/* ========================================
   CSS Variables & Reset
   ======================================== */
:root {
    --bg-dark: #0a0a0f;
    --bg-darker: #050508;
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-tertiary: #ec4899;
    --border-color: rgba(255, 255, 255, 0.1);
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-hover: rgba(255, 255, 255, 0.06);
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    --border-radius: 12px;
    --border-radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   Background Effects
   ======================================== */
.bg-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: radial-gradient(ellipse at 50% 0%, rgba(99, 102, 241, 0.15), transparent 50%),
                radial-gradient(ellipse at 80% 50%, rgba(139, 92, 246, 0.1), transparent 50%),
                radial-gradient(ellipse at 20% 80%, rgba(236, 72, 153, 0.1), transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 50px 50px;
    pointer-events: none;
    z-index: 0;
}

/* ========================================
   Container & Layout
   ======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ========================================
   Navigation
   ======================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 2rem;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-5px); }
}

.logo-text {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-login {
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.nav-login:hover {
    background: rgba(99, 102, 241, 0.2);
    border-color: rgba(99, 102, 241, 0.5);
    transform: translateY(-2px);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    z-index: 1;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    padding-top: var(--spacing-3xl);
}

.badge {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease-out;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    animation: fadeInUp 0.6s ease-out 0.1s backwards;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary), var(--accent-tertiary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: gradient 5s ease infinite;
}

@keyframes gradient {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-description {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
    animation: fadeInUp 0.6s ease-out 0.2s backwards;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease-out 0.3s backwards;
}

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

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    font-size: 1.125rem;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(99, 102, 241, 0.4);
}

.btn-primary svg {
    transition: var(--transition);
}

.btn-primary:hover svg {
    transform: translateX(5px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
}

.btn-large {
    padding: 1.25rem 2.5rem;
    font-size: 1.25rem;
}

/* ========================================
   Platform Showcase
   ======================================== */
.platform-showcase {
    margin-top: var(--spacing-3xl);
    animation: fadeInUp 0.6s ease-out 0.4s backwards;
}

.platform-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.platform-icons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.platform-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
    transition: var(--transition);
    cursor: pointer;
}

.platform-icon svg {
    width: 30px;
    height: 30px;
}

.platform-icon:hover {
    background: var(--card-hover);
    border-color: rgba(99, 102, 241, 0.5);
    transform: translateY(-5px);
    color: var(--accent-primary);
}

.platform-icon[data-platform="more"] {
    font-weight: 700;
    font-size: 1.125rem;
}

/* ========================================
   Section Styles
   ======================================== */
section {
    position: relative;
    padding: var(--spacing-3xl) 0;
    z-index: 1;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-3xl);
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.section-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

/* ========================================
   Features Section
   ======================================== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary), var(--accent-tertiary));
    transform: scaleX(0);
    transition: var(--transition);
}

.feature-card:hover {
    background: var(--card-hover);
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateY(-5px);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    color: var(--accent-primary);
    transition: var(--transition);
}

.feature-icon svg {
    width: 30px;
    height: 30px;
}

.feature-card:hover .feature-icon {
    background: rgba(99, 102, 241, 0.2);
    transform: scale(1.1);
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========================================
   How It Works Section
   ======================================== */
.how-it-works {
    background: rgba(255, 255, 255, 0.01);
}

.steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    text-align: center;
    position: relative;
    display: grid;
    grid-template-rows: auto auto 1fr;
    gap: 0;
}

.step-number {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 50%;
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
}

.step-title {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
}

.step-description {
    color: var(--text-secondary);
    line-height: 1.7;
}

.step-connector {
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
    display: none;
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.1));
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.cta-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--bg-darker);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.footer-brand {
    flex: 1;
    min-width: 250px;
}

.footer-tagline {
    color: var(--text-secondary);
    margin-top: var(--spacing-sm);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-2xl: 3rem;
        --spacing-3xl: 4rem;
    }

    .nav-content {
        height: 70px;
    }

    .hero {
        min-height: 90vh;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        justify-content: center;
        width: 100%;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .steps {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-brand {
        min-width: 100%;
    }

    .footer-links {
        justify-content: center;
    }

    .platform-icons {
        gap: var(--spacing-sm);
    }

    .platform-icon {
        width: 55px;
        height: 55px;
    }

    .platform-icon svg {
        width: 26px;
        height: 26px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .logo {
        font-size: 1.25rem;
    }

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

    .nav-login {
        padding: 0.6rem 1.25rem;
        font-size: 0.875rem;
    }

    .feature-card,
    .step {
        padding: var(--spacing-lg);
    }

    .platform-icons {
        gap: var(--spacing-xs);
    }

    .platform-icon {
        width: 50px;
        height: 50px;
    }

    .platform-icon svg {
        width: 24px;
        height: 24px;
    }
}

/* ========================================
   Accessibility
   ======================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for accessibility */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 4px;
}