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

        :root {
            --bg: #05080d;
            --bg-soft: #09111c;
            --panel: rgba(9, 17, 28, 0.78);
            --panel-strong: rgba(12, 22, 35, 0.92);
            --text: #e6f1ff;
            --muted: #8fa3b8;
            --cyan: #00d4ff;
            --blue: #0099ff;
            --green: #36f5a2;
            --violet: #7c3aed;
            --line: rgba(0, 212, 255, 0.18);
        }

        html {
            scroll-behavior: smooth;
        }

        /* Skip Link - Accessibility */
        .skip-link {
            position: absolute;
            top: -40px;
            left: 0;
            background: #0099ff;
            color: white;
            padding: 0.5rem 1rem;
            text-decoration: none;
            z-index: 100;
            border-radius: 0 0 5px 0;
        }

        .skip-link:focus {
            top: 0;
        }

        body {
            font-family: 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
            line-height: 1.6;
            color: #e0e0e0;
            background-color: #0f0f0f;
        }

        /* Reduce motion for users who prefer it */
        @media (prefers-reduced-motion: reduce) {
            * {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }

        header {
            position: fixed;
            top: 0;
            width: 100%;
            background-color: rgba(15, 15, 15, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.5);
            z-index: 1000;
            border-bottom: 1px solid rgba(123, 60, 237, 0.1);
        }

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

        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            background: linear-gradient(135deg, #0099ff 0%, #7c3aed 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            text-decoration: none;
            letter-spacing: -0.5px;
        }

        nav ul {
            display: flex;
            list-style: none;
            gap: 2.5rem;
        }

        nav a {
            text-decoration: none;
            color: #b0b0b0;
            font-weight: 500;
            font-size: 0.95rem;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
        }

        nav a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 0;
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, #0099ff 0%, #7c3aed 100%);
            transition: width 0.3s ease;
        }

        nav a:hover {
            color: #ffffff;
        }

        nav a:hover::after {
            width: 100%;
        }

        nav a:focus {
            outline: 2px solid #0099ff;
            outline-offset: 2px;
            border-radius: 3px;
        }

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

        /* Hero Section */
        .hero {
            margin-top: 80px;
            padding: 8rem 2rem;
            background: linear-gradient(135deg, #1a0f2e 0%, #0f2540 50%, #1a0f2e 100%);
            color: white;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 20% 50%, rgba(0, 153, 255, 0.1) 0%, transparent 50%),
                        radial-gradient(circle at 80% 80%, rgba(124, 58, 237, 0.1) 0%, transparent 50%);
            pointer-events: none;
        }

        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            line-height: 1.2;
            position: relative;
            z-index: 1;
            font-weight: 700;
            letter-spacing: -1px;
        }

        .hero p {
            font-size: 1.3rem;
            margin-bottom: 2rem;
            opacity: 0.9;
            position: relative;
            z-index: 1;
            color: #b0b0b0;
            font-weight: 300;
        }

        .hero .cta-button {
            display: inline-block;
            padding: 1rem 2.5rem;
            background: linear-gradient(135deg, #0099ff 0%, #7c3aed 100%);
            color: #ffffff;
            text-decoration: none;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
            z-index: 1;
            border: 2px solid transparent;
            box-shadow: 0 10px 30px rgba(0, 153, 255, 0.3), inset 0 1px 0 rgba(255, 255, 255, 0.2);
            letter-spacing: 0.5px;
        }

        .hero .cta-button::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(135deg, #00d4ff 0%, #9d4dff 100%);
            border-radius: 50px;
            opacity: 0;
            z-index: -1;
            transition: opacity 0.3s ease;
        }

        .hero .cta-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 20px 50px rgba(124, 58, 237, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.3);
        }

        .hero .cta-button:active {
            transform: translateY(-1px);
        }

        .hero .cta-button:focus {
            outline: 2px solid #00d4ff;
            outline-offset: 2px;
        }

        /* Profile Section */
        .profile-image {
            width: 120px;
            aspect-ratio: 1 / 1;
            margin: 0 auto 2rem;
            background: linear-gradient(135deg, rgba(0, 153, 255, 0.2) 0%, rgba(124, 58, 237, 0.2) 100%);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 3px solid rgba(0, 153, 255, 0.4);
            box-shadow: 0 0 30px rgba(0, 153, 255, 0.2);
            animation: fadeInDown 0.8s ease-out;
            overflow: hidden;
        }

