/* Mobile Navigation Modern Update - "Sleeper" Aesthetic */

/* --- Variables --- */
:root {
  --mn-bg-light: rgba(255, 255, 255, 0.95);
  --mn-bg-dark: rgba(20, 20, 20, 0.95); /* Deep black/grey */
  --mn-backdrop-blur: 16px;
  --mn-text-primary-light: #111827;
  --mn-text-primary-dark: #F9FAFB;
  --mn-text-secondary-light: #6B7280;
  --mn-text-secondary-dark: #9CA3AF;
  --mn-accent-color: #5D5FEF;
  --mn-border-light: rgba(0, 0, 0, 0.05);
  --mn-border-dark: rgba(255, 255, 255, 0.08);
  --mn-item-hover-light: rgba(0, 0, 0, 0.03);
  --mn-item-hover-dark: rgba(255, 255, 255, 0.05);
  --mn-shadow: -10px 0 30px rgba(0,0,0,0.15);
  --mn-transition: all 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);
  --mn-font-family: 'Poppins', 'Inter', -apple-system, sans-serif;
}

/* --- Mobile Menu Container --- */
@media (max-width: 991px) {
  .mobile-menu {
    background: var(--mn-bg-light) !important;
    backdrop-filter: blur(var(--mn-backdrop-blur));
    -webkit-backdrop-filter: blur(var(--mn-backdrop-blur));
    box-shadow: var(--mn-shadow);
    border-left: 1px solid var(--mn-border-light);
    width: 300px !important; /* Fixed width sidebar style instead of full screen if possible, but keeping full width for safety if layout depends on it. Let's stick to user request "cleaner". Full width is often cleaner on mobile. */
    width: 85% !important; /* Sleek side drawer */
    max-width: 400px !important;
    right: 0 !important;
    left: auto !important; /* Slide from right */
    transform: translateX(100%) !important; /* Start off-screen right */
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), visibility 0s linear 0.4s, opacity 0.4s ease !important;
    padding: 0 !important; /* Remove default padding */
    z-index: 10000 !important;
  }

  /* Overlay Backdrop */
  .mobile-menu::before {
    content: '';
    position: fixed;
    top: 0;
    left: -100vw; /* Extend to cover the rest of the screen */
    width: 200vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
    z-index: -1;
  }

  .mobile-menu.active {
    transform: translateX(0) !important;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), visibility 0s linear 0s, opacity 0.4s ease !important;
  }

  .mobile-menu.active::before {
    opacity: 1;
    pointer-events: auto;
  }

  /* --- Navigation List --- */
  .mobile-nav {
    margin-top: 0 !important;
    height: 100% !important;
    overflow-y: auto !important;
    padding: 80px 0 40px 0 !important; /* Space for close button at top */
    /* Scrollbar styling */
    scrollbar-width: thin;
    scrollbar-color: var(--mn-text-secondary-light) transparent;
  }

  .mobile-nav-list {
    padding: 0 16px !important;
  }

  /* --- Navigation Items --- */
  .mobile-nav-list > li {
    margin-bottom: 8px !important;
  }

  .mobile-nav-list > li > a {
    display: flex !important;
    align-items: center !important;
    padding: 14px 16px !important;
    font-family: var(--mn-font-family) !important;
    font-size: 15px !important;
    font-weight: 500 !important;
    color: var(--mn-text-primary-light) !important;
    border-radius: 12px !important;
    transition: var(--mn-transition) !important;
    border: 1px solid #e5e7eb !important;
    background-color: #ffffff !important;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1) !important;
    text-decoration: none !important;
  }

  .mobile-nav-list > li > a i {
    width: 24px !important;
    margin-right: 12px !important;
    font-size: 18px !important;
    color: var(--mn-text-secondary-light) !important;
    transition: color 0.2s ease !important;
    text-align: center !important;
  }

  /* Hover State */
  .mobile-nav-list > li > a:hover,
  .mobile-nav-list > li > a:active {
    background-color: var(--mn-item-hover-light) !important;
    color: var(--mn-accent-color) !important;
    transform: translateX(4px);
  }

  .mobile-nav-list > li > a:hover i,
  .mobile-nav-list > li > a:active i {
    color: var(--mn-accent-color) !important;
  }

  /* Active State */
  .mobile-nav-item.active a {
    background-color: rgba(93, 95, 239, 0.1) !important;
    color: var(--mn-accent-color) !important;
    font-weight: 600 !important;
    box-shadow: inset 4px 0 0 var(--mn-accent-color) !important;
  }

  .mobile-nav-item.active a i {
    color: var(--mn-accent-color) !important;
  }

  /* --- Sections --- */
  .mobile-nav-section {
    margin-top: 24px !important;
    margin-bottom: 8px !important;
    padding: 0 16px !important;
  }

