@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=IBM+Plex+Sans:wght@300;400;500;600;700&display=swap');

:root {
  --font-display: 'Space Mono', monospace;
  --font-body: 'IBM Plex Sans', sans-serif;
  --bg: #0a0a0a;
  --bg-card: #141414;
  --bg-hover: #1a1a1a;
  --text: #e8e8e8;
  --text-muted: #888;
  --border: #222;
  --radius: 6px;
  --accent: #06B6D4;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: var(--font-body); background: var(--bg); color: var(--text); line-height: 1.6; }
h1, h2, h3 { font-family: var(--font-display); }

/* Nav */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  border-bottom: 1px solid var(--border);
  max-width: 1200px;
  margin: 0 auto;
}
nav .brand {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
}
nav .nav-links { display: flex; gap: 1.5rem; list-style: none; }
nav .nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
}
nav .nav-links a:hover { color: var(--text); }

/* Hero */
.hero {
  text-align: center;
  padding: 2rem 2rem 1rem;
  max-width: 800px;
  margin: 0 auto;
}
.hero h1 { font-size: 2rem; margin-bottom: 0.5rem; }
.hero p { color: var(--text-muted); font-size: 1.1rem; }

/* Toolbar */
.canvas-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  padding: 1rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}
.toolbar-group {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}
.toolbar-group label {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-right: 0.25rem;
}
.btn {
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text);
  cursor: pointer;
  font-size: 0.85rem;
  font-family: var(--font-body);
  transition: all 0.2s;
  user-select: none;
}
.btn:hover { border-color: var(--accent); }
.btn-accent {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
  font-weight: 600;
}
.btn-accent:hover { opacity: 0.9; }
.btn.active {
  background: var(--accent);
  color: #000;
  border-color: var(--accent);
}

select.btn {
  appearance: none;
  padding-right: 1.5rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23888' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.5rem center;
}

/* Canvas */
.canvas-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem 2rem;
}
.canvas-area {
  width: 100%;
  height: 500px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
  cursor: default;
}
.canvas-area svg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}
.canvas-area svg line { pointer-events: none; }

/* Blocks */
.block {
  position: absolute;
  min-width: 140px;
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 0.6rem 0.8rem;
  cursor: grab;
  user-select: none;
  z-index: 2;
  transition: border-color 0.15s;
}
.block:hover { border-color: var(--accent); }
.block.selected { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(6,182,212,0.25); }
.block .block-type {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.25rem;
}
.block .block-label {
  font-size: 0.85rem;
  color: var(--text);
  word-break: break-word;
}
.block .port {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--accent);
  border: 2px solid var(--bg);
  border-radius: 50%;
  cursor: crosshair;
  z-index: 3;
}
.block .port-out { bottom: -6px; right: 20px; }
.block .port-in { top: -6px; left: 20px; }
.block .delete-btn {
  position: absolute;
  top: -8px;
  right: -8px;
  width: 18px;
  height: 18px;
  background: #e11d48;
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 0.7rem;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  line-height: 1;
  z-index: 4;
}
.block.selected .delete-btn { display: flex; }

/* Edit Modal */
.modal-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0,0,0,0.7);
  z-index: 100;
  align-items: center;
  justify-content: center;
}
.modal-overlay.open { display: flex; }
.modal {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  width: 90%;
  max-width: 450px;
}
.modal h3 { margin-bottom: 1rem; font-size: 1rem; }
.modal textarea, .modal input[type="text"] {
  width: 100%;
  padding: 0.6rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
  resize: vertical;
}
.modal textarea { min-height: 80px; }
.modal textarea:focus, .modal input:focus { outline: none; border-color: var(--accent); }
.modal-actions { display: flex; gap: 0.5rem; justify-content: flex-end; }

/* Footer */
footer {
  max-width: 1200px;
  margin: 3rem auto 0;
  padding: 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}
footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* Blog / Pages */
.page-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem;
}
.page-content h1 { font-size: 1.8rem; margin-bottom: 1rem; }
.page-content h2 { font-size: 1.3rem; margin: 2rem 0 0.75rem; }
.page-content p { margin-bottom: 1rem; }
.page-content a { color: var(--accent); text-decoration: none; }
.page-content a:hover { text-decoration: underline; }
.page-content ul, .page-content ol { margin: 0 0 1rem 1.5rem; }
.page-content li { margin-bottom: 0.5rem; }
.page-content code {
  background: var(--bg-card);
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
  font-family: var(--font-display);
  font-size: 0.85rem;
}
.page-content pre {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  overflow-x: auto;
  margin-bottom: 1rem;
}
.page-content pre code { background: none; padding: 0; }
.blog-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1rem;
  transition: border-color 0.2s;
}
.blog-card:hover { border-color: var(--accent); }
.blog-card h2 { margin: 0 0 0.5rem; font-size: 1.2rem; }
.blog-card h2 a { color: var(--text); text-decoration: none; }
.blog-card h2 a:hover { color: var(--accent); }
.blog-card .meta { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 0.5rem; }
.blog-card .excerpt { color: var(--text-muted); font-size: 0.95rem; }

/* Responsive */
@media (max-width: 640px) {
  nav { padding: 1rem; }
  .hero { padding: 1.5rem 1rem 0.75rem; }
  .hero h1 { font-size: 1.5rem; }
  .canvas-toolbar { padding: 0.75rem 1rem; }
  .canvas-wrapper { padding: 0 1rem 1rem; }
  .canvas-area { height: 350px; }
  .page-content { padding: 1.5rem 1rem; }
}