:root {
  --bg: #0b1020;
  --bg-soft: #121a31;
  --card: rgba(17, 24, 39, 0.82);
  --card-border: rgba(255, 255, 255, 0.1);
  --text: #eef2ff;
  --muted: #a8b3cf;
  --accent: #7c3aed;
  --accent-2: #22c55e;
  --button-dark: #1f2937;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
  --radius-xl: 24px;
  --radius-lg: 18px;
  --radius-md: 14px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(124, 58, 237, 0.25), transparent 32%),
    radial-gradient(circle at top right, rgba(34, 197, 94, 0.16), transparent 28%),
    linear-gradient(180deg, #09101d 0%, #0d1324 100%);
}

body {
  padding: 24px;
}

.page {
  max-width: 1500px;
  margin: 0 auto;
}

.hero {
  margin-bottom: 24px;
}

.hero-copy {
  padding: 10px 2px 0;
}

.eyebrow,
.section-kicker {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #9fb1ff;
}

.hero h1,
.card-head h2 {
  margin: 0;
  line-height: 1.05;
}

.hero h1 {
  font-size: clamp(2.2rem, 3vw, 3.6rem);
  font-weight: 800;
}

.hero-text {
  max-width: 760px;
  margin: 14px 0 0;
  font-size: 1.02rem;
  line-height: 1.65;
  color: var(--muted);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(340px, 420px);
  gap: 24px;
  align-items: start;
}

.preview-column,
.controls-column {
  min-width: 0;
}

.controls-column {
  display: grid;
  gap: 18px;
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.preview-card {
  padding: 20px;
}

.control-card {
  padding: 18px;
}

.card-head {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 16px;
  margin-bottom: 16px;
}

.preview-head {
  align-items: center;
}

.card-head h2 {
  font-size: 1.25rem;
  font-weight: 750;
}

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

.btn {
  border: 0;
  border-radius: 999px;
  padding: 12px 18px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, opacity 0.18s ease, box-shadow 0.18s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.65;
  transform: none;
}

.btn-primary {
  background: linear-gradient(135deg, #7c3aed, #4f46e5);
  color: white;
  box-shadow: 0 14px 28px rgba(99, 102, 241, 0.28);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.canvas-shell {
  position: relative;
  width: 100%;
  min-height: 540px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background:
    linear-gradient(135deg, rgba(124, 58, 237, 0.08), rgba(34, 197, 94, 0.06)),
    rgba(4, 8, 18, 0.85);
  display: flex;
  align-items: start;
  justify-content: center;
  padding: 14px;
}

#previewCanvas {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
  max-height: 78vh;
  margin: 0 auto;
  border-radius: 16px;
  background: #0b0f1a;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.05);
}

.canvas-hint {
  position: absolute;
  inset: 50% auto auto 50%;
  transform: translate(-50%, -50%);
  width: min(380px, calc(100% - 40px));
  padding: 18px 20px;
  text-align: center;
  line-height: 1.5;
  color: var(--muted);
  background: rgba(8, 12, 22, 0.86);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 18px;
}

.status-bar {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.05);
}

.status {
  margin: 0;
  color: #d6ddf6;
  font-size: 0.95rem;
}

.control-grid {
  display: grid;
  gap: 14px;
}

.control-group + .control-group {
  margin-top: 14px;
}

label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.94rem;
  font-weight: 650;
  color: #edf2ff;
}

.label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 8px;
}

.label-row span {
  color: #c7d2fe;
  font-size: 0.92rem;
  font-weight: 700;
}

input[type="text"],
input[type="file"] {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(7, 11, 22, 0.68);
  color: var(--text);
  border-radius: 14px;
  padding: 14px 15px;
  font-size: 0.96rem;
  outline: none;
}

input[type="text"]::placeholder {
  color: #8390b3;
}

input[type="text"]:focus,
input[type="file"]:focus {
  border-color: rgba(124, 58, 237, 0.8);
  box-shadow: 0 0 0 4px rgba(124, 58, 237, 0.14);
}

input[type="file"] {
  padding: 12px;
  cursor: pointer;
}

input[type="range"] {
  width: 100%;
  margin: 0;
  accent-color: #7c3aed;
  cursor: pointer;
}

@media (max-width: 1120px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .controls-column {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 760px) {
  body {
    padding: 16px;
  }

  .preview-card,
  .control-card {
    padding: 16px;
  }

  .controls-column {
    grid-template-columns: 1fr;
  }

  .card-head,
  .preview-head {
    flex-direction: column;
    align-items: stretch;
  }

  .action-row {
    width: 100%;
  }

  .action-row .btn {
    flex: 1 1 auto;
  }

  .canvas-shell {
    min-height: 360px;
    padding: 10px;
  }
}