/* ============================================================
   FractionalIQ — Global Stylesheet
   Reference: Betterment.com–style financial UI
   ============================================================ */

/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --navy:        #0A2540;
  --navy-light:  #133258;
  --green:       #3b82f6;
  --green-dark:  #2563eb;
  --bg-white:    #FFFFFF;
  --bg-subtle:   #F6F9FC;
  --text-dark:   #1A1A2E;
  --text-muted:  #6B7280;
  --text-light:  #9CA3AF;
  --border:      #E5EAF0;
  --radius:      8px;
  --radius-lg:   16px;
  --shadow-sm:   0 1px 3px rgba(10,37,64,.08);
  --shadow-md:   0 4px 16px rgba(10,37,64,.10);
  --shadow-lg:   0 12px 40px rgba(10,37,64,.12);
  --font:        'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-w:       1160px;
  --section-y:   100px;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  color: var(--text-dark);
  background: var(--bg-white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ── Utility ──────────────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ── Typography ───────────────────────────────────────────── */
h1, h2, h3, h4 {
  color: var(--navy);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

/* ── Nav ──────────────────────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.2s;
}

.nav.scrolled {
  box-shadow: var(--shadow-sm);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: -0.03em;
}

.nav__logo-mark {
  width: 34px;
  height: 34px;
  background: var(--navy);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.nav__logo-mark svg {
  width: 18px;
  height: 18px;
}

.nav__logo-text span {
  color: var(--green);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav__links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color 0.15s;
}

.nav__links a:hover {
  color: var(--navy);
}

.nav__cta {
  display: flex;
  gap: 12px;
  align-items: center;
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius);
  font-family: var(--font);
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: background 0.15s, color 0.15s, border-color 0.15s, transform 0.1s, box-shadow 0.15s;
  white-space: nowrap;
}

.btn:active { transform: translateY(1px); }

.btn--primary {
  background: var(--green);
  color: #FFFFFF;
  border-color: var(--green);
}

.btn--primary:hover {
  background: var(--green-dark);
  border-color: var(--green-dark);
  box-shadow: 0 4px 12px rgba(59,130,246,.30);
}

.btn--secondary {
  background: transparent;
  color: var(--navy);
  border-color: var(--border);
}

.btn--secondary:hover {
  border-color: var(--navy);
  background: var(--bg-subtle);
}

.btn--ghost {
  background: transparent;
  color: var(--text-muted);
  border-color: transparent;
  padding-left: 0;
  padding-right: 0;
}

.btn--ghost:hover {
  color: var(--navy);
}

.btn--lg {
  padding: 16px 32px;
  font-size: 1.0625rem;
  border-radius: 10px;
}

.btn--sm {
  padding: 8px 16px;
  font-size: 0.875rem;
}

/* ── Hero ─────────────────────────────────────────────────── */
.hero {
  padding-top: 160px;
  padding-bottom: var(--section-y);
  background: linear-gradient(160deg, var(--bg-white) 55%, #eff6ff 100%);
  overflow: hidden;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(59,130,246,.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 24px;
}

.hero__eyebrow-dot {
  width: 6px; height: 6px;
  background: var(--green);
  border-radius: 50%;
}

.hero__headline {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  color: var(--navy);
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero__headline em {
  font-style: normal;
  color: var(--green);
}

.hero__sub {
  font-size: 1.1875rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 40px;
  max-width: 480px;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.hero__trust {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 40px;
  color: var(--text-light);
  font-size: 0.875rem;
}

.hero__trust-divider {
  width: 1px;
  height: 14px;
  background: var(--border);
}

/* Hero visual */
.hero__visual {
  position: relative;
}

.hero__card-stack {
  position: relative;
  width: 100%;
  max-width: 480px;
  margin-left: auto;
}

.metric-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  box-shadow: var(--shadow-lg);
}

.metric-card__label {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 12px;
}

.metric-card__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 20px;
}

.metric-card__value {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--navy);
  letter-spacing: -0.03em;
}

.metric-card__badge {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--green);
  background: rgba(59,130,246,.10);
  padding: 4px 10px;
  border-radius: 20px;
}

.metric-card__bar-wrap {
  background: var(--bg-subtle);
  border-radius: 4px;
  height: 6px;
  overflow: hidden;
  margin-bottom: 16px;
}

.metric-card__bar {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--green) 0%, #93c5fd 100%);
  width: 0%;
  transition: width 1.2s cubic-bezier(.16,1,.3,1);
}

.metric-card__meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.mini-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 14px;
  position: absolute;
}

.mini-card--top-right {
  top: -24px;
  right: -24px;
  min-width: 180px;
}

.mini-card--bottom-left {
  bottom: -24px;
  left: -24px;
  min-width: 200px;
}

.mini-card__icon {
  width: 36px; height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
}

.mini-card__icon--green { background: rgba(59,130,246,.12); }
.mini-card__icon--navy  { background: rgba(10,37,64,.08); }

.mini-card__title {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--navy);
}

.mini-card__sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ── Logos / social proof strip ───────────────────────────── */
.social-proof {
  padding: 40px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.social-proof__inner {
  display: flex;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
}

.social-proof__label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  white-space: nowrap;
}

.social-proof__logos {
  display: flex;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
}

.platform-logo {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: -0.02em;
  opacity: 0.7;
  transition: opacity 0.15s;
}

.platform-logo:hover { opacity: 1; }

/* ── Sections ─────────────────────────────────────────────── */
.section {
  padding: var(--section-y) 0;
}

.section--alt {
  background: var(--bg-subtle);
}

.section__header {
  max-width: 640px;
  margin-bottom: 64px;
}

.section__header--centered {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section__eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--green);
  display: block;
  margin-bottom: 16px;
}

