/* Enhanced Modern Header Styles */
.header {
    background: rgba(var(--bg-primary-rgb), 0.95);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(20px) saturate(180%);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    padding: 1.25rem 0;
}

.header .tile-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

/* Add subtle gradient border */
.header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--primary-color) 20%,
        var(--accent-color) 50%,
        var(--primary-color) 80%,
        transparent 100%);
    opacity: 0.3;
}

/* Header hover effect */
.header:hover {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1), 0 2px 4px rgba(0, 0, 0, 0.06);
}

[data-theme="dark"] .header {
    background: rgba(15, 23, 42, 0.95);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .header:hover {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.4), 0 2px 4px rgba(0, 0, 0, 0.3);
}

/* Enhanced Logo */
.logo {
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    letter-spacing: -0.025em;
}

.logo::before {
    content: '';
    position: absolute;
    top: 50%;
    left: -8px;
    width: 4px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 50%;
    transform: translateY(-50%);
    opacity: 0;
    transition: all 0.3s ease;
}

.logo:hover {
    transform: translateY(-1px);
    filter: brightness(1.1);
}

.logo:hover::before {
    opacity: 1;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: translateY(-50%) scale(1); }
    50% { opacity: 0.7; transform: translateY(-50%) scale(1.2); }
}

/* Enhanced Navigation Items (Center) */
.nav-items {
    display: flex;
    align-items: center;
    gap: 2.5rem;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(var(--bg-secondary-rgb), 0.5);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
}

.nav-item {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 600;
    padding: 0.75rem 1.25rem;
    border-radius: 25px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    font-size: 0.875rem;
    letter-spacing: 0.025em;
}

.nav-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 25px;
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

.nav-item:hover {
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.nav-item:hover::before {
    opacity: 0.1;
}

.nav-item.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.nav-item.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-hover), var(--accent-hover));
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

[data-theme="dark"] .nav-items {
    background: rgba(30, 41, 59, 0.96);
    border-color: var(--border-color);
}

/* Admin Navigation Dropdown */
.nav-dropdown {
    position: relative;
}

.admin-nav-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: inherit;
    font-weight: inherit;
}

.admin-dropdown-content {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
}

.nav-dropdown:hover .admin-dropdown-content {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* User Menu (Right) */
.user-menu {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.auth-buttons {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Enhanced User Avatar and Logout */
.user-avatar-link {
    text-decoration: none;
    display: block;
    position: relative;
}

.user-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.875rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    border: 3px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    position: relative;
    overflow: hidden;
}

.user-avatar::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.user-avatar:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
    border-color: rgba(255, 255, 255, 0.4);
}

.user-avatar:hover::before {
    left: 100%;
}

/* Profile Picture Image in Header */
.user-avatar-image {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    position: relative;
    overflow: hidden;
}

.user-avatar-image:hover {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
    border-color: rgba(255, 255, 255, 0.4);
}

.logout-btn {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logout-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Admin Dropdown Styles */
.admin-dropdown-content {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    margin-top: 0.5rem;
}

.nav-dropdown:hover .admin-dropdown-content {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* Dropdown Items */
.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 0.875rem;
}

.dropdown-item:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.dropdown-item svg {
    flex-shrink: 0;
    opacity: 0.7;
}

.dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: 0.5rem 0;
}



/* Enhanced Theme Toggle */
.theme-toggle {
    background: rgba(var(--bg-secondary-rgb), 0.8);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.75rem;
    border-radius: 50%;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.theme-toggle::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: 50%;
}

.theme-toggle:hover {
    transform: scale(1.1) rotate(180deg);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.theme-toggle:hover::before {
    opacity: 1;
}

.theme-toggle .material-icons {
    position: relative;
    z-index: 1;
    transition: transform 0.3s ease;
}

[data-theme="dark"] .theme-toggle {
    background: rgba(30, 41, 59, 0.8);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: rgba(var(--bg-secondary-rgb), 0.8);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(10px);
    position: relative;
    z-index: 1001;
}

.mobile-menu-btn:hover {
    background: rgba(var(--bg-tertiary-rgb), 0.9);
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.hamburger-line {
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    margin: 2px 0;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 2px;
}

/* Hamburger Animation */
.mobile-menu-btn.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active .hamburger-line:nth-child(2) {
    opacity: 0;
    transform: translateX(-20px);
}

.mobile-menu-btn.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Navigation Styles */
@media (max-width: 768px) {
    .header .tile-wrap {
        padding: 0 1rem;
        max-width: 100%;
        overflow: hidden;
    }

    .mobile-menu-btn {
        display: flex;
        flex-shrink: 0;
    }

    .nav-items {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        background: rgba(var(--bg-primary-rgb), 0.98);
        backdrop-filter: blur(20px);
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        transform: translateX(-100%);
        transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
        padding: 2rem;
        border: none;
        border-radius: 0;
        box-sizing: border-box;
    }

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

    .nav-item {
        font-size: 1.25rem;
        font-weight: 700;
        padding: 1rem 2rem;
        border-radius: 16px;
        background: rgba(var(--bg-secondary-rgb), 0.8);
        border: 1px solid var(--border-color);
        width: 280px;
        max-width: 90vw;
        text-align: center;
        backdrop-filter: blur(10px);
        transition: all 0.3s ease;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto;
    }

    .nav-item:hover {
        transform: translateY(-4px) scale(1.05);
        box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
    }

    .nav-dropdown {
        width: 280px;
        max-width: 90vw;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .admin-nav-btn {
        width: 100%;
        justify-content: center;
        margin: 0 auto;
        position: relative;
    }

