/* ===== design tokens (shared by every tool) ===== */
:root{
  --bg: #12140f;
  --panel: #1b1f16;
  --panel-line: #2c3324;
  --pcb: #23291c;
  --copper: #c9863f;
  --copper-light: #f0b876;
  --cream: #eee6d6;
  --muted: #8d9581;
  --lcd-bg: #0a150c;
  --lcd-text: #78e07f;
  --lcd-dim: #2f6a38;
  --font-mono: 'IBM Plex Mono', monospace;
  --font-sans: 'IBM Plex Sans JP', sans-serif;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:
    radial-gradient(1200px 600px at 15% -10%, #1c2216 0%, transparent 60%),
    var(--bg);
  color:var(--cream);
  font-family:var(--font-sans);
  min-height:100vh;
  padding:28px 20px 60px;
}
.wrap{
  max-width:1180px;
  margin:0 auto;
}

/* ===== top bar (tabs + lang switcher) ===== */
.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}
.top-bar .tabs {
  margin-bottom: 0;
}

/* ===== header ===== */
header.hero{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
  border-bottom:1px solid var(--panel-line);
  padding-bottom:16px;
  margin-bottom:20px;
}
header.hero h1{
  font-family:var(--font-mono);
  font-weight:700;
  font-size:26px;
  letter-spacing:0.5px;
  margin:0;
  color:var(--cream);
}
header.hero h1 span{color:var(--copper-light);}
header.hero p{
  margin:4px 0 0;
  color:var(--muted);
  font-size:13px;
  font-family:var(--font-mono);
}

/* ===== tab bar (switches between tools) ===== */
.tabs{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.tabs button{
  font-family:var(--font-mono);
  font-size:13px;
  padding:9px 16px;
  border:1px solid var(--panel-line);
  border-radius:8px;
  background:var(--panel);
  color:var(--muted);
  cursor:pointer;
  transition:all .15s ease;
}
.tabs button:hover{ color:var(--cream); border-color:var(--copper); }
.tabs button.active{
  background:var(--copper);
  color:#1a1305;
  font-weight:600;
  border-color:var(--copper);
}

/* ===== language switch button (top right) ===== */
.lang-switch {
  display: inline-flex;
  background: var(--panel);
  border: 1px solid var(--panel-line);
  border-radius: 8px;
  padding: 3px;
  margin-left: auto;
}
.lang-switch button {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 6px 12px;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: all .15s ease;
}
.lang-switch button:hover {
  color: var(--cream);
}
.lang-switch button.active {
  background: var(--copper);
  color: #1a1305;
  font-weight: 600;
}

/* ===== generic reusable pieces every tool can use ===== */
.toggle{
  display:inline-flex;
  background:var(--panel);
  border:1px solid var(--panel-line);
  border-radius:8px;
  padding:3px;
}
.toggle button{
  font-family:var(--font-mono);
  font-size:13px;
  padding:7px 16px;
  border:none;
  border-radius:6px;
  background:transparent;
  color:var(--muted);
  cursor:pointer;
  transition:all .15s ease;
}
.toggle button.active{
  background:var(--copper);
  color:#1a1305;
  font-weight:600;
}

.panel{
  background:var(--panel);
  border:1px solid var(--panel-line);
  border-radius:14px;
  padding:18px;
}

#toolContainer{
  display:flex;
  flex-direction:column;
  gap:20px;
}

/* ===== global footer ===== */
.app-footer {
  margin-top: 36px;
  padding-top: 18px;
  border-top: 1px solid var(--panel-line);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  text-align: center;
}
.app-footer a {
  color: var(--copper-light);
  text-decoration: none;
}
.app-footer a:hover {
  text-decoration: underline;
}

@media (max-width: 860px){
  .tabs{ gap:6px; }
  .top-bar{ flex-direction: row; }
}