/* HIGHRISE PROTOCOL — HUD & screens */
:root {
  --accent: #ff5a2c;
  --accent-2: #ffce7a;
  --ok: #7dffb0;
  --danger: #ff3b3b;
  --panel: rgba(10, 12, 16, 0.55);
  --line: rgba(255, 255, 255, 0.14);
  --font: "Rajdhani", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0; width: 100%; height: 100%;
  background: #0a0c10; color: #eef2f6;
  font-family: var(--font);
  overflow: hidden;
  user-select: none;
  -webkit-font-smoothing: antialiased;
}
#app { position: fixed; inset: 0; }
#canvas-host, #canvas-host canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }

.hidden { display: none !important; }

/* ---------------- HUD ---------------- */
#hud { position: absolute; inset: 0; pointer-events: none; z-index: 10; }
.hud-block { position: absolute; }

#hud-ammo { right: 34px; bottom: 30px; text-align: right; }
.ammo-mag {
  font-size: 66px; font-weight: 800; line-height: 0.9; letter-spacing: -2px;
  color: #fff; text-shadow: 0 2px 10px rgba(0,0,0,0.6);
  transform-origin: bottom right;
}
.ammo-mag.punch { animation: ammoPunch 90ms ease-out; }
@keyframes ammoPunch { 0% { transform: scale(1.18); } 100% { transform: scale(1); } }
.ammo-reserve { font-size: 30px; font-weight: 600; color: var(--accent-2); margin-top: -6px; }
.ammo-label { font-size: 13px; letter-spacing: 4px; color: rgba(255,255,255,0.5); margin-top: 4px; }

#hud-hp { left: 34px; bottom: 30px; }
#hp-bar-track {
  width: 320px; height: 14px; background: rgba(0,0,0,0.4);
  border: 1px solid var(--line); position: relative; overflow: hidden;
  clip-path: polygon(0 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
}
#hp-bar-fill {
  position: absolute; inset: 0; width: 100%;
  background: linear-gradient(90deg, #37d67a, #9dffb8);
  transition: none; /* driven per-frame by springs in JS */
}
#hp-god-badge {
  position: absolute; right: 6px; top: -1px; font-size: 9px; font-weight: 800;
  color: #0a0c10; background: var(--accent-2); padding: 1px 5px; letter-spacing: 2px;
}
.hp-num { font-size: 22px; font-weight: 700; margin-top: 6px; letter-spacing: 1px; }

#hud-wavescore { left: 50%; top: 26px; transform: translateX(-50%); text-align: center; }
.wave-label { font-size: 15px; letter-spacing: 6px; color: rgba(255,255,255,0.6); font-weight: 600; }
.wave-label span { color: var(--accent); }
.score-num { font-size: 34px; font-weight: 800; letter-spacing: 1px; text-shadow: 0 2px 8px rgba(0,0,0,0.5); }
.enemies-left { font-size: 14px; font-weight: 700; letter-spacing: 4px; color: rgba(255,255,255,0.55); margin-top: 3px; }

#combo-box { position: absolute; left: 50%; bottom: 150px; transform: translateX(-50%); text-align: center; }
#combo-count { font-size: 54px; font-weight: 900; color: var(--accent); line-height: 1; text-shadow: 0 0 18px rgba(255,90,44,0.6); transform-origin: center; }
#combo-count.pop { animation: comboPop 220ms cubic-bezier(.2,1.6,.4,1); }
@keyframes comboPop { 0% { transform: scale(1.7) rotate(-4deg); } 100% { transform: scale(1) rotate(0); } }
#combo-label { font-size: 13px; letter-spacing: 5px; color: rgba(255,255,255,0.6); }
#overdrive-track { width: 160px; height: 5px; background: rgba(255,255,255,0.12); margin: 8px auto 0; }
#overdrive-fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--accent), #ffd24a); box-shadow: 0 0 12px var(--accent); }

