:root {
  --color-bg: #0b1120;
  --color-bg-elevated: #111827;
  --color-surface: #1e293b;
  --color-primary: #0ea5e9;
  --color-primary-dark: #0284c7;
  --color-secondary: #6366f1;
  --color-accent: #22d3ee;
  --color-text: #f8fafc;
  --color-text-muted: #94a3b8;
  --color-border: rgba(148, 163, 184, 0.15);
  --shadow: 0 24px 60px rgba(2, 8, 23, 0.5);
  --radius: 16px;
  --radius-sm: 10px;
  --container: 1180px;
  --header-height: 72px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

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

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

.container {
  width: min(92%, var(--container));
  margin-inline: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
}

.btn:hover { transform: translateY(-2px); }

.btn--primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  box-shadow: 0 8px 24px rgba(14, 165, 233, 0.25);
}

.btn--primary:hover { box-shadow: 0 12px 32px rgba(14, 165, 233, 0.35); }

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

.btn--secondary:hover { background: rgba(255,255,255,0.04); }

.btn--small { padding: 0.55rem 1rem; font-size: 0.85rem; }

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(11, 17, 32, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 800;
  font-size: 1.3rem;
  color: var(--color-text);
}

.logo__mark { width: 34px; height: 34px; color: var(--color-primary); }

.logo--light .logo__mark { color: var(--color-text); }

.nav__menu {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav__menu a:not(.btn) {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 0.92rem;
  transition: color 0.15s;
}

.nav__menu a:not(.btn):hover { color: var(--color-text); }

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: 0;
  cursor: pointer;
  padding: 0.4rem;
}

.nav__toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

.hero {
  position: relative;
  padding: 6rem 0 7rem;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: -40% -20% auto;
  height: 80%;
  background: radial-gradient(ellipse at center, rgba(14, 165, 233, 0.12), transparent 60%);
  pointer-events: none;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
}

.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  line-height: 1.1;
  font-weight: 800;
  margin: 0 0 1.25rem;
}

.hero__lead {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 520px;
  margin: 0 0 2rem;
}

.hero__actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 3rem; }

.hero__stats { display: flex; gap: 2.5rem; flex-wrap: wrap; }

.stat { display: flex; flex-direction: column; }

.stat strong { font-size: 1.8rem; font-weight: 800; color: var(--color-text); line-height: 1; }

.stat span { font-size: 0.85rem; color: var(--color-text-muted); }

.hero__visual { position: relative; }

.hero__card--main svg { width: 100%; height: auto; border-radius: var(--radius); box-shadow: var(--shadow); }

.floating-tag {
  position: absolute;
  left: var(--x);
  top: var(--y);
  background: rgba(30, 41, 59, 0.92);
  border: 1px solid var(--color-border);
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-text);
  box-shadow: 0 8px 24px rgba(2,8,23,0.4);
  white-space: nowrap;
}

.section { padding: 5.5rem 0; }

.section__header { text-align: center; margin-bottom: 3rem; }

.section__header h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  font-weight: 800;
  margin: 0 0 0.5rem;
}

.section__header p { color: var(--color-text-muted); margin: 0; }

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-bottom: 3.5rem;
}

.about__visual svg { width: 100%; height: auto; border-radius: var(--radius); box-shadow: var(--shadow); }

.about__copy p { color: var(--color-text-muted); margin: 0 0 1.25rem; }

.feature-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.feature-card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: transform 0.15s, border-color 0.15s;
}

.feature-card:hover { transform: translateY(-4px); border-color: rgba(14, 165, 233, 0.35); }

.feature-card__num {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.feature-card h3 { margin: 0 0 0.5rem; font-size: 1.15rem; }

.feature-card p { margin: 0; color: var(--color-text-muted); font-size: 0.95rem; }

.values { background: linear-gradient(180deg, transparent, rgba(14, 165, 233, 0.04), transparent); }

.values__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.value-item {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1.25rem 1.5rem;
  text-align: center;
}

.value-item h3 { margin: 0; font-size: 1rem; font-weight: 600; }

.value-item--wide { grid-column: 1 / -1; }

.principles__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.principle-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.principle-card h3 { margin: 0 0 0.5rem; font-size: 1.1rem; }

