/* =========================================
   1. Variables & Design System
   ========================================= */
:root {
    /* Colors */
    --color-bg: #0F0F0F;
    --color-surface: #1A1A1A;
    --color-surface-hover: #252525;
    --color-text-main: #FFFFFF;
    --color-text-muted: #A1A1A1;

    /* Chalk Colors */
    --color-primary: #C7DE91;
    /* Green Chalk - for buttons */
    --color-primary-hover: #b3c982;
    --color-text-accent: #DE3C4B;
    /* Red - for text highlights */
    --color-danger: #DE3C4B;
    /* Red Chalk */
    --color-accent-blue: #6BCAFF;
    --color-accent-purple: #D4A5FF;
    --color-accent-yellow: #FFE680;

    /* Typography */
    --font-main: 'Inter', sans-serif;

    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-xxl: 64px;
    --spacing-section-mobile: 60px;
    --spacing-section-desktop: 100px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
}

/* =========================================
   2. Reset & Base Styles
   ========================================= */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--color-bg);
    background-image: url('images/bg.jpg');
    background-repeat: repeat;
    background-attachment: fixed;
    color: var(--color-text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

ul,
ol {
    list-style: none;
}

/* =========================================
   3. Typography
   ========================================= */
h1,
h2,
h3,
h4,
h5,
h6 {
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-main);
}

h1 {
    font-size: 2.5rem;
    /* Mobile */
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.75rem;
    /* Mobile */
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.25rem;
}

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

.text-highlight {
    color: var(--color-text-accent);
    /* Light green for text highlights */
    display: block;
}

@media (min-width: 768px) {
    h1 {
        font-size: 3.5rem;
    }

    h2 {
        font-size: 2.5rem;
    }

    h3 {
        font-size: 1.5rem;
    }

    .text-highlight {
        display: inline;
    }
}

/* =========================================
   4. Utility Classes
   ========================================= */
.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.text-primary {
    color: var(--color-primary);
}

.text-danger {
    color: var(--color-danger);
}

/* =========================================
   5. Components: Buttons
   ========================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 40px;
    font-weight: 700;
    font-size: 1.1rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

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

.btn-primary {
    background-color: var(--color-primary);
    color: #000;
}

.btn-primary:hover {
    background-color: var(--color-primary-hover);
}

/* =========================================
   6. Layout Sections
   ========================================= */
section {
    padding: var(--spacing-section-mobile) 0;
}

@media (min-width: 768px) {
    section {
        padding: var(--spacing-section-desktop) 0;
    }
}

/* =========================================
   7. Hero Section
   ========================================= */
.hero {
    padding-top: 120px;
    padding-bottom: var(--spacing-section-mobile);
}

@media (min-width: 768px) {
    .hero {
        padding-top: 170px;
        padding-bottom: var(--spacing-section-desktop);
    }
}

.hero-subtitle {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
}

.hero-price {
    margin-bottom: var(--spacing-lg);
}

.price-label {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-main);
}

.price-values {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 2rem;
    font-weight: 800;
}

.price-old {
    text-decoration: line-through;
    color: var(--color-text-muted);
    font-size: 1.5rem;
}

.price-new {
    color: var(--color-danger);
    /* Red for the sale price */
}

.btn-hero {
    min-width: 250px;
}

/* =========================================
   8. Teacher Section (Single Image Layout)
   ========================================= */
.teacher-section {
    padding: var(--spacing-section-mobile) 0;
}

.teachers-image-wrapper {
    margin-bottom: var(--spacing-xl);
}

.teachers-image {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    display: block;
}

.teachers-info-grid {
    display: grid;
    gap: var(--spacing-xl);
}

.teacher-info h2 {
    margin-bottom: var(--spacing-sm);
}

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

/* Tablet and up: side-by-side text */
@media (min-width: 768px) {
    .teachers-info-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xxl);
    }
}

/* Desktop: optimize spacing */
@media (min-width: 1024px) {
    .teachers-info-grid {
        gap: 80px;
    }
}

/* =========================================
   9. 6-Step Framework System (Timeline Layout)
   ========================================= */
.section-header {
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
}

.pillars-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.pillar-card {
    background-color: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid #2a2a2a;
    transition: all var(--transition-fast);
    position: relative;
    padding-left: 80px;
}

.pillar-card:hover {
    border-color: var(--color-text-accent);
    transform: translateX(8px);
}

.pillar-card::before {
    content: attr(data-step);
    position: absolute;
    left: var(--spacing-lg);
    top: var(--spacing-lg);
    width: 40px;
    height: 40px;
    background: var(--color-text-accent);
    color: #000;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.25rem;
    z-index: 2;
}

/* Centered down arrow between cards */
.pillar-card::after {
    content: '↓';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: calc(var(--spacing-lg) * -1);
    font-size: 2rem;
    color: #2a2a2a;
    font-weight: bold;
    z-index: 1;
}

/* Remove arrow from last card */
.pillar-card:last-child::after {
    display: none;
}

