/* =====================================================
   fusionCore – Main Stylesheet v2
   Salesforce-native membership management
   ===================================================== */

:root {
  --c-bg:         #f8f9fc;
  --c-bg-alt:     #f0f2f7;
  --c-white:      #ffffff;
  --c-card:       #ffffff;
  --c-border:     #e2e6f0;
  --c-border-soft:#edf0f7;

  --c-primary:    #0070D2;
  --c-primary-d:  #005fb2;
  --c-primary-l:  #e8f2fc;
  --c-secondary:  #1b96ff;
  --c-accent:     #0b827c;
  --c-gold:       #f4bc25;

  --c-text:       #12213a;
  --c-text-muted: #5a6a85;
  --c-text-faint: #9aaabf;

  --font-body:    'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Sora', 'Inter', sans-serif;

  --sp-xs:  .375rem;
  --sp-sm:  .75rem;
  --sp-md:  1.25rem;
  --sp-lg:  2rem;
  --sp-xl:  3.5rem;
  --sp-2xl: 6rem;

  --container: 1160px;
  --radius-sm: .5rem;
  --radius-md: .875rem;
  --radius-lg: 1.25rem;
  --radius-xl: 1.75rem;

  --ease: cubic-bezier(.4,0,.2,1);
  --dur:  200ms;
  --dur-slow: 360ms;
  --header-h: 68px;

  --shadow-sm: 0 1px 3px rgba(18,33,58,.08), 0 1px 2px rgba(18,33,58,.04);
  --shadow-md: 0 4px 16px rgba(18,33,58,.1), 0 2px 4px rgba(18,33,58,.05);
  --shadow-lg: 0 12px 40px rgba(18,33,58,.12), 0 4px 8px rgba(18,33,58,.06);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: var(--c-primary); text-decoration: none; transition: color var(--dur) var(--ease); }
a:hover { color: var(--c-primary-d); }
ul, ol { list-style: none; }
button { cursor: pointer; font-family: inherit; }
h1,h2,h3,h4 { font-family: var(--font-display); font-weight: 700; line-height: 1.2; color: var(--c-text); }

/* ─── Utilities ──────────────────────────────────── */
.container { width: 100%; max-width: calc(var(--container) + 3rem); padding-inline: 1.5rem; margin-inline: auto; }
.py-xl { padding-block: var(--sp-xl); }
.section { padding-block: var(--sp-2xl); }
.section--alt { background: var(--c-bg-alt); }

.text-gradient {
  background: linear-gradient(135deg, var(--c-primary), var(--c-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.screen-reader-text { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(1px,1px,1px,1px); white-space: nowrap; }
.screen-reader-text:focus { width: auto; height: auto; clip: auto; top: 6px; left: 6px; padding: .75rem 1.25rem; background: var(--c-primary); color: #fff; z-index: 10000; border-radius: var(--radius-sm); }

/* ─── Buttons ────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .625rem 1.375rem; border-radius: var(--radius-sm);
  font-weight: 600; font-size: .9375rem; border: 1.5px solid transparent;
  white-space: nowrap; cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.btn--primary:hover { background: var(--c-primary-d); border-color: var(--c-primary-d); color: #fff; box-shadow: 0 0 0 3px rgba(0,112,210,.2); }
.btn--ghost { background: transparent; color: var(--c-text); border-color: var(--c-border); }
.btn--ghost:hover { background: var(--c-bg-alt); color: var(--c-text); border-color: #c8d0e0; }
.btn--sm  { padding: .45rem 1rem; font-size: .875rem; }
.btn--lg  { padding: .875rem 1.875rem; font-size: 1rem; }
.btn--full { width: 100%; justify-content: center; }

/* ─── Section headers ────────────────────────────── */
.section-header { text-align: center; margin-bottom: var(--sp-xl); }
.section-eyebrow { display: inline-block; font-size: .8125rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--c-primary); margin-bottom: .875rem; }
.section-title { font-size: clamp(1.75rem, 4vw, 2.625rem); margin-bottom: 1rem; }
.section-subtitle { font-size: 1.0625rem; color: var(--c-text-muted); max-width: 54ch; margin-inline: auto; }

