/* CSS Custom Properties (Variables) */
:root {
    --primary: #6B73FF;
    --secondary: #9B59B6;
    --dark: #1A1A1A;
    --dark-gray: #2C2C2C;
    --light-gray: #AAAAAA;
    --white: #FFFFFF;
    --error: #FF6B6B;
    --success: #4ECDC4;
    --happy: #4CAF50;
    --sad: #F44336;
    --input-border: #3A3A3A;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--dark);
    color: var(--white);
    overflow-x: hidden;
    line-height: 1.6;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--secondary);
}

/* Lists */
ul, ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.25rem;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

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

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

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

.fade-in {
    animation: fadeIn 0.5s ease-out;
}

.pulse {
    animation: pulse 2s infinite;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--dark);
}

::-webkit-scrollbar-thumb {
    background: var(--dark-gray);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--input-border);
}

/* Focus Styles */
:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Selection Styles */
::selection {
    background: var(--primary);
    color: var(--white);
}