/* ============================================================
   SolutionMall Unified Design System — shared.css
   Applies to: index.html + all solutions/*.html
   ============================================================ */

:root {
  --bg: #f7fafc;
  --surface: rgba(255,255,255,0.92);
  --surface-solid: #ffffff;
  --text: #0f172a;
  --text-soft: #475569;
  --line: rgba(148,163,184,0.24);
  --brand: #1a56db;
  --brand-2: #0ea5e9;
  --brand-dark: #1040a8;
  --shadow: 0 18px 40px rgba(15,23,42,0.08);
  --shadow-sm: 0 4px 16px rgba(15,23,42,0.06);
  --radius-xl: 24px;
  --radius-lg: 18px;
  --radius-md: 12px;
  --container: 1320px;
  --header-height: 90px;
  --transition: 220ms ease;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); line-height: 1.65; }
img { display: block; width: 100%; max-width: 100%; object-fit: cover; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.container { width: min(var(--container), calc(100% - 32px)); margin: 0 auto; }

/* ============================================================
   HEADER
   ============================================================ */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 500;
  padding-top: 14px;
  transition: padding var(--transition);
}
.header-bar {
  display: grid;
  grid-template-columns: 220px minmax(0,1fr) auto;
  align-items: center;
  gap: 16px;
  border-radius: 999px;
  padding: 12px 18px;
  background: rgba(255,255,255,0.14);
  border: 1px solid rgba(255,255,255,0.18);
  color: rgba(255,255,255,0.96);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition), color var(--transition);
}
.site-header[data-tone="solid"] .header-bar {
  background: rgba(255,255,255,0.97);
  border-color: #dbe7f4;
  color: var(--text);
  box-shadow: 0 8px 28px rgba(15,23,42,0.10);
}

/* Brand / Logo */
.brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  width: 220px;
  min-width: 220px;
  max-width: 220px;
  flex-shrink: 0;
}
.brand-logo {
  width: 220px;
  height: auto;
  object-fit: contain;
  display: block;
}
.brand-url {
  font-size: 11px;
  font-weight: 600;
  color: rgba(255,255,255,0.75);
  letter-spacing: 0.03em;
  transition: color var(--transition);
  white-space: nowrap;
}
.site-header[data-tone="solid"] .brand-url { color: var(--brand); }

/* Nav */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  min-width: 0;
  flex-wrap: nowrap;
  white-space: nowrap;
  overflow: hidden;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 7px 11px;
  border-radius: 999px;
  font-size: 13.5px;
  font-weight: 700;
  white-space: nowrap;
  line-height: 1;
  transition: background var(--transition), color var(--transition);
}
.nav-link:hover,
.nav-link[aria-current="page"] {
  background: rgba(26,86,219,0.12);
  color: var(--brand);
}
.site-header[data-tone="solid"] .nav-link:hover,
.site-header[data-tone="solid"] .nav-link[aria-current="page"] {
  background: rgba(26,86,219,0.10);
  color: var(--brand-dark);
}

/* Header Tools */
.header-tools {
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
  flex-shrink: 0;
}

/* Partner CRM button */
.btn-crm {
  display: inline-flex;
  align-items: center;
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  border: 1px solid rgba(255,255,255,0.30);
  background: rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.92);
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
  text-decoration: none;
}
.btn-crm:hover { background: rgba(255,255,255,0.22); }
.site-header[data-tone="solid"] .btn-crm {
  background: #f0f5ff;
  border-color: #c7d9f8;
  color: var(--brand-dark);
}
.site-header[data-tone="solid"] .btn-crm:hover { background: #dce8ff; }

