/* ============================================================
   ITSOL theme — design system layered over Bootstrap 5.3
   Palette: ink #0F0F0F · accent #6366F1 · warning #F59E0B
            success #10B981 · surface #F9F8F6 · muted #64748B
   ============================================================ */

:root {
  --itsol-ink: #0f0f0f;
  --itsol-accent: #6366f1;
  --itsol-warning: #f59e0b;
  --itsol-success: #10b981;
  --itsol-surface: #f9f8f6;
  --itsol-muted: #64748b;
  --itsol-border: #e5e3df;

  /* Bootstrap overrides */
  --bs-primary: #6366f1;
  --bs-primary-rgb: 99, 102, 241;
  --bs-body-color: #1a1a1a;
  --bs-body-font-family: "Inter", system-ui, -apple-system, sans-serif;
  --bs-body-font-size: 1rem;
  --bs-body-line-height: 1.6;
  --bs-border-radius: 0.625rem;
  --bs-border-radius-lg: 1rem;
}

body {
  background: #fff;
  color: #1a1a1a;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: rgba(99, 102, 241, 0.2);
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, .itsol-h1, .itsol-h2 {
  font-family: "Inter", system-ui, sans-serif;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.font-mono, code, .itsol-mono {
  font-family: "JetBrains Mono", ui-monospace, monospace;
}
.itsol-h1 {
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
}
.itsol-h2 {
  font-size: clamp(1.875rem, 3.5vw, 2.5rem);
}
.text-accent { color: var(--itsol-accent) !important; }
.text-success { color: var(--itsol-success) !important; }
.text-warning { color: var(--itsol-warning) !important; }
.text-muted-2 { color: var(--itsol-muted) !important; }

/* ---------- Buttons ---------- */
.btn-warning {
  --bs-btn-bg: var(--itsol-warning);
  --bs-btn-border-color: var(--itsol-warning);
  --bs-btn-hover-bg: #e08c08;
  --bs-btn-hover-border-color: #e08c08;
  --bs-btn-color: var(--itsol-ink);
  --bs-btn-hover-color: var(--itsol-ink);
  font-weight: 600;
}
.btn-primary {
  --bs-btn-bg: var(--itsol-accent);
  --bs-btn-border-color: var(--itsol-accent);
  --bs-btn-hover-bg: #4f51d8;
  --bs-btn-hover-border-color: #4f51d8;
}
.btn-dark {
  --bs-btn-bg: var(--itsol-ink);
  --bs-btn-border-color: var(--itsol-ink);
}

/* ---------- Layout helpers ---------- */
.itsol-section { padding: clamp(3.5rem, 8vw, 7rem) 0; }
.bg-ink { background: var(--itsol-ink) !important; color: #fff; }
.bg-surface { background: var(--itsol-surface) !important; }

/* ---------- Navbar ---------- */
.itsol-nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1030;
  transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  border-bottom: 1px solid transparent;
}
.itsol-nav .navbar { padding-block: 0.75rem; }
.itsol-nav .nav-link { color: rgba(255, 255, 255, 0.85); font-weight: 500; font-size: 0.95rem; }
.itsol-nav .nav-link:hover, .itsol-nav .nav-link.active { color: #fff; }
.itsol-nav .navbar-brand, .itsol-nav .navbar-toggler { color: #fff; }
.itsol-nav.is-scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  border-bottom-color: var(--itsol-border);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.02);
}
.itsol-nav.is-scrolled .nav-link { color: rgba(15, 15, 15, 0.8); }
.itsol-nav.is-scrolled .nav-link:hover, .itsol-nav.is-scrolled .nav-link.active { color: var(--itsol-accent); }
.itsol-nav.is-scrolled .navbar-brand, .itsol-nav.is-scrolled .navbar-toggler { color: var(--itsol-ink); }
/* On non-home interior pages the navbar starts solid (no dark hero behind). */
body:not(.itsol-home) .itsol-nav { background: var(--itsol-ink); }
.itsol-logo-mark {
  display: grid; place-items: center;
  width: 2rem; height: 2rem; border-radius: 0.375rem;
  background: #fff; color: var(--itsol-ink);
  font-family: "JetBrains Mono", monospace; font-weight: 700; font-size: 0.8rem;
}
.itsol-nav:not(.is-scrolled) .itsol-logo-mark { background: #fff; color: var(--itsol-ink); }
.itsol-nav.is-scrolled .itsol-logo-mark { background: var(--itsol-ink); color: #fff; }
.itsol-logo-mark--invert { background: #fff; color: var(--itsol-ink); }
main { display: block; }

