/* ============================================================
   Anvaya Synapse — shared stylesheet (v2, premium refresh)
   Palette: deep violet-black, brand violet, brand orange (deepened),
   a muted brass accent for quiet "premium" detailing.
   Type: Fraunces (display, editorial serif) + IBM Plex Sans (body/UI)
   ============================================================ */

:root {
  --ink: #0C0A16;
  --ink-soft: #55506B;
  --paper: #FBFAF7;
  --paper-dim: #F3F0EA;
  --violet-black: #150A33;
  --violet-deep: #2A1060;
  --violet: #5614C5;
  --violet-mid: #7B42D6;
  --violet-tint: #EFE9FA;
  --orange: #E35F00;
  --orange-deep: #B84A00;
  --brass: #B0862E;
  --brass-light: #D9B96A;
  --line: #E4DFD2;
  --line-strong: #CFC6B0;
  --line-on-dark: rgba(255,255,255,0.14);

  --font-display: "Fraunces", "Georgia", serif;
  --font-body: "IBM Plex Sans", "Segoe UI", sans-serif;

  --maxw: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--ink);
  line-height: 1.1;
  margin: 0 0 0.5em 0;
  font-weight: 500;
  letter-spacing: -0.01em;
  font-optical-sizing: auto;
}

h1 { font-size: clamp(2.6rem, 4.6vw, 4.1rem); font-weight: 500; }
h2 { font-size: clamp(1.8rem, 2.7vw, 2.5rem); }
h3 { font-size: 1.3rem; font-weight: 600; font-family: var(--font-body); letter-spacing: -0.005em; }

p { margin: 0 0 1em 0; max-width: 62ch; color: var(--ink-soft); }

a { color: var(--violet); text-decoration: none; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
}

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

.rule-gold {
  width: 46px; height: 2px;
  background: linear-gradient(90deg, var(--brass), var(--brass-light));
  margin-bottom: 20px;
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.01em;
  padding: 14px 28px;
  border-radius: 1px;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}
.btn-primary {
  background: var(--orange);
  color: #fff;
  box-shadow: 0 1px 0 rgba(0,0,0,0.05);
}
.btn-primary:hover { background: var(--orange-deep); transform: translateY(-1px); }
.btn-ghost {
  background: transparent;
  border-color: var(--violet);
  color: var(--violet);
}
.btn-ghost:hover { background: var(--violet); color: #fff; }
.btn-ghost-light {
  background: transparent;
  border-color: rgba(255,255,255,0.4);
  color: #fff;
}
.btn-ghost-light:hover { background: rgba(255,255,255,0.1); border-color: #fff; }

/* ---------- header ---------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(251,250,247,0.92);
  backdrop-filter: blur(6px);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 13px;
}
.brand img { height: 40px; width: auto; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text .name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.15rem;
  color: var(--ink);
  letter-spacing: 0.01em;
}
.brand-text .tag {
  font-size: 0.64rem;
  color: var(--brass);
  letter-spacing: 0.09em;
  margin-top: 1px;
}
nav.main-nav { display: flex; align-items: center; gap: 34px; }
nav.main-nav a {
  color: var(--ink);
  font-size: 0.93rem;
  font-weight: 500;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
}
nav.main-nav a:hover, nav.main-nav a.active {
  border-bottom-color: var(--brass);
  color: var(--violet-deep);
}
.nav-cta { display: flex; align-items: center; gap: 16px; }
.menu-toggle {
  display: none;
  width: 38px; height: 34px;
  border: 1.5px solid var(--line-strong);
  background: transparent;
  padding: 0;
  cursor: pointer;
  position: relative;
}
.menu-toggle span, .menu-toggle span::before, .menu-toggle span::after {
  content: "";
  position: absolute;
  left: 9px; right: 9px;
  height: 2px;
  background: var(--ink);
}
.menu-toggle span { top: 16px; }
.menu-toggle span::before { top: -6px; }
.menu-toggle span::after { top: 6px; }

/* ---------- hero ---------- */
.hero {
  padding: 90px 0 100px;
  overflow: hidden;
  position: relative;
  background: var(--paper);
}
.hero .wrap {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero .eyebrow-line {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--brass);
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  margin-bottom: 22px;
}
.hero .eyebrow-line span.dot {
  width: 5px; height: 5px;
  background: var(--brass);
  display: inline-block;
}
.hero h1 { margin-bottom: 26px; }
.hero p.lead { font-size: 1.15rem; max-width: 48ch; }
.hero .cta-row { display: flex; gap: 16px; margin-top: 34px; flex-wrap: wrap; }

