/* 
 * Collapsible Menu System for Desktop Mode
 * Allows users to collapse the sidebar for more screen space
 */

/* =================
   HEADER DARK THEME STYLING
   ================= */

/* Main header dark styling */
#header {
    background: linear-gradient(135deg, #1a1a1a 0%, #0f0f0f 100%);
    border-right: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 4px 0 20px rgba(0, 0, 0, 0.3);
}

/* Profile section styling */
#header .profile-img {
    border: 3px solid rgba(20, 157, 221, 0.5);
    box-shadow: 0 0 20px rgba(20, 157, 221, 0.3);
    transition: all 0.3s ease;
}

#header .profile-img:hover {
    border-color: #149ddd;
    box-shadow: 0 0 30px rgba(20, 157, 221, 0.5);
}

/* Site name styling */
#header .sitename {
    color: #ffffff;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    letter-spacing: 1px;
}

#header .sitename:hover {
    color: #149ddd;
    transition: color 0.3s ease;
}

/* Social links dark styling */
#header .social-links {
    padding: 20px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

#header .social-links a {
    background: rgba(255, 255, 255, 0.05);
    color: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

#header .social-links a:hover {
    background: rgba(20, 157, 221, 0.2);
    color: #149ddd;
    border-color: #149ddd;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(20, 157, 221, 0.3);
}

/* =================
   DESKTOP COLLAPSE TOGGLE
   ================= */
.header-collapse {
    position: absolute;
    top: 15px;
    right: -20px;
    background: linear-gradient(135deg, #149ddd 0%, #0d8abc 100%);
    color: white;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 1001;
    transition: all 0.3s ease;
    box-shadow: 0 6px 20px rgba(20, 157, 221, 0.4);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.header-collapse:hover {
    background: linear-gradient(135deg, #0d8abc 0%, #0a6b94 100%);
    transform: scale(1.1);
    box-shadow: 0 8px 25px rgba(20, 157, 221, 0.5);
    border-color: rgba(255, 255, 255, 0.3);
}

.header-collapse:active {
    transform: scale(0.95);
}

/* Rotate arrow when collapsed */
body.menu-collapsed .header-collapse {
    transform: rotate(180deg);
    right: -15px;
}

body.menu-collapsed .header-collapse:hover {
    transform: rotate(180deg) scale(1.1);
}

/* =================
   HEADER COLLAPSE STATES
   ================= */
@media (min-width: 1200px) {
    /* Default expanded state */
    #header {
        width: 300px;
        transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
        overflow: hidden;
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
    }

    /* Collapsed state */
    body.menu-collapsed #header {
        width: 80px;
    }

    /* Main content adjustment */
    .main {
        margin-left: 300px;
        transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

    body.menu-collapsed .main {
        margin-left: 80px;
    }

    /* Profile image adjustments */
    #header .profile-img {
        transition: all 0.4s ease;
        margin: 30px auto 20px;
    }

    body.menu-collapsed #header .profile-img {
        margin: 20px auto 10px;
    }

    body.menu-collapsed #header .profile-img img {
        width: 50px;
        height: 50px;
    }

    /* Logo/sitename adjustments */
    #header .logo {
        transition: all 0.4s ease;
        opacity: 1;
        transform: scale(1);
    }

    body.menu-collapsed #header .logo {
        opacity: 0;
        transform: scale(0.8);
        pointer-events: none;
    }

    body.menu-collapsed #header .sitename {
        font-size: 0;
        margin: 0;
    }

    /* Social links adjustments */
    #header .social-links {
        transition: all 0.4s ease;
        opacity: 1;
        margin: 20px 0;
    }

    body.menu-collapsed #header .social-links {
        opacity: 0;
        margin: 10px 0;
        pointer-events: none;
    }

