var(--paper); color: var(--ink-900); }
.inverse hr.rule { border-color: color-mix(in srgb, var(--paper) 15%, transparent); }
.inverse .b-list > li { border-color: color-mix(in srgb, var(--paper) 12%, transparent); }
.inverse .b-list > li:last-child { border-bottom-color: color-mix(in srgb, var(--paper) 12%, transparent); }
.inverse .tag {
  background: color-mix(in srgb, var(--brand-green) 22%, transparent);
  color: var(--paper);
  border-color: color-mix(in srgb, var(--brand-green) 55%, transparent);
}
.inverse .tag::before { background: var(--brand-green); }
.inverse .tag.tag-navy {
  background: color-mix(in srgb, var(--brand-navy) 40%, transparent);
  border-color: color-mix(in srgb, var(--paper) 30%, transparent);
  color: var(--paper);
}
.inverse .tag.tag-navy::before { background: var(--paper); }
.inverse .stat-label { color: var(--ink-300); }

/* Responsive */
@media (max-width: 780px) {
  .nav-links { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}