/* Reset und Base Styles */
* {
    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;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 30px;
    color: white;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

header p {
    font-size: 1.1em;
    opacity: 0.9;
}

/* Main Content */
main {
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    overflow: hidden;
}

section {
    padding: 30px;
}

section h2 {
    color: #4a5568;
    margin-bottom: 20px;
    font-size: 1.5em;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Input Section */
.input-section {
    border-bottom: 2px solid #e2e8f0;
}

#icalInput {
    width: 100%;
    min-height: 200px;
    padding: 15px;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    resize: vertical;
    transition: border-color 0.3s ease;
}

#icalInput:focus {
    border-color: #667eea;
    outline: none;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.button-group {
    display: flex;
    gap: 15px;
    margin-top: 20px;
    flex-wrap: wrap;
}

button {
    padding: 12px 25px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

#convertBtn {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
}

#convertBtn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

#clearBtn {
    background: linear-gradient(135deg, #f093fb, #f5576c);
    color: white;
}

#clearBtn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(245, 87, 108, 0.4);
}

#testBtn {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
    color: white;
}

#testBtn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(79, 172, 254, 0.4);
}

/* Meeting Card */
.meeting-card {
    background: linear-gradient(135deg, #f7fafc, #edf2f7);
    border-radius: 15px;
    padding: 25px;
    border-left: 5px solid #667eea;
}

.meeting-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid #e2e8f0;
}

.meeting-title {
    font-size: 1.8em;
    color: #2d3748;
    font-weight: 700;
}

.meeting-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.detail-item {
    background: white;
    padding: 15px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.detail-label {
    font-weight: 600;
    color: #4a5568;
    font-size: 0.9em;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.detail-value {
    font-size: 1.1em;
    color: #2d3748;
    word-break: break-all;
}

.meeting-link {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    text-decoration: none;
    padding: 15px 25px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-top: 20px;
}

.meeting-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
    text-decoration: none;
    color: white;
}

.meeting-link:active {
    transform: translateY(0);
}

/* Error Section */
.error-card {
    background: linear-gradient(135deg, #fed7d7, #feb2b2);
    border: 1px solid #fc8181;
    border-radius: 10px;
    padding: 20px;
    color: #742a2a;
}

.error-card h3 {
    margin-bottom: 10px;
}

/* Attendees */
.attendees-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
}

.attendee-tag {
    background: #667eea;
    color: white;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.9em;
    font-weight: 500;
    text-decoration: none;
}

/* Footer */
footer {
    text-align: center;
    margin-top: 30px;
    color: white;
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    header h1 {
        font-size: 2em;
    }
    
    section {
        padding: 20px;
    }
    
    .button-group {
        flex-direction: column;
    }
    
    button {
        justify-content: center;
    }
    
    .meeting-details {
        grid-template-columns: 1fr;
    }
}