:root {
    /* Colors - Light Mode (Default) */
    --bg-color: #fdfbf7;
    /* Warm white */
    --text-primary: #2d3436;
    --text-secondary: #636e72;
    --accent-color: #f05627;
    --badge-color: #636e72;
    --border-color: #e0e0e0;
    --card-hover: rgba(0, 0, 0, 0.02);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-size-base: 0.95rem;
    /* 15px */
    --line-height-relaxed: 1.6;
    --line-height-heading: 1.2;

    /* Transitions */
    --transition-standard: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

[data-theme="dark"] {
    --bg-color: #111111;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent-color: #7e87da;
    --badge-color: #7e87da;
    --border-color: #333333;
    --card-hover: rgba(255, 255, 255, 0.03);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.5s ease, color 0.5s ease;
}

/* Layout */
.container {
    max-width: 1000px;
    /* Increased width for side-by-side layout */
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

section {
    margin-bottom: var(--spacing-xl);
    opacity: 0;
    /* For fade-in animation */
    transform: translateY(20px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

/* Side-by-side layout for non-hero sections on desktop */
@media (min-width: 768px) {

    section:not(#hero) {
        display: grid;
        grid-template-columns: 180px 1fr;
        gap: var(--spacing-md);
        align-items: start;
    }
}

section.visible,
.site-footer.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Footer */
.site-footer {
    margin-top: var(--spacing-xl);
    /* More space before copyright */
    margin-bottom: var(--spacing-md);
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

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

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
}

.email-link {
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.email-link:hover {
    color: var(--accent-color);
}

.social-link {
    font-size: 0.95rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.social-link:hover {
    color: var(--accent-color);
}

.copyright {
    font-size: 0.85rem;
    color: var(--text-secondary);
    opacity: 0.7;
    max-width: 100%;
    margin: 0 auto;
}

/* Typography */
h1,
h2,
h3 {
    font-weight: 600;
    line-height: var(--line-height-heading);
    color: var(--text-primary);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent-color);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    margin-top: 0.25rem;
    /* Optical alignment with body text */
}

h3 {
    font-size: 1.25rem;
    font-weight: 500;
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
    max-width: 65ch;
    /* Optimal reading length */
}

a {
    color: var(--text-primary);
    text-decoration: none;
    position: relative;
    transition: var(--transition-standard);
}

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

/* Hero Section */
#hero {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding-top: var(--spacing-xl);
}

.greeting {
    color: var(--accent-color);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    font-size: 1rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.accent-emoji {
    display: inline-block;
    animation: wave 2s infinite;
    transform-origin: 70% 70%;
}

@keyframes wave {
    0% {
        transform: rotate(0deg);
    }

    10% {
        transform: rotate(14deg);
    }

    20% {
        transform: rotate(-8deg);
    }

    30% {
        transform: rotate(14deg);
    }

    40% {
        transform: rotate(-4deg);
    }

    50% {
        transform: rotate(10deg);
    }

    60% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(0deg);
    }
}

/* Marquee Section */
.marquee-wrapper {
    max-width: 800px;
    margin: var(--spacing-xl) auto;
    position: relative;
    opacity: 0;
    animation: fadeInMarquee 0.8s ease-out 2.5s forwards;
}

@keyframes fadeInMarquee {
    to {
        opacity: 1;
    }
}

.marquee-row {
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
    mask-image: linear-gradient(to right, transparent, black 5%, black 95%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, black 5%, black 95%, transparent);
}

.marquee-track {
    display: flex;
    white-space: nowrap;
    gap: var(--spacing-md);
    width: max-content;
    animation: marquee-scroll 18s linear infinite;
    padding: 0.25rem var(--spacing-md) 0.25rem 0;
    will-change: transform;
}

.marquee-row.reverse .marquee-track {
    animation-direction: reverse;
}

.marquee-item {
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.25rem 0;
    /* Removed horizontal padding */
}

[data-theme="dark"] .marquee-item {
    background-color: transparent;
    /* Ensure no background in dark mode */
}

.marquee-row:hover .marquee-track {
    animation-play-state: paused;
}

@keyframes marquee-scroll {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-50%);
    }
}

