:root {
  --paul-blue: #00a9ee;
  --paul-blue-soft: #e3f4fc;
  --bg: #ffffff;
  --card-bg: #ffffff;
  --card-bg-soft: #f5f7fb;
  --border-subtle: #d3d9e4;
  --text-main: #1a2433;
  --text-muted: #6a768a;
  --danger: #c62828;
  --radius-lg: 14px;
  --radius-md: 10px;
  --shadow-soft: 0 8px 20px rgba(0, 0, 0, 0.08);
  --shadow-elevated: 0 16px 40px rgba(0, 0, 0, 0.12);
  --transition-fast: 0.16s ease-out;
  --transition-med: 0.22s ease-out;
  --input-bg: #ffffff;
}

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

html,
body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f0f4f9;
  color: var(--text-main);
}

body {
  display: flex;
  flex-direction: column;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem 1.8rem;
  background: #ffffff;
  border-bottom: 3px solid var(--paul-blue);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06);
}

.app-brand h1 {
  margin: 0;
  font-size: clamp(1.4rem, 2.1vw, 1.9rem);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.app-brand p {
  margin: 0.1rem 0 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.app-controls {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.language-select-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.language-select {
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
  background: #ffffff;
  color: var(--text-main);
  padding: 0.35rem 1.8rem 0.35rem 0.5rem;
  font-size: 0.85rem;
  appearance: none;
  position: relative;
  outline: none;
  cursor: pointer;
  background-image: linear-gradient(45deg, transparent 50%, var(--paul-blue) 50%),
    linear-gradient(135deg, var(--paul-blue) 50%, transparent 50%);
  background-position: calc(100% - 14px) calc(50% - 2px), calc(100% - 9px) calc(50% - 2px);
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
}

.logo {
  height: 40px;
  width: auto;
}

.app-main {
  flex: 1;
  max-width: 1160px;
  width: 100%;
  margin: 1.4rem auto 1.8rem;
  padding: 0 1.4rem 2.3rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.3rem;
  align-items: flex-start;
}

.card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 1.3rem 1.25rem 1.4rem;
  box-shadow: var(--shadow-soft);
  border: 1px solid #e1e6f0;
}

.card h2 {
  margin-top: 0;
  margin-bottom: 0.8rem;
  font-size: 1rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--paul-blue);
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.form-group label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

input[type="number"] {
  width: 100%;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
  background: var(--input-bg);
  padding: 0.5rem 0.7rem;
  color: var(--text-main);
  font-size: 0.9rem;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

input[type="number"]::placeholder {
  color: #a2aab8;
}

input[type="number"]:focus {
  border-color: var(--paul-blue);
  box-shadow: 0 0 0 1px rgba(0, 169, 238, 0.4);
  background: #ffffff;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.55rem 1.15rem;
  border-radius: 999px;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
  white-space: nowrap;
}

.btn.primary {
  background: var(--paul-blue);
  color: #ffffff;
  box-shadow: 0 8px 16px rgba(0, 169, 238, 0.4);
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(0, 169, 238, 0.6);
}

.btn.primary:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(0, 169, 238, 0.5);
}

.btn.secondary {
  background: #ffffff;
  color: var(--paul-blue);
  border: 1px solid var(--paul-blue);
}

.btn.secondary:hover {
  background: var(--paul-blue-soft);
}

.input-with-button {
  display: flex;
  align-items: stretch;
  gap: 0.4rem;
}

.input-with-button input {
  flex: 1;
}

.machine-types {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.35rem 0.75rem;
  font-size: 0.8rem;
}

.machine-types label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  cursor: pointer;
  color: var(--text-muted);
  white-space: nowrap;
}

.machine-types input[type="radio"] {
  accent-color: var(--paul-blue);
}

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.6rem;
  margin-top: 1rem;
  margin-bottom: 0.6rem;
  padding: 0.55rem 0.75rem;
  border-radius: 999px;
  background: #f3f8fd;
}

.toggle-row span {
  font-size: 0.85rem;
}

.switch {
  position: relative;
  display: inline-block;
  width: 46px;
  height: 26px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #d3d9e4;
  transition: 0.2s;
  border-radius: 34px;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.6);
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: 0.2s;
  border-radius: 50%;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.switch input:checked + .slider {
  background-color: var(--paul-blue);
}

.switch input:checked + .slider:before {
  transform: translateX(18px);
}

.switch-text {
  color: var(--text-muted);
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.9rem;
  margin-top: 0.6rem;
}

.result-item {
  background: var(--card-bg-soft);
  border-radius: var(--radius-md);
  padding: 0.75rem 0.8rem;
  border: 1px solid #dde4f0;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
}

.result-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

.result-value {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
}

.result-critical {
  color: #ff9800;
}

.result-note {
  margin-top: 0.7rem;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.result-subtle {
  margin-top: 0.15rem;
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 400;
}


.modal {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.modal.hidden {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(6px);
}

.modal-content {
  position: relative;
  max-width: 500px;
  width: calc(100% - 2.4rem);
  padding: 1.2rem 1.3rem 1.1rem;
  border-radius: var(--radius-lg);
  background: #ffffff;
  box-shadow: var(--shadow-elevated);
  border: 1px solid #dde4f0;
  z-index: 110;
}

.modal-content h3 {
  margin: 0 0 0.7rem;
  font-size: 1rem;
}

.modal-close {
  position: absolute;
  top: 0.5rem;
  right: 0.7rem;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
}

.modal-result {
  margin-top: 0.8rem;
  font-size: 0.9rem;
}

.kc-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.2rem;
  font-size: 0.85rem;
}

.kc-table th,
.kc-table td {
  padding: 0.35rem 0.4rem;
  border-bottom: 1px solid #e1e6f0;
}

.kc-table thead {
  background: var(--paul-blue-soft);
}

.kc-table tbody tr:nth-child(odd) {
  background: #f7f9fc;
}

.kc-table tbody tr:nth-child(even) {
  background: #ffffff;
}

.app-footer {
  text-align: center;
  padding: 0.75rem 1rem 1.1rem;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.hidden {
  display: none !important;
}

@media (max-width: 960px) {
}

@media (max-width: 720px) {
  .app-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }

  .app-controls {
    align-self: stretch;
    justify-content: space-between;
  }

  .card {
    padding: 1.05rem 1rem 1.1rem;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }

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

  .logo {
    height: 32px;
  }

  .machine-types {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  }
}

@media (max-width: 480px) {
  .app-main {
    padding-inline: 0.75rem;
  }

  .app-brand h1 {
    font-size: 1.15rem;
  }

  .app-brand p {
    font-size: 0.78rem;
  }

  .language-select {
    padding-inline: 0.6rem 1.4rem;
  }

}