:root {
  --bg: #0f1117;
  --panel: #171923;
  --text: #e6e6e6;
  --muted: #9aa0aa;
  --primary: #5b9cff;
  --secondary: #2dd4bf;
  --danger: #ef4444;
  --border: #262a36;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, Noto Sans, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 800px at 20% 10%, #141827, var(--bg));
}

#app { min-height: 100%; display: flex; flex-direction: column; }
.app-header, .app-footer { padding: 12px 16px; background: #0b0d13; border-bottom: 1px solid var(--border); }
.app-footer { border-top: 1px solid var(--border); border-bottom: none; margin-top: auto; }
.app-header h1 { margin: 0; font-size: 20px; letter-spacing: 0.5px; }
.app-main { padding: 16px; max-width: 1200px; width: 100%; margin: 0 auto; }

.screen { display: none; }
.screen.active { display: block; }

.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 14px; }
.columns { display: grid; grid-template-columns: 1.5fr 1fr; gap: 16px; }
.left-column { display: grid; gap: 16px; }
.right-column { display: grid; gap: 16px; }

.log { min-height: 280px; max-height: 54vh; overflow: auto; white-space: pre-wrap; background: #121421; padding: 12px; border-radius: 10px; border: 1px solid var(--border); }
.actions { display: grid; gap: 8px; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); }

.buttons { display: flex; gap: 8px; flex-wrap: wrap; }
button { cursor: pointer; background: #1f2332; color: var(--text); border: 1px solid var(--border); padding: 10px 12px; border-radius: 8px; transition: transform 0.02s ease, background 0.2s ease, border 0.2s ease; }
button:hover { background: #23283a; }
button:active { transform: translateY(1px); }
button.primary { background: var(--primary); border-color: #3d7fe2; color: white; }
button.secondary { background: #1c3d37; border-color: #225e55; color: #b6fff3; }
button.danger { background: #3a1717; border-color: #5a1d1d; color: #ffb3b3; }

.stats h3, .inventory h3, .system h3 { margin-top: 0; }
.inventory ul, .inventory li { list-style: none; margin: 0; padding: 0; }
.inventory li { display: flex; justify-content: space-between; align-items: center; padding: 6px 8px; border: 1px solid var(--border); border-radius: 8px; margin-bottom: 6px; background: #0f1320; }
.inventory li .name { color: var(--text); }
.inventory li .qty { color: var(--muted); }

.msg { margin: 0 0 8px; color: var(--text); }
.msg .muted { color: var(--muted); }
.msg.success { color: #a7f3d0; }
.msg.warning { color: #fde68a; }
.msg.danger { color: #fecaca; }

@media (max-width: 900px) {
  .columns { grid-template-columns: 1fr; }
}