:root {
        --blue-dark: #001a33;
        --blue-medium: #0066cc;
        --blue-light: #3399ff;
        --emerald-dark: #00573D;
        --emerald-medium: #008060;
        --emerald-light: #00B388;
        --teal-dark: #004D4D;
        --teal-light: #008080;
        --black: #1a1a1a;
        --white: #f8f9fa;
        --gray: #5a5a5a;
        --silver: #e9ecef;
        --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
        --font-alt: 'Montserrat', var(--font-main);
        --section-padding: 6rem 0;
        --card-padding: 2.5rem;
        --border-radius: 16px;
        --box-shadow: 0 12px 24px -8px rgba(0,0,0,0.15);
        --box-shadow-hover: 0 20px 40px -10px rgba(0,0,0,0.2);
    }

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

    body {
        font-family: var(--font-main);
        color: var(--black);
        background-color: var(--white);
        line-height: 1.8;
        font-size: 1.1rem;
        overflow-x: hidden;
        position: relative;
    }

    /* Mejoras de accesibilidad */
    a:focus, button:focus {
        outline: 3px solid var(--emerald-medium);
        outline-offset: 3px;
    }

    .sr-only {
        position: absolute;
        width: 1px;
        height: 1px;
        padding: 0;
        margin: -1px;
        overflow: hidden;
        clip: rect(0, 0, 0, 0);
        white-space: nowrap;
        border-width: 0;
    }

    .stars {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: -1;
        overflow: hidden;
        will-change: transform;
    }

    .star {
        position: absolute;
        background-color: rgba(255,255,255,0.8);
        border-radius: 50%;
        animation: twinkle var(--duration) infinite ease-in-out;
        opacity: var(--opacity);
        will-change: transform, opacity;
    }

    @keyframes twinkle {
        0%, 100% { opacity: 0.2; }
        50% { opacity: 1; }
    }

    .main-content {
        background-color: var(--white);
        position: relative;
        z-index: 1;
        box-shadow: 0 0 50px rgba(0,0,0,0.3);
        max-width: 1200px;
        margin: 0 auto;
    }

    header {
        background: linear-gradient(145deg, var(--blue-dark), var(--blue-medium));
        color: var(--white);
        padding: var(--section-padding);
        text-align: center;
        position: relative;
        overflow: hidden;
    }

    header::before {
        content: '';
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
        animation: rotate 20s linear infinite;
        z-index: 1;
    }

    .header-content {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 2rem;
        position: relative;
        z-index: 2;
    }

    .logo-container {
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 2rem;
        transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

    .logo-container:hover {
        transform: scale(1.03);
    }

    .logo-img {
        height: 120px;
        width: 120px;
        margin-right: 25px;
        filter: drop-shadow(0 6px 12px rgba(0,0,0,0.25));
        transition: all 0.4s ease;
        animation: pulse 3s infinite;
        object-fit: contain;
        alt: "Logo de Red Neural";
    }

    .logo-img:hover {
        filter: drop-shadow(0 8px 16px rgba(0,0,0,0.3));
    }

    .logo-text {
        font-family: var(--font-alt);
        font-size: 4.2rem;
        font-weight: 800;
        display: inline-block;
        text-shadow: 0 4px 8px rgba(0,0,0,0.3);
        background: linear-gradient(to right, var(--white), var(--silver));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        letter-spacing: -1px;
    }

    .logo-text span {
        color: var(--emerald-light);
        -webkit-text-fill-color: var(--emerald-light);
    }

    .subtitle {
        font-size: 1.4rem;
        max-width: 800px;
        margin: 0 auto;
        color: rgba(255,255,255,0.95);
        font-weight: 400;
        line-height: 1.9;
        text-shadow: 0 1px 3px rgba(0,0,0,0.2);
        margin-bottom: 3rem;
    }

    .header-cta {
        display: inline-block;
        padding: 1.2rem 3rem;
        background: linear-gradient(145deg, var(--emerald-medium), var(--emerald-light));
        color: var(--white);
        border-radius: 50px;
        font-weight: 700;
        text-decoration: none;
        font-size: 1.2rem;
        margin-top: 2rem;
        box-shadow: var(--box-shadow);
        transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
        border: none;
        cursor: pointer;
        position: relative;
        overflow: hidden;
        z-index: 1;
        animation: pulse 2.5s infinite;
    }

