:root {
  --bg: #040a14; --surface: #0b1829; --line: rgba(120,190,255,.16); --line-strong: rgba(120,220,255,.34);
  --text: #e6f1ff; --muted: #8aa3bf; --accent: #5ef0dc; --accent-2: #4aa8ff;
  --head: "Space Grotesk", system-ui, sans-serif; --body: "Inter", system-ui, sans-serif; --mono: "JetBrains Mono", monospace;
}
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100svh; display: grid; place-items: center; padding: 24px;
  background: radial-gradient(1200px 700px at 70% -10%, #0d2337, var(--bg) 60%), var(--bg);
  color: var(--text); font: 15px/1.55 var(--body);
}
.card { width: min(560px, 100%); border: 1px solid var(--line); border-radius: 24px; padding: 38px; background: rgba(11,24,41,.72); backdrop-filter: blur(14px); }
.eyebrow { color: var(--accent); font: 500 11px var(--mono); letter-spacing: .2em; text-transform: uppercase; margin: 0 0 14px; }
h1 { font: 700 clamp(28px, 5vw, 40px)/1.05 var(--head); margin: 0 0 14px; letter-spacing: -.02em; }
h1 span { background: linear-gradient(90deg, var(--accent), var(--accent-2) 70%, #9a7dff); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lead { color: var(--muted); margin: 0 0 26px; }
.field { display: grid; gap: 7px; font: 500 12px var(--mono); color: var(--muted); letter-spacing: .08em; text-transform: uppercase; }
.field input {
  background: rgba(2,8,16,.7); border: 1px solid var(--line); border-radius: 12px; padding: 13px 15px;
  color: var(--text); font: 16px var(--body); letter-spacing: normal;
}
.field input:focus { outline: none; border-color: var(--accent); }

.game { margin: 20px 0 22px; border: 1px solid var(--line); border-radius: 16px; overflow: hidden; }
.game-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 9px 13px; border-bottom: 1px solid var(--line); font-size: 12px; color: var(--muted); }
.game-head .mono { font-family: var(--mono); color: var(--accent); letter-spacing: .16em; font-size: 10.5px; }
.sea {
  position: relative; height: 190px; touch-action: none; cursor: grab;
  background:
    linear-gradient(180deg, #0a2036 0%, #0a2b45 45%, #08243c 100%),
    repeating-linear-gradient(90deg, transparent 0 38px, rgba(120,190,255,.05) 38px 39px);
}
.sea::after { content: ""; position: absolute; inset: auto 0 0 0; height: 46%; background: repeating-linear-gradient(0deg, rgba(120,200,255,.06) 0 2px, transparent 2px 9px); }
.sea.near .pad { border-color: var(--accent); box-shadow: 0 0 0 6px rgba(94,240,220,.14); }
.sea.done { background: linear-gradient(180deg, #0a2036, #0d3b3a 100%); }
.pad {
  position: absolute; width: 62px; height: 30px; margin: -15px 0 0 -31px; border: 2px dashed rgba(120,220,255,.5);
  border-radius: 50%; display: grid; place-items: center; transition: border-color .2s, box-shadow .2s;
}
.pad i { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 14px var(--accent); animation: blink 1.6s infinite; }
@keyframes blink { 50% { opacity: .25; } }
.drone { position: absolute; width: 56px; height: 38px; margin: -19px 0 0 -28px; color: var(--text); cursor: grab; touch-action: none; }
.drone svg { width: 100%; height: 100%; filter: drop-shadow(0 6px 14px rgba(0,0,0,.6)); }
.drone.flying { cursor: grabbing; color: var(--accent); }
.drone:focus-visible { outline: 2px solid var(--accent); outline-offset: 6px; border-radius: 10px; }
.sea.done .drone { color: var(--accent); transition: left .2s, top .2s; }

.btn {
  width: 100%; padding: 14px; border: 0; border-radius: 999px; background: var(--accent); color: #03141a;
  font: 600 15px var(--body); cursor: pointer; transition: opacity .2s, transform .2s;
}
.btn:disabled { opacity: .4; cursor: not-allowed; }
.btn:not(:disabled):hover { transform: translateY(-1px); }
.status { min-height: 1.4em; margin: 12px 0 0; font-size: 14px; color: var(--accent); }
.foot { margin: 26px 0 0; font-size: 10.5px; color: #58708c; letter-spacing: .04em; font-family: var(--mono); }
@media (max-width: 520px) { .card { padding: 26px 20px; } .sea { height: 170px; } }
.lock { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; margin-bottom: 18px;
  color: var(--accent); border: 1px solid var(--line-strong); background: rgba(94,240,220,.08); }
.lock svg { width: 21px; height: 21px; }