:root {
  color-scheme: dark;
  --bg: #121212;
  --surface: rgba(24, 24, 24, 0.95);
  --surface-strong: #1c1c1c;
  --surface-soft: rgba(255,255,255,0.05);
  --text: #f8f8f8;
  --muted: #b4b4b4;
  --accent: #7dd3fc;
  --accent-strong: #38bdf8;
  --border: rgba(255,255,255,0.08);
  --shadow: 0 35px 80px rgba(0,0,0,0.35);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
  background: radial-gradient(circle at top left, rgba(63, 94, 251, 0.14), transparent 28%),
    radial-gradient(circle at bottom right, rgba(56, 189, 248, 0.12), transparent 28%),
    #0f172a;
  color: var(--text);
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100'%3E%3Cpath fill='none' stroke='%23343d57' stroke-width='1' d='M0 100L100 0M0 0l100 100'/%3E%3C/svg%3E");
  opacity: 0.04;
  pointer-events: none;
}

.page-shell {
  max-width: 1280px;
  margin: 0 auto;
  padding: 32px 24px 48px;
}

.hero {
  padding: 34px 30px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
  display: grid;
  gap: 24px;
}

.hero-brand {
  display: flex;
  gap: 18px;
  align-items: center;
}

.logo-mark {
  width: 72px;
  height: 72px;
  border-radius: 22px;
  display: grid;
  place-items: center;
  font-size: 32px;
  background: rgba(255,255,255,0.06);
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent);
  margin: 0 0 12px;
  font-size: 0.85rem;
}

h1 {
  font-size: clamp(2.5rem, 2.4vw, 3.6rem);
  line-height: 1.02;
  margin: 0;
}

.subtitle {
  max-width: 55ch;
  color: var(--muted);
  margin: 16px 0 0;
  font-size: 1rem;
}

.hero-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 20px;
  border-radius: 999px;
  text-decoration: none;
  color: var(--text);
  background: linear-gradient(135deg, rgba(56,189,248,0.24), rgba(96,165,250,0.22));
  border: 1px solid rgba(96,165,250,0.18);
  transition: transform 0.15s ease, background 0.15s ease;
}

.hero-links a:hover {
  transform: translateY(-1px);
}

.editor-panel {
  display: grid;
  gap: 24px;
  margin-top: 32px;
  grid-template-columns: minmax(0, 1.5fr) 0.95fr;
}

.preview-pane, .control-panel {
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--surface);
  padding: 24px;
}

.section-label {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
}

.preview-meta {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: flex-start;
  margin-bottom: 20px;
}

.preview-meta h2 {
  margin: 0;
  font-size: 1.5rem;
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

button, select, input {
  font: inherit;
}

button {
  border: none;
  border-radius: 999px;
  padding: 12px 18px;
  cursor: pointer;
}

button.primary {
  background: linear-gradient(135deg, #38bdf8, #7dd3fc);
  color: #0f172a;
}

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

.control-card {
  display: grid;
  gap: 18px;
}

.controls-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.layer-list {
  display: grid;
  gap: 16px;
}

.layer-card {
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 18px;
  background: rgba(255,255,255,0.03);
  padding: 18px;
}

.layer-card h4 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.field-row {
  display: grid;
  gap: 10px;
}

.field-row label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.92rem;
  color: #d1d5db;
}

.field-row input,
.field-row select,
.field-row textarea {
  width: 100%;
  min-height: 40px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  color: var(--text);
  padding: 10px 12px;
}

.field-row textarea {
  resize: vertical;
  min-height: 70px;
}

.template-grid {
  margin-top: 36px;
}

.section-heading {
  margin-bottom: 21px;
}

.template-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 18px;
}

.template-card {
  border-radius: 22px;
  overflow: hidden;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.08);
  cursor: pointer;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.template-card:hover {
  transform: translateY(-4px);
  border-color: rgba(56,189,248,0.28);
}

.template-card img {
  width: 100%;
  height: 140px;
  object-fit: cover;
}

.template-card p {
  margin: 0;
  padding: 14px;
  color: var(--text);
  font-size: 0.96rem;
}

.canvas-shell {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  background: #0b1120;
  border: 1px solid rgba(255,255,255,0.08);
}

#canvasHint {
  position: absolute;
  left: 18px;
  bottom: 18px;
  color: var(--muted);
  font-size: 0.92rem;
  z-index: 1;
}

canvas {
  width: 100%;
  display: block;
  background: #111827;
}

@media (max-width: 980px) {
  .editor-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hero {
    padding: 24px;
  }

  .hero-links a {
    width: 100%;
  }
}