/* CSS Reset and Variables */
:root {
    /* Colors */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-accent: #f1f5f9;
    --border-color: #e2e8f0;
    --shadow-light: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-large: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    
    /* Typography */
    --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-mono: 'Fira Code', 'Monaco', 'Consolas', monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Layout */
    --max-width-sm: 640px;
    --max-width-md: 768px;
    --max-width-lg: 1024px;
    --max-width-xl: 1280px;
    --max-width-2xl: 1536px;
    --border-radius-sm: 0.25rem;
    --border-radius-md: 0.375rem;
    --border-radius-lg: 0.5rem;
    --border-radius-xl: 0.75rem;
    --border-radius-2xl: 1rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-4xl);
}

h2 {
    font-size: var(--font-size-3xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

h4 {
    font-size: var(--font-size-xl);
}

p {
    margin-bottom: var(--spacing-md);
    line-height: var(--line-height-relaxed);
}

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

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

/* Layout */
.container {
    max-width: var(--max-width-xl);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section__header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section__title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.section__description {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    max-width: 600px;
    margin: 0 auto;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    border: none;
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    transition: var(--transition-normal);
    white-space: nowrap;
}

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

.btn--primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-large);
}

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

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition-normal);
}

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

.nav__brand {
    display: flex;
    align-items: center;
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--primary-color);
}

.nav__title {
    color: var(--text-primary);
}

.nav__toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.nav__menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
}

.nav__link {
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    transition: var(--transition-fast);
}

.nav__link:hover {
    color: var(--primary-color);
    background-color: var(--bg-accent);
}

/* Hero Section */
.hero {
    padding: calc(80px + var(--spacing-4xl)) 0 var(--spacing-4xl);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero__container {
    max-width: var(--max-width-xl);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero__content {
    max-width: 600px;
}

.hero__title {
    font-size: var(--font-size-5xl);
    margin-bottom: var(--spacing-lg);
    line-height: var(--line-height-tight);
}

.hero__subtitle {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-2xl);
    opacity: 0.9;
    line-height: var(--line-height-relaxed);
}

.hero__actions {
    display: flex;
    gap: var(--spacing-lg);
}

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

.hero__image-container {
    position: relative;
    border-radius: var(--border-radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-large);
    transform: perspective(1000px) rotateY(-15deg);
    transition: var(--transition-slow);
}

.hero__image-container:hover {
    transform: perspective(1000px) rotateY(0deg);
}

.hero__image {
    width: 100%;
    height: auto;
    display: block;
}

/* Features Section */
.features {
    padding: var(--spacing-4xl) 0;
    background-color: var(--bg-secondary);
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-light);
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-large);
}

.feature-card__icon {
    margin-bottom: var(--spacing-lg);
}

.feature-card__title {
    color: var(--text-primary);
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
}

.feature-card__description {
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
}

/* Technology Section */
.technology {
    padding: var(--spacing-4xl) 0;
    background-color: var(--bg-primary);
}

.technology__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.tech-card {
    background: var(--bg-accent);
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-xl);
    border-left: 4px solid var(--primary-color);
    transition: var(--transition-normal);
}

.tech-card:hover {
    background: white;
    box-shadow: var(--shadow-medium);
}

.tech-card__title {
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.tech-card__description {
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
}

/* Demo Section */
.demo {
    padding: var(--spacing-4xl) 0;
    background-color: var(--bg-secondary);
}

.demo__instructions {
    margin-bottom: var(--spacing-2xl);
    text-align: center;
}

.demo__instructions-title {
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.demo__steps {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

.demo__step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 200px;
}

.demo__step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-sm);
}

.demo__step-text {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.demo__iframe-container {
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-large);
    background: white;
}

.demo__iframe-container iframe {
    width: 100%;
    height: 600px;
    border: none;
}

/* Use Cases Section */
.use-cases {
    padding: var(--spacing-4xl) 0;
    background-color: var(--bg-primary);
}

.use-cases__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.use-case-card {
    background: white;
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
}

.use-case-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-large);
}

.use-case-card__image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.use-case-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.use-case-card:hover .use-case-card__image img {
    transform: scale(1.05);
}

.use-case-card__title {
    color: var(--text-primary);
    font-size: var(--font-size-xl);
    margin: var(--spacing-lg) var(--spacing-lg) var(--spacing-md);
}

.use-case-card__description {
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
    margin: 0 var(--spacing-lg) var(--spacing-lg);
}

/* Resources Section */
.resources {
    padding: var(--spacing-4xl) 0;
    background-color: var(--bg-secondary);
}

.resources__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.resource-card {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-light);
    transition: var(--transition-normal);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.resource-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-large);
}

.resource-card__icon {
    margin-bottom: var(--spacing-md);
}

.resource-card__title {
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
}

.resource-card__description {
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
    margin-bottom: var(--spacing-lg);
    flex-grow: 1;
}

.resource-card__link {
    color: var(--primary-color);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: var(--transition-fast);
}

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

/* Footer */
.footer {
    background-color: var(--text-primary);
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

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

.footer__brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer__title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
}

.footer__description {
    color: var(--text-light);
    line-height: var(--line-height-relaxed);
    max-width: 400px;
}

.footer__links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-xl);
}

.footer__section-title {
    color: white;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-md);
}

.footer__list {
    list-style: none;
}

.footer__list li {
    margin-bottom: var(--spacing-sm);
}

.footer__link {
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer__link:hover {
    color: white;
}

.footer__bottom {
    border-top: 1px solid var(--secondary-color);
    padding-top: var(--spacing-xl);
    text-align: center;
}

.footer__copyright {
    color: var(--text-light);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-relaxed);
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero__title {
        font-size: var(--font-size-3xl);
    }
    
    .hero__subtitle {
        font-size: var(--font-size-lg);
    }
    
    .hero__actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero__image-container {
        transform: none;
        max-width: 400px;
    }
    
    .nav__toggle {
        display: block;
    }
    
    .nav__menu {
        display: none;
    }
    
    .features__grid,
    .technology__grid,
    .use-cases__grid,
    .resources__grid {
        grid-template-columns: 1fr;
    }
    
    .demo__steps {
        flex-direction: column;
        align-items: center;
    }
    
    .footer__content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer__links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero {
        padding: calc(80px + var(--spacing-2xl)) 0 var(--spacing-2xl);
    }
    
    .hero__title {
        font-size: var(--font-size-2xl);
    }
    
    .section__header {
        margin-bottom: var(--spacing-2xl);
    }
    
    .features,
    .technology,
    .demo,
    .use-cases,
    .resources {
        padding: var(--spacing-2xl) 0;
    }
    
    .feature-card,
    .tech-card,
    .resource-card {
        padding: var(--spacing-lg);
    }
    
    .footer__links {
        grid-template-columns: 1fr;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 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;
}

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

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

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

.mb-0 {
    margin-bottom: 0;
}

.mt-0 {
    margin-top: 0;
}

.p-0 {
    padding: 0;
}

.w-full {
    width: 100%;
}

.h-full {
    height: 100%;
}