/* ============================================
   PaisPro - Responsive Layout System
   Sidebar, Header, and Main Content
   ============================================ */

/* ============================================
   SIDEBAR NAVIGATION
   ============================================ */
.sidebar {
    position: fixed;
    top: 0;
    inset-inline-start: 0;
    height: 100vh;
    width: 250px;
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-3);
    overflow-y: auto;
    transition: all var(--transition-base);
    z-index: var(--z-fixed);
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-4);
    padding-bottom: var(--spacing-3);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.sidebar .logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: white;
}

.sidebar .logo i {
    font-size: var(--font-size-2xl);
}

.sidebar-toggle {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    width: 32px;
    height: 32px;
    border-radius: var(--radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.sidebar-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Sidebar Navigation Items */
.sidebar-nav {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-nav-item {
    margin-bottom: var(--spacing-1);
}

.sidebar-nav-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-3);
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    border-radius: var(--radius);
    transition: all var(--transition-fast);
    font-weight: var(--font-weight-medium);
}

.sidebar-nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.sidebar-nav-link.active {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    font-weight: var(--font-weight-semibold);
}

.sidebar-nav-link i {
    font-size: var(--font-size-lg);
    width: 20px;
    text-align: center;
}

/* Collapsed Sidebar State */
.sidebar.collapsed {
    width: 80px;
}

.sidebar.collapsed .logo-text,
.sidebar.collapsed .sidebar-nav-link span {
    opacity: 0;
    display: none;
}

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

.sidebar.collapsed .sidebar-toggle {
    transform: rotate(180deg);
}

.sidebar.collapsed .sidebar-nav-link {
    justify-content: center;
    padding: var(--spacing-2);
}

/* ============================================
   MAIN CONTENT AREA
   ============================================ */
.main-content {
    margin-inline-start: 250px;
    min-height: 100vh;
    background-color: var(--bg-secondary);
    transition: margin-inline-start var(--transition-base);
}

/* ============================================
   PAGE TRANSITION SYSTEM
   Smooth cross-fade between pages with subtle
   vertical shift for a polished native feel.
   ============================================ */
.main-content > * {
    animation: pageEnter 0.34s cubic-bezier(0.22, 1, 0.36, 1) both;
}

/* Stagger direct children for a cascading reveal */
.main-content > *:nth-child(1) { animation-delay: 0ms; }
.main-content > *:nth-child(2) { animation-delay: 35ms; }
.main-content > *:nth-child(3) { animation-delay: 65ms; }
.main-content > *:nth-child(4) { animation-delay: 90ms; }
.main-content > *:nth-child(5) { animation-delay: 110ms; }
.main-content > *:nth-child(6) { animation-delay: 125ms; }
.main-content > *:nth-child(7) { animation-delay: 138ms; }
.main-content > *:nth-child(8) { animation-delay: 148ms; }
.main-content > *:nth-child(n+9) { animation-delay: 155ms; }

@keyframes pageEnter {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Exit state — applied right before content swap */
.main-content.page-exiting {
    pointer-events: none;
}

.main-content.page-exiting > * {
    animation: pageExit 0.18s cubic-bezier(0.55, 0, 1, 0.45) both !important;
}

@keyframes pageExit {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(-6px);
    }
}

.main-content.sidebar-collapsed {
    margin-inline-start: 80px;
}

/* Page Header */
.page-header {
    background-color: var(--bg-primary);
    padding: var(--spacing-4);
    box-shadow: var(--shadow);
    margin-bottom: var(--spacing-4);
    position: relative;
    z-index: 20;
}

.page-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin: 0;
}

.page-subtitle {
    color: var(--text-secondary);
    margin-top: var(--spacing-1);
}

/* Content Container */
.content-container {
    padding: var(--spacing-4);
}

/* ============================================
   TOP HEADER (Alternative Layout)
   ============================================ */
.top-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-4);
    box-shadow: var(--shadow-md);
    z-index: var(--z-sticky);
}

.top-header .logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: white;
}

.top-header-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    list-style: none;
    margin: 0;
    padding: 0;
}

