/* ============================================================
   F2B Solutions — Design System (shared across all site pages)
   ============================================================ */

:root {
  --bg: #0B1020;
  --bg-elevated: #10162c;
  --bg-card: #131a33;
  --border: rgba(255, 255, 255, 0.08);
  --border-soft: rgba(255, 255, 255, 0.05);
  --blue: #2563FF;
  --purple: #8B5CF6;
  --white: #FFFFFF;
  --text: #F4F6FB;
  --text-muted: #9AA3BF;
  --text-faint: #6B7394;
  --accent-gradient: linear-gradient(120deg, var(--blue) 0%, var(--purple) 100%);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-card: 0 20px 60px -20px rgba(37, 99, 255, 0.25);
  --max-width: 1120px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 15% -10%, rgba(37, 99, 255, 0.20), transparent 40%),
    radial-gradient(circle at 85% 10%, rgba(139, 92, 246, 0.16), transparent 45%),
    var(--bg);
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Typography ---------- */

h1, h2, h3, h4 {
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}

h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); }
h3 { font-size: 1.25rem; }

p { margin: 0 0 16px; color: var(--text-muted); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.gradient-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section-head {
  max-width: 640px;
  margin: 0 0 48px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.lead {
  font-size: 1.15rem;
  color: var(--text-muted);
}

/* ---------- Layout sections ---------- */

section { padding: 96px 0; }

@media (max-width: 640px) {
  section { padding: 64px 0; }
}

.section-alt {
  background: linear-gradient(180deg, transparent, rgba(255,255,255,0.02) 20%, rgba(255,255,255,0.02) 80%, transparent);
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
}

/* ---------- Header / Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 16, 32, 0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-soft);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.1rem;
}

.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.brand-mark-img {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
  object-fit: contain;
}

.brand-sub {
  color: var(--text-faint);
  font-weight: 500;
  font-size: 0.82rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 0.92rem;
  color: var(--text-muted);
  font-weight: 500;
  transition: color 0.15s ease;
}

.nav-links a:hover { color: var(--text); }

.nav-right {
  display: flex;
  align-items: center;
  gap: 18px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--text-muted);
  font-weight: 600;
}
.back-link:hover { color: var(--text); }

/* Language toggle */

.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
  background: var(--bg-elevated);
}

.lang-toggle button {
  border: none;
  background: transparent;
  color: var(--text-faint);
  font-family: var(--font);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.lang-toggle button.active {
  background: var(--accent-gradient);
  color: var(--white);
}

.nav-toggle-btn {
  display: none;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  border-radius: 8px;
  padding: 8px 10px;
  cursor: pointer;
}

@media (max-width: 780px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-soft);
    padding: 16px 24px 20px;
  }
  .nav-links a { padding: 10px 0; width: 100%; }
  .nav-links.nav-links-open { display: flex; }
  .nav-toggle-btn { display: inline-flex; }
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

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

.btn-primary {
  background: var(--accent-gradient);
  color: var(--white);
  box-shadow: 0 12px 30px -10px rgba(37, 99, 255, 0.55);
}

.btn-primary:hover { box-shadow: 0 16px 36px -8px rgba(139, 92, 246, 0.55); }

.btn-ghost {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}

.btn-ghost:hover { border-color: rgba(255,255,255,0.24); }

.btn-row { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- Hero ---------- */

.hero {
  padding: 96px 0 72px;
  text-align: center;
}

.hero .lead { max-width: 640px; margin-left: auto; margin-right: auto; }

.hero-actions { justify-content: center; margin-top: 8px; }

/* ---------- Cards / product grid ---------- */

.grid {
  display: grid;
  gap: 24px;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

@media (max-width: 900px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.card:hover { border-color: rgba(139, 92, 246, 0.35); }

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(37, 99, 255, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 18px;
}

.card h3 { margin-bottom: 8px; }
.card p { margin-bottom: 0; font-size: 0.95rem; }

/* Product card (clickable) */

.product-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.product-card:hover {
  border-color: rgba(139, 92, 246, 0.4);
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
}

.product-card img {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  margin-bottom: 18px;
}

.product-card .status {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.status-dev {
  background: rgba(37, 99, 255, 0.14);
  color: #8fb1ff;
}

.product-card .cta {
  margin-top: 18px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--blue);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* Placeholder "coming soon" card */

.card-placeholder {
  border-style: dashed;
  border-color: var(--border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--text-faint);
  min-height: 220px;
}

.card-placeholder .plus {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px dashed var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 14px;
  color: var(--text-faint);
}

/* ---------- Steps / how it works ---------- */

.steps {
  counter-reset: step;
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }

.step {
  position: relative;
  padding: 24px 20px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.step-num {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--accent-gradient);
  color: var(--white);
  font-weight: 800;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.step h4 { margin: 0 0 6px; font-size: 1rem; }
.step p { font-size: 0.88rem; margin: 0; }

/* ---------- Pricing ---------- */

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

.pricing-card.highlight {
  border-color: rgba(139, 92, 246, 0.45);
  background: linear-gradient(180deg, rgba(139, 92, 246, 0.08), var(--bg-card) 40%);
  position: relative;
}

.pricing-badge {
  position: absolute;
  top: -13px;
  right: 24px;
  background: var(--accent-gradient);
  color: var(--white);
  font-size: 0.72rem;
  font-weight: 800;
  padding: 5px 12px;
  border-radius: 999px;
  letter-spacing: 0.02em;
}

.price {
  font-size: 2.2rem;
  font-weight: 800;
  margin: 10px 0 4px;
}

.price span { font-size: 0.95rem; color: var(--text-faint); font-weight: 600; }

.feature-list {
  list-style: none;
  padding: 0;
  margin: 22px 0 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.feature-list li .tick {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(37, 99, 255, 0.16);
  color: #8fb1ff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.68rem;
  margin-top: 2px;
}

/* ---------- Callout / note boxes ---------- */

.note {
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.note strong { color: var(--text); }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border-soft);
  padding: 56px 0 32px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.footer-brand p {
  max-width: 320px;
  font-size: 0.9rem;
}

.footer-cols {
  display: flex;
  gap: 56px;
  flex-wrap: wrap;
}

.footer-col h4 {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  margin-bottom: 14px;
}

.footer-col a, .footer-col span {
  display: block;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.footer-col a:hover { color: var(--text); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  border-top: 1px solid var(--border-soft);
  font-size: 0.82rem;
  color: var(--text-faint);
}

/* ---------- Utility ---------- */

.mt-0 { margin-top: 0; }
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }