/* ========================================
   Toast Notification System
   ======================================== */

.toast-container {
    position: fixed;
    bottom: calc(var(--spacing-xl) + env(safe-area-inset-bottom, 0px));
    left: 50%;
    transform: translateX(-50%);
    z-index: var(--z-index-toast);
    display: flex;
    flex-direction: column-reverse;
    gap: var(--spacing-md);
    pointer-events: none;
}

.toast {
    background: rgba(15, 23, 42, 0.94);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-left: 4px solid rgba(255, 255, 255, 0.12);
    padding: 14px 16px;
    border-radius: 14px;
    box-shadow: 0 18px 40px rgba(2, 6, 23, 0.35);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    width: min(560px, calc(100vw - 32px));
    pointer-events: auto;
    animation: slideInUp 0.22s var(--transition-timing);
}

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

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

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

.toast.toast-info {
    border-left-color: var(--color-primary);
}

.toast-icon {
    font-size: 20px;
    flex-shrink: 0;
}

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

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

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

.toast-info .toast-icon {
    color: var(--color-primary);
}

.toast-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.toast-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: rgba(255, 255, 255, 0.92);
}

.toast-message {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.82);
    line-height: var(--line-height-relaxed);
}

.toast-close {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.75);
    font-size: var(--font-size-xl);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: 10px;
    transition: background var(--transition-fast) var(--transition-timing),
                color var(--transition-fast) var(--transition-timing);
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toast-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.92);
}

.toast.fade-out {
    animation: fadeOut 0.3s var(--transition-timing) forwards;
}

/* Progress bar */
.toast-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background: var(--color-neutral-300);
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
    animation: progress 3s linear forwards;
}

.toast-success .toast-progress {
    background: var(--color-success);
}

.toast-error .toast-progress {
    background: var(--color-error);
}

.toast-warning .toast-progress {
    background: var(--color-warning);
}

.toast-info .toast-progress {
    background: var(--color-primary);
}

/* Animations */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(14px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(14px);
    }
}

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

/* Responsive */
@media (max-width: 768px) {
    .toast-container {
        bottom: calc(var(--spacing-lg) + env(safe-area-inset-bottom, 0px));
        left: 50%;
        transform: translateX(-50%);
    }
    
    .toast {
        width: calc(100vw - 24px);
    }
}