/* PWA Specific Styles - Hide elements when running as installed app */
@media (display-mode: standalone) {
    h1 {
        display: none !important;
    }

    .subtitle {
        display: none !important;
    }
}

/* Modern CSS Reset and Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    color: #2d3748;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Modern Navbar Styles */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    color: #2d3748;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 32px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-left {
    display: flex;
    align-items: center;
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.navbar-brand {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: all 0.2s ease;
}

.navbar-brand:hover {
    transform: scale(1.02);
}

.navbar-logo {
    height: 40px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
    transition: all 0.2s ease;
}

.navbar-logo:hover {
    transform: scale(1.05);
}

.navbar-nav {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 2rem;
}

.navbar-nav li {
    margin: 0;
}

.navbar-nav a {
    color: #4a5568;
    text-decoration: none;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.2s ease;
    position: relative;
}

.navbar-nav a:hover {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    transform: translateY(-1px);
}

/* Mobile Navbar Toggle Button */
.navbar-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 4px;
    padding: 8px;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.navbar-toggle:hover {
    background: rgba(102, 126, 234, 0.1);
}

.hamburger-line {
    width: 24px;
    height: 3px;
    background: #4a5568;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.navbar-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.navbar-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.navbar-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Mobile Responsive Styles */
@media (max-width: 768px) {
    .navbar {
        padding: 12px 16px;
        position: relative;
        flex-direction: row;
        justify-content: space-between;
        width: 100%;
        min-height: 50px;
    }

    .navbar-left {
        flex: 1;
    }

    .navbar-right {
        gap: 0.5rem;
        justify-content: flex-end;
    }

    /* Hide desktop navigation on mobile */
    .navbar-nav {
        display: none;
    }

    /* Show navigation when hamburger is active */
    .navbar-nav.active {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        display: flex;
        flex-direction: column;
        gap: 0;
        padding: 16px 0;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
        border-top: 1px solid rgba(255, 255, 255, 0.2);
        z-index: 999;
    }

    /* Always show hamburger toggle on mobile */
    .navbar-toggle {
        display: flex;
    }

    .navbar-logo {
        height: 32px;
        max-width: 150px;
    }

    /* Dropdown menu item styling */
    .navbar-nav.active li {
        width: 100%;
    }

    .navbar-nav.active a {
        display: block;
        padding: 12px 24px;
        border-radius: 0;
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        text-decoration: none;
    }

    .navbar-nav.active a:hover {
        background: rgba(102, 126, 234, 0.08);
        transform: none;
    }

    .navbar-nav.active li:last-child a {
        border-bottom: none;
    }
}

/* Main Content Wrapper */
.main-content-wrapper {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    padding: 2rem;
    min-height: calc(100vh - 200px);
}

/* File Transfer Container */
.container {
    padding: 3rem 2.5rem;
    max-width: 1200px;
    width: 90%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    margin: 1rem 0;
    position: relative;
    z-index: 10;
    text-align: center;
    min-height: 500px; /* Reserve minimum space to prevent layout shift */
}

/* Content Area for Home, About, Privacy, Terms */
.content {
    padding: 3rem 2.5rem;
    max-width: 1000px;
    width: 75%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    margin: 2rem 0;
    min-height: 500px;
}

.content h1 {
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
    margin-bottom: 2rem;
    font-weight: 700;
    font-size: 2.5rem;
    letter-spacing: -0.025em;
}

.content p {
    line-height: 1.7;
    margin-bottom: 1.5rem;
    color: #4a5568;
    font-size: 1.1rem;
}

/* Modern Button Styles */
.btn {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.3);
    border: 1px solid transparent;
    letter-spacing: 0.025em;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(102, 126, 234, 0.4);
    filter: brightness(1.1);
}

.btn:active {
    transform: translateY(0);
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.3);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.2);
}

/* Modern Footer Styles */
.footer-main {
    background: rgba(45, 55, 72, 0.95);
    backdrop-filter: blur(20px);
    color: #e2e8f0;
    padding: 2rem;
    margin-top: auto;
    font-size: 0.9rem;
    width: 100%;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.footer-links a {
    color: #a78bfa;
    text-decoration: none;
    transition: all 0.2s ease;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 6px;
}

.footer-links a:hover {
    color: #c4b5fd;
    background: rgba(167, 139, 250, 0.1);
    transform: translateY(-1px);
}

.footer-social {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.footer-social a {
    color: #e2e8f0;
    font-size: 1.2rem;
    padding: 0.75rem;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    text-decoration: none;
}

