:root {
  --bg: #ffffff;
  --text: #101010;
  --muted: #5f5f5f;
  --shadow: #bcbcbc;
  --panel: #f3f3f3;
  --line: #111111;
  --mega-light: #DFD9D9;
  --mega-dark: #19191A;
  --font-hero: 'Anton', Impact, sans-serif;
  --font-ui: 'Oswald', system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
}

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

.page-shell {
  width: min(1280px, calc(100% - 32px));
  margin: 0 auto;
  padding: 24px 0 48px;
}

.hero-stage {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 24px 0 36px;
}

.context-header {
  text-transform: uppercase;
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  margin-bottom: 2rem;
  font-weight: 700;
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

.context-header span {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.context-header::before,
.context-header::after {
  content: '';
  display: block;
  width: 40px;
  height: 4px;
  background-color: var(--text);
}

.hero-copy {
  margin-bottom: 2rem;
}

.hero-copy h1 {
  margin: 0;
  font-family: var(--font-hero);
  font-size: clamp(4.5rem, 13vw, 10rem);
  line-height: 0.9;
  letter-spacing: -0.04em;
  text-shadow:
    -1px 1px 0 var(--shadow),
    -2px 2px 0 var(--shadow),
    -3px 3px 0 var(--shadow),
    -4px 4px 0 var(--shadow),
    -5px 5px 0 var(--shadow),
    -6px 6px 0 var(--shadow),
    -7px 7px 0 var(--shadow),
    -8px 8px 0 var(--shadow);
}

.hero-sub {
  max-width: 56ch;
  margin: 1rem 0 0;
  font-size: 1.05rem;
  text-transform: uppercase;
  color: var(--muted);
  line-height: 1.5;
}

.studio-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 24px;
  align-items: stretch;
}

.control-panel,
.preview-panel {
  background: var(--panel);
  border: 2px solid var(--text);
  box-shadow: -10px 10px 0 var(--shadow);
  padding: 20px;
}

.upload-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  border: 3px dashed var(--text);
  background: #fff;
  padding: 20px;
  cursor: pointer;
  margin-bottom: 18px;
  transition: transform 120ms ease, background 120ms ease;
}

.upload-card:hover {
  transform: translate(-2px, 2px);
  background: #f8f8f8;
}

.upload-kicker,
.block-label,
.preview-label,
.footer-note {
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.upload-kicker,
.block-label,
.preview-label {
  font-size: 0.75rem;
  color: var(--muted);
}

.upload-card strong {
  font-size: 1.4rem;
  text-transform: uppercase;
}

.upload-card span:last-child {
  color: var(--muted);
}

.control-block {
  margin-bottom: 18px;
}

.palette-note {
  margin-top: 10px;
  padding: 12px 14px;
  border: 2px solid var(--text);
  background: linear-gradient(90deg, var(--mega-dark) 0%, var(--mega-dark) 50%, var(--mega-light) 50%, var(--mega-light) 100%);
  color: #fff;
  text-transform: uppercase;
  font-size: 0.9rem;
  line-height: 1.4;
}

.palette-note strong:last-child {
  color: var(--mega-dark);
}

.action-btn {
  appearance: none;
  background: #fff;
  border: 3px solid var(--text);
  color: var(--text);
  text-transform: uppercase;
  font-weight: 700;
  cursor: pointer;
  box-shadow: -5px 5px 0 var(--shadow);
  transition: all 120ms ease;
}

.action-btn.primary {
  background: var(--text);
  color: #fff;
}

.action-btn:hover {
  transform: translate(-2px, 2px);
  box-shadow: -3px 3px 0 var(--shadow);
}

.slider-label {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: 10px;
}

input[type="range"] {
  width: 100%;
}

.action-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.action-btn {
  padding: 0.9rem 1.1rem;
}

.action-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.preview-meta {
  margin-bottom: 14px;
}

.preview-sub {
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 4px;
}

.canvas-stage {
  position: relative;
  background: linear-gradient(135deg, rgba(25,25,26,0.08), rgba(223,217,217,0.35));
  border: 3px solid var(--text);
  aspect-ratio: 1 / 1;
  overflow: hidden;
}

#previewCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.empty-state {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  text-align: center;
  padding: 24px;
}

.empty-state p {
  margin: 0;
  text-transform: uppercase;
  color: var(--muted);
}

.footer-note {
  margin-top: 18px;
  font-size: 0.8rem;
  color: var(--muted);
}

@media (max-width: 960px) {
  .studio-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100% - 20px, 1280px);
  }

  .context-header::before,
  .context-header::after {
    display: none;
  }
}