/* ===========================
   CSS Variables & Reset
   =========================== */

:root {
    /* Color Palette - Robot Framework inspired (dark + teal/cyan accent) */
    --color-primary: #0F2A3F;
    --color-primary-dark: #071826;
    --color-secondary: #1A4A6B;
    --color-accent: #00C2A8;
    --color-accent-hover: #00A88F;
    --color-bg-dark: #050F1A;
    --color-bg-medium: #0D1F30;
    --color-bg-light: #152B40;
    --color-text-primary: #FFFFFF;
    --color-text-secondary: #B0C8D8;
    --color-text-muted: #6E8FA3;
    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-free: #00C2A8;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #0F2A3F 0%, #1A4A6B 100%);
    --gradient-cta: linear-gradient(135deg, #00C2A8 0%, #00E5CC 100%);
    --gradient-hero: linear-gradient(135deg, #050F1A 0%, #0D1F30 50%, #152B40 100%);
    --gradient-card: linear-gradient(135deg, rgba(15, 42, 63, 0.15) 0%, rgba(26, 74, 107, 0.15) 100%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    /* Typography */
    --font-primary: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --glow-accent: 0 4px 20px rgba(0, 194, 168, 0.4);
    --glow-teal: 0 0 30px rgba(0, 194, 168, 0.5);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background: var(--color-bg-dark);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===========================
   Header Navigation (Desktop Only)
   =========================== */

.main-header {
    display: none;
}

@media (min-width: 768px) {
    .main-header {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        background: rgba(5, 15, 26, 0.95);
        backdrop-filter: blur(10px);
        border-bottom: 1px solid rgba(0, 194, 168, 0.2);
        z-index: 1000;
        padding: 0.6rem 0;
    }

    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 1.5rem;
    }

    .header-logo {
        display: flex;
        align-items: center;
        flex-shrink: 0;
        text-decoration: none;
    }

    .logo-svg {
        height: 32px;
        width: auto;
    }

    .header-nav {
        display: flex;
        justify-content: flex-end;
        align-items: center;
        gap: 1.5rem;
    }

    .nav-link {
        color: var(--color-text-secondary);
        text-decoration: none;
        font-weight: 600;
        font-size: 0.95rem;
        transition: color 0.3s ease;
        padding: 0.5rem 1rem;
        border-radius: var(--radius-sm);
    }

    .nav-link:hover {
        color: var(--color-accent);
    }

    .nav-link.nav-cta {
        background: var(--gradient-cta);
        color: var(--color-bg-dark);
        padding: 0.6rem 1.5rem;
        border-radius: var(--radius-full);
        font-weight: 700;
        box-shadow: 0 4px 12px rgba(0, 194, 168, 0.3);
    }

    .nav-link.nav-cta:hover {
        color: var(--color-bg-dark);
        box-shadow: 0 6px 16px rgba(0, 194, 168, 0.5);
        transform: translateY(-2px);
    }

    body {
        padding-top: 80px;
    }
}

/* ===========================
   Typography
   =========================== */

h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-4xl));
    color: var(--color-text-primary);
}

h2 {
    font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-3xl));
    color: var(--color-text-primary);
}

h3 {
    font-size: var(--font-size-xl);
    color: var(--color-text-primary);
}

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

strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

/* ===========================
   Layout & Container
   =========================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

section {
    padding: var(--spacing-xxl) 0;
}

section:nth-child(odd) {
    background: var(--color-bg-dark);
}

section:nth-child(even) {
    background: var(--color-bg-medium);
    border-top: 2px solid rgba(0, 194, 168, 0.15);
    border-bottom: 2px solid rgba(0, 194, 168, 0.15);
}

/* ===========================
   Hero Section
   =========================== */

.hero {
    background: var(--gradient-hero);
    padding: var(--spacing-lg) 0;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(0, 194, 168, 0.06) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 229, 204, 0.06) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

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

.hero-text h1 {
    margin-bottom: var(--spacing-sm);
}

.free-badge {
    display: inline-block;
    background: var(--gradient-cta);
    color: var(--color-bg-dark);
    font-size: 0.85rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 0.35rem 1rem;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-sm);
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin: 0 auto var(--spacing-lg);
    max-width: 880px;
    width: 100%;
}

