:root {
            --coral: #F2887A;
            --coral-dark: #E06B5C;
            --ink: #2B2420;
            --paper: #FFFDF9;
            --line: #E8E2D8;
            --muted: #8A8177;
        }

        * { box-sizing: border-box; }

        body {
            margin: 0;
            background: var(--paper);
            color: var(--ink);
            font-family: 'Inter', -apple-system, sans-serif;
        }

        /* ===== HEADER ===== */
        .site-header {
            background: linear-gradient(120deg, var(--coral) 0%, var(--coral-dark) 100%);
            position: relative;
            overflow: hidden;
        }

        .site-header::after {
            content: "{ }";
            position: absolute;
            right: 24px;
            top: 50%;
            transform: translateY(-50%);
            font-family: 'JetBrains Mono', monospace;
            font-weight: 800;
            font-size: 64px;
            color: rgba(255,255,255,0.18);
            pointer-events: none;
        }

        .header-inner {
            max-width: 1100px;
            margin: 0 auto;
            padding: 22px 24px;
            display: flex;
            align-items: center;
            gap: 18px;
        }

        .header-mark {
            font-family: 'JetBrains Mono', monospace;
            font-weight: 800;
            font-size: 34px;
            color: #fff;
            line-height: 1;
            flex-shrink: 0;
        }
        .header-mark span { color: rgba(255,255,255,0.55); }

        .header-text a {
            text-decoration: none;
            color: #fff;
        }

        .header-eyebrow {
            font-family: 'JetBrains Mono', monospace;
            font-size: 11px;
            letter-spacing: 0.14em;
            text-transform: uppercase;
            color: rgba(255,255,255,0.75);
            margin-bottom: 3px;
        }

        .header-title {
            font-family: 'JetBrains Mono', monospace;
            font-weight: 700;
            font-size: 22px;
            letter-spacing: 0.02em;
            color: #fff;
        }

        @media (max-width: 560px) {
            .site-header::after { display: none; }
            .header-title { font-size: 17px; }
        }

        /* ===== PAGE BODY ===== */
        .container.mt-4 {
            padding-top: 0 !important;
        }

        .embed-responsive-16by9 {
            position: relative;
            height: 900px;
            border-radius: 6px;
            margin-top: 24px;
            overflow: hidden; /* clips the pushed-out scrollbar below, without disabling scroll */
        }
        .embed-responsive-16by9 iframe {
            display: block;
            width: calc(100% + 20px); /* extend past the box so the scrollbar lands off-screen */
            height: 100%;
            border: none;
            margin-right: -20px;
        }

        /* ===== FOOTER ===== */
        .site-footer {
            margin-top: 48px;
            border-top: 1px solid var(--line);
            background: #fff;
        }

        .footer-inner {
            max-width: 1100px;
            margin: 0 auto;
            padding: 28px 24px 32px;
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            flex-wrap: wrap;
            gap: 20px;
        }

        .footer-credit-label {
            font-family: 'JetBrains Mono', monospace;
            font-size: 11px;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--muted);
            margin-bottom: 6px;
        }

        .footer-author a {
            color: var(--ink);
            font-weight: 600;
            text-decoration: none;
            border-bottom: 1px solid var(--coral);
        }
        .footer-author a:hover { color: var(--coral-dark); }

        .footer-tutorial {
            font-size: 14px;
            color: var(--muted);
        }
        .footer-tutorial a {
            color: var(--coral-dark);
            text-decoration: none;
            font-weight: 500;
        }
        .footer-tutorial a:hover { text-decoration: underline; }

        .footer-meta {
            font-family: 'JetBrains Mono', monospace;
            font-size: 11px;
            color: var(--muted);
            text-align: right;
        }

        @media (max-width: 560px) {
            .footer-inner { flex-direction: column; }
            .footer-meta { text-align: left; }
        }