.res-nav {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--bg-primary);
            border-bottom: 1px solid var(--border-color);
        }

        .res-nav-inner {
            max-width: 1200px;
            margin: 0 auto;
            padding: 1rem 2rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .res-nav .back-link {
            font-family: var(--font-mono);
            font-size: 0.75rem;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--text-secondary);
            text-decoration: none;
        }

        .res-nav .back-link:hover {
            color: var(--accent-primary);
        }

        .res-wrap {
            max-width: 1080px;
            margin: 0 auto;
            padding: 4rem 2rem 5rem;
            display: grid;
            grid-template-columns: 1.15fr 1fr;
            gap: 4rem;
            align-items: start;
        }

        .res-kicker {
            font-family: var(--font-mono);
            font-size: 0.72rem;
            letter-spacing: 0.22em;
            text-transform: uppercase;
            color: var(--accent-primary);
            margin-bottom: 1.25rem;
        }

        .res-info h1 {
            font-size: clamp(2rem, 4vw, 2.9rem);
            line-height: 1.1;
            margin-bottom: 1.25rem;
        }

        .res-info .res-lead {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin-bottom: 2.5rem;
            max-width: 46ch;
        }

        .res-inside h2 {
            font-size: 0.8rem;
            font-family: var(--font-mono);
            letter-spacing: 0.14em;
            text-transform: uppercase;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }

        .res-inside ul {
            list-style: none;
            padding: 0;
            margin: 0 0 2rem;
        }

        .res-inside li {
            position: relative;
            padding-left: 1.5rem;
            margin-bottom: 0.6rem;
            font-size: 0.92rem;
            color: var(--text-secondary);
        }

        .res-inside li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0.55em;
            width: 6px;
            height: 6px;
            background: var(--accent-primary);
            border-radius: 50%;
        }

        .res-meta {
            font-size: 0.82rem;
            color: var(--text-tertiary);
            font-family: var(--font-mono);
            border-top: 1px solid var(--border-color);
            padding-top: 1.25rem;
        }

        .res-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 2.25rem;
            position: sticky;
            top: 6rem;
        }

        .res-card h2 {
            font-size: 1.25rem;
            margin-bottom: 0.4rem;
        }

        .res-card .sub {
            font-size: 0.88rem;
            color: var(--text-secondary);
            margin-bottom: 1.75rem;
        }

        .res-form {
            display: flex;
            flex-direction: column;
            gap: 0.85rem;
        }

        .res-form .row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0.85rem;
        }

        .res-form input[type="text"],
        .res-form input[type="email"] {
            width: 100%;
            padding: 0.8rem 0.9rem;
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: 4px;
            color: var(--text-primary);
            font-family: var(--font-body);
            font-size: 0.95rem;
            transition: border-color 0.2s;
        }

        .res-form input:focus {
            outline: none;
            border-color: var(--accent-primary);
        }

        .res-consent {
            display: flex;
            gap: 0.6rem;
            align-items: flex-start;
            font-size: 0.78rem;
            color: var(--text-secondary);
            line-height: 1.5;
            margin-top: 0.35rem;
        }

        .res-consent input {
            margin-top: 0.15rem;
            accent-color: var(--accent-primary);
        }

        .res-consent a {
            color: var(--accent-primary);
        }

        .res-submit {
            margin-top: 0.5rem;
            width: 100%;
            padding: 0.95rem;
            background: var(--accent-primary);
            color: #fff;
            border: none;
            border-radius: 4px;
            font-family: var(--font-mono);
            font-size: 0.82rem;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            cursor: pointer;
            transition: background 0.2s;
        }

        .res-submit:hover {
            background: var(--accent-hover);
        }

        .res-submit:disabled {
            opacity: 0.6;
            cursor: default;
        }

        .res-hp {
            position: absolute;
            left: -9999px;
            width: 1px;
            height: 1px;
            overflow: hidden;
        }

        .res-done {
            display: none;
            text-align: center;
        }

        .res-done .tick {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(13, 148, 136, 0.12);
            color: var(--accent-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            font-size: 1.3rem;
        }

        .res-done h2 {
            margin-bottom: 0.5rem;
        }

        .res-done p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }

        .res-done a.dl {
            font-family: var(--font-mono);
            font-size: 0.8rem;
            color: var(--accent-primary);
        }

        .res-foot {
            border-top: 1px solid var(--border-color);
            text-align: center;
            padding: 2rem;
            font-size: 0.8rem;
            color: var(--text-tertiary);
        }

        .res-foot a {
            color: var(--text-secondary);
        }

        @media (max-width: 860px) {
            .res-wrap {
                grid-template-columns: 1fr;
                gap: 2.5rem;
                padding: 2.5rem 1.5rem 4rem;
            }

            .res-card {
                position: static;
            }
        }

        /* ---------- Resources hub (/resources) ---------- */
        .hub-wrap {
            max-width: 1080px;
            margin: 0 auto;
            padding: 4.5rem 2rem 3rem;
        }

