/* BytePay Landing — Production Fintech UI */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  --bp-primary: #0F172A;
  --bp-secondary: #1E293B;
  --bp-accent: #14B8A6;
  --bp-accent-hover: #0D9488;
  --bp-success: #10B981;
  --bp-bg: #F8FAFC;
  --bp-text: #0F172A;
  --bp-muted: #64748B;
  --bp-border: #E2E8F0;
  --bp-white: #FFFFFF;
  --bp-dark-bg: #0B1220;
  --bp-gradient: linear-gradient(135deg, #14B8A6 0%, #0EA5E9 50%, #6366F1 100%);
  --bp-gradient-dark: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
  --bp-shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --bp-shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
  --bp-shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
  --bp-radius: 12px;
  --bp-radius-lg: 20px;
  --bp-container: 1200px;
  --bp-header-h: 72px;
  --bp-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --bp-font: 'Inter', system-ui, -apple-system, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--bp-header-h); }
body {
  font-family: var(--bp-font);
  color: var(--bp-text);
  background: var(--bp-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--bp-transition); }
ul { list-style: none; }
button, input, textarea, select { font: inherit; }

.container { width: min(100% - 2rem, var(--bp-container)); margin-inline: auto; }
.section { padding: 5rem 0; }
.section--dark { background: var(--bp-gradient-dark); color: var(--bp-white); }
.section--alt { background: var(--bp-white); }
.section__kicker {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--bp-accent);
  margin-bottom: 0.75rem;
}
.section__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}
.section__desc { color: var(--bp-muted); font-size: 1.05rem; max-width: 640px; }
.section--dark .section__desc { color: #94A3B8; }
.text-center { text-align: center; }
.text-center .section__desc { margin-inline: auto; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: 10px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--bp-transition);
  white-space: nowrap;
}
.btn--primary {
  background: var(--bp-accent);
  color: var(--bp-white);
  border-color: var(--bp-accent);
}
.btn--primary:hover { background: var(--bp-accent-hover); border-color: var(--bp-accent-hover); transform: translateY(-1px); box-shadow: 0 8px 20px rgba(20, 184, 166, 0.35); }
.btn--secondary {
  background: var(--bp-white);
  color: var(--bp-primary);
  border-color: var(--bp-border);
}
.btn--secondary:hover { border-color: var(--bp-accent); color: var(--bp-accent); }
.btn--ghost {
  background: transparent;
  color: var(--bp-white);
  border-color: rgba(255,255,255,0.3);
}
.btn--ghost:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.5); }
.btn--dark { background: var(--bp-primary); color: var(--bp-white); border-color: var(--bp-primary); }
.btn--dark:hover { background: var(--bp-secondary); }
.btn--lg { padding: 1rem 2rem; font-size: 1rem; }
.btn-group { display: flex; flex-wrap: wrap; gap: 1rem; }