/* ─── Animations ─────────────────────────────────── */
@keyframes fadeUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.animate-fade-up { animation: fadeUp .65s var(--ease) both; }
.animate-delay-1 { animation-delay: .1s; }
.animate-delay-2 { animation-delay: .2s; }
.animate-delay-3 { animation-delay: .3s; }
.animate-delay-4 { animation-delay: .45s; }
.js-reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s var(--ease), transform .6s var(--ease); transition-delay: var(--delay, 0ms); }
.js-reveal.revealed { opacity: 1; transform: none; }

/* =====================================================
   HEADER
   ===================================================== */
.site-header {
  position: sticky; top: 0; z-index: 900; height: var(--header-h);
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
  transition: box-shadow var(--dur) var(--ease);
}
.site-header.scrolled { box-shadow: var(--shadow-md); }
.site-header__inner { height: 100%; display: flex; align-items: center; gap: 2rem; }

.site-logo a,
.site-logo__text {
  font-family: var(--font-display); font-size: 1.375rem; font-weight: 800;
  color: var(--c-text); text-decoration: none; letter-spacing: -.01em;
}
.site-logo__text span { color: var(--c-primary); }
.site-logo--footer .site-logo__text { font-size: 1.25rem; }

.site-nav { margin-inline: auto; }
.nav__list { display: flex; align-items: center; gap: .25rem; }
.nav__link { padding: .45rem .875rem; border-radius: var(--radius-sm); font-size: .9375rem; font-weight: 500; color: var(--c-text-muted); transition: color var(--dur) var(--ease), background var(--dur) var(--ease); }
.nav__link:hover { color: var(--c-text); background: var(--c-bg-alt); }
.site-header__actions { display: flex; align-items: center; gap: .75rem; flex-shrink: 0; }

.hamburger { display: none; flex-direction: column; justify-content: center; gap: 5px; width: 40px; height: 40px; background: none; border: none; padding: 8px; border-radius: var(--radius-sm); }
.hamburger__bar { display: block; width: 22px; height: 2px; background: var(--c-text); border-radius: 2px; transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease); }
.hamburger[aria-expanded="true"] .hamburger__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] .hamburger__bar:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] .hamburger__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =====================================================
   HERO
   ===================================================== */
.hero {
  position: relative; overflow: hidden;
  background: linear-gradient(165deg, #f0f6ff 0%, #f8f9fc 60%);
  padding-block: 5.5rem 6rem;
  border-bottom: 1px solid var(--c-border);
}
.hero__bg {
  position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse 70% 60% at 80% 50%, rgba(0,112,210,.06), transparent),
              radial-gradient(ellipse 50% 50% at 20% 80%, rgba(11,130,124,.04), transparent);
}
.hero__inner { position: relative; z-index: 1; text-align: center; }
.hero__badge {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .375rem .875rem; border-radius: 100px;
  background: var(--c-primary-l); color: var(--c-primary);
  font-size: .8125rem; font-weight: 600; letter-spacing: .02em;
  margin-bottom: 1.75rem;
}
.hero__headline { font-size: clamp(2.25rem, 5.5vw, 3.75rem); font-weight: 800; letter-spacing: -.025em; line-height: 1.1; margin-bottom: 1.5rem; max-width: 20ch; margin-inline: auto; }
.hero__sub { font-size: clamp(1rem, 2vw, 1.175rem); color: var(--c-text-muted); max-width: 52ch; margin-inline: auto; margin-bottom: 2.5rem; }
.hero__actions { display: flex; align-items: center; justify-content: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 3rem; }
.hero__proof { display: flex; align-items: center; justify-content: center; gap: 2rem; flex-wrap: wrap; }
.hero__proof-item { display: flex; align-items: center; gap: .5rem; font-size: .9rem; color: var(--c-text-muted); font-weight: 500; }
.hero__proof-item svg { color: var(--c-accent); flex-shrink: 0; }

