/* Critical CSS - Loaded in head to prevent FOUC */

/* ==========================================================================
   CSS Custom Properties with @property
   ========================================================================== */

@property --primary-h {
  syntax: "<number>";
  inherits: true;
  initial-value: 138;
}

@property --primary-s {
  syntax: "<percentage>";
  inherits: true;
  initial-value: 100%;
}

@property --primary-l {
  syntax: "<percentage>";
  inherits: true;
  initial-value: 34%;
}

@property --transition-duration {
  syntax: "<time>";
  inherits: true;
  initial-value: 0.3s;
}

/* ==========================================================================
   Color Scheme & Theme Variables
   ========================================================================== */

:root {
  /* Primary Color: #00ae1f */
  --primary-h: 138;
  --primary-s: 100%;
  --primary-l: 34%;

  /* Semantic Colors */
  --color-primary: hsl(var(--primary-h) var(--primary-s) var(--primary-l));
  --color-primary-hover: hsl(
    var(--primary-h) var(--primary-s) calc(var(--primary-l) - 5%)
  );
  --color-primary-light: hsl(
    var(--primary-h) calc(var(--primary-s) - 20%) calc(var(--primary-l) + 45%)
  );
  --color-primary-dark: hsl(
    var(--primary-h) var(--primary-s) calc(var(--primary-l) - 10%)
  );

  /* Transitions */
  --transition-duration: 0.3s;
  --transition-timing: cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-index Scale */
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;

  /* Layout */
  --header-height: 4.5rem;
  --container-padding: 1rem;

  /* Typography */
  --font-family: "Inter", system-ui, -apple-system, sans-serif;
  --font-size-base: 1rem;
  --line-height-base: 1.5;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1),
    0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1),
    0 8px 10px -6px rgb(0 0 0 / 0.1);

  color-scheme: light dark;
}

/* Light Theme (Default) */
:root,
[data-theme="light"] {
  --color-background: #ffffff;
  --color-surface: #f8fafb;
  --color-surface-elevated: #ffffff;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;

  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;
  --color-text-inverse: #ffffff;

  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  --color-info: #3b82f6;

  --shadow-color: 0 0% 0%;
}

/* Dark Theme */
[data-theme="dark"] {
  --color-background: #0f172a;
  --color-surface: #1e293b;
  --color-surface-elevated: #334155;
  --color-border: #334155;
  --color-border-light: #1e293b;

  --color-text: #f1f5f9;
  --color-text-secondary: #94a3b8;
  --color-text-muted: #64748b;
  --color-text-inverse: #0f172a;

  --color-primary-light: hsl(
    var(--primary-h) calc(var(--primary-s) - 30%) calc(var(--primary-l) - 15%)
  );

  --shadow-color: 0 0% 0%;
}

/* System Preference Detection */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-background: #0f172a;
    --color-surface: #1e293b;
    --color-surface-elevated: #334155;
    --color-border: #334155;
    --color-border-light: #1e293b;

    --color-text: #f1f5f9;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    --color-text-inverse: #0f172a;

    --color-primary-light: hsl(
      var(--primary-h) calc(var(--primary-s) - 30%) calc(var(--primary-l) - 15%)
    );
  }
}

/* ==========================================================================
   Base Styles
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--transition-duration)
      var(--transition-timing),
    color var(--transition-duration) var(--transition-timing);
}

/* Prevent FOUC with @starting-style */
@starting-style {
  body {
    opacity: 0;
  }
}

body.loaded {
  opacity: 1;
}

/* ==========================================================================
   Skip Link
   ========================================================================== */

.skip-link {
  position: absolute;
  top: -100%;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.75rem 1.5rem;
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  z-index: var(--z-tooltip);
  transition: top var(--transition-duration) var(--transition-timing);
}

.skip-link:focus {
  top: 1rem;
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background-color: var(--color-background);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-duration)
      var(--transition-timing),
    border-color var(--transition-duration) var(--transition-timing);
}

.site-header .navbar {
  min-height: var(--header-height);
  padding-block: 0.5rem;
}

/* Logo */
.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background-color: var(--color-primary);
  color: white;
  border-radius: var(--radius-md);
  font-size: 1.25rem;
}

.logo-accent {
  color: var(--color-primary);
}

/* Desktop Navigation */
.navbar-nav .nav-link {
  padding: 0.5rem 1rem;
  color: var(--color-text-secondary);
  font-weight: 500;
  transition: color var(--transition-duration) var(--transition-timing);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link:focus,
.navbar-nav .nav-link.active {
  color: var(--color-primary);
}

/* Dropdown Styles */
.dropdown-menu {
  padding: 0.5rem;
  background-color: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.dropdown-item {
  padding: 0.625rem 1rem;
  color: var(--color-text);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-duration)
      var(--transition-timing),
    color var(--transition-duration) var(--transition-timing);
}

.dropdown-item:hover,
.dropdown-item:focus {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

/* 3-Level Dropdown */
.dropdown-submenu {
  position: relative;
}

.dropdown-submenu > .dropdown-menu {
  top: 0;
  left: 100%;
  margin-left: 0.25rem;
  display: none;
}

