:root {
  --bg: #07071a;
  --surf: #0f0f2e;
  --surf2: #181838;
  --cyan: #3ff0d0;
  --pink: #ff6eaa;
  --yellow: #ffd060;
  --green: #40e87a;
  --text: #d8d8ff;
  --muted: #5a6090;
  --r: 10px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Share Tech Mono', monospace;
  background: var(--bg);
  color: var(--text);
  height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hidden { display: none !important; }

/* ── Logo ── */
.logo {
  font-family: 'Orbitron', sans-serif;
  font-size: 3.8rem;
  font-weight: 900;
  color: var(--cyan);
  text-shadow: 0 0 30px rgba(63,240,208,.5);
  letter-spacing: .06em;
}
.logo span { color: var(--pink); }

.logo-sub {
  font-size: .78rem;
  color: var(--muted);
  letter-spacing: .06em;
  text-align: center;
}

/* ── Menu ── */
.menu-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.1rem;
  max-width: 500px;
  width: 100%;
  padding: 2rem 1.5rem;
}

.seed-wrap { width: 100%; }
.seed-wrap label {
  display: block;
  font-size: .72rem;
  color: var(--muted);
  letter-spacing: .12em;
  margin-bottom: .4rem;
}

.seed-row { display: flex; gap: .5rem; }

#seedInput {
  flex: 1;
  background: var(--surf2);
  border: 1.5px solid rgba(63,240,208,.25);
  border-radius: var(--r);
  color: var(--cyan);
  font-family: 'Orbitron', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  padding: .7rem 1rem;
  outline: none;
  letter-spacing: .08em;
  transition: border-color .2s;
}
#seedInput:focus { border-color: var(--cyan); }
#seedInput::placeholder { color: var(--muted); font-family: 'Share Tech Mono', monospace; font-size: .85rem; font-weight: 400; letter-spacing: .04em; }

.btn-icon {
  background: var(--surf2);
  border: 1.5px solid rgba(63,240,208,.2);
  border-radius: var(--r);
  color: var(--text);
  font-size: 1.2rem;
  width: 48px;
  cursor: pointer;
  transition: background .2s;
}
.btn-icon:hover { background: var(--surf); border-color: var(--cyan); }

.btn-primary {
  background: linear-gradient(135deg, var(--cyan), #20b8ff);
  border: none;
  border-radius: var(--r);
  color: #000;
  font-family: 'Orbitron', sans-serif;
  font-weight: 900;
  font-size: 1rem;
  letter-spacing: .15em;
  padding: .85rem 0;
  cursor: pointer;
  width: 100%;
  box-shadow: 0 4px 20px rgba(63,240,208,.35);
  transition: transform .15s, box-shadow .15s;
}
.btn-primary:hover { transform: scale(1.02); box-shadow: 0 6px 28px rgba(63,240,208,.55); }
.btn-primary:active { transform: scale(.97); }

.btn-secondary {
  background: transparent;
  border: 1.5px solid var(--cyan);
  border-radius: var(--r);
  color: var(--cyan);
  font-family: 'Share Tech Mono', monospace;
  font-size: .85rem;
  padding: .6rem 1.2rem;
  cursor: pointer;
  transition: background .2s;
}
.btn-secondary:hover { background: rgba(63,240,208,.1); }

.btn-ghost {
  background: transparent;
  border: 1.5px solid rgba(255,255,255,.12);
  border-radius: var(--r);
  color: var(--muted);
  font-family: 'Share Tech Mono', monospace;
  font-size: .85rem;
  padding: .6rem 1.2rem;
  cursor: pointer;
  transition: border-color .2s, color .2s;
}
.btn-ghost:hover { border-color: rgba(255,255,255,.35); color: var(--text); }

.how-to {
  background: var(--surf);
  border-radius: var(--r);
  padding: .9rem 1.2rem;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .35rem .8rem;
  font-size: .78rem;
  color: var(--muted);
}
.tip {
  grid-column: 1/-1;
  color: var(--yellow);
  font-size: .76rem;
  text-align: center;
  margin-top: .15rem;
}

kbd {
  background: rgba(63,240,208,.1);
  border: 1px solid rgba(63,240,208,.3);
  border-radius: 4px;
  padding: .1rem .35rem;
  font-family: inherit;
  color: var(--cyan);
  font-size: .74rem;
}

