/* ==========================================================================
   Top bar
   ========================================================================== */

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 14px;
  height: 56px;
  padding: 0 20px;
  background: rgba(10, 10, 12, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--panel-border);
}

.topbar__menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--panel-border);
  color: var(--text);
  border-radius: var(--radius-sm);
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.topbar__brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
}

.topbar__brand svg { flex-shrink: 0; }

.topbar__spacer { flex: 1; }

.topbar__search {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 240px;
  padding: 7px 10px;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  color: var(--text-faint);
  font-size: 13px;
  background: var(--panel);
}
.topbar__search input {
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 13px;
  width: 100%;
}
.topbar__search input::placeholder { color: var(--text-faint); }

.topbar__github {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px 12px;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 13px;
  white-space: nowrap;
}
.topbar__github:hover { background: var(--hover); color: var(--text); text-decoration: none; }

/* ==========================================================================
   Shell / grid
   ========================================================================== */

.shell {
  display: grid;
  grid-template-columns: var(--nav-w) minmax(0, 1fr) var(--aside-w);
  align-items: start;
}

/* ---- left nav ---- */

.nav {
  position: sticky;
  top: 56px;
  height: calc(100vh - 56px);
  overflow-y: auto;
  padding: 20px 12px 40px;
  border-right: 1px solid var(--panel-border);
}

.nav__group + .nav__group { margin-top: 22px; }

.nav__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  padding: 0 10px 6px;
}

.nav__item {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  padding: 7px 10px;
  border: none;
  background: none;
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 13.5px;
  text-align: left;
  cursor: pointer;
  border-left: 2px solid transparent;
}

.nav__item:hover {
  background: var(--hover);
  color: var(--text);
}

.nav__item.is-active {
  background: var(--active);
  color: var(--text);
  border-left: 2px solid var(--accent-strong);
}

.nav__icon {
  flex-shrink: 0;
  opacity: 0.75;
  display: flex;
}

/* ---- main content ---- */

.main {
  min-width: 0;
  padding: 32px 40px 100px;
}

.crumb {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}

.crumb__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--text);
  border: 1px solid var(--panel-border);
  background: var(--panel);
  padding: 7px 14px;
  border-radius: 20px;
}
.crumb__tag svg { opacity: 0.7; }

.crumb__link {
  font-family: var(--font-mono);
  font-size: 12.5px;
  border: 1px solid var(--panel-border);
  padding: 7px 14px;
  border-radius: 20px;
  color: var(--text-dim);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.crumb__link:hover { color: var(--text); border-color: var(--accent-strong); text-decoration: none; }

.doc {
  max-width: 760px;
}

.doc h1 {
  font-size: 26px;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}

.doc__lede {
  color: var(--text-dim);
  font-size: 15px;
  line-height: 1.6;
  margin: 0 0 28px;
}

.doc h2 {
  font-size: 18px;
  margin: 36px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--panel-border);
}

.doc h3 {
  font-size: 15px;
  margin: 22px 0 10px;
  color: var(--text);
}

.doc p {
  line-height: 1.7;
  color: #cfcfd6;
  margin: 0 0 14px;
  font-size: 14.5px;
}

.doc ul, .doc ol {
  margin: 0 0 16px;
  padding-left: 22px;
  color: #cfcfd6;
  line-height: 1.75;
  font-size: 14.5px;
}
.doc li { margin-bottom: 5px; }
.doc li::marker { color: var(--text-faint); }

.doc code {
  background: var(--code-bg);
  color: var(--code-text);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 12.5px;
}

.doc a { text-underline-offset: 2px; }

.callout {
  display: flex;
  gap: 10px;
  padding: 12px 14px;
  border-radius: var(--radius);
  border: 1px solid var(--panel-border);
  background: var(--panel);
  margin: 0 0 18px;
  font-size: 13.5px;
  line-height: 1.6;
}
.callout svg { flex-shrink: 0; margin-top: 2px; }
.callout p { margin: 0; color: #cfcfd6; }
.callout strong { display: block; color: var(--text); margin-bottom: 2px; font-size: 13px; }

