:root {
  color-scheme: dark;
  --bg-color: #000;
  --text-color: #fff;
  --muted-color: #b7bcc4;
  --line-color: #1f2125;
  --panel-bg: #0c0d11;
  --mobile-menu-bg: #161920;
  --panel-border: #252830;
  --accent: #f2f2f2;
  --link-color: #ffffff;
  --toggle-bg: #151515;
  --toggle-border: #3a3a3a;
  --install-hover-bg: #ffffff;
  --install-hover-text: #000000;
  --receipt-bg: #111319;
  --receipt-text: #e8edf6;
  --receipt-muted: #aeb8ca;
  --receipt-border: #394154;
  --receipt-divider: #2f3543;
  --receipt-shadow: 0 6px 16px rgba(0, 0, 0, 0.35);
  --code-bg-pattern: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 180 120'%3E%3Ctext x='18' y='76' font-family='Courier%20New,monospace' font-size='34' font-weight='700' fill='%23d4d9e1' fill-opacity='0.5'%3E%26lt;/%26gt;%3C/text%3E%3C/svg%3E");
  --code-bg-opacity: 0.46;
}

[data-theme="light"] {
  color-scheme: light;
  --bg-color: #f4f4f4;
  --text-color: #121212;
  --muted-color: #4e5561;
  --line-color: #d7dbe3;
  --panel-bg: #ffffff;
  --mobile-menu-bg: #ffffff;
  --panel-border: #cfcfcf;
  --accent: #101010;
  --link-color: #0f3c8a;
  --toggle-bg: #ffffff;
  --toggle-border: #cfcfcf;
  --install-hover-bg: #000000;
  --install-hover-text: #ffffff;
  --receipt-bg: #ffffff;
  --receipt-text: #121212;
  --receipt-muted: #4e5561;
  --receipt-border: #cfcfcf;
  --receipt-divider: #d7dbe3;
  --receipt-shadow: 0 6px 16px rgba(20, 24, 34, 0.12);
  --code-bg-opacity: 0.54;
}

/* From Uiverse.io by Cksunandh */
.tariffs {
  padding-top: 96px;
}

.tariff-configurator {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
  gap: 16px;
  margin-top: 20px;
  align-items: start;
}

.tariff-config-card {
  border: 1px solid var(--line-color);
  background: var(--panel-bg);
  padding: 18px;
}

.tariff-config-title {
  margin: 0 0 8px;
  font-family: Arial, sans-serif;
  font-size: clamp(28px, 4vw, 38px);
  line-height: 1.1;
}

.tariff-config-note {
  margin: 0 0 18px;
  color: var(--muted-color);
  font-size: 16px;
  line-height: 1.45;
  max-width: 62ch;
}

.tariff-field {
  margin-bottom: 16px;
}

.tariff-field:last-child {
  margin-bottom: 0;
}

.tariff-field-label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.period-options {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}

.tariff-discount-note {
  margin: 12px 0 0;
  color: var(--muted-color);
  font-size: 14px;
}

.period-option {
  border: 1px solid var(--line-color);
  background: transparent;
  color: var(--text-color);
  font-family: inherit;
  font-size: 16px;
  padding: 11px 8px;
  cursor: pointer;
}

.period-option.is-active {
  background: var(--accent);
  color: var(--bg-color);
  border-color: var(--accent);
  font-weight: 700;
}

.devices-range-wrap {
  border: 1px solid var(--line-color);
  background: var(#0c0d11);
  padding: 10px 12px 12px;
}

.devices-range {
  width: 100%;
  accent-color: var(--accent);
  cursor: pointer;
}

.devices-range-meta {
  margin-top: 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted-color);
  font-size: 14px;
}

#devices-current {
  color: var(--text-color);
  font-size: 18px;
}

.receipt {
  width: 100%;
  background: var(--receipt-bg);
  color: var(--receipt-text);
  border: 1px dashed var(--receipt-border);
  padding: 10px 12px;
  border-radius: 8px;
  box-shadow: var(--receipt-shadow);
}

.shop-name {
  font-size: 1.18rem;
  font-weight: 700;
  text-align: center;
  margin: 0 0 4px;
}

.info {
  text-align: center;
  font-size: 0.9rem;
  line-height: 1.3;
  color: var(--receipt-muted);
  margin: 0 0 6px;
}

.receipt table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 8px;
  font-size: 0.92rem;
}

.receipt table th,
.receipt table td {
  padding: 4px 2px;
  text-align: left;
  border-bottom: 1px solid var(--receipt-divider);
}

