/* CAS Common Chemistry — product information modal */
.cas-info-modal {
    position: fixed;
    inset: 0;
    z-index: 1100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.25rem;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.28s ease, visibility 0.28s ease;
}
.cas-info-modal.is-open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}
.cas-info-modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.55);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}
.cas-info-modal__panel {
    position: relative;
    width: 100%;
    max-width: 920px;
    max-height: min(90vh, 720px);
    background: #fff;
    border-radius: 16px;
    box-shadow:
        0 4px 6px -2px rgba(15, 23, 42, 0.06),
        0 24px 48px -12px rgba(15, 23, 42, 0.28);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: translateY(16px) scale(0.98);
    transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1);
}
.cas-info-modal.is-open .cas-info-modal__panel {
    transform: translateY(0) scale(1);
}
.cas-info-modal__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.35rem 1.5rem 1.1rem;
    border-bottom: 1px solid #e8ecf4;
    background: linear-gradient(180deg, #fafbff 0%, #fff 100%);
    flex-shrink: 0;
}
.cas-info-modal__title {
    font-size: 1.35rem;
    font-weight: 800;
    color: #0f172a;
    margin: 0 0 0.25rem;
    letter-spacing: -0.02em;
    line-height: 1.3;
}
.cas-info-modal__subtitle {
    font-size: 0.8125rem;
    color: #64748b;
    margin: 0;
}
.cas-info-modal__close {
    flex-shrink: 0;
    width: 2.25rem;
    height: 2.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #e2e8f0;
    background: #fff;
    border-radius: 8px;
    color: #64748b;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}
.cas-info-modal__close:hover {
    background: #f1f5f9;
    color: #0f172a;
    border-color: #cbd5e1;
}
.cas-info-modal__body {
    flex: 1;
    overflow-y: auto;
    padding: 1.35rem 1.5rem 1.5rem;
}
.cas-info-modal__layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.25rem;
    align-items: start;
}
@media (min-width: 768px) {
    .cas-info-modal__layout {
        grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
        gap: 1.5rem;
    }
}
.cas-info-modal__left,
.cas-info-modal__right {
    min-width: 0;
    max-width: 100%;
    overflow: hidden;
}
.cas-info-modal__structure {
    border: 1px solid #e8ecf4;
    border-radius: 12px;
    padding: 1.5rem 1rem;
    margin-bottom: 1.25rem;
    background: #fff;
    text-align: center;
    overflow: hidden;
    max-width: 100%;
    min-height: 240px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.cas-info-modal__structure svg,
.cas-info-modal__structure-svg {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
    max-height: 320px;
    margin: 0 auto;
}
.cas-info-modal__structure--empty {
    min-height: 200px;
}
.cas-info-modal__rn {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    color: #1C39BB;
    margin-bottom: 0.85rem;
    letter-spacing: -0.02em;
}
.cas-info-modal__facts {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
}
.cas-info-modal__facts li {
    font-size: 0.9375rem;
    line-height: 1.5;
    color: #334155;
    overflow-wrap: anywhere;
    word-break: break-word;
}
.cas-info-modal__facts strong {
    display: block;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: #94a3b8;
    margin-bottom: 0.25rem;
}
.cas-info-modal__fact-value {
    display: block;
    font-size: 1rem;
    font-weight: 500;
    overflow-wrap: anywhere;
    word-break: break-word;
    max-width: 100%;
}
.cas-info-modal__fact-value sub,
.cas-info-modal__fact-value sup {
    font-size: 0.82em;
    line-height: 0;
}
.cas-info-modal__section {
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 1rem 1.1rem;
    margin-bottom: 1rem;
}
.cas-info-modal__section:last-child {
    margin-bottom: 0;
}
.cas-info-modal__section-title {
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #1C39BB;
    margin: 0 0 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #e8ecf4;
}
.cas-info-modal__props {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}
.cas-info-modal__prop {
    font-size: 0.8125rem;
    line-height: 1.5;
    color: #334155;
}
.cas-info-modal__prop-name {
    font-weight: 700;
    color: #0f172a;
}
.cas-info-modal__prop-source {
    display: block;
    font-size: 0.7rem;
    color: #94a3b8;
    margin-top: 0.15rem;
}
.cas-info-modal__ids {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}
.cas-info-modal__id-row {
    font-size: 0.75rem;
    line-height: 1.5;
    overflow-wrap: anywhere;
    word-break: break-word;
}
.cas-info-modal__id-row strong {
    display: block;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: #94a3b8;
    margin-bottom: 0.35rem;
}
.cas-info-modal__id-value {
    display: block;
    overflow-wrap: anywhere;
    word-break: break-word;
}
.cas-info-modal__synonyms {
    list-style: disc;
    margin: 0;
    padding-left: 1.15rem;
    font-size: 0.8125rem;
    color: #475569;
    line-height: 1.55;
}
.cas-info-modal__synonyms li {
    margin-bottom: 0.2rem;
    overflow-wrap: anywhere;
    word-break: break-word;
}
@media (max-width: 767px) {
    .cas-info-modal {
        padding: 0.75rem;
        align-items: flex-end;
    }
    .cas-info-modal__panel {
        max-height: 92vh;
        border-radius: 16px 16px 0 0;
    }
    .cas-info-modal__body {
        padding: 1rem 1.1rem 1.25rem;
    }
    .cas-info-modal__rn {
        font-size: 1.25rem;
    }
}
.cas-info-modal__more {
    font-size: 0.75rem;
    color: #64748b;
    margin-top: 0.5rem;
    font-style: italic;
}
/* Loading & error */
.cas-info-modal__loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 3rem 1.5rem;
    text-align: center;
}
.cas-info-modal__spinner {
    width: 2.5rem;
    height: 2.5rem;
    border: 3px solid #e2e8f0;
    border-top-color: #1C39BB;
    border-radius: 50%;
    animation: cas-info-spin 0.75s linear infinite;
}
@keyframes cas-info-spin {
    to { transform: rotate(360deg); }
}
.cas-info-modal__loading-text {
    font-size: 0.875rem;
    color: #64748b;
    margin: 0;
}
.cas-info-modal__error {
    padding: 2rem 1.5rem;
    text-align: center;
}
.cas-info-modal__error-icon {
    width: 3rem;
    height: 3rem;
    margin: 0 auto 1rem;
    color: #f87171;
}
.cas-info-modal__error-title {
    font-size: 1rem;
    font-weight: 700;
    color: #0f172a;
    margin: 0 0 0.5rem;
}
.cas-info-modal__error-msg {
    font-size: 0.8125rem;
    color: #64748b;
    margin: 0;
    line-height: 1.55;
}

/* Table info button — icon only */
.product-info-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.25rem;
    height: 2.25rem;
    padding: 0;
    color: #1C39BB;
    background: rgba(28, 57, 187, 0.08);
    border: 1px solid rgba(28, 57, 187, 0.18);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.22s ease;
    font-family: inherit;
}
.product-info-btn:hover {
    background: #1C39BB;
    color: #fff;
    border-color: #1C39BB;
    box-shadow: 0 4px 12px rgba(28, 57, 187, 0.25);
}
.product-info-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
}
.product-info-btn svg {
    flex-shrink: 0;
}

@media (prefers-reduced-motion: reduce) {
    .cas-info-modal,
    .cas-info-modal__panel,
    .cas-info-modal__spinner {
        transition: none;
        animation: none;
    }
}