:root {
    --bg-color: #F5F7FA;
    --text-color: #1F2937;
    --text-secondary: #64748B;
    --accent-color: #2563EB;
    --border-color: #E2E8F0;
    --font-main: 'Google Sans Flex', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --spacing-unit: 1rem;
    --container-width: 680px;
}

[data-theme="dark"] {
    --bg-color: #0B0F19;
    --text-color: #F3F4F6;
    --text-secondary: #9CA3AF;
    --accent-color: #60A5FA;
    --border-color: #1F2937;
}

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

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding: var(--spacing-unit);
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: var(--container-width);
    margin: 4rem auto;
    padding: 0 1rem;
    animation: fadeIn 0.6s ease-out;
}

/* Header */
.header {
    margin-bottom: 4rem;
    text-align: left;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.header-actions {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

h1 {
    font-weight: 300;
    font-size: 2.5rem;
    letter-spacing: -0.03em;
    color: var(--text-secondary);
    line-height: 1.2;
    margin: 0;
}

h1 .highlight {
    font-weight: 700;
    color: var(--text-color);
}

.last-name {
    display: inline-block;
    font-size: 0.8em;
}

.contact-info {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

.links {
    margin-top: 0.25rem;
}

.intro {
    font-size: 1.1rem;
    color: var(--text-color);
    max-width: 600px;
    line-height: 1.8;
    margin-top: 1.5rem;
}

.intro .highlight {
    font-weight: 600;
    color: var(--text-color);
}

.theme-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
    cursor: pointer;
    padding: 0.4rem 0.6rem;
    border-radius: 20px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background-color: var(--border-color);
}

.theme-icon {
    display: block;
    width: 20px;
    height: 20px;
    transition: all 0.2s;
}

.resume-btn {
    font-size: 0.9rem;
    color: var(--text-color);
    text-decoration: none;
    border: 1px solid var(--border-color);
    padding: 0.5rem 1.25rem;
    border-radius: 20px;
    transition: all 0.2s;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.resume-btn:hover {
    background-color: var(--bg-color);
    border-color: var(--accent-color);
    color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.resume-icon {
    width: 16px;
    height: 16px;
}

.pin-icon {
    width: 14px;
    height: 14px;
    margin-right: 0.25rem;
    vertical-align: middle;
    transform: translateY(-1px);
    display: inline-block;
}

a {
    color: var(--text-color);
    text-decoration: none;
    border-bottom: 1px solid var(--border-color);
    transition: border-color 0.2s, color 0.2s, background-color 0.2s;
}

a:hover {
    color: var(--accent-color);
    border-color: var(--accent-color);
    background-color: rgba(37, 99, 235, 0.05);
    /* Subtle highlight on hover */
    border-radius: 2px;
}

.separator {
    margin: 0 0.5rem;
    color: var(--border-color);
}

/* Sections */
.section {
    margin-bottom: 3rem;
}

h2 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-icon {
    width: 18px;
    height: 18px;
    opacity: 0.7;
}

.location-icon {
    width: 16px;
    height: 16px;
    margin-right: 0.35rem;
    vertical-align: middle;
    transform: translateY(-1px);
    display: inline-block;
}

/* Entries */
.entry {
    margin-bottom: 2rem;
}

.entry-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    margin-bottom: 0.25rem;
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-right: 1rem;
    letter-spacing: -0.02em;
}

.sub-text {
    font-weight: 400;
    color: var(--text-secondary);
    font-size: 1rem;
}

.date {
    font-family: var(--font-main);
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
}

.institution,
.location,
.details {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Holographic Text Effect */
.holo-text {
    background: linear-gradient(90deg,
            #60A5FA 0%,
            #A78BFA 25%,
            #F472B6 50%,
            #A78BFA 75%,
            #60A5FA 100%);
    background-size: 200% auto;
    color: #000;
    /* Fallback */
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: shimmer 3s linear infinite;
    font-weight: 600;
    display: inline-block;
}

@keyframes shimmer {
    to {
        background-position: 200% center;
    }
}

/* Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Mobile Tweaks */
@media (max-width: 600px) {
    .container {
        margin: 2rem auto;
    }

    h1 {
        font-size: 1.75rem;
    }

    .header-top {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .header-actions {
        width: 100%;
        justify-content: flex-start;
    }

    .entry-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .date {
        margin-top: 0.25rem;
        font-size: 0.85rem;
    }
}