/* ===================================================================
   RLAAS Documentation — Medium-inspired design system
   =================================================================== */

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

:root {
  --font-serif:   'Lora', 'Georgia', 'Cambria', 'Times New Roman', serif;
  --font-sans:    'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', 'Cascadia Code', 'Consolas', monospace;

  --bg:           #ffffff;
  --bg-alt:       #f8f9fa;
  --bg-code:      #f6f8fa;
  --bg-hero:      linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
  --bg-nav:       rgba(255,255,255,.92);

  --text:         #1a1a2e;
  --text-secondary: #555;
  --text-muted:   #888;
  --text-inverse: #f0f0f0;
  --text-link:    #4361ee;

  --accent:       #4361ee;
  --accent-hover: #3a56d4;
  --accent-light: #e8ecfd;
  --accent-glow:  rgba(67,97,238,.15);

  --border:       #e0e0e0;
  --border-light: #eee;

  --shadow-sm:    0 1px 3px rgba(0,0,0,.06);
  --shadow-md:    0 4px 14px rgba(0,0,0,.08);
  --shadow-lg:    0 10px 40px rgba(0,0,0,.1);

  --radius:       8px;
  --radius-lg:    16px;

  --content-width: 780px;
  --wide-width:    1140px;

  --transition:   .2s ease;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: 18px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
}

/* --- Typography ---------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text);
}

h1 { font-size: 2.6rem; margin-bottom: 1rem;   letter-spacing: -.02em; }
h2 { font-size: 2rem;   margin: 2.5rem 0 1rem;  letter-spacing: -.015em; }
h3 { font-size: 1.45rem; margin: 2rem 0 .75rem; }
h4 { font-size: 1.15rem; margin: 1.5rem 0 .5rem; }

p  { margin-bottom: 1.35rem; }
a  { color: var(--text-link); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); text-decoration: underline; }

strong { font-weight: 600; }
em     { font-style: italic; }
code   {
  font-family: var(--font-mono);
  font-size: .88em;
  background: var(--bg-code);
  padding: 2px 6px;
  border-radius: 4px;
}

blockquote {
  border-left: 4px solid var(--accent);
  padding: .5rem 1.25rem;
  margin: 1.5rem 0;
  background: var(--accent-light);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  color: var(--text-secondary);
}

hr {
  border: none;
  border-top: 1px solid var(--border-light);
  margin: 3rem 0;
}

/* --- Lists --------------------------------------------------------- */
ul, ol { padding-left: 1.5rem; margin-bottom: 1.35rem; }
li     { margin-bottom: .35rem; }
li::marker { color: var(--accent); }

/* --- Pre / code blocks --------------------------------------------- */
pre {
  font-family: var(--font-mono);
  font-size: .85rem;
  background: #1e1e2e;
  color: #cdd6f4;
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 1.5rem 0;
  line-height: 1.6;
}
pre code {
  background: transparent;
  padding: 0;
  font-size: inherit;
  color: inherit;
}

/* --- Tables -------------------------------------------------------- */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: .95rem;
}
th, td {
  padding: .75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}
th {
  font-weight: 600;
  background: var(--bg-alt);
  white-space: nowrap;
}
tr:last-child td { border-bottom: none; }

/* ===================================================================
   NAVIGATION
   =================================================================== */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-nav);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  padding: 0 2rem;
}
.nav-inner {
  max-width: var(--wide-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}
.nav-logo span { color: var(--accent); }
.nav-links { display: flex; gap: 1.75rem; list-style: none; padding: 0; margin: 0; }
.nav-links a {
  font-size: .92rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}
.nav-links a:hover,
.nav-links a.active { color: var(--accent); text-decoration: none; }

/* hamburger for mobile */
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-toggle svg { width: 24px; height: 24px; stroke: var(--text); }

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0; right: 0;
    background: var(--bg);
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
    gap: .5rem;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: .5rem 0; }
}

/* ===================================================================
   HERO
   =================================================================== */
.hero {
  background: var(--bg-hero);
  color: var(--text-inverse);
  text-align: center;
  padding: 6rem 2rem 5rem;
}
.hero h1 {
  font-size: 3.2rem;
  color: #fff;
  margin-bottom: .75rem;
  letter-spacing: -.03em;
}
.hero .subtitle {
  font-size: 1.25rem;
  color: rgba(255,255,255,.75);
  max-width: 640px;
  margin: 0 auto 2.5rem;
  line-height: 1.6;
}
.hero-badges {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.hero-badge {
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.18);
  color: #fff;
  padding: .4rem 1rem;
  border-radius: 999px;
  font-size: .82rem;
  font-weight: 500;
  letter-spacing: .03em;
}
.hero-cta {
  display: inline-flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: center;
}
.btn {
  display: inline-block;
  padding: .75rem 1.75rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: .95rem;
  text-decoration: none;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: var(--accent-hover); color: #fff; text-decoration: none; }
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,.35);
}
.btn-outline:hover { border-color: #fff; color: #fff; text-decoration: none; }

