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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #63dcd3 0%, #239ffd 50%, #1e88e5 100%);
    min-height: 100vh;
    padding: 20px;
}

.invitation-container {
    max-width: 1000px;
    margin: 0 auto;
    background: white;
    border-radius: 25px;
    box-shadow: 0 25px 50px rgba(35,159,253,0.15);
    overflow: hidden;
    position: relative;
}

.header {
    background: linear-gradient(135deg, #63dcd3 0%, #239ffd 100%);
    color: white;
    padding: 50px 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background-image: 
        radial-gradient(circle at 25% 25%, rgba(255,255,255,0.1) 2px, transparent 2px),
        radial-gradient(circle at 75% 75%, rgba(255,255,255,0.05) 1px, transparent 1px);
    background-size: 60px 60px, 40px 40px;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateX(0px) translateY(0px); }
    33% { transform: translateX(30px) translateY(-30px); }
    66% { transform: translateX(-20px) translateY(20px); }
}

.wave-pattern {
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 800'%3E%3Cpath d='M0,400 Q300,350 600,400 T1200,400 L1200,0 L0,0 Z' fill='rgba(255,255,255,0.1)'/%3E%3Cpath d='M0,500 Q300,450 600,500 T1200,500 L1200,0 L0,0 Z' fill='rgba(255,255,255,0.05)'/%3E%3C/svg%3E");
    background-size: cover;
    opacity: 0.3;
}

.sonoscape-logo {
    margin-bottom: 15px;
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.sonoscape-logo img {
    max-height: 60px;
    width: auto;
    filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.3));
}

.seminar-title {
    font-size: 42px;
    font-weight: 900;
    margin: 25px 0;
    position: relative;
    z-index: 1;
    text-shadow: 3px 3px 6px rgba(0,0,0,0.4);
    line-height: 1.2;
}

.subtitle {
    font-size: 20px;
    opacity: 0.95;
    position: relative;
    z-index: 1;
    font-weight: 300;
}

.header-image {
    display: none;
}

.invitation-banner {
    width: 100%;
    text-align: center;
    background: linear-gradient(135deg, #f8feff 0%, #e6f7ff 100%);
    padding: 20px;
    border-bottom: 3px solid rgba(99,220,211,0.2);
}

.invitation-banner img {
    max-width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(35,159,253,0.2);
    transition: transform 0.3s ease;
}

.invitation-banner img:hover {
    transform: scale(1.02);
}

.content {
    padding: 50px 40px;
}

.event-info {
    background: linear-gradient(135deg, #63dcd3 0%, #239ffd 100%);
    color: white;
    padding: 35px;
    border-radius: 20px;
    margin-bottom: 40px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(35,159,253,0.3);
}

.datetime {
    font-size: 28px;
    font-weight: bold;
    margin-bottom: 15px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.2);
}

.date-details {
    font-size: 18px;
    opacity: 0.95;
    line-height: 1.4;
}

.highlights {
    margin: 40px 0;
}

.highlights h3 {
    color: #239ffd;
    font-size: 28px;
    margin-bottom: 30px;
    text-align: center;
    font-weight: 700;
    position: relative;
}

.highlights h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, #63dcd3, #239ffd);
    border-radius: 2px;
}

.highlight-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.highlight-item {
    background: linear-gradient(135deg, #63dcd3 0%, #239ffd 100%);
    color: white;
    padding: 30px 25px;
    border-radius: 18px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(35,159,253,0.2);
}

.highlight-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(35,159,253,0.4);
}

.highlight-icon {
    font-size: 36px;
    margin-bottom: 15px;
    filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.3));
}

.highlight-title {
    font-weight: bold;
    font-size: 18px;
    margin-bottom: 12px;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.2);
}

.highlight-desc {
    font-size: 15px;
    opacity: 0.95;
    line-height: 1.4;
}

.video-section {
    background: linear-gradient(135deg, #f0fdfc 0%, #e0f7ff 100%);
    padding: 40px;
    border-radius: 25px;
    margin: 40px 0;
    border: 2px solid rgba(99,220,211,0.2);
    text-align: center;
}