.hero-art {
  position: relative;
  aspect-ratio: 4 / 4.5;
  background: linear-gradient(160deg, var(--violet-black) 0%, var(--violet-deep) 42%, var(--violet) 70%, var(--orange) 100%);
  clip-path: polygon(16% 0, 100% 0, 100% 100%, 0 100%);
}
.hero-art::before {
  content: "";
  position: absolute; inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.16) 1px, transparent 0);
  background-size: 28px 28px;
  opacity: 0.5;
}
.hero-art .mark-wrap {
  position: absolute;
  bottom: 9%;
  left: 12%;
  right: 12%;
}
.hero-art .rule-gold-light {
  width: 40px; height: 1.5px;
  background: var(--brass-light);
  margin-bottom: 18px;
}
.hero-art .mark {
  color: #fff;
  font-family: var(--font-display);
}
.hero-art .mark .stat { font-size: 2.5rem; font-weight: 500; }
.hero-art .mark .stat-label { font-size: 0.85rem; opacity: 0.82; max-width: 26ch; font-family: var(--font-body); margin-top: 6px; }

/* ---------- section shells ---------- */
section { padding: 96px 0; }
.section-tight { padding: 68px 0; }
.section-head { max-width: 640px; margin-bottom: 52px; }
.section-head p { font-size: 1.06rem; }
.section-head .kicker {
  color: var(--brass);
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  margin-bottom: 14px;
}

.on-violet {
  background: var(--violet-black);
  color: #fff;
  position: relative;
}
.on-violet h2, .on-violet h3 { color: #fff; }
.on-violet p { color: rgba(255,255,255,0.72); }
.on-violet .section-head .kicker { color: var(--brass-light); }

.on-tint { background: var(--paper-dim); }

/* ---------- pillars / panel grid ---------- */
.panel-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.panel {
  background: var(--paper);
  padding: 40px 34px;
  position: relative;
  transition: background 0.2s ease;
}
.panel .rule-gold { margin-bottom: 22px; }
.panel p { font-size: 0.97rem; margin-bottom: 0; }

/* ---------- product / list rows ---------- */
.spec-row {
  display: grid;
  grid-template-columns: 230px 1fr 260px;
  gap: 44px;
  padding: 44px 0;
  border-top: 1px solid var(--line);
  align-items: start;
}
.spec-row:last-child { border-bottom: 1px solid var(--line); }
.spec-row .tier-label {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.7rem;
  color: var(--violet-deep);
}
.spec-row .tier-sub { color: var(--brass); font-size: 0.85rem; margin-top: 6px; letter-spacing: 0.02em; }
.spec-row .specs { display: flex; flex-direction: column; gap: 9px; }
.spec-row .specs .spec-item {
  display: flex; justify-content: space-between;
  font-size: 0.87rem; border-bottom: 1px dotted var(--line-strong);
  padding-bottom: 7px; color: var(--ink-soft);
}
.spec-row .specs .spec-item b { color: var(--ink); font-weight: 600; }

/* ---------- audience grid ---------- */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.audience-card {
  background: var(--paper);
  padding: 30px 26px;
}
.audience-card .idx {
  font-family: var(--font-display);
  color: var(--line-strong);
  font-weight: 500;
  font-size: 1.9rem;
  margin-bottom: 16px;
}
.audience-card h3 { font-size: 1.05rem; margin-bottom: 9px; }
.audience-card p { font-size: 0.9rem; margin: 0; }

/* ---------- split feature ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 68px;
  align-items: center;
}
.split.reverse { direction: rtl; }
.split.reverse > * { direction: ltr; }
.feature-diagram {
  border: 1px solid var(--line-strong);
  background: var(--paper);
  padding: 34px;
}
.on-violet .feature-diagram { border-color: var(--line-on-dark); background: rgba(255,255,255,0.03); }
.feature-diagram .node-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 28px 0;
}
.feature-diagram .node {
  text-align: center;
  font-size: 0.78rem;
  color: var(--ink-soft);
  width: 96px;
}
.on-violet .feature-diagram .node { color: rgba(255,255,255,0.68); }
.feature-diagram .node .box {
  width: 62px; height: 62px;
  margin: 0 auto 10px;
  background: var(--violet-tint);
  border: 1.5px solid var(--violet);
  display: flex; align-items: center; justify-content: center;
  color: var(--violet);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.15rem;
}
.on-violet .feature-diagram .node .box { background: rgba(217,185,106,0.1); border-color: var(--brass-light); color: var(--brass-light); }
.feature-diagram .arrow { color: var(--line-strong); font-size: 1.2rem; }
.on-violet .feature-diagram .arrow { color: rgba(255,255,255,0.3); }
.feature-diagram .diagram-note { margin-top: 22px; font-size: 0.85rem; color: var(--ink-soft); }
.on-violet .feature-diagram .diagram-note { color: rgba(255,255,255,0.6); }

.check-list { list-style: none; padding: 0; margin: 24px 0 0; }
.check-list li {
  padding-left: 26px;
  position: relative;
  margin-bottom: 15px;
  color: var(--ink-soft);
  font-size: 0.97rem;
}
.on-violet .check-list li { color: rgba(255,255,255,0.75); }
.check-list li::before {
  content: "";
  position: absolute; left: 0; top: 8px;
  width: 9px; height: 1.5px;
  background: var(--brass);
}