/* =====================================================
   PLATFORM
   ===================================================== */
.platform__grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; }
.platform-card {
  position: relative; background: var(--c-card); border: 1px solid var(--c-border);
  border-radius: var(--radius-xl); padding: 2.25rem 2rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease), border-color var(--dur-slow) var(--ease);
}
.platform-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); border-color: #c8d8f0; }
.platform-card--fusioncore { border-color: var(--c-primary); box-shadow: 0 0 0 1px var(--c-primary), var(--shadow-md); }
.platform-card--fusioncore:hover { box-shadow: 0 0 0 1px var(--c-primary), var(--shadow-lg); }
.platform-card__num { font-size: .8125rem; font-weight: 700; letter-spacing: .1em; color: var(--c-text-faint); margin-bottom: 1.25rem; }
.platform-card__icon { width: 52px; height: 52px; border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; margin-bottom: 1.25rem; background: var(--c-bg-alt); color: var(--c-primary); }
.platform-card--salesforce .platform-card__icon { background: #e8f2fc; color: var(--c-primary); }
.platform-card--fusioncore .platform-card__icon { background: var(--c-primary); color: #fff; }
.platform-card--ecosystem .platform-card__icon  { background: #e6f5f4; color: var(--c-accent); }
.platform-card__title { font-size: 1.1875rem; margin-bottom: .75rem; }
.platform-card__desc  { font-size: .9375rem; color: var(--c-text-muted); line-height: 1.65; }
.platform-card__badge { display: inline-block; margin-top: 1.25rem; padding: .25rem .75rem; background: var(--c-primary); color: #fff; border-radius: 100px; font-size: .75rem; font-weight: 600; }

/* =====================================================
   PROBLEM
   ===================================================== */
.problems__grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; }
.problem-card { background: var(--c-card); border: 1px solid var(--c-border); border-radius: var(--radius-lg); padding: 2rem; box-shadow: var(--shadow-sm); display: flex; flex-direction: column; gap: 1rem; }
.problem-card__icon { width: 44px; height: 44px; border-radius: var(--radius-sm); background: #fff4e5; color: #c9570a; display: flex; align-items: center; justify-content: center; }
.problem-card__title { font-size: 1.0625rem; }
.problem-card__desc  { font-size: .9375rem; color: var(--c-text-muted); line-height: 1.65; flex: 1; }
.problem-card__vs { background: var(--c-primary-l); border-radius: var(--radius-sm); padding: 1rem; }
.problem-card__vs-label { display: block; font-size: .75rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--c-primary); margin-bottom: .5rem; }
.problem-card__vs p { font-size: .875rem; color: var(--c-text); line-height: 1.55; }

/* =====================================================
   FEATURES
   ===================================================== */
.features__grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 1.5rem; }
.feature-card { background: var(--c-card); border: 1px solid var(--c-border); border-radius: var(--radius-lg); padding: 2rem; box-shadow: var(--shadow-sm); display: flex; flex-direction: column; gap: 1rem; transition: box-shadow var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease); }
.feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.feature-card__icon { width: 48px; height: 48px; background: var(--c-primary-l); color: var(--c-primary); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; }
.feature-card__title { font-size: 1.0625rem; }
.feature-card__desc  { font-size: .9375rem; color: var(--c-text-muted); line-height: 1.65; }

/* =====================================================
   IMPLEMENTATION
   ===================================================== */
.impl__grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; margin-bottom: 4rem; }
.impl-stat { background: var(--c-card); border: 1px solid var(--c-border); border-radius: var(--radius-lg); padding: 2rem; box-shadow: var(--shadow-sm); }
.impl-stat__val { font-family: var(--font-display); font-size: 2.75rem; font-weight: 800; color: var(--c-primary); line-height: 1; margin-bottom: .5rem; }
.impl-stat__val span { font-size: 1.75rem; }
.impl-stat__label { font-weight: 600; font-size: 1rem; margin-bottom: .75rem; }
.impl-stat__desc { font-size: .9rem; color: var(--c-text-muted); line-height: 1.6; }

