:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #14141f;
  --bg-tertiary: #1e1e2e;
  --text-primary: #ffffff;
  --text-secondary: #a0a0b0;
  --text-muted: #606070;
  --accent: #00d4ff;
  --accent-secondary: #00ff88;
  --danger: #ff4466;
  --focus-ring: #00d4ff;
  --focus-glow: rgba(0, 212, 255, 0.4);
  --radius-md: 12px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
  width: 600px; height: 600px; overflow: hidden;
  background: #000;
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}
#app { width: 100%; height: 100%; position: relative; }
.screen { width: 100%; height: 100%; position: absolute; top: 0; left: 0; display: flex; flex-direction: column; }
.screen.hidden { display: none; }
.focusable { transition: all 0.15s ease; border: 2px solid transparent; cursor: pointer; outline: none; }
.focusable:focus { border-color: var(--focus-ring); box-shadow: 0 0 20px var(--focus-glow); }
.hidden { display: none !important; }

/* ---------- Header ---------- */
.app-header {
  padding: 22px 24px 14px;
  border-bottom: 1px solid #23233a;
  background: var(--bg-primary);
  flex: 0 0 auto;
}
.app-header h1 { font-size: 30px; font-weight: 700; letter-spacing: 0.5px; }
.subtitle { color: var(--text-secondary); font-size: 15px; margin-top: 2px; }

/* ---------- Home list ---------- */
.list {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.verb-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: left;
  width: 100%;
  min-height: 60px;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 2px solid transparent;
  border-left: 5px solid var(--vc, var(--accent));
}
.vc-method {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 19px;
  font-weight: 700;
  color: var(--vc, var(--text-primary));
  letter-spacing: 0.5px;
}
.vc-sum { color: var(--text-secondary); font-size: 14px; }
.vdot {
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--vc, var(--accent));
  box-shadow: 0 0 10px var(--vc, var(--accent));
  flex: 0 0 auto;
}
.glossary-card { border-left-color: var(--text-muted); }
.glossary-card .vc-method { color: var(--text-primary); }

.hint {
  flex: 0 0 auto;
  padding: 9px 0;
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  background: var(--bg-primary);
  border-top: 1px solid #23233a;
}

/* ---------- Detail ---------- */
.detail-body {
  flex: 1 1 auto;
  overflow: hidden;
  padding: 20px 24px 6px;
}
.vhead { display: flex; align-items: center; gap: 14px; }
.vhead .vdot { width: 18px; height: 18px; }
.vname {
  font-size: 38px; font-weight: 800; letter-spacing: 1px;
  color: var(--vc, var(--text-primary));
}
.vsummary {
  margin-top: 10px;
  font-size: 16px;
  line-height: 1.45;
  color: var(--text-secondary);
}
.badges {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 9px;
  margin-top: 16px;
}
.badge {
  display: flex; align-items: center; gap: 9px;
  padding: 10px 13px;
  border-radius: 10px;
  background: var(--bg-secondary);
  font-size: 15px; font-weight: 600;
}
.badge .bdot {
  width: 13px; height: 13px; border-radius: 50%;
  flex: 0 0 auto;
}
.badge.on { color: var(--text-primary); }
.badge.on .bdot { background: var(--accent-secondary); box-shadow: 0 0 8px var(--accent-secondary); }
.badge.off { color: var(--text-muted); }
.badge.off .bdot { background: #33333f; border: 1px solid #4a4a5a; }

.section-label {
  margin-top: 18px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.2px;
  text-transform: uppercase;
  color: var(--text-muted);
}
.codes { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 7px; }
.code {
  padding: 6px 10px;
  border-radius: 8px;
  background: var(--bg-tertiary);
  font-size: 13px;
  color: var(--text-secondary);
}
.code b { color: var(--accent); font-weight: 700; }
.example {
  margin-top: 8px;
  padding: 12px 14px;
  border-radius: 10px;
  background: #0c0c14;
  border: 1px solid #23233a;
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  font-size: 13px;
  line-height: 1.5;
  color: #cdd2e0;
  white-space: pre;
  overflow: hidden;
}

/* ---------- Glossary ---------- */
.gloss-body {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: 16px 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.gloss-item {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border-left: 4px solid var(--accent);
}
.gloss-term { font-size: 18px; font-weight: 700; color: var(--text-primary); }
.gloss-def { margin-top: 5px; font-size: 14px; line-height: 1.45; color: var(--text-secondary); }

/* ---------- Nav bar ---------- */
.navbar {
  flex: 0 0 auto;
  display: flex;
  gap: 10px;
  padding: 12px 18px 16px;
  background: var(--bg-primary);
  border-top: 1px solid #23233a;
}
.navbtn {
  flex: 1 1 0;
  min-height: 56px;
  border-radius: var(--radius-md);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 600;
}
.navbtn.wide { flex: 1 1 100%; }