/* public/css/style.css */
:root {
    /* Map legacy variables to Design System Tokens */
    --bg-primary: var(--colour-surface-alt);
    --bg-surface: var(--colour-surface);
    --brand-primary: var(--colour-secondary); 
    --brand-accent: var(--colour-primary);
    --brand-accent-hover: var(--colour-primary-hover);
    
    --text-primary: var(--colour-text);
    --text-secondary: var(--colour-text-muted);
    
    --border-subtle: var(--colour-border);
    
    /* Animation & Transitions mapped to tokens */
    --transition-fast: var(--transition-fast);
    --transition-smooth: var(--transition-normal);
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-blur: blur(12px);
    --glass-shadow: var(--shadow-sm);

    --font-heading: var(--font-family-sans);
    --font-body: var(--font-family-sans);
}

[data-theme="dark"], html.dark {
    --glass-bg: rgba(15, 23, 42, 0.7);
    --glass-border: rgba(255,255,255,0.05);
}

/* Global Base Styles & Accessibility */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

*:focus-visible {
    outline: 2px solid var(--brand-accent);
    outline-offset: 2px;
    transition: outline-offset 0.1s ease;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    scroll-behavior: smooth;
    transition: background-color var(--transition-smooth);
    padding-top: 60px; /* Offset for fixed header */
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

/* Glassmorphism Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    transition: all var(--transition-smooth);
}

.nav-container {
    width: 100%;
    max-width: none;
    margin: 0 auto;
    padding: 0.5rem 4%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.brand h1 {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin: 0;
}

.nav-links {
    flex: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-left: 3rem;
    gap: 2rem;
}

.nav-menu-group {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-utils-group {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.nav-links a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-secondary);
    padding: 0.5rem 0.2rem;
    border-bottom: 2px solid transparent;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--brand-primary);
}

.nav-links a.active {
    border-bottom: 2px solid var(--brand-primary);
}

/* Nav Scrolled State */
.navbar.nav-scrolled {
    padding: 0.3rem 0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    background: rgba(255,255,255,0.9);
}
[data-theme="dark"] .navbar.nav-scrolled {
    background: rgba(15,23,42,0.9);
}

/* Dropdown Navigation */
.nav-dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: flex;
    flex-direction: column;
    opacity: 0;
    visibility: hidden;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-surface);
    min-width: 220px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    border-radius: 12px;
    padding: 0.5rem;
    z-index: 1001;
    border: 1px solid var(--border-subtle);
    transform: translateY(10px);
    transition: all var(--transition-fast);
}

.nav-dropdown:hover .dropdown-content,
.nav-dropdown:focus-within .dropdown-content {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-content a {
    padding: 0.75rem 1rem !important;
    border-bottom: none !important;
    border-radius: 8px;
}

.dropdown-content a:hover {
    background: rgba(2, 132, 199, 0.05);
}

/* Buttons */
.btn-primary, .btn-secondary {
    padding: 0 var(--space-4);
    border-radius: var(--border-radius-md);
    font-weight: 500;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    height: 40px;
    cursor: pointer;
    transition: transform var(--transition-fast), background var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-primary {
    background: var(--colour-primary);
    color: white !important;
    border: none;
}

.btn-primary:hover {
    background: var(--colour-primary-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: var(--colour-secondary) !important;
    border: 1px solid var(--colour-secondary);
}

.btn-secondary:hover {
    background: var(--colour-secondary);
    color: white !important;
    transform: translateY(-1px);
}

/* Sections & Layout Utilities */
.section {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.grid-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 280px), 1fr));
    gap: 2rem;
    width: 100%;
}

.card {
    background: var(--colour-surface);
    border: 1px solid var(--colour-border);
    box-shadow: var(--shadow-sm);
    padding: var(--space-4);
    border-radius: var(--border-radius-lg);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Peer Review & CGL Specifics */
.calibration-zone {
    border-left: 4px solid var(--brand-accent);
    padding-left: 15px;
    margin-bottom: 30px;
}
.rubric-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 15px;
}
.rubric-table th, .rubric-table td {
    padding: 10px;
    border: 1px solid var(--border-subtle);
    text-align: left;
}
#peer-assignment {
    display: none;
}

/* Labs Sandbox Specifics */
.lab-container {
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    gap: 4rem;
}

.lab-module {
    background: var(--glass-bg);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    box-shadow: var(--glass-shadow);
    padding: 2.5rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

@media (max-width: 800px) {
    .lab-module { grid-template-columns: 1fr; }
}

.lab-content h2 { margin-bottom: 1rem; font-size: 2rem; }
.lab-content p { color: var(--text-secondary); line-height: 1.6; margin-bottom: 2rem; }

