/* CSS Variables for consistent theming */
:root {
    --primary-color: #3498db;
    --primary-dark: #2980b9;
    --secondary-color: #2ecc71;
    --secondary-dark: #27ae60;
    --danger-color: #e74c3c;
    --danger-dark: #c0392b;
    --warning-color: #f1c40f;
    --warning-dark: #f39c12;
    --purple-color: #9b59b6;
    --purple-dark: #8e44ad;
    --dark-color: #2c3e50;
    --darker-color: #34495e;
    --light-gray: #ecf0f1;
    --medium-gray: #bdc3c7;
    --dark-gray: #7f8c8d;
    --text-color: #333;
    --text-light: #666;
    --text-lighter: #999;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-lighter: #f5f5f5;
    --border-color: #ddd;
    --border-light: #e2e8f0;
    --shadow-sm: 0 2px 5px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 25px rgba(0, 0, 0, 0.15);
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    --transition: all 0.3s ease;
    --transition-fast: all 0.2s ease;
}

/* Reset and base styles */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-white);
}

/* Navigation and header styling */
.menu-column {
    display: flex;
    justify-content: flex-end;
}

.main-nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-nav li {
    margin-left: 30px;
}

.main-nav a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 700;
    padding: 8px 0;
    position: relative;
    transition: var(--transition);
}

.main-nav a:hover {
    color: var(--primary-color);
}

.main-nav a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.main-nav a:hover::after {
    width: 100%;
}

/* Upload area styling */
.upload-area {
    border: 2px dashed var(--primary-color);
    background-color: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: 50px 30px;
    text-align: center;
    cursor: pointer;
    margin-bottom: 30px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.upload-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(52, 152, 219, 0.1), transparent);
    transition: left 0.5s;
}

.upload-area:hover::before {
    left: 100%;
}

.upload-area:hover {
    border-color: var(--primary-dark);
    background-color: var(--bg-white);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.upload-area.active {
    border-color: var(--secondary-color);
    background-color: #e8f5e8;
    transform: scale(1.02);
}

.upload-icon {
    font-size: 60px;
    color: var(--primary-color);
    margin-bottom: 20px;
    display: block;
    transition: var(--transition);
}

.upload-area:hover .upload-icon {
    transform: scale(1.1);
    color: var(--primary-dark);
}

.message-text h3 {
    margin: 0 0 10px 0;
    color: var(--dark-color);
    font-size: 20px;
    font-weight: 600;
}

.message-text p {
    margin: 0;
    color: var(--text-light);
    font-size: 14px;
}

/* File information styling */
.file-info {
    margin: 25px 0;
    padding: 20px 25px;
    background: linear-gradient(135deg, #e3f2fd, #f3e5f5);
    border-radius: var(--radius-lg);
    display: none;
    box-shadow: var(--shadow-sm);
    animation: slideInUp 0.3s ease;
}

.file-info p {
    margin: 0;
    font-weight: 500;
    color: var(--dark-color);
}

/* Button styling */
.button-group {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin: 30px 0 20px 0;
    flex-wrap: wrap;
}

/* Base button styles */
button, .button {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border: none;
    padding: 16px 32px;
    border-radius: 50px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition);
    text-decoration: none;
    text-align: center;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
    position: relative;
    overflow: hidden;
    min-width: 160px;
}

button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

button:hover::before {
    left: 100%;
}

button:hover, .button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(52, 152, 219, 0.4);
    background: linear-gradient(135deg, var(--primary-dark), #1f5f99);
}

button:active {
    transform: translateY(-1px);
}

#resetBtn {
    background: linear-gradient(135deg, var(--danger-color), var(--danger-dark));
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
}

#resetBtn:hover {
    background: linear-gradient(135deg, var(--danger-dark), #a93226);
    box-shadow: 0 8px 25px rgba(231, 76, 60, 0.4);
}

button:disabled {
    background: var(--medium-gray) !important;
    cursor: not-allowed !important;
    transform: none !important;
    box-shadow: none !important;
    opacity: 0.6;
}

button:disabled::before {
    display: none !important;
}

/* Remove button specific styles - CRITICAL FIXES */
.remove-btn {
    background: var(--danger-color) !important;
    color: white !important;
    border: none !important;
    width: 24px !important;
    height: 24px !important;
    min-width: 24px !important;
    min-height: 24px !important;
    max-width: 24px !important;
    max-height: 24px !important;
    border-radius: 50% !important;
    cursor: pointer !important;
    font-size: 16px !important;
    font-weight: bold !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    align-self: flex-end !important;
    transition: var(--transition) !important;
    padding: 0 !important;
    margin: 0 !important;
    line-height: 1 !important;
    box-shadow: var(--shadow-sm) !important;
    position: relative !important;
    z-index: 10 !important;
    flex-shrink: 0 !important;
    overflow: visible !important;
}

