/* CSS Custom Properties */
:root {
    /* Colors */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --background-primary: #ffffff;
    --background-secondary: #f9fafb;
    --background-dark: #111827;
    --border-color: #e5e7eb;
    --border-light: #f3f4f6;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-accent: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    transition: var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-image {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-fast);
}

.nav-link:hover::after {
    width: 100%;
}

/* EU Funding Banner */
.eu-banner {
    background-color: #ffffff;
    border-bottom: 1px solid var(--border-light);
    padding: var(--spacing-sm) 0;
    position: relative;
    z-index: 999;
    margin-top: 70px; /* Header height */
}

.eu-banner-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: center;
    align-items: center;
}

.eu-banner-image {
    width: 100%;
    max-width: 1200px;
    height: auto;
    display: block;
    object-fit: contain;
}

/* Hero Section */
.hero {
    padding-top: 120px;
    padding-bottom: var(--spacing-4xl);
    background-color: #e2e8f0; /* Placeholder color matching image background - prevents CLS */
    background-image: url('images/hero-background.webp');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    background-attachment: fixed; /* Parallax effect */
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
}

/* Modern browser support for AVIF format */
@supports (background-image: image-set(url('images/hero-background.avif') type('image/avif'))) {
    .hero {
        background-image: 
            image-set(
                url('images/hero-background.avif') type('image/avif'),
                url('images/hero-background.webp') type('image/webp'),
                url('images/hero-background.jpg') type('image/jpeg')
            );
    }
}

/* Fallback for older browsers */
@supports not (background-image: image-set(url('images/hero-background.webp') type('image/webp'))) {
    .hero {
        background-image: url('images/hero-background.jpg');
    }
}

/* Overlay for better text readability - gradient from left to right */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to right, rgba(255, 255, 255, 0.92) 0%, rgba(255, 255, 255, 0.85) 50%, rgba(255, 255, 255, 0.3) 100%);
    z-index: 0;
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.hero-content-wrapper {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3xl);
    text-align: center;
}

.hero-title {
    font-size: var(--font-size-6xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    text-align: center;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-2xl);
    line-height: 1.6;
    text-align: center;
}

.hero-form {
    max-width: 100%;
    margin: 0 auto;
}

/* Limit form width on desktop to not cover the human hand on the right */
@media (min-width: 769px) {
    .hero-form {
        max-width: 550px;
    }
}

/* Form Card */
.form-card {
    background: var(--background-primary);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.form-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.form-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.form-subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    font-size: var(--font-size-sm);
}

.registration-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-label {
    font-weight: 500;
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.form-input {
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    transition: var(--transition-fast);
    background: var(--background-primary);
    color: var(--text-primary);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(99 102 241 / 0.1);
}

.form-input::placeholder {
    color: var(--text-light);
}

.form-select {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.75rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.form-select:focus {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236366f1' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
}

.submit-btn {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    position: relative;
    overflow: hidden;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.submit-btn:active {
    transform: translateY(0);
}

.btn-icon {
    transition: var(--transition-fast);
}

.submit-btn:hover .btn-icon {
    transform: translateX(4px);
}

.form-footer {
    margin-top: var(--spacing-lg);
    text-align: center;
}

.privacy-text {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.privacy-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
}

.privacy-link:hover {
    text-decoration: underline;
}

/* Learn Section */
.learn-section {
    padding: var(--spacing-4xl) 0;
    background: var(--background-primary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-4xl);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.learn-content {
    margin-top: var(--spacing-3xl);
}

.learn-intro {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.learn-intro-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.learn-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.learn-item {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: var(--background-primary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

.learn-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.learn-item-icon {
    font-size: var(--font-size-3xl);
    flex-shrink: 0;
    margin-top: var(--spacing-xs);
}

.learn-item-content {
    flex: 1;
}

.learn-item-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.learn-item-description {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: var(--font-size-base);
}

.learn-practice {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-2xl);
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.learn-practice::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    pointer-events: none;
}

.learn-practice-icon {
    font-size: var(--font-size-4xl);
    flex-shrink: 0;
    margin-top: var(--spacing-xs);
}

.learn-practice-content {
    flex: 1;
}

.learn-practice-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.learn-practice-description {
    opacity: 0.9;
    line-height: 1.6;
    font-size: var(--font-size-base);
}

.learn-practice-certificate {
    background: linear-gradient(135deg, #FFD700 0%, #FFA500 50%, #FF8C00 100%);
    box-shadow: 0 10px 40px rgba(255, 215, 0, 0.4), 0 0 20px rgba(255, 215, 0, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    animation: certificateGlow 3s ease-in-out infinite;
}

.learn-practice-certificate::before {
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0.1) 100%);
}

@keyframes certificateGlow {
    0%, 100% {
        box-shadow: 0 10px 40px rgba(255, 215, 0, 0.4), 0 0 20px rgba(255, 215, 0, 0.2);
    }
    50% {
        box-shadow: 0 10px 50px rgba(255, 215, 0, 0.6), 0 0 30px rgba(255, 215, 0, 0.4);
    }
}

/* Requirements Section */
.requirements-section {
    padding: var(--spacing-4xl) 0;
    background: var(--background-primary);
}

.requirements-card {
    max-width: 800px;
    margin: var(--spacing-3xl) auto 0;
    background: #374151;
    padding: var(--spacing-3xl);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.requirements-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.requirements-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.requirement-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition-normal);
}