        .profile-image img {
            width: 100%;
            height: 100%;
            display: block;
            object-fit: cover;
            object-position: center 10%;
        }

        /* Social Media Buttons */
        .social-buttons {
            display: flex;
            justify-content: center;
            gap: 1rem;
            margin: 2rem 0;
        }

        .social-btn {
            width: 50px;
            height: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 153, 255, 0.1);
            border: 2px solid rgba(0, 153, 255, 0.3);
            border-radius: 50%;
            font-size: 1.5rem;
            cursor: pointer;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            text-decoration: none;
        }

        .social-btn:hover {
            transform: translateY(-5px) scale(1.1);
            background: rgba(0, 153, 255, 0.2);
            border-color: rgba(124, 58, 237, 0.6);
            box-shadow: 0 10px 25px rgba(0, 153, 255, 0.3);
        }

        .social-btn:active {
            transform: translateY(-2px) scale(1.08);
        }

        .social-btn svg {
            width: 1.45rem;
            height: 1.45rem;
            fill: currentColor;
        }

        /* Sections */
        section {
            padding: 5rem 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        section:last-of-type {
            border-bottom: none;
        }

        h2 {
            font-size: 2.5rem;
            margin-bottom: 0.5rem;
            color: #ffffff;
            font-weight: 700;
            background: linear-gradient(135deg, #ffffff 0%, #b0b0b0 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: #888888;
            margin-bottom: 3rem;
            font-weight: 300;
        }

        /* Back to Top Button */
        .back-to-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, #0099ff 0%, #7c3aed 100%);
            color: white;
            border: none;
            border-radius: 50%;
            font-size: 1.5rem;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            z-index: 999;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 5px 20px rgba(0, 153, 255, 0.3);
        }

        .back-to-top.show {
            opacity: 1;
            visibility: visible;
        }

        .back-to-top:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 30px rgba(0, 153, 255, 0.5);
        }

        .back-to-top:active {
            transform: translateY(-2px);
        }

        .whatsapp-button {
            position: fixed;
            bottom: 2rem;
            left: 2rem;
            width: 50px;
            height: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #ffffff;
            background: #25d366;
            border-radius: 50%;
            box-shadow: 0 8px 25px rgba(37, 211, 102, 0.35);
            z-index: 999;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            text-decoration: none;
        }

        .whatsapp-button:hover {
            transform: translateY(-5px);
            box-shadow: 0 14px 35px rgba(37, 211, 102, 0.48);
        }

        .whatsapp-button svg {
            width: 1.55rem;
            height: 1.55rem;
            fill: currentColor;
        }

        /* About Section */
        .about-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }

        .about-text,
        .about-image {
            min-width: 0;
        }

        .about-text h3 {
            font-size: 1.8rem;
            margin-bottom: 1rem;
            color: #ffffff;
            font-weight: 600;
        }

        .about-text p {
            margin-bottom: 1rem;
            line-height: 1.8;
            color: #b0b0b0;
            font-weight: 300;
        }

        .expertise-heading {
            margin-top: 1.5rem;
            margin-bottom: 0.5rem;
            color: #ffffff;
        }

        .skills-list {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 0.75rem;
            margin-top: 1.5rem;
        }

        .skills-list li {
            padding: 0.75rem 1rem;
            background: rgba(0, 153, 255, 0.05);
            border-left: 3px solid #0099ff;
            border-radius: 5px;
            color: #e0e0e0;
            font-size: 0.95rem;
            transition: all 0.3s ease;
        }

        .skills-list li:hover {
            background: rgba(0, 153, 255, 0.1);
            transform: translateX(5px);
        }

        .about-image {
            background: linear-gradient(135deg, rgba(0, 153, 255, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
            border-radius: 15px;
            padding: clamp(0.75rem, 2vw, 1.25rem);
            aspect-ratio: 16 / 9;
            text-align: center;
            font-size: 0;
            min-height: 0;
            display: flex;
            align-items: flex-start;
            justify-content: center;
            border: 2px solid rgba(0, 153, 255, 0.3);
            box-shadow: 0 0 40px rgba(0, 153, 255, 0.15);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
            overflow: hidden;
        }

