/* Modern Animations & Transitions */

/* Smooth fade-in animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.event-marker {
    animation: fadeIn 0.5s cubic-bezier(0.4, 0, 0.2, 1) backwards;
}

.event-marker:nth-child(1) { animation-delay: 0.05s; }
.event-marker:nth-child(2) { animation-delay: 0.1s; }
.event-marker:nth-child(3) { animation-delay: 0.15s; }
.event-marker:nth-child(4) { animation-delay: 0.2s; }
.event-marker:nth-child(5) { animation-delay: 0.25s; }
.event-marker:nth-child(n+6) { animation-delay: 0.3s; }

/* Smooth zoom transitions */
.timeline-track {
    transition: width var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* Toast notifications - Modern Design */
.toast {
    position: fixed;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    color: var(--text-primary);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    z-index: 10000;
    opacity: 0;
    transition: all var(--transition-base);
    pointer-events: none;
    backdrop-filter: blur(10px);
    font-weight: 500;
    font-size: 0.875rem;
    max-width: 90%;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.toast.success {
    border-color: var(--success);
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.toast.error {
    border-color: var(--error);
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
}

.toast.info {
    border-color: var(--info);
    background: rgba(59, 130, 246, 0.1);
    color: var(--info);
}

/* Loading skeleton - Modern Design */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--bg-elevated) 25%,
        var(--bg-tertiary) 50%,
        var(--bg-elevated) 75%
    );
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Micro-interactions */
.btn-control:active,
.btn-primary:active,
.btn-secondary:active {
    transform: translateY(0) scale(0.98);
}

/* Success animation */
@keyframes successPulse {
    0%, 100% { 
        transform: scale(1);
    }
    50% { 
        transform: scale(1.05);
    }
}

.success-animation {
    animation: successPulse 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Progress indicator */
.progress-bar {
    height: 4px;
    background: var(--bg-elevated);
    border-radius: 2px;
    overflow: hidden;
    margin: 0.75rem 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
    transition: width var(--transition-base);
    animation: progressPulse 1.5s ease-in-out infinite;
}

@keyframes progressPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}

/* Keyboard shortcuts help - Modern Design */
.shortcuts-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(8px);
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
    animation: fadeIn var(--transition-base);
}

.shortcuts-overlay.show {
    display: flex;
}

.shortcuts-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    padding: 2rem;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    animation: fadeInScale var(--transition-base);
}

.shortcuts-content h2 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    text-transform: none;
    letter-spacing: -0.02em;
}

.shortcut-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.875rem 0;
    border-bottom: 1px solid var(--border-subtle);
}

.shortcut-item:last-child {
    border-bottom: none;
}

.shortcut-item span:first-child {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.shortcut-key {
    background: var(--bg-elevated);
    color: var(--text-primary);
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-family: 'Inter', monospace;
    font-size: 0.8125rem;
    border: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-sm);
}

/* Smooth modal transitions */
.modal {
    animation: fadeIn var(--transition-base);
}

.modal-content {
    animation: slideUp var(--transition-base) cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Active filter indicators */
.filter-controls select.active,
.filter-controls input.active {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    background: var(--bg-secondary);
}

/* Breadcrumb - Modern Design */
.breadcrumb {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    padding: 0.75rem 0;
    color: var(--text-tertiary);
    font-size: 0.875rem;
    font-weight: 500;
}

.breadcrumb-item {
    color: var(--primary);
    cursor: pointer;
    transition: color var(--transition-fast);
    font-weight: 500;
}

.breadcrumb-item:hover {
    color: var(--primary-hover);
}

.breadcrumb-separator {
    color: var(--text-tertiary);
    opacity: 0.5;
}

/* Hover lift effect */
.hover-lift {
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Focus ring animation */
@keyframes focusRing {
    0% {
        box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.4);
    }
    100% {
        box-shadow: 0 0 0 4px rgba(99, 102, 241, 0);
    }
}

.focus-ring:focus {
    animation: focusRing 0.3s ease-out;
}

/* Smooth color transitions */
.color-transition {
    transition: color var(--transition-base), background-color var(--transition-base), border-color var(--transition-base);
}

/* Stagger animation for lists */
.stagger-item {
    animation: fadeIn 0.5s cubic-bezier(0.4, 0, 0.2, 1) backwards;
}

.stagger-item:nth-child(1) { animation-delay: 0.05s; }
.stagger-item:nth-child(2) { animation-delay: 0.1s; }
.stagger-item:nth-child(3) { animation-delay: 0.15s; }
.stagger-item:nth-child(4) { animation-delay: 0.2s; }
.stagger-item:nth-child(5) { animation-delay: 0.25s; }
.stagger-item:nth-child(n+6) { animation-delay: 0.3s; }

/* Shimmer effect for loading states */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.shimmer {
    animation: shimmer 2s infinite linear;
    background: linear-gradient(
        to right,
        var(--bg-elevated) 0%,
        var(--bg-tertiary) 50%,
        var(--bg-elevated) 100%
    );
    background-size: 1000px 100%;
}

/* Smooth scale on interaction */
.interactive-scale {
    transition: transform var(--transition-fast);
}

.interactive-scale:active {
    transform: scale(0.98);
}

/* Gradient text animation */
@keyframes gradientShift {
    0%, 100% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, var(--accent) 100%);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 3s ease infinite;
}

/* Smooth opacity transitions */
.fade-in {
    animation: fadeIn var(--transition-base);
}

.fade-out {
    animation: fadeOut var(--transition-base);
}

@keyframes fadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

/* Smooth height transitions */
.height-transition {
    transition: height var(--transition-base), opacity var(--transition-base);
    overflow: hidden;
}