/* ===================================
   CSS Variables & Reset
   =================================== */
:root {
    --primary-color: #1a5490;
    --secondary-color: #2c7cc1;
    --accent-color: #e8505b;
    --text-dark: #1a1a1a;
    --text-medium: #4a4a4a;
    --text-light: #6b6b6b;
    --background-light: #f8f9fa;
    --background-white: #ffffff;
    --border-color: #e0e0e0;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 0.75rem;
    color: var(--text-dark);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

p {
    margin-bottom: 1rem;
    color: var(--text-medium);
}

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

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

/* ===================================
   Layout & Container
   =================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ===================================
   Navigation
   =================================== */
.navbar {
    background-color: var(--background-white);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h1 {
    font-size: 1.75rem;
    color: var(--primary-color);
    margin-bottom: 0;
}

.nav-brand .tagline {
    font-size: 0.75rem;
    color: var(--text-light);
    display: block;
    margin-top: -0.25rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-medium);
    font-weight: 500;
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    background: #f5f7fa;
    padding: 5rem 0;
    text-align: center;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-medium);
    max-width: 700px;
    margin: 0 auto 2rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================================
   Buttons
   =================================== */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 6px;
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--text-dark);
    color: white;
}

.btn-secondary:hover {
    background-color: var(--text-medium);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* ===================================
   Sections
   =================================== */
section {
    padding: 4rem 0;
}

section h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.section-intro {
    text-align: center;
    max-width: 700px;
    margin: -1.5rem auto 3rem;
    color: var(--text-medium);
}

/* ===================================
   Features Section
   =================================== */
.features {
    background-color: var(--background-white);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    text-align: center;
    padding: 2rem;
    background-color: var(--background-light);
    border-radius: 8px;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.feature-card p {
    color: var(--text-medium);
}

/* ===================================
   Events Section
   =================================== */
.events {
    background-color: var(--background-light);
}

.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.event-card {
    background-color: var(--background-white);
    padding: 2.5rem;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.event-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.event-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.event-topics {
    list-style: none;
    margin: 1.5rem 0;
}

.event-topics li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-medium);
}

.event-topics li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* ===================================
   CTA Section
   =================================== */
.cta-section {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
}

.cta-section h2 {
    color: white;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    margin: 0 auto 2rem;
    font-size: 1.1rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ===================================
   Page Header
   =================================== */
.page-header {
    background-color: var(--background-light);
    padding: 4rem 0 3rem;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.page-header h1 {
    font-size: 2.75rem;
    margin-bottom: 0.5rem;
}

.page-header .lead {
    font-size: 1.25rem;
    color: var(--text-medium);
}

/* ===================================
   About Page
   =================================== */
.about-content {
    background-color: var(--background-white);
}

.mission-statement {
    max-width: 800px;
    margin: 0 auto 4rem;
}

.mission-statement h2 {
    text-align: left;
    margin-bottom: 1.5rem;
}

.mission-statement p {
    font-size: 1.1rem;
    line-height: 1.8;
}

.values {
    max-width: 1000px;
    margin: 0 auto;
}

.values h2 {
    margin-bottom: 2rem;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.value-item {
    padding: 1.5rem;
    background-color: var(--background-light);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.value-item h3 {
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

/* ===================================
   Coaches Section
   =================================== */
.coaches {
    background-color: var(--background-light);
}

.coaches-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.coach-card {
    background-color: var(--background-white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition);
}

.coach-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.coach-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 600;
    margin: 0 auto 1.5rem;
}

.coach-card h3 {
    margin-bottom: 0.25rem;
}

.coach-title {
    color: var(--text-light);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.coach-bio {
    text-align: left;
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.coach-expertise {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.badge {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    background-color: var(--background-light);
    color: var(--primary-color);
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* ===================================
   Curriculum Overview
   =================================== */
.curriculum-overview {
    background-color: var(--background-white);
}

