:root {
    --bg-color: #fbfbfb;
    --text-primary: #2b2b2b;
    --text-secondary: #5a5a5a;
    --accent-primary: #526f7a; /* Muted slate blue */
    --accent-hover: #3d5660;
    --white: #ffffff;
    --border-color: #ececec;
    --card-bg: #ffffff;
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
    --transition: all 0.3s ease;
    --font-family: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
    font-weight: 400;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 {
    font-size: 3rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2.25rem;
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: var(--transition);
}

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

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Header */
header {
    background-color: var(--white);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

header.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-primary);
    font-size: 0.95rem;
}

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

.btn {
    display: inline-block;
    background-color: var(--accent-primary);
    color: var(--white);
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    font-size: 0.95rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn:hover {
    background-color: var(--accent-hover);
    transform: translateY(-2px);
    color: var(--white);
}

/* Hero Section */
.hero {
    padding: 6rem 0;
    background-color: var(--white);
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 600px;
}

.hero h1 {
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}

.hero-image img {
    max-width: 100%;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    object-fit: cover;
    max-height: 500px;
}

/* Sections */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
    max-width: 700px;
    margin-inline: auto;
}

/* Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

/* Cards */
.card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--accent-primary);
}

/* About Section */
.about-section {
    background-color: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-image img {
    width: 100%;
    border-radius: 8px;
}

.credentials-list {
    list-style: none;
    margin-top: 1.5rem;
}

.credentials-list li {
    padding-left: 1.5rem;
    position: relative;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.credentials-list li::before {
    content: '•';
    color: var(--accent-primary);
    position: absolute;
    left: 0;
    font-size: 1.2rem;
}

/* Footer */
footer {
    background-color: var(--text-primary);
    color: var(--white);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h4 {
    color: var(--white);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.footer-col p, .footer-col a {
    color: #a0a0a0;
    font-size: 0.95rem;
}

.footer-col a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid #444;
    padding-top: 2rem;
    text-align: center;
    color: #a0a0a0;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    h1 { font-size: 2.25rem; }
    .hero { flex-direction: column; text-align: center; padding: 4rem 0; }
    .hero-image { margin-top: 3rem; justify-content: center; }
    .about-grid { grid-template-columns: 1fr; }
    .nav-links { display: none; } /* Add hamburger menu logic later if needed */
}