:root {
  --darkest: #1a1a2e;
  --darker: #16213e;
  --dark: #0f3460;
  --highlight: #fbbf24;
  --light: #213555;
}

/* ===== Base layout ===== */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }

body {
  background: var(--darkest);
  color: #e5e7eb;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

hr {
  display: none;
  width: 98%;
  color: var(--dark);
}

#app {
  min-height: 100vh;
  max-width: 1100px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

header { text-align: center; margin-bottom: 0.25rem; }
#title {
  margin: 0;
  font-size: 2.1rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #f9fafb;
}
#subtitle {
  margin: 0.5rem 0 0;
  color: #cbd5f5;
  font-size: 0.95rem;
  opacity: 0.95;
}

/* ===== Card ===== */
.card {
  background: var(--darker);
  border-radius: 1rem;
  padding: 1.5rem;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(148, 163, 184, 0.2);
}

.grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: 1fr;
}
@media (min-width: 900px) {
  .grid { grid-template-columns: 1.1fr 0.9fr; align-items: start; }
}

/* ===== Controls ===== */
.panel {
  background: var(--dark);
  border-radius: 0.75rem;
  padding: 1.25rem;
  border: 1px solid rgba(148, 163, 184, 0.3);
}

.section-title {
  margin: 0 0 0.85rem;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #f9fafb;
  opacity: 0.95;
}

.subsection-mod {
  text-transform: none;
}

.form {
  display: grid;
  gap: 0.9rem;
}

.field {
   display: flex; flex-direction: column; gap: 0.35rem;
   border-top: 1px solid var(--darkest);
   padding: 8px 0px;
}

.field:first-child {
  border: none;
}

label { font-size: 0.9rem; font-weight: 600; color: #e5e7eb; }

input[type="text"],
select,
input[type="file"] {
  width: 100%;
  background: var(--darkest);
  border-radius: 0.5rem;
  border: 1px solid rgba(148, 163, 184, 0.6);
  color: #e5e7eb;
  padding: 0.55rem 0.75rem;
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

input[type="text"]::placeholder { color: #6b7280; }

input[type="text"]:focus, select:focus, input[type="file"]:focus {
  border-color: var(--highlight);
  box-shadow: 0 0 0 1px rgba(251, 191, 36, 0.2);
  background: #02081e;
}

.range-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  align-items: center;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--highlight);
}

.hint {
  margin: 0;
  font-size: 0.82rem;
  color: #9ca3af;
  line-height: 1.35;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  background: rgba(2, 6, 23, 0.35);
  border: 1px solid rgba(148, 163, 184, 0.25);
  font-size: 0.8rem;
  color: #e5e7eb;

  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: pre;
}

/* Buttons */
.btn-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin-top: 0.25rem;
}

button {
  border: none;
  border-radius: 999px;
  padding: 0.65rem 1.4rem;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  background: var(--highlight);
  color: var(--darkest);
  transition: transform 0.1s ease, box-shadow 0.1s ease, background 0.1s ease, opacity 0.1s ease;
}

button:hover {
  background: #f59e0b;
  box-shadow: 0 10px 18px rgba(0, 0, 0, 0.35);
  transform: translateY(-1px);
}
button:active {
  transform: translateY(0);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.4);
}
button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* Preview */
.preview-wrap {
  display: grid;
  gap: 0.9rem;
  align-self: center;
}

.canvas-card {
  background: rgba(2, 6, 23, 0.35);
  border: 1px solid rgba(148, 163, 184, 0.25);
  border-radius: 0.75rem;
  padding: 0.3rem;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 0.5rem;
  border: 1px solid rgba(148, 163, 184, 0.25);
  image-rendering: pixelated;
  background: #000;
}

.status {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}