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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f5f5f5;
    color: #333;
}

/* Top Navigation - Search Bar */
.top-nav {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.search-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    gap: 10px;
}

.search-input {
    flex: 1;
    padding: 12px 20px;
    border: none;
    border-radius: 25px;
    font-size: 16px;
    outline: none;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.search-btn {
    padding: 12px 30px;
    background: white;
    border: none;
    border-radius: 25px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.search-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}
.search-result {
    max-width: 800px;
    margin: 15px auto 0;
    padding: 15px;
    background: rgba(255,255,255,0.95);
    border-radius: 10px;
    display: none;
}

.search-result.show {
    display: block;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Main Content - Split View */
.main-content {
    display: flex;
    height: calc(100vh - 100px);
    gap: 20px;
    padding: 20px;
}

/* Left Panel - Form */
.left-panel {
    flex: 1;
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    overflow-y: auto;
}
.left-panel h2 {
    color: #667eea;
    margin-bottom: 25px;
    font-size: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 30px;
}
.btn-primary,
.btn-secondary,
.btn-fallback {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    flex: 1;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #f0f0f0;
    color: #555;
    flex: 1;
}

.btn-secondary:hover {
    background: #e0e0e0;
}

/* Right Panel - Reference Websites */
.right-panel {
    flex: 1;
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.tabs {
    display: flex;
    background: #f8f8f8;
    border-bottom: 2px solid #e0e0e0;
}

.tab-btn {
    flex: 1;
    padding: 15px;
    background: transparent;
    border: none;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    color: #666;
}

.tab-btn:hover {
    background: #efefef;
}

.tab-btn.active {
    background: white;
    color: #667eea;
    border-bottom: 3px solid #667eea;
}

.iframe-container {
    position: relative;
    flex: 1;
    overflow: hidden;
}

.reference-iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
    display: none;
}

.reference-iframe.active {
    display: block;
}
.iframe-fallback {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    padding: 30px;
    display: none;
}

.iframe-fallback p {
    margin-bottom: 20px;
    color: #666;
    font-size: 16px;
}

.btn-fallback {
    display: block;
    width: 100%;
    margin: 10px 0;
    background: #667eea;
    color: white;
}

.btn-fallback:hover {
    background: #764ba2;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .main-content {
        flex-direction: column;
        height: auto;
    }
    
    .left-panel,
    .right-panel {
        flex: none;
        height: 600px;
    }
}

@media (max-width: 768px) {
    .search-container {
        flex-direction: column;
    }
    
    .search-btn {
        width: 100%;
    }
    
    .form-actions {
        flex-direction: column;
    }
}