/* ============================================================
   x86_64 Register Map
   Same dark palette as the rest of the tool family.
   ============================================================ */

:root {
  --bg:        #0f1115;
  --surface:   #181b22;
  --surface-2: #1f242d;
  --border:    #2a2e38;
  --text:      #e6e8ee;
  --muted:     #8a93a6;
  --accent:    #6ea8ff;

  /* Size-pyramid colors */
  --sz-64: #4ea1ff;
  --sz-32: #38bdf8;
  --sz-16: #facc15;
  --sz-8h: #fb923c;
  --sz-8l: #4ade80;

  /* Caller / callee colors */
  --caller:   #fb923c;
  --callee:   #4ade80;

  --mono: ui-monospace, "Cascadia Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: var(--mono); background: var(--surface-2); padding: 1px 6px; border-radius: 4px; font-size: 0.9em; }
em { color: var(--accent); font-style: normal; }
ul.block-prose { padding-left: 22px; }
ul.block-prose li { margin-bottom: 4px; color: var(--muted); }
ul.block-prose li code { font-size: 0.85em; }

.hero {
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, #11141b 0%, var(--bg) 100%);
}
.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 50px 32px 32px;
}
.hero h1 { font-size: 2.1rem; margin: 0 0 12px; letter-spacing: -0.02em; }
.lede { font-size: 1rem; color: var(--muted); max-width: 820px; }

.block {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 32px;
  border-bottom: 1px solid var(--border);
}
.block-title {
  margin: 0 0 14px;
  font-size: 1.4rem;
  border-left: 4px solid var(--accent);
  padding-left: 12px;
  letter-spacing: -0.01em;
}
.block-prose {
  color: var(--muted);
  max-width: 900px;
  margin: 0 0 14px;
}
.block-prose strong { color: var(--text); }

/* ---------- Size pyramid ---------- */
.pyramid {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 22px;
  margin: 14px 0;
  font-family: var(--mono);
}
.pyramid-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}
.pyramid-label {
  width: 130px;
  text-align: right;
  font-size: 0.82rem;
  color: var(--muted);
}
.pyramid-bar {
  display: flex;
  height: 38px;
  background: #0b0d12;
  border-radius: 4px;
  overflow: hidden;
}
.pyramid-seg {
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.92rem;
  border-right: 1px solid #0b0d12;
}
.pyramid-seg:last-child { border-right: none; }
.pyramid-seg.sz-64 { background: var(--sz-64); color: #0b0d12; }
.pyramid-seg.sz-32 { background: var(--sz-32); color: #0b0d12; }
.pyramid-seg.sz-16 { background: var(--sz-16); color: #0b0d12; }
.pyramid-seg.sz-8h { background: var(--sz-8h); color: #0b0d12; }
.pyramid-seg.sz-8l { background: var(--sz-8l); color: #0b0d12; }
.pyramid-seg.unused { background: #0b0d12; color: var(--muted); border: 1px dashed var(--border); }
.pyramid-note {
  margin-top: 14px;
  font-size: 0.82rem;
  color: var(--muted);
}

/* ---------- Naming grid (small reference under pyramid) ---------- */
.naming-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
  font-family: var(--mono);
  font-size: 0.85rem;
  margin-top: 8px;
}
.naming-grid .nm {
  background: #0b0d12;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.naming-grid .nm .nm-title { font-weight: 700; color: var(--text); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; }
.naming-grid .nm .nm-detail { color: var(--muted); font-size: 0.78rem; }

/* ---------- Register cards grid ---------- */
.reg-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 12px;
}
.reg-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: border-color 0.2s, transform 0.15s;
}
.reg-card:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}
.reg-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}
.reg-name {
  font-family: var(--mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent);
}
.reg-role {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}
.reg-aliases {
  display: flex;
  gap: 5px;
  flex-wrap: wrap;
  font-family: var(--mono);
  font-size: 0.78rem;
}
.alias-badge {
  background: #0b0d12;
  border: 1px solid var(--border);
  padding: 3px 8px;
  border-radius: 4px;
  color: var(--text);
}
.alias-badge .alias-size {
  color: var(--muted);
  font-size: 0.7rem;
  margin-left: 4px;
}
.reg-note {
  font-size: 0.86rem;
  color: var(--text);
  line-height: 1.5;
  border-top: 1px solid var(--border);
  padding-top: 8px;
}
.reg-abi {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 6px 10px;
  font-size: 0.82rem;
  font-family: var(--mono);
  margin-top: 4px;
}
.reg-abi .abi-os { color: var(--muted); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; }
.reg-abi .abi-val { color: var(--text); }
.reg-abi .abi-val .saved-caller { color: var(--caller); font-size: 0.72rem; margin-left: 6px; }
.reg-abi .abi-val .saved-callee { color: var(--callee); font-size: 0.72rem; margin-left: 6px; }

/* ---------- ABI cheatsheet ---------- */
.abi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: 14px;
  margin-top: 12px;
}
.abi-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 18px;
}
.abi-card h3 {
  margin: 0 0 12px;
  font-size: 1rem;
  color: var(--accent);
}
.abi-card .abi-section {
  margin-bottom: 12px;
}
.abi-card .abi-section-h {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
  font-weight: 700;
  margin-bottom: 4px;
}
.abi-card .abi-row {
  font-family: var(--mono);
  font-size: 0.88rem;
}
.abi-card .abi-row.caller-row .reg-list { color: var(--caller); }
.abi-card .abi-row.callee-row .reg-list { color: var(--callee); }
.abi-card .abi-row.args-row  .reg-list { color: var(--text); }
.abi-card .abi-comment {
  margin-top: 10px;
  font-size: 0.85rem;
  color: var(--muted);
  font-family: -apple-system, system-ui, sans-serif;
}

footer {
  text-align: center;
  padding: 30px 20px 60px;
  color: var(--muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
  margin-top: 20px;
}
footer p { max-width: 820px; margin: 0 auto 10px; }
footer .back-link { font-family: var(--mono); }