:root {
  /* Base Colors */
  --color-primary: #2D3748;
  --color-secondary: #4A5568;
  --color-accent: #667EEA;
  --color-accent-light: #764BA2;
  --color-background: #FAFAFA;
  --color-surface: #FFFFFF;
  --color-border: #E2E8F0;
  --color-text: #2D3748;
  --color-text-light: #718096;
  --color-text-muted: #A0AEC0;

  /* Surface Variants */
  --surface-01: #FFFFFF;
  --surface-02: #F7FAFC;
  --surface-03: #EDF2F7;

  /* Border Variants */
  --border-secondary: #CBD5E0;

  /* Accent Variants */
  --accent-primary: #667EEA;
  --accent-secondary: #764BA2;

  /* Text Variants */
  --text-secondary: #718096;

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-text: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  --gradient-subtle: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
  --gradient-mystery: linear-gradient(135deg, rgba(0, 0, 0, 0.7) 0%, rgba(45, 55, 72, 0.8) 50%, rgba(0, 0, 0, 0.6) 100%);

  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-display: 'SF Pro Display', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;

  /* Layout */
  --sidebar-width: 320px;
  --header-height: 160px;
  --content-max-width: 1000px;

  /* Transitions */
  --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-mystery: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);

  /* Brand Background Image - default, can be overridden */
  --brand-background-image: url('./pano.png');
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-primary);
  background: var(--color-background);
  color: var(--color-text);
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

.docs-app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* ===== ANIMATIONS ===== */
@keyframes pan-landscape {
  0% {
    background-position: center 0%;
  }

  100% {
    background-position: center 15%;
  }
}

@keyframes mystery-fade-in {
  0% {
    opacity: 0;
    transform: translateY(30px);
  }

  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes mystery-glow {

  0%,
  100% {
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.3);
  }

  50% {
    box-shadow: 0 0 30px rgba(102, 126, 234, 0.5);
  }
}

@keyframes spinner {
  0% {
    transform: rotate(0deg);
  }

  100% {
    transform: rotate(360deg);
  }
}

/* ===== BACKGROUND ===== */
.header-background {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background-image: var(--brand-background-image);
  background-size: cover;
  background-position: center 0%;
  background-repeat: no-repeat;
  z-index: 999;
  animation: pan-landscape 60s ease-in-out infinite alternate;
  pointer-events: none;
}

.header-background::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--gradient-mystery);
  backdrop-filter: blur(2px);
  z-index: 1;
}

/* ===== HEADER ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  z-index: 1000;
  transition: var(--transition-smooth);
  overflow: hidden;
  background: transparent;
  pointer-events: auto;
}

.header-container {
  height: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
  z-index: 1001;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  animation: mystery-fade-in 1.2s ease-out 0.3s both;
  margin-left: 1rem;
}

.brand-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.1;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.brand-fjell {
  color: rgba(255, 255, 255, 0.95);
}

.brand-default {
  background: var(--gradient-text);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.brand-tagline {
  margin: 0;
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.8);
  font-weight: 400;
  letter-spacing: 0.02em;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  animation: mystery-fade-in 1.2s ease-out 0.6s both;
}

.header-link {
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
  font-size: 0.875rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 2rem;
  transition: var(--transition-fast);
  letter-spacing: 0.01em;
  backdrop-filter: blur(10px);
  background: rgba(255, 255, 255, 0.1);
}

.header-link:hover {
  border-color: rgba(240, 147, 251, 0.8);
  color: #f093fb;
  background: rgba(255, 255, 255, 0.9);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(240, 147, 251, 0.3);
}

.header .version-badge {
  padding: 0.5rem 1rem;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.95);
  font-weight: 600;
  font-size: 0.8rem;
  border: 1px solid rgba(102, 126, 234, 0.5);
  border-radius: 1.5rem;
  transition: var(--transition-fast);
  letter-spacing: 0.05em;
  backdrop-filter: blur(10px);
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.3) 0%, rgba(118, 75, 162, 0.3) 100%);
  font-family: 'SF Mono', 'Monaco', 'Cascadia Code', 'Roboto Mono', monospace;
  position: relative;
  overflow: hidden;
  box-shadow: none;
}

.header .version-badge::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.header .version-badge:hover::before {
  left: 100%;
}