/* AI block */
.impl__ai { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; background: var(--c-card); border: 1px solid var(--c-border); border-radius: var(--radius-xl); padding: 3.5rem; box-shadow: var(--shadow-md); }
.impl__ai-title { font-size: clamp(1.5rem, 3vw, 2rem); margin-block: .75rem 1rem; }
.impl__ai-desc  { font-size: .9375rem; color: var(--c-text-muted); line-height: 1.7; margin-bottom: 1.75rem; }
.impl__ai-desc strong { color: var(--c-text); }

/* AI card mock */
.ai-card { background: #0d1117; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.ai-card__header { display: flex; align-items: center; gap: .625rem; padding: .875rem 1.25rem; border-bottom: 1px solid rgba(255,255,255,.08); font-size: .8125rem; color: rgba(255,255,255,.6); font-weight: 500; }
.ai-card__dot { width: 8px; height: 8px; border-radius: 50%; }
.ai-card__dot--green { background: #22c55e; box-shadow: 0 0 6px #22c55e; }
.ai-card__body { padding: 1.25rem; display: flex; flex-direction: column; gap: .875rem; }
.ai-row { display: flex; align-items: center; gap: .75rem; }
.ai-row__label { width: 80px; height: 10px; background: rgba(255,255,255,.1); border-radius: 4px; flex-shrink: 0; }
.ai-row__bar { flex: 1; height: 8px; border-radius: 4px; background: linear-gradient(90deg, #1b96ff, #0070d2); width: var(--w); max-width: 100%; }
.ai-row__bar--warn { background: linear-gradient(90deg, #f4bc25, #e08000); }
.ai-row span { font-size: .75rem; color: rgba(255,255,255,.5); flex-shrink: 0; width: 28px; text-align: right; }
.ai-card__footer { padding: 1rem 1.25rem; border-top: 1px solid rgba(255,255,255,.08); display: flex; gap: .625rem; }
.ai-chip { padding: .3rem .875rem; border-radius: 100px; font-size: .75rem; font-weight: 600; background: rgba(27,150,255,.15); color: #1b96ff; border: 1px solid rgba(27,150,255,.3); }
.ai-chip--action { background: rgba(0,112,210,.9); color: #fff; border-color: transparent; }

/* =====================================================
   BOTTOM CTA
   ===================================================== */
.bottom-cta__inner { position: relative; overflow: hidden; background: linear-gradient(135deg, #003d7a, #0070d2); border-radius: var(--radius-xl); padding: 5rem 2rem; text-align: center; }
.bottom-cta__glow { position: absolute; inset: 0; background: radial-gradient(ellipse 60% 70% at 50% 50%, rgba(255,255,255,.08), transparent); pointer-events: none; }
.bottom-cta__title { font-size: clamp(1.75rem, 4vw, 2.5rem); color: #fff; margin-block: .875rem 1rem; }
.bottom-cta__sub { font-size: 1.0625rem; color: rgba(255,255,255,.75); max-width: 50ch; margin-inline: auto; margin-bottom: 2.25rem; }
.bottom-cta__actions { display: flex; align-items: center; justify-content: center; gap: 1rem; flex-wrap: wrap; }
.bottom-cta__inner .btn--primary { background: #fff; color: var(--c-primary); border-color: #fff; }
.bottom-cta__inner .btn--primary:hover { background: #f0f6ff; }
.bottom-cta__inner .btn--ghost { color: rgba(255,255,255,.85); border-color: rgba(255,255,255,.4); }
.bottom-cta__inner .btn--ghost:hover { background: rgba(255,255,255,.1); color: #fff; border-color: rgba(255,255,255,.6); }

