/* ToolkitProo - Modern SaaS CSS Framework */
/* ========================================= */

/* CSS Variables - Design System */
:root {
    /* Primary Colors */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    
    /* Secondary Colors */
    --secondary-color: #8b5cf6;
    --secondary-dark: #7c3aed;
    --secondary-light: #a78bfa;
    
    /* Accent Colors */
    --accent-color: #06b6d4;
    --accent-dark: #0891b2;
    --accent-light: #22d3ee;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-card: linear-gradient(145deg, #ffffff 0%, #f8fafc 100%);
    --gradient-dark: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
    
    /* Neutral Colors */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    
    /* Success/Error Colors */
    --success-color: #10b981;
    --success-light: #d1fae5;
    --error-color: #ef4444;
    --error-light: #fee2e2;
    --warning-color: #f59e0b;
    --warning-light: #fef3c7;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --shadow-glow: 0 0 40px -10px var(--primary-color);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* Reset & Base Styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* Container & Layout */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container-narrow {
    max-width: 960px;
}

.container-wide {
    max-width: 1440px;
}

/* Navigation */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.logo img {
    height: 40px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    list-style: none;
}

.nav-links a {
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    color: white;
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

/* Hero Section */
.hero {
    position: relative;
    padding: var(--space-4xl) 0;
    background: var(--gradient-hero);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: white;
    margin-bottom: var(--space-lg);
    line-height: 1.1;
}

.hero p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-xl);
}

.hero-buttons {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.hero .btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

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

/* Section Styles */
.section {
    padding: var(--space-4xl) 0;
}

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto var(--space-3xl);
}

.section-header h2 {
    margin-bottom: var(--space-md);
}

.section-header p {
    font-size: 1.125rem;
}

.section-alt {
    background: var(--bg-secondary);
}

/* Cards */
.card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--border-light);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.card-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-lg);
}

.card-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.card h3 {
    margin-bottom: var(--space-sm);
}

.card p {
    margin-bottom: var(--space-lg);
    color: var(--text-secondary);
}

/* Tool Cards Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.tool-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--border-light);
    text-align: center;
}

.tool-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.tool-card .icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-lg);
}

.tool-card .icon svg {
    width: 40px;
    height: 40px;
    color: white;
}

.tool-card h3 {
    margin-bottom: var(--space-sm);
}

.tool-card p {
    margin-bottom: var(--space-lg);
    color: var(--text-secondary);
}

/* Calculator Tool Page Styles */
.calculator-section {
    padding: var(--space-3xl) 0;
}

.calculator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: start;
}

.calculator-form {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-lg);
}

.calculator-result {
    background: var(--gradient-dark);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    color: white;
    position: sticky;
    top: 100px;
}

.calculator-result h3 {
    color: white;
    margin-bottom: var(--space-lg);
}

.result-value {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-light);
    margin-bottom: var(--space-sm);
}

.result-label {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Form Elements */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: white;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    font-family: var(--font-primary);
}

.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(99, 102, 241, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

/* Blog Styles */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--space-xl);
}

.blog-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--border-light);
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.blog-card-image {
    height: 200px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.blog-card-image svg {
    width: 64px;
    height: 64px;
    color: rgba(255, 255, 255, 0.5);
}

.blog-card-content {
    padding: var(--space-xl);
}

.blog-card .category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--primary-light);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-full);
    margin-bottom: var(--space-sm);
}

.blog-card h3 {
    margin-bottom: var(--space-sm);
    font-size: 1.25rem;
}

.blog-card p {
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
}

.blog-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    font-size: 0.875rem;
    color: var(--text-light);
}

/* Blog Article Page */
.blog-article {
    max-width: 800px;
    margin: 0 auto;
}

.blog-article-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.blog-article-header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--space-lg);
}

.blog-article-image {
    width: 100%;
    height: 400px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
}

.blog-article-image svg {
    width: 120px;
    height: 120px;
    color: rgba(255, 255, 255, 0.3);
}

.blog-article-content h2 {
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-md);
}

.blog-article-content h3 {
    margin-top: var(--space-xl);
    margin-bottom: var(--space-sm);
}

