/* ---------- tutorial ---------- */
.guide-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.toc-card {
  position: sticky;
  top: calc(var(--header-h) + 20px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toc-title {
  font-size: 11.5px;
  font-weight: 800;
  color: var(--muted);
  letter-spacing: .12em;
  text-transform: uppercase;
}

.toc-card nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toc-card nav a {
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 13px;
  color: #3E3850;
  transition: .2s;
}

.toc-card nav a:hover,
.toc-card nav a.is-active {
  background: var(--brand-l);
  color: var(--brand-d);
  font-weight: 700;
}

.toc-card .btn {
  margin-top: 6px;
}

.guide-main {
  display: flex;
  flex-direction: column;
  gap: 18px;
  min-width: 0;
}

.guide-block {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 26px;
}

.guide-head {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 20px;
}

.guide-num {
  width: 46px;
  height: 46px;
  flex: none;
  border-radius: 13px;
  background: var(--brand-l);
  color: var(--brand-d);
  display: grid;
  place-items: center;
  font-size: 18px;
  font-weight: 900;
  font-family: ui-monospace, Consolas, monospace;
}

.guide-head h2 {
  font-size: 22px;
  margin: 0 0 4px;
}

.guide-head p {
  margin: 0;
  font-size: 13.5px;
  color: var(--sub);
}

.guide-list {
  padding: 0;
  list-style: none;
  counter-reset: g;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.guide-list li {
  counter-increment: g;
  position: relative;
  padding-left: 34px;
  font-size: 13.5px;
  color: var(--sub);
  line-height: 1.75;
}

.guide-list li::before {
  content: counter(g);
  position: absolute;
  left: 0;
  top: 2px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--brand-l);
  color: var(--brand-d);
  font-size: 11px;
  font-weight: 800;
  display: grid;
  place-items: center;
}

.guide-list li b {
  display: block;
  color: var(--ink);
  font-size: 14px;
}

.tip-box {
  margin-top: 18px;
  background: #FAF8FE;
  border: 1px solid #EFEAF8;
  border-left: 4px solid var(--brand);
  border-radius: 12px;
  padding: 13px 16px;
  font-size: 12.5px;
  color: var(--sub);
}

.tip-box b {
  display: block;
  color: var(--ink);
  font-size: 13px;
  margin-bottom: 3px;
}

.tip-box p {
  margin: 0;
}

.split-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.mini-card {
  background: #FAF8FE;
  border: 1px solid #EFEAF8;
  border-radius: 12px;
  padding: 16px 18px;
}

.mini-card h4 {
  margin: 0 0 8px;
  font-size: 14px;
}

.mini-card ul {
  margin: 0;
  padding-left: 17px;
  font-size: 12.5px;
  color: var(--sub);
  line-height: 1.8;
}

.mini-card li b {
  color: var(--ink);
}

.check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.check-list li {
  position: relative;
  padding: 11px 12px 11px 36px;
  background: #FAF8FE;
  border: 1px solid #EFEAF8;
  border-radius: 10px;
  font-size: 12.5px;
  color: #3E3850;
  line-height: 1.6;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 12px;
  top: 10px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-size: 10px;
  font-weight: 900;
  display: grid;
  place-items: center;
}

.compat-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 26px;
}

.compat-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.compat-head h2 {
  font-size: 22px;
  margin: 6px 0 4px;
}

.compat-head p {
  margin: 0;
  font-size: 12.5px;
  color: var(--sub);
  max-width: 560px;
}

.search-field {
  min-width: 220px;
}

.search-field input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 13px;
  font-size: 13px;
  outline: none;
  transition: .2s;
  background: #FAF8FE;
}

.search-field input:focus {
  border-color: var(--brand);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(104, 64, 200, .10);
}

.compat-table b {
  font-size: 13px;
}

.protocol-tag {
  display: inline-block;
  background: var(--brand-l);
  color: var(--brand-d);
  font-size: 11px;
  font-weight: 800;
  border-radius: 5px;
  padding: 2px 6px;
  white-space: nowrap;
}

