:root {
  --navy-950: #0b1220;
  --navy-900: #0f172a;
  --navy-800: #162235;
  --slate-200: #e2e8f0;
  --slate-300: #cbd5f5;
  --slate-400: #9aa4b2;
  --accent: #38bdf8;
  --accent-strong: #0ea5e9;
  --success: #22c55e;
  --danger: #ef4444;
  --card: #131d2c;
  --card-border: rgba(148, 163, 184, 0.2);
  --shadow: rgba(15, 23, 42, 0.35);
}

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

body {
  font-family: "Manrope", sans-serif;
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(56, 189, 248, 0.2), transparent 60%),
    radial-gradient(900px 500px at 10% 110%, rgba(59, 130, 246, 0.18), transparent 55%),
    var(--navy-950);
  color: var(--slate-200);
  min-height: 100vh;
  overflow-x: hidden;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 120px 24px 80px;
}

h1, h2, h3 {
  font-family: "Space Grotesk", sans-serif;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 3.8rem);
  line-height: 1.1;
}

h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
}

p {
  color: var(--slate-300);
  line-height: 1.7;
}

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

.orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(0);
  opacity: 0.6;
  z-index: 0;
  pointer-events: none;
  animation: float 18s ease-in-out infinite;
}

.orb--one {
  width: 420px;
  height: 420px;
  background: rgba(56, 189, 248, 0.14);
  top: -160px;
  right: -120px;
}

.orb--two {
  width: 320px;
  height: 320px;
  background: rgba(37, 99, 235, 0.2);
  bottom: 10%;
  left: -120px;
  animation-delay: 2s;
}

.orb--three {
  width: 240px;
  height: 240px;
  background: rgba(15, 23, 42, 0.8);
  top: 35%;
  right: 8%;
  animation-delay: 5s;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 20px 32px;
  background: rgba(11, 18, 32, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.15);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand__mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), #60a5fa);
  border-radius: 12px;
  font-weight: 700;
}

.brand__title {
  font-weight: 700;
  font-size: 1.05rem;
}

.brand__subtitle {
  font-size: 0.8rem;
  color: var(--slate-400);
}

.topnav {
  display: flex;
  gap: 16px;
  font-size: 0.95rem;
  color: var(--slate-300);
}

.topnav a {
  padding: 6px 12px;
  border-radius: 999px;
  transition: all 0.2s ease;
}

.topnav a:hover {
  background: rgba(56, 189, 248, 0.12);
  color: var(--slate-200);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #04101f;
  box-shadow: 0 10px 20px -15px var(--accent);
}

.btn--primary:hover {
  filter: brightness(1.05);
}

.btn--ghost {
  border-color: rgba(148, 163, 184, 0.3);
  color: var(--slate-200);
  background: rgba(15, 23, 42, 0.6);
}

.btn--ghost:hover {
  border-color: rgba(56, 189, 248, 0.5);
  color: var(--slate-200);
}

.hero {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 48px;
  align-items: center;
  margin-bottom: 120px;
  position: relative;
  z-index: 1;
}

.hero__content p {
  margin-top: 18px;
  max-width: 560px;
}

.hero__actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero__stats {
  margin-top: 32px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}

.stat {
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(19, 29, 44, 0.8);
  border: 1px solid rgba(148, 163, 184, 0.15);
  display: grid;
  gap: 6px;
}

.stat span {
  font-size: 0.85rem;
  color: var(--slate-400);
}

.stat strong {
  font-size: 1.05rem;
}

.pill {
  display: inline-flex;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(56, 189, 248, 0.12);
  color: var(--slate-300);
  font-size: 0.8rem;
}

.hero__panel {
  background: var(--card);
  border-radius: 20px;
  padding: 18px;
  border: 1px solid var(--card-border);
  box-shadow: 0 30px 50px -40px var(--shadow);
}

.panel__header {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  color: var(--slate-400);
}

.panel__dots span {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: rgba(148, 163, 184, 0.4);
  border-radius: 50%;
  margin-left: 6px;
}

.panel__body {
  margin-top: 18px;
  display: grid;
  gap: 14px;
}

.panel__row {
  display: flex;
  justify-content: space-between;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(15, 23, 42, 0.6);
}

.panel__cta {
  text-align: center;
  padding: 12px;
  border-radius: 12px;
  background: rgba(56, 189, 248, 0.12);
}

.price--down {
  color: var(--success);
}

.price--up {
  color: var(--danger);
}

.price--stable {
  color: var(--slate-400);
}

.section-title {
  display: grid;
  gap: 12px;
  margin-bottom: 32px;
}

.features__grid,
.download__grid,
.faq__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.features__grid article,
.download__card,
.register__form,
.register__info {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 30px 50px -40px var(--shadow);
}

.features__grid h3 {
  margin-bottom: 10px;
}

.register {
  margin: 120px 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
}

.register__info ol {
  margin-top: 16px;
  padding-left: 18px;
  color: var(--slate-300);
  display: grid;
  gap: 10px;
}

.register__form label {
  display: grid;
  gap: 6px;
  font-size: 0.9rem;
  margin-bottom: 14px;
}

.register__form input {
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  background: rgba(15, 23, 42, 0.6);
  color: var(--slate-200);
}

.register__form button + button {
  margin-top: 12px;
}

.form__message {
  margin-top: 12px;
  min-height: 22px;
  font-size: 0.9rem;
  color: var(--slate-300);
}

.form__message--success {
  color: var(--success);
}

.form__message--error {
  color: var(--danger);
}

.form__message--warning {
  color: #fbbf24;
}

.form__message--info {
  color: var(--slate-300);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.note {
  margin-top: 18px;
  font-size: 0.85rem;
  color: var(--slate-400);
  border-left: 2px solid rgba(56, 189, 248, 0.4);
  padding-left: 12px;
}

.download__card p {
  margin: 10px 0 18px;
}

.faq__grid details {
  background: rgba(19, 29, 44, 0.8);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 16px 18px;
}

details summary {
  cursor: pointer;
  font-weight: 600;
  margin-bottom: 10px;
}

.footer {
  margin-top: 120px;
  padding: 32px 24px 48px;
  border-top: 1px solid rgba(148, 163, 184, 0.15);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: space-between;
  color: var(--slate-400);
}

.footer strong {
  color: var(--slate-200);
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-18px); }
}

@media (max-width: 920px) {
  .topbar {
    flex-wrap: wrap;
  }

  .topnav {
    width: 100%;
    justify-content: space-between;
  }
}

@media (max-width: 640px) {
  .topnav {
    display: none;
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .orb {
    animation: none;
  }
}