:root {
  --bg: #0f172a;
  --panel: #111827;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --border: rgba(148, 163, 184, 0.2);
  font-family: "Inter", "PingFang TC", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(145deg, #020617 0%, #1e293b 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
}

.container {
  width: min(1200px, 100%);
  background: var(--panel);
  border-radius: 20px;
  padding: 32px;
  box-shadow: 0 30px 80px rgba(15, 23, 42, 0.45);
  display: flex;
  flex-direction: column;
  gap: 32px;
}

header h1 {
  margin: 0 0 12px;
  font-size: 1.8rem;
  letter-spacing: 0.04em;
}

header p {
  margin: 0;
  color: var(--muted);
}

.controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  padding: 24px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border);
  border-radius: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

label {
  font-weight: 600;
  letter-spacing: 0.05em;
}

input[type="file"],
select {
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  color: var(--text);
  font-size: 0.95rem;
  box-shadow: inset 0 1px 0 rgba(148, 163, 184, 0.12);
}

input[type="file"] {
  padding: 8px;
}

textarea {
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  color: var(--text);
  font-size: 0.95rem;
  font-family: 'Baloo 2', 'Fredoka', 'Comic Sans MS', cursive;
  min-height: 120px;
  resize: vertical;
}

input[type="file"]::-webkit-file-upload-button {
  background: var(--accent);
  color: #02121f;
  border: none;
  border-radius: 8px;
  padding: 8px 12px;
  font-weight: 600;
  margin-right: 12px;
  cursor: pointer;
}

input[type="file"]::file-selector-button {
  background: var(--accent);
  color: #02121f;
  border: none;
  border-radius: 8px;
  padding: 8px 12px;
  font-weight: 600;
  margin-right: 12px;
  cursor: pointer;
}

.actions {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 12px 16px;
  align-items: stretch;
}

.actions button,
.actions .button {
  display: inline-flex;
  width: 100%;
  justify-content: center;
}

button,
.button {
  background: var(--accent);
  color: #02121f;
  border: none;
  border-radius: 999px;
  padding: 10px;
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform 120ms ease, box-shadow 120ms ease;
  min-width: 128px;
  min-height: 44px;
  line-height: 1.2;
  word-wrap: break-word;
  overflow-wrap: break-word;
  text-align: center;
  hyphens: auto;
}

button[disabled],
button[aria-disabled="true"],
.button[aria-disabled="true"] {
  background: rgba(148, 163, 184, 0.2);
  color: rgba(226, 232, 240, 0.4);
  cursor: not-allowed;
  box-shadow: none;
  pointer-events: none;
}

button:not([disabled]):not([aria-disabled="true"]):hover,
.button[aria-disabled="false"]:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 25px rgba(56, 189, 248, 0.35);
}

.hint {
  margin: 0;
  font-size: 0.8rem;
  color: var(--muted);
}

.status {
  grid-column: 1 / -1;
  margin: 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.preview {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.pane {
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.pane h2 {
  margin: 0;
  font-size: 1.1rem;
}

#previewCanvas,
#outputImage {
  width: 100%;
  height: auto;
  border-radius: 12px;
  background: rgba(2, 6, 23, 0.6);
}

.design {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.design-fields {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.design-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.design-field {
  flex: 1;
  min-width: 140px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

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

#designCanvas {
  width: 100%;
  height: auto;
  border-radius: 20px;
  background: rgba(2, 6, 23, 0.4);
  box-shadow: inset 0 0 0 1px rgba(148, 163, 184, 0.1);
}

.design-pane {
  gap: 20px;
}

@media (max-width: 768px) {
  body {
    padding: 16px;
  }

  .container {
    padding: 24px;
  }

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