/* ===== NOTIFICATION SYSTEM ===== */
.notification-system {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 10000;
    pointer-events: none;
}

.notification {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-4) var(--space-5);
    margin-bottom: var(--space-3);
    min-width: 300px;
    max-width: 400px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    transform: translateX(450px);
    transition: all var(--transition-normal);
    pointer-events: all;
    position: relative;
    overflow: hidden;
}

.notification::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--info-color);
    transition: background var(--transition-fast);
}

.notification.success::before {
    background: var(--success-color);
}

.notification.error::before {
    background: var(--error-color);
}

.notification.warning::before {
    background: var(--warning-color);
}

.notification.show {
    transform: translateX(0);
}

.notification-content {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
}

.notification-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    background: var(--info-color);
    color: white;
    flex-shrink: 0;
}

.notification.success .notification-icon {
    background: var(--success-color);
}

.notification.error .notification-icon {
    background: var(--error-color);
}

.notification.warning .notification-icon {
    background: var(--warning-color);
}

.notification-text {
    flex: 1;
}

.notification-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.notification-message {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.4;
}

.notification-close {
    position: absolute;
    top: var(--space-2);
    right: var(--space-2);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: var(--font-size-lg);
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color var(--transition-fast);
}

.notification-close:hover {
    color: var(--text-secondary);
}

/* ===== MODAL SYSTEM ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 20000;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.modal-overlay.show {
    opacity: 1;
}

.educational-modal {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    max-width: 600px;
    width: 90vw;
    max-height: 80vh;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.modal-overlay.show .educational-modal {
    transform: scale(1);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-6);
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
}

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: var(--font-size-2xl);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    color: var(--text-secondary);
    background: var(--bg-tertiary);
}

.modal-body {
    padding: var(--space-6);
    overflow-y: auto;
    max-height: 60vh;
    line-height: 1.6;
}

.modal-body h4 {
    color: var(--primary-color);
    margin-bottom: var(--space-4);
    font-size: var(--font-size-lg);
}

.modal-body p {
    margin-bottom: var(--space-4);
    color: var(--text-secondary);
}

.modal-body ul {
    margin: var(--space-4) 0;
    padding-left: var(--space-6);
}

.modal-body li {
    margin-bottom: var(--space-2);
    color: var(--text-secondary);
}

.modal-body strong {
    color: var(--text-primary);
}

.modal-body code {
    background: var(--bg-tertiary);
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-sm);
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    color: var(--primary-color);
    font-size: var(--font-size-sm);
}

.modal-footer {
    padding: var(--space-5) var(--space-6);
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    text-align: right;
}

.modal-action-btn {
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
    color: white;
    border: none;
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.modal-action-btn:hover {
    background: linear-gradient(135deg, #1d4ed8, var(--primary-color));
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ===== EDUCATIONAL CONTENT STYLING ===== */
.education-box {
    background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
    border: 1px solid #0891b2;
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    margin: var(--space-4) 0;
}

.education-box.success {
    background: linear-gradient(135deg, #f0fdf4, #dcfce7);
    border-color: var(--success-color);
}

.education-box.error {
    background: linear-gradient(135deg, #fef2f2, #fee2e2);
    border-color: var(--error-color);
}

.education-box.warning {
    background: linear-gradient(135deg, #fffbeb, #fef3c7);
    border-color: var(--warning-color);
}

.math-equation {
    background: var(--bg-primary);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    margin: var(--space-4) 0;
    text-align: center;
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: var(--font-size-lg);
    color: var(--primary-color);
    font-weight: 700;
}

.probability-change {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    margin: var(--space-4) 0;
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-weight: 700;
}

.prob-before {
    color: var(--success-color);
    font-size: var(--font-size-lg);
}

.prob-after {
    color: var(--error-color);
    font-size: var(--font-size-lg);
}

.prob-arrow {
    color: var(--text-muted);
    font-size: var(--font-size-xl);
}

/* ===== DRAG FEEDBACK STYLES ===== */
.drag-helper {
    position: fixed;
    pointer-events: none;
    z-index: 15000;
    opacity: 0;
    transform: scale(1.1);
    filter: brightness(1.2) drop-shadow(0 10px 30px rgba(0, 0, 0, 0.4));
    transition: opacity var(--transition-fast);
}

.drag-helper.active {
    opacity: 1;
}

.drag-ghost {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(37, 99, 235, 0.1);
    border: 2px dashed var(--primary-color);
    border-radius: var(--radius-md);
    animation: ghostPulse 1.5s infinite;
}

@keyframes ghostPulse {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.05); }
}

/* ===== PARTICLE EFFECTS ===== */
.particle {
    position: fixed;
    pointer-events: none;
    z-index: 12000;
    border-radius: 50%;
    animation: particleFloat 2s ease-out forwards;
}

@keyframes particleFloat {
    0% {
        transform: translate(0, 0) scale(1);
        opacity: 1;
    }
    100% {
        transform: translate(var(--particle-x, 0), var(--particle-y, -100px)) scale(0.1);
        opacity: 0;
    }
}

