/* ========================================
   Sidebar & Navigation - Modern Design
   ======================================== */

/* Sidebar Container */
.app_side_menu {
    background: var(--color-bg-card);
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
    margin-right: var(--space-lg);
    min-width: 240px;
    top: var(--space-lg);
    overflow-y: auto;
}

/* Logo Section */
.app_side_menu > div:first-child {
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 2px solid var(--color-divider);
}

.app_side_menu .logo {
    display: block;
    margin: 0 auto var(--space-md);
    width: 140px;
    transition: transform var(--transition-base);
}

.app_side_menu .logo:hover {
    transform: scale(1.05);
}

.app_side_menu > div:first-child p {
    text-align: center;
    font-weight: 600;
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    margin: 0;
}

/* Sidebar Menu */
.sidebar_menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar_menu li {
    margin-bottom: var(--space-xs);
}

.sidebar_menu a {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: 500;
    font-size: 0.9375rem;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.sidebar_menu a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3px;
    background: var(--color-primary-gradient);
    transform: scaleY(0);
    transition: transform var(--transition-base);
}

.sidebar_menu a:hover {
    background-color: var(--color-bg-secondary);
    color: var(--color-primary);
    transform: translateX(4px);
}

.sidebar_menu a:hover::before {
    transform: scaleY(1);
}

/* Icon in sidebar */
.sidebar_menu a [class^="icon-"],
.sidebar_menu a [class*=" icon-"] {
    margin-right: 0.75rem;
    font-size: 1.125rem;
    width: 1.25rem;
    text-align: center;
}

/* Selected Entry */
.sidebar_entry_selected,
.sidebar_menu a.sidebar_entry_selected {
    background: var(--color-primary-gradient);
    color: var(--color-text-white);
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

.sidebar_entry_selected::before {
    transform: scaleY(0) !important;
}

.sidebar_entry_selected:hover {
    background: var(--color-primary-gradient);
    color: var(--color-text-white);
    transform: translateX(0);
    box-shadow: var(--shadow-md);
}

/* Nested Menu Levels */
.sidebar_menu ul {
    list-style: none;
    padding-left: var(--space-lg);
    margin-top: var(--space-xs);
    margin-bottom: var(--space-xs);
}

.sidebar_menu ul a {
    font-size: 0.875rem;
    padding: 0.5rem 0.75rem;
}

/* ========================================
   Language Bar with Flags
   ======================================== */

.language_bar {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-sm);
    padding: var(--space-sm) 0;
    margin-bottom: var(--space-md);
}

.language_bar_label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    margin-right: var(--space-xs);
}

.language_selector {
    display: flex;
    gap: var(--space-xs);
    align-items: center;
}

.language_selector form {
    margin: 0;
    padding: 0;
    line-height: 1;
}

.language_flag_btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 28px;
    padding: 0;
    background: transparent;
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    overflow: hidden;
    position: relative;
}

.language_flag_btn img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.language_flag_btn:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.language_flag_btn:hover img {
    transform: scale(1.1);
}

.language_flag_btn:active {
    transform: translateY(0);
    box-shadow: none;
}

/* Active language */
.language_flag_btn.active {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(68, 176, 236, 0.2);
}

.language_flag_btn.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 6px solid var(--color-primary);
}

/* Divider between flags */
.language_divider {
    width: 1px;
    height: 20px;
    background-color: var(--color-divider);
}

/* Tooltip for language names */
.language_flag_btn[title] {
    position: relative;
}

/* Mobile Responsive */
@media screen and (max-width: 900px) {
    .app_side_menu {
        min-width: 200px;
        padding: var(--space-md);
    }

    .sidebar_menu a {
        padding: 0.625rem 0.75rem;
        font-size: 0.875rem;
    }
}

@media screen and (max-width: 700px) {
    .app_side_menu {
        display: none;
    }

    .language_bar {
        justify-content: center;
        padding: var(--space-md) 0;
    }

    .language_flag_btn {
        width: 48px;
        height: 32px;
    }
}