:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --heading-color: #111111;
    --accent-color: #0056b3; /* Professional Blue */
    --secondary-color: #666666;
    --border-color: #e0e0e0;
    --spacing-unit: 1rem;
    --container-width: 800px;
    --font-main: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}

* {
    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;
}

h1, h2, h3 {
    color: var(--heading-color);
    margin-bottom: 0.5em;
    font-weight: 600;
}

h1 { font-size: 2.5rem; letter-spacing: -0.02em; }
h2 { font-size: 1.75rem; margin-top: 2em; border-bottom: 1px solid var(--border-color); padding-bottom: 0.5rem; }
h3 { font-size: 1.25rem; margin-top: 1.5em; }

p { margin-bottom: 1em; }
ul { margin-bottom: 1em; padding-left: 1.5em; }
li { margin-bottom: 0.25em; }

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    text-decoration: underline;
}

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

/* Hero Section */
.hero {
    padding: 4rem 0;
    text-align: center;
}

.tagline {
    font-size: 1.25rem;
    color: var(--secondary-color);
    margin-bottom: 2rem;
}

.disclaimer {
    font-size: 0.9rem;
    color: #d9534f; /* A subtle red/orange for attention */
    font-style: italic;
    margin-bottom: 1rem;
    margin-top: -0.5rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease;
}

.btn-primary {
    background-color: var(--heading-color);
    color: #fff;
    border: 1px solid var(--heading-color);
}

.btn-primary:hover {
    background-color: #333;
    text-decoration: none;
}

.btn-secondary {
    background-color: transparent;
    color: var(--heading-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--heading-color);
    text-decoration: none;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.skill-category h3 {
    margin-top: 0;
    font-size: 1.1rem;
    color: var(--secondary-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

/* Experience & Projects */
.job, .project, .volunteer-work {
    margin-bottom: 2rem;
}

.job-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
}

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

.role {
    font-weight: 500;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

/* Contact Form */
.contact-form {
    max-width: 500px;
    margin-top: 1.5rem;
}

.form-group {
    margin-bottom: 1rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

input, textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

/* Footer */
footer {
    margin-top: 4rem;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--secondary-color);
    font-size: 0.9rem;
}

.social-links {
    margin-top: 0.5rem;
}

.social-links a {
    margin: 0 0.5rem;
    color: var(--secondary-color);
}

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

/* Responsive */
@media (max-width: 600px) {
    h1 { font-size: 2rem; }
    .hero-actions { flex-direction: column; }
    .job-header { flex-direction: column; }
}