:root {
    --primary-color: #0071e3;
    --text-color: #1d1d1f;
    --text-secondary: #86868b;
    --bg-color: #f5f5f7;
    --card-bg: #ffffff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 40px auto;
    padding: 20px;
}

.card {
    background: var(--card-bg);
    padding: 40px 60px;
    border-radius: 18px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.015em;
}

h2 {
    font-size: 1.5rem;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

h3 {
    font-size: 1.2rem;
    margin-top: 1.5rem;
    font-weight: 600;
}

p,
ul,
li {
    font-size: 1.05rem;
    color: #424245;
}

ul {
    padding-left: 20px;
}

li {
    margin-bottom: 0.5rem;
}

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

a:hover {
    text-decoration: underline;
}

.header-meta {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid #e5e5e5;
    padding-bottom: 2rem;
}

.footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid #e5e5e5;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer a {
    color: var(--text-secondary);
    margin: 0 10px;
}

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

/* Landing Page Specifics */
.hero {
    text-align: center;
    padding: 60px 20px;
}

.hero h1 {
    font-size: 3.5rem;
    background: linear-gradient(135deg, #1d1d1f 0%, #434344 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 10px auto 40px;
}

.contact-box {
    background: #fbfbfd;
    padding: 20px;
    border-radius: 12px;
    border: 1px solid #d2d2d7;
    display: inline-block;
    margin-top: 20px;
}

.nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

.nav-item {
    padding: 20px;
    border-radius: 12px;
    background: #f5f5f7;
    text-align: center;
    font-weight: 600;
    transition: transform 0.2s, background 0.2s;
}

.nav-item:hover {
    transform: translateY(-2px);
    background: #e8e8ed;
    text-decoration: none;
}