/* ============================================================
   JAZZ TERMINAL - DESIGN PRETO PURO + VERDE NEON
   Background: #000000 | Accent: #00ff88 | Secondary: #19d0e8
   ============================================================ */

/* === CSS VARIABLES === */
:root {
    --bg-black: #000000;
    --bg-card: #0a0a0a;
    --bg-card-alt: #111111;
    --accent-green: #00ff88;
    --accent-cyan: #19d0e8;
    --border-subtle: rgba(255, 255, 255, 0.1);
    --border-green: rgba(0, 255, 136, 0.3);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg-black);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background-color: var(--accent-green);
    color: var(--bg-black);
}

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

section {
    padding: 120px 0;
}

/* === HEADER === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-subtle);
    padding: 1.5rem 0;
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav a:hover {
    color: var(--accent-green);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.github-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color 0.3s ease;
}

.github-link:hover {
    color: var(--accent-green);
}

.lang-toggle {
    display: flex;
    gap: 0.5rem;
}

.lang-btn {
    background: transparent;
    border: 1px solid var(--border-subtle);
    color: var(--text-muted);
    font-family: 'Inter', sans-serif;
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-btn:hover {
    border-color: var(--accent-green);
    color: var(--text-primary);
}

.lang-btn.active {
    background: var(--accent-green);
    color: var(--bg-black);
    border-color: var(--accent-green);
}

/* === BADGE === */
.badge {
    display: inline-block;
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid var(--border-green);
    color: var(--accent-green);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 2rem;
}

/* === BUTTONS === */
.btn-primary {
    display: inline-block;
    background: var(--accent-green);
    color: var(--bg-black);
    padding: 14px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 15px;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
}

.btn-primary:hover {
    background: #00ff99;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 255, 136, 0.3);
}

.btn-primary.large {
    padding: 18px 36px;
    font-size: 16px;
}

.btn-secondary {
    display: inline-block;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    padding: 14px 28px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 15px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    border-color: var(--accent-green);
    background: rgba(0, 255, 136, 0.1);
}

.btn-secondary.large {
    padding: 18px 36px;
    font-size: 16px;
}

/* === CARD === */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 32px;
    transition: all 0.3s ease;
}

.card:hover {
    border-color: rgba(0, 255, 136, 0.3);
    transform: translateY(-4px);
}

/* === HERO SECTION === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 180px 0 120px;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: clamp(16px, 2vw, 20px);
    font-weight: 400;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* === TERMINAL WINDOW === */
.terminal-window {
    background: var(--bg-black);
    border: 1px solid var(--accent-cyan);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(25, 208, 232, 0.2);
}

.terminal-header {
    background: rgba(255, 255, 255, 0.05);
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-bottom: 1px solid var(--border-subtle);
}

.terminal-dots {
    display: flex;
    gap: 0.5rem;
}

.terminal-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.terminal-dots .dot.red {
    background: #ff5f56;
}

.terminal-dots .dot.yellow {
    background: #ffbd2e;
}

.terminal-dots .dot.green {
    background: #27c93f;
}

.terminal-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    color: var(--text-secondary);
}

.terminal-body {
    padding: 2rem;
}

/* === KANBAN BOARD === */
.kanban-board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.kanban-column {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    padding: 1.5rem;
    min-height: 180px;
}

.column-header {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.kanban-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    height: 50px;
    margin-bottom: 0.75rem;
    transition: all 0.3s ease;
}

.kanban-card:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.2);
}

.kanban-card.active {
    background: rgba(0, 255, 136, 0.15);
    border-color: var(--accent-green);
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.2);
}

/* === SECTION TITLES === */
.section-title {
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 1.5rem;
}

.section-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    font-weight: 400;
    color: var(--text-secondary);
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
    line-height: 1.6;
}

/* === FEATURES OVERVIEW === */
.features-overview {
    text-align: center;
}

.feature-highlight {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 4rem 3rem;
    margin-bottom: 3rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    transition: all 0.3s ease;
}

.feature-highlight:hover {
    border-color: rgba(0, 255, 136, 0.3);
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 1.5rem;
}

.feature-highlight h3 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.feature-highlight p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.feature-tags {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.tag {
    display: inline-block;
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid var(--border-green);
    color: var(--accent-green);
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 3rem 2rem;
    text-align: center;
    transition: all 0.3s ease;
}