.callout--warn { border-color: rgba(226, 178, 92, 0.35); }
.callout--warn svg { color: var(--warn); }
.callout--danger { border-color: rgba(226, 116, 92, 0.35); }
.callout--danger svg { color: var(--danger); }
.callout--tip { border-color: rgba(123, 198, 150, 0.3); }
.callout--tip svg { color: var(--ok); }

.doc table {
  width: 100%;
  border-collapse: collapse;
  margin: 0 0 20px;
  font-size: 13.5px;
}
.doc th {
  text-align: left;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--text-faint);
  padding: 8px 12px;
  border-bottom: 1px solid var(--panel-border);
}
.doc td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--panel-border);
  color: #cfcfd6;
  vertical-align: top;
}
.doc tr:last-child td { border-bottom: none; }

.steps {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  counter-reset: step;
}
.steps li {
  counter-increment: step;
  position: relative;
  padding: 2px 0 16px 34px;
  font-size: 14.5px;
  color: #cfcfd6;
  line-height: 1.7;
  border-left: 1px solid var(--panel-border);
  margin-left: 11px;
}
.steps li:last-child { border-left-color: transparent; padding-bottom: 0; }
.steps li::before {
  content: counter(step);
  position: absolute;
  left: -12px;
  top: -1px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  color: var(--text-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.doc-footer {
  margin-top: 44px;
  padding-top: 20px;
  border-top: 1px solid var(--panel-border);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.doc-footer__nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 16px;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  font-size: 13px;
  min-width: 160px;
}
.doc-footer__nav.is-next { text-align: right; margin-left: auto; }
.doc-footer__nav span { color: var(--text-faint); font-size: 11px; font-family: var(--font-mono); }
.doc-footer__nav a { color: var(--text); font-weight: 500; }
.doc-footer__nav:hover { border-color: var(--accent-strong); }

/* ---- right aside ---- */

.aside {
  position: sticky;
  top: 56px;
  height: calc(100vh - 56px);
  overflow-y: auto;
  padding: 28px 24px 40px;
  border-left: 1px solid var(--panel-border);
}

.aside__blurb {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-dim);
  margin-bottom: 26px;
}
.aside__blurb a { color: var(--accent); }

.aside__divider {
  border: none;
  border-top: 1px solid var(--panel-border);
  margin: 22px 0;
}

.aside__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--text-faint);
  margin-bottom: 12px;
}

.fact {
  margin-bottom: 14px;
}
.fact__label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  margin-bottom: 4px;
}
.fact__value {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 14px;
  color: var(--text);
}
.fact__value svg { opacity: 0.6; width: 14px; height: 14px; }

.support-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 9px 0;
  font-size: 13.5px;
  color: var(--text);
  border-bottom: 1px solid var(--panel-border);
}
.support-link:last-child { border-bottom: none; }
.support-link:hover { color: var(--accent); text-decoration: none; }
.support-link svg { opacity: 0.5; }

.aside__card {
  margin-top: 24px;
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  padding: 16px;
  background:
    linear-gradient(160deg, rgba(169,174,255,0.07), rgba(226,162,86,0.05));
}
.aside__card-title {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--text);
  margin-bottom: 6px;
}
.aside__card-text {
  font-size: 12.5px;
  color: var(--text-dim);
  line-height: 1.6;
  margin-bottom: 10px;
}
.aside__card a {
  font-size: 12.5px;
  font-weight: 600;
}

/* ==========================================================================
   Mobile
   ========================================================================== */

@media (max-width: 1180px) {
  .shell { grid-template-columns: var(--nav-w) minmax(0, 1fr); }
  .aside { display: none; }
}

@media (max-width: 860px) {
  .topbar__search { display: none; }
  .topbar__menu-btn { display: flex; }
  .shell { grid-template-columns: 1fr; }
  .nav {
    position: fixed;
    left: 0;
    top: 56px;
    width: min(80vw, 300px);
    background: var(--bg);
    transform: translateX(-100%);
    transition: transform 0.18s ease;
    z-index: 25;
  }
  body.nav-open .nav { transform: translateX(0); }
  body.nav-open::after {
    content: "";
    position: fixed;
    inset: 56px 0 0 0;
    background: rgba(0,0,0,0.5);
    z-index: 20;
  }
  .main { padding: 24px 18px 80px; }
  .crumb { flex-wrap: wrap; }
}