/**
 * ============================================================================
 * NAVBAR COMPONENT STYLES
 * ============================================================================
 * 
 * Styles for the top navigation bar, including theme toggle,
 * user authentication, and branding elements.
 */

/* === NAVBAR BASE === */
.navbar {
    background: var(--navbar-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    height: var(--navbar-height);
    z-index: var(--z-navbar);
    border-bottom: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

/* === NAVBAR BRAND === */
.navbar-brand {
    color: var(--text-white);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-xl);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.navbar-brand:hover {
    color: var(--text-white);
    text-decoration: none;
    opacity: 0.9;
}

.navbar-brand:focus {
    color: var(--text-white);
    outline: 2px solid rgba(255, 255, 255, 0.5);
    outline-offset: 2px;
}

.site-title {
    display: inline-block;
    margin-left: var(--spacing-sm);
}

/* === THEME TOGGLE === */
#theme-toggle-btn {
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: all var(--transition-normal);
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-white);
}

#theme-toggle-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-1px);
}

#theme-toggle-btn:focus {
    box-shadow: 0 0 0 0.2rem rgba(255, 255, 255, 0.3);
    outline: none;
}

#theme-icon {
    font-size: var(--font-size-sm);
    transition: transform var(--transition-fast);
}

#theme-toggle-btn:hover #theme-icon {
    transform: rotate(15deg);
}

/* === CREDITS DISPLAY === */
.credits-display {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-xl);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-md);
    margin-right: var(--spacing-md);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all var(--transition-normal);
}

.credits-display:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.credits-display i {
    font-size: var(--font-size-base);
    opacity: 0.9;
}

.credits-count {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    margin-left: var(--spacing-xs);
}

/* === SUBSCRIPTION BADGE === */
.subscription-badge {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-xl);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border: 2px solid;
    transition: all var(--transition-normal);
}

/* Subscription badge variants */
.subscription-badge {
    background: rgba(255, 243, 205, 0.9);
    border-color: var(--warning-color);
    color: #856404;
}

.subscription-badge.premium {
    background: rgba(40, 167, 69, 0.1);
    border-color: var(--success-color);
    color: #155724;
}

.subscription-badge.ultra {
    background: rgba(111, 66, 193, 0.1);
    border-color: #6f42c1;
    color: #4a148c;
}

/* === USER AVATAR === */
.user-avatar-badge {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-white);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-base);
    text-transform: uppercase;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow-md);
}

.user-avatar-badge:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
    border-color: rgba(255, 255, 255, 0.4);
}

.user-avatar-badge:focus {
    outline: 2px solid rgba(255, 255, 255, 0.5);
    outline-offset: 2px;
}

/* === DROPDOWN MENU === */
.dropdown-menu {
    border: none;
    box-shadow: var(--shadow-xl);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm) 0;
    min-width: 250px;
    margin-top: var(--spacing-sm);
    background: var(--bg-primary);
    overflow: hidden;
}

.dropdown-menu-end {
    right: 0;
    left: auto;
}

.dropdown-header {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: var(--font-weight-semibold);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-xs);
}

.dropdown-item {
    padding: var(--spacing-md) var(--spacing-lg);
    transition: all var(--transition-fast);
    border-radius: 0;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.dropdown-item:hover {
    background-color: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
}

.dropdown-item:focus {
    background-color: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
    outline: none;
}

.dropdown-item.text-danger:hover {
    background-color: rgba(220, 53, 69, 0.1);
    color: var(--danger-color);
}

.dropdown-item i {
    width: 16px;
    text-align: center;
    opacity: 0.7;
}

.dropdown-divider {
    margin: var(--spacing-xs) 0;
    border-color: var(--border-color);
}

/* === SIGN IN BUTTON === */
.sign-in-btn {
    background: var(--text-white);
    color: var(--primary-color);
    border: 2px solid var(--text-white);
    font-weight: var(--font-weight-semibold);
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-xl);
    transition: all var(--transition-normal);
}

.sign-in-btn:hover {
    background: rgba(255, 255, 255, 0.95);
    color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.sign-in-btn:focus {
    outline: 2px solid rgba(255, 255, 255, 0.5);
    outline-offset: 2px;
}

/* === RESPONSIVE DESIGN === */
@media (max-width: 768px) {
    .navbar-brand .site-title {
        display: none;
    }
    
    .credits-display {
        font-size: var(--font-size-xs);
        padding: var(--spacing-xs) var(--spacing-sm);
    }
    
    .credits-count {
        font-size: var(--font-size-sm);
    }
    
    .subscription-badge {
        display: none;
    }
    
    .sign-in-btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: var(--font-size-sm);
    }
}

@media (max-width: 576px) {
    .navbar {
        padding: 0 var(--spacing-md);
    }
    
    #theme-toggle-btn {
        display: none;
    }
    
    .dropdown-menu {
        min-width: 200px;
        right: var(--spacing-sm);
    }
}

/* === DARK THEME ADJUSTMENTS === */
[data-theme="dark"] .dropdown-menu {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
}

[data-theme="dark"] .dropdown-header {
    color: var(--text-muted);
    border-color: var(--border-color);
}

[data-theme="dark"] .dropdown-item {
    color: var(--text-primary);
}

[data-theme="dark"] .dropdown-item:hover {
    background-color: rgba(159, 122, 234, 0.1);
    color: var(--primary-color);
}

/* === ANIMATION KEYFRAMES === */
@keyframes dropdownShow {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dropdown-menu.show {
    display: block;
    opacity: 1;
    transform: translateY(0);
    animation: dropdownShow 0.15s ease-out;
}

/* === ACCESSIBILITY IMPROVEMENTS === */
@media (prefers-reduced-motion: reduce) {
    .navbar,
    .navbar-brand,
    .credits-display,
    .user-avatar-badge,
    .dropdown-item {
        transition: none;
    }
    
    .dropdown-menu.show {
        animation: none;
    }
}

/* === HIGH CONTRAST MODE === */
@media (prefers-contrast: high) {
    .navbar {
        border-bottom: 2px solid;
    }
    
    .dropdown-menu {
        border: 2px solid;
    }
    
    .dropdown-item:hover,
    .dropdown-item:focus {
        outline: 2px solid;
    }
}