/* LMS B2B — Marketing site
   Design tokens chosen for a low-learning-curve, polished feel.
   Pairs with vendored Bootstrap 5 (no CDN). */

:root {
  --c-bg:        #ffffff;
  --c-bg-soft:   #f7f8fb;
  --c-ink:       #0f172a;
  --c-ink-soft:  #475569;
  --c-line:      #e2e8f0;
  --c-primary:   #2563eb;
  --c-primary-d: #1d4ed8;
  --c-accent:    #f59e0b;
  --c-success:   #16a34a;
  --c-danger:    #dc2626;
  --r-card:      14px;
  --r-btn:       10px;
  --shadow-sm:   0 1px 2px rgba(15,23,42,.06);
  --shadow-md:   0 6px 18px rgba(15,23,42,.08);
  --shadow-lg:   0 18px 40px rgba(15,23,42,.12);
  --font-body:   "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--c-ink);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--c-primary); text-decoration: none; }
a:hover { color: var(--c-primary-d); text-decoration: underline; }

.btn { border-radius: var(--r-btn); font-weight: 600; padding: .55rem 1.1rem; }
.btn-primary { background: var(--c-primary); border-color: var(--c-primary); }
.btn-primary:hover { background: var(--c-primary-d); border-color: var(--c-primary-d); }
.btn-outline-secondary { color: var(--c-ink); border-color: var(--c-line); }
.btn-outline-secondary:hover { background: var(--c-bg-soft); color: var(--c-ink); border-color: var(--c-line); }

/* ---- Nav -------------------------------------------------------------- */
.lms-nav {
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--c-line);
  padding: .75rem 0;
}
.lms-nav .navbar-brand { color: var(--c-ink); font-size: 1.15rem; }
.lms-nav .nav-link { color: var(--c-ink-soft); font-weight: 500; }
.lms-nav .nav-link:hover { color: var(--c-ink); }
.lms-brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; margin-right: .55rem;
  background: linear-gradient(135deg, var(--c-primary), #6366f1);
  color: #fff; font-weight: 800; border-radius: 8px;
  font-size: .9rem;
}

/* ---- Hero ------------------------------------------------------------- */
.lms-hero {
  position: relative;
  padding: 6rem 0 5rem;
  background:
    radial-gradient(1200px 500px at 50% -100px, rgba(37,99,235,.10), transparent 60%),
    linear-gradient(180deg, #ffffff 0%, var(--c-bg-soft) 100%);
}
.lms-hero h1 {
  font-size: clamp(2.2rem, 4.6vw, 3.4rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.02em;
  margin-bottom: 1.2rem;
}
.lms-hero p.lead {
  font-size: 1.15rem;
  color: var(--c-ink-soft);
  max-width: 36ch;
}
.lms-hero .pill {
  display: inline-flex; align-items: center; gap: .4rem;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-line);
  border-radius: 999px;
  padding: .35rem .8rem;
  font-size: .85rem;
  color: var(--c-ink-soft);
  margin-bottom: 1.5rem;
}
.lms-hero .pill .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--c-success);
}
.lms-hero-screenshot {
  border-radius: var(--r-card);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--c-line);
  background: #fff;
}

/* ---- Sections --------------------------------------------------------- */
section { padding: 5rem 0; }
section.alt { background: var(--c-bg-soft); }
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -.02em;
  margin-bottom: .75rem;
}
.section-sub {
  color: var(--c-ink-soft);
  font-size: 1.05rem;
  max-width: 56ch;
  margin: 0 auto 2.5rem;
}

/* ---- Feature cards ---------------------------------------------------- */
.feature {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  padding: 1.75rem;
  height: 100%;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.feature:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
}
.feature .icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, rgba(37,99,235,.1), rgba(99,102,241,.1));
  color: var(--c-primary);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 1rem;
}
.feature h5 { font-weight: 700; margin-bottom: .35rem; }
.feature p { color: var(--c-ink-soft); margin: 0; }

/* ---- Pricing cards ---------------------------------------------------- */
.plan {
  background: #fff;
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  padding: 2rem;
  height: 100%;
  position: relative;
  transition: transform .18s ease, box-shadow .18s ease;
}
.plan:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.plan.popular { border-color: var(--c-primary); box-shadow: var(--shadow-md); }
.plan .badge-popular {
  position: absolute; top: -10px; right: 16px;
  background: var(--c-primary); color: #fff; padding: .25rem .55rem;
  border-radius: 999px; font-size: .7rem; font-weight: 700; letter-spacing: .04em;
}
.plan .price { font-size: 2.4rem; font-weight: 800; letter-spacing: -.02em; }
.plan .price small { font-size: .9rem; color: var(--c-ink-soft); font-weight: 500; }
.plan ul { list-style: none; padding: 0; margin: 1.25rem 0; }
.plan ul li { padding: .35rem 0; color: var(--c-ink-soft); display: flex; gap: .5rem; }
.plan ul li::before { content: "\2713"; color: var(--c-success); font-weight: 800; }

/* ---- Footer ----------------------------------------------------------- */
.lms-footer {
  background: var(--c-bg-soft);
  border-top: 1px solid var(--c-line);
  margin-top: 4rem;
}
.lms-footer h6 { letter-spacing: .08em; font-size: .75rem; }
.lms-footer ul li { padding: .2rem 0; }
.lms-footer ul li a { color: var(--c-ink-soft); }
.lms-footer ul li a:hover { color: var(--c-ink); text-decoration: none; }

/* ---- Empty states / utilities ---------------------------------------- */
.muted { color: var(--c-ink-soft); }
.kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: var(--c-bg-soft);
  border: 1px solid var(--c-line);
  border-radius: 6px;
  padding: .1rem .4rem;
  font-size: .85em;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}