/* ========================================
   CSS Variables & Reset
   ======================================== */
:root {
    /* Colors */
    --bg-primary: #fafafa;
    --bg-secondary: #ffffff;
    --bg-alt: #f5f5f5;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --border: #e5e5e5;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-h3: 1.5rem;
    --font-size-h2: 2rem;
    --font-size-h1: 2.5rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 4rem;
    
    /* Layout */
    --max-width: 1200px;
    --header-height: 70px;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

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

/* ========================================
   Layout Utilities
   ======================================== */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

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

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

/* ========================================
   Header & Navigation
   ======================================== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    height: var(--header-height);
    display: flex;
    align-items: center;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.nav-brand a {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.nav-links a:hover,
.nav-links a.nav-highlight {
    color: var(--accent);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: calc(100vh - var(--header-height));
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-color: var(--bg-secondary);
}

.hero h1 {
    font-size: clamp(2rem, 5vw, var(--font-size-h1));
    margin-bottom: var(--spacing-sm);
}

.tagline {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background-color: var(--accent);
    color: white;
    border-radius: 6px;
    font-weight: 500;
    transition: background-color 0.2s ease, transform 0.2s ease;
}

.btn:hover {
    background-color: var(--accent-hover);
    color: white;
    transform: translateY(-2px);
}

/* ========================================
   Story Section
   ======================================== */
.story-content {
    max-width: 800px;
    margin: 0 auto;
}

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

.story-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-md);
}

.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

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

.project-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: var(--spacing-md);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.project-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-xs);
}

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

.project-card .tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.project-links {
    display: flex;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

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

.testimonial-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: var(--spacing-md);
}

.testimonial-card p {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.testimonial-card cite {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
}

/* ========================================
   Calendly Section
   ======================================== */
#calendly {
    min-height: 750px;
}

.calendly-inline-widget {
    min-width: 100%;
    margin: 0 auto;
}

/* ========================================
   Contact Section
   ======================================== */
.contact-content {
    text-align: center;
}

.contact-email {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.social-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

.social-links a {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: var(--font-size-sm);
    background-color: var(--bg-secondary);
}

.social-links a:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* ========================================
   FAQ Section
   ======================================== */
.faq-section {
    text-align: center;
}

.faq-section h1 {
    margin-bottom: var(--spacing-sm);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
}

.faq-item {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
}

.faq-item summary {
    padding: var(--spacing-md);
    cursor: pointer;
    font-weight: 500;
    list-style: none;
    position: relative;
    padding-right: 3rem;
}

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

.faq-item summary::after {
    content: '+';
    position: absolute;
    right: var(--spacing-md);
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--text-secondary);
}

.faq-item[open] summary::after {
    content: '-';
}

.faq-item summary:hover {
    background-color: var(--bg-alt);
}

.faq-item p {
    padding: 0 var(--spacing-md) var(--spacing-md);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* FAQ Contact CTA */
.contact-cta {
    text-align: center;
}

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

.contact-cta .contact-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: var(--spacing-lg) 0;
    text-align: center;
}

.footer p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.footer-attribution {
    margin-top: var(--spacing-xs);
    font-size: 0.75rem;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 3rem;
        --font-size-h1: 2rem;
        --font-size-h2: 1.75rem;
    }
    
    .nav-links {
        gap: var(--spacing-sm);
    }
    
    .nav-links a {
        font-size: 0.75rem;
    }
    
    .projects-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .nav {
        flex-wrap: wrap;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--spacing-xs);
    }
    
    .hero h1 {
        font-size: 1.75rem;
    }
    
    .tagline {
        font-size: var(--font-size-base);
    }
    
    .section {
        padding: var(--spacing-lg) 0;
    }
}