/* XHub Tutorial / Installation — distinct layout from portal cards */

:root {
  --tut-ink: #0a0a0a;
  --tut-panel: #121212;
  --tut-line: rgba(255, 255, 255, 0.1);
  --tut-mute: rgba(255, 255, 255, 0.58);
  --tut-accent: #e10600;
  --tut-accent-dim: rgba(225, 6, 0, 0.16);
  --tut-radius: 10px;
  --tut-font: 'Fredoka', system-ui, sans-serif;
  --tut-display: 'Fredoka', system-ui, sans-serif;
  --tut-mono: "JetBrains Mono", ui-monospace, monospace;
}

html[data-site-theme="light"] {
  --tut-ink: #f4f4f2;
  --tut-panel: #ffffff;
  --tut-line: rgba(0, 0, 0, 0.12);
  --tut-mute: rgba(0, 0, 0, 0.55);
  --tut-accent-dim: rgba(225, 6, 0, 0.1);
}

.tut-page {
  font-family: var(--tut-font);
  max-width: 1120px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 4rem;
}

.tut-intro {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.75rem;
  align-items: end;
  padding: 1.25rem 0 2rem;
  border-bottom: 1px solid var(--tut-line);
  margin-bottom: 2rem;
}

.tut-kicker {
  font-family: var(--tut-mono);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--tut-accent);
  margin: 0 0 0.75rem;
}

.tut-title {
  font-family: var(--tut-display);
  font-size: clamp(2rem, 5vw, 3.15rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin: 0 0 0.85rem;
  color: var(--site-text, #fff);
}

.tut-lead {
  margin: 0;
  max-width: 36rem;
  color: var(--tut-mute);
  font-size: 1.02rem;
  line-height: 1.6;
}

.tut-progress {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.45rem;
}

.tut-progress a {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.65rem 0.75rem;
  text-decoration: none;
  color: var(--site-text, #fff);
  background: var(--tut-panel);
  border: 1px solid var(--tut-line);
  border-radius: var(--tut-radius);
  font-size: 0.78rem;
  font-weight: 600;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.tut-progress a:hover {
  border-color: var(--tut-accent);
  background: var(--tut-accent-dim);
  transform: translateY(-1px);
}

.tut-progress span {
  font-family: var(--tut-mono);
  font-size: 0.72rem;
  color: var(--tut-accent);
  min-width: 1.4rem;
}

.tut-layout {
  display: grid;
  grid-template-columns: 11.5rem 1fr;
  gap: 1.75rem;
  align-items: start;
}

.tut-rail {
  position: sticky;
  top: 5.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  padding: 0.35rem 0;
}

.tut-rail a {
  position: relative;
  display: block;
  padding: 0.55rem 0.65rem 0.55rem 1.1rem;
  color: var(--tut-mute);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
  border-left: 2px solid var(--tut-line);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.tut-rail a:hover,
.tut-rail a.is-active {
  color: var(--site-text, #fff);
  border-left-color: var(--tut-accent);
}

.tut-rail a small {
  display: block;
  font-family: var(--tut-mono);
  font-size: 0.65rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.7;
  margin-bottom: 0.1rem;
}

.tut-steps {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.tut-step {
  scroll-margin-top: 6rem;
  background: var(--tut-panel);
  border: 1px solid var(--tut-line);
  border-radius: var(--tut-radius);
  overflow: hidden;
  animation: tutRise 0.55s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.tut-step:nth-child(2) { animation-delay: 0.05s; }
.tut-step:nth-child(3) { animation-delay: 0.1s; }
.tut-step:nth-child(4) { animation-delay: 0.15s; }

@keyframes tutRise {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

.tut-step-head {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 1rem 1.15rem;
  border-bottom: 1px solid var(--tut-line);
}

.tut-step-num {
  flex-shrink: 0;
  width: 2.35rem;
  height: 2.35rem;
  display: grid;
  place-items: center;
  font-family: var(--tut-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: #fff;
  background: var(--tut-accent);
  border-radius: 6px;
}

.tut-step-head h2 {
  margin: 0;
  font-family: var(--tut-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--site-text, #fff);
}

.tut-step-body {
  padding: 1.1rem 1.15rem 1.25rem;
}

.tut-step-body p {
  margin: 0 0 1rem;
  color: var(--tut-mute);
  font-size: 0.95rem;
  line-height: 1.65;
}

.tut-step-body p:last-child { margin-bottom: 0; }

.tut-executors {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.25rem;
}

.tut-chip {
  padding: 0.35rem 0.7rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--site-text, #fff);
  border: 1px solid var(--tut-line);
  border-radius: 4px;
  background: transparent;
}

.tut-terminal {
  margin-top: 0.35rem;
  border: 1px solid var(--tut-line);
  border-radius: var(--tut-radius);
  background: #070707;
  overflow: hidden;
}

html[data-site-theme="light"] .tut-terminal {
  background: #111;
}

.tut-terminal-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 0.8rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.03);
}

.tut-terminal-bar .lang {
  font-family: var(--tut-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.45);
}

