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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, #ff7272 0%, #7a9fff 100%);
    min-height: 100vh;
    color: #1a1a2e;
}

/* Navigation */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 2rem;
}

.logo-text {
    background: linear-gradient(135deg, #a4b2ed 0%, #f5576c 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #5a80df;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-link:hover, .nav-link.active {
    color: #667eea;
}

.upgrade-btn {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
    border: none;
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s;
}

.upgrade-btn:hover {
    transform: translateY(-2px);
}

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    min-height: calc(100vh - 150px);
}

.hero-section {
    text-align: center;
    margin-bottom: 3rem;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, #4ecdc4 0%, #00743e 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 1rem;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: #666;
}

/* Upload Section */
.upload-section {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
}

.upload-zone {
    border: 3px dashed #ddd;
    border-radius: 15px;
    padding: 4rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: #fafafa;
}

.upload-zone:hover {
    border-color: #667eea;
    background: #f0f0ff;
    transform: translateY(-2px);
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.upload-text {
    font-size: 1.2rem;
    color: #333;
    margin-bottom: 0.5rem;
}

.upload-or {
    color: #999;
    margin-bottom: 1.5rem;
}

.select-files-btn {
    background: #667eea;
    color: white;
    border: none;
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
}

.select-files-btn:hover {
    background: #764ba2;
    transform: translateY(-2px);
}

/* Cloud Options */
.cloud-options {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

.cloud-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: white;
    border: 1px solid #ddd;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.cloud-btn img {
    width: 20px;
    height: 20px;
}

.cloud-btn:hover {
    border-color: #667eea;
    background: #f8f9ff;
}

/* Progress Section */
.progress-section {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
    animation: slideIn 0.5s ease;
}

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

.progress-card h3 {
    margin-bottom: 1rem;
    color: #333;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.progress-percentage {
    font-size: 1.2rem;
    font-weight: 700;
    color: #667eea;
}

.progress-bar-container {
    background: #e0e0e0;
    border-radius: 10px;
    overflow: hidden;
    height: 8px;
    margin-bottom: 2rem;
}

.progress-bar-fill {
    background: linear-gradient(90deg, #667eea, #764ba2);
    width: 0%;
    height: 100%;
    transition: width 0.3s ease;
}

.progress-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.step {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem;
    background: #f8f9fa;
    border-radius: 10px;
    opacity: 0.5;
    transition: all 0.3s;
}

.step.active {
    opacity: 1;
    background: linear-gradient(135deg, #667eea15, #764ba215);
    border-left: 3px solid #667eea;
}

.step.completed {
    opacity: 1;
    background: #e8f5e9;
}

.step-icon {
    font-size: 1.5rem;
}

.step-text {
    flex: 1;
    font-size: 0.9rem;
    color: #666;
}

.step-status {
    width: 20px;
    height: 20px;
    border-radius: 50%;
}

.step.active .step-status {
    background: #667eea;
    animation: pulse 1s infinite;
}

.step.completed .step-status {
    background: #4caf50;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Results Section */
.results-section {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    animation: slideIn 0.5s ease;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.results-header h2 {
    font-size: 1.8rem;
    color: #333;
}

.action-buttons {
    display: flex;
    gap: 1rem;
}

.action-btn {
    padding: 0.6rem 1.2rem;
    background: #f0f0f0;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    font-weight: 500;
}

.action-btn:hover {
    background: #e0e0e0;
    transform: translateY(-2px);
}

.premium-btn {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.premium-btn:hover {
    background: linear-gradient(135deg, #f5576c 0%, #f093fb 100%);
}

/* Summary Stats */
.summary-stats {
    background: linear-gradient(135deg, #667eea15, #764ba215);
    padding: 1rem;
    border-radius: 10px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    color: #667eea;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0.5rem;
    border-bottom: 2px solid #e0e0e0;
    margin-bottom: 1.5rem;
}

.tab-btn {
    padding: 0.8rem 1.5rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    color: #666;
    transition: all 0.3s;
    position: relative;
}

.tab-btn:hover {
    color: #667eea;
}

.tab-btn.active {
    color: #667eea;
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: #667eea;
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Content Styles */
.summary-content, .structured-content, .keypoints-content {
    line-height: 1.8;
    color: #333;
    max-height: 500px;
    overflow-y: auto;
    padding-right: 1rem;
}

.summary-content p {
    margin-bottom: 1rem;
}

.summary-content h3 {
    margin: 1.5rem 0 0.5rem;
    color: #667eea;
}

.keypoints-content ul, .structured-content ul {
    list-style: none;
    padding-left: 0;
}

.keypoints-content li, .structured-content li {
    padding: 0.8rem;
    margin-bottom: 0.5rem;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 3px solid #667eea;
}

/* Summary Footer */
.summary-footer {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid #e0e0e0;
    display: flex;
    justify-content: space-between;
    color: #999;
    font-size: 0.9rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem;
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.empty-state h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.empty-state p {
    color: #999;
}

/* Footer */
.footer {
    text-align: center;
    padding: 2rem;
    color: white;
    background: rgba(0, 0, 0, 0.1);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .progress-steps {
        grid-template-columns: 1fr;
    }
    
    .results-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .action-buttons {
        justify-content: stretch;
    }
    
    .action-btn {
        text-align: center;
    }
}

/* Dropdown Menu */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    cursor: pointer;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 280px;
    box-shadow: 0 8px 16px rgba(0,0,0,0.2);
    border-radius: 10px;
    padding: 1rem;
    z-index: 1000;
    margin-top: 0.5rem;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-item {
    padding: 0.5rem 0;
    color: #333;
    font-size: 0.9rem;
    line-height: 1.4;
}

.dropdown-item strong {
    color: #667eea;
}

.dropdown-menu hr {
    margin: 0.5rem 0;
    border: none;
    border-top: 1px solid #e0e0e0;
}