/* ===== CSS Variables ===== */
:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent: #3b82f6;
    --accent-hover: #60a5fa;
    --border-color: #2a2a2a;
}

/* ===== Reset & Base Styles ===== */
* {
    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: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    font-size: 16px;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.3;
    margin-bottom: 1rem;
    font-weight: 600;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1.25rem;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

strong {
    font-weight: 600;
}

/* ===== Container ===== */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ===== Navigation ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 1rem 0;
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

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

.nav-link {
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

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

/* ===== Hero Section ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 8rem 0 4rem;
}

.hero-headline {
    font-size: 2.8rem;
    line-height: 1.3;
    margin-bottom: 1.5rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.hero-subheadline {
    font-size: 1.4rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== CTA Button ===== */
.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background-color: var(--accent);
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 6px;
    transition: all 0.3s ease;
    border: 2px solid var(--accent);
}

.cta-button:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

/* ===== Sections ===== */
.section {
    padding: 5rem 0;
    background-color: var(--bg-primary);
}

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

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

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

.highlight {
    color: var(--text-primary);
    margin: 2rem 0;
}

/* ===== Outcomes Grid ===== */
.outcomes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.outcome-card {
    background-color: var(--bg-secondary);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.section-dark .outcome-card {
    background-color: var(--bg-primary);
}

.outcome-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent);
}

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

.outcome-card .duration {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.outcome-card .what-happens {
    margin-bottom: 1rem;
}

.outcome-card .best-for {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===== Two Column Layout ===== */
.two-column {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 2rem;
}

.column h3 {
    color: var(--accent);
    margin-bottom: 1.5rem;
}

.column ul {
    list-style: none;
    padding: 0;
}

.column li {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    line-height: 1.6;
}

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

/* ===== Steps ===== */
.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.step {
    text-align: center;
}

.step-number {
    display: inline-block;
    width: 60px;
    height: 60px;
    background-color: var(--accent);
    color: var(--text-primary);
    font-size: 1.8rem;
    font-weight: 700;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.step h3 {
    margin-bottom: 1rem;
}

.step p {
    color: var(--text-secondary);
    text-align: left;
}

/* ===== Portfolio ===== */
.subsection-title {
    margin-top: 3rem;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.portfolio-item {
    padding: 1.5rem;
    border-left: 3px solid var(--accent);
    background-color: rgba(59, 130, 246, 0.05);
}

.portfolio-item h4 {
    color: var(--accent);
    margin-bottom: 0.75rem;
}

.portfolio-item .learned {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 1rem;
}

blockquote {
    background-color: var(--bg-primary);
    padding: 2rem;
    margin: 2rem 0;
    border-left: 4px solid var(--accent);
    font-style: italic;
    color: var(--text-secondary);
}

.section-dark blockquote {
    background-color: var(--bg-secondary);
}

blockquote cite {
    display: block;
    margin-top: 1rem;
    font-size: 0.9rem;
    font-style: normal;
}

/* ===== CTA Section ===== */
.cta-section {
    text-align: center;
    padding: 6rem 0;
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.cta-text {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.cta-section p {
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    color: var(--text-secondary);
}

.cta-section .cta-button {
    margin-top: 2rem;
}

/* ===== Footer ===== */
.footer {
    background-color: var(--bg-secondary);
    padding: 3rem 0 1.5rem;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-bottom: 0;
}

.footer-contact p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.footer-contact a {
    color: var(--text-secondary);
}

.footer-contact a:hover {
    color: var(--accent);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin: 0;
}

.location {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

/* ===== Mobile Responsiveness ===== */
@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
        font-size: 0.85rem;
    }

    .hero {
        padding: 6rem 0 3rem;
    }

    .hero-headline {
        font-size: 1.8rem;
    }

    .hero-subheadline {
        font-size: 1.1rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.6rem;
    }

    h3 {
        font-size: 1.3rem;
    }

    .section {
        padding: 3rem 0;
    }

    .outcomes-grid,
    .portfolio-grid,
    .steps {
        grid-template-columns: 1fr;
    }

    .two-column {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .cta-button {
        padding: 0.875rem 2rem;
        font-size: 1rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

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

@media (max-width: 480px) {
    .nav-menu {
        display: none;
    }

    .hero-headline {
        font-size: 1.5rem;
    }

    .hero-subheadline {
        font-size: 1rem;
    }

    .container {
        padding: 0 1rem;
    }
}

/* ===== Secret Version Toggle ===== */
.version-toggle {
    text-align: center;
    padding: 2rem 0 1rem;
    margin-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.toggle-trigger {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem 1rem;
    transition: all 0.2s ease;
    letter-spacing: 2px;
}

.toggle-trigger:hover {
    color: var(--accent);
}

.toggle-options {
    margin-top: 1rem;
    display: flex;
    gap: 0.75rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.toggle-label {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-right: 0.5rem;
}

.version-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.4rem 1rem;
    font-size: 0.85rem;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.version-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.version-btn.active {
    background-color: var(--accent);
    border-color: var(--accent);
    color: white;
}