.header .version-badge:hover {
  border-color: rgba(102, 126, 234, 0.8);
  color: #667eea;
  background: rgba(255, 255, 255, 0.95);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(102, 126, 234, 0.4);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.menu-line {
  width: 20px;
  height: 2px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 1px;
  transition: var(--transition-fast);
}

/* ===== LAYOUT ===== */
.layout {
  display: flex;
  margin-top: var(--header-height);
  min-height: calc(100vh - var(--header-height));
}

/* ===== SIDEBAR ===== */
.sidebar {
  position: fixed;
  top: var(--header-height);
  left: 0;
  bottom: 0;
  width: var(--sidebar-width);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.95) 0%, rgba(250, 250, 250, 0.9) 100%);
  backdrop-filter: blur(20px);
  border-right: 1px solid rgba(226, 232, 240, 0.5);
  display: flex;
  flex-direction: column;
  z-index: 100;
  transform: translateX(-100%);
  transition: var(--transition-smooth);
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.1);
}

.sidebar-open {
  transform: translateX(0);
}

/* Sidebar header styles removed - navigation now starts at top */

/* ===== NAVIGATION ===== */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem 0;
}

.nav-sections {
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-sections li {
  margin: 0;
}

.nav-item {
  width: 100%;
  padding: 1rem 1.5rem;
  border: none;
  background: none;
  text-align: left;
  cursor: pointer;
  transition: var(--transition-fast);
  border-left: 3px solid transparent;
  display: flex;
  align-items: center;
}

.nav-item:hover {
  background: var(--surface-02);
  border-left-color: var(--color-accent);
}

.nav-item.active {
  background: linear-gradient(90deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.05) 100%);
  border-left-color: var(--color-accent);
}

.nav-item-content {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-title {
  font-weight: 600;
  color: var(--color-text);
  font-size: 0.95rem;
}

.nav-subtitle {
  font-size: 0.8rem;
  color: var(--color-text-light);
  line-height: 1.4;
}

/* Subsection navigation styles */
.nav-subsections {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--color-border);
  margin-left: 1.5rem;
}

.nav-subsections li {
  margin: 0;
}

.nav-subitem {
  width: 100%;
  padding: 0.75rem 1.5rem;
  border: none;
  background: none;
  text-align: left;
  cursor: pointer;
  transition: var(--transition-fast);
  border-left: 2px solid transparent;
  display: flex;
  align-items: center;
}

.nav-subitem:hover {
  background: var(--surface-01);
  border-left-color: var(--color-accent);
}

.nav-subitem.active {
  background: linear-gradient(90deg, rgba(102, 126, 234, 0.08) 0%, rgba(118, 75, 162, 0.03) 100%);
  border-left-color: var(--color-accent);
}

.nav-subitem-content {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.nav-subitem .nav-subtitle {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text);
}

.nav-description {
  font-size: 0.75rem;
  color: var(--color-text-light);
  line-height: 1.3;
}

.sidebar-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--color-border);
  background: var(--surface-02);
}

.footer-text {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  text-align: center;
}

/* ===== MOBILE MENU ===== */
.mobile-menu-button {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 200;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 0.75rem;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  transition: var(--transition-fast);
}

.mobile-menu-button:hover {
  background: var(--surface-02);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

.hamburger {
  width: 20px;
  height: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hamburger span {
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: var(--transition-fast);
}

.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 50;
  backdrop-filter: blur(4px);
}

/* ===== MAIN CONTENT ===== */
.main-content {
  margin-left: 0;
  min-height: calc(100vh - var(--header-height));
  padding-top: 0;
  background: var(--color-background);
  transition: var(--transition-smooth);
  position: relative;
  z-index: 1;
}

.content {
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 1rem 2rem 2rem 2rem;
  animation: mystery-fade-in 0.8s ease-out;
  position: relative;
  z-index: 1;
}

.content-header {
  margin-bottom: 2rem;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.breadcrumb-project {
  font-weight: 600;
}

.breadcrumb-separator {
  color: var(--color-text-muted);
}

.breadcrumb-section {
  color: var(--color-accent);
}

.page-title {
  margin: 0 0 0.5rem 0;
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-family: var(--font-display);
  letter-spacing: -0.02em;
}

.page-subtitle {
  margin: 0;
  font-size: 1.2rem;
  color: var(--color-text-light);
  font-weight: 400;
}

