:root {
        --bg: #f4f7f3;
        --bg-soft: #edf3ed;
        --surface: #ffffff;
        --surface-alt: #f8fbf8;
        --line: #d7e1d4;
        --line-strong: #b5c7b2;
        --text: #173224;
        --text-soft: #486152;
        --muted: #6f8577;
        --primary: #1f5a3f;
        --primary-strong: #184a33;
        --primary-soft: #e4efe7;
        --accent: #8ea86c;
        --accent-soft: #eff4e7;
        --gold: #b78b3f;
        --shadow-sm: 0 8px 22px rgba(23, 50, 36, 0.06);
        --shadow-md: 0 18px 40px rgba(23, 50, 36, 0.08);
        --radius-xl: 24px;
        --radius-lg: 18px;
        --radius-md: 14px;
        --container: 1180px;
      }

      * {
        box-sizing: border-box;
      }

      html {
        scroll-behavior: smooth;
      }

      body {
        margin: 0;
        font-family: "Public Sans", sans-serif;
        color: var(--text);
        background:
          linear-gradient(180deg, rgba(142, 168, 108, 0.08), transparent 260px),
          linear-gradient(180deg, #f7faf7 0%, var(--bg) 100%);
        overflow-x: hidden;
      }

      body.menu-open {
        overflow: hidden;
      }

      h1,
      h2,
      h3,
      h4,
      h5,
      h6 {
        margin: 0;
        line-height: 1.08;
        letter-spacing: -0.03em;
      }

      h1,
      h2,
      h3 {
        font-family: "Merriweather", serif;
      }

      p {
        margin: 0;
      }

      a {
        color: inherit;
        text-decoration: none;
      }

      img {
        display: block;
        width: 100%;
        height: 100%;
        object-fit: cover;
      }

      button,
      input,
      textarea,
      select {
        font: inherit;
      }

      button {
        cursor: pointer;
      }

      .container {
        width: min(calc(100% - 40px), var(--container));
        margin: 0 auto;
      }

      .eyebrow {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        font-family: "IBM Plex Mono", monospace;
        text-transform: uppercase;
        letter-spacing: 0.14em;
        font-size: 11px;
        color: var(--primary);
      }

      .eyebrow::before {
        content: "";
        width: 28px;
        height: 1px;
        background: currentColor;
        opacity: 0.6;
      }

      .headline-xl {
        font-size: clamp(2.9rem, 6vw, 5.4rem);
      }

      .headline-lg {
        font-size: clamp(2rem, 3.8vw, 3.45rem);
      }

      .body-text {
        color: var(--text-soft);
        font-size: clamp(1rem, 1.15vw, 1.08rem);
        line-height: 1.75;
      }

      .site-header {
        position: sticky;
        top: 0;
        z-index: 1000;
        padding: 0;
        background: rgba(247, 250, 247, 0.94);
        backdrop-filter: blur(10px);
        border-bottom: 1px solid transparent;
        transition: border-color 0.25s ease, box-shadow 0.25s ease, background 0.25s ease;
      }

      .site-header.is-scrolled {
        border-bottom-color: var(--line);
        box-shadow: 0 8px 24px rgba(23, 50, 36, 0.06);
        background: rgba(247, 250, 247, 0.98);
      }

      .site-nav {
        min-height: 78px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 18px;
      }

      .brand {
        display: flex;
        align-items: center;
        gap: 14px;
        min-width: 0;
      }

      .brand-mark {
        width: 124px;
        height: 84px;
        border-radius: 18px;
        background: transparent;
        border: none;
        display: grid;
        place-items: center;
        flex-shrink: 0;
        overflow: hidden;
      }

      .brand-mark img {
        width: 100%;
        height: 100%;
        object-fit: contain;
        filter: none;
      }

      .brand-copy {
        min-width: 0;
      }

      .brand-kicker {
        font-family: "IBM Plex Mono", monospace;
        font-size: 10px;
        letter-spacing: 0.16em;
        text-transform: uppercase;
        color: var(--muted);
      }

