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

:root {
    --black: #000000;
    --white: #ffffff;
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #e5e5e5;
    --gray-300: #d4d4d4;
    --gray-400: #a3a3a3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;

    --spacing-xs: 0.25rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4rem;
    --spacing-2xl: 5rem;

    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    color: var(--gray-900);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--gray-200);
    z-index: 1000;
    transition: var(--transition);
}

.nav-content {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    align-items: center;
    height: 80px;
    gap: 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--black);
}

.nav-center {
    display: flex;
    justify-content: center;
    gap: 2rem;
}

.nav-center a {
    color: var(--gray-600);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-center a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--black);
    transition: var(--transition);
}

.nav-center a:hover {
    color: var(--black);
}

.nav-center a:hover::after {
    width: 100%;
}

.nav-right {
    display: flex;
    justify-content: flex-end;
}

.nav-link-faq {
    color: var(--gray-600);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

.nav-link-faq:hover {
    color: var(--black);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(180deg, var(--white) 0%, var(--gray-100) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 150%;
    height: 100%;
    background: radial-gradient(circle at 50% 0%, var(--gray-200) 0%, transparent 70%);
    opacity: 0.5;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.hero-title {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    color: var(--black);
}

.hero-title-split {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
}

.hero-title .line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

.hero-title .line:nth-child(2) {
    animation-delay: 0.2s;
}

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

.hero-subtitle {
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
    line-height: 1.6;
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.4s forwards;
}

/* Demo Input */
.demo-input {
    max-width: 765px;
    margin: 0 auto var(--spacing-xl);
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.6s forwards;
}

.input-wrapper {
    background: var(--white);
    border: 2px solid var(--black);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: flex;
    gap: 1rem;
    align-items: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
}

.input-display {
    flex: 1;
    font-size: 1.1rem;
    color: var(--gray-700);
    text-align: left;
    line-height: 1.5rem;
    min-height: 1.5rem;
    display: flex;
    align-items: center;
}

.typed-text {
    display: inline;
}

.cursor-blink {
    animation: blink 1s step-end infinite;
    color: var(--black);
    display: inline;
    line-height: 1.5rem;
}

@keyframes blink {
    50% { opacity: 0; }
}

.generate-btn {
    background: var(--black);
    color: var(--white);
    border: none;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    white-space: nowrap;
}

.generate-btn:hover {
    transform: translateX(4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* Hero Stats */
.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    opacity: 0;
    animation: fadeInUp 0.8s ease 0.8s forwards;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: var(--black);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Sections */
.section {
    padding: var(--spacing-2xl) 0;
    position: relative;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.03em;
    color: var(--black);
}


/* How It Works */
.how-it-works {
    background: var(--gray-50);
    padding: var(--spacing-2xl) 0;
}

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.step {
    text-align: center;
    padding: var(--spacing-lg);
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    position: relative;
    background: var(--white);
}

.step:hover {
    border-color: var(--black);
    transform: translateY(-8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
}

.step-number {
    position: absolute;
    top: -1rem;
    left: 2rem;
    background: var(--black);
    color: var(--white);
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 700;
}

.step-icon {
    margin: var(--spacing-sm) 0;
}

.step-icon svg {
    stroke: var(--black);
    width: 36px;
    height: 36px;
}

.step-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--black);
}

.step-description {
    color: var(--gray-600);
    line-height: 1.5;
    font-size: 0.95rem;
}

/* Feature Carousel */
.feature-carousel {
    background: var(--gray-50);
    padding: var(--spacing-2xl) 0;
    overflow: hidden;
}

.carousel-container {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 60px;
}

.carousel-track-container {
    overflow: hidden;
    min-height: 600px;
}

.carousel-track {
    display: flex;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-slide {
    min-width: 100%;
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}

.carousel-slide.active {
    opacity: 1;
    pointer-events: auto;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: var(--black);
    color: var(--white);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: var(--transition);
}

.carousel-btn:hover {
    background: var(--gray-800);
    transform: translateY(-50%) scale(1.1);
}

.carousel-prev {
    left: 0;
}

.carousel-next {
    right: 0;
}

.carousel-indicators {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin-top: var(--spacing-lg);
}

.indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 2px solid var(--gray-400);
    background: transparent;
    cursor: pointer;
    transition: var(--transition);
}

.indicator.active {
    background: var(--black);
    border-color: var(--black);
}

