:root {
    --bg-dark: #0A0D14;
    --bg-card: #121824;
    --bg-card-hover: #1A2234;
    --accent-blue: #0066FF;
    --accent-cyan: #00D2FF;
    --text-main: #F0F4F8;
    --text-muted: #94A3B8;
    --border-color: rgba(255, 255, 255, 0.08);
    --gradient-accent: linear-gradient(135deg, #0066FF 0%, #00D2FF 100%);
    --whatsapp-green: #25D366;
    --whatsapp-hover: #20ba5a;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    :root {
        --bg-dark: #0A0D14;
        --bg-card: #121824;
        --bg-card-hover: #1A2234;
        --accent-blue: #0066FF;
        --accent-cyan: #00D2FF;
        --text-main: #F0F4F8;
        --text-muted: #94A3B8;
        --border-color: rgba(255, 255, 255, 0.08);
        --gradient-accent: linear-gradient(135deg, #0066FF 0%, #00D2FF 100%);
        --whatsapp-green: #25D366;
        --whatsapp-hover: #20ba5a;
    }

    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: 'Inter', sans-serif;
        scroll-behavior: smooth;
    }

    body {
        background-color: var(--bg-dark);
        color: var(--text-main);
        line-height: 1.6;
        overflow-x: hidden;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 24px;
    }

    header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        background: rgba(10, 13, 20, 0.85);
        backdrop-filter: blur(12px);
        z-index: 1000;
        border-bottom: 1px solid var(--border-color);
    }

    nav {
        display: flex;
        justify-content: center;
        align-items: center;
        height: 80px;
    }

    .logo {
        font-size: 28px;
        font-weight: 800;
        letter-spacing: 2px;
        color: #FFFFFF;
        text-decoration: none;
        display: flex;
        align-items: center;
        gap: 2px;
        margin-right: 32px;
    }

    .logo span {
        color: var(--accent-blue);
    }

    .nav-links {
        display: flex;
        gap: 32px;
        list-style: none;
    }

    .nav-links a {
        color: var(--text-muted);
        text-decoration: none;
        font-weight: 500;
        transition: color 0.3s;
        font-size: 15px;
    }

    .nav-links a:hover {
        color: var(--text-main);
    }

    .btn-whatsapp {
        background-color: var(--whatsapp-green);
        color: #FFF;
        padding: 12px 24px;
        border-radius: 50px;
        font-weight: 600;
        text-decoration: none;
        display: inline-flex;
        align-items: center;
        gap: 10px;
        transition: all 0.3s ease;
        box-shadow: 0 4px 20px rgba(37, 211, 102, 0.3);
        border: none;
        cursor: pointer;
    }

    .btn-whatsapp:hover {
        background-color: var(--whatsapp-hover);
        transform: translateY(-2px);
        box-shadow: 0 6px 24px rgba(37, 211, 102, 0.45);
    }

    .btn-primary {
        background: var(--gradient-accent);
        color: #FFF;
        padding: 14px 32px;
        border-radius: 8px;
        font-weight: 600;
        text-decoration: none;
        display: inline-flex;
        align-items: center;
        gap: 10px;
        transition: all 0.3s ease;
        box-shadow: 0 4px 20px rgba(0, 102, 255, 0.3);
    }

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 25px rgba(0, 102, 255, 0.5);
    }

    .hero {
        padding: 180px 0 100px;
        background: radial-gradient(circle at 50% 20%, rgba(0, 102, 255, 0.15) 0%, rgba(10, 13, 20, 0) 70%);
        text-align: center;
    }

    .hero-badge {
        display: inline-block;
        padding: 6px 16px;
        background: rgba(0, 102, 255, 0.1);
        border: 1px solid rgba(0, 102, 255, 0.3);
        border-radius: 50px;
        color: var(--accent-cyan);
        font-size: 14px;
        font-weight: 600;
        margin-bottom: 24px;
    }

    .hero h1 {
        font-size: 52px;
        font-weight: 800;
        line-height: 1.15;
        margin-bottom: 24px;
        background: linear-gradient(180deg, #FFFFFF 0%, #94A3B8 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .hero h1 span {
        background: var(--gradient-accent);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .hero p {
        font-size: 18px;
        color: var(--text-muted);
        max-width: 760px;
        margin: 0 auto 40px;
    }

    .hero-ctas {
        display: flex;
        justify-content: center;
        gap: 20px;
        flex-wrap: wrap;
    }

    .highlights {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 24px;
        margin-top: 80px;
    }

    .highlight-card {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        padding: 32px;
        border-radius: 16px;
        text-align: left;
        transition: transform 0.3s, border-color 0.3s;
    }

    .highlight-card:hover {
        transform: translateY(-5px);
        border-color: rgba(0, 102, 255, 0.4);
    }

    .highlight-icon {
        width: 50px;
        height: 50px;
        border-radius: 12px;
        background: rgba(0, 102, 255, 0.1);
        color: var(--accent-cyan);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 22px;
        margin-bottom: 20px;
    }

