/* ============================================================
   Xveave — xveave.com
   Tokens: paper/ink base, indigo (warp) + copper (weft) accents
   Type: Space Grotesk (display) · IBM Plex Sans (body) · IBM Plex Mono (labels)
   ============================================================ */

:root {
  --paper: #FAFAF7;
  --ink: #16181D;
  --muted: #565B64;
  --indigo: #2D3A8C;
  --indigo-deep: #232E73;
  --copper: #B8742D;
  --line: #E2E2DB;
  --card: #FFFFFF;
  --max: 1100px;
  --display: "Space Grotesk", "Segoe UI", sans-serif;
  --body: "IBM Plex Sans", "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--indigo); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--indigo);
  outline-offset: 2px;
}

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */

.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 250, 247, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: var(--max); margin: 0 auto; padding: 14px 24px;
}

.brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--display); font-weight: 700; font-size: 1.25rem;
  letter-spacing: 0.01em; color: var(--ink);
}
.brand:hover { text-decoration: none; }
.brand svg { display: block; }

.nav-toggle { display: none; }
.nav-toggle-label { display: none; cursor: pointer; padding: 8px; }
.nav-toggle-label span {
  display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.site-nav { display: flex; align-items: center; gap: 26px; }
.site-nav > a, .nav-group > a {
  font-size: 0.95rem; color: var(--ink); font-weight: 500;
}
.site-nav > a:hover, .nav-group > a:hover { color: var(--indigo); text-decoration: none; }
.site-nav > a[aria-current="page"], .nav-group > a[aria-current="page"] {
  color: var(--indigo);
  border-bottom: 2px solid var(--copper);
  padding-bottom: 2px;
}

.nav-group { position: relative; }
.nav-group > a::after { content: " ▾"; font-size: 0.7em; color: var(--muted); }
.nav-drop {
  position: absolute; top: calc(100% + 10px); left: -12px;
  background: var(--card); border: 1px solid var(--line); border-radius: 8px;
  box-shadow: 0 10px 30px rgba(22, 24, 29, 0.10);
  min-width: 280px; padding: 8px;
  opacity: 0; visibility: hidden; transform: translateY(-4px);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s;
}
.nav-group:hover .nav-drop, .nav-group:focus-within .nav-drop {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.nav-drop a {
  display: block; padding: 9px 12px; border-radius: 6px;
  color: var(--ink); font-size: 0.92rem;
}
.nav-drop a:hover { background: #F1F1EB; text-decoration: none; color: var(--indigo); }
.nav-drop a strong { display: block; font-weight: 600; }
.nav-drop a small { color: var(--muted); font-size: 0.8rem; }

.nav-cta {
  font-family: var(--mono); font-size: 0.85rem !important;
  border: 1.5px solid var(--indigo); border-radius: 6px;
  padding: 7px 14px; color: var(--indigo) !important;
}
.nav-cta:hover { background: var(--indigo); color: #fff !important; }

/* ---------- Eyebrow + section scaffolding ---------- */

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 0.78rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--muted);
  margin-bottom: 18px;
}
.eyebrow svg { flex: none; }

.section { padding: 84px 0; }
.section + .section { border-top: 1px solid var(--line); }
.section h2 {
  font-family: var(--display); font-size: clamp(1.6rem, 3.2vw, 2.2rem);
  line-height: 1.2; letter-spacing: -0.01em; margin-bottom: 22px; max-width: 720px;
}
.section .lede { font-size: 1.15rem; color: var(--muted); max-width: 700px; margin-bottom: 12px; }
.section p + p { margin-top: 14px; }
.prose { max-width: 720px; }
.prose .pull {
  font-family: var(--display); font-size: 1.3rem; line-height: 1.45;
  color: var(--indigo-deep); border-left: 3px solid var(--copper);
  padding-left: 18px; margin: 26px 0;
}

/* ---------- Hero ---------- */

.hero { position: relative; padding: 110px 0 96px; overflow: hidden; }
.hero-weave {
  position: absolute; inset: 0; pointer-events: none; z-index: 0;
}
.hero-inner { position: relative; z-index: 1; max-width: 820px; }
.hero h1 {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(2.3rem, 6vw, 4rem); line-height: 1.08; letter-spacing: -0.02em;
}
.hero h1 .accent { color: var(--indigo); }
.hero .sub {
  margin-top: 24px; font-size: 1.2rem; line-height: 1.6; color: var(--muted); max-width: 640px;
}
.hero-ctas { margin-top: 36px; display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block; font-family: var(--display); font-weight: 600;
  font-size: 1rem; padding: 13px 26px; border-radius: 8px;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--indigo); color: #fff; }
.btn-primary:hover { background: var(--indigo-deep); box-shadow: 0 6px 18px rgba(45, 58, 140, 0.25); }
.btn-ghost { border: 1.5px solid var(--ink); color: var(--ink); }
.btn-ghost:hover { border-color: var(--indigo); color: var(--indigo); }

@media (prefers-reduced-motion: no-preference) {
  .hero-weave path { stroke-dasharray: 2400; stroke-dashoffset: 2400; animation: weave-in 2.4s ease forwards; }
  .hero-weave path.weft { animation-delay: 0.35s; }
  @keyframes weave-in { to { stroke-dashoffset: 0; } }
}

