/* Mobile Sidebar Navigation
   This file contains styles for the slide-in sidebar navigation on mobile devices
*/

:root {
    --sidebar-width: 280px;
    --sidebar-background: rgba(255, 255, 255, 0.98);
    --sidebar-backdrop: rgba(0, 0, 0, 0.7);
    --sidebar-animation: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --sidebar-shadow: -5px 0 20px rgba(0, 0, 0, 0.15);
    --sidebar-z-index: 1000;
    --sidebar-item-spacing: 1rem;
    --sidebar-padding: 2rem 1.5rem;
    --hamburger-bar-width: 30px;
    --hamburger-bar-height: 2px;
    --hamburger-bar-spacing: 8px;
    --hamburger-bar-color: var(--text-color);
    --hamburger-active-color: var(--primary-color);
}

/* Sidebar overlay */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--sidebar-backdrop);
    z-index: calc(var(--sidebar-z-index) - 1);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--sidebar-animation), visibility var(--sidebar-animation);
    -webkit-tap-highlight-color: transparent;
}

/* Sidebar container */
.sidebar-nav {
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    width: var(--sidebar-width);
    max-width: 80vw;
    background-color: var(--sidebar-background);
    box-shadow: var(--sidebar-shadow);
    z-index: var(--sidebar-z-index);
    transform: translateX(-100%);
    transition: transform var(--sidebar-animation);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding-top: 20px; /* Reduced from 80px to accommodate logo */
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

/* Sidebar logo */
.sidebar-logo {
    padding: 0.5rem 1.5rem 1.5rem;
    display: flex;
    justify-content: center;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    margin-bottom: 1rem;
}

.sidebar-logo img {
    height: 48px;
    width: auto;
    transition: transform 0.2s ease;
}

.sidebar-logo a:hover img {
    transform: scale(1.05);
}

/* When sidebar is active */
.sidebar-active .sidebar-overlay {
    opacity: 1;
    visibility: visible;
}

.sidebar-active .sidebar-nav {
    transform: translateX(0);
}

/* Sidebar navigation items */
.sidebar-nav-items {
    list-style: none;
    padding: var(--sidebar-padding);
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--sidebar-item-spacing);
}

.sidebar-nav-items li {
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity var(--sidebar-animation), transform var(--sidebar-animation);
    transition-delay: calc(var(--item-index) * 0.05s);
}

.sidebar-active .sidebar-nav-items li {
    opacity: 1;
    transform: translateX(0);
}

.sidebar-nav-items a {
    display: block;
    padding: 1rem;
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    border-radius: 8px;
    transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
    font-size: 1.1rem;
}

.sidebar-nav-items a:hover,
.sidebar-nav-items a.active {
    background-color: var(--primary-color);
    color: white;
    transform: translateX(5px);
}

.sidebar-nav-items a.active {
    background-color: var(--secondary-color);
}

/* Header modifications for sidebar */
.navbar {
    transition: transform 0.3s ease;
}

.navbar.sidebar-active {
    box-shadow: none;
}

/* Hamburger menu button */
.hamburger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: var(--hamburger-bar-width);
    height: calc(var(--hamburger-bar-height) * 2 + var(--hamburger-bar-spacing) * 2);
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: calc(var(--sidebar-z-index) + 10);
    position: relative;
}

.hamburger-menu span {
    display: block;
    width: 100%;
    height: var(--hamburger-bar-height);
    background-color: var(--hamburger-bar-color);
    transition: transform 0.3s ease, opacity 0.3s ease, background-color 0.3s ease;
    transform-origin: center;
    border-radius: 2px;
}

.sidebar-active .hamburger-menu span {
    background-color: var(--hamburger-active-color);
}

.sidebar-active .hamburger-menu span:first-child {
    transform: translateY(calc(var(--hamburger-bar-spacing) + var(--hamburger-bar-height))) rotate(45deg);
}

.sidebar-active .hamburger-menu span:nth-child(2) {
    opacity: 0;
    transform: scale(0);
}

.sidebar-active .hamburger-menu span:last-child {
    transform: translateY(calc(-1 * (var(--hamburger-bar-spacing) + var(--hamburger-bar-height)))) rotate(-45deg);
}

/* Donate button in sidebar */
.sidebar-nav .donate-btn {
    margin: 1.5rem auto;
    width: calc(100% - 3rem);
    text-align: center;
    transform: scale(1);
    transition: all 0.3s ease;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50px;
    padding: 12px 24px;
    font-weight: 600;
}

.sidebar-nav .donate-btn:hover {
    transform: scale(1.05);
    background-color: var(--secondary-color);
}

/* Sidebar footer */
.sidebar-footer {
    margin-top: auto;
    padding: 1.5rem;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.sidebar-footer .social-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.sidebar-footer .social-links a {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: white;
    opacity: 1;
    transition: all 0.3s ease;
    background: var(--primary-color);
    border-radius: 50%;
    text-decoration: none;
}

.sidebar-footer .social-links a:hover {
    transform: translateY(-3px);
    background-color: var(--secondary-color);
    color: white;
    opacity: 1;
}

/* Media queries for responsive behavior */
@media (min-width: 968px) {
    .sidebar-nav,
    .sidebar-overlay,
    .hamburger-menu {
        display: none;
    }
}

@media (max-width: 968px) {
    .hamburger-menu {
        display: flex;
    }
    
    .nav-menu .nav-links {
        display: none;
    }
    
    .desktop-only {
        display: none !important;
    }
}

/* Animation for page content when sidebar is open */
.page-content {
    transition: transform 0.3s ease;
}

.sidebar-active .page-content {
    transform: translateX(80px);
}

/* Additional accessibility enhancements */
.hamburger-menu:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.sidebar-nav:focus-visible {
    outline: 2px solid var(--primary-color);
}

/* Additional responsive adjustments */
@media (max-width: 480px) {
    :root {
        --sidebar-width: 250px;
        --hamburger-bar-width: 24px;
    }
    
    .sidebar-nav-items a {
        font-size: 1rem;
    }
    
    .sidebar-nav {
        padding-top: 15px;
    }
    
    .sidebar-logo img {
        height: 40px;
    }
}