:root {
  --accent: #38e1ff;
  --accent-2: #7b5cff;
  --danger: #ff4d6d;
  --good: #5cffab;
  --panel: rgba(12, 18, 34, 0.82);
  --panel-line: rgba(120, 180, 255, 0.22);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: #05060d;
  font-family: "Segoe UI", system-ui, sans-serif;
  color: #dfe9ff;
  user-select: none;
  -webkit-user-select: none;
}

/* ---------- Viewport & the game canvas ----------
   The whole game world is drawn on #game-canvas (render.js). The viewport
   gradient only shows in the letterbox bars outside the fitted canvas. */
#viewport {
  position: fixed;
  inset: 0;
  overflow: hidden;
  background:
    radial-gradient(1200px 820px at 20% 16%, rgba(96,44,168,0.30), transparent 60%),
    radial-gradient(1400px 1000px at 84% 80%, rgba(24,96,150,0.32), transparent 62%),
    radial-gradient(1000px 760px at 70% 24%, rgba(168,44,120,0.20), transparent 60%),
    radial-gradient(900px 700px at 30% 82%, rgba(40,150,140,0.16), transparent 60%),
    radial-gradient(1700px 1300px at 50% 48%, #0d1730 0%, #070c17 55%, #03040a 100%);
}

#game-canvas {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  /* width/height are set by render.js to fit the window at the world's
     aspect ratio; the backing store is sized for the devicePixelRatio */
}

/* ---------- HUD ---------- */
#hud {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 100;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
#hud-top {
  display: flex;
  gap: 14px;
  padding: 16px;
  align-items: stretch;
}
#hud-top-left {
  display: flex;
  gap: 14px;
  flex: 1;
  min-width: 0;
  align-items: stretch;
}
#pause-btn {
  pointer-events: auto;
  flex: 0 0 auto;
  width: 68px;
  font-family: inherit;
  font-size: 22px;
  font-weight: 800;
  color: #eaf1ff;
  background: var(--panel);
  border: 1px solid var(--panel-line);
  border-radius: 12px;
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: transform 0.08s, border-color 0.15s, box-shadow 0.15s, color 0.15s;
}
#pause-btn:hover { transform: translateY(-2px); border-color: var(--accent); box-shadow: 0 0 18px rgba(56,225,255,0.3); }
#pause-btn:active { transform: translateY(0); }
#pause-btn.paused { color: var(--good); border-color: rgba(92,255,171,0.6); box-shadow: 0 0 18px rgba(92,255,171,0.3); }

#pause-indicator {
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  font-size: 84px;
  font-weight: 900;
  letter-spacing: 10px;
  color: #fff;
  text-shadow: 0 0 40px var(--accent);
  opacity: 0;
  display: none;
  z-index: 150;
  animation: pausePulse 1.6s ease-in-out infinite;
}
#pause-indicator.show { display: block; opacity: 1; }

/* Pause menu (dev settings live inside it) */

#settings-menu {
  position: absolute;
  top: 92px; left: 50%;
  transform: translateX(-50%);
  pointer-events: auto;
  z-index: 180;
  width: 280px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px;
  background: var(--panel);
  border: 1px solid var(--panel-line);
  border-radius: 14px;
  backdrop-filter: blur(10px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.6);
}
#settings-menu.hidden { display: none; }
.settings-title { font-size: 12px; letter-spacing: 2px; color: #9fb4e0; text-align: center; margin-bottom: 2px; }
.settings-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; font-size: 14px; }
.settings-btns { display: flex; gap: 8px; }
#settings-menu button {
  font-family: inherit;
  font-weight: 700;
  color: #eaf1ff;
  background: linear-gradient(180deg, rgba(40,56,96,0.7), rgba(20,28,52,0.7));
  border: 1px solid var(--panel-line);
  border-radius: 9px;
  padding: 8px 12px;
  cursor: pointer;
  transition: transform 0.08s, border-color 0.15s, box-shadow 0.15s;
}
#settings-menu button:hover { transform: translateY(-1px); border-color: var(--accent); box-shadow: 0 0 14px rgba(56,225,255,0.25); }
.settings-action { text-align: center; }
#settings-menu button.danger { border-color: rgba(255,77,109,0.55); color: #ffd0d8; }
#settings-menu button.danger:hover { border-color: var(--danger); box-shadow: 0 0 14px rgba(255,77,109,0.35); }