.feature-card:hover {
    border-color: rgba(0, 255, 136, 0.3);
    transform: translateY(-4px);
}

.feature-icon-small {
    font-size: 36px;
    margin-bottom: 1.5rem;
}

.feature-card h4 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.feature-card p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* === AI ASSISTANT === */
.ai-assistant {
    background: var(--bg-card-alt);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.ai-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.ai-left .section-title {
    text-align: left;
    margin-bottom: 2rem;
}

.ai-features {
    list-style: none;
    padding: 0;
}

.ai-features li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
    font-size: 18px;
    color: var(--text-secondary);
}

.ai-features li:before {
    content: "•";
    color: var(--accent-green);
    font-size: 24px;
    font-weight: 700;
}

.terminal-demo {
    background: var(--bg-black);
    border: 1px solid var(--accent-cyan);
    border-radius: 12px;
    padding: 2rem;
    font-family: 'JetBrains Mono', monospace;
}

.terminal-line {
    margin-bottom: 1.5rem;
}

.prompt {
    color: var(--accent-green);
    margin-right: 0.5rem;
}

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

.terminal-response {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
    background: rgba(25, 208, 232, 0.1);
    border-radius: 8px;
    border: 1px solid rgba(25, 208, 232, 0.3);
}

.ai-icon {
    font-size: 20px;
}

.response-text {
    color: var(--text-secondary);
    font-size: 14px;
}

/* === PERFORMANCE === */
.performance {
    text-align: center;
}

.performance-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    max-width: 900px;
    margin: 0 auto;
}

.stat {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 3rem 2rem;
    transition: all 0.3s ease;
}

.stat:hover {
    border-color: var(--accent-green);
    transform: translateY(-4px);
}

.stat-value {
    font-size: 48px;
    font-weight: 800;
    color: var(--accent-green);
    margin-bottom: 0.5rem;
    font-family: 'JetBrains Mono', monospace;
}

.stat-label {
    font-size: 16px;
    color: var(--text-secondary);
}

/* === WORKFLOW COMPARISON === */
.workflow {
    text-align: center;
}

.workflow-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 1000px;
    margin: 0 auto;
}

.workflow-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 3rem 2rem;
    text-align: left;
    transition: all 0.3s ease;
}

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

.workflow-card.before:hover {
    border-color: rgba(255, 87, 87, 0.5);
}

.workflow-card.after:hover {
    border-color: var(--accent-green);
}

.workflow-card h3 {
    font-size: 14px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.workflow-subtitle {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2rem;
}

.workflow-list {
    list-style: none;
    padding: 0;
}

.workflow-list li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
    font-size: 16px;
}

.workflow-list li .icon {
    font-weight: 700;
    font-size: 18px;
}

.workflow-list li.negative .icon {
    color: #ff5757;
}

.workflow-list li.positive .icon {
    color: var(--accent-green);
}

.workflow-list li span:last-child {
    color: var(--text-secondary);
}

/* === TESTIMONIALS === */
.testimonials {
    text-align: center;
    background: var(--bg-card-alt);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.testimonial {
    background: var(--bg-black);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 2.5rem;
    transition: all 0.3s ease;
}

.testimonial:hover {
    border-color: rgba(0, 255, 136, 0.3);
    transform: translateY(-4px);
}

.testimonial-quote {
    font-size: 16px;
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

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

.author-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.author-title {
    font-size: 14px;
    color: var(--text-muted);
}

/* === FINAL CTA === */
.final-cta {
    text-align: center;
    padding: 160px 0;
}

.cta-title {
    font-size: clamp(32px, 6vw, 56px);
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    margin-bottom: 3rem;
}

.cta-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* === ABOUT CREATOR === */
.about-creator {
    background: var(--bg-card-alt);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.creator-card {
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg-black);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 4rem 3rem;
}

.creator-header {
    text-align: center;
    margin-bottom: 2rem;
}

.creator-name {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.creator-chinese {
    color: var(--accent-green);
    font-size: 28px;
    margin-left: 0.5rem;
}

.creator-location {
    font-size: 16px;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.creator-quote {
    font-size: 24px;
    font-style: italic;
    font-weight: 300;
    color: var(--text-secondary);
    text-align: center;
    line-height: 1.6;
    border: none;
    margin-bottom: 3rem;
}