.hero-benefits {
    background: rgba(0, 194, 168, 0.08);
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin: var(--spacing-md) auto var(--spacing-lg);
    max-width: 880px;
    width: 100%;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    align-self: flex-start;
}

.benefit-item:last-child {
    margin-bottom: 0;
}

.benefit-icon {
    font-size: var(--font-size-xl);
    flex-shrink: 0;
    line-height: 1;
}

.benefit-text {
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    font-weight: 600;
    line-height: 1.6;
}

.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.info-card {
    background: rgba(0, 194, 168, 0.1);
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    text-align: center;
    transition: all 0.3s ease;
}

.info-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--glow-teal);
}

.info-card .icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    display: block;
}

.info-card .label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.info-card .value {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-accent);
}

.hero-image {
    display: flex;
    justify-content: center;
}

.author-photo {
    width: 280px;
    height: auto;
    border-radius: var(--radius-lg);
    object-fit: contain;
    border: 3px solid rgba(0, 194, 168, 0.4);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

.author-photo:hover {
    transform: scale(1.04);
}

.hero-urgency {
    font-size: 0.95rem;
    color: var(--color-text-primary);
    font-weight: 700;
    margin: var(--spacing-sm) 0;
    line-height: 1.5;
}

.signup-info-box {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(0, 194, 168, 0.1);
    border-left: 3px solid var(--color-accent);
    border-radius: 4px;
    max-width: 880px;
    width: 100%;
    margin-left: auto;
    margin-right: auto;
}

/* ===========================
   Buttons
   =========================== */

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    font-size: var(--font-size-lg);
    font-weight: 700;
    text-decoration: none;
    border-radius: var(--radius-full);
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-family: var(--font-primary);
}

.cta-button.primary {
    background: var(--gradient-cta);
    color: var(--color-bg-dark);
    box-shadow: var(--glow-accent);
}

.cta-button.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 194, 168, 0.6);
}

.cta-top {
    margin-top: var(--spacing-lg);
}

/* ===========================
   Cards & Sections
   =========================== */

.card {
    background: var(--color-bg-medium);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-accent);
    box-shadow: var(--shadow-md);
}

/* ===========================
   Target Audience Section
   =========================== */

.target-audience h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.columns {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.column {
    background: var(--color-bg-medium);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 2px solid var(--color-accent);
    box-shadow: var(--shadow-md);
}

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

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

.checklist li {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    background: rgba(0, 194, 168, 0.07);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    position: relative;
    padding-left: var(--spacing-lg);
}

.checklist li::before {
    content: '✓';
    position: absolute;
    left: var(--spacing-sm);
    color: var(--color-success);
    font-weight: bold;
}

.checklist.negative li {
    background: rgba(248, 113, 113, 0.08);
}

.checklist.negative li::before {
    content: '×';
    color: var(--color-warning);
}

/* ===========================
   Features Grid
   =========================== */

.what-you-get h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--color-bg-medium);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 2px solid var(--color-accent);
    text-align: center;
    transition: box-shadow 0.3s ease;
    box-shadow: var(--shadow-md);
}

.feature-card:hover {
    box-shadow: var(--glow-teal);
}

.feature-card .icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-xl);
}

.feature-card p {
    margin-bottom: 0;
    color: var(--color-text-muted);
}

/* ===========================
   Lesson Plan / Agenda
   =========================== */

.lesson-plan {
    background: var(--color-bg-medium);
}

.lesson-plan .container {
    text-align: center;
}

.timeline {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

.timeline-item {
    background: var(--color-bg-dark);
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-md);
    padding: 0;
    position: relative;
    transition: all 0.3s ease;
    cursor: pointer;
}

.timeline-item summary {
    padding: var(--spacing-lg);
    list-style: none;
    cursor: pointer;
    text-align: center;
}

.timeline-item summary::-webkit-details-marker {
    display: none;
}

.timeline-item summary::after {
    content: '▼';
    position: absolute;
    right: var(--spacing-lg);
    top: var(--spacing-lg);
    color: var(--color-accent);
    font-size: 0.875rem;
    transition: transform 0.3s ease;
}

.timeline-item[open] summary::after {
    transform: rotate(180deg);
}

.timeline-item:hover {
    box-shadow: var(--glow-teal);
}

.timeline-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.timeline-subtitle {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 0;
}

