/* Core Web Vitals Optimized CSS - Lightweight Design */

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

:root {
    --primary: #4A90E2;
    --primary-dark: #357ABD;
    --secondary: #50C878;
    --text-dark: #2C3E50;
    --text-gray: #5A6C7D;
    --bg-light: #F8F9FA;
    --bg-white: #FFFFFF;
    --border-color: #E1E8ED;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.08);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--bg-light);
}

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

/* Header */
.header {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

.logo-icon {
    font-size: 1.75rem;
}

.nav {
    display: flex;
    gap: 1.5rem;
}

.nav a {
    color: var(--text-gray);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #E3F2FD 0%, #F8F9FA 100%);
    padding: 3rem 0;
}

.hero-content {
    text-align: center;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-gray);
    max-width: 900px;
    margin: 0 auto 2rem;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-gray);
}

/* Generator Tool */
.generator-tool {
    background: var(--bg-white);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    margin-top: 2rem;
}

.tool-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 1.5rem;
    text-align: center;
}

.tool-header h2 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.tool-header p {
    opacity: 0.95;
}

.tool-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    padding: 2rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
}

.dynamic-fields {
    max-height: 400px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.tool-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--bg-light);
    color: var(--text-gray);
}

.btn-secondary:hover {
    background: var(--border-color);
}

.btn-success {
    background: var(--secondary);
    color: white;
}

.btn-success:hover {
    background: #45B369;
    transform: translateY(-1px);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

.tool-right {
    display: flex;
    flex-direction: column;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.preview-header h3 {
    font-size: 1.25rem;
    color: var(--text-dark);
}

.validation-status {
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
}

.validation-status.valid {
    background: #D4EDDA;
    color: #155724;
}

.validation-status.invalid {
    background: #F8D7DA;
    color: #721C24;
}

.schema-output {
    flex: 1;
    background: #282C34;
    color: #ABB2BF;
    padding: 1.5rem;
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    overflow: auto;
    max-height: 450px;
    line-height: 1.5;
}

.output-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

/* Content Sections */
section {
    padding: 4rem 0;
}

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

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-gray);
    max-width: 800px;
    margin: 0 auto;
}

/* Intro Section */
.intro-section {
    background: var(--bg-white);
}

.intro-content p {
    font-size: 1.0625rem;
    line-height: 1.8;
    color: var(--text-gray);
    margin-bottom: 1.5rem;
}

.intro-content h2 {
    font-size: 2rem;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
}

/* Grid Layouts */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 2rem;
    transition: all 0.3s;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
    border-color: var(--primary);
}

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

.card h3 {
    font-size: 1.375rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.card p {
    color: var(--text-gray);
    line-height: 1.7;
    margin-bottom: 1.25rem;
}

.card-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}

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

/* Industries Section */
.industries {
    background: var(--bg-white);
}

/* Guide Section */
.guide-steps {
    max-width: 900px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: 2rem;
    margin-bottom: 3rem;
}

.step-number {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
}

.step-content h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.step-content p {
    color: var(--text-gray);
    line-height: 1.8;
}

.guide-tips {
    background: var(--bg-light);
    border-radius: 10px;
    padding: 2rem;
    margin-top: 3rem;
}

.guide-tips h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.tip-card {
    background: var(--bg-white);
    border-radius: 8px;
    padding: 1.5rem;
}

.tip-card h4 {
    font-size: 1.125rem;
    color: var(--text-dark);
    margin-bottom: 0.75rem;
}

.tip-card p {
    color: var(--text-gray);
    line-height: 1.6;
    font-size: 0.9375rem;
}

/* Why 2025 Section */
.why-2025 {
    background: var(--bg-white);
}

.why-content {
    max-width: 900px;
    margin: 0 auto;
}

.why-block {
    margin-bottom: 2.5rem;
}

.why-block h3 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.why-block p {
    color: var(--text-gray);
    line-height: 1.8;
}

.stats-showcase {
    background: linear-gradient(135deg, #E3F2FD 0%, #F8F9FA 100%);
    border-radius: 12px;
    padding: 3rem;
    margin-top: 3rem;
}

.stats-showcase h3 {
    text-align: center;
    font-size: 1.75rem;
    color: var(--text-dark);
    margin-bottom: 2rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.stat-card {
    background: var(--bg-white);
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.stat-big {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.stat-card p {
    color: var(--text-gray);
    font-size: 0.9375rem;
    line-height: 1.5;
}

