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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.meeting-card {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    overflow: hidden;
    position: relative;
    animation: fadeInUp 0.8s ease-out;
}

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

.meeting-header {
    position: relative;
    height: 400px;
    background: linear-gradient(45deg, #ff6b6b, #ffa726);
    overflow: hidden;
}

.meeting-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.meeting-image:hover {
    transform: scale(1.05);
}

.profile-image {
    position: absolute;
    top: 20px;
    left: 20px;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: 3px solid white;
    object-fit: cover;
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    z-index: 2;
}

.meeting-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(0,0,0,0.3), rgba(0,0,0,0.7));
    display: flex;
    align-items: flex-end;
    padding: 40px;
}

.meeting-title {
    color: white;
    font-size: 2.5rem;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    margin-bottom: 10px;
}

.meeting-status {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: bold;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.status-upcoming {
    background: #4CAF50;
    color: white;
}

.status-ongoing {
    background: #FF9800;
    color: white;
    animation: pulse 2s infinite;
}

.status-past {
    background: #757575;
    color: white;
}

@keyframes pulse {
    0% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
    100% {
        opacity: 1;
    }
}

.meeting-content {
    padding: 40px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.info-section {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 15px;
    border-left: 4px solid #667eea;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.info-section:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.info-title {
    font-size: 1.2rem;
    font-weight: bold;
    color: #667eea;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.info-content {
    color: #555;
    line-height: 1.8;
}

.date-time {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.date-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.date-icon {
    width: 50px;
    height: 35px;
    background: #667eea;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.location-info {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.location-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px;
    background: white;
    border-radius: 8px;
}

.authors-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.author-tag {
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    padding: 8px 16px;
    border-radius: 25px;
    font-weight: 500;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
    transition: transform 0.3s ease;
}

.author-tag:hover {
    transform: translateY(-2px);
}

.author-tag a {
    color: white;
    text-decoration: none;
}

.author-tag a:hover {
    text-decoration: underline;
}


.description {
    background: white;
    padding: 30px;
    border-radius: 15px;
    border: 1px solid #e0e0e0;
    margin-bottom: 30px;
}

.description h3 {
    color: #667eea;
    margin-bottom: 20px;
    font-size: 1.4rem;
}

.description p {
    color: #666;
    line-height: 1.8;
}

.price-section {
    background: linear-gradient(45deg, #4CAF50, #45a049);
    color: white;
    padding: 20px;
    border-radius: 15px;
    text-align: center;
    margin-bottom: 30px;
}

.price-section.paid {
    background: linear-gradient(45deg, #FF9800, #F57C00);
}

.price-amount {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 10px;
}

.registration-info {
    background: #e3f2fd;
    padding: 20px;
    border-radius: 15px;
    border-left: 4px solid #2196F3;
    margin-bottom: 30px;
}

.registration-info.closed {
    background: #ffebee;
    border-left-color: #f44336;
}

.action-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 30px;
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 25px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.btn-primary {
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
}

.btn-secondary {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

.countdown {
    text-align: center;
    margin: 30px 0;
}

.countdown-timer {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 15px;
}

.countdown-item {
    background: white;
    padding: 15px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    min-width: 80px;
}

.countdown-number {
    font-size: 2rem;
    font-weight: bold;
    color: #667eea;
}

.countdown-label {
    font-size: 0.9rem;
    color: #666;
    text-transform: uppercase;
}

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

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

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

    .countdown-timer {
        flex-wrap: wrap;
    }

    .profile-image {
        width: 80px;
        height: 80px;
        top: 15px;
        left: 15px;
    }
}
.ad-placeholder {
    border: 2px dashed #ccc;
    background-color: #f9f9f9;
    color: #333;
    text-align: center;
    padding: 30px 20px;
    font-size: 1.1rem;
    font-weight: 500;
    border-radius: 12px;
    box-shadow: inset 0 0 10px rgba(0,0,0,0.05);
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 20px;
    transition: background-color 0.3s;
}

.ad-placeholder:hover {
    background-color: #eef6ff;
}

.ad-button {
    display: inline-block;
    background-color: #007bff;
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.2s;
}

.ad-button:hover {
    background-color: #0056b3;
}