/* ---------- values / about ---------- */
.value-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 44px;
  margin-top: 24px;
}
.value-list .num {
  font-family: var(--font-display);
  color: var(--violet-deep);
  font-weight: 500;
  font-size: 1.2rem;
  margin-bottom: 12px;
}

/* ---------- CTA banner ---------- */
.cta-banner {
  background: linear-gradient(120deg, var(--violet-black), var(--violet-deep) 60%, var(--violet));
  color: #fff;
  padding: 72px 0;
  text-align: left;
  position: relative;
}
.cta-banner .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}
.cta-banner h2 { color: #fff; margin-bottom: 8px; }
.cta-banner p { color: rgba(255,255,255,0.75); margin: 0; }

/* ---------- forms ---------- */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}
.form-grid .full { grid-column: 1 / -1; }
label {
  display: block;
  font-size: 0.83rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 7px;
}
input, select, textarea {
  width: 100%;
  border: 1.5px solid var(--line-strong);
  background: #fff;
  padding: 13px 15px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--ink);
  border-radius: 1px;
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--brass);
  outline-offset: 1px;
  border-color: var(--brass);
}
textarea { resize: vertical; min-height: 124px; }

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 68px;
}
.contact-info-item {
  border-top: 1px solid var(--line);
  padding: 20px 0;
}
.contact-info-item .label { font-size: 0.76rem; color: var(--brass); margin-bottom: 5px; letter-spacing: 0.02em; }
.contact-info-item .value { font-family: var(--font-display); font-weight: 500; font-size: 1.1rem; }

/* ---------- differentiator strip ---------- */
.compare-strip {
  border: 1px solid var(--line-strong);
  background: var(--paper);
  padding: 8px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.compare-col { padding: 30px 28px; }
.compare-col.old { color: var(--ink-soft); }
.compare-col.new { background: var(--violet-tint); }
.compare-col .compare-label {
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.02em;
  color: var(--brass); margin-bottom: 14px;
}
.compare-col ul { list-style: none; padding: 0; margin: 0; }
.compare-col li {
  padding: 10px 0; border-top: 1px solid var(--line);
  font-size: 0.93rem;
}
.compare-col li:first-of-type { border-top: none; }

/* ---------- footer ---------- */
footer.site-footer {
  background: var(--violet-black);
  color: rgba(255,255,255,0.68);
  padding: 70px 0 30px;
}
footer.site-footer .foot-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
footer.site-footer .brand-text .name { color: #fff; }
footer.site-footer .brand-text .tag { color: var(--brass-light); }
footer.site-footer .brand { margin-bottom: 16px; }
footer.site-footer p { color: rgba(255,255,255,0.52); font-size: 0.92rem; }
footer.site-footer h4 {
  color: #fff; font-size: 0.82rem; letter-spacing: 0.03em; margin-bottom: 18px;
  font-family: var(--font-body); font-weight: 600;
}
footer.site-footer ul { list-style: none; padding: 0; margin: 0; }
footer.site-footer li { margin-bottom: 11px; }
footer.site-footer a { color: rgba(255,255,255,0.68); font-size: 0.92rem; }
footer.site-footer a:hover { color: var(--brass-light); }
.foot-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 26px; font-size: 0.82rem; color: rgba(255,255,255,0.4);
  flex-wrap: wrap; gap: 10px;
}

/* ---------- page hero (non-home pages) ---------- */
.page-hero {
  padding: 68px 0 60px;
  border-bottom: 1px solid var(--line);
  background: var(--paper-dim);
}
.page-hero .kicker {
  color: var(--brass);
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  margin-bottom: 14px;
}
.page-hero p.lead { font-size: 1.1rem; max-width: 58ch; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .menu-toggle { display: block; }
  nav.main-nav {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 32px 20px;
  }
  nav.main-nav.open { display: flex; }
  nav.main-nav a { width: 100%; padding: 12px 0; border-bottom: 1px solid var(--line); }
  .site-header .wrap { position: relative; flex-wrap: wrap; }
  .nav-cta .btn-primary { padding: 10px 16px; font-size: 0.85rem; }
  .hero .wrap { grid-template-columns: 1fr; }
  .hero-art { order: -1; aspect-ratio: 16/10; clip-path: none; }
  .panel-grid, .audience-grid, .value-list, .form-grid, .compare-strip { grid-template-columns: 1fr; }
  .spec-row { grid-template-columns: 1fr; gap: 18px; }
  .split, .contact-layout { grid-template-columns: 1fr; }
  .split.reverse { direction: ltr; }
  footer.site-footer .foot-top { grid-template-columns: 1fr 1fr; }
}