.remove-btn:hover {
    background: var(--danger-dark) !important;
    transform: scale(1.1) !important;
    box-shadow: var(--shadow-md) !important;
}

.remove-btn::before {
    display: none !important;
}

/* Options and form controls */
.options {
    margin: 30px 0;
    padding: 25px;
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
}

.options label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark-color);
    font-size: 14px;
}

.checkbox-option {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 15px;
}

.checkbox-option input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
    cursor: pointer;
}

.checkbox-option label {
    margin-bottom: 0;
    cursor: pointer;
    font-weight: 500;
}

select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-white);
    margin-bottom: 15px;
    font-size: 14px;
    color: var(--text-color);
    transition: var(--transition);
    cursor: pointer;
}

select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

select:hover {
    border-color: var(--primary-color);
}

select:disabled {
    cursor: not-allowed;
    background-color: var(--bg-lighter);
    color: var(--text-lighter);
}

input[type="text"] {
    transition: var(--transition);
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

input[type="text"]:hover {
    border-color: var(--primary-color);
}

/* Progress bar styling */
.progress-container {
    display: none;
    margin: 30px 0;
    animation: fadeIn 0.3s ease;
}

.progress-bar {
    height: 8px;
    background-color: var(--light-gray);
    border-radius: 50px;
    margin-bottom: 15px;
    overflow: hidden;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    width: 0%;
    transition: width 0.4s ease;
    border-radius: 50px;
    position: relative;
    overflow: hidden;
}

.progress::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: shimmer 1.5s infinite;
}

#progressText {
    font-size: 14px;
    color: var(--dark-gray);
    text-align: center;
    font-weight: 500;
}

/* Error and success messages */
.error {
    color: var(--danger-dark);
    background: linear-gradient(135deg, #fadbd8, #f5b7b1);
    padding: 16px 20px;
    border-radius: var(--radius-md);
    margin: 20px 0;
    display: none;
    box-shadow: var(--shadow-sm);
    font-weight: 500;
    animation: shake 0.5s ease;
}

.success {
    background: linear-gradient(135deg, #e7f7ed, #d5f4e6);
    border: 2px solid var(--secondary-color);
    border-radius: var(--radius-lg);
    padding: 25px;
    margin: 30px 0;
    display: none;
    box-shadow: var(--shadow-lg);
    text-align: center;
    transition: var(--transition);
    animation: slideInUp 0.5s ease;
}

.success-content {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.success-header {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    width: 100%;
    flex-wrap: wrap;
    gap: 15px;
}

.success-icon {
    font-size: 32px;
    color: var(--secondary-color);
    margin-right: 12px;
    animation: bounce 1s ease;
}

.success-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--secondary-dark);
    flex: 1;
    min-width: 200px;
}

/* Image Preview Styles - ENHANCED FOR DRAG AND DROP */
.preview-container {
    margin: 30px 0;
    padding: 25px;
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
}

.preview {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 20px;
    margin-top: 20px;
    min-height: 100px;
}

.preview-item {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    cursor: grab;
    background-color: var(--bg-white);
    user-select: none;
}

.preview-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.preview-item:active {
    cursor: grabbing;
}

.preview-item img {
    width: 100%;
    height: 120px;
    object-fit: cover;
    display: block;
    pointer-events: none;
}

.preview-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 8px;
    opacity: 0;
    transition: var(--transition);
    pointer-events: none;
}

.preview-item:hover .preview-overlay {
    opacity: 1;
    pointer-events: auto;
}

.file-name {
    color: white;
    font-size: 12px;
    font-weight: 500;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
    background: rgba(0, 0, 0, 0.5);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    pointer-events: none;
}

/* Sortable states */
.sortable-ghost {
    opacity: 0.4;
    transform: rotate(5deg);
}

.sortable-chosen {
    cursor: grabbing;
}

.sortable-drag {
    transform: rotate(10deg);
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

