/* ============================================================
   TARTARUS — Master Stylesheet
   Corporate dark industrial aesthetic
   ============================================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Core palette */
  --bg-void:        #0a0a0e;
  --bg-panel:       #111118;
  --bg-panel-hover: #1a1a24;
  --border-dim:     #222233;
  --border-bright:  #33334d;

  /* Text */
  --text-primary:   #d4d4dc;
  --text-secondary: #8888a0;
  --text-muted:     #55556a;

  /* Accent colors (from programmer art spec) */
  --cyan:           #00ffcc;
  --cyan-dim:       rgba(0, 255, 204, 0.25);
  --amber:          #ffaa00;
  --amber-dim:      rgba(255, 170, 0, 0.15);
  --red:            #ff4444;
  --red-dim:        rgba(255, 68, 68, 0.15);
  --green:          #44ff88;

  /* Health bar states */
  --health-high:    #44ff88;
  --health-mid:     #ffcc00;
  --health-low:     #ff4444;

  /* Layout */
  --top-bar-height: 72px;
  --dashboard-height: 220px;
  --max-width: 600px;

  /* Fonts */
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'Share Tech Mono', monospace;
}

html, body {
  height: 100%;
  width: 100%;
  background: var(--bg-void);
  color: var(--text-primary);
  font-family: var(--font-body);
  overflow: hidden;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

/* ============================================================
   GAME CONTAINER — Full viewport, column layout
   ============================================================ */
#game-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  max-width: var(--max-width);
  margin: 0 auto;
  position: relative;
}

/* ============================================================
   A. TOP BAR — TELEMETRY
   ============================================================ */
#top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--top-bar-height);
  padding: 8px 12px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border-dim);
  flex-shrink: 0;
  z-index: 10;
}

#top-bar__left,
#top-bar__right {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 100px;
}

#top-bar__right {
  text-align: right;
  align-items: flex-end;
}

#top-bar__center {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 0 12px;
}

.hud-value {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-primary);
}

.hud-label {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

/* --- Health Bar --- */
#health-bar-container {
  width: 100%;
  max-width: 220px;
  height: 20px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-dim);
  border-radius: 3px;
  position: relative;
  overflow: hidden;
}

#health-bar-fill {
  height: 100%;
  width: 100%;
  background: var(--health-high);
  border-radius: 2px;
  transition: width 0.3s ease, background-color 0.5s ease;
}

#health-bar-label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--bg-void);
  font-weight: 600;
  letter-spacing: 1px;
  text-shadow: 0 0 2px rgba(0,0,0,0.5);
}

/* --- Canister Bar --- