/* ===============================================
   Custom Menu Styles - Elegant & Refined
   Tinh tế, có điểm nhấn rõ ràng
   =============================================== */

/* ===== VERTICAL SIDEBAR MENU ===== */

/* Menu cha active - Tinh tế với điểm nhấn */
#side-menu > li.mm-active > a {
    background-color: transparent !important;
    color: #556ee6 !important;
    font-weight: 500 !important;
    position: relative;
}

/* Điểm nhấn: Border trái tinh tế với animation */
#side-menu > li.mm-active > a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 70%;
    background: linear-gradient(180deg, #667eea 0%, #764ba2 100%);
    border-radius: 0 3px 3px 0;
    box-shadow: 0 0 8px rgba(102, 126, 234, 0.4);
    animation: pulseGlow 2s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% {
        opacity: 1;
        box-shadow: 0 0 8px rgba(102, 126, 234, 0.4);
    }
    50% {
        opacity: 0.8;
        box-shadow: 0 0 12px rgba(102, 126, 234, 0.6);
    }
}

/* Subtle highlight background khi hover menu cha active */
#side-menu > li.mm-active > a:hover {
    background-color: rgba(85, 110, 230, 0.05) !important;
}

/* Icon của menu cha active - Điểm nhấn màu sắc */
#side-menu > li.mm-active > a i {
    color: #667eea !important;
    filter: drop-shadow(0 0 3px rgba(102, 126, 234, 0.3));
}

/* Text của menu cha active */
#side-menu > li.mm-active > a span {
    color: #495057 !important;
    font-weight: 500 !important;
}

/* Arrow của menu cha active */
#side-menu > li.mm-active > a.has-arrow::after {
    border-color: #667eea !important;
}

/* ===== SUBMENU STYLING ===== */

/* Submenu container - Tinh tế separation */
#side-menu .menu-sub.mm-show {
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.015) 50%, rgba(0, 0, 0, 0) 100%);
    padding: 0.5rem 0;
    border-left: 1px solid rgba(85, 110, 230, 0.08);
    margin-left: 1.5rem;
}

/* Submenu item active - Elegant & Clear */
#side-menu .menu-sub li.menu-item.active > a,
#side-menu .menu-sub li.active > a {
    background-color: rgba(85, 110, 230, 0.08) !important;
    color: #556ee6 !important;
    font-weight: 500 !important;
    border-radius: 0 6px 6px 0;
    position: relative;
    padding-left: 2.8rem;
}

/* Điểm nhấn submenu: Elegant line indicator */
#side-menu .menu-sub li.active > a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 2px;
    height: 60%;
    background: linear-gradient(180deg, #667eea 0%, #764ba2 100%);
    border-radius: 2px;
}

/* Dot secondary indicator */
#side-menu .menu-sub li.active > a::after {
    content: '';
    position: absolute;
    left: -0.75rem;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: #667eea;
    border-radius: 50%;
    border: 2px solid #ffffff;
    box-shadow: 0 0 6px rgba(102, 126, 234, 0.4);
}

/* ===== HOVER EFFECTS - Tinh tế & Responsive ===== */

/* Menu cha hover - Subtle */
#side-menu > li > a:hover {
    background-color: rgba(85, 110, 230, 0.04) !important;
    color: #495057 !important;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Menu cha hover - Icon highlight */
#side-menu > li > a:hover i {
    color: #667eea !important;
    transform: scale(1.05);
    transition: all 0.25s ease;
}

/* Submenu hover - Clear feedback */
#side-menu .menu-sub li a:hover {
    background-color: rgba(85, 110, 230, 0.06) !important;
    color: #495057 !important;
    padding-left: 2.9rem;
    transition: all 0.2s ease-in-out;
    border-radius: 0 6px 6px 0;
}

/* Active submenu hover - Enhanced */
#side-menu .menu-sub li.active a:hover {
    background-color: rgba(85, 110, 230, 0.12) !important;
    color: #556ee6 !important;
}

/* ===== TEXT & TYPOGRAPHY ===== */

/* Menu cha default text */
#side-menu > li > a {
    color: #6c757d;
    font-size: 14px;
    padding: 0.75rem 1.5rem;
    letter-spacing: 0.01em;
}

/* Submenu text - Hierarchy */
#side-menu .menu-sub li a {
    color: #74788d;
    font-size: 13px;
    padding: 0.625rem 1rem 0.625rem 2.75rem;
    letter-spacing: 0.005em;
}

/* Active text emphasis */
#side-menu .menu-sub li.active a {
    color: #495057 !important;
    letter-spacing: 0.01em;
}

