:root {
  --bg: #fff8f0;
  --panel: rgba(255, 255, 255, 0.92);
  --text: #1c1f2e;
  --muted: #596079;
  --accent: #d04e36;
  --accent-soft: #f7c9ae;
  --ring: #1f7a8c;
  --border: #e7ddcf;
  --ok: #2a7f62;
  --error: #9a2828;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Space Grotesk', sans-serif;
  color: var(--text);
  background: radial-gradient(circle at 10% 10%, #ffd39f 0%, transparent 32%),
    radial-gradient(circle at 86% 20%, #f5b5a8 0%, transparent 24%),
    linear-gradient(165deg, #fff8f0 0%, #fef3e2 44%, #f8ead8 100%);
  overflow-x: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(to right, rgba(28, 31, 46, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(28, 31, 46, 0.04) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(circle at center, black 30%, transparent 80%);
}

.app-shell {
  width: min(1200px, 94vw);
  margin: 2rem auto 3rem;
  display: grid;
  grid-template-columns: 0.7fr 1fr 1fr;
  gap: 1.2rem;
  animation: rise 500ms ease-out;
}

.hero {
  grid-column: 1 / -1;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.85), rgba(255, 245, 238, 0.92));
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 1.4rem 1.6rem;
  box-shadow: 0 14px 34px rgba(82, 47, 38, 0.1);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--ring);
  margin: 0;
  font-size: 0.75rem;
}

h1 {
  margin: 0.35rem 0;
  font-size: clamp(1.8rem, 2.6vw, 3rem);
}

.hero p {
  margin: 0;
  color: var(--muted);
  max-width: 70ch;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: 0 10px 30px rgba(67, 49, 39, 0.08);
  padding: 1rem;
  backdrop-filter: blur(2px);
}

.settings {
  display: grid;
  align-content: start;
  gap: 0.5rem;
}

.input-panel {
  display: grid;
  align-content: start;
  gap: 0.5rem;
}

label {
  font-size: 0.9rem;
  font-weight: 600;
}

input,
select,
textarea,
button {
  font: inherit;
}

#fileInput {
  display: none;
}

input,
select,
textarea {
  border: 1px solid #d9cdbd;
  border-radius: 10px;
  background: #fffdfa;
  padding: 0.65rem 0.75rem;
  color: var(--text);
  transition: border-color 140ms ease, box-shadow 140ms ease;
}

textarea {
  min-height: 280px;
  resize: vertical;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.86rem;
  line-height: 1.5;
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--ring);
  box-shadow: 0 0 0 3px rgba(31, 122, 140, 0.16);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-top: 0.45rem;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 0.58rem 1rem;
  font-weight: 700;
  cursor: pointer;
  background: var(--accent);
  color: white;
  transition: transform 120ms ease, filter 120ms ease;
}

button:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

button:active {
  transform: translateY(1px);
}

button.secondary {
  background: white;
  color: var(--text);
  border: 1px solid #d6c8b5;
}

.output {
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 0.6rem;
}

.output-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}

h2 {
  margin: 0;
  font-size: 1.05rem;
}

.compact {
  margin: 0;
}

.output-actions {
  justify-content: flex-end;
}

#jsonInput,
#output {
  min-height: 500px;
}

#status {
  margin: 0.2rem 0 0;
  min-height: 1.2rem;
  font-size: 0.9rem;
  color: var(--ok);
}

#status.error {
  color: var(--error);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 920px) {
  .app-shell {
    margin-top: 1rem;
    grid-template-columns: 1fr;
  }

  #jsonInput,
  #output {
    min-height: 360px;
  }
}