        .about-image img {
            width: 100%;
            max-width: none;
            height: 100%;
            display: block;
            object-fit: cover;
            object-position: center 28%;
            border-radius: 10px;
            position: relative;
            z-index: 1;
        }

        .about-image::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 30% 30%, rgba(0, 153, 255, 0.1) 0%, transparent 60%);
            pointer-events: none;
        }

        .about-image:hover {
            transform: scale(1.02) translateY(-5px);
            box-shadow: 0 15px 50px rgba(124, 58, 237, 0.25);
            border-color: rgba(124, 58, 237, 0.5);
        }

        /* Skills Section */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 2rem;
        }

        .service-card {
            padding: 2rem;
            background: rgba(255, 255, 255, 0.02);
            border-radius: 12px;
            border: 1px solid rgba(0, 153, 255, 0.2);
            border-left: 4px solid #0099ff;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            backdrop-filter: blur(10px);
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 100px;
            height: 100px;
            background: radial-gradient(circle, rgba(0, 153, 255, 0.1) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .service-card:hover {
            transform: translateY(-8px);
            background: rgba(0, 153, 255, 0.05);
            border-color: rgba(124, 58, 237, 0.4);
            box-shadow: 0 20px 50px rgba(0, 153, 255, 0.2);
        }

        .service-card h3 {
            font-size: 1.3rem;
            margin-bottom: 1rem;
            color: #ffffff;
            font-weight: 600;
        }

        .service-card p {
            color: #b0b0b0;
            line-height: 1.8;
            font-weight: 300;
        }

        .service-list {
            list-style: none;
            margin-top: 1rem;
            display: grid;
            gap: 0.6rem;
        }

        .service-list li {
            color: #d8d8d8;
            font-size: 0.9rem;
            padding-left: 1.1rem;
            position: relative;
        }

        .service-list li::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #0099ff;
            position: absolute;
            left: 0;
            top: 0.65rem;
            box-shadow: 0 0 12px rgba(0, 153, 255, 0.55);
        }

        /* Projects Section */
        .projects-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 1.5rem;
            align-items: stretch;
            margin-top: 1rem;
        }

        #projects .container > h3 {
            margin-top: 2rem;
            margin-bottom: 1rem;
        }

        #projects .container > .section-subtitle + h3 {
            margin-top: 0;
        }

        .project-card {
            border-radius: 12px;
            overflow: hidden;
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(0, 153, 255, 0.2);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            backdrop-filter: blur(10px);
            position: relative;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .project-card:hover {
            transform: translateY(-10px);
            border-color: rgba(124, 58, 237, 0.5);
            box-shadow: 0 25px 60px rgba(0, 153, 255, 0.25);
        }

        .project-image {
            background: linear-gradient(135deg, rgba(0, 153, 255, 0.2) 0%, rgba(124, 58, 237, 0.2) 100%);
            height: 200px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 3rem;
            border-bottom: 1px solid rgba(0, 153, 255, 0.2);
        }

        .project-preview {
            font-size: 1.8rem;
            font-weight: 700;
            letter-spacing: 0;
            color: #ffffff;
            text-align: center;
        }

        .project-screenshot {
            position: relative;
            overflow: hidden;
            font-size: 1rem;
        }

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

        .project-screenshot span {
            color: #b0b0b0;
            font-weight: 600;
            padding: 1rem;
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .project-screenshot:not(.is-placeholder) span {
            display: none;
        }

        .project-info {
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .project-info h3 {
            font-size: 1.2rem;
            margin-bottom: 0.5rem;
            color: #ffffff;
            font-weight: 600;
        }

        .project-info p {
            color: #b0b0b0;
            margin-bottom: 1rem;
            font-size: 0.95rem;
            line-height: 1.6;
            font-weight: 300;
        }

        .project-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .project-actions {
            margin-top: 1rem;
            display: flex;
            flex-wrap: wrap;
            gap: 0.85rem;
        }

        .project-actions a {
            color: #00d4ff;
            font-weight: 600;
            text-decoration: none;
            font-size: 0.95rem;
        }

        .project-actions a:hover {
            text-decoration: underline;
        }

        .section-note {
            text-align: center;
            margin-top: 2rem;
            color: #888888;
            font-size: 0.95rem;
        }