.timeline-content {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    text-align: left;
}

.timeline-content ul {
    list-style: none;
    padding: 0;
    margin: var(--spacing-sm) 0 0;
}

.timeline-content ul li {
    padding-left: var(--spacing-md);
    position: relative;
    margin-bottom: var(--spacing-xs);
}

.timeline-content ul li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

/* ===========================
   Learning Outcomes
   =========================== */

.what-you-learn h2 {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.learning-outcomes {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.outcome-card {
    background: var(--color-bg-medium);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 2px solid var(--color-accent);
    border-left: 4px solid var(--color-accent);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.outcome-card .checkmark {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-accent);
    flex-shrink: 0;
}

.outcome-content {
    flex: 1;
}

.outcome-card p {
    margin-bottom: 0;
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

/* ===========================
   About Author Section
   =========================== */

.about-author {
    background: var(--color-bg-dark);
}

.about-author h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.author-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    align-items: center;
}

.author-image-wrapper {
    display: flex;
    justify-content: center;
}

.author-photo-about {
    width: 100%;
    max-width: 320px;
    height: auto;
    border-radius: var(--radius-lg);
    border: 3px solid rgba(0, 194, 168, 0.4);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
}

.author-photo-about:hover {
    transform: scale(1.04);
}

.author-bio p {
    font-size: var(--font-size-base);
    line-height: 1.5;
    margin-bottom: var(--spacing-sm);
}

.author-lead {
    font-size: var(--font-size-lg) !important;
}

.author-highlights {
    list-style: none;
    padding: 0;
    margin-top: var(--spacing-sm);
}

.author-highlights li {
    padding: var(--spacing-xs) 0;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-secondary);
    position: relative;
    padding-left: var(--spacing-lg);
    font-size: 0.95rem;
    line-height: 1.4;
}

.author-highlights li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
    font-size: 1.2rem;
}

.author-social {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.social-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    border: 1px solid rgba(255,255,255,0.1);
    background: var(--color-bg-light);
    color: var(--color-text-primary);
    font-weight: 600;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.social-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.social-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    text-transform: uppercase;
    font-weight: 700;
    color: white;
}

.social-link.linkedin .social-icon {
    background: #0A66C2;
}

.social-link.github .social-icon {
    background: #24292E;
}

/* ===========================
   Social Proof Section
   =========================== */

.social-proof h2 {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.social-proof-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.social-proof-item {
    width: 100%;
    margin: 0;
    border-radius: 16px;
    overflow: hidden;
    border: 3px solid var(--color-accent);
    box-shadow: var(--shadow-lg);
    background: #000;
    padding: 8px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.social-proof-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--glow-teal);
}

.social-proof-item img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
}

/* ===========================
   Testimonial Cards (text-based)
   =========================== */

.testimonials-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.testimonial-card {
    background: var(--color-bg-medium);
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    position: relative;
    box-shadow: var(--shadow-md);
}

.testimonial-card::before {
    content: '"';
    position: absolute;
    top: -10px;
    left: var(--spacing-lg);
    font-size: 5rem;
    color: var(--color-accent);
    opacity: 0.3;
    line-height: 1;
    font-family: Georgia, serif;
}

.testimonial-text {
    font-style: italic;
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

.testimonial-author {
    font-weight: 700;
    color: var(--color-accent);
    font-size: 0.95rem;
}

/* ===========================
   FAQ Section
   =========================== */

.faq {
    background: var(--color-bg-medium);
    padding: var(--spacing-xxl) 0;
}

.faq h2 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.faq-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    max-width: 780px;
    margin: 0 auto;
}

.faq-item {
    background: var(--color-bg-dark);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--color-accent);
    overflow: hidden;
}

.faq-item summary {
    padding: var(--spacing-md);
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text-primary);
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.3s ease;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--color-accent);
    transition: transform 0.3s ease;
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-item summary:hover {
    background-color: rgba(0, 194, 168, 0.05);
}

.faq-answer {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.faq-answer p {
    margin-bottom: 0;
}

.faq-answer ul {
    margin: var(--spacing-sm) 0;
    padding-left: var(--spacing-xl);
}

