/* Modern Header Styles */
:root {
    --header-height: 60px;
    --top-bar-height: 35px;
    --header-bg: #ffffff;
    --header-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    --top-bar-bg: #1a1a1a;
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --border-color: #e5e7eb;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Header Container */
.modern-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--header-bg);
    box-shadow: var(--header-shadow);
    transition: var(--transition);
}

.modern-header.scrolled {
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.12);
}

/* Top Bar */
.top-bar {
    background: var(--top-bar-bg);
    color: #ffffff;
    font-size: 0.8rem;
    padding: 0;
    height: var(--top-bar-height);
    display: flex;
    align-items: center;
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    height: 100%;
}

.contact-info {
    display: flex;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #d1d5db;
    transition: var(--transition);
}

.contact-item:hover {
    color: #ffffff;
}

.contact-item i {
    font-size: 0.875rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: #d1d5db;
    text-decoration: none;
    transition: var(--transition);
    font-size: 0.875rem;
}

.social-link:hover {
    background: var(--primary-color);
    color: #ffffff;
    transform: translateY(-2px);
}

/* Main Navigation */
.main-nav {
    background: var(--header-bg);
    height: var(--header-height);
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    height: 100%;
}

/* Brand */
.brand {
    display: flex;
    align-items: center;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-dark);
    transition: var(--transition);
}

.brand-link:hover {
    color: var(--primary-color);
}

.brand-logo {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.brand-logo.svg-logo {
    height: 40px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
}

.brand-text {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
}

/* Navigation Menu */
.nav-menu {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.8rem;
    border-radius: 8px;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.05);
}

.nav-link i {
    font-size: 1rem;
}

.dropdown-icon {
    font-size: 0.75rem;
    transition: var(--transition);
}

.dropdown:hover .dropdown-icon {
    transform: rotate(180deg);
}

/* Dropdown Menu */
.dropdown-menu {
    border: none;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    padding: 0.5rem;
    margin-top: 0.5rem;
    min-width: 200px;
}

.dropdown-item {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dropdown-item:hover {
    background: rgba(37, 99, 235, 0.05);
    color: var(--primary-color);
}

/* User Actions */
.user-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.user-dropdown .user-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: none;
    border: none;
    color: var(--text-dark);
    font-weight: 500;
    border-radius: 8px;
    transition: var(--transition);
    cursor: pointer;
}

.user-dropdown .user-btn:hover {
    background: rgba(37, 99, 235, 0.05);
    color: var(--primary-color);
}

.user-avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--primary-color);
    color: #ffffff;
}

.user-avatar i {
    font-size: 1.25rem;
}

.user-name {
    font-weight: 500;
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Auth Buttons */
.auth-buttons {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.auth-buttons .btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-weight: 500;
    border-radius: 8px;
    transition: var(--transition);
    text-decoration: none;
    border: 1px solid transparent;
}

.auth-buttons .btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
    background: transparent;
}

.auth-buttons .btn-outline-primary:hover {
    background: var(--primary-color);
    color: #ffffff;
    transform: translateY(-1px);
}

.auth-buttons .btn-primary {
    background: var(--primary-color);
    color: #ffffff;
    border-color: var(--primary-color);
}

.auth-buttons .btn-primary:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
}

/* Mobile Toggle */
.mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    gap: 4px;
    z-index: 1001;
    position: relative;
}

.hamburger-line {
    width: 24px;
    height: 2px;
    background: var(--text-dark);
    transition: var(--transition);
    border-radius: 2px;
}

.mobile-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

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

/* Mobile Overlay */
.mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Header Spacer */
.header-spacer {
    height:40px;
}

/* Responsive Design */
@media (max-width: 991.98px) {
    .top-bar {
        display: none;
    }
    
    .header-spacer {
        height: 30px;
    }
    
    .contact-info {
        gap: 1rem;
    }
    
    .contact-item span {
        display: none;
    }
    
    .social-links {
        gap: 0.5rem;
    }
}

/* Responsive Font Sizes */
@media (max-width: 1199.98px) {
    .nav-link {
        font-size: 0.75rem;
    }
}

@media (max-width: 991.98px) {
    .nav-link {
        font-size: 0.7rem;
    }
}

@media (max-width: 767.98px) {
    .modern-header .mobile-toggle,
    .mobile-toggle {
        display: flex !important;
        z-index: 1001 !important;
        position: relative !important;
        visibility: visible !important;
        opacity: 1 !important;
    }
    
    .nav-link {
        font-size: 0.875rem;
    }
    
    .nav-menu {
        position: fixed;
        top: 60px; /* Fixed height since top-bar is hidden on mobile */
        left: 0;
        right: 0;
        background: var(--header-bg);
        box-shadow: var(--header-shadow);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        z-index: 1000;
        max-height: calc(100vh - 60px);
        overflow-y: auto;
        width: 100%;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-list {
        flex-direction: column;
        gap: 0;
        padding: 1rem;
        width: 100%;
    }
    
    .nav-item {
        width: 100%;
    }
    
    .nav-link {
        width: 100%;
        justify-content: flex-start;
        padding: 1rem;
        border-radius: 8px;
    }
    
    .dropdown-menu {
        position: static;
        box-shadow: none;
        background: rgba(37, 99, 235, 0.02);
        margin: 0.5rem 0 0 0;
        border-radius: 8px;
    }
    
    .user-actions {
        position: fixed;
        bottom: 1rem;
        left: 1rem;
        right: 1rem;
        background: var(--header-bg);
        padding: 1rem;
        border-radius: 12px;
        box-shadow: var(--header-shadow);
        justify-content: center;
        transform: translateY(100px);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-menu.active ~ .user-actions {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .auth-buttons {
        width: 100%;
        justify-content: center;
    }
    
    .auth-buttons .btn {
        flex: 1;
        justify-content: center;
    }
    
    .user-dropdown {
        width: 100%;
    }
    
    .user-dropdown .user-btn {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 575.98px) {
    .brand-text {
        display: none;
    }
    
    .contact-info {
        display: none;
    }
    
    .social-links {
        justify-content: center;
        width: 100%;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.3s ease-out;
}

.slide-down {
    animation: slideDown 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Loading State */
.header-loading {
    pointer-events: none;
}

.header-loading .nav-link,
.header-loading .btn {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus States */
.nav-link:focus,
.btn:focus,
.user-btn:focus,
.mobile-toggle:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .modern-header {
        border-bottom: 2px solid var(--text-dark);
    }
    
    .nav-link,
    .btn {
        border: 1px solid var(--text-dark);
    }
}