/* =============================================================================
   Sustalium Brand Colors - Custom CSS

   Primary Colors:
   - Deep Navy: #0d2137 (dark background)
   - Electric Green: #2ed573 (accent/highlight)
   - Pure White: #ffffff (text on dark)

   Secondary Colors:
   - Slate: #1a3a5c (lighter navy for cards)
   - Muted Green: #26b862 (hover states)
   - Light Gray: #f0f4f8 (light mode backgrounds)
   ============================================================================= */

/* -----------------------------------------------------------------------------
   CSS Custom Properties (Dark Mode - Default)
   ----------------------------------------------------------------------------- */
:root,
[data-md-color-scheme="slate"] {
  /* Primary brand colors */
  --md-primary-fg-color: #0d2137;
  --md-primary-fg-color--light: #1a3a5c;
  --md-primary-fg-color--dark: #071420;

  /* Accent colors */
  --md-accent-fg-color: #2ed573;
  --md-accent-fg-color--transparent: rgba(46, 213, 115, 0.1);

  /* Typography colors */
  --md-typeset-color: rgba(255, 255, 255, 0.87);
  --md-typeset-a-color: #2ed573;

  /* Code blocks */
  --md-code-bg-color: #1a3a5c;
  --md-code-fg-color: #e8f0f8;
  --md-code-hl-color: rgba(46, 213, 115, 0.2);

  /* Footer */
  --md-footer-bg-color: #071420;
  --md-footer-bg-color--dark: #050d15;

  /* Custom Sustalium variables */
  --sustalium-navy: #0d2137;
  --sustalium-navy-light: #1a3a5c;
  --sustalium-green: #2ed573;
  --sustalium-green-hover: #26b862;
  --sustalium-green-muted: rgba(46, 213, 115, 0.15);
}

/* -----------------------------------------------------------------------------
   Light Mode Overrides
   ----------------------------------------------------------------------------- */
[data-md-color-scheme="default"] {
  --md-primary-fg-color: #0d2137;
  --md-primary-fg-color--light: #1a3a5c;
  --md-primary-fg-color--dark: #071420;

  --md-accent-fg-color: #2ed573;

  --md-typeset-color: #0d2137;
  --md-typeset-a-color: #1a8a4a;

  --md-code-bg-color: #f0f4f8;
  --md-code-fg-color: #0d2137;
}

/* -----------------------------------------------------------------------------
   Header Styling
   ----------------------------------------------------------------------------- */
.md-header {
  background-color: var(--sustalium-navy);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.md-header__title {
  font-weight: 600;
  letter-spacing: 0.5px;
}

.md-header__button.md-logo {
  padding: 0.4rem;
}

.md-header__button.md-logo img,
.md-header__button.md-logo svg {
  height: 1.8rem;
  width: auto;
}

/* -----------------------------------------------------------------------------
   Navigation
   ----------------------------------------------------------------------------- */
.md-nav__link:hover,
.md-nav__link:focus {
  color: var(--sustalium-green);
}

.md-nav__link--active {
  color: var(--sustalium-green);
  font-weight: 600;
}

/* Tab navigation */
.md-tabs {
  background-color: var(--sustalium-navy-light);
}

.md-tabs__link--active,
.md-tabs__link:hover {
  color: var(--sustalium-green);
}

/* -----------------------------------------------------------------------------
   Content Typography
   ----------------------------------------------------------------------------- */
.md-typeset h1 {
  color: var(--sustalium-green);
  font-weight: 700;
}

.md-typeset h2,
.md-typeset h3 {
  font-weight: 600;
}

.md-typeset a {
  color: var(--sustalium-green);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.md-typeset a:hover {
  color: var(--sustalium-green-hover);
  border-bottom-color: var(--sustalium-green-hover);
}

/* -----------------------------------------------------------------------------
   Buttons
   ----------------------------------------------------------------------------- */
.md-button {
  border-radius: 6px;
  font-weight: 600;
  text-transform: none;
  letter-spacing: 0.3px;
  transition: all 0.2s ease;
}

.md-button--primary {
  background-color: var(--sustalium-green);
  border-color: var(--sustalium-green);
  color: var(--sustalium-navy);
}

.md-button--primary:hover {
  background-color: var(--sustalium-green-hover);
  border-color: var(--sustalium-green-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(46, 213, 115, 0.3);
}

/* Secondary button - outlined with good contrast */
.md-button--secondary {
  background-color: transparent;
  border: 2px solid var(--sustalium-green);
  color: var(--sustalium-green) !important;
}

.md-button--secondary:hover {
  background-color: var(--sustalium-green);
  border-color: var(--sustalium-green);
  color: var(--sustalium-navy) !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(46, 213, 115, 0.3);
}

/* Light mode secondary button */
[data-md-color-scheme="default"] .md-button--secondary {
  border-color: var(--sustalium-navy);
  color: var(--sustalium-navy) !important;
}