        .tag {
            display: inline-block;
            padding: 0.4rem 0.9rem;
            background: rgba(0, 153, 255, 0.1);
            color: #0099ff;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid rgba(0, 153, 255, 0.3);
            transition: all 0.3s ease;
        }

        .tag:hover {
            background: rgba(0, 153, 255, 0.2);
            border-color: rgba(0, 153, 255, 0.6);
        }

        /* Technical Value Section */
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }

        .benefit-item {
            padding: 2.5rem;
            text-align: center;
            background: rgba(255, 255, 255, 0.02);
            border-radius: 12px;
            border: 1px solid rgba(0, 153, 255, 0.1);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
            overflow: hidden;
        }

        .benefit-item::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -50%;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(124, 58, 237, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .benefit-item:hover {
            background: rgba(0, 153, 255, 0.05);
            border-color: rgba(124, 58, 237, 0.3);
            transform: translateY(-8px);
            box-shadow: 0 15px 40px rgba(0, 153, 255, 0.15);
        }

        .benefit-icon {
            font-size: 2.8rem;
            margin-bottom: 1rem;
            color: #0099ff;
            font-weight: 700;
        }

        .benefit-item h3 {
            font-size: 1.2rem;
            margin-bottom: 0.5rem;
            color: #ffffff;
            font-weight: 600;
        }

        .benefit-item p {
            color: #b0b0b0;
            line-height: 1.8;
            font-weight: 300;
        }

        /* Strengths Section */
        .expect-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 1.5rem;
        }

        .expect-item {
            padding: 2rem;
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(0, 153, 255, 0.18);
            border-left: 4px solid #0099ff;
            border-radius: 12px;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .expect-item:hover {
            transform: translateY(-8px);
            background: rgba(0, 153, 255, 0.05);
            border-color: rgba(124, 58, 237, 0.35);
            box-shadow: 0 15px 40px rgba(0, 153, 255, 0.15);
        }

        .expect-item h3 {
            color: #ffffff;
            font-size: 1.15rem;
            margin-bottom: 0.75rem;
        }

        .expect-item p {
            color: #b0b0b0;
            line-height: 1.7;
            font-weight: 300;
        }

        /* Process Section */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 1.5rem;
        }

        .process-step {
            padding: 2rem;
            background: rgba(255, 255, 255, 0.02);
            border: 1px solid rgba(0, 153, 255, 0.18);
            border-radius: 12px;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .process-step:hover {
            transform: translateY(-8px);
            background: rgba(0, 153, 255, 0.05);
            border-color: rgba(124, 58, 237, 0.35);
            box-shadow: 0 15px 40px rgba(0, 153, 255, 0.15);
        }

        .process-step span {
            display: inline-block;
            color: #0099ff;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .process-step h3 {
            color: #ffffff;
            margin-bottom: 0.6rem;
        }

        .process-step p {
            color: #b0b0b0;
            line-height: 1.7;
            font-weight: 300;
        }

        /* Contact Section */
        .contact-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: start;
        }

        .contact-info {
            padding: 2.5rem;
            background: rgba(0, 153, 255, 0.05);
            border-radius: 12px;
            border: 1px solid rgba(0, 153, 255, 0.2);
            backdrop-filter: blur(10px);
        }

        .contact-info h3 {
            font-size: 1.3rem;
            margin-bottom: 1.5rem;
            color: #ffffff;
            font-weight: 600;
        }

        .contact-item {
            margin-bottom: 1.5rem;
        }

        .contact-item strong {
            display: block;
            color: #e0e0e0;
            margin-bottom: 0.3rem;
            font-weight: 600;
        }

        .contact-item p {
            color: #b0b0b0;
            font-weight: 300;
        }

        .contact-item a {
            color: #0099ff;
            text-decoration: none;
            transition: all 0.3s ease;
            font-weight: 500;
        }

        .contact-item a:hover {
            color: #00d4ff;
            text-decoration: underline;
        }

        .contact-social-block {
            margin-top: 2rem;
        }

        .contact-social-block h4 {
            margin-bottom: 1rem;
            color: #0099ff;
        }

        /* Contact Form */
        .contact-form {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .form-group {
            display: flex;
            flex-direction: column;
        }

        .form-group label {
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: #e0e0e0;
            font-size: 0.95rem;
        }

