:root {
  --bg: #0a0a0a;
  --bg2: #111111;
  --border: #1e1e1e;
  --green: #00ff41;
  --green-dim: #00a828;
  --gray: #555;
  --text: #cdd6f4;
  --text-dim: #6c7086;
  --prompt: #00ff41;
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Courier New', Courier, monospace;
  font-size: 14px;
  line-height: 1.6;
  min-height: 100vh;
}

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

a:hover {
  text-decoration: underline;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1.5rem;
}

header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.5rem;
  margin-bottom: 2rem;
}

.prompt-line {
  color: var(--text-dim);
  font-size: 12px;
  margin-bottom: 0.5rem;
}

.prompt-line span {
  color: var(--green);
}

h1 {
  color: var(--green);
  font-size: 1.4rem;
  font-weight: normal;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

h1::before {
  content: '>> ';
  color: var(--green-dim);
}

.subtitle {
  color: var(--text-dim);
  font-size: 12px;
  margin-top: 0.4rem;
}

.section-label {
  color: var(--text-dim);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
}

#materi-list {
  list-style: none;
}

#materi-list li {
  border-bottom: 1px solid var(--border);
}

#materi-list a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0.5rem;
  color: var(--text);
  transition: background 0.1s;
}

#materi-list a:hover {
  background: var(--bg2);
  text-decoration: none;
  color: var(--green);
}

#materi-list a::before {
  content: '[>]';
  color: var(--green-dim);
  font-size: 12px;
  flex-shrink: 0;
}

.item-num {
  color: var(--text-dim);
  font-size: 12px;
  min-width: 2.5rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-dim);
  font-size: 12px;
  margin-bottom: 1.5rem;
}

.back-link:hover {
  color: var(--green);
  text-decoration: none;
}

.back-link::before {
  content: '<';
  color: var(--green);
}

#detail-title {
  color: var(--green);
  font-size: 1.2rem;
  font-weight: normal;
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}

#detail-title::before {
  content: '# ';
  color: var(--green-dim);
}

.block {
  margin-bottom: 2rem;
}

.block-label {
  color: var(--text-dim);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  margin-bottom: 0.75rem;
}

.block-label::before {
  content: '│ ';
  color: var(--green-dim);
}

#detail-penjelasan {
  color: var(--text);
  line-height: 1.8;
  padding-left: 1rem;
  border-left: 2px solid var(--border);
}

#detail-gambar {
  display: block;
  width: 100%;
  max-width: 100%;
  border: 1px solid var(--border);
  filter: brightness(0.9);
}

#detail-gambar:hover {
  filter: brightness(1);
}

.video-wrap {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border: 1px solid var(--border);
}

.video-wrap iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

footer {
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 11px;
  text-align: center;
}

.msg {
  color: var(--text-dim);
  padding: 1rem 0;
}

.msg.err {
  color: #f38ba8;
}