[data-md-color-scheme="default"] .md-button--secondary:hover {
  background-color: var(--sustalium-navy);
  color: #ffffff !important;
}

/* -----------------------------------------------------------------------------
   Cards & Admonitions
   ----------------------------------------------------------------------------- */
.md-typeset .admonition,
.md-typeset details {
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.md-typeset .admonition.note,
.md-typeset details.note {
  border-color: var(--sustalium-green);
}

.md-typeset .admonition.note > .admonition-title,
.md-typeset details.note > summary {
  background-color: var(--sustalium-green-muted);
}

.md-typeset .admonition.tip,
.md-typeset details.tip {
  border-color: var(--sustalium-green);
}

.md-typeset .admonition.tip > .admonition-title,
.md-typeset details.tip > summary {
  background-color: var(--sustalium-green-muted);
}

/* -----------------------------------------------------------------------------
   Code Blocks
   ----------------------------------------------------------------------------- */
.md-typeset code {
  border-radius: 4px;
  padding: 0.1em 0.4em;
}

.md-typeset pre > code {
  border-radius: 8px;
}

.highlight .hll {
  background-color: var(--sustalium-green-muted);
}

/* Copy button */
.md-clipboard {
  color: var(--sustalium-green);
}

.md-clipboard:hover {
  color: var(--sustalium-green-hover);
}

/* -----------------------------------------------------------------------------
   Blog Post Cards
   ----------------------------------------------------------------------------- */
.md-post {
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.md-post:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.md-post__meta {
  color: var(--sustalium-green);
  opacity: 0.9;
}

/* Category/Tag chips */
.md-tag {
  background-color: var(--sustalium-green-muted);
  color: var(--sustalium-green);
  border-radius: 16px;
  padding: 0.2em 0.8em;
  font-size: 0.75rem;
  font-weight: 500;
}

.md-tag:hover {
  background-color: var(--sustalium-green);
  color: var(--sustalium-navy);
}

/* -----------------------------------------------------------------------------
   Footer
   ----------------------------------------------------------------------------- */
.md-footer {
  background-color: var(--md-footer-bg-color);
}

.md-footer-meta {
  background-color: var(--md-footer-bg-color--dark);
}

.md-social__link svg {
  fill: currentColor;
  transition: fill 0.2s ease;
}

.md-social__link:hover svg {
  fill: var(--sustalium-green);
}

/* -----------------------------------------------------------------------------
   Search
   ----------------------------------------------------------------------------- */
.md-search__input {
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
}

.md-search__input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.md-search__input:focus {
  background-color: rgba(255, 255, 255, 0.15);
}

[data-md-color-scheme="default"] .md-search__input {
  background-color: rgba(13, 33, 55, 0.05);
}

/* Search suggestions */
.md-search-result__link:hover {
  background-color: var(--sustalium-green-muted);
}

.md-search-result__title {
  color: var(--sustalium-green);
}

/* -----------------------------------------------------------------------------
   Table of Contents
   ----------------------------------------------------------------------------- */
.md-nav__link--passed {
  color: var(--sustalium-green);
}

.md-nav__link--active {
  color: var(--sustalium-green);
  font-weight: 600;
}

/* TOC indicator */
.md-nav__link::before {
  background-color: var(--sustalium-green);
}

/* -----------------------------------------------------------------------------
   Scrollbar (Webkit browsers)
   ----------------------------------------------------------------------------- */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--sustalium-navy);
}

::-webkit-scrollbar-thumb {
  background: var(--sustalium-navy-light);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--sustalium-green);
}

/* -----------------------------------------------------------------------------
   Hero Section (Homepage)
   ----------------------------------------------------------------------------- */
.hero-section {
  text-align: center;
  padding: 3rem 1rem;
  margin-bottom: 2rem;
}

.hero-section h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--sustalium-green) 0%, #4ade80 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-section .tagline {
  font-size: 1.25rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto 2rem;
}

/* Feature cards grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin: 2rem 0;
}

@media (max-width: 768px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }
}

/* Feature card as clickable link */
a.feature-card {
  display: flex;
  flex-direction: column;
  background: var(--sustalium-navy-light);
  border-radius: 12px;
  padding: 1.5rem;
  border: 1px solid rgba(46, 213, 115, 0.2);
  transition: all 0.2s ease;
  text-decoration: none !important;
  color: inherit !important;
  cursor: pointer;
}

a.feature-card:hover {
  border-color: var(--sustalium-green);
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(46, 213, 115, 0.2);
}

/* Feature icon container with Lucide SVGs */
.feature-card .feature-icon {
  position: relative;
  width: 32px;
  height: 32px;
  margin-bottom: 1rem;
}

/* Base Lucide icon - hairline stroke */
.feature-card .lucide-icon {
  position: absolute;
  top: 0;
  left: 0;
  color: rgba(46, 213, 115, 0.4);
  transition: color 0.3s ease;
}