/* ---------- Hero ---------- */
.itsol-hero {
  position: relative;
  overflow: hidden;
  background: var(--itsol-ink);
  color: #fff;
  padding-top: clamp(7rem, 14vw, 10rem);
}
.itsol-hero__grid {
  position: absolute; inset: 0; opacity: 0.07; pointer-events: none;
  background-image:
    linear-gradient(to right, #fff 1px, transparent 1px),
    linear-gradient(to bottom, #fff 1px, transparent 1px);
  background-size: 56px 56px;
}
.itsol-hero__glow {
  position: absolute; top: -10rem; left: 50%; transform: translateX(-50%);
  width: 480px; height: 480px; border-radius: 50%;
  background: rgba(99, 102, 241, 0.25); filter: blur(140px); pointer-events: none;
}
.itsol-pill {
  display: inline-flex; align-items: center; gap: 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.05);
  padding: 0.375rem 1rem; border-radius: 999px;
  font-size: 0.875rem; font-weight: 500; color: rgba(255, 255, 255, 0.8);
}
.itsol-pill .dot { width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--itsol-success); }

/* ---------- Trust bar ---------- */
.itsol-trust-bar {
  border-block: 1px solid var(--itsol-border);
  background: var(--itsol-surface);
  color: var(--itsol-muted);
  font-size: 0.875rem; font-weight: 500;
  padding: 1rem 0;
}
.itsol-trust-sep { color: var(--itsol-border); }

/* ---------- Cards ---------- */
.itsol-card {
  height: 100%;
  border: 1px solid var(--itsol-border);
  border-radius: 1rem;
  background: #fff;
  padding: 1.75rem;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.itsol-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(15, 15, 15, 0.08);
  border-color: rgba(99, 102, 241, 0.3);
}
.itsol-card--dark { background: var(--itsol-ink); color: #fff; border-color: rgba(99, 102, 241, 0.3); }
.itsol-card--dark .itsol-card-summary { color: rgba(255, 255, 255, 0.7); }
.itsol-eyebrow { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--itsol-muted); }
.itsol-result {
  border-radius: 0.75rem; background: var(--itsol-surface); padding: 1rem; margin-top: 1.5rem;
}
.itsol-result .label { font-size: 0.85rem; font-weight: 600; color: var(--itsol-success); }
.itsol-result .value { font-weight: 700; line-height: 1.3; margin-top: 0.25rem; }

/* ---------- Numbers / counters ---------- */
.itsol-numbers { padding: clamp(3rem, 6vw, 5rem) 0; }
.itsol-numbers--dark { background: var(--itsol-ink); color: #fff; }
.itsol-stat-value { font-weight: 800; font-size: clamp(2.25rem, 4vw, 3rem); letter-spacing: -0.02em; color: var(--itsol-accent); }
.itsol-numbers:not(.itsol-numbers--dark) .itsol-stat-label { color: var(--itsol-muted); }
.itsol-stat-label { font-size: 0.875rem; color: rgba(255, 255, 255, 0.6); margin-top: 0.25rem; }

/* ---------- Story / quote ---------- */
.itsol-quote {
  border-left: 4px solid var(--itsol-accent);
  padding-left: 1.5rem;
  font-weight: 800; letter-spacing: -0.02em; line-height: 1.15;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
}

