:root[data-theme="light"] {
  --bg: #ffffff;
  --fg: #2b2c30;
  --muted: #6b6f76;
  --border: rgba(0, 22, 22, 0.12);
  --accent: #2563eb;
  --accent-weak: rgba(37, 99, 235, 0.1);
  --code-bg: #f7f7f7;
  --kbd-bg: #f1f5f9;
}

:root[data-theme="dark"] {
  --bg: #0b0c10;
  --fg: #e5e7eb;
  --muted: #9aa1aa;
  --border: rgba(255, 255, 255, 0.08);
  --accent: #60a5fa;
  --accent-weak: rgba(96, 165, 250, 0.12);
  --code-bg: #0f172a;
  --kbd-bg: #111827;
}
}

html,
body {
  height: 100%;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  color: var(--fg);
  background: var(--bg);
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Inter,
    "Helvetica Neue", Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

/* Layout */
.layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  min-height: 100vh;
}
nav#navbar {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  overflow: auto;
  border-right: 1px solid var(--border);
  background: var(--bg);
}
#brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 1rem 0.5rem;
}
#brand h1 {
  font-size: 1.05rem;
  margin: 0;
  font-weight: 700;
  letter-spacing: 0.2px;
}
#brand small {
  color: var(--muted);
  font-weight: 500;
}

.nav-search {
  padding: 0.25rem 1rem 1rem;
}
.nav-search input {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: var(--bg);
  color: var(--fg);
}

#navbar ul {
  list-style: none;
  margin: 0;
  padding: 0 0.25rem 2rem;
}
#navbar li {
  border-top: 1px solid var(--border);
}
#navbar a.nav-link {
  display: block;
  padding: 0.65rem 1rem;
  color: var(--fg);
  text-decoration: none;
}
#navbar a.nav-link:hover {
  background: var(--accent-weak);
}
#navbar a.active {
  color: var(--accent);
  font-weight: 600;
  border-left: 3px solid var(--accent);
  background: var(--accent-weak);
}

/* Content */
main#main-doc {
  padding: 2rem 2.5rem;
}
section.main-section {
  padding: 0 0 3rem;
}
section.main-section > header {
  font-size: 1.6rem;
  font-weight: 800;
  margin: 0 0 0.75rem;
}
section article {
  color: var(--fg);
  margin: 0 0 1rem;
  font-size: 1rem;
}
section p {
  margin: 0.5rem 0;
}
section ul {
  margin: 0.5rem 0 1rem 1.25rem;
}

/* Cards & callouts */
.callout {
  border: 1px solid var(--border);
  border-radius: 0.75rem;
  padding: 1rem;
  background: transparent;
}
.callout.info {
  border-color: var(--accent);
  background: var(--accent-weak);
}

/* Code */
code,
pre,
kbd {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", monospace;
}
pre,
code.block {
  display: block;
  white-space: pre;
  overflow: auto;
  line-height: 1.6;
  background: var(--code-bg);
  padding: 1rem;
  border-radius: 0.75rem;
  margin: 0.75rem 0;
  border: 1px solid var(--border);
}
code.inline {
  background: var(--code-bg);
  padding: 0.15rem 0.35rem;
  border-radius: 0.35rem;
}
kbd {
  background: var(--kbd-bg);
  border: 1px solid var(--border);
  padding: 0.1rem 0.35rem;
  border-radius: 0.35rem;
  font-size: 0.9em;
}

/* Header bar */
.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  backdrop-filter: saturate(180%) blur(6px);
  background: color-mix(in oklab, var(--bg) 85%, transparent);
  border-bottom: 1px solid var(--border);
  padding: 0.5rem 1rem;
  display: flex;
  gap: 0.5rem;
  align-items: center;
}
.topbar .crumbs {
  color: var(--muted);
  font-size: 0.9rem;
}
.topbar .spacer {
  flex: 1;
}
.btn {
  border: 1px solid var(--border);
  background: transparent;
  color: var(--fg);
  border-radius: 0.6rem;
  padding: 0.45rem 0.7rem;
  cursor: pointer;
}
.btn:hover {
  background: var(--accent-weak);
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  color: var(--muted);
}

/* Mobile */
@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
  }
  nav#navbar {
    position: relative;
    height: auto;
  }
   /* Code wrapping fix for mobile */
  pre, code {
    white-space: pre-wrap !important;
    word-break: break-word;
    font-size: 0.9em;     /* optional: slightly smaller */
    padding: 0.5em;       /* optional: breathing room */
  }
}
form {
  margin-top: 1.5em;
  padding: 1.5em;
  background: #f8fafc;
  border: 1px solid #e2e8f0;
  border-radius: 12px;
  max-width: 600px;
  box-sizing: border-box; /* ensures padding is included */
}

form label {
  font-weight: 600;
  display: block;
  margin: 1em 0 0.5em;
}

form input,
form textarea {
  width: 100%;
  padding: 0.75em;
  border: 1px solid #cbd5e1;
  border-radius: 6px;
  font-size: 1rem;
  box-sizing: border-box; /* fixes right-side flush issue */
}

form textarea {
  resize: vertical;
  min-height: 100px;
}

form button {
  display: inline-block;
  margin-top: 1em;
  padding: 0.75em 1.25em;
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

form button:hover {
  background: #1e40af;
}
.contact-form {
  background: #fafafa;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
  max-width: 600px;
}

.contact-form label {
  display: block;
  margin-top: 1rem;
  font-weight: 600;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  margin-top: 0.5rem;
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 1rem;
}

.btn-submit {
  margin-top: 1.5rem;
  background: #2563eb;
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  cursor: pointer;
}
.btn-submit:hover {
  background: #1d4ed8;
}