.section__title {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 20px;
  letter-spacing: -0.025em;
}

.section__desc {
  font-size: 1.0625rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ── Platform Cards ───────────────────────────────────────── */
.platform-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.platform-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 44px;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  gap: 0;
  transition: box-shadow 0.2s, border-color 0.2s, transform 0.2s;
  position: relative;
  overflow: hidden;
}

.platform-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 4px;
  background: var(--green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s cubic-bezier(.16,1,.3,1);
}

.platform-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(59,130,246,.3);
  transform: translateY(-4px);
}

.platform-card:hover::after {
  transform: scaleX(1);
}

.platform-card:focus-visible {
  outline: 3px solid var(--green);
  outline-offset: 3px;
}

.platform-card__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  background: rgba(59,130,246,.10);
  color: var(--green);
  border-radius: 20px;
  padding: 4px 12px;
  margin-bottom: 32px;
  width: fit-content;
}

.platform-card__badge-dot {
  width: 6px; height: 6px;
  background: var(--green);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.platform-card__icon {
  width: 56px; height: 56px;
  border-radius: var(--radius);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 24px;
}

.platform-card__name {
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.platform-card__desc {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.65;
  margin-bottom: 32px;
  flex: 1;
}

.platform-card__stats {
  display: flex;
  gap: 32px;
  padding: 24px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}

.stat__value {
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--navy);
  letter-spacing: -0.02em;
}

.stat__label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.platform-card__link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--green);
  text-decoration: none;
  transition: gap 0.15s;
}

.platform-card:hover .platform-card__link {
  gap: 12px;
}

/* ── Features grid ────────────────────────────────────────── */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
}

.feature-card__icon {
  width: 48px; height: 48px;
  border-radius: var(--radius);
  background: rgba(59,130,246,.10);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  margin-bottom: 20px;
}

.feature-card__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.feature-card__desc {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ── Manifesto / philosophy strip ──────────────────────────── */
.manifesto {
  background: var(--navy);
  padding: var(--section-y) 0;
  position: relative;
  overflow: hidden;
}

.manifesto::before {
  content: '';
  position: absolute;
  top: -120px; left: -120px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(59,130,246,.1) 0%, transparent 70%);
  pointer-events: none;
}

.manifesto::after {
  content: '';
  position: absolute;
  bottom: -100px; right: -100px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(59,130,246,.06) 0%, transparent 70%);
  pointer-events: none;
}

.manifesto__inner {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.manifesto__quote {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  color: rgba(255,255,255,.92);
  line-height: 1.5;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
}

.manifesto__quote em {
  font-style: normal;
  color: var(--green);
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
  text-align: left;
}

.principle {
  border-left: 2px solid rgba(59,130,246,.3);
  padding-left: 20px;
}

.principle__title {
  font-size: 0.9375rem;
  font-weight: 700;
  color: rgba(255,255,255,.9);
  margin-bottom: 6px;
}

.principle__text {
  font-size: 0.875rem;
  color: rgba(255,255,255,.5);
  line-height: 1.6;
}

/* ── CTA ──────────────────────────────────────────────────── */
.cta-section {
  padding: var(--section-y) 0;
  background: linear-gradient(135deg, var(--bg-subtle) 0%, #eff6ff 100%);
}

.cta-section__inner {
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cta-section__title {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 20px;
  letter-spacing: -0.025em;
}

.cta-section__desc {
  font-size: 1.0625rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  line-height: 1.7;
}

.cta-section__actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Footer ───────────────────────────────────────────────── */
.footer {
  background: var(--navy);
  color: rgba(255,255,255,.6);
  padding: 60px 0 40px;
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.footer__brand p {
  font-size: 0.875rem;
  line-height: 1.65;
  max-width: 260px;
  margin-top: 16px;
}

.footer__nav-group h4 {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: rgba(255,255,255,.4);
  margin-bottom: 16px;
}

.footer__nav-group ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__nav-group a {
  color: rgba(255,255,255,.6);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color 0.15s;
}

.footer__nav-group a:hover {
  color: rgba(255,255,255,.95);
}

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer__bottom p {
  font-size: 0.8125rem;
}

.footer__disclaimer {
  max-width: 480px;
  font-size: 0.75rem;
  color: rgba(255,255,255,.3);
  line-height: 1.6;
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 1024px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero__card-stack {
    margin: 0 auto;
  }

  .platform-grid {
    grid-template-columns: 1fr;
  }

  .feature-grid {
    grid-template-columns: 1fr 1fr;
  }

  .principles {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --section-y: 64px;
  }

  .nav__links {
    display: none;
  }

  .hero {
    padding-top: 120px;
    text-align: center;
  }

  .hero__sub {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
  }

  .hero__actions {
    justify-content: center;
  }

  .hero__trust {
    justify-content: center;
    flex-wrap: wrap;
    gap: 4px;
  }

  .mini-card--top-right,
  .mini-card--bottom-left {
    display: none;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .principles {
    grid-template-columns: 1fr;
  }

  .footer__inner {
    flex-direction: column;
  }

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }

  .social-proof__inner {
    flex-direction: column;
    gap: 24px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .platform-card {
    padding: 32px 28px;
  }

  .platform-card__stats {
    gap: 20px;
  }

  .hero__actions {
    flex-direction: column;
    align-items: center;
    width: 100%;
  }

  .hero__actions .btn {
    width: 100%;
    justify-content: center;
  }
}

/* ── Animations ───────────────────────────────────────────── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

.animate-fade-up {
  opacity: 0;
  animation: fadeUp 0.6s cubic-bezier(.16,1,.3,1) forwards;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}