/**
 * Modern Header Design
 * Sleek, contemporary navigation with glassmorphism and animations
 */

/* Override existing header styles */
.header {
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.98) 0%, rgba(30, 41, 59, 0.95) 50%, rgba(51, 65, 85, 0.92) 100%) !important;
    backdrop-filter: blur(20px) saturate(180%) !important;
    border-bottom: 1px solid rgba(99, 102, 241, 0.15) !important;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1),
                0 1px 0 rgba(99, 102, 241, 0.2) inset !important;
    position: sticky;
    top: 0;
    z-index: 1000;
    overflow: hidden !important;
}

/* Static gradient border - no animation to prevent horizontal scroll */
.header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, 
        transparent,
        rgba(99, 102, 241, 0.3) 20%,
        rgba(139, 92, 246, 0.3) 50%,
        rgba(99, 102, 241, 0.3) 80%,
        transparent
    );
    opacity: 0.8;
}

/* Modern Navigation Links */
.nav-link {
    position: relative !important;
    padding: 0.375rem 1rem !important;
    border-radius: 50px !important;
    background: rgba(255, 255, 255, 0.03) !important;
    backdrop-filter: blur(10px) !important;
    border: 1px solid rgba(255, 255, 255, 0.08) !important;
    color: rgba(255, 255, 255, 0.9) !important;
    font-weight: 500 !important;
    font-size: 0.8rem !important;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
    overflow: hidden !important;
    text-decoration: none !important;
}

/* Icon styling */
.nav-link span:first-child {
    display: inline-block;
    margin-right: 0.4rem;
    font-size: 1em;
    vertical-align: middle;
    filter: brightness(1.2);
}

/* Hover effect */
.nav-link::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.4), transparent 70%);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
    pointer-events: none;
}

.nav-link:hover {
    color: white !important;
    background: rgba(99, 102, 241, 0.15) !important;
    border-color: rgba(99, 102, 241, 0.3) !important;
    transform: translateY(-2px) scale(1.02) !important;
    box-shadow: 0 5px 20px rgba(99, 102, 241, 0.3) !important;
}

.nav-link:hover::before {
    width: 150px;
    height: 150px;
}

/* Active state */
.nav-link.active {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(139, 92, 246, 0.2)) !important;
    border-color: rgba(99, 102, 241, 0.4) !important;
    color: white !important;
    box-shadow: 0 0 30px rgba(99, 102, 241, 0.15) inset,
                0 4px 15px rgba(99, 102, 241, 0.2) !important;
}

/* Special buttons */
.nav-link.dashboard-link {
    background: linear-gradient(135deg, #f97316, #ea580c) !important;
    border: 1px solid transparent !important;
    color: white !important;
    font-weight: 600 !important;
    box-shadow: 0 4px 15px rgba(249, 115, 22, 0.3) !important;
}

.nav-link.dashboard-link:hover {
    background: linear-gradient(135deg, #fb923c, #f97316) !important;
    transform: translateY(-3px) scale(1.05) !important;
    box-shadow: 0 8px 25px rgba(249, 115, 22, 0.4) !important;
}

.nav-link.register-link {
    background: linear-gradient(135deg, #10b981, #059669) !important;
    border: 1px solid transparent !important;
    color: white !important;
    font-weight: 600 !important;
    box-shadow: 0 4px 15px rgba(16, 185, 129, 0.3) !important;
}

.nav-link.register-link:hover {
    background: linear-gradient(135deg, #34d399, #10b981) !important;
    transform: translateY(-3px) scale(1.05) !important;
    box-shadow: 0 8px 25px rgba(16, 185, 129, 0.4) !important;
}

.nav-link.login-link {
    background: rgba(99, 102, 241, 0.1) !important;
    border-color: rgba(99, 102, 241, 0.3) !important;
}

/* Modern Logo */
.logo {
    position: relative !important;
    padding: 0.5rem 1rem !important;
    border-radius: 12px !important;
}