.video-section h3 {
    color: #239ffd;
    font-size: 28px;
    margin-bottom: 30px;
    text-align: center;
    font-weight: 700;
}

.video-container {
    position: relative;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(35,159,253,0.2);
}

.video-container iframe {
    width: 100%;
    height: 450px;
    border: none;
}

.micro-f-section {
    background: linear-gradient(135deg, #f0fdfc 0%, #e0f7ff 100%);
    padding: 40px;
    border-radius: 25px;
    margin: 40px 0;
    border: 2px solid rgba(99,220,211,0.2);
    position: relative;
}

.micro-f-section h3 {
    color: #239ffd;
    font-size: 32px;
    margin-bottom: 20px;
    text-align: center;
    font-weight: 700;
}

.micro-f-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    margin-bottom: 40px;
}

.micro-f-text {
    font-size: 16px;
    line-height: 1.6;
    color: #333;
}

.micro-f-text h4 {
    color: #239ffd;
    font-size: 22px;
    margin: 20px 0 10px 0;
    font-weight: 600;
}

.micro-f-text p {
    margin-bottom: 15px;
}

.micro-f-image {
    text-align: center;
}

.micro-f-image img {
    max-width: 100%;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(35,159,253,0.15);
}

.micro-f-image p {
    font-size: 14px;
    color: #666;
    margin-top: 10px;
    font-style: italic;
}

.modes-section {
    background: linear-gradient(135deg, #fafffe 0%, #f0f9ff 100%);
    padding: 35px;
    border-radius: 20px;
    border: 1px solid rgba(99,220,211,0.3);
}

.modes-section h4 {
    color: #239ffd;
    font-size: 24px;
    margin-bottom: 25px;
    text-align: center;
    font-weight: 600;
}

.modes-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    align-items: center;
}

.modes-text {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.mode-item {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(35,159,253,0.1);
    border-left: 4px solid #63dcd3;
}

.mode-item h5 {
    color: #239ffd;
    font-size: 18px;
    margin-bottom: 10px;
    font-weight: 600;
}

.mode-item p {
    color: #666;
    font-size: 14px;
    line-height: 1.5;
}

.modes-image {
    text-align: center;
}

.modes-image img {
    max-width: 100%;
    border-radius: 15px;
    box-shadow: 0 10px 25px rgba(35,159,253,0.15);
}

.modes-image p {
    font-size: 14px;
    color: #666;
    margin-top: 10px;
    font-style: italic;
}

.agenda {
    background: linear-gradient(135deg, #f8feff 0%, #e6f7ff 100%);
    padding: 35px;
    border-radius: 20px;
    margin: 40px 0;
    border: 2px solid rgba(99,220,211,0.1);
}

.agenda h3 {
    color: #239ffd;
    font-size: 24px;
    margin-bottom: 25px;
    text-align: center;
    font-weight: 700;
}

.agenda-item {
    display: flex;
    align-items: center;
    padding: 18px 0;
    border-bottom: 1px solid rgba(35,159,253,0.15);
    transition: background 0.3s ease;
}

.agenda-item:hover {
    background: rgba(99,220,211,0.05);
    padding-left: 10px;
    border-radius: 10px;
}

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

.agenda-time {
    background: linear-gradient(135deg, #63dcd3, #239ffd);
    color: white;
    padding: 8px 16px;
    border-radius: 25px;
    font-weight: bold;
    font-size: 15px;
    min-width: 90px;
    text-align: center;
    margin-right: 20px;
    box-shadow: 0 4px 12px rgba(35,159,253,0.3);
}

.agenda-content {
    flex: 1;
    font-size: 16px;
    color: #333;
    line-height: 1.5;
}

.cta-section {
    text-align: center;
    margin-top: 50px;
    padding: 40px;
    background: linear-gradient(135deg, #239ffd 0%, #1e88e5 100%);
    border-radius: 20px;
    color: white;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Ccircle cx='50' cy='50' r='2' fill='rgba(255,255,255,0.1)'/%3E%3Ccircle cx='20' cy='20' r='1' fill='rgba(255,255,255,0.05)'/%3E%3Ccircle cx='80' cy='80' r='1.5' fill='rgba(255,255,255,0.08)'/%3E%3C/svg%3E");
    background-size: 80px 80px;
}

