/* Caskaydia Cove Nerd Font */
@font-face {
    font-family: 'CaskaydiaCove NF';
    src: url('../fonts/CaskaydiaCoveNerdFont-Regular.ttf') format('truetype');
    font-weight: 400;
    font-style: normal;
}

@font-face {
    font-family: 'CaskaydiaCove NF';
    src: url('../fonts/CaskaydiaCoveNerdFont-Bold.ttf') format('truetype');
    font-weight: 700;
    font-style: normal;
}

@font-face {
    font-family: 'CaskaydiaCove NF';
    src: url('../fonts/CaskaydiaCoveNerdFont-Light.ttf') format('truetype');
    font-weight: 300;
    font-style: normal;
}

:root {
    /* Light theme colors */
    --light-text: #1a1a1a;
    --light-text-muted: #666;
    --light-text-light: #9ca3af;
    --light-bg: #ffffff;
    --light-nav-bg: rgba(255, 255, 255, 0.95);
    --light-border: #e5e5e5;
    --light-border-light: #d1d5db;
    --light-border-medium: #9ca3af;
    --light-border-dark: #6b7280;
    --light-card-bg: #f3f4f6;
    --light-card-text: #1f2937;
    --light-star-empty: #ddd;
    
    /* Dark theme colors (GitHub style) */
    --dark-text: #c9d1d9;
    --dark-text-muted: #8b949e;
    --dark-text-light: #6e7681;
    --dark-bg: #0d1117;
    --dark-nav-bg: rgba(13, 17, 23, 0.95);
    --dark-border: #30363d;
    --dark-border-light: #21262d;
    --dark-border-medium: #30363d;
    --dark-border-dark: #484f58;
    --dark-card-bg: #161b22;
    --dark-card-text: #c9d1d9;
    --dark-star-empty: #30363d;
    
    /* Active theme colors */
    --color-text: var(--light-text);
    --color-text-muted: var(--light-text-muted);
    --color-text-light: var(--light-text-light);
    --color-bg: var(--light-bg);
    --color-nav-bg: var(--light-nav-bg);
    --color-border: var(--light-border);
    --color-border-light: var(--light-border-light);
    --color-border-medium: var(--light-border-medium);
    --color-border-dark: var(--light-border-dark);
    --color-card-bg: var(--light-card-bg);
    --color-card-text: var(--light-card-text);
    --color-star-empty: var(--light-star-empty);
    
    /* Typography */
    --font-mono: 'CaskaydiaCove NF', 'Courier New', Courier, monospace;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    
    /* Border radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.75rem;
    
    /* Transitions */
    --transition-fast: 0.2s;
    --transition-medium: 0.5s;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-text: var(--dark-text);
        --color-text-muted: var(--dark-text-muted);
        --color-text-light: var(--dark-text-light);
        --color-bg: var(--dark-bg);
        --color-nav-bg: var(--dark-nav-bg);
        --color-border: var(--dark-border);
        --color-border-light: var(--dark-border-light);
        --color-border-medium: var(--dark-border-medium);
        --color-border-dark: var(--dark-border-dark);
        --color-card-bg: var(--dark-card-bg);
        --color-card-text: var(--dark-card-text);
        --color-star-empty: var(--dark-star-empty);
    }
}

:root[data-theme="dark"] {
    --color-text: var(--dark-text);
    --color-text-muted: var(--dark-text-muted);
    --color-text-light: var(--dark-text-light);
    --color-bg: var(--dark-bg);
    --color-nav-bg: var(--dark-nav-bg);
    --color-border: var(--dark-border);
    --color-border-light: var(--dark-border-light);
    --color-border-medium: var(--dark-border-medium);
    --color-border-dark: var(--dark-border-dark);
    --color-card-bg: var(--dark-card-bg);
    --color-card-text: var(--dark-card-text);
    --color-star-empty: var(--dark-star-empty);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 7rem;
}

body {
    font-family: var(--font-sans);
    line-height: 1.75;
    color: var(--color-text);
    background: var(--color-bg);
    padding: var(--space-lg) var(--space-md);
}