/* ---------- FAQ ---------- */
.itsol-faq .accordion-button {
  font-family: "Inter", sans-serif; font-weight: 600; font-size: 1.125rem; color: var(--itsol-ink);
  padding-block: 1.25rem;
}
.itsol-faq .accordion-button:not(.collapsed) { background: transparent; color: var(--itsol-accent); box-shadow: none; }
.itsol-faq .accordion-button:focus { box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.25); }
.itsol-faq .accordion-body { color: var(--itsol-muted); font-size: 1.0625rem; line-height: 1.7; }

/* ---------- CTA band ---------- */
.itsol-cta { background: var(--itsol-ink); }

/* ---------- Breadcrumbs ---------- */
.itsol-breadcrumbs a { color: rgba(255, 255, 255, 0.6); text-decoration: none; }
.itsol-breadcrumbs a:hover { color: #fff; }
.itsol-breadcrumbs [aria-current="page"] { color: #fff; font-weight: 500; }
.itsol-crumb-sep { color: rgba(255, 255, 255, 0.4); margin-inline: 0.25rem; }
/* On light interior headers, breadcrumbs invert (set via .itsol-crumbs-dark wrapper). */

/* ---------- Article / prose ---------- */
.itsol-prose { max-width: 68ch; font-size: 1.0625rem; line-height: 1.75; color: rgba(15, 15, 15, 0.9); }
.itsol-prose h2 { margin-top: 3rem; margin-bottom: 1rem; font-size: 1.875rem; }
.itsol-prose h3 { margin-top: 2rem; margin-bottom: 0.75rem; font-size: 1.25rem; font-weight: 700; }
.itsol-prose p { margin-block: 1.25rem; }
.itsol-prose ul, .itsol-prose ol { margin-block: 1.25rem; padding-left: 1.5rem; }
.itsol-prose li { margin-block: 0.5rem; }
.itsol-prose a { color: var(--itsol-accent); text-decoration: underline; text-underline-offset: 3px; }
.itsol-prose blockquote { border-left: 4px solid var(--itsol-accent); padding-left: 1.25rem; font-style: italic; color: var(--itsol-muted); margin-block: 1.5rem; }
.itsol-callout {
  margin-block: 2rem; border: 1px solid rgba(99, 102, 241, 0.2);
  background: rgba(99, 102, 241, 0.05); border-radius: 1rem; padding: 1.5rem;
}
.itsol-callout .label { font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--itsol-accent); }
.itsol-about-box {
  margin-block: 2.5rem; border: 1px solid var(--itsol-border);
  background: var(--itsol-surface); border-radius: 1rem; padding: 1.5rem;
  font-size: 0.95rem; line-height: 1.7; color: var(--itsol-muted);
}

/* ---------- Footer ---------- */
.itsol-footer { background: var(--itsol-ink); color: #fff; }
.itsol-footer-heading { font-size: 0.8rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: rgba(255, 255, 255, 0.4); margin-bottom: 1rem; }
.itsol-footer-links { display: grid; gap: 0.75rem; }
.itsol-footer-links a { color: rgba(255, 255, 255, 0.7); text-decoration: none; font-size: 0.95rem; }
.itsol-footer-links a:hover { color: #fff; }
.itsol-newsletter .form-control { background: rgba(255, 255, 255, 0.05); border-color: rgba(255, 255, 255, 0.15); color: #fff; }
.itsol-newsletter .form-control::placeholder { color: rgba(255, 255, 255, 0.4); }

/* ---------- Forms ---------- */
.itsol-form .form-label { font-weight: 500; font-size: 0.9rem; }
.itsol-form .form-control, .itsol-form .form-select { padding: 0.7rem 1rem; border-color: rgba(15, 15, 15, 0.15); }
.itsol-form .form-control:focus, .itsol-form .form-select:focus { border-color: var(--itsol-accent); box-shadow: 0 0 0 0.2rem rgba(99, 102, 241, 0.2); }
.itsol-field-error { color: var(--itsol-warning); font-size: 0.875rem; margin-top: 0.35rem; }

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; will-change: opacity, transform; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

html { scroll-behavior: smooth; }
[id] { scroll-margin-top: 5rem; }