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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #ffffff;
    min-height: 100vh;
    padding: 0;
}

/* Header */
.main-header {
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    align-items: center;
    gap: 20px;
}

.logo-icon {
    justify-self: start;
}

.logo-icon img {
    display: block;
}

.header-spacer {
    justify-self: end;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.logo-text {
    text-align: center;
    justify-self: center;
}

.logo-text h1 {
    font-size: 2rem;
    background: linear-gradient(135deg, #000000 0%, #e74c3c 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
}

.logo-text p {
    font-size: 0.9rem;
    color: #7f8c8d;
    margin: 0;
}

/* Tab Navigation */
.tab-navigation {
    background: white;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 80px;
    z-index: 99;
}

.tab-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    gap: 10px;
    overflow-x: auto;
    scrollbar-width: none;
    justify-content: center;
}

.tab-container::-webkit-scrollbar {
    display: none;
}

.tab-button {
    background: none;
    border: none;
    padding: 15px 25px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1rem;
    color: #7f8c8d;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
    white-space: nowrap;
    position: relative;
}

.tab-button:hover:not(.disabled) {
    color: #e74c3c;
    background-color: #fff5f5;
}

.tab-button.active {
    color: #e74c3c;
    border-bottom-color: #e74c3c;
    font-weight: 600;
}

.tab-button.disabled {
    cursor: not-allowed;
    opacity: 0.5;
}

.tab-icon {
    font-size: 1.3rem;
}

.tab-label {
    font-weight: 500;
}

.coming-soon {
    background: linear-gradient(135deg, #000000 0%, #e74c3c 100%);
    color: white;
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 10px;
    margin-left: 5px;
    font-weight: 600;
}

/* Tab Content */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-in;
}

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

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

.main-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 30px 20px;
    background: #f8f9fa;
}

.container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
}

.card {
    background: white;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-align: center;
}

h1 {
    color: #2c3e50;
    font-size: 2.5rem;
    margin-bottom: 15px;
    font-weight: 700;
}

.subtitle {
    color: #7f8c8d;
    font-size: 1.1rem;
    margin-bottom: 40px;
    line-height: 1.6;
}

.upload-area {
    border: 3px dashed #27ae60;
    border-radius: 15px;
    padding: 40px 20px;
    margin-bottom: 30px;
    background-color: #f8fff8;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.upload-area:hover {
    background-color: #e8f5e8;
    border-color: #229954;
}

.upload-area.dragover {
    background-color: #d5f4e6;
    border-color: #1e8449;
    transform: scale(1.02);
}

.upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
}

.upload-icon {
    font-size: 3rem;
    color: #27ae60;
}

.upload-text {
    color: #2c3e50;
    font-size: 1.2rem;
    font-weight: 500;
}

.file-count {
    color: #27ae60;
    font-size: 1.1rem;
    font-weight: 600;
    background-color: #e8f5e8;
    padding: 8px 16px;
    border-radius: 20px;
    display: inline-block;
}

.settings {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.convert-btn {
    width: 100%;
    padding: 15px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.convert-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.convert-btn:active {
    transform: translateY(0);
}

.settings-left, .settings-right {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.setting-group {
    text-align: left;
}

.setting-group label {
    display: block;
    color: #2c3e50;
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 1rem;
}

.setting-group select,
.setting-group input[type="number"],
.setting-group input[type="checkbox"] {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1rem;
    background-color: white;
    transition: border-color 0.3s ease;
}

.setting-group input[type="checkbox"] {
    width: auto;
    margin-right: 10px;
    transform: scale(1.2);
}

.checkbox-label {
    font-size: 0.9rem;
    color: #7f8c8d;
    margin-left: 5px;
}

/* Dosya İsimlendirme */
.naming-settings {
    border-top: 2px solid #e9ecef;
    padding-top: 15px;
    margin-top: 10px;
}

.custom-name-input {
    width: 100%;
    padding: 10px 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 0.95rem;
    margin-bottom: 10px;
    transition: border-color 0.3s ease;
}

.custom-name-input:focus {
    outline: none;
    border-color: #3498db;
}

.radio-group {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: 0.95rem;
    color: #2c3e50;
}

.radio-label input[type="radio"] {
    cursor: pointer;
    transform: scale(1.1);
}

.radio-label span {
    user-select: none;
}

.image-format-select {
    width: 100%;
    padding: 10px 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 0.95rem;
    margin-top: 10px;
    transition: border-color 0.3s ease;
    background-color: white;
}