.total {
  display: flex;
  justify-content: space-between;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0;
  gap: 12px;
}

.barcode {
  display: flex;
  justify-content: center;
  margin-top: 8px;
}

.thanks {
  font-size: 0.85rem;
  text-align: center;
  margin: 0;
  color: var(--receipt-muted);
}

.tariff-summary {
  align-self: start;
  padding: 12px 14px;
  line-height: 1.35;
}

.tariff-summary p {
  margin: 0;
}

.tariff-price-big {
  margin: 8px 0 10px;
  text-align: center;
  font-family: Arial, sans-serif;
  font-weight: 800;
  font-size: clamp(40px, 6.2vw, 58px);
  line-height: 1;
}

.tariff-breakdown {
  border-top: 1px dashed var(--receipt-divider);
  border-bottom: 1px dashed var(--receipt-divider);
  padding: 8px 0;
  margin-bottom: 8px;
}

.tariff-breakdown .total {
  margin: 0;
}

.tariff-breakdown .total + .total {
  margin-top: 6px;
}

.tariff-buy-btn {
  width: 100%;
  min-width: 0;
  margin-top: 10px;
  padding: 11px 14px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg-color);
  color: var(--text-color);
  font-family: "Courier New", Courier, monospace;
  line-height: 1.7;
  position: relative;
  isolation: isolate;
  transition:
    background-color 0.2s ease,
    color 0.2s ease;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: var(--code-bg-pattern), var(--code-bg-pattern);
  background-size:
    240px 160px,
    240px 160px;
  background-position:
    0 0,
    120px 80px;
  background-repeat: repeat, repeat;
  opacity: var(--code-bg-opacity);
  pointer-events: none;
  z-index: 0;
}

a {
  color: var(--link-color);
  text-decoration: underline;
  word-break: break-word;
}

.site-shell {
  width: min(1200px, calc(100% - 48px));
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-color);
  gap: 14px;
}

.brand {
  text-decoration: none;
  color: var(--text-color);
  font-weight: 700;
  font-size: 26px;
  letter-spacing: 0.02em;
}

.brand small {
  font-size: 15px;
  font-weight: 700;
  margin-left: 8px;
}

.topnav {
  display: flex;
  gap: 24px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-start;
  margin: 0;
}

.topnav a {
  text-decoration: none;
  color: var(--text-color);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line-color);
  background: transparent;
  color: var(--text-color);
  cursor: pointer;
  flex-shrink: 0;
}

.menu-toggle svg {
  width: 18px;
  height: 18px;
}

.menu-toggle .icon-close {
  display: none;
}

.topbar.is-open .menu-toggle .icon-burger {
  display: none;
}

.topbar.is-open .menu-toggle .icon-close {
  display: block;
}

.mobile-menu {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-left: auto;
}

.install-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: 3px;
  text-decoration: none;
  color: var(--text-color);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
  transition:
    background-color 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease;
}

.install-link:hover,
.install-link:focus-visible {
  background: var(--install-hover-bg);
  color: var(--install-hover-text);
  border-color: var(--install-hover-bg);
  outline: none;
}

.install-link:active {
  background: var(--install-hover-bg);
  color: var(--install-hover-text);
  border-color: var(--install-hover-bg);
}

.hero {
  padding: 70px 0 40px;
  text-align: center;
}

.hero-title {
  margin: 0;
  font-family: "Arial Black", Arial, sans-serif;
  font-size: clamp(44px, 10vw, 120px);
  line-height: 0.9;
  letter-spacing: -0.02em;
}

.hero-title span {
  display: block;
}

.hero-subtitle {
  margin: 22px auto 0;
  max-width: 760px;
  color: var(--muted-color);
  font-size: 21px;
}

.primary-btn {
  margin-top: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 320px;
  padding: 13px 20px;
  border: 1px solid var(--panel-border);
  background: var(--accent);
  color: var(--bg-color);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.section {
  padding: 72px 0 10px;
}

.section h2 {
  margin: 0 0 30px;
  font-family: Arial, sans-serif;
  font-size: clamp(32px, 5vw, 58px);
  line-height: 1.05;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.feature-card {
  border: 1px solid var(--line-color);
  background: var(--panel-bg);
  padding: 0;
  min-height: 210px;
  cursor: pointer;
  perspective: 1000px;
  position: relative;
}

.feature-card:hover {
  border-color: var(--accent);
}

.feature-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  transform-style: preserve-3d;
}

