/* ============================================
   OpenAI Agent Builder Training Platform
   Apple-inspired Design System
   ============================================ */

/* ============================================
   CSS Variables & Theme
   ============================================ */
:root {
    /* Apple SF Pro Font Stack */
    --font-primary: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SF Mono", Monaco, "Cascadia Code", "Courier New", monospace;
    
    /* Color Palette - Apple-inspired */
    --color-primary: #0071e3;
    --color-primary-dark: #0077ED;
    --color-primary-light: #2997ff;
    --color-secondary: #06c;
    --color-success: #30d158;
    --color-warning: #ff9f0a;
    --color-error: #ff3b30;
    
    /* Neutrals */
    --color-bg: #ffffff;
    --color-bg-alt: #f5f5f7;
    --color-bg-dark: #1d1d1f;
    --color-text: #1d1d1f;
    --color-text-secondary: #86868b;
    --color-border: #d2d2d7;
    --color-border-light: #e8e8ed;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px 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);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 40px;
    --spacing-xl: 64px;
    --spacing-2xl: 96px;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Container */
    --container-max: 1280px;
    --container-padding: 32px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: 17px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 { font-size: 56px; }
h2 { font-size: 48px; }
h3 { font-size: 32px; }
h4 { font-size: 24px; }
h5 { font-size: 20px; }
h6 { font-size: 17px; }

p {
    margin-bottom: var(--spacing-sm);
}

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

a:hover {
    color: var(--color-primary-dark);
}

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

ul, ol {
    padding-left: var(--spacing-md);
}

/* ============================================
   Container & Layout
   ============================================ */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section {
    padding: var(--spacing-2xl) 0;
}

.section-alt {
    background: var(--color-bg-alt);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-header h2 {
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 21px;
    color: var(--color-text-secondary);
    font-weight: 400;
}

/* ============================================
   Navigation
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
}

.nav.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-content {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 48px;
}

.nav-logo {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text);
}

.nav-links {
    display: flex;
    gap: var(--spacing-md);
}

.nav-links a {
    font-size: 14px;
    color: var(--color-text);
    transition: opacity var(--transition-fast);
}

.nav-links a:hover {
    opacity: 0.6;
    color: var(--color-text);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    padding: calc(var(--spacing-2xl) + 48px) 0 var(--spacing-2xl);
    text-align: center;
    background: linear-gradient(180deg, #f5f5f7 0%, #ffffff 100%);
}

.hero-badge {
    display: inline-block;
    padding: 6px 16px;
    background: var(--color-primary);
    color: white;
    border-radius: 24px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    animation: fadeInDown 0.6s ease-out;
}

.hero-title {
    font-size: 64px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.6s ease-out 0.1s both;
    background: linear-gradient(90deg, #1d1d1f 0%, #06c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 24px;
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.stat {
    text-align: center;
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-top: var(--spacing-xs);
}

/* ============================================
   Personalization Form
   ============================================ */
.personalization-form {
    max-width: 800px;
    margin: var(--spacing-xl) auto;
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

.personalization-form h3 {
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.form-description {
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.form-group input {
    padding: 12px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 17px;
    transition: all var(--transition-fast);
    background: white;
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.1);
}

.form-group input::placeholder {
    color: var(--color-text-secondary);
}

/* ============================================
   Buttons
   ============================================ */
.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 12px 32px;
    font-size: 17px;
    font-weight: 500;
    text-align: center;
    border-radius: var(--radius-xl);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    font-family: var(--font-primary);
}

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

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

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

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

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ============================================
   Video Section
   ============================================ */
.video-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.video-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border-light);
}

.video-meta-item {
    display: flex;
    gap: var(--spacing-xs);
    font-size: 14px;
}

.meta-label {
    color: var(--color-text-secondary);
}

.meta-value {
    font-weight: 500;
    color: var(--color-text);
}

.video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
}

.video-container iframe,
.video-container #player {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* ============================================
   Takeaway Cards
   ============================================ */
.takeaways-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.takeaway-card {
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid var(--color-border-light);
}

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

.takeaway-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-sm);
}

.takeaway-card h4 {
    margin-bottom: var(--spacing-sm);
}

.takeaway-card p {
    color: var(--color-text-secondary);
    font-size: 15px;
    margin-bottom: 0;
}

/* ============================================
   Learning Grid
   ============================================ */
.learning-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.learning-card {
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    text-align: center;
}

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

.learning-icon {
    font-size: 40px;
    margin-bottom: var(--spacing-sm);
}

.learning-card h4 {
    margin-bottom: var(--spacing-sm);
    font-size: 20px;
}

.learning-card p {
    color: var(--color-text-secondary);
    font-size: 15px;
    margin-bottom: 0;
}

