/* =========================================================================
   ErpInvoiceFlow — Design System
   A premium, enterprise-grade theme layered on top of Bootstrap 5.
   Palette + typography tuned for finance leaders (CEO / CFO / IT Manager).
   ========================================================================= */

:root {
  /* Brand palette */
  --eif-ink: #0b1f3a;            /* deep navy — primary brand */
  --eif-ink-800: #12294b;
  --eif-ink-700: #1b365d;
  --eif-accent: #2563eb;         /* confident blue accent */
  --eif-accent-600: #1d4ed8;
  --eif-accent-700: #1e40af;
  --eif-teal: #0ea5a5;           /* secondary accent for highlights */
  --eif-gold: #c9a227;           /* premium detail accent */

  /* Neutrals */
  --eif-bg: #ffffff;
  --eif-bg-soft: #f6f8fb;        /* warm-cool section background */
  --eif-bg-navy: #0b1f3a;
  --eif-surface: #ffffff;
  --eif-border: #e4e9f0;
  --eif-text: #17233a;
  --eif-text-muted: #5b6b83;
  --eif-text-invert: #eaf1fb;
  --eif-text-invert-muted: #a9bad5;

  /* Feedback */
  --eif-success: #15803d;
  --eif-danger: #b42318;

  /* Typography */
  --eif-font-sans: "Manrope", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --eif-font-display: "Manrope", "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* Elevation & shape */
  --eif-radius-sm: 8px;
  --eif-radius: 14px;
  --eif-radius-lg: 22px;
  --eif-shadow-sm: 0 1px 2px rgba(11, 31, 58, .06), 0 1px 3px rgba(11, 31, 58, .08);
  --eif-shadow: 0 10px 30px -12px rgba(11, 31, 58, .18);
  --eif-shadow-lg: 0 30px 60px -20px rgba(11, 31, 58, .30);

  /* Spacing rhythm */
  --eif-section-y: clamp(3.5rem, 7vw, 7rem);

  /* Bootstrap override hooks */
  --bs-primary: var(--eif-accent);
  --bs-link-color: var(--eif-accent-600);
  --bs-body-color: var(--eif-text);
  --bs-body-font-family: var(--eif-font-sans);
}

/* ---------- Base ---------- */
body {
  font-family: var(--eif-font-sans);
  color: var(--eif-text);
  background: var(--eif-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, .display-1, .display-2, .display-3, .display-4 {
  font-family: var(--eif-font-display);
  color: var(--eif-ink);
  letter-spacing: -0.02em;
  font-weight: 800;
  line-height: 1.1;
}

a {
  color: var(--eif-accent-600);
  text-decoration: none;
  transition: color .15s ease;
}
a:hover { color: var(--eif-accent-700); }

.eif-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--eif-accent-600);
}
.eif-eyebrow--invert { color: var(--eif-teal); }

.eif-lead {
  font-size: clamp(1.05rem, 1.6vw, 1.28rem);
  color: var(--eif-text-muted);
  line-height: 1.6;
}

.text-gradient {
  background: linear-gradient(100deg, var(--eif-accent) 0%, var(--eif-teal) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
  --bs-btn-font-weight: 700;
  border-radius: 999px;
  padding: .72rem 1.5rem;
  font-weight: 700;
  letter-spacing: .01em;
  transition: transform .12s ease, box-shadow .2s ease, background-color .2s ease;
}
.btn-lg { padding: .9rem 1.9rem; font-size: 1.02rem; }

.btn-primary,
.eif-btn-primary {
  --bs-btn-bg: var(--eif-accent);
  --bs-btn-border-color: var(--eif-accent);
  --bs-btn-hover-bg: var(--eif-accent-600);
  --bs-btn-hover-border-color: var(--eif-accent-600);
  --bs-btn-active-bg: var(--eif-accent-700);
  color: #fff;
  background-color: var(--eif-accent);
  border-color: var(--eif-accent);
  box-shadow: 0 10px 24px -12px rgba(37, 99, 235, .8);
}
.btn-primary:hover,
.eif-btn-primary:hover {
  color: #fff;
  background-color: var(--eif-accent-600);
  border-color: var(--eif-accent-600);
  transform: translateY(-1px);
}

.eif-btn-ghost {
  color: var(--eif-ink);
  background: transparent;
  border: 1.5px solid var(--eif-border);
}
.eif-btn-ghost:hover {
  color: var(--eif-ink);
  border-color: var(--eif-ink);
  background: var(--eif-bg-soft);
}

.eif-btn-invert {
  color: var(--eif-ink);
  background: #fff;
  border: none;
}
.eif-btn-invert:hover { color: var(--eif-ink); background: #eaf1fb; transform: translateY(-1px); }