.principle-card p { margin: 0; color: var(--color-text-muted); font-size: 0.95rem; }

.references { background: var(--color-bg-elevated); }

.references__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.reference-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  text-align: center;
}

.reference-card h3 { margin: 0 0 0.5rem; font-size: 1.25rem; }

.reference-card p { margin: 0; color: var(--color-text-muted); font-size: 0.92rem; }

.faq__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  max-width: 780px;
  margin-inline: auto;
}

.faq__item {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq__item summary {
  padding: 1.25rem 1.5rem;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.faq__item summary::-webkit-details-marker { display: none; }

.faq__item summary::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--color-primary);
}

.faq__item[open] summary::after { content: '−'; }

.faq__body { padding: 0 1.5rem 1.5rem; color: var(--color-text-muted); }

.faq__body p { margin: 0 0 1rem; }

.faq__body address { font-style: normal; }

.page-hero {
  padding: 5rem 0 3rem;
  text-align: center;
  position: relative;
}

.page-hero h1 {
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 800;
  margin: 0 0 1rem;
}

.page-hero__lead {
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto;
  font-size: 1.1rem;
}

.apps__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.app-card {
  position: relative;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: transform 0.15s, border-color 0.15s;
}

.app-card:hover { transform: translateY(-4px); border-color: rgba(14, 165, 233, 0.35); }

.app-card__icon { width: 56px; height: 56px; margin-bottom: 1rem; }

.app-card__icon svg { width: 100%; height: 100%; border-radius: 14px; }

.app-card__badge {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: rgba(14, 165, 233, 0.12);
  color: var(--color-primary);
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
}

.app-card h3 { margin: 0 0 0.5rem; font-size: 1.15rem; }

.app-card__desc { margin: 0 0 1rem; color: var(--color-text-muted); font-size: 0.94rem; }

.app-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.app-card__tags span {
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: 0.72rem;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
}

.app-card__features {
  margin: 0 0 1.25rem;
  padding-left: 1.1rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.app-card__features li { margin-bottom: 0.25rem; }

.app-card__links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.link-store {
  display: inline-flex;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.link-store svg { width: 18px; height: 18px; }

.footer {
  background: var(--color-bg-elevated);
  border-top: 1px solid var(--color-border);
  padding: 4rem 0 1.5rem;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer__brand p { color: var(--color-text-muted); max-width: 280px; margin: 1rem 0 0; }

.footer__links h3, .footer__contact h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 0 0 1rem;
}

.footer__links ul, .footer__contact ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.footer__links a, .footer__contact a { color: var(--color-text-muted); transition: color 0.15s; }

.footer__links a:hover, .footer__contact a:hover { color: var(--color-text); }

.footer__contact li { color: var(--color-text-muted); font-size: 0.95rem; }

.footer__bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 1.5rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

@media (max-width: 980px) {
  .hero__grid,
  .about__grid { grid-template-columns: 1fr; gap: 3rem; }

  .feature-cards,
  .principles__grid,
  .references__grid,
  .apps__grid { grid-template-columns: repeat(2, 1fr); }

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

@media (max-width: 680px) {
  :root { --header-height: 64px; }

  .nav__toggle { display: flex; }

  .nav__menu {
    position: fixed;
    inset: var(--header-height) 0 auto;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.25s, opacity 0.2s;
  }

  .nav__menu.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }

  .nav__menu li { border-bottom: 1px solid var(--color-border); }

  .nav__menu a {
    display: block;
    padding: 0.9rem 0.5rem;
    font-size: 1rem;
  }

  .nav__menu .btn { margin: 0.75rem 0.5rem; }

  .hero { padding: 3.5rem 0 4rem; }

  .hero__actions { flex-direction: column; }

  .hero__stats { gap: 1.5rem; }

  .feature-cards,
  .values__grid,
  .principles__grid,
  .references__grid,
  .apps__grid { grid-template-columns: 1fr; }

  .floating-tag { display: none; }

  .footer__grid { grid-template-columns: 1fr; gap: 2rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .feature-card, .app-card, .value-item, .principle-card, .reference-card { transition: none; }
}