/* Download Results Styles */
.download-container {
    margin-top: 25px;
}

.download-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    margin-bottom: 15px;
    background: var(--bg-white);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.download-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.download-info-item {
    display: flex;
    align-items: center;
    gap: 15px;
    flex: 1;
}

.download-icon {
    font-size: 32px;
    color: var(--primary-color);
}

.download-details h4 {
    margin: 0 0 5px 0;
    color: var(--dark-color);
    font-size: 16px;
    font-weight: 600;
}

.download-details p {
    margin: 0;
    color: var(--text-light);
    font-size: 14px;
}

/* Enhanced Download Button Styles */
.download-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark)) !important;
    color: white !important;
    border: none !important;
    padding: 12px 24px !important;
    border-radius: 50px !important;
    cursor: pointer !important;
    font-size: 14px !important;
    font-weight: 600 !important;
    display: flex !important;
    align-items: center !important;
    gap: 8px !important;
    transition: var(--transition) !important;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3) !important;
    min-width: 140px !important;
    justify-content: center !important;
    position: relative !important;
    overflow: hidden !important;
}

.download-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.download-btn:hover::before {
    left: 100%;
}

.download-btn:hover:not(:disabled) {
    transform: translateY(-2px) !important;
    box-shadow: 0 6px 20px rgba(52, 152, 219, 0.4) !important;
    background: linear-gradient(135deg, var(--primary-dark), #1f5f99) !important;
}

.download-btn:disabled {
    opacity: 0.7 !important;
    cursor: not-allowed !important;
    transform: none !important;
}

.download-btn.downloaded {
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark)) !important;
    transform: none !important;
    box-shadow: 0 4px 15px rgba(46, 204, 113, 0.3) !important;
}

.download-btn-icon {
    font-size: 16px;
}

/* Download All Button Styles */
.download-all-container {
    margin-top: 25px;
    padding: 20px;
    text-align: center;
    background: linear-gradient(135deg, var(--bg-light), #f1f3f4);
    border-radius: var(--radius-lg);
    border: 2px dashed var(--primary-color);
}

.download-all-btn {
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark)) !important;
    color: white !important;
    border: none !important;
    padding: 16px 32px !important;
    border-radius: 50px !important;
    cursor: pointer !important;
    font-size: 16px !important;
    font-weight: 600 !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 10px !important;
    transition: var(--transition) !important;
    box-shadow: 0 4px 15px rgba(46, 204, 113, 0.3) !important;
    min-width: 180px !important;
    justify-content: center !important;
    position: relative !important;
    overflow: hidden !important;
}

.download-all-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.download-all-btn:hover::before {
    left: 100%;
}

.download-all-btn:hover:not(:disabled) {
    transform: translateY(-2px) !important;
    box-shadow: 0 6px 20px rgba(46, 204, 113, 0.4) !important;
    background: linear-gradient(135deg, var(--secondary-dark), #1e8449) !important;
}

.download-all-btn:disabled {
    opacity: 0.7 !important;
    cursor: not-allowed !important;
    transform: none !important;
}

.download-all-btn.downloading {
    background: linear-gradient(135deg, var(--warning-color), var(--warning-dark)) !important;
    cursor: not-allowed !important;
    transform: none !important;
    box-shadow: 0 4px 15px rgba(241, 196, 15, 0.3) !important;
}

.download-all-btn.downloaded {
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark)) !important;
    transform: none !important;
    box-shadow: 0 4px 15px rgba(46, 204, 113, 0.3) !important;
}

.download-info {
    text-align: center;
    margin: 20px 0;
    padding: 20px;
    background: linear-gradient(135deg, #e8f5e8, #d4edda);
    border-radius: var(--radius-lg);
    border: 1px solid var(--secondary-color);
}

.download-info h3 {
    margin: 0 0 10px 0;
    color: var(--secondary-dark);
    font-size: 20px;
    font-weight: 600;
}

.download-info p {
    margin: 0;
    color: var(--text-light);
    font-size: 15px;
    font-weight: 500;
}

/* Content containers */
.full-width-wrapper {
    display: flex;
    flex-direction: column;
    gap: 30px;
    width: 100%;
    margin-top: 40px;
}

.info-container-full {
    width: 100%;
    padding: 35px 35px 45px;
    border: none;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    background-color: var(--bg-white);
    position: relative;
    transition: var(--transition);
}

.info-container-full:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.info-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
}

