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

:root {
    --bg-primary: #0a0e27;
    --bg-secondary: #151a35;
    --bg-card: #1a2040;
    --text-primary: #e8eaf6;
    --text-secondary: #9ca3af;
    --accent-blue: #3b82f6;
    --accent-pink: #ec4899;
    --accent-purple: #8b5cf6;
    --border-color: #2d3550;
    --shadow: rgba(0, 0, 0, 0.3);
}

body.light-mode {
    --bg-primary: #f9fafb;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow: rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: all 0.3s ease;
    position: relative;
    overflow-x: hidden;
}

.floating-notes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.note {
    position: absolute;
    width: 20px;
    height: 20px;
    opacity: 0.1;
    animation: float 15s infinite ease-in-out;
}

.note:nth-child(1) {
    left: 10%;
    animation-delay: 0s;
    background: linear-gradient(45deg, var(--accent-blue), var(--accent-purple));
}

.note:nth-child(2) {
    left: 30%;
    animation-delay: 3s;
    background: linear-gradient(45deg, var(--accent-pink), var(--accent-blue));
}

.note:nth-child(3) {
    left: 50%;
    animation-delay: 6s;
    background: linear-gradient(45deg, var(--accent-purple), var(--accent-pink));
}

.note:nth-child(4) {
    left: 70%;
    animation-delay: 9s;
    background: linear-gradient(45deg, var(--accent-blue), var(--accent-pink));
}

.note:nth-child(5) {
    left: 90%;
    animation-delay: 12s;
    background: linear-gradient(45deg, var(--accent-pink), var(--accent-purple));
}

@keyframes float {
    0%, 100% {
        transform: translateY(100vh) rotate(0deg);
    }
    50% {
        transform: translateY(-10vh) rotate(180deg);
    }
}

header {
    background: var(--bg-secondary);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    position: relative;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.theme-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1.2rem;
    color: var(--text-primary);
}

.theme-toggle:hover {
    transform: scale(1.1);
    background: var(--accent-blue);
    color: white;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

.hero {
    text-align: center;
    padding: 4rem 0;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 2rem;
}

.btn-primary, .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-pink));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 3rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.stat-label {
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

footer {
    background: var(--bg-secondary);
    padding: 2rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
    position: relative;
    z-index: 100;
}

.footer-links {
    margin-top: 0.5rem;
    color: var(--text-secondary);
}

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

.fade-in {
    animation: fadeIn 0.8s ease;
}

.slide-up {
    animation: slideUp 0.8s ease;
}

.slide-up.delay-1 {
    animation-delay: 0.2s;
    opacity: 0;
    animation-fill-mode: forwards;
}

.slide-up.delay-2 {
    animation-delay: 0.4s;
    opacity: 0;
    animation-fill-mode: forwards;
}

.slide-up.delay-3 {
    animation-delay: 0.6s;
    opacity: 0;
    animation-fill-mode: forwards;
}

.slide-up.delay-4 {
    animation-delay: 0.8s;
    opacity: 0;
    animation-fill-mode: forwards;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

.progress-bar {
    width: 100%;
    height: 4px;
    background: var(--bg-card);
    position: sticky;
    top: 0;
    z-index: 99;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-pink));
    transition: width 0.3s ease;
    width: 20%;
}

.survey-container {
    max-width: 800px;
}

.survey-card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 3rem;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 40px var(--shadow);
}

.question-card {
    display: none;
}

.question-card.active {
    display: block;
    animation: slideUp 0.5s ease;
}

.question-number {
    color: var(--accent-blue);
    font-weight: 600;
    margin-bottom: 1rem;
}

.question-card h2 {
    font-size: 1.8rem;
    margin-bottom: 2rem;
}

.scale-options {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.scale-option {
    position: relative;
    cursor: pointer;
}

.scale-option input {
    display: none;
}

.scale-option span {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    font-weight: 600;
    transition: all 0.3s ease;
}

.scale-option small {
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.7rem;
    color: var(--text-secondary);
    white-space: nowrap;
}

.scale-option input:checked + span {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-pink));
    color: white;
    transform: scale(1.2);
}

.choice-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.choice-option {
    cursor: pointer;
}

.choice-option input {
    display: none;
}

.choice-option span {
    display: block;
    padding: 1rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s ease;
}

.choice-option input:checked + span {
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-pink));
    color: white;
    border-color: transparent;
}

.choice-option:hover span {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px var(--shadow);
}

.navigation-buttons {
    display: flex;
    justify-content: space-between;
    margin-top: 2rem;
    gap: 1rem;
}

.loader {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.loader.active {
    display: flex;
}

.loader-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-color);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loader p {
    margin-top: 1rem;
    color: var(--text-primary);
}

.thank-you {
    text-align: center;
    padding: 3rem 0;
}

.thank-you-icon {
    font-size: 5rem;
    color: var(--accent-blue);
    margin-bottom: 1rem;
}

.thank-you h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.quote {
    font-style: italic;
    color: var(--text-secondary);
    font-size: 1.2rem;
}

.results-section, .stats-section, .charts-section {
    margin: 3rem 0;
}

.results-section h2, .stats-section h2 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    text-align: center;
}

.user-answers {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid var(--border-color);
}

.answer-item {
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
}

.answer-item:last-child {
    border-bottom: none;
}

.answer-question {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.answer-value {
    color: var(--accent-blue);
    font-size: 1.1rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.stat-card {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--shadow);
}

.stat-icon {
    font-size: 3rem;
    color: var(--accent-pink);
    margin-bottom: 1rem;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-pink));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
}

.charts-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.chart-container {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid var(--border-color);
}

.chart-container h3 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.action-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 3rem;
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

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

    .stats {
        flex-direction: column;
        gap: 1.5rem;
    }

    .scale-options {
        flex-wrap: wrap;
    }

    .choice-options {
        grid-template-columns: 1fr;
    }

    .navigation-buttons {
        flex-direction: column;
    }

    .charts-section {
        grid-template-columns: 1fr;
    }

    .action-buttons {
        flex-direction: column;
    }

    .survey-card {
        padding: 1.5rem;
    }
}