/* CAP — cap-protocol.org */

:root {
  --bg:       #0a0a0a;
  --surface:  #131313;
  --surface-2:#1a1a1a;
  --border:   #262626;
  --border-2: #333;
  --fg:       #f5f5f5;
  --muted:    #a1a1aa;
  --muted-2:  #71717a;
  --accent:   #4ade80;          /* terminal green */
  --accent-2: #60a5fa;          /* link blue */
  --warn:     #fbbf24;
  --danger:   #f87171;

  --mono: 'JetBrains Mono', 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;

  --maxw: 980px;
  --r: 6px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  background-image:
    radial-gradient(circle at 20% 0%, rgba(74,222,128,0.04), transparent 50%),
    radial-gradient(circle at 80% 30%, rgba(96,165,250,0.03), transparent 50%);
  background-attachment: fixed;
}

a {
  color: var(--accent-2);
  text-decoration: none;
  border-bottom: 1px dotted transparent;
  transition: border-color 120ms;
}
a:hover { border-bottom-color: var(--accent-2); }
a.external::after { content: ""; }

code, kbd, pre {
  font-family: var(--mono);
  font-size: 0.92em;
}

code {
  background: var(--surface-2);
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--fg);
}

kbd {
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-bottom-width: 2px;
  border-radius: 3px;
  padding: 0 6px;
  font-size: 0.85em;
}

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 32px 24px 80px;
}

section {
  margin: 64px 0;
}

section h2 {
  font-family: var(--mono);
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
  color: var(--fg);
  position: relative;
  padding-left: 22px;
}
section h2::before {
  content: "§";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 400;
}

p { margin: 0 0 16px; }
p.muted { color: var(--muted); }
.muted { color: var(--muted); }
.small { font-size: 0.88rem; }

em { font-style: normal; color: var(--accent); }

/* ---------- header ---------- */

.site-header {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 22px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border);
}

.brand {
  font-family: var(--mono);
  font-size: 1rem;
  font-weight: 600;
  color: var(--fg);
  border: none;
  letter-spacing: 0.02em;
}
.brand-bracket { color: var(--accent); }
.brand-name { color: var(--fg); }

nav { display: flex; gap: 22px; }
nav a {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--muted);
  border: none;
  transition: color 120ms;
}
nav a:hover { color: var(--fg); }

/* ---------- hero ---------- */

.hero { margin-top: 56px; margin-bottom: 80px; }

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 5px 12px;
  border-radius: 999px;
  margin-bottom: 28px;
}
.status-dot {
  width: 7px;
  height: 7px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--accent);
}

.hero h1 {
  font-family: var(--mono);
  margin: 0 0 16px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
}
.hero-mark {
  display: block;
  font-size: 4.5rem;
  color: var(--fg);
}
.hero-sub {
  display: block;
  font-size: 1.5rem;
  color: var(--accent);
  font-weight: 500;
  margin-top: 6px;
}

.hero-tag {
  font-size: 1.25rem;
  color: var(--fg);
  margin: 16px 0 0;
  max-width: 640px;
}

.hero-lede {
  margin-top: 14px;
  max-width: 680px;
  color: var(--muted);
}

.hero-cta {
  margin-top: 32px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 500;
  padding: 11px 22px;
  border-radius: var(--r);
  border: 1px solid transparent;
  transition: all 120ms;
  cursor: pointer;
  border-bottom: 1px solid transparent;
}
.btn-primary {
  background: var(--accent);
  color: #0a0a0a;
  border-color: var(--accent);
}
.btn-primary:hover {
  background: #5ee892;
  border-color: #5ee892;
}
.btn-ghost {
  color: var(--fg);
  border-color: var(--border-2);
  background: transparent;
}
.btn-ghost:hover {
  border-color: var(--fg);
  background: var(--surface);
}

/* ---------- pitch / sections ---------- */

.pitch p { max-width: 720px; }

/* ---------- stack diagram ---------- */

.diagram {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 18px 20px;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.45;
}
.diagram code {
  background: none;
  border: none;
  padding: 0;
  color: var(--muted);
  white-space: pre;
}
.diagram .hl {
  color: var(--accent);
  font-weight: 600;
}