.lab-visual {
    background: var(--bg-surface);
    border: 1px solid var(--border-subtle);
    border-radius: 12px;
    padding: 2rem;
    position: relative;
    box-shadow: inset 0 2px 10px rgba(0,0,0,0.05); /* Lighter shadow for clean aesthetic */
}

/* Specific Adaptive Tutor Styles */
.tutor-stats { display: flex; justify-content: space-between; margin-bottom: 1.5rem; font-size: 0.9rem; color: var(--text-secondary); }
.tutor-stats span { font-family: monospace; color: var(--brand-primary); font-weight: bold; font-size: 1.1rem; }
.tutor-graph { height: 150px; display: flex; align-items: flex-end; gap: 4px; margin-bottom: 2rem; position: relative; border-bottom: 1px solid var(--border-subtle); }
.tutor-bar { flex: 1; background: var(--brand-accent); border-radius: 4px 4px 0 0; transition: height 0.3s ease, background 0.3s ease; min-height: 5px; }

/* Specific Error Analysis Styles */
.error-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.error-card { background: var(--glass-bg); border: 1px solid var(--border-subtle); padding: 1rem; border-radius: 8px; text-align: center; }
.error-card.alert { border-color: #ef4444; background: rgba(239, 68, 68, 0.1); }

/* Hero Section Specifics */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    padding-top: 4rem; /* Offset for fixed nav */
}

.hero-content {
    animation: fadeUp 0.8s ease-out forwards;
    opacity: 0;
    transform: translateY(20px);
}

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

.hero-pill {
    display: inline-block;
    background: var(--border-subtle);
    padding: 0.4rem 1.2rem;
    border-radius: 999px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    letter-spacing: 0.5px;
}

.hero h2 {
    font-size: clamp(3rem, 5vw, 4.5rem);
    margin-bottom: 1.5rem;
    line-height: 1.1;
    background: linear-gradient(to right, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Animations */
.bounce-hover {
    transition: transform var(--transition-fast);
}
.bounce-hover:hover {
    transform: scale(1.05);
}

/* Footer */
.footer {
    padding: 3rem 2rem;
    background: var(--bg-surface);
    border-top: 1px solid var(--border-subtle);
    text-align: center;
    color: var(--text-secondary);
    margin-top: 4rem;
}

/* Responsive Overrides & Mobile Utilities */
.grid-2-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

/* Hamburger Menu Toggle Button (Hidden on Desktop) */
.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
}

/* Allow marketing navbar on dashboard pages */
body.dashboard-page #main-nav {
    display: flex;
}

@media (max-width: 1024px) {
    /* Layout Overrides */
    .grid-2-col {
        grid-template-columns: 1fr !important;
    }
    
    .flex-col-mobile {
        flex-direction: column !important;
        align-items: stretch !important;
    }

    /* Navbar Hamburger Logic */
    .mobile-menu-btn {
        display: block !important;
    }
    
    .desktop-only-divider {
        display: none !important;
    }
    
    .nav-container {
        flex-wrap: wrap !important;
        padding: 1rem 1.5rem;
    }
    
    .nav-links {
        display: none !important; /* Force override any inline styles or specificity */
        flex-direction: column !important;
        align-items: flex-start !important;
        margin-left: 0 !important;
        width: 100% !important;
        flex: none !important;
        gap: 1.5rem;
        padding: 1.5rem 0;
        border-top: 1px solid var(--border-subtle);
        margin-top: 1rem;
    }

    .nav-menu-group {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
        gap: 1rem;
    }

    .nav-utils-group {
        flex-direction: row;
        align-items: center;
        width: 100%;
        gap: 1.5rem;
        flex-wrap: wrap;
        margin-top: 1rem;
    }

    .nav-links.active {
        display: flex !important;
        animation: fadeIn var(--transition-fast) forwards;
        max-height: calc(100vh - 70px);
        overflow-y: auto;
    }

    .dropdown-content {
        position: static;
        box-shadow: none;
        border: none;
        background: transparent;
        padding-left: 1.5rem;
        display: none;
        opacity: 1;
        visibility: visible;
        margin-top: 0.5rem;
        gap: 0.5rem;
    }
    .dropdown-item {
        padding: 0.5rem 0;
    }
    
    .nav-dropdown.active .dropdown-content {
        display: flex;
    }

    /* General Spacing Overrides */
    .hero { padding-top: 6rem; }
    .hero h2 { font-size: 2.25rem; }
    .section { padding: 3rem 1rem; }
    
    .page-wrapper {
        padding: 5rem 1rem 3rem 1rem;
    }
    .page-wrapper-narrow {
        padding: 5rem 1rem 3rem 1rem;
    }
}

