/* ============================================================================
 * HUD CSS — styly pro in-game overlay (Člen 1)
 * ----------------------------------------------------------------------------
 * Styly pro všechny HUD elementy vytvářené v src/ui/hud.js:
 *
 *   - #hud-root      — kontejner, pointer-events: none (neblokuje vstupy)
 *   - #hud-hp        — HP bar + číslo (vlevo dole)
 *   - #hud-wave-score — vlna + skóre + multiplier + perky (vlevo nahoře)
 *   - #hud-boss      — boss HP bar + phase marks (nahoře uprostřed)
 *   - #hud-weapons   — top-down weapon sloty (vpravo dole)
 *   - #hud-ammo-fps  — FPS ammo counter (uprostřed dole)
 *   - #hud-reload    — reload progress bar
 *   - #hud-objective — aktuální Campaign cíl (vpravo nahoře)
 *   - #hud-dmg-dir   — šipka odkud útok přišel (animovaná)
 *   - #hud-pickup-feedback — toast notifikace pro pickup
 *   - #hud-low-hp-vignette — červený rámeček při kritickém HP
 *
 * Camera-aware styling:
 *   .mode-fps a .mode-topdown class na #hud-root přepíná, které prvky jsou
 *   visible — některé sloty mají smysl jen v jednom módu.
 *
 * Barvy + theme:
 *   - cyan #00e5ff       — primary accent (HP full, score, počítadla)
 *   - red #ff2244 / #ff5555 — damage, low HP, boss
 *   - amber #ffd600 / #f7d046 — ammo, warning
 *   - green #39ff14      — safe zone, pickup feedback
 *
 * Pozn.: Soubor je dlouhý (~430 řádků) — strukturován do sekcí oddělených
 * komentáři /* ── X ── *\/. Pro úpravy stačí najít sekci podle ID elementu.
 * ========================================================================== */

/* ── HUD root ── */
#hud-root {
  position: fixed; inset: 0;
  pointer-events: none; z-index: 50;
  font-family: monospace;
}

/* ── HP ── */
#hud-hp {
  position: fixed; left: 16px; bottom: 24px;
  display: flex; align-items: center; gap: 8px;
}
#hud-hp-icon {
  font-size: 22px; line-height: 1; color: #ff2244;
  animation: hud-heart-beat 1.4s ease-in-out infinite;
  display: inline-block;
}
@keyframes hud-heart-beat {
  0%   { transform: scale(1); }
  12%  { transform: scale(1.28); }
  24%  { transform: scale(1); }
  36%  { transform: scale(1.16); }
  55%  { transform: scale(1); }
  100% { transform: scale(1); }
}
#hud-hp-bar-wrap {
  width: 210px; height: 10px;
  background: rgba(255,255,255,0.1);
  border-radius: 5px; overflow: hidden;
}
#hud-hp-bar {
  height: 100%; width: 100%;
  border-radius: 5px;
  background: #39ff14;
  transition: width 0.2s, background 0.4s;
}
#hud-hp-bar.hp-med { background: #e5a800; }
#hud-hp-bar.hp-low {
  background: #ff1744;
  animation: hud-hp-pulse 0.8s ease-in-out infinite;
}
@keyframes hud-hp-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.45; }
}
#hud-hp-num {
  color: #cde; font-size: 16px; font-weight: 700;
  letter-spacing: 1px; min-width: 32px;
}

/* ── Wave / Score ── */
#hud-wave-score {
  position: fixed; top: 16px; left: 16px;
  display: flex; flex-direction: column; gap: 4px; align-items: flex-start;
}
#hud-wave {
  color: #5a7a8a; font-size: 15px; letter-spacing: 2px;
  text-transform: uppercase;
}
#hud-score-wrap { display: flex; align-items: center; gap: 10px; }
#hud-score { color: #fff; font-size: 17px; font-weight: 700; letter-spacing: 2px; }
#hud-multiplier {
  color: #39ff14; font-size: 13px; letter-spacing: 1px;
  background: rgba(57,255,20,0.1);
  border: 1px solid rgba(57,255,20,0.25);
  border-radius: 4px; padding: 3px 8px;
}
#hud-perks {
  display: flex; flex-wrap: wrap; gap: 5px;
  max-width: 240px; margin-top: 4px;
}
.hud-perk {
  min-width: 22px; height: 22px;
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0 6px;
  border-radius: 5px;
  border: 1px solid rgba(0,229,255,0.35);
  background: rgba(0,14,18,0.72);
  color: #9cefff;
  font-size: 11px; font-weight: 800;
  letter-spacing: 1px;
  text-shadow: 0 0 8px rgba(0,229,255,0.45);
}

