/* ────────────────────────────────────────────────── */
/* NAN ELMOTH — Documentation Theme                   */
/* ────────────────────────────────────────────────── */

/* ── reset ────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; overflow-x: hidden; -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body { overflow-x: hidden; }

/* ── custom properties ────────────────────────────── */
:root {
  /* colors */
  --color-moss-0: #0a120c;
  --color-moss-1: #131e15;
  --color-moss-2: #1d2c1e;
  --color-moss-3: #2a3a2a;
  --color-bark-1: #2a1f15;
  --color-bark-2: #3d2d1e;
  --color-bark-3: #5a4228;
  --color-cream-0: #f1e8d0;
  --color-cream-1: #ddd0a8;
  --color-cream-2: #b6a878;
  --color-silver: #a9b8a3;
  --color-moonlight: #d4dccd;
  --color-rose: #c98a6a;

  /* fonts */
  --font-display: "Sorts Mill Goudy", Georgia, serif;
  --font-body: "Atkinson Hyperlegible", -apple-system, system-ui, sans-serif;
  --font-label: "Cormorant Upright", "Cormorant Garamond", serif;

  /* layout */
  --sidebar-width: 240px;
  --content-max-width: 720px;
}

/* ── base ─────────────────────────────────────────── */
html, body {
  height: 100%;
  background: var(--color-moss-0);
  color: var(--color-cream-1);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.7;
}

a {
  color: var(--color-rose);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ────────────────────────────────────────────────── */
/* ATMOSPHERE — tuned for long-form reading           */
/* ────────────────────────────────────────────────── */

.atm-root {
  position: relative;
  isolation: isolate;
  min-height: 100vh;
  overflow-x: clip;
}

.atm-canopy,
.atm-bark,
.atm-mist {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

.atm-canopy {
  z-index: -3;
  background:
    radial-gradient(ellipse 90% 60% at 30% -10%, rgba(80,90,40,0.18), transparent 60%),
    radial-gradient(ellipse 70% 50% at 80% 110%, rgba(20,40,20,0.30), transparent 60%),
    radial-gradient(ellipse 60% 40% at 5% 60%, rgba(15,25,15,0.36), transparent 70%),
    linear-gradient(170deg, var(--color-moss-1) 0%, var(--color-moss-0) 50%, var(--color-moss-1) 100%);
}

.atm-bark {
  z-index: -2;
  opacity: 0.12;
  background-image:
    repeating-linear-gradient(95deg,
      transparent 0, transparent 60px,
      rgba(60,40,20,0.5) 60px, rgba(60,40,20,0.5) 61px,
      transparent 61px, transparent 130px,
      rgba(40,30,15,0.4) 130px, rgba(40,30,15,0.4) 131px),
    repeating-linear-gradient(2deg,
      transparent 0, transparent 90px,
      rgba(70,50,25,0.3) 90px, rgba(70,50,25,0.3) 92px);
}

.atm-mist {
  z-index: -1;
  background: radial-gradient(ellipse 60% 40% at 20% 80%, rgba(180,200,180,0.10), transparent 60%);
  animation: atm-mist-drift 120s ease-in-out infinite alternate;
}

@keyframes atm-mist-drift {
  from { transform: translate3d(-30px, 0, 0); }
  to   { transform: translate3d(30px, -10px, 0); }
}

.atm-leaf {
  position: fixed;
  top: -20px;
  width: 14px;
  height: 18px;
  border-radius: 0 100% 0 100%;
  transform: rotate(45deg);
  opacity: 0.25;
  z-index: -1;
  pointer-events: none;
  animation: atm-fall linear infinite;
}
.atm-leaf.l1 { left: 15%; animation-duration: 28s; animation-delay: -4s;  background: var(--color-bark-3); }
.atm-leaf.l2 { left: 45%; animation-duration: 35s; animation-delay: -12s; background: var(--color-cream-2); }
.atm-leaf.l3 { left: 75%; animation-duration: 32s; animation-delay: -8s;  background: var(--color-rose); opacity: 0.18; }
.atm-leaf.l4 { left: 30%; animation-duration: 40s; animation-delay: -20s; background: var(--color-bark-3); opacity: 0.20; }

