:root {
  --bg-a: #060d1b;
  --bg-b: #0b1529;
  --bg-c: #0f1d38;
  --panel: rgba(13, 29, 52, 0.78);
  --panel-edge: rgba(109, 188, 255, 0.28);
  --ink: #d8eeff;
  --ink-soft: #89a9c7;
  --accent: #33d6ff;
  --accent-2: #66ffd3;
  --accent-danger: #ff5d8a;
  --line: rgba(106, 166, 218, 0.34);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 8%, rgba(36, 132, 218, 0.3) 0%, transparent 36%),
    radial-gradient(circle at 88% 82%, rgba(78, 106, 255, 0.22) 0%, transparent 42%),
    linear-gradient(165deg, var(--bg-a), var(--bg-b) 56%, var(--bg-c));
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

.layout {
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(240px, 1fr) minmax(520px, 2fr) minmax(240px, 1fr);
  padding: 18px;
}

.panel,
.game-panel {
  border: 1px solid var(--panel-edge);
  border-radius: 14px;
  background: var(--panel);
  backdrop-filter: blur(10px);
  box-shadow:
    inset 0 0 0 1px rgba(165, 224, 255, 0.06),
    0 10px 34px rgba(0, 0, 0, 0.4),
    0 0 24px rgba(40, 166, 255, 0.12);
}

.panel {
  display: flex;
  flex-direction: column;
  padding: 12px;
}

h2 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #ecf7ff;
  text-shadow: 0 0 10px rgba(58, 203, 255, 0.34);
}

textarea {
  width: 100%;
  min-height: 410px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 10px;
  background:
    linear-gradient(180deg, rgba(8, 20, 39, 0.95), rgba(7, 17, 34, 0.98));
  color: #d6f1ff;
  padding: 12px;
  line-height: 1.4;
  font-family: Consolas, "Courier New", monospace;
  font-size: 14px;
  box-shadow:
    inset 0 0 0 1px rgba(120, 213, 255, 0.08),
    inset 0 0 18px rgba(0, 139, 214, 0.16);
}

#aiPrompt {
  min-height: 110px;
}

textarea[readonly] {
  opacity: 0.9;
  cursor: not-allowed;
}

textarea:focus {
  outline: none;
  border-color: rgba(84, 223, 255, 0.78);
  box-shadow:
    0 0 0 2px rgba(28, 153, 209, 0.34),
    inset 0 0 22px rgba(0, 180, 255, 0.2);
}

.controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
  gap: 8px;
}

.sub-title {
  margin-top: 14px;
}

.readonly-note {
  margin: 8px 0 0;
  font-size: 12px;
  color: var(--ink-soft);
}

.field {
  margin: 2px 0 6px;
  color: #cfe6ff;
  font-size: 13px;
}

select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 10px;
  background: rgba(7, 20, 38, 0.95);
  color: #d7efff;
}

select:focus {
  outline: none;
  border-color: rgba(84, 223, 255, 0.78);
  box-shadow: 0 0 0 2px rgba(28, 153, 209, 0.34);
}

.stage-info {
  margin-top: 10px;
  padding: 10px;
  border: 1px solid rgba(140, 210, 255, 0.22);
  border-radius: 10px;
  background: rgba(8, 27, 47, 0.65);
  color: #b8d8f6;
  line-height: 1.5;
  min-height: 96px;
}

.stage-info strong {
  color: #e7f6ff;
}

.progress-box {
  margin-top: 12px;
  border: 1px solid rgba(140, 210, 255, 0.22);
  border-radius: 10px;
  padding: 10px;
  line-height: 1.6;
  color: #c5def8;
  background: rgba(8, 24, 42, 0.6);
}

button {
  border: 1px solid rgba(104, 240, 255, 0.44);
  border-radius: 10px;
  padding: 10px 14px;
  font-weight: 700;
  cursor: pointer;
  color: #031627;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow:
    0 0 0 1px rgba(148, 247, 255, 0.2),
    0 8px 16px rgba(11, 159, 201, 0.24);
  transition: transform 0.14s ease, box-shadow 0.14s ease, filter 0.14s ease;
}

button:hover {
  transform: translateY(-1px);
  filter: brightness(1.06);
  box-shadow:
    0 0 0 1px rgba(148, 247, 255, 0.34),
    0 10px 24px rgba(11, 159, 201, 0.34);
}

button:active {
  transform: translateY(0);
}

.status {
  color: var(--ink-soft);
  font-size: 13px;
}

.status.ok {
  color: #75ffd5;
}

.status.err {
  color: var(--accent-danger);
}

.game-panel {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px;
}

.scoreboard {
  width: 100%;
  display: flex;
  justify-content: space-around;
  font-size: 22px;
  font-weight: 700;
  color: #ddf2ff;
  margin: 4px 0 10px;
  text-shadow: 0 0 12px rgba(80, 202, 255, 0.4);
}

canvas {
  width: min(100%, 900px);
  height: auto;
  border: 2px solid rgba(118, 207, 255, 0.42);
  border-radius: 10px;
  background:
    linear-gradient(90deg, transparent 49.8%, rgba(117, 208, 255, 0.36) 49.8%, rgba(117, 208, 255, 0.36) 50.2%, transparent 50.2%),
    linear-gradient(0deg, rgba(112, 214, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(112, 214, 255, 0.05) 1px, transparent 1px),
    #041324;
  background-size: auto, 24px 24px, 24px 24px, auto;
  box-shadow:
    inset 0 0 40px rgba(15, 80, 135, 0.44),
    0 0 22px rgba(57, 186, 255, 0.24);
}

.hint {
  margin: 10px 0 4px;
  font-size: 14px;
  color: #8fb2d0;
}

.hint code {
  color: #b4f2ff;
  background: rgba(50, 92, 138, 0.3);
  border: 1px solid rgba(140, 210, 255, 0.24);
  border-radius: 6px;
  padding: 1px 6px;
}

@media (max-width: 1160px) {
  .layout {
    grid-template-columns: 1fr;
  }

  textarea {
    min-height: 220px;
  }
}

.ai-dialog {
  width: min(960px, 92vw);
  border: 1px solid var(--panel-edge);
  border-radius: 12px;
  background: rgba(7, 20, 38, 0.98);
  color: var(--ink);
  padding: 14px;
}

.ai-dialog::backdrop {
  background: rgba(3, 8, 16, 0.7);
}

.ai-dialog h3 {
  margin: 0 0 10px;
}

.ai-dialog-section {
  margin: 8px 0;
}

.ai-dialog-section label {
  display: block;
  margin-bottom: 6px;
  color: #cfe6ff;
  font-size: 13px;
}

.ai-dialog-section textarea {
  min-height: 140px;
  max-height: 240px;
}