.footer-social a:hover {
    background: rgba(167, 139, 250, 0.2);
    color: #c4b5fd;
    transform: translateY(-2px) scale(1.1);
}

.footer-social a[aria-label*="Twitter"]:hover {
    background: rgba(29, 155, 240, 0.2);
    color: #1d9bf0;
}

.footer-social a[aria-label*="Facebook"]:hover {
    background: rgba(24, 119, 242, 0.2);
    color: #1877f2;
}

.footer-social a[aria-label*="LinkedIn"]:hover {
    background: rgba(10, 102, 194, 0.2);
    color: #0a66c2;
}

.footer-social a[aria-label*="Reddit"]:hover {
    background: rgba(255, 69, 0, 0.2);
    color: #ff4500;
}

.footer-social a[aria-label*="Email"]:hover {
    background: rgba(229, 62, 62, 0.2);
    color: #e53e3e;
}

.footer-copyright {
    margin: 0;
    font-size: 0.85rem;
    opacity: 0.8;
    text-align: center;
}

/* Enhanced Mobile Responsiveness */
@media screen and (max-width: 768px) {
    .navbar-right {
        gap: 0.75rem;
    }

    .navbar-logo {
        height: 28px;
        max-width: 140px;
    }

    .content {
        padding: 2rem 1.5rem;
        margin: 1rem;
        border-radius: 16px;
    }

    .content h1 {
        font-size: 2rem;
    }

    .main-content-wrapper {
        padding: 1rem;
        min-height: 500px;
    }

    .content {
        width: 85%;
    }

    .btn {
        padding: 12px 24px;
        font-size: 0.95rem;
        width: 100%;
        max-width: 300px;
    }
}

@media screen and (max-width: 480px) {
    .navbar {
        padding: 0.75rem;
    }

    .navbar-logo {
        height: 24px;
        max-width: 120px;
    }

    .navbar-right {
        gap: 0.25rem;
    }

    .content {
        padding: 1.5rem 1rem;
        margin: 0.5rem;
        border-radius: 12px;
    }

    .content h1 {
        font-size: 1.75rem;
    }

    .main-content-wrapper {
        padding: 0.5rem;
        
    }

    .content {
        width: 90%;
    }

    .footer-main {
        padding: 1.5rem 1rem;
        font-size: 0.85rem;
    }

    .footer-content {
        gap: 1rem;
    }

    .footer-links {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }

    .footer-links a {
        padding: 0.5rem;
        margin: 0.25rem;
    }

    .footer-social {
        gap: 0.75rem;
    }

    .footer-social a {
        width: 40px;
        height: 40px;
        font-size: 1.1rem;
    }

    .footer-copyright {
        font-size: 0.8rem;
    }
}

/* Additional styles for content pages */
.content h2 {
    color: #4a5568;
    font-weight: 600;
    font-size: 1.5rem;
    margin: 2rem 0 1rem 0;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid rgba(102, 126, 234, 0.1);
}

.content ul {
    margin: 1rem 0;
    padding-left: 2rem;
}

.content li {
    margin: 0.5rem 0;
    line-height: 1.6;
}

.content code {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    font-size: 0.9rem;
}

.call-to-action {
    text-align: center;
    margin: 2.5rem 0;
}

.call-to-action .btn {
    padding: 16px 32px;
    font-size: 1.1rem;
    min-width: 200px;
}

/* Professional How-To Section Styling */
.how-to-section {
    margin: 4rem auto;
    padding: 3rem 2rem;
    max-width: 1000px;
    width: 90%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-align: center;
}

.how-to-section h2 {
    font-size: 2.2rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 1.5rem;
    text-align: left;
    line-height: 1.3;
}

.how-to-intro {
    font-size: 1.2rem;
    color: #4a5568;
    line-height: 1.7;
    margin-bottom: 3rem;
    text-align: left;
    font-weight: 400;
}

.steps-container {
    margin-bottom: 4rem;
}

.step-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 3rem;
    padding: 2rem;
    background: rgba(102, 126, 234, 0.03);
    border-radius: 16px;
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.step-item:hover {
    background: rgba(102, 126, 234, 0.06);
    transform: translateX(5px);
}

.step-number {
    font-size: 2rem;
    min-width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 12px;
    margin-right: 2rem;
    font-weight: 600;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
    text-align: left;
}

.step-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.step-content p {
    font-size: 1.1rem;
    color: #4a5568;
    line-height: 1.7;
    margin-bottom: 1.2rem;
    text-align: left;
}