/* Benefits Section */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.benefit-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 2rem;
    transition: all 0.3s;
}

.benefit-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.benefit-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.benefit-card h3 {
    font-size: 1.375rem;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.benefit-card p {
    color: var(--text-gray);
    line-height: 1.7;
}

/* FAQ Section */
.faq {
    background: var(--bg-white);
}

.faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-light);
    border-radius: 8px;
    margin-bottom: 1rem;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 1.5rem;
    text-align: left;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.2s;
}

.faq-question:hover {
    background: rgba(74, 144, 226, 0.05);
}

.faq-icon {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--primary);
    transition: transform 0.3s;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.faq-item.active .faq-answer {
    max-height: 1000px;
    transition: max-height 0.5s ease-in;
}

.faq-answer p {
    padding: 0 1.5rem 1.5rem;
    color: var(--text-gray);
    line-height: 1.8;
}

/* Final CTA */
.final-cta {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    text-align: center;
    padding: 4rem 0;
}

.cta-content h2 {
    font-size: 2.25rem;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
}

.cta-content .btn {
    background: white;
    color: var(--primary);
}

.cta-content .btn:hover {
    background: var(--bg-light);
    transform: translateY(-2px);
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-col h4 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
}

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

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

.footer-col a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.2s;
}

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

.footer-col p {
    color: rgba(255,255,255,0.7);
    line-height: 1.6;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 1.5rem;
    text-align: center;
    color: rgba(255,255,255,0.6);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .hero h1 {
        font-size: 1.75rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-stats {
        gap: 1.5rem;
    }
    
    .tool-body {
        grid-template-columns: 1fr;
    }
    
    .grid-3 {
        grid-template-columns: 1fr;
    }
    
    .step {
        flex-direction: column;
    }
    
    .tips-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .benefits-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .tool-actions,
    .output-actions {
        flex-direction: column;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Repeatable Fields Styling */
.repeatable-container {
    background: var(--bg-light);
    border-radius: 10px;
    padding: 1.5rem;
    margin-top: 1.5rem;
}

.repeatable-header {
    margin-bottom: 1.5rem;
}

.repeatable-header h4 {
    font-size: 1.25rem;
    color: var(--text-dark);
    margin: 0;
}

.repeatable-items {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.repeatable-item {
    background: var(--bg-white);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    padding: 1.25rem;
    transition: border-color 0.2s;
}

.repeatable-item:hover {
    border-color: var(--primary);
}

.repeatable-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.repeatable-item-header span {
    font-weight: 600;
    color: var(--primary);
    font-size: 1.0625rem;
}

.btn-remove {
    background: #FFF3F3;
    color: #D32F2F;
    border: 1px solid #FFCDD2;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-remove:hover {
    background: #FFEBEE;
    border-color: #EF9A9A;
    transform: translateY(-1px);
}

.repeatable-item-fields {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.btn-add-more {
    width: 100%;
    margin-top: 1rem;
    background: linear-gradient(135deg, #E8F5E9 0%, #F1F8E9 100%);
    color: var(--secondary);
    border: 2px dashed var(--secondary);
    padding: 0.875rem 1.5rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-add-more:hover {
    background: linear-gradient(135deg, #C8E6C9 0%, #DCEDC8 100%);
    border-style: solid;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

@media (max-width: 768px) {
    .repeatable-item-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
    
    .btn-remove {
        width: 100%;
    }
}
/* Dropdown Styles */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropbtn {
    color: var(--text-gray);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
    padding: 0.5rem;
    cursor: pointer;
}

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

.dropdown-content {
    display: none;
    position: absolute;
    background-color: var(--bg-white);
    min-width: 200px;
    box-shadow: var(--shadow-md);
    z-index: 1000;
    left: 0;
    top: 100%;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
}

.dropdown-content a {
    color: var(--text-gray);
    padding: 0.75rem 1rem;
    text-decoration: none;
    display: block;
    font-weight: 500;
    transition: background-color 0.2s, color 0.2s;
    border-bottom: 1px solid var(--border-color);
}

.dropdown-content a:last-child {
    border-bottom: none;
}

.dropdown-content a:hover {
    background-color: var(--bg-light);
    color: var(--primary);
}

.dropdown:hover .dropdown-content {
    display: block;
}

/* Responsive - Hide dropdown on mobile, show hamburger if needed */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
}