      .brand-title {
        font-size: 0.9rem;
        font-weight: 700;
        color: var(--text);
        line-height: 1.2;
      }

      .nav-links {
        display: none;
        align-items: center;
        gap: 4px;
      }

      .nav-links a {
        padding: 10px 12px;
        border-radius: 10px;
        font-size: 0.95rem;
        color: var(--text-soft);
        transition: background 0.2s ease, color 0.2s ease;
      }

      .nav-links a:hover,
      .nav-links a.is-active {
        background: var(--primary-soft);
        color: var(--primary-strong);
      }

      .nav-actions {
        display: flex;
        align-items: center;
        gap: 10px;
      }

      .nav-cta {
        display: none;
      }

      .nav-toggle {
        width: 44px;
        height: 44px;
        border-radius: 12px;
        border: 1px solid var(--line);
        background: #fff;
        color: var(--primary-strong);
        display: inline-flex;
        align-items: center;
        justify-content: center;
      }

      .mobile-menu {
        position: fixed;
        inset: 0;
        z-index: 900;
        background: rgba(24, 43, 31, 0.28);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: opacity 0.24s ease, visibility 0.24s ease;
      }

      .mobile-menu.is-open {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
      }

      .mobile-menu-panel {
        width: min(calc(100% - 24px), 420px);
        margin: 88px auto 0;
        padding: 22px;
        border-radius: 22px;
        background: #ffffff;
        border: 1px solid var(--line);
        box-shadow: var(--shadow-md);
      }

      .mobile-menu-links {
        display: grid;
        gap: 8px;
      }

      .mobile-menu-links a {
        padding: 14px 16px;
        border-radius: 12px;
        background: var(--surface-alt);
        color: var(--text);
        font-size: 1rem;
      }

      .mobile-menu-footer {
        margin-top: 18px;
        display: grid;
        gap: 10px;
      }

      .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 10px;
        min-height: 46px;
        padding: 0 18px;
        border-radius: 12px;
        border: 1px solid transparent;
        font-size: 0.95rem;
        font-weight: 600;
        transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease,
        background 0.2s ease, color 0.2s ease;
      }

      .btn:hover {
        transform: translateY(-1px);
      }

      .btn-primary {
        color: #ffffff;
        background: var(--primary);
        box-shadow: 0 8px 18px rgba(31, 90, 63, 0.18);
      }

      .btn-primary:hover {
        background: var(--primary-strong);
      }

      .btn-secondary {
        border-color: var(--line-strong);
        color: var(--primary-strong);
        background: #ffffff;
      }

      .btn-secondary:hover {
        border-color: var(--primary);
        background: var(--primary-soft);
      }

      .btn-block {
        width: 100%;
      }

      .icon {
        width: 20px;
        height: 20px;
        stroke: currentColor;
        fill: none;
        stroke-width: 2;
        stroke-linecap: round;
        stroke-linejoin: round;
      }

      .hero {
        position: relative;
        min-height: 78vh;
        display: flex;
        align-items: center;
        padding: 96px 0;
        color: #f7fbf7;
        overflow: hidden;
      }

      .hero-media {
        position: absolute;
        inset: 0;
        z-index: 0;
      }

      .hero-media video {
        width: 100%;
        height: 100%;
        object-fit: cover;
      }

      .hero-media::after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(
          120deg,
          rgba(16, 41, 28, 0.85),
          rgba(16, 41, 28, 0.45) 45%,
          rgba(16, 41, 28, 0.15)
        );
      }

      .hero-content {
        position: relative;
        z-index: 1;
        max-width: 660px;
        display: grid;
        gap: 20px;
      }

      .hero .eyebrow {
        color: rgba(231, 246, 235, 0.9);
      }

      .hero .body-text {
        color: rgba(236, 245, 237, 0.88);
      }

      .hero .btn-secondary {
        color: #f6fbf6;
        border-color: rgba(236, 245, 237, 0.55);
        background: rgba(20, 52, 36, 0.35);
      }

