/* Layout Structure */
/* Church Budget & Expense Management System */

/* Reset & Base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family-sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--text-primary);
    background-color: var(--bg-secondary);
}

/* Main Application Layout */
.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Sidebar Navigation - Desktop */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--bg-elevated);
    border-right: 1px solid var(--border-light);
    overflow-y: auto;
    transition: transform var(--transition-base);
    z-index: calc(var(--z-fixed) + 2);
}

.sidebar-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-light);
}

.sidebar-logo {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    text-decoration: none;
}

.sidebar-nav {
    padding: var(--space-md);
}

.sidebar-hidden {
    transform: translateX(-100%);
}

/* Main Content Area */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
    transition: margin-left var(--transition-base);
}

.main-content.sidebar-hidden {
    margin-left: 0;
}

/* Top Bar */
.topbar {
    height: var(--topbar-height);
    background-color: var(--bg-elevated);
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-lg);
    position: sticky;
    top: 0;
    z-index: calc(var(--z-fixed) + 1);
}

.topbar-left,
.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.topbar-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

/* Page Content */
.page-content {
    flex: 1;
    padding: var(--space-xl);
    max-width: var(--content-max-width);
    width: 100%;
    margin: 0 auto;
}

.page-header {
    margin-bottom: var(--space-xl);
}

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

.page-subtitle {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

/* Hamburger Menu Button */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--space-sm);
    cursor: pointer;
    color: var(--text-primary);
}

.menu-toggle:hover {
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

/* Grid System */
.grid {
    display: grid;
    gap: var(--space-md);
}

.grid-cols-1 { grid-template-columns: repeat(1, 1fr); }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* Flexbox Utilities */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* Responsive Breakpoints */

/* Tablet */
@media (max-width: 1024px) {
    .sidebar {
        width: var(--sidebar-width-collapsed);
    }
    
    .main-content {
        margin-left: var(--sidebar-width-collapsed);
    }
    
    .page-content {
        padding: var(--space-lg);
    }
    
    .grid-cols-4,
    .grid-cols-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Mobile */
@media (max-width: 768px) {
    .sidebar {
        width: 80vw;
        max-width: 20rem;
        transform: translateX(-100%);
    }

    .sidebar.sidebar-visible {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .menu-toggle {
        display: block;
    }

    .page-content {
        padding: var(--space-md);
    }
    
    .page-title {
        font-size: var(--font-size-2xl);
    }
    
    .grid-cols-4,
    .grid-cols-3,
    .grid-cols-2 {
        grid-template-columns: repeat(1, 1fr);
    }
    
    .topbar {
        padding: 0 var(--space-md);
    }
}

/* Overlay for mobile menu */
.sidebar-overlay {
    display: none;
}

@media (max-width: 768px) {
    .sidebar-overlay.visible {
        display: block;
        position: fixed;
        inset: 0;
        background-color: var(--bg-overlay);
        z-index: var(--z-fixed);
    }
}

/* Loading State */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    color: var(--text-secondary);
}