.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--color-nav-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-md);
    z-index: 100;
    backdrop-filter: blur(8px);
    transition: background var(--transition-fast);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--space-xs);
    cursor: pointer;
    color: var(--color-text);
    width: 36px;
    height: 36px;
}

.menu-toggle svg {
    width: 24px;
    height: 24px;
}

.nav-links {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
    flex: 1;
}

.main-nav a {
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.main-nav a:hover {
    background: var(--color-card-bg);
    transform: translateY(-1px);
}

.main-nav a:focus {
    outline: 2px solid var(--color-text);
    outline-offset: 2px;
}

.theme-toggle {
    background: none;
    border: 1px solid var(--color-border-medium);
    border-radius: var(--radius-sm);
    padding: var(--space-xs);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    transition: all var(--transition-fast);
    width: 36px;
    height: 36px;
    flex-shrink: 0;
}

.theme-toggle:hover {
    background: var(--color-card-bg);
    border-color: var(--color-border-dark);
    transform: translateY(-1px);
}

.theme-toggle:focus {
    outline: 2px solid var(--color-text);
    outline-offset: 2px;
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
}

.theme-toggle .sun-icon {
    display: none;
}

.theme-toggle .moon-icon {
    display: block;
}

:root[data-theme="dark"] .theme-toggle .sun-icon {
    display: block;
}

:root[data-theme="dark"] .theme-toggle .moon-icon {
    display: none;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-toggle .sun-icon {
        display: block;
    }
    
    :root:not([data-theme="light"]) .theme-toggle .moon-icon {
        display: none;
    }
}

a {
    color: var(--color-text);
    text-decoration-color: var(--color-text);
}

main {
    max-width: 50rem;
    margin: 0 auto;
    margin-top: 7rem;
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-sm);
}

.header-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    flex: 1;
}

h1 {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
}

.subtitle {
    font-size: 1rem;
    line-height: 1.5;
    font-weight: 700;
}

.header-details {
    display: flex;
    flex-direction: column-reverse;
    gap: var(--space-xs);
    margin-top: var(--space-sm);
}

.contact-row {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    color: var(--color-text);
}

.username-row {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-mono);
    line-height: 1;
}

.username-row svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.username-row a {
    color: var(--color-text);
    text-decoration: none;
}

.username-row a:hover {
    text-decoration: underline;
    text-decoration-color: var(--color-text);
}

.social-links {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.social-links a {
    display: flex;
    gap: var(--space-sm);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border-medium);
    padding: var(--space-sm);
    align-items: center;
    color: var(--color-text);
    text-decoration: none;
    transition: all var(--transition-fast);
}

.social-links a:hover {
    border-color: var(--color-border-dark);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.social-links svg {
    width: 16px;
    height: 16px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.social-links a:last-child svg {
    fill: currentColor;
    stroke: none;
    stroke-width: 0;
}

.location-row {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.location-row svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.location-row a {
    color: var(--color-text);
    text-decoration: none;
}

.location-row a:hover {
    text-decoration: underline;
    text-decoration-color: var(--color-text);
}

.avatar {
    display: none;
}

section {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    border-top: 1px solid var(--color-border);
    padding-top: var(--space-xl);
    margin-top: var(--space-lg);
}

section:first-of-type {
    border-top: none;
    padding-top: 0;
    margin-top: 0;
}

h2 {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
}

h2 a {
    color: var(--color-text);
    text-decoration: none;
}

.section-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.experience-item {
    display: flex;
    flex-direction: column;
}

.experience-header {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    font-family: var(--font-mono);
    margin-bottom: var(--space-sm);
}

.company-row {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.company-row h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text);
}

.company-row h3 a {
    color: var(--color-text);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
}

.company-row h3 a:hover {
    text-decoration: underline;
    text-decoration-color: var(--color-text);
}

.external-link-icon {
    width: 14px;
    height: 14px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.position {
    font-size: 1rem;
    font-weight: 700;
}

.date {
    font-size: 0.875rem;
}

ul {
    margin-top: var(--space-sm);
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

li {
    display: flex;
    align-items: flex-start;
    line-height: 1.5;
}

li span.bullet {
    margin-right: var(--space-sm);
    color: var(--color-text-light);
}

section[aria-labelledby="certifications"] a {
    text-decoration: none;
}

section[aria-labelledby="certifications"] a:hover {
    text-decoration: underline;
    text-decoration-color: var(--color-text);
}

