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

:root {
  --bg: #08080f;
  --bg-alt: #0e0e18;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.08);
  --text: #ebebeb;
  --text-muted: rgba(235, 235, 235, 0.6);
  --accent: #352693;
  --accent-light: #5b3fd4;
  --accent-glow: rgba(53, 38, 147, 0.45);
  --success: #34d399;
  --radius: 16px;
  --radius-sm: 10px;
  --header-h: 72px;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 24px);
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  width: min(1140px, calc(100% - 48px));
  margin-inline: auto;
}

/* Background glow */
.bg-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background:
    radial-gradient(ellipse 60% 50% at 70% 10%, var(--accent-glow), transparent),
    radial-gradient(ellipse 40% 40% at 10% 80%, rgba(43, 87, 151, 0.2), transparent);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(8, 8, 15, 0.75);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.header__inner {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 32px;
}

.logo img {
  height: 32px;
  width: auto;
}

.nav {
  display: flex;
  gap: 28px;
  margin-left: auto;
}

.nav a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

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

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

.mobile-nav {
  position: fixed;
  top: var(--header-h);
  left: 0;
  right: 0;
  z-index: 99;
  background: rgba(8, 8, 15, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.mobile-nav[hidden] {
  display: none;
}

.mobile-nav a {
  font-size: 1rem;
  color: var(--text-muted);
  padding: 8px 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

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

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

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

.btn--ghost:hover {
  background: var(--surface-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

.btn--sm {
  padding: 10px 20px;
  font-size: 0.85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
}

.btn--sm:hover {
  background: var(--surface-hover);
}

.btn--full {
  width: 100%;
  margin-top: 8px;
}

/* Hero */
.hero {
  padding: calc(var(--header-h) + 64px) 0 100px;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.badge__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero__title {
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.gradient-text {
  background: linear-gradient(135deg, #a78bfa, #6366f1, var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 480px;
  margin-bottom: 32px;
}

.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero__stats {
  display: flex;
  gap: 40px;
}

.stat__value {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
}

.stat__label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Hero visual */
.hero__visual {
  position: relative;
  height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.screen-card {
  position: absolute;
  width: 280px;
  border-radius: 12px;
  background: #12121c;
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5);
}

.screen-card--back {
  transform: rotate(-6deg) translate(-40px, -20px);
  opacity: 0.5;
}

.screen-card--front {
  transform: rotate(3deg);
  z-index: 2;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: rotate(3deg) translateY(0); }
  50% { transform: rotate(3deg) translateY(-12px); }
}

.screen-card__bar {
  display: flex;
  gap: 6px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid var(--border);
}

.screen-card__bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
}

.screen-card__bar span:first-child { background: #ff5f57; }
.screen-card__bar span:nth-child(2) { background: #febc2e; }
.screen-card__bar span:nth-child(3) { background: #28c840; }

.screen-card__body {
  padding: 24px;
  min-height: 180px;
}

.code-line {
  height: 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.08);
  margin-bottom: 12px;
}

.code-line--short { width: 60%; }
.code-line--medium { width: 80%; }

.screen-card__body--remote {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  background: linear-gradient(180deg, #12121c, #1a1230);
}

.remote-cursor {
  color: var(--accent-light);
  animation: cursor-move 4s ease-in-out infinite;
}

@keyframes cursor-move {
  0%, 100% { transform: translate(20px, -10px); }
  50% { transform: translate(-10px, 15px); }
}

.remote-id {
  text-align: center;
}

.remote-id__label {
  display: block;
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.remote-id__value {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  font-variant-numeric: tabular-nums;
}

.remote-status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--success);
}

.remote-status__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse 2s ease-in-out infinite;
}

.connection-ring {
  position: absolute;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  border: 1px solid rgba(53, 38, 147, 0.3);
  animation: ring-pulse 4s ease-in-out infinite;
}

@keyframes ring-pulse {
  0%, 100% { transform: scale(1); opacity: 0.3; }
  50% { transform: scale(1.05); opacity: 0.6; }
}

/* Sections */
.section {
  padding: 100px 0;
}

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

.section__head {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 56px;
}

.section__title {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section__subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* Features */
.features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.feature-card {
  padding: 28px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.feature-card:hover {
  background: var(--surface-hover);
  border-color: rgba(53, 38, 147, 0.3);
  transform: translateY(-4px);
}

.feature-card__icon {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: rgba(53, 38, 147, 0.2);
  color: #a78bfa;
  margin-bottom: 16px;
}

.feature-card__icon svg {
  width: 22px;
  height: 22px;
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* Scheme */
.scheme {
  display: flex;
  align-items: stretch;
  gap: 16px;
}

.scheme__item {
  flex: 1;
  padding: 28px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  text-align: center;
}

.scheme__item--accent {
  background: rgba(53, 38, 147, 0.12);
  border-color: rgba(53, 38, 147, 0.3);
}

.scheme__icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(53, 38, 147, 0.2);
  color: #a78bfa;
}

.scheme__icon svg {
  width: 26px;
  height: 26px;
}

.scheme__item h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.scheme__item p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.scheme__arrow {
  display: flex;
  align-items: center;
  color: var(--text-muted);
  opacity: 0.4;
  flex-shrink: 0;
}

