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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f5f6f7;
    color: #2c3e50;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
header {
    position: sticky;
    top: 0;
    background: white;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: box-shadow 0.3s ease;
}

header.scrolled {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 64px;
    max-width: 1200px;
    margin: 0 auto;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    height: 44px;
    /* Default height */
    max-width: 180px;
    /* Base width */
    overflow: visible;
    transition: transform 0.2s ease;
    flex-shrink: 0;
}

.logo:hover {
    transform: scale(1.02);
}

.logo img {
    height: 100%;
    width: auto;
    max-width: 100%;
    display: block;
    object-fit: contain;
    /* Retina/High DPI optimization */
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

/* Main Navigation */
.nav-main {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    justify-content: center;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 16px;
    color: #64748b;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.2s ease;
    font-weight: 500;
    white-space: nowrap;
}

.nav-link:hover {
    color: #2563eb;
    background-color: #f1f5f9;
}

.nav-link.has-dropdown::after {
    content: '▼';
    font-size: 10px;
    margin-left: 4px;
    transition: transform 0.2s ease;
}

.nav-item:hover .nav-link.has-dropdown::after {
    transform: rotate(180deg);
}

/* Dropdown Styles */
.dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1001;
    min-width: 200px;
}

.nav-item:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(8px);
}

/* Convert PDF Dropdown - Two Column */
.dropdown.convert-dropdown {
    width: 400px;
    padding: 20px;
}

.dropdown-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.dropdown-column h3 {
    font-size: 14px;
    font-weight: 600;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.dropdown-link {
    display: block;
    padding: 8px 12px;
    color: #475569;
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s ease;
    font-size: 14px;
}

.dropdown-link:hover {
    color: #2563eb;
    background-color: #f1f5f9;
}

/* All PDF Tools Mega Menu */
.dropdown.mega-dropdown {
    width: 800px;
    padding: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
}

.nav-item:hover .dropdown.mega-dropdown {
    transform: translateX(-50%) translateY(8px);
}

.mega-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

.mega-column h3 {
    font-size: 13px;
    font-weight: 600;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.mega-column .dropdown-link {
    font-size: 13px;
    padding: 6px 8px;
}

/* Auth Buttons */
.auth-buttons {
    display: flex;
    align-items: center;
    gap: 12px;
}

.btn {
    padding: 8px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
    font-size: 14px;
}

.btn-secondary {
    color: #64748b;
    background: transparent;
}

.btn-secondary:hover {
    color: #2563eb;
    background-color: #f1f5f9;
}

.btn-primary {
    color: white;
    background: #2563eb;
}

.btn-primary:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: background-color 0.2s ease;
}

.mobile-menu-btn:hover {
    background-color: #f1f5f9;
}

.hamburger {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 24px;
}

.hamburger span {
    width: 100%;
    height: 2px;
    background: #64748b;
    transition: all 0.3s ease;
}

.mobile-menu-btn.active .hamburger span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active .hamburger span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active .hamburger span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Responsive */
@media (max-width: 1023px) {
    nav {
        padding: 0 16px;
    }

    .nav-main {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: 20px;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        max-height: calc(100vh - 64px);
        overflow-y: auto;
    }

    .nav-main.is-open {
        transform: translateX(0);
    }

    .nav-item {
        width: 100%;
    }

    .nav-link {
        width: 100%;
        padding: 12px 16px;
        justify-content: space-between;
    }

    .dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: #f8f9fa;
        margin: 8px 0 16px 0;
        display: none;
    }

    .dropdown.is-open {
        display: block;
    }

    .dropdown.convert-dropdown,
    .dropdown.mega-dropdown {
        width: 100%;
        padding: 16px;
        transform: none;
    }

    .nav-item:hover .dropdown.mega-dropdown {
        transform: none;
    }

    .mega-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .dropdown-columns {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .mobile-menu-btn {
        display: block;
    }

    .auth-buttons {
        display: none;
    }
}

@media (max-width: 640px) {
    nav {
        padding: 0 12px;
    }

    .logo {
        height: 38px;
        /* Slightly smaller on tablet/mobile */
        max-width: 150px;
    }
}

/* Hero Section */
.hero {
    background: white;
    padding: 20px 0;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    color: #1e293b;
}

.hero p {
    font-size: 18px;
    color: #64748b;
    max-width: 600px;
    margin: 0 auto 40px;
}

/* Category Tabs */
.category-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tab {
    padding: 10px 20px;
    background: #f1f5f9;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 500;
    color: #64748b;
    transition: all 0.3s;
}

.tab.active,
.tab:hover {
    background: #2563eb;
    color: white;
}

/* Tools Grid */
.tools-section {
    padding: 40px 0;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    justify-items: center;
}

.tool-card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all 0.3s;
    cursor: pointer;
    position: relative;
    min-width: 250px;
    max-width: 300px;
    text-decoration: none;
    color: inherit;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.tool-icon {
    width: 60px;
    height: 60px;
    background: #e0e7ff;
    border-radius: 12px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: #2563eb;
}

.tool-card h3 {
    margin-bottom: 10px;
    color: #1e293b;
}

.tool-card p {
    color: #64748b;
    font-size: 14px;
}

.badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: #ef4444;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: bold;
}