.image-format-select:focus {
    outline: none;
    border-color: #e74c3c;
}

.image-format-select:disabled {
    background-color: #f5f5f5;
    cursor: not-allowed;
    opacity: 0.6;
}

/* Action Buttons */
.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin: 30px 0 20px 0;
}

.action-btn {
    padding: 15px 25px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.action-btn:active {
    transform: translateY(0);
}

.primary-btn {
    background: linear-gradient(135deg, #e74c3c 0%, #c0392b 100%);
    color: white;
}

.primary-btn:hover {
    background: linear-gradient(135deg, #c0392b 0%, #a93226 100%);
}

.secondary-btn {
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    color: white;
}

.secondary-btn:hover {
    background: linear-gradient(135deg, #2980b9 0%, #21618c 100%);
}

.confirm-btn {
    background: linear-gradient(135deg, #27ae60 0%, #229954 100%);
    color: white;
    width: 100%;
    margin-top: 15px;
}

.confirm-btn:hover {
    background: linear-gradient(135deg, #229954 0%, #1e8449 100%);
}

.btn-icon {
    font-size: 1.3rem;
}

.btn-text {
    font-size: 1rem;
}

/* Extract Settings */
.extract-settings {
    background-color: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 12px;
    padding: 20px;
    margin: 20px 0;
    animation: slideDown 0.3s ease-out;
}

.extract-settings h4 {
    color: #2c3e50;
    margin: 0 0 15px 0;
    font-size: 1.1rem;
}

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

@media (max-width: 768px) {
    .action-buttons {
        grid-template-columns: 1fr;
    }
}

/* Processing Note */
.processing-note {
    margin-top: 15px;
    font-size: 0.9rem;
    color: #e67e22;
    font-weight: 500;
    text-align: center;
}

/* SEO Tools Styles */
.seo-input-area {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 12px;
    margin-bottom: 30px;
}

.input-method-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.method-tab {
    flex: 1;
    padding: 12px 20px;
    background: white;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.method-tab:hover {
    border-color: #3498db;
    transform: translateY(-2px);
}

.method-tab.active {
    background: #3498db;
    color: white;
    border-color: #3498db;
}

.url-input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.url-input {
    flex: 1;
    min-width: 300px;
    padding: 14px 18px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.url-input:focus {
    outline: none;
    border-color: #3498db;
}

.device-selector {
    display: flex;
    gap: 5px;
    background: #f0f0f0;
    padding: 4px;
    border-radius: 8px;
}

.device-btn {
    padding: 10px 20px;
    background: transparent;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 6px;
    color: #666;
}

.device-btn:hover {
    background: rgba(52, 152, 219, 0.1);
    color: #3498db;
}

.device-btn.active {
    background: white;
    color: #3498db;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.html-input {
    width: 100%;
    min-height: 200px;
    padding: 14px 18px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 0.9rem;
    font-family: 'Courier New', monospace;
    resize: vertical;
    margin-bottom: 10px;
}

.html-input:focus {
    outline: none;
    border-color: #3498db;
}

.analyze-btn {
    padding: 14px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.analyze-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.input-note {
    font-size: 0.85rem;
    color: #666;
    margin: 0;
    font-style: italic;
}

.seo-results {
    margin-top: 30px;
}

.score-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    margin: 25px 0;
}

.score-card {
    background: white;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    text-align: center;
}

.score-label {
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 15px;
    font-weight: 500;
}

.score-circle {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: bold;
    position: relative;
    background: conic-gradient(#e0e0e0 0deg, #e0e0e0 360deg);
}

.score-circle.good {
    background: conic-gradient(#27ae60 0deg, #27ae60 var(--score-deg), #e0e0e0 var(--score-deg), #e0e0e0 360deg);
    color: #27ae60;
}

.score-circle.average {
    background: conic-gradient(#f39c12 0deg, #f39c12 var(--score-deg), #e0e0e0 var(--score-deg), #e0e0e0 360deg);
    color: #f39c12;
}

.score-circle.poor {
    background: conic-gradient(#e74c3c 0deg, #e74c3c var(--score-deg), #e0e0e0 var(--score-deg), #e0e0e0 360deg);
    color: #e74c3c;
}

.score-value {
    background: white;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.analysis-sections {
    margin-top: 30px;
}

.analysis-section {
    background: white;
    padding: 25px;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.analysis-section h4 {
    margin: 0 0 15px 0;
    font-size: 1.1rem;
    color: #2c3e50;
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 10px;
}

