:root {
  --bg-page: #f5f5f5;
  --panel: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --accent: #3aa655;
  --accent-dark: #2c8c40;
  --border: #3aa655;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: var(--bg-page);
  color: var(--text);
  min-height: 100vh;
}
.site-header {
  width: 100%;
  background: #ffffff;
  border-bottom: 2px solid var(--accent);
  box-shadow: 0 1px 3px rgba(0,0,0,.08);
  position: sticky;
  top: 0;
  z-index: 100;
}
.site-header .header-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
}
.site-header .logo {
  color: var(--accent-dark);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.site-header nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 0.8rem;
}
.site-header nav a {
  color: var(--text);
  text-decoration: none;
  padding: 0.3rem 0.4rem;
  border-bottom: 2px solid transparent;
  font-weight: 600;
  font-size: 0.95rem;
}
.site-header nav a:hover {
  border-bottom-color: var(--accent);
  color: var(--accent-dark);
}
.site-header nav a.active {
  border-bottom-color: var(--accent);
  color: var(--accent-dark);
}
.page-main {
  max-width: 1100px;
  margin: 1.2rem auto 2rem;
  padding: 0 1rem;
}
.hero-banner {
  background: #ffffff;
  border: 2px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,.08);
  padding: 1.2rem;
  margin-bottom: 1rem;
}
.hero-banner h1,
section h1,
section h2,
section h3 {
  font-family: 'Press Start 2P', 'Segoe UI', sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin: 0 0 0.6rem;
}
.section-card,
.card {
  background: #ffffff;
  border: 2px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,.06);
  padding: 0.95rem 1rem;
  margin-bottom: 1rem;
}
.card p,
.section-card p,
.card li,
.section-card li {
  color: #334155;
  line-height: 1.5;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit,minmax(200px,1fr));
  gap: 1rem;
}
.feature-card {
  background: #ffffff;
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 0.9rem;
  box-shadow: 0 3px 8px rgba(0,0,0,.08);
}
.feature-card h3 {
  margin: 0 0 0.5rem;
  font-family: 'Press Start 2P', 'Segoe UI', sans-serif;
  font-size: 0.95rem;
}
input,
textarea,
button,
select {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
input,
textarea {
  width: 100%;
  border: 2px solid var(--border);
  border-radius: 6px;
  background: #ffffff;
  color: #1f2937;
  padding: 0.7rem;
  margin: 0.4rem 0 0.9rem;
}
button,
.primary-btn,
.secondary-btn,
.tag-btn {
  border: 2px solid var(--accent);
  border-radius: 6px;
  background: #ffffff;
  color: var(--accent-dark);
  padding: 0.6rem 0.95rem;
  font-weight: 700;
  cursor: pointer;
}
button:hover,
.primary-btn:hover,
.secondary-btn:hover,
.tag-btn:hover {
  background: var(--accent);
  color: #fff;
}
.chat-panel {
  min-height: 320px;
  max-height: 470px;
  background: #fff;
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 0.9rem;
  overflow-y: auto;
}
.chat-bubble {
  display: inline-block;
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  margin-bottom: 0.55rem;
  max-width: 85%;
  font-size: 0.95rem;
}
.chat-bubble.user {
  align-self: flex-end;
  background: #e3f7ea;
  color: #1f4729;
  border: 2px solid #3aa655;
  margin-left: auto;
}
.chat-bubble.ai {
  align-self: flex-start;
  background: #f0fdf9;
  color: #166333;
  border: 2px solid #8ee0b7;
  margin-right: auto;
}
.chat-input-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.6rem;
  margin-top: 0.65rem;
}
.chat-input-row input {
  border: 2px solid var(--accent);
  border-radius: 6px;
  padding: 0.7rem;
  background: #fff;
}
.chat-input-row button {
  border: 2px solid var(--accent);
  border-radius: 6px;
  background: #fff;
  color: var(--accent-dark);
}
.filter-bar {
  background: #fff;
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 0.75rem;
  margin-bottom: 0.8rem;
}
.side-panel {
  background: #fff;
  border: 2px solid var(--border);
  border-radius: 8px;
  padding: 0.9rem;
}
@media screen and (max-width: 800px) {
  .site-header .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }
  .site-header nav ul {
    flex-wrap: wrap;
  }
  .chat-input-row {
    grid-template-columns: 1fr;
  }
}