  .mobile-nav-section h3 {
    font-family: var(--mn-font-family) !important;
    font-size: 11px !important;
    text-transform: uppercase !important;
    letter-spacing: 1.5px !important;
    color: var(--mn-text-secondary-light) !important;
    font-weight: 600 !important;
    opacity: 0.8 !important;
  }

  /* --- Featured Button (Generate Workout) --- */
  .mobile-nav-item.featured {
    margin-bottom: 24px !important;
  }

  .mobile-nav-item.featured a {
    background: linear-gradient(135deg, #111827, #374151) !important; /* Sleeper dark gradient */
    color: #FFFFFF !important;
    justify-content: center !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15) !important;
    padding: 16px !important;
    font-weight: 600 !important;
    letter-spacing: 0.5px !important;
  }

  .mobile-nav-item.featured a i {
    color: #FFFFFF !important;
  }

  .mobile-nav-item.featured a:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2) !important;
    background: linear-gradient(135deg, #000000, #1f2937) !important;
  }

  /* --- Close Button --- */
  .close-menu {
    top: 20px !important;
    right: 20px !important;
    width: 40px !important;
    height: 40px !important;
    background: transparent !important;
    border: 1px solid var(--mn-border-light) !important;
    border-radius: 50% !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    color: var(--mn-text-primary-light) !important;
    transition: var(--mn-transition) !important;
    box-shadow: none !important;
  }

  .close-menu:hover {
    background: var(--mn-item-hover-light) !important;
    transform: rotate(90deg) !important;
  }

  /* --- User Profile Header --- */
  #mobileAuthHeader {
    margin-bottom: 20px !important;
    padding-bottom: 20px !important;
    border-bottom: 1px solid var(--mn-border-light) !important;
  }

  #mobileAuthHeader a {
    background: transparent !important;
    padding: 0 !important;
    font-size: 16px !important;
    font-weight: 600 !important;
    border: none !important;
    box-shadow: none !important;
  }

  #mobileAuthHeader i {
    font-size: 32px !important; /* Larger avatar icon */
    color: var(--mn-text-primary-light) !important;
    background: var(--mn-item-hover-light);
    width: 48px !important;
    height: 48px !important;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin-right: 16px !important;
  }

  /* --- Dark Mode Support --- */
  [data-theme="dark"] .mobile-menu {
    background: var(--mn-bg-dark) !important;
    border-left: 1px solid var(--mn-border-dark);
  }

  [data-theme="dark"] .mobile-nav-list > li > a {
    color: var(--mn-text-primary-dark) !important;
    background-color: #1f2937 !important;
    border-color: #374151 !important;
  }

  [data-theme="dark"] .mobile-nav-list > li > a i {
    color: var(--mn-text-secondary-dark) !important;
  }

  [data-theme="dark"] .mobile-nav-list > li > a:hover,
  [data-theme="dark"] .mobile-nav-list > li > a:active {
    background-color: var(--mn-item-hover-dark) !important;
    color: #FFFFFF !important;
  }

  /* Active State Dark Mode */
  [data-theme="dark"] .mobile-nav-item.active a {
    background-color: rgba(93, 95, 239, 0.2) !important;
    color: #FFFFFF !important;
    box-shadow: inset 4px 0 0 var(--mn-accent-color) !important;
    border-color: rgba(93, 95, 239, 0.3) !important;
  }

  [data-theme="dark"] .mobile-nav-item.active a i {
    color: var(--mn-accent-color) !important;
  }

  [data-theme="dark"] .mobile-nav-section h3 {
    color: var(--mn-text-secondary-dark) !important;
  }

  [data-theme="dark"] .close-menu {
    border-color: var(--mn-border-dark) !important;
    color: var(--mn-text-primary-dark) !important;
  }

  [data-theme="dark"] .close-menu:hover {
    background: var(--mn-item-hover-dark) !important;
  }

  [data-theme="dark"] #mobileAuthHeader {
    border-bottom-color: var(--mn-border-dark) !important;
  }

  [data-theme="dark"] #mobileAuthHeader i {
    background: var(--mn-item-hover-dark);
    color: var(--mn-text-primary-dark) !important;
  }

  [data-theme="dark"] .mobile-nav-item.featured a {
    background: linear-gradient(135deg, #5D5FEF, #4F46E5) !important; /* Pop of color in dark mode */
    box-shadow: 0 4px 15px rgba(93, 95, 239, 0.3) !important;
  }

  /* Scrollbar Dark Mode */
  [data-theme="dark"] .mobile-nav {
    scrollbar-color: var(--mn-text-secondary-dark) transparent;
  }
}