.killfeed { position: absolute; right: 34px; top: 90px; width: 320px; display: flex; flex-direction: column; gap: 4px; align-items: flex-end; }
.kf-item {
  background: var(--panel); border-right: 3px solid var(--accent);
  padding: 5px 12px; font-size: 14px; font-weight: 600; letter-spacing: 0.5px;
  backdrop-filter: blur(6px); transform: translateX(120%); transition: transform 240ms cubic-bezier(.2,1.4,.4,1);
  display: flex; gap: 8px; align-items: center;
}
.kf-item.show { transform: translateX(0); }
.kf-item .kf-hs { color: var(--danger); font-weight: 800; }
.kf-item .kf-pts { color: var(--accent-2); font-weight: 700; }

.multikill {
  position: absolute; left: 50%; top: 26%; transform: translateX(-50%) scale(0.4);
  font-size: 64px; font-weight: 900; letter-spacing: 4px; color: #fff;
  text-shadow: 0 0 30px var(--accent), 0 3px 0 rgba(0,0,0,0.4);
  opacity: 0; pointer-events: none;
}
.multikill.show { animation: multiSlam 900ms cubic-bezier(.2,1.5,.4,1) forwards; }
@keyframes multiSlam {
  0% { transform: translateX(-50%) scale(0.3); opacity: 0; }
  18% { transform: translateX(-50%) scale(1.15); opacity: 1; }
  30% { transform: translateX(-50%) scale(1); opacity: 1; }
  78% { transform: translateX(-50%) scale(1); opacity: 1; }
  100% { transform: translateX(-50%) scale(1.25); opacity: 0; }
}

.wave-banner {
  position: absolute; left: 50%; top: 34%; transform: translateX(-50%);
  text-align: center; pointer-events: none;
}
.wave-banner .wb-main { font-size: 80px; font-weight: 900; letter-spacing: 10px; color: #fff; text-shadow: 0 0 40px var(--accent); }
.wave-banner .wb-sub { font-size: 20px; letter-spacing: 8px; color: var(--accent-2); }
.wave-banner.show { animation: bannerSlam 1500ms cubic-bezier(.2,1.5,.4,1) forwards; }
@keyframes bannerSlam {
  0% { transform: translateX(-50%) translateY(-60px) scale(2.4); opacity: 0; }
  22% { transform: translateX(-50%) translateY(0) scale(1); opacity: 1; }
  80% { transform: translateX(-50%) translateY(0) scale(1); opacity: 1; }
  100% { transform: translateX(-50%) translateY(20px) scale(0.9); opacity: 0; }
}

.damage-direction {
  position: absolute; left: 50%; top: 50%; width: 120px; height: 120px;
  transform: translate(-50%, -50%); border-radius: 50%;
  border: 3px solid transparent; border-top-color: rgba(255,60,60,0.9);
  opacity: 0; pointer-events: none;
}
.hit-vignette { position: absolute; inset: 0; pointer-events: none; opacity: 0;
  background: radial-gradient(ellipse at center, transparent 55%, rgba(255,40,40,0.5) 100%); }
.dmg-vignette { position: absolute; inset: 0; pointer-events: none; opacity: 0;
  background: radial-gradient(ellipse at center, transparent 48%, rgba(160,0,0,0.55) 100%); }

.prompt {
  position: absolute; left: 50%; top: 60%; transform: translateX(-50%);
  font-size: 18px; letter-spacing: 3px; font-weight: 600; color: #fff;
  background: rgba(0,0,0,0.4); padding: 6px 18px; border: 1px solid var(--line);
  opacity: 0; pointer-events: none; transition: opacity 200ms ease;
}
.prompt.show { opacity: 1; }

.score-fly-layer { position: absolute; inset: 0; pointer-events: none; }
.score-fly {
  position: absolute; font-size: 20px; font-weight: 800; color: var(--accent-2);
  text-shadow: 0 1px 4px rgba(0,0,0,0.6); pointer-events: none;
}

.god-badge {
  position: absolute; left: 34px; top: 26px; font-size: 14px; font-weight: 900; letter-spacing: 3px;
  color: #0a0c10; background: var(--accent-2); padding: 4px 12px; box-shadow: 0 0 20px rgba(255,206,122,0.5);
}