/* Why Choose PDFlyst Section */
.why-choose {
    padding: 80px 0;
    background: #f8fafc;
}

.why-choose .features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.why-choose .feature-card {
    background: white;
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.why-choose .feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.why-choose .feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
    display: block;
}

.why-choose .feature-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #1e293b;
}

.why-choose .feature-card p {
    color: #64748b;
    line-height: 1.6;
    font-size: 16px;
}




/* Work Your Way Section */
.work-way {
    background: white;
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #1e293b;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.feature-card {
    text-align: center;
}

.feature-image {
    width: 100%;
    height: 200px;
    background: #e0e7ff;
    border-radius: 12px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #2563eb;
    font-size: 18px;
}

.feature-card h3 {
    margin-bottom: 15px;
    color: #1e293b;
}

.feature-card p {
    color: #64748b;
}

/* Premium Section */
.premium {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 80px 0;
    color: white;
}

.premium-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.premium h2 {
    font-size: 36px;
    margin-bottom: 30px;
}

.premium-features {
    list-style: none;
    margin-bottom: 30px;
}

.premium-features li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.premium-features li::before {
    content: "✓";
    background: white;
    color: #667eea;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    font-weight: bold;
}

.btn-premium {
    background: white;
    color: #667eea;
    padding: 15px 30px;
    font-size: 16px;
}

.btn-premium:hover {
    background: #f1f5f9;
}

.premium-image {
    width: 100%;
    height: 300px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
}

/* Image Editing Section */
.image-editing {
    background: white;
    padding: 80px 0;
}

.image-editing-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.image-mockup {
    width: 100%;
    height: 400px;
    background: #e0e7ff;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #2563eb;
    font-size: 18px;
}

.image-editing-text h2 {
    font-size: 36px;
    margin-bottom: 20px;
    color: #1e293b;
}

.image-editing-text p {
    color: #64748b;
    margin-bottom: 30px;
    font-size: 16px;
}

/* Trust Section */
.trust {
    background: white;
    padding: 60px 0;
    text-align: center;
}

.trust h2 {
    font-size: 32px;
    margin-bottom: 20px;
    color: #1e293b;
}

.trust p {
    color: #64748b;
    max-width: 600px;
    margin: 0 auto 40px;
}

.trust-badges {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.trust-badge {
    width: 80px;
    height: 80px;
    background: #f1f5f9;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #2563eb;
    font-weight: bold;
    font-size: 12px;
    text-align: center;
}

/* Footer */
footer {
    background: #1e293b;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    margin-bottom: 20px;
    color: white;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #94a3b8;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.app-buttons {
    display: flex;
    gap: 15px;
}

.app-btn {
    background: #334155;
    color: white;
    padding: 10px 20px;
    border-radius: 6px;
    text-decoration: none;
    transition: background 0.3s;
}

.app-btn:hover {
    background: #475569;
}

.language-selector {
    background: #334155;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 6px;
    cursor: pointer;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 32px;
    }

    .hero p {
        font-size: 1rem;
    }

    .hero .btn {
        padding: 10px 20px;
        font-size: 1rem;
    }

    .premium-content,
    .image-editing-content {
        grid-template-columns: 1fr;
    }

    .tools-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .footer-bottom {
        flex-direction: column;
        gap: 20px;
    }
}

/* Tablet and Small Mobile */
@media (max-width: 640px) {
    .hero h1 {
        font-size: 30px;
    }

    .hero p {
        font-size: 0.95rem;
    }
}


/* Extra Small Mobile */
@media (max-width: 480px) {
    .hero h1 {
        font-size: 28px;
    }

    .hero p {
        font-size: 0.9rem;
    }
}

/* Main Body Styles for Sign PDF Page */
.main-body .hero p {
    margin-bottom: 12px;
}

/* Responsive Design */
@media (max-width: 768px) {

    /* Tighter hero-to-tool gap on Sign PDF mobile */
    .main-body .hero {
        padding-bottom: 8px;
    }

    .main-body .hero p {
        margin-bottom: 6px;
    }

    .main-body .sign-pdf-section {
        padding-top: 6px;
    }
}

/* FAQ Section */
.faq-section {
    padding: 70px 0;
    background: #ffffff;
}

.faq-section .section-title {
    margin-bottom: 40px;
}

.faq-list {
    max-width: 780px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.faq-item {
    padding-bottom: 18px;
    border-bottom: 1px solid #e2e8f0;
}

.faq-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.faq-item h3 {
    font-size: 20px;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 6px;
}

.faq-item p {
    font-size: 15px;
    color: #64748b;
    line-height: 1.7;
}

/* Tool Features Section */
.tool-features {
    padding: 60px 0;
    background: #f8fafc;
}

.tool-features .section-title {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: #1e293b;
}

.tool-features .features-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
}

.tool-features .features-content h3 {
    font-size: 24px;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 15px;
    margin-top: 30px;
}

.tool-features .features-content h3:first-child {
    margin-top: 0;
}

.tool-features .features-content p {
    font-size: 16px;
    line-height: 1.7;
    color: #64748b;
    margin-bottom: 20px;
}