/* ===== SPACING & LAYOUT - Perfect Balance ===== */

/* Menu item spacing */
#side-menu > li {
    margin: 0.25rem 0.75rem;
}

#side-menu .menu-sub li {
    margin: 0.125rem 0;
}

/* Border radius cho elegance */
#side-menu > li > a {
    border-radius: 8px;
}

/* ===== SUBTLE ENHANCEMENTS ===== */

/* Menu cha active - Subtle elevation */
#side-menu > li.mm-active > a {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.04);
}

/* Submenu active - Depth */
#side-menu .menu-sub li.active a {
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05);
}

/* Icon sizing & alignment */
#side-menu > li > a i {
    font-size: 1.125rem;
    width: 1.25rem;
    text-align: center;
    transition: all 0.25s ease;
}

/* Perfect flexbox alignment */
#side-menu > li > a {
    display: flex;
    align-items: center;
    gap: 0.875rem;
}

#side-menu > li > a span {
    flex: 1;
}

/* ===== SUBMENU ANIMATION - Elegant Entry ===== */

#side-menu .menu-sub {
    animation: elegantSlide 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes elegantSlide {
    from {
        opacity: 0;
        transform: translateX(-8px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ===== FOCUS STATE - Accessibility ===== */

#side-menu li a:focus {
    outline: 2px solid rgba(102, 126, 234, 0.4);
    outline-offset: 2px;
    border-radius: 6px;
}

#side-menu li a:focus-visible {
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

/* ===== HORIZONTAL MENU (Topbar) ===== */

/* Nav item active - Elegant bottom border */
.topnav .navbar-nav > li.nav-item.active > a,
.topnav .navbar-nav > li.nav-item:has(.dropdown-menu .active) > a {
    background-color: transparent !important;
    color: #556ee6 !important;
    font-weight: 500 !important;
    border-bottom: 2px solid #667eea;
    position: relative;
}

.topnav .navbar-nav > li.nav-item.active > a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: scaleX(0);
    }
    to {
        transform: scaleX(1);
    }
}

/* Dropdown item active */
.topnav .dropdown-menu .active,
.topnav .dropdown-menu .dropdown-item.active {
    background-color: rgba(85, 110, 230, 0.08) !important;
    color: #ffffff !important;
    font-weight: 500 !important;
    border-left: 3px solid #667eea;
    padding-left: calc(1rem - 3px);
}

/* Hover horizontal menu */
.topnav .navbar-nav > li > a:hover {
    background-color: rgba(85, 110, 230, 0.04) !important;
    color: #495057 !important;
    transition: all 0.2s ease;
}

.topnav .dropdown-menu .dropdown-item:hover {
    background-color: rgba(85, 110, 230, 0.06) !important;
    color: #495057 !important;
    transition: all 0.15s ease;
}

/* ===== DARK MODE SUPPORT ===== */

body[data-sidebar="dark"] #side-menu > li.mm-active > a {
    background-color: transparent !important;
    color: #a8b3ff !important;
}

body[data-sidebar="dark"] #side-menu > li.mm-active > a::before {
    background: linear-gradient(180deg, #a8b3ff 0%, #c4b5fd 100%);
    box-shadow: 0 0 10px rgba(168, 179, 255, 0.5);
}

body[data-sidebar="dark"] #side-menu > li.mm-active > a i {
    color: #a8b3ff !important;
    filter: drop-shadow(0 0 4px rgba(168, 179, 255, 0.4));
}

body[data-sidebar="dark"] #side-menu .menu-sub li.active a {
    background-color: rgba(168, 179, 255, 0.1) !important;
    color: #a8b3ff !important;
}

body[data-sidebar="dark"] #side-menu .menu-sub li.active a::before {
    background: linear-gradient(180deg, #a8b3ff 0%, #c4b5fd 100%);
}

body[data-sidebar="dark"] #side-menu .menu-sub li.active a::after {
    background: #a8b3ff;
    border-color: #1a1d2e;
}

/* ===== RESPONSIVE - MOBILE ===== */

@media (max-width: 768px) {
    #side-menu > li {
        margin: 0.25rem 0.5rem;
    }

    #side-menu li a {
        min-height: 44px;
    }

    #side-menu > li.mm-active > a::before {
        width: 4px;
    }
}

/* ===== HIGH CONTRAST MODE ===== */

@media (prefers-contrast: high) {
    #side-menu > li.mm-active > a::before {
        width: 4px;
        box-shadow: none;
    }

    #side-menu .menu-sub li.active a {
        border-left: 3px solid #556ee6;
    }
}

/* ===== PRINT STYLES ===== */

@media print {
    #side-menu > li.mm-active > a::before,
    #side-menu .menu-sub li.active a::before,
    #side-menu .menu-sub li.active a::after {
        display: none;
    }
}