/* =========================================================================
   iView Learning - Corporate Design System
   Version: 2.0
   Last Updated: February 2026
   
   A comprehensive, accessible design system for enterprise learning
   ========================================================================= */

/* -------------------------------------------------------------------------
   DESIGN TOKENS - COLOR PALETTE
   Professional, accessible, WCAG 2.1 AA compliant
   ------------------------------------------------------------------------- */
:root {
    /* Brand Colors - Updated from User Palette */
    --brand-primary: #5057BE;        /* Purple - Primary brand color */
    --brand-secondary: #D76285;      /* Pink - Secondary brand color */
    --brand-tertiary: #F0B795;       /* Peach - Accent/Highlights */
    --brand-blue: #5057BE;           /* Blue - Buttons and links */
    
    /* Gradients */
    --gradient-brand: linear-gradient(135deg, #5057BE 0%, #7C3AED 50%, #D76285 100%);
    --gradient-subtle: linear-gradient(135deg, rgba(80, 87, 190, 0.1) 0%, rgba(215, 98, 133, 0.1) 100%);
    
    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.7);
    --glass-bg-dark: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px rgba(80, 87, 190, 0.15);
    
    /* Neutral Palette - Clean, professional grays */
    --neutral-900: #0E1015;          /* Almost Black - Headings */
    --neutral-800: #1E293B;          /* Slate 800 - Body text */
    --neutral-700: #50646A;          /* Dark Slate Gray - Secondary text */
    --neutral-600: #64748B;          /* Slate 600 - Muted text */
    --neutral-500: #9BA4BA;          /* Cool Gray - Placeholder */
    --neutral-400: #94A3B8;          /* Slate 400 - Disabled */
    --neutral-300: #CBD5E1;          /* Slate 300 - Borders */
    --neutral-200: #DDD7E1;          /* Light Lavender - Dividers */
    --neutral-100: #FBFBFB;          /* Off-White - Background light */
    --neutral-50: #FBFBFB;           /* Off-White - Background */
    
    /* Semantic Colors - Status and feedback */
    --success: #10B981;              /* Green - Completed */
    --warning: #F59E0B;              /* Amber - In progress */
    --error: #EF4444;                /* Red - Failed/Error */
    --info: #3B82F6;                 /* Blue - Information */
    
    /* Background Colors */
    --bg-primary: #FFFFFF;
    --bg-secondary: var(--neutral-50);
    --bg-tertiary: var(--neutral-100);
    --bg-overlay: rgba(14, 16, 21, 0.5);
    
    /* Text Colors */
    --text-primary: var(--neutral-900);
    --text-secondary: var(--neutral-700);
    --text-tertiary: var(--neutral-600);
    --text-disabled: var(--neutral-400);
    --text-inverse: #FFFFFF;
    
    /* Interactive States */
    --hover-overlay: rgba(99, 102, 241, 0.08);
    --active-overlay: rgba(99, 102, 241, 0.16);
    --focus-ring: var(--brand-tertiary);
    
    /* Shadows - Subtle depth */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-base: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* Spacing System - 8px base */
    --space-1: 0.25rem;   /* 4px */
    --space-2: 0.5rem;    /* 8px */
    --space-3: 0.75rem;   /* 12px */
    --space-4: 1rem;      /* 16px */
    --space-5: 1.25rem;   /* 20px */
    --space-6: 1.5rem;    /* 24px */
    --space-8: 2rem;      /* 32px */
    --space-10: 2.5rem;   /* 40px */
    --space-12: 3rem;     /* 48px */
    --space-16: 4rem;     /* 64px */
    
    /* Border Radius */
    --radius-sm: 0.25rem;  /* 4px */
    --radius-md: 0.5rem;   /* 8px */
    --radius-lg: 0.75rem;  /* 12px */
    --radius-xl: 1rem;     /* 16px */
    --radius-full: 9999px;
    
