/* JPEG Signature Resize Tool - Professional Styling */

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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --error-color: #ef4444;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --jpeg-primary: #dc2626;
    --jpeg-secondary: #fca5a5;
    --jpeg-accent: #fee2e2;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: linear-gradient(135deg, var(--jpeg-accent) 0%, var(--bg-color) 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* Header Styles */
.header {
    background: linear-gradient(135deg, var(--jpeg-primary) 0%, var(--primary-color) 100%);
    padding: 1rem 0;
    box-shadow: 0 4px 20px rgba(220, 38, 38, 0.15);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.logo i {
    font-size: 2rem;
    color: var(--jpeg-secondary);
}

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

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    backdrop-filter: blur(10px);
}

/* Main Container */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Hero Section */
.hero-section {
    text-align: center;
    margin-bottom: 3rem;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--jpeg-primary), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.hero-title i {
    background: linear-gradient(135deg, var(--jpeg-primary), var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Tool Section */
.tool-section {
    margin-bottom: 3rem;
}

.tool-container {
    background: var(--card-bg);
    border-radius: 1rem;
    box-shadow: 0 10px 30px rgba(220, 38, 38, 0.1);
    padding: 2rem;
    border: 1px solid var(--jpeg-secondary);
}

.tool-header {
    text-align: center;
    margin-bottom: 2rem;
}

.tool-header h2 {
    color: var(--jpeg-primary);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.tool-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Upload Section */
.upload-section {
    margin-bottom: 2rem;
}

.upload-area {
    border: 3px dashed var(--jpeg-secondary);
    border-radius: 1rem;
    padding: 3rem 2rem;
    text-align: center;
    background: var(--jpeg-accent);
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--jpeg-primary);
    background: rgba(220, 38, 38, 0.05);
    transform: translateY(-2px);
}

.upload-content h3 {
    color: var(--jpeg-primary);
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.upload-icon {
    font-size: 3rem;
    color: var(--jpeg-primary);
    margin-bottom: 1rem;
}

.file-info {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 1rem 0;
}

.upload-btn {
    background: linear-gradient(135deg, var(--jpeg-primary), var(--primary-color));
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
}

.upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(220, 38, 38, 0.3);
}

/* Controls Section */
.controls-section {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--jpeg-accent);
    border-radius: 1rem;
    border: 1px solid var(--jpeg-secondary);
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.control-group label {
    font-weight: 600;
    color: var(--jpeg-primary);
    font-size: 0.9rem;
}

.control-group input[type="number"] {
    padding: 0.75rem;
    border: 2px solid var(--jpeg-secondary);
    border-radius: 0.5rem;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.control-group input[type="number"]:focus {
    outline: none;
    border-color: var(--jpeg-primary);
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

.control-group input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    height: 8px;
    background: var(--jpeg-secondary);
    border-radius: 1rem;
    outline: none;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    background: var(--jpeg-primary);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 6px rgba(220, 38, 38, 0.3);
}

.control-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--jpeg-primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 6px rgba(220, 38, 38, 0.3);
}

#qualityValue {
    font-weight: 600;
    color: var(--jpeg-primary);
    align-self: center;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.process-btn,
.download-btn,
.reset-btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
}

.process-btn {
    background: linear-gradient(135deg, var(--jpeg-primary), var(--primary-color));
    color: white;
}

.download-btn {
    background: linear-gradient(135deg, var(--success-color), var(--secondary-color));
    color: white;
}

.reset-btn {
    background: linear-gradient(135deg, var(--text-secondary), var(--text-primary));
    color: white;
}

.process-btn:hover,
.download-btn:hover,
.reset-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

/* Preview Section */
.preview-section {
    margin-bottom: 2rem;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.preview-item {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 1.5rem;
    border: 2px solid var(--jpeg-secondary);
    text-align: center;
}

.preview-item h4 {
    color: var(--jpeg-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 1.2rem;
}

.image-container {
    background: var(--jpeg-accent);
    border-radius: 0.5rem;
    padding: 1rem;
    margin-bottom: 1rem;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--jpeg-secondary);
}

.image-container img {
    max-width: 100%;
    max-height: 250px;
    border-radius: 0.5rem;
    box-shadow: 0 4px 15px rgba(220, 38, 38, 0.1);
}

.image-info {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.image-info span {
    padding: 0.25rem 0.75rem;
    background: var(--jpeg-accent);
    border-radius: 1rem;
    border: 1px solid var(--jpeg-secondary);
}

/* Progress Section */
.progress-section {
    margin-bottom: 2rem;
    text-align: center;
}