/* Header */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--bp-header-h);
  background: rgba(248, 250, 252, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: all var(--bp-transition);
}
.header.is-scrolled { background: rgba(255,255,255,0.95); border-color: var(--bp-border); box-shadow: var(--bp-shadow-sm); }
.header__inner { display: flex; align-items: center; justify-content: space-between; height: 100%; gap: 1.5rem; }
.logo { display: flex; align-items: center; gap: 0.625rem; font-weight: 800; font-size: 1.25rem; color: var(--bp-primary); }
.logo__icon { width: 36px; height: 36px; }
.nav { display: flex; align-items: center; gap: 0.25rem; }
.nav__link {
  padding: 0.5rem 0.875rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--bp-secondary);
  border-radius: 8px;
}
.nav__link:hover, .nav__link.is-active { color: var(--bp-accent); }
.nav__item { position: relative; }
.nav__dropdown {
  position: absolute;
  top: calc(100% + 0.5rem);
  left: 0;
  min-width: 220px;
  background: var(--bp-white);
  border: 1px solid var(--bp-border);
  border-radius: var(--bp-radius);
  box-shadow: var(--bp-shadow-lg);
  padding: 0.5rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--bp-transition);
}
.nav__item:hover .nav__dropdown, .nav__item:focus-within .nav__dropdown {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.nav__dropdown a {
  display: block;
  padding: 0.625rem 0.875rem;
  font-size: 0.875rem;
  border-radius: 8px;
  color: var(--bp-secondary);
}
.nav__dropdown a:hover { background: var(--bp-bg); color: var(--bp-accent); }
.header__actions { display: flex; align-items: center; gap: 0.75rem; }
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}
.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--bp-primary);
  border-radius: 2px;
  transition: var(--bp-transition);
}
.menu-toggle.is-open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.is-open span:nth-child(2) { opacity: 0; }
.menu-toggle.is-open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Hero */
.hero {
  padding: calc(var(--bp-header-h) + 4rem) 0 5rem;
  background: radial-gradient(ellipse 80% 60% at 50% -20%, rgba(20,184,166,0.15), transparent),
              var(--bp-bg);
  overflow: hidden;
}
.hero__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: center; }
.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.875rem;
  background: rgba(20,184,166,0.1);
  border: 1px solid rgba(20,184,166,0.25);
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--bp-accent-hover);
  margin-bottom: 1.25rem;
}
.hero__title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 1.25rem;
}
.hero__title span { background: var(--bp-gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero__subtitle { font-size: 1.125rem; color: var(--bp-muted); margin-bottom: 2rem; max-width: 540px; }
.hero__mockup {
  background: var(--bp-white);
  border: 1px solid var(--bp-border);
  border-radius: var(--bp-radius-lg);
  box-shadow: var(--bp-shadow-lg);
  overflow: hidden;
  animation: float 6s ease-in-out infinite;
}
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
.mockup__bar {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.875rem 1rem;
  background: var(--bp-bg);
  border-bottom: 1px solid var(--bp-border);
}
.mockup__dot { width: 10px; height: 10px; border-radius: 50%; }
.mockup__dot--r { background: #EF4444; }
.mockup__dot--y { background: #F59E0B; }
.mockup__dot--g { background: #10B981; }
.mockup__body { padding: 1.25rem; }
.mockup__balance {
  background: var(--bp-gradient-dark);
  color: var(--bp-white);
  border-radius: var(--bp-radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.mockup__balance-label { font-size: 0.75rem; opacity: 0.7; margin-bottom: 0.25rem; }
.mockup__balance-value { font-size: 1.75rem; font-weight: 800; }
.mockup__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.75rem; }
.mockup__card {
  background: var(--bp-bg);
  border-radius: 10px;
  padding: 0.875rem;
  font-size: 0.75rem;
}
.mockup__card strong { display: block; font-size: 0.8125rem; margin-bottom: 0.25rem; }
.mockup__tx { margin-top: 1rem; }
.mockup__tx-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.625rem 0;
  border-bottom: 1px solid var(--bp-border);
  font-size: 0.8125rem;
}
.mockup__tx-item:last-child { border-bottom: none; }
.mockup__tx-amount--in { color: var(--bp-success); font-weight: 600; }
.mockup__tx-amount--out { color: #EF4444; font-weight: 600; }

/* Trust logos */
.trust { padding: 3rem 0; border-bottom: 1px solid var(--bp-border); }
.trust__label { text-align: center; font-size: 0.8125rem; font-weight: 600; color: var(--bp-muted); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 1.5rem; }
.trust__grid { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 2rem 3rem; }
.trust__logo {
  font-size: 0.9375rem;
  font-weight: 700;
  color: #94A3B8;
  opacity: 0.7;
  transition: opacity var(--bp-transition);
}
.trust__logo:hover { opacity: 1; }

