/* ==========================================
   Agentappbuilder - Styles
   Minimalist, OpenAI-inspired design
   ========================================== */

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

:root {
    --color-black: #000000;
    --color-white: #ffffff;
    --color-gray-50: #fafafa;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #e5e5e5;
    --color-gray-300: #d4d4d4;
    --color-gray-400: #a3a3a3;
    --color-gray-500: #737373;
    --color-gray-600: #525252;
    --color-gray-700: #404040;
    --color-gray-800: #262626;
    --color-gray-900: #171717;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --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;
    --space-5xl: 8rem;
    
    --container-max: 1200px;
    --container-narrow: 800px;
}

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

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-gray-900);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
}

h3 {
    font-size: 1.25rem;
}

p {
    color: var(--color-gray-600);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-family);
    font-size: 0.9375rem;
    font-weight: 500;
    line-height: 1;
    border: 1px solid transparent;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

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

.btn-primary:hover {
    background-color: var(--color-gray-800);
    border-color: var(--color-gray-800);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-gray-900);
    border-color: var(--color-gray-300);
}

.btn-secondary:hover {
    background-color: var(--color-gray-50);
    border-color: var(--color-gray-400);
}

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

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-200);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: var(--space-md) var(--space-lg);
}

.nav-logo {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: var(--space-xl);
}

.nav-links a {
    font-size: 0.9375rem;
    color: var(--color-gray-600);
    transition: color 0.15s ease;
}

.nav-links a:hover {
    color: var(--color-gray-900);
}

.nav-cta {
    display: flex;
    gap: var(--space-sm);
}

.nav-mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-mobile-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background-color: var(--color-gray-900);
}

/* Decorative Images */
.deco {
    position: absolute;
    pointer-events: none;
    opacity: 0.6;
    z-index: 0;
}

.deco-1 {
    top: 10%;
    right: 5%;
    width: 180px;
    transform: rotate(12deg);
}

.deco-2 {
    bottom: 15%;
    left: 3%;
    width: 120px;
    transform: rotate(-8deg);
}

.deco-3 {
    top: 5%;
    left: 2%;
    width: 100px;
    opacity: 0.4;
}

.deco-4 {
    bottom: 10%;
    right: 5%;
    width: 200px;
    opacity: 0.3;
}

.deco-5 {
    top: 50%;
    right: -5%;
    width: 300px;
    transform: translateY(-50%) rotate(5deg);
    opacity: 0.25;
}

.deco-6 {
    top: 10%;
    right: 8%;
    width: 120px;
    opacity: 0.35;
    transform: rotate(-5deg);
}

.deco-7 {
    bottom: 20%;
    left: 5%;
    width: 180px;
    opacity: 0.2;
}

.deco-8 {
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 600px;
    opacity: 0.15;
}

/* Hero Section */
.hero {
    position: relative;
    padding: calc(var(--space-5xl) + 60px) 0 var(--space-5xl);
    text-align: center;
    overflow: hidden;
}

.hero-decoration {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-badge {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    margin-bottom: var(--space-lg);
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-gray-600);
    background-color: var(--color-gray-100);
    border-radius: 100px;
}

.hero-title {
    max-width: 900px;
    margin: 0 auto var(--space-lg);
    color: var(--color-gray-900);
}

.hero-subtitle {
    max-width: 640px;
    margin: 0 auto var(--space-2xl);
    font-size: 1.125rem;
    color: var(--color-gray-500);
}

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

/* Integrations */
.integrations {
    padding: var(--space-3xl) 0;
    background-color: var(--color-gray-50);
    border-top: 1px solid var(--color-gray-200);
    border-bottom: 1px solid var(--color-gray-200);
}

.integrations-label {
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin-bottom: var(--space-xl);
}

.integrations-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--space-3xl);
    flex-wrap: wrap;
}

.integration-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-gray-700);
}

.integration-logo {
    width: 24px;
    height: 24px;
}

.integration-coming {
    flex-direction: column;
    gap: var(--space-xs);
}

.coming-badge {
    font-size: 0.6875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-400);
}

/* Problem Section */
.problem {
    padding: var(--space-5xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--space-3xl);
    color: var(--color-gray-900);
}

.section-subtitle {
    text-align: center;
    max-width: 600px;
    margin: calc(var(--space-lg) * -1) auto var(--space-3xl);
    font-size: 1.125rem;
    color: var(--color-gray-500);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.problem-card {
    padding: var(--space-xl);
    background-color: var(--color-gray-50);
    border: 1px solid var(--color-gray-200);
    border-radius: 12px;
}

.problem-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-lg);
    background-color: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: 10px;
    color: var(--color-gray-700);
}

.problem-card h3 {
    margin-bottom: var(--space-sm);
    color: var(--color-gray-900);
}

.problem-card p {
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* Solution Section */
.solution {
    position: relative;
    padding: var(--space-5xl) 0;
    background-color: var(--color-gray-900);
    color: var(--color-white);
    overflow: hidden;
}