.footer-text {
    font-family: 'Libre Baskerville', Georgia, serif;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    opacity: 0.7;
}

/* Skills Section */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6rem;
}

.skill-category h3 {
    margin-bottom: 1.25rem;
    /* Slightly more space under header */
    color: var(--text-primary);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.skill-category li {
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    line-height: 1.4;
    padding-left: 0;
}

/* Experience Section */
.experience-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.job-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    /* Aligns tags with the top (Company) line */
    padding: 0.5rem 0;
    transition: var(--transition-standard);
}

.job-item:first-child {
    padding-top: 0;
}

.job-item:hover {
    transform: translateX(5px);
}

.job-main {
    display: flex;
    flex-direction: column;
    /* Stacked layout */
    gap: 0.1rem;
}

.job-company {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.2;
    position: relative;
}

.job-company::before {
    content: '';
    position: absolute;
    left: -14px;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: #b0b0b0;
}

.job-company.current-role::before {
    background-color: var(--accent-color);
}

.job-title {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.job-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: flex-end;
    max-width: 50%;
    margin-top: 0.1rem;
    /* Optical alignment */
}

.tag {
    font-size: 0.75rem;
    /* Smaller tags */
    font-family: var(--font-sans);
    color: var(--badge-color);
    background: rgba(0, 0, 0, 0.03);
    padding: 0.1rem 0.5rem;
    border-radius: 4px;
    white-space: nowrap;
    letter-spacing: 0.02em;
}

[data-theme="dark"] .tag {
    background-color: rgba(255, 255, 255, 0.05);
}

/* Projects Section */
.projects-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

.project-item {
    background-color: var(--bg-color);
    padding: var(--spacing-md);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    transition: var(--transition-standard);
    height: 100%;
}

[data-theme="dark"] .project-item {
    background-color: var(--bg-color);
    border-color: var(--border-color);
}

.project-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px -15px rgba(0, 0, 0, 0.1);
    border-color: var(--accent-color);
}

.project-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.6;
    flex-grow: 1;
}

.project-footer {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 0.5rem;
    margin-top: auto;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.project-icon {
    font-size: 1.5rem;
    color: var(--text-secondary);
    opacity: 0.5;
    flex-shrink: 0;
}

.project-tag {
    font-size: 0.75rem;
    font-family: var(--font-sans);
    color: var(--badge-color);
    background: rgba(0, 0, 0, 0.03);
    padding: 0.1rem 0.5rem;
    border-radius: 4px;
    white-space: nowrap;
    letter-spacing: 0.02em;
    border: none;
}

[data-theme="dark"] .project-tag {
    background-color: rgba(255, 255, 255, 0.05);
}

/* Theme Toggle */
.theme-toggle-wrapper {
    position: fixed;
    top: var(--spacing-md);
    right: var(--spacing-md);
    z-index: 100;
}

#theme-toggle {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    padding: 0.5rem;
    border-radius: 50%;
    transition: background-color 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

#theme-toggle:hover {
    background-color: var(--card-hover);
}

/* Hide/Show Icons based on theme */
.sun-icon,
.moon-icon {
    font-size: 1.4rem;
}

.sun-icon {
    display: none;
}

.moon-icon {
    display: block;
}

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

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

/* Mobile Adjustments */
@media (max-width: 600px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 3rem;
        --spacing-xl: 5rem;
    }

    h1 {
        font-size: 2.5rem;
    }

    .job-item {
        flex-direction: column;
        gap: 0.5rem;
    }

    .job-tags {
        justify-content: flex-start;
        max-width: 100%;
        margin-top: 0;
    }

    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .project-icon {
        display: none;
    }

    .job-company::before {
        display: none;
    }

    .job-company::after {
        content: '';
        display: inline-block;
        width: 6px;
        height: 6px;
        border-radius: 50%;
        background-color: #b0b0b0;
        margin-left: 0.4rem;
        vertical-align: middle;
        position: relative;
        top: -1px;
    }

    .job-company.current-role::after {
        background-color: var(--accent-color);
    }
}

@media (max-width: 400px) {
    .skills-grid {
        grid-template-columns: 1fr;
    }
}