.hdv2-cah-lang-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    height: 2.1rem;
    padding: 0 0.6rem;
    border: 1px solid var(--hdv2-cah-border);
    border-radius: 0.5rem;
    background: var(--hdv2-cah-card);
    color: var(--hdv2-cah-fg);
    font-size: 0.82rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.15s ease, border-color 0.15s ease;
}

.hdv2-cah-lang-btn:hover {
    background: var(--hdv2-cah-accent);
    border-color: hsl(217.2 91.2% 59.8% / 0.35);
}

.hdv2-cah-lang-btn__label {
    max-width: 110px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.hdv2-cah-lang-btn__caret {
    color: var(--hdv2-cah-muted);
    flex: 0 0 auto;
    transition: transform 0.18s ease;
}

.hdv2-cah-lang-btn[aria-expanded="true"] .hdv2-cah-lang-btn__caret {
    transform: rotate(180deg);
}

.hdv2-cah-lang-flag {
    width: 1.05rem;
    height: 0.72rem;
    border-radius: 2px;
    border: 1px solid var(--hdv2-cah-border);
    background-color: var(--hdv2-cah-bg);
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    flex: 0 0 auto;
    display: inline-block;
}

.hdv2-cah-lang-flag.is-trigger {
    width: 0.95rem;
    height: 0.66rem;
}

.hdv2-cah-lang-flag.is-empty {
    opacity: 0.45;
}

.hdv2-cah-lang-modal {
    position: fixed;
    inset: 0;
    z-index: 1100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    transition: opacity 0.18s ease;
}

.hdv2-cah-lang-modal[hidden] {
    display: none !important;
}

.hdv2-cah-lang-modal.is-open {
    opacity: 1;
}

.hdv2-cah-lang-modal__backdrop {
    position: absolute;
    inset: 0;
    background: hsl(240 10% 8% / 0.55);
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
}

.hdv2-cah-lang-modal__panel {
    position: relative;
    width: 100%;
    max-width: 26rem;
    max-height: min(32rem, calc(100vh - 2rem));
    display: flex;
    flex-direction: column;
    min-height: 0;
    background: var(--hdv2-cah-card);
    color: var(--hdv2-cah-fg);
    font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    border: 1px solid var(--hdv2-cah-border);
    border-radius: 0.85rem;
    box-shadow: 0 20px 50px hsl(240 10% 4% / 0.25), 0 4px 14px hsl(240 10% 4% / 0.12);
    transform: translateY(0.5rem) scale(0.98);
    transition: transform 0.2s ease;
    overflow: hidden;
}

.hdv2-cah-lang-modal.is-open .hdv2-cah-lang-modal__panel {
    transform: translateY(0) scale(1);
}

.hdv2-cah-lang-modal__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 1rem 1.15rem 0.85rem;
    border-bottom: 1px solid var(--hdv2-cah-border);
    flex: 0 0 auto;
}

.hdv2-cah-lang-modal__head h3 {
    margin: 0;
    font-size: 0.98rem;
    font-weight: 600;
    color: var(--hdv2-cah-fg);
}

.hdv2-cah-lang-modal__close {
    width: 2rem;
    height: 2rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: 0;
    border-radius: 0.45rem;
    background: transparent;
    color: var(--hdv2-cah-muted);
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease;
}

.hdv2-cah-lang-modal__close:hover {
    background: var(--hdv2-cah-accent);
    color: var(--hdv2-cah-fg);
}

.hdv2-cah-lang-modal__list {
    flex: 1 1 auto;
    min-height: 0;
    padding: 0.5rem;
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: hsl(217.2 91.2% 59.8% / 0.45) transparent;
}

.hdv2-cah-lang-modal__list::-webkit-scrollbar {
    width: 0.45rem;
}

.hdv2-cah-lang-modal__list::-webkit-scrollbar-track {
    background: transparent;
}

.hdv2-cah-lang-modal__list::-webkit-scrollbar-thumb {
    background: hsl(217.2 91.2% 59.8% / 0.35);
    border-radius: 999px;
}

.hdv2-cah-lang-modal__list::-webkit-scrollbar-thumb:hover {
    background: hsl(217.2 91.2% 59.8% / 0.55);
}

.hdv2-cah-lang-option {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.6rem 0.7rem;
    border-radius: 0.55rem;
    color: var(--hdv2-cah-fg);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 500;
    font-family: inherit;
    line-height: 1.2;
    transition: background 0.12s ease;
}

.hdv2-cah-lang-option + .hdv2-cah-lang-option {
    margin-top: 0.15rem;
}

.hdv2-cah-lang-option:hover,
.hdv2-cah-lang-option:focus-visible {
    background: var(--hdv2-cah-accent);
    color: var(--hdv2-cah-fg);
    outline: none;
    text-decoration: none;
}

.hdv2-cah-lang-option.is-active {
    background: var(--hdv2-cah-accent);
    color: var(--hdv2-cah-fg);
    font-weight: 600;
}

.hdv2-cah-lang-option__name {
    flex: 1 1 auto;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.hdv2-cah-lang-option__check {
    flex: 0 0 auto;
    margin-left: auto;
    width: 1.15rem;
    height: 1.15rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: hsl(217.2 91.2% 55%);
    opacity: 0;
    transform: scale(0.8);
    transition: opacity 0.15s ease, transform 0.15s ease;
}

:root[data-hdv2-theme="dark"] .hdv2-cah-lang-option__check {
    color: hsl(213 94% 78%);
}

.hdv2-cah-lang-option.is-active .hdv2-cah-lang-option__check {
    opacity: 1;
    transform: scale(1);
}

@media (max-width: 540px) {
    .hdv2-cah-lang-btn__label {
        display: none;
    }

    .hdv2-cah-lang-btn {
        padding: 0 0.5rem;
        gap: 0.35rem;
    }
}