/* =============================================================
   Claude Code: From Zero to Mastery — Main Stylesheet
   Design: Academic-clean, accessible, dark-mode ready
   ============================================================= */

/* ─── Custom Properties ───────────────────────────────────────── */
:root {
  --cc-orange:    #d97706;
  --cc-orange-lt: #fef3c7;
  --cc-blue:      #1d4ed8;
  --cc-blue-lt:   #dbeafe;
  --cc-green:     #15803d;
  --cc-green-lt:  #dcfce7;
  --cc-purple:    #7c3aed;
  --cc-purple-lt: #ede9fe;
  --cc-red:       #dc2626;
  --cc-red-lt:    #fee2e2;

  --bg:           #ffffff;
  --bg-alt:       #f8fafc;
  --bg-card:      #ffffff;
  --border:       #e2e8f0;
  --text:         #0f172a;
  --text-muted:   #64748b;
  --text-inv:     #ffffff;

  --sidebar-w:    280px;
  --header-h:     60px;
  --radius:       10px;
  --shadow:       0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
  --shadow-lg:    0 8px 32px rgba(0,0,0,.12);

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', Consolas, 'Courier New', monospace;
}

/* Dark mode */
[data-theme="dark"] {
  --bg:         #0f172a;
  --bg-alt:     #1e293b;
  --bg-card:    #1e293b;
  --border:     #334155;
  --text:       #f1f5f9;
  --text-muted: #94a3b8;
  --shadow:     0 1px 3px rgba(0,0,0,.3), 0 4px 16px rgba(0,0,0,.25);
  --shadow-lg:  0 8px 32px rgba(0,0,0,.4);
}

/* ─── Reset & Base ─────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  transition: background .2s, color .2s;
  min-height: 100vh;
}
a { color: var(--cc-blue); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }
ul, ol { padding-left: 1.5rem; }

/* ─── Header ───────────────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center;
  padding: 0 1.5rem;
  gap: 1rem;
}
.site-header .logo {
  font-weight: 700; font-size: 1.1rem; color: var(--text);
  display: flex; align-items: center; gap: .5rem;
}
.site-header .logo span { color: var(--cc-orange); }
.header-nav { display: flex; gap: .25rem; margin-left: auto; align-items: center; }
.header-nav a {
  padding: .35rem .75rem; border-radius: 6px;
  font-size: .875rem; color: var(--text-muted); font-weight: 500;
  transition: background .15s, color .15s;
}
.header-nav a:hover, .header-nav a.active { background: var(--bg-alt); color: var(--text); text-decoration: none; }
.btn-menu { display: none; background: none; border: none; cursor: pointer; color: var(--text); padding: .4rem; }

/* ─── Layout ───────────────────────────────────────────────────── */
.layout { display: flex; min-height: calc(100vh - var(--header-h)); }

/* Sidebar */
.sidebar {
  width: var(--sidebar-w); flex-shrink: 0;
  background: var(--bg-alt);
  border-right: 1px solid var(--border);
  position: sticky; top: var(--header-h); height: calc(100vh - var(--header-h));
  overflow-y: auto; padding: 1.25rem 0;
}
.sidebar-section { margin-bottom: .5rem; }
.sidebar-label {
  font-size: .7rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  color: var(--text-muted); padding: .5rem 1.25rem .25rem;
}
.sidebar-link {
  display: flex; align-items: center; gap: .6rem;
  padding: .45rem 1.25rem; font-size: .875rem; color: var(--text-muted);
  border-left: 3px solid transparent; transition: all .15s;
}
.sidebar-link:hover { color: var(--text); background: var(--border); text-decoration: none; }
.sidebar-link.active {
  color: var(--cc-orange); border-left-color: var(--cc-orange);
  background: var(--cc-orange-lt); font-weight: 600;
}
[data-theme="dark"] .sidebar-link.active { background: rgba(217,119,6,.15); }
.sidebar-link .badge {
  margin-left: auto; font-size: .65rem; padding: .1rem .4rem;
  border-radius: 99px; background: var(--cc-green); color: white; font-weight: 700;
}
.sidebar-link .badge.wip { background: var(--cc-orange); }
.sidebar-progress { padding: .5rem 1.25rem 0; }
.progress-bar {
  height: 4px; border-radius: 99px; background: var(--border); overflow: hidden;
}
.progress-fill { height: 100%; background: var(--cc-orange); border-radius: 99px; transition: width .4s; }
.progress-text { font-size: .7rem; color: var(--text-muted); margin-top: .35rem; }

