:root {
  --bg: #0b0f14;
  --panel: #132034;
  --panel-2: #0f1a29;
  --line: #29415e;
  --line-strong: #446587;
  --text: #e7eef8;
  --muted: #9cb0c6;
  --accent: #55c5ff;
  --accent-2: #93f7cd;
  --warn: #ffd36b;
  --danger: #ff8888;
  --shadow: rgba(0, 0, 0, 0.32);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(1100px 640px at 10% -10%, #183454 0%, transparent 55%),
    radial-gradient(900px 520px at 100% 0%, #12263a 0%, transparent 45%),
    linear-gradient(180deg, #0a0e14, #0b1118 50%, #091018);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button {
  font: inherit;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.shell {
  width: min(1500px, calc(100vw - 20px));
  margin: 10px auto 18px;
  display: grid;
  gap: 10px;
}

.breadcrumb,
.top,
.hud,
.tower-controls,
.canvas-wrap,
.footer-nav {
  background: linear-gradient(180deg, rgba(19, 32, 52, 0.96), rgba(12, 20, 31, 0.98));
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 14px 34px var(--shadow);
}

.breadcrumb {
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
}

.top {
  padding: 14px 16px;
}

.top h1 {
  margin: 0;
  font-size: 28px;
  line-height: 1;
}

.hud {
  padding: 12px 14px;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 8px;
  align-items: stretch;
}

.stat {
  min-height: 54px;
  border: 1px solid rgba(68, 101, 135, 0.45);
  background: linear-gradient(180deg, rgba(15, 26, 41, 0.92), rgba(10, 18, 29, 0.96));
  border-radius: 14px;
  padding: 8px 10px;
  display: grid;
  gap: 4px;
  align-content: center;
}

.stat span {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.stat strong {
  font-size: 16px;
  line-height: 1.1;
  overflow-wrap: anywhere;
}

.btn-primary,
.btn-ghost,
.tower-btn {
  min-height: 42px;
  padding: 0 14px;
  border-radius: 12px;
  border: 1px solid var(--line-strong);
  color: var(--text);
  cursor: pointer;
  transition: border-color 120ms ease, transform 120ms ease, opacity 120ms ease;
}

.btn-primary:hover,
.btn-ghost:hover,
.tower-btn:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.btn-primary:disabled,
.btn-ghost:disabled,
.tower-btn:disabled {
  opacity: 0.45;
  cursor: default;
  transform: none;
}

.btn-primary {
  background: linear-gradient(180deg, #1f466d, #173251);
}

.btn-ghost,
.tower-btn {
  background: linear-gradient(180deg, #17304b, #11253a);
}

.tower-btn.is-active {
  border-color: var(--accent-2);
  box-shadow: inset 0 0 0 1px rgba(147, 247, 205, 0.45);
}

.tower-controls {
  padding: 12px 14px;
  display: grid;
  gap: 10px;
}

.tower-actions,
.tower-pick {
  display: grid;
  gap: 10px;
}

.tower-actions {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tower-pick {
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.canvas-wrap {
  padding: 10px;
}

canvas {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 14px;
  border: 1px solid rgba(68, 101, 135, 0.45);
  background:
    radial-gradient(900px 540px at 20% 15%, rgba(32, 71, 112, 0.22), transparent 55%),
    linear-gradient(180deg, #0d1724, #09111a);
}

.message {
  margin: 0;
  padding: 0 4px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.4;
}

.message.warning {
  color: var(--warn);
}

.footer-nav {
  padding: 12px 14px;
  display: flex;
  justify-content: flex-start;
  align-items: center;
}

.link-btn {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 14px;
  border-radius: 12px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, #17304b, #11253a);
  color: var(--text);
  text-decoration: none;
}

.link-btn:hover {
  border-color: var(--accent);
  text-decoration: none;
}

.link-back {
  white-space: nowrap;
}

@media (max-width: 1150px) {
  .hud {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .tower-pick {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .shell {
    width: min(100vw - 10px, 100%);
    margin: 6px auto 12px;
  }

  .top h1 {
    font-size: 24px;
  }

  .hud {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tower-actions,
  .tower-pick {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .breadcrumb {
    flex-wrap: wrap;
  }
}