:root {
    --toast-success-bg: #0f766e;
    --toast-success-border: #14b8a6;
    --toast-error-bg: #991b1b;
    --toast-error-border: #ef4444;
    --toast-warning-bg: #854d0e;
    --toast-warning-border: #f59e0b;
    --toast-info-bg: #1e3a8a;
    --toast-info-border: #3b82f6;
}

.toast-viewport {
    position: fixed;
    top: 18px;
    right: 18px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
    width: min(420px, calc(100vw - 24px));
}

.toast-item {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 8px;
    align-items: start;
    pointer-events: auto;
    color: #f8fafc;
    border-radius: 12px;
    border: 1px solid transparent;
    box-shadow: 0 12px 26px rgba(2, 6, 23, 0.26);
    padding: 12px 12px;
    opacity: 0;
    transform: translateY(-6px) scale(0.98);
    transition: opacity 220ms ease, transform 220ms ease;
}

.toast-item.is-visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.toast-item.is-closing {
    opacity: 0;
    transform: translateY(-6px) scale(0.98);
}

.toast-item[data-type='success'] {
    background: linear-gradient(135deg, rgba(15, 118, 110, 0.98), rgba(20, 184, 166, 0.92));
    border-color: var(--toast-success-border);
}

.toast-item[data-type='error'] {
    background: linear-gradient(135deg, rgba(153, 27, 27, 0.98), rgba(239, 68, 68, 0.92));
    border-color: var(--toast-error-border);
}

.toast-item[data-type='warning'] {
    background: linear-gradient(135deg, rgba(133, 77, 14, 0.98), rgba(245, 158, 11, 0.92));
    border-color: var(--toast-warning-border);
}

.toast-item[data-type='info'] {
    background: linear-gradient(135deg, rgba(30, 58, 138, 0.98), rgba(59, 130, 246, 0.92));
    border-color: var(--toast-info-border);
}

.toast-message {
    margin: 0;
    font-size: 0.92rem;
    line-height: 1.35;
    font-weight: 700;
}

.toast-close {
    appearance: none;
    border: none;
    background: rgba(15, 23, 42, 0.25);
    color: #ffffff;
    font-size: 18px;
    line-height: 1;
    width: 28px;
    height: 28px;
    border-radius: 8px;
    cursor: pointer;
}

.toast-close:hover {
    background: rgba(15, 23, 42, 0.45);
}

@media (max-width: 640px) {
    .toast-viewport {
        right: 50%;
        transform: translateX(50%);
        top: 12px;
        width: calc(100vw - 20px);
    }
}