/* Main content */
.main-content { flex: 1; min-width: 0; padding: 2.5rem 3rem; max-width: 900px; }
@media (max-width: 1200px) { .main-content { padding: 2rem 2rem; } }

/* ─── Hero (landing page) ──────────────────────────────────────── */
.hero {
  text-align: center; padding: 5rem 2rem 4rem;
  background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
  color: white; position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(217,119,6,.15) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 30%, rgba(29,78,216,.2) 0%, transparent 60%);
}
.hero > * { position: relative; }
.hero-badge {
  display: inline-block; margin-bottom: 1.5rem;
  padding: .35rem 1rem; border-radius: 99px;
  background: rgba(217,119,6,.2); border: 1px solid rgba(217,119,6,.4);
  font-size: .8rem; font-weight: 600; color: #fcd34d; letter-spacing: .05em;
}
.hero h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 800; line-height: 1.15; margin-bottom: 1.25rem; }
.hero h1 span { color: #fcd34d; }
.hero p { font-size: 1.15rem; color: #94a3b8; max-width: 640px; margin: 0 auto 2.5rem; line-height: 1.7; }
.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: .75rem 1.75rem; border-radius: 8px; font-weight: 600; font-size: .95rem;
  cursor: pointer; transition: all .2s; border: 2px solid transparent;
}
.btn-primary { background: var(--cc-orange); color: white; }
.btn-primary:hover { background: #b45309; color: white; text-decoration: none; transform: translateY(-1px); box-shadow: var(--shadow-lg); }
.btn-secondary { background: transparent; border-color: rgba(255,255,255,.3); color: white; }
.btn-secondary:hover { background: rgba(255,255,255,.1); color: white; text-decoration: none; }
.hero-stats {
  display: flex; gap: 2.5rem; justify-content: center; margin-top: 3.5rem;
  flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat .num { font-size: 2rem; font-weight: 800; color: #fcd34d; }
.hero-stat .label { font-size: .8rem; color: #94a3b8; text-transform: uppercase; letter-spacing: .05em; }

/* ─── Module Grid (landing) ────────────────────────────────────── */
.modules-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem; padding: 3rem 2rem;
  max-width: 1200px; margin: 0 auto;
}
.module-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.5rem; box-shadow: var(--shadow); transition: all .2s;
  display: flex; flex-direction: column; gap: .75rem;
  text-decoration: none; color: var(--text);
  position: relative; overflow: hidden;
}
.module-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--card-accent, var(--cc-orange));
}
.module-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); text-decoration: none; }
.module-card .module-num { font-size: .75rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: .06em; }
.module-card .module-icon { font-size: 2rem; }
.module-card h3 { font-size: 1rem; font-weight: 700; color: var(--text); }
.module-card p { font-size: .85rem; color: var(--text-muted); line-height: 1.55; flex: 1; }
.module-card .module-meta { display: flex; gap: .75rem; align-items: center; font-size: .75rem; color: var(--text-muted); }
.module-card .module-status { margin-left: auto; }
.status-badge {
  font-size: .68rem; font-weight: 700; padding: .2rem .55rem; border-radius: 99px;
  text-transform: uppercase; letter-spacing: .05em;
}
.status-beginner  { background: var(--cc-blue-lt);   color: var(--cc-blue); }
.status-intermediate { background: var(--cc-orange-lt); color: var(--cc-orange); }
.status-advanced  { background: var(--cc-purple-lt); color: var(--cc-purple); }
.done-check { color: var(--cc-green); font-size: .9rem; }

/* ─── Typography ───────────────────────────────────────────────── */
.page-title { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; margin-bottom: .4rem; }
.page-subtitle { color: var(--text-muted); font-size: 1.05rem; margin-bottom: 2rem; }
h2 { font-size: 1.45rem; font-weight: 700; margin: 2.5rem 0 .75rem; color: var(--text); }
h3 { font-size: 1.15rem; font-weight: 700; margin: 2rem 0 .5rem; color: var(--text); }
h4 { font-size: 1rem; font-weight: 700; margin: 1.5rem 0 .4rem; color: var(--text); }
p { margin-bottom: 1rem; }
li { margin-bottom: .3rem; }
strong { font-weight: 700; }
hr { border: none; border-top: 1px solid var(--border); margin: 2.5rem 0; }

