* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%); min-height: 100vh; }
.page-wrapper { display: grid; grid-template-columns: 160px 1fr 160px; gap: 20px; min-height: 100vh; max-width: 1400px; margin: 0 auto; padding: 20px; }
.sidebar { min-height: 100vh; }
.sidebar-left, .sidebar-right { display: flex; align-items: flex-start; padding-top: 80px; }
.sticky-ad { position: sticky; top: 20px; width: 160px; min-height: 600px; }
.main-content { display: flex; justify-content: center; align-items: flex-start; padding: 20px 0; }
@media (max-width: 1024px) { .page-wrapper { grid-template-columns: 1fr; } .sidebar { display: none; } }
.container { max-width: 480px; width: 100%; }
.header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.back-button { text-decoration: none; color: #fff; background: rgba(255,255,255,0.1); padding: 6px 14px; border-radius: 20px; font-size: 1em; }
.back-button:hover { background: rgba(255,255,255,0.2); }
.title { color: #fff; font-size: 1.6em; font-weight: 800; }
.stats-bar { display: flex; justify-content: space-between; background: rgba(255,255,255,0.08); border-radius: 14px; padding: 10px 16px; color: #a0c4ff; font-size: 1em; margin-bottom: 8px; }
.stats-bar strong { color: #fff; }
.hint-bar { color: rgba(255,255,255,0.5); font-size: 0.82em; text-align: center; margin-bottom: 10px; }
#pipeCanvas { display: block; margin: 0 auto; border-radius: 16px; border: 3px solid rgba(160,196,255,0.2); cursor: pointer; background: #1a1a2e; max-width: 100%; }
.controls-row { display: flex; gap: 12px; margin-top: 14px; justify-content: center; }
.ctrl-btn { background: rgba(255,255,255,0.1); color: #fff; border: 1px solid rgba(255,255,255,0.2); border-radius: 12px; padding: 10px 22px; font-size: 0.95em; font-weight: 600; cursor: pointer; transition: background 0.2s; }
.ctrl-btn:hover { background: rgba(255,255,255,0.2); }
.solve-btn { background: rgba(255,200,0,0.15); border-color: rgba(255,200,0,0.3); color: #ffd700; }
.level-complete { background: rgba(255,255,255,0.05); border: 2px solid rgba(160,196,255,0.3); border-radius: 20px; padding: 28px 24px; text-align: center; margin-top: 16px; }
.lc-icon { font-size: 2.5em; margin-bottom: 8px; }
.lc-msg { color: #fff; font-size: 1.1em; font-weight: 700; margin-bottom: 16px; }
.next-level-btn { background: linear-gradient(135deg, #a0c4ff, #0f3460); color: #fff; border: none; border-radius: 12px; padding: 12px 28px; font-size: 1em; font-weight: 700; cursor: pointer; }
.hidden { display: none; }