        .form-group input,
        .form-group textarea {
            padding: 0.9rem 1rem;
            border: 1px solid rgba(0, 153, 255, 0.2);
            border-radius: 8px;
            font-family: inherit;
            font-size: 0.95rem;
            background: rgba(255, 255, 255, 0.03);
            color: #e0e0e0;
            transition: all 0.3s ease;
        }

        .form-group input::placeholder,
        .form-group textarea::placeholder {
            color: #666666;
        }

        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: #0099ff;
            background: rgba(0, 153, 255, 0.08);
            box-shadow: 0 0 0 3px rgba(0, 153, 255, 0.15);
        }

        .form-group input:focus-visible,
        .form-group textarea:focus-visible {
            outline: 2px solid #00d4ff;
            outline-offset: 0;
        }

        .form-group textarea {
            resize: vertical;
            min-height: 150px;
        }

        .submit-button {
            padding: 1rem;
            background: linear-gradient(135deg, #0099ff 0%, #7c3aed 100%);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: 0 10px 30px rgba(0, 153, 255, 0.2);
        }

        .submit-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 40px rgba(124, 58, 237, 0.4);
        }

        .submit-button:active {
            transform: translateY(-1px);
        }

        .submit-button:disabled {
            opacity: 0.7;
            cursor: not-allowed;
            transform: none;
        }

        .submit-button:focus {
            outline: 2px solid #00d4ff;
            outline-offset: 2px;
        }

        .required {
            color: #ff6b6b;
        }

        .error-message {
            display: none;
            color: #ff6b6b;
            font-size: 0.85rem;
            margin-top: 0.3rem;
            font-weight: 500;
        }

        .form-group input.error,
        .form-group textarea.error {
            border-color: #ff6b6b;
            background: rgba(255, 107, 107, 0.08);
        }

        .form-group input.error:focus,
        .form-group textarea.error:focus {
            box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.15);
        }

        .form-message {
            display: none;
            padding: 1rem;
            border-radius: 8px;
            text-align: center;
            font-weight: 500;
            animation: fadeInUp 0.5s ease-out;
        }

        .form-message.success {
            display: block;
            background: rgba(76, 175, 80, 0.1);
            border: 1px solid rgba(76, 175, 80, 0.3);
            color: #4caf50;
        }

        .form-message.error {
            display: block;
            background: rgba(255, 107, 107, 0.1);
            border: 1px solid rgba(255, 107, 107, 0.3);
            color: #ff6b6b;
        }

        /* Footer */
        footer {
            background: linear-gradient(180deg, #0f0f0f 0%, #1a1a1a 100%);
            color: #b0b0b0;
            text-align: center;
            padding: 3rem 2rem;
            margin-top: 3rem;
            border-top: 1px solid rgba(0, 153, 255, 0.1);
        }

        footer p {
            margin-bottom: 0.5rem;
            font-weight: 300;
        }

        footer h3 {
            color: #ffffff;
            font-size: 1.6rem;
            margin-bottom: 0.75rem;
        }

        .footer-cta {
            display: inline-block;
            margin: 1rem 0 1.5rem;
            padding: 0.85rem 1.6rem;
            color: #ffffff;
            text-decoration: none;
            font-weight: 600;
            border-radius: 999px;
            background: linear-gradient(135deg, #0099ff 0%, #7c3aed 100%);
            box-shadow: 0 10px 30px rgba(0, 153, 255, 0.25);
        }

        .footer-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 16px 40px rgba(124, 58, 237, 0.35);
        }

        /* Thank You Page */
        .thank-you-page {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: clamp(1.25rem, 4vw, 2rem);
            background: linear-gradient(135deg, #1a0f2e 0%, #0f2540 50%, #1a0f2e 100%);
        }

        .thank-you-panel {
            width: min(720px, 100%);
            padding: clamp(2rem, 5vw, 3.5rem);
            text-align: center;
            background: rgba(15, 15, 15, 0.82);
            border: 1px solid rgba(0, 153, 255, 0.25);
            border-radius: 12px;
            box-shadow: 0 25px 70px rgba(0, 0, 0, 0.35), 0 0 55px rgba(0, 153, 255, 0.08);
            opacity: 1;
            border-bottom: 1px solid rgba(0, 153, 255, 0.25);
        }