/* Use Cases Slide */
.use-cases-slide {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    min-height: 600px;
    display: flex;
    align-items: flex-start;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    align-items: stretch;
    width: 100%;
}

@media (max-width: 968px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
}

.case-card {
    background: var(--white);
    padding: var(--spacing-lg) var(--spacing-xl);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    height: 450px;
}

.case-card:hover {
    transform: translateY(-4px);
}

.case-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.case-icon svg {
    stroke: var(--black);
}

.case-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--black);
}

.case-description {
    color: var(--gray-600);
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
    font-size: 0.95rem;
    flex: 1;
}

.case-input {
    background: var(--gray-100);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    padding: var(--spacing-sm);
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    color: var(--gray-700);
    line-height: 1.5;
}

/* Deep Dive Example */
.deep-dive {
    background: var(--white);
    padding: var(--spacing-2xl) 0;
}

.example-showcase {
    max-width: 900px;
    margin: 0 auto;
}

.example-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    padding: 0;
}

.example-icon-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.example-icon {
    font-size: 3rem;
}

.example-icon svg {
    stroke: var(--black);
}

.example-icon-wrapper h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--black);
}

.example-description {
    color: var(--gray-600);
    font-size: 1.1rem;
    max-width: 800px;
    white-space: nowrap;
}

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

.pipeline-step {
    display: flex;
    gap: var(--spacing-md);
    position: relative;
}

.pipeline-step::before {
    content: '';
    position: absolute;
    left: 1.5rem;
    top: 3rem;
    bottom: -1rem;
    width: 2px;
    background: var(--gray-300);
}

.pipeline-step:last-child::before {
    display: none;
}

.pipeline-number {
    flex-shrink: 0;
    width: 3rem;
    height: 3rem;
    background: var(--black);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    z-index: 1;
}

.pipeline-content {
    flex: 1;
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 2px solid var(--gray-200);
}

.pipeline-content h4 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: var(--spacing-sm);
}

.pipeline-box {
    background: transparent;
    padding: var(--spacing-sm) 0;
    margin-top: var(--spacing-sm);
}

.pipeline-box p {
    color: var(--gray-700);
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

.pipeline-box p:last-child {
    margin-bottom: 0;
}

.pipeline-box ul {
    list-style: none;
    padding: 0;
}

.pipeline-box li {
    color: var(--gray-700);
    padding: 0.5rem 0;
    line-height: 1.6;
}

.pipeline-box li::before {
    content: '•';
    margin-right: 0.5rem;
    color: var(--black);
    font-weight: 700;
}

.alt-strategy {
    opacity: 0.5;
}

.strikethrough {
    text-decoration: line-through;
    text-decoration-color: var(--gray-400);
}

.output-preview {
    margin-top: var(--spacing-md);
    display: flex;
    justify-content: center;
}

.app-icon {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: var(--gray-100);
    border-radius: var(--radius-md);
    min-width: 100px;
}

.app-icon-emoji {
    font-size: 2.5rem;
}

.app-icon-emoji svg {
    stroke: var(--black);
}

.app-icon-label {
    font-weight: 600;
    color: var(--black);
    font-size: 0.85rem;
    text-align: center;
}

/* Platform Slide */
.platform-slide {
    background: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    min-height: 600px;
    display: flex;
    align-items: center;
}

.platform-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    align-items: stretch;
    width: 100%;
}

@media (max-width: 968px) {
    .platform-grid {
        grid-template-columns: 1fr;
    }
}

.platform-card {
    background: var(--white);
    padding: var(--spacing-xl);
    padding-top: 6rem;
    padding-bottom: var(--spacing-2xl);
    text-align: center;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 450px;
}

.platform-card:hover {
    transform: translateY(-4px);
}

.platform-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.platform-icon svg {
    stroke: var(--black);
}

.platform-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--black);
}

.platform-description {
    color: var(--gray-600);
    line-height: 1.5;
    font-size: 0.9rem;
    flex: 1;
}

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

@media (max-width: 968px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

.feature-card {
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 2px solid var(--gray-200);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--black);
    background: var(--gray-100);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

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

.feature-description {
    color: var(--gray-600);
    line-height: 1.6;
}

/* Roadmap */
.roadmap {
    background: var(--white);
    padding: var(--spacing-2xl) 0;
}