    /* Typography Scale */
    --font-size-xs: 0.75rem;    /* 12px */
    --font-size-sm: 0.875rem;   /* 14px */
    --font-size-base: 1rem;     /* 16px */
    --font-size-lg: 1.125rem;   /* 18px */
    --font-size-xl: 1.25rem;    /* 20px */
    --font-size-2xl: 1.5rem;    /* 24px */
    --font-size-3xl: 1.875rem;  /* 30px */
    --font-size-4xl: 2.25rem;   /* 36px */
    
    /* Line Heights */
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;
    
    /* Font Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* -------------------------------------------------------------------------
   HIGH CONTRAST MODE
   Enhanced for visual accessibility
   ------------------------------------------------------------------------- */
body.high-contrast {
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F5F5;
    --text-primary: #000000;
    --text-secondary: #1A1A1A;
    --brand-primary: #002A8F;
    --brand-tertiary: #4338CA;
    --neutral-300: #000000;
    --shadow-base: 0 0 0 2px rgba(0, 0, 0, 0.8);
}

body.high-contrast * {
    font-weight: var(--font-medium) !important;
}

body.high-contrast .card,
body.high-contrast .btn,
body.high-contrast .form-control {
    border: 2px solid var(--neutral-900) !important;
}

/* -------------------------------------------------------------------------
   DARK MODE
   Optional for users who prefer dark interfaces
   ------------------------------------------------------------------------- */
body.dark-mode {
    --bg-primary: #0F172A;
    --bg-secondary: #1E293B;
    --bg-tertiary: #334155;
    --text-primary: #F8FAFC;
    --text-secondary: #CBD5E1;
    --text-tertiary: #94A3B8;
    --neutral-300: #475569;
    --shadow-base: 0 1px 3px rgba(0, 0, 0, 0.3);
}

/* -------------------------------------------------------------------------
   TYPOGRAPHY FOUNDATION
   System fonts with dyslexia-friendly fallback
   ------------------------------------------------------------------------- */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, 
                 "Helvetica Neue", Arial, sans-serif, 
                 "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    font-size: var(--font-size-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background: linear-gradient(135deg, #F8FAFC 0%, #EEF2FF 100%);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Dyslexia-Friendly Font Option */
body.dyslexia-friendly {
    font-family: "Comic Sans MS", "OpenDyslexic", "Arial", sans-serif !important;
    letter-spacing: 0.05em !important;
    word-spacing: 0.16em !important;
    line-height: var(--leading-relaxed) !important;
}

body.dyslexia-friendly h1,
body.dyslexia-friendly h2,
body.dyslexia-friendly h3,
body.dyslexia-friendly h4,
body.dyslexia-friendly h5,
body.dyslexia-friendly h6 {
    font-weight: var(--font-bold) !important;
}

/* Larger Text Option */
body.larger-text {
    font-size: 1.125rem !important; /* 18px */
}

body.larger-text h1 { font-size: 2.75rem !important; }
body.larger-text h2 { font-size: 2.25rem !important; }
body.larger-text h3 { font-size: 1.875rem !important; }
body.larger-text h4 { font-size: 1.5rem !important; }
body.larger-text h5 { font-size: 1.25rem !important; }
body.larger-text h6 { font-size: 1.125rem !important; }

/* Heading Styles */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

/* Paragraph Styles */
p {
    margin-bottom: var(--space-4);
    color: var(--text-secondary);
}

/* -------------------------------------------------------------------------
   FOCUS & KEYBOARD NAVIGATION
   Enhanced visibility for keyboard users
   ------------------------------------------------------------------------- */
*:focus {
    outline: none;
}

/* Visible focus indicator for all interactive elements */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
    outline: 3px solid var(--focus-ring);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
}

/* Skip to main content link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--brand-primary);
    color: var(--text-inverse);
    padding: var(--space-2) var(--space-4);
    text-decoration: none;
    z-index: var(--z-tooltip);
    border-radius: var(--radius-md);
}

.skip-link:focus {
    top: var(--space-2);
    left: var(--space-2);
}

/* -------------------------------------------------------------------------
   BUTTON COMPONENTS
   Accessible, professional button styles
   ------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-base);
    font-weight: var(--font-semibold);
    line-height: 1;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Primary Button */
.btn-primary {
    background: var(--brand-blue);
    border: none;
    color: var(--text-inverse);
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.4);
}