.blog-article-content ul,
.blog-article-content ol {
    margin-bottom: var(--space-lg);
    padding-left: var(--space-xl);
}

.blog-article-content li {
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-xl);
}

.feature-item {
    display: flex;
    gap: var(--space-md);
}

.feature-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.feature-content h3 {
    margin-bottom: var(--space-xs);
    font-size: 1.125rem;
}

.feature-content p {
    margin-bottom: 0;
    font-size: 0.875rem;
}

/* Stats Section */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-xl);
}

.stat-item {
    text-align: center;
    padding: var(--space-xl);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* CTA Section */
.cta-section {
    background: var(--gradient-primary);
    padding: var(--space-4xl) 0;
    text-align: center;
}

.cta-section h2 {
    color: white;
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.25rem;
    margin-bottom: var(--space-xl);
}

.cta-section .btn-secondary {
    background: white;
    color: var(--primary-color);
    border: none;
}

.cta-section .btn-secondary:hover {
    background: var(--bg-secondary);
}

/* Footer */
.footer {
    background: var(--text-primary);
    color: white;
    padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-3xl);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--space-lg);
}

.footer-brand .logo {
    color: white;
    margin-bottom: var(--space-md);
}

.footer h4 {
    color: white;
    margin-bottom: var(--space-lg);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 0;
    font-size: 0.875rem;
}

/* Breadcrumbs */
.breadcrumbs {
    background: var(--bg-secondary);
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--border-color);
}

.breadcrumbs ol {
    display: flex;
    list-style: none;
    gap: var(--space-sm);
    font-size: 0.875rem;
}

.breadcrumbs a {
    color: var(--text-secondary);
}

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

.breadcrumbs li:not(:last-child)::after {
    content: '/';
    margin-left: var(--space-sm);
    color: var(--text-light);
}

.breadcrumbs li:last-child {
    color: var(--text-primary);
    font-weight: 500;
}

/* Tool Content Sections */
.tool-content {
    max-width: 800px;
    margin: 0 auto;
}

.tool-content h2 {
    margin-top: var(--space-3xl);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--border-color);
}

.tool-content h3 {
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
    color: var(--primary-color);
}

.tool-content p {
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.tool-content ul,
.tool-content ol {
    margin-bottom: var(--space-lg);
    padding-left: var(--space-xl);
}

.tool-content li {
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
}

.tool-content strong {
    color: var(--text-primary);
}

/* FAQ Section */
.faq-item {
    background: white;
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: var(--space-lg);
    background: none;
    border: none;
    text-align: left;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-answer {
    padding: 0 var(--space-lg) var(--space-lg);
    color: var(--text-secondary);
}

/* Contact Form */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
}

.contact-info {
    background: var(--gradient-dark);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    color: white;
}

.contact-info h3 {
    color: white;
    margin-bottom: var(--space-lg);
}

.contact-info-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.contact-info-item svg {
    width: 24px;
    height: 24px;
    color: var(--accent-light);
}

.contact-form {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-lg);
}

/* AdSense Placeholder */
.ad-placeholder {
    background: var(--bg-tertiary);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    color: var(--text-light);
    margin: var(--space-xl) 0;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .calculator-container {
        grid-template-columns: 1fr;
    }
    
    .calculator-result {
        position: static;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1.125rem;
    }
    
    .section {
        padding: var(--space-3xl) 0;
    }
    
    .tools-grid,
    .blog-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-md);
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .footer,
    .cta-section,
    .hero-buttons {
        display: none;
    }
    
    .hero {
        background: none;
        color: black;
        padding: var(--space-lg) 0;
    }
    
    .hero h1 {
        color: black;
    }
    
    .hero p {
        color: black;
    }
}

/* Utility Classes */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-sm); }
.mt-2 { margin-top: var(--space-md); }
.mt-3 { margin-top: var(--space-lg); }
.mt-4 { margin-top: var(--space-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-sm); }
.mb-2 { margin-bottom: var(--space-md); }
.mb-3 { margin-bottom: var(--space-lg); }
.mb-4 { margin-bottom: var(--space-xl); }