/* =====================================================
   HEADER COMPONENT STYLES
   Reusable header for all pages
===================================================== */

/* =====================================================
   HEADER
===================================================== */

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-header);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    transition: all var(--transition-normal);
}

.header.scrolled {
    background: rgba(5, 8, 22, 0.95);
    box-shadow: var(--shadow-md);
}

/* =====================================================
   NAVIGATION
===================================================== */

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) 0;
    min-height: 70px;
}

/* =====================================================
   LOGO
===================================================== */

.nav-logo {
    flex-shrink: 0;
}

.logo-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.logo-link:hover {
    opacity: 0.8;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 0 10px rgba(0, 229, 255, 0.3));
}

.logo-text {
    font-family: var(--font-display);
    font-size: var(--fs-md);
    font-weight: 700;
    color: var(--text-heading);
    letter-spacing: 0.5px;
    text-rendering: optimizeLegibility;
    font-feature-settings: "kern" 1, "liga" 1;
}

/* =====================================================
   NAVIGATION MENU
===================================================== */

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--text-body);
    font-weight: 500;
    font-size: var(--fs-sm);
    text-decoration: none;
    padding: var(--space-2) var(--space-2);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    position: relative;
    white-space: nowrap;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: all var(--transition-fast);
    transform: translateX(-50%);
}

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

.nav-link:hover::after {
    width: 80%;
}

.nav-link.active {
    color: var(--text-brand);
}

.nav-link.active::after {
    width: 80%;
}

/* =====================================================
   NAV ACTIONS
===================================================== */

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-shrink: 0;
}

/* =====================================================
   USER MENU
===================================================== */

.user-menu {
    position: relative;
}

.user-avatar-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-avatar {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid var(--border-brand);
    transition: all var(--transition-fast);
    box-shadow: var(--shadow-neon);
}

.user-avatar:hover {
    transform: scale(1.05);
    box-shadow: var(--glow-cyan);
}

.avatar-text {
    color: var(--brand-dark);
    font-weight: 700;
    font-size: var(--fs-sm);
}

.user-dropdown {
    position: absolute;
    top: calc(100% + var(--space-3));
    right: 0;
    width: 280px;
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 1001;
}

.user-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-header {
    padding: var(--space-4);
    border-bottom: 1px solid var(--border-light);
    background: var(--bg-surface);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.user-name {
    display: block;
    color: var(--text-heading);
    font-weight: 600;
    font-size: var(--fs-sm);
    margin-bottom: var(--space-1);
}

.user-email {
    display: block;
    color: var(--text-muted);
    font-size: var(--fs-xs);
}

.dropdown-menu {
    list-style: none;
    padding: var(--space-2);
    margin: 0;
}

.dropdown-item {
    display: block;
    padding: var(--space-3) var(--space-4);
    color: var(--text-body);
    text-decoration: none;
    font-size: var(--fs-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

.dropdown-item-danger {
    color: var(--error);
}

.dropdown-item-danger:hover {
    background: rgba(255, 69, 96, 0.1);
    color: var(--error);
}

.dropdown-divider {
    height: 1px;
    background: var(--border-light);
    margin: var(--space-2) 0;
}

/* =====================================================
   MOBILE MENU BUTTON
===================================================== */

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
    width: 32px;
    height: 32px;
    align-items: center;
    justify-content: center;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-heading);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-10px);
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* =====================================================
   MOBILE MENU
===================================================== */

.mobile-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-light);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: 999;
    max-height: calc(100vh - 70px);
    overflow-y: auto;
}

.mobile-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.mobile-menu-list {
    list-style: none;
    padding: var(--space-4);
    margin: 0;
}

.mobile-menu-link {
    display: block;
    padding: var(--space-4);
    color: var(--text-body);
    text-decoration: none;
    font-size: var(--fs-md);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    border-bottom: 1px solid var(--border-light);
}

.mobile-menu-link:hover {
    background: var(--bg-surface);
    color: var(--text-brand);
}

.mobile-menu-link:last-child {
    border-bottom: none;
}

.mobile-menu-actions {
    padding: var(--space-4);
    border-top: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* =====================================================
   MAIN CONTENT
===================================================== */

.main-content {
    padding-top: 70px;
    min-height: 100vh;
}

/* =====================================================
   RESPONSIVE DESIGN
===================================================== */

@media (max-width: 1400px) {
    .nav-menu {
        gap: var(--space-2);
    }

    .nav-link {
        font-size: var(--fs-xs);
        padding: var(--space-2) var(--space-2);
    }
}

@media (max-width: 1200px) {
    .nav-menu {
        gap: var(--space-2);
    }

    .nav-link {
        font-size: var(--fs-xs);
        padding: var(--space-1) var(--space-2);
    }
}

@media (max-width: 992px) {
    .nav-menu {
        gap: var(--space-2);
    }

    .nav-link {
        font-size: 13px;
        padding: var(--space-1) var(--space-2);
    }

    .logo-text {
        font-size: var(--fs-sm);
    }

    .logo-icon {
        width: 36px;
        height: 36px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

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

    .nav-actions {
        display: flex;
        gap: var(--space-2);
    }

    .nav-actions .btn {
        padding: var(--space-2) var(--space-3);
        font-size: var(--fs-xs);
    }

    .logo-text {
        font-size: var(--fs-sm);
    }

    .user-dropdown {
        width: 260px;
    }
}

@media (max-width: 480px) {
    .nav {
        padding: var(--space-3) 0;
    }

    .logo-icon {
        width: 32px;
        height: 32px;
    }

    .logo-text {
        font-size: var(--fs-xs);
    }

    .mobile-menu-link {
        padding: var(--space-3);
        font-size: var(--fs-sm);
    }
}

/* =====================================================
   ACCESSIBILITY
===================================================== */

.mobile-menu-btn:focus,
.user-avatar-btn:focus {
    outline: 2px solid var(--border-brand);
    outline-offset: 2px;
}

.nav-link:focus {
    outline: 2px solid var(--border-brand);
    outline-offset: 2px;
}

/* =====================================================
   ANIMATIONS
===================================================== */

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

.user-dropdown.active {
    animation: fadeIn 0.2s ease;
}

/* =====================================================
   SCROLL BEHAVIOR
===================================================== */

.header {
    transition: background var(--transition-normal), 
                box-shadow var(--transition-normal),
                border-color var(--transition-normal);
}