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

:root {
  --color-primary: #4DB6AC;
  --color-primary-hover: #3d9e95;
  --color-secondary: #7BC67E;
  --color-brand-gradient: linear-gradient(135deg, #7BC67E, #4DB6AC);
  --color-bg: #F8F9FB;
  --color-text: #1A1D23;
  --color-text-secondary: #5F6775;
  --color-text-muted: #8B92A0;
  --color-code-bg: #F3F4F6;
  --color-border: #E8EBF0;
  --color-white: #ffffff;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', Menlo, Consolas, monospace;
  --max-width: 1040px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

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

img {
  max-width: 100%;
  height: auto;
}

/* ── Layout ── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 96px 0;
}

/* ── Nav ── */
.nav {
  position: sticky;
  top: 0;
  background: rgba(248, 249, 251, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  padding: 0 24px;
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.nav-logo img {
  width: 28px;
  height: 28px;
}

.nav-logo span {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-size: 15px;
  font-weight: 400;
  transition: color 0.15s;
}

.nav-links a:hover {
  color: var(--color-text);
}

.nav-cta {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-white) !important;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  transition: background 0.15s;
}

.nav-cta:hover {
  background: var(--color-primary-hover);
  color: var(--color-white) !important;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle svg {
  display: block;
  width: 24px;
  height: 24px;
  stroke: var(--color-text);
}

/* ── Buttons ── */
.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: background 0.15s, transform 0.1s;
}

.btn:active {
  transform: scale(0.98);
}

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

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

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

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

/* ── Hero ── */
.hero {
  padding: 120px 0 96px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero .subline {
  font-size: clamp(17px, 2vw, 19px);
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

/* ── Screenshots (inline) ── */
.hero-screenshot,
.idea-screenshot,
.showcase-screenshot {
  margin: 48px auto 0;
  max-width: 800px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(0, 0, 0, 0.10), 0 0 0 1px var(--color-border);
}

.hero-screenshot img,
.idea-screenshot img,
.showcase-screenshot img {
  display: block;
  width: 100%;
  height: auto;
}

.screenshot-caption {
  padding: 16px 20px;
  font-size: 14px;
  color: var(--color-text-secondary);
  text-align: center;
  background: var(--color-code-bg);
  font-style: italic;
}

.hero-scroll {
  margin-top: 48px;
}

.hero-scroll a {
  color: var(--color-text-secondary);
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.15s;
}

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

/* ── Section headings ── */
.section-heading {
  margin-bottom: 16px;
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.section-subline {
  color: var(--color-text-secondary);
  font-size: 18px;
  margin-bottom: 40px;
}

/* ── Problem ── */
.problem {
  background: var(--color-white);
}

.problem-text {
  max-width: 680px;
  margin-bottom: 56px;
}

.problem-text p {
  margin-bottom: 16px;
  color: var(--color-text-secondary);
}

.problem-text p:last-child {
  color: var(--color-text);
  font-weight: 600;
}

.options-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.option-card {
  padding: 32px 28px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
}

.option-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
}

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

.option-card.option-highlight {
  border-color: var(--color-primary);
  background: var(--color-white);
  box-shadow: 0 0 0 1px var(--color-primary);
}

.option-card.option-highlight h3 {
  color: var(--color-primary);
}

/* ── Idea ── */
.idea-text {
  max-width: 680px;
  margin-bottom: 48px;
}

.idea-text p {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

/* ── Gallery ── */
.gallery {
  background: var(--color-white);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.gallery-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  transition: box-shadow 0.2s, transform 0.2s;
  cursor: pointer;
}

.gallery-item:hover {
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.10);
  transform: translateY(-2px);
}

.gallery-item img {
  display: block;
  width: 100%;
  height: auto;
}

.gallery-item figcaption {
  padding: 14px 16px;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* Gallery lightbox */
.gallery-lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  align-items: center;
  justify-content: center;
  padding: 32px;
  cursor: zoom-out;
}