.requirement-item:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateX(8px);
}

.requirement-label {
    font-weight: 600;
    color: white;
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-xs);
}

.requirement-value {
    color: rgba(255, 255, 255, 0.9);
    font-size: var(--font-size-base);
    line-height: 1.6;
}

/* Locations Section */
.locations-section {
    padding: var(--spacing-4xl) 0;
    background: var(--background-secondary);
}

.location-container {
    max-width: 700px;
    margin: var(--spacing-3xl) auto 0;
    background: var(--background-primary);
    padding: var(--spacing-3xl);
    border-radius: var(--radius-2xl);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.location-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.location-content {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-light);
}

.location-icon-wrapper {
    flex-shrink: 0;
}

.location-logo {
    width: 120px;
    height: 90px;
    max-width: 120px;
    max-height: 90px;
    object-fit: contain;
    border-radius: var(--radius-md);
    background: white;
    padding: 8px;
    box-shadow: var(--shadow-sm);
}

.location-main-info {
    flex: 1;
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.location-name {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.location-city {
    color: var(--primary-color);
    font-weight: 600;
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.location-street {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-xs);
    line-height: 1.6;
}

.location-note {
    color: var(--text-light);
    font-size: var(--font-size-sm);
    font-style: italic;
}

.location-organizer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-light);
}

.location-organizer-details {
    text-align: left;
}

.location-extra-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
}

.location-extra-name {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.location-extra-street,
.location-extra-city {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.6;
}

.location-features {
    display: flex;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
    gap: var(--spacing-sm);
    justify-content: center;
}

.feature {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* CTA Section */
.cta-section {
    padding: var(--spacing-4xl) 0;
    background: var(--gradient-primary);
    color: white;
    text-align: center;
}

.cta-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
}

.cta-subtitle {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-2xl);
    opacity: 0.9;
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: white;
    color: var(--primary-color);
    padding: var(--spacing-lg) var(--spacing-2xl);
    border-radius: var(--radius-lg);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: var(--transition-fast);
    box-shadow: var(--shadow-md);
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Footer */
.footer {
    background: var(--background-dark);
    color: white;
    padding: var(--spacing-4xl) 0 var(--spacing-2xl);
}

.footer-content {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-2xl);
}

.footer-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.footer-description {
    color: #9ca3af;
    line-height: 1.6;
}

.footer-section {
    text-align: center;
    max-width: 600px;
}

.footer-subtitle {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.footer-section p {
    color: #9ca3af;
    margin-bottom: var(--spacing-sm);
}

.social-links {
    display: flex;
    gap: var(--spacing-lg);
}

.social-link {
    color: #9ca3af;
    text-decoration: none;
    transition: var(--transition-fast);
}

.social-link:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: var(--spacing-lg);
    text-align: center;
    color: #9ca3af;
}

/* Responsive Design */
@media (max-width: 768px) {
    /* EU Banner mobile optimization */
    .eu-banner {
        padding: var(--spacing-xs) 0;
    }
    
    .eu-banner-container {
        padding: 0 var(--spacing-md);
    }
    
    .eu-banner-image {
        max-width: 100%;
    }
    
    /* Optimize hero background for mobile - disable fixed attachment for better performance */
    .hero {
        background-attachment: scroll;
        padding-top: 100px;
        padding-bottom: var(--spacing-3xl);
    }
    
    /* Gradient overlay for mobile - more transparent to show image */
    .hero::before {
        background: linear-gradient(to bottom, rgba(255, 255, 255, 0.85) 0%, rgba(255, 255, 255, 0.7) 50%, rgba(255, 255, 255, 0.5) 100%);
    }
    
    .hero-container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-content-wrapper {
        max-width: 100%;
        gap: var(--spacing-2xl);
    }
    
    .hero-title {
        font-size: var(--font-size-4xl);
        text-align: center;
    }
    
    .hero-subtitle {
        text-align: center;
    }
    

    
    .learn-item {
        flex-direction: column;
        text-align: center;
    }
    
    .learn-practice {
        flex-direction: column;
        text-align: center;
    }
    
    .requirements-card {
        padding: var(--spacing-xl);
    }
    
    .requirement-item {
        padding: var(--spacing-md);
    }
    
    .location-container {
        padding: var(--spacing-xl);
    }
    
    .location-content {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }
    
    .location-icon-wrapper {
        margin-bottom: var(--spacing-md);
    }
    
    .nav-links {
        display: none;
    }
    
    .logo-image {
        width: 32px;
        height: 32px;
    }
    
    .logo-text {
        font-size: var(--font-size-lg);
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .cta-title {
        font-size: var(--font-size-3xl);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .form-card {
        padding: var(--spacing-lg);
    }
    
    .learn-card {
        padding: var(--spacing-lg);
    }
}

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

.hero-content,
.form-card,
.learn-card {
    animation: fadeInUp 0.6s ease-out;
}

/* Focus states for accessibility */
.form-input:focus,
.submit-btn:focus,
.nav-link:focus,
.cta-btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Loading state for form */
.submit-btn.loading {
    pointer-events: none;
    opacity: 0.7;
}

.submit-btn.loading .btn-text {
    opacity: 0;
}

.submit-btn.loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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