:root{--bg: #05060a;--fg: #e6e9f0;--accent: #06b6d4;--accent2: #c084fc;--danger: #ef4444;--success: #22c55e;--warn: #f59e0b;--panel: rgba(8,10,18,.95);--border: rgba(255,255,255,.08);--font: "Inter", system-ui, sans-serif;--mono: "JetBrains Mono", monospace}*{box-sizing:border-box;margin:0;padding:0}html,body{width:100%;height:100%;background:var(--bg);color:var(--fg);font-family:var(--font);overflow:hidden}#game-root{position:relative;width:100vw;height:100vh}#game-canvas{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;display:block;cursor:crosshair}#ui-layer,#hud-layer{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}#hud-layer>*{pointer-events:auto}#hud-top{position:absolute;top:0;left:0;right:0;display:flex;justify-content:space-between;align-items:center;padding:12px 20px;background:linear-gradient(to bottom,rgba(0,0,0,.6),transparent);font-family:var(--mono);font-size:13px}#hud-tier{color:var(--accent);font-weight:700;text-transform:uppercase;letter-spacing:.05em}#hud-score{color:gold;font-weight:700}#hud-score:before{content:"★ "}#hud-crystals{color:#0ff;font-weight:700}#hud-crystals:before{content:"◆ "}#hud-bottom{position:absolute;bottom:0;left:0;right:0;display:flex;align-items:center;gap:16px;padding:14px 20px;background:linear-gradient(to top,rgba(0,0,0,.7),transparent)}.bar{width:140px;height:10px;background:#ffffff14;border-radius:5px;overflow:hidden;border:1px solid var(--border)}.fill{height:100%;width:100%;transition:width .2s}#hp-fill{background:linear-gradient(90deg,var(--danger),var(--warn))}#shield-fill{background:linear-gradient(90deg,#48f,#6af)}#energy-fill{background:linear-gradient(90deg,var(--accent),var(--accent2))}#hud-hp,#hud-energy,#hud-shield{display:flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11px;color:#e6e9f099}#station-hint{position:absolute;bottom:60px;left:50%;transform:translate(-50%);background:#000c;border:1px solid var(--accent);color:var(--accent);padding:8px 16px;border-radius:6px;font-family:var(--mono);font-size:12px;display:none}#hud-minimap{position:absolute;top:60px;right:16px;width:160px;height:160px;background:#00000080;border:1px solid var(--border);border-radius:8px;overflow:hidden}#message-log{position:absolute;top:60px;left:16px;width:260px;font-family:var(--mono);font-size:11px;color:#e6e9f099;pointer-events:none;display:flex;flex-direction:column;gap:3px}.log-line{background:#0006;padding:3px 8px;border-radius:4px;border-left:2px solid var(--accent)}.overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:var(--panel);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;flex-direction:column;pointer-events:auto;z-index:10}.overlay.hidden{display:none!important}.overlay-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--border)}.overlay-header h2{font-family:var(--font);font-size:18px;font-weight:700;color:var(--accent)}.overlay-header button{background:none;border:none;color:var(--fg);font-size:20px;cursor:pointer}.panel-body{padding:20px;flex:1;overflow-y:auto}#upgrade-options{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}.upgrade-card{background:#ffffff08;border:1px solid var(--border);border-radius:10px;padding:16px;display:flex;flex-direction:column;gap:8px}.upgrade-card h4{font-size:15px}.upgrade-card .cost{font-family:var(--mono);font-size:12px}.upgrade-card button{margin-top:4px;padding:10px 14px;background:var(--accent);color:#000;border:none;border-radius:6px;font-weight:700;font-size:13px;cursor:pointer;transition:all .15s}.upgrade-card button:hover{background:#08d4f4}.upgrade-card button:disabled{opacity:.4;cursor:not-allowed;background:#555;color:#aaa}#start-screen{position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(ellipse at 50% 30%,rgba(6,182,212,.08),transparent 60%),radial-gradient(ellipse at 70% 80%,rgba(192,132,252,.06),transparent 60%),#05060a;display:flex;align-items:center;justify-content:center;z-index:20;pointer-events:auto}.start-content{text-align:center;max-width:520px;padding:20px}.start-content h1{font-size:64px;font-weight:800;letter-spacing:-.04em;line-height:1;background:linear-gradient(135deg,#fff 0%,var(--accent) 60%,var(--accent2) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:12px}.tagline{font-size:18px;color:#e6e9f0b3;margin-bottom:32px}.cta{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#000;border:none;padding:16px 40px;font-size:18px;font-weight:800;border-radius:12px;cursor:pointer;box-shadow:0 0 40px #06b6d44d;transition:transform .15s,box-shadow .15s}.cta:hover{transform:translateY(-2px);box-shadow:0 0 60px #06b6d473}.controls-hint{margin-top:28px;font-family:var(--mono);font-size:12px;color:#e6e9f066}.toast{position:absolute;top:60px;left:50%;transform:translate(-50%);background:#000c;border:1px solid var(--accent);color:var(--fg);padding:10px 20px;border-radius:8px;font-family:var(--mono);font-size:12px;pointer-events:none;opacity:0;transition:opacity .3s}.toast.show{opacity:1}