/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color palette - Deep Teal Theme */
    --primary: #0d3d3d;        /* Deeper teal-gray for headers */
    --secondary: #196373;      /* Your exact teal for accents */
    --accent: #ff6b6b;         /* Coral accent for contrast */
    --text-dark: #2d3436;
    --text-light: #636e72;
    --background: #ffffff;
    --background-alt: #f8fafa;
    --border: #e0e5e5;
    --teal-light: #2a8a99;     /* Lighter version for hover states */
    
    /* Typography */
    --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Monaco', 'Courier New', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Layout */
    --max-width: 1200px;
    --border-radius: 8px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--background);
}

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

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4 {
    line-height: 1.2;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

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

h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--secondary);
}

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

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

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

/* ===== HEADER & NAVIGATION ===== */
header {
    background-color: var(--background);
    border-bottom: 2px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

nav {
    padding: var(--spacing-sm) 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin: 0;
}

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

.nav-links a {
    color: var(--text-dark);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: background-color 0.3s ease;
}

.nav-links a:hover {
    background-color: var(--background-alt);
    color: var(--secondary);
}

/* ===== HERO SECTION ===== */
#hero {
    background: linear-gradient(135deg, #0d4d4d 0%, #196373 50%, #2a8a99 100%);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
}

#hero h1 {
    color: white;
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

#hero h2 {
    color: white;
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

#hero .tagline {
    font-size: 1.3rem;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

#hero .intro {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.9);
    max-width: 800px;
    margin: 0 auto;
}

/* ===== ABOUT SECTION ===== */
#about .about-text {
    max-width: 900px;
    margin: 0 auto;
}

#about h2 {
    padding-left: 7.5rem;
}

#about p {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

#about h3 {
    font-size: 2rem;
    font-weight: 600;
    color: var(--primary);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

#about p strong {
    color: var(--secondary);
    font-weight: 600;
}

/* ===== SECTIONS ===== */
section {
    padding: var(--spacing-xl) 0;
}

section:nth-child(even) {
    background-color: var(--background-alt);
}

.section-intro {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-lg);
    text-align: left;
}
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.expertise-card {
    background-color: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.expertise-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.expertise-card h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.5rem;
}

.expertise-card p {
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
}

.card-link {
    color: var(--secondary);
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: color 0.3s ease;
}

.card-link:hover {
    color: var(--teal-light);
}

/* ===== CORE EXPERTISE SECTION ===== */
.case-study-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.case-study {
    background-color: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.case-study:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.case-study h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
}

.case-study .company {
    color: var(--secondary);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.case-study .challenge,
.case-study .approach,
.case-study .outcome {
    margin-bottom: var(--spacing-md);
}

.case-study h4 {
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
}

.case-study ul {
    margin-left: var(--spacing-md);
    color: var(--text-light);
}

.case-study li {
    margin-bottom: var(--spacing-xs);
}

.case-study-note {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    background-color: var(--background-alt);
    border-left: 3px solid var(--secondary);
    font-size: 0.95rem;
}

.case-study-note a {
    font-weight: 600;
    text-decoration: none;
}

.case-study-note a:hover {
    text-decoration: underline;
}

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

.skill-tag {
    background-color: rgba(0, 137, 123, 0.1);
    color: var(--secondary);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid rgba(0, 137, 123, 0.3);
}

/* ===== DOCUMENTATION SAMPLES ===== */
.samples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.sample {
    background-color: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.sample:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.sample h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.sample-description {
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
}

.sample-links {
    list-style: none;
    margin-bottom: var(--spacing-sm);
}

.sample-links li {
    margin-bottom: var(--spacing-xs);
    padding-left: var(--spacing-sm);
    position: relative;
}

.sample-links li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--secondary);
}

.sample-links a {
    color: var(--secondary);
    text-decoration: none;
    font-weight: 500;
}

.sample-links a:hover {
    text-decoration: underline;
}

.sample-note {
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: italic;
    margin-top: var(--spacing-sm);
}

.sample-note a {
    color: var(--secondary);
    text-decoration: none;
    font-weight: 500;
}

