:root {
  --color-bg: #0a0a0f;
  --color-bg-alt: #12121a;
  --color-surface: #1a1a26;
  --color-border: #2a2a3a;
  --color-text: #e8e8ed;
  --color-text-muted: #9494a8;
  --color-accent: #7c5cff;
  --color-accent-light: #9d82ff;
  --color-accent-glow: rgba(124, 92, 255, 0.35);
  --color-gradient-start: #7c5cff;
  --color-gradient-end: #ff6b9d;
  --font-sans: "Inter", system-ui, -apple-system, sans-serif;
  --font-display: "Space Grotesk", var(--font-sans);
  --header-height: 4.5rem;
  --radius: 0.75rem;
  --radius-lg: 1.25rem;
  --transition: 0.25s ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-accent-light);
  text-decoration: none;
  transition: color var(--transition);
}

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

.container {
  width: min(100% - 2rem, 72rem);
  margin-inline: auto;
}

.section {
  padding: 6rem 0;
}

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

.section__title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.section__title--center {
  text-align: center;
}

.section__lead {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 36rem;
  margin-bottom: 2rem;
}

.section__lead--center {
  text-align: center;
  margin-inline: auto;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}

.header--scrolled {
  border-bottom-color: var(--color-border);
}

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

.nav__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.03em;
}

.nav__logo-img {
  width: 2rem;
  height: 2rem;
  object-fit: contain;
  flex-shrink: 0;
}

.nav__logo:hover {
  color: var(--color-accent-light);
}

.nav__menu {
  display: flex;
  gap: 2rem;
  list-style: none;
}

.nav__link {
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  font-weight: 500;
}

.nav__link:hover {
  color: var(--color-text);
}

.nav__link--active {
  color: var(--color-text);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

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

.btn--primary {
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
  color: #fff;
  box-shadow: 0 4px 24px var(--color-accent-glow);
}

.btn--primary:hover {
  box-shadow: 0 6px 32px var(--color-accent-glow);
  color: #fff;
}

.btn--secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

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

.btn--full {
  width: 100%;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, var(--color-accent-glow), transparent),
    radial-gradient(ellipse 50% 40% at 80% 60%, rgba(255, 107, 157, 0.12), transparent);
  pointer-events: none;
}

.hero__content {
  position: relative;
  padding-block: 4rem;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  max-width: 16ch;
  margin-bottom: 1.5rem;
}

.hero__subtitle {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  color: var(--color-text-muted);
  max-width: 42rem;
  margin-bottom: 2.5rem;
}

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

/* About */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.about__text p + p {
  margin-top: 1rem;
  color: var(--color-text-muted);
}

.about__stats {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.stat {
  padding: 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.stat__value {
  display: block;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent-light);
  margin-bottom: 0.25rem;
}

.stat__label {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

/* App showcase */
.app__grid {
  display: grid;
  grid-template-columns: minmax(240px, 320px) 1fr;
  gap: 4rem;
  align-items: center;
}

.app__visual {
  display: flex;
  justify-content: center;
}

.app__screenshot {
  width: 100%;
  max-width: 320px;
  height: auto;
  border-radius: 2rem;
  border: 1px solid var(--color-border);
  box-shadow:
    0 24px 48px rgba(0, 0, 0, 0.45),
    0 0 0 1px rgba(255, 255, 255, 0.04);
}

.app__cta {
  margin-top: 2.5rem;
  padding: 1.75rem;
  background: linear-gradient(
    135deg,
    rgba(124, 92, 255, 0.12),
    rgba(255, 107, 157, 0.08)
  );
  border: 1px solid rgba(124, 92, 255, 0.35);
  border-radius: var(--radius-lg);
  box-shadow: 0 12px 40px rgba(124, 92, 255, 0.15);
}

.app__cta-label {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent-light);
  margin-bottom: 1rem;
}

.app__cta-btn {
  display: inline-flex;
  width: 100%;
  max-width: 22rem;
  padding: 1.125rem 2rem;
  font-size: 1.0625rem;
  font-weight: 700;
  border-radius: 999px;
  box-shadow:
    0 8px 32px var(--color-accent-glow),
    0 0 0 1px rgba(255, 255, 255, 0.08) inset;
}

.app__cta-btn:hover {
  transform: translateY(-2px);
  box-shadow:
    0 12px 40px rgba(124, 92, 255, 0.5),
    0 0 0 1px rgba(255, 255, 255, 0.12) inset;
}

.app__cta-note {
  margin-top: 1rem;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  max-width: 22rem;
}

.app__text .section__lead {
  margin-bottom: 1.5rem;
}

.app__features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.app__features li {
  position: relative;
  padding-left: 1.5rem;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
}

.app__features li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-gradient-start), var(--color-gradient-end));
}

/* Services */
.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.service-card {
  padding: 2rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition), transform var(--transition);
}

.service-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
}

.service-card__icon {
  width: 2.5rem;
  height: 2.5rem;
  color: var(--color-accent-light);
  margin-bottom: 1.25rem;
}

.service-card__icon svg {
  width: 100%;
  height: 100%;
}

.service-card__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

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

/* Contact */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}

.contact__details {
  list-style: none;
  margin-top: 2rem;
}

.contact__details li + li {
  margin-top: 1.25rem;
}

.contact__label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.contact__form {
  padding: 2rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.form-group + .form-group {
  margin-top: 1.25rem;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 6rem;
}

.form-status {
  margin-top: 1rem;
  font-size: 0.875rem;
  text-align: center;
  min-height: 1.25rem;
}

.form-status--success {
  color: #4ade80;
}

.form-status--error {
  color: #f87171;
}

/* Legal page */
.legal-page {
  padding-top: calc(var(--header-height) + 3rem);
  padding-bottom: 4rem;
}

.legal-content {
  max-width: 42rem;
}

.legal-content__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.legal-content__updated {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: 2.5rem;
}

.legal-content h2 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
}

.legal-content p {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.legal-content ul {
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.legal-content li + li {
  margin-top: 0.5rem;
}

/* Footer */
.footer {
  padding: 3rem 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-alt);
}

.footer__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 2rem 4rem;
}

.footer__logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}

.footer__logo-img {
  width: 1.75rem;
  height: 1.75rem;
  object-fit: contain;
  flex-shrink: 0;
}

.footer__tagline {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

.footer__links {
  display: flex;
  gap: 1.5rem;
  align-items: start;
}

.footer__links a {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

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

.footer__copy {
  grid-column: 1 / -1;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

/* Responsive */
@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 0;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  }

  .nav__menu--open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav__menu li {
    padding: 0.75rem 1rem;
  }

  .about__grid,
  .contact__grid,
  .app__grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .app__visual {
    order: -1;
  }

  .app__screenshot {
    max-width: 280px;
  }

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

  .footer__inner {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .footer__links {
    flex-wrap: wrap;
  }
}