/* ============================================
   TOAST NOTIFICATION SYSTEM
   ============================================
   Modern, non-intrusive toast notifications
   to replace alert() dialogs
   ============================================ */

/* Toast Container */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 400px;
    width: 100%;
    pointer-events: none;
}

/* Mobile positioning */
@media (max-width: 768px) {
    .toast-container {
        top: 10px;
        right: 10px;
        left: 10px;
        max-width: 100%;
    }
}

/* Toast Base Styles */
.toast {
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    padding: 16px 20px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
    min-width: 300px;
    max-width: 100%;
    pointer-events: auto;
    position: relative;
    overflow: hidden;
    border-left: 4px solid;
    animation: slideInRight 0.3s ease-out;
    transition: all 0.3s ease;
}

.toast:hover {
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    transform: translateX(-4px);
}

/* Toast Types */
.toast-success {
    border-left-color: #48bb78;
    background: linear-gradient(135deg, #f0fff4 0%, #ffffff 100%);
}

.toast-error {
    border-left-color: #f56565;
    background: linear-gradient(135deg, #fff5f5 0%, #ffffff 100%);
}

.toast-warning {
    border-left-color: #ed8936;
    background: linear-gradient(135deg, #fffaf0 0%, #ffffff 100%);
}

.toast-info {
    border-left-color: #4299e1;
    background: linear-gradient(135deg, #ebf8ff 0%, #ffffff 100%);
}

/* Toast Icon */
.toast-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 14px;
    font-weight: 600;
}

.toast-success .toast-icon {
    background: #48bb78;
    color: white;
}

.toast-error .toast-icon {
    background: #f56565;
    color: white;
}

.toast-warning .toast-icon {
    background: #ed8936;
    color: white;
}

.toast-info .toast-icon {
    background: #4299e1;
    color: white;
}

/* Toast Content */
.toast-content {
    flex: 1;
    min-width: 0;
}

.toast-title {
    font-weight: 600;
    font-size: 0.95rem;
    color: #212529;
    margin-bottom: 4px;
    line-height: 1.4;
}

.toast-message {
    font-size: 0.875rem;
    color: #6c757d;
    line-height: 1.5;
    word-wrap: break-word;
}

/* Toast Close Button */
.toast-close {
    flex-shrink: 0;
    background: transparent;
    border: none;
    color: #9ca3af;
    cursor: pointer;
    padding: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s ease;
    width: 24px;
    height: 24px;
    font-size: 18px;
    line-height: 1;
}

.toast-close:hover {
    background: rgba(0, 0, 0, 0.05);
    color: #374151;
}

/* Progress Bar */
.toast-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: rgba(0, 0, 0, 0.1);
    width: 100%;
    overflow: hidden;
}

.toast-progress-bar {
    height: 100%;
    background: currentColor;
    width: 100%;
    animation: progressBar linear forwards;
}

.toast-success .toast-progress-bar {
    background: #48bb78;
}

.toast-error .toast-progress-bar {
    background: #f56565;
}

.toast-warning .toast-progress-bar {
    background: #ed8936;
}

.toast-info .toast-progress-bar {
    background: #4299e1;
}

/* Animations */
@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes slideOutRight {
    from {
        transform: translateX(0);
        opacity: 1;
    }
    to {
        transform: translateX(100%);
        opacity: 0;
    }
}

@keyframes progressBar {
    from {
        width: 100%;
    }
    to {
        width: 0%;
    }
}

.toast.hiding {
    animation: slideOutRight 0.3s ease-out forwards;
}

/* Loading Spinner Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: fadeIn 0.2s ease-out;
}

.loading-spinner {
    background: white;
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    min-width: 200px;
}

.loading-spinner-icon {
    width: 48px;
    height: 48px;
    border: 4px solid #e9ecef;
    border-top-color: #667eea;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loading-spinner-text {
    font-size: 0.95rem;
    color: #6c757d;
    font-weight: 500;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

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

/* Button Loading States */
.btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.btn-primary.btn-loading::after {
    border-top-color: white;
}

.btn-secondary.btn-loading::after,
.btn-outline-primary.btn-loading::after,
.btn-outline-danger.btn-loading::after {
    border-top-color: #667eea;
}

/* Inline Loading States */
.loading-inline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #6c757d;
    font-size: 0.875rem;
}

.loading-inline-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid #e9ecef;
    border-top-color: #667eea;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, #f0f0f0 0%, #e0e0e0 50%, #f0f0f0 100%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 4px;
}

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

.skeleton-text {
    height: 1em;
    margin-bottom: 0.5em;
}

.skeleton-title {
    height: 1.5em;
    width: 60%;
    margin-bottom: 1em;
}

.skeleton-card {
    height: 200px;
    border-radius: 12px;
}