/* ===================================================================
   CONTENT WRAPPER
   =================================================================== */
.content {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 3rem 2rem 5rem;
}
.content-wide {
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 3rem 2rem 5rem;
}

/* ===================================================================
   FEATURE CARDS / GRID
   =================================================================== */
.features-section {
  padding: 5rem 2rem;
  background: var(--bg-alt);
}
.features-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 3rem;
}
.features-header h2 { margin-top: 0; }
.features-header p { color: var(--text-secondary); }

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
  max-width: var(--wide-width);
  margin: 0 auto;
}
.feature-card {
  background: var(--bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: box-shadow var(--transition), transform var(--transition);
}
.feature-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 1rem;
}
.feature-card h3 {
  font-family: var(--font-sans);
  font-size: 1.1rem;
  margin: 0 0 .5rem;
}
.feature-card p {
  color: var(--text-secondary);
  font-size: .93rem;
  margin: 0;
  line-height: 1.6;
}

/* ===================================================================
   INFO CARDS (architecture, deployment modes, etc.)
   =================================================================== */
.info-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
  margin: 2rem 0;
}
.info-card {
  background: var(--bg-alt);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
}
.info-card h4 {
  font-family: var(--font-sans);
  margin: 0 0 .5rem;
  color: var(--accent);
}
.info-card p {
  font-size: .92rem;
  color: var(--text-secondary);
  margin: 0;
}

/* ===================================================================
   ALGORITHM / ACTION TAGS
   =================================================================== */
.tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 1rem 0 1.5rem;
}
.tag {
  display: inline-block;
  padding: .3rem .9rem;
  border-radius: 999px;
  font-size: .82rem;
  font-weight: 500;
}
.tag-blue   { background: #e0ecff; color: #1a56db; }
.tag-green  { background: #dcfce7; color: #15803d; }
.tag-amber  { background: #fef3c7; color: #92400e; }
.tag-purple { background: #ede9fe; color: #6d28d9; }
.tag-red    { background: #ffe4e6; color: #be123c; }
.tag-gray   { background: #f1f5f9; color: #475569; }

/* ===================================================================
   CODE EXAMPLE TABS
   =================================================================== */
.code-tabs {
  margin: 2rem 0;
}
.code-tab-bar {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border-light);
  margin-bottom: -2px;
  position: relative;
  z-index: 1;
}
.code-tab-btn {
  background: none;
  border: none;
  padding: .6rem 1.25rem;
  font-size: .88rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all var(--transition);
}
.code-tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.code-tab-content { display: none; }
.code-tab-content.active { display: block; }

/* ===================================================================
   ENDPOINT TABLE
   =================================================================== */
.endpoint-table {
  margin: 1.5rem 0;
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  overflow: hidden;
}
.endpoint-table table { margin: 0; }
.endpoint-table th { background: var(--bg-alt); }
.endpoint-method {
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 700;
  padding: .2rem .5rem;
  border-radius: 4px;
  display: inline-block;
}
.method-get    { background: #dcfce7; color: #15803d; }
.method-post   { background: #e0ecff; color: #1a56db; }
.method-put    { background: #fef3c7; color: #92400e; }
.method-delete { background: #ffe4e6; color: #be123c; }

.endpoint-path {
  font-family: var(--font-mono);
  font-size: .88rem;
}

/* ===================================================================
   ARCHITECTURE DIAGRAM
   =================================================================== */
.arch-diagram {
  background: var(--bg-alt);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  margin: 2rem 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: .85rem;
  overflow-x: auto;
  white-space: pre;
  line-height: 1.65;
  color: var(--text-secondary);
}

/* ===================================================================
   SIDEBAR LAYOUT (for design doc)
   =================================================================== */
.layout-with-sidebar {
  display: grid;
  grid-template-columns: 240px 1fr;
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 0 2rem;
  gap: 3rem;
}
.sidebar {
  position: sticky;
  top: 80px;
  align-self: start;
  padding: 2rem 0;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
}
.sidebar h4 {
  font-family: var(--font-sans);
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
  margin-bottom: .75rem;
}
.sidebar ul { list-style: none; padding: 0; margin: 0 0 1.5rem; }
.sidebar li { margin-bottom: .2rem; }
.sidebar a {
  display: block;
  padding: .3rem .75rem;
  font-size: .87rem;
  color: var(--text-secondary);
  border-radius: 6px;
  text-decoration: none;
  transition: all var(--transition);
}
.sidebar a:hover { background: var(--accent-light); color: var(--accent); text-decoration: none; }
.sidebar a.active { background: var(--accent-light); color: var(--accent); font-weight: 500; }