@keyframes atm-fall {
  0%   { transform: rotate(45deg)  translateX(0)    translateY(0); }
  50%  { transform: rotate(225deg) translateX(40px) translateY(55vh); }
  100% { transform: rotate(405deg) translateX(-20px) translateY(calc(110vh + 20px)); }
}

.atm-grain {
  position: fixed;
  inset: 0;
  z-index: 100;
  pointer-events: none;
  opacity: 0.06;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

@media (prefers-reduced-motion: reduce) {
  .atm-mist { animation: none; }
  .atm-leaf { animation: none; display: none; }
}

/* ────────────────────────────────────────────────── */
/* LAYOUT — sidebar + content                         */
/* ────────────────────────────────────────────────── */

.site-layout {
  display: flex;
  min-height: 100vh;
}

/* ── sidebar ──────────────────────────────────────── */

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: rgba(19,30,21,0.85);
  backdrop-filter: blur(8px);
  border-right: 1px solid var(--color-bark-3);
  padding: 24px 0;
  overflow-y: auto;
  z-index: 10;
  scrollbar-width: thin;
  scrollbar-color: var(--color-bark-3) transparent;
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-track { background: transparent; }
.sidebar::-webkit-scrollbar-thumb { background: var(--color-bark-3); border-radius: 2px; }

.sidebar-header {
  padding: 0 20px 20px;
  border-bottom: 1px solid var(--color-bark-3);
  margin-bottom: 16px;
}
.sidebar-header a {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 22px;
  color: var(--color-cream-0);
  text-decoration: none;
}
.sidebar-header a:hover { text-decoration: none; }

.sidebar-section {
  margin-bottom: 8px;
}

.sidebar-section-title {
  font-family: var(--font-label);
  font-variant: small-caps;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--color-cream-2);
  padding: 8px 20px 4px;
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  gap: 6px;
}
.sidebar-section-title::before {
  content: "▸";
  font-size: 8px;
  transition: transform 200ms ease;
}
.sidebar-section.expanded .sidebar-section-title::before {
  transform: rotate(90deg);
}

.sidebar-section-links {
  display: none;
  padding: 2px 0;
}
.sidebar-section.expanded .sidebar-section-links {
  display: block;
}

.sidebar-link {
  display: block;
  padding: 4px 20px 4px 24px;
  font-size: 13px;
  color: var(--color-cream-2);
  text-decoration: none;
  transition: color 200ms, background 200ms;
}
.sidebar-link:hover {
  color: var(--color-cream-1);
  text-decoration: none;
}
.sidebar-link.active {
  color: var(--color-cream-0);
  background: rgba(201,138,106,0.08);
  border-left: 2px solid var(--color-rose);
  padding-left: 22px;
}
.sidebar-link.chapter {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 13px;
}

.sidebar-footer {
  padding: 16px 20px 0;
  margin-top: auto;
  border-top: 1px solid var(--color-bark-3);
}
.sidebar-footer a {
  font-size: 12px;
  color: var(--color-cream-2);
}

/* ── content ──────────────────────────────────────── */

.content-area {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-width: 0;
  padding: 40px 48px 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.content-wrapper {
  width: 100%;
  max-width: var(--content-max-width);
  overflow-wrap: break-word;
  word-wrap: break-word;
}

/* ── breadcrumb ───────────────────────────────────── */

.breadcrumb {
  margin-bottom: 8px;
  font-size: 12px;
}
.breadcrumb-section {
  font-family: var(--font-label);
  font-variant: small-caps;
  letter-spacing: 0.1em;
  color: var(--color-cream-2);
}
.breadcrumb-sep {
  color: var(--color-bark-3);
  margin: 0 6px;
}
.breadcrumb-page {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--color-cream-1);
}

/* ── page header ──────────────────────────────────── */

.page-title {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 32px;
  color: var(--color-cream-0);
  margin-bottom: 16px;
  line-height: 1.2;
}

.page-intro {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-cream-0);
  border-left: 2px solid var(--color-rose);
  padding-left: 18px;
  margin-bottom: 32px;
  position: relative;
}
.page-intro::after {
  content: "";
  position: absolute;
  left: -2px;
  top: 0;
  bottom: 0;
  width: 8px;
  background: radial-gradient(ellipse 100% 50% at 0% 50%, rgba(201,138,106,0.20), transparent 70%);
  filter: blur(6px);
  pointer-events: none;
}

