:root {
  --bg: #12161d;
  --panel: #1b212a;
  --panel-line: #2f3947;
  --gold: #d9a35c;
  --teal: #4a7fa3;
  --terracotta: #a15c46;
  --text: #e6e4dc;
  --text-muted: #7c8794;
  --red-soft: #b2554a;
  --green-soft: #6a9c78;
}

*{ 
  box-sizing: border-box; 
}

body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'DM Sans', sans-serif;
  min-height: 100vh;
  padding: clamp(20px, 6vw, 48px) clamp(14px, 4vw, 24px) clamp(40px, 8vw, 80px);
}

.wrap{
  max-width: 1080px;
  margin: 0 auto;
}

header.page-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 12px;
  border-bottom: 1px solid var(--panel-line);
  padding-bottom: 16px;
  margin-bottom: clamp(24px, 6vw, 40px);
}

 header.page-head h1 {
  font-family: 'DM Serif Display', serif;
  font-weight: 400;
  font-size: clamp(24px, 3.4vw, 36px);
  margin: 0;
  letter-spacing: 0.3px;
}

  header.page-head .subtitle {
    font-family: 'DM Mono', monospace;
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 1.5px;
    text-transform: uppercase;
  }

  .stage {
    display: grid;
    grid-template-columns: minmax(280px, 400px) 1fr;
    gap: clamp(24px, 4vw, 40px);
    align-items: start;
  }

  @media (max-width: 900px) {
    .stage { grid-template-columns: 1fr; }
  }


  .controls-col {
    display: flex;
    flex-direction: column;
    gap: 22px;
  }

  .control-block {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }

  .control-label {
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: var(--text-muted);
  }

  .chip-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .option-chip {
    font-family: 'DM Sans', sans-serif;
    font-size: 13px;
    padding: 9px 14px;
    border-radius: 10px;
    border: 1px solid var(--panel-line);
    background: var(--panel);
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
    line-height: 1.2;
    min-height: 44px;
    justify-content: center;
    flex: 1 1 auto;
    -webkit-tap-highlight-color: transparent;
  }

  .option-sub {
    font-family: 'DM Mono', monospace;
    font-size: 10px;
    color: var(--text-muted);
    opacity: 0.75;
  }

  .option-chip:hover { 
    border-color: var(--gold); 
    color: var(--text); 
  }

  .option-chip.active {
    background: var(--teal);
    border-color: var(--teal);
    color: #0c211f;
  }

  .option-chip.active .option-sub { 
    color: #0c211f; 
    opacity: 0.7; 
  }

  .preset-block {
    margin-top: 4px;
    padding-top: 18px;
    border-top: 1px solid var(--panel-line);
  }

  .preset-chip {
    font-family: 'DM Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.5px;
    padding: 9px 16px;
    border-radius: 999px;
    border: 1px solid var(--panel-line);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s ease;
  }

  .preset-chip:hover { 
    border-color: var(--gold); 
    color: var(--text); 
  }

  .preset-chip.active {
    background: var(--terracotta);
    border-color: var(--terracotta);
    color: #241108;
  }

  .rotation-label {
    display: flex;
    justify-content: space-between;
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    letter-spacing: 1px;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 8px;
  }

  .rotation-label .value { color: var(--teal); }

  input[type="range"] {
    width: 100%;
    height: 2px;
    background: var(--panel-line);
    border-radius: 2px;
  }

  input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--teal);
    cursor: pointer;
    box-shadow: 0 0 0 4px rgba(79,166,160,0.15);
  }

  .readout {
    background: var(--panel);
    border: 1px solid var(--panel-line);
    border-radius: 10px;
    padding: clamp(20px, 5vw, 30px) clamp(18px, 5vw, 32px);
  }

  .readout-kicker {
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--text-muted);
    margin: 0 0 20px;
  }

  .field-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px 24px;
  }

  @media (max-width: 420px) {
    .field-grid { grid-template-columns: 1fr; gap: 14px; }
  }

  .field {
    border-top: 1px solid var(--panel-line);
    padding-top: 8px;
  }

  .field .label {
    font-family: 'DM Mono', monospace;
    font-size: 10px;
    letter-spacing: 1.2px;
    text-transform: uppercase;
    color: var(--text-muted);
    display: block;
    margin-bottom: 6px;
  }

  .field .value {
    font-size: 14px;
    color: var(--text);
  }

  .tag {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-family: 'DM Mono', monospace;
    font-size: 12px;
    letter-spacing: 0.4px;
  }

  .energy-high, .transport-limited { 
    background: rgba(196,98,61,0.18); 
    color: var(--terracotta); 
  }
  .energy-moderate, .transport-moderate { 
    background: rgba(201,161,107,0.18); 
    color: var(--gold); 
  }
  .energy-low, .transport-extensive { 
    background: rgba(79,166,160,0.18); 
    color: var(--teal); 
  }

  .reservoir-good { 
    background: rgba(90,156,106,0.18);
     color: var(--green-soft); 
    }
  .reservoir-moderate { 
    background: rgba(201,161,107,0.18); 
    color: var(--gold); 
  }
  .reservoir-poor { 
    background: rgba(178,90,79,0.18); 
    color: var(--red-soft); 
  }

  .divider {
    height: 1px;
    background: var(--panel-line);
    margin: 26px 0 22px;
  }

  .settings-title {
    font-family: 'DM Serif Display', serif;
    font-weight: 400;
    font-size: 19px;
    margin: 0 0 14px;
  }

  .settings-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
  }

  .setting-pill {
    font-family: 'DM Mono', monospace;
    font-size: 12px;
    padding: 7px 14px;
    border-radius: 999px;
    border: 1px solid var(--gold);
    color: var(--gold);
    background: rgba(201,161,107,0.08);
  }

  .readout .desc {
    font-size: 14px;
    line-height: 1.65;
    color: var(--text);
    opacity: 0.85;
    margin: 0 0 12px;
  }

  .reservoir-note {
    opacity: 0.7;
    font-style: italic;
  }

  footer.note {
    margin-top: clamp(28px, 6vw, 48px);
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    text-align: center;
    line-height: 1.6;
    padding: 0 4px;
  }

  @media (max-width: 600px) {
    header.page-head {
      flex-direction: column;
      align-items: flex-start;
    }

    header.page-head .subtitle {
      font-size: 10.5px;
      letter-spacing: 1.2px;
    }

    .chip-group { gap: 6px; }

    .option-chip {
      font-size: 12.5px;
      padding: 9px 12px;
    }

    .settings-list { gap: 6px; }

    .setting-pill {
      font-size: 11px;
      padding: 6px 12px;
    }

    .field .value { font-size: 13px; }

    .settings-title { font-size: 17px; }
  }

  @media (max-width: 380px) {
    .chip-group {
      flex-direction: column;
    }

    .option-chip {
      width: 100%;
      align-items: flex-start;
    }
  }