/* ========================================
   RaQuet Website Styles
   A clean, technical, professional design
   ======================================== */

/* CSS Variables */
:root {
  /* Colors - CARTO-inspired palette */
  --color-primary: #162945;        /* Deep navy - header bg */
  --color-primary-light: #1e3a5f;  /* Lighter navy */
  --color-accent: #36B3A8;         /* CARTO teal */
  --color-accent-light: #4dd4c8;   /* Light teal */
  --color-accent-dark: #2a8f86;    /* Dark teal */
  --color-highlight: #F2994A;      /* Warm orange */
  --color-bg: #fafbfc;             /* Light background */
  --color-bg-alt: #f0f2f5;         /* Alternate bg */
  --color-text: #1a1a2e;           /* Main text */
  --color-text-light: #5a6270;     /* Secondary text */
  --color-border: #e1e5eb;         /* Borders */
  --color-code-bg: #1e2433;        /* Code block bg */
  --color-white: #ffffff;

  /* Typography */
  --font-heading: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Source Sans Pro', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Layout */
  --container-max: 1200px;
  --nav-height: 64px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
  --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-md);
  }
}

/* ========================================
   Navigation
   ======================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--color-primary);
  z-index: 1000;
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.nav-logo img {
  height: 28px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav-link {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 500;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-white);
  background: rgba(255,255,255,0.1);
}

.nav-link.active {
  color: var(--color-accent-light);
}

.nav-link-github {
  display: flex;
  align-items: center;
  margin-left: var(--space-sm);
  padding: var(--space-sm);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  transition: var(--transition-fast);
}

@media (max-width: 900px) {
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-primary);
    flex-direction: column;
    padding: var(--space-md);
    gap: 0;
    display: none;
    box-shadow: var(--shadow-lg);
  }

  .nav-links.active {
    display: flex;
  }

  .nav-link {
    width: 100%;
    padding: var(--space-md);
    border-radius: 0;
  }

  .nav-link-github {
    margin-left: 0;
    justify-content: center;
    margin-top: var(--space-md);
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: var(--space-lg);
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
  background: #e8eef4;
  padding: calc(var(--nav-height) + var(--space-3xl)) 0 var(--space-3xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  /* Blueprint grid pattern - graph paper style */
  background-image:
    linear-gradient(rgba(180, 195, 210, 0.8) 1px, transparent 1px),
    linear-gradient(90deg, rgba(180, 195, 210, 0.8) 1px, transparent 1px),
    linear-gradient(rgba(200, 210, 220, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(200, 210, 220, 0.5) 1px, transparent 1px);
  background-size: 100px 100px, 100px 100px, 20px 20px, 20px 20px;
  opacity: 0.5;
}

.hero-container {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.hero-logo {
  height: 80px;
  width: auto;
  margin-bottom: var(--space-xl);
}

@media (max-width: 768px) {
  .hero-logo {
    height: 60px;
  }
}

.hero-subtitle {
  color: var(--color-accent-dark);
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0 0 var(--space-lg);
  opacity: 0.9;
}

.hero-tagline {
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 400;
  margin: 0 0 var(--space-xl);
}

@media (max-width: 768px) {
  .hero-tagline {
    font-size: 1.1rem;
  }
}

.hero-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: var(--space-xl);
}

.hero-byline {
  color: var(--color-text-light);
  font-size: 0.95rem;
  margin: 0;
}

.hero-byline a {
  color: var(--color-accent-dark);
  text-decoration: none;
  font-weight: 600;
}

.hero-byline a:hover {
  text-decoration: underline;
}

/* ========================================
   Page Header (non-homepage)
   ======================================== */
.page-header {
  background: var(--color-primary);
  padding: calc(var(--nav-height) + var(--space-2xl)) 0 var(--space-2xl);
}

.page-header h1 {
  color: var(--color-white);
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  margin: 0 0 var(--space-sm);
}

.page-description {
  color: rgba(255,255,255,0.8);
  font-size: 1.15rem;
  margin: 0;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
  cursor: pointer;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
}

.btn-secondary {
  background: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-secondary:hover {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* ========================================
   Main Content
   ======================================== */
.main {
  padding: var(--space-3xl) 0;
  min-height: calc(100vh - var(--nav-height) - 300px);
}

.main-with-hero {
  padding-top: var(--space-3xl);
}

.main:not(.main-with-hero) {
  padding-top: calc(var(--nav-height) + var(--space-3xl));
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.3;
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; border-bottom: 2px solid var(--color-border); padding-bottom: var(--space-sm); }
h3 { font-size: 1.35rem; }
h4 { font-size: 1.15rem; }

h1:first-child,
h2:first-child {
  margin-top: 0;
}

p {
  margin: 0 0 var(--space-md);
}

a {
  color: var(--color-accent-dark);
  text-decoration: none;
  transition: var(--transition-fast);
}

a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

strong {
  font-weight: 600;
}

blockquote {
  margin: var(--space-lg) 0;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

blockquote p:last-child {
  margin-bottom: 0;
}

hr {
  border: none;
  height: 2px;
  background: var(--color-border);
  margin: var(--space-2xl) 0;
}