/* ============================================
   Timeline
   ============================================ */
.timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    padding-left: 32px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    padding: var(--spacing-md) 0;
    cursor: pointer;
    transition: all var(--transition-base);
}

.timeline-item:hover {
    transform: translateX(4px);
}

.timeline-item:hover .timeline-marker {
    background: var(--color-primary);
    transform: scale(1.3);
}

.timeline-marker {
    position: absolute;
    left: -32px;
    top: 28px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-border);
    border: 2px solid white;
    transition: all var(--transition-base);
}

.timeline-content {
    padding-left: var(--spacing-md);
}

.timeline-time {
    display: inline-block;
    padding: 4px 12px;
    background: var(--color-primary);
    color: white;
    border-radius: 16px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.timeline-content h4 {
    margin-bottom: var(--spacing-xs);
    font-size: 18px;
}

.timeline-content p {
    color: var(--color-text-secondary);
    font-size: 15px;
    margin-bottom: 0;
}

/* ============================================
   Tools Grid
   ============================================ */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.tool-card {
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

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

.tool-icon {
    font-size: 40px;
    margin-bottom: var(--spacing-sm);
}

.tool-card h4 {
    margin-bottom: var(--spacing-sm);
    font-size: 20px;
}

.tool-card p {
    color: var(--color-text-secondary);
    font-size: 15px;
    margin-bottom: var(--spacing-sm);
}

.tool-link {
    display: inline-flex;
    align-items: center;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-primary);
    margin-top: var(--spacing-xs);
}

.tool-link:hover {
    color: var(--color-primary-dark);
}

/* ============================================
   Impact Grid
   ============================================ */
.impact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.impact-card {
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: all var(--transition-base);
}

.impact-card:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.impact-number {
    font-size: 64px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.impact-card h4 {
    margin-bottom: var(--spacing-sm);
}

.impact-card p {
    color: var(--color-text-secondary);
    font-size: 15px;
    margin-bottom: 0;
}

.why-content {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.why-content h3 {
    margin-bottom: var(--spacing-md);
}

.benefits-list {
    list-style: none;
    padding: 0;
}

.benefits-list li {
    padding: var(--spacing-sm) 0;
    font-size: 17px;
    border-bottom: 1px solid var(--color-border-light);
}

.benefits-list li:last-child {
    border-bottom: none;
}

/* ============================================
   SMB Grid
   ============================================ */
.smb-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.smb-card {
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

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

.smb-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-sm);
}

.smb-card h4 {
    margin-bottom: var(--spacing-sm);
}

.smb-card > p {
    color: var(--color-text-secondary);
    font-size: 15px;
    margin-bottom: var(--spacing-md);
}

.smb-example {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--color-primary);
}

.smb-example strong {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: 14px;
}

.smb-example p {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

/* ============================================
   AUTOMATIONS SECTION - NEW
   ============================================ */
.roi-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.roi-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

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

.roi-icon {
    font-size: 40px;
}

.roi-details {
    flex: 1;
}

.roi-number {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.roi-label {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-top: 4px;
}

.roi-progress-container {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.roi-progress-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    font-size: 17px;
    font-weight: 500;
}

.roi-progress-value {
    color: var(--color-primary);
    font-size: 24px;
    font-weight: 700;
}

.roi-progress-bar {
    height: 16px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.roi-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-success));
    border-radius: var(--radius-xl);
    transition: width 1s cubic-bezier(0.4, 0, 0.2, 1);
}

.automations-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.automation-card {
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid var(--color-border-light);
}

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

.automation-card.placeholder {
    text-align: center;
    padding: var(--spacing-xl);
    grid-column: 1 / -1;
}

.automation-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--spacing-md);
}

.automation-icon {
    font-size: 40px;
}

.automation-badge {
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.automation-badge.easy {
    background: #d1f4e0;
    color: #0f5132;
}

.automation-badge.medium {
    background: #fff3cd;
    color: #664d03;
}

.automation-badge.advanced {
    background: #f8d7da;
    color: #842029;
}

.automation-card h4 {
    font-size: 20px;
    margin-bottom: var(--spacing-sm);
}

.automation-description {
    color: var(--color-text-secondary);
    font-size: 15px;
    margin-bottom: var(--spacing-md);
    line-height: 1.5;
}

.automation-meta {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
}

.automation-meta-item {
    display: flex;
    flex-direction: column;
}

.meta-item-label {
    font-size: 12px;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
}

