:root {
    --md-callout-info-bg: #f4f9ff;
    --md-callout-info-border: #2d8cf0;
    --md-callout-warning-bg: #fffaf2;
    --md-callout-warning-border: #f39c12;
    --md-callout-error-bg: #fff5f5;
    --md-callout-error-border: #e74c3c;
    --md-callout-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    --md-callout-radius: 12px;
}

.md-callout {
    position: relative;
    margin: 1.5rem 0;
    padding: 1rem 1.2rem 1rem 1.2rem;
    border-left: 6px solid var(--md-callout-info-border);
    border-radius: var(--md-callout-radius);
    box-shadow: var(--md-callout-shadow);
    background: var(--md-callout-info-bg);
    overflow: hidden;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.md-callout.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.md-callout::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.5), transparent 40%);
    pointer-events: none;
    opacity: 0.4;
}

.md-callout__badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35em;
    padding: 0.2em 0.7em;
    border-radius: 999px;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    color: #0f172a;
    background: rgba(255, 255, 255, 0.65);
    border: 1px solid rgba(0, 0, 0, 0.05);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.5);
    margin-bottom: 0.6rem;
}

.md-callout__body {
    position: relative;
    z-index: 1;
    color: #0f172a;
    line-height: 1.65;
}

.md-callout p {
    margin: 0 0 0.6em;
}

.md-callout p:last-child {
    margin-bottom: 0;
}

.md-callout--info {
    background: var(--md-callout-info-bg);
    border-color: var(--md-callout-info-border);
}

.md-callout--info .md-callout__badge {
    color: #0f1c2e;
}

.md-callout--warning {
    background: var(--md-callout-warning-bg);
    border-color: var(--md-callout-warning-border);
}

.md-callout--warning .md-callout__badge {
    color: #4a2f00;
}

.md-callout--error {
    background: var(--md-callout-error-bg);
    border-color: var(--md-callout-error-border);
}

.md-callout--error .md-callout__badge {
    color: #5b0f0f;
}

/* Shimmer accent */
.md-callout::before {
    content: '';
    position: absolute;
    top: 0;
    left: -40%;
    width: 30%;
    height: 100%;
    background: linear-gradient(120deg, transparent, rgba(255, 255, 255, 0.35), transparent);
    transform: skewX(-20deg);
    animation: callout-shimmer 4s ease-in-out infinite;
    pointer-events: none;
}

@keyframes callout-shimmer {
    0% {
        left: -40%;
    }
    60% {
        left: 120%;
    }
    100% {
        left: 120%;
    }
}