    .header-cta:hover {
        transform: translateY(-5px);
        box-shadow: var(--box-shadow-hover);
    }

    .header-cta::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(145deg, var(--emerald-light), var(--emerald-medium));
        opacity: 0;
        transition: opacity 0.4s ease;
        z-index: -1;
    }

    .header-cta:hover::before {
        opacity: 1;
    }

    .companies {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
        gap: 3rem;
        margin: -5rem auto 0;
        padding: 0 2rem;
        max-width: 1400px;
        position: relative;
        z-index: 3;
    }

    .company-card {
        background: var(--white);
        border-radius: var(--border-radius);
        overflow: hidden;
        box-shadow: var(--box-shadow);
        transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
        border: 1px solid rgba(0,0,0,0.05);
        position: relative;
        animation: fadeIn 0.8s ease forwards;
        opacity: 0;
        --x: 50%;
        --y: 50%;
    }

    .company-card:hover {
        transform: translateY(-15px);
        box-shadow: var(--box-shadow-hover);
    }

    .company-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: radial-gradient(circle at var(--x) var(--y), rgba(0,180,136,0.1) 0%, transparent 20%);
        pointer-events: none;
        opacity: 0;
        transition: opacity 0.3s;
    }

    .company-card:hover::before {
        opacity: 1;
    }

    .company-card:nth-child(1) { animation-delay: 0.1s; }
    .company-card:nth-child(2) { animation-delay: 0.3s; }
    .company-card:nth-child(3) { animation-delay: 0.5s; }

    .rp2 .company-header {
        background: linear-gradient(145deg, var(--emerald-dark), var(--emerald-medium));
        color: var(--white);
    }

    .rp3 .company-header {
        background: linear-gradient(145deg, var(--blue-medium), var(--blue-light));
        color: var(--white);
    }

    .sqg .company-header {
        background: linear-gradient(145deg, var(--teal-dark), var(--teal-light));
        color: var(--white);
    }

    .company-header {
        padding: 3rem 2.5rem;
        text-align: center;
        position: relative;
        overflow: hidden;
    }

    .company-header::before {
        content: '';
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 70%);
        opacity: 0;
        transition: opacity 0.6s ease;
    }

    .company-card:hover .company-header::before {
        opacity: 1;
    }

    .company-logo {
        width: 110px;
        height: 110px;
        margin: 0 auto 1.5rem;
        background-color: var(--white);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        box-shadow: 0 10px 25px rgba(0,0,0,0.2);
        border: 3px solid rgba(255,255,255,0.3);
        overflow: hidden;
        transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

    .company-card:hover .company-logo {
        transform: rotate(5deg) scale(1.1);
        box-shadow: 0 15px 30px rgba(0,0,0,0.25);
    }

    .company-logo img {
        width: 70%;
        height: 70%;
        object-fit: contain;
    }

    .company-name {
        font-family: var(--font-alt);
        font-size: 2rem;
        margin-bottom: 1rem;
        font-weight: 700;
        letter-spacing: -0.5px;
    }

    .company-desc {
        font-size: 1.1rem;
        opacity: 0.95;
        font-weight: 400;
    }

    .company-body {
        padding: var(--card-padding);
    }

    .company-info {
        margin-bottom: 2.5rem;
    }

    .company-info p {
        margin-bottom: 1.5rem;
        color: var(--black);
        line-height: 1.9;
    }

    .company-info ul {
        margin-left: 1.5rem;
        margin-bottom: 2rem;
        list-style-type: none;
    }

    .company-info li {
        margin-bottom: 1rem;
        position: relative;
        padding-left: 2rem;
        line-height: 1.7;
    }

    .company-info li::before {
        content: '→';
        color: var(--emerald-medium);
        font-weight: 700;
        position: absolute;
        left: 0;
    }

    .company-link {
        display: inline-block;
        padding: 1.2rem 2.5rem;
        border-radius: 50px;
        font-weight: 700;
        text-decoration: none;
        text-align: center;
        width: 100%;
        transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
        color: var(--white);
        font-size: 1.1rem;
        border: none;
        cursor: pointer;
        box-shadow: 0 6px 15px rgba(0,0,0,0.1);
        position: relative;
        overflow: hidden;
        z-index: 1;
    }

    .rp2 .company-link {
        background: linear-gradient(145deg, var(--emerald-dark), var(--emerald-medium));
    }

