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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8fafc;
}

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

/* Header Styles */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
}

.navbar {
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo h1 {
    color: white;
    font-size: 1.8rem;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #e2e8f0;
}

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

.bar {
    width: 25px;
    height: 3px;
    background-color: white;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.6;
}

.cta-button {
    display: inline-block;
    background: white;
    color: #667eea;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.converter-preview {
    display: flex;
    justify-content: center;
    align-items: center;
}

.preview-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

.preview-header {
    text-align: center;
    font-weight: 600;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.preview-content {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.preview-input,
.preview-output {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.8rem 1.2rem;
    border-radius: 10px;
    font-weight: 600;
    min-width: 100px;
    text-align: center;
}

.preview-arrow {
    font-size: 1.5rem;
    font-weight: bold;
}

/* Converter Section */
.converter-section {
    padding: 80px 0;
    background: white;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    color: #2d3748;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.1rem;
    color: #718096;
    max-width: 600px;
    margin: 0 auto;
}

.converter-card {
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    padding: 2.5rem;
    margin-bottom: 3rem;
    border: 1px solid #e2e8f0;
}

.converter-header {
    margin-bottom: 2rem;
}

.category-selector {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.category-selector label {
    font-weight: 600;
    color: #2d3748;
    font-size: 1.1rem;
}

.category-select {
    padding: 0.8rem 1.2rem;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    background: white;
    cursor: pointer;
    transition: border-color 0.3s ease;
    min-width: 200px;
}

.category-select:focus {
    outline: none;
    border-color: #667eea;
}

.conversion-row {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 2rem;
    align-items: end;
}

.input-group,
.output-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group label,
.output-group label {
    font-weight: 600;
    color: #2d3748;
    font-size: 1rem;
}

.input-container,
.output-container {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

#input-value {
    flex: 1;
    padding: 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1.1rem;
    transition: border-color 0.3s ease;
}

#input-value:focus {
    outline: none;
    border-color: #667eea;
}

.unit-select {
    padding: 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    background: white;
    cursor: pointer;
    transition: border-color 0.3s ease;
    min-width: 150px;
}

.unit-select:focus {
    outline: none;
    border-color: #667eea;
}

.result-display {
    flex: 1;
    padding: 1rem;
    background: #f7fafc;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    color: #2d3748;
    min-height: 54px;
    display: flex;
    align-items: center;
}

.swap-container {
    display: flex;
    justify-content: center;
    align-items: center;
}

.swap-button {
    background: #667eea;
    color: white;
    border: none;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.swap-button:hover {
    background: #5a67d8;
    transform: rotate(180deg);
}

.copy-button {
    background: #48bb78;
    color: white;
    border: none;
    border-radius: 8px;
    padding: 0.8rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.copy-button:hover {
    background: #38a169;
}

.copy-button.copied {
    background: #38a169;
}

/* Quick Examples */
.quick-examples {
    margin-top: 3rem;
}

.quick-examples h3 {
    text-align: center;
    font-size: 1.8rem;
    color: #2d3748;
    margin-bottom: 2rem;
}

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

.example-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1.5rem;
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.example-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.example-title {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.example-conversion {
    font-size: 1rem;
    opacity: 0.9;
}

/* Content Section */
.content-section {
    padding: 80px 0;
    background: #f7fafc;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.content-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
}

.content-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.content-card h3 {
    color: #2d3748;
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.content-card p {
    color: #718096;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.read-more {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.read-more:hover {
    color: #5a67d8;
}

/* Tools Section */
.tools-section {
    padding: 80px 0;
    background: white;
}

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

.tool-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #e2e8f0;
    position: relative;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.tool-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.tool-card h3 {
    color: #2d3748;
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.tool-card p {
    color: #718096;
    margin-bottom: 1rem;
}

.coming-soon {
    background: #fed7d7;
    color: #c53030;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* Footer */
.footer {
    background: #2d3748;
    color: white;
    padding: 3rem 0 1rem;
}

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

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: #e2e8f0;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #a0aec0;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