.how-to-advantages {
    margin: 4rem 0;
    padding: 2.5rem;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05), rgba(159, 122, 234, 0.05));
    border-radius: 16px;
    border: 1px solid rgba(102, 126, 234, 0.1);
}

.how-to-advantages h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 2rem;
    text-align: left;
}

.advantages-content p {
    font-size: 1.1rem;
    color: #4a5568;
    line-height: 1.7;
    margin-bottom: 1.5rem;
    text-align: left;
}

.advantages-content strong {
    color: var(--primary-color);
    font-weight: 600;
}

.how-to-cta {
    text-align: center;
    padding: 2.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 16px;
    color: white;
    margin-top: 3rem;
}

.how-to-cta h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: white;
}

.how-to-cta p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    line-height: 1.6;
}

.how-to-btn {
    background: white;
    color: var(--primary-color);
    border: none;
    padding: 14px 32px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.how-to-btn:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

/* Responsive Design for How-To Section */
@media (max-width: 768px) {
    .how-to-section {
        margin: 2rem auto;
        padding: 2rem 1.5rem;
        width: 95%;
    }

    .how-to-section h2 {
        font-size: 1.8rem;
    }

    .how-to-intro {
        font-size: 1.1rem;
    }

    .step-item {
        flex-direction: column;
        text-align: left;
        padding: 1.5rem;
    }

    .step-number {
        margin-right: 0;
        margin-bottom: 1rem;
        align-self: flex-start;
    }

    .step-content h3 {
        font-size: 1.3rem;
    }

    .step-content p {
        font-size: 1rem;
    }

    .how-to-advantages {
        padding: 2rem 1.5rem;
    }

    .how-to-advantages h3 {
        font-size: 1.5rem;
    }

    .advantages-content p {
        font-size: 1rem;
    }

    .how-to-cta {
        padding: 2rem 1.5rem;
    }

    .how-to-cta h3 {
        font-size: 1.5rem;
    }
}

/* Professional Why Choose Section Styling */
.why-choose-section {
    margin: 4rem auto;
    padding: 3rem 2rem;
    max-width: 1000px;
    width: 90%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-align: center;
}

.why-choose-section h2 {
    font-size: 2.2rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 1.5rem;
    text-align: left;
    line-height: 1.3;
}

.why-choose-intro {
    font-size: 1.2rem;
    color: #4a5568;
    line-height: 1.7;
    margin-bottom: 3rem;
    text-align: left;
    font-weight: 400;
}

.advantages-container {
    margin-bottom: 4rem;
}

.advantage-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 3rem;
    padding: 2rem;
    background: rgba(102, 126, 234, 0.03);
    border-radius: 16px;
    border-left: 4px solid var(--secondary-color);
    transition: all 0.3s ease;
}

.advantage-item:hover {
    background: rgba(159, 122, 234, 0.06);
    transform: translateX(5px);
}

.advantage-icon {
    font-size: 2rem;
    min-width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--secondary-color), #764ba2);
    color: white;
    border-radius: 12px;
    margin-right: 2rem;
    font-weight: 600;
    flex-shrink: 0;
}

.advantage-content {
    flex: 1;
    text-align: left;
}

.advantage-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.advantage-content p {
    font-size: 1.1rem;
    color: #4a5568;
    line-height: 1.7;
    margin-bottom: 1.2rem;
    text-align: left;
}

.use-cases-section {
    margin: 4rem 0;
    padding: 2.5rem;
    background: linear-gradient(135deg, rgba(159, 122, 234, 0.05), rgba(102, 126, 234, 0.05));
    border-radius: 16px;
    border: 1px solid rgba(159, 122, 234, 0.1);
}

.use-cases-section h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 2rem;
    text-align: left;
}

.use-cases-content p {
    font-size: 1.1rem;
    color: #4a5568;
    line-height: 1.7;
    margin-bottom: 1.5rem;
    text-align: left;
}

.use-cases-content strong {
    color: var(--secondary-color);
    font-weight: 600;
}

.why-choose-cta {
    text-align: center;
    padding: 2.5rem;
    background: linear-gradient(135deg, var(--secondary-color), #764ba2);
    border-radius: 16px;
    color: white;
    margin-top: 3rem;
}

.why-choose-cta h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: white;
}

.why-choose-cta p {
    font-size: 1.1rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    line-height: 1.6;
}

.why-choose-btn {
    background: white;
    color: var(--secondary-color);
    border: none;
    padding: 14px 32px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.why-choose-btn:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

