/* Escopo: index.html */
:root {
            --bg-dark: #1a1d21;
            --bg-card: #252a30;
            --bg-elevated: #2d333b;
            --text-primary: #e6edf3;
            --text-secondary: #8b949e;
            --accent-blue: #58a6ff;
            --accent-gold: #d4a853;
            --border: #373e47;
        }

        html {
            scroll-behavior: smooth;
        }

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

        body {
            font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, sans-serif;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--bg-dark);
            min-height: 100vh;
            padding: 0 20px 40px;
        }

        .wrapper {
            max-width: 900px;
            margin: 0 auto;
        }

        /* Hero */
        header {
            padding: 48px 0 40px;
            text-align: center;
            border-bottom: 1px solid var(--border);
        }

        header .release-note {
            margin-top: 12px;
            font-size: 0.88rem;
            color: var(--text-secondary);
        }

        header .release-note strong {
            color: var(--accent-gold);
            font-weight: 600;
        }

        .nav-card.nav-card-destaque {
            border: 1px solid rgba(212, 168, 83, 0.4);
            box-shadow: 0 0 0 1px rgba(212, 168, 83, 0.12);
        }

        header h1 {
            font-size: 1.75rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        header .subtitle {
            font-size: 1rem;
            font-weight: 400;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.65;
        }

        header .tagline {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--accent-gold);
            max-width: 640px;
            margin: 16px auto 0;
            line-height: 1.6;
        }

        /* Metodologia */
        .methodology {
            margin: 40px 0 48px;
        }

        .methodology .card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 28px 32px;
        }

        .methodology .card h2 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--accent-gold);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 14px;
        }

        .methodology .card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .methodology .card p strong {
            color: var(--text-primary);
        }

        .methodology .card.card-differential {
            margin-top: 20px;
        }

        /* Navigation cards */
        .nav-section-title {
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        .nav-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
        }

        .nav-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 24px;
            text-decoration: none;
            color: inherit;
            transition: border-color 0.2s, background 0.2s;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }

        .nav-card:hover {
            border-color: var(--accent-blue);
            background: var(--bg-elevated);
        }

        .nav-card-ambiental {
            border-left: 4px solid #2d8a4e;
        }
        .nav-card-ambiental:hover {
            border-color: #2d8a4e;
            background: rgba(45, 138, 78, 0.08);
        }
        .nav-card-ambiental h3 { color: #4ade80; }

        .nav-card-mineracao {
            border-left: 4px solid #8b949e;
        }
        .nav-card-mineracao:hover {
            border-color: var(--accent-gold);
            background: rgba(212, 168, 83, 0.08);
        }
        .nav-card-mineracao h3 { color: var(--accent-gold); }

        .nav-card-campo-largo {
            border-left: 4px solid #f59e0b;
        }
        .nav-card-campo-largo:hover {
            border-color: #f59e0b;
            background: rgba(245, 158, 11, 0.08);
        }
        .nav-card-campo-largo h3 { color: #f59e0b; }

        .nav-card .icon {
            width: 40px;
            height: 40px;
            margin-bottom: 16px;
            flex-shrink: 0;
        }

        .nav-card .icon svg {
            width: 100%;
            height: 100%;
        }

        .nav-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .nav-card p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.55;
        }

        /* Footer */
        footer {
            margin-top: 56px;
            padding-top: 28px;
            border-top: 1px solid var(--border);
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        footer p {
            margin-bottom: 8px;
        }

        footer a {
            color: var(--accent-blue);
            text-decoration: none;
        }

        footer a:hover {
            text-decoration: underline;
        }

        footer .soberania {
            margin-top: 16px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            opacity: 0.9;
        }

        footer .apostila-rodape {
            margin-top: 20px;
            padding-top: 12px;
            border-top: 1px solid rgba(55, 62, 71, 0.6);
            font-size: 0.75rem;
            color: var(--text-secondary);
            opacity: 0.85;
        }

        footer .apostila-rodape a {
            color: var(--accent-gold);
        }

        .biz-strip {
            margin: 32px 0 28px;
            padding: 22px 24px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            border-left: 4px solid var(--accent-blue);
        }
        .biz-strip h2 {
            font-size: 0.85rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--accent-blue);
            margin-bottom: 12px;
        }
        .biz-strip ol {
            margin: 0;
            padding-left: 1.2rem;
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.65;
        }
        .biz-strip li { margin-bottom: 8px; }
        .biz-strip .biz-see {
            margin-top: 14px;
            font-size: 0.85rem;
            color: var(--text-secondary);
        }
        .biz-strip .biz-see a { font-weight: 600; }

        .learning-track {
            margin-bottom: 36px;
            padding: 22px 24px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 8px;
            border-left: 4px solid var(--accent-gold);
        }
        .learning-track h2 {
            font-size: 0.85rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--accent-gold);
            margin-bottom: 14px;
        }
        .learning-steps {
            display: grid;
            gap: 14px;
        }
        @media (min-width: 640px) {
            .learning-steps { grid-template-columns: repeat(3, 1fr); }
        }
        .learning-step {
            padding: 14px;
            background: var(--bg-elevated);
            border-radius: 6px;
            border: 1px solid var(--border);
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.55;
        }
        .learning-step strong {
            display: block;
            color: var(--text-primary);
            margin-bottom: 6px;
            font-size: 0.82rem;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            color: var(--accent-gold);
        }
        .honesty-note {
            margin-top: 12px;
            padding: 12px 14px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            background: rgba(88, 166, 255, 0.06);
            border-radius: 6px;
            border: 1px solid rgba(88, 166, 255, 0.2);
            line-height: 1.5;
        }