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

.social-link {
    color: #a0aec0;
    text-decoration: none;
    transition: color 0.3s ease;
}

.social-link:hover {
    color: #667eea;
}

.footer-bottom {
    border-top: 1px solid #4a5568;
    padding-top: 1rem;
    text-align: center;
    color: #a0aec0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: #667eea;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

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

    .nav-menu li {
        margin: 1rem 0;
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

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

    .swap-container {
        order: 3;
    }

    .swap-button {
        transform: rotate(90deg);
    }

    .swap-button:hover {
        transform: rotate(270deg);
    }

    .input-container,
    .output-container {
        flex-direction: column;
        gap: 0.8rem;
    }

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

    .content-grid {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .converter-card {
        padding: 1.5rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }
}

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

.converter-card,
.content-card,
.tool-card {
    animation: fadeInUp 0.6s ease-out;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

/* Tool Link Styles */
.tool-link {
    display: inline-block;
    background: #667eea;
    color: white;
    padding: 0.6rem 1.2rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    margin-top: 0.5rem;
}

.tool-link:hover {
    background: #5a67d8;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* Page-specific styles */
.page-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 60px;
    text-align: center;
}

.page-hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.page-hero p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
}

.tool-section {
    padding: 60px 0;
    background: white;
}

.examples-section,
.faq-section,
.article-section {
    padding: 60px 0;
}

.examples-section {
    background: #f7fafc;
}

.faq-section {
    background: white;
}

.article-section {
    background: #f7fafc;
}

.faq-item {
    background: white;
    border-radius: 10px;
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    border: 1px solid #e2e8f0;
}

.faq-question {
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.faq-answer {
    color: #718096;
    line-height: 1.6;
}

.example-item {
    background: white;
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #e2e8f0;
}

.example-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1rem;
}

.example-steps {
    list-style: none;
    counter-reset: step-counter;
}

.example-steps li {
    counter-increment: step-counter;
    margin-bottom: 1rem;
    padding-left: 3rem;
    position: relative;
    line-height: 1.6;
}

.example-steps li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    background: #667eea;
    color: white;
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.9rem;
}

.article-content {
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.article-content h3 {
    color: #2d3748;
    font-size: 1.5rem;
    margin: 2rem 0 1rem;
}

.article-content p {
    margin-bottom: 1.5rem;
    color: #4a5568;
}

/* Calculator specific styles */
.calculator-card {
    background: white;
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    padding: 2.5rem;
    margin-bottom: 3rem;
    border: 1px solid #e2e8f0;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

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

.input-group label {
    font-weight: 600;
    color: #2d3748;
    font-size: 1rem;
}

.input-group input,
.input-group select {
    padding: 1rem;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.input-group input:focus,
.input-group select:focus {
    outline: none;
    border-color: #667eea;
}

.calculate-button {
    width: 100%;
    background: #667eea;
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 1.5rem;
}

.calculate-button:hover {
    background: #5a67d8;
    transform: translateY(-2px);
}

.result-display {
    background: #f7fafc;
    border: 2px solid #e2e8f0;
    border-radius: 10px;
    padding: 1.5rem;
    text-align: center;
    font-size: 1.2rem;
    font-weight: 600;
    color: #2d3748;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.result-highlight {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: #667eea;
}

@media (max-width: 768px) {
    .input-row {
        grid-template-columns: 1fr;
    }
    
    .page-hero h1 {
        font-size: 2.5rem;
    }
    
    .calculator-card {
        padding: 1.5rem;
    }
}

/* Features Section Styles */
.features-section {
    padding: 80px 0;
    background: #f7fafc;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #e2e8f0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.feature-card h3 {
    color: #2d3748;
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.feature-card p {
    color: #718096;
    line-height: 1.6;
    font-size: 1rem;
}

/* Active navigation link */
.nav-link.active {
    color: #fff;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    padding: 0.5rem 1rem;
}

/* Responsive adjustments for new pages */
@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .feature-card {
        padding: 1.5rem;
    }
    
    .feature-icon {
        font-size: 2.5rem;
    }
}