/* =====================================================
   UNIFIED STYLESHEET
   Core styles for the entire portfolio website
   ===================================================== */

/* =====================================================
   CSS VARIABLES
   ===================================================== */
:root {
  /* Typography */
  --font-primary: 'Atkinson Hyperlegible Next', sans-serif;
  --font-code: 'Atkinson Hyperlegible Mono', monospace;
  --font-mascot: 'Cabin Condensed', sans-serif;
  --font-carousel: var(--font-mascot);

  /* Colors - Light Mode Default */
  --color-background: #ffffff;
  --color-text: #121212;
  --color-secondary: #eeeeee;
  --color-border: #333333;
  --color-card-bg: #f5f5f5;
  --color-active-light: #eaeaea;
  --color-active-dark: #333333;

  /* Spacing */
  --spacing-unit: 8px;
  --spacing-small: var(--spacing-unit);
  --spacing-medium: calc(var(--spacing-unit) * 3);
  --spacing-large: calc(var(--spacing-unit) * 8);

  /* Typography Scale */
  --font-size-huge: 5rem;
  --font-size-large: 3rem;
  --font-size-medium: 1.5rem;
  --font-size-regular: 1rem;
  --font-size-small: 0.875rem;

  /* Shadow and Transform Variables */
  --shadow-size-default: 4px;
  --shadow-size-hover: 6px;
  --shadow-size-card: 8px;
  --shadow-opacity-light: 0.6;
  --hover-transform: translate(-2px, -2px);
  --active-transform: translate(2px, 2px);

  /* Navigation */
  --nav-height: 60px;
  --sidebar-width: 200px;
  --sidebar-collapsed-width: 50px;
}

/* =====================================================
   BASE STYLES
   ===================================================== */
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 20px);
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-background);
  color: var(--color-text);
  line-height: 1.6;
  margin: 0;
  padding: 0;
  transition: background-color 0.3s ease;
}

/* Body padding when navigation is present */
body.has-navbar {
  padding-top: var(--nav-height);
}

body.has-navbar.has-sidebar {
  padding-top: var(--nav-height);
}

/* Main content wrapper */
main {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-large);
}

h1, h2, h3, h4, h5, h6 {
  margin-top: 0;
  line-height: 1.2;
  font-weight: 700;
}

/* =====================================================
   NAVIGATION BAR (Top)
   ===================================================== */
.site-navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background-color: var(--color-background);
  border-bottom: 3px solid var(--color-border);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--spacing-large);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.site-navbar-brand {
  font-size: var(--font-size-medium);
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -1px;
  background: none;
  border: none;
  box-shadow: none;
  padding: 0;
  margin: 0;
  display: inline-block;
  transition: color 0.2s ease;
}

.site-navbar-brand:hover {
  color: #666666;
  transform: none;
  box-shadow: none;
}

.site-navbar-menu {
  display: flex;
  gap: var(--spacing-medium);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-navbar-menu li {
  margin: 0;
}

.site-navbar-menu a {
  background-color: white;
  color: var(--color-text);
  border: 2px solid var(--color-text);
  box-shadow: 4px 4px 0 var(--color-text);
  text-decoration: none;
  transition: all 0.2s ease;
  padding: 6px 12px;
  display: inline-block;
  font-weight: 600;
  font-size: var(--font-size-small);
}

.site-navbar-menu a:hover,
.site-navbar-menu a:focus {
  transform: var(--hover-transform);
  box-shadow: 6px 6px 1px rgba(0, 0, 0, var(--shadow-opacity-light));
}

.site-navbar-menu a:active {
  transform: var(--active-transform);
  box-shadow: 1px 1px 0 var(--color-text);
  background-color: var(--color-active-light);
}

.site-navbar-menu a.active {
  background-color: var(--color-border);
  color: var(--color-background);
}

/* Mobile menu toggle */
.navbar-toggle {
  display: none;
  background-color: white;
  color: var(--color-text);
  border: 2px solid var(--color-text);
  box-shadow: 4px 4px 0 var(--color-text);
  padding: 8px 12px;
  cursor: pointer;
  font-size: var(--font-size-regular);
  font-weight: 600;
  transition: all 0.2s ease;
}

.navbar-toggle:hover,
.navbar-toggle:focus {
  transform: var(--hover-transform);
  box-shadow: 6px 6px 1px rgba(0, 0, 0, var(--shadow-opacity-light));
}

.navbar-toggle:active {
  transform: var(--active-transform);
  box-shadow: 1px 1px 0 var(--color-text);
  background-color: var(--color-active-light);
}

/* =====================================================
   SIDEBAR NAVIGATION (Docs pages)
   ===================================================== */
#sidebar {
  width: var(--sidebar-width);
  background: var(--color-card-bg);
  padding: 15px;
  height: calc(100vh - var(--nav-height));
  position: fixed;
  top: var(--nav-height);
  left: 0;
  overflow-y: auto;
  color: var(--color-text);
  transition: all 0.3s ease-in-out;
  border-right: 2px solid var(--color-border);
  z-index: 900;
}