.feature-card:hover .feature-card-inner {
  transform: rotateY(180deg);
}

.feature-card-front,
.feature-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  padding: 22px;
  backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.feature-card-back {
  transform: rotateY(180deg);
  align-items: flex-start;
  justify-content: center;
}

.feature-icon {
  font-size: 56px;
  line-height: 1;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  height: 56px;
}

.feature-card-front h3 {
  margin: 0;
  font-family: Arial, sans-serif;
  font-size: 26px;
  line-height: 1.2;
  text-align: center;
  color: var(--text-color);
}

.feature-index {
  color: var(--muted-color);
  font-size: 13px;
  margin-bottom: 12px;
}

.feature-card h3 {
  margin: 0 0 10px;
  font-family: Arial, sans-serif;
  font-size: 30px;
  line-height: 1;
}

.feature-card p {
  margin: 0;
  color: var(--muted-color);
  font-size: 18px;
  line-height: 1.5;
}

.feature-icon svg {
  width: 56px;
  height: 56px;
  display: block;
}

.feature-icon img {
  width: 56px;
  height: 56px;
  object-fit: contain;
  display: block;
}

/* invert icons in dark mode */
[data-theme="dark"] .feature-icon img {
  filter: invert(1) brightness(1.2);
}

.steps {
  border-top: 1px solid var(--line-color);
}

.step {
  border-bottom: 1px solid var(--line-color);
  padding: 28px 0;
}

.step strong {
  display: inline-block;
  min-width: 70px;
  color: var(--muted-color);
}

.step-title {
  font-family: Arial, sans-serif;
  font-size: clamp(28px, 5vw, 48px);
  line-height: 1.08;
  margin: 0;
}

.install-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 24px;
}

.install-item {
  width: min(340px, 100%);
  border: 1px solid var(--line-color);
  padding: 16px;
  background: var(--panel-bg);
}

.install-item span {
  display: block;
  color: var(--muted-color);
  font-size: 14px;
  margin-top: 4px;
}

.videos {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.video-card {
  border: 1px solid var(--line-color);
  background: #33353b;
  min-height: 160px;
  display: grid;
  place-content: center;
  text-align: center;
  padding: 20px;
  font-family: Arial, sans-serif;
  font-size: 30px;
}

.site-footer {
  margin-top: 80px;
  border-top: 1px solid var(--line-color);
  padding: 26px 0 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  align-items: center;
  justify-content: space-between;
}

.site-footer nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.site-footer a {
  text-decoration: none;
  color: var(--text-color);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.legal {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px;
  font-size: 18px;
}

.legal h1 {
  font-size: 34px;
  margin: 0 0 32px;
}

.legal h2 {
  margin-top: 35px;
  margin-bottom: 18px;
  font-size: 26px;
}

.legal h3 {
  font-size: 20px;
  margin-top: 25px;
  margin-bottom: 12px;
}

.legal p {
  margin-bottom: 16px;
  font-size: 18px;
}

.legal ul {
  margin-left: 18px;
  margin-bottom: 18px;
  padding-left: 10px;
}

.legal li {
  margin-bottom: 8px;
  font-size: 18px;
}

.theme-toggle {
  position: fixed;
  right: 14px;
  bottom: 14px;
  top: auto;
  width: 42px;
  height: 42px;
  border: 1px solid var(--toggle-border);
  border-radius: 999px;
  background: var(--toggle-bg);
  color: var(--text-color);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 1000;
  transition:
    opacity 0.2s ease,
    visibility 0.2s ease,
    background-color 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease;
}

.theme-toggle.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

.icon-sun {
  display: none;
}

[data-theme="light"] .icon-sun {
  display: block;
}

[data-theme="light"] .icon-moon {
  display: none;
}

@keyframes menu-pop-in {
  0% {
    opacity: 0;
    transform: translateY(-12px) scale(0.94);
  }
  70% {
    opacity: 1;
    transform: translateY(2px) scale(1.01);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes menu-item-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 1100px) {
  .features {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tariff-configurator {
    grid-template-columns: 1fr;
  }

  .videos {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .tariffs {
    padding-top: 72px;
  }

  .site-shell {
    width: min(1200px, calc(100% - 26px));
  }

  .topbar {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 16px 0;
    gap: 12px;
    position: relative;
  }

  .brand {
    font-size: 22px;
  }

  .brand small {
    font-size: 13px;
    margin-left: 6px;
  }

  .menu-toggle {
    display: inline-flex;
    justify-self: end;
    transition:
      transform 0.28s cubic-bezier(0.22, 1, 0.36, 1),
      background-color 0.2s ease,
      border-color 0.2s ease,
      box-shadow 0.2s ease;
  }