      .hero .btn-secondary:hover {
        border-color: #f6fbf6;
        background: rgba(20, 52, 36, 0.55);
      }

      .hero-shell {
        border: 1px solid var(--line);
        border-radius: 28px;
        background: linear-gradient(180deg, #ffffff 0%, #f6faf6 100%);
        box-shadow: var(--shadow-md);
        overflow: hidden;
      }

      .hero-grid {
        display: grid;
        gap: 0;
        align-items: stretch;
      }

      .hero-copy {
        display: flex;
        flex-direction: column;
        justify-content: center;
        gap: 22px;
        padding: 42px;
      }

      .hero-copy p {
        max-width: 62ch;
      }

      .hero-actions {
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
      }

      .hero-highlights {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 12px;
        margin-top: 8px;
      }

      .highlight-card {
        padding: 16px;
        border-radius: 14px;
        background: var(--surface-alt);
        border: 1px solid var(--line);
      }

      .highlight-card strong {
        display: block;
        font-size: 1.05rem;
        margin-bottom: 6px;
        color: var(--text);
      }

      .highlight-card span {
        color: var(--text-soft);
        font-size: 0.9rem;
        line-height: 1.55;
      }

      .hero-card {
        min-height: 540px;
        position: relative;
        border-left: 1px solid var(--line);
        background: #dbe6d7;
      }

      .hero-card::after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, rgba(17, 42, 29, 0.05), rgba(17, 42, 29, 0.32));
      }

      .hero-card img {
        position: absolute;
        inset: 0;
      }

      .hero-overlay {
        position: absolute;
        left: 20px;
        right: 20px;
        bottom: 20px;
        z-index: 1;
        display: grid;
        gap: 12px;
      }

      .hero-panel {
        padding: 16px 18px;
        border-radius: 14px;
        background: rgba(255, 255, 255, 0.94);
        border: 1px solid rgba(215, 225, 212, 0.9);
      }

      .hero-panel-row {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
      }

      .hero-panel-title {
        font-size: 0.96rem;
        font-weight: 700;
      }

      .hero-panel-subtitle {
        color: var(--text-soft);
        font-size: 0.9rem;
        margin-top: 5px;
      }

      .status-dot {
        width: 10px;
        height: 10px;
        border-radius: 50%;
        background: var(--primary);
        flex-shrink: 0;
      }

      .section {
        padding: 80px 0;
        scroll-margin-top: 100px;
      }

      .section-header {
        position: relative;
        max-width: 760px;
        margin-bottom: 30px;
        display: grid;
        gap: 14px;
        padding-bottom: 10px;
      }

      .section-header::after {
        content: "";
        width: 120px;
        height: 3px;
        border-radius: 999px;
        background: linear-gradient(90deg, rgba(31, 90, 63, 0.95), rgba(31, 90, 63, 0.12));
        transform-origin: left;
        transform: scaleX(0.2);
        opacity: 0.6;
        transition: transform 0.8s ease, opacity 0.8s ease;
      }

      .section-header.reveal.is-visible::after {
        transform: scaleX(1);
        opacity: 0.95;
      }

      .section-grid {
        display: grid;
        gap: 24px;
        align-items: center;
      }

      .section-media {
        min-height: 260px;
        border-radius: 22px;
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--line);
      }

      .section-media video {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
      }

      .focus-grid {
        display: grid;
        gap: 18px;
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      }

      .focus-card {
        padding: 0;
        gap: 0;
        overflow: hidden;
        border-radius: 18px;
        border: 1px solid var(--line);
        background: var(--surface);
        box-shadow: var(--shadow-sm);
      }

      .focus-card:hover {
        transform: translateY(-3px);
        border-color: var(--line-strong);
      }

      .focus-card-image {
        height: 220px;
        overflow: hidden;
      }

      .focus-card-image img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
        transition: transform 0.6s ease;
      }

      .focus-card:hover .focus-card-image img {
        transform: scale(1.04);
      }

