/* SafeInvex Research - Accessible Unified CSS Design System */

:root {
    /* Fonts scale factor */
    --font-scale: 100%;
    
    /* Default Dark Luxury Theme Palette */
    --primary-emerald: #10b981;
    --primary-emerald-hover: #34d399;
    --primary-emerald-rgb: 16, 185, 129;
    --secondary-cyan: #06b6d4;
    --secondary-cyan-rgb: 6, 182, 212;
    
    --background: #020617; /* Slate 950 */
    --surface: #0f172a;    /* Slate 900 */
    --surface-glass: rgba(15, 23, 42, 0.6);
    --border-color: rgba(255, 255, 255, 0.05);
    
    --text-primary: #f8fafc;   /* Slate 50 */
    --text-secondary: #cbd5e1; /* Slate 300 */
    --text-muted: #94a3b8;     /* Slate 400 */
    
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
}

/* High Contrast Dark Mode */
[data-contrast="high-dark"] {
    --primary-emerald: #34d399; /* Brightened green */
    --primary-emerald-hover: #a7f3d0;
    --primary-emerald-rgb: 52, 211, 153;
    --secondary-cyan: #22d3ee;
    
    --background: #000000; /* Pure black */
    --surface: #111827;    /* Darker slate */
    --surface-glass: rgba(0, 0, 0, 0.8);
    --border-color: rgba(255, 255, 255, 0.2);
    
    --text-primary: #ffffff;
    --text-secondary: #f1f5f9;
    --text-muted: #cbd5e1;
}

/* High Contrast Light Mode */
[data-contrast="high-light"] {
    --primary-emerald: #047857; /* Darker green */
    --primary-emerald-hover: #065f46;
    --primary-emerald-rgb: 4, 120, 87;
    --secondary-cyan: #0e7490;
    
    --background: #ffffff; /* Pure white */
    --surface: #f1f5f9;    /* Light gray slate */
    --surface-glass: rgba(255, 255, 255, 0.9);
    --border-color: rgba(15, 23, 42, 0.15);
    
    --text-primary: #000000;
    --text-secondary: #1e293b;
    --text-muted: #475569;
}

/* Base Accessibility Layout */
html {
    font-size: var(--font-scale);
    scroll-behavior: smooth;
    transition: font-size 0.2s ease-in-out;
}

body {
    background-color: var(--background);
    color: var(--text-secondary);
    font-family: 'Outfit', sans-serif;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Focus Indicator Styles (WCAG 2.2 AA Compliance) */
a:focus-visible, 
button:focus-visible, 
input:focus-visible, 
textarea:focus-visible,
select:focus-visible,
[tabindex="0"]:focus-visible {
    outline: 3px solid var(--primary-emerald) !important;
    outline-offset: 4px !important;
    box-shadow: 0 0 0 4px var(--background) !important;
    border-radius: 4px;
}

/* Skip to main content link */
.skip-to-content-link {
    position: absolute;
    top: -100px;
    left: 20px;
    background: var(--primary-emerald);
    color: #020617; /* High contrast dark */
    padding: 12px 24px;
    font-weight: 700;
    z-index: 9999;
    border-radius: 8px;
    transition: top 0.2s ease;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
}

.skip-to-content-link:focus {
    top: 20px;
}

/* Accessibility Modes overrides */

/* 1. Dyslexia Font Toggle */
[data-font="dyslexia"] {
    font-family: 'OpenDyslexic', 'Comic Sans MS', sans-serif !important;
    letter-spacing: 0.15em !important;
    word-spacing: 0.3em !important;
    line-height: 1.6 !important;
}

[data-font="dyslexia"] p,
[data-font="dyslexia"] li,
[data-font="dyslexia"] span,
[data-font="dyslexia"] a {
    font-weight: 500 !important;
}

/* 2. Pause Animations */
[data-motion="paused"] *,
[data-motion="paused"] *::before,
[data-motion="paused"] *::after {
    animation-delay: -1ms !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
    scroll-behavior: auto !important;
}

/* 3. Grayscale Mode */
[data-color="grayscale"] {
    filter: grayscale(100%) !important;
}

/* 4. Link Highlighting */
[data-links="highlighted"] a {
    text-decoration: underline !important;
    text-decoration-color: var(--primary-emerald) !important;
    text-decoration-thickness: 2px !important;
    font-weight: 700 !important;
}

/* Scroll Progress Bar */
#scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(to right, var(--primary-emerald), var(--secondary-cyan));
    z-index: 1000;
    width: 0%;
    transition: width 0.1s;
}

/* Custom Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--background);
}
::-webkit-scrollbar-thumb {
    background: var(--surface);
    border: 2px solid var(--background);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary-emerald);
}

/* Glassmorphism Accents */
.glass-card {
    background: var(--surface-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
}

/* Active Nav Links styling */
.nav-active {
    color: var(--primary-emerald) !important;
    border-bottom: 2px solid var(--primary-emerald);
}

/* Screen Reader Only Utility */
.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;
}