.progress-bar {
    width: 100%;
    height: 12px;
    background: var(--jpeg-secondary);
    border-radius: 1rem;
    overflow: hidden;
    margin-bottom: 1rem;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--jpeg-primary), var(--primary-color));
    border-radius: 1rem;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    color: var(--jpeg-primary);
    font-weight: 600;
    font-size: 1.1rem;
}

/* Status Message */
.status-message {
    text-align: center;
    padding: 1rem;
    border-radius: 0.75rem;
    font-weight: 600;
    margin-top: 1rem;
}

.status-message.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-message.error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.status-message.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

/* Guide Section */
.guide-section {
    margin-bottom: 3rem;
}

.guide-container {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(220, 38, 38, 0.1);
    border: 1px solid var(--jpeg-secondary);
}

.guide-container h2 {
    color: var(--jpeg-primary);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.guide-steps {
    display: grid;
    gap: 2rem;
}

.step {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--jpeg-primary), var(--primary-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(220, 38, 38, 0.3);
}

.step-content h3 {
    color: var(--jpeg-primary);
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.step-content p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Content Section */
.content-section {
    margin-bottom: 3rem;
}

.content-container {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(220, 38, 38, 0.1);
    border: 1px solid var(--jpeg-secondary);
}

.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.content-main h2,
.content-main h3 {
    color: var(--jpeg-primary);
    margin-bottom: 1rem;
}

.content-main h2 {
    font-size: 1.8rem;
    font-weight: 700;
}

.content-main h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-top: 2rem;
}

.content-main p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.content-main ul,
.content-main ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

.content-main li {
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.requirements-table {
    background: var(--jpeg-accent);
    padding: 1.5rem;
    border-radius: 0.75rem;
    margin: 1.5rem 0;
    border: 1px solid var(--jpeg-secondary);
}

.requirements-table h4 {
    color: var(--jpeg-primary);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.benefit {
    background: var(--jpeg-accent);
    padding: 1.5rem;
    border-radius: 0.75rem;
    border: 1px solid var(--jpeg-secondary);
    text-align: center;
}

.benefit h4 {
    color: var(--jpeg-primary);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.benefit p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 0;
}

/* Sidebar */
.content-sidebar {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.sidebar-widget {
    background: var(--jpeg-accent);
    padding: 1.5rem;
    border-radius: 0.75rem;
    border: 1px solid var(--jpeg-secondary);
}

.sidebar-widget h3 {
    color: var(--jpeg-primary);
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.related-links {
    list-style: none;
    padding: 0;
}

.related-links li {
    margin-bottom: 0.75rem;
}

.related-links a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 0;
    display: block;
    transition: color 0.3s ease;
}

.related-links a:hover {
    color: var(--jpeg-primary);
}

.sidebar-widget ul {
    list-style: none;
    padding: 0;
}

.sidebar-widget li {
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    padding-left: 1.5rem;
    position: relative;
}

.sidebar-widget li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--jpeg-primary);
    font-weight: bold;
}

/* FAQ Section */
.faq-section {
    margin-bottom: 3rem;
}

.faq-container {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(220, 38, 38, 0.1);
    border: 1px solid var(--jpeg-secondary);
}

.faq-container h2 {
    color: var(--jpeg-primary);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.faq-grid {
    display: grid;
    gap: 2rem;
}

.faq-item {
    background: var(--jpeg-accent);
    padding: 1.5rem;
    border-radius: 0.75rem;
    border: 1px solid var(--jpeg-secondary);
}

.faq-item h3 {
    color: var(--jpeg-primary);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.faq-item p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 0;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--jpeg-primary) 100%);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: var(--jpeg-secondary);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--jpeg-secondary);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: 2rem;
    text-align: center;
}

.footer-bottom p {
    margin-bottom: 1rem;
    opacity: 0.9;
}

.footer-meta {
    font-size: 0.9rem;
    opacity: 0.7;
}

.footer-meta span {
    margin: 0 0.5rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-container {
        padding: 0 1rem;
    }
    
    .nav-menu {
        display: none;
    }
    
    .main-container {
        padding: 1rem;
    }
    
    .hero-title {
        font-size: 2rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .tool-container {
        padding: 1.5rem;
    }
    
    .controls-grid {
        grid-template-columns: 1fr;
    }
    
    .action-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .preview-grid {
        grid-template-columns: 1fr;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .step {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .tool-container,
    .guide-container,
    .content-container,
    .faq-container {
        padding: 1rem;
    }
    
    .upload-area {
        padding: 2rem 1rem;
    }
    
    .controls-section {
        padding: 1rem;
    }
}

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

.tool-container,
.guide-container,
.content-container,
.faq-container {
    animation: fadeIn 0.6s ease-out;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
}

::-webkit-scrollbar-thumb {
    background: var(--jpeg-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--jpeg-primary);
}