      .focus-card-content {
        padding: 18px 18px 20px;
        display: grid;
        gap: 10px;
      }

      .focus-card-content h3 {
        font-size: 1.15rem;
        color: var(--text);
      }

      .focus-card-content .body-text {
        line-height: 1.65;
      }

      .petroleum-section {
        position: relative;
        background:
          radial-gradient(circle at 15% 20%, rgba(31, 90, 63, 0.18), transparent 55%),
          radial-gradient(circle at 85% 0%, rgba(183, 139, 63, 0.18), transparent 45%),
          linear-gradient(180deg, #f6f1e9 0%, #f7faf7 100%);
      }

      .petroleum-wrap {
        border-radius: 28px;
        border: 1px solid rgba(164, 128, 77, 0.25);
        background: rgba(255, 255, 255, 0.88);
        box-shadow: 0 20px 50px rgba(31, 34, 28, 0.12);
        overflow: hidden;
        display: grid;
        gap: 0;
      }

      .petroleum-video {
        position: relative;
        min-height: 360px;
        background: #1d2a22;
      }

      .petroleum-video video {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
      }

      .petroleum-video::after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(120deg, rgba(15, 27, 20, 0.55), rgba(15, 27, 20, 0.2) 55%);
        pointer-events: none;
      }

      .petroleum-content {
        padding: 42px;
        display: grid;
        gap: 22px;
      }

      .petroleum-badges {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
      }

      .petroleum-badge {
        padding: 6px 12px;
        border-radius: 999px;
        font-size: 12px;
        font-weight: 600;
        letter-spacing: 0.02em;
        color: var(--primary-strong);
        background: rgba(31, 90, 63, 0.12);
        border: 1px solid rgba(31, 90, 63, 0.2);
      }

      .petroleum-grid {
        display: grid;
        gap: 12px;
      }

      .petroleum-point {
        padding: 16px 18px;
        border-radius: 16px;
        background: #ffffff;
        border: 1px solid #184a33;
        display: grid;
        gap: 6px;
      }

      .petroleum-point strong {
        font-size: 1rem;
      }

      .petroleum-point span {
        color: var(--text-soft);
        font-size: 0.95rem;
        line-height: 1.6;
      }

      .section-copy {
        display: grid;
        gap: 18px;
      }

      .mission-grid {
        align-items: stretch;
        gap: 20px;
      }

      .mission-media {
        min-height: 240px;
      }

      .mission-copy {
        gap: 14px;
        align-content: center;
      }

      .mission-btn {
        margin-top: 2px;
        width: fit-content;
      }

      @media (min-width: 980px) {
        .mission-grid {
          grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        }

        .mission-media {
          min-height: 300px;
        }
      }

      @media (max-width: 979px) {
        .mission-copy {
          gap: 12px;
        }

        .mission-media {
          min-height: 220px;
        }
      }

      @media (max-width: 640px) {
        .mission-section {
          padding-top: 52px;
        }

        .mission-grid {
          gap: 16px;
        }

        .mission-media {
          min-height: 200px;
          border-radius: 18px;
        }

        .mission-copy {
          gap: 10px;
        }

        .mission-copy .headline-lg {
          font-size: clamp(1.7rem, 7vw, 2.2rem);
        }

        .mission-btn {
          margin-top: 0;
        }
      }

      .card {
        background: var(--surface);
        border: 1px solid var(--line);
        border-radius: 20px;
        box-shadow: var(--shadow-sm);
      }

      .feature-list {
        display: grid;
        gap: 12px;
      }

      .feature-item {
        display: flex;
        gap: 14px;
        padding: 16px 18px;
        border-radius: 16px;
        background: var(--surface-alt);
        border: 1px solid var(--line);
      }

      .feature-bullet {
        width: 34px;
        height: 34px;
        border-radius: 10px;
        background: var(--primary-soft);
        color: var(--primary);
        display: grid;
        place-items: center;
        flex-shrink: 0;
      }