/* ---------------- Start screen (U4) ---------------- */
#start-screen {
  position: absolute; inset: 0; z-index: 30; display: flex; align-items: center; justify-content: center;
  background: radial-gradient(ellipse at 50% 40%, rgba(255,110,40,0.18), transparent 60%),
              linear-gradient(180deg, rgba(8,10,14,0.85), rgba(8,10,14,0.95));
  backdrop-filter: blur(4px);
}
.start-inner { text-align: center; max-width: 720px; padding: 20px; }
.start-title {
  font-size: 84px; font-weight: 900; letter-spacing: 8px; margin: 0; line-height: 0.95;
  color: #fff; text-shadow: 0 0 50px rgba(255,90,44,0.55);
}
.start-title span { color: var(--accent); }
.start-sub { font-size: 18px; color: rgba(255,255,255,0.7); letter-spacing: 1px; margin: 14px 0 34px; }
.start-buttons { display: flex; gap: 18px; justify-content: center; margin-bottom: 26px; }
.btn {
  pointer-events: auto; cursor: pointer; touch-action: manipulation;
  font-family: var(--font); font-weight: 800; letter-spacing: 3px;
  font-size: 20px; padding: 16px 44px; border: 1px solid var(--line); background: rgba(255,255,255,0.05);
  color: #fff; transition: all 140ms ease; text-transform: uppercase;
}
.btn:hover { background: rgba(255,255,255,0.12); transform: translateY(-2px); }
.btn:active { transform: translateY(1px) scale(0.97); transition-duration: 40ms; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #0a0c10; box-shadow: 0 0 30px rgba(255,90,44,0.5); }
.btn-primary:hover { background: #ff7040; box-shadow: 0 0 44px rgba(255,90,44,0.75); }
.btn-toggle.on { background: var(--accent-2); color: #0a0c10; border-color: var(--accent-2); box-shadow: 0 0 26px rgba(255,206,122,0.5); }
.controls-card {
  background: var(--panel); border: 1px solid var(--line); padding: 18px 26px; font-size: 15px;
  color: rgba(255,255,255,0.75); line-height: 1.9; backdrop-filter: blur(8px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}
.controls-card b { color: var(--accent-2); }

/* ---------------- Pause / Death ---------------- */
#pause-screen, #death-screen {
  position: absolute; inset: 0; z-index: 25; display: flex; align-items: center; justify-content: center;
  background: rgba(6,8,12,0.7); backdrop-filter: blur(6px);
}
.pause-inner, .death-inner { text-align: center; }
.pause-inner h2 { font-size: 64px; letter-spacing: 10px; margin: 0; }
.pause-inner p { color: rgba(255,255,255,0.6); letter-spacing: 2px; }
.death-inner h2 { font-size: 72px; letter-spacing: 8px; color: var(--danger); margin: 0 0 18px; text-shadow: 0 0 30px rgba(255,59,59,0.5); }
.death-stats { font-size: 18px; color: rgba(255,255,255,0.7); margin-bottom: 26px; line-height: 2; }
.death-stats b { color: #fff; }

/* ---------------- Self-test (A4) ---------------- */
.selftest {
  position: absolute; left: 34px; top: 90px; z-index: 40; background: rgba(0,0,0,0.8);
  border: 1px solid var(--line); border-left: 3px solid var(--ok); padding: 14px 18px;
  font-family: monospace; font-size: 13px; line-height: 1.8; min-width: 260px;
}
.selftest .pass { color: var(--ok); }
.selftest .fail { color: var(--danger); }

/* ---------------- Debug overlay (P4) ---------------- */
.debug {
  position: absolute; left: 16px; top: 16px; z-index: 50; background: rgba(0,0,0,0.72);
  border: 1px solid var(--line); padding: 10px 14px; font-family: monospace; font-size: 12px;
  line-height: 1.7; color: #9fe0ff; min-width: 230px; pointer-events: none;
}
.debug b { color: #fff; }