/* --- Leaderboard panel --- */
#leaderboard-panel {
  position: absolute;
  top: 92px; left: 50%;
  transform: translateX(-50%);
  pointer-events: auto;
  z-index: 210;   /* above the game-over overlay (200) so it opens on top */
  width: min(460px, 92vw);
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px;
  background: linear-gradient(180deg, rgba(16,24,48,0.96), rgba(10,16,34,0.96));
  border: 1px solid var(--panel-line);
  border-radius: 14px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.5);
  backdrop-filter: blur(6px);
}
#leaderboard-panel.hidden { display: none; }
.lb-head { display: flex; align-items: center; justify-content: space-between; }
.lb-close {
  pointer-events: auto;
  font-family: inherit;
  font-size: 14px;
  font-weight: 800;
  color: #9fb4e0;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--panel-line);
  border-radius: 8px;
  width: 28px; height: 28px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.lb-close:hover { color: #eaf1ff; border-color: var(--accent); }
.lb-tabs { display: flex; flex-wrap: wrap; gap: 6px; }
.lb-tab {
  pointer-events: auto;
  touch-action: manipulation;
  font-family: inherit;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: #9fb4e0;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--panel-line);
  border-radius: 8px;
  padding: 6px 12px;
  cursor: pointer;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
}
.lb-tab:hover { color: #eaf1ff; }
.lb-tab.active {
  color: #04121a;
  background: linear-gradient(180deg, #8ff2ff, var(--accent));
  border-color: var(--accent);
}
.lb-body { max-height: min(52vh, 460px); overflow-y: auto; }
.lb-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.lb-table thead th {
  position: sticky; top: 0;
  background: rgba(16,24,48,0.98);
  color: #9fb4e0;
  font-size: 11px;
  letter-spacing: 1px;
  text-transform: uppercase;
  text-align: left;
  padding: 6px 8px;
  border-bottom: 1px solid var(--panel-line);
}
.lb-table td {
  padding: 5px 8px;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  color: #eaf1ff;
}
.lb-table tbody tr:nth-child(odd) { background: rgba(255,255,255,0.02); }
.lb-rank { width: 40px; color: #9fb4e0; text-align: right; }
.lb-num  { text-align: right; font-variant-numeric: tabular-nums; }
.lb-status { padding: 12px 4px; text-align: center; color: #9fb4e0; font-size: 13px; }
.lb-status.error { color: #ffd0d8; }

/* --- Game-over leaderboard upload --- */
.lb-upload {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  margin: 6px 0 4px;
}
.lb-upload-msg { margin: 0; font-size: 14px; color: #cdd9f2; text-align: center; }
.lb-upload-msg.error { color: #ffd0d8; }

.stat {
  background: var(--panel);
  border: 1px solid var(--panel-line);
  border-radius: 12px;
  padding: 10px 18px;
  backdrop-filter: blur(6px);
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.stat-label { font-size: 11px; letter-spacing: 2px; color: #8fa6d6; }
.stat-value { font-size: 26px; font-weight: 800; color: #fff; }
#timer-value { font-variant-numeric: tabular-nums; letter-spacing: 1px; }
/* Reserve room for up to "9,999,999,999" so the panel never resizes */
#score-value { font-variant-numeric: tabular-nums; display: inline-block; min-width: 205px; }
.fps-stat { opacity: 0.45; flex: 0 0 auto; }
.fps-stat.hidden { display: none; }
.hp-stat { flex: 1; }
.hp-track {
  position: relative;
  height: 16px;
  background: rgba(255,255,255,0.08);
  border-radius: 8px;
  overflow: hidden;
  margin-top: 2px;
}
#hp-fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--good), #63d0ff);
  transition: width 0.2s ease, background 0.3s;
}
.hp-num { font-size: 13px; color: #cfe0ff; align-self: flex-end; }

