/* css/main.css - Base Styles and Variables */

:root {
    /* IMI Brand Colors */
    --imi-blue: #042847;
    --imi-yellow: #ffd502;
    --imi-dark-gray: #231f20;
    
    /* Secondary Colors */
    --white: #ffffff;
    --light-gray: #f5f5f5;
    --medium-gray: #e0e0e0;
    --text-gray: #666666;
    --text-muted: #666666;
    --bg-light: #fafafa;
    --imi-blue-light: rgba(4, 40, 71, 0.1);
    --success-green: #4caf50;
    --error-red: #f44336;
    --danger-red: #dc3545;
    --warning-orange: #ff9800;

    /* Badge Background Colors */
    --success-green-bg: #e8f5e9;
    --warning-orange-bg: #fff9c4;
    --error-red-bg: #ffebee;
    --info-blue-bg: #e0f2fe;
    --info-blue: #0ea5e9;
    
    /* Additional border radius */
    --radius-full: 50px;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* Border Radius (less rounded for professional look) */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-md: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-xxl: 32px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(4, 40, 71, 0.1);
    --shadow-md: 0 4px 8px rgba(4, 40, 71, 0.15);
    --shadow-lg: 0 8px 16px rgba(4, 40, 71, 0.2);

    /* Animations */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--light-gray);
    color: var(--imi-dark-gray);
    font-size: var(--font-size-base);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    /* Prevent FOUC - hide container until JavaScript initializes */
    opacity: 0;
    transition: opacity 0.15s ease-in;
}

/* Show container when JavaScript is ready */
body.js-ready .container {
    opacity: 1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    color: var(--imi-blue);
    font-weight: 600;
    line-height: 1.3;
}

h1 { font-size: var(--font-size-xxl); margin-bottom: var(--spacing-lg); }
h2 { font-size: var(--font-size-xl); margin-bottom: var(--spacing-md); }
h3 { font-size: var(--font-size-lg); margin-bottom: var(--spacing-md); }
h4 { font-size: var(--font-size-base); margin-bottom: var(--spacing-sm); }

p {
    margin-bottom: var(--spacing-md);
}

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

a:hover {
    color: var(--imi-yellow);
}

/* Utility Classes */
.text-muted {
    color: var(--text-gray);
}

.text-small,
.small {
    font-size: var(--font-size-sm);
}

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

.text-right {
    text-align: right;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

/* Page Sections */
.page-section {
    display: none;
    animation: fadeIn 0.3s ease;
}

.page-section.active {
    display: block;
}

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

/* Cards */
.card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-md);
}

/* Remove margin from last card in containers to prevent extra spacing */
.sidebar > .card:last-child,
.main-content > .card:last-child,
.dashboard-grid > div > .card:last-child {
    margin-bottom: 0;
}

/* Section Headers */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--medium-gray);
}

.section-title {
    color: var(--imi-blue);
    font-size: var(--font-size-lg);
    font-weight: 700;
    margin: 0;
    line-height: 1.2;
}

.section-header .text-muted {
    line-height: 1.2;
}

/* Widget bottom links have more top margin */
.widget-bottom-link {
    display: block;
    margin-top: var(--spacing-lg) !important;
}

/* Feedback card title needs extra margin */
.feedback-card .section-title {
    margin-bottom: var(--spacing-lg);
}

/* Line Chart Styles */
/* XP Chart - Simple HTML/CSS approach */
.simple-chart {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    font-family: var(--font-primary);
}

.chart-grid {
    display: flex;
    align-items: stretch;
    height: 300px;
    position: relative;
    background-color: var(--color-card-bg);
}

.y-axis-simple {
    width: 50px;
    position: relative;
    padding-right: 10px;
    flex-shrink: 0;
    background-color: var(--color-background);
}

.y-tick {
    position: absolute;
    right: 12px;
    font-size: 12px;
    color: var(--color-text-secondary);
    transform: translateY(50%);
    white-space: nowrap;
}

.plot-simple {
    flex: 1;
    position: relative;
    background-color: var(--color-card-bg);
    border-left: 2px solid var(--medium-gray);
}