      .feature-item strong {
        display: block;
        margin-bottom: 6px;
        font-size: 1rem;
      }

      .feature-item span {
        color: var(--text-soft);
        line-height: 1.65;
        font-size: 0.96rem;
      }

      .capabilities {
        display: grid;
        gap: 18px;
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      }

      .capability-card {
        padding: 24px;
        display: grid;
        gap: 14px;
        transition: transform 0.2s ease, border-color 0.2s ease;
      }

      .capability-card:hover,
      .tier-card:hover,
      .resource-item:hover,
      .bottom-card:hover {
        transform: translateY(-3px);
        border-color: var(--line-strong);
      }

      .capability-icon {
        width: 46px;
        height: 46px;
        border-radius: 12px;
        display: grid;
        place-items: center;
        background: var(--primary-soft);
        color: var(--primary);
      }

      .membership-grid,
      .insights-grid,
      .bottom-grid,
      .contact-grid {
        display: grid;
        gap: 20px;
      }

      .tier-card {
        min-height: 460px;
        padding: 0;
        display: flex;
        flex-direction: column;
        gap: 0;
        overflow: hidden;
        transition: transform 0.2s ease, border-color 0.2s ease;
      }

      .tier-media {
        height: 240px;
        border-radius: 0;
        overflow: hidden;
        border: 0;
        box-shadow: none;
      }

      .tier-media img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: block;
        transition: transform 0.6s ease;
      }

      .tier-card:hover .tier-media img {
        transform: scale(1.03);
      }

      .tier-body {
        padding: 18px 18px 20px;
        display: grid;
        gap: 10px;
      }

      .tier-body .body-text {
        line-height: 1.6;
      }

      .tier-body .btn {
        margin-top: 6px;
        width: 100%;
      }

      .tier-features {
        margin: 6px 0 10px;
        padding-left: 18px; /* keeps the dot aligned nicely */
      }

      .tier-features li {
        margin-bottom: 4px;
      }

      .tag {
        font-family: "IBM Plex Mono", monospace;
        font-size: 10px;
        letter-spacing: 0.14em;
        text-transform: uppercase;
        color: var(--primary);
      }


      .featured-card {
        overflow: hidden;
      }

      .featured-image {
        height: 260px;
        border-bottom: 1px solid var(--line);
      }

      .featured-body {
        padding: 24px;
        display: grid;
        gap: 12px;
      }

      .resource-list {
        display: grid;
        gap: 14px;
      }

      .resource-item,
      .bottom-card {
        padding: 18px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        border-radius: 18px;
        background: var(--surface);
        border: 1px solid var(--line);
        transition: transform 0.2s ease, border-color 0.2s ease;
      }

      .item-lead {
        display: flex;
        align-items: center;
        gap: 14px;
      }

      .item-icon {
        width: 44px;
        height: 44px;
        border-radius: 12px;
        display: grid;
        place-items: center;
        background: var(--primary-soft);
        color: var(--primary);
        flex-shrink: 0;
      }

      .contact-section {
        padding-bottom: 94px;
      }

      .contact-copy {
        display: grid;
        gap: 18px;
        align-content: start;
      }

      .contact-info {
        display: grid;
        gap: 12px;
        margin-top: 6px;
      }

      .contact-info-card {
        padding: 16px 18px;
        display: flex;
        gap: 14px;
        align-items: flex-start;
        border-radius: 16px;
        background: var(--surface);
        border: 1px solid var(--line);
      }

      .contact-form {
        padding: 28px;
      }

      .form-grid {
        display: grid;
        gap: 16px;
      }

      .two-up {
        display: grid;
        gap: 16px;
      }

      .form-group {
        display: grid;
        gap: 8px;
      }

      label {
        font-size: 12px;
        color: var(--muted);
      }

      input,
      select,
      textarea {
        width: 100%;
        border: 1px solid var(--line-strong);
        background: #ffffff;
        color: var(--text);
        border-radius: 12px;
        padding: 13px 14px;
      }

      textarea {
        resize: vertical;
        min-height: 130px;
      }

      input:focus,
      select:focus,
      textarea:focus {
        outline: none;
        border-color: var(--primary);
        box-shadow: 0 0 0 3px rgba(31, 90, 63, 0.1);
      }