.logo img {
    filter: drop-shadow(0 2px 8px rgba(99, 102, 241, 0.3)) !important;
    transition: all 0.3s !important;
}

.logo:hover img {
    filter: drop-shadow(0 2px 8px rgba(99, 102, 241, 0.3)) !important;
}

/* Notification Icons */
.notification-icon {
    width: 36px !important;
    height: 36px !important;
    border-radius: 50% !important;
    background: rgba(255, 255, 255, 0.05) !important;
    backdrop-filter: blur(10px) !important;
    border: 1px solid rgba(255, 255, 255, 0.1) !important;
    transition: all 0.3s !important;
    position: relative !important;
    overflow: hidden !important;
}

.notification-icon::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, rgba(99, 102, 241, 0.3), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.notification-icon:hover {
    background: rgba(99, 102, 241, 0.15) !important;
    border-color: rgba(99, 102, 241, 0.3) !important;
    transform: translateY(-2px) scale(1.1) !important;
    box-shadow: 0 5px 20px rgba(99, 102, 241, 0.3) !important;
}

.notification-icon:hover::before {
    opacity: 1;
}

.notification-icon svg {
    width: 18px !important;
    height: 18px !important;
    stroke-width: 2.5 !important;
}

/* Notification Badge */
.notification-badge {
    position: absolute !important;
    top: -3px !important;
    right: -3px !important;
    min-width: 18px !important;
    height: 18px !important;
    padding: 0 5px !important;
    background: linear-gradient(135deg, #ef4444, #dc2626) !important;
    border: 2px solid rgba(15, 23, 42, 0.98) !important;
    border-radius: 20px !important;
    font-size: 0.65rem !important;
    font-weight: 700 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    animation: pulse 2s infinite !important;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    cursor: pointer;
    transition: all 0.3s;
}

.mobile-menu-btn span {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: white;
    border-radius: 2px;
    transition: all 0.3s;
}

.mobile-menu-btn span:nth-child(1) { top: 10px; }
.mobile-menu-btn span:nth-child(2) { top: 17px; }
.mobile-menu-btn span:nth-child(3) { top: 24px; }

.mobile-menu-btn.active span:nth-child(1) {
    top: 17px;
    transform: translateX(-50%) rotate(45deg);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    top: 17px;
    transform: translateX(-50%) rotate(-45deg);
}

/* Responsive */
@media (max-width: 1024px) {
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: linear-gradient(135deg, rgba(15, 23, 42, 0.98), rgba(30, 41, 59, 0.95));
        backdrop-filter: blur(20px);
        padding: 1rem;
        flex-direction: column;
        gap: 0.5rem;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: all 0.3s;
        border-radius: 0 0 1rem 1rem;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    }
    
    .nav-links.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .notification-icons {
        position: absolute;
        right: 60px;
        gap: 0.5rem;
    }
}

/* Light mode adjustments */
[data-theme="light"] .header {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(249, 250, 251, 0.95) 50%, rgba(243, 244, 246, 0.92) 100%) !important;
    border-bottom-color: rgba(99, 102, 241, 0.1) !important;
}

[data-theme="light"] .nav-link {
    background: rgba(0, 0, 0, 0.02) !important;
    border-color: rgba(0, 0, 0, 0.06) !important;
    color: rgba(30, 41, 59, 0.9) !important;
}

[data-theme="light"] .nav-link:hover {
    background: rgba(99, 102, 241, 0.08) !important;
    border-color: rgba(99, 102, 241, 0.2) !important;
    color: #1e293b !important;
}

[data-theme="light"] .notification-icon {
    background: rgba(0, 0, 0, 0.02) !important;
    border-color: rgba(0, 0, 0, 0.06) !important;
    color: rgba(30, 41, 59, 0.8) !important;
}

/* Add smooth scroll behavior */
html {
    scroll-behavior: smooth;
}

/* Header scroll effect */
.header.scrolled {
    box-shadow: 0 8px 40px rgba(99, 102, 241, 0.15),
                0 1px 0 rgba(99, 102, 241, 0.3) inset !important;
}