.tier-line-simple {
    position: absolute;
    left: 0;
    right: 0;
    height: 0;
    border-top: 2px dashed;
    opacity: 0.7;
}

.tier-label-simple {
    position: absolute;
    right: 8px;
    top: -20px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
    background: var(--color-card-bg);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--imi-blue);
}

.data-line-container {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.data-point {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--imi-blue);
    border-radius: 50%;
    transform: translate(-50%, 50%);
    z-index: 3;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.connecting-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
}

.x-axis-simple {
    display: flex;
    margin-top: 0px;
    margin-left: 52px;
    border-top: 2px solid var(--medium-gray);
    padding-left: 2px;
}

.x-tick {
    flex: 1;
    font-size: 12px;
    color: var(--color-text-secondary);
    text-align: center;
    transform: rotate(-45deg);
    transform-origin: center;
    white-space: nowrap;
    margin-top: 20px;
}

/* Grids */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: var(--spacing-lg);
}

.main-content {
    display: flex;
    flex-direction: column;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 0; /* Remove gap to avoid double spacing with card margins */
}

/* Loading State */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--medium-gray);
    border-top-color: var(--imi-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Page Container and Dynamic Loading Styles */
.page-container {
    flex: 1;
    min-height: calc(100vh - 80px);
    position: relative;
}

.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    gap: var(--spacing-md);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--medium-gray);
    border-top-color: var(--imi-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-state p {
    color: var(--text-muted);
    font-size: var(--font-size-md);
    margin: 0;
}

/* Page section styles for dynamically loaded content */
.page-section {
    display: none;
    animation: fadeIn var(--transition-normal);
}

.page-section.active {
    display: block;
}

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

/* Error state */
.error-content {
    text-align: center;
    padding: var(--spacing-xxl);
    color: var(--text-muted);
}

.error-content h3 {
    color: var(--error-red);
    margin-bottom: var(--spacing-md);
}

.error-content p {
    margin-bottom: var(--spacing-lg);
}

/* Responsive adjustments for page container */
@media (max-width: 768px) {
    .page-container {
        min-height: calc(100vh - 60px);
    }

    .loading-state {
        min-height: 300px;
    }
}

/* ============================================================================
   Loading Overlay (Microsoft mode data fetching)
   ============================================================================ */

.student-loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.98);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.student-loading-content {
    text-align: center;
}

.student-loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--medium-gray);
    border-top-color: var(--imi-blue);
    border-radius: 50%;
    animation: student-spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

@keyframes student-spin {
    to {
        transform: rotate(360deg);
    }
}

.student-loading-text {
    font-size: var(--font-size-lg);
    color: var(--imi-dark-gray);
    margin: 0 0 var(--spacing-sm);
    font-weight: 500;
}

.student-loading-countdown {
    font-size: var(--font-size-sm);
    color: var(--text-gray);
    margin: 0;
}

.student-loading-countdown span {
    font-weight: 600;
    color: var(--imi-blue);
}

.student-loading-error {
    max-width: 400px;
    text-align: center;
}

.student-loading-error-title {
    font-size: var(--font-size-lg);
    color: var(--imi-dark-gray);
    font-weight: 600;
    margin: 0 0 var(--spacing-sm);
}

.student-loading-error-message {
    font-size: var(--font-size-sm);
    color: var(--text-gray);
    margin: 0 0 var(--spacing-sm);
    line-height: 1.5;
}

.student-loading-error-suggestion {
    font-size: var(--font-size-sm);
    color: var(--text-gray);
    margin: 0 0 var(--spacing-md);
}

.student-loading-error-suggestion a {
    color: var(--imi-blue);
    text-decoration: underline;
}

.student-loading-retry {
    margin-top: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
}

/* ============================================================================
   Sidebar Teams Chat Card (shared component)
   ============================================================================ */

.sidebar-teams-card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border-top: 3px solid var(--imi-blue);
}

.sidebar-teams-card-description {
    color: var(--text-gray);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
}

.sidebar-teams-card .btn i {
    margin-right: var(--spacing-xs);
}