/* Base styles for PanelCheck website */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.5;
    color: #f0f0f0;
    background-color: #0a0a0a;
    padding: 0;
    margin: 0;
}

/* Top navigation */
.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #333333;
    background-color: #0a0a0a;
}

.wordmark {
    font-size: 1.5rem;
    font-weight: 600;
    color: #ffffff;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    color: #88c0ff;
    text-decoration: none;
    font-size: 1rem;
    padding: 0.25rem 0;
    transition: opacity 0.2s ease;
}

.nav-links a:hover {
    opacity: 0.8;
}

main {
    max-width: 700px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

header {
    text-align: center;
    margin-bottom: 2.5rem;
    padding-top: 1rem;
}

h1 {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
    line-height: 1.2;
}

.tagline {
    font-size: 1.5rem;
    font-weight: 400;
    color: #88c0ff;
    margin-bottom: 2rem;
    line-height: 1.4;
}

p {
    margin-bottom: 1.25rem;
    font-size: 1.125rem;
    color: #e0e0e0;
    line-height: 1.6;
}

section {
    margin-bottom: 2.5rem;
}

h2 {
    font-size: 1.375rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    color: #ffffff;
    line-height: 1.4;
}

.visual-demo {
    margin: 2.5rem 0;
    text-align: center;
}

.pattern-grid {
    display: grid;
    grid-template-columns: repeat(10, 1fr);
    gap: 2px;
    margin-bottom: 1.5rem;
    height: 30px;
    border: 1px solid #333333;
    padding: 2px;
    border-radius: 2px;
}

.pattern-cell {
    background-color: #000;
}

.gray-0 { background-color: #000000; }
.gray-1 { background-color: #111111; }
.gray-2 { background-color: #222222; }
.gray-3 { background-color: #333333; }
.gray-4 { background-color: #444444; }
.gray-5 { background-color: #555555; }
.gray-6 { background-color: #666666; }
.gray-7 { background-color: #777777; }
.gray-8 { background-color: #888888; }
.gray-9 { background-color: #999999; }

.rgb-demo {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

.rgb-color {
    width: 30px;
    height: 30px;
    border-radius: 4px;
    box-shadow: 0 0 2px rgba(255, 255, 255, 0.2);
}

.red { background-color: #ff0000; }
.green { background-color: #00ff00; }
.blue { background-color: #0000ff; }

.links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 2.5rem;
    flex-wrap: wrap;
}

a {
    color: #88c0ff;
    text-decoration: none;
    font-size: 1.125rem;
    padding: 0.375rem 1rem;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

a:hover {
    background-color: #333333;
}

footer {
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
    border-top: 1px solid #333333;
    color: #888888;
    font-size: 0.9rem;
}

/* Responsive adjustments */
@media (max-width: 600px) {
    main {
        padding: 1.5rem 1rem;
    }

    h1 {
        font-size: 2.25rem;
    }

    .tagline {
        font-size: 1.25rem;
    }

    p {
        font-size: 1rem;
        line-height: 1.5;
    }

    h2 {
        font-size: 1.25rem;
    }

    .pattern-grid {
        height: 20px;
    }

    .rgb-demo {
        gap: 0.75rem;
    }

    .rgb-color {
        width: 24px;
        height: 24px;
    }

    .links {
        gap: 1rem;
    }

    a {
        font-size: 1rem;
        padding: 0.3rem 0.8rem;
    }
}