/* ========================================
   BizToolz AI — Modern Affiliate Website
   ======================================== */

/* CSS Variables */
:root {
    /* Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #0ea5e9;
    --accent: #f59e0b;
    
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #d946ef 100%);
    --gradient-hero: linear-gradient(180deg, rgba(99, 102, 241, 0.1) 0%, rgba(255, 255, 255, 0) 100%);
    
    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing */
    --container-max: 1200px;
    --section-padding: 6rem;
    
    /* Borders */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    /* 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);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: #fff;
}

a {
    color: inherit;
    text-decoration: none;
}

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

ul {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-800);
}

.btn-secondary:hover {
    background: var(--gray-200);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--gray-200);
    color: var(--gray-700);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

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

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-100);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 4rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 800;
}

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

.logo-text {
    color: var(--gray-900);
}

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

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

.nav-links a {
    font-weight: 500;
    color: var(--gray-600);
    transition: color var(--transition-fast);
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    transition: all var(--transition-fast);
}

/* Mobile Menu Active State */
.nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    border-top: 1px solid var(--gray-100);
    gap: 1rem;
}

.nav-links.active li {
    width: 100%;
}

.nav-links.active a {
    display: block;
    padding: 0.75rem 0;
}

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

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

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Hero Section */
.hero {
    position: relative;
    padding: 8rem 0 6rem;
    text-align: center;
    overflow: hidden;
    background: var(--gradient-hero);
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gray-600);
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.hero-title {
    max-width: 900px;
    margin: 0 auto 1.5rem;
}

.hero-subtitle {
    max-width: 640px;
    margin: 0 auto 2.5rem;
    font-size: 1.25rem;
    color: var(--gray-600);
}

.hero-cta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

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

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--gray-900);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.hero-gradient {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(to top, white, transparent);
    pointer-events: none;
}

/* Sections */
.section {
    padding: var(--section-padding) 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-badge {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    background: var(--primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.section-title {
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

/* Tools Grid */
.tools-section {
    background: var(--gray-50);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 1.5rem;
}

.tool-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-100);
    transition: all var(--transition-base);
    position: relative;
}

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

.tool-card.featured {
    border: 2px solid var(--primary);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, white 100%);
}

.tool-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.25rem 0.75rem;
    background: var(--gray-100);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--gray-600);
}

.tool-card.featured .tool-badge {
    background: var(--gradient-primary);
    color: white;
}

.tool-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.tool-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 800;
    color: white;
}

.notion-icon { background: #000; }
.jasper-icon { background: linear-gradient(135deg, #ff6b6b, #feca57); }
.chatgpt-icon { background: #10a37f; }
.claude-icon { background: linear-gradient(135deg, #d97706, #f59e0b); }
.otter-icon { background: #3b82f6; }
.copyai-icon { background: linear-gradient(135deg, #8b5cf6, #d946ef); }

.tool-name {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.tool-rating {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.stars {
    color: var(--accent);
    letter-spacing: -2px;
}

.rating-text {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.tool-description {
    color: var(--gray-600);
    margin-bottom: 1.25rem;
    line-height: 1.6;
}

.tool-features {
    margin-bottom: 1.5rem;
}

.tool-features li {
    padding: 0.375rem 0;
    font-size: 0.9375rem;
    color: var(--gray-700);
}

.tool-pricing {
    margin-bottom: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-100);
}

.price {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--gray-900);
}

.price-period {
    font-size: 0.875rem;
    color: var(--gray-500);
}

.tool-cta .btn {
    width: 100%;
}

.tools-cta {
    text-align: center;
    margin-top: 3rem;
}

/* Comparison Section */
.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 1.5rem;
}

.comparison-card {
    display: block;
    background: white;
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-100);
    transition: all var(--transition-base);
}

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

.comparison-vs {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.tool-badge-sm {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 600;
    color: white;
}

.tool-badge-sm.notion { background: #000; }
.tool-badge-sm.chatgpt { background: #10a37f; }
.tool-badge-sm.jasper { background: linear-gradient(135deg, #ff6b6b, #feca57); }
.tool-badge-sm.copyai { background: linear-gradient(135deg, #8b5cf6, #d946ef); }
.tool-badge-sm.claude { background: linear-gradient(135deg, #d97706, #f59e0b); }