    .rp3 .company-link {
        background: linear-gradient(145deg, var(--blue-medium), var(--blue-light));
    }

    .sqg .company-link {
        background: linear-gradient(145deg, var(--teal-dark), var(--teal-light));
    }

    .company-link:hover {
        transform: translateY(-5px);
        box-shadow: 0 12px 25px rgba(0,0,0,0.2);
    }

    .company-link::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, rgba(255,255,255,0.3), transparent);
        transform: translateX(-100%);
        transition: transform 0.6s ease;
        z-index: -1;
    }

    .company-link:hover::after {
        transform: translateX(100%);
    }

    .social-proof {
        background-color: var(--white);
        padding: 6rem 0;
        margin-top: 4rem;
        position: relative;
    }

    .social-proof::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100" opacity="0.03"><circle cx="50" cy="50" r="40" fill="none" stroke="%23006040" stroke-width="1"/></svg>');
    }

    .proof-container {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 2rem;
        position: relative;
    }

    .proof-title {
        text-align: center;
        font-family: var(--font-alt);
        font-size: 2.5rem;
        margin-bottom: 4rem;
        color: var(--blue-dark);
        position: relative;
        display: inline-block;
    }

    .proof-title::after {
        content: '';
        position: absolute;
        bottom: -15px;
        left: 50%;
        transform: translateX(-50%);
        width: 80px;
        height: 4px;
        background: linear-gradient(to right, var(--emerald-medium), var(--blue-light));
        border-radius: 2px;
    }

    .proof-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 3rem;
    }

    .proof-item {
        background: var(--white);
        border-radius: var(--border-radius);
        padding: 3rem 2rem;
        box-shadow: var(--box-shadow);
        text-align: center;
        transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
        border: 1px solid rgba(0,0,0,0.05);
        position: relative;
        overflow: hidden;
        animation: fadeIn 0.6s ease forwards;
        opacity: 0;
    }

    .proof-item:hover {
        transform: translateY(-10px);
        box-shadow: var(--box-shadow-hover);
    }

    .proof-item::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 5px;
        background: linear-gradient(to right, var(--emerald-medium), var(--blue-light));
    }

    .proof-number {
        font-family: var(--font-alt);
        font-size: 3.5rem;
        font-weight: 800;
        color: var(--emerald-medium);
        margin-bottom: 1.5rem;
        line-height: 1;
        background: linear-gradient(to right, var(--emerald-medium), var(--blue-light));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .proof-text {
        color: var(--gray);
        font-size: 1.2rem;
    }

    footer {
        background: linear-gradient(145deg, var(--blue-dark), #001a33);
        color: var(--white);
        padding: 8rem 0 4rem;
        margin-top: 6rem;
        position: relative;
    }

    footer::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100" opacity="0.03"><circle cx="50" cy="50" r="40" fill="none" stroke="%23FFFFFF" stroke-width="0.5"/></svg>');
    }

    .footer-content {
        max-width: 1200px;
        margin: 0 auto;
        padding: 0 2rem;
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: 4rem;
        position: relative;
        z-index: 2;
    }

    .footer-logo-container {
        display: flex;
        align-items: center;
        margin-bottom: 2rem;
    }

    .footer-logo-img {
        height: 60px;
        width: 60px;
        margin-right: 20px;
        filter: drop-shadow(0 4px 8px rgba(0,0,0,0.3));
        alt: "Logo pequeño de Red Neural";
    }

    .footer-logo {
        font-family: var(--font-alt);
        font-size: 2.5rem;
        font-weight: 700;
        background: linear-gradient(to right, var(--white), var(--silver));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        letter-spacing: -1px;
    }

    .footer-logo span {
        color: var(--emerald-light);
        -webkit-text-fill-color: var(--emerald-light);
    }

    .footer-tagline {
        color: rgba(255,255,255,0.8);
        line-height: 1.9;
        margin-top: 1.5rem;
        font-size: 1.1rem;
    }

    .footer-column h3 {
        font-family: var(--font-alt);
        margin-bottom: 2rem;
        position: relative;
        color: var(--emerald-light);
        font-size: 1.4rem;
        padding-bottom: 1rem;
        letter-spacing: -0.5px;
    }

    .footer-column h3::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        width: 50px;
        height: 3px;
        background: linear-gradient(to right, var(--emerald-medium), var(--emerald-light));
        border-radius: 3px;
    }

