/* ==========================================================================
   PromptUp Documentation — Styles
   ========================================================================== */

/* ---------- Custom Properties ---------- */
:root {
  --color-bg:          #0d0f17;
  --color-bg-raised:   #141822;
  --color-bg-card:     #1a1f2e;
  --color-bg-code:     #161b28;
  --color-bg-sidebar:  #111520;
  --color-border:      #262d40;
  --color-border-light:#1e2435;

  --color-text:        #e2e8f0;
  --color-text-muted:  #8892a8;
  --color-text-dim:    #5a6480;

  --color-accent:      #7c6aef;
  --color-accent-bright:#a78bfa;
  --gradient-accent:   linear-gradient(135deg, #6366f1, #a855f7);
  --gradient-hero:     linear-gradient(180deg, #0d0f17 0%, #141828 100%);

  --color-green:       #4ade80;
  --color-yellow:      #fbbf24;
  --color-red:         #f87171;
  --color-cyan:        #22d3ee;
  --color-blue:        #60a5fa;
  --color-purple:      #c084fc;

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
               Ubuntu, Cantarell, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono',
               'Cascadia Code', Menlo, Monaco, Consolas, 'Liberation Mono',
               'Courier New', monospace;

  --sidebar-width: 260px;
  --content-max:   820px;
  --header-height: 0px;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;

  --shadow-glow: 0 0 60px rgba(99, 102, 241, .12);
  --shadow-card: 0 2px 12px rgba(0, 0, 0, .25);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ---------- Links ---------- */
a {
  color: var(--color-accent-bright);
  text-decoration: none;
  transition: color .15s;
}
a:hover { color: #c4b5fd; }

/* ---------- Sidebar ---------- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  overflow-y: auto;
  background: var(--color-bg-sidebar);
  border-right: 1px solid var(--color-border-light);
  padding: 32px 0 40px;
  z-index: 100;
  transition: transform .3s ease;
}

.sidebar-brand {
  padding: 0 24px 24px;
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: 16px;
}

.sidebar-brand h2 {
  font-size: 20px;
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.02em;
}

.sidebar-brand .tagline {
  font-size: 12px;
  color: var(--color-text-dim);
  margin-top: 2px;
}

.sidebar nav { padding: 0 12px; }

.sidebar nav a {
  display: block;
  padding: 7px 12px;
  font-size: 13.5px;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: background .15s, color .15s;
  line-height: 1.5;
}

.sidebar nav a:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, .04);
}

.sidebar nav a.active {
  color: var(--color-accent-bright);
  background: rgba(124, 106, 239, .1);
  font-weight: 500;
}

/* ---------- Mobile menu button ---------- */
.menu-toggle {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 200;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  cursor: pointer;
  color: var(--color-text);
  line-height: 1;
}

.menu-toggle svg { display: block; }

.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .55);
  z-index: 90;
}
.overlay.visible { display: block; }

/* ---------- Main content ---------- */
.main {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
}

.content-wrap {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 40px 100px;
}

/* ---------- Hero ---------- */
.hero {
  background: var(--gradient-hero);
  padding: 80px 40px 64px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-border-light);
}

.hero-title {
  font-size: 56px;
  font-weight: 800;
  letter-spacing: -0.04em;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}

.hero-tagline {
  font-size: 22px;
  color: var(--color-text-muted);
  margin-bottom: 8px;
  font-weight: 400;
}

.hero-sub {
  font-size: 15px;
  color: var(--color-text-dim);
  margin-bottom: 40px;
}

.hero-terminal {
  max-width: 640px;
  margin: 0 auto 36px;
  text-align: left;
  background: var(--color-bg-code);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  overflow: hidden;
}

.btn-primary {
  display: inline-block;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: var(--gradient-accent);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: opacity .15s, transform .15s;
  text-decoration: none;
}
.btn-primary:hover { opacity: .9; transform: translateY(-1px); color: #fff; }

/* ---------- Sections ---------- */
section {
  padding-top: 56px;
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
  padding-left: 16px;
  border-left: 3px solid;
  border-image: var(--gradient-accent) 1;
}

.section-intro {
  color: var(--color-text-muted);
  font-size: 16px;
  margin-bottom: 24px;
  line-height: 1.75;
}

/* ---------- Code blocks ---------- */
.code-block {
  background: var(--color-bg-code);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  overflow: hidden;
  position: relative;
}

.code-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, .03);
  border-bottom: 1px solid var(--color-border-light);
}

.code-dots { display: flex; gap: 6px; }
.code-dots span {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.code-dots span:nth-child(1) { background: var(--color-red); }
.code-dots span:nth-child(2) { background: var(--color-yellow); }
.code-dots span:nth-child(3) { background: var(--color-green); }

.code-lang {
  margin-left: auto;
  font-size: 11px;
  color: var(--color-text-dim);
  text-transform: uppercase;
  letter-spacing: .05em;
}

