:root {
    --bg: #121417;
    --panel: #1d2228;
    --panel-soft: #262d35;
    --text: #e0e0e0;
    --muted: #aab2bd;
    --accent: #ff6600;
    --primary: #4682b4;
    --border: #343c45;
    --shadow: rgba(0, 0, 0, 0.4);
    --display-font: "Oswald", "Franklin Gothic Medium", "Arial Narrow", "Impact", sans-serif;
    --body-font: "IBM Plex Sans", "Source Sans Pro", "Segoe UI", "Arial", sans-serif;
}

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

body {
    font-family: var(--body-font);
    color: var(--text);
    background-color: var(--bg);
    background-image:
        radial-gradient(circle at top, rgba(70, 130, 180, 0.18), transparent 55%),
        radial-gradient(circle at 70% 20%, rgba(255, 102, 0, 0.12), transparent 45%),
        linear-gradient(180deg, rgba(0, 0, 0, 0.2), transparent 40%);
    min-height: 100vh;
}

.page {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2.5rem 1.5rem 3rem;
}

.header {
    background: var(--panel);
    border: 1px solid var(--border);
    padding: 2rem;
    text-align: center;
    box-shadow: 0 12px 24px var(--shadow);
}

.header h1 {
    font-family: var(--display-font);
    font-size: clamp(2.4rem, 4vw, 3.4rem);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 0.6rem;
}

.header .subtitle {
    color: var(--muted);
    font-size: 1rem;
}

.nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem;
    margin: 1.8rem 0 2rem;
}

.nav a {
    text-decoration: none;
    color: var(--text);
    border: 1px solid var(--border);
    padding: 0.45rem 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.75rem;
    background: var(--panel-soft);
}

.section {
    background: var(--panel);
    border: 1px solid var(--border);
    padding: 1.6rem;
    margin-bottom: 1.8rem;
    box-shadow: 0 10px 20px var(--shadow);
}

.section h2 {
    font-family: var(--display-font);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 0.8rem;
    color: var(--primary);
}

.section p {
    line-height: 1.6;
    margin-bottom: 0.8rem;
    color: var(--text);
}

.grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
    background: var(--panel-soft);
    border: 1px solid var(--border);
    padding: 1rem;
}

.card h3 {
    font-family: var(--display-font);
    text-transform: uppercase;
    font-size: 1rem;
    letter-spacing: 1px;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.badge {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border: 1px solid var(--accent);
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.7rem;
    margin-bottom: 0.6rem;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.table th,
.table td {
    border: 1px solid var(--border);
    padding: 0.6rem;
    text-align: left;
}

.table th {
    background: rgba(70, 130, 180, 0.15);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 1px;
}

.code {
    background: #0e1115;
    border: 1px dashed var(--accent);
    padding: 0.8rem 1rem;
    font-family: "Courier New", Courier, monospace;
    font-size: 0.85rem;
    white-space: pre-wrap;
}

.highlight {
    color: var(--accent);
}

.footer {
    text-align: center;
    color: var(--muted);
    font-size: 0.85rem;
    margin-top: 2rem;
}

.back-link {
    display: inline-block;
    margin-top: 0.8rem;
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px solid var(--accent);
}

@media (max-width: 720px) {
    .page {
        padding: 2rem 1rem 2.5rem;
    }

    .header {
        padding: 1.6rem;
    }
}

.nav a.active {
    border-color: var(--accent);
    color: var(--accent);
}

.mode-switch {
    margin-top: 1rem;
    display: inline-flex;
    border: 1px solid var(--border);
    background: var(--panel-soft);
    overflow: hidden;
}

.mode-tab {
    text-decoration: none;
    color: var(--muted);
    padding: 0.45rem 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.75rem;
    border-right: 1px solid var(--border);
}

.mode-tab:last-child {
    border-right: none;
}

.mode-tab.active {
    background: rgba(255, 102, 0, 0.15);
    color: var(--accent);
}

.mode-tab:hover {
    color: var(--text);
}