      .footer {
        padding: 26px 0 34px;
        border-top: 1px solid var(--line);
        background: #eef4ee;
      }

      .footer-inner {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        justify-content: space-between;
        gap: 18px;
      }

      .footer-brand {
        display: flex;
        align-items: center;
        gap: 14px;
      }

      .footer-logo {
        width: 82px;
        height: 52px;
        border-radius: 14px;
        flex-shrink: 0;
      }

      .footer-copy {
        display: grid;
        gap: 4px;
      }

      .footer-title {
        font-size: 0.95rem;
        font-weight: 700;
        color: var(--text);
        line-height: 1.2;
      }

      .footer-meta {
        font-size: 0.88rem;
        color: var(--text-soft);
        line-height: 1.5;
      }

      .footer-links {
        display: flex;
        flex-wrap: wrap;
        gap: 18px;
      }

      .footer-links a {
        font-size: 0.92rem;
        color: var(--text-soft);
        text-decoration: underline;
        text-underline-offset: 3px;
        text-decoration-thickness: 1px;
        transition: color 0.2s ease, text-decoration-color 0.2s ease;
      }

      .footer-links a:hover {
        color: var(--primary);
        text-decoration-color: var(--primary);
      }

      @media (min-width: 980px) {
        .footer-inner {
          flex-direction: row;
          align-items: center;
        }
      }


      @media (min-width: 980px) {
        .nav-links {
          display: flex;
        }

        .nav-cta {
          display: inline-flex;
        }

        .nav-toggle {
          display: none;
        }

        .hero-grid,
        .section-grid,
        .contact-grid,
        .insights-grid {
          grid-template-columns: repeat(2, minmax(0, 1fr));
        }

        .petroleum-wrap {
          grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
          align-items: stretch;
        }

        .section-grid.reverse > :first-child {
          order: 2;
        }

        .section-grid.reverse > :last-child {
          order: 1;
        }

        .membership-grid {
          grid-template-columns: repeat(3, minmax(0, 1fr));
        }

        .bottom-grid {
          grid-template-columns: repeat(2, minmax(0, 1fr));
        }

        .two-up {
          grid-template-columns: repeat(2, minmax(0, 1fr));
        }

        .footer-inner {
          flex-direction: row;
        }
      }

      @media (max-width: 979px) {
        .brand-title {
          max-width: 185px;
          white-space: normal;
          line-height: 1.2;
        }

        .hero-highlights {
          grid-template-columns: 1fr;
        }

        .hero-card {
          min-height: 420px;
          border-left: 0;
          border-top: 1px solid var(--line);
        }
      }

      @media (max-width: 640px) {
        .container {
          width: min(calc(100% - 24px), var(--container));
        }

        .site-nav {
          min-height: 72px;
        }

        .hero {
          padding: 72px 0 56px;
          min-height: 70vh;
        }

        .hero-copy,
        .contact-form,
        .petroleum-content {
          padding: 22px;
        }

        .section,
        .contact-section {
          padding: 64px 0;
        }

        .featured-image {
          height: 220px;
        }
      }

      /* Nine nav items plus the CTA do not fit this band at full size -- adding
         Partners pushed the links over the logo at ~1000px and wrapped the CTA onto
         two lines up to ~1250px. Below 980px the desktop nav is hidden anyway, and
         above this band everything fits unchanged. */
      @media (min-width: 980px) and (max-width: 1259px) {
        .site-nav { gap: 12px; }
        .brand-mark { width: 96px; height: 66px; }
        .nav-links { gap: 0; }
        .nav-links a { padding: 10px 7px; font-size: 0.9rem; }
        .nav-cta { padding: 0 14px; font-size: 0.9rem; white-space: nowrap; }
      }