.analysis-content {
    color: #555;
}

.analysis-item {
    padding: 12px;
    margin-bottom: 10px;
    border-radius: 8px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.analysis-item.success {
    background: #d4edda;
    border-left: 4px solid #28a745;
}

.analysis-item.warning {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
}

.analysis-item.error {
    background: #f8d7da;
    border-left: 4px solid #dc3545;
}

.analysis-item.info {
    background: #d1ecf1;
    border-left: 4px solid #17a2b8;
}

.analysis-icon {
    font-size: 1.2rem;
    min-width: 24px;
}

.analysis-text {
    flex: 1;
}

.recommendations {
    border: 2px solid #3498db;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 10px;
}

.stat-item {
    background: #f8f9fa;
    padding: 12px;
    border-radius: 8px;
    text-align: center;
}

.stat-label {
    font-size: 0.85rem;
    color: #666;
    margin-bottom: 5px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    color: #2c3e50;
}

/* Google Search Preview */
.google-preview {
    background: white;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 20px;
    font-family: Arial, sans-serif;
}

.google-url {
    color: #202124;
    font-size: 14px;
    line-height: 1.3;
    margin-bottom: 4px;
}

.google-title {
    color: #1a0dab;
    font-size: 20px;
    line-height: 1.3;
    cursor: pointer;
    margin-bottom: 4px;
    font-weight: normal;
}

.google-title:hover {
    text-decoration: underline;
}

.google-description {
    color: #4d5156;
    font-size: 14px;
    line-height: 1.58;
}

/* Social Media Preview */
.social-preview-container {
    display: grid;
    gap: 15px;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.social-card {
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    overflow: hidden;
    background: white;
}

.social-card-header {
    padding: 10px;
    background: #f8f9fa;
    font-weight: 600;
    font-size: 0.9rem;
    border-bottom: 1px solid #e0e0e0;
}

.social-card-image {
    width: 100%;
    height: 180px;
    background: #e0e0e0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 0.9rem;
}

.social-card-content {
    padding: 12px;
}

.social-card-title {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 6px;
    color: #1c1e21;
}

.social-card-description {
    font-size: 0.85rem;
    color: #606770;
    line-height: 1.4;
}

.social-card-url {
    font-size: 0.75rem;
    color: #999;
    margin-top: 6px;
    text-transform: uppercase;
}

/* Keyword Cloud */
.keyword-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
}

.keyword-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.keyword-count {
    background: rgba(255,255,255,0.3);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.8rem;
}

.keyword-density {
    font-size: 0.8rem;
    opacity: 0.9;
}

/* Readability Score Circle */
.readability-score {
    display: flex;
    align-items: center;
    gap: 20px;
    margin: 15px 0;
}

.readability-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: bold;
    background: conic-gradient(#27ae60 0deg, #27ae60 var(--read-deg), #e0e0e0 var(--read-deg), #e0e0e0 360deg);
}

.readability-circle.good {
    background: conic-gradient(#27ae60 0deg, #27ae60 var(--read-deg), #e0e0e0 var(--read-deg), #e0e0e0 360deg);
    color: #27ae60;
}

.readability-circle.average {
    background: conic-gradient(#f39c12 0deg, #f39c12 var(--read-deg), #e0e0e0 var(--read-deg), #e0e0e0 360deg);
    color: #f39c12;
}

.readability-circle.poor {
    background: conic-gradient(#e74c3c 0deg, #e74c3c var(--read-deg), #e0e0e0 var(--read-deg), #e0e0e0 360deg);
    color: #e74c3c;
}

.readability-circle-inner {
    background: white;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.readability-details {
    flex: 1;
}

/* Schema Display */
.schema-item {
    background: #f8f9fa;
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 10px;
    border-left: 4px solid #3498db;
}

.schema-type {
    font-weight: 600;
    color: #3498db;
    margin-bottom: 6px;
}

.schema-code {
    background: #2c3e50;
    color: #2ecc71;
    padding: 12px;
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* Meta Generator */
.meta-generator-input {
    margin-bottom: 15px;
}

.meta-generator-input label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: white;
}

.meta-generator-input input,
.meta-generator-input textarea {
    width: 100%;
    padding: 10px;
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 6px;
    background: rgba(255,255,255,0.1);
    color: white;
    font-size: 0.95rem;
}

.meta-generator-input input::placeholder,
.meta-generator-input textarea::placeholder {
    color: rgba(255,255,255,0.6);
}