/* ─── Callouts ─────────────────────────────────────────────────── */
.callout {
  border-radius: var(--radius); padding: 1.1rem 1.25rem;
  display: flex; gap: .85rem; align-items: flex-start; margin: 1.5rem 0;
  border: 1px solid; font-size: .92rem;
}
.callout-icon { font-size: 1.1rem; flex-shrink: 0; margin-top: .05rem; }
.callout-body { flex: 1; }
.callout-body strong { display: block; margin-bottom: .25rem; font-size: .95rem; }
.callout-tip    { background: var(--cc-blue-lt);   border-color: #93c5fd; color: #1e40af; }
.callout-warn   { background: var(--cc-orange-lt); border-color: #fcd34d; color: #92400e; }
.callout-danger { background: var(--cc-red-lt);    border-color: #fca5a5; color: #991b1b; }
.callout-done   { background: var(--cc-green-lt);  border-color: #86efac; color: #14532d; }
.callout-info   { background: var(--cc-purple-lt); border-color: #c4b5fd; color: #4c1d95; }
[data-theme="dark"] .callout-tip    { background: rgba(29,78,216,.15); border-color: #1d4ed8; color: #93c5fd; }
[data-theme="dark"] .callout-warn   { background: rgba(217,119,6,.15); border-color: #d97706; color: #fcd34d; }
[data-theme="dark"] .callout-danger { background: rgba(220,38,38,.15); border-color: #dc2626; color: #fca5a5; }
[data-theme="dark"] .callout-done   { background: rgba(21,128,61,.15); border-color: #15803d; color: #86efac; }
[data-theme="dark"] .callout-info   { background: rgba(124,58,237,.15); border-color: #7c3aed; color: #c4b5fd; }

/* ─── Code ─────────────────────────────────────────────────────── */
code {
  font-family: var(--font-mono); font-size: .875em;
  background: var(--bg-alt); border: 1px solid var(--border);
  padding: .1em .35em; border-radius: 4px; color: var(--cc-red);
}
[data-theme="dark"] code { color: #f97316; }
pre {
  background: #0f172a; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1.25rem 1.5rem; overflow-x: auto; margin: 1.25rem 0;
  position: relative;
}
[data-theme="dark"] pre { background: #020617; border-color: #1e293b; }
pre code {
  background: none; border: none; padding: 0; color: #e2e8f0;
  font-size: .875rem; line-height: 1.7;
}
.copy-btn {
  position: absolute; top: .6rem; right: .6rem;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.15);
  color: #94a3b8; padding: .25rem .6rem; border-radius: 5px;
  font-size: .72rem; cursor: pointer; font-family: var(--font-sans);
  transition: all .15s;
}
.copy-btn:hover { background: rgba(255,255,255,.2); color: white; }
.copy-btn.copied { background: rgba(21,128,61,.3); color: #86efac; border-color: #15803d; }

/* ─── Tabs (Stata / R / Python / LaTeX) ───────────────────────── */
.tabs { margin: 1.5rem 0; }
.tab-list {
  display: flex; gap: 0; border-bottom: 2px solid var(--border);
  overflow-x: auto; scrollbar-width: none;
}
.tab-list::-webkit-scrollbar { display: none; }
.tab-btn {
  padding: .6rem 1.1rem; font-size: .85rem; font-weight: 600; cursor: pointer;
  background: none; border: none; color: var(--text-muted);
  border-bottom: 2px solid transparent; margin-bottom: -2px;
  transition: all .15s; white-space: nowrap; font-family: var(--font-sans);
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--cc-orange); border-bottom-color: var(--cc-orange); }
.tab-panel { display: none; padding-top: .25rem; }
.tab-panel.active { display: block; }
.tab-lang { display: flex; align-items: center; gap: .4rem; }
.lang-dot {
  width: 8px; height: 8px; border-radius: 50%;
  display: inline-block;
}
.lang-stata  { background: #1a5ba1; }
.lang-r      { background: #276DC2; }
.lang-python { background: #3776AB; }
.lang-latex  { background: #008080; }
.lang-bash   { background: #4a4a4a; }
.lang-json   { background: #7c3aed; }

