/**
 * Global Theme Core Token System
 * Refactored to match premium layout signatures in Screenshot 2026-07-04 053949.jpg
 */
:root {
    /* Elegant Pastel & Minimalist Tech Palette */
    --bg-canvas: #FFFFFF;           /* Pristine White Background */
    --text-dark: #1A1A1A;           /* Soft Dark Charcoal for Headers/Type */
    --text-muted: #6B7280;          /* Professional Neutral Grey for Meta Details */
    
    /* Signature Pastel Component Backdrops */
    --color-lavender: #D9D7F9;      /* Featured Pastel Violet */
    --color-sage: #E2F0D9;          /* Calm Accent Green */
    --color-butter: #FFF2CC;        /* Warm Pastel Yellow */
    --color-ash: #EDF1F4;           /* Light Cool Grey Meta Fill */
    
    /* Global Layout Rules - Enhanced organic rounding */
    --radius-container: 32px;
    --radius-card: 20px;
    --radius-pill: 9999px;
    
    /* Ambient Borderless SaaS Shadows */
    --saas-shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.02);
    --saas-shadow-md: 0 10px 40px rgba(0, 0, 0, 0.04);
    --saas-shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.06);
}

/* Base Body Application Container Layout */
body {
    background-color: var(--bg-canvas);
    color: var(--text-dark);
    font-family: -apple-system, BlinkMacSystemFont, "Inter", "SF Pro Display", sans-serif;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
}

/* Master Wrapping Frame Canvas */
.site-main-canvas-wrapper {
    background: transparent;
    padding: 24px;
    max-width: 1320px;
    width: 100%;
    margin: 0 auto;
    box-sizing: border-box;
}

@media (min-width: 992px) {
    .site-main-canvas-wrapper {
        padding: 40px 24px;
    }
}

/* Typography Rules */
h1, h2, h3, h4 {
    color: var(--text-dark);
    font-weight: 800;
    letter-spacing: -0.03em; /* Clean, tight modern tracking tracking */
    margin-top: 0;
}

/* --- REUSABLE PREMIUM BENTO CARD BASE --- */
.elearning-card-base {
    background-color: var(--bg-canvas);
    border: 1px solid #E5E7EB;
    border-radius: var(--radius-container);
    padding: 32px;
    box-sizing: border-box;
    box-shadow: var(--saas-shadow-sm);
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s ease;
}
.elearning-card-base:hover {
    transform: translateY(-4px);
    box-shadow: var(--saas-shadow-md);
}

/* --- THE TRACK ACCENT PASTEL HIGHLIGHT SYSTEM --- */
.track-marketing {
    --track-color-bg: var(--color-butter); 
}
.track-computer-science {
    --track-color-bg: var(--color-lavender); 
}
.track-psychology {
    --track-color-bg: var(--color-sage); 
}

/* Borderless Asymmetric Pastel Bento Box Card Design Pattern */
.course-track-highlight-card {
    background-color: var(--track-color-bg);
    border: none;
    border-radius: var(--radius-container);
    padding: 36px;
    color: var(--text-dark);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    box-shadow: var(--saas-shadow-sm);
    transition: transform 0.2s ease;
}
.course-track-highlight-card:hover {
    transform: scale(1.01);
}

/* --- CORE INTERACTIVE ELEMENTS --- */

/* Clean SaaS Rounded Action Button */
.btn-action-primary {
    background-color: var(--text-dark);
    color: #FFFFFF !important;
    border: none;
    border-radius: var(--radius-pill);
    padding: 14px 28px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    transition: opacity 0.15s ease, transform 0.15s ease;
}
.btn-action-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

/* Sleek Minimalist Search Pill */
.search-input-pill {
    background-color: var(--color-ash);
    border: 1px solid transparent;
    border-radius: var(--radius-pill);
    padding: 14px 24px;
    font-size: 0.95rem;
    color: var(--text-dark);
    outline: none;
    width: 100%;
    max-width: 360px;
    transition: all 0.2s ease;
}
.search-input-pill:focus {
    background-color: var(--bg-canvas);
    border-color: #D1D5DB;
}

/* Elegant Streamlined Progress Tracks */
.course-progress-bar-container {
    background-color: rgba(0, 0, 0, 0.05); /* Soft gray background channel mask */
    border-radius: var(--radius-pill);
    height: 6px;
    width: 100%;
    overflow: hidden;
    margin: 16px 0;
}
.course-progress-bar-fill {
    background-color: var(--text-dark); /* Solid clean active track indicator tint */
    height: 100%;
    width: 0%;
    border-radius: var(--radius-pill);
}

/* Navigation Category Pill Filter Items matching Popular Courses tags */
.filter-pill-tag {
    background: transparent;
    border: 1px solid var(--text-dark);
    border-radius: var(--radius-pill);
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-dark);
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
}
.filter-pill-tag:hover,
.filter-pill-tag.active-tag {
    background-color: var(--text-dark);
    color: #FFFFFF;
}