:root {
  --ink: #0d0d0d;
  --paper: #f5f2ec;
  --accent: #c0392b;
  --accent-light: #e8d5d3;
  --safe: #1a5c38;
  --safe-light: #d3e8dc;
  --border: #c8c2b5;
  --muted: #7a7468;
  --mono: 'IBM Plex Mono', monospace;
  --serif: 'Playfair Display', Georgia, serif;
  --sans: 'IBM Plex Sans', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.25;
  pointer-events: none;
  z-index: 0;
}

.container {
  position: relative;
  z-index: 1;
  max-width: 1400px;
  margin: 0 auto;
  padding: 48px 32px 80px;
}

/* ─── HEADER ─── */
.header {
  margin-bottom: 32px;
  padding-bottom: 28px;
  border-bottom: 2px solid var(--ink);
}
.header-accent {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.25em;
  color: var(--accent);
  margin-bottom: 10px;
  font-weight: 500;
}
.header-title {
  font-family: var(--serif);
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}
.header-sub {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.05em;
}

/* ─── HORIZONTAL ROW: group-card + params-card ─── */
.cards-row {
  display: flex;
  align-items: stretch;
  gap: 10px;
  margin-bottom: 16px;
}

/* ─── CARDS ─── */
.card {
  background: #fff;
  border: 1.5px solid var(--border);
  padding: 24px 28px;
  position: relative;
  transition: box-shadow 0.2s;
}
.card + .card { border-left: none; }

.card-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 18px;
}

/* group-card: fixed width, vertical radio list */
.group-card {
  display: flex;
  flex-direction: column;
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.radio-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  cursor: pointer;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  transition: all 0.15s;
  user-select: none;
}
.radio-item:hover {
  border-color: var(--ink);
  background: var(--paper);
}
.radio-item input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.radio-box {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 3px;
  position: relative;
  transition: border-color 0.15s;
}
.radio-box::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0;
  transform: scale(0);
  transition: all 0.15s;
}
.radio-item input[type="radio"]:checked ~ .radio-box { border-color: var(--accent); }
.radio-item input[type="radio"]:checked ~ .radio-box::after { opacity: 1; transform: scale(1); }
.radio-item input[type="radio"]:checked ~ .radio-text strong { color: var(--accent); }

.radio-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.radio-text strong {
  font-family: var(--serif);
  font-size: 0.95rem;
  font-weight: 600;
  transition: color 0.15s;
}
.radio-text em {
  font-style: normal;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* params-card: takes remaining space */
.params-card {
  flex: 1 1 0;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.params-placeholder {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 32px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  gap: 12px;
  text-align: center;
  grid-column: span 3;
}
.placeholder-icon { font-size: 2rem; opacity: 0.4; }

/* ─── PARAMS GRID — 3 columns, subgrid rows ─── */
/*
  Outer grid: 3 columns × repeating groups of 3 rows.
  Each param-field/checkbox-field spans 3 rows with subgrid,
  so row 1 = labels, row 2 = meta, row 3 = inputs — all aligned.
*/
.params-grid {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  /* No fixed row heights — subgrid lets each "band" of 3 rows
     size itself to the tallest cell in that band */
  grid-auto-rows: auto;
  column-gap: 16px;
  row-gap: 0;
}

/* Each field occupies 3 consecutive row tracks and uses subgrid */
.param-field,
.checkbox-field {
  display: grid;
  grid-column: span 1;
  grid-row: span 3;
  grid-template-rows: subgrid;
  animation: fadeSlide 0.25s ease both;
}

@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Row 1: name label */
.param-label {
  padding: 12px 0 4px;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 500;
  color: var(--ink);
  line-height: 1.35;
  align-self: end;    /* push to bottom of row so all labels bottom-align */
}

/* Row 2: threshold + coef */
.param-meta {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 4px 0 6px;
}
.param-threshold {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 0.04em;
}
.param-coef {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--muted);
}

/* Row 3: the actual input / checkbox — all on the same line */
.param-input {
  height: 36px;
  width: 100%;
  padding: 0 10px;
  border: 1.5px solid var(--border);
  background: var(--paper);
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink);
  outline: none;
  transition: border-color 0.15s, background 0.15s;
  -moz-appearance: textfield;
  appearance: textfield;
  align-self: start;
  margin-bottom: 16px;
}
.param-input::-webkit-inner-spin-button,
.param-input::-webkit-outer-spin-button { -webkit-appearance: none; }
.param-input:focus { border-color: var(--ink); background: #fff; }
.param-input.hit { border-color: var(--accent); background: var(--accent-light); }

.checkbox-wrapper {
  height: 36px;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  padding: 0 10px;
  border: 1.5px solid var(--border);
  background: var(--paper);
  transition: all 0.15s;
  user-select: none;
  align-self: start;
  margin-bottom: 16px;
}
.checkbox-wrapper:hover { border-color: var(--ink); }
.checkbox-wrapper input[type="checkbox"] {
  width: 15px;
  height: 15px;
  accent-color: var(--accent);
  cursor: pointer;
  flex-shrink: 0;
}
.checkbox-wrapper span {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink);
}
.checkbox-wrapper.checked {
  border-color: var(--accent);
  background: var(--accent-light);
}

/* ─── ACTION ROW ─── */
.action-row {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 16px;
}
.calc-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 32px;
  background: var(--ink);
  color: #fff;
  border: none;
  cursor: pointer;
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.03em;
  transition: all 0.15s;
  position: relative;
  overflow: hidden;
}
.calc-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent);
  transform: translateX(-100%);
  transition: transform 0.25s ease;
}
.calc-btn:hover::before { transform: translateX(0); }
.calc-btn:hover { box-shadow: 4px 4px 0 var(--accent); }
.calc-btn-text, .calc-btn-arrow { position: relative; z-index: 1; }
.calc-btn-arrow { font-size: 18px; transition: transform 0.2s; }
.calc-btn:hover .calc-btn-arrow { transform: translateX(4px); }

/* ─── RESULT ─── */
.result-card {
  border: 2px solid var(--ink);
  padding: 28px 32px;
  animation: fadeSlide 0.3s ease;
}
.result-card.risk {
  border-color: var(--accent);
  background: linear-gradient(135deg, #fff 0%, var(--accent-light) 100%);
}
.result-card.safe {
  border-color: var(--safe);
  background: linear-gradient(135deg, #fff 0%, var(--safe-light) 100%);
}
.result-inner { display: flex; flex-direction: column; gap: 8px; }
.result-icon { font-size: 1.8rem; }
.result-label {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1.2;
}
.result-card.risk .result-label { color: var(--accent); }
.result-card.safe .result-label { color: var(--safe); }
.result-score {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
}

/* ─── RESPONSIVE ─── */
@media (max-width: 768px) {
  .cards-row { flex-direction: column; }
  .card + .card { border-left: 1.5px solid var(--border); border-top: none; }
  .group-card { flex: none; }
  .radio-group { flex-direction: row; flex-wrap: wrap; }
  .params-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .params-grid { grid-template-columns: 1fr; }
}