/* ================================
   CSS Variables & Reset
   ================================ */
:root {
    /* Color Palette - Monochrome only */
    --color-black: #0a0a0a;
    --color-dark: #1a1a1a;
    --color-medium: #505050;
    --color-light-gray: #888888;
    --color-lighter-gray: #cccccc;
    --color-white: #ffffff;
    
    /* Gradients */
    --gradient-primary: linear-gradient(90deg, var(--color-dark) 0%, var(--color-medium) 100%);
    --gradient-bg: radial-gradient(ellipse at center, #1a1a1a 0%, #0a0a0a 70%);
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-xl: clamp(2.5rem, 5vw, 4rem);
    --font-size-lg: clamp(1.8rem, 3vw, 2.5rem);
    --font-size-md: clamp(1.2rem, 2vw, 1.5rem);
    --font-size-base: 1rem;
    --font-size-sm: 0.9rem;
    --font-size-xs: 0.8rem;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 6rem;
    
    /* Layout */
    --container-max-width: 1200px;
    --navbar-height: 80px;
    --border-radius: 6px;
    
    /* Effects */
    --glow-primary: 0 0 20px rgba(255, 255, 255, 0.1);
    --glow-button: 0 0 15px rgba(255, 255, 255, 0.15);
    --transition-smooth: 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: var(--font-primary);
    background: var(--gradient-bg);
    color: var(--color-white);
    line-height: 1.6;
    user-select: text;
    min-height: 100vh;
    overflow-x: hidden;
}

img {
    pointer-events: none;
    user-drag: none;
    -webkit-user-drag: none;
    -moz-user-drag: none;
    -ms-user-drag: none;
    max-width: 100%;
    height: auto;
}

/* ================================
   Typography
   ================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 300;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-sm);
}

h1 {
    font-size: var(--font-size-xl);
    font-weight: 200;
}

h2 {
    font-size: var(--font-size-lg);
}

h3 {
    font-size: var(--font-size-md);
}

p {
    font-size: var(--font-size-base);
    color: var(--color-lighter-gray);
    margin-bottom: var(--space-sm);
}

a {
    color: var(--color-white);
    text-decoration: none;
    transition: var(--transition-smooth);
}

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

.section-title {
    text-align: center;
    margin-bottom: var(--space-lg);
    color: var(--color-white);
}

/* ================================
   Navigation
   ================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background: var(--color-black);
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: var(--container-max-width);
    height: 100%;
    margin: 0 auto;
    padding: 0 var(--space-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 8px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.logo-small {
    width: 32px;
    height: 32px;
}

.nav-brand {
    font-size: var(--font-size-md);
    font-weight: 400;
    color: var(--color-white);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-lg);
}

.nav-link {
    color: var(--color-light-gray);
    font-size: var(--font-size-sm);
    font-weight: 400;
    padding: var(--space-xs) 0;
    position: relative;
    transition: var(--transition-smooth);
}

.nav-link:hover {
    color: var(--color-white);
    text-shadow: var(--glow-primary);
}

.nav-social {
    display: flex;
    align-items: center;
    margin-left: var(--space-sm);
}

.nav-social-link {
    color: var(--color-light-gray);
    padding: var(--space-xs);
    border-radius: var(--border-radius);
    transition: var(--transition-smooth);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transform: translateY(-2px);
}

.nav-social-link:hover {
    color: var(--color-white);
    background: var(--color-dark);
    transform: translateY(-3px);
}

/* ================================
   Hero Section
   ================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: var(--navbar-height);
    text-align: center;
    overflow: hidden;
}

.spiral-left,
.spiral-right {
    position: absolute;
    top: 0;
    width: 40vw;
    height: 100vh;
    opacity: 0.03;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg width='400' height='800' viewBox='0 0 400 800' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M200 50C250 50 300 100 300 150C300 200 250 250 200 250C150 250 100 200 100 150C100 100 150 50 200 50Z' stroke='%23ffffff' stroke-width='1' fill='none'/%3E%3Cpath d='M200 150C275 150 350 225 350 300C350 375 275 450 200 450C125 450 50 375 50 300C50 225 125 150 200 150Z' stroke='%23ffffff' stroke-width='1' fill='none'/%3E%3Cpath d='M200 300C325 300 450 425 450 550C450 675 325 800 200 800C75 800 -50 675 -50 550C-50 425 75 300 200 300Z' stroke='%23ffffff' stroke-width='1' fill='none'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
}