/* ========================================
   Feature Grid (3 columns like Arrow)
   ======================================== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  margin: var(--space-2xl) 0;
}

@media (max-width: 900px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

.feature-card {
  padding: var(--space-lg);
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: var(--transition-base);
}

.feature-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.feature-card h3 {
  margin-top: 0;
  color: var(--color-accent-dark);
  font-size: 1.25rem;
}

.feature-card p {
  color: var(--color-text-light);
  margin-bottom: 0;
}

.feature-card a {
  display: inline-block;
  margin-top: var(--space-md);
  font-weight: 600;
}

/* ========================================
   Code Blocks
   ======================================== */
code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-bg-alt);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
}

pre {
  margin: var(--space-lg) 0;
  padding: var(--space-lg);
  background: var(--color-code-bg);
  border-radius: var(--radius-md);
  overflow-x: auto;
  box-shadow: var(--shadow-md);
}

pre code {
  background: none;
  padding: 0;
  font-size: 0.875rem;
  color: #e6e6e6;
  line-height: 1.6;
}

/* Syntax highlighting */
.highlight .c, .highlight .c1, .highlight .cm { color: #6a737d; } /* comments */
.highlight .k, .highlight .kd, .highlight .kn { color: #ff7b72; } /* keywords */
.highlight .s, .highlight .s1, .highlight .s2 { color: #a5d6ff; } /* strings */
.highlight .n, .highlight .nf, .highlight .nx { color: #d2a8ff; } /* names/functions */
.highlight .mi, .highlight .mf { color: #79c0ff; } /* numbers */
.highlight .o, .highlight .p { color: #e6e6e6; } /* operators/punctuation */
.highlight .na { color: #7ee787; } /* attributes */

/* ========================================
   Tables
   ======================================== */
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  font-size: 0.95rem;
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

th, td {
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

th {
  background: var(--color-bg-alt);
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-text);
}

tr:last-child td {
  border-bottom: none;
}

tr:hover td {
  background: var(--color-bg);
}

/* ========================================
   Lists
   ======================================== */
ul, ol {
  margin: var(--space-md) 0;
  padding-left: var(--space-xl);
}

li {
  margin-bottom: var(--space-sm);
}

li::marker {
  color: var(--color-accent);
}

/* ========================================
   Callouts / Notices
   ======================================== */
.notice {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  margin: var(--space-lg) 0;
}

.notice-info {
  background: #e7f5ff;
  border-left: 4px solid #339af0;
}

.notice-warning {
  background: #fff9db;
  border-left: 4px solid #fab005;
}

.notice-success {
  background: #d3f9d8;
  border-left: 4px solid #40c057;
}

.notice strong {
  display: block;
  margin-bottom: var(--space-xs);
}

/* ========================================
   Footer
   ======================================== */
.footer {
  background: var(--color-primary);
  color: rgba(255,255,255,0.8);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3xl);
  margin-bottom: var(--space-2xl);
}

@media (max-width: 768px) {
  .footer-content {
    flex-direction: column;
    gap: var(--space-xl);
  }
}

.footer-brand img {
  height: 32px;
  margin-bottom: var(--space-md);
  filter: brightness(0) invert(1);
}

.footer-brand p {
  margin: 0;
  font-size: 0.9rem;
}

.footer-brand a {
  color: var(--color-accent-light);
}

.footer-links {
  display: flex;
  gap: var(--space-3xl);
}

@media (max-width: 600px) {
  .footer-links {
    flex-direction: column;
    gap: var(--space-xl);
  }
}

.footer-col h4 {
  color: var(--color-white);
  font-size: 0.9rem;
  font-weight: 600;
  margin: 0 0 var(--space-md);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-col a {
  display: block;
  color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
  padding: var(--space-xs) 0;
}

.footer-col a:hover {
  color: var(--color-white);
  text-decoration: none;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--space-xl);
}

.footer-bottom p {
  margin: 0;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
}

.footer-bottom a {
  color: rgba(255,255,255,0.7);
}

/* ========================================
   Utility Classes
   ======================================== */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-light); }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

/* Image styling */
img {
  max-width: 100%;
  height: auto;
}

.img-center {
  display: block;
  margin: var(--space-lg) auto;
}

/* ========================================
   Special page styles
   ======================================== */

/* Viewer page - full width iframe */
.viewer-container {
  width: 100%;
  height: calc(100vh - var(--nav-height) - 100px);
  min-height: 600px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.viewer-container iframe {
  width: 100%;
  height: 100%;
  border: none;
}