:root {
    --primary-bg: #0F172A;
    --secondary-bg: #1E293B;
    --accent-blue: #3B82F6;
    --text-main: #F8FAFC;
    --text-muted: #94A3B8;
    --border-color: #334155;
    --card-bg: #111827;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--primary-bg);
    color: var(--text-main);
    line-height: 1.6;
    font-size: 16px;
}

header {
    background-color: rgba(15, 23, 42, 0.9);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
    text-decoration: none;
    letter-spacing: -0.025em;
}

.logo span {
    color: var(--accent-blue);
}

nav {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color 0.2s;
}

nav a:hover {
    color: var(--text-main);
}

.btn-primary {
    background-color: var(--accent-blue);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    transition: opacity 0.2s;
}

.btn-primary:hover {
    opacity: 0.9;
}

main {
    max-width: 1000px;
    margin: 4rem auto;
    padding: 0 2rem;
}

.hero {
    text-align: center;
    margin-bottom: 4rem;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.05em;
}

.hero p {
    color: var(--text-muted);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 2rem;
    border-left: 4px solid var(--accent-blue);
    padding-left: 1rem;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 2rem;
    margin-bottom: 2rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

footer {
    border-top: 1px solid var(--border-color);
    padding: 4rem 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-muted);
}

input, textarea, select {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    color: var(--text-main);
    font-family: inherit;
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
}

/* Technical Blocks */
pre {
    background-color: #000;
    padding: 1.5rem;
    border-radius: 0.5rem;
    overflow-x: auto;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
}

code {
    color: var(--accent-blue);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--accent-blue);
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
}