/* landing.css — Header, hero, sections specific to index.html and subpages */

/* ----- Why list ----- */
.why-list {
  list-style: none;
  padding: 0;
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.why-list li {
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--fg-dim);
  padding-left: 1.25rem;
  position: relative;
}

.why-list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--primary);
}

.why-list li strong { color: var(--fg); }

/* ----- Architecture diagram ----- */
.architecture-diagram {
  margin: 1.5rem 0;
  text-align: center;
  overflow-x: auto;
}

.architecture-diagram img {
  max-width: 100%;
  height: auto;
}

/* ----- Layer descriptions ----- */
.layer-descriptions {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  margin-top: 1.25rem;
}

.layer-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 0.75rem;
  align-items: baseline;
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
}

.layer-row:nth-child(odd) { background: rgba(255,255,255,0.02); }

.layer-row code {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary);
}

.layer-row span {
  font-size: 0.85rem;
  color: var(--fg-dim);
  line-height: 1.5;
}

/* ----- Logo ----- */
.logo-ascii {
  font-family: var(--mono);
  font-size: 1rem;
  line-height: 1.2;
  color: var(--fg);
  margin-bottom: 1.25rem;
  user-select: none;
}

.logo-ascii .logo-corner { color: var(--fg); }
.logo-ascii .logo-dot    { color: var(--green); }

/* ----- Back nav (subpages) ----- */
.back-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--muted);
  padding: 1.5rem 0 0;
}

.back-nav a { color: var(--accent); }
.back-sep   { color: var(--border-strong); }

/* ----- Element pill (subpage header) ----- */
.element-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(59, 130, 246, 0.2);
  border-radius: 99px;
  padding: 0.25rem 0.75rem;
  margin-bottom: 1rem;
  margin-top: 2rem;
}

.element-pill .element-symbol {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.element-pill .element-name {
  font-size: 0.8rem;
  color: var(--fg-dim);
}

/* ----- Registry links (subpage header) ----- */
.registry-links {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
}

/* ----- Header ----- */
header {
  padding-top: 3rem;
  padding-bottom: 1rem;
  text-align: center;
}

header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 0.5rem;
}

header h1 .brand { color: var(--primary); }

.primary-tagline {
  font-size: 1.1rem;
  color: var(--fg-dim);
  margin-bottom: 0.35rem;
}

.secondary-tagline {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 1rem;
}

/* ----- Hero install ----- */
.hero-install {
  max-width: 580px;
  margin: 0 auto 1.5rem;
  text-align: left;
}

/* ----- Hero links ----- */
.hero-links {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.hero-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s;
}

.hero-link:hover {
  text-decoration: none;
  border-bottom-color: var(--accent);
}

/* ----- Intro paragraph ----- */
.intro {
  margin-top: 2.5rem;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--fg-dim);
}

.intro strong { color: var(--fg); }

/* ----- Four elements ----- */
.elements-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-top: 1.25rem;
}

@media (max-width: 500px) {
  .elements-grid { grid-template-columns: 1fr; }
}

.element-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.1rem 1.25rem;
  transition: border-color 0.15s;
}

.element-card:hover { border-color: var(--border-strong); }

.element-card--linked {
  display: flex;
  flex-direction: column;
}

.element-link {
  display: inline-block;
  margin-top: 0.75rem;
  font-size: 0.8rem;
  font-family: var(--mono);
  color: var(--accent);
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s;
  align-self: flex-start;
}

.element-link:hover {
  text-decoration: none;
  border-bottom-color: var(--accent);
}

.element-header {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 0.35rem;
}

.element-symbol {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.element-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
}

.element-card p {
  font-size: 0.875rem;
  color: var(--fg-dim);
  line-height: 1.55;
}

/* ----- Code block (pre) ----- */
.code-block {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.1rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--fg);
  overflow-x: auto;
  white-space: pre;
  margin-top: 1rem;
}

.code-block .c { color: var(--muted); }

/* ----- lang note in h2 ----- */
.lang-note {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--muted);
  margin-left: 0.5rem;
}

.lang-note a { color: var(--muted); }
.lang-note a:hover { color: var(--accent); }

/* ----- Commands table ----- */
.commands {
  margin-top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.cmd-row {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 1rem;
  align-items: start;
  padding: 0.75rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
}

@media (max-width: 500px) {
  .cmd-row { grid-template-columns: 1fr; }
}

.cmd-row code { font-size: 0.875rem; }
.cmd-row p { font-size: 0.875rem; margin: 0; }

/* ----- Ecosystem rows ----- */
.eco-rows {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.eco-row {
  display: grid;
  grid-template-columns: 160px 1fr auto;
  gap: 1rem;
  align-items: center;
  padding: 0.85rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
}

@media (max-width: 600px) {
  .eco-row { grid-template-columns: 1fr; }
}

.eco-name {
  font-family: var(--mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--fg);
}

.eco-name a { color: var(--fg); }
.eco-name a:hover { color: var(--accent); text-decoration: none; }
.eco-name-dim { color: var(--fg-dim); }

.eco-desc {
  font-size: 0.85rem;
  color: var(--fg-dim);
  line-height: 1.5;
}

.eco-badges {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.eco-badge {
  display: inline-block;
  font-size: 0.7rem;
  font-family: var(--mono);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.55rem;
  border-radius: 5px;
  border: 1px solid var(--border-strong);
  color: var(--fg-dim);
  background: var(--bg);
  transition: all 0.15s;
  white-space: nowrap;
  text-decoration: none;
}

.eco-badge:hover {
  border-color: var(--primary);
  color: var(--primary);
  text-decoration: none;
}

.eco-badge--lg {
  font-size: 0.8rem;
  padding: 0.3rem 0.8rem;
}