/* ─── Infographic / Visual blocks ─────────────────────────────── */
.infographic {
  background: var(--bg-alt); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.75rem; margin: 1.75rem 0;
}
.infographic h4 { margin-top: 0; color: var(--text-muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .07em; }
.flow-steps {
  display: flex; gap: 0; align-items: stretch; flex-wrap: wrap; margin-top: 1rem;
}
.flow-step {
  flex: 1; min-width: 130px; background: var(--bg-card);
  border: 1px solid var(--border); padding: 1rem .875rem; text-align: center;
  position: relative;
}
.flow-step:not(:last-child)::after {
  content: '→'; position: absolute; right: -14px; top: 50%; transform: translateY(-50%);
  color: var(--cc-orange); font-size: 1.1rem; font-weight: 700; z-index: 1;
}
.flow-step:first-child { border-radius: var(--radius) 0 0 var(--radius); }
.flow-step:last-child  { border-radius: 0 var(--radius) var(--radius) 0; }
.flow-step .step-icon  { font-size: 1.75rem; margin-bottom: .4rem; }
.flow-step .step-label { font-size: .8rem; font-weight: 700; color: var(--text); }
.flow-step .step-sub   { font-size: .72rem; color: var(--text-muted); margin-top: .2rem; }
@media (max-width: 640px) {
  .flow-steps { flex-direction: column; }
  .flow-step { border-radius: 0; }
  .flow-step:first-child { border-radius: var(--radius) var(--radius) 0 0; }
  .flow-step:last-child  { border-radius: 0 0 var(--radius) var(--radius); }
  .flow-step:not(:last-child)::after { content: '↓'; right: auto; left: 50%; top: auto; bottom: -14px; transform: translateX(-50%); }
}

.compare-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin: 1.25rem 0; }
@media (max-width: 640px) { .compare-grid { grid-template-columns: 1fr; } }
.compare-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.1rem; }
.compare-card h5 { font-size: .8rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; margin-bottom: .6rem; }
.compare-card ul { font-size: .85rem; padding-left: 1.2rem; }
.compare-card ul li { margin-bottom: .3rem; }
.compare-yes h5 { color: var(--cc-green); }
.compare-no  h5 { color: var(--cc-red); }

/* ─── Exercise Block ───────────────────────────────────────────── */
.exercise {
  background: linear-gradient(135deg, var(--cc-purple-lt), var(--cc-blue-lt));
  border: 2px solid var(--cc-purple); border-radius: var(--radius);
  padding: 1.5rem; margin: 2.5rem 0;
}
[data-theme="dark"] .exercise { background: rgba(124,58,237,.12); border-color: rgba(124,58,237,.5); }
.exercise-header { display: flex; align-items: center; gap: .6rem; margin-bottom: 1rem; }
.exercise-header .ex-icon { font-size: 1.4rem; }
.exercise-header h4 { margin: 0; color: var(--cc-purple); font-size: 1rem; }
[data-theme="dark"] .exercise-header h4 { color: #c4b5fd; }
.exercise-task { font-size: .9rem; margin-bottom: .75rem; }
.exercise ol, .exercise ul { font-size: .9rem; }
.exercise-tools { display: flex; gap: .4rem; flex-wrap: wrap; margin-top: 1rem; }
.tool-tag {
  font-size: .72rem; font-weight: 600; padding: .2rem .6rem; border-radius: 99px;
  background: var(--cc-purple); color: white;
}

/* ─── Key Command Table ────────────────────────────────────────── */
.cmd-table { width: 100%; border-collapse: collapse; margin: 1.25rem 0; font-size: .88rem; }
.cmd-table th { text-align: left; padding: .6rem 1rem; background: var(--bg-alt); border-bottom: 2px solid var(--border); font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; color: var(--text-muted); }
.cmd-table td { padding: .6rem 1rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.cmd-table tr:hover td { background: var(--bg-alt); }
.cmd-table code { font-size: .82rem; }
.cmd-table td:first-child { white-space: nowrap; }

/* ─── Accordion (FAQ) ──────────────────────────────────────────── */
.accordion { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin: 1.5rem 0; }
.accordion-item + .accordion-item { border-top: 1px solid var(--border); }
.accordion-btn {
  width: 100%; text-align: left; padding: 1rem 1.25rem;
  background: var(--bg-card); border: none; cursor: pointer;
  font-family: var(--font-sans); font-size: .92rem; font-weight: 600; color: var(--text);
  display: flex; justify-content: space-between; align-items: center;
  transition: background .15s;
}
.accordion-btn:hover { background: var(--bg-alt); }
.accordion-btn .chevron { transition: transform .25s; color: var(--text-muted); }
.accordion-btn[aria-expanded="true"] .chevron { transform: rotate(180deg); }
.accordion-body { display: none; padding: 1rem 1.25rem 1.25rem; font-size: .9rem; background: var(--bg-card); }
.accordion-body.open { display: block; }