.sample-note a:hover {
    text-decoration: underline;
}

/* ===== CONTACT SECTION ===== */
#contact {
    text-align: center;
}

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

.contact-content p {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

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

.contact-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--secondary);
    color: white;
    border-radius: var(--border-radius);
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.contact-link:hover {
    background-color: var(--teal-light);
    color: white;
    transform: translateY(-2px);
}

.contact-link svg {
    width: 24px;
    height: 24px;
}

/* ===== FOOTER ===== */
footer {
    background-color: var(--primary);
    color: white;
    text-align: center;
    padding: var(--spacing-md) 0;
}

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

/* ===== DETAIL PAGES ===== */
#detail-page {
    padding: var(--spacing-xl) 0;
}

#detail-page h1 {
    margin-bottom: var(--spacing-sm);
}

.intro-text {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.case-study-detail {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border);
}

.case-study-detail:last-of-type {
    border-bottom: none;
}

.case-study-detail h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-xs);
    margin-top: 0;
}

.case-study-detail p {
    margin-bottom: var(--spacing-xs);
}

/* Screenshot layouts */
.screenshot-single {
    margin: var(--spacing-sm) 0;
}

.screenshot-single img {
    width: 100%;
    height: auto;
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Add width control via inline max-width style */

.screenshots-side-by-side {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin: var(--spacing-sm) 0;
}

.screenshot-half {
    width: 100%;
}

.screenshot-half img {
    width: 100%;
    height: auto;
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.screenshots-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin: var(--spacing-sm) 0;
}

.screenshot-quarter {
    width: 100%;
}

.screenshot-quarter img {
    width: 100%;
    height: auto;
    border: 1px solid var(--border);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.caption {
    font-size: 0.9rem;
    color: var(--text-light);
    font-style: italic;
    margin-top: var(--spacing-xs);
    text-align: left;
}

.download-link {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-sm);
    background-color: var(--background-alt);
    border-left: 3px solid var(--secondary);
}

.download-link a {
    color: var(--secondary);
    font-weight: 600;
    text-decoration: none;
}

.download-link a:hover {
    text-decoration: underline;
}

#detail-page h2 {
    margin-left: 0;
    padding-left: 0;
}

.impact-list {
    list-style: none;
    margin: var(--spacing-md) 0 0 0;
    padding: 0;
}

.impact-list li {
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.impact-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: bold;
}

/* ===== CORE EXPERTISE SKILLS GRID ===== */
.expertise-skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md) var(--spacing-lg);
    margin-top: var(--spacing-md);
}

.expertise-skill-group h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--secondary);
    margin-bottom: var(--spacing-xs);
    text-transform: none;
    letter-spacing: 0;
}

.expertise-skill-group ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.expertise-skill-group ul li {
    padding-left: 1.2rem;
    position: relative;
    margin-bottom: 0.3rem;
    color: var(--text-light);
    font-size: 0.95rem;
}

.expertise-skill-group ul li::before {
    content: "–";
    position: absolute;
    left: 0;
    color: var(--secondary);
}

@media (max-width: 768px) {
    .expertise-skills-grid {
        grid-template-columns: 1fr;
    }
}

/* Index page: hide logo, center nav links */
.logo-placeholder {
    width: 0;
}


@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 0;
        padding: var(--spacing-sm) var(--spacing-md);
        align-items: center;
    }
    
    .logo {
        font-size: 1.25rem;
        text-align: center;
    }
    
    .nav-links {
        display: none;
    }
    
    #hero {
        padding: var(--spacing-lg) 0;
    }
    
    #hero h2 {
        font-size: 1.75rem;
    }
    
    #hero .tagline {
        font-size: 1rem;
    }
    
    #hero .intro {
        font-size: 1rem;
    }
    
    h1 {
        font-size: 1.75rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .expertise-grid {
        grid-template-columns: 1fr;
    }
    
    .case-study-grid {
        grid-template-columns: 1fr;
    }
    
    .samples-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-links {
        flex-direction: column;
        align-items: center;
    }
    
    .screenshots-side-by-side {
        grid-template-columns: 1fr;
    }
    
    .screenshots-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    :root {
        --spacing-md: 1rem;
        --spacing-lg: 2rem;
        --spacing-xl: 2.5rem;
    }
    
    .expertise-card,
    .case-study,
    .sample {
        padding: var(--spacing-sm);
    }
    
    .screenshots-grid {
        grid-template-columns: 1fr;
    }
}