:root {
  --page: #05070a;
  --panel: #0b1218;
  --panel-2: #101920;
  --panel-3: #111923;
  --ink: #f4fbff;
  --soft: #b9c8d0;
  --muted: #7f919b;
  --line: #243542;
  --line-soft: rgba(129, 166, 184, 0.18);
  --cyan: #21eadf;
  --blue: #2184ff;
  --green: #72f29a;
  --amber: #ffb347;
  --rose: #ef5771;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "IBM Plex Sans", system-ui, sans-serif;
  background:
    linear-gradient(90deg, rgba(33, 234, 223, 0.08) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(135deg, #05070a 0%, #071119 42%, #0b1018 100%);
  background-size: 64px 64px, 64px 64px, auto;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(120deg, rgba(33, 234, 223, 0.18), transparent 34%),
    linear-gradient(300deg, rgba(33, 132, 255, 0.13), transparent 28%);
  opacity: 0.7;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  padding: 14px 0;
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0;
}

.brand img {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.mail-link,
.primary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid rgba(33, 234, 223, 0.36);
  border-radius: 6px;
  color: #061113;
  background: linear-gradient(135deg, var(--cyan), #7df7ff);
  text-decoration: none;
  font-weight: 700;
  white-space: nowrap;
}

.layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 36px;
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  padding: 38px 0 72px;
}

.support-nav {
  position: sticky;
  top: 88px;
  align-self: start;
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: rgba(7, 13, 19, 0.76);
}

.nav-label {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.support-nav a {
  display: block;
  padding: 9px 0;
  color: var(--soft);
  text-decoration: none;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

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

.content {
  display: grid;
  gap: 34px;
}

.intro {
  min-height: 430px;
  display: grid;
  align-content: end;
  gap: 18px;
  padding: 48px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(5, 7, 10, 0.96) 0%, rgba(5, 7, 10, 0.72) 54%, rgba(5, 7, 10, 0.28) 100%),
    url("/assets/zadplay-logo.png") right 32px center / min(43vw, 440px) auto no-repeat,
    linear-gradient(135deg, #061015, #0c1821);
}

.kicker {
  margin: 0;
  color: var(--cyan);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
  letter-spacing: 0;
}

h1 {
  max-width: 620px;
  font-size: 4.4rem;
  line-height: 0.98;
}

h2 {
  font-size: 2rem;
  line-height: 1.08;
}

h3 {
  font-size: 1.1rem;
  line-height: 1.24;
}

p {
  margin: 0;
  color: var(--soft);
  line-height: 1.72;
}

.intro p {
  max-width: 660px;
  font-size: 1.08rem;
}

.intro-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 4px;
}

.intro-actions span {
  color: var(--muted);
  font-size: 0.94rem;
}

.quick-map {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--line-soft);
}

.quick-map a {
  display: grid;
  gap: 8px;
  min-height: 118px;
  padding: 20px;
  color: var(--soft);
  background: rgba(9, 17, 24, 0.94);
  text-decoration: none;
}

.quick-map a:hover {
  background: rgba(12, 26, 34, 0.98);
}

.quick-map span {
  color: var(--ink);
  font-weight: 800;
}

.help-section {
  display: grid;
  gap: 22px;
  padding-top: 12px;
  scroll-margin-top: 90px;
}

.section-title {
  display: grid;
  gap: 8px;
  max-width: 820px;
}

.steps,
.feature-list,
.plan-grid,
.split {
  display: grid;
  gap: 12px;
}

.steps {
  counter-reset: item;
}

.step {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 18px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.step:last-child {
  border-bottom: 1px solid var(--line);
}

.step > span {
  color: var(--cyan);
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
}

.step div {
  display: grid;
  gap: 7px;
}

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

.split > div,
.plan-grid > div,
.feature-list > div,
.security-panel > div,
.support-checklist,
.notice {
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: rgba(10, 18, 25, 0.82);
}

.split > div,
.plan-grid > div,
.feature-list > div,
.security-panel > div,
.support-checklist {
  display: grid;
  gap: 8px;
  padding: 20px;
}

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

.feature-list > div:nth-child(1) {
  border-left: 4px solid var(--cyan);
}

.feature-list > div:nth-child(2) {
  border-left: 4px solid var(--blue);
}

.feature-list > div:nth-child(3) {
  border-left: 4px solid var(--amber);
}

.feature-list > div:nth-child(4) {
  border-left: 4px solid var(--green);
}

.notice {
  padding: 18px 20px;
  color: #d7e8ef;
  line-height: 1.7;
  border-color: rgba(255, 179, 71, 0.3);
  background:
    linear-gradient(90deg, rgba(255, 179, 71, 0.1), transparent 38%),
    rgba(11, 18, 24, 0.88);
}