    /* Navigation menu adjustments */
    #header .navmenu {
        transition: all 0.4s ease;
        padding: 0 20px;
        margin-top: 30px;
    }

    body.menu-collapsed #header .navmenu {
        padding: 0 5px;
    }

    #header .navmenu ul {
        list-style: none;
        padding: 0;
        margin: 0;
    }

    #header .navmenu li {
        position: relative;
        margin: 8px 0;
    }

    /* Enhanced navigation menu styling */
    #header .navmenu a {
        display: flex;
        align-items: center;
        padding: 15px 20px;
        color: rgba(255, 255, 255, 0.8);
        text-decoration: none;
        border-radius: 12px;
        transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        font-weight: 500;
        letter-spacing: 0.5px;
        background: rgba(255, 255, 255, 0.03);
        border: 1px solid rgba(255, 255, 255, 0.05);
        backdrop-filter: blur(5px);
        position: relative;
        overflow: hidden;
    }

    /* Animated background effect */
    #header .navmenu a::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(20, 157, 221, 0.1), transparent);
        transition: left 0.5s ease;
        z-index: 1;
    }

    #header .navmenu a:hover::before {
        left: 100%;
    }

    #header .navmenu a:hover,
    #header .navmenu a.active {
        background: linear-gradient(135deg, rgba(20, 157, 221, 0.15) 0%, rgba(20, 157, 221, 0.25) 100%);
        color: #ffffff;
        transform: translateX(8px) scale(1.02);
        box-shadow: 0 8px 25px rgba(20, 157, 221, 0.2), inset 0 1px 0 rgba(255, 255, 255, 0.1);
        border-color: rgba(20, 157, 221, 0.3);
    }

    #header .navmenu a.active {
        background: linear-gradient(135deg, rgba(20, 157, 221, 0.2) 0%, rgba(20, 157, 221, 0.3) 100%);
        color: #149ddd;
        font-weight: 600;
        box-shadow: 0 8px 25px rgba(20, 157, 221, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    }

    /* Enhanced navigation icons */
    #header .navmenu i.navicon {
        margin-right: 15px;
        font-size: 20px;
        min-width: 24px;
        transition: all 0.3s ease;
        color: rgba(20, 157, 221, 0.8);
        text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
        position: relative;
        z-index: 2;
    }

    #header .navmenu a:hover i.navicon,
    #header .navmenu a.active i.navicon {
        color: #149ddd;
        transform: scale(1.1);
        text-shadow: 0 0 8px rgba(20, 157, 221, 0.5);
    }

    /* Enhanced collapsed navigation adjustments */
    body.menu-collapsed #header .navmenu a {
        padding: 18px 12px;
        justify-content: center;
        border-radius: 15px;
        margin: 8px 0;
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid rgba(255, 255, 255, 0.08);
    }

    body.menu-collapsed #header .navmenu a:hover {
        background: linear-gradient(135deg, rgba(20, 157, 221, 0.2) 0%, rgba(20, 157, 221, 0.3) 100%);
        transform: scale(1.05);
        box-shadow: 0 8px 25px rgba(20, 157, 221, 0.3);
    }

    body.menu-collapsed #header .navmenu a span {
        opacity: 0;
        width: 0;
        overflow: hidden;
        white-space: nowrap;
        transition: all 0.3s ease;
    }

    body.menu-collapsed #header .navmenu i.navicon {
        margin-right: 0;
        font-size: 24px;
        color: rgba(20, 157, 221, 0.9);
    }

    body.menu-collapsed #header .navmenu a:hover i.navicon {
        color: #149ddd;
        transform: scale(1.2);
        text-shadow: 0 0 10px rgba(20, 157, 221, 0.6);
    }

    /* Tooltip for collapsed menu items */
    body.menu-collapsed #header .navmenu li {
        position: relative;
    }