.vs {
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--gray-400);
}

.comparison-card h3 {
    margin-bottom: 0.75rem;
}

.comparison-card p {
    color: var(--gray-600);
    margin-bottom: 1rem;
}

.read-more {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.9375rem;
}

/* Guides Section */
.guides-section {
    background: var(--gray-50);
}

.guides-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.guide-card {
    display: block;
    background: white;
    border-radius: var(--radius-xl);
    padding: 1.75rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-100);
    transition: all var(--transition-base);
}

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

.guide-card.featured-guide {
    grid-column: span 2;
    background: var(--gradient-primary);
    color: white;
    border: none;
}

.guide-card.featured-guide h3,
.guide-card.featured-guide p {
    color: white;
}

.guide-card.featured-guide .guide-meta {
    color: rgba(255, 255, 255, 0.8);
}

.guide-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.guide-card h3 {
    margin-bottom: 0.75rem;
}

.guide-card p {
    color: var(--gray-600);
    margin-bottom: 1rem;
    font-size: 0.9375rem;
}

.guide-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.8125rem;
    color: var(--gray-500);
}

/* Newsletter Section */
.newsletter-section {
    background: var(--gray-900);
    color: white;
}

.newsletter-card {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 4rem;
    align-items: center;
}

.newsletter-badge {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.newsletter-content h2 {
    color: white;
    margin-bottom: 1rem;
}

.newsletter-content p {
    color: var(--gray-400);
    margin-bottom: 2rem;
    max-width: 500px;
}

.newsletter-form .form-group {
    display: flex;
    gap: 0.75rem;
}

.newsletter-form input {
    flex: 1;
    min-width: 280px;
    padding: 1rem 1.25rem;
    font-size: 1rem;
    border: 2px solid var(--gray-700);
    border-radius: var(--radius-md);
    background: var(--gray-800);
    color: white;
    transition: border-color var(--transition-fast);
}

.newsletter-form input::placeholder {
    color: var(--gray-500);
}

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

.newsletter-bonus {
    margin-top: 1rem;
    font-size: 0.875rem;
    color: var(--gray-400);
}

.newsletter-bonus span {
    color: var(--accent);
}

.newsletter-features {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.feature {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--gray-300);
}

.feature-icon {
    font-size: 1.25rem;
}

/* Trust Section */
.trust-section {
    padding: 4rem 0;
    border-top: 1px solid var(--gray-100);
}

.trust-content h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.trust-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2rem;
}

.trust-item {
    text-align: center;
}

.trust-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}

.trust-item h3 {
    margin-bottom: 0.5rem;
}

.trust-item p {
    color: var(--gray-600);
    font-size: 0.9375rem;
}

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand p {
    margin: 1rem 0;
    font-size: 0.9375rem;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gray-800);
    border-radius: var(--radius-md);
    font-weight: 700;
    transition: background var(--transition-fast);
}

.social-links a:hover {
    background: var(--primary);
    color: white;
}

.footer-links h4 {
    color: white;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.25rem;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid var(--gray-800);
    text-align: center;
    font-size: 0.875rem;
}

.affiliate-disclosure {
    margin-top: 1rem;
    color: var(--gray-500);
    font-size: 0.8125rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* Responsive */
@media (max-width: 1024px) {
    .newsletter-card {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .newsletter-features {
        flex-direction: row;
        flex-wrap: wrap;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 4rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding: 7rem 0 4rem;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .hero-cta .btn {
        width: 100%;
    }
    
    .hero-stats {
        gap: 2rem;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-grid {
        grid-template-columns: 1fr;
    }
    
    .guides-grid {
        grid-template-columns: 1fr;
    }
    
    .guide-card.featured-guide {
        grid-column: span 1;
    }
    
    .newsletter-form .form-group {
        flex-direction: column;
    }
    
    .newsletter-form input {
        min-width: auto;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .stat-number {
        font-size: 2rem;
    }
    
    .tool-card {
        padding: 1.5rem;
    }
}