:root {
  --bg: #02030a;
  --bg-elevated: #050812;
  --accent: #00fff5;
  --accent-soft: rgba(0, 255, 245, 0.12);
  --text-main: #f5f7fa;
  --text-muted: #9197ac;
  --border-subtle: rgba(255, 255, 255, 0.06);
  --radius-lg: 24px;
  --radius-md: 16px;
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.85);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(0, 255, 245, 0.22), transparent 55%),
    radial-gradient(circle at bottom right, rgba(0, 255, 245, 0.18), transparent 60%),
    #000000;
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  text-decoration: underline;
}

.page-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* Top navigation */

.top-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.96),
    rgba(0, 0, 0, 0.86)
  );
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  transition: box-shadow 0.2s ease, background 0.2s ease;
}

.top-nav--scrolled {
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.9);
  background: rgba(0, 0, 0, 0.96);
}

.nav-inner {
  max-width: 1040px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand img {
  width: 28px;
  height: 28px;
  border-radius: 20px;
  padding: 4px;
  background: radial-gradient(circle at 30% 0, #ffffff, var(--accent));
  box-shadow: 0 0 18px rgba(0, 255, 245, 0.9);
}

.brand-text {
  font-size: 0.92rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.9rem;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  position: relative;
  padding-bottom: 2px;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  border-radius: 999px;
  background: var(--accent);
  transition: width 0.16s ease;
}

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

.nav-links a:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  position: relative;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(0, 0, 0, 0.8);
  padding: 0;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.nav-toggle span {
  position: absolute;
  width: 16px;
  height: 2px;
  border-radius: 999px;
  background: #ffffff;
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.nav-toggle span:first-child {
  transform: translateY(-3px);
}

.nav-toggle span:last-child {
  transform: translateY(3px);
}

.nav-toggle--open span:first-child {
  transform: rotate(45deg);
}

.nav-toggle--open span:last-child {
  transform: rotate(-45deg);
}

@media (max-width: 720px) {
  .nav-links {
    position: absolute;
    top: 54px;
    right: 20px;
    display: none;
    flex-direction: column;
    align-items: flex-end;
    gap: 10px;
    padding: 10px 12px;
    background: rgba(0, 0, 0, 0.98);
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    box-shadow: var(--shadow-soft);
  }

  .nav-links.nav-links--open {
    display: flex;
  }

  .nav-toggle {
    display: inline-flex;
  }
}

@media (min-width: 721px) {
  .nav-links {
    display: flex;
  }
}

/* Hero section */

.hero {
  padding: 56px 20px 32px;
  position: relative;
}

.hero::before {
  content: "";
  position: fixed;
  top: -160px;
  right: -120px;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(0, 255, 245, 0.25), transparent 60%);
  opacity: 0.9;
  filter: blur(2px);
  z-index: -1;
}

.hero-content {
  max-width: 1040px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.7);
  border: 1px solid rgba(0, 255, 245, 0.4);
  color: var(--accent);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.badge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 15px rgba(0, 255, 245, 0.9);
}

.hero h1 {
  margin: 14px 0 6px;
  font-size: clamp(2.15rem, 5vw, 2.9rem);
  letter-spacing: 0.04em;
}

.tagline {
  margin: 0 0 6px;
  font-size: 1.05rem;
  color: var(--accent);
  font-weight: 500;
}

.intro-text {
  margin: 0;
  max-width: 640px;
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.65;
}

.hero-grid {
  margin-top: 12px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.hero-card {
  background: linear-gradient(
    135deg,
    rgba(0, 255, 245, 0.09),
    rgba(0, 0, 0, 0.95)
  );
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  padding: 16px 16px 18px;
  box-shadow: var(--shadow-soft);
}

.hero-card h2 {
  margin: 0 0 6px;
  font-size: 1.02rem;
}

.hero-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
}

@media (min-width: 800px) {
  .hero-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* Privacy section */

.privacy {
  padding: 40px 20px 32px;
}

.section-heading {
  max-width: 1040px;
  margin: 0 auto 16px;
}

.section-heading h2 {
  margin: 0 0 4px;
  font-size: 1.4rem;
}

.section-heading p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.policy-text {
  max-width: 1040px;
  margin: 0 auto;
  background: linear-gradient(
    135deg,
    rgba(0, 255, 245, 0.08),
    rgba(0, 0, 0, 0.96)
  );
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  padding: 26px 22px 28px;
  box-shadow: var(--shadow-soft);
  font-size: 0.95rem;
  line-height: 1.7;
}

.policy-text h3 {
  margin: 1.6rem 0 0.4rem;
  font-size: 1.02rem;
}

.policy-text h4 {
  margin: 1.2rem 0 0.3rem;
  font-size: 0.98rem;
}

.policy-text p {
  margin: 0 0 0.6rem;
  color: var(--text-main);
}

.policy-text ul {
  margin: 0 0 0.8rem 1.1rem;
  padding: 0;
  color: var(--text-main);
}

.policy-text li {
  margin-bottom: 0.35rem;
}

.policy-text strong {
  font-weight: 600;
}

/* Contact section */

.contact {
  padding: 40px 20px 56px;
}

.contact-inner {
  max-width: 720px;
  margin: 0 auto;
  background: radial-gradient(
    circle at top right,
    rgba(0, 255, 245, 0.15),
    rgba(0, 0, 0, 0.96)
  );
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  padding: 26px 22px 28px;
  box-shadow: var(--shadow-soft);
}

.support-form {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-top: 10px;
}

.field span {
  display: block;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 6px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

textarea,
input[type="text"],
input[type="email"] {
  width: 100%;
  padding: 10px 11px;
  border-radius: 12px;
  border: 1px solid var(--border-subtle);
  background: rgba(0, 0, 0, 0.7);
  color: var(--text-main);
  font-size: 0.95rem;
  outline: none;
  resize: vertical;
}

textarea:focus,
input[type="text"]:focus,
input[type="email"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(0, 255, 245, 0.38);
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

@media (min-width: 720px) {
  .form-row {
    flex-direction: row;
  }
}

.button-primary {
  margin-top: 4px;
  align-self: flex-start;
  border: none;
  border-radius: 999px;
  padding: 10px 22px;
  background: linear-gradient(135deg, var(--accent), #4dfff5);
  color: #000000;
  font-weight: 600;
  letter-spacing: 0.08em;
  font-size: 0.82rem;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: 0 12px 30px rgba(0, 255, 245, 0.45);
  transition:
    transform 0.15s ease,
    box-shadow 0.15s ease,
    filter 0.15s ease;
}

.button-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 18px 40px rgba(0, 255, 245, 0.6);
  filter: brightness(1.05);
}

.button-primary:active {
  transform: translateY(0);
  box-shadow: 0 8px 20px rgba(0, 255, 245, 0.35);
}

.support-note {
  margin-top: 14px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Footer */

.site-footer {
  padding: 18px 20px 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.82rem;
  color: var(--text-muted);
  text-align: center;
}

.site-footer a {
  color: var(--accent);
}