.roadmap-timeline {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.roadmap-item {
    display: flex;
    gap: var(--spacing-lg);
    position: relative;
    align-items: flex-start;
}

.roadmap-item::before {
    content: '';
    position: absolute;
    left: 3.5rem;
    top: 3rem;
    bottom: -2rem;
    width: 2px;
    background: var(--gray-300);
}

.roadmap-item:last-child::before {
    display: none;
}

.roadmap-status {
    flex-shrink: 0;
    width: 7rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.status-badge {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.status-badge.developing {
    background: var(--black);
    color: var(--white);
}

.status-badge.tobe {
    background: var(--gray-200);
    color: var(--gray-600);
}

.roadmap-content {
    flex: 1;
    background: transparent;
    padding: 0;
    transition: var(--transition);
}

.roadmap-item.active .roadmap-content {
    background: transparent;
}

.roadmap-content:hover {
    transform: translateX(8px);
}

.roadmap-icon {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.roadmap-icon svg {
    stroke: var(--black);
    width: 32px;
    height: 32px;
}

.roadmap-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--black);
    margin-bottom: 0.5rem;
    margin-top: 0;
    line-height: 1.5;
}

.roadmap-content > p {
    color: var(--gray-600);
    line-height: 1.5;
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

.roadmap-features {
    list-style: none;
    padding: 0;
    margin-top: var(--spacing-sm);
}

.roadmap-features li {
    color: var(--gray-700);
    padding: 0.35rem 0;
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.5;
    font-size: 0.9rem;
}

.roadmap-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--black);
    font-weight: 700;
    font-size: 0.85rem;
}

.roadmap-item:not(.active) .roadmap-features li::before {
    content: '◦';
    color: var(--gray-400);
}

/* FAQ */
.faq {
    background: var(--gray-50);
    padding: var(--spacing-2xl) 0;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    border-bottom: 2px solid var(--gray-200);
    padding: 1.5rem 0;
    transition: var(--transition);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    gap: var(--spacing-md);
}

.faq-question h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--black);
}

.faq-toggle {
    font-size: 2rem;
    font-weight: 300;
    color: var(--gray-600);
    transition: var(--transition);
    flex-shrink: 0;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
    opacity: 0;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    opacity: 1;
}

.faq-answer p {
    margin-top: 1rem;
    color: var(--gray-600);
    line-height: 1.6;
}

/* CTA */
.cta {
    background: var(--gray-900);
    color: var(--white);
    text-align: center;
}

.cta-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    color: var(--white);
}

.cta-subtitle {
    font-size: 1.25rem;
    color: var(--gray-400);
    margin-bottom: var(--spacing-lg);
}

.cta-form {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 500px;
    margin: 0 auto var(--spacing-md);
}

.cta-input {
    flex: 1;
    padding: 1rem 1.5rem;
    border: 2px solid var(--gray-700);
    border-radius: var(--radius-md);
    background: var(--gray-800);
    color: var(--white);
    font-size: 1rem;
    transition: var(--transition);
}

.cta-input:focus {
    outline: none;
    border-color: var(--white);
}

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

.cta-button {
    background: var(--white);
    color: var(--black);
    border: none;
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 255, 255, 0.2);
}

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

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

.footer-content {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.footer-content .logo {
    color: var(--white);
    margin-bottom: var(--spacing-xs);
    font-size: 1.5rem;
}

.footer-contact {
    color: var(--gray-400);
    font-size: 0.95rem;
}

.footer-bottom {
    border-top: 1px solid var(--gray-800);
    padding-top: var(--spacing-lg);
    text-align: center;
    color: var(--gray-600);
    font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-content {
        grid-template-columns: 1fr;
    }

    .nav-center,
    .nav-right {
        display: none;
    }

    .hero {
        min-height: auto;
        padding: var(--spacing-xl) 0;
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .demo-input {
        flex-direction: column;
    }

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

    .pipeline-step {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .pipeline-step::before {
        left: 1.5rem;
        top: 3.5rem;
    }

    .pipeline-number {
        width: 3rem;
        height: 3rem;
        font-size: 1rem;
    }

    .roadmap-item {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .roadmap-item::before {
        display: none;
    }

    .roadmap-status {
        width: 100%;
        align-items: flex-start;
    }




    .cta-form {
        flex-direction: column;
    }
}

/* Scroll animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}