.overview-content {
    max-width: 800px;
    margin: 0 auto;
}

.overview-content h2 {
    text-align: left;
    margin-bottom: 1.5rem;
}

.overview-content p {
    font-size: 1.1rem;
    line-height: 1.8;
}

/* ===================================
   Roadmap Section
   =================================== */
.roadmap {
    background-color: var(--background-light);
}

.roadmap-track {
    margin-bottom: 3rem;
}

.track-header {
    text-align: center;
    margin-bottom: 2rem;
}

.track-header h3 {
    color: var(--primary-color);
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.track-header p {
    color: var(--text-medium);
}

.lessons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.lesson-card {
    background-color: var(--background-white);
    padding: 1.75rem;
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: block;
    border-left: 4px solid var(--primary-color);
}

.lesson-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-left-color: var(--accent-color);
}

.lesson-number {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 0.35rem 0.75rem;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.lesson-card h4 {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.lesson-card p {
    color: var(--text-medium);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.lesson-duration {
    color: var(--text-light);
    font-size: 0.85rem;
    font-style: italic;
}

/* ===================================
   Lesson Page
   =================================== */
.lesson-header {
    background-color: var(--background-light);
    padding: 3rem 0 2rem;
    border-bottom: 1px solid var(--border-color);
}

.lesson-meta {
    display: flex;
    gap: 2rem;
    justify-content: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.lesson-meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-medium);
    font-size: 0.95rem;
}

/* Video and Notes Layout */
.lesson-container {
    display: flex;
    gap: 2rem;
    max-width: 100%;
    margin: 0;
    padding: 2rem;
    min-height: calc(100vh - 400px);
}

.lesson-video-section {
    flex: 0 0 68%;
    position: sticky;
    top: 100px;
    height: fit-content;
}

.video-wrapper {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    background: #000;
    border: 3px double var(--navy);
}

.video-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.lesson-notes-section {
    flex: 0 0 calc(32% - 2rem);
    overflow-y: auto;
    max-height: calc(100vh - 150px);
    position: sticky;
    top: 100px;
    background: var(--cream);
    padding: 2rem;
    border: 3px double var(--navy);
}

.lesson-content {
    line-height: 1.8;
}

.lesson-content h2 {
    text-align: left;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.lesson-content h3 {
    text-align: left;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

.lesson-content ul,
.lesson-content ol {
    margin-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.lesson-content li {
    margin-bottom: 0.5rem;
    color: var(--text-medium);
}

.lesson-content strong {
    color: var(--text-dark);
}

.key-concept {
    background-color: var(--background-light);
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: 4px;
}

.key-concept h4 {
    color: var(--primary-color);
    margin-bottom: 0.75rem;
}

.practice-exercise {
    background-color: #fff8e1;
    border-left: 4px solid #ffc107;
    padding: 1.5rem;
    margin: 2rem 0;
    border-radius: 4px;
}

.practice-exercise h4 {
    color: #f57c00;
    margin-bottom: 0.75rem;
}

.lesson-nav {
    background-color: var(--background-light);
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
}

.lesson-nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-button {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background-color: var(--background-white);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    transition: var(--transition);
}

.nav-button:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* ===================================
   Footer
   =================================== */
footer {
    background-color: var(--text-dark);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

footer p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 0;
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    .nav-links {
        gap: 1rem;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .events-grid,
    .lessons-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 1rem;
    }

    /* Video/Notes responsive */
    .lesson-container {
        flex-direction: column;
        padding: 1rem;
    }

    .lesson-video-section {
        flex: 0 0 100%;
        position: relative;
        top: 0;
    }

    .lesson-notes-section {
        flex: 0 0 100%;
        position: relative;
        top: 0;
        max-height: none;
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .nav-links {
        font-size: 0.9rem;
        gap: 0.75rem;
    }
    
    .hero {
        padding: 3rem 0;
    }
    
    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.95rem;
    }
}