/* ── Boss HP bar (full-width, top) ── */
#hud-boss {
  position: fixed; top: 12px; left: 50%;
  transform: translateX(-50%);
  width: min(620px, 46vw);
  padding: 0;
  background: transparent;
  border-bottom: 0;
  display: flex; flex-direction: column; align-items: center; gap: 6px;
}
#hud-boss-name {
  color: #ff1744; font-size: 11px; letter-spacing: 4px;
  text-transform: uppercase;
}
#hud-boss-bar-wrap {
  width: 100%; height: 6px;
  background: rgba(255,255,255,0.1);
  border-radius: 3px; overflow: hidden;
}
#hud-boss-bar {
  height: 100%; width: 100%;
  background: #ff1744;
  border-radius: 3px;
  transition: width 0.3s;
}

/* Boss phase markers */
.boss-phase-mark {
  position: absolute; top: 0; bottom: 0; width: 2px;
  background: rgba(255,255,255,0.5);
  pointer-events: none;
}
#hud-boss-bar-wrap { position: relative; }
#hud-boss-bar.boss-bar-weak {
  background: #ffcc00;
  box-shadow: 0 0 12px rgba(255,204,0,0.6);
}
#hud-boss-status {
  color: #ff6644; font-size: 10px; letter-spacing: 3px;
  text-transform: uppercase; min-height: 14px;
  text-align: center;
}
#hud-boss-status.boss-status-flash {
  animation: boss-stat-flash 0.4s ease-out;
}
@keyframes boss-stat-flash {
  0% { color: #ffffff; transform: scale(1.3); }
  100% { color: #ff6644; transform: scale(1); }
}
#hud-boss.boss-phase-flash {
  animation: boss-phase-flash 0.6s ease-out;
}
@keyframes boss-phase-flash {
  0% { border-bottom-color: #ffffff; background: rgba(255,50,50,0.3); }
  100% { border-bottom-color: rgba(255,23,68,0.3); background: rgba(0,0,0,0.6); }
}

/* ── Weapon slots (TOP_DOWN) ── */
#hud-weapons {
  position: fixed; bottom: 16px; right: 16px;
  display: flex; gap: 8px; align-items: flex-end;
}
.hud-wslot {
  display: flex; flex-direction: column; align-items: center;
  padding: 8px 14px;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  background: rgba(0,0,0,0.55);
  min-width: 84px;
  opacity: 0.4;
  transition: opacity 0.2s, border-color 0.2s, background 0.2s;
}
.hud-wslot.active {
  opacity: 1;
  border-color: #39ff14;
  background: rgba(57,255,20,0.08);
}
.hud-wslot.locked { opacity: 0.15; }
.hud-wslot-key {
  font-size: 10px; color: #888; letter-spacing: 1px; margin-bottom: 3px;
}
.hud-wslot.active .hud-wslot-key { color: #39ff14; }
.weapon-glyph {
  display: inline-block;
  width: 34px; height: 24px;
  background: currentColor;
  -webkit-mask: var(--weapon-icon) center / contain no-repeat;
  mask: var(--weapon-icon) center / contain no-repeat;
}
.weapon-glyph-pistol { --weapon-icon: url('../../assets/icons/pistol.svg'); }
.weapon-glyph-ak47   { --weapon-icon: url('../../assets/icons/ak47.svg'); }
.hud-wslot-icon {
  color: #c7d7df;
  margin-bottom: 4px;
  filter: drop-shadow(0 0 8px rgba(0,229,255,0.22));
}
.hud-wslot.active .hud-wslot-icon {
  color: #39ff14;
  filter: drop-shadow(0 0 10px rgba(57,255,20,0.45));
}
.hud-wslot.locked .hud-wslot-icon {
  color: #64707a;
  filter: none;
}
.hud-wslot-name {
  font-size: 12px; color: #ccc; letter-spacing: 1px;
  text-transform: uppercase;
}
.hud-wslot.active .hud-wslot-name { color: #39ff14; }
.hud-wslot-ammo { font-size: 11px; color: #00e5ff; margin-top: 3px; }
.hud-wslot.low-ammo {
  border-color: #ffcc44;
  background: rgba(255,204,68,0.08);
}
.hud-wslot.low-ammo .hud-wslot-ammo,
.hud-wslot.low-ammo .hud-wslot-name {
  color: #ffcc44;
}