.creator-bio {
    margin-bottom: 2.5rem;
}

.creator-bio p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.creator-companies {
    text-align: center;
    font-size: 16px;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 3rem;
    padding: 1.5rem 0;
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.creator-why {
    background: rgba(0, 255, 136, 0.05);
    border: 1px solid var(--border-green);
    border-radius: 12px;
    padding: 2.5rem;
}

.creator-why h4 {
    font-size: 20px;
    font-weight: 700;
    color: var(--accent-green);
    margin-bottom: 1rem;
}

.creator-why p {
    font-size: 16px;
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* === EXPERIMENTS === */
.experiments {
    text-align: center;
}

.experiment-card {
    max-width: 700px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 4rem 3rem;
    transition: all 0.3s ease;
}

.experiment-card:hover {
    border-color: rgba(0, 255, 136, 0.3);
    transform: translateY(-4px);
}

.experiment-icon {
    font-size: 64px;
    margin-bottom: 1.5rem;
}

.experiment-card h3 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.experiment-card p {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.experiment-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-green);
    text-decoration: none;
    font-size: 18px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.experiment-link:hover {
    color: #00ff99;
    transform: translateX(4px);
}

/* === MENTORSHIP === */
.mentorship {
    text-align: center;
    background: var(--bg-card-alt);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.mentorship-card {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-black);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 4rem 3rem;
}

.mentorship-intro {
    font-size: 24px;
    font-weight: 600;
    color: var(--accent-green);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.mentorship-description {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 3rem;
}

.mentorship-features {
    list-style: none;
    padding: 0;
    margin-bottom: 3rem;
    text-align: left;
}

.mentorship-features li {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
    font-size: 18px;
    color: var(--text-secondary);
}

.mentorship-features .check {
    color: var(--accent-green);
    font-size: 24px;
    font-weight: 700;
}

/* === BLOG === */
.blog {
    text-align: center;
}

.blog-card {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 4rem 3rem;
    transition: all 0.3s ease;
}

.blog-card:hover {
    border-color: rgba(0, 255, 136, 0.3);
    transform: translateY(-4px);
}

.blog-icon {
    font-size: 64px;
    margin-bottom: 1.5rem;
}

.blog-card h3 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: 0.5rem;
}

.blog-subtitle {
    font-size: 18px;
    font-style: italic;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.blog-excerpt {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 2rem;
}

.blog-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-green);
    text-decoration: none;
    font-size: 18px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.blog-link:hover {
    color: #00ff99;
    transform: translateX(4px);
}

/* === FOOTER === */
.footer {
    padding: 80px 0 40px;
    border-top: 1px solid var(--border-subtle);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.footer-tagline {
    font-size: 14px;
    color: var(--text-muted);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-column h4 {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 0.75rem;
    transition: color 0.3s ease;
}

.footer-column a:hover {
    color: var(--accent-green);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-subtle);
}

.footer-bottom p {
    font-size: 14px;
    color: var(--text-muted);
}

.footer-lang {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-lang-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 14px;
    cursor: pointer;
    transition: color 0.3s ease;
}

.footer-lang-btn:hover {
    color: var(--accent-green);
}

.footer-lang-btn.active {
    color: var(--accent-green);
    font-weight: 600;
}

.footer-lang .separator {
    color: var(--text-muted);
}

/* === RESPONSIVE === */
@media (max-width: 992px) {
    .header .nav {
        display: none;
    }

    .hero-content,
    .ai-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .features-grid,
    .performance-stats,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .workflow-comparison {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    section {
        padding: 80px 0;
    }

    .container {
        padding: 0 1.5rem;
    }

    .header {
        padding: 1rem 0;
    }

    .hero {
        padding: 140px 0 80px;
    }

    .kanban-board {
        grid-template-columns: 1fr;
    }

    .final-cta {
        padding: 80px 0;
    }

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

    .btn-primary,
    .btn-secondary {
        width: 100%;
        text-align: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .header-right {
        gap: 1rem;
    }

    .github-link {
        display: none;
    }

    .creator-card,
    .experiment-card,
    .mentorship-card,
    .blog-card {
        padding: 2.5rem 2rem;
    }

    .feature-highlight {
        padding: 3rem 2rem;
    }
}