        .thank-you-icon {
            width: 72px;
            height: 72px;
            margin: 2rem auto 1.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #ffffff;
            background: linear-gradient(135deg, #0099ff 0%, #7c3aed 100%);
            border-radius: 50%;
            box-shadow: 0 15px 40px rgba(0, 153, 255, 0.28);
        }

        .thank-you-icon svg {
            width: 2.2rem;
            height: 2.2rem;
            fill: currentColor;
        }

        .thank-you-kicker {
            margin: 0 0 0.75rem;
            color: #0099ff;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            font-size: 0.82rem;
        }

        .thank-you-panel h1 {
            color: #ffffff;
            font-size: clamp(2rem, 5vw, 3rem);
            line-height: 1.15;
            margin-bottom: 1rem;
        }

        .thank-you-panel p {
            color: #b0b0b0;
            line-height: 1.8;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .thank-you-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
            margin-top: 2rem;
        }

        .thank-you-primary,
        .secondary-cta {
            display: inline-block;
            padding: 1rem 1.5rem;
            min-width: 180px;
            text-align: center;
            border-radius: 999px;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .thank-you-primary {
            color: #ffffff;
            text-decoration: none;
            border: 1px solid transparent;
            background: linear-gradient(135deg, #0099ff 0%, #7c3aed 100%);
            box-shadow: 0 10px 30px rgba(0, 153, 255, 0.24);
        }

        .thank-you-primary:visited {
            color: #ffffff;
        }

        .secondary-cta {
            color: #ffffff;
            text-decoration: none;
            border: 1px solid rgba(0, 153, 255, 0.35);
            background: rgba(0, 153, 255, 0.08);
        }

        .thank-you-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 16px 40px rgba(124, 58, 237, 0.34);
        }

        .secondary-cta:hover {
            background: rgba(0, 153, 255, 0.16);
            border-color: rgba(124, 58, 237, 0.6);
            transform: translateY(-2px);
        }

        .social-links {
            display: flex;
            justify-content: center;
            gap: 2rem;
            margin-top: 1.5rem;
        }

        .social-links a {
            color: #0099ff;
            text-decoration: none;
            transition: all 0.3s ease;
            font-weight: 500;
        }

        .social-links a:hover {
            color: #00d4ff;
            text-decoration: underline;
        }

        /* Animations */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes fadeInDown {
            from {
                opacity: 0;
                transform: translateY(-20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes scaleIn {
            from {
                opacity: 0;
                transform: scale(0.95);
            }
            to {
                opacity: 1;
                transform: scale(1);
            }
        }

        .fade-in-up {
            animation: fadeInUp 0.8s ease-out forwards;
        }

        .fade-in-down {
            animation: fadeInDown 0.6s ease-out forwards;
        }

        .scale-in {
            animation: scaleIn 0.8s ease-out forwards;
        }

        /* Stagger animations */
        .service-card.fade-in-up,
        .project-card.fade-in-up,
        .benefit-item.fade-in-up {
            animation-delay: calc(var(--index) * 0.1s);
        }

        section {
            opacity: 0;
        }

        section.in-view {
            opacity: 1;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .back-to-top {
                bottom: 1.5rem;
                right: 1.5rem;
                width: 45px;
                height: 45px;
                font-size: 1.2rem;
            }

            .whatsapp-button {
                bottom: 1.5rem;
                left: 1.5rem;
                width: 45px;
                height: 45px;
            }

            nav {
                padding: 0.85rem 1rem;
            }

            nav ul {
                gap: 1.2rem;
                max-width: 100%;
                overflow-x: auto;
                padding-bottom: 0.25rem;
                scrollbar-width: none;
            }

            nav ul::-webkit-scrollbar {
                display: none;
            }

            nav a {
                white-space: nowrap;
                font-size: 0.9rem;
            }

            .hero {
                margin-top: 70px;
                padding: 5rem 1.5rem;
            }

            .profile-image {
                width: 100px;
                margin-bottom: 1.5rem;
            }

