:root {
  --bg-dark: #0a0f16;
  --bg-panel: #0f1620;
  --bg-card: #131c27;
  --bg-input: #0b1119;
  --border: #223142;
  --border-active: #355b7a;
  --text: #e9eef5;
  --text-dim: #88a0b5;
  --text-label: #6f869a;
  --accent: #00d6a2;
  --accent-soft: rgba(0, 214, 162, 0.15);
  --warn: #ffc857;
  --danger: #ff5d5d;
  --ok: #00d68f;
  --blue: #00aaff;
  --orange: #ff8855;
  --cyan: #00e5ff;
  --amber: #ffc857;
  --red: #ff5d5d;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; margin: 0; }
body {
  font-family: "Rajdhani", sans-serif;
  background: radial-gradient(circle at 75% 0%, rgba(0, 214, 162, 0.09), transparent 30%), var(--bg-dark);
  color: var(--text);
  line-height: 1.4;
}
button, input, select { font: inherit; }
.grid-bg {
  position: fixed;
  inset: 0;
  background-image: linear-gradient(rgba(0, 214, 162, 0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(0, 214, 162, 0.035) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}
.app { position: relative; z-index: 1; min-height: 100vh; }
.header {
  display: grid;
  grid-template-columns: minmax(270px, 1fr) auto auto;
  gap: 18px;
  align-items: center;
  padding: 18px 24px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(0, 214, 162, 0.05), rgba(10, 15, 22, 0.78));
  backdrop-filter: blur(10px);
}
.logo { display: flex; align-items: center; gap: 14px; }
.logo-icon { width: 46px; height: 46px; color: var(--accent); filter: drop-shadow(0 0 10px var(--accent-soft)); }
.logo-title { font-size: 30px; font-weight: 700; letter-spacing: 0.16em; color: var(--accent); text-shadow: 0 0 18px var(--accent-soft); }
.logo-sub { margin-top: -3px; font-size: 11px; letter-spacing: 0.27em; color: var(--text-dim); }
.header-actions, .header-badges { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.btn-header, .badge, .quick-adds button, .btn-line, .remove-row {
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-dim);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  transition: border-color .2s, color .2s, transform .2s, background .2s;
}
.btn-header { padding: 8px 12px; font-size: 12px; font-weight: 700; }
.btn-header:hover, .quick-adds button:hover, .btn-line:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); }
.btn-header.ghost { color: var(--warn); }
.badge { display: inline-flex; align-items: center; gap: 8px; padding: 8px 12px; font-size: 11px; font-weight: 700; }
.badge-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px var(--accent); }
.badge-dot.warn { background: var(--warn); box-shadow: 0 0 8px var(--warn); }
.badge-dot.orange { background: var(--orange); box-shadow: 0 0 8px var(--orange); }
.badge-dot.cyan { background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }
.main {
  display: grid;
  grid-template-columns: minmax(380px, 0.95fr) minmax(420px, 1.05fr);
  gap: 22px;
  padding: 22px;
  max-width: 1560px;
  margin: 0 auto;
}
.inputs-panel, .results-panel { display: flex; flex-direction: column; gap: 16px; }
.input-card, .result-card {
  background: linear-gradient(180deg, rgba(255,255,255,0.015), transparent), var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.24);
  overflow: hidden;
}
.input-card { border-left-width: 4px; }
.accent-amber { border-left-color: var(--amber); }
.accent-blue { border-left-color: var(--blue); }
.accent-orange { border-left-color: var(--orange); }
.accent-red { border-left-color: var(--red); }
.accent-cyan { border-left-color: var(--cyan); }
summary, .card-heading {
  list-style: none;
  padding: 15px 18px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
}
summary::-webkit-details-marker { display: none; }
summary span { color: var(--text-label); font-family: "JetBrains Mono", monospace; margin-right: 10px; }
.card-body { padding: 16px; display: grid; gap: 14px; }
.two-up { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.full { grid-column: 1 / -1; }
.field { position: relative; display: grid; gap: 7px; color: var(--text-label); font-size: 12px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; }
.field input, .field select {
  width: 100%;
  padding: 12px 56px 12px 12px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: "JetBrains Mono", monospace;
  outline: none;
}
.field select { padding-right: 12px; }
.field input:focus, .field select:focus { border-color: var(--border-active); box-shadow: 0 0 0 3px rgba(0, 214, 162, 0.08); }
.field span { position: absolute; right: 11px; bottom: 11px; color: var(--text-label); font-size: 11px; font-family: "JetBrains Mono", monospace; text-transform: none; letter-spacing: 0; }
.check-row { display: flex; gap: 9px; align-items: center; color: var(--text-dim); font-weight: 600; }
.note { margin: 0; color: var(--text-dim); font-size: 13px; }
.note.warn { color: var(--warn); }
.hidden { display: none !important; }
.quick-adds { display: flex; flex-wrap: wrap; gap: 8px; }
.quick-adds button { padding: 7px 9px; font-size: 11px; }
.appliance-rows { display: grid; gap: 9px; }
.appliance-row { display: grid; grid-template-columns: 1.2fr .8fr .55fr 34px; gap: 8px; align-items: end; }
.appliance-row label { color: var(--text-label); font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.appliance-row input { width: 100%; margin-top: 5px; padding: 10px; background: var(--bg-input); border: 1px solid var(--border); color: var(--text); font-family: "JetBrains Mono", monospace; }
.remove-row { height: 38px; color: var(--danger); }
.btn-line { justify-self: start; padding: 10px 12px; font-size: 12px; font-weight: 700; }
.hero { padding-bottom: 18px; }
.meters { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; padding: 18px; }
.meters div { padding: 15px; background: var(--bg-input); border: 1px solid var(--border); min-height: 92px; }
.meters span { display: block; color: var(--text-label); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; font-weight: 700; }
.meters strong { display: block; margin-top: 12px; color: var(--accent); font-family: "JetBrains Mono", monospace; font-size: clamp(24px, 3.2vw, 36px); line-height: 1; }
.service-badge { color: var(--warn) !important; }
.reference-block { margin: 0 18px; padding: 14px; border: 1px solid rgba(0, 214, 162, 0.22); background: var(--accent-soft); color: var(--text-dim); font-size: 13px; }
.breakdown-card summary { cursor: pointer; }
.table-wrap { overflow-x: auto; padding: 0 0 8px; }
table { width: 100%; border-collapse: collapse; min-width: 760px; }
th, td { padding: 12px 14px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
th { color: var(--text-label); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; background: rgba(0, 0, 0, 0.16); }
td { color: var(--text-dim); font-size: 13px; }
td:nth-child(2), td:nth-child(4) { font-family: "JetBrains Mono", monospace; color: var(--text); white-space: nowrap; }
td:nth-child(3) { color: var(--accent); }
tr.total-row td { color: var(--text); font-weight: 700; background: rgba(0, 214, 162, 0.06); }
@media (max-width: 980px) {
  .header { grid-template-columns: 1fr; }
  .main { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .main { padding: 12px; }
  .logo-title { font-size: 24px; }
  .two-up, .meters, .appliance-row { grid-template-columns: 1fr; }
  .remove-row { width: 100%; }
}
@media print {
  body { background: #fff; color: #000; }
  .grid-bg, .header-actions, .inputs-panel { display: none; }
  .main { display: block; padding: 0; }
  .result-card { box-shadow: none; border-color: #999; }
}