/* Global Styles */
:root {
    --primary-color: #FF6B35;
    --primary-dark: #E55E2E;
    --primary-light: #FF8C5A;
    --secondary-color: #1A1A1A;
    --accent-color: #4ECDC4;
    --light-bg: #FFFFFF;
    --dark-bg: #F8F9FA;
    --card-bg: #FFFFFF;
    --text-light: #FFFFFF;
    --text-dark: #333333;
    --text-muted: #666666;
    --border-color: #E0E0E0;
    --success-color: #4CAF50;
    --error-color: #F44336;
    --warning-color: #FF9800;
    --shadow-sm: 0 4px 6px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.12);
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    --gradient-primary: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    --gradient-secondary: linear-gradient(135deg, var(--accent-color), #3db9b1);
}

/* CDN-ready: In production, use minified version style.min.css */

/* Focus styles for accessibility */
:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Preloader */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--light-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(255, 107, 53, 0.2);
    border-top: 5px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

body {
    font-family: 'Inter', 'Poppins', sans-serif;
    background-color: var(--light-bg);
    color: var(--text-dark);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    width: 90%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

h1 {
    font-size: 3.5rem;
    letter-spacing: -1px;
}

h2 {
    font-size: 2.5rem;
    letter-spacing: -0.5px;
    color: var(--primary-color);
}

h3 {
    font-size: 1.8rem;
}

p {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

/* Buttons */
.btn-primary, .btn-secondary, .browse-btn, .process-btn, .download-btn, .clear-btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
    border: 1px solid transparent;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    animation: pulse 1.5s infinite;
}

.btn-primary:active {
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary:active {
    transform: translateY(-1px);
}

.browse-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
}

.browse-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    animation: pulse 1s infinite;
}

.browse-btn:active {
    transform: translateY(-1px);
}

.process-btn, .download-btn {
    padding: 1.2rem 2.5rem;
    font-size: 1.2rem;
    min-width: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.process-btn:hover:not(:disabled), .download-btn:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    animation: pulse 1.5s infinite;
}

.process-btn:active:not(:disabled), .download-btn:active:not(:disabled) {
    transform: translateY(-1px);
}

.process-btn:disabled, .download-btn:disabled {
    background: #CCCCCC;
    cursor: not-allowed;
    transform: none;
}

.clear-btn {
    background: #ff4d4d;
    color: white;
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
    border-radius: var(--border-radius-sm);
}

.clear-btn:hover {
    background: #ff1a1a;
    transform: translateY(-2px);
}

.clear-btn:active {
    transform: translateY(-1px);
}

/* Loading Spinner */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Header & Navigation */
header {
    background-color: var(--light-bg);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
}

.logo h1 {
    font-size: 2rem;
    margin: 0;
}

.logo span:first-child {
    color: var(--primary-color);
}

.logo-dot {
    color: var(--primary-color);
}

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

.nav-item {
    margin-left: 2.5rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-link.active {
    color: var(--primary-color);
}

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

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 4px 0;
    transition: var(--transition-fast);
    border-radius: 2px;
}

/* Hero Section */
.hero {
    padding: 5rem 0;
    background: linear-gradient(135deg, #FFF5F0 0%, #FFECE6 100%);
    position: relative;
    overflow: hidden;
    background-size: 200% 200%;
    animation: gradientShift 10s ease infinite;
    clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,107,53,0.1) 0%, rgba(255,107,53,0) 70%);
    transform: rotate(30deg);
}

.hero-content {
    flex: 1;
    animation: fadeInLeft 1s ease;
}

.hero-content h1 {
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
    font-weight: 800;
}

.hero-content p {
    color: var(--text-muted);
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInRight 1s ease;
}

.image-placeholder {
    width: 100%;
    max-width: 500px;
    height: 350px;
    background: rgba(255, 255, 255, 0.8);
    border-radius: var(--border-radius-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 107, 53, 0.1);
    box-shadow: var(--shadow-md);
    animation: float 3s ease-in-out infinite;
}