            .hero h1 {
                font-size: 2rem;
            }

            .hero p {
                font-size: 1rem;
            }

            .social-buttons {
                gap: 0.8rem;
            }

            .social-btn {
                width: 45px;
                height: 45px;
                font-size: 1.2rem;
            }

            h2 {
                font-size: 1.8rem;
            }

            .about-content {
                grid-template-columns: 1fr;
            }

            .about-image {
                padding: 0.75rem;
            }

            .contact-container {
                grid-template-columns: 1fr;
            }

            .skills-list {
                grid-template-columns: 1fr;
            }

            .services-grid {
                grid-template-columns: 1fr;
            }

            .projects-grid {
                grid-template-columns: 1fr;
            }

            .benefits-grid {
                grid-template-columns: 1fr;
            }

            .expect-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            nav {
                padding: 0.75rem 1rem;
                flex-direction: column;
                align-items: flex-start;
                gap: 0.65rem;
            }

            .logo {
                font-size: 1.2rem;
            }

            nav ul {
                width: 100%;
                gap: 1rem;
            }

            nav a {
                font-size: 0.82rem;
            }

            .hero {
                margin-top: 105px;
                padding: 3rem 1rem;
            }

            .hero h1 {
                font-size: 1.5rem;
            }

            .hero p {
                font-size: 0.95rem;
            }

            h2 {
                font-size: 1.5rem;
            }

            .service-card,
            .project-card,
            .benefit-item,
            .contact-info {
                padding: 1.5rem;
            }

            .submit-button {
                font-size: 0.95rem;
                padding: 0.85rem;
            }
        }

        /* Cybersecurity portfolio theme refinements */
        :root {
            --cyber-bg: #05080d;
            --cyber-bg-soft: #09111c;
            --cyber-panel: rgba(9, 17, 28, 0.82);
            --cyber-panel-strong: rgba(12, 22, 35, 0.94);
            --cyber-text: #e6f1ff;
            --cyber-muted: #8fa3b8;
            --cyber-cyan: #00d4ff;
            --cyber-blue: #0099ff;
            --cyber-green: #36f5a2;
            --cyber-violet: #7c3aed;
            --cyber-line: rgba(0, 212, 255, 0.18);
        }

        body {
            color: var(--cyber-text);
            background:
                linear-gradient(rgba(0, 212, 255, 0.035) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 212, 255, 0.035) 1px, transparent 1px),
                radial-gradient(circle at 8% 0%, rgba(54, 245, 162, 0.09), transparent 28rem),
                radial-gradient(circle at 92% 12%, rgba(0, 153, 255, 0.12), transparent 32rem),
                var(--cyber-bg);
            background-size: 44px 44px, 44px 44px, auto, auto, auto;
        }

        header {
            background-color: rgba(5, 8, 13, 0.92);
            border-bottom-color: var(--cyber-line);
        }

        .logo {
            background: linear-gradient(135deg, var(--cyber-green) 0%, var(--cyber-cyan) 48%, var(--cyber-violet) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            letter-spacing: 0;
        }

        nav a::after {
            background: linear-gradient(90deg, var(--cyber-green) 0%, var(--cyber-cyan) 100%);
        }

        .hero {
            background:
                linear-gradient(rgba(54, 245, 162, 0.05) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 212, 255, 0.055) 1px, transparent 1px),
                radial-gradient(circle at 50% 0%, rgba(0, 212, 255, 0.22), transparent 30rem),
                linear-gradient(135deg, #06111d 0%, #071b2b 48%, #100b21 100%);
            background-size: 34px 34px, 34px 34px, auto, auto;
        }

        .hero::before {
            background:
                linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 16%),
                repeating-linear-gradient(0deg, rgba(230, 241, 255, 0.035) 0, rgba(230, 241, 255, 0.035) 1px, transparent 1px, transparent 7px);
            mix-blend-mode: screen;
            opacity: 0.7;
        }

        .hero h1 {
            letter-spacing: 0;
            text-shadow: 0 0 34px rgba(0, 212, 255, 0.24);
        }

        .hero p,
        .section-subtitle,
        .about-text p,
        .service-card p,
        .project-info p,
        .benefit-item p,
        .expect-item p,
        .process-step p,
        .contact-item p,
        .thank-you-panel p,
        footer p {
            color: var(--cyber-muted);
        }

        .hero .cta-button,
        .submit-button,
        .footer-cta,
        .thank-you-primary,
        .thank-you-icon,
        .back-to-top {
            background: linear-gradient(135deg, var(--cyber-green) 0%, var(--cyber-cyan) 42%, var(--cyber-violet) 100%);
            box-shadow: 0 12px 34px rgba(0, 212, 255, 0.22);
        }