.spiral-left {
    left: -20vw;
    transform: rotate(-15deg);
}

.spiral-right {
    right: -20vw;
    transform: rotate(15deg) scaleX(-1);
}

.hero-content {
    max-width: 600px;
    z-index: 10;
}

.hero-logo {
    margin-bottom: var(--space-md);
}

.logo-main {
    width: 120px;
    height: 120px;
    filter: drop-shadow(var(--glow-primary));
}

.hero-tagline {
    margin-bottom: var(--space-lg);
    color: var(--color-white);
}

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

.btn-primary,
.btn-secondary {
    padding: 16px 32px;
    border: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-smooth);
    text-decoration: none;
    display: inline-block;
    min-width: 160px;
    text-align: center;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 25px rgba(255, 255, 255, 0.2);
}

.btn-secondary {
    background: transparent;
    color: var(--color-lighter-gray);
    border: 1px solid var(--color-medium);
}

.btn-secondary:hover {
    background: var(--color-dark);
    color: var(--color-white);
    border-color: var(--color-light-gray);
}

.hero-email {
    margin-top: var(--space-md);
}

.email-link {
    color: var(--color-light-gray);
    font-size: var(--font-size-sm);
    border-bottom: 1px solid transparent;
    transition: var(--transition-smooth);
}

.email-link:hover {
    color: var(--color-white);
    border-bottom-color: var(--color-medium);
}

/* ================================
   Problem Statement
   ================================ */
.problem {
    padding: var(--space-xl) 0;
    text-align: center;
    background: linear-gradient(180deg, transparent 0%, rgba(26, 26, 26, 0.3) 50%, transparent 100%);
}

.problem-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.problem-headline {
    font-size: var(--font-size-lg);
    font-weight: 200;
    margin-bottom: var(--space-md);
    color: var(--color-white);
}

.problem-description {
    font-size: var(--font-size-md);
    color: var(--color-lighter-gray);
    line-height: 1.8;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--space-lg);
    margin-top: var(--space-lg);
}

.feature-card {
    background: linear-gradient(145deg, rgba(26, 26, 26, 0.5) 0%, rgba(16, 16, 16, 0.3) 100%);
    border: 1px solid rgba(80, 80, 80, 0.2);
    border-radius: var(--border-radius);
    padding: var(--space-lg);
    text-align: center;
    transition: var(--transition-smooth);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(80, 80, 80, 0.4);
    box-shadow: var(--glow-primary);
}

.feature-icon {
    margin-bottom: var(--space-md);
    color: var(--color-lighter-gray);
}

.feature-icon svg {
    width: 48px;
    height: 48px;
}

.feature-title {
    color: var(--color-white);
    margin-bottom: var(--space-sm);
    font-weight: 400;
}

.feature-description {
    color: var(--color-light-gray);
    line-height: 1.7;
}

/* ================================
   How It Works Section
   ================================ */
.how-it-works {
    padding: var(--space-xl) 0;
    background: linear-gradient(180deg, transparent 0%, rgba(26, 26, 26, 0.2) 50%, transparent 100%);
}

.pipeline {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-top: var(--space-lg);
}

.pipeline-step {
    text-align: center;
    max-width: 280px;
    flex: 1;
    min-width: 250px;
}

.step-icon {
    margin-bottom: var(--space-md);
    color: var(--color-light-gray);
}

.step-icon svg {
    width: 64px;
    height: 64px;
}

.step-title {
    color: var(--color-white);
    margin-bottom: var(--space-sm);
    font-weight: 400;
}

.step-description {
    color: var(--color-light-gray);
    line-height: 1.7;
}

.pipeline-arrow {
    color: var(--color-medium);
    margin: 0 var(--space-sm);
    flex-shrink: 0;
}