.btn-primary:hover {
    background: #4338CA;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.5);
}

.btn-primary:active {
    transform: translateY(0);
}

/* Secondary Button */
.btn-secondary {
    background: var(--brand-secondary);
    color: var(--text-inverse);
    box-shadow: 0 4px 14px rgba(236, 38, 100, 0.4);
}

.btn-secondary:hover {
    background: #D61E56;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(236, 38, 100, 0.5);
}

/* Outline Button */
.btn-outline {
    background-color: transparent;
    color: var(--brand-primary);
    border: 2px solid var(--brand-primary);
}

.btn-outline:hover {
    background-color: var(--brand-primary);
    color: var(--text-inverse);
}

/* Ghost Button */
.btn-ghost {
    background-color: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background-color: var(--hover-overlay);
    color: var(--brand-tertiary);
}

/* Button Sizes */
.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--font-size-lg);
}

/* -------------------------------------------------------------------------
   FORM ELEMENTS
   Clean, accessible form controls
   ------------------------------------------------------------------------- */
.form-control {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-base);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    border: 2px solid var(--neutral-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.form-control:hover {
    border-color: var(--neutral-400);
}

.form-control:focus {
    border-color: var(--brand-tertiary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.form-control:disabled {
    background-color: var(--neutral-100);
    color: var(--text-disabled);
    cursor: not-allowed;
}

/* Form Labels */
.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-size: var(--font-size-sm);
    font-weight: var(--font-medium);
    color: var(--text-primary);
}

.form-label.required::after {
    content: " *";
    color: var(--error);
}

/* Form Helper Text */
.form-helper {
    margin-top: var(--space-1);
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

/* Form Error State */
.form-control.error {
    border-color: var(--error);
}

.form-error {
    margin-top: var(--space-1);
    font-size: var(--font-size-xs);
    color: var(--error);
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

/* -------------------------------------------------------------------------
   CARD COMPONENTS - GLASS MORPHISM
   Professional, consistent card layouts with frosted glass effect
   ------------------------------------------------------------------------- */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--glass-shadow);
    overflow: hidden;
    transition: all var(--transition-base);
}

.card:hover {
    background: rgba(255, 255, 255, 0.85);
    box-shadow: 0 12px 40px rgba(91, 79, 217, 0.2);
    transform: translateY(-4px);
    border-color: rgba(91, 79, 217, 0.3);
}

.card-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--neutral-200);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-bold);
    margin: 0;
}

.card-body {
    padding: var(--space-6);
}

.card-footer {
    padding: var(--space-6);
    border-top: 1px solid var(--neutral-200);
    background-color: var(--bg-secondary);
}

/* -------------------------------------------------------------------------
   NAVIGATION COMPONENTS
   ------------------------------------------------------------------------- */
.iq-sidebar-menu {
    background-color: var(--bg-primary) !important;
    box-shadow: var(--shadow-base);
}

.iq-sidebar-menu .iq-menu-title {
    color: var(--text-tertiary) !important;
    font-size: var(--font-size-xs) !important;
    font-weight: var(--font-semibold) !important;
    letter-spacing: 0.1em !important;
    text-transform: uppercase !important;
    padding: var(--space-4) var(--space-5) var(--space-2) !important;
    margin-top: var(--space-3) !important;
}

.iq-sidebar-menu .iq-menu li {
    margin: var(--space-1) var(--space-2) !important;
}

.iq-sidebar-menu .iq-menu li a {
    padding: var(--space-3) var(--space-4) !important;
    border-radius: var(--radius-lg) !important;
    color: var(--text-secondary) !important;
    font-size: var(--font-size-base) !important;
    font-weight: var(--font-normal) !important;
    transition: all var(--transition-base) !important;
    display: flex !important;
    align-items: center !important;
}