.info-icon {
    font-size: 28px;
}

.info-header h2 {
    font-size: 26px;
    font-weight: 700;
    color: var(--dark-color);
    margin: 0;
}

.content-row-2 {
    padding: 40px 0;
    background: linear-gradient(135deg, var(--bg-lighter), #f8f9fa);
    width: 100%;
}

/* Accent bars */
.accent-bar {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    border-bottom-left-radius: var(--radius-xl);
    border-bottom-right-radius: var(--radius-xl);
    height: 6px;
}

.accent-bar.tricolor-bgr {
    background: linear-gradient(to right, 
        var(--primary-color) 0%, var(--primary-color) 33.33%, 
        var(--secondary-color) 33.33%, var(--secondary-color) 66.66%, 
        var(--danger-color) 66.66%, var(--danger-color) 100%);
}

.accent-bar.blue {
    background-color: var(--primary-color);
}

.accent-bar.green {
    background-color: var(--secondary-color);
}

.accent-bar.yellow {
    background-color: var(--warning-color);
}

/* List styling */
.info-container-full ol,
.info-container-full ul {
    padding-left: 0;
    list-style-position: inside;
    margin: 20px 0;
}

.info-container-full ol {
    counter-reset: item;
    list-style-type: none;
}

.info-container-full ol li {
    position: relative;
    padding-left: 50px;
    margin-bottom: 20px;
    counter-increment: item;
    font-size: 16px;
    line-height: 1.6;
}

.info-container-full ol li:before {
    content: counter(item);
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 16px;
    box-shadow: var(--shadow-md);
}

.info-container-full ul {
    list-style-type: none;
}

.info-container-full ul li {
    position: relative;
    padding-left: 32px;
    margin-bottom: 15px;
    font-size: 16px;
    line-height: 1.6;
}

.info-container-full ul li:before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    width: 14px;
    height: 14px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
}

.info-container-full ul li:nth-child(1):before {
    background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
}

.info-container-full ul li:nth-child(2):before {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

.info-container-full ul li:nth-child(3):before {
    background: linear-gradient(135deg, var(--warning-color), var(--warning-dark));
}

.info-container-full ul li:nth-child(4):before {
    background: linear-gradient(135deg, var(--danger-color), var(--danger-dark));
}

.info-container-full ul li:nth-child(5):before {
    background: linear-gradient(135deg, var(--purple-color), var(--purple-dark));
}

/* FAQ section styling */
.faq-section {
    margin-top: 25px;
}

.faq-item {
    margin-bottom: 15px;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    background-color: var(--bg-white);
}

.faq-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.faq-question {
    padding: 22px 25px;
    background: linear-gradient(135deg, var(--bg-light), #f1f3f4);
    cursor: pointer;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
    color: var(--dark-color);
    font-size: 16px;
}

.faq-question:hover {
    background: linear-gradient(135deg, #e9ecef, #dee2e6);
}

.faq-item.active .faq-question {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.faq-answer {
    padding: 0 25px;
    max-height: 0;
    overflow: hidden;
    background: var(--bg-white);
    transition: all 0.4s ease;
    color: var(--text-light);
    line-height: 1.7;
    font-size: 15px;
}

.faq-item.active .faq-answer {
    padding: 25px;
    max-height: 500px;
}

.faq-toggle {
   font-size: 24px;
   font-weight: bold;
   transition: var(--transition);
   color: var(--primary-color);
   width: 30px;
   height: 30px;
   display: flex;
   align-items: center;
   justify-content: center;
   border-radius: 50%;
   background-color: rgba(52, 152, 219, 0.1);
}

.faq-item.active .faq-toggle {
   transform: rotate(45deg);
   color: white;
   background-color: rgba(255, 255, 255, 0.2);
}

/* Recommendations section */
.conversion-recommendations {
   background: linear-gradient(135deg, var(--bg-white), var(--bg-light));
   border-radius: var(--radius-lg);
   padding: 25px;
   margin: 35px 0;
   box-shadow: var(--shadow-sm);
   border: 1px solid var(--border-light);
   transition: var(--transition);
}

.conversion-recommendations:hover {
   transform: translateY(-2px);
   box-shadow: var(--shadow-md);
}

.recommendations-content {
   display: flex;
   align-items: center;
   justify-content: center;
   gap: 15px;
   flex-wrap: wrap;
}

.recommendations-icon {
   font-size: 22px;
}

.recommendations-text {
   font-size: 16px;
   color: var(--text-light);
   font-weight: 500;
}