.muted-cell {
  color: var(--muted);
  font-size: 12px;
}

.compat-note {
  margin: 12px 0 0;
  font-size: 11.5px;
  color: var(--muted);
}

.compat-table tr.is-hidden {
  display: none;
}

/* ---------- contact ---------- */
.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr);
  gap: 26px;
  align-items: start;
}

.contact-main {
  min-width: 0;
}

.form-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.form-head h2 {
  font-size: 24px;
  margin: 6px 0 6px;
}

.form-head p {
  margin: 0 0 22px;
  color: var(--sub);
  font-size: 13px;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.field-full {
  grid-column: 1 / -1;
}

.form-foot {
  text-align: center;
  color: var(--muted);
  font-size: 11.5px;
  margin: 12px 0 0;
}

.form-success {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 44px 32px;
  box-shadow: var(--shadow);
  text-align: center;
}

.form-success[hidden] {
  display: none;
}

.success-icon {
  width: 54px;
  height: 54px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--brand-l);
  color: var(--brand);
  display: grid;
  place-items: center;
  font-size: 24px;
  font-weight: 900;
}

.form-success h2 {
  font-size: 22px;
  margin: 0 0 8px;
}

.form-success p {
  color: var(--sub);
  font-size: 13.5px;
  margin: 0 0 8px;
}

.form-success b {
  color: var(--brand-d);
  font-family: ui-monospace, Consolas, monospace;
}

.form-success-hint {
  max-width: 460px;
  margin: 0 auto 20px !important;
  font-size: 12.5px !important;
  color: var(--muted) !important;
}

.form-success-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.contact-aside {
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: sticky;
  top: calc(var(--header-h) + 20px);
}

.aside-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
}

.aside-card h3 {
  font-size: 15px;
  margin: 0 0 5px;
}

.aside-card p {
  margin: 0;
  font-size: 12.5px;
  color: var(--sub);
}

.aside-card .ico {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  font-size: 16px;
  margin-bottom: 10px;
}

.aside-card-soft {
  background: var(--brand-l);
  border-color: #DCCEF8;
}

.aside-card-soft p {
  color: var(--brand-d);
}

.aside-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-top: 10px;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--brand-d);
}

.aside-links a:hover {
  color: var(--accent-d);
}

.contact-methods {
  margin: 10px 0 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12.5px;
}

.contact-methods div {
  display: flex;
  gap: 10px;
}

.contact-methods dt {
  color: var(--muted);
  min-width: 42px;
}

.contact-methods dd {
  margin: 0;
  color: var(--ink);
  font-weight: 600;
  overflow-wrap: anywhere;
}

/* ---------- legal ---------- */
.legal-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.legal-aside {
  position: sticky;
  top: calc(var(--header-h) + 20px);
}

.legal-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 34px 38px;
  font-size: 14px;
  color: #3E3850;
  min-width: 0;
}

.legal-card section + section {
  margin-top: 26px;
  padding-top: 26px;
  border-top: 1px solid #F0F3F8;
}

.legal-card h2 {
  font-size: 19px;
  margin: 0 0 8px;
}

.legal-card p {
  margin: 0 0 10px;
  color: #4A5568;
}

.legal-card p:last-child {
  margin-bottom: 0;
}

.legal-card ul {
  margin: 0 0 10px;
  padding-left: 20px;
  color: #4A5568;
}

.legal-card li {
  margin: 4px 0;
}

.legal-card a {
  color: var(--brand-d);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.legal-card b {
  color: var(--ink);
}

/* ---------- error ---------- */
.error-page {
  padding: 70px 0 80px;
  text-align: center;
}

.error-inner {
  max-width: 620px;
}

.error-code {
  font-size: 120px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -4px;
  color: #EDE6FB;
  margin-bottom: 8px;
  font-family: ui-monospace, Consolas, monospace;
}

.error-page h1 {
  font-size: 36px;
  margin: 4px 0 10px;
}

.error-page .lede {
  margin-left: auto;
  margin-right: auto;
  max-width: 520px;
}

.error-page .cta-row {
  justify-content: center;
  margin-top: 22px;
}

.error-links {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 22px;
  font-size: 12.5px;
  color: var(--muted);
}

.error-links a:hover {
  color: var(--brand);
}