.meta-item-value {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
}

.meta-item-value.highlight {
    color: var(--color-success);
    font-size: 18px;
}

.automation-solution {
    padding: var(--spacing-md);
    background: linear-gradient(135deg, #e3f2fd 0%, #f3e5f5 100%);
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--color-primary);
}

.automation-solution strong {
    display: block;
    font-size: 14px;
    margin-bottom: var(--spacing-xs);
    color: var(--color-primary);
}

.automation-solution p {
    font-size: 14px;
    color: var(--color-text);
    margin-bottom: 0;
    line-height: 1.6;
}

.automation-cta {
    text-align: center;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, white 100%);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.automation-cta p {
    font-size: 18px;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

/* ============================================
   Exercises
   ============================================ */
.exercises {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}

.exercise-card {
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.exercise-card:hover {
    box-shadow: var(--shadow-md);
}

.exercise-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: var(--spacing-md);
}

.exercise-badge {
    background: var(--color-bg-alt);
    color: var(--color-text-secondary);
}

.exercise-card h3 {
    margin-bottom: var(--spacing-md);
}

.exercise-content {
    padding-left: var(--spacing-md);
    border-left: 3px solid var(--color-primary);
}

.exercise-steps {
    margin: var(--spacing-md) 0;
}

.exercise-steps h4 {
    font-size: 18px;
    margin-bottom: var(--spacing-sm);
}

.exercise-steps ol {
    padding-left: var(--spacing-md);
}

.exercise-steps li {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
}

.exercise-example {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
}

.exercise-example h4 {
    font-size: 16px;
    margin-bottom: var(--spacing-sm);
}

.exercise-example p {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

/* ============================================
   Quiz
   ============================================ */
.quiz-container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.quiz-progress {
    margin-bottom: var(--spacing-lg);
}

.quiz-progress-bar {
    height: 8px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-xl);
    overflow: hidden;
    margin-bottom: var(--spacing-sm);
}

.quiz-progress-fill {
    height: 100%;
    background: var(--color-primary);
    border-radius: var(--radius-xl);
    transition: width var(--transition-base);
}

.quiz-progress-text {
    font-size: 14px;
    color: var(--color-text-secondary);
    text-align: center;
}

.quiz-question {
    display: none;
}

.quiz-question.active {
    display: block;
    animation: fadeIn 0.3s ease-out;
}

.quiz-question h3 {
    margin-bottom: var(--spacing-lg);
    font-size: 24px;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.quiz-option {
    display: flex;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--color-bg-alt);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.quiz-option:hover {
    background: #e8f4ff;
    border-color: var(--color-primary);
}

.quiz-option input[type="radio"] {
    margin-right: var(--spacing-sm);
    cursor: pointer;
}

.quiz-option span {
    flex: 1;
    font-size: 17px;
}

.quiz-option.correct {
    background: #d1f4e0;
    border-color: var(--color-success);
}

.quiz-option.incorrect {
    background: #f8d7da;
    border-color: var(--color-error);
}

.quiz-navigation {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.quiz-results {
    text-align: center;
    animation: fadeIn 0.5s ease-out;
}

.quiz-score {
    margin-bottom: var(--spacing-xl);
}

.score-circle {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-success) 100%);
    color: white;
}

.score-number {
    font-size: 64px;
    font-weight: 700;
    line-height: 1;
}

.score-label {
    font-size: 18px;
    margin-top: var(--spacing-xs);
}

.quiz-feedback {
    margin-bottom: var(--spacing-lg);
    font-size: 18px;
    padding: var(--spacing-lg);
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
}

/* ============================================
   Flashcards
   ============================================ */
.flashcard-section {
    margin-bottom: var(--spacing-xl);
}

.flashcard-section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    font-size: 28px;
}

.flashcard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.flashcard {
    height: 300px;
    perspective: 1000px;
    cursor: pointer;
}

.flashcard-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s;
    transform-style: preserve-3d;
}

.flashcard.flipped .flashcard-inner {
    transform: rotateY(180deg);
}

.flashcard-front,
.flashcard-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.flashcard-front {
    background: linear-gradient(135deg, var(--color-primary) 0%, #2997ff 100%);
    color: white;
}

.flashcard-back {
    background: white;
    color: var(--color-text);
    transform: rotateY(180deg);
    border: 2px solid var(--color-primary);
}

.flashcard-number {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-md);
    font-size: 14px;
    font-weight: 700;
    opacity: 0.7;
}

.flashcard-front p,
.flashcard-back p {
    font-size: 18px;
    font-weight: 500;
    margin: 0;
    line-height: 1.4;
}

