/* 계산 결과 카드 하단 "상세 산출 근거 및 가이드" 아코디언 — 기존 .result-panel/.glass-panel
   스타일은 건드리지 않고, 그 안 맨 끝에 붙는 새 블록에 대한 스타일만 정의한다. */
.calc-guide-accordion {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px dashed var(--panel-border);
}

.calc-guide-toggle {
    display: flex;
    align-items: center;
    gap: 6px;
    width: 100%;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--text-muted);
    padding: 4px 2px;
    font-family: inherit;
    letter-spacing: -0.02em;
}

.calc-guide-toggle:hover {
    color: var(--accent-color);
}

.calc-guide-toggle-arrow {
    display: inline-block;
    font-size: 10px;
    transition: transform 0.25s ease;
}

.calc-guide-accordion.is-open .calc-guide-toggle-arrow {
    transform: rotate(180deg);
}

.calc-guide-accordion.is-open .calc-guide-toggle {
    color: var(--accent-color);
}

.calc-guide-body {
    max-height: 0px;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.calc-guide-body h4 {
    margin: 12px 0 4px;
    font-size: 12px;
    font-weight: 700;
    color: var(--text-secondary);
}

.calc-guide-body h4:first-child {
    margin-top: 10px;
}

.calc-guide-body p {
    margin: 0;
    font-size: 12.5px;
    line-height: 1.65;
    color: var(--text-secondary);
}

.calc-guide-formula {
    font-family: 'SF Mono', 'Consolas', monospace;
    background: var(--accent-light);
    border-radius: 8px;
    padding: 8px 10px;
    color: var(--text-primary) !important;
    font-size: 11.5px !important;
    word-break: break-word;
}

.calc-guide-blog-link {
    display: inline-block;
    margin-top: 12px;
    margin-bottom: 4px;
    font-size: 12px;
    font-weight: 700;
    color: var(--accent-color);
    text-decoration: none;
}

.calc-guide-blog-link:hover {
    text-decoration: underline;
}