/* Language Switcher */
.lang-wrap { position: relative; }
.lang-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.26);
  background: rgba(255,255,255,0.12);
  color: inherit;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.lang-button:hover { background: rgba(255,255,255,0.22); }
.site-header[data-tone="solid"] .lang-button {
  background: #fff;
  border-color: rgba(255,255,255,0.3);
  color: rgba(255,255,255,0.88);
}
.site-header[data-tone="solid"] .lang-button:hover { background: rgba(255,255,255,0.12); }
.lang-menu {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  min-width: 180px;
  padding: 8px;
  border-radius: var(--radius-lg);
  background: #fff;
  border: 1px solid #dbe7f4;
  box-shadow: 0 20px 48px rgba(15,23,42,0.16);
  display: none;
  z-index: 99999;
}
.lang-wrap[data-open="true"] .lang-menu { display: block; }
.lang-option {
  display: block;
  width: 100%;
  border: 0;
  border-radius: 10px;
  padding: 9px 12px;
  background: transparent;
  text-align: left;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  transition: background var(--transition);
}
.lang-option:hover { background: #eff6ff; }
.lang-option[data-active="true"] { background: #dbeafe; color: var(--brand-dark); }

/* Primary CTA button */
.btn-primary {
  display: inline-flex;
  align-items: center;
  padding: 11px 20px;
  border-radius: 999px;
  border: 0;
  font-size: 13.5px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 8px 24px rgba(26,86,219,0.30);
  transition: opacity var(--transition), box-shadow var(--transition), transform var(--transition);
  text-decoration: none;
}
.btn-primary:hover { opacity: 0.92; transform: translateY(-1px); box-shadow: 0 12px 32px rgba(26,86,219,0.36); }

/* Secondary button */
.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 11px 20px;
  border-radius: 999px;
  border: 2px solid rgba(255,255,255,0.60);
  background: rgba(255,255,255,0.12);
  color: #fff;
  font-size: 13.5px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition), border-color var(--transition);
  text-decoration: none;
}
.btn-secondary:hover { background: rgba(255,255,255,0.22); border-color: rgba(255,255,255,0.80); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  padding: calc(var(--header-height) + 60px) 0 56px;
  color: #fff;
  background:
    linear-gradient(180deg, rgba(5,20,55,0.42) 0%, rgba(5,20,55,0.72) 100%),
    url('../images/hero-banner.webp') center/cover no-repeat;
  position: relative;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0,1.1fr) minmax(340px,0.9fr);
  gap: 28px;
  align-items: stretch;
}
.hero-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 40px;
  min-height: 340px;
  background: rgba(255,255,255,0.10);
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.hero-visual {
  overflow: hidden;
  border-radius: var(--radius-xl);
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.16);
  box-shadow: var(--shadow);
  min-height: 340px;
}
.hero-visual img { height: 100%; aspect-ratio: 4/3; }
.hero-eyebrow {
  display: inline-flex;
  align-self: flex-start;
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(255,255,255,0.16);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(2rem, 3.8vw, 3.4rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
}
.hero p.hero-summary {
  margin: 0 0 28px;
  max-width: 58ch;
  font-size: 1.05rem;
  opacity: 0.90;
}
.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ============================================================
   MAIN CONTENT
   ============================================================ */
.page-main { padding: 32px 0 80px; }
.page-grid {
  display: grid;
  grid-template-columns: minmax(0,1fr) 300px;
  gap: 24px;
  align-items: start;
}
.content-stack { display: grid; gap: 20px; }
.content-section {
  background: var(--surface);
  border: 1px solid rgba(226,232,240,0.88);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  padding: 28px;
}
.section-grid {
  display: grid;
  grid-template-columns: minmax(0,1.05fr) minmax(300px,0.95fr);
  gap: 24px;
  align-items: stretch;
}
.section-copy h2 {
  margin: 0 0 12px;
  font-size: 26px;
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.01em;
}
.section-copy p { color: var(--text-soft); margin: 0 0 16px; }
.section-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #eaf2fb;
  min-height: 260px;
}
.section-visual img { height: 100%; aspect-ratio: 4/3; }
.card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 14px;
  margin-top: 16px;
}
.info-card {
  padding: 18px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.82);
  border: 1px solid rgba(226,232,240,0.92);
  box-shadow: 0 4px 14px rgba(15,23,42,0.05);
  transition: box-shadow var(--transition), transform var(--transition);
}
.info-card:hover { box-shadow: 0 8px 24px rgba(15,23,42,0.10); transform: translateY(-2px); }
.info-card h3 { margin: 0 0 8px; font-size: 17px; font-weight: 800; line-height: 1.2; }
.info-card p { margin: 0; font-size: 14px; color: var(--text-soft); }