/* =====================================================
   FOOTER
   ===================================================== */
.site-footer { background: var(--c-text); color: rgba(255,255,255,.65); padding-block: 4rem 2rem; }
.footer__top { display: grid; grid-template-columns: 240px 1fr; gap: 4rem; padding-bottom: 3rem; border-bottom: 1px solid rgba(255,255,255,.1); }
.footer__tagline { font-size: .9rem; margin-top: .875rem; max-width: 26ch; line-height: 1.55; }
.footer__nav { display: grid; grid-template-columns: repeat(3,1fr); gap: 2rem; }
.footer__nav-heading { font-size: .8125rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: rgba(255,255,255,.9); margin-bottom: 1rem; }
.footer__nav-list { display: flex; flex-direction: column; gap: .6rem; }
.footer__nav-list a { font-size: .9rem; color: rgba(255,255,255,.55); transition: color var(--dur) var(--ease); }
.footer__nav-list a:hover { color: rgba(255,255,255,.9); }
.footer__bottom { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; padding-top: 2rem; }
.footer__copy { font-size: .875rem; }
.footer__legal { display: flex; gap: 1.5rem; }
.footer__legal a { font-size: .875rem; color: rgba(255,255,255,.45); }
.footer__legal a:hover { color: rgba(255,255,255,.75); }
.site-footer .site-logo__text { color: #fff; }
.site-footer .site-logo__text span { color: var(--c-secondary); }

/* =====================================================
   INNER PAGES
   ===================================================== */
.page-hero { padding-block: 4rem; background: linear-gradient(165deg, #f0f6ff, #f8f9fc); border-bottom: 1px solid var(--c-border); }
.page-hero__title { font-size: clamp(2rem, 5vw, 3rem); margin-top: .75rem; }
.not-found { display: flex; justify-content: center; padding-block: 8rem; }
.not-found__inner { text-align: center; }
.not-found__code { display: block; font-size: 7rem; font-weight: 800; font-family: var(--font-display); color: var(--c-primary); line-height: 1; margin-bottom: 1rem; opacity: .15; }
.prose { font-size: 1.0625rem; line-height: 1.8; color: var(--c-text-muted); max-width: 720px; }
.prose h2,h3 { color: var(--c-text); margin-block: 2rem .75rem; }
.prose p { margin-bottom: 1.25rem; }

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 1024px) {
  .platform__grid  { grid-template-columns: 1fr; max-width: 520px; margin-inline: auto; }
  .problems__grid  { grid-template-columns: 1fr; max-width: 560px; margin-inline: auto; }
  .impl__grid      { grid-template-columns: 1fr; max-width: 480px; margin-inline: auto; }
  .impl__ai        { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer__top     { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer__nav     { grid-template-columns: repeat(3,1fr); }
}

@media (max-width: 768px) {
  :root { --header-h: 60px; }
  .site-nav, .site-header__actions { display: none; }
  .hamburger { display: flex; margin-left: auto; }
  .site-nav.is-open { display: flex; position: fixed; inset: var(--header-h) 0 0; background: rgba(255,255,255,.98); backdrop-filter: blur(12px); flex-direction: column; padding: 1.5rem; z-index: 800; overflow-y: auto; }
  .site-nav.is-open .nav__list { flex-direction: column; gap: 0; }
  .site-nav.is-open .nav__link { display: block; padding: 1rem; font-size: 1.125rem; border-bottom: 1px solid var(--c-border); color: var(--c-text); }
  .hero { padding-block: 3.5rem 4rem; }
  .hero__headline { font-size: clamp(2rem, 7vw, 2.75rem); }
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { width: 100%; max-width: 320px; justify-content: center; }
  .hero__proof { gap: 1rem; flex-direction: column; align-items: flex-start; max-width: 300px; margin-inline: auto; }
  .features__grid { grid-template-columns: 1fr; }
  .footer__nav { grid-template-columns: repeat(2,1fr); gap: 1.5rem; }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
  .impl__ai { padding: 2rem; }
}

@media (max-width: 480px) {
  .section { padding-block: 4rem; }
  .footer__nav { grid-template-columns: 1fr; }
}