:root {
  --Top_Bar_Height: 56px;

  --Border: #e6e6e6;
  --Text: #111;
  --Muted: #666;
  --Error: #b00020;
  --Focus: #1a73e8;

  --Input_Border: #202124;
  --Required_Green: #2e7d32;
  --Required_Bg: rgba(46, 125, 50, 0.10);

  --Card: #fff;
  --Page: #fff;
  --Input_Bg: #fff;

  --Shadow: 0 10px 25px rgba(0,0,0,0.06);
  --Radius: 14px;

  --Top_Bar_Bg: #fff;
  --Top_Button_Bg: #fff;

  --Primary_Bg: #111;
  --Primary_Text: #fff;

  --Tooltip_Bg: #111;
  --Tooltip_Text: #fff;
  --Tooltip_Border: rgba(255,255,255,0.18);
}

html[data-theme="dark"] {
  --Border: #39414d;
  --Text: #eef2f7;
  --Muted: #c2c9d4;
  --Error: #ff6b86;
  --Focus: #86b4ff;

  --Input_Border: #607089;
  --Required_Green: #4caf50;
  --Required_Bg: rgba(76, 175, 80, 0.16);

  --Page: #161a20;
  --Card: #222833;
  --Input_Bg: #2a3240;

  --Shadow: 0 14px 34px rgba(0,0,0,0.35);

  --Top_Bar_Bg: #1b2028;
  --Top_Button_Bg: #222833;

  --Primary_Bg: #eef2f7;
  --Primary_Text: #0b0f14;

  --Tooltip_Bg: #eef2f7;
  --Tooltip_Text: #0b0f14;
  --Tooltip_Border: rgba(0,0,0,0.18);
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--Page);
  color: var(--Text);
}

.Top_Bar {
  height: var(--Top_Bar_Height);
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--Top_Bar_Bg);
  border-bottom: 1px solid var(--Border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 18px;
}

.Top_Bar_Title {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.Top_Bar_Right {
  display: flex;
  gap: 10px;
  align-items: center;
}

:root {
  --Accent_Blue: #1a73e8;
}

.Top_Button.Help_Button {
  background: #fff;
  color: #111;
}

.Top_Button.Help_Button.Active {
  background: var(--Accent_Blue);
  border-color: var(--Accent_Blue);
  color: #fff;
}

.Top_Button {
  height: 38px;
  padding: 0 12px;
  border-radius: 12px;
  border: 1px solid var(--Border);
  background: var(--Top_Button_Bg);
  color: var(--Text);
  cursor: pointer;
  font-size: 13px;
}

.Top_Button.Active {
  border-color: var(--Focus);
  box-shadow: 0 0 0 3px rgba(26,115,232,0.15);
}

.Page_Wrap {
  width: 100%;
  min-height: calc(100vh - var(--Top_Bar_Height));
}

.Content_Wrap {
  padding: 18px;
  min-height: calc(100vh - var(--Top_Bar_Height));
}

.Layout {
  width: 100%;
  height: calc(100vh - var(--Top_Bar_Height) - 36px);
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
  align-items: stretch;
}

.Card {
  background: var(--Card);
  border: 1px solid var(--Border);
  border-radius: var(--Radius);
  box-shadow: var(--Shadow);
  overflow: hidden;
}

.Card_Input,
.Card_Results {
  height: 100%;
  display: flex;
  flex-direction: column;
}

.Card_Header {
  padding: 16px 16px 0 16px;
}

.Title {
  margin: 0;
  font-size: 18px;
  letter-spacing: 0.2px;
}

.Form {
  padding: 16px;
  overflow: auto;
}

.Top_Row {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr 1fr;
  margin-bottom: 12px;
  align-items: start;
}

.Top_Row .Hint {
  min-height: 16px;
}

.Grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.Field {
  display: grid;
  gap: 6px;
}

.Label {
  font-size: 13px;
  color: var(--Text);
}

.Input_Row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: center;
}

.Input {
  width: 100%;
  height: 42px;
  border: 1px solid var(--Input_Border);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
  outline: none;
  background: var(--Input_Bg);
  color: var(--Text);
}

select.Input {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
}

.Select_Small {
  width: 165px;
}

.Unit_Badge {
  width: 165px;
  height: 42px;
  border: 1px solid var(--Input_Border);
  border-radius: 10px;
  padding: 10px 12px;
  font-size: 14px;
  color: var(--Muted);
  text-align: center;
  background: var(--Input_Bg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.Input:focus {
  border-color: var(--Focus);
  box-shadow: 0 0 0 3px rgba(26,115,232,0.15);
}

.Input.Required:not(.Invalid) {
  background: var(--Required_Bg);
}

.Input.Invalid {
  border-color: var(--Error);
  box-shadow: 0 0 0 3px rgba(176,0,32,0.10);
}

.Hint {
  color: transparent;
  font-size: 12px;
  line-height: 1.35;
}

.Error {
  min-height: 16px;
  color: var(--Error);
  font-size: 12px;
}

.Actions {
  margin-top: 14px;
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.Button {
  height: 42px;
  border: 1px solid var(--Border);
  background: var(--Primary_Bg);
  color: var(--Primary_Text);
  border-radius: 12px;
  padding: 0 14px;
  font-size: 14px;
  cursor: pointer;
}

.Button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.Status {
  font-size: 13px;
  color: var(--Muted);
  min-height: 18px;
}

.Results {
  padding: 16px;
  display: grid;
  gap: 14px;
  overflow: auto;
}

.Result_Row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  border: 1px solid var(--Border);
  border-radius: 12px;
  padding: 16px;
  background: transparent;
}

.Result_Row:hover {
  border-color: var(--Focus);
}

.Result_Key {
  color: var(--Muted);
  font-size: 13px;
}

.Result_Value {
  text-align: right;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

.Result_Key,
.Result_Value {
  line-height: 1.35;
}

.Badge_Warn {
  display: inline-block;
  border: 1px solid var(--Border);
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 12px;
  color: var(--Text);
  background: transparent;
}

.Tooltip {
  position: fixed;
  z-index: 9999;
  max-width: 420px;
  border-radius: 12px;
  padding: 10px 12px;
  background: var(--Tooltip_Bg);
  color: var(--Tooltip_Text);
  border: 1px solid var(--Tooltip_Border);
  box-shadow: 0 14px 30px rgba(0,0,0,0.25);
  pointer-events: none;
}

.Tooltip.Hidden {
  display: none;
}

.Tooltip_Title {
  font-size: 13px;
  font-weight: 650;
  margin: 0 0 6px 0;
}

.Tooltip_Text {
  font-size: 12px;
  line-height: 1.35;
  white-space: pre-line;
}

@media (max-width: 980px) {
  .Layout {
    height: auto;
    grid-template-columns: 1fr;
  }
  .Card_Input,
  .Card_Results {
    height: auto;
  }
}

@media (max-width: 760px) {
  .Top_Row {
    grid-template-columns: 1fr;
  }
  .Grid {
    grid-template-columns: 1fr;
  }
  .Result_Row {
    grid-template-columns: 1fr;
  }
  .Result_Value {
    text-align: left;
  }
  .Select_Small, .Unit_Badge {
    width: 150px;
  }
}