.dropdown-submenu:hover > .dropdown-menu,
.dropdown-submenu:focus-within > .dropdown-menu {
  display: block;
}

.dropdown-submenu > .dropdown-toggle::after {
  display: inline-block;
  margin-left: auto;
  vertical-align: middle;
  content: "";
  border-top: 0.3em solid transparent;
  border-right: 0;
  border-bottom: 0.3em solid transparent;
  border-left: 0.3em solid;
}

/* ==========================================================================
   Theme Toggle
   ========================================================================== */

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text);
  cursor: pointer;
  transition: background-color var(--transition-duration)
      var(--transition-timing),
    border-color var(--transition-duration) var(--transition-timing),
    transform var(--transition-duration) var(--transition-timing);
  margin-right: 0.5rem;
}

.theme-toggle:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary);
  transform: rotate(15deg);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.theme-icon-dark {
  display: none;
}

[data-theme="dark"] .theme-icon-light {
  display: none;
}

[data-theme="dark"] .theme-icon-dark {
  display: block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-icon-light {
    display: none;
  }

  :root:not([data-theme="light"]) .theme-icon-dark {
    display: block;
  }
}

/* ==========================================================================
   Mobile Menu Toggle (Hamburger)
   ========================================================================== */

.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  background: transparent;
  border: none;
  cursor: pointer;
  z-index: calc(var(--z-modal) + 1);
}

.hamburger-line {
  display: block;
  width: 1.5rem;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition-duration) var(--transition-timing),
    opacity var(--transition-duration) var(--transition-timing);
}

.hamburger-line:nth-child(1) {
  transform: translateY(-6px);
}

.hamburger-line:nth-child(3) {
  transform: translateY(6px);
}

/* Hamburger Animation - Open State */
.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(1) {
  transform: translateY(0) rotate(45deg);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger-line:nth-child(3) {
  transform: translateY(0) rotate(-45deg);
}

@media (max-width: 991.98px) {
  .mobile-menu-toggle {
    display: flex;
  }

  #desktop-nav {
    display: none !important;
  }
}

/* ==========================================================================
   Mobile Menu
   ========================================================================== */

.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--color-background);
  z-index: var(--z-modal);
  visibility: hidden;
  opacity: 0;
  transition: visibility 0s linear var(--transition-duration),
    opacity var(--transition-duration) var(--transition-timing);
}

.mobile-menu[aria-hidden="false"] {
  visibility: visible;
  opacity: 1;
  transition: visibility 0s linear 0s,
    opacity var(--transition-duration) var(--transition-timing);
}

.mobile-menu-container {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

/* Menu Levels */
.mobile-menu-level {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  background-color: var(--color-background);
  transform: translateX(100%);
  transition: transform var(--transition-duration) var(--transition-timing);
  overflow-y: auto;
}

.mobile-menu-level.active {
  transform: translateX(0);
}

.mobile-menu-level.previous {
  transform: translateX(-30%);
}

.mobile-menu-level-1 {
  transform: translateX(0);
}

.mobile-menu[aria-hidden="true"] .mobile-menu-level-1 {
  transform: translateX(0);
}

/* Menu Header */
.mobile-menu-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.5rem;
  min-height: var(--header-height);
  border-bottom: 1px solid var(--color-border);
}

.mobile-menu-title {
  flex: 1;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text);
}

.mobile-menu-back,
.mobile-menu-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text);
  cursor: pointer;
  transition: background-color var(--transition-duration)
      var(--transition-timing),
    border-color var(--transition-duration) var(--transition-timing);
}

.mobile-menu-back:hover,
.mobile-menu-close:hover {
  background-color: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Menu Navigation */
.mobile-menu-nav {
  flex: 1;
  padding: 1rem 0;
}

.mobile-menu-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.mobile-menu-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 1rem 1.5rem;
  background: transparent;
  border: none;
  color: var(--color-text);
  font-size: 1rem;
  font-weight: 500;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition-duration)
      var(--transition-timing),
    color var(--transition-duration) var(--transition-timing);
}

.mobile-menu-link:hover,
.mobile-menu-link:focus {
  background-color: var(--color-primary-light);
  color: var(--color-primary);
}

.mobile-menu-link.active {
  color: var(--color-primary);
}

.mobile-menu-link i {
  font-size: 0.875rem;
  transition: transform var(--transition-duration) var(--transition-timing);
}

.mobile-menu-link.has-submenu:hover i {
  transform: translateX(4px);
}

/* Menu Footer */
.mobile-menu-footer {
  padding: 1.5rem;
  border-top: 1px solid var(--color-border);
}

[data-theme="light"] .navbar-brand {
  .logo-light {
    display: block;
    height: 55px;
  }

  .logo-dark {
    display: none;
    height: 55px;
  }
}

[data-theme="dark"] .navbar-brand {
  .logo-light {
    display: none;
    height: 55px;
  }

  .logo-dark {
    display: block;
    height: 55px;
  }
}