/* Section label */
.section-label {
  display: inline-flex;
  padding: 5px 12px;
  border-radius: 999px;
  background: rgba(26,86,219,0.10);
  color: var(--brand-dark);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar {
  position: sticky;
  top: calc(var(--header-height) + 16px);
  display: grid;
  gap: 16px;
}
.sidebar-card {
  background: var(--surface);
  border: 1px solid rgba(226,232,240,0.88);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  padding: 20px;
}
.sidebar-card h3 { margin: 0 0 12px; font-size: 16px; font-weight: 800; }
.toc-links { display: grid; gap: 6px; }
.toc-link {
  display: block;
  padding: 9px 12px;
  border-radius: 10px;
  color: var(--text);
  font-size: 13.5px;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: background var(--transition), color var(--transition);
}
.toc-link:hover,
.toc-link.is-active {
  background: #dbeafe;
  color: var(--brand-dark);
}
.sidebar-cta-body { font-size: 13.5px; color: var(--text-soft); margin: 0 0 14px; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  border-top: 1px solid #e2e8f0;
  background: rgba(255,255,255,0.88);
  padding: 24px 0;
}
.footer-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  width: 220px;
  flex-shrink: 0;
}
.footer-brand-logo {
  width: 220px;
  height: auto;
  object-fit: contain;
  display: block;
}
.footer-brand-url {
  font-size: 11px;
  font-weight: 600;
  color: var(--brand);
  letter-spacing: 0.03em;
}
.footer-socials {
  display: flex;
  gap: 10px;
  flex-wrap: nowrap;
  align-items: center;
}
.footer-socials a {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  background: #eff6ff;
  color: var(--brand-dark);
  transition: background var(--transition), color var(--transition), transform var(--transition);
}
.footer-socials a:hover { background: var(--brand); color: #fff; transform: translateY(-2px); }
.footer-socials svg { width: 16px; height: 16px; fill: currentColor; }
.footer-copy {
  font-size: 12px;
  color: var(--text-soft);
  text-align: center;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid #e2e8f0;
}

/* ============================================================
   BREADCRUMB
   ============================================================ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,0.75);
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.breadcrumb a { color: rgba(255,255,255,0.75); transition: color var(--transition); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb-sep { opacity: 0.5; }

/* ============================================================
   SOLUTION CARDS (homepage)
   ============================================================ */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 20px;
}
.solution-card {
  background: var(--surface-solid);
  border: 1px solid rgba(226,232,240,0.88);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}
.solution-card:hover { box-shadow: 0 20px 48px rgba(15,23,42,0.14); transform: translateY(-4px); }
.solution-card-header {
  height: 140px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}
.solution-card-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.solution-card-tag {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 10px;
  background: rgba(26,86,219,0.10);
  color: var(--brand-dark);
}
.solution-card h3 { margin: 0 0 8px; font-size: 17px; font-weight: 800; line-height: 1.25; }
.solution-card p { margin: 0 0 14px; font-size: 13.5px; color: var(--text-soft); flex: 1; }
.solution-card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--brand);
  transition: gap var(--transition);
}
.solution-card-link:hover { gap: 10px; }

/* ============================================================
   SECTION HEADINGS
   ============================================================ */
.section-heading {
  text-align: center;
  margin-bottom: 40px;
}
.section-heading h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
}
.section-heading p {
  max-width: 60ch;
  margin: 0 auto;
  color: var(--text-soft);
  font-size: 1.05rem;
}

/* ============================================================
   STATS BAR
   ============================================================ */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 16px;
  margin-top: 28px;
}
.stat-item {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.18);
  text-align: center;
}
.stat-value {
  font-size: 1.8rem;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 4px;
}
.stat-label { font-size: 12px; opacity: 0.80; }

/* ============================================================
   ARCHITECTURE DIAGRAM
   ============================================================ */
.arch-container {
  background: #f8faff;
  border: 1px solid #dbeafe;
  border-radius: var(--radius-lg);
  padding: 24px;
  overflow-x: auto;
}
.arch-container svg { width: 100%; height: auto; min-width: 600px; }