.icon-large {
    font-size: 4rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

/* Converter Section */
.converter-section {
    padding: 5rem 0;
    position: relative;
    overflow: hidden;
}

.converter-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    background: var(--card-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 2.5rem;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.converter-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.converter-container:hover {
    transform: translateY(-5px) rotateY(2deg);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-light);
    animation: cardPulse 2s infinite;
}

.converter-container:hover::before {
    transform: scaleX(1);
}

.upload-area {
    border: 3px dashed var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 2.5rem;
    text-align: center;
    background-color: var(--light-bg);
    transition: all var(--transition-medium);
    cursor: pointer;
    min-height: 350px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background-color: rgba(255, 107, 53, 0.05);
    transform: scale(1.01) rotateY(1deg);
    transition: all 0.3s ease;
    animation: cardPulse 1.5s infinite;
}

.upload-area.dragover {
    border-color: var(--primary-color);
    background-color: rgba(255, 107, 53, 0.1);
    transform: scale(1.02);
    animation: pulse 2s infinite;
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    transition: var(--transition-fast);
}

.upload-area:hover .upload-icon {
    transform: scale(1.1);
}

.preview-area {
    display: flex;
    flex-direction: column;
}

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

.preview-header h3 {
    margin: 0;
    color: var(--secondary-color);
}

.image-preview {
    flex: 1;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    overflow-y: auto;
    max-height: 350px;
    padding: 1.5rem;
    background-color: var(--light-bg);
}

.preview-container {
    margin-bottom: 1.5rem;
    padding: 1.5rem;
    border-radius: var(--border-radius-md);
    background-color: var(--card-bg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
    border: 1px solid var(--border-color);
}

.preview-container:hover {
    transform: translateY(-3px) rotateY(2deg);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
    animation: cardPulse 1s infinite;
}

.preview-container img {
    max-width: 100%;
    border-radius: var(--border-radius-sm);
    margin-bottom: 1rem;
    box-shadow: var(--shadow-sm);
}

.preview-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.file-name {
    font-weight: 600;
    color: var(--secondary-color);
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 70%;
}

.dimensions {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0;
    background-color: var(--border-color);
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-weight: 500;
}

/* Progress Bar */
.progress-container {
    margin-top: 1.5rem;
}

.progress-bar {
    width: 100%;
    height: 10px;
    background-color: var(--border-color);
    border-radius: 5px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    border-radius: 5px;
    width: 0%;
    transition: width 0.3s ease;
}

.progress-text {
    text-align: center;
    margin-top: 0.5rem;
    font-weight: 500;
    color: var(--primary-color);
}

/* Controls Area */
.controls-area {
    grid-column: span 2;
    border-top: 1px solid var(--border-color);
    padding-top: 2.5rem;
}

.control-group {
    margin-bottom: 2rem;
    padding: 2rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    background-color: var(--light-bg);
    transition: var(--transition-fast);
}

.control-group:hover {
    transform: translateY(-3px) rotateY(2deg);
    box-shadow: var(--shadow-md);
    animation: cardPulse 1.5s infinite;
}

.control-group h3 {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    gap: 0.8rem;
}

.control-group h3 i {
    font-size: 1.2rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.7rem;
    font-weight: 500;
    color: var(--secondary-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    background-color: var(--card-bg);
    color: var(--text-dark);
    font-family: 'Inter', 'Poppins', sans-serif;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.2);
    transform: translateY(-2px);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.checkbox-group {
    display: flex;
    align-items: center;
    padding: 0.8rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
}

.checkbox-group:hover {
    background-color: rgba(255, 107, 53, 0.1);
    border-color: var(--primary-color);
}

.checkbox-group input {
    width: auto;
    margin-right: 0.8rem;
    transform: scale(1.3);
    cursor: pointer;
}

.checkbox-group label {
    margin: 0;
    font-weight: 500;
    cursor: pointer;
    color: var(--secondary-color);
}