    /* Enhanced tooltips for collapsed menu */
    body.menu-collapsed #header .navmenu li::before {
        content: attr(data-tooltip);
        position: absolute;
        left: 75px;
        top: 50%;
        transform: translateY(-50%);
        background: linear-gradient(135deg, rgba(0, 0, 0, 0.95) 0%, rgba(20, 20, 20, 0.95) 100%);
        color: #ffffff;
        padding: 12px 16px;
        border-radius: 10px;
        font-size: 14px;
        font-weight: 600;
        white-space: nowrap;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        z-index: 1002;
        backdrop-filter: blur(15px);
        border: 1px solid rgba(20, 157, 221, 0.3);
        box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(255, 255, 255, 0.1);
        letter-spacing: 0.5px;
    }

    body.menu-collapsed #header .navmenu li:hover::before {
        opacity: 1;
        visibility: visible;
        left: 85px;
        transform: translateY(-50%) scale(1.02);
    }

    /* Enhanced tooltip arrow */
    body.menu-collapsed #header .navmenu li::after {
        content: '';
        position: absolute;
        left: 68px;
        top: 50%;
        transform: translateY(-50%);
        border: 8px solid transparent;
        border-right-color: rgba(0, 0, 0, 0.95);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        z-index: 1002;
        filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
    }

    body.menu-collapsed #header .navmenu li:hover::after {
        opacity: 1;
        visibility: visible;
        left: 75px;
    }
}

/* =================
   ANIMATION ENHANCEMENTS
   ================= */
@media (min-width: 1200px) {
    /* Smooth reveal animation for expanding menu */
    body:not(.menu-collapsed) #header .logo,
    body:not(.menu-collapsed) #header .social-links {
        animation: fadeInScale 0.4s ease-out 0.2s both;
    }

    body:not(.menu-collapsed) #header .navmenu a span {
        animation: slideInRight 0.3s ease-out;
    }

    @keyframes fadeInScale {
        from {
            opacity: 0;
            transform: scale(0.9);
        }
        to {
            opacity: 1;
            transform: scale(1);
        }
    }

    @keyframes slideInRight {
        from {
            opacity: 0;
            transform: translateX(-20px);
        }
        to {
            opacity: 1;
            transform: translateX(0);
        }
    }

    /* Pulse animation for collapse button */
    .header-collapse {
        animation: pulseGlow 3s ease-in-out infinite;
    }

    @keyframes pulseGlow {
        0%, 100% {
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        }
        50% {
            box-shadow: 0 4px 12px rgba(20, 157, 221, 0.3);
        }
    }

    /* Stop pulsing on hover or after interaction */
    .header-collapse:hover,
    body.menu-collapsed .header-collapse,
    body.menu-interacted .header-collapse {
        animation: none;
    }
}

/* =================
   ACCESSIBILITY ENHANCEMENTS
   ================= */
@media (min-width: 1200px) {
    .header-collapse:focus {
        outline: 2px solid #149ddd;
        outline-offset: 2px;
    }

    body.menu-collapsed #header .navmenu a:focus {
        outline: 2px solid #149ddd;
        outline-offset: 2px;
    }

    /* Ensure tooltips are readable */
    @media (prefers-contrast: high) {
        body.menu-collapsed #header .navmenu li::before {
            background: #000;
            border: 2px solid #fff;
        }
        
        body.menu-collapsed #header .navmenu li::after {
            border-right-color: #000;
        }
    }

    /* Respect reduced motion preferences */
    @media (prefers-reduced-motion: reduce) {
        #header,
        .main,
        #header .profile-img,
        #header .logo,
        #header .social-links,
        #header .navmenu,
        #header .navmenu a,
        .header-collapse {
            transition: none;
        }

        .header-collapse {
            animation: none;
        }
    }
}

/* =================
   RESPONSIVE BEHAVIOR
   ================= */
/* Ensure mobile behavior is unchanged */
@media (max-width: 1199px) {
    .header-collapse {
        display: none !important;
    }
    
    body.menu-collapsed #header {
        width: auto;
    }
    
    body.menu-collapsed .main {
        margin-left: 0;
    }
}

/* Tablet adjustments */
@media (min-width: 768px) and (max-width: 1199px) {
    #header {
        width: auto;
    }
    