.faq-answer ul li {
    margin-bottom: var(--spacing-xs);
}

/* ===========================
   Signup / CTA Section
   =========================== */

.final-cta {
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.final-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(0, 194, 168, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.signup-box {
    max-width: 700px;
    margin: 0 auto;
    text-align: center;
    background: var(--color-bg-medium);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 3px solid var(--color-accent);
    box-shadow: var(--glow-teal);
    position: relative;
}

.signup-box h2 {
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.free-label {
    display: inline-block;
    background: var(--gradient-cta);
    color: var(--color-bg-dark);
    font-weight: 800;
    font-size: 1.1rem;
    padding: 0.4rem 1.5rem;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.05em;
}

.signup-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin: var(--spacing-lg) 0 var(--spacing-md);
}

.form-row {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-input {
    width: 100%;
    padding: 1rem 1.5rem;
    font-size: var(--font-size-lg);
    border: 2px solid var(--color-bg-light);
    border-radius: var(--radius-full);
    background: var(--color-bg-dark);
    color: var(--color-text-primary);
    font-family: var(--font-primary);
    transition: border-color 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 194, 168, 0.2);
}

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

.submit-btn {
    padding: 1rem 2.5rem;
    background: var(--gradient-cta);
    color: var(--color-bg-dark);
    font-size: var(--font-size-lg);
    font-weight: 800;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-family: var(--font-primary);
    transition: all 0.3s ease;
    box-shadow: var(--glow-accent);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 194, 168, 0.6);
}

.form-note {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 0;
    text-align: center;
}

/* ===========================
   Section Intro
   =========================== */

.section-intro {
    text-align: center;
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ===========================
   Footer
   =========================== */

.footer {
    background: var(--color-bg-medium);
    padding: var(--spacing-lg) 0;
    text-align: center;
    border-top: 2px solid var(--color-bg-light);
}

.footer p {
    margin-bottom: 0;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* ===========================
   Sticky CTA Button
   =========================== */

.sticky-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(5, 15, 26, 0.98);
    border-top: 2px solid var(--color-accent);
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: center;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.5);
    z-index: 999;
    transform: translateY(0);
    transition: transform 0.3s ease;
}

.sticky-cta.hidden {
    transform: translateY(100%);
}

.sticky-cta-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    max-width: 1200px;
    margin: 0 auto;
}

.sticky-cta .cta-button {
    display: inline-block;
    padding: 0.75rem 2rem;
    font-size: var(--font-size-base);
}

.sticky-label {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
}

/* ===========================
   Responsive Design
   =========================== */

@media (min-width: 768px) {
    .timeline {
        grid-template-columns: repeat(2, 1fr);
    }

    .timeline-item {
        cursor: default;
    }

    .timeline-item summary {
        cursor: default;
        pointer-events: none;
    }

    .timeline-item summary::after {
        display: none;
    }

    .hero-content {
        display: grid;
        grid-template-columns: 1fr 280px;
        grid-template-areas:
            "text image"
            "benefits image";
        gap: var(--spacing-lg);
        align-items: center;
    }

    .hero-text {
        grid-area: text;
        text-align: left;
    }

    .hero-image {
        grid-area: image;
    }

    .hero-benefits {
        grid-area: benefits;
        margin: 0;
    }

    .hero-subtitle {
        margin-left: 0;
        margin-right: 0;
    }

    .columns {
        grid-template-columns: 1fr 1fr;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .social-proof-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-xl);
    }

    .author-content {
        grid-template-columns: 300px 1fr;
        gap: var(--spacing-xl);
    }

    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .form-row {
        flex-direction: row;
    }

    .form-input {
        flex: 1;
    }
}

@media (min-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .learning-outcomes {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 767px) {
    .hero {
        padding: var(--spacing-lg) 0;
    }

    .hero-content {
        display: flex;
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }

    .hero-content h1 {
        font-size: 1.75rem;
        margin-bottom: var(--spacing-sm);
    }

    .hero-image .author-photo {
        width: 200px;
    }

    .sticky-label {
        display: none;
    }

    .sticky-cta .cta-button {
        width: 100%;
        max-width: 320px;
    }
}

/* ===========================
   Accessibility & Focus
   =========================== */

a:focus,
button:focus,
input:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
}