.tut-copy {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: transparent;
  color: #fff;
  font-family: inherit;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.35rem 0.7rem;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.tut-copy:hover {
  background: var(--tut-accent);
  border-color: var(--tut-accent);
}

.tut-terminal pre {
  margin: 0;
  padding: 1rem 1.05rem 1.15rem;
  overflow-x: auto;
  font-family: var(--tut-mono);
  font-size: 0.82rem;
  line-height: 1.55;
  color: #f2f2f2;
  white-space: pre-wrap;
  word-break: break-all;
}

.tut-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.25rem;
}

.tut-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.15rem;
  font-family: inherit;
  font-size: 0.84rem;
  font-weight: 700;
  text-decoration: none;
  border-radius: 6px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.2s ease, border-color 0.2s ease;
}

.tut-btn:hover { transform: translateY(-1px); }

.tut-btn--primary {
  background: var(--tut-accent);
  color: #fff;
  box-shadow: 0 8px 22px rgba(225, 6, 0, 0.28);
}

.tut-btn--ghost {
  background: transparent;
  color: var(--site-text, #fff);
  border-color: var(--tut-line);
}

.tut-btn--ghost:hover {
  border-color: var(--tut-accent);
  background: var(--tut-accent-dim);
}

.tut-rules {
  margin-top: 2.25rem;
  padding: 1.35rem 1.25rem;
  border: 1px solid var(--tut-line);
  border-radius: var(--tut-radius);
  background:
    linear-gradient(135deg, var(--tut-accent-dim), transparent 42%),
    var(--tut-panel);
}

.tut-rules h2 {
  margin: 0 0 0.35rem;
  font-family: var(--tut-display);
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  color: var(--site-text, #fff);
}

.tut-rules > p {
  margin: 0 0 1rem;
  color: var(--tut-mute);
  font-size: 0.92rem;
}

.tut-trust {
  margin: 0 0 1rem;
  padding: 0.85rem 1rem;
  border: 1px solid color-mix(in srgb, #3dd68c 35%, var(--tut-line));
  border-radius: 6px;
  background: color-mix(in srgb, #3dd68c 8%, var(--tut-ink) 40%);
}

.tut-trust h3 {
  margin: 0 0 0.35rem;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #3dd68c;
}

.tut-trust p {
  margin: 0;
  color: var(--tut-mute);
  font-size: 0.9rem;
  line-height: 1.55;
}

.tut-rules-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.tut-rule {
  padding: 0.9rem 0.95rem;
  border: 1px solid var(--tut-line);
  border-radius: 6px;
  background: color-mix(in srgb, var(--tut-ink) 35%, transparent);
}

.tut-rule h3 {
  margin: 0 0 0.45rem;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.tut-rule--do h3 { color: #3dd68c; }
.tut-rule--dont h3 { color: #ff5a5a; }

.tut-rule ul {
  margin: 0;
  padding-left: 1.05rem;
  color: var(--tut-mute);
  font-size: 0.88rem;
  line-height: 1.55;
}

.tut-rule li + li { margin-top: 0.3rem; }

.tut-help {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--tut-line);
  border-radius: var(--tut-radius);
  background: var(--tut-panel);
}

.tut-help h2 {
  margin: 0 0 0.25rem;
  font-family: var(--tut-display);
  font-size: 1.1rem;
  color: var(--site-text, #fff);
}

.tut-help p {
  margin: 0;
  color: var(--tut-mute);
  font-size: 0.9rem;
  max-width: 34rem;
}

.tut-help p a {
  color: var(--tut-accent);
  font-weight: 700;
  text-decoration: none;
}

.tut-help p a:hover { text-decoration: underline; }

.tut-footer {
  margin-top: 2.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--tut-line);
  text-align: center;
  color: var(--tut-mute);
  font-size: 0.78rem;
}

@media (max-width: 900px) {
  .tut-page {
    padding: 1rem max(16px, env(safe-area-inset-left)) calc(3.5rem + env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-right));
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
  }

  .tut-intro,
  .tut-layout,
  .tut-rules-grid,
  .tut-progress {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .tut-lead {
    margin-left: auto;
    margin-right: auto;
  }

  .tut-intro {
    align-items: center;
    gap: 1.1rem;
  }

  .tut-progress a {
    min-height: 44px;
    justify-content: center;
  }

  .tut-rail {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-bottom: 0.25rem;
    justify-content: center;
  }

  .tut-rail a {
    border-left: 0;
    border: 1px solid var(--tut-line);
    border-radius: 6px;
    padding: 0.55rem 0.7rem;
    min-height: 44px;
  }

  .tut-rail a.is-active {
    border-color: var(--tut-accent);
    background: var(--tut-accent-dim);
  }

  .tut-help { align-items: stretch; }
  .tut-btn,
  .tut-step-body .dx-btn {
    width: 100%;
    min-height: 44px;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .tut-step { animation: none; }
  .tut-btn:hover,
  .tut-progress a:hover { transform: none; }
}