:root {
  color-scheme: light dark;
  font-family: "Segoe UI", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  font-size: 16px;
  background-color: #f6f8fb;
  color: #111827;
  scroll-behavior: smooth;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header,
.site-footer {
  background: linear-gradient(135deg, #1f78ff, #63a8ff);
  color: #ffffff;
  padding: 1.5rem clamp(1rem, 4vw, 3rem);
}

.site-header {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.branding h1 {
  margin: 0 0 0.3rem;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}

.branding p {
  margin: 0;
  max-width: 720px;
}

main {
  flex: 1;
  padding: clamp(1.5rem, 4vw, 3rem);
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.single-layout {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  align-items: start;
}

.results-container {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  align-items: start;
}

.card {
  background-color: #ffffff;
  border-radius: 1rem;
  padding: clamp(1.25rem, 3vw, 2rem);
  box-shadow: 0 25px 70px -45px rgba(31, 120, 255, 0.4);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.manager-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.card.info ul {
  margin: 0;
  padding-left: 1.2rem;
}

.card.info li {
  margin-bottom: 0.4rem;
}

fieldset {
  border: 1px solid #d0d7e2;
  border-radius: 0.8rem;
  padding: 1rem;
  display: grid;
  gap: 1rem;
}

legend {
  font-weight: 700;
  color: #124080;
  padding: 0 0.5rem;
}

.input-grid {
  display: grid;
  gap: 1.5rem;
}

.field-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.field-range {
  gap: 0.6rem;
}

.field-range .range-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.range-inputs {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 0.4rem;
}

.range-inputs > span {
  font-weight: 600;
  text-align: center;
}

.field-range input[type="number"] {
  width: 100%;
}

label {
  font-weight: 600;
}

.checkbox {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
}

.checkbox input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  accent-color: #1f78ff;
}

input[type="number"],
input[type="text"],
select {
  border: 1px solid #cbd5e0;
  border-radius: 0.7rem;
  padding: 0.7rem 0.85rem;
  font-size: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  position: relative;
  z-index: 1;
}

input:focus,
select:focus {
  outline: none;
  border-color: #1f78ff;
  box-shadow: 0 0 0 4px rgba(31, 120, 255, 0.18);
}

.field-hint {
  margin: 0;
  font-size: 0.9rem;
  color: #475569;
}

.field-error {
  margin: 0;
  font-size: 0.9rem;
  color: #b91c1c;
}

.result-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.suggestion-summary {
  margin-bottom: 0.5rem;
}

.suggestion-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.6rem;
}

.suggestion-item {
  border: 1px solid #cbd5f5;
  border-radius: 0.75rem;
  padding: 1rem 1.15rem;
  display: grid;
  gap: 0.35rem;
  background-color: #f8fbff;
}

.suggestion-item strong {
  font-size: 1.05rem;
  color: #1d4ed8;
}

.suggestion-item span {
  font-variant-numeric: tabular-nums;
  display: inline-block;
  color: #1f2937;
}

.result-item {
  background-color: #f1f5f9;
  border-radius: 0.75rem;
  padding: 0.9rem 1rem;
}

.result-item h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  color: #1e3a8a;
}

.result-item p {
  margin: 0;
  font-size: 1.25rem;
  font-variant-numeric: tabular-nums;
}

.machine-manager,
.motor-manager {
  display: grid;
  gap: 1rem;
}

.machine-list,
.motor-list {
  display: grid;
  gap: 0.5rem;
  max-height: 240px;
  overflow-y: auto;
}

.machine-item,
.motor-item {
  border: 1px solid #d1d5db;
  border-radius: 0.7rem;
  padding: 0.6rem 0.8rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.machine-item button,
.motor-item button {
  padding: 0.45rem 0.9rem;
  font-size: 0.85rem;
}

button {
  font-size: 1rem;
  border: none;
  border-radius: 999px;
  padding: 0.7rem 1.6rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}

button.primary {
  background: linear-gradient(135deg, #1f78ff, #63a8ff);
  color: #ffffff;
  box-shadow: 0 10px 30px -18px rgba(31, 120, 255, 0.75);
}

button.secondary {
  background-color: #e2e8f0;
  color: #111827;
}

button:hover {
  transform: translateY(-1px);
}

button:active {
  transform: translateY(0);
}

.site-footer {
  text-align: center;
  font-size: 0.9rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    background-color: #0f172a;
    color: #e2e8f0;
  }

  .card {
    background-color: #111827;
    box-shadow: 0 30px 70px -45px rgba(15, 23, 42, 0.7);
  }

  fieldset {
    border-color: #334155;
  }

  input,
  select {
    background-color: #1f2937;
    border-color: #374151;
    color: #e2e8f0;
  }

  .field-hint {
    color: #a0aec0;
  }

  .result-item {
    background-color: #1e293b;
  }

  button.secondary {
    background-color: #1e293b;
    color: #e2e8f0;
  }

  .machine-item,
  .motor-item {
    border-color: #334155;
  }

  .suggestion-item {
    border-color: #3b4a64;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.28), rgba(37, 99, 235, 0.16));
  }

  .suggestion-item strong {
    color: #bfdbfe;
  }

  .suggestion-item span {
    color: #cbd5f5;
  }
}