/* Grid & Cards */
.grid { display: grid; gap: 1.5rem; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: var(--bp-white);
  border: 1px solid var(--bp-border);
  border-radius: var(--bp-radius);
  padding: 1.75rem;
  transition: all var(--bp-transition);
}
.card:hover { border-color: rgba(20,184,166,0.4); box-shadow: var(--bp-shadow); transform: translateY(-4px); }
.card__icon {
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(20,184,166,0.1);
  border-radius: 12px;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}
.card__title { font-size: 1.125rem; font-weight: 700; margin-bottom: 0.5rem; }
.card__text { font-size: 0.9375rem; color: var(--bp-muted); margin-bottom: 1rem; }
.card__list { font-size: 0.875rem; color: var(--bp-muted); }
.card__list li { padding: 0.25rem 0; padding-left: 1.25rem; position: relative; }
.card__list li::before { content: '✓'; position: absolute; left: 0; color: var(--bp-accent); font-weight: 700; }
.card--dark {
  background: var(--bp-secondary);
  border-color: rgba(255,255,255,0.08);
  color: var(--bp-white);
}
.card--dark .card__text, .card--dark .card__list { color: #94A3B8; }
.card--featured { border-color: var(--bp-accent); box-shadow: 0 0 0 1px var(--bp-accent); position: relative; }
.card--featured::before {
  content: 'Popular';
  position: absolute;
  top: -12px; left: 50%;
  transform: translateX(-50%);
  background: var(--bp-accent);
  color: white;
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  text-transform: uppercase;
}

/* Stats */
.stats { background: var(--bp-primary); color: var(--bp-white); padding: 4rem 0; }
.stats__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; text-align: center; }
.stat__value {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  background: var(--bp-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat__label { font-size: 0.9375rem; color: #94A3B8; margin-top: 0.25rem; }

/* Code block */
.code-block {
  background: #0B1220;
  border-radius: var(--bp-radius);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.08);
}
.code-block__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  font-size: 0.8125rem;
  color: #94A3B8;
}
.code-block pre {
  padding: 1.25rem;
  overflow-x: auto;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: #E2E8F0;
  font-family: 'SF Mono', 'Fira Code', monospace;
}
.code-block .kw { color: #C084FC; }
.code-block .str { color: #34D399; }
.code-block .key { color: #67E8F9; }
.code-block .num { color: #FBBF24; }

/* Testimonials */
.testimonial-slider { position: relative; overflow: hidden; }
.testimonial-track { display: flex; transition: transform 0.5s ease; }
.testimonial-slide { min-width: 100%; padding: 0 0.5rem; }
.testimonial-card {
  background: var(--bp-white);
  border: 1px solid var(--bp-border);
  border-radius: var(--bp-radius-lg);
  padding: 2rem;
  max-width: 720px;
  margin: 0 auto;
}
.testimonial-card__quote { font-size: 1.125rem; line-height: 1.7; margin-bottom: 1.5rem; color: var(--bp-secondary); }
.testimonial-card__author { display: flex; align-items: center; gap: 1rem; }
.testimonial-card__avatar {
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--bp-gradient);
  display: flex; align-items: center; justify-content: center;
  color: white; font-weight: 700; font-size: 1rem;
}
.testimonial-card__name { font-weight: 700; }
.testimonial-card__role { font-size: 0.875rem; color: var(--bp-muted); }
.slider-dots { display: flex; justify-content: center; gap: 0.5rem; margin-top: 1.5rem; }
.slider-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--bp-border);
  border: none;
  cursor: pointer;
  transition: var(--bp-transition);
}
.slider-dot.is-active { background: var(--bp-accent); width: 24px; border-radius: 4px; }

/* CTA */
.cta {
  background: var(--bp-gradient-dark);
  border-radius: var(--bp-radius-lg);
  padding: 4rem 2rem;
  text-align: center;
  color: var(--bp-white);
  position: relative;
  overflow: hidden;
}
.cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(20,184,166,0.2), transparent 60%);
  pointer-events: none;
}
.cta__title { font-size: clamp(1.75rem, 4vw, 2.25rem); font-weight: 800; margin-bottom: 1rem; position: relative; }
.cta__desc { color: #94A3B8; margin-bottom: 2rem; max-width: 520px; margin-inline: auto; position: relative; }
.cta .btn-group { justify-content: center; position: relative; }