    .main {
        margin-left: 0;
    }
}

/* =================
   PERFORMANCE OPTIMIZATIONS
   ================= */
@media (min-width: 1200px) {
    /* Use transform for better performance */
    #header,
    .main {
        will-change: transform, width;
    }

    /* Optimize text rendering during transitions */
    body.menu-transitioning * {
        pointer-events: none;
    }
}

/* =================
   MOBILE MENU STYLING
   ================= */
@media (max-width: 1199px) {
    /* Mobile header dark theme */
    #header {
        background: linear-gradient(135deg, #1a1a1a 0%, #0f0f0f 100%);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        backdrop-filter: blur(10px);
    }
    
    /* Mobile menu button styling */
    .mobile-nav-toggle {
        background: linear-gradient(135deg, #149ddd 0%, #0d8abc 100%);
        color: white;
        border: none;
        border-radius: 8px;
        padding: 10px;
        box-shadow: 0 4px 15px rgba(20, 157, 221, 0.3);
        transition: all 0.3s ease;
    }
    
    .mobile-nav-toggle:hover {
        background: linear-gradient(135deg, #0d8abc 0%, #0a6b94 100%);
        transform: scale(1.05);
        box-shadow: 0 6px 20px rgba(20, 157, 221, 0.4);
    }
    
    /* Mobile navigation menu */
    .mobile-nav-active #header .navmenu {
        background: rgba(0, 0, 0, 0.95);
        backdrop-filter: blur(15px);
        border: 1px solid rgba(255, 255, 255, 0.1);
    }
    
    .mobile-nav-active #header .navmenu ul {
        padding: 20px;
    }
    
    .mobile-nav-active #header .navmenu a {
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid rgba(255, 255, 255, 0.1);
        margin: 8px 0;
        padding: 15px 20px;
        border-radius: 10px;
        color: rgba(255, 255, 255, 0.9);
        transition: all 0.3s ease;
    }
    
    .mobile-nav-active #header .navmenu a:hover {
        background: linear-gradient(135deg, rgba(20, 157, 221, 0.2) 0%, rgba(20, 157, 221, 0.3) 100%);
        color: #149ddd;
        transform: translateX(5px);
        box-shadow: 0 5px 15px rgba(20, 157, 221, 0.2);
    }
}

/* =================
   ADDITIONAL ENHANCEMENTS
   ================= */

/* Scrollbar styling for navigation */
@media (min-width: 1200px) {
    #header .navmenu::-webkit-scrollbar {
        width: 6px;
    }
    
    #header .navmenu::-webkit-scrollbar-track {
        background: rgba(255, 255, 255, 0.05);
        border-radius: 3px;
    }
    
    #header .navmenu::-webkit-scrollbar-thumb {
        background: rgba(20, 157, 221, 0.3);
        border-radius: 3px;
    }
    
    #header .navmenu::-webkit-scrollbar-thumb:hover {
        background: rgba(20, 157, 221, 0.5);
    }
}

/* Header backdrop effect */
#header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at top, rgba(20, 157, 221, 0.05) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* Ensure content is above backdrop */
#header > * {
    position: relative;
    z-index: 1;
}

/* =================
   DARK MODE SUPPORT
   ================= */
@media (prefers-color-scheme: dark) {
    .header-collapse {
        background: linear-gradient(135deg, #149ddd 0%, #0d8abc 100%);
        border-color: rgba(255, 255, 255, 0.3);
    }
    
    body.menu-collapsed #header .navmenu li::before {
        background: linear-gradient(135deg, rgba(0, 0, 0, 0.95) 0%, rgba(20, 20, 20, 0.95) 100%);
        border-color: rgba(20, 157, 221, 0.3);
    }
    
    body.menu-collapsed #header .navmenu li::after {
        border-right-color: rgba(0, 0, 0, 0.95);
    }
}