:root {
    --obsidian: #0A0A0A;
    --vibrant-red: #EE152E;
    --slate-grey: #2D2D2D;
    --light-grey: #A0A0A0;
    --white: #FFFFFF;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

body {
    background-color: var(--obsidian);
    color: var(--white);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Header & Navigation */
header {
    background: rgba(10, 10, 10, 0.95);
    border-bottom: 1px solid var(--slate-grey);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.logo {
    font-weight: 800;
    font-size: 1.2rem;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo span {
    color: var(--vibrant-red);
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    text-decoration: none;
    color: var(--light-grey);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

nav a:hover, nav a.active {
    color: var(--vibrant-red);
}

.header-cta {
    background-color: var(--vibrant-red);
    color: var(--white);
    padding: 0.6rem 1.2rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
    transition: transform 0.2s ease, background-color 0.3s ease;
}

.header-cta:hover {
    background-color: #d11228;
    transform: translateY(-1px);
}

/* Layout Structures */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.main-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 3rem;
    padding: 3rem 0;
}

/* Sidebar Navigation */
.sidebar {
    position: sticky;
    top: 100px;
    height: calc(100vh - 150px);
}

.sidebar h3 {
    font-size: 0.75rem;
    color: var(--light-grey);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 1.5rem;
    border-left: 3px solid var(--vibrant-red);
    padding-left: 10px;
}

.sidebar-nav {
    list-style: none;
}

.sidebar-nav li {
    margin-bottom: 0.5rem;
}

.sidebar-nav a {
    text-decoration: none;
    color: var(--light-grey);
    font-size: 0.95rem;
    display: block;
    padding: 0.5rem 0;
    transition: color 0.2s ease;
}

.sidebar-nav a:hover, .sidebar-nav a.active {
    color: var(--white);
    font-weight: 600;
}

/* Content Components */
h1 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

h2 {
    font-size: 1.8rem;
    margin-bottom: 1.2rem;
    border-bottom: 1px solid var(--slate-grey);
    padding-bottom: 0.5rem;
}

p {
    margin-bottom: 1.5rem;
    color: var(--light-grey);
    font-size: 1.05rem;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(238, 21, 46, 0.1);
    color: var(--vibrant-red);
    padding: 4px 10px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    border: 1px solid rgba(238, 21, 46, 0.3);
    margin-bottom: 1rem;
}

.status-badge::before {
    content: '';
    width: 8px;
    height: 8px;
    background-color: var(--vibrant-red);
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 8px var(--vibrant-red);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.tech-card {
    background: #111;
    border: 1px solid var(--slate-grey);
    padding: 2rem;
    border-radius: 8px;
    transition: border-color 0.3s ease;
}

.tech-card:hover {
    border-color: var(--vibrant-red);
}

.tech-card h4 {
    color: var(--white);
    margin-bottom: 1rem;
    font-family: var(--font-mono);
}

.code-block {
    background: #000;
    padding: 1rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: #00ff41;
    border-left: 2px solid var(--vibrant-red);
    margin: 1rem 0;
    overflow-x: auto;
}

/* Footer */
footer {
    border-top: 1px solid var(--slate-grey);
    padding: 4rem 2rem;
    margin-top: 4rem;
    text-align: center;
    color: var(--light-grey);
    font-size: 0.85rem;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-links a {
    color: var(--light-grey);
    text-decoration: none;
}

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

/* Responsive */
@media (max-width: 1024px) {
    .main-layout {
        grid-template-columns: 1fr;
    }
    .sidebar {
        display: none;
    }
}