.main-content {
  padding: 3rem 0 5rem;
  min-width: 0;
}

@media (max-width: 900px) {
  .layout-with-sidebar { grid-template-columns: 1fr; padding: 0 1.5rem; }
  .sidebar { display: none; }
}

/* ===================================================================
   SECTION DIVIDER
   =================================================================== */
.section-divider {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ===================================================================
   README SECTION
   =================================================================== */
.readme-section {
  background: var(--bg-alt);
  padding: 4rem 2rem;
}
.readme-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  background: var(--bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 3rem;
  box-shadow: var(--shadow-sm);
}

/* ===================================================================
   FOOTER
   =================================================================== */
.footer {
  background: #1a1a2e;
  color: rgba(255,255,255,.6);
  padding: 3rem 2rem;
  text-align: center;
  font-size: .88rem;
}
.footer a { color: var(--accent); }
.footer-inner {
  max-width: var(--wide-width);
  margin: 0 auto;
}
.footer-links {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
  list-style: none;
  padding: 0;
}

/* ===================================================================
   SCROLL TO TOP
   =================================================================== */
.scroll-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: translateY(10px);
  transition: all .3s ease;
  z-index: 50;
}
.scroll-top.visible { opacity: 1; transform: translateY(0); }
.scroll-top:hover { background: var(--accent-hover); }

/* ===================================================================
   BREADCRUMB
   =================================================================== */
.breadcrumb {
  font-size: .85rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}
.breadcrumb a { color: var(--text-secondary); }

/* ===================================================================
   CALLOUT / NOTE BOXES
   =================================================================== */
.callout {
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  font-size: .93rem;
}
.callout-info    { background: #eff6ff; border-left: 4px solid #3b82f6; }
.callout-warning { background: #fffbeb; border-left: 4px solid #f59e0b; }
.callout-tip     { background: #f0fdf4; border-left: 4px solid #22c55e; }
.callout strong  { display: block; margin-bottom: .25rem; }

/* ===================================================================
   DOC LAYOUT (providers page)
   =================================================================== */
.doc-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 0 2rem;
  gap: 3rem;
}
.doc-sidebar {
  position: sticky;
  top: 80px;
  align-self: start;
  padding: 2rem 0;
  max-height: calc(100vh - 100px);
  overflow-y: auto;
}
.doc-sidebar h4 {
  font-family: var(--font-sans);
  font-size: .75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-muted);
  margin-bottom: .75rem;
}
.doc-sidebar ul { list-style: none; padding: 0; margin: 0 0 1.5rem; }
.doc-sidebar li { margin-bottom: .2rem; }
.doc-sidebar a {
  display: block;
  padding: .3rem .75rem;
  font-size: .87rem;
  color: var(--text-secondary);
  border-radius: 6px;
  text-decoration: none;
  transition: all var(--transition);
}
.doc-sidebar a:hover { background: var(--accent-light); color: var(--accent); text-decoration: none; }
.doc-sidebar a.active { background: var(--accent-light); color: var(--accent); font-weight: 500; }

.doc-content {
  padding: 3rem 0 5rem;
  min-width: 0;
}

@media (max-width: 900px) {
  .doc-layout { grid-template-columns: 1fr; padding: 0 1.5rem; }
  .doc-sidebar { display: none; }
}

/* ===================================================================
   INFO-CARD GRID (providers page)
   =================================================================== */
.info-card-grid {
  display: grid;
  gap: 1rem;
  margin: 1.5rem 0;
}
.info-card-grid .info-card {
  text-align: center;
  padding: 1.25rem 1rem;
}
.info-card-title {
  font-family: var(--font-sans);
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted);
  margin-bottom: .35rem;
}
.info-card-value {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
}
.info-card-value code {
  font-size: .88rem;
  background: var(--accent-light);
  padding: .15rem .4rem;
  border-radius: 4px;
}

/* ===================================================================
   UTILITIES
   =================================================================== */
.text-center  { text-align: center; }
.text-muted   { color: var(--text-secondary); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

/* print */
@media print {
  .nav, .footer, .scroll-top, .sidebar, .doc-sidebar { display: none; }
  .hero { background: #333; -webkit-print-color-adjust: exact; }
}