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

:root {
    --primary-color: #1a1a1a;
    --secondary-color: #666;
    --accent-color: #8b8b8b;
    --background-color: #fefefe;
    --paper-color: #f9f9f9;
    --border-color: #e5e5e5;
    --max-width: 800px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

body {
    font-family:
        "Satoshi-Regular",
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        sans-serif;
    line-height: 1.6;
    color: var(--primary-color);
    background-color: var(--background-color);
    font-size: 16px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navigation */
.nav {
    background-color: var(--background-color);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.nav-brand a {
    font-family: "Satoshi-Medium", sans-serif;
    font-size: 1.1rem;
    color: var(--primary-color);
    text-decoration: none;
    letter-spacing: -0.01em;
}

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

.nav-menu a {
    color: var(--secondary-color);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s ease;
    position: relative;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-menu a::after {
    content: "";
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--primary-color);
    transition: width 0.2s ease;
}

.nav-menu a:hover::after {
    width: 100%;
}

/* Main Content */
.main-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
    flex: 1;
}

.main-content-centered {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
    flex: 1;
    display: flex;
    align-items: center;
}

/* Hero Section */
.hero {
    margin-bottom: var(--spacing-xl);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-text h1 {
    font-family: "Satoshi-Medium", sans-serif;
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-family: "Satoshi-LightItalic", sans-serif;
    font-size: 1.1rem;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-lg);
}

.hero-description {
    display: flex;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--primary-color);
}

.hero-description p {
    margin-bottom: var(--spacing-md);
}

.hero-description p:last-child {
    margin-bottom: 0;
}

/* Image Placeholder */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.image-placeholder {
    width: 300px;
    height: 400px;
    background-color: var(--paper-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
    font-family: "Satoshi-Light", sans-serif;
    font-size: 0.9rem;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.image-placeholder:hover {
    background-color: var(--border-color);
    border-color: var(--accent-color);
}

.image-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 4px;
    border: none;
}

/* Content Sections */
.content-section {
    margin-bottom: var(--spacing-xl);
}

.content-section h2 {
    font-family: "Satoshi-Medium", sans-serif;
    font-size: 1.8rem;
    margin-bottom: var(--spacing-lg);
    color: var(--primary-color);
    letter-spacing: -0.01em;
}

.content-section h3 {
    font-family: "Satoshi-Medium", sans-serif;
    font-size: 1.2rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-color);
}

.content-section p {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.content-section ul {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.content-section li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.6;
}

/* Experience/Certification Items */
.item {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.item-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: var(--spacing-sm);
}

.item-title {
    font-family: "Satoshi-Medium", sans-serif;
    font-size: 1.1rem;
    color: var(--primary-color);
}

.item-meta {
    font-size: 0.9rem;
    color: var(--secondary-color);
    font-style: italic;
}

.item-subtitle {
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
}

.item-description {
    line-height: 1.6;
}

/* Credential Links */
.credential-link {
    color: var(--secondary-color);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-left: var(--spacing-md);
    font-size: 0.9rem;
    transition: color 0.2s ease;
    border: 1px solid var(--border-color);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    background-color: var(--paper-color);
}

.credential-link:hover {
    color: var(--primary-color);
    background-color: var(--border-color);
}

.external-link-icon {
    font-size: 0.8rem;
    opacity: 0.6;
    transition: opacity 0.2s ease;
}

.credential-link:hover .external-link-icon {
    opacity: 1;
}

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

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 var(--spacing-sm);
    }

    .nav-menu {
        gap: var(--spacing-md);
    }

    .main-content {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }

    .hero-text h1 {
        font-size: 2rem;
    }

    .item-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
}

@media (max-width: 480px) {
    .hero-text h1 {
        font-size: 1.8rem;
    }

    .image-placeholder {
        width: 100 %;
        height: 100%;
    }

    .image-placeholder img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        border-radius: 2px;
    }

    .nav-menu {
        gap: var(--spacing-sm);
    }

    .nav-menu a {
        font-size: 0.9rem;
    }
}