.feature-card:hover .lucide-icon {
  color: rgba(46, 213, 115, 0.6);
}

/* Glow overlay icon */
.feature-card .lucide-glow {
  position: absolute;
  top: 0;
  left: 0;
  color: var(--sustalium-green);
  filter: drop-shadow(0 0 3px var(--sustalium-green)) drop-shadow(0 0 6px var(--sustalium-green));
}

/* Static path styling */
.feature-card .icon-path {
  stroke: currentColor;
  stroke-width: 1.5;
}

/* Animated glow path - the traveling dot effect */
.feature-card .glow-path {
  stroke: var(--sustalium-green);
  stroke-width: 1.5;
  stroke-dasharray: 6 200;
  stroke-dashoffset: 0;
  animation: glowTravel 8s ease-in-out infinite;
  filter: drop-shadow(0 0 3px var(--sustalium-green)) drop-shadow(0 0 6px var(--sustalium-green));
}

/* Stagger the animation for each path - spread across the full cycle */
.feature-card .glow-path:nth-child(1) { animation-delay: 0s; }
.feature-card .glow-path:nth-child(2) { animation-delay: 1.5s; }
.feature-card .glow-path:nth-child(3) { animation-delay: 3s; }
.feature-card .glow-path:nth-child(4) { animation-delay: 4.5s; }
.feature-card .glow-path:nth-child(5) { animation-delay: 6s; }

/* Glow travel animation - super slow dot moving along the path */
@keyframes glowTravel {
  0% {
    stroke-dashoffset: 200;
    opacity: 0;
  }
  5% {
    opacity: 1;
  }
  95% {
    opacity: 1;
  }
  100% {
    stroke-dashoffset: -200;
    opacity: 0;
  }
}

/* Subtle constant pulse on the glow overlay */
.feature-card .lucide-glow {
  animation: iconPulse 4s ease-in-out infinite;
}

@keyframes iconPulse {
  0%, 100% {
    filter: drop-shadow(0 0 2px var(--sustalium-green)) drop-shadow(0 0 4px var(--sustalium-green));
  }
  50% {
    filter: drop-shadow(0 0 4px var(--sustalium-green)) drop-shadow(0 0 8px var(--sustalium-green));
  }
}

/* Intensify glow on hover */
.feature-card:hover .lucide-glow {
  animation: iconPulseHover 2s ease-in-out infinite;
}

@keyframes iconPulseHover {
  0%, 100% {
    filter: drop-shadow(0 0 4px var(--sustalium-green)) drop-shadow(0 0 8px var(--sustalium-green));
  }
  50% {
    filter: drop-shadow(0 0 8px var(--sustalium-green)) drop-shadow(0 0 16px var(--sustalium-green));
  }
}

.feature-card h3 {
  color: var(--sustalium-green);
  margin: 0 0 0.75rem 0;
  font-size: 1.1rem;
  font-weight: 600;
}

.feature-card p {
  color: rgba(255, 255, 255, 0.8);
  margin: 0;
  flex-grow: 1;
  font-size: 0.9rem;
  line-height: 1.5;
}

/* Arrow indicator */
.feature-card .feature-arrow {
  color: var(--sustalium-green);
  opacity: 0;
  transform: translateX(-10px);
  transition: all 0.2s ease;
  margin-top: 1rem;
  font-size: 1.2rem;
}

a.feature-card:hover .feature-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* Light mode feature cards */
[data-md-color-scheme="default"] a.feature-card {
  background: #ffffff;
  border-color: rgba(13, 33, 55, 0.1);
}

[data-md-color-scheme="default"] .feature-card p {
  color: rgba(13, 33, 55, 0.7);
}

[data-md-color-scheme="default"] a.feature-card:hover {
  border-color: var(--sustalium-green);
}

/* -----------------------------------------------------------------------------
   Announcement Bar
   ----------------------------------------------------------------------------- */
.md-banner {
  background-color: var(--sustalium-green);
  color: var(--sustalium-navy);
}

.md-banner__inner {
  font-weight: 500;
}

.md-banner a {
  color: var(--sustalium-navy);
  text-decoration: underline;
}

/* -----------------------------------------------------------------------------
   Reading Progress (if using extension)
   ----------------------------------------------------------------------------- */
.progress-bar {
  background: linear-gradient(90deg, var(--sustalium-green) 0%, #4ade80 100%);
  height: 3px;
}

/* -----------------------------------------------------------------------------
   Print Styles
   ----------------------------------------------------------------------------- */
@media print {
  .md-header,
  .md-footer,
  .md-sidebar {
    display: none;
  }

  .md-typeset h1 {
    color: #0d2137;
    -webkit-print-color-adjust: exact;
  }
}

/* -----------------------------------------------------------------------------
   Animations
   ----------------------------------------------------------------------------- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.md-content {
  animation: fadeIn 0.3s ease-out;
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}