/* ==========================================================================
   GLOBAL SIDEBAR LAYOUT SYSTEM (Premium Matte Dark Theme)
   ========================================================================== */

:root {
    --sidebar-width-expanded: 260px;
    --sidebar-width-collapsed: 70px;
    --sidebar-width: var(--sidebar-width-expanded);
    --sidebar-bg: #0a0a0a;
    --sidebar-border: rgba(255, 255, 255, 0.06);
    --sidebar-hover: rgba(255, 255, 255, 0.04);
    --sidebar-active-bg: rgba(59, 130, 246, 0.08);
    --sidebar-active-border: #3b82f6;
    --sidebar-text: #f8fafc;
    --sidebar-text-muted: #64748b;
    --sidebar-transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1), transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Body Alignment & Flash prevention */
.no-transition,
.no-transition *,
.global-sidebar.no-transition {
    transition: none !important;
}

body {
    padding-left: var(--sidebar-width);
    transition: padding-left 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body.sidebar-collapsed {
    --sidebar-width: var(--sidebar-width-collapsed);
}

/* Header Alignment Shift */
.main-header {
    left: var(--sidebar-width) !important;
    width: calc(100% - var(--sidebar-width)) !important;
    transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1), width 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
}

/* --- SIDEBAR CONTAINER --- */
.global-sidebar {
    position: fixed;
    top: var(--trial-bar-height, 0px);
    left: 0;
    bottom: 0;
    width: var(--sidebar-width);
    height: calc(100vh - var(--trial-bar-height, 0px));
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    z-index: 1000;
    transition: var(--sidebar-transition), top 0.3s ease, height 0.3s ease;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    user-select: none;
    box-shadow: 2px 0 12px rgba(0, 0, 0, 0.25);
}

/* --- HEADER AREA --- */
.sidebar-header {
    height: 70px;
    padding: 0 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--sidebar-border);
    flex-shrink: 0;
    gap: 0.5rem;
}

.sidebar-header-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--sidebar-text);
    margin-right: auto;
    letter-spacing: -0.2px;
    transition: opacity 0.2s ease;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    overflow: hidden;
    white-space: nowrap;
    text-decoration: none;
}

.sidebar-logo {
    width: 32px;
    height: auto;
    flex-shrink: 0;
}

.sidebar-brand-text {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    line-height: 1.2;
    transition: opacity 0.2s ease;
}

.sidebar-brand-subtext {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--sidebar-text-muted);
}

/* Hamburger Toggle Button */
.sidebar-toggle-btn {
    background: transparent;
    border: none;
    color: var(--sidebar-text-muted);
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s;
    flex-shrink: 0;
}

.sidebar-toggle-btn:hover {
    background-color: var(--sidebar-hover);
    color: var(--sidebar-text);
}

/* --- NAVIGATION MENU --- */
.sidebar-menu {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Custom scrollbar for sidebar */
.sidebar-menu::-webkit-scrollbar {
    width: 4px;
}
.sidebar-menu::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 2px;
}

.sidebar-section {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sidebar-section-title {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--sidebar-text-muted);
    padding: 0 0.75rem 0.5rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: opacity 0.2s;
}

/* --- SIDEBAR MENU ITEM --- */
.sidebar-item {
    display: flex;
    align-items: center;
    padding: 0.75rem 0.85rem;
    border-radius: 10px;
    color: var(--sidebar-text-muted);
    font-size: 0.88rem;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s ease;
    gap: 0.85rem;
    border: 1px solid transparent;
    white-space: nowrap;
    position: relative;
}

.sidebar-item i {
    font-size: 1.1rem;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
    color: var(--sidebar-text-muted);
    transition: color 0.2s ease;
}

.sidebar-item-label {
    transition: opacity 0.2s ease;
}

.sidebar-item:hover {
    background-color: var(--sidebar-hover);
    color: var(--sidebar-text);
}

.sidebar-item:hover i {
    color: var(--sidebar-text);
}

/* Active State */
.sidebar-item.active {
    background-color: var(--sidebar-active-bg);
    color: var(--sidebar-text);
    border-color: rgba(59, 130, 246, 0.15);
}

.sidebar-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 20%;
    height: 60%;
    width: 3px;
    background: linear-gradient(180deg, var(--primary-light) 0%, var(--accent-purple) 100%);
    border-radius: 0 4px 4px 0;
}

.sidebar-item.active i {
    color: var(--sidebar-active-border);
}

/* --- FOOTER AREA --- */
.sidebar-footer {
    padding: 0.75rem;
    border-top: 1px solid var(--sidebar-border);
    flex-shrink: 0;
}

.sidebar-item.logout-item {
    color: #ef4444;
}

.sidebar-item.logout-item i {
    color: #ef4444;
}

.sidebar-item.logout-item:hover {
    background-color: rgba(239, 68, 68, 0.08);
    color: #f87171;
}

.sidebar-item.logout-item:hover i {
    color: #f87171;
}

/* --- SIDEBAR SOCIALS AREA --- */
.sidebar-socials-container {
    padding: 1.25rem 0.75rem;
    border-top: 1px solid var(--sidebar-border);
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-socials-icons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0.75rem;
    width: 100%;
}

