:root {
  --page-bg: #f7f8f9;
  --header-bg: #ffffff;
  --card-bg: #ffffff;
  --border: #ececf1;
  --divider: #ededf2;
  --icon-bg: #f7f7fb;
  --text: #17161f;
  --body: #58567a;
  --muted: #7a76a1;
  --brand: #7a33ff;
  --success: #2ecc63;
  --success-hover: #26c15d;
  --card-radius: 16px;
  --icon-radius: 4px;
  --container: 800px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  background: var(--page-bg);
  color: var(--text);
  font-family: "DM Sans", Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; display: block; }
button, input, textarea, select { font: inherit; }

.topbar {
  height: 92px;
  background: var(--header-bg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.topbar img {
  width: 180px;
  height: auto;
  object-fit: contain;
}

.page {
  padding: 48px 20px 72px;
}

.stack {
  width: min(100%, var(--container));
  margin: 0 auto;
  display: grid;
  gap: 16px;
}

.card {
  background: var(--card-bg);
  border: 1px solid rgba(23, 22, 31, 0.03);
  border-radius: var(--card-radius);
  box-shadow: none;
  overflow: hidden;
}

.card-inner {
  padding: 24px;
}

.title {
  margin: 0 0 28px;
  font-size: 28px;
  line-height: 1.15;
  font-weight: 500;
  letter-spacing: -0.03em;
  color: #111111;
}

.section-title {
  margin: 0;
  font-size: 25px;
  line-height: 1.16;
  font-weight: 500;
  letter-spacing: -0.025em;
  color: #191821;
}

.feature-list {
  display: grid;
  gap: 22px;
}

.feature {
  display: grid;
  grid-template-columns: 52px 1fr;
  align-items: center;
  gap: 16px;
}

.icon-box {
  width: 52px;
  height: 52px;
  border-radius: var(--icon-radius);
  background: var(--icon-bg);
  display: grid;
  place-items: center;
  color: #8a86b0;
  flex: 0 0 auto;
}

.icon-box svg {
  width: 32px;
  height: 32px;
  stroke: currentColor;
}

.feature p,
.support-copy h3,
.support-copy p,
.contact-name,
.contact-role {
  margin: 0;
}

.feature p {
  font-size: 20px;
  line-height: 1.35;
  font-weight: 400;
  color: #565479;
  letter-spacing: -0.015em;
}

.divider {
  height: 1px;
  background: var(--divider);
  margin: 22px 0 0;
}

.support-row {
  width: 100%;
  background: transparent;
  border: 0;
  padding: 22px 0 0;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 16px;
  text-align: left;
  cursor: pointer;
}

.support-copy h3 {
  font-size: 15.5px;
  line-height: 1.3;
  font-weight: 700;
  color: #1a1923;
  letter-spacing: -0.015em;
  margin-bottom: 2px;
}

.support-copy p {
  font-size: 15px;
  line-height: 1.3;
  color: #67648a;
  letter-spacing: -0.015em;
}

.arrow {
  color: #15141c;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  margin-right: 4px;
}

.arrow svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  stroke-width: 2.25;
}

.support-row.disabled {
  opacity: 0.5;
  pointer-events: none;
  cursor: not-allowed;
}

.contact-header {
  padding: 24px 24px 18px;
}

.contact-body {
  padding: 0 24px 24px;
}

.contact-divider {
  height: 1px;
  background: var(--divider);
  margin: 0 24px;
}

.contact-profile {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 8px;
  align-items: center;
  margin-bottom: 28px;
  padding-top: 20px;
}

.avatar {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  object-fit: cover;
  background: #d9c8ff;
}

.contact-name {
  font-size: 18px;
  line-height: 1.2;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: #16151d;
  margin-bottom: 2px;
}

.contact-role {
  font-size: 15px;
  line-height: 1.3;
  color: #7a76a1;
  letter-spacing: -0.015em;
}

.cta {
  width: 100%;
  min-height: 46px;
  border: 0;
  border-radius: 14px;
  background: var(--success);
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-size: 15px;
  line-height: 1;
  font-weight: 500;
  letter-spacing: -0.01em;
  padding: 13px 20px;
  cursor: pointer;
  transition: background-color .18s ease, transform .18s ease;
}

.cta:hover { background: var(--success-hover); }
.cta:active { transform: translateY(1px); }

.cta svg {
  width: 19px;
  height: 19px;
  fill: currentColor;
  flex: 0 0 auto;
}

@media (max-width: 860px) {
  .page { padding: 22px 12px 36px; }
  .stack { gap: 12px; }
  .topbar { height: 82px; }
  .topbar img { width: 126px; }
  .card-inner,
  .contact-header,
  .contact-body { padding-left: 18px; padding-right: 18px; }
  .card-inner { padding-top: 20px; padding-bottom: 18px; }
  .contact-header { padding-top: 20px; padding-bottom: 16px; }
  .contact-body { padding-top: 18px; padding-bottom: 18px; }
  .title { font-size: 24px; margin-bottom: 22px; }
  .section-title { font-size: 23px; }
  .feature { gap: 12px; grid-template-columns: 48px 1fr; }
  .icon-box { width: 48px; height: 48px; }
  .icon-box svg { width: 22px; height: 22px; }
  .feature-list { gap: 20px; }
  .feature p { font-size: 18px; }
  .support-copy h3,
  .support-copy p,
  .contact-role,
  .cta { font-size: 14.5px; }
  .contact-profile { grid-template-columns: 52px 1fr; margin-bottom: 22px; padding-top: 18px; }
  .avatar { width: 52px; height: 44px; }
  .contact-name { font-size: 17px; }
  .arrow { margin-right: 0; width: 24px; height: 24px; }
  .arrow svg { width: 20px; height: 20px; }
}