/* ── Reset & base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:           #0f1117;
  --bg-card:      #1a1d27;
  --bg-json:      #10131a;
  --border:       #2a2d3a;
  --text:         #e2e4ed;
  --text-muted:   #7a7f94;
  --accent:       #2dd4bf;
  --accent-dim:   #1a8a7a;
  --red:          #f87171;
  --red-bg:       #2d1515;
  --yellow:       #fbbf24;
  --yellow-bg:    #2d2210;
  --blue:         #60a5fa;
  --blue-bg:      #111e30;
  --font-sans:    'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', monospace;
  --max-width:    860px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ── Nav ── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 17, 23, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  height: 56px;
  display: flex;
  align-items: center;
}

.nav-wordmark {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}

.nav-by {
  font-weight: 400;
  color: var(--text-muted);
  margin-left: 0.4rem;
  font-size: 0.9rem;
}

/* ── Sections ── */
section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 2rem;
}

section + section {
  border-top: 1px solid var(--border);
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
  color: var(--text);
}

p { color: var(--text-muted); }
p + p { margin-top: 1rem; }

/* ── Hero ── */
.hero { padding-top: 3rem; padding-bottom: 2rem; }

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1.75rem;
  color: var(--text);
}

.hero-sub {
  font-size: 1.05rem;
  max-width: 680px;
  margin-bottom: 1.25rem;
}

.hero-mission {
  font-size: 1.05rem;
  max-width: 680px;
  color: var(--accent);
  opacity: 0.9;
}

/* ── Revisions ── */
.revisions-sub {
  margin-bottom: 2.5rem;
  max-width: 640px;
}

/* ── Card ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 1.25rem;
  overflow: hidden;
  transition: border-color 0.2s;
}

.card:hover { border-color: #3a3d4e; }

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  cursor: pointer;
  user-select: none;
  gap: 1rem;
}

.card-header-left { flex: 1; min-width: 0; }

.card-revisions {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text);
  font-weight: 500;
  margin-bottom: 0.35rem;
}

.card-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
}

.card-badges {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
}

.badge-critical { background: var(--red-bg);    color: var(--red);    }
.badge-warning  { background: var(--yellow-bg); color: var(--yellow); }
.badge-info     { background: var(--blue-bg);   color: var(--blue);   }

.card-summary {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.6rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-toggle {
  font-size: 0.78rem;
  color: var(--accent);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-shrink: 0;
}

.card-toggle-icon {
  transition: transform 0.2s;
  display: inline-block;
}

.card.open .card-toggle-icon { transform: rotate(180deg); }

/* ── JSON block ── */
.card-body {
  display: none;
  border-top: 1px solid var(--border);
}

.card.open .card-body { display: block; }

.json-wrapper {
  position: relative;
}

.copy-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: #2a2d3a;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.72rem;
  padding: 0.25rem 0.65rem;
  border-radius: 5px;
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
  z-index: 2;
}

.copy-btn:hover { color: var(--text); background: #33364a; }
.copy-btn.copied { color: var(--accent); }

pre.json-block {
  background: var(--bg-json);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.6;
  padding: 1.25rem 1.5rem;
  max-height: 420px;
  overflow-y: auto;
  overflow-x: auto;
  white-space: pre;
  scrollbar-width: thin;
  scrollbar-color: #2a2d3a transparent;
}

pre.json-block::-webkit-scrollbar { width: 6px; height: 6px; }
pre.json-block::-webkit-scrollbar-thumb { background: #2a2d3a; border-radius: 3px; }

/* JSON syntax highlighting */
.json-key     { color: #7dd3fc; }
.json-string  { color: #86efac; }
.json-number  { color: #fca5a5; }
.json-bool    { color: #f0abfc; }
.json-null    { color: #94a3b8; }

/* ── How it works ── */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  margin-top: 0.5rem;
}

.step { }

.step-number {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
  letter-spacing: 0.05em;
}

.step h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.step p { font-size: 0.9rem; }

/* ── Founder ── */
.founder-card {
  display: flex;
  align-items: flex-start;
  gap: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 2rem;
}

.founder-photo {
  flex-shrink: 0;
  width: 88px;
  height: 88px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--border);
}

.founder-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 20%;
  display: block;
}

.founder-photo-placeholder {
  display: none;
  width: 100%;
  height: 100%;
  background: #1e2235;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--accent);
}

.founder-info h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.2rem;
}

.founder-title {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.75rem;
}

.founder-bio {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.linkedin-link {
  font-size: 0.85rem;
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.15s;
}

.linkedin-link:hover { opacity: 0.75; }

/* ── CTA ── */
.cta { text-align: center; }
.cta h2 { margin-bottom: 0.75rem; }
.cta > p { margin-bottom: 2rem; }

.cta-form {
  display: flex;
  gap: 0.75rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.cta-form input {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  padding: 0.65rem 1rem;
  width: 280px;
  outline: none;
  transition: border-color 0.2s;
}

.cta-form input:focus { border-color: var(--accent); }
.cta-form input::placeholder { color: var(--text-muted); }

.cta-form button {
  background: var(--accent);
  border: none;
  border-radius: 7px;
  color: #0f1117;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.65rem 1.4rem;
  cursor: pointer;
  transition: opacity 0.15s;
}

.cta-form button:hover { opacity: 0.85; }

.cta-note { font-size: 0.78rem; color: var(--text-muted); }

/* ── Footer ── */
footer {
  border-top: 1px solid var(--border);
  padding: 1.75rem 2rem;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ── Responsive ── */
@media (max-width: 600px) {
  .founder-card { flex-direction: column; }
  .card-header { flex-direction: column; align-items: flex-start; }
  .card-toggle { align-self: flex-end; }
}