:root {
    --primary-bg: #0F172A;
    --accent-color: #F59E0B;
    --text-main: #E2E8F0;
    --text-muted: #94A3B8;
    --sidebar-bg: #1E293B;
    --border-color: #334155;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
    background-color: var(--primary-bg);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.6;
    display: flex;
    min-height: 100vh;
}

/* Sidebar Navigation */
aside {
    width: 280px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    padding: 2rem 1.5rem;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

aside .brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 2.5rem;
    letter-spacing: -0.025em;
}

aside nav ul {
    list-style: none;
}

aside nav ul li {
    margin-bottom: 0.75rem;
}

aside nav ul li a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s;
    display: block;
    padding: 0.5rem 0;
}

aside nav ul li a:hover, aside nav ul li a.active {
    color: var(--text-main);
}

/* Main Content Area */
main {
    margin-left: 280px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

header {
    height: 70px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 0 3rem;
    background-color: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 10;
}

.btn-verification {
    background-color: var(--accent-color);
    color: #000;
    padding: 0.6rem 1.2rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: opacity 0.2s;
}

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

.content-wrapper {
    max-width: 900px;
    padding: 4rem 3rem;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: #fff;
}

h2 {
    font-size: 1.5rem;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

p {
    margin-bottom: 1.25rem;
    color: var(--text-muted);
}

.technical-block {
    background-color: #1e293b;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.5rem;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.9rem;
    color: #cbd5e1;
    margin: 1.5rem 0;
    overflow-x: auto;
}

footer {
    margin-top: auto;
    padding: 3rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.card {
    background-color: #1e293b;
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    border-radius: 8px;
}

.card h3 {
    color: #fff;
    margin-bottom: 0.5rem;
}