:root {
  --bg: #f5f1e8;
  --card: #fffaf0;
  --ink: #1f2a2e;
  --muted: #5d6a6f;
  --line: #d5cdc0;
  --brand: #ca5a2e;
  --brand-ink: #fff3ec;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: radial-gradient(circle at 80% -10%, #ffd7b8, transparent 40%), var(--bg);
  font-family: "Space Grotesk", sans-serif;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image: linear-gradient(to right, rgba(31, 42, 46, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(31, 42, 46, 0.06) 1px, transparent 1px);
  background-size: 26px 26px;
  pointer-events: none;
}

.layout {
  position: relative;
  z-index: 1;
  max-width: 980px;
  margin: 24px auto;
  padding: 0 16px 24px;
  display: grid;
  gap: 14px;
}

#appPage {
  display: grid;
  gap: 14px;
}

.hidden {
  display: none !important;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 6px 20px rgba(64, 48, 35, 0.08);
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.4rem, 2.5vw, 2rem);
}

.hero p {
  margin: 6px 0 0;
  color: var(--muted);
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 10px;
}

label {
  display: grid;
  gap: 6px;
  font-weight: 500;
}

input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
  background: #fff;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  font-family: inherit;
  font-weight: 700;
  color: var(--brand-ink);
  background: var(--brand);
  cursor: pointer;
}

select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
  background: #fff;
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tab-btn {
  background: #2f3f45;
  color: #fff;
}

.tab-btn.active {
  background: var(--brand);
  color: var(--brand-ink);
}

.stack {
  margin-top: 10px;
  display: grid;
  gap: 8px;
}

.item {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 10px;
  display: grid;
  gap: 8px;
}

.item-head {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  flex-wrap: wrap;
}

.muted {
  color: var(--muted);
  font-size: 0.92rem;
}

.mono {
  font-family: "IBM Plex Mono", monospace;
  white-space: pre-wrap;
  word-break: break-word;
}

@media (max-width: 760px) {
  .row {
    grid-template-columns: 1fr;
  }
}