.tool-link {
   padding: 8px 16px;
   border-radius: 50px;
   text-decoration: none;
   font-weight: 600;
   font-size: 14px;
   transition: var(--transition);
   box-shadow: var(--shadow-sm);
}

.tool-link.compress {
   background: linear-gradient(135deg, #81DCA1, #6bc788);
   color: #2d5a3d;
}

.tool-link.compress:hover {
   background: linear-gradient(135deg, #6bc788, #5cb876);
   transform: translateY(-2px);
   box-shadow: var(--shadow-md);
}

.tool-link.webp {
   background: linear-gradient(135deg, #ff9800, #e68900);
   color: #5d3600;
}

.tool-link.webp:hover {
   background: linear-gradient(135deg, #e68900, #cc7a00);
   transform: translateY(-2px);
   box-shadow: var(--shadow-md);
}

.tool-link.avif {
   background: linear-gradient(135deg, #B8DFFF, #9fd1ff);
   color: #1a4480;
}

.tool-link.avif:hover {
   background: linear-gradient(135deg, #9fd1ff, #87c3ff);
   transform: translateY(-2px);
   box-shadow: var(--shadow-md);
}

/* Stats container styling */
.stats-container {
   padding-bottom: 38px;
}

.stats-wrapper {
   display: flex;
   justify-content: space-around;
   gap: 30px;
   margin-top: 20px;
}

.stat-card {
   display: flex;
   flex-direction: column;
   align-items: center;
   padding: 25px;
   background: linear-gradient(145deg, #f8f9fa, #ffffff);
   border-radius: 15px;
   box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
   flex: 1;
   position: relative;
   overflow: hidden;
   transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover {
   transform: translateY(-5px);
   box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.total-stats {
   border-left: 5px solid #3498db;
}

.hourly-stats {
   border-left: 5px solid #2ecc71;
}

.stat-number {
   font-size: 42px;
   font-weight: 700;
   color: #2c3e50;
   margin-bottom: 10px;
   background: linear-gradient(90deg, #3498db, #2ecc71);
   -webkit-background-clip: text;
   -webkit-text-fill-color: transparent;
   background-clip: text;
}

.stat-label {
   font-size: 14px;
   font-weight: 600;
   color: #7f8c8d;
   text-transform: uppercase;
   letter-spacing: 1px;
   text-align: center;
}

.stat-icon {
   position: absolute;
   top: 15px;
   right: 15px;
   font-size: 24px;
   opacity: 0.2;
}

/* Animations */
@keyframes slideInUp {
   from {
       opacity: 0;
       transform: translateY(20px);
   }
   to {
       opacity: 1;
       transform: translateY(0);
   }
}

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

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

@keyframes shake {
   0%, 100% { transform: translateX(0); }
   25% { transform: translateX(-5px); }
   75% { transform: translateX(5px); }
}

@keyframes bounce {
   0%, 100% { transform: scale(1); }
   50% { transform: scale(1.2); }
}

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

@keyframes pulse {
   0%, 100% { transform: scale(1); }
   50% { transform: scale(1.02); }
}

/* Loading states */
.loading {
   pointer-events: none;
   opacity: 0.7;
}

.loading::after {
   content: '';
   position: absolute;
   top: 50%;
   left: 50%;
   width: 20px;
   height: 20px;
   margin: -10px 0 0 -10px;
   border: 2px solid transparent;
   border-top: 2px solid var(--primary-color);
   border-radius: 50%;
   animation: spin 1s linear infinite;
}

/* Enhanced loading animation for buttons */
.download-btn.loading,
.download-all-btn.loading {
   position: relative;
   color: transparent;
}

.download-btn.loading::after,
.download-all-btn.loading::after {
   content: '';
   position: absolute;
   top: 50%;
   left: 50%;
   width: 16px;
   height: 16px;
   margin: -8px 0 0 -8px;
   border: 2px solid transparent;
   border-top: 2px solid currentColor;
   border-radius: 50%;
   animation: spin 1s linear infinite;
}

/* Responsive design */
@media (max-width: 1024px) {
   .info-container-full {
       padding: 25px 25px 35px;
   }
   