/* ===== LOADING ===== */
.loading-spinner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  gap: 1rem;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-border);
  border-top: 3px solid var(--color-accent);
  border-radius: 50%;
  animation: spinner 1s linear infinite;
}

.loading-spinner p {
  color: var(--color-text-light);
  font-weight: 500;
}

/* ===== FULLSCREEN IMAGE ===== */
.fullscreen-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.9);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
  animation: mystery-fade-in 0.3s ease-out;
}

.fullscreen-content {
  position: relative;
  max-width: 95vw;
  max-height: 95vh;
}

.fullscreen-image {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.close-fullscreen {
  position: absolute;
  top: -40px;
  right: 0;
  background: none;
  border: none;
  color: white;
  font-size: 2rem;
  cursor: pointer;
  padding: 0.5rem;
  line-height: 1;
  transition: var(--transition-fast);
}

.close-fullscreen:hover {
  transform: scale(1.1);
  opacity: 0.8;
}

/* ===== MARKDOWN CONTENT ===== */
.markdown-content {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text);
}

.markdown-content h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin: 3rem 0 1.5rem 0;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-family: var(--font-display);
}

.markdown-content h2 {
  font-size: 2rem;
  font-weight: 600;
  margin: 2.5rem 0 1rem 0;
  color: var(--color-primary);
  font-family: var(--font-display);
}

.markdown-content h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 2rem 0 1rem 0;
  color: var(--color-secondary);
}

.markdown-content p {
  margin: 1rem 0;
  text-align: justify;
}

.markdown-content img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  margin: 1.5rem 0;
  transition: var(--transition-fast);
}

.markdown-content img:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.markdown-content pre {
  background: var(--surface-02);
  border-radius: 8px;
  padding: 1.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  font-size: 0.9em;
}

.markdown-content pre code {
  background: none;
  padding: 0;
  border-radius: 0;
  border: none;
  font-size: inherit;
}

.markdown-content code {
  background: var(--surface-02);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
}

.markdown-content blockquote {
  border-left: 4px solid var(--color-accent);
  margin: 1.5rem 0;
  padding: 1rem 1.5rem;
  background: var(--surface-02);
  border-radius: 0 8px 8px 0;
}

.markdown-content ul,
.markdown-content ol {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.markdown-content li {
  margin: 0.5rem 0;
}

.markdown-content a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: var(--transition-fast);
}

.markdown-content a:hover {
  border-bottom-color: var(--color-accent);
}

.markdown-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  background: var(--color-surface);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.markdown-content th,
.markdown-content td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.markdown-content th {
  background: var(--surface-02);
  font-weight: 600;
  color: var(--color-primary);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (min-width: 768px) {
  .sidebar {
    transform: translateX(0);
  }

  .mobile-menu-button {
    display: none;
  }

  .menu-toggle {
    display: none !important;
  }

  .main-content {
    margin-left: var(--sidebar-width);
  }

  .sidebar-overlay {
    display: none;
  }
}

@media (max-width: 767px) {
  .menu-toggle {
    display: flex !important;
  }

  .header-actions {
    display: none;
  }

  .brand {
    margin-left: 0;
  }

  .brand-title {
    font-size: 1.8rem;
  }

  .brand-tagline {
    font-size: 0.9rem;
  }

  .content {
    padding: 1rem;
  }

  .page-title {
    font-size: 2rem;
  }

  .markdown-content h1 {
    font-size: 2rem;
  }

  .markdown-content h2 {
    font-size: 1.5rem;
  }

  .markdown-content h3 {
    font-size: 1.25rem;
  }
}

/*
 * Theme System for Fjell Documentation Template
 *
 * Projects should define their own themes by creating CSS classes
 * with the pattern .brand-{theme-name} and overriding these variables:
 *
 * --color-accent: Primary accent color
 * --color-accent-light: Lighter accent color
 * --gradient-primary: Primary gradient for buttons/badges
 * --gradient-text: Text gradient for headings
 *
 * Example:
 * .brand-my-project {
 *   --color-accent: #667EEA;
 *   --color-accent-light: #764BA2;
 *   --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
 *   --gradient-text: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #9f7aea 100%);
 * }
 */

/* Example Theme - can be used as a reference */
.brand-example {
  --color-accent: #667EEA;
  --color-accent-light: #764BA2;
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-text: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #9f7aea 100%);
}