.copy-btn {
  position: absolute;
  top: 8px;
  right: 10px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-dim);
  font-size: 12px;
  padding: 4px 10px;
  cursor: pointer;
  transition: color .15s, background .15s;
  z-index: 2;
}
.copy-btn:hover { color: var(--color-text); background: rgba(255, 255, 255, .1); }
.copy-btn.copied { color: var(--color-green); }

.code-block pre {
  padding: 16px 18px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--color-text);
  tab-size: 4;
}

.code-block code { font-family: inherit; }

/* Inline code */
:not(pre) > code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: rgba(255, 255, 255, .06);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--color-accent-bright);
}

/* Syntax highlighting tokens */
.tok-comment  { color: var(--color-text-dim); font-style: italic; }
.tok-keyword  { color: var(--color-purple); }
.tok-string   { color: var(--color-green); }
.tok-cmd      { color: var(--color-cyan); }
.tok-flag     { color: var(--color-yellow); }
.tok-prompt   { color: var(--color-text-dim); }
.tok-label    { color: var(--color-accent-bright); font-weight: 600; }
.tok-output   { color: var(--color-text-muted); }
.tok-muted    { color: var(--color-text-dim); }

/* ---------- Before / After cards ---------- */
.ba-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.ba-card {
  background: var(--color-bg-code);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.ba-label {
  display: block;
  padding: 8px 14px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  border-bottom: 1px solid var(--color-border-light);
}

.ba-label-you { color: var(--color-text-dim); background: rgba(255, 255, 255, .02); }
.ba-label-up  { color: var(--color-accent-bright); background: rgba(124, 106, 239, .06); }

.ba-body {
  padding: 14px 16px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--color-text);
}

/* ---------- Feature list ---------- */
.feature-list {
  list-style: none;
  display: grid;
  gap: 16px;
  margin-bottom: 24px;
}

.feature-list li {
  padding: 16px 20px;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  transition: border-color .15s;
}
.feature-list li:hover { border-color: var(--color-border); }

.feature-list strong {
  color: var(--color-accent-bright);
}

/* ---------- Tables ---------- */
.table-wrap {
  overflow-x: auto;
  margin-bottom: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

thead th {
  text-align: left;
  padding: 12px 16px;
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .04em;
  color: var(--color-text-muted);
  background: rgba(255, 255, 255, .03);
  border-bottom: 1px solid var(--color-border);
}

tbody td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border-light);
  vertical-align: top;
}

tbody tr:last-child td { border-bottom: none; }
tbody tr:nth-child(even) { background: rgba(255, 255, 255, .015); }
tbody tr:hover { background: rgba(255, 255, 255, .03); }

/* ---------- Subsection headings ---------- */
h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 32px 0 12px;
  color: var(--color-text);
}

h4 {
  font-size: 16px;
  font-weight: 600;
  margin: 24px 0 8px;
  color: var(--color-text-muted);
}

p { margin-bottom: 16px; }

/* ---------- Callout ---------- */
.callout {
  padding: 14px 18px;
  background: rgba(124, 106, 239, .06);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 24px;
  font-size: 14px;
  color: var(--color-text-muted);
}

/* ---------- Flow diagram ---------- */
.flow {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  margin: 32px 0;
}

.flow-node {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 14px 24px;
  font-size: 14px;
  font-weight: 500;
  text-align: center;
  position: relative;
  max-width: 400px;
  width: 100%;
  transition: border-color .2s;
}
.flow-node:hover { border-color: var(--color-accent); }

.flow-node.accent {
  border-color: var(--color-accent);
  background: rgba(124, 106, 239, .08);
}

.flow-arrow {
  width: 2px;
  height: 28px;
  background: var(--color-border);
  position: relative;
}
.flow-arrow::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid var(--color-border);
}

.flow-branch {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  margin: 0;
  max-width: 500px;
  width: 100%;
}

.flow-skip {
  background: var(--color-bg-raised);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: 13px;
  color: var(--color-text-dim);
}

.flow-label {
  font-size: 11px;
  color: var(--color-text-dim);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin: 4px 0;
}

/* ---------- Example cards ---------- */
.example-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
  transition: border-color .2s;
}
.example-card:hover { border-color: var(--color-border); }

.example-card h4 {
  margin-top: 0;
  color: var(--color-text);
}

/* ---------- Footer ---------- */
.footer {
  padding: 40px 0;
  text-align: center;
  border-top: 1px solid var(--color-border-light);
  color: var(--color-text-dim);
  font-size: 13px;
}

.footer a { color: var(--color-text-muted); }
.footer a:hover { color: var(--color-accent-bright); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }

  .menu-toggle { display: block; }

  .main { margin-left: 0; }

  .content-wrap { padding: 0 20px 80px; }

  .hero {
    padding: 80px 20px 48px;
  }
  .hero-title { font-size: 40px; }
  .hero-tagline { font-size: 18px; }

  .ba-grid { grid-template-columns: 1fr; }

  section { padding-top: 40px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 32px; }
  .hero-tagline { font-size: 16px; }
  .section-title { font-size: 22px; }
}