/* Floating Hamburger Button and Mobile Drawer Navigation */

/* ===== Floating Hamburger Button (styles largely unchanged) ===== */
#floating-hamburger {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    border: none;
    outline: none;
    cursor: pointer;
    z-index: 2000; /* Highest z-index */
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1), background-color 0.3s ease;
    display: none; /* Hidden by default, shown by JS on mobile */
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 0;
}

.light-theme #floating-hamburger {
    background-color: var(--light-accent);
}

.dark-theme #floating-hamburger {
    background-color: var(--dark-accent);
}

#floating-hamburger:hover {
    transform: scale(1.05);
}
/* ... (other :hover, :active, span animation styles for FAB are the same as before) ... */
.light-theme #floating-hamburger:hover { box-shadow: 0 6px 16px rgba(67, 97, 238, 0.4); }
.dark-theme #floating-hamburger:hover { box-shadow: 0 6px 16px rgba(99, 102, 241, 0.4); }
#floating-hamburger:active { transform: scale(0.95); }
#floating-hamburger span {
    display: block; width: 22px; height: 3px; background-color: white;
    border-radius: 2px; transition: transform 0.3s ease, opacity 0.3s ease; margin: 2px 0;
}
#floating-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
#floating-hamburger.open span:nth-child(2) { opacity: 0; transform: translateX(-10px); }
#floating-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }


/* ===== Mobile Backdrop (styles unchanged) ===== */
#mobile-backdrop {
    display: none; /* Managed by JS */
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4); /* Dimming effect */
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    z-index: 1800; /* Below drawer but above content */
    opacity: 0;
    transition: opacity 0.3s ease;
}

#mobile-backdrop.active {
    opacity: 1;
}

/* ===== NEW: Styles for the Separate Mobile Drawer (#mobile-drawer-menu) ===== */
.mobile-drawer { /* This targets #mobile-drawer-menu */
    position: fixed !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    top: auto !important;
    height: auto !important;
    max-height: 70vh !important; /* Can be adjusted */
    width: 100% !important;
    background-color: var(--light-card-bg) !important; /* Default, themed below */
    transform: translateY(100%) !important; /* Initially hidden below screen */
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94) !important;
    border-top-left-radius: 20px !important;
    border-top-right-radius: 20px !important;
    box-shadow: 0 -8px 30px rgba(0, 0, 0, 0.2) !important;
    z-index: 1900 !important; /* Between backdrop and FAB */
    overflow: hidden !important; /* Main drawer overflow hidden, inner nav scrolls */
    display: flex !important;
    flex-direction: column !important;
    visibility: hidden; /* Hidden until .open is added by JS */
}

.dark-theme .mobile-drawer {
    background-color: var(--dark-card-bg) !important;
}

.mobile-drawer.open { /* Class added by JS when FAB is clicked */
    transform: translateY(0) !important;
    visibility: visible !important;
}

/* Grab Handle for the new Drawer */
.mobile-drawer .drawer-grab-handle {
    display: block;
    width: 40px;
    height: 5px;
    border-radius: 2.5px;
    margin: 10px auto 5px; /* top, horizontal-auto, bottom */
    background-color: rgba(128, 128, 128, 0.3);
    flex-shrink: 0; /* Prevent shrinking if content is too much */
}
.dark-theme .mobile-drawer .drawer-grab-handle {
    background-color: rgba(200, 200, 200, 0.3);
}

/* Header inside the new Drawer */
.mobile-drawer .drawer-header {
    padding: 10px 20px !important;
    margin-bottom: 0 !important;
    border-bottom: 1px solid;
    text-align: center;
    flex-shrink: 0;
}
.light-theme .mobile-drawer .drawer-header {
    border-bottom-color: var(--light-border, #e0e0e0) !important;
}
.dark-theme .mobile-drawer .drawer-header {
    border-bottom-color: var(--dark-border, #334155) !important;
}

.mobile-drawer .drawer-title {
    font-size: 1.2rem !important;
    font-weight: 600 !important;
    margin: 0 !important;
}
.light-theme .mobile-drawer .drawer-title { color: var(--light-title); }
.dark-theme .mobile-drawer .drawer-title { color: var(--dark-title); }

/* Navigation list inside the new Drawer */
.mobile-drawer .drawer-nav {
    padding: 5px 15px 20px 15px !important; /* top, sides, bottom */
    overflow-y: auto !important;
    flex-grow: 1 !important; /* Takes remaining scrollable space */
    width: 100% !important;
}

.mobile-drawer .drawer-nav ul {
    padding: 0 !important;
    list-style: none !important;
    flex-direction: column !important; /* Should already be default for ul > li */
}

.mobile-drawer .drawer-nav .nav-link {
    display: flex !important;
    align-items: center !important;
    padding: 12px 15px !important;
    margin-bottom: 8px !important;
    border-radius: 8px !important;
    font-size: 1rem !important;
    font-weight: 500 !important;
    text-decoration: none;
    transition: background-color 0.2s ease, color 0.2s ease !important;
    opacity: 0; /* For staggered animation */
    transform: translateY(15px); /* For staggered animation */
    animation: drawerLinkFadeInSeparate 0.3s ease-out forwards; /* Unique name */
    animation-delay: calc(0.1s + var(--nav-index, 0) * 0.04s);
}

@keyframes drawerLinkFadeInSeparate {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.light-theme .mobile-drawer .drawer-nav .nav-link { color: var(--light-text); }
.dark-theme .mobile-drawer .drawer-nav .nav-link { color: var(--dark-text); }

.light-theme .mobile-drawer .drawer-nav .nav-link:hover {
    background-color: rgba(67, 97, 238, 0.1);
    color: var(--light-accent);
}
.dark-theme .mobile-drawer .drawer-nav .nav-link:hover {
    background-color: rgba(99, 102, 241, 0.15);
    color: var(--dark-accent);
}

/* Active state for links inside the new drawer */
.light-theme .mobile-drawer .drawer-nav .nav-link.active {
    background-color: var(--light-accent) !important;
    color: white !important;
}
.dark-theme .mobile-drawer .drawer-nav .nav-link.active {
    background-color: var(--dark-accent) !important;
    color: white !important;
}

.mobile-drawer .drawer-nav .nav-link i {
    margin-right: 15px !important;
    font-size: 1.2em !important;
    width: 24px !important;
    text-align: center !important;
}

/* Hide floating hamburger and the new drawer on desktop */
@media (min-width: 768px) {
    #floating-hamburger,
    #mobile-backdrop,
    .mobile-drawer { /* Targets #mobile-drawer-menu */
        display: none !important;
    }
}

/* Ensure the original TOP HEADER's hamburger (#mobile-toggle) is hidden on mobile,
   as the FAB is now the trigger. Your existing aside.sidebar will still function as the top bar. */
@media (max-width: 767px) {
    aside.sidebar .sidebar-header #mobile-toggle { /* If #mobile-toggle is inside original sidebar header */
        display: none !important;
    }
}