.notice--calm {
  border-color: rgba(33, 234, 223, 0.24);
  background:
    linear-gradient(90deg, rgba(33, 234, 223, 0.09), transparent 42%),
    rgba(11, 18, 24, 0.88);
}

.security-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.security-panel > div {
  position: relative;
  overflow: hidden;
}

.security-panel > div::before {
  content: "";
  width: 36px;
  height: 3px;
  display: block;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan), var(--blue));
}

.plain-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.plain-list li {
  position: relative;
  padding: 14px 16px 14px 42px;
  color: var(--soft);
  line-height: 1.6;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: rgba(10, 18, 25, 0.82);
}

.plain-list li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 23px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 5px rgba(33, 234, 223, 0.12);
}

.ordered-flow {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: flow;
}

.ordered-flow li {
  counter-increment: flow;
  position: relative;
  padding: 16px 16px 16px 54px;
  color: var(--soft);
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: rgba(10, 18, 25, 0.82);
  line-height: 1.6;
}

.ordered-flow li::before {
  content: counter(flow);
  position: absolute;
  left: 16px;
  top: 16px;
  width: 24px;
  height: 24px;
  display: grid;
  place-items: center;
  color: #061113;
  background: var(--cyan);
  border-radius: 50%;
  font-size: 0.78rem;
  font-weight: 800;
}

.reference-table {
  display: grid;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(5, 8, 12, 0.7);
}

.reference-table > div {
  display: grid;
  grid-template-columns: minmax(160px, 0.36fr) minmax(0, 1fr);
  gap: 18px;
  padding: 15px 18px;
  border-top: 1px solid var(--line);
}

.reference-table > div:first-child {
  border-top: 0;
  color: var(--ink);
  background: var(--panel-2);
  font-weight: 800;
}

.reference-table span:first-child {
  color: var(--ink);
  font-weight: 700;
}

.reference-table span:last-child {
  color: var(--soft);
  line-height: 1.55;
}

.support-checklist ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 20px;
  color: var(--soft);
  line-height: 1.6;
}

.faq {
  padding-bottom: 10px;
}

details {
  border-top: 1px solid var(--line);
}

details:last-child {
  border-bottom: 1px solid var(--line);
}

summary {
  cursor: pointer;
  padding: 18px 0;
  color: var(--ink);
  font-weight: 800;
}

details p {
  padding: 0 0 18px;
}

.contact-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px;
  border: 1px solid rgba(33, 234, 223, 0.28);
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(33, 234, 223, 0.12), transparent 42%),
    var(--panel);
}

.contact-strip div {
  display: grid;
  gap: 6px;
}

@media (max-width: 940px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .support-nav {
    position: static;
    display: flex;
    gap: 6px;
    overflow-x: auto;
    padding: 10px;
  }

  .nav-label {
    display: none;
  }

  .support-nav a {
    flex: 0 0 auto;
    padding: 9px 12px;
    border: 1px solid var(--line-soft);
    border-radius: 6px;
  }

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

  .intro {
    min-height: 380px;
    background:
      linear-gradient(90deg, rgba(5, 7, 10, 0.96), rgba(5, 7, 10, 0.78)),
      url("/assets/zadplay-logo.png") right 20px center / 320px auto no-repeat,
      linear-gradient(135deg, #061015, #0c1821);
  }
}

@media (max-width: 720px) {
  .site-header {
    width: min(100% - 20px, var(--max));
  }

  .mail-link {
    display: none;
  }

  .layout {
    width: min(100% - 20px, var(--max));
    gap: 24px;
    padding-top: 18px;
  }

  .intro {
    min-height: 430px;
    padding: 28px;
    background:
      linear-gradient(180deg, rgba(5, 7, 10, 0.64), rgba(5, 7, 10, 0.96) 58%),
      url("/assets/zadplay-logo.png") center 22px / 230px auto no-repeat,
      linear-gradient(135deg, #061015, #0c1821);
  }

  h1 {
    font-size: 3rem;
  }

  h2 {
    font-size: 1.58rem;
  }

  .quick-map,
  .split,
  .plan-grid,
  .security-panel,
  .feature-list {
    grid-template-columns: 1fr;
  }

  .step {
    grid-template-columns: 44px minmax(0, 1fr);
  }

  .reference-table > div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

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

  .primary-action {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}