/* ---------- feature cards ---------- */

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
@media (min-width: 760px) {
  .grid-3 { grid-template-columns: 1fr 1fr 1fr; }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 22px;
  position: relative;
  transition: border-color 120ms, transform 120ms;
}
.card:hover {
  border-color: var(--border-2);
}
.card-num {
  font-family: var(--mono);
  color: var(--accent);
  font-size: 0.85rem;
  margin-bottom: 10px;
}
.card h3 {
  margin: 0 0 12px;
  font-size: 1.05rem;
  font-weight: 600;
  font-family: var(--mono);
  letter-spacing: -0.01em;
}
.card p {
  font-size: 0.95rem;
  color: var(--muted);
  margin: 0 0 12px;
}
.card-foot {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  margin-top: 16px !important;
}

/* ---------- code block (manifest example) ---------- */

.example pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 20px;
  overflow-x: auto;
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--fg);
}
.example pre code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
  white-space: pre;
}

/* TOML-ish syntax colors */
.example .c { color: var(--muted-2); font-style: italic; }
.example .k { color: var(--accent-2); }
.example .p { color: var(--fg); }
.example .s { color: var(--accent); }
.example .n { color: var(--warn); }

/* ---------- spec links ---------- */

.spec-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.spec-list li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 14px 18px;
  margin-bottom: 10px;
}
.spec-list strong { font-family: var(--mono); }

/* ---------- profile table ---------- */

.profile-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
.profile-table th,
.profile-table td {
  text-align: left;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}
.profile-table th {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.profile-table tr:last-child td { border-bottom: none; }
.profile-table code {
  background: var(--surface-2);
}

.badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 3px;
  letter-spacing: 0.04em;
}
.badge-draft    { background: rgba(74,222,128,0.12); color: var(--accent);  border: 1px solid rgba(74,222,128,0.3); }
.badge-reserved { background: var(--surface-2);     color: var(--muted-2); border: 1px solid var(--border); }

/* ---------- timeline ---------- */

.timeline {
  list-style: none;
  padding: 0;
  margin: 0;
}
.timeline li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.timeline li:last-child { border-bottom: none; }
.timeline .dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  margin-top: 9px;
  flex-shrink: 0;
}
.timeline .dot.done   { background: var(--accent);   box-shadow: 0 0 6px var(--accent); }
.timeline .dot.active { background: var(--warn);     box-shadow: 0 0 8px var(--warn); animation: pulse 2s ease-in-out infinite; }
.timeline .dot.todo   { background: var(--border-2); border: 1px solid var(--muted-2); }
.timeline strong { font-family: var(--mono); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.4; }
}

/* ---------- FAQ ---------- */

.faq details {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 0;
  margin-bottom: 10px;
  overflow: hidden;
}
.faq summary {
  cursor: pointer;
  padding: 14px 20px;
  font-family: var(--mono);
  font-size: 0.95rem;
  color: var(--fg);
  user-select: none;
  list-style: none;
  position: relative;
  padding-right: 40px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-size: 1.1rem;
}
.faq details[open] summary::after { content: "−"; }
.faq details > p {
  padding: 0 20px 18px;
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

/* ---------- footer ---------- */

footer {
  border-top: 1px solid var(--border);
  margin-top: 64px;
  padding: 32px 24px;
}
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 18px;
  font-family: var(--mono);
  font-size: 0.85rem;
}

/* ---------- mobile ---------- */

@media (max-width: 640px) {
  .hero-mark { font-size: 3rem; }
  .hero-sub  { font-size: 1.15rem; }
  .hero-tag  { font-size: 1.05rem; }
  .site-header { flex-direction: column; gap: 14px; align-items: flex-start; }
  nav { flex-wrap: wrap; gap: 14px; }
  section { margin: 48px 0; }
  .diagram { font-size: 0.7rem; }
}