.flash-message {
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: 0.875rem;
    width: min(720px, calc(100% - 2rem));
    margin: 1rem auto;
    padding: 1rem 3.25rem 1rem 1rem;
    border: 1px solid;
    border-left-width: 5px;
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.1);
    font-size: 1rem;
    line-height: 1.5;
    animation: flash-message-in 180ms ease-out;
    z-index: 1050;
}

.flash-message__icon {
    flex: 0 0 auto;
    width: 1.5rem;
    height: 1.5rem;
    margin-top: 0.05rem;
}

.flash-message__text {
    flex: 1 1 auto;
    font-weight: 600;
}

.flash-message__close {
    position: absolute;
    top: 0.65rem;
    right: 0.65rem;
    width: 2rem;
    height: 2rem;
    padding: 0;
    border: 0;
    border-radius: 50%;
    background: transparent;
    color: inherit;
    font: inherit;
    font-size: 1.4rem;
    line-height: 1;
    cursor: pointer;
    opacity: 0.7;
}

.flash-message__close:hover,
.flash-message__close:focus-visible {
    background: rgba(15, 23, 42, 0.08);
    opacity: 1;
    outline: none;
}

.flash-message--success {
    color: #166534;
    background: #f0fdf4;
    border-color: #86efac;
    border-left-color: #16a34a;
}

.flash-message--error {
    color: #991b1b;
    background: #fef2f2;
    border-color: #fca5a5;
    border-left-color: #dc2626;
}

.flash-message--info {
    color: #1e40af;
    background: #eff6ff;
    border-color: #93c5fd;
    border-left-color: #2563eb;
}

.flash-message--warning {
    color: #92400e;
    background: #fffbeb;
    border-color: #fcd34d;
    border-left-color: #d97706;
}

.flash-message.is-hidden {
    display: none;
}

@keyframes flash-message-in {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
    .flash-message { animation: none; }
}