/* ============================================================
   PRODUCT GRID
   ============================================================ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 16px;
  margin-top: 16px;
}
.product-card {
  padding: 18px;
  border-radius: var(--radius-md);
  background: #f8faff;
  border: 1px solid #dbeafe;
  transition: box-shadow var(--transition), transform var(--transition);
}
.product-card:hover { box-shadow: var(--shadow-sm); transform: translateY(-2px); }
.product-card h4 { margin: 0 0 8px; font-size: 15px; font-weight: 800; color: var(--brand-dark); }
.product-card p { margin: 0; font-size: 13px; color: var(--text-soft); }
.product-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.product-tag {
  padding: 3px 8px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
  background: rgba(26,86,219,0.08);
  color: var(--brand-dark);
}

/* ============================================================
   CTA BAND
   ============================================================ */
.cta-band {
  background: linear-gradient(135deg, var(--brand-dark) 0%, var(--brand) 50%, var(--brand-2) 100%);
  border-radius: var(--radius-xl);
  padding: 48px 40px;
  text-align: center;
  color: #fff;
}
.cta-band h2 { margin: 0 0 12px; font-size: clamp(1.6rem,2.8vw,2.2rem); font-weight: 900; }
.cta-band p { margin: 0 0 28px; opacity: 0.88; font-size: 1.05rem; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn-white {
  display: inline-flex;
  align-items: center;
  padding: 13px 26px;
  border-radius: 999px;
  border: 0;
  font-size: 14px;
  font-weight: 800;
  background: #fff;
  color: var(--brand-dark);
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 8px 24px rgba(0,0,0,0.18);
  transition: opacity var(--transition), transform var(--transition);
  text-decoration: none;
}
.btn-white:hover { opacity: 0.92; transform: translateY(-1px); }
.btn-outline-white {
  display: inline-flex;
  align-items: center;
  padding: 12px 24px;
  border-radius: 999px;
  border: 2px solid rgba(255,255,255,0.60);
  background: rgba(255,255,255,0.12);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition), border-color var(--transition);
  text-decoration: none;
}
.btn-outline-white:hover { background: rgba(255,255,255,0.22); border-color: rgba(255,255,255,0.80); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1180px) {
  .hero-grid,
  .section-grid,
  .page-grid { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .solutions-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .products-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .stats-bar { grid-template-columns: repeat(2, minmax(0,1fr)); }
}
@media (max-width: 1024px) {
  :root { --header-height: 100px; }
  .header-bar {
    grid-template-columns: 220px minmax(0,1fr);
    row-gap: 10px;
    border-radius: 22px;
  }
  .header-tools {
    grid-column: 1 / -1;
    justify-content: flex-end;
  }
  .nav-links { overflow-x: auto; }
  .nav-links::-webkit-scrollbar { display: none; }
}
@media (max-width: 768px) {
  .container { width: min(var(--container), calc(100% - 20px)); }
  .hero-copy,
  .content-section,
  .sidebar-card { padding: 20px; }
  .card-grid { grid-template-columns: 1fr; }
  .solutions-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .stats-bar { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .header-bar { grid-template-columns: 1fr; border-radius: 18px; }
  .cta-band { padding: 32px 20px; }
  .hero-copy { padding: 28px; }
  .hero-actions { flex-direction: column; }
}

/* ============================================================
   BACK TO TOP
   ============================================================ */
#backTop {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
  border: 0;
  font-size: 18px;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(26,86,219,0.36);
  z-index: 400;
  transition: opacity var(--transition), transform var(--transition);
}
#backTop.visible { display: flex; }
#backTop:hover { transform: translateY(-2px); }

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.fade-up { animation: fadeUp 0.5s ease both; }
.fade-up-d1 { animation-delay: 0.1s; }
.fade-up-d2 { animation-delay: 0.2s; }
.fade-up-d3 { animation-delay: 0.3s; }

