:root {
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --primary: #2563eb;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --font-family: 'Inter', system-ui, sans-serif;
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    margin: 0;
}

header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

.header-button {
    font-weight: 800;
    font-size: 1.25rem;
    color: var(--text-main);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
}

.nav-link:hover {
    color: var(--primary);
}

#project-details-toggle {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-family: var(--font-family);
    font-weight: 500;
}

main {
    flex: 1;
    display: flex;
    justify-content: center;
    padding: 40px 20px;
}

.container {
    width: 100%;
    max-width: 600px;
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
}

h1 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: var(--text-main);
    letter-spacing: -0.5px;
}

p {
    margin-bottom: 1.5rem;
    line-height: 1.7;
    color: var(--text-muted);
}

/* Footer & project details styles omitted for brevity, would match styles.css */
/* Ensure footer appears correctly */
footer {
    padding: 2rem;
    text-align: center;
    color: var(--text-muted);
}