/* static/css/theme.css */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Space+Grotesk:wght@500;600;700&display=swap');

:root {
    /* 1. Finalized Brand Tokens (prismera-design-system.md) */
    --color-canvas: #FFFFFF;
    --color-ink: #1A1D20;
    --color-accent-edu: #0F766E; /* Insight Teal */
    --color-success: #10B981;    /* Success Mint */
    --color-warning: #F59E0B;    /* Amber Warning */
    --color-critical: #EF4444;   /* Crimson Critical */
    --color-border: #E5E7EB;     /* Low-contrast border separator */
    --color-surface: #F9FAFB;    /* Tonal layer background */

    /* 2. Theme Component Mapping */
    --primary-color: var(--color-accent-edu);
    --primary-hover-color: #0B5C56; /* Mathematically darkened Teal */
    --background-color: var(--color-canvas);
    --sidebar-bg: var(--color-canvas);
    --card-bg: var(--color-canvas);
    --text-primary: var(--color-ink);
    --text-secondary: #5C626A; /* Soft ink/grey */
    --border-color: var(--color-border);
    --sidebar-width: 260px;
    --sidebar-collapsed-width: 80px;
    --header-height: 70px;
    
    /* 3. Typography Spec */
    --font-primary: 'Inter', 'Satoshi', system-ui, sans-serif;
    --font-display: 'Space Grotesk', 'Inter', sans-serif;
    
    /* 4. Spacing (8pt Grid) */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;

    /* 5. Border Radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-full: 9999px;
    --border-radius: var(--radius-md);

    /* 6. Motion Standards */
    --motion-micro: 100ms ease-out;
    --motion-standard: 200ms ease-out;
    --motion-complex: 300ms ease-out;
}

/* ====================================================
    Base & Typography Override
==================================================== */
body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    background-color: var(--color-canvas);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6, .page-title, .sidebar-text {
    font-family: var(--font-display);
    color: var(--text-primary);
    font-weight: 600;
    letter-spacing: -0.01em;
}

.wrapper {
    display: flex;
    width: 100%;
    align-items: flex-start;
    min-height: 100vh;
}

.material-symbols-outlined, [data-lucide] {
    font-size: 20px;
    width: 20px;
    height: 20px;
    vertical-align: middle;
    line-height: 1;
    user-select: none;
    flex-shrink: 0;
}

/* ====================================================
    Sidebar (Utilitarian & Minimal)
==================================================== */
#sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    min-width: var(--sidebar-width);
    max-width: var(--sidebar-width);
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    transition: all var(--motion-standard);
    display: flex;
    flex-direction: column;
    z-index: 100;
}

#sidebar.collapsed {
    min-width: var(--sidebar-collapsed-width);
    max-width: var(--sidebar-collapsed-width);
}

#sidebar .sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    height: var(--header-height);
}

.sidebar-logo-container {
    display: flex;
    align-items: center;
    color: var(--text-primary);
    text-decoration: none !important;
    overflow: hidden;
}

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

.sidebar-text {
    font-size: 1.2rem;
    font-weight: 700;
    white-space: nowrap;
    margin-left: var(--space-sm);
    color: var(--text-primary);
}

/* Toggle buttons */
.btn-ghost {
    background-color: transparent;
    border: none;
    color: var(--text-secondary);
    padding: var(--space-xs);
    border-radius: var(--radius-sm);
    transition: all var(--motion-micro);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-ghost:hover {
    background-color: var(--color-surface);
    color: var(--text-primary);
}

#sidebarToggleBtn .icon-expand { display: none; }
#sidebarToggleBtn .icon-collapse { display: block; }

#sidebar.collapsed #sidebarToggleBtn .icon-expand { display: block; }
#sidebar.collapsed #sidebarToggleBtn .icon-collapse { display: none; }

#sidebar.collapsed .sidebar-header {
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-xs);
}

#sidebar.collapsed .sidebar-text {
    display: none;
}

#sidebar.collapsed #sidebarToggleBtn {
    margin-top: var(--space-xs);
}

#sidebar .sidebar-nav {
    padding: var(--space-md) var(--space-sm);
    flex-grow: 1;
    overflow-y: auto;
}

#sidebar ul {
    padding-left: 0;
    list-style: none;
    margin-bottom: 0;
}

#sidebar ul li a {
    padding: 10px 14px;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--motion-micro);
    margin-bottom: var(--space-xs);
}

#sidebar.collapsed ul li a {
    justify-content: center;
    padding: 12px;
}

#sidebar.collapsed .link-text {
    display: none;
}

#sidebar ul li a .link-text {
    margin-left: 10px;
    white-space: nowrap;
}

#sidebar ul li a:hover {
    color: var(--text-primary);
    background: var(--color-surface);
}

#sidebar ul li.active > a {
    color: var(--color-canvas);
    background: var(--primary-color);
}

/* Sidebar Submenus */
.sidebar-nav .dropdown-toggle::after {
    margin-left: auto;
    transition: transform var(--motion-standard);
}
.sidebar-nav .dropdown-toggle[aria-expanded="true"]::after {
    transform: rotate(180deg);
}

.sidebar-nav ul.collapse {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    margin: 4px 0 8px 0;
    padding: 6px 0;
}

.sidebar-nav ul.collapse li a {
    padding: 8px 14px 8px 44px;
    font-size: 0.85rem;
}

#sidebar.collapsed ul.collapse {
    display: none !important; /* Never show dropdown submenus inline when collapsed */
}

.sidebar-nav.mt-auto {
    flex-shrink: 0;
}

/* ====================================================
    Main Layout & Viewport Architecture
==================================================== */
#content {
    width: 100%;
    padding: var(--space-xl) var(--space-2xl);
    min-height: 100vh;
    transition: all var(--motion-standard);
    background-color: var(--color-canvas);
}

.main-content-wrapper {
    max-width: 1280px;
    margin: 0 auto;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-color);
    height: var(--header-height);
}

.page-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.user-profile .dropdown-toggle::after {
    display: none;
}

.user-profile img {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
}

/* ====================================================
    Responsive Grid & Mobile Stack Rules
==================================================== */
@media (max-width: 768px) {
    #sidebar {
        position: fixed;
        left: -var(--sidebar-width);
        top: 0;
        height: 100vh;
        z-index: 1000;
        box-shadow: 0 8px 24px rgba(26, 29, 32, 0.08);
    }
    #sidebar.active {
        left: 0;
    }
    #content {
        padding: var(--space-md);
    }
    .page-header {
        margin-bottom: var(--space-lg);
        height: auto;
        padding-bottom: var(--space-sm);
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }
    .page-header > div:last-child {
        width: 100%;
        justify-content: space-between;
    }
    .page-title {
        font-size: 1.5rem;
    }
}