:root {
  color: #e7ecf3;
  background:
    radial-gradient(circle at top left, rgba(66, 109, 168, 0.35), transparent 28%),
    radial-gradient(circle at top right, rgba(185, 87, 38, 0.25), transparent 25%),
    linear-gradient(135deg, #0f1724 0%, #172638 55%, #111926 100%);
  font-family: "Segoe UI", "Trebuchet MS", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
}

button,
input,
select {
  font: inherit;
}

textarea {
  font: inherit;
}

.app-shell {
  max-width: 1440px;
  margin: 0 auto;
  padding: 32px 20px 56px;
}

.hero {
  display: grid;
  gap: 24px;
  grid-template-columns: 2fr 1fr;
  align-items: start;
  margin-bottom: 28px;
}

.eyebrow {
  margin: 0 0 8px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.8rem;
  color: #9fc1e8;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.1rem, 5vw, 4.1rem);
  line-height: 1.02;
  max-width: 12ch;
}

.hero-copy {
  max-width: 64ch;
  color: #bfd0e3;
}

.hero-card,
.panel,
.metric-card,
.diagnostic-card,
.symptom-pill,
.submit-button {
  border: 1px solid rgba(199, 215, 235, 0.12);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.24);
}

.hero-card,
.panel,
.metric-card,
.diagnostic-card {
  background: rgba(12, 18, 28, 0.72);
  backdrop-filter: blur(18px);
}

.hero-card {
  border-radius: 24px;
  padding: 22px;
  display: grid;
  gap: 10px;
}

.hero-card strong {
  font-size: 1.5rem;
}

.layout {
  display: grid;
  gap: 20px;
  grid-template-columns: 1.2fr 0.95fr;
}

.panel {
  border-radius: 28px;
  padding: 24px;
}

.form-panel {
  display: grid;
  gap: 20px;
}

.app-layout {
  align-items: start;
}

.grid {
  display: grid;
  gap: 16px;
}

.section-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.two-col {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.three-col {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.compact-grid {
  margin-top: 6px;
}

.section-block h2,
.results-panel h2,
.list-block h3,
.diagnostics-block h3 {
  margin: 0 0 14px;
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  color: #acc4e3;
  font-size: 0.92rem;
}

.field input,
.field select,
.notes-area {
  width: 100%;
  border-radius: 16px;
  border: 1px solid rgba(162, 187, 213, 0.15);
  background: rgba(22, 31, 45, 0.92);
  color: #edf2f8;
  padding: 12px 14px;
}

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

.dual-input {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.term-help {
  margin-top: 16px;
  border: 1px solid rgba(199, 215, 235, 0.12);
  border-radius: 16px;
  background: rgba(15, 24, 36, 0.78);
  padding: 14px;
}

.term-help h3 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.term-list {
  margin: 0;
  padding-left: 18px;
  color: #d8e3ef;
  display: grid;
  gap: 8px;
}

.notes-area {
  min-height: 110px;
  resize: vertical;
}

.range-card,
.material-card {
  border: 1px solid rgba(199, 215, 235, 0.12);
  background: rgba(15, 24, 36, 0.78);
  border-radius: 22px;
  padding: 18px;
}

.range-card h3,
.material-card strong {
  margin: 0;
}

.range-card h3 {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 16px;
}

.range-card h3 span {
  color: #9db5d3;
  font-size: 0.9rem;
  font-weight: 400;
}

.symptom-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.symptom-pill {
  border-radius: 999px;
  background: rgba(21, 30, 42, 0.85);
  color: #d4deea;
  padding: 10px 14px;
  cursor: pointer;
  border: 1px solid rgba(199, 215, 235, 0.12);
}

.symptom-pill.active {
  background: linear-gradient(135deg, #d77d34, #d1462f);
  color: #fff;
}

.submit-button {
  border-radius: 18px;
  border: none;
  background: linear-gradient(135deg, #3f8cf3, #2f5ca8);
  color: #fff;
  padding: 14px 18px;
  cursor: pointer;
  font-weight: 700;
}

.error-box {
  margin: 0;
  background: rgba(181, 49, 49, 0.2);
  border: 1px solid rgba(255, 128, 128, 0.35);
  padding: 12px 14px;
  border-radius: 14px;
  color: #ffd1d1;
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 16px;
}

.confidence {
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 0.88rem;
  background: rgba(106, 137, 171, 0.18);
}

.confidence.high {
  background: rgba(52, 154, 99, 0.22);
}

.confidence.medium {
  background: rgba(172, 134, 56, 0.24);
}

.confidence.low {
  background: rgba(182, 78, 52, 0.26);
}

.results-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 20px 0;
}

.results-grid.three-up {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.metric-card {
  border-radius: 20px;
  padding: 16px;
  display: grid;
  gap: 10px;
}

.metric-card span {
  color: #9db5d3;
}

.metric-card strong {
  font-size: 1.15rem;
}

.compact-text {
  margin: 0;
  line-height: 1.5;
}

.compact-section {
  margin-top: 20px;
}

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

.operation-grid {
  display: grid;
  gap: 12px;
}

.material-card {
  display: grid;
  gap: 8px;
}

.operation-card {
  border: 1px solid rgba(199, 215, 235, 0.12);
  background: rgba(15, 24, 36, 0.78);
  border-radius: 22px;
  padding: 18px;
}

.operation-card strong {
  display: block;
  margin-bottom: 8px;
}

.operation-card ul {
  margin: 12px 0 0;
  padding-left: 18px;
  color: #d8e3ef;
}

.material-card p {
  margin: 0;
}

.material-card.active {
  border-color: rgba(92, 156, 236, 0.45);
  box-shadow: inset 0 0 0 1px rgba(92, 156, 236, 0.16);
}

.hint-list {
  margin: 0;
  padding-left: 18px;
  color: #d8e3ef;
  display: grid;
  gap: 8px;
}

.operation-card.active {
  border-color: rgba(215, 125, 52, 0.48);
  box-shadow: inset 0 0 0 1px rgba(215, 125, 52, 0.16);
}

.list-block ul,
.diagnostic-card ul {
  margin: 10px 0 0;
  padding-left: 18px;
  color: #d8e3ef;
}

.diagnostics-block {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.diagnostic-card {
  border-radius: 20px;
  padding: 16px;
}

.diagnostic-card h4 {
  margin: 0 0 10px;
}

.muted {
  color: #9db0c6;
}

@media (max-width: 1080px) {
  .hero,
  .layout,
  .three-col,
  .two-col {
    grid-template-columns: 1fr;
  }

  .results-grid {
    grid-template-columns: 1fr;
  }

  .material-grid,
  .results-grid.three-up {
    grid-template-columns: 1fr;
  }

  .section-actions {
    flex-direction: column;
    align-items: stretch;
  }
}