    .footer-links {
        list-style: none;
    }

    .footer-links li {
        margin-bottom: 1.2rem;
        position: relative;
        transition: all 0.3s ease;
    }

    .footer-links li:hover {
        transform: translateX(8px);
    }

    .footer-links a {
        color: rgba(255,255,255,0.8);
        text-decoration: none;
        transition: all 0.3s ease;
        display: block;
        padding: 0.4rem 0;
    }

    .footer-links a:hover {
        color: var(--emerald-light);
    }

    .footer-links li::before {
        content: '→';
        position: absolute;
        left: -25px;
        opacity: 0;
        color: var(--emerald-light);
        transition: all 0.3s ease;
    }

    .footer-links li:hover::before {
        opacity: 1;
        left: -18px;
    }

    .copyright {
        grid-column: 1/-1;
        text-align: center;
        margin-top: 6rem;
        padding-top: 3rem;
        border-top: 1px solid rgba(255,255,255,0.1);
        font-size: 0.95rem;
        color: var(--silver);
        line-height: 1.6;
    }

    .feedback-notification {
        position: fixed;
        bottom: 30px;
        right: 30px;
        background: linear-gradient(145deg, var(--emerald-medium), var(--emerald-dark));
        color: #fff;
        padding: 0;
        border-radius: var(--border-radius);
        box-shadow: 0 15px 35px rgba(0,0,0,0.3);
        display: flex;
        align-items: center;
        z-index: 10000;
        opacity: 0;
        transform: translateY(100px);
        transition: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
        backdrop-filter: blur(5px);
        border: 1px solid rgba(255,255,255,0.2);
        max-width: 320px;
        overflow: hidden;
    }

    .feedback-notification::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: radial-gradient(circle at 80% 20%, rgba(255,255,255,0.15) 0%, transparent 40%);
        pointer-events: none;
    }

    @keyframes fadeIn {
        from { opacity: 0; transform: translateY(30px); }
        to { opacity: 1; transform: translateY(0); }
    }

    @keyframes pulse {
        0% { transform: scale(1); }
        50% { transform: scale(1.05); }
        100% { transform: scale(1); }
    }

    @keyframes rotate {
        0% { transform: rotate(0deg); }
        100% { transform: rotate(360deg); }
    }

    @media (max-width: 1200px) {
        .logo-text { font-size: 3.5rem; }
    }

    @media (max-width: 992px) {
        :root {
            --section-padding: 5rem 0;
        }
        .logo-text { font-size: 3rem; }
        .subtitle { font-size: 1.2rem; }
        .companies {
            grid-template-columns: 1fr;
            margin-top: -3rem;
        }
        .company-card {
            max-width: 600px;
            margin: 0 auto;
        }
    }

    @media (max-width: 768px) {
        .logo-container {
            flex-direction: column;
        }
        .logo-img {
            margin-right: 0;
            margin-bottom: 25px;
            height: 100px;
            width: 100px;
        }
        .logo-text { font-size: 2.8rem; }
        .header-cta {
            padding: 1rem 2.5rem;
            font-size: 1.1rem;
        }
        .company-logo {
            width: 90px;
            height: 90px;
        }
        .company-name { font-size: 1.8rem; }
        .footer-logo-container {
            flex-direction: column;
            align-items: flex-start;
        }
        .footer-logo-img {
            margin-bottom: 20px;
            margin-right: 0;
        }
    }

    @media (max-width: 576px) {
        :root {
            --section-padding: 4rem 0;
            --card-padding: 2rem;
        }
        header { padding: 3.5rem 0; }
        .logo-text { font-size: 2.4rem; }
        .subtitle {
            font-size: 1.1rem;
            padding: 0 1rem;
        }
        .company-body, .company-header { padding: 2rem; }
        .footer-content {
            grid-template-columns: 1fr;
            gap: 3rem;
        }
        .footer-column { margin-bottom: 2rem; }
        .proof-item { padding: 2.5rem 1.5rem; }
        .proof-number { font-size: 3rem; }
    }

    /* Optimización de animaciones para dispositivos móviles */
    @media (prefers-reduced-motion: reduce) {
        * {
            animation-duration: 0.01ms !important;
            animation-iteration-count: 1 !important;
            transition-duration: 0.01ms !important;
            scroll-behavior: auto !important;
        }
    }