:root {
  --bg: #f3efe5;
  --panel: rgba(255, 252, 247, 0.9);
  --panel-strong: #fffaf2;
  --ink: #1d1a16;
  --muted: #685f56;
  --line: rgba(61, 47, 36, 0.12);
  --accent: #d65a31;
  --accent-dark: #9e3817;
  --accent-soft: rgba(214, 90, 49, 0.14);
  --shadow: 0 18px 50px rgba(78, 50, 24, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(214, 90, 49, 0.18), transparent 30%),
    radial-gradient(circle at top right, rgba(83, 127, 97, 0.18), transparent 26%),
    linear-gradient(180deg, #fbf7ef 0%, var(--bg) 55%, #efe4d2 100%);
}

button,
input,
label {
  font: inherit;
}

.page-shell {
  width: min(1260px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 48px;
}

.hero {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 24px;
  align-items: stretch;
  margin-bottom: 18px;
}

.hero-copy,
.hero-card,
.panel,
.tab-bar {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.hero-copy {
  padding: 28px;
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-dark);
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.3rem);
  line-height: 1.02;
}

.lede {
  margin: 16px 0 0;
  max-width: 60ch;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-card {
  padding: 24px;
  display: grid;
  gap: 18px;
  align-content: center;
  background:
    linear-gradient(135deg, rgba(214, 90, 49, 0.09), rgba(83, 127, 97, 0.1)),
    var(--panel-strong);
}

.stat {
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid rgba(61, 47, 36, 0.08);
}

.stat-label {
  display: block;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-bottom: 8px;
}

.tab-bar {
  display: flex;
  gap: 10px;
  padding: 10px;
  margin-bottom: 18px;
}

.tab-button {
  background: transparent;
  color: var(--muted);
}

.tab-button.active {
  background: var(--accent);
  color: #fff;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.layout {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.builder-layout {
  grid-template-columns: 420px 1fr;
}

.panel {
  padding: 24px;
}

.section-heading h2 {
  margin: 0;
  font-size: 1.3rem;
}

.section-heading p {
  margin: 8px 0 0;
  color: var(--muted);
}

.upload-zone {
  display: grid;
  gap: 8px;
  padding: 26px;
  margin: 18px 0 24px;
  border-radius: 20px;
  border: 2px dashed rgba(214, 90, 49, 0.4);
  background: linear-gradient(180deg, rgba(214, 90, 49, 0.06), rgba(255, 255, 255, 0.45));
  cursor: pointer;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.upload-zone:hover,
.upload-zone.drag-over {
  transform: translateY(-2px);
  border-color: var(--accent);
  background: linear-gradient(180deg, rgba(214, 90, 49, 0.12), rgba(255, 255, 255, 0.6));
}

.upload-zone input {
  display: none;
}

.upload-title {
  font-size: 1.1rem;
  font-weight: 700;
}

.upload-subtitle {
  color: var(--muted);
}

.mode-grid,
.control-grid {
  display: grid;
  gap: 14px;
  margin: 18px 0;
}

.mode-card {
  display: grid;
  gap: 6px;
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.65);
  border: 1px solid rgba(61, 47, 36, 0.08);
  cursor: pointer;
}

.mode-card input {
  margin: 0 0 4px;
}

.mode-title {
  font-weight: 700;
}

.mode-copy {
  color: var(--muted);
  font-size: 0.95rem;
}

.control {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 12px;
  align-items: center;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.65);
  border: 1px solid rgba(61, 47, 36, 0.08);
}

.control.stacked {
  grid-template-columns: 1fr;
}

.control input[type="range"],
.control input[type="text"],
.control input[type="password"] {
  width: 100%;
}

.control input[type="range"] {
  grid-column: 1 / -1;
  accent-color: var(--accent);
}

.control input[type="text"],
.control input[type="password"] {
  border: 1px solid rgba(61, 47, 36, 0.12);
  background: rgba(255, 255, 255, 0.9);
  border-radius: 12px;
  padding: 10px 12px;
  color: var(--ink);
}

.toggle-row {
  display: grid;
  gap: 10px;
  margin: 12px 0 18px;
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
}

.button-row,
.toolbar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

button {
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  cursor: pointer;
  transition: transform 120ms ease, opacity 120ms ease, background 120ms ease;
}

button:hover:not(:disabled) {
  transform: translateY(-1px);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.secondary {
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.status {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(61, 47, 36, 0.08);
  color: var(--muted);
  line-height: 1.45;
}

.canvas-wrap {
  margin-top: 18px;
  border-radius: 20px;
  overflow: auto;
  background:
    linear-gradient(45deg, rgba(0, 0, 0, 0.04) 25%, transparent 25%, transparent 75%, rgba(0, 0, 0, 0.04) 75%),
    linear-gradient(45deg, rgba(0, 0, 0, 0.04) 25%, transparent 25%, transparent 75%, rgba(0, 0, 0, 0.04) 75%);
  background-position: 0 0, 12px 12px;
  background-size: 24px 24px;
  border: 1px solid rgba(61, 47, 36, 0.08);
}

#sourceCanvas,
#builderCanvas {
  display: block;
  max-width: 100%;
}

.results-header {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: end;
  flex-wrap: wrap;
}

.results-summary {
  margin-top: 12px;
  color: var(--muted);
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.sprite-card {
  padding: 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(61, 47, 36, 0.08);
}

.sprite-card.removed {
  opacity: 0.45;
}

.sprite-preview {
  display: grid;
  place-items: center;
  min-height: 120px;
  padding: 10px;
  border-radius: 14px;
  background:
    linear-gradient(45deg, rgba(0, 0, 0, 0.04) 25%, transparent 25%, transparent 75%, rgba(0, 0, 0, 0.04) 75%),
    linear-gradient(45deg, rgba(0, 0, 0, 0.04) 25%, transparent 25%, transparent 75%, rgba(0, 0, 0, 0.04) 75%);
  background-position: 0 0, 10px 10px;
  background-size: 20px 20px;
}

.sprite-preview img {
  max-width: 100%;
  max-height: 180px;
  image-rendering: pixelated;
}

.sprite-meta {
  margin: 12px 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.card-controls {
  display: grid;
  gap: 8px;
}

.inline-check {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
}

@media (max-width: 980px) {
  .hero,
  .layout,
  .builder-layout {
    grid-template-columns: 1fr;
  }

  .page-shell {
    width: min(100% - 20px, 1260px);
    padding-top: 20px;
  }
}