    .highlight-card h3 {
        font-size: 20px;
        margin-bottom: 12px;
    }

    .highlight-card p {
        font-size: 14px;
        color: var(--text-muted);
    }

    .section-header {
        text-align: center;
        margin-bottom: 60px;
    }

    .section-header h2 {
        font-size: 36px;
        font-weight: 700;
        margin-bottom: 16px;
    }

    .section-header p {
        color: var(--text-muted);
        font-size: 16px;
        max-width: 600px;
        margin: 0 auto;
    }

    .challenges {
        padding: 100px 0;
        background: rgba(18, 24, 36, 0.5);
        border-top: 1px solid var(--border-color);
        border-bottom: 1px solid var(--border-color);
    }

    .grid-3 {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
        gap: 24px;
    }

    .challenge-card {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: 16px;
        padding: 28px;
        display: flex;
        gap: 20px;
        align-items: flex-start;
    }

    .challenge-icon {
        font-size: 24px;
        color: #FF5252;
        background: rgba(255, 82, 82, 0.1);
        padding: 14px;
        border-radius: 12px;
    }

    .challenge-content h4 {
        font-size: 18px;
        margin-bottom: 8px;
    }

    .challenge-content p {
        font-size: 14px;
        color: var(--text-muted);
    }

    .solution {
        padding: 100px 0;
    }

    .solution-box {
        background: linear-gradient(135deg, rgba(0, 102, 255, 0.1) 0%, rgba(0, 210, 255, 0.05) 100%);
        border: 1px solid rgba(0, 102, 255, 0.3);
        border-radius: 24px;
        padding: 60px 40px;
        text-align: center;
        position: relative;
        overflow: hidden;
    }

    .solution-box h2 {
        font-size: 36px;
        margin-bottom: 20px;
    }

    .solution-box p {
        font-size: 18px;
        color: var(--text-muted);
        max-width: 800px;
        margin: 0 auto 40px;
    }

    .key-feature {
        display: inline-flex;
        align-items: center;
        gap: 12px;
        background: var(--bg-card);
        padding: 16px 28px;
        border-radius: 50px;
        border: 1px solid var(--border-color);
        font-weight: 600;
        color: var(--accent-cyan);
        font-size: 18px;
    }

    .how-it-works {
        padding: 100px 0;
        background: rgba(18, 24, 36, 0.3);
    }

    .steps-wrapper {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 20px;
        margin-top: 50px;
    }

    .step-card {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: 16px;
        padding: 24px;
        position: relative;
    }

    .step-number {
        font-size: 14px;
        font-weight: 700;
        color: var(--accent-cyan);
        background: rgba(0, 210, 255, 0.1);
        width: 32px;
        height: 32px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 16px;
    }

    .step-card h4 {
        font-size: 16px;
        margin-bottom: 8px;
    }

    .step-card p {
        font-size: 13px;
        color: var(--text-muted);
    }

    .benefits {
        padding: 100px 0;
    }

    .benefits-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
        gap: 32px;
    }

    @media (max-width: 768px) {
        .benefits-grid {
            grid-template-columns: 1fr;
        }
    }

    .benefit-column {
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        border-radius: 20px;
        padding: 40px;
    }

    .benefit-column.municipio {
        border-top: 4px solid var(--accent-blue);
    }

    .benefit-column.contribuinte {
        border-top: 4px solid var(--accent-cyan);
    }

    .benefit-header {
        display: flex;
        align-items: center;
        gap: 16px;
        margin-bottom: 30px;
    }

    .benefit-header i {
        font-size: 28px;
        color: var(--accent-cyan);
    }

    .benefit-header h3 {
        font-size: 24px;
    }

    .benefit-list {
        list-style: none;
    }

    .benefit-list li {
        display: flex;
        align-items: center;
        gap: 14px;
        margin-bottom: 18px;
        font-size: 16px;
        color: var(--text-main);
    }

    .benefit-list li i {
        color: #10B981;
        font-size: 18px;
    }

    .cta-banner {
        padding: 80px 0;
        background: linear-gradient(180deg, var(--bg-dark) 0%, #0F172A 100%);
        border-top: 1px solid var(--border-color);
        text-align: center;
    }

    .cta-banner h2 {
        font-size: 38px;
        margin-bottom: 16px;
    }

    .cta-banner p {
        color: var(--text-muted);
        font-size: 18px;
        margin-bottom: 32px;
    }

    footer {
        background: #06080D;
        padding: 40px 0;
        border-top: 1px solid var(--border-color);
        text-align: center;
        color: var(--text-muted);
        font-size: 14px;
    }

    .whatsapp-float {
        position: fixed;
        bottom: 30px;
        right: 30px;
        background-color: var(--whatsapp-green);
        color: #FFF;
        width: 60px;
        height: 60px;
        border-radius: 50px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 30px;
        box-shadow: 0 4px 20px rgba(37, 211, 102, 0.5);
        z-index: 9999;
        text-decoration: none;
        transition: all 0.3s ease;
    }

    .whatsapp-float:hover {
        transform: scale(1.1);
        background-color: var(--whatsapp-hover);
    }