/**
 * Grad-CAM Heatmap Viewer Styles (Phase E)
 *
 * Phase E 추가:
 *   - .heatmap-watermark : 이미지 우하단 반투명 경고 오버레이
 *   - .heatmap-warning 색상 변수화
 */

/* ─────────────────────────────────────────────
   1. 뷰어 래퍼
───────────────────────────────────────────── */
.heatmap-viewer {
    margin-top: 1.5rem;
    border: 1px solid var(--color-border-light, rgba(255,255,255,0.08));
    border-radius: var(--radius-md, 12px);
    overflow: hidden;
    background: var(--color-surface, #141416);
    animation: fadeInUp 0.4s ease both;
}

.heatmap-viewer--hidden {
    display: none;
}

/* ─────────────────────────────────────────────
   2. 헤더
───────────────────────────────────────────── */
.heatmap-viewer__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.875rem 1.25rem;
    background: rgba(255,255,255,0.03);
    border-bottom: 1px solid var(--color-border-light, rgba(255,255,255,0.08));
    flex-wrap: wrap;
    gap: 0.5rem;
}

.heatmap-viewer__title {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-text-muted, #8a8a8e);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.heatmap-viewer__title i { color: var(--color-primary, #c9a96e); }

/* ─────────────────────────────────────────────
   3. 신뢰도 배지
───────────────────────────────────────────── */
.heatmap-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.25rem 0.65rem;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    border: 1px solid currentColor;
}

.heatmap-badge--high        { color: #4ade80; background: rgba(74,222,128,0.1); }
.heatmap-badge--medium      { color: #fbbf24; background: rgba(251,191,36,0.1); }
.heatmap-badge--low         { color: #f87171; background: rgba(248,113,113,0.1); }
.heatmap-badge--unavailable { color: var(--color-text-muted,#8a8a8e); background: rgba(138,138,142,0.1); }

/* ─────────────────────────────────────────────
   4. 탭 버튼 그룹
───────────────────────────────────────────── */
.heatmap-tabs {
    display: flex;
    border-bottom: 1px solid var(--color-border-light, rgba(255,255,255,0.08));
    background: rgba(0,0,0,0.2);
    overflow-x: auto;
    scrollbar-width: none;
}
.heatmap-tabs::-webkit-scrollbar { display: none; }

.heatmap-tab {
    flex: 1;
    min-width: 90px;
    padding: 0.6rem 1rem;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--color-text-muted, #8a8a8e);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s, background 0.2s;
    white-space: nowrap;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
}
.heatmap-tab:hover           { color: var(--color-text,#e8e8ea); background: rgba(255,255,255,0.03); }
.heatmap-tab--active         { color: var(--color-primary,#c9a96e); border-bottom-color: var(--color-primary,#c9a96e); background: rgba(201,169,110,0.05); }
.heatmap-tab:disabled        { opacity: 0.35; cursor: not-allowed; }

/* ─────────────────────────────────────────────
   5. 이미지 패널
───────────────────────────────────────────── */
.heatmap-panels { padding: 1.25rem; }

.heatmap-panel              { display: none; animation: fadeIn 0.25s ease; }
.heatmap-panel--active      { display: block; }

.heatmap-panel--compare                       { display: none; grid-template-columns: 1fr 1fr; gap: 1rem; align-items: start; }
.heatmap-panel--compare.heatmap-panel--active { display: grid; }

@media (max-width: 600px) {
    .heatmap-panel--compare.heatmap-panel--active { grid-template-columns: 1fr; }
}

.heatmap-img-wrap {
    position: relative;
    border-radius: var(--radius-sm, 8px);
    overflow: hidden;
    background: #000;
    aspect-ratio: 1 / 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.heatmap-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.heatmap-img-label {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    padding: 0.35rem 0.6rem;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--color-text-muted, #8a8a8e);
    text-transform: uppercase;
    letter-spacing: 0.07em;
    text-align: center;
}

/* ─────────────────────────────────────────────
   6. Phase E-3: 워터마크 오버레이
───────────────────────────────────────────── */
.heatmap-watermark {
    position: absolute;
    bottom: 28px;         /* heatmap-img-label 위 */
    right: 6px;
    font-size: 0.55rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    color: rgba(255,255,255,0.45);
    background: rgba(0,0,0,0.35);
    padding: 2px 5px;
    border-radius: 3px;
    pointer-events: none;
    user-select: none;
    white-space: nowrap;
}

/* ─────────────────────────────────────────────
   7. 범례 (색상 → 주목도 바)
───────────────────────────────────────────── */
.heatmap-legend { margin-top: 0.75rem; padding: 0 0.25rem; }

.heatmap-legend__bar {
    height: 8px;
    border-radius: 999px;
    background: linear-gradient(to right,
        #000080, #00aaff, #00ff88, #ffff00, #ff4400, #ff0000
    );
}

.heatmap-legend__labels {
    display: flex;
    justify-content: space-between;
    margin-top: 0.3rem;
}
.heatmap-legend__label { font-size: 0.62rem; color: var(--color-text-muted,#8a8a8e); letter-spacing: 0.04em; }

/* ─────────────────────────────────────────────
   8. 경고 / 고지 박스
───────────────────────────────────────────── */
.heatmap-desc {
    margin-top: 0.75rem;
    font-size: 0.72rem;
    color: var(--color-text-muted, #8a8a8e);
    line-height: 1.6;
    padding: 0 0.125rem;
}

.heatmap-warning {
    margin-top: 0.75rem;
    padding: 0.6rem 0.85rem;
    background: rgba(248,113,113,0.07);
    border: 1px solid rgba(248,113,113,0.2);
    border-radius: var(--radius-sm, 8px);
    font-size: 0.7rem;
    color: #f87171;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    line-height: 1.5;
}
.heatmap-warning i { flex-shrink: 0; margin-top: 0.05rem; }

/* ─────────────────────────────────────────────
   9. 비활성화 상태
───────────────────────────────────────────── */
.heatmap-unavailable {
    padding: 2rem 1.5rem;
    text-align: center;
    color: var(--color-text-muted, #8a8a8e);
}
.heatmap-unavailable i  { font-size: 2rem; margin-bottom: 0.75rem; display: block; opacity: 0.4; }
.heatmap-unavailable p  { font-size: 0.78rem; line-height: 1.6; max-width: 280px; margin: 0 auto; }

/* ─────────────────────────────────────────────
   10. 주목도 스코어 바
───────────────────────────────────────────── */
.heatmap-score {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.75rem;
    padding: 0.6rem 0.85rem;
    background: rgba(201,169,110,0.06);
    border: 1px solid rgba(201,169,110,0.15);
    border-radius: var(--radius-sm, 8px);
}
.heatmap-score__label   { font-size: 0.7rem; color: var(--color-text-muted,#8a8a8e); white-space: nowrap; }
.heatmap-score__bar-wrap { flex: 1; height: 5px; background: rgba(255,255,255,0.06); border-radius: 999px; overflow: hidden; }
.heatmap-score__bar     { height: 100%; background: var(--color-primary,#c9a96e); border-radius: 999px; transition: width 0.6s cubic-bezier(0.25,0.46,0.45,0.94); }
.heatmap-score__value   { font-size: 0.72rem; font-weight: 700; color: var(--color-primary,#c9a96e); min-width: 2.5rem; text-align: right; }

/* ─────────────────────────────────────────────
   11. 애니메이션
───────────────────────────────────────────── */
@keyframes fadeIn    { from { opacity: 0; }            to { opacity: 1; } }
@keyframes fadeInUp  { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }