* {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: 'Inter', 'Segoe UI', sans-serif;
    }

    :root {
        --primary-color: #3498db;
        --secondary-color: #2980b9;
        --text-primary: #2c3e50;
        --text-secondary: #34495e;
        --bg-gradient: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
        --card-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
        --transition-speed: 0.3s;
    }

    body {
        background: var(--bg-gradient);
        min-height: 100vh;
        min-width: 350px;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 2rem;
        color: var(--text-primary);
        line-height: 1.6;
        overflow-x: hidden;
    }

    main {
        position: relative;
        width: 100%;
        min-width: 320px;
        max-width: 800px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    header {
        text-align: center;
        margin-bottom: 2rem;
        width: 100%;
    }

    h1 {
        font-size: clamp(2rem, 5vw, 2.5rem);
        margin-bottom: 0.5rem;
        text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.1);
    }

    .subtitle {
        font-size: clamp(1rem, 3vw, 1.2rem);
        margin-bottom: 1.5rem;
        color: var(--text-secondary);
    }

    .flip-button {
        background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        color: white;
        border: none;
        padding: 1rem 2rem;
        font-size: 1.1rem;
        border-radius: 50px;
        cursor: pointer;
        transition: all var(--transition-speed) ease;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        margin-bottom: 2rem;
        font-weight: 500;
    }

    .flip-button:hover,
    .flip-button:focus {
        transform: translateY(-3px);
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
        background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
        outline: none;
    }

    .scene {
        position: relative;
        width: 100%;
        perspective: 3000px;
        min-height: 100%;
    }

    .cv-content {
        position: relative;
        width: 100%;
        transform-style: preserve-3d;
        transition: transform 0.6s;
    }

    .cv-face {
        width: 100%;
        background: white;
        padding: 2rem;
        border-radius: 10px;
        box-shadow: var(--card-shadow);
        backface-visibility: hidden;
        -webkit-backface-visibility: hidden;
    }

    .cv-face.front {
        position: relative;
    }

    .cv-face.back {
        position: absolute;
        top: 0;
        left: 0;
        transform: rotateY(180deg);
    }

    .cv-content.flipped {
        transform: rotateY(180deg);
    }

    .cv-section {
        margin-bottom: 2rem;
    }

    .cv-section h2 {
        color: var(--primary-color);
        border-bottom: 2px solid var(--primary-color);
        padding-bottom: 0.5rem;
        margin-bottom: 1rem;
        font-size: clamp(1.3rem, 4vw, 1.5rem);
    }

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

    .cv-item h3 {
        color: var(--text-primary);
        margin-bottom: 0.3rem;
        font-size: clamp(1.1rem, 3vw, 1.2rem);
    }

    .cv-item .date {
        color: #7f8c8d;
        font-style: italic;
        margin-bottom: 0.5rem;
        font-size: 0.9rem;
    }

    .cv-item p {
        color: var(--text-secondary);
        line-height: 1.6;
        margin-bottom: 0.5rem;
    }

    .skills {
        display: flex;
        flex-wrap: wrap;
        gap: 0.8rem;
    }

    .skill {
        background-color: var(--primary-color);
        color: white;
        padding: 0.5rem 1rem;
        border-radius: 20px;
        font-size: 0.9rem;
        transition: all var(--transition-speed) ease;
        font-weight: 500;
    }

    .skill:hover {
        transform: translateY(-2px);
        background-color: var(--secondary-color);
    }

    .bg-animation {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        overflow: hidden;
        pointer-events: none;
    }

    .bg-bubble {
        position: absolute;
        border-radius: 50%;
        background: rgba(255, 255, 255, 0.3);
        animation: float 8s infinite ease-in-out;
    }

    @keyframes float {
        0%, 100% {
            transform: translateY(0) rotate(0deg);
            opacity: 0.8;
        }
        50% {
            transform: translateY(-20px) rotate(180deg);
            opacity: 0.5;
        }
    }

    .bg-bubble:nth-child(1) { width: 80px; height: 80px; left: 10%; top: 10%; }
    .bg-bubble:nth-child(2) { width: 120px; height: 120px; left: 80%; top: 20%; animation-delay: 1s; }
    .bg-bubble:nth-child(3) { width: 60px; height: 60px; left: 30%; top: 70%; animation-delay: 2s; }
    .bg-bubble:nth-child(4) { width: 100px; height: 100px; left: 70%; top: 80%; animation-delay: 3s; }

    footer {
        margin-top: 2rem;
        color: #7f8c8d;
        text-align: center;
        font-size: 0.9rem;
    }

    .lanyard {
        position: fixed;
        top: -20px;
        right: clamp(20px, 5vw, 50px);
        width: min(300px, 30vw);
        height: min(400px, 40vh);
        transform-origin: 50% 0;
        pointer-events: none;
        animation: lanyardSway 3s ease-in-out infinite;
        z-index: 1000;
    }

    .badge {
        position: absolute;
        top: min(280px, 30vh);
        left: 50%;
        transform: translateX(-50%);
        width: min(280px, 28vw);
        height: min(200px, 20vh);
        pointer-events: auto;
        cursor: pointer;
    }

