:root {
  color-scheme: dark;
  font-family: 'JetBrains Mono', 'SFMono-Regular', Consolas, Menlo, monospace;
  --bg: #050505;
  --bg-alt: #0f0f0f;
  --text: #f8fafc;
  --accent: #f48c06;
  --border: rgba(255,255,255,0.2);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: linear-gradient(180deg, var(--bg-alt) 0%, var(--bg) 100%);
  color: var(--text);
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  padding: 1.5rem;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: clamp(1.5rem, 4vw, 2.5rem);
}

main {
  width: min(1100px, 100%);
  margin: 0 auto;
  padding: 1rem;
  flex: 1;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1rem;
}

a.card {
  text-decoration: none;
  color: inherit;
  border: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.8);
  padding: 1.25rem;
  border-radius: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

a.card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.card p {
  margin: 0;
  color: #d1d1d1;
  font-size: 0.9rem;
}

.nav-link {
  display: inline-flex;
  gap: 0.5rem;
  align-items: center;
  color: var(--accent);
  text-decoration: none;
  font-weight: bold;
}

section.article {
  background: rgba(0, 0, 0, 0.85);
  padding: 1.5rem;
  border-radius: 0;
  border: 1px solid var(--border);
}

section.article h2 {
  margin-top: 0;
}

.control-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}

.control-panel label,
.control-panel input,
.control-panel textarea {
  width: 100%;
}

.control {
  flex: 1;
  min-width: 200px;
}

.control input[type="range"] {
  width: 100%;
}

textarea {
  width: 100%;
  min-height: 7rem;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid var(--border);
  border-radius: 0;
  color: inherit;
  padding: 0.75rem;
}

.sketch-shell {
  border: 1px solid var(--border);
  border-radius: 0;
  padding: 0.5rem;
  background: rgba(0, 0, 0, 0.25);
  margin-bottom: 1rem;
}

.sketch-host {
  width: 100%;
  height: 360px;
}

iframe {
  width: 100%;
  border: none;
  min-height: 500px;
}

.note {
  color: #a0a0a0;
  font-size: 0.9rem;
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
}

.controls-grid label {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  font-size: 0.85rem;
}

.controls-grid input {
  padding: 0.35rem 0.5rem;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border);
  border-radius: 0;
  color: inherit;
}

footer {
  text-align: center;
  padding: 1rem;
  font-size: 0.85rem;
  color: #a0a0a0;
}

button.clear-btn {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
  border-radius: 0;
  padding: 0.4rem 0.9rem;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.2s ease;
}

button.clear-btn:hover {
  background: rgba(244, 140, 6, 0.15);
}

@media (max-width: 640px) {
  .sketch-host {
    height: 260px;
  }
}