.sidebar-social-btn {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--sidebar-border);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--sidebar-text-muted);
    font-size: 1.1rem;
    text-decoration: none;
    transition: all 0.2s ease;
}

.sidebar-social-btn:hover {
    background-color: rgba(59, 130, 246, 0.08);
    border-color: rgba(59, 130, 246, 0.3);
    color: #3b82f6;
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.15);
}

/* ==========================================================================
   COLLAPSED SIDEBAR OVERRIDES (Desktop)
   ========================================================================== */

body.sidebar-collapsed .global-sidebar {
    width: var(--sidebar-width-collapsed);
}

body.sidebar-collapsed .sidebar-brand-text,
body.sidebar-collapsed .sidebar-header-title,
body.sidebar-collapsed .sidebar-section-title,
body.sidebar-collapsed .sidebar-item-label {
    opacity: 0;
    pointer-events: none;
    display: none;
}

body.sidebar-collapsed .sidebar-header {
    justify-content: center;
    padding: 0;
}

body.sidebar-collapsed .sidebar-brand {
    justify-content: center;
}

body.sidebar-collapsed .sidebar-toggle-btn {
    display: none; /* Hide header toggle in collapsed mode, collapse via brand hover or similar. 
                      Actually, let's keep a floating toggle or let the brand handle it. 
                      Wait, if we hide the toggle button, how does the user expand it?
                      We should show the hamburger toggle inside the collapsed state! 
                      Let's design it so the hamburger remains visible, or we show it centered. */
}

body.sidebar-collapsed .sidebar-header {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Show only hamburger centered when collapsed */
body.sidebar-collapsed .sidebar-header .sidebar-brand {
    display: none;
}

body.sidebar-collapsed .sidebar-header .sidebar-toggle-btn {
    display: flex;
}

body.sidebar-collapsed .sidebar-item {
    justify-content: center;
    padding: 0.75rem;
}

body.sidebar-collapsed .sidebar-item i {
    margin: 0;
}

body.sidebar-collapsed .sidebar-menu {
    padding: 1.25rem 0.5rem;
}

body.sidebar-collapsed .sidebar-socials-container {
    display: none !important;
}

/* Hide mobile toggle on desktop */
.mobile-sidebar-toggle-btn {
    display: none;
}


/* ==========================================================================
   RESPONSIVE DESIGN (Mobile Overlay Mode)
   ========================================================================== */

@media (max-width: 768px) {
    /* No body shift on mobile */
    body {
        padding-left: 0 !important;
    }

    .main-header {
        left: 0 !important;
        width: 100% !important;
    }

    /* Mobile toggle button */
    .mobile-sidebar-toggle-btn {
        background: transparent;
        border: none;
        color: var(--text-main);
        font-size: 1.25rem;
        width: 40px;
        height: 40px;
        display: flex !important;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        margin-right: 0.5rem;
        border-radius: 8px;
    }

    .mobile-sidebar-toggle-btn:hover {
        background-color: rgba(255, 255, 255, 0.05);
    }

    /* Lock scroll on mobile when menu is active */
    body.sidebar-open {
        overflow: hidden !important;
        position: relative;
        height: 100dvh !important;
    }

    /* Sidebar offscreen slide-in */
    .global-sidebar {
        width: var(--sidebar-width-expanded) !important;
        transform: translateX(-100%);
        box-shadow: 15px 0 30px rgba(0, 0, 0, 0.6);
        z-index: 10001; /* Above mobile main-header */
        top: 0 !important;
        height: 100dvh !important; /* Premium dynamic viewport height on mobile */
    }

    .global-sidebar.open {
        transform: translateX(0);
    }

    /* Force show brand, title and labels on mobile */
    .global-sidebar .sidebar-brand-text,
    .global-sidebar .sidebar-header-title,
    .global-sidebar .sidebar-section-title,
    .global-sidebar .sidebar-item-label {
        display: flex !important;
        opacity: 1 !important;
        pointer-events: auto !important;
    }

    .global-sidebar .sidebar-brand {
        display: flex !important;
    }

    .global-sidebar .sidebar-toggle-btn {
        display: flex !important;
    }

    .global-sidebar .sidebar-item {
        justify-content: flex-start !important;
        padding: 0.75rem 0.85rem !important;
    }

    /* Make socials compact on mobile to guarantee visibility */
    .global-sidebar .sidebar-socials-container {
        padding: 0.75rem 0.5rem !important;
        gap: 0.25rem !important;
    }

    .global-sidebar .sidebar-socials-icons {
        gap: 0.5rem !important;
    }

    .global-sidebar .sidebar-social-btn {
        width: 36px !important;
        height: 36px !important;
        font-size: 1rem !important;
        border-radius: 8px !important;
    }

    /* Sidebar overlay backdrop */
    .sidebar-backdrop {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.6);
        backdrop-filter: blur(4px);
        z-index: 10000;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .sidebar-backdrop.active {
        opacity: 1;
        visibility: visible;
    }
}