:root {
    --bg-color: #1c1c1e;
    --card-bg: #2c2c2e;
    --text-color: #ffffff;
    --text-secondary: #8e8e93;
    --accent-color: #0a84ff;
}

body {
    font-family: 'SF Pro Display', -apple-system, BlinkMacSystemFont, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    padding-bottom: 80px;
}

header {
    background-color: rgba(44, 44, 46, 0.8);
    backdrop-filter: blur(10px);
    padding: 1rem;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

h1 {
    font-weight: 600;
    font-size: 2rem;
    margin: 0;
}

.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.card {
    background-color: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 12px rgba(0, 0, 0, 0.2);
}

.card h2 {
    font-size: 1.5rem;
    margin: 1rem;
    font-weight: 600;
}

.card p {
    color: var(--text-secondary);
    margin: 0 1rem 1rem;
    font-size: 1rem;
}

.btn {
    display: inline-block;
    background-color: var(--accent-color);
    color: var(--text-color);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    margin: 0 1rem 1rem;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background-color: #0071e3;
}

.detail-container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.detail-container h2 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.detail-container p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.detail-container ul {
    list-style-type: disc;
    padding-left: 1.5rem;
    margin-bottom: 1.5rem;
}

.detail-container ul li {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.button-container {
    display: flex;
    justify-content: flex-start;
    gap: 1rem;
    margin-top: 1.5rem;
}

.btn-demo {
    background-color: #ff9500; /* Orange color for the demo button */
}

.btn-demo:hover {
    background-color: #ff8000;
}

footer {
    position: fixed;
    bottom: 20px;
    left: 20px;
    font-size: 0.9rem;
    line-height: 1.4;
}

.footer-box {
    background-color: #1a1a1a; /* Darker grey color */
    color: var(--text-color);
    padding: 10px 15px;
    border-radius: 8px;
    display: inline-block;
}

footer p {
    margin: 0;
}

footer a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

footer a:hover {
    color: #0071e3;
}