    .badge-image {
        width: min(160px, 16vw);
        height: min(160px, 16vw);
        object-fit: cover;
        border-radius: 5px;
    }

    @media (min-width: 2000px) {
        .lanyard {
            right: calc(50vw - 950px);
        }
    }

    .lanyard-string {
        position: absolute;
        top: 0;
        left: 50%;
        width: 25px;
        height: 300px;
        background: linear-gradient(90deg, #003366, #0055a4);
        transform-origin: 50% 0;
        border-radius: 4px;
        pointer-events: auto;
        cursor: pointer;
        display: flex;
        justify-content: center;
        align-items: center;
        color: white;
        font-size: 12px;
        text-transform: uppercase;
        overflow: hidden;
    }

    .lanyard-string::before {
        content: 'University • of • Technology • Opole ';
        position: absolute;
        white-space: nowrap;
        transform: rotate(90deg);
        color: white;
        opacity: 0.9;
    }

    .badge {
        position: absolute;
        top: 280px;
        left: 50%;
        transform: translateX(-50%);
        width: 280px;
        height: 200px;
        pointer-events: auto;
        cursor: pointer;
    }

    .badge-content {
        transform-origin: center;
        will-change: transform;
        background: white;
        border-radius: 8px;
        padding: 10px;
        box-shadow: 0 4px 15px rgba(0,0,0,0.1);
        display: flex;
        gap: 15px;
        height: 100%;
        border: 1px solid #eee;
    }

    .badge-image {
        width: 160px;
        height: 160px;
        object-fit: cover;
        border-radius: 5px;
    }

    .badge-text {
        flex: 1;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }

    .badge-text h3 {
        color: var(--primary-color);
        margin-bottom: 5px;
        font-size: 1.2rem;
    }

    .badge-text p {
        font-size: 0.9rem;
        color: var(--text-secondary);
        margin: 2px 0;
    }

    @keyframes lanyardSway {
        0%, 100% { transform: rotate(-1deg); }
        50% { transform: rotate(2deg); }
    }


    @media (max-width: 1200px) {
        .lanyard {
            right: 20px;
        }
    }

    @media (max-width: 900px) {
        .lanyard {
            display: none;
        }
    }
    @keyframes stringWave {
        0%, 100% { transform: rotate(-1deg) scaleY(1); }
        50% { transform: rotate(1deg) scaleY(0.98); }
    }

    @keyframes badgeTilt {
        0%, 100% { transform: rotate(0deg); }
        25% { transform: rotate(-2deg); }
        75% { transform: rotate(2deg); }
    }

    @media print {
        body { background: none; padding: 1cm; }
        .flip-button, .bg-animation { display: none; }
        .scene { box-shadow: none; }
        .skill { border: 1px solid var(--primary-color); }
    }

    @media (max-width: 768px) {
        body { padding: 1rem; }
        .cv-content { padding: 0.5rem; }
        .skills { gap: 0.5rem; }
        .skill { font-size: 0.8rem; padding: 0.4rem 0.8rem; }
    }

    @media (prefers-reduced-motion: reduce) {
        * {
            animation: none !important;
            transition: none !important;
        }
    }

    #main-title.animate, #subtitle.animate {
        animation: fadeInOut 0.5s ease-in-out;
    }

    @keyframes fadeInOut {
        0% {
            opacity: 0;
            transform: translateY(-10px);
        }
        100% {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .consent-text {
        font-size: 0.8rem;
        font-style: italic;
        color: var(--text-secondary);
        line-height: 1.4;
    }

    .data-consent-note {
        width: 100%;
        max-width: 800px;
        margin: 2rem auto;
        perspective: 1000px;
    }

    .note-paper {
        position: relative;
        transform-style: preserve-3d;
        transition: transform 0.6s;
    }

    .note-content {
        background: #fffdf7;
        padding: 2rem;
        border-radius: 8px;
        box-shadow: 0 4px 15px rgba(0,0,0,0.1);
        position: relative;
        backface-visibility: hidden;
    }

    .back-note {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        transform: rotateY(180deg);
    }

    .paper-clip {
        position: absolute;
        top: -10px;
        left: 20px;
        width: 50px;
        height: 25px;
        border: 3px solid #7f8c8d;
        border-radius: 5px 5px 0 0;
        transform: rotate(-5deg);
    }

    .paper-clip::after {
        content: '';
        position: absolute;
        bottom: -3px;
        left: 5px;
        width: 35px;
        height: 15px;
        border-left: 3px solid #7f8c8d;
        border-right: 3px solid #7f8c8d;
        border-radius: 0 0 5px 5px;
    }

    .handwritten {
        font-family: 'Segoe Script', cursive;
        color: #2c3e50;
        font-size: 1.5rem;
        margin-bottom: 1rem;
        text-align: center;
    }

    .signature {
        font-family: 'Segoe Script', cursive;
        color: #2c3e50;
        font-size: 1.2rem;
        text-align: right;
        margin-top: 1rem;
        font-style: italic;
    }

    .cv-content.flipped + .data-consent-note .note-paper {
        transform: rotateY(180deg);
    }
    
    .note-paper.flipped {
        transform: rotateY(180deg);
    }

    @media (max-width: 768px) {
        .data-consent-note {
            padding: 0 1rem;
        }
    }