.gallery-lightbox.active {
  display: flex;
}

.gallery-lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: var(--radius-md);
  box-shadow: 0 16px 64px rgba(0, 0, 0, 0.4);
}

/* ── MCP Integration ── */
.mcp-integration {
  background: var(--color-white);
}

.mcp-intro {
  max-width: 680px;
  margin-bottom: 48px;
}

.mcp-intro p {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.mcp-screenshots {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-bottom: 48px;
}

.mcp-screenshot-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

.mcp-screenshot-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.mcp-screenshot-label {
  margin-top: 12px;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.mcp-punchline {
  max-width: 680px;
}

.mcp-punchline p {
  font-size: 19px;
  font-weight: 600;
  color: var(--color-text);
  font-style: italic;
  line-height: 1.5;
}

/* ── Features ── */
.features {
  background: var(--color-white);
}

.feature-questions {
  display: flex;
  flex-direction: column;
  gap: 40px;
  margin-bottom: 64px;
}

.feature-q {
  max-width: 680px;
}

.feature-q blockquote {
  font-size: 19px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
  padding-left: 16px;
  border-left: 3px solid var(--color-primary);
}

.feature-q p {
  color: var(--color-text-secondary);
  font-size: 16px;
  padding-left: 16px;
}

.feature-table {
  width: 100%;
  border-collapse: collapse;
}

.feature-table th,
.feature-table td {
  text-align: left;
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  font-size: 15px;
}

.feature-table th {
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-code-bg);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.feature-table td:first-child {
  font-weight: 600;
  white-space: nowrap;
  color: var(--color-text);
}

.feature-table td:last-child {
  color: var(--color-text-secondary);
}

/* ── Showcase ── */
.showcase-text {
  max-width: 680px;
  margin-bottom: 40px;
}

.showcase-text p {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.showcase-text .punchline {
  font-weight: 600;
  color: var(--color-text);
  font-style: italic;
}

.showcase-screenshot {
  margin-bottom: 24px;
}

.showcase-attribution {
  font-size: 15px;
  color: var(--color-text-secondary);
}

.showcase-attribution strong {
  color: var(--color-text);
}

/* ── Audience ── */
.audience {
  background: var(--color-white);
}

.audience-text {
  max-width: 680px;
  margin-bottom: 32px;
}

.audience-text p {
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.audience-aside {
  max-width: 680px;
  padding: 24px 28px;
  border-radius: var(--radius-md);
  background: var(--color-code-bg);
  font-size: 15px;
  color: var(--color-text-secondary);
}

/* ── CTA ── */
.cta-section {
  text-align: center;
}

.cta-section .section-heading {
  margin-bottom: 12px;
}

.cta-text {
  max-width: 600px;
  margin: 0 auto 40px;
  color: var(--color-text-secondary);
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ── Footer ── */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer p {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}

.footer a {
  color: var(--color-text-secondary);
  transition: color 0.15s;
}

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

.footer-legal {
  margin-top: 8px;
}

.footer-sep {
  margin: 0 6px;
  color: var(--color-text-muted);
}

.footer .tagline {
  font-style: italic;
  margin-top: 16px;
}

@media (max-width: 1024px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ── Mobile ── */
@media (max-width: 768px) {
  section {
    padding: 64px 0;
  }

  .hero {
    padding: 80px 0 64px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(248, 249, 251, 0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 24px;
    gap: 20px;
    border-bottom: 1px solid var(--color-border);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-toggle {
    display: block;
  }

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

  .feature-table th,
  .feature-table td {
    padding: 10px 12px;
    font-size: 14px;
  }

  .mcp-screenshots {
    grid-template-columns: 1fr;
  }

  .hero-terminal pre {
    font-size: 12px;
  }

  .gallery-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .hero-screenshot,
  .idea-screenshot,
  .showcase-screenshot {
    margin-top: 32px;
  }
}