.actions {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

/* Features Section */
.features-section {
    padding: 5rem 0;
    background-color: var(--dark-bg);
    position: relative;
    overflow: hidden;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 1.5rem;
    color: var(--text-muted);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.feature-card {
    background: var(--card-bg);
    border-radius: var(--border-radius-md);
    padding: 2.5rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    text-align: center;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px) rotateY(5deg);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
    animation: cardPulse 2s infinite;
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
}

.feature-card h3 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.feature-card p {
    margin: 0;
    color: var(--text-muted);
}

/* How It Works Section */
.how-it-works {
    padding: 5rem 0;
    background-color: var(--light-bg);
    position: relative;
    overflow: hidden;
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 2rem;
    border-radius: var(--border-radius-md);
    background: var(--card-bg);
    box-shadow: var(--shadow-md);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.step::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.step:hover {
    transform: translateY(-5px) rotateY(3deg);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
    animation: cardPulse 2s infinite;
}

.step:hover::before {
    transform: scaleX(1);
}

.step-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 107, 53, 0.1);
    transition: all 0.3s ease;
}

.step:hover .step-icon {
    transform: scale(1.1) rotate(10deg);
    background: rgba(255, 107, 53, 0.2);
}

.step-content h3 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.step-content p {
    margin: 0;
    color: var(--text-muted);
}

/* Testimonials Section */
.testimonials-section {
    padding: 5rem 0;
    background-color: var(--dark-bg);
    position: relative;
    overflow: hidden;
}

.testimonials-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.testimonial {
    background: var(--card-bg);
    border-radius: var(--border-radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    position: relative;
    overflow: hidden;
}

.testimonial::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.testimonial:hover {
    transform: translateY(-5px) rotateY(3deg);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
    animation: cardPulse 2s infinite;
}

.testimonial:hover::before {
    transform: scaleX(1);
}

.testimonial-content {
    margin-bottom: 1.5rem;
    position: relative;
}

.testimonial-content p {
    font-style: italic;
    margin: 0;
    color: var(--text-dark);
    position: relative;
}

.testimonial-content p::before {
    content: '"';
    font-size: 4rem;
    position: absolute;
    top: -20px;
    left: -15px;
    color: rgba(255, 107, 53, 0.1);
    font-family: Georgia, serif;
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.author-info h4 {
    margin: 0 0 0.3rem 0;
    color: var(--secondary-color);
}

.author-info p {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Form validation styles */
.error-message {
    color: var(--error-color);
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: none;
}

.form-group input.invalid,
.form-group textarea.invalid,
.form-group select.invalid {
    border-color: var(--error-color);
    box-shadow: 0 0 0 3px rgba(244, 67, 54, 0.2);
}

.form-group input.valid,
.form-group textarea.valid,
.form-group select.valid {
    border-color: var(--success-color);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.2);
}

/* Ad Slot */
.ad-slot {
    text-align: center;
    padding: 3rem 0;
    margin: 3rem 0;
}

.ad-content {
    max-width: 728px;
    margin: 0 auto;
    background-color: var(--light-bg);
    border-radius: var(--border-radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.ad-placeholder {
    height: 90px;
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    border-radius: var(--border-radius-sm);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { background-position: -200px 0; }
    100% { background-position: 200px 0; }
}

/* Footer */
footer {
    background: linear-gradient(135deg, #1A1A1A 0%, #2D2D2D 100%);
    color: var(--text-light);
    padding: 4rem 0 2rem;
    margin-top: 3rem;
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2.5rem;
    margin-bottom: 3rem;
}

.footer-section h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

.footer-section h4 {
    margin-bottom: 1.5rem;
    color: var(--text-light);
    font-size: 1.3rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.footer-section h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background: var(--primary-color);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.8rem;
}

.footer-section ul li a {
    color: #CCCCCC;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    display: block;
    padding: 0.3rem 0;
    position: relative;
}

.footer-section ul li a::before {
    content: '»';
    position: absolute;
    left: -15px;
    opacity: 0;
    transition: all 0.3s ease;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
    transform: translateX(5px);
    padding-left: 10px;
}