.scheme__arrow svg {
  width: 24px;
  height: 24px;
}

/* Steps */
.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  counter-reset: none;
}

.step {
  position: relative;
  padding: 32px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
}

.step__num {
  display: block;
  font-size: 2.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
  line-height: 1;
}

.step h3 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.step p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Downloads */
.downloads {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.download-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.download-card:hover {
  background: var(--surface-hover);
  border-color: rgba(53, 38, 147, 0.35);
  transform: translateY(-2px);
}

.download-card__icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  color: var(--text-muted);
}

.download-card strong {
  display: block;
  font-size: 0.95rem;
}

.download-card span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.download-card__arrow {
  width: 18px;
  height: 18px;
  margin-left: auto;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: var(--transition);
}

.download-card:hover .download-card__arrow {
  color: var(--accent-light);
  transform: translate(2px, -2px);
}

.download-card--static {
  cursor: default;
  opacity: 0.7;
}

.download-card--static:hover {
  transform: none;
  border-color: var(--border);
  background: var(--surface);
}

.download-card--static:hover .download-card__arrow {
  transform: none;
  color: var(--text-muted);
}

/* Config */
.config-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 32px;
  align-items: start;
}

.config-panel {
  padding: 32px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
}

.config-field {
  margin-bottom: 20px;
}

.config-field label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.config-field__row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border);
}

.config-field__row code {
  flex: 1;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.85rem;
  word-break: break-all;
  color: #c4b5fd;
}

.config-field__key {
  font-size: 0.75rem !important;
}

.copy-btn {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 8px;
  background: var(--surface-hover);
  color: var(--text-muted);
  cursor: pointer;
  transition: var(--transition);
}

.copy-btn:hover:not(:disabled) {
  background: rgba(53, 38, 147, 0.3);
  color: #fff;
}

.copy-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.copy-btn svg {
  width: 16px;
  height: 16px;
}

.config-help {
  padding: 32px;
}

.config-help h3 {
  font-size: 1rem;
  margin-bottom: 12px;
  margin-top: 24px;
}

.config-help h3:first-child {
  margin-top: 0;
}

.config-help ol {
  padding-left: 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.config-help ol li {
  margin-bottom: 8px;
}

.config-help p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.config-note {
  display: flex;
  gap: 12px;
  margin-top: 24px;
  padding: 16px;
  border-radius: var(--radius-sm);
  background: rgba(53, 38, 147, 0.1);
  border: 1px solid rgba(53, 38, 147, 0.2);
}

.config-note svg {
  flex-shrink: 0;
  color: #a78bfa;
  margin-top: 2px;
}

.config-note p {
  font-size: 0.85rem;
}

.config-note code {
  font-size: 0.8rem;
  color: #c4b5fd;
}

/* Support */
.support-card {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
  padding: 56px;
  border-radius: calc(var(--radius) + 8px);
  background: linear-gradient(135deg, rgba(53, 38, 147, 0.15), rgba(43, 87, 151, 0.1));
  border: 1px solid rgba(53, 38, 147, 0.25);
}

.support-card h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 12px;
}

.support-card p {
  color: var(--text-muted);
  margin-bottom: 28px;
  max-width: 440px;
}

.support-card__contacts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 0.9rem;
  transition: var(--transition);
}

.contact-link:hover {
  background: var(--surface-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

.contact-link svg {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
}

.support-card__visual {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 200px;
}

.support-orbit {
  position: relative;
  width: 160px;
  height: 160px;
}

.support-orbit__ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 2px solid rgba(53, 38, 147, 0.4);
  animation: orbit-spin 8s linear infinite;
}

.support-orbit__dot {
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-light);
  box-shadow: 0 0 20px var(--accent-glow);
}

@keyframes orbit-spin {
  to { transform: rotate(360deg); }
}

/* Footer */
.footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer a {
  color: var(--text-muted);
  transition: color var(--transition);
}

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

/* Toast */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  padding: 12px 24px;
  border-radius: 999px;
  background: #1a1a28;
  border: 1px solid var(--border);
  font-size: 0.9rem;
  opacity: 0;
  transition: var(--transition);
  z-index: 200;
  pointer-events: none;
}

.toast--visible {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

/* Responsive */
.steps--four {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
  .scheme {
    flex-direction: column;
  }

  .scheme__arrow {
    justify-content: center;
    transform: rotate(90deg);
  }

  .steps--four {
    grid-template-columns: repeat(2, 1fr);
  }

  .features {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero__grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero__visual {
    height: 320px;
  }

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

  .support-card {
    grid-template-columns: 1fr;
    padding: 40px;
  }

  .support-card__visual {
    display: none;
  }
}

@media (max-width: 768px) {
  .nav,
  .header .btn--sm {
    display: none;
  }

  .menu-toggle {
    display: flex;
    margin-left: auto;
  }

  .steps,
  .steps--four {
    grid-template-columns: 1fr;
  }

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

  .download-card--all {
    grid-column: span 1;
  }

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

  .hero__stats {
    gap: 24px;
  }

  .footer__inner {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    width: calc(100% - 32px);
  }

  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .btn {
    width: 100%;
  }
}