.recent-list {
  width: 100%;
  font-size: .78rem;
  color: var(--muted);
}
.recent-list .rl-title {
  letter-spacing: .1em;
  margin-bottom: .4rem;
}
.recent-item {
  display: flex;
  justify-content: space-between;
  padding: .3rem .6rem;
  border-radius: 6px;
  cursor: pointer;
  transition: background .15s;
}
.recent-item:hover { background: var(--surf2); color: var(--text); }
.recent-item .ri-seed { color: var(--cyan); }
.recent-item .ri-pb   { color: var(--yellow); }

/* ── HUD ── */
#gameScreen { flex-direction: column; background: #000; }

#hud {
  position: absolute;
  top: 0; left: 0; right: 0;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: .5rem .9rem;
  z-index: 10;
  pointer-events: none;
  background: linear-gradient(to bottom, rgba(0,0,0,.7), transparent);
}
#hudLeft, #hudRight { flex: 1; font-size: .82rem; }
#hudRight { text-align: right; color: var(--muted); font-size: .75rem; }
#hudCenter { text-align: center; }

#hudTimer {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--cyan);
  text-shadow: 0 0 12px rgba(63,240,208,.6);
  line-height: 1;
}
#hudPb { font-size: .7rem; color: var(--muted); margin-top: .15rem; }
#hudDeaths { color: var(--pink); }

#canvas { display: block; }

#hint {
  position: absolute;
  bottom: .6rem;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,.55);
  color: var(--muted);
  font-size: .68rem;
  padding: .35rem .85rem;
  border-radius: 50px;
  pointer-events: none;
  white-space: nowrap;
  transition: opacity 1.5s;
}

/* ── Finish ── */
.finish-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .75rem;
  max-width: 440px;
  width: 95%;
  padding: 2.2rem 2rem;
  background: var(--surf);
  border-radius: 20px;
  border: 1px solid rgba(63,240,208,.2);
  box-shadow: 0 24px 80px rgba(0,0,0,.7);
}
.fin-emoji { font-size: 3rem; line-height: 1; }
.fin-label {
  font-family: 'Orbitron', sans-serif;
  font-size: 2rem;
  font-weight: 900;
  color: var(--green);
  text-shadow: 0 0 18px rgba(64,232,122,.5);
}
.fin-time {
  font-family: 'Orbitron', sans-serif;
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--cyan);
  text-shadow: 0 0 18px rgba(63,240,208,.55);
}
.fin-pb   { font-size: .88rem; color: var(--yellow); min-height: 1.2em; }
.fin-meta { font-size: .8rem; color: var(--muted); }

.fin-btns {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  justify-content: center;
  width: 100%;
}

.leaderboard {
  width: 100%;
  border-top: 1px solid rgba(255,255,255,.07);
  padding-top: .7rem;
}
.lb-head {
  font-size: .7rem;
  color: var(--muted);
  letter-spacing: .1em;
  margin-bottom: .45rem;
}
.lb-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .8rem;
  padding: .22rem 0;
  border-bottom: 1px solid rgba(255,255,255,.04);
}
.lb-row:nth-child(1) { color: var(--yellow); }
.lb-row:nth-child(2) { color: #c0c0c0; }
.lb-row:nth-child(3) { color: #cd7f32; }
.lb-rank { width: 1.5rem; color: var(--muted); }
.lb-time { font-family: 'Orbitron', sans-serif; font-size: .75rem; }
.lb-deaths { color: var(--muted); font-size: .72rem; }
.lb-new { color: var(--green); font-size: .7rem; margin-left: .4rem; }

@media (max-width: 540px) {
  .logo { font-size: 2.5rem; }
  #hudTimer { font-size: 1.2rem; }
  .fin-time { font-size: 2rem; }
}