.meta-generator-input input:focus,
.meta-generator-input textarea:focus {
    outline: none;
    border-color: white;
    background: rgba(255,255,255,0.15);
}

.meta-output {
    background: rgba(0,0,0,0.2);
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
}

.meta-output pre {
    margin: 0;
    white-space: pre-wrap;
    word-wrap: break-word;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    color: #2ecc71;
}

.copy-btn {
    background: white;
    color: #667eea;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    margin-top: 10px;
    transition: all 0.3s ease;
}

.copy-btn:hover {
    background: #f0f0f0;
    transform: translateY(-2px);
}

/* Export Buttons */
.export-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    margin: 10px;
    transition: all 0.3s ease;
}

.export-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
}

.export-btn span:first-child {
    font-size: 1.5rem;
}

/* Broken Links Table */
.broken-links-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
    font-size: 0.9rem;
}

.broken-links-table th {
    background: #f8f9fa;
    padding: 10px;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid #e0e0e0;
}

.broken-links-table td {
    padding: 10px;
    border-bottom: 1px solid #f0f0f0;
}

.broken-links-table tr:hover {
    background: #f8f9fa;
}

.status-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

.status-badge.error {
    background: #ffe0e0;
    color: #c0392b;
}

.status-badge.success {
    background: #d4edda;
    color: #27ae60;
}

.status-badge.warning {
    background: #fff3cd;
    color: #f39c12;
}

.setting-group select:focus,
.setting-group input[type="number"]:focus {
    outline: none;
    border-color: #3498db;
}

.quality-slider {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: #e0e0e0;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.quality-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #3498db;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(52, 152, 219, 0.3);
}

.quality-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #3498db;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 6px rgba(52, 152, 219, 0.3);
}

.processing {
    margin: 30px 0;
    color: #2c3e50;
    font-size: 1.1rem;
    font-weight: 500;
}

.progress-container {
    width: 100%;
    height: 8px;
    background-color: #e0e0e0;
    border-radius: 4px;
    margin: 15px 0;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, #27ae60, #2ecc71);
    border-radius: 4px;
    transition: width 0.3s ease;
    position: relative;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-text {
    margin-bottom: 10px;
    font-weight: 600;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.download-area {
    margin-top: 30px;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 15px;
    border: 2px solid #e9ecef;
}

.download-area h3 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.download-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.download-link {
    display: inline-block;
    background-color: #27ae60;
    color: white;
    padding: 12px 20px;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: background-color 0.3s ease;
    text-align: center;
}

.download-link:hover {
    background-color: #229954;
}

.download-all {
    background-color: #3498db;
    margin-top: 15px;
    padding: 15px 25px;
    font-size: 1.1rem;
}

.download-all:hover {
    background-color: #2980b9;
}

/* Dosya boyutu bilgileri */
.file-size-info {
    background-color: #f8f9fa;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
}

.size-comparison {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.size-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background-color: white;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
}

.size-item.saved {
    background-color: #d4edda;
    border-color: #c3e6cb;
    color: #155724;
}

.size-label {
    font-weight: 600;
    color: #2c3e50;
}

.size-value {
    font-weight: 700;
    color: #27ae60;
}

.size-item.saved .size-value {
    color: #155724;
}

/* Bildirimler */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    max-width: 400px;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    animation: slideIn 0.3s ease-out;
}

.notification-success {
    background: linear-gradient(135deg, #27ae60, #2ecc71);
    color: white;
}

.notification-error {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    color: white;
}

.notification-content {
    display: flex;
    align-items: center;
    padding: 15px 20px;
    gap: 12px;
}

.notification-icon {
    font-size: 1.2rem;
}

.notification-message {
    flex: 1;
    font-weight: 500;
}

.notification-close {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color 0.2s;
}

.notification-close:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .tab-navigation {
        top: 70px;
    }
    
    .tab-button {
        padding: 12px 20px;
        font-size: 0.9rem;
    }
    
    .tab-icon {
        font-size: 1.1rem;
    }
    
    .logo-text h1 {
        font-size: 1.5rem;
    }
    
    .main-header {
        padding: 15px 0;
    }
    
    .header-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .logo-icon {
        justify-self: center;
    }
    
    .header-spacer {
        display: none;
    }
}

@media (max-width: 768px) {
    .card {
        padding: 30px 20px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    .settings {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .upload-area {
        padding: 30px 15px;
    }
    
    .upload-icon {
        font-size: 2.5rem;
    }
    
    .upload-text {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }
    
    .card {
        padding: 20px 15px;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
}