.footer-section ul li a:hover::before {
    opacity: 1;
    left: 0;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-links a {
    font-size: 1.5rem;
    color: #CCCCCC;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
}

.social-links a:hover {
    color: var(--primary-color);
    transform: translateY(-3px);
    background-color: rgba(255, 107, 53, 0.1);
    box-shadow: 0 5px 15px rgba(255, 107, 53, 0.2);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-weight: 500;
    color: #CCCCCC;
}

/* Notifications */
.notification-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1001;
}

.notification {
    padding: 1.2rem 1.8rem;
    border-radius: var(--border-radius-md);
    color: white;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    transform: translateX(150%);
    transition: transform 0.3s ease;
    max-width: 400px;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    background: linear-gradient(135deg, var(--success-color), #45a049);
}

.notification.error {
    background: linear-gradient(135deg, var(--error-color), #d32f2f);
}

.notification.info {
    background: linear-gradient(135deg, var(--accent-color), #3db9b1);
}

.notification.warning {
    background: linear-gradient(135deg, var(--warning-color), #f57c00);
}

/* Animations */
@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 107, 53, 0.7);
    }
    70% {
        transform: scale(1.05);
        box-shadow: 0 0 0 10px rgba(255, 107, 53, 0);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(255, 107, 53, 0);
    }
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
    100% {
        transform: translateY(0px);
    }
}

@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

@keyframes cardPulse {
    0% {
        box-shadow: var(--shadow-md);
    }
    50% {
        box-shadow: var(--shadow-lg);
    }
    100% {
        box-shadow: var(--shadow-md);
    }
}

/* Additional Info Section */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.info-card {
    background: var(--card-bg);
    border-radius: var(--border-radius-md);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition-medium);
    border: 1px solid var(--border-color);
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.info-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.info-card h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.info-card p {
    color: var(--text-muted);
    margin-bottom: 0;
}

/* Enhanced Responsive Design for Better Mobile, Tablet, and PC Support */

/* Large Desktops (1400px and above) */
@media (min-width: 1400px) {
    .container {
        max-width: 1600px;
    }
    
    .hero-content h1 {
        font-size: 4rem;
    }
    
    .hero-content p {
        font-size: 1.4rem;
        max-width: 700px;
    }
    
    .converter-container {
        padding: 3rem;
    }
    
    .feature-card,
    .step,
    .testimonial,
    .info-card {
        padding: 3rem;
    }
}

/* Desktops (1200px - 1399px) */
@media (max-width: 1200px) {
    .container {
        width: 95%;
    }
    
    h1 {
        font-size: 3rem;
    }
    
    h2 {
        font-size: 2.3rem;
    }
    
    .hero-content p {
        font-size: 1.2rem;
    }
    
    .converter-container {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
    
    .controls-area {
        grid-column: span 2;
    }
}

/* Large Tablets/Laptops (992px - 1199px) */
@media (max-width: 992px) {
    .converter-container {
        grid-template-columns: 1fr;
    }
    
    .controls-area {
        grid-column: span 1;
    }
    
    .hero {
        text-align: center;
        clip-path: polygon(0 0, 100% 0, 100% 95%, 0 100%);
        padding: 4rem 0;
    }
    
    .hero-content {
        margin-bottom: 3rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    h1 {
        font-size: 2.8rem;
    }
    
    h2 {
        font-size: 2.2rem;
    }
    
    .feature-card,
    .step,
    .testimonial {
        transform: rotateY(0deg);
    }
    
    .steps-container,
    .testimonials-container,
    .features-grid {
        gap: 1.5rem;
    }
    
    .image-placeholder {
        height: 300px;
    }
    
    .nav-container {
        padding: 1rem 0;
    }
}

/* Medium Tablets (768px - 991px) */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background-color: var(--light-bg);
        width: 100%;
        text-align: center;
        transition: var(--transition-medium);
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
        border-radius: 0 0 var(--border-radius-md) var(--border-radius-md);
        border: 1px solid var(--border-color);
        backdrop-filter: blur(10px);
        z-index: 1000;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-item {
        margin: 1.5rem 0;
    }