.flashcard-hint {
    position: absolute;
    bottom: var(--spacing-md);
    font-size: 12px;
    opacity: 0.6;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.flashcard-progress {
    text-align: center;
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.flashcard-progress p {
    font-size: 18px;
    margin-bottom: var(--spacing-md);
}

/* ============================================
   FAQ
   ============================================ */
.faq-container {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-base);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    cursor: pointer;
    user-select: none;
}

.faq-question h4 {
    margin: 0;
    font-size: 18px;
    font-weight: 500;
}

.faq-icon {
    font-size: 24px;
    font-weight: 300;
    color: var(--color-primary);
    transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

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

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

/* ============================================
   Tips Grid
   ============================================ */
.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.tip-card {
    padding: var(--spacing-lg);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border-left: 4px solid var(--color-primary);
}

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

.tip-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--color-primary);
    color: white;
    border-radius: 50%;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.tip-card h4 {
    margin-bottom: var(--spacing-sm);
    font-size: 20px;
}

.tip-card p {
    color: var(--color-text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

.tip-source {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border-light);
    font-size: 13px;
    color: var(--color-text-secondary);
}

.resources-section {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-xl);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.resources-section h3 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.resources-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.resource-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.resource-link:hover {
    background: #e8f4ff;
    border-color: var(--color-primary);
    transform: translateX(4px);
}

.resource-icon {
    font-size: 32px;
}

.resource-content h5 {
    margin-bottom: 4px;
    color: var(--color-text);
}

.resource-content p {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

/* ============================================
   Screenshots
   ============================================ */
.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.screenshot-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

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

.screenshot-card img {
    width: 100%;
    height: auto;
    display: block;
}

.screenshot-caption {
    padding: var(--spacing-md);
}

.screenshot-caption h4 {
    margin-bottom: var(--spacing-xs);
    font-size: 18px;
}

.screenshot-caption p {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

.video-cta {
    text-align: center;
    padding: var(--spacing-xl);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.video-cta h3 {
    margin-bottom: var(--spacing-sm);
}

.video-cta p {
    font-size: 18px;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--color-bg-dark);
    color: #f5f5f7;
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
    color: white;
    margin-bottom: var(--spacing-md);
    font-size: 18px;
}

.footer-section p {
    color: #86868b;
    font-size: 14px;
    line-height: 1.6;
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: #86868b;
    font-size: 14px;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid #424245;
}

.footer-bottom p {
    color: #86868b;
    font-size: 12px;
    margin-bottom: 0;
}

/* ============================================
   Notification Toast
   ============================================ */
.notification {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-text);
    color: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    transform: translateY(200%);
    transition: transform var(--transition-base);
    z-index: 2000;
    max-width: 400px;
}

.notification.show {
    transform: translateY(0);
}

.notification.success {
    background: var(--color-success);
}

.notification.error {
    background: var(--color-error);
}

/* ============================================
   Scroll to Top Button
   ============================================ */
.scroll-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 1000;
}

.scroll-top.show {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-4px);
}

/* ============================================
   Dynamic Text
   ============================================ */
.dynamic-text {
    color: var(--color-primary);
    font-weight: 600;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 1068px) {
    :root {
        --spacing-xl: 48px;
        --spacing-2xl: 64px;
        --container-padding: 24px;
    }
    
    .hero-title {
        font-size: 48px;
    }
    
    .hero-subtitle {
        font-size: 21px;
    }
    
    h2 {
        font-size: 40px;
    }
}

@media (max-width: 734px) {
    :root {
        --spacing-lg: 32px;
        --spacing-xl: 40px;
        --spacing-2xl: 48px;
        --container-padding: 16px;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    h2 {
        font-size: 32px;
    }
    
    h3 {
        font-size: 24px;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .takeaways-grid,
    .learning-grid,
    .tools-grid,
    .impact-grid,
    .smb-grid,
    .automations-grid,
    .tips-grid,
    .screenshots-grid {
        grid-template-columns: 1fr;
    }
    
    .flashcard-grid {
        grid-template-columns: 1fr;
    }
    
    .roi-summary {
        grid-template-columns: 1fr;
    }
    
    .quiz-navigation {
        flex-direction: column;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Print Styles
   ============================================ */
@media print {
    .nav,
    .notification,
    .scroll-top,
    .btn-primary,
    .btn-secondary {
        display: none !important;
    }
    
    .section {
        page-break-inside: avoid;
    }
}

/* ============================================
   Accessibility
   ============================================ */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.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;
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}