/* GitCover Canvas Navigation Styles */

/* Canvas Navigation Container */
.canvas-navigation {
    background: var(--background-light);
    border-bottom: 2px solid var(--primary-color);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 90;
    box-shadow: var(--shadow-sm);
}

.canvas-nav-container {
    max-width: var(--desktop-large);
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

/* Canvas Info */
.canvas-nav-info {
    flex: 1;
    min-width: 0;
}

.canvas-current {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.canvas-title {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    margin: 0;
    color: var(--text-primary);
    line-height: 1.2;
}

/* Navigation Controls */
.canvas-nav-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.canvas-nav-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    min-height: 44px;
    text-decoration: none;
}

.canvas-nav-btn:hover,
.canvas-nav-btn:focus {
    background: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.canvas-nav-btn:active {
    transform: translateY(0);
}

.nav-icon {
    font-size: 1.2rem;
    line-height: 1;
}

.nav-text {
    font-size: 0.9rem;
}

/* Progress Bar */
.canvas-progress {
    position: relative;
    width: 120px;
    height: 8px;
    background: var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: var(--radius-sm);
    transition: width 0.3s ease;
}

.progress-text {
    position: absolute;
    top: -24px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
}

/* Canvas Overview Dropdown */
.canvas-overview {
    position: relative;
    margin-top: var(--spacing-md);
}

.canvas-overview-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--background-section);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 500;
    color: var(--text-primary);
    transition: all 0.3s ease;
    min-height: 44px;
}

.canvas-overview-toggle:hover,
.canvas-overview-toggle:focus {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.dropdown-icon {
    transition: transform 0.3s ease;
}

.canvas-overview.active .dropdown-icon {
    transform: rotate(180deg);
}

.canvas-list {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--background-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    max-height: 400px;
    overflow-y: auto;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    list-style: none;
    padding: var(--spacing-xs) 0;
    margin: var(--spacing-xs) 0 0 0;
}

.canvas-overview.active .canvas-list {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.canvas-list-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.canvas-list-item:hover,
.canvas-list-item:focus {
    background: var(--background-section);
    border-left-color: var(--primary-color);
}

.canvas-list-item.current {
    background: rgba(78, 205, 196, 0.1);
    border-left-color: var(--primary-color);
    font-weight: 600;
}

.canvas-number {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    min-width: 70px;
}

.canvas-title-short {
    flex: 1;
    font-size: 0.9rem;
    line-height: 1.3;
}

/* Responsive Design */
@media (max-width: 767px) {
    .canvas-nav-container {
        flex-direction: column;
        gap: var(--spacing-sm);
        align-items: stretch;
    }
    
    .canvas-nav-info {
        text-align: center;
    }
    
    .canvas-nav-controls {
        justify-content: space-between;
        gap: var(--spacing-sm);
    }
    
    .canvas-nav-btn {
        flex: 1;
        justify-content: center;
        padding: var(--spacing-sm);
    }
    
    .nav-text {
        display: none;
    }
    
    .nav-icon {
        font-size: 1.5rem;
    }
    
    .canvas-progress {
        width: 80px;
    }
    
    .canvas-title {
        font-size: 1.25rem;
    }
    
    .canvas-list {
        left: var(--spacing-sm);
        right: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .canvas-navigation {
        padding: var(--spacing-sm) 0;
    }
    
    .canvas-nav-container {
        padding: 0 var(--spacing-xs);
    }
    
    .canvas-nav-controls {
        gap: var(--spacing-xs);
    }
    
    .canvas-nav-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        min-width: 44px;
    }
    
    .canvas-progress {
        width: 60px;
    }
    
    .progress-text {
        font-size: 0.7rem;
    }
}

/* Tablet Landscape */
@media (min-width: 768px) and (max-width: 1023px) {
    .canvas-nav-container {
        padding: 0 var(--spacing-md);
    }
    
    .canvas-title {
        font-size: 1.5rem;
    }
}

/* Desktop */
@media (min-width: 1024px) {
    .canvas-navigation {
        padding: var(--spacing-lg) 0;
    }
    
    .canvas-nav-container {
        padding: 0 var(--spacing-lg);
    }
    
    .canvas-progress {
        width: 150px;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .canvas-navigation {
        border-bottom: 3px solid var(--primary-color);
    }
    
    .canvas-nav-btn {
        border: 2px solid currentColor;
    }
    
    .canvas-list-item {
        border: 1px solid transparent;
    }
    
    .canvas-list-item:hover,
    .canvas-list-item:focus {
        border-color: var(--primary-color);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .canvas-nav-btn,
    .progress-bar,
    .canvas-list,
    .dropdown-icon {
        transition: none;
    }
    
    .canvas-nav-btn:hover {
        transform: none;
    }
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    .canvas-navigation {
        background: var(--background-light);
        border-bottom-color: var(--primary-color);
    }
    
    .canvas-list {
        background: var(--background-section);
        border-color: var(--border-color);
    }
    
    .canvas-overview-toggle {
        background: var(--background-light);
        border-color: var(--border-color);
        color: var(--text-primary);
    }
}

/* Print Styles */
@media print {
    .canvas-navigation {
        position: static;
        box-shadow: none;
        border-bottom: 1px solid #ccc;
        padding: 1rem 0;
    }
    
    .canvas-nav-controls,
    .canvas-overview {
        display: none;
    }
    
    .canvas-nav-info {
        text-align: center;
    }
    
    .canvas-current {
        color: #666;
    }
    
    .canvas-title {
        color: #000;
    }
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Focus Styles für bessere Accessibility */
.canvas-nav-btn:focus,
.canvas-overview-toggle:focus,
.canvas-list-item:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Touch Optimierungen */
@media (pointer: coarse) {
    .canvas-nav-btn,
    .canvas-overview-toggle,
    .canvas-list-item {
        min-height: 44px;
        min-width: 44px;
    }
    
    .canvas-list-item {
        padding: var(--spacing-md);
    }
}