.pillar-icon {
    display: none;
}

.pillar-card h3 {
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-main);
}

.pillar-card > p {
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.pillar-list {
    margin-top: var(--spacing-sm);
    padding-left: var(--spacing-md);
}

.pillar-list li {
    list-style-type: none;
    margin-bottom: 6px;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    position: relative;
    padding-left: 20px;
}

.pillar-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-text-accent);
    font-weight: bold;
}

@media (min-width: 768px) {
    .pillar-card {
        padding-left: 100px;
    }
    
    .pillar-card::before {
        left: var(--spacing-md);
        width: 48px;
        height: 48px;
        font-size: 1.5rem;
    }
}

/* =========================================
   10. Classes Start CTA Bar
   ========================================= */
.cta-bar {
    background-color: var(--color-text-accent);
    color: #000;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    display: inline-block;
    transform: rotate(-1deg);
    margin-bottom: var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.cta-bar:hover {
    transform: rotate(-1deg) scale(1.05);
    box-shadow: 0 4px 12px rgba(222, 60, 75, 0.4);
}

.cta-bar h2 {
    margin: 0;
    font-size: 1.5rem;
    color: #000;
}

/* =========================================
   11. Comparison Section (Bold Icon-Based)
   ========================================= */
.comparison-grid {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.comparison-card {
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 2px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.comparison-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.03;
    z-index: 0;
    pointer-events: none;
}

.card-success::before {
    background-color: var(--color-primary);
}

.card-danger::before {
    background-color: var(--color-danger);
}

.comparison-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.2);
}

.card-success:hover {
    box-shadow: 0 8px 30px rgba(199, 222, 145, 0.15);
}

.card-danger:hover {
    box-shadow: 0 8px 30px rgba(222, 60, 75, 0.15);
}

.comparison-card > * {
    position: relative;
    z-index: 1;
}

.card-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
}

.card-success .card-icon {
    background-color: var(--color-primary);
    color: #000;
}

.card-danger .card-icon {
    background-color: var(--color-danger);
    color: #fff;
}

.card-title {
    margin-bottom: var(--spacing-md);
    font-size: 1.35rem;
    text-align: center;
}

.text-success {
    color: var(--color-primary);
}

/* .text-danger is already defined in utility classes */

.check-list,
.cross-list {
    text-align: left;
    max-width: 500px;
    margin: 0 auto;
}

.check-list li,
.cross-list li {
    position: relative;
    padding-left: 35px;
    margin-bottom: 16px;
    color: var(--color-text-main);
    font-size: 1rem;
    line-height: 1.5;
}

.check-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
    font-size: 1.3rem;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(199, 222, 145, 0.15);
    border-radius: 50%;
    line-height: 1;
}

.cross-list li::before {
    content: '✕';
    position: absolute;
    left: 0;
    color: var(--color-danger);
    font-weight: bold;
    font-size: 1.3rem;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(222, 60, 75, 0.15);
    border-radius: 50%;
    line-height: 1;
}

.comparison-footer {
    max-width: 700px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .comparison-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xxl);
    }
    
    .card-icon {
        width: 100px;
        height: 100px;
        font-size: 3rem;
    }
}

/* =========================================
   12. Community Section
   ========================================= */
.community-grid {
    display: grid;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.community-card {
    background-color: #151515;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid #222;
}

.community-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    display: flex;
    justify-content: center;
    align-items: center;
}

.community-icon img {
    width: 60px;
    height: 60px;
    filter: brightness(0) saturate(100%) invert(32%) sepia(94%) saturate(1384%) hue-rotate(332deg) brightness(94%) contrast(91%);
}

@media (min-width: 768px) {
    .community-icon img {
        width: 80px;
        height: 80px;
    }
}

.text-link {
    color: var(--color-text-accent);
    font-weight: 600;
    font-size: 0.9rem;
}

.difference-card {
    background: linear-gradient(180deg, #1A1A1A 0%, #111 100%);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid #333;
    margin-top: var(--spacing-xl);
}

.difference-features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    color: var(--color-text-main);
    font-weight: 600;
}

@media (min-width: 768px) {
    .community-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* =========================================
   13. Highlights Row
   ========================================= */
.highlights-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
}

.highlight-item {
    background-color: var(--color-surface);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    text-align: center;
    min-width: 140px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.highlight-val {
    display: block;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-text-accent);
}

.highlight-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.highlight-green .highlight-val {
    color: var(--color-primary);
}

.highlight-green {
    border: 1px solid var(--color-primary);
    background-color: rgba(199, 222, 145, 0.1);
}

/* =========================================
   14. FAQ Section
   ========================================= */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 1px solid #333;
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: var(--spacing-md) 0;
    text-align: left;
    color: var(--color-text-main);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chevron {
    transition: transform var(--transition-fast);
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.faq-answer p {
    padding-bottom: var(--spacing-md);
    margin-bottom: 0;
}

.faq-item.active .chevron {
    transform: rotate(180deg);
}

.faq-item.active .faq-answer {
    max-height: 200px;
    /* Approximate max height */
}

/* =========================================
   15. Final CTA
   ========================================= */
.final-cta {
    padding-bottom: var(--spacing-xxl);
}