.solution-decoration {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.solution .section-title {
    color: var(--color-white);
}

.solution .section-subtitle {
    color: var(--color-gray-400);
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    position: relative;
    z-index: 1;
}

.solution-card {
    padding: var(--space-xl);
    border: 1px solid var(--color-gray-700);
    border-radius: 12px;
}

.solution-number {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-500);
    margin-bottom: var(--space-md);
}

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

.solution-card p {
    font-size: 0.9375rem;
    color: var(--color-gray-400);
    line-height: 1.6;
}

/* Features Section */
.features {
    padding: var(--space-5xl) 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

.feature-card {
    padding: var(--space-xl);
    border: 1px solid var(--color-gray-200);
    border-radius: 12px;
    transition: border-color 0.15s ease;
}

.feature-card:hover {
    border-color: var(--color-gray-400);
}

.feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    margin-bottom: var(--space-lg);
    background-color: var(--color-gray-100);
    border-radius: 10px;
    color: var(--color-gray-700);
}

.feature-card h3 {
    margin-bottom: var(--space-sm);
    color: var(--color-gray-900);
}

.feature-card p {
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* How it Works */
.how-it-works {
    position: relative;
    padding: var(--space-5xl) 0;
    background-color: var(--color-gray-50);
    overflow: hidden;
}

.how-decoration {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.steps {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.step {
    display: flex;
    gap: var(--space-xl);
    padding: var(--space-xl) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.step:last-child {
    border-bottom: none;
}

.step-number {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-white);
    background-color: var(--color-gray-900);
    border-radius: 50%;
}

.step-content h3 {
    margin-bottom: var(--space-xs);
    color: var(--color-gray-900);
}

.step-content p {
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* Use Cases */
.use-cases {
    padding: var(--space-5xl) 0;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.use-case-card {
    padding: var(--space-xl);
    background-color: var(--color-gray-50);
    border: 1px solid var(--color-gray-200);
    border-radius: 12px;
    transition: border-color 0.15s ease;
}

.use-case-card:hover {
    border-color: var(--color-gray-400);
}

.use-case-icon {
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
}

.use-case-card h3 {
    font-size: 1rem;
    margin-bottom: var(--space-sm);
    color: var(--color-gray-900);
}

.use-case-card p {
    font-size: 0.875rem;
    line-height: 1.6;
}

/* FAQ */
.faq {
    position: relative;
    padding: var(--space-5xl) 0;
    background-color: var(--color-gray-50);
    overflow: hidden;
}

.faq-decoration {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.faq-list {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.faq-item {
    border-bottom: 1px solid var(--color-gray-200);
}

.faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-lg) 0;
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-gray-900);
    cursor: pointer;
    list-style: none;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.25rem;
    font-weight: 400;
    color: var(--color-gray-400);
    transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-item p {
    padding-bottom: var(--space-lg);
    font-size: 0.9375rem;
    line-height: 1.7;
}

/* CTA Section */
.cta {
    position: relative;
    padding: var(--space-5xl) 0;
    text-align: center;
    overflow: hidden;
}

.cta-decoration {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.cta-title {
    margin-bottom: var(--space-md);
    color: var(--color-gray-900);
}

.cta-subtitle {
    margin-bottom: var(--space-xl);
    font-size: 1.125rem;
    color: var(--color-gray-500);
}

/* Footer */
.footer {
    padding: var(--space-3xl) 0 var(--space-xl);
    border-top: 1px solid var(--color-gray-200);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-2xl);
}

.footer-brand {
    max-width: 280px;
}

.footer-logo {
    display: block;
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--color-gray-900);
}

.footer-brand p {
    font-size: 0.875rem;
}

.footer-links {
    display: flex;
    gap: var(--space-xl);
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    transition: color 0.15s ease;
}

.footer-links a:hover {
    color: var(--color-gray-900);
}

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-gray-200);
}

.footer-bottom p {
    font-size: 0.8125rem;
    color: var(--color-gray-400);
}

/* Responsive */
@media (max-width: 1024px) {
    .problem-grid,
    .solution-grid,
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .use-cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .deco {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav-links,
    .nav-cta {
        display: none;
    }
    
    .nav-mobile-toggle {
        display: flex;
    }
    
    .hero {
        padding: calc(var(--space-4xl) + 60px) 0 var(--space-4xl);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .integrations-logos {
        flex-direction: column;
        gap: var(--space-lg);
    }
    
    .problem-grid,
    .solution-grid,
    .features-grid,
    .use-cases-grid {
        grid-template-columns: 1fr;
    }
    
    .step {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-xl);
    }
    
    .footer-links {
        flex-direction: column;
        gap: var(--space-md);
    }
}

/* Print styles */
@media print {
    .nav,
    .deco,
    .btn {
        display: none;
    }
    
    body {
        font-size: 12pt;
    }
}