   .stats-wrapper {
       gap: 20px;
   }
}

@media (max-width: 768px) {
   :root {
       --transition: all 0.2s ease;
   }
   
   .upload-area {
       padding: 30px 20px;
   }
   
   .upload-icon {
       font-size: 48px;
   }
   
   .message-text h3 {
       font-size: 18px;
   }
   
   .button-group {
       flex-direction: column;
       gap: 15px;
   }
   
   button, .button {
       width: 100%;
       min-width: auto;
   }
   
   .info-container-full {
       padding: 20px 20px 30px;
   }
   
   .info-header h2 {
       font-size: 22px;
   }
   
   .info-container-full ol li {
       padding-left: 45px;
       font-size: 15px;
   }
   
   .info-container-full ol li:before {
       width: 30px;
       height: 30px;
       font-size: 14px;
   }
   
   .info-container-full ul li {
       padding-left: 28px;
       font-size: 15px;
   }
   
   .info-container-full ul li:before {
       width: 12px;
       height: 12px;
   }
   
   .faq-question {
       padding: 18px 20px;
       font-size: 15px;
   }
   
   .faq-answer {
       font-size: 14px;
   }
   
   .faq-item.active .faq-answer {
       padding: 20px;
   }
   
   .faq-toggle {
       font-size: 20px;
       width: 28px;
       height: 28px;
   }
   
   .success-header {
       flex-direction: column;
       gap: 10px;
   }
   
   .success-title {
       font-size: 18px;
       text-align: center;
       min-width: auto;
   }
   
   .recommendations-content {
       flex-direction: column;
       gap: 12px;
       text-align: center;
   }
   
   .tool-link {
       padding: 10px 20px;
       width: 100%;
       text-align: center;
       max-width: 250px;
   }
   
   /* Download section mobile */
   .download-item {
       flex-direction: column;
       gap: 15px;
       text-align: center;
   }
   
   .download-info-item {
       justify-content: center;
       text-align: center;
   }
   
   .download-btn {
       width: 100% !important;
       min-width: auto !important;
   }
   
   .download-all-btn {
       width: 100% !important;
       min-width: auto !important;
   }
   
   /* Preview section mobile */
   .preview {
       grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
       gap: 15px;
   }
   
   .preview-item img {
       height: 100px;
   }
   
   .preview-overlay {
       padding: 6px;
   }
   
   .file-name {
       font-size: 11px;
       padding: 3px 6px;
   }
   
   /* Stats responsive */
   .stats-wrapper {
       flex-direction: column;
       gap: 20px;
   }
   
   .stat-card {
       padding: 20px;
   }
   
   .stat-number {
       font-size: 36px;
   }
}

@media (max-width: 480px) {
   .upload-area {
       padding: 25px 15px;
   }
   
   .upload-icon {
       font-size: 40px;
   }
   
   .message-text h3 {
       font-size: 16px;
   }
   
   .message-text p {
       font-size: 13px;
   }
   
   .file-info {
       padding: 15px 20px;
   }
   
   .info-container-full {
       padding: 15px 15px 25px;
   }
   
   .info-header h2 {
       font-size: 20px;
   }
   
   .faq-question {
       padding: 15px 18px;
       font-size: 14px;
   }
   
   .faq-item.active .faq-answer {
       padding: 18px;
   }
   
   /* Download section small mobile */
   .download-details h4 {
       font-size: 14px;
   }
   
   .download-details p {
       font-size: 12px;
   }
   
   .download-btn {
       padding: 10px 20px !important;
       font-size: 13px !important;
   }
   
   .download-all-btn {
       padding: 14px 28px !important;
       font-size: 14px !important;
   }
   
   /* Preview section small mobile */
   .preview {
       grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
       gap: 10px;
   }
   
   .preview-item img {
       height: 80px;
   }
}

/* Accessibility improvements */
.faq-question:focus-visible,
button:focus-visible,
.tool-link:focus-visible,
.download-btn:focus-visible,
.download-all-btn:focus-visible {
   outline: 3px solid var(--primary-color);
   outline-offset: 2px;
}

.upload-area:focus-within {
   outline: 3px solid var(--primary-color);
   outline-offset: 2px;
}

/* Enhanced focus styles for better accessibility */
button:focus,
select:focus,
input:focus,
.download-btn:focus,
.download-all-btn:focus {
   outline: 2px solid var(--primary-color);
   outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
   *,
   *::before,
   *::after {
       animation-duration: 0.01ms !important;
       animation-iteration-count: 1 !important;
       transition-duration: 0.01ms !important;
       scroll-behavior: auto !important;
   }
   