#wave-banner {
  align-self: center;
  font-size: 64px;
  font-weight: 900;
  letter-spacing: 4px;
  color: #fff;
  text-shadow: 0 0 30px var(--accent);
  opacity: 0;
  margin-top: -80px;
}
#wave-banner.show { animation: banner 1.8s ease-out; }

/* Placement mode */
#viewport.placing { cursor: crosshair; }
#place-hint {
  position: absolute;
  top: 120px; left: 50%;
  transform: translateX(-50%);
  background: rgba(18,26,48,0.9);
  border: 1px solid rgba(120,200,255,0.45);
  color: #e5f3ff;
  padding: 11px 22px;
  border-radius: 12px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 1px;
  z-index: 160;
  opacity: 0;
  pointer-events: none;
  box-shadow: 0 0 34px rgba(56,225,255,0.35);
  transition: opacity 0.2s;
}
#place-hint.show { opacity: 1; animation: hintBob 1.4s ease-in-out infinite; }

/* ---------- Shop ---------- */
#shop {
  pointer-events: auto;
  margin: 0 16px 16px;
  background: var(--panel);
  border: 1px solid var(--panel-line);
  border-radius: 0 0 14px 14px;   /* square top — the wave-status bar sits above it */
  backdrop-filter: blur(8px);
  padding: 12px 14px 14px;
  transition: transform 0.35s ease, opacity 0.35s ease;
}
/* Accordion the menus away while placing satellites so the field is clear.
   The deploy button lives outside #hud-top-left, so it stays visible. */
#hud-top-left { transition: transform 0.35s ease, opacity 0.35s ease; }
#wave-status  { transition: transform 0.35s ease, opacity 0.35s ease; }
#viewport.placing #hud-top-left  { transform: translateY(-140%); opacity: 0; }
#viewport.placing #shop          { transform: translateY(160%);  opacity: 0; }
#viewport.placing #wave-status   { transform: translateY(300%);  opacity: 0; }
/* Fully disable interaction on the collapsed menus AND all their children
   (buttons set pointer-events:auto, which would otherwise still catch clicks),
   so placement taps pass through to the field even over their old positions. */
#viewport.placing #hud-top-left,
#viewport.placing #hud-top-left *,
#viewport.placing #shop-dock,
#viewport.placing #shop-dock * {
  pointer-events: none;
}