#sidebar.collapsed {
  width: var(--sidebar-collapsed-width);
  padding: 15px 0;
  background: transparent;
  border-right: none;
  padding-left: 10px;
}

#sidebar.collapsed h2,
#sidebar.collapsed ul {
  display: none;
}

#sidebar.collapsed .sidebar-header {
  justify-content: center;
  margin-bottom: 0;
}

#sidenav-toggle-container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  min-width: 40px;
  min-height: 40px;
  border-radius: 50%;
  transition: all 0.3s ease;
  background-color: rgba(0, 0, 0, 0.05);
  position: relative;
  cursor: pointer;
}

#sidebar.collapsed #sidenav-toggle-container {
  position: fixed;
  top: calc(var(--nav-height) + 15px);
  left: 10px;
}

.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
}

#sidenav-toggle {
  width: 24px;
  height: 24px;
  cursor: pointer;
  z-index: 100;
}

#sidebar h2 {
  margin-top: 0;
  font-size: var(--font-size-medium);
}

#sidebar ul {
  list-style-type: none;
  padding: 0;
}

#sidebar ul li a {
  text-decoration: none;
  color: var(--color-text);
  display: block;
  padding: 8px 0 8px 15px;
  margin-bottom: 5px;
  background-color: white;
  border: 2px solid var(--color-border);
  box-shadow: 4px 4px 0 var(--color-border);
  transition: all 0.2s ease;
  font-weight: 600;
}

#sidebar ul li a:hover,
#sidebar ul li a:focus {
  transform: var(--hover-transform);
  box-shadow: 6px 6px 1px rgba(0, 0, 0, var(--shadow-opacity-light));
}

#sidebar ul li a:active {
  transform: var(--active-transform);
  box-shadow: 1px 1px 0 var(--color-border);
  background-color: var(--color-active-light);
}

/* Sidebar submenu styles */
#sidebar ul .submenu {
  display: none;
  padding-left: 10px;
  margin: 0;
  transition: max-height 0.2s ease;
}

#sidebar ul li.open > .submenu {
  display: block;
}

#sidebar ul .submenu li a {
  font-size: 0.93em;
  padding: 4px 0 4px 28px;
  margin-bottom: 2px;
  background: none;
  border: none;
  box-shadow: none;
  color: var(--color-text);
  opacity: 0.85;
}

#sidebar ul .submenu li a:hover,
#sidebar ul .submenu li a:focus {
  color: var(--color-border);
  background: rgba(0, 0, 0, 0.03);
  text-decoration: underline;
  box-shadow: none;
  transform: none;
}

#sidebar ul li > a.has-submenu {
  position: relative;
  padding-right: 2.2em;
}

.submenu-caret {
  position: absolute;
  right: 1em;
  top: 50%;
  transform: translateY(-50%) rotate(0deg);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), color 0.2s;
  font-size: 1.25em;
  color: #333;
  pointer-events: auto;
  background: none;
  border: none;
  outline: none;
  z-index: 1;
}

.submenu-caret::before {
  content: '\25BC';
  display: inline-block;
}

#sidebar ul li.open > a.has-submenu .submenu-caret {
  transform: translateY(-50%) rotate(180deg);
  color: var(--color-border);
}

/* Content adjustment when sidebar is present */
#content {
  margin-left: calc(var(--sidebar-width) + 30px);
  padding: 20px 20px 20px 0;
  width: calc(100% - var(--sidebar-width) - 30px);
  transition: margin-left 0.3s ease-in-out, width 0.3s ease-in-out;
}

#content.expanded {
  margin-left: var(--sidebar-collapsed-width);
  width: calc(100% - var(--sidebar-collapsed-width));
  padding: 20px 20px 20px 0;
}

/* =====================================================
   BUTTONS & LINKS (3D Skeuomorphic Style)
   ===================================================== */
a {
  background-color: white;
  color: var(--color-text);
  border: 2px solid var(--color-text);
  box-shadow: 4px 4px 0 var(--color-text);
  text-decoration: none;
  transition: all 0.2s ease;
  padding: 6px 12px;
  display: inline-block;
  font-weight: 600;
}

a:hover,
a:focus {
  transform: var(--hover-transform);
  box-shadow: 6px 6px 1px rgba(0, 0, 0, var(--shadow-opacity-light));
}

a:active {
  transform: var(--active-transform);
  box-shadow: 1px 1px 0 var(--color-text);
  background-color: var(--color-active-light);
}

/* Footer links (simple style) */
footer a {
  text-decoration: underline;
  color: var(--color-text);
  padding: 0;
  font-weight: bold;
  display: inline;
  border: none;
  box-shadow: none;
  transition: color 0.2s ease;
  background: none;
}

footer a:hover,
footer a:focus {
  text-decoration: underline;
  box-shadow: none;
  transform: none;
  color: #666666;
}

footer a:active {
  transform: none;
  box-shadow: none;
  background: none;
  color: #999999;
}