.eif-btn-outline-invert {
  color: #fff;
  background: transparent;
  border: 1.5px solid rgba(255,255,255,.4);
}
.eif-btn-outline-invert:hover { color: var(--eif-ink); background: #fff; }

/* ---------- Navbar (marketing) ---------- */
.eif-navbar {
  background: rgba(255, 255, 255, .82);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--eif-border);
  transition: box-shadow .2s ease;
}
.eif-navbar.is-scrolled { box-shadow: var(--eif-shadow-sm); }
.eif-brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-family: var(--eif-font-display);
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--eif-ink) !important;
  letter-spacing: -.02em;
}
.eif-brand .eif-logo { width: 34px; height: 34px; flex: 0 0 auto; }
.eif-nav-link {
  color: var(--eif-text) !important;
  font-weight: 600;
  font-size: .96rem;
  padding: .4rem .85rem !important;
  border-radius: 8px;
}
.eif-nav-link:hover { color: var(--eif-accent-600) !important; background: var(--eif-bg-soft); }

/* ---------- Layout helpers ---------- */
.eif-section { padding-block: var(--eif-section-y); }
.eif-section--soft { background: var(--eif-bg-soft); }
.eif-section--navy {
  background: radial-gradient(1200px 600px at 80% -10%, #16335c 0%, transparent 60%),
              linear-gradient(180deg, #0b1f3a 0%, #0a1a31 100%);
  color: var(--eif-text-invert);
}
.eif-section--navy h1, .eif-section--navy h2, .eif-section--navy h3 { color: #fff; }
.eif-section--navy .eif-lead { color: var(--eif-text-invert-muted); }
.eif-container { max-width: 1180px; }
.eif-measure { max-width: 46rem; }

/* ---------- Hero ---------- */
.eif-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(900px 500px at 12% -10%, rgba(37,99,235,.10) 0%, transparent 55%),
    radial-gradient(800px 500px at 100% 0%, rgba(14,165,165,.10) 0%, transparent 50%),
    var(--eif-bg);
  padding-top: clamp(3rem, 6vw, 5.5rem);
  padding-bottom: clamp(3rem, 6vw, 5.5rem);
}
.eif-hero h1 { font-size: clamp(2.3rem, 5.2vw, 3.9rem); }
.eif-hero-badges { display: flex; flex-wrap: wrap; gap: .5rem .6rem; }
.eif-pill {
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .38rem .8rem;
  border-radius: 999px;
  background: #fff;
  border: 1px solid var(--eif-border);
  box-shadow: var(--eif-shadow-sm);
  font-size: .85rem; font-weight: 600; color: var(--eif-text-muted);
}
.eif-pill .dot { width: .5rem; height: .5rem; border-radius: 50%; background: var(--eif-success); }

/* Hero visual mock */
.eif-mock {
  border-radius: var(--eif-radius-lg);
  background: #fff;
  border: 1px solid var(--eif-border);
  box-shadow: var(--eif-shadow-lg);
  overflow: hidden;
}
.eif-mock-bar {
  display: flex; align-items: center; gap: .4rem;
  padding: .8rem 1rem;
  background: var(--eif-bg-soft);
  border-bottom: 1px solid var(--eif-border);
}
.eif-mock-bar .d { width: .7rem; height: .7rem; border-radius: 50%; background: #d5deea; }
.eif-mock-body { padding: 1.25rem; }
.eif-mock-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: .7rem .85rem; border-radius: 10px;
  border: 1px solid var(--eif-border); margin-bottom: .55rem; background: #fff;
}
.eif-mock-row small { color: var(--eif-text-muted); }
.eif-chip {
  font-size: .72rem; font-weight: 700; padding: .2rem .55rem;
  border-radius: 999px; background: rgba(21,128,61,.12); color: var(--eif-success);
}
.eif-chip--processing { background: rgba(37,99,235,.12); color: var(--eif-accent-600); }

/* ---------- Logo / compatibility strip ---------- */
.eif-logostrip {
  border-block: 1px solid var(--eif-border);
  background: #fff;
}
.eif-logostrip .label { color: var(--eif-text-muted); font-weight: 600; letter-spacing: .02em; }
.eif-erp {
  font-family: var(--eif-font-display);
  font-weight: 800; font-size: 1.15rem; color: var(--eif-ink);
  opacity: .85;
}

/* ---------- Cards ---------- */
.eif-card {
  height: 100%;
  background: var(--eif-surface);
  border: 1px solid var(--eif-border);
  border-radius: var(--eif-radius);
  padding: 1.6rem;
  box-shadow: var(--eif-shadow-sm);
  transition: transform .18s ease, box-shadow .2s ease, border-color .2s ease;
}
.eif-card:hover { transform: translateY(-3px); box-shadow: var(--eif-shadow); border-color: #d2ddec; }
.eif-card h3 { font-size: 1.18rem; margin-bottom: .5rem; }
.eif-card p { color: var(--eif-text-muted); margin-bottom: 0; }