/* Deploy-satellite button (top bar, right of Tower Integrity) */
#sat-spawn-btn, #mine-btn {
  flex: 0 0 auto;
  pointer-events: auto;
  touch-action: manipulation;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 14px 4px 6px;
  background: var(--panel);
  border: 1px solid var(--panel-line);
  border-radius: 12px;
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: transform 0.1s, border-color 0.15s, box-shadow 0.15s, opacity 0.2s;
}
#sat-spawn-btn:hover, #mine-btn:hover { transform: translateY(-2px); border-color: var(--accent); box-shadow: 0 0 24px rgba(56,225,255,0.35); }
#sat-spawn-btn.armed { border-color: var(--good); box-shadow: 0 0 26px rgba(92,255,171,0.5); }
#mine-btn.armed { border-color: #ff5a2a; box-shadow: 0 0 26px rgba(255,90,42,0.55); }
#sat-spawn-btn.disabled, #mine-btn.disabled { opacity: 0.45; }
#sat-spawn-btn *, #mine-btn * { pointer-events: none; }
.sat-spawn-icon { width: 50px; height: 50px; flex: 0 0 auto; }
.sat-spawn-icon svg { width: 100%; height: 100%; display: block; filter: drop-shadow(0 0 8px rgba(120,200,255,0.5)); }
#mine-icon svg { filter: drop-shadow(0 0 8px rgba(255,90,42,0.6)); }
.sat-spawn-info { display: flex; flex-direction: column; align-items: flex-start; line-height: 1.15; }
.sat-spawn-info .ss-count { font-weight: 800; font-size: 16px; color: #eaf1ff; }
.sat-spawn-info .ss-cost { font-size: 12px; font-weight: 700; color: var(--good); letter-spacing: 1px; }
#shop-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  letter-spacing: 2px;
  color: #9fb4e0;
  margin-bottom: 10px;
}
#shop-points { color: var(--good); font-weight: 800; font-size: 18px; }
#wave-bonus {
  flex: 1;
  text-align: center;
  color: #ffd36b;
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
#wave-bonus.flash { animation: waveBonusPop 0.6s ease-out; }
@keyframes waveBonusPop {
  0%   { transform: scale(1);    text-shadow: none; }
  35%  { transform: scale(1.25); text-shadow: 0 0 12px rgba(255,211,107,0.9); }
  100% { transform: scale(1);    text-shadow: none; }
}
/* Player / Satellites tabs */
#shop-tabs { display: flex; gap: 6px; }
.shop-tab {
  pointer-events: auto;
  touch-action: manipulation;
  font-family: inherit;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 1px;
  color: #9fb4e0;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--panel-line);
  border-radius: 8px;
  padding: 6px 14px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.shop-tab:hover { color: #eaf1ff; }
.shop-tab.active {
  color: #04121a;
  background: linear-gradient(180deg, #8ff2ff, var(--accent));
  border-color: var(--accent);
}
#shop-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
}
.up-btn {
  pointer-events: auto;
  touch-action: manipulation;   /* no 300ms tap delay / double-tap zoom */
  text-align: left;
  border: 1px solid var(--panel-line);
  background: linear-gradient(180deg, rgba(40,56,96,0.7), rgba(20,28,52,0.7));
  color: #eaf1ff;
  border-radius: 10px;
  padding: 10px 12px;
  cursor: pointer;
  transition: transform 0.08s, border-color 0.15s, box-shadow 0.15s;
  font-family: inherit;
}
/* Clicks/taps anywhere inside the panel resolve to the button itself */
.up-btn * { pointer-events: none; }
.up-btn:hover:not(:disabled) { transform: translateY(-2px); border-color: var(--accent); box-shadow: 0 0 18px rgba(56,225,255,0.25); }
.up-btn:active:not(:disabled) { transform: translateY(0); }
.up-btn:disabled { opacity: 0.45; cursor: not-allowed; }
.up-btn.affordable { border-color: rgba(92,255,171,0.5); }
.up-name { display: flex; justify-content: space-between; font-weight: 800; font-size: 14px; }
.up-lvl { color: var(--accent); font-size: 12px; }
.up-desc { font-size: 11px; color: #9fb0d6; margin: 4px 0 6px; }
.up-cost { font-size: 13px; font-weight: 800; }
.up-cost.ok { color: var(--good); }
.up-cost.no { color: var(--danger); }
.up-flash { animation: buyflash 0.4s; }

/* Thin wave-progress bar attached to the top of the upgrade panel */
#wave-status {
  pointer-events: auto;
  position: relative;
  margin: 0 16px 0;
  height: 22px;
  overflow: hidden;
  background: rgba(0,0,0,0.4);
  border: 1px solid var(--panel-line);
  border-bottom: none;                 /* attach flush to the shop */
  border-radius: 12px 12px 0 0;
  backdrop-filter: blur(8px);
}
#ws-fill {
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 100%;
  background: linear-gradient(90deg, #ff6b6b, #ffb347);
  box-shadow: 0 0 12px rgba(255,120,80,0.5);
  transition: width 0.25s ease;
}
#ws-label {
  position: relative;
  z-index: 1;
  display: block;
  text-align: center;
  line-height: 22px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 1px;
  color: #fff;
  text-shadow: 0 1px 3px rgba(0,0,0,0.7);
}

