/* === SIMILAR NEWS BUTTON === */
.similar-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.8rem;
    color: var(--fg-faint);
    padding: 0 0.2rem;
    line-height: 1;
    transition: color 0.2s;
    -webkit-text-stroke: 0.3px var(--bg);
}
.similar-btn:hover {
    color: var(--accent);
}

/* === MODAL === */
.similar-modal-overlay {
    position: fixed;
    inset: 0;
    background: none;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.25s ease;
}
.similar-modal-overlay.ready {
    opacity: 1;
}

.similar-modal {
    background: rgba(var(--bg-rgb), 0.82);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-left: 3px solid var(--accent);
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    position: relative;
    display: flex;
    flex-direction: column;
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
}

.similar-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.8rem 1.2rem 0.5rem;
    border-bottom: 1px solid rgba(var(--fg-rgb), 0.08);
    flex-shrink: 0;
}

.similar-modal-title {
    font-family: -apple-system, system-ui, "Helvetica Neue", sans-serif;
    font-size: 0.62rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--fg-muted);
}

.similar-modal-close {
    background: none;
    border: none;
    font-size: 1.3rem;
    color: var(--fg-muted);
    cursor: pointer;
    line-height: 1;
    padding: 0.4rem 0.5rem;
    margin: -0.4rem -0.5rem -0.4rem 0;
    transition: color 0.15s;
}
.similar-modal-close:hover {
    color: var(--fg);
}

/* === GRAPH CONTAINER === */
.similar-graph-container {
    flex: 1;
    min-height: 0;
    overflow: hidden;
    position: relative;
}
.similar-graph-container canvas {
    display: block;
}

/* === LEGEND === */
.similar-modal-legend {
    display: flex;
    gap: 1.2rem;
    justify-content: center;
    padding: 0.6rem 1rem 0.8rem;
    border-top: 1px solid rgba(var(--fg-rgb), 0.08);
    flex-shrink: 0;
}

.similar-legend-item {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    font-family: -apple-system, system-ui, "Helvetica Neue", sans-serif;
    font-size: 0.6rem;
    color: var(--fg-muted);
}

.similar-legend-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}
.similar-legend-dot.dot-source  { background: #3a8a7d; }
.similar-legend-dot.dot-center  { background: #b8862a; }
.similar-legend-dot.dot-item    { background: #a35d4f; }
.similar-legend-dot.dot-article { background: #5a6a7a; }

[data-theme="dark"] .similar-legend-dot.dot-source { background: #5bab9e; }
[data-theme="dark"] .similar-legend-dot.dot-center { background: #d4a24e; }
[data-theme="dark"] .similar-legend-dot.dot-item   { background: #c47a6c; }
[data-theme="dark"] .similar-legend-dot.dot-article { background: #7a8fa3; }

/* === LOADING / EMPTY === */
.similar-modal-loading,
.similar-modal-empty {
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: -apple-system, system-ui, "Helvetica Neue", sans-serif;
    font-size: 0.8rem;
    color: var(--fg-faint);
}

.similar-modal-loading {
    flex: 1;
    min-height: 300px;
    animation: similar-pulse 1.5s ease-in-out infinite;
}
@keyframes similar-pulse {
    0%, 100% { opacity: 0.4; }
    50%      { opacity: 1; }
}

.similar-modal-empty {
    min-height: 200px;
}

/* === MOBILE === */
@media (max-width: 600px) {
    .similar-modal-header {
        padding: 0.6rem 0.8rem 0.4rem;
    }
    .similar-modal-close {
        font-size: 1.6rem;
        padding: 0.6rem 0.7rem;
        margin: -0.6rem -0.7rem -0.6rem 0;
    }
    .similar-modal-legend {
        gap: 0.6rem;
        padding: 0.4rem 0.6rem 0.5rem;
        flex-wrap: wrap;
    }
    .similar-legend-item {
        font-size: 0.52rem;
    }
}