.eif-icon {
  display: inline-grid; place-items: center;
  width: 48px; height: 48px; border-radius: 12px;
  background: linear-gradient(135deg, rgba(37,99,235,.14), rgba(14,165,165,.14));
  color: var(--eif-accent-600);
  margin-bottom: 1rem;
}
.eif-icon svg { width: 24px; height: 24px; }

/* ---------- Steps ---------- */
.eif-step { position: relative; padding-left: 0; }
.eif-step-num {
  display: inline-grid; place-items: center;
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--eif-ink); color: #fff; font-weight: 800;
  margin-bottom: 1rem;
}
.eif-step h3 { font-size: 1.15rem; }
.eif-step p { color: var(--eif-text-muted); }

/* ---------- Differentiator / comparison ---------- */
.eif-compare {
  border-radius: var(--eif-radius);
  border: 1px solid var(--eif-border);
  overflow: hidden;
  box-shadow: var(--eif-shadow-sm);
  background: #fff;
}
.eif-compare .row-head { background: var(--eif-bg-soft); font-weight: 700; color: var(--eif-ink); }
.eif-compare .cell {
  padding: 1rem 1.2rem; border-bottom: 1px solid var(--eif-border);
  display: flex; align-items: center; gap: .6rem;
}
.eif-yes { color: var(--eif-success); font-weight: 700; }
.eif-no { color: var(--eif-text-muted); }
.eif-yes svg, .eif-no svg { width: 20px; height: 20px; }

/* ---------- Stats ---------- */
.eif-stat { text-align: center; }
.eif-stat .num {
  font-family: var(--eif-font-display);
  font-weight: 800; font-size: clamp(2rem, 4vw, 2.9rem);
  color: #fff; line-height: 1;
}
.eif-stat .lbl { color: var(--eif-text-invert-muted); font-weight: 600; margin-top: .4rem; }

/* ---------- Check list ---------- */
.eif-checks { list-style: none; padding: 0; margin: 0; }
.eif-checks li {
  display: flex; align-items: flex-start; gap: .7rem;
  padding: .5rem 0; color: var(--eif-text); font-weight: 500;
}
.eif-checks li svg { width: 22px; height: 22px; flex: 0 0 auto; color: var(--eif-success); margin-top: .1rem; }
.eif-section--navy .eif-checks li { color: var(--eif-text-invert); }
.eif-section--navy .eif-checks li svg { color: #34d399; }

/* ---------- FAQ ---------- */
.eif-faq .accordion-button {
  font-weight: 700; color: var(--eif-ink); border-radius: var(--eif-radius-sm) !important;
}
.eif-faq .accordion-button:not(.collapsed) { background: var(--eif-bg-soft); color: var(--eif-ink); box-shadow: none; }
.eif-faq .accordion-button:focus { box-shadow: 0 0 0 .2rem rgba(37,99,235,.2); }
.eif-faq .accordion-item { border: 1px solid var(--eif-border); border-radius: var(--eif-radius-sm); margin-bottom: .75rem; overflow: hidden; }

/* ---------- Demo form ---------- */
.eif-form-card {
  background: #fff;
  border-radius: var(--eif-radius-lg);
  box-shadow: var(--eif-shadow-lg);
  border: 1px solid var(--eif-border);
  padding: clamp(1.5rem, 3vw, 2.4rem);
}
.eif-form-card .form-control, .eif-form-card .form-select {
  border-radius: 10px; padding: .7rem .9rem; border-color: var(--eif-border);
}
.eif-form-card .form-control:focus, .eif-form-card .form-select:focus {
  border-color: var(--eif-accent); box-shadow: 0 0 0 .2rem rgba(37,99,235,.15);
}
.eif-form-card label { font-weight: 600; color: var(--eif-ink); font-size: .92rem; }

/* ---------- Footer ---------- */
.eif-footer {
  background: var(--eif-bg-navy);
  color: var(--eif-text-invert-muted);
  padding-top: 3.5rem;
}
.eif-footer h5 { color: #fff; font-size: .95rem; letter-spacing: .04em; text-transform: uppercase; margin-bottom: 1rem; }
.eif-footer a { color: var(--eif-text-invert-muted); display: inline-block; padding: .25rem 0; }
.eif-footer a:hover { color: #fff; }
.eif-footer .eif-brand { color: #fff !important; }
.eif-footer .brand-desc { color: var(--eif-text-invert-muted); max-width: 22rem; }
.eif-footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  margin-top: 2.5rem; padding: 1.5rem 0; font-size: .88rem;
}

/* ---------- Utilities ---------- */
.eif-divider-soft { height: 1px; background: var(--eif-border); border: 0; }
.anchor-offset { scroll-margin-top: 90px; }