/* ---------- Overlays ---------- */
.overlay {
  position: absolute;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 40%, rgba(10,16,34,0.85), rgba(3,4,10,0.96));
  backdrop-filter: blur(4px);
  pointer-events: auto;
}
.overlay.hidden { display: none; }
.overlay-card {
  text-align: center;
  max-width: 800px;
  padding: 40px 44px;
  background: var(--panel);
  border: 1px solid var(--panel-line);
  border-radius: 20px;
  box-shadow: 0 30px 80px rgba(0,0,0,0.6);
}
.title { font-size: 68px; margin: 0; letter-spacing: 4px; font-weight: 900; }
.title span { color: var(--accent); text-shadow: 0 0 30px var(--accent); }
.subtitle { color: #9fb4e0; font-size: 18px; margin: 6px 0 20px; }
.rules { text-align: left; color: #c4d3f2; line-height: 1.7; margin: 0 auto 24px; max-width: 380px; }
.rules b { color: var(--good); }
.login-row {
  display: flex;
  gap: 8px;
  max-width: 380px;
  margin: 0 auto 8px;
}
.email-input {
  flex: 1;
  font-family: inherit;
  font-size: 16px;
  color: #eaf1ff;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--panel-line);
  border-radius: 10px;
  padding: 12px 14px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.email-input::placeholder { color: #7c8cb5; }
.email-input:focus { border-color: var(--accent); box-shadow: 0 0 16px rgba(56,225,255,0.25); }
.login-btn {
  font-family: inherit;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 1px;
  color: #04121a;
  background: linear-gradient(180deg, #cbb6ff, var(--accent-2));
  border: none;
  border-radius: 10px;
  padding: 0 20px;
  cursor: pointer;
  transition: transform 0.1s, box-shadow 0.15s;
}
.login-btn:hover { transform: translateY(-2px); box-shadow: 0 0 24px rgba(123,92,255,0.5); }
.login-msg {
  min-height: 18px;
  font-size: 13px;
  color: var(--good);
  margin-bottom: 18px;
}
.login-msg.error { color: var(--danger); }

.big-btn {
  font-family: inherit;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 2px;
  color: #04121a;
  background: linear-gradient(180deg, #8ff2ff, var(--accent));
  border: none;
  border-radius: 12px;
  padding: 16px 40px;
  cursor: pointer;
  box-shadow: 0 0 40px rgba(56,225,255,0.4);
  transition: transform 0.1s, box-shadow 0.15s;
}
.big-btn:hover { transform: translateY(-2px); box-shadow: 0 0 60px rgba(56,225,255,0.6); }
.big-btn.win { background: linear-gradient(180deg, #b6ffd8, var(--good)); box-shadow: 0 0 40px rgba(92,255,171,0.5); }
.big-btn.lose { background: linear-gradient(180deg, #ff9db1, var(--danger)); box-shadow: 0 0 40px rgba(255,77,109,0.5); color: #1a0308; }
.end-stat { color: #cfe0ff; font-size: 18px; margin: 4px 0; }

/* ---------- Keyframes (HUD only — game-world animation is canvas) ---------- */
@keyframes banner { 0% { opacity: 0; transform: scale(0.6); } 20% { opacity: 1; transform: scale(1); } 80% { opacity: 1; } 100% { opacity: 0; transform: scale(1.1); } }
@keyframes buyflash { 0% { background: rgba(92,255,171,0.6); } 100% { background: transparent; } }
@keyframes pausePulse { 0%,100% { opacity: 0.55; } 50% { opacity: 1; } }
@keyframes hintBob { 0%,100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(-5px); } }