/* CSS Mesh Gradient Background for Hero */
.mesh-gradient-bg {
    background-color: var(--bg-primary);
    background-image: 
        radial-gradient(at 0% 0%, hsla(253,16%,7%,0.05) 0, transparent 50%), 
        radial-gradient(at 50% 0%, hsla(225,39%,30%,0.05) 0, transparent 50%), 
        radial-gradient(at 100% 0%, hsla(339,49%,30%,0.05) 0, transparent 50%);
    background-repeat: no-repeat;
    position: relative;
}
[data-theme="dark"] .mesh-gradient-bg {
    background-image: 
        radial-gradient(at 0% 0%, hsla(253,16%,7%,1) 0, transparent 50%), 
        radial-gradient(at 50% 0%, hsla(225,39%,30%,0.3) 0, transparent 50%), 
        radial-gradient(at 100% 0%, hsla(339,49%,30%,0.3) 0, transparent 50%);
}

/* ========================================================================= */
/* STRUCTURAL PAGE GEOMETRY (Eliminate Navigation Jumping)                   */
/* ========================================================================= */
.page-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: 6rem 2rem 4rem 2rem; /* 6rem top padding ensures clearing of the fixed navbar */
    min-height: calc(100vh - 80px); /* 80px is approx footer height */
}

/* For narrower text-heavy pages */
.page-wrapper-narrow {
    max-width: 900px;
    margin: 0 auto;
    padding: 6rem 2rem 4rem 2rem;
    min-height: calc(100vh - 80px);
}

.page-header {
    margin-bottom: 3rem;
}
.page-header.text-center {
    text-align: center;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4rem) !important;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
    background: -webkit-linear-gradient(45deg, var(--text-primary), var(--brand-primary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
}

/* ========================================================================= */
/* UTILITY CLASSES (Typography, Layout, Spacing, Transitions)                */
/* ========================================================================= */

/* Transitions & Animations */
.page-fade-in { animation: fadeIn var(--transition-smooth) forwards; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* Typography */
.text-center { text-align: center !important; }
.text-left { text-align: left !important; }
.text-right { text-align: right !important; }
.text-muted { color: var(--text-secondary) !important; }
.text-accent { color: var(--brand-accent) !important; }
.text-primary { color: var(--brand-primary) !important; }
.font-bold { font-weight: 700 !important; }
.font-mono { font-family: monospace !important; }

/* Spacing (Margin & Padding via rem scaling) */
.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }
.mt-1 { margin-top: 0.5rem !important; }
.mb-1 { margin-bottom: 0.5rem !important; }
.mt-2 { margin-top: 1rem !important; }
.mb-2 { margin-bottom: 1rem !important; }
.mt-3 { margin-top: 1.5rem !important; }
.mb-3 { margin-bottom: 1.5rem !important; }
.mt-4 { margin-top: 2rem !important; }
.mb-4 { margin-bottom: 2rem !important; }

.p-2 { padding: 1rem !important; }
.p-3 { padding: 1.5rem !important; }
.p-4 { padding: 2rem !important; }
.pt-1 { padding-top: 0.5rem !important; }
.pb-1 { padding-bottom: 0.5rem !important; }
.pt-2 { padding-top: 1rem !important; }
.pb-2 { padding-bottom: 1rem !important; }

/* Flexbox Layouts */
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-center { display: flex; justify-content: center; align-items: center; }
.flex-start { display: flex; justify-content: flex-start; align-items: center; }
.flex-gap-1 { gap: 0.5rem; }
.flex-gap-2 { gap: 1rem; }
.wrap { flex-wrap: wrap; }

/* Reduced Motion Override */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ─── Global Custom Modals ────────────────────────── */
.la-modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

.la-modal-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.la-modal {
    background: var(--bg-primary);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    transform: translateY(20px) scale(0.95);
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.la-modal-overlay.visible .la-modal {
    transform: translateY(0) scale(1);
}

.la-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-subtle);
}

.la-modal-header h3 {
    margin: 0;
    font-size: 1.1rem;
    color: var(--text-primary);
}

.la-modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    line-height: 1;
    padding: 0;
}

.la-modal-close:hover {
    color: var(--text-primary);
}

.la-modal-body {
    padding: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

.la-modal-body p {
    margin: 0;
}

.la-modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    background: var(--bg-surface);
    border-bottom-left-radius: 8px;
    border-bottom-right-radius: 8px;
}

/* ─── Global Topbar Collapse Styles ────────────────────────── */
body.board-topbar-collapsed {
    padding-top: 0 !important;
}
#main-nav, .am-navbar {
    transition: transform 0.2s ease, opacity 0.2s ease, box-shadow 0.2s ease;
}
body.board-topbar-collapsed #main-nav, body.board-topbar-collapsed .am-navbar {
    opacity: 0;
    pointer-events: none;
    transform: translateY(-100%);
    display: none !important;
}
body.board-topbar-collapsed .dash-sidebar {
    top: 0 !important;
    height: 100vh !important;
}
body.board-topbar-collapsed .dash-shell {
    min-height: 100vh !important;
}