   .progress::after,
   .upload-area::before,
   button::before,
   .download-btn::before,
   .download-all-btn::before {
       display: none;
   }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
   button,
   .download-btn,
   .download-all-btn {
       border: 2px solid #000;
   }
   
   .faq-item {
       border: 2px solid #000;
   }
   
   .remove-btn {
       border: 2px solid #fff !important;
   }
}

/* Custom selection styling */
::selection {
   background-color: rgba(52, 152, 219, 0.3);
   color: var(--text-color);
}

::-moz-selection {
   background-color: rgba(52, 152, 219, 0.3);
   color: var(--text-color);
}

/* Scrollbar styling */
::-webkit-scrollbar {
   width: 8px;
   height: 8px;
}

::-webkit-scrollbar-track {
   background: var(--bg-light);
   border-radius: 4px;
}

::-webkit-scrollbar-thumb {
   background: var(--medium-gray);
   border-radius: 4px;
   transition: var(--transition);
}

::-webkit-scrollbar-thumb:hover {
   background: var(--dark-gray);
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
   :root {
       --text-color: #e4e4e7;
       --text-light: #a1a1aa;
       --text-lighter: #71717a;
       --bg-white: #18181b;
       --bg-light: #27272a;
       --bg-lighter: #3f3f46;
       --border-color: #52525b;
       --border-light: #3f3f46;
       --dark-color: #f4f4f5;
       --darker-color: #d4d4d8;
   }
   
   .upload-area {
       background-color: var(--bg-light);
       border-color: var(--primary-color);
   }
   
   .preview-item {
       background-color: var(--bg-light);
   }
   
   .info-container-full {
       background-color: var(--bg-white);
   }
   
   .faq-item {
       background-color: var(--bg-white);
   }
   
   .download-item {
       background-color: var(--bg-light);
       border-color: var(--border-color);
   }
}

/* Print styles */
@media print {
   .upload-area,
   .button-group,
   .download-results,
   .progress-container,
   .preview-container {
       display: none !important;
   }
   
   .info-container-full {
       box-shadow: none;
       border: 1px solid #000;
       page-break-inside: avoid;
       margin-bottom: 20px;
   }
   
   body {
       background: white;
       color: black;
   }
}

/* Container max-width for very large screens */
@media (min-width: 1400px) {
   .container {
       max-width: 1200px;
       margin: 0 auto;
   }
}

/* Smooth scrolling for the entire document */
html {
   scroll-behavior: smooth;
}

/* Ensure text readability */
.info-container-full p,
.info-container-full li {
   line-height: 1.7;
   margin-bottom: 1em;
}

/* Last element margin cleanup */
.info-container-full p:last-child,
.info-container-full li:last-child,
.info-container-full ol:last-child,
.info-container-full ul:last-child {
   margin-bottom: 0;
}

/* Skip link for accessibility */
.skip-link {
   position: absolute;
   left: -9999px;
   z-index: 999;
   padding: 8px 16px;
   background: var(--primary-color);
   color: white;
   text-decoration: none;
   border-radius: var(--radius-sm);
}

.skip-link:focus {
   left: 16px;
   top: 16px;
}

/* Enhanced success animation */
.success.show {
   animation: slideInUp 0.5s ease, pulse 2s ease-in-out;
}

/* Error shake animation enhancement */
.error.shake {
   animation: shake 0.5s ease;
}

/* Enhanced button active states */
.download-btn:active:not(:disabled),
.download-all-btn:active:not(:disabled) {
   transform: translateY(0);
   box-shadow: 0 2px 8px rgba(52, 152, 219, 0.3);
}

/* Drag and drop visual feedback */
.preview.drag-over {
   background-color: rgba(52, 152, 219, 0.1);
   border: 2px dashed var(--primary-color);
   border-radius: var(--radius-lg);
}

/* Empty state styling */
.preview:empty::after {
   content: 'Drag images here to reorder them';
   display: block;
   text-align: center;
   padding: 40px;
   color: var(--text-lighter);
   font-style: italic;
}

/* Ensure remove buttons don't inherit global button styles */
.remove-btn * {
   pointer-events: none;
}

/* Prevent text selection on draggable items */
.preview-item {
   -webkit-user-select: none;
   -moz-user-select: none;
   -ms-user-select: none;
   user-select: none;
}

/* Focus management for sortable items */
.preview-item:focus {
   outline: 2px solid var(--primary-color);
   outline-offset: 2px;
}