.pipeline-arrow svg {
    width: 32px;
    height: 16px;
}

/* ================================
   Testimonials Section
   ================================ */
.testimonials {
    padding: var(--space-xl) 0;
}

.testimonials-carousel {
    position: relative;
    max-width: 800px;
    margin: 0 auto var(--space-lg);
    overflow: hidden;
}

.testimonial-card {
    background: linear-gradient(145deg, rgba(26, 26, 26, 0.4) 0%, rgba(16, 16, 16, 0.2) 100%);
    border: 1px solid rgba(80, 80, 80, 0.15);
    border-radius: var(--border-radius);
    padding: var(--space-lg);
    text-align: center;
    margin: 0 var(--space-md);
    display: none;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

.testimonial-card.active {
    display: block;
    opacity: 1;
}

.testimonial-quote {
    font-size: var(--font-size-md);
    color: var(--color-lighter-gray);
    line-height: 1.8;
    margin-bottom: var(--space-lg);
    font-style: italic;
    position: relative;
}

.testimonial-quote::before,
.testimonial-quote::after {
    content: '"';
    font-size: 2em;
    color: var(--color-medium);
    position: absolute;
}

.testimonial-quote::before {
    left: -0.3em;
    top: -0.1em;
}

.testimonial-quote::after {
    right: -0.3em;
    bottom: -0.1em;
}

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

.author-name {
    color: var(--color-white);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.author-title {
    color: var(--color-light-gray);
    font-size: var(--font-size-sm);
}

.carousel-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.carousel-btn {
    background: transparent;
    border: 1px solid var(--color-medium);
    color: var(--color-light-gray);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.carousel-btn:hover {
    background: var(--color-dark);
    color: var(--color-white);
    border-color: var(--color-light-gray);
}

.carousel-dots {
    display: flex;
    gap: var(--space-xs);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-medium);
    border: none;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.dot.active,
.dot:hover {
    background: var(--color-lighter-gray);
}

/* ================================
   Footer
   ================================ */
.footer {
    padding: var(--space-lg) 0;
    border-top: 1px solid rgba(80, 80, 80, 0.2);
    margin-top: var(--space-xl);
}

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

.footer-copyright {
    color: var(--color-light-gray);
    font-size: var(--font-size-sm);
}

.footer-social {
    display: flex;
    gap: var(--space-md);
}

.social-link {
    color: var(--color-light-gray);
    padding: var(--space-xs);
    border-radius: var(--border-radius);
    transition: var(--transition-smooth);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transform: translateY(0);
}

.social-link:hover {
    color: var(--color-white);
    background: var(--color-dark);
    transform: translateY(-2px);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

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

    .nav-menu {
        gap: var(--space-md);
    }

    .nav-social {
        margin-left: var(--space-xs);
    }

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

    .btn-primary,
    .btn-secondary {
        min-width: 200px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }

    .pipeline {
        flex-direction: column;
        gap: var(--space-lg);
    }

    .pipeline-arrow {
        transform: rotate(90deg);
        margin: var(--space-sm) 0;
    }

    .spiral-left,
    .spiral-right {
        display: none;
    }

    .navbar {
        height: 70px;
    }

    .nav-container {
        padding-top: 4px;
    }

    .hero {
        padding-top: 70px;
    }
}

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

    .nav-container {
        padding: 0 var(--space-sm);
        padding-top: 4px;
    }

    .nav-menu {
        gap: var(--space-sm);
    }

    .nav-link {
        font-size: var(--font-size-xs);
    }

    .nav-social {
        margin-left: 0;
    }

    .nav-social-link svg {
        width: 16px;
        height: 16px;
    }

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

    .feature-card {
        padding: var(--space-md);
    }

    .testimonial-card {
        margin: 0;
        padding: var(--space-md);
    }

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

@media (max-width: 320px) {
    .btn-primary,
    .btn-secondary {
        min-width: 140px;
        padding: 12px 20px;
        font-size: var(--font-size-sm);
    }

    .hero-content {
        padding: 0 var(--space-xs);
    }
}