.particle.success {
    background: var(--success-color);
    box-shadow: 0 0 10px var(--success-color);
}

.particle.error {
    background: var(--error-color);
    box-shadow: 0 0 10px var(--error-color);
}

.particle.warning {
    background: var(--warning-color);
    box-shadow: 0 0 10px var(--warning-color);
}

/* ===== LOADING STATES ===== */
.loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ===== ACCESSIBILITY IMPROVEMENTS ===== */
.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-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ===== HIGH CONTRAST MODE ===== */
@media (prefers-contrast: high) {
    .notification {
        border-width: 3px;
    }
    
    .educational-modal {
        border-width: 3px;
    }
    
    .education-box {
        border-width: 3px;
    }
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
    .notification,
    .educational-modal,
    .drag-helper,
    .particle {
        animation: none !important;
        transition: none !important;
    }
    
    .loading-spinner {
        animation: none;
        border-top-color: var(--primary-color);
    }
}

/* ===== RESPONSIVE ADJUSTMENTS ===== */
@media (max-width: 768px) {
    .notification {
        min-width: 280px;
        max-width: 320px;
        margin-right: var(--space-4);
    }
    
    .educational-modal {
        width: 95vw;
        margin: var(--space-4);
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: var(--space-4);
    }
    
    .modal-title {
        font-size: var(--font-size-lg);
    }
}


/* ===== EDUCATIONAL NOTIFICATIONS (RIGHT SIDE) ===== */
.educational-notification {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 400px;
    max-width: 90vw;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    border: 2px solid var(--border-color);
    transform: translateX(450px);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 15000;
    backdrop-filter: blur(20px);
    border-left: 5px solid var(--info-color);
    overflow: hidden;
}

.educational-notification.success {
    border-left-color: var(--success-color);
}

.educational-notification.error {
    border-left-color: var(--error-color);
}

.educational-notification.warning {
    border-left-color: var(--warning-color);
}

.educational-notification.show {
    transform: translateX(0);
}

.educational-notification.hide {
    transform: translateX(450px);
    opacity: 0;
}

/* Educational Notification Header */
.educational-notification-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) var(--space-5);
    background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
    border-bottom: 1px solid var(--border-color);
}

.educational-title {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.educational-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: var(--font-size-xl);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.educational-close:hover {
    color: var(--text-secondary);
    background: var(--bg-tertiary);
}

/* Educational Content */
.educational-content {
    padding: var(--space-5);
    max-height: 400px;
    overflow-y: auto;
    line-height: 1.5;
}

.educational-content h4 {
    color: var(--primary-color);
    font-size: var(--font-size-base);
    margin-bottom: var(--space-3);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.educational-content p {
    margin-bottom: var(--space-3);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.educational-content ul {
    margin: var(--space-3) 0;
    padding-left: var(--space-5);
}

.educational-content li {
    margin-bottom: var(--space-2);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.educational-content strong {
    color: var(--text-primary);
}

/* Probability Change Display */
.probability-change {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    margin: var(--space-3) 0;
    padding: var(--space-3);
    background: rgba(37, 99, 235, 0.05);
    border-radius: var(--radius-md);
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-weight: 700;
}

.prob-before {
    color: var(--success-color);
    font-size: var(--font-size-lg);
}

.prob-after {
    color: var(--error-color);
    font-size: var(--font-size-lg);
}

.prob-arrow {
    color: var(--text-muted);
    font-size: var(--font-size-xl);
    font-weight: 900;
}

/* Math Equation */
.math-equation {
    background: var(--bg-primary);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--space-3);
    margin: var(--space-3) 0;
    text-align: center;
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: var(--font-size-sm);
    color: var(--primary-color);
    font-weight: 700;
}

/* Education Boxes */
.education-box {
    background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
    border: 1px solid var(--info-color);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    margin: var(--space-3) 0;
}

.education-box.success {
    background: linear-gradient(135deg, #f0fdf4, #dcfce7);
    border-color: var(--success-color);
}

.education-box.error {
    background: linear-gradient(135deg, #fef2f2, #fee2e2);
    border-color: var(--error-color);
}

.education-box.warning {
    background: linear-gradient(135deg, #fffbeb, #fef3c7);
    border-color: var(--warning-color);
}

/* Progress Bar */
.educational-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: rgba(0, 0, 0, 0.1);
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width linear;
}

.educational-notification.show .progress-bar {
    animation: progressCount 8s linear forwards;
}

@keyframes progressCount {
    0% { width: 0%; }
    100% { width: 100%; }
}

/* Responsive */
@media (max-width: 768px) {
    .educational-notification {
        width: 350px;
        right: 15px;
        top: 15px;
    }
    
    .educational-content {
        padding: var(--space-4);
        max-height: 300px;
    }
    
    .educational-title {
        font-size: var(--font-size-base);
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    .educational-notification {
        transition: none;
    }
    
    .progress-bar {
        animation: none;
        width: 100%;
    }
}