/* Footer */
.footer {
  background: var(--bp-primary);
  color: #94A3B8;
  padding: 4rem 0 2rem;
}
.footer__grid { display: grid; grid-template-columns: 2fr repeat(4, 1fr); gap: 2rem; margin-bottom: 3rem; }
.footer__brand p { font-size: 0.9375rem; margin: 1rem 0 1.5rem; max-width: 280px; }
.footer__heading { color: var(--bp-white); font-weight: 700; font-size: 0.875rem; margin-bottom: 1rem; }
.footer__links li { margin-bottom: 0.5rem; }
.footer__links a { font-size: 0.875rem; }
.footer__links a:hover { color: var(--bp-accent); }
.footer__newsletter { display: flex; gap: 0.5rem; margin-top: 0.5rem; }
.footer__newsletter input {
  flex: 1;
  padding: 0.625rem 0.875rem;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 8px;
  background: rgba(255,255,255,0.05);
  color: white;
}
.footer__newsletter input::placeholder { color: #64748B; }
.footer__social { display: flex; gap: 0.75rem; margin-top: 1rem; }
.footer__social a {
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 8px;
  background: rgba(255,255,255,0.08);
  font-size: 0.875rem;
  transition: var(--bp-transition);
}
.footer__social a:hover { background: var(--bp-accent); color: white; }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.8125rem;
}

/* FAQ */
.faq { max-width: 720px; margin: 0 auto; }
.faq__item { border-bottom: 1px solid var(--bp-border); }
.faq__question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 0;
  background: none;
  border: none;
  text-align: left;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  color: var(--bp-primary);
}
.faq__question::after { content: '+'; font-size: 1.25rem; color: var(--bp-accent); transition: transform var(--bp-transition); }
.faq__item.is-open .faq__question::after { transform: rotate(45deg); }
.faq__answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.faq__answer-inner { padding-bottom: 1.25rem; color: var(--bp-muted); font-size: 0.9375rem; }
.faq__item.is-open .faq__answer { max-height: 300px; }

/* Forms */
.form-group { margin-bottom: 1.25rem; }
.form-label { display: block; font-size: 0.875rem; font-weight: 600; margin-bottom: 0.375rem; }
.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--bp-border);
  border-radius: 10px;
  background: var(--bp-white);
  transition: border-color var(--bp-transition);
}
.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--bp-accent);
  box-shadow: 0 0 0 3px rgba(20,184,166,0.15);
}
.form-input.is-invalid { border-color: #EF4444; }
.form-error { font-size: 0.8125rem; color: #EF4444; margin-top: 0.25rem; display: none; }
.form-input.is-invalid + .form-error { display: block; }
.form-textarea { min-height: 140px; resize: vertical; }

/* Page hero (inner pages) */
.page-hero {
  padding: calc(var(--bp-header-h) + 3rem) 0 3rem;
  background: var(--bp-gradient-dark);
  color: var(--bp-white);
  text-align: center;
}
.page-hero__title { font-size: clamp(2rem, 4vw, 2.75rem); font-weight: 800; margin-bottom: 0.75rem; }
.page-hero__desc { color: #94A3B8; max-width: 600px; margin-inline: auto; }

/* Pricing */
.price { font-size: 2.5rem; font-weight: 800; margin: 1rem 0; }
.price span { font-size: 1rem; font-weight: 500; color: var(--bp-muted); }

/* Animations */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* Utilities */
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.mt-4 { margin-top: 2rem; }
.gap-sm { gap: 1rem; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.badge {
  display: inline-block;
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 999px;
  background: rgba(20,184,166,0.1);
  color: var(--bp-accent-hover);
}

/* Responsive */
@media (max-width: 1024px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__visual { order: -1; }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .stats__grid { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .nav, .header__actions .btn--secondary { display: none; }
  .menu-toggle { display: flex; }
  .nav.is-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: var(--bp-header-h);
    left: 0; right: 0; bottom: 0;
    background: var(--bp-white);
    padding: 1.5rem;
    overflow-y: auto;
    z-index: 999;
  }
  .nav.is-open .nav__dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    padding-left: 1rem;
    display: none;
  }
  .nav.is-open .nav__item.is-expanded .nav__dropdown { display: block; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .section { padding: 3.5rem 0; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}