/**
 * DataScience Theme – Supplementary Premium Styles
 * Additional visual polish loaded alongside style.css
 */

/* ── Premium Selection Colors ── */
::selection {
    background: rgba(37, 99, 235, 0.15);
    color: var(--text-dark);
}

/* ── Smooth Scrollbar ── */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--light-bg);
}
::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-light) 0%, var(--primary) 100%);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* ── Focus Visible Ring ── */
*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 3px;
    border-radius: 4px;
}

/* ── Entry Content Typography ── */
.entry-content h2 {
    font-size: 28px;
    font-weight: 800;
    color: var(--text-dark);
    margin: 40px 0 16px;
    letter-spacing: -0.02em;
}

.entry-content h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-dark);
    margin: 32px 0 12px;
}

.entry-content p {
    margin-bottom: 20px;
    line-height: 1.8;
    color: var(--text-body);
}

.entry-content ul, .entry-content ol {
    margin: 16px 0 24px 24px;
    color: var(--text-body);
}

.entry-content li {
    margin-bottom: 8px;
    line-height: 1.7;
}

.entry-content blockquote {
    border-left: 4px solid var(--primary);
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.04) 0%, transparent 100%);
    padding: 24px 28px;
    margin: 28px 0;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
    color: var(--text-gray);
}

.entry-content img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.entry-content a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color 0.2s ease;
}

.entry-content a:hover {
    color: var(--primary-dark);
}

/* ── Gradient Text Utility ── */
.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ── Glass Card Utility ── */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
}

/* ── Pulse Dot ── */
@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.5); opacity: 0.5; }
}

.pulse-dot {
    width: 8px;
    height: 8px;
    background: var(--emerald);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

/* ── Shimmer Loading ── */
@keyframes shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

.shimmer {
    background: linear-gradient(90deg, var(--border-light) 25%, var(--white) 50%, var(--border-light) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.8s infinite;
}