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

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

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

header {
    text-align: center;
    padding: 60px 20px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    margin-bottom: 40px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

h1 {
    font-size: 3em;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.3em;
    color: #666;
    margin-bottom: 20px;
}

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

.nav-btn {
    padding: 12px 30px;
    border: none;
    border-radius: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.nav-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.nav-btn.active {
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

.section {
    display: none;
    background: white;
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    animation: fadeIn 0.5s ease;
}

.section.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

h2 {
    font-size: 2.2em;
    margin-bottom: 30px;
    color: #667eea;
    border-bottom: 3px solid #667eea;
    padding-bottom: 10px;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 30px;
    align-items: start;
}

.profile-img {
    width: 100%;
    max-width: 250px;
    height: 250px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid #667eea;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.skills {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.skill-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s ease;
}

.skill-card:hover {
    transform: scale(1.05);
}

.embed-container {
    margin: 20px 0;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.embed-container iframe {
    width: 100%;
    border: none;
    border-radius: 15px;
}

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

.project-card {
    background: #f8f9fa;
    border-radius: 15px;
    padding: 25px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.project-card:hover {
    border-color: #667eea;
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.project-card h3 {
    color: #667eea;
    margin-bottom: 15px;
}

.add-project-btn {
    padding: 15px 40px;
    background: #28a745;
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1.1em;
    cursor: pointer;
    margin-top: 20px;
    transition: all 0.3s ease;
}

.add-project-btn:hover {
    background: #218838;
    transform: scale(1.05);
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: white;
    padding: 40px;
    border-radius: 20px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #667eea;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1em;
    transition: border-color 0.3s ease;
}

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

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.modal-buttons {
    display: flex;
    gap: 15px;
    justify-content: flex-end;
    margin-top: 25px;
}

.btn-submit {
    padding: 12px 30px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-size: 1em;
    transition: all 0.3s ease;
}

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

.btn-cancel {
    padding: 12px 30px;
    background: #6c757d;
    color: white;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-size: 1em;
    transition: all 0.3s ease;
}

.btn-cancel:hover {
    background: #5a6268;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.contact-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 25px;
    border-radius: 15px;
    text-align: center;
}

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

.insight-card {
    background: #f8f9fa;
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 30px;
    border-left: 5px solid #667eea;
    transition: all 0.3s ease;
}

.insight-card:hover {
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
    transform: translateX(5px);
}

.insight-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.insight-title {
    color: #667eea;
    font-size: 1.5em;
    margin-bottom: 5px;
}

.insight-meta {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.meta-badge {
    padding: 5px 15px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 20px;
    font-size: 0.9em;
}

.insight-section {
    margin: 20px 0;
}

.insight-section h4 {
    color: #667eea;
    margin-bottom: 10px;
    font-size: 1.2em;
}

.insight-section p, .insight-section ul {
    color: #555;
    line-height: 1.8;
}

.insight-section ul {
    padding-left: 25px;
}

.insight-section li {
    margin-bottom: 8px;
}

.key-findings {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    border-radius: 10px;
    margin: 20px 0;
}

.key-findings h4 {
    color: white;
    margin-bottom: 15px;
}

.key-findings ul {
    list-style-type: none;
    padding-left: 0;
}

.key-findings li {
    padding-left: 25px;
    position: relative;
    margin-bottom: 10px;
}

.key-findings li:before {
    content: "✓";
    position: absolute;
    left: 0;
    font-weight: bold;
    font-size: 1.2em;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.stat-box {
    background: white;
    border: 2px solid #667eea;
    border-radius: 10px;
    padding: 20px;
    text-align: center;
}

.stat-number {
    font-size: 2.5em;
    font-weight: bold;
    color: #667eea;
    margin-bottom: 5px;
}

.stat-label {
    color: #666;
    font-size: 0.9em;
}

.recommendation-box {
    background: #fff3cd;
    border-left: 5px solid #ffc107;
    padding: 20px;
    border-radius: 10px;
    margin: 20px 0;
}

.recommendation-box h4 {
    color: #856404;
    margin-bottom: 10px;
}

.recommendation-box ul {
    color: #856404;
}

.add-insight-btn {
    padding: 15px 40px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1.1em;
    cursor: pointer;
    margin-top: 20px;
    transition: all 0.3s ease;
}

.add-insight-btn:hover {
    background: #764ba2;
    transform: scale(1.05);
}

.chart-section {
    margin: 25px 0;
}

.chart-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin: 20px 0;
}

.chart-card {
    background: white;
    border: 2px solid #e0e0e0;
    border-radius: 15px;
    padding: 20px;
    transition: all 0.3s ease;
}

.chart-card:hover {
    border-color: #667eea;
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.2);
    transform: translateY(-3px);
}

.chart-image {
    width: 100%;
    height: auto;
    border-radius: 10px;
    margin-bottom: 15px;
    object-fit: contain;
    max-height: 300px;
}

.chart-title {
    color: #667eea;
    font-size: 1.1em;
    font-weight: bold;
    margin-bottom: 10px;
}

.chart-description {
    color: #666;
    font-size: 0.95em;
    line-height: 1.6;
}

.upload-area {
    border: 2px dashed #667eea;
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.upload-area:hover {
    background: #e7e9fc;
    border-color: #764ba2;
}

.upload-area.dragover {
    background: #d4d8fc;
    border-color: #764ba2;
    transform: scale(1.02);
}

.upload-icon {
    font-size: 3em;
    color: #667eea;
    margin-bottom: 10px;
}

.chart-preview-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.chart-preview {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    border: 2px solid #e0e0e0;
}

.chart-preview img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    display: block;
}

.remove-chart {
    position: absolute;
    top: 5px;
    right: 5px;
    background: #dc3545;
    color: white;
    border: none;
    border-radius: 50%;
    width: 25px;
    height: 25px;
    cursor: pointer;
    font-size: 0.8em;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.remove-chart:hover {
    background: #c82333;
    transform: scale(1.1);
}

@media (max-width: 768px) {
    h1 {
        font-size: 2em;
    }

    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .profile-img {
        margin: 0 auto;
    }

    .insight-header {
        flex-direction: column;
    }
}