.top-header-nav-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius);
    transition: all var(--transition-fast);
    font-weight: var(--font-weight-medium);
}

.top-header-nav-link:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.top-header-nav-link.active {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

/* Main content with top header */
.main-content-with-header {
    padding-top: 80px;
    min-height: 100vh;
}

/* ============================================
   MOBILE NAVIGATION OVERLAY
   ============================================ */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    bottom: var(--spacing-4);
    right: var(--spacing-4);
    width: 56px;
    height: 56px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-xl);
    cursor: pointer;
    z-index: var(--z-fixed);
    font-size: var(--font-size-xl);
}

.mobile-menu-toggle:active {
    transform: scale(0.95);
}

/* Mobile Sidebar Overlay */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: calc(var(--z-fixed) - 1);
}

.sidebar-overlay.active {
    display: block;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Tablet (768px and below) */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(100%);
        box-shadow: -4px 0 20px rgba(0, 0, 0, 0.2);
    }

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

    .main-content {
        margin-inline-start: 0;
    }

    .main-content.sidebar-collapsed {
        margin-inline-start: 0;
    }

    .mobile-menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .page-header {
        padding: var(--spacing-3);
    }

    .page-title {
        font-size: var(--font-size-2xl);
    }

    .content-container {
        padding: var(--spacing-3);
    }

    /* Top Header Mobile */
    .top-header {
        padding: 0 var(--spacing-3);
    }

    .top-header-nav {
        display: none;
    }

    .top-header-mobile-menu {
        display: flex;
        align-items: center;
        gap: var(--spacing-2);
    }
}

/* Mobile (480px and below) */
@media (max-width: 480px) {
    .sidebar {
        width: 80%;
        max-width: 300px;
    }

    .mobile-menu-toggle {
        bottom: var(--spacing-3);
        right: var(--spacing-3);
        width: 48px;
        height: 48px;
        font-size: var(--font-size-lg);
    }

    .page-header {
        padding: var(--spacing-2);
    }

    .page-title {
        font-size: var(--font-size-xl);
    }

    .content-container {
        padding: var(--spacing-2);
    }

    .top-header .logo {
        font-size: var(--font-size-lg);
    }
}

/* ============================================
   STAT CARDS GRID
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-4);
}

.stat-card {
    background-color: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4);
    box-shadow: var(--shadow);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-3);
}

.stat-card-title {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
}

.stat-card-icon.primary {
    background: rgba(10, 74, 203, 0.1);
    color: var(--accent-primary);
}

.stat-card-icon.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.stat-card-icon.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.stat-card-icon.danger {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.stat-card-value {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-1);
}

.stat-card-change {
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
}

.stat-card-change.positive {
    color: var(--success);
}

.stat-card-change.negative {
    color: var(--danger);
}

/* ============================================
   DASHBOARD GRID
   ============================================ */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--spacing-4);
}

.grid-col-12 {
    grid-column: span 12;
}

.grid-col-8 {
    grid-column: span 8;
}

.grid-col-6 {
    grid-column: span 6;
}

.grid-col-4 {
    grid-column: span 4;
}

@media (max-width: 1024px) {
    .grid-col-8,
    .grid-col-6,
    .grid-col-4 {
        grid-column: span 12;
    }
}

/* ============================================
   USER MENU
   ============================================ */
.user-menu {
    position: relative;
}

.user-menu-trigger {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.user-menu-trigger:hover {
    background: rgba(255, 255, 255, 0.2);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: var(--bg-primary);
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: var(--font-weight-bold);
}

.user-menu-dropdown {
    position: absolute;
    top: calc(100% + var(--spacing-1));
    left: 0;
    background: var(--bg-primary);
    border-radius: var(--radius);
    box-shadow: var(--shadow-xl);
    min-width: 200px;
    padding: var(--spacing-2);
    display: none;
    z-index: var(--z-dropdown);
}

.user-menu-dropdown.active {
    display: block;
}

.user-menu-item {
    padding: var(--spacing-2);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--text-primary);
}

.user-menu-item:hover {
    background: var(--bg-secondary);
}

.user-menu-item i {
    width: 20px;
    text-align: center;
}