    .admin-nav-btn svg {
        transition: transform 0.3s ease;
    }

    .nav-dropdown.mobile-active .admin-nav-btn svg {
        transform: rotate(180deg);
    }

    .admin-dropdown-content {
        position: static;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        background: rgba(var(--bg-tertiary-rgb), 0.9);
        margin-top: 1rem;
        border-radius: 16px;
        backdrop-filter: blur(15px);
        width: 100%;
        max-width: 100%;
        min-width: auto;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        max-height: 0;
        overflow: hidden;
    }

    .nav-dropdown:hover .admin-dropdown-content,
    .nav-dropdown.mobile-active .admin-dropdown-content {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        max-height: 300px;
    }

    .admin-dropdown-content a {
        width: 100%;
        justify-content: center;
        text-align: center;
        margin: 0;
        border-radius: 12px;
    }

    .header {
        padding: 1rem 0;
    }

    .user-menu {
        gap: 0.5rem;
    }

    .auth-buttons {
        gap: 0.75rem;
        flex-direction: column;
        width: 100%;
        align-items: center;
    }

    .auth-buttons .nav-item {
        width: 220px;
        max-width: 75vw;
        margin: 0 auto;
        text-align: center;
        font-size: 1rem;
        font-weight: 600;
        padding: 0.75rem 1.5rem;
        border-radius: 12px;
        background: rgba(var(--bg-secondary-rgb), 0.8);
        border: 1px solid var(--border-color);
        backdrop-filter: blur(10px);
        transition: all 0.3s ease;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .auth-buttons .nav-item:hover {
        transform: translateY(-4px) scale(1.05);
        box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
    }

    .auth-buttons .nav-item.btn-primary {
        background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
        color: white;
        border: 1px solid rgba(255, 255, 255, 0.2);
    }

    .auth-buttons .nav-item.btn-primary:hover {
        background: linear-gradient(135deg, var(--primary-hover), var(--accent-hover));
        color: white;
        transform: translateY(-4px) scale(1.05);
        box-shadow: 0 8px 25px rgba(59, 130, 246, 0.4);
    }
}

@media (max-width: 480px) {
    .header {
        padding: 0.75rem 0;
    }

    .header .tile-wrap {
        padding: 0 0.75rem;
        gap: 0.5rem;
    }

    .logo {
        font-size: 1.25rem;
        flex-shrink: 0;
        max-width: calc(100vw - 120px);
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .mobile-menu-btn {
        width: 40px;
        height: 40px;
    }

    .hamburger-line {
        width: 18px;
    }

    .nav-items {
        padding: 1.5rem;
        gap: 1.5rem;
    }

    .nav-item {
        font-size: 1.1rem;
        padding: 0.875rem 1.5rem;
        width: 250px;
        max-width: 85vw;
    }

    .nav-dropdown {
        width: 250px;
        max-width: 85vw;
    }

    .user-avatar {
        width: 36px;
        height: 36px;
        font-size: 0.75rem;
    }

    .user-avatar-image {
        width: 36px;
        height: 36px;
    }

    .theme-toggle {
        padding: 0.625rem;
    }

    .auth-buttons .nav-item {
        width: 200px;
        max-width: 70vw;
        font-size: 0.95rem;
        padding: 0.65rem 1.25rem;
    }
}

/* Extra small mobile devices */
@media (max-width: 320px) {
    .header .tile-wrap {
        padding: 0 0.5rem;
    }

    .logo {
        font-size: 1.1rem;
        max-width: calc(100vw - 100px);
    }

    .mobile-menu-btn {
        width: 36px;
        height: 36px;
    }

    .hamburger-line {
        width: 16px;
    }

    .auth-buttons .nav-item {
        width: 180px;
        max-width: 65vw;
        font-size: 0.9rem;
        padding: 0.6rem 1rem;
    }
}

/* Landscape mobile adjustments */
@media (max-width: 768px) and (orientation: landscape) {
    .nav-items {
        flex-direction: column;
        justify-content: center;
        align-items: center;
        height: 100vh;
        padding: 1rem;
        overflow-y: auto;
        gap: 1.5rem;
    }

    .nav-item {
        font-size: 1rem;
        padding: 0.75rem 1.25rem;
        width: 220px;
        max-width: 80vw;
    }

    .nav-dropdown {
        width: 220px;
        max-width: 80vw;
    }
}

/* Ensure mobile menu works with different screen heights */
@media (max-height: 600px) and (max-width: 768px) {
    .nav-items {
        padding: 1rem;
        gap: 1rem;
        overflow-y: auto;
        justify-content: flex-start;
        padding-top: 2rem;
    }

    .nav-item {
        font-size: 1rem;
        padding: 0.75rem 1.25rem;
        width: 200px;
        max-width: 80vw;
    }

    .nav-dropdown {
        width: 200px;
        max-width: 80vw;
    }
}

/* Enhanced Dark/Light Theme Variables */
:root {
    --bg-primary: #ffffff;
    --bg-primary-rgb: 255, 255, 255;
    --bg-secondary: #f8fafc;
    --bg-secondary-rgb: 248, 250, 252;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --primary-color: #3b82f6;
    --accent-color: #8b5cf6;
    --primary-hover: #2563eb;
    --accent-hover: #7c3aed;
}

[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-primary-rgb: 15, 23, 42;
    --bg-secondary: #1e293b;
    --bg-secondary-rgb: 30, 41, 59;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --primary-color: #3b82f6;
    --accent-color: #8b5cf6;
    --primary-hover: #2563eb;
    --accent-hover: #7c3aed;
}