    .hamburger {
        display: flex;
        z-index: 1001;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }
    
    .actions {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .process-btn, .download-btn {
        width: 100%;
        max-width: 300px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .btn-primary, .btn-secondary {
        width: 100%;
        max-width: 300px;
    }
    
    .features-grid,
    .steps-container,
    .testimonials-container {
        grid-template-columns: 1fr;
    }
    
    .converter-container {
        padding: 1.5rem;
        gap: 2rem;
    }
    
    .control-group {
        padding: 1.5rem;
    }
    
    .upload-area {
        min-height: 300px;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .section-header p {
        font-size: 1.1rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
    
    .info-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .hero-content p {
        font-size: 1.1rem;
    }
}

/* Small Tablets/Large Phones (600px - 767px) */
@media (max-width: 600px) {
    .container {
        width: 95%;
        padding: 0 15px;
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    h3 {
        font-size: 1.6rem;
    }
    
    .hero {
        padding: 3rem 0;
        clip-path: polygon(0 0, 100% 0, 100% 95%, 0 100%);
    }
    
    .hero-content p {
        font-size: 1.1rem;
    }
    
    .converter-container {
        padding: 1.2rem;
        gap: 1.5rem;
    }
    
    .upload-area {
        min-height: 250px;
        padding: 2rem 1rem;
    }
    
    .control-group {
        padding: 1.2rem;
    }
    
    .preview-info {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .file-name {
        max-width: 100%;
    }
    
    .btn-primary, .btn-secondary, .browse-btn, .process-btn, .download-btn, .clear-btn {
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
    }
    
    .process-btn, .download-btn {
        padding: 1rem 2rem;
        font-size: 1.1rem;
        min-width: auto;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .feature-card,
    .step,
    .testimonial,
    .info-card {
        padding: 1.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .footer-section {
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .notification {
        max-width: 90vw;
        padding: 1rem 1.5rem;
        font-size: 0.9rem;
    }
    
    .nav-item {
        margin: 1rem 0;
    }
    
    .logo h1 {
        font-size: 1.8rem;
    }
    
    .upload-content h3 {
        font-size: 1.5rem;
    }
    
    .upload-content p {
        font-size: 1rem;
    }
}

/* Phones (480px - 599px) */
@media (max-width: 480px) {
    .container {
        width: 95%;
        padding: 0 10px;
    }
    
    h1 {
        font-size: 2.2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    h3 {
        font-size: 1.5rem;
    }
    
    .hero {
        padding: 2.5rem 0;
        clip-path: polygon(0 0, 100% 0, 100% 95%, 0 100%);
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .converter-container {
        padding: 1rem;
        gap: 1.5rem;
    }
    
    .upload-area {
        padding: 1.2rem;
        min-height: 220px;
    }
    
    .upload-icon {
        font-size: 3rem;
        margin-bottom: 1rem;
    }
    
    .control-group {
        padding: 1rem;
        margin-bottom: 1.2rem;
    }
    
    .form-group {
        margin-bottom: 1.2rem;
    }
    
    .preview-info {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .file-name {
        max-width: 100%;
        font-size: 0.9rem;
    }
    
    .dimensions {
        font-size: 0.8rem;
        padding: 0.3rem 0.6rem;
    }
    
    .btn-primary, .btn-secondary, .browse-btn, .process-btn, .download-btn, .clear-btn {
        padding: 0.7rem 1.2rem;
        font-size: 0.9rem;
    }
    
    .process-btn, .download-btn {
        padding: 0.9rem 1.5rem;
        font-size: 1rem;
    }
    
    .section-header h2 {
        font-size: 1.6rem;
    }
    
    .section-header p {
        font-size: 1rem;
    }
    
    .feature-card,
    .step,
    .testimonial,
    .info-card {
        padding: 1.2rem;
    }
    