/* ── markdown content ─────────────────────────────── */

.doc-content h2,
.doc-content h3,
.doc-content h4 {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--color-cream-0);
  margin-top: 2em;
  margin-bottom: 0.5em;
  line-height: 1.3;
}
.doc-content h2 { font-size: 1.4em; border-bottom: 1px solid var(--color-bark-3); padding-bottom: 0.3em; }
.doc-content h3 { font-size: 1.15em; }
.doc-content h4 { font-size: 1em; }

.doc-content p { margin-bottom: 0.8em; }

.doc-content strong {
  color: var(--color-cream-0);
  font-weight: 700;
}

.doc-content a {
  color: var(--color-rose);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.doc-content a:hover { color: var(--color-cream-0); }

.doc-content code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  font-size: 0.875em;
  background: color-mix(in srgb, var(--color-moss-2) 40%, transparent);
  color: var(--color-cream-0);
  padding: 0.15em 0.4em;
  border-radius: 3px;
}

.doc-content pre {
  margin: 1em 0;
  padding: 16px 20px;
  background: var(--color-moss-1);
  border: 1px solid var(--color-bark-3);
  border-radius: 4px;
  overflow-x: auto;
}
.doc-content pre code {
  background: none;
  padding: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-cream-1);
}

.doc-content blockquote {
  border-left: 2px solid var(--color-rose);
  padding-left: 16px;
  margin: 1em 0;
  color: var(--color-cream-2);
  font-style: italic;
}

.doc-content ul,
.doc-content ol {
  padding-left: 1.5em;
  margin: 0.6em 0;
}
.doc-content ul { list-style-type: disc; }
.doc-content ol { list-style-type: decimal; }
.doc-content li { margin-bottom: 0.3em; }
.doc-content li::marker { color: var(--color-rose); }

.doc-content table {
  border-collapse: collapse;
  margin: 1em 0;
  width: 100%;
  font-size: 0.9em;
  display: block;
  overflow-x: auto;
}
.doc-content th,
.doc-content td {
  border: 1px solid var(--color-bark-3);
  padding: 8px 12px;
  text-align: left;
}
.doc-content th {
  background: color-mix(in srgb, var(--color-moss-2) 40%, transparent);
  font-weight: 600;
  color: var(--color-cream-0);
}
.doc-content tr:nth-child(even) td {
  background: color-mix(in srgb, var(--color-moss-2) 15%, transparent);
}

.doc-content hr {
  border: none;
  border-top: 1px solid var(--color-bark-3);
  margin: 2em 0;
}

.doc-content img {
  max-width: 100%;
  border-radius: 4px;
}

/* ── page nav (prev/next) ─────────────────────────── */

.page-nav {
  display: flex;
  justify-content: space-between;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--color-bark-3);
}
.page-nav-link {
  text-decoration: none;
}
.page-nav-label {
  font-family: var(--font-body);
  font-size: 11px;
  color: var(--color-cream-2);
}
.page-nav-title {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 14px;
  color: var(--color-cream-1);
}
.page-nav-link:hover .page-nav-title {
  color: var(--color-rose);
}
.page-nav-next {
  text-align: right;
}

/* ────────────────────────────────────────────────── */
/* MOBILE — sidebar collapse                          */
/* ────────────────────────────────────────────────── */

.mobile-header {
  display: none;
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 300ms ease;
    z-index: 50;
  }
  .sidebar.open {
    transform: translateX(0);
  }

  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(10,18,12,0.7);
    z-index: 40;
  }
  .sidebar-overlay.visible {
    display: block;
  }

  .content-area {
    margin-left: 0;
    padding: 20px 20px 60px;
  }

  .mobile-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    border-bottom: 1px solid var(--color-bark-3);
    background: rgba(19,30,21,0.85);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 30;
  }
  .mobile-header-title {
    font-family: var(--font-display);
    font-style: italic;
    font-size: 18px;
    color: var(--color-cream-0);
  }
  .hamburger {
    background: none;
    border: none;
    color: var(--color-cream-1);
    font-size: 20px;
    cursor: pointer;
    padding: 4px;
  }
}