/* ─── Module Navigation ────────────────────────────────────────── */
.module-nav {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: 3rem; padding-top: 2rem; border-top: 1px solid var(--border);
}
.module-nav a {
  display: flex; align-items: center; gap: .5rem;
  padding: .65rem 1.2rem; border: 1px solid var(--border); border-radius: 8px;
  font-size: .875rem; font-weight: 600; color: var(--text);
  transition: all .15s;
}
.module-nav a:hover { background: var(--bg-alt); text-decoration: none; border-color: var(--cc-orange); }
.module-nav .nav-label { font-size: .7rem; color: var(--text-muted); display: block; font-weight: 400; }
.complete-btn {
  background: var(--cc-green); color: white; border: none; border-radius: 8px;
  padding: .65rem 1.5rem; font-weight: 600; font-size: .875rem; cursor: pointer;
  font-family: var(--font-sans); display: flex; align-items: center; gap: .5rem;
  transition: all .2s;
}
.complete-btn:hover { background: #166534; transform: translateY(-1px); }
.complete-btn.completed { background: #166534; }

/* ─── Dark mode toggle ─────────────────────────────────────────── */
.theme-toggle {
  background: var(--bg-alt); border: 1px solid var(--border); border-radius: 99px;
  padding: .35rem .75rem; cursor: pointer; font-size: .8rem; color: var(--text);
  display: flex; align-items: center; gap: .4rem; transition: all .15s;
  font-family: var(--font-sans);
}
.theme-toggle:hover { border-color: var(--cc-orange); }

/* ─── Footer ───────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border); padding: 2rem; text-align: center;
  color: var(--text-muted); font-size: .82rem;
  background: var(--bg-alt);
}
.site-footer a { color: var(--text-muted); }
.site-footer a:hover { color: var(--cc-orange); }

/* ─── Section headings with anchor ────────────────────────────── */
.anchor-heading { scroll-margin-top: calc(var(--header-h) + 1rem); }
.anchor-link { color: var(--border); margin-left: .4rem; font-size: .8em; text-decoration: none; }
.anchor-link:hover { color: var(--cc-orange); }

/* ─── TOC (table of contents) ──────────────────────────────────── */
.toc {
  background: var(--bg-alt); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 1rem 1.25rem; margin-bottom: 2.5rem; font-size: .875rem;
}
.toc h4 { margin: 0 0 .75rem; color: var(--text-muted); font-size: .78rem; text-transform: uppercase; letter-spacing: .06em; }
.toc ol { margin: 0; }
.toc li { margin-bottom: .3rem; }
.toc a { color: var(--text-muted); }
.toc a:hover { color: var(--cc-orange); }

/* ─── Responsive / Mobile ──────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar { position: fixed; left: -100%; top: var(--header-h); height: calc(100vh - var(--header-h)); z-index: 99; transition: left .25s; width: min(var(--sidebar-w), 85vw); }
  .sidebar.open { left: 0; box-shadow: var(--shadow-lg); }
  .btn-menu { display: flex; }
  .main-content { padding: 1.5rem 1.25rem; }
  .modules-grid { grid-template-columns: 1fr; padding: 1.5rem 1.25rem; }
  .hero { padding: 3rem 1.5rem 2.5rem; }
  .module-nav { flex-wrap: wrap; gap: .75rem; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 1.75rem; }
  .hero-cta { flex-direction: column; align-items: center; }
}

/* ─── Utility ──────────────────────────────────────────────────── */
.text-center { text-align: center; }
.text-muted   { color: var(--text-muted); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.flex { display: flex; }
.gap-1 { gap: .5rem; }
.items-center { align-items: center; }
.chip {
  display: inline-flex; align-items: center; gap: .3rem;
  font-size: .72rem; font-weight: 600; padding: .2rem .6rem; border-radius: 99px;
  background: var(--bg-alt); border: 1px solid var(--border); color: var(--text-muted);
}
.section-intro { background: var(--bg-alt); border-radius: var(--radius); padding: 1.5rem; margin-bottom: 2rem; }

/* Syntax highlight colors (simple, no library needed) */
.kw  { color: #c792ea; }   /* keyword */
.str { color: #c3e88d; }   /* string */
.num { color: #f78c6c; }   /* number */
.cmt { color: #546e7a; font-style: italic; } /* comment */
.fn  { color: #82aaff; }   /* function */
.op  { color: #89ddff; }   /* operator */