.skills-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

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

.skills-row h3 {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: var(--space-xs);
}

.skills-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.skill-tag {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border-light);
    background: var(--color-card-bg);
    padding: var(--space-xs) 0.625rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-card-text);
    white-space: nowrap;
}

.education-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.education-item h3 {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 700;
}

.education-item h3 a {
    color: var(--color-text);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
}

.education-item h3 a:hover {
    text-decoration: underline;
    text-decoration-color: var(--color-text);
}

.languages-list {
    list-style: none;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.languages-list li {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.language-name {
    font-weight: 600;
    min-width: 5rem;
}

.language-level {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    min-width: 4rem;
}

.stars {
    display: flex;
    gap: 0.125rem;
    font-size: 1.125rem;
    line-height: 1;
}

.star {
    color: var(--color-star-empty);
    transition: all var(--transition-fast);
    cursor: default;
}

.star:hover {
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    transform: scale(1.1);
}

.star.filled {
    color: var(--color-text);
}

.languages-list li span.bullet {
    display: none;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-md);
}

.course-card {
    padding: var(--space-md);
    padding-right: calc(var(--space-md) * 2.5);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    transition: all var(--transition-fast);
    text-decoration: none;
    display: block;
    position: relative;
}

.course-card:hover {
    border-color: var(--color-text);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transform: translateY(-2px);
}

.course-card > .external-link-icon {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    width: 1rem;
    height: 1rem;
    stroke: var(--color-text-muted);
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.course-title {
    font-weight: 500;
    margin-bottom: var(--space-sm);
    color: var(--color-text);
    padding-right: 0;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-md);
}

.course-provider,
.course-year {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin: 0;
}

.course-year {
    font-weight: 500;
    white-space: nowrap;
}

.project-description {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.5;
    margin: 0 0 var(--space-sm) 0;
}

.course-card h3.course-title {
    margin-bottom: var(--space-xs);
    font-size: 1rem;
}

.course-card h3.course-title a {
    color: var(--color-text);
    text-decoration: none;
}

.course-card h3.course-title a:hover {
    text-decoration: underline;
}

@media (max-width: 639px) {
    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .nav-links {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--color-nav-bg);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        padding: var(--space-md);
        gap: var(--space-sm);
        display: none;
        max-height: calc(100vh - 60px);
        overflow-y: auto;
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        width: 100%;
        text-align: left;
        padding: var(--space-sm) var(--space-md);
    }

    main {
        margin-top: 4rem;
    }
}

@media (min-width: 640px) {
    body {
        line-height: 1.5;
    }

    main {
        gap: var(--space-xl);
    }

    section {
        gap: var(--space-md);
    }

    .header-details {
        flex-direction: column;
    }

    .contact-row {
        flex-direction: row;
        align-items: center;
        gap: var(--space-md);
    }

    .social-links a {
        padding: 0.125rem;
    }

    .skills-row {
        flex-direction: row;
        gap: var(--space-md);
    }

    .skills-row h3 {
        min-width: 5.5rem;
        flex-shrink: 0;
    }
}

@media (min-width: 768px) {
    body {
        padding: 3rem 4rem;
    }

    .username-row svg,
    .location-row svg {
        width: 16px;
        height: 16px;
    }

    .avatar {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .avatar img {
        width: 7rem;
        height: 7rem;
        aspect-ratio: 1;
        border-radius: var(--radius-md);
        object-fit: cover;
        transition: transform var(--transition-medium);
    }

    .avatar img:hover {
        transform: scale(1.05);
    }

    .company-row {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
        gap: var(--space-md);
    }

    .company-row .company-info {
        flex: 1;
    }

    .company-row .date {
        flex-shrink: 0;
        font-size: 0.875rem;
    }
}

@media print {
    body {
        line-height: 1.25;
        padding: var(--space-md);
    }

    main {
        max-width: 100%;
    }

    .social-links a {
        border-radius: 0;
        border: none;
    }

    .avatar {
        display: block;
    }

    .external-link-icon {
        display: none;
    }
}