/* =====================================================
   DARK MODE
   ===================================================== */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #121212;
    --color-text: #ffffff;
    --color-secondary: #333333;
    --color-card-bg: #1e1e1e;
    --color-border: #ffffff;
    --shadow-color: rgba(255, 255, 255, 0.33);
  }

  /* Navigation */
  .site-navbar {
    background-color: var(--color-background);
    border-bottom-color: var(--color-border);
  }

  .site-navbar-brand {
    color: var(--color-text);
  }

  .site-navbar-brand:hover {
    color: #cccccc;
  }

  .site-navbar-menu a {
    background-color: #ffffff;
    color: #000000;
    border: 2px solid #555555;
    box-shadow: 4px 4px 0 var(--shadow-color);
  }

  .site-navbar-menu a:hover,
  .site-navbar-menu a:focus {
    box-shadow: 6px 6px 1px rgba(255, 255, 255, 0.1);
  }

  .site-navbar-menu a:active {
    box-shadow: 1px 1px 0 var(--shadow-color);
    background-color: #eaeaea;
  }

  .site-navbar-menu a.active {
    background-color: var(--color-border);
    color: var(--color-background);
  }

  .navbar-toggle {
    background-color: #ffffff;
    color: #000000;
    border: 2px solid #555555;
    box-shadow: 4px 4px 0 var(--shadow-color);
  }

  .navbar-toggle:hover,
  .navbar-toggle:focus {
    box-shadow: 6px 6px 1px rgba(255, 255, 255, 0.1);
  }

  .navbar-toggle:active {
    box-shadow: 1px 1px 0 var(--shadow-color);
    background-color: #eaeaea;
  }

  /* Sidebar */
  #sidebar {
    background: var(--color-card-bg);
    color: var(--color-text);
    border-right-color: var(--color-border);
  }

  #sidenav-toggle-container {
    background-color: rgba(255, 255, 255, 0.4);
  }

  #sidebar ul li a {
    color: #ffffff;
    background-color: #222;
    border: 2px solid #555;
    box-shadow: 4px 4px 0 rgba(255, 255, 255, 0.2);
  }

  #sidebar ul li a:hover,
  #sidebar ul li a:focus {
    background-color: #333;
    box-shadow: 6px 6px 1px rgba(255, 255, 255, 0.1);
  }

  #sidebar ul li a:active {
    background-color: #444;
    box-shadow: 1px 1px 0 rgba(255, 255, 255, 0.1);
  }

  #sidebar ul .submenu li a {
    color: #bbb;
  }

  #sidebar ul .submenu li a:hover,
  #sidebar ul .submenu li a:focus {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
  }

  .submenu-caret {
    color: #fff;
  }

  #sidebar ul li.open > a.has-submenu .submenu-caret {
    color: #fff;
  }

  /* Links */
  a {
    background-color: #ffffff;
    color: #000000;
    border: 2px solid #555555;
    box-shadow: 4px 4px 0 var(--shadow-color);
  }

  a:hover,
  a:focus {
    box-shadow: 6px 6px 1px rgba(255, 255, 255, 0.1);
  }

  a:active {
    box-shadow: 1px 1px 0 var(--shadow-color);
    background-color: #eaeaea;
  }

  /* Footer links */
  footer a {
    background-color: transparent;
    color: #ffffff;
    border: none;
    box-shadow: none;
    padding: 0;
  }

  footer a:hover,
  footer a:focus {
    color: #cccccc;
    transform: none;
    box-shadow: none;
  }

  footer a:active {
    color: #999999;
    transform: none;
    box-shadow: none;
    background: none;
  }
}

/* =====================================================
   RESPONSIVE ADJUSTMENTS
   ===================================================== */
@media (max-width: 768px) {
  :root {
    --font-size-huge: 3.5rem;
    --font-size-large: 2rem;
  }

  main {
    padding: var(--spacing-medium);
  }

  /* Mobile navigation */
  .site-navbar {
    padding: 0 var(--spacing-medium);
  }

  .navbar-toggle {
    display: block;
  }

  .site-navbar-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background-color: var(--color-background);
    border-bottom: 3px solid var(--color-border);
    flex-direction: column;
    gap: 0;
    padding: var(--spacing-medium);
    display: none;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  }

  .site-navbar-menu.active {
    display: flex;
  }

  .site-navbar-menu li {
    width: 100%;
  }

  .site-navbar-menu a {
    width: 100%;
    text-align: center;
    margin-bottom: var(--spacing-small);
  }

  /* Sidebar adjustments */
  #sidebar.collapsed {
    width: auto;
    background: transparent;
    position: absolute;
    z-index: 10;
  }

  #sidebar.collapsed #sidenav-toggle-container {
    left: 12px;
  }

  #content,
  #content.expanded {
    padding: 20px 20px 20px 0;
    margin-left: 20px;
    margin-right: 0;
    width: calc(100% - 20px);
  }
}

@media (max-width: 575px) {
  .site-navbar-brand {
    font-size: 1.2rem;
  }

  main {
    padding: var(--spacing-small);
  }
}