/* ── FPS ammo (large, bottom-right) ── */
#hud-ammo-fps {
  position: fixed; bottom: 24px; right: 24px;
  text-align: right; display: none;
}
#hud-ammo-fps-num {
  color: #fff; font-size: 38px; font-weight: 700;
  letter-spacing: 2px; line-height: 1;
}
#hud-ammo-fps-weapon {
  color: #00e5ff; font-size: 11px; letter-spacing: 3px;
  text-transform: uppercase; margin-top: 4px;
}
#hud-ammo-fps.low-ammo #hud-ammo-fps-num {
  color: #ffcc44;
  text-shadow: 0 0 18px rgba(255,204,68,0.35);
}
#hud-ammo-fps.reload-needed #hud-ammo-fps-weapon {
  color: #ff4455;
}
#hud-ammo-fps.reload-needed #hud-ammo-fps-weapon::after {
  content: "  " attr(data-reload-label);
  color: #ffcc44;
}

/* ── Reload bar (center-bottom) ── */
#hud-reload {
  position: fixed; bottom: 80px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 4px;
}
#hud-reload-bar-wrap {
  width: 120px; height: 3px;
  background: rgba(255,255,255,0.15);
  border-radius: 2px; overflow: hidden;
}
#hud-reload-bar {
  height: 100%; width: 0%;
  background: #00e5ff;
  border-radius: 2px;
}
#hud-reload-label {
  color: #5a7a8a; font-size: 10px; letter-spacing: 3px;
  text-transform: uppercase;
}

/* ── FPS layout overrides ── */
#hud-root.mode-fps #hud-hp-bar-wrap { width: 120px; }
#hud-root.mode-fps #hud-wave  { font-size: 13px; }
#hud-root.mode-fps #hud-score { font-size: 14px; }

/* FPS: weapon slots vertically stacked above ammo counter */
#hud-root.mode-fps #hud-weapons {
  flex-direction: column; align-items: flex-end;
  gap: 5px; bottom: 112px; right: 24px;
}
#hud-root.mode-fps .hud-wslot {
  flex-direction: row; align-items: center;
  gap: 8px; min-width: unset;
  padding: 5px 10px; border-radius: 5px;
  background: rgba(0,0,0,0.3);
  border-color: rgba(255,255,255,0.07);
}
#hud-root.mode-fps .hud-wslot.active {
  border-color: rgba(57,255,20,0.5);
  background: rgba(57,255,20,0.06);
}
#hud-root.mode-fps .hud-wslot-key  { display: none; }
#hud-root.mode-fps .hud-wslot-icon { width: 28px; height: 18px; margin-bottom: 0; }
#hud-root.mode-fps .hud-wslot-name { font-size: 11px; }
#hud-root.mode-fps .hud-wslot-ammo { margin-top: 0; font-size: 11px; }
#hud-root.mode-fps #hud-ammo-fps   { display: block; }
#hud-root.mode-fps #hud-reload     { bottom: 120px; }

/* ── Objective HUD ── */
#hud-objective {
  position: fixed; bottom: 48px; left: 50%; transform: translateX(-50%);
  display: flex; align-items: center; gap: 8px;
  background: rgba(0,0,0,0.55);
  border: 1px solid rgba(57,255,20,0.3);
  border-radius: 6px;
  padding: 8px 18px;
  white-space: nowrap;
  transition: opacity 0.3s, transform 0.3s;
}
#hud-objective-icon {
  color: #39ff14; font-size: 10px;
  animation: obj-pulse 2s ease-in-out infinite;
}
#hud-objective-text {
  color: #d9f7ff; font-size: 13px; letter-spacing: 2px;
  text-transform: uppercase;
}
#hud-objective.obj-appear {
  animation: obj-slide-in 0.5s ease-out;
}
#hud-objective.obj-complete {
  border-color: rgba(57,255,20,0.7);
}
#hud-objective.obj-complete #hud-objective-text {
  color: #39ff14;
}
#hud-objective.obj-complete #hud-objective-icon::after {
  content: ' ✓';
}
@keyframes obj-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
@keyframes obj-slide-in {
  from { opacity: 0; transform: translateX(-50%) translateY(20px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}
/* FPS mode: move above reload bar */
#hud-root.mode-fps #hud-objective { bottom: 150px; }