.iq-sidebar-menu .iq-menu li a:hover {
    background-color: var(--hover-overlay) !important;
    color: var(--brand-tertiary) !important;
}

.iq-sidebar-menu .iq-menu li a.active,
.iq-sidebar-menu .iq-menu li a.iq-active {
    background-color: rgba(99, 102, 241, 0.1) !important;
    color: var(--brand-tertiary) !important;
    font-weight: var(--font-semibold) !important;
}

.iq-sidebar-menu .iq-menu li a i {
    color: var(--text-tertiary) !important;
    font-size: 1.25rem !important;
    margin-right: var(--space-3) !important;
    width: 24px !important;
    text-align: center !important;
}

.iq-sidebar-menu .iq-menu li a:hover i,
.iq-sidebar-menu .iq-menu li a.active i,
.iq-sidebar-menu .iq-menu li a.iq-active i {
    color: var(--brand-tertiary) !important;
}

/* -------------------------------------------------------------------------
   PROGRESS INDICATORS
   Course completion, loading states
   ------------------------------------------------------------------------- */
.progress-bar {
    width: 100%;
    height: 8px;
    background-color: var(--neutral-200);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--brand-tertiary), var(--brand-secondary));
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.progress-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-2);
    font-size: var(--font-size-sm);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
}

/* -------------------------------------------------------------------------
   BADGES & LABELS
   Status indicators, completion badges
   ------------------------------------------------------------------------- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-xs);
    font-weight: var(--font-semibold);
    line-height: 1;
    border-radius: var(--radius-full);
}

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

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

.badge-error {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--error);
}

.badge-info {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--info);
}

/* -------------------------------------------------------------------------
   ACCESSIBILITY PANEL
   Enhanced with all accessibility features
   ------------------------------------------------------------------------- */
#accessibility-panel {
    position: fixed;
    right: 0;
    top: 0;
    width: 360px;
    height: 100vh;
    background-color: var(--bg-primary);
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.15);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    z-index: var(--z-modal);
    overflow-y: auto;
    padding: var(--space-8);
}

#accessibility-panel.open {
    transform: translateX(0);
}

#accessibility-panel h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-6);
}

#accessibility-panel .accessibility-section {
    margin-bottom: var(--space-8);
}

#accessibility-panel .accessibility-section h4 {
    font-size: var(--font-size-sm);
    font-weight: var(--font-semibold);
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-4);
}

#accessibility-panel .accessibility-option {
    margin-bottom: var(--space-3);
}

#accessibility-panel .accessibility-option button {
    width: 100%;
    padding: var(--space-4);
    border: 2px solid var(--neutral-200);
    border-radius: var(--radius-lg);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-medium);
    text-align: left;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

#accessibility-panel .accessibility-option button:hover {
    border-color: var(--brand-tertiary);
    background-color: var(--hover-overlay);
}

#accessibility-panel .accessibility-option button.active {
    border-color: var(--brand-tertiary);
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--brand-tertiary);
}

#accessibility-panel .close-panel {
    position: absolute;
    top: var(--space-6);
    right: var(--space-6);
    background: transparent;
    border: none;
    font-size: var(--font-size-2xl);
    color: var(--text-tertiary);
    cursor: pointer;
    padding: var(--space-2);
    line-height: 1;
    transition: all var(--transition-base);
}

#accessibility-panel .close-panel:hover {
    color: var(--text-primary);
    transform: rotate(90deg);
}

/* -------------------------------------------------------------------------
   SIMPLIFIED MODE
   Reduced visual complexity for users who need it
   ------------------------------------------------------------------------- */
body.simplified-mode .card {
    box-shadow: none !important;
    border: 2px solid var(--neutral-300);
}

body.simplified-mode .card:hover {
    transform: none !important;
}

body.simplified-mode .btn:hover {
    transform: none !important;
}

body.simplified-mode * {
    animation: none !important;
    transition: none !important;
}

/* -------------------------------------------------------------------------
   UTILITY CLASSES
   ------------------------------------------------------------------------- */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-auto { margin-top: auto; }
.mb-auto { margin-bottom: auto; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}