    .feature-icon,
    .step-icon,
    .info-icon {
        font-size: 2rem;
        margin-bottom: 1rem;
    }
    
    .footer-bottom {
        font-size: 0.9rem;
    }
    
    .preview-container {
        padding: 1rem;
        margin-bottom: 1rem;
    }
    
    .actions {
        gap: 0.8rem;
    }
    
    .hero-buttons {
        gap: 0.8rem;
    }
    
    .nav-item {
        margin: 0.8rem 0;
    }
    
    .logo h1 {
        font-size: 1.6rem;
    }
    
    .upload-content h3 {
        font-size: 1.3rem;
    }
    
    .control-group h3 {
        font-size: 1.3rem;
    }
}

/* Small Phones (320px - 479px) */
@media (max-width: 320px) {
    .container {
        width: 95%;
        padding: 0 8px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.6rem;
    }
    
    h3 {
        font-size: 1.3rem;
    }
    
    .hero {
        padding: 2rem 0;
    }
    
    .converter-container {
        padding: 0.8rem;
        gap: 1rem;
    }
    
    .upload-area {
        min-height: 200px;
        padding: 1rem;
    }
    
    .upload-icon {
        font-size: 2.5rem;
    }
    
    .control-group {
        padding: 0.8rem;
    }
    
    .btn-primary, .btn-secondary, .browse-btn, .process-btn, .download-btn, .clear-btn {
        padding: 0.6rem 1rem;
        font-size: 0.8rem;
    }
    
    .feature-card,
    .step,
    .testimonial,
    .info-card {
        padding: 1rem;
    }
    
    .logo h1 {
        font-size: 1.4rem;
    }
}

/* Enhanced mobile touch targets and accessibility */
@media (hover: none) and (pointer: coarse) {
    /* Increase touch target sizes for mobile devices */
    .btn-primary, .btn-secondary, .browse-btn, .process-btn, .download-btn, .clear-btn {
        min-height: 44px; /* Minimum touch target size */
        min-width: 44px;
        padding: 1rem 1.5rem;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        min-height: 44px;
        padding: 0.8rem;
    }
    
    .nav-link {
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
        padding: 1rem 0;
    }
    
    .checkbox-group {
        min-height: 44px;
        padding: 1rem;
    }
    
    .checkbox-group input {
        transform: scale(1.5);
        margin-right: 1rem;
    }
    
    .hamburger {
        padding: 0.5rem;
    }
    
    .bar {
        width: 30px;
        height: 4px;
    }
    
    /* Improve scroll behavior on mobile */
    html {
        scroll-behavior: smooth;
    }
    
    /* Prevent zoom on form focus */
    input, select, textarea {
        font-size: 16px; /* Prevents iOS Safari zoom */
    }
    
    /* Adjust spacing for better touch interaction */
    .form-group {
        margin-bottom: 1.5rem;
    }
    
    .control-group {
        margin-bottom: 2rem;
    }
}

/* Orientation-specific adjustments */
@media (orientation: landscape) and (max-height: 500px) {
    .hero {
        padding: 2rem 0;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 0.9rem;
    }
    
    .converter-container {
        padding: 1rem;
    }
    
    .upload-area {
        min-height: 180px;
    }
}

@media (orientation: portrait) {
    .hero {
        padding: 4rem 0;
    }
}

/* High-resolution display optimizations */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .feature-icon,
    .step-icon,
    .info-icon,
    .upload-icon {
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
}

/* Print styles */
@media print {
    .navbar,
    .hero-buttons,
    .converter-section,
    .features-section,
    .how-it-works,
    .testimonials-section,
    .ad-slot,
    .footer,
    .notification-container,
    .hamburger,
    .nav-menu {
        display: none;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
        color: black;
        background: white;
    }
    
    .container {
        width: 100%;
        max-width: 100%;
        padding: 0;
    }
    
    h1, h2, h3 {
        color: black;
        page-break-after: avoid;
    }
    
    p {
        color: black;
        orphans: 3;
        widows: 3;
    }
}