/* Responsive Design for Why Choose Section */
@media (max-width: 768px) {
    .why-choose-section {
        margin: 2rem auto;
        padding: 2rem 1.5rem;
        width: 95%;
    }

    .why-choose-section h2 {
        font-size: 1.8rem;
    }

    .why-choose-intro {
        font-size: 1.1rem;
    }

    .advantage-item {
        flex-direction: column;
        text-align: left;
        padding: 1.5rem;
    }

    .advantage-icon {
        margin-right: 0;
        margin-bottom: 1rem;
        align-self: flex-start;
    }

    .advantage-content h3 {
        font-size: 1.3rem;
    }

    .advantage-content p {
        font-size: 1rem;
    }

    .use-cases-section {
        padding: 2rem 1.5rem;
    }

    .use-cases-section h3 {
        font-size: 1.5rem;
    }

    .use-cases-content p {
        font-size: 1rem;
    }

    .why-choose-cta {
        padding: 2rem 1.5rem;
    }

    .why-choose-cta h3 {
        font-size: 1.5rem;
    }
}

/* ===== SHARED COMPONENT STYLES ===== */
/* These styles were moved from inline <style> blocks to reduce duplication */

:root {
    --primary-gradient: linear-gradient(135deg, #667eea, #764ba2);
    --primary-color: #667eea;
    --secondary-color: rgba(102, 126, 234, 0.1);
    --text-color: #2d3748;
    --text-muted: #4a5568;
    --border-color: rgba(255, 255, 255, 0.2);
    --success-color: #48bb78;
    --error-color: #f56565;
    --glass-bg: rgba(255, 255, 255, 0.95);
    --shadow-light: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 8px 32px rgba(0, 0, 0, 0.15);
    --shadow-heavy: 0 20px 60px rgba(0, 0, 0, 0.1);
    --border-radius: 16px;
    --border-radius-lg: 24px;
}

/* Container override for file transfer pages */
.container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
}

/* Typography overrides */
h1 {
    font-weight: 700;
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 2.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.025em;
}

.subtitle {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
    font-weight: 400;
}

/* File upload area */
.drop-area {
    border: 2px dashed rgba(102, 126, 234, 0.3);
    border-radius: var(--border-radius);
    padding: 4rem 2rem;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    background: rgba(102, 126, 234, 0.03);
    position: relative;
    overflow: hidden;
}

.drop-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.1), transparent);
    transition: left 0.6s ease;
}

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

.drop-area.dragover {
    border-color: var(--primary-color);
    background: var(--secondary-color);
    transform: scale(1.02);
    box-shadow: var(--shadow-medium);
}

.drop-area p {
    margin: 0;
    font-size: 1.2rem;
    color: var(--text-muted);
    font-weight: 500;
    position: relative;
    z-index: 1;
    text-align: center;
}

.drop-area .upload-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 1rem;
    opacity: 0.6;
}

.file-input {
    display: none;
}

/* Button variations */
.btn-small {
    padding: 10px 20px;
    font-size: 0.9rem;
    min-width: 120px;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(102, 126, 234, 0.2);
}

.btn-small:hover {
    background: var(--primary-gradient);
    color: white;
    border-color: transparent;
}

.btn-cancel {
    background: #dc3545;
    box-shadow: 0 4px 16px rgba(220, 53, 69, 0.3);
}

.btn-cancel:hover {
    box-shadow: 0 8px 32px rgba(220, 53, 69, 0.4);
}

/* Sharing components */
.share-screen, .receive-screen {
    display: none;
}

.share-link {
    width: 100%;
    padding: 16px;
    border: 1px solid rgba(102, 126, 234, 0.2);
    border-radius: var(--border-radius);
    font-size: 1rem;
    margin: 1rem 0;
    text-align: center;
    background: rgba(102, 126, 234, 0.05);
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    color: var(--text-color);
    transition: all 0.2s ease;
}

.share-link:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.share-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 1.5rem 0;
    flex-wrap: wrap;
}

#qr-code {
    margin: 2rem auto;
    display: block;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-light);
    background: white;
    padding: 1rem;
}

#share-btn {
    display: none;
}

/* Progress bars */
.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 8px;
    margin: 1.5rem 0;
    overflow: hidden;
    position: relative;
}

.progress-bar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    animation: shimmer 2s infinite;
}

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

.progress-bar-inner {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, var(--success-color), #68d391);
    border-radius: 8px;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

/* Status indicators */
.status-text {
    font-weight: 500;
    padding: 1rem;
    border-radius: var(--border-radius);
    margin: 1rem 0;
}