.cta-section h3 {
    font-size: 32px;
    margin-bottom: 15px;
    position: relative;
    z-index: 1;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.cta-section p {
    font-size: 18px;
    margin-bottom: 25px;
    position: relative;
    z-index: 1;
    opacity: 0.95;
}

.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, #63dcd3 0%, #4dd0c7 100%);
    color: white;
    padding: 18px 35px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    font-size: 16px;
    margin: 15px 12px;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(99,220,211,0.3);
    position: relative;
    z-index: 1;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(99,220,211,0.4);
    background: linear-gradient(135deg, #4dd0c7 0%, #63dcd3 100%);
}

.benefits {
    margin-top: 25px;
    font-size: 16px;
    opacity: 0.95;
    position: relative;
    z-index: 1;
}

.footer {
    background: linear-gradient(135deg, #1e88e5 0%, #1565c0 100%);
    color: white;
    padding: 35px 40px;
    text-align: center;
}

.footer-logo {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 15px;
}

.contact-info {
    font-size: 15px;
    opacity: 0.9;
    margin-top: 15px;
    line-height: 1.6;
}

/* Responsive Design */
@media (max-width: 768px) {
    .invitation-container {
        margin: 10px;
        border-radius: 20px;
    }
    
    .header {
        padding: 40px 25px;
    }
    
    .invitation-banner {
        padding: 15px;
    }
    
    .seminar-title {
        font-size: 32px;
    }
    
    .content {
        padding: 40px 25px;
    }
    
    .highlight-grid {
        grid-template-columns: 1fr;
    }
    
    .micro-f-content {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .modes-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .video-container iframe {
        height: 250px;
    }
    
    .agenda {
        padding: 25px;
    }
    
    .agenda-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .agenda-time {
        margin-right: 0;
    }
    
    .cta-section {
        padding: 30px 25px;
    }
    
    .footer {
        padding: 25px;
    }
}

@media (max-width: 480px) {
    .video-container iframe {
        height: 200px;
    }
    
    .seminar-title {
        font-size: 28px;
    }
    
    .micro-f-section {
        padding: 25px;
    }
    
    .video-section {
        padding: 25px;
    }
}
.registration-section {
    background: linear-gradient(135deg, #ffffff 0%, #f8feff 100%);
    padding: 40px;
    border-radius: 25px;
    margin: 40px 0;
    border: 2px solid rgba(99,220,211,0.3);
    box-shadow: 0 10px 30px rgba(35,159,253,0.1);
    text-align: center;
}

.registration-section h3 {
    color: #239ffd;
    font-size: 32px;
    margin-bottom: 15px;
    font-weight: 700;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

.registration-section p {
    color: #666;
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.registration-form {
    max-width: 500px;
    margin: 0 auto;
    text-align: left;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    color: #239ffd;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

.form-group input {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid rgba(99,220,211,0.3);
    border-radius: 50px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: white;
    box-shadow: 0 2px 10px rgba(35,159,253,0.05);
}

.form-group input:focus {
    outline: none;
    border-color: #63dcd3;
    box-shadow: 0 0 0 3px rgba(99,220,211,0.2);
    transform: translateY(-2px);
}

.form-group input::placeholder {
    color: #999;
    font-style: italic;
}

.register-button {
    width: 100%;
    background: linear-gradient(135deg, #63dcd3 0%, #239ffd 100%);
    color: white;
    padding: 18px 30px;
    border: none;
    border-radius: 50px;
    font-size: 18px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(35,159,253,0.3);
    margin-top: 15px;
}

.register-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(35,159,253,0.4);
    background: linear-gradient(135deg, #239ffd 0%, #63dcd3 100%);
}

.register-button:active {
    transform: translateY(-1px);
    text-align: center;
    margin-top: 50px;
    padding: 40px;
    background: linear-gradient(135deg, #239ffd 0%, #1e88e5 100%);
    border-radius: 20px;
    color: white;
    position: relative;
    overflow: hidden;
}