  .menu-toggle:active {
    transform: scale(0.94);
  }

  .topbar.is-open .menu-toggle {
    transform: rotate(90deg);
    background: var(--panel-bg);
    border-color: var(--panel-border);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.24);
  }

  .mobile-menu {
    display: flex;
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: min(320px, calc(100vw - 26px));
    border: 1px solid var(--line-color);
    background: var(--mobile-menu-bg);
    padding: 14px;
    gap: 12px;
    z-index: 25;
    flex-direction: column;
    margin-left: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-12px) scale(0.94);
    transform-origin: top right;
    box-shadow: 0 16px 38px rgba(0, 0, 0, 0.32);
    transition:
      opacity 0.32s cubic-bezier(0.22, 1, 0.36, 1),
      transform 0.32s cubic-bezier(0.22, 1, 0.36, 1),
      visibility 0.32s ease;
  }

  .topbar.is-open .mobile-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0) scale(1);
    animation: menu-pop-in 0.38s cubic-bezier(0.22, 1, 0.36, 1);
  }

  .topnav {
    width: 100%;
    gap: 10px;
    flex-direction: column;
    align-items: flex-start;
  }

  .mobile-menu .topnav > a {
    display: flex;
    width: 100%;
    padding: 6px 0;
    font-size: 12px;
    letter-spacing: 0.06em;
    justify-content: center;
    text-align: center;
    font-family: Arial, sans-serif;
    opacity: 0;
    transform: translateY(8px);
    transition:
      opacity 0.24s ease,
      transform 0.24s cubic-bezier(0.22, 1, 0.36, 1);
  }

  .topbar.is-open .mobile-menu .topnav > a {
    animation: menu-item-in 0.26s cubic-bezier(0.22, 1, 0.36, 1) both;
  }

  .topbar.is-open .mobile-menu .topnav > a:nth-child(1) {
    animation-delay: 0.08s;
  }

  .topbar.is-open .mobile-menu .topnav > a:nth-child(2) {
    animation-delay: 0.12s;
  }

  .topbar.is-open .mobile-menu .topnav > a:nth-child(3) {
    animation-delay: 0.16s;
  }

  .topbar.is-open .mobile-menu .topnav > a:nth-child(4) {
    animation-delay: 0.2s;
  }

  .mobile-menu .install-link {
    width: 100%;
    min-height: 42px;
    font-family: Arial, sans-serif;
    opacity: 0;
    transform: translateY(10px);
    transition:
      opacity 0.24s ease,
      transform 0.24s cubic-bezier(0.22, 1, 0.36, 1);
  }

  .topbar.is-open .mobile-menu .install-link {
    animation: menu-item-in 0.26s cubic-bezier(0.22, 1, 0.36, 1) both 0.24s;
  }

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

  .period-options {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .primary-btn {
    width: 100%;
    min-width: 0;
  }

  .site-footer {
    margin-top: 52px;
    padding: 20px 0 24px;
    gap: 14px;
    justify-content: center;
    align-items: center;
  }

  .site-footer nav {
    width: 100%;
    flex-direction: row;
    gap: 10px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
  }

  .site-footer a {
    font-size: 12px;
  }

  .theme-toggle {
    right: 14px;
    bottom: 14px;
  }

  .legal {
    padding: 25px 16px;
  }

  .legal h1 {
    font-size: 28px;
  }

  .legal h2 {
    font-size: 23px;
  }

  .legal h3 {
    font-size: 18px;
  }

  .legal p,
  .legal li {
    font-size: 18px;
  }
}

@media (max-width: 760px) and (prefers-reduced-motion: reduce) {
  .menu-toggle,
  .menu-toggle:active,
  .topbar.is-open .menu-toggle,
  .mobile-menu,
  .topbar.is-open .mobile-menu,
  .mobile-menu .topnav > a,
  .topbar.is-open .mobile-menu .topnav > a,
  .mobile-menu .install-link,
  .topbar.is-open .mobile-menu .install-link {
    transition: none;
    animation: none;
    transform: none;
  }
}

@media (max-width: 420px) {
  .topbar {
    padding-top: 12px;
  }

  .brand {
    font-size: 20px;
  }

  .brand small {
    font-size: 12px;
  }

  .site-footer {
    margin-top: 42px;
  }

  .mobile-menu {
    width: calc(100vw - 26px);
  }
}