.status-waiting {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
    border: 1px solid rgba(102, 126, 234, 0.2);
}

.status-success {
    background: rgba(72, 187, 120, 0.1);
    color: #2f855a;
    border: 1px solid rgba(72, 187, 120, 0.2);
}

.status-error {
    background: rgba(245, 101, 101, 0.1);
    color: #c53030;
    border: 1px solid rgba(245, 101, 101, 0.2);
}

/* Browser compatibility warnings */
.compatibility-warning {
    background: rgba(251, 191, 36, 0.1);
    color: #92400e;
    padding: 1rem;
    border-radius: var(--border-radius);
    border: 1px solid rgba(251, 191, 36, 0.2);
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    font-weight: 500;
}

/* File info display */
.file-info {
    background: rgba(102, 126, 234, 0.05);
    border: 1px solid rgba(102, 126, 234, 0.1);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin: 1.5rem 0;
    text-align: left;
}

.file-info strong {
    color: var(--text-color);
    font-weight: 600;
}

.file-info p {
    margin: 0.5rem 0;
    font-size: 1rem;
}

/* Security badge */
.security-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: rgba(72, 187, 120, 0.1);
    border: 1px solid rgba(72, 187, 120, 0.2);
    border-radius: 12px;
    color: #2f855a;
    font-weight: 500;
    font-size: 0.9rem;
}

.footer {
    margin-top: 3rem;
    font-size: 0.9rem;
    color: rgba(74, 85, 104, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.footer svg {
    width: 20px;
    height: 20px;
    opacity: 0.6;
}

/* FAQ Section Styles */
.faq-section {
    margin-top: 3rem;
    width: 100%;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 1rem;
    border: 1px solid rgba(102, 126, 234, 0.1);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: var(--shadow-light);
}

.faq-question {
    background: rgba(102, 126, 234, 0.05);
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.faq-question:hover {
    background: rgba(102, 126, 234, 0.1);
}

.faq-question h3 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-color);
    flex: 1;
    padding: 0;
}

.faq-toggle {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    transition: transform 0.3s ease;
    margin-left: 1rem;
}

.faq-toggle.active {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-answer.active {
    padding: 1.5rem;
    max-height: 200px;
}

.faq-answer p {
    margin: 0;
    color: var(--text-muted);
    line-height: 1.6;
    padding: 0;
}

/* Enhanced mobile responsiveness for shared components */
@media (max-width: 768px) {
    .container {
        width: 98%;
        padding: 1.5rem 1rem;
        margin: 0.5rem auto;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
        padding: 0 0.5rem;
    }

    h3 {
        font-size: 1.3rem;
        margin-bottom: 1rem;
        padding: 0 0.5rem;
    }

    p {
        font-size: 1rem;
        line-height: 1.6;
        margin-bottom: 1.5rem;
        padding: 0 0.5rem;
    }

    .drop-area {
        padding: 3rem 1.5rem;
    }

    .share-actions {
        flex-direction: column;
        align-items: center;
    }

    .btn-small {
        width: 100%;
        max-width: 200px;
    }

    /* Blog content mobile optimization */
    .why-choose-section, .how-to-section, .use-cases-section {
        width: 95%;
        padding: 1rem 0.5rem;
        margin: 2rem auto;
        text-align: center;
    }

    .advantage-item, .step-item {
        margin-bottom: 1.5rem;
        padding: 1.5rem 1rem;
    }

    .advantage-content, .step-content {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        width: 100%;
        padding: 1rem 0.75rem;
        margin: 0;
    }

    h1 {
        font-size: 1.75rem;
    }

    h2 {
        font-size: 1.4rem;
        padding: 0 0.25rem;
    }

    h3 {
        font-size: 1.2rem;
        padding: 0 0.25rem;
    }

    p {
        font-size: 0.95rem;
        line-height: 1.5;
        padding: 0 0.25rem;
    }

    .drop-area {
        padding: 2.5rem 1rem;
    }

    .drop-area p {
        font-size: 1rem;
        padding: 0;
    }

    /* Enhanced mobile blog content */
    .why-choose-section, .how-to-section, .use-cases-section {
        width: 98%;
        padding: 0.5rem 0.25rem;
        margin: 1rem auto;
        text-align: center;
    }

    .advantage-item, .step-item {
        padding: 1rem 0.75rem;
    }

    .use-cases-content h3 {
        font-size: 1.2rem;
        margin-bottom: 0.75rem;
    }

    .use-cases-content p {
        font-size: 0.95rem;
    }
}