        .hero .cta-button::before {
            background: linear-gradient(135deg, #7cffcc 0%, var(--cyber-cyan) 45%, #a77cff 100%);
        }

        .profile-image {
            border-color: rgba(54, 245, 162, 0.48);
            box-shadow: 0 0 34px rgba(54, 245, 162, 0.18), 0 0 70px rgba(0, 212, 255, 0.12);
        }

        .social-btn,
        .contact-info,
        .thank-you-panel {
            background: var(--cyber-panel);
            border-color: var(--cyber-line);
        }

        .service-card,
        .project-card,
        .benefit-item,
        .expect-item,
        .process-step {
            background: var(--cyber-panel);
            border-color: var(--cyber-line);
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
        }

        .service-card,
        .expect-item {
            border-left-color: var(--cyber-green);
        }

        .service-card:hover,
        .project-card:hover,
        .benefit-item:hover,
        .expect-item:hover,
        .process-step:hover {
            background: var(--cyber-panel-strong);
            border-color: rgba(54, 245, 162, 0.38);
            box-shadow: 0 18px 48px rgba(0, 212, 255, 0.14);
        }

        .skills-list li {
            background: rgba(54, 245, 162, 0.055);
            border-left-color: var(--cyber-green);
        }

        .skills-list li:hover {
            background: rgba(54, 245, 162, 0.11);
        }

        .service-list li::before {
            background: var(--cyber-green);
            box-shadow: 0 0 12px rgba(54, 245, 162, 0.68);
        }

        .tools-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.5rem;
        }

        .tool-group {
            padding: 2rem;
            background: var(--cyber-panel);
            border: 1px solid var(--cyber-line);
            border-radius: 12px;
            position: relative;
            overflow: hidden;
            box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.03);
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .tool-group::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(54, 245, 162, 0.08), transparent 45%);
            pointer-events: none;
        }

        .tool-group:hover {
            transform: translateY(-8px);
            background: var(--cyber-panel-strong);
            border-color: rgba(54, 245, 162, 0.38);
            box-shadow: 0 18px 48px rgba(0, 212, 255, 0.14);
        }

        .tool-group h3 {
            color: #ffffff;
            font-size: 1.15rem;
            margin-bottom: 1rem;
            position: relative;
            z-index: 1;
        }

        .tool-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.65rem;
            position: relative;
            z-index: 1;
        }

        .tool-list span {
            display: inline-flex;
            align-items: center;
            min-height: 2.25rem;
            padding: 0.45rem 0.8rem;
            color: var(--cyber-green);
            background: rgba(54, 245, 162, 0.08);
            border: 1px solid rgba(54, 245, 162, 0.25);
            border-radius: 999px;
            font-size: 0.88rem;
            font-weight: 600;
        }

        .project-image {
            background:
                linear-gradient(rgba(54, 245, 162, 0.08) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 212, 255, 0.08) 1px, transparent 1px),
                linear-gradient(135deg, rgba(0, 212, 255, 0.18), rgba(124, 58, 237, 0.18));
            background-size: 24px 24px, 24px 24px, auto;
        }

        .tag {
            color: var(--cyber-green);
            background: rgba(54, 245, 162, 0.08);
            border-color: rgba(54, 245, 162, 0.28);
        }

        .project-actions a,
        .contact-item a,
        .social-links a,
        .contact-social-block h4,
        .thank-you-kicker,
        .benefit-icon,
        .process-step span {
            color: var(--cyber-cyan);
        }

        .form-group input,
        .form-group textarea {
            background: rgba(5, 8, 13, 0.72);
            border-color: var(--cyber-line);
        }

        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--cyber-green);
            background: rgba(9, 17, 28, 0.92);
            box-shadow: 0 0 0 3px rgba(54, 245, 162, 0.12);
        }

        footer {
            background:
                linear-gradient(180deg, rgba(5, 8, 13, 0.96) 0%, rgba(9, 17, 28, 0.98) 100%);
            border-top-color: var(--cyber-line);
        }

        .thank-you-page {
            background:
                linear-gradient(rgba(54, 245, 162, 0.05) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 212, 255, 0.055) 1px, transparent 1px),
                radial-gradient(circle at 50% 0%, rgba(0, 212, 255, 0.2), transparent 30rem),
                var(--cyber-bg);
            background-size: 34px 34px, 34px 34px, auto, auto;
        }