:root {
  --purple: #7b14ef;
  --lavender: #c497fe;
  --mauve: #ebdcfd;
  --white: #ffffff;
  --black: #000000;
  --pink: #fe02a7;
  --stone: #e6e0d1;

  --bg: var(--mauve);
  --surface: var(--white);
  --text: var(--black);
  --text-muted: #3d3d3d;
  --border: var(--lavender);
  --shadow: rgba(123, 20, 239, 0.15);
}

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

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: linear-gradient(160deg, var(--mauve) 0%, var(--stone) 45%, var(--white) 100%);
  color: var(--text);
  line-height: 1.5;
}

.header {
  padding: 2.5rem 1.5rem 1.5rem;
  text-align: center;
  background: linear-gradient(135deg, var(--purple) 0%, var(--lavender) 100%);
  color: var(--white);
}

.header h1 {
  margin: 0 0 0.5rem;
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0 auto;
  max-width: 42rem;
  font-size: 1rem;
  opacity: 0.95;
}

.main {
  max-width: 52rem;
  margin: 0 auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.card {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  box-shadow: 0 8px 24px var(--shadow);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 1.25rem;
}

.field-label {
  font-weight: 600;
  color: var(--purple);
}

.field input {
  width: 8rem;
  padding: 0.5rem 0.75rem;
  font-size: 1rem;
  border: 2px solid var(--lavender);
  border-radius: 8px;
  background: var(--white);
  color: var(--black);
}

.field input:focus {
  outline: 3px solid var(--pink);
  outline-offset: 2px;
  border-color: var(--purple);
}

.buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  cursor: pointer;
  border: none;
  border-radius: 8px;
  padding: 0.65rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--shadow);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--purple);
  color: var(--white);
}

.btn-reset {
  background: var(--stone);
  color: var(--black);
  border: 2px solid var(--lavender);
}

.metrics h2 {
  margin: 0 0 1rem;
  font-size: 1.1rem;
  color: var(--purple);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(10rem, 1fr));
  gap: 1rem;
  margin: 0;
}

.metrics-grid div {
  margin: 0;
}

.metrics-grid dt {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.metrics-grid dd {
  margin: 0;
  font-size: 1.35rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--purple);
}

.metrics-grid dd.inp-good {
  color: #0a7a3e;
}

.metrics-grid dd.inp-needs-improvement {
  color: #9a6b00;
}

.metrics-grid dd.inp-poor {
  color: var(--pink);
}

.metrics-hint {
  margin: 1rem 0 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

[hidden] {
  display: none !important;
}

.content-area {
  margin-top: 0.25rem;
}

.content-box {
  min-height: 14rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 3rem 2rem;
  border-radius: 12px;
  border: 3px dashed var(--purple);
  background: linear-gradient(180deg, var(--white) 0%, var(--mauve) 100%);
  animation: reveal 0.35s ease-out;
}

@keyframes reveal {
  from {
    opacity: 0;
    transform: scale(0.98);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.content-loading {
  margin: 0;
  font-size: clamp(1.25rem, 4vw, 2rem);
  font-weight: 600;
  color: var(--lavender);
  text-align: center;
}

.content-loaded {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.content-label {
  margin: 0;
  font-size: clamp(1.5rem, 5vw, 2.5rem);
  font-weight: 700;
  color: var(--purple);
  text-align: center;
}

.content-meta {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer {
  text-align: center;
  padding: 2rem 1rem 2.5rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}