/* ============================================================
   UNIFIED HEADER ALIASES — for solution pages
   (solution pages use .header-inner / .logo-block / .main-nav
    instead of .header-bar / .brand / .nav-links)
   ============================================================ */
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 20px;
}
.logo-block { flex-shrink: 0; }
.logo-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  text-decoration: none;
}
.logo-img {
  height: 40px;
  width: auto;
  object-fit: contain;
  filter: none;
  transition: filter var(--transition);
}
.site-header[data-tone="solid"] .logo-img { filter: none; }
.logo-url {
  font-size: 10px;
  color: rgba(255,255,255,0.65);
  letter-spacing: 0.5px;
  line-height: 1;
  text-align: center;
  transition: color var(--transition);
}
.site-header[data-tone="solid"] .logo-url { color: rgba(255,255,255,0.65); }
.logo-link:hover .logo-url { color: #60a5fa; }
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
/* site-header solid tone for solution pages */
.site-header {
  background: rgba(15,28,46,0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.08);
  height: 72px;
}
.site-header[data-tone="solid"] {
  background: rgba(255,255,255,0.97);
  border-bottom-color: #dbe7f4;
  box-shadow: 0 8px 28px rgba(15,23,42,0.10);
}
.site-header[data-tone="solid"] .nav-link { color: rgba(255,255,255,0.88); }
.site-header[data-tone="solid"] .nav-link:hover { color: var(--brand); background: rgba(26,86,219,0.08); }
/* Default nav-link color (transparent header) */
.nav-link { color: rgba(255,255,255,0.88); }

/* ============================================================
   UNIFIED FOOTER ALIASES — for solution pages
   ============================================================ */
.footer-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
.footer-links-col { }
.footer-url {
  font-size: 12px;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.3px;
}
.footer-logo {
  height: 32px;
  width: auto;
  filter: brightness(0) invert(1);
}
.footer-logo-link {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  margin-bottom: 16px;
  text-decoration: none;
}
.footer-brand p {
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  line-height: 1.7;
  margin: 0 0 16px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.footer-links h5 {
  font-size: 13px;
  font-weight: 700;
  color: rgba(255,255,255,0.5);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
  margin-top: 0;
}
.footer-links a {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  padding: 4px 0;
  transition: color var(--transition);
  text-decoration: none;
}
.footer-links a:hover { color: #60a5fa; }
.footer-cta-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-cta-col h5 {
  font-size: 13px;
  font-weight: 700;
  color: rgba(255,255,255,0.5);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin: 0 0 4px;
}
.footer-cta-btn {
  display: block;
  padding: 12px 20px;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  text-align: center;
  transition: all var(--transition);
  text-decoration: none;
}
.footer-cta-btn:hover { background: var(--brand-dark); }
.footer-survey-btn {
  background: transparent;
  border: 2px solid rgba(255,255,255,0.3);
}
.footer-survey-btn:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.6);
}
.footer-note {
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  line-height: 1.5;
  margin: 0;
}
.footer-bottom {
  padding: 20px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  gap: 16px;
  align-items: center;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}

/* Social icons */
.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.10);
  color: rgba(255,255,255,0.75);
  transition: background var(--transition), color var(--transition), transform var(--transition);
  text-decoration: none;
}
.social-icon:hover {
  background: var(--brand);
  color: #fff;
  transform: translateY(-2px);
}
.social-icon svg { width: 16px; height: 16px; fill: currentColor; }

/* ============================================================
   MOBILE MENU BUTTON
   ============================================================ */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.mobile-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: rgba(255,255,255,0.88);
  border-radius: 2px;
  transition: all var(--transition);
}
.site-header[data-tone="solid"] .mobile-menu-btn span { background: var(--text); }

/* ============================================================
   SOLUTION PAGE — body padding for fixed header
   ============================================================ */
body.solution-page { padding-top: 72px; }

/* ============================================================
   RESPONSIVE — solution pages
   ============================================================ */
@media (max-width: 900px) {
  .main-nav { display: none; }
  .mobile-menu-btn { display: flex; }
  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 72px 0 0 0;
    background: rgba(15,28,46,0.98);
    padding: 24px;
    z-index: 499;
    gap: 4px;
    overflow-y: auto;
  }
  .main-nav.open .nav-link {
    padding: 12px 16px;
    font-size: 15px;
    border-radius: 10px;
    color: rgba(255,255,255,0.88);
  }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .footer-grid { grid-template-columns: 1fr; }
  .header-inner { padding: 0 16px; gap: 12px; }
  .btn-sm { display: none; }
}