        .hub-wrap .res-kicker {
            margin-bottom: 1rem;
        }

        .hub-wrap h1 {
            font-size: clamp(2rem, 4vw, 3rem);
            line-height: 1.1;
            margin-bottom: 1rem;
        }

        .hub-wrap .hub-lead {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 60ch;
        }

        .hub-grid {
            max-width: 1080px;
            margin: 0 auto;
            padding: 0 2rem 5rem;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }

        .hub-card {
            display: flex;
            flex-direction: column;
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 1.75rem;
            text-decoration: none;
            color: inherit;
            transition: border-color 0.2s, transform 0.2s;
        }

        .hub-card:hover {
            border-color: var(--accent-primary);
            transform: translateY(-2px);
        }

        .hub-card .kicker {
            font-family: var(--font-mono);
            font-size: 0.68rem;
            letter-spacing: 0.16em;
            text-transform: uppercase;
            color: var(--accent-primary);
            margin-bottom: 0.75rem;
        }

        .hub-card h2 {
            font-size: 1.2rem;
            line-height: 1.25;
            margin-bottom: 0.6rem;
        }

        .hub-card p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-bottom: 1.25rem;
            flex: 1;
        }

        .hub-card .meta {
            font-family: var(--font-mono);
            font-size: 0.72rem;
            color: var(--text-tertiary);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .hub-card .meta .go {
            color: var(--accent-primary);
        }

        @media (max-width: 720px) {
            .hub-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ---------- Ungated topic pages (/guides/*) ---------- */
        .topic-wrap {
            max-width: 760px;
            margin: 0 auto;
            padding: 3.5rem 1.5rem 4rem;
        }

        .topic-wrap .res-kicker {
            margin-bottom: 1rem;
        }

        .topic-wrap h1 {
            font-size: clamp(1.9rem, 3.8vw, 2.7rem);
            line-height: 1.12;
            margin-bottom: 1.25rem;
        }

        .topic-intro {
            font-size: 1.08rem;
            line-height: 1.6;
            color: var(--text-secondary);
            margin-bottom: 2rem;
        }

        .topic-toc {
            position: relative;
            z-index: 1;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            padding: 1.25rem 1.5rem;
            margin-bottom: 3rem;
            background: var(--bg-secondary);
        }

        .topic-toc h2 {
            font-family: var(--font-mono);
            font-size: 0.68rem;
            letter-spacing: 0.16em;
            text-transform: uppercase;
            color: var(--text-tertiary);
            margin-bottom: 0.75rem;
        }

        .topic-toc ol {
            margin: 0;
            padding-left: 1.1rem;
            font-size: 0.92rem;
        }

        .topic-toc li {
            margin-bottom: 0.4rem;
        }

        .topic-toc a {
            color: var(--accent-primary);
            text-decoration: none;
        }

        .topic-toc a:hover {
            text-decoration: underline;
        }

        /* .topic-section is a <section>; override the global "section { padding: 8rem 0 }" in style.css */
        .topic-wrap .topic-section {
            padding: 0;
            margin: 0 0 2.5rem;
            scroll-margin-top: 5rem;
        }

        .topic-section h2 {
            font-size: 1.35rem;
            line-height: 1.25;
            margin-bottom: 0.9rem;
        }

        .topic-section p {
            margin-bottom: 1rem;
            line-height: 1.68;
        }

        .topic-section ul {
            margin: 0 0 1rem 1.25rem;
            line-height: 1.6;
        }

        .topic-section li {
            margin-bottom: 0.4rem;
        }

        .topic-cta {
            border: 1px solid var(--accent-primary);
            border-radius: 8px;
            padding: 2rem;
            margin: 3.5rem 0 2rem;
            background: var(--wash-teal, #f0fbfa);
        }

        .topic-cta h2 {
            font-size: 1.25rem;
            margin-bottom: 0.5rem;
        }

        .topic-cta p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 1.25rem;
        }

        .topic-cta .btn-row {
            display: flex;
            gap: 0.75rem;
            flex-wrap: wrap;
        }

        .topic-cta a.primary {
            display: inline-block;
            padding: 0.85rem 1.5rem;
            background: var(--accent-primary);
            color: #fff;
            text-decoration: none;
            border-radius: 4px;
            font-family: var(--font-mono);
            font-size: 0.8rem;
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }

        .topic-cta a.primary:hover {
            background: var(--accent-hover);
        }

        .topic-cta a.secondary {
            display: inline-block;
            padding: 0.85rem 1.25rem;
            color: var(--accent-primary);
            text-decoration: none;
            font-family: var(--font-mono);
            font-size: 0.8rem;
            letter-spacing: 0.05em;
            text-transform: uppercase;
        }

        .topic-cta a.secondary:hover {
            text-decoration: underline;
        }