/* ── Tutorial hints ── */
#tutorial-hint {
  position: fixed; top: 22%; left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,0.7);
  border: 1px solid rgba(0,229,255,0.4);
  border-radius: 6px;
  padding: 10px 24px;
  font-family: monospace; font-size: 14px;
  color: #d0f0ff; letter-spacing: 2px;
  text-transform: uppercase;
  pointer-events: none; z-index: 80;
  transition: opacity 0.3s;
}
#tutorial-hint.hint-appear {
  animation: hint-slide 0.4s ease-out;
}
@keyframes hint-slide {
  from { opacity: 0; transform: translateX(-50%) translateY(-10px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ── Damage direction indicator ── */
#hud-dmg-dir {
  position: fixed; top: 50%; left: 50%;
  width: 80px; height: 80px;
  transform: translate(-50%, -50%) rotate(var(--dmg-angle, 0deg));
  pointer-events: none; z-index: 60;
}
#hud-dmg-dir.dmg-flash::before {
  content: '';
  position: absolute; top: -30px; left: 50%;
  transform: translateX(-50%);
  width: 4px; height: 22px;
  background: #ff2244;
  border-radius: 2px;
  box-shadow: 0 0 12px #ff2244;
  animation: dmg-dir-fade 0.4s ease-out forwards;
}
@keyframes dmg-dir-fade {
  from { opacity: 1; }
  to   { opacity: 0; }
}

/* ── Low HP vignette ── */
#hud-low-hp-vignette {
  position: fixed; inset: 0;
  pointer-events: none; z-index: 45;
  background: radial-gradient(ellipse at center, transparent 55%, rgba(180,0,0,0.4) 100%);
  animation: hp-vig-pulse 1.2s ease-in-out infinite;
}
@keyframes hp-vig-pulse {
  0%, 100% { opacity: var(--vig-opacity, 0.3); }
  50%      { opacity: calc(var(--vig-opacity, 0.3) * 0.5); }
}

/* ── Pickup feedback ── */
#hud-pickup-feedback {
  position: fixed; bottom: 30%; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center;
  pointer-events: none; z-index: 55;
}
.pickup-text {
  color: #39ff14; font-size: 16px; font-weight: 700;
  font-family: monospace; letter-spacing: 2px;
  text-shadow: 0 0 8px rgba(57,255,20,0.5);
  animation: pickup-rise 1.2s ease-out forwards;
}
@keyframes pickup-rise {
  from { opacity: 1; transform: translateY(0); }
  to   { opacity: 0; transform: translateY(-40px); }
}

/* ── Crosshair (FPS mode) ── */
#crosshair {
  position: fixed; top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 20px; height: 20px;
  pointer-events: none; z-index: 200;
}
#crosshair { --ch-color: #00e5ff; }
#crosshair::before, #crosshair::after {
  content: ''; position: absolute;
  background: var(--ch-color, rgba(255,255,255,0.8));
}
#crosshair::before { width: 2px; height: 100%; left: 50%; transform: translateX(-50%); }
#crosshair::after  { height: 2px; width: 100%; top: 50%;  transform: translateY(-50%); }

/* ── Damage numbers ── */
.damage-number {
  position: fixed;
  transform: translate(-50%, -50%) scale(0.92);
  pointer-events: none;
  z-index: 920;
  opacity: 1;
  transition: transform 0.48s ease-out, opacity 0.48s ease-out;
  font-family: monospace;
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 1px;
  color: #d9f7ff;
  text-shadow: 0 0 8px rgba(0,229,255,0.55), 0 1px 2px #000;
}
.damage-number-boss {
  color: #ff7a66;
  font-size: 16px;
  text-shadow: 0 0 10px rgba(255,70,40,0.65), 0 1px 2px #000;
}
.damage-number-weak {
  color: #ffe45c;
  font-size: 18px;
  text-shadow: 0 0 12px rgba(255,228,92,0.75), 0 1px 2px #000;
}