:root {
    --brand-primary: #0b5ed7;
    --brand-primary-dark: #08409a;
    --brand-bg: #f4f6f9;
}

body {
    background-color: var(--brand-bg);
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

.app-navbar {
    background: linear-gradient(90deg, var(--brand-primary-dark), var(--brand-primary));
}

.login-page {
    background: linear-gradient(135deg, var(--brand-primary-dark), var(--brand-primary));
}

.login-card {
    width: 100%;
    max-width: 420px;
    border-radius: 1rem;
}

.lang-flag-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.5rem 0.75rem;
    border: 2px solid #e2e6ea;
    border-radius: 0.5rem;
    cursor: pointer;
    font-weight: 500;
    color: #495057;
    transition: border-color 0.15s ease, background-color 0.15s ease;
    user-select: none;
}

.lang-flag-btn:hover {
    border-color: var(--brand-primary);
}

.btn-check:checked + .lang-flag-btn {
    border-color: var(--brand-primary);
    background-color: rgba(11, 94, 215, 0.08);
    color: var(--brand-primary-dark);
}

.lang-flag {
    font-size: 1.3rem;
    line-height: 1;
}

#productTable img.thumb {
    width: 48px;
    height: 48px;
    object-fit: cover;
    border-radius: 6px;
    cursor: pointer;
    border: 1px solid #e2e6ea;
    transition: transform 0.15s ease;
}

#productTable img.thumb:hover {
    transform: scale(1.15);
}

.gallery-main-image {
    max-height: 420px;
    object-fit: contain;
    background-color: #f8f9fa;
    border: 1px solid #e2e6ea;
    width: 100%;
}

.gallery-main-wrapper .gallery-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    z-index: 5;
}

.gallery-nav-prev { left: 8px; }
.gallery-nav-next { right: 8px; }

.gallery-thumb {
    width: 70px;
    height: 70px;
    object-fit: cover;
    border-radius: 6px;
    cursor: pointer;
    border: 2px solid transparent;
    flex-shrink: 0;
    transition: border-color 0.15s ease, transform 0.15s ease;
}

.gallery-thumb:hover {
    transform: scale(1.05);
}

.gallery-thumb.active {
    border-color: var(--brand-primary);
}

.card {
    border-radius: 0.75rem;
}