/* ---------- Cards ---------- */

.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 28px 26px; display: flex; flex-direction: column;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}
a.card { color: var(--ink); }
a.card:hover {
  text-decoration: none; border-color: var(--indigo);
  box-shadow: 0 10px 28px rgba(22, 24, 29, 0.07); transform: translateY(-2px);
}
.card h3 {
  font-family: var(--display); font-size: 1.18rem; margin-bottom: 10px; letter-spacing: -0.01em;
}
.card p { font-size: 0.97rem; color: var(--muted); }
.card .more { margin-top: auto; padding-top: 16px; font-weight: 600; font-size: 0.92rem; color: var(--indigo); }
a.card:hover .more::after { content: " →"; }

.tag {
  align-self: flex-start;
  font-family: var(--mono); font-size: 0.7rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--copper); border: 1px solid currentColor; border-radius: 99px;
  padding: 3px 10px; margin-bottom: 14px;
}
.tag.pillar { color: var(--indigo); }

/* ---------- Bands ---------- */

.band {
  background: var(--indigo-deep); color: #fff; padding: 76px 0;
}
.band h2 { font-family: var(--display); font-size: clamp(1.5rem, 3vw, 2rem); max-width: 760px; line-height: 1.35; }
.band .eyebrow { color: rgba(255, 255, 255, 0.65); }
.band p { color: rgba(255, 255, 255, 0.82); max-width: 700px; margin-top: 16px; }
.band .btn-primary { background: #fff; color: var(--indigo-deep); margin-top: 30px; }
.band .btn-primary:hover { background: var(--paper); }

/* ---------- Lists ---------- */

.checklist { list-style: none; max-width: 760px; }
.checklist li {
  padding: 14px 0 14px 34px; position: relative; border-bottom: 1px solid var(--line);
}
.checklist li:last-child { border-bottom: none; }
.checklist li::before {
  content: ""; position: absolute; left: 0; top: 21px;
  width: 16px; height: 16px;
  background:
    linear-gradient(45deg, transparent 44%, var(--copper) 44%, var(--copper) 56%, transparent 56%),
    linear-gradient(-45deg, transparent 44%, var(--indigo) 44%, var(--indigo) 56%, transparent 56%);
}

/* ---------- Page hero (inner pages) ---------- */

.page-hero { padding: 76px 0 56px; border-bottom: 1px solid var(--line); }
.page-hero h1 {
  font-family: var(--display); font-size: clamp(2rem, 4.5vw, 3rem);
  line-height: 1.12; letter-spacing: -0.02em; max-width: 780px;
}
.page-hero .lede { margin-top: 18px; font-size: 1.18rem; color: var(--muted); max-width: 700px; }

.breadcrumb { font-family: var(--mono); font-size: 0.8rem; color: var(--muted); margin-bottom: 22px; }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--indigo); }

/* ---------- Detail blocks (innovation pages) ---------- */

.kv { display: grid; grid-template-columns: 180px 1fr; gap: 10px 28px; max-width: 820px; }
.kv dt { font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); padding-top: 4px; }
.kv dd p + p { margin-top: 10px; }

/* ---------- Contact form ---------- */

.contact-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 56px; align-items: start; }

.form-field { margin-bottom: 20px; }
.form-field label {
  display: block; font-family: var(--mono); font-size: 0.78rem;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin-bottom: 8px;
}
.form-field input, .form-field textarea {
  width: 100%; font-family: var(--body); font-size: 1rem; color: var(--ink);
  background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px;
}
.form-field input:focus, .form-field textarea:focus { border-color: var(--indigo); outline: none; }
.form-field textarea { min-height: 150px; resize: vertical; }

.contact-aside { border-left: 1px solid var(--line); padding-left: 36px; }
.contact-aside h3 { font-family: var(--display); font-size: 1.05rem; margin: 22px 0 6px; }
.contact-aside h3:first-child { margin-top: 0; }
.contact-aside p { color: var(--muted); font-size: 0.96rem; }

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

.site-footer { border-top: 1px solid var(--line); padding: 56px 0 40px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; }
.footer-grid .brand { font-size: 1.1rem; margin-bottom: 12px; }
.site-footer p { font-size: 0.92rem; color: var(--muted); max-width: 340px; }
.site-footer h4 {
  font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--muted); margin-bottom: 12px;
}
.site-footer ul { list-style: none; }
.site-footer ul li { margin-bottom: 8px; }
.site-footer ul a { color: var(--ink); font-size: 0.95rem; }
.site-footer ul a:hover { color: var(--indigo); }
.footer-base {
  margin-top: 44px; padding-top: 20px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-family: var(--mono); font-size: 0.78rem; color: var(--muted);
}

/* ---------- Responsive ---------- */

@media (max-width: 920px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .kv { grid-template-columns: 1fr; gap: 4px 0; }
  .kv dt { padding-top: 16px; }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-aside { border-left: none; padding-left: 0; border-top: 1px solid var(--line); padding-top: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 700px) {
  .section { padding: 60px 0; }
  .hero { padding: 72px 0 64px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }

  .nav-toggle-label { display: block; }
  .site-nav {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--line);
    max-height: 0; overflow: hidden; transition: max-height 0.25s ease;
  }
  .nav-toggle:checked ~ .site-nav { max-height: 520px; }
  .site-nav > a, .nav-group > a { padding: 14px 24px; border-top: 1px solid var(--line); display: block; }
  .site-nav > a[aria-current="page"], .nav-group > a[aria-current="page"] { border-bottom: none; }
  .nav-group .nav-drop {
    position: static; opacity: 1; visibility: visible; transform: none;
    border: none; box-shadow: none; border-radius: 0; background: #F1F1EB; padding: 0 0 8px;
  }
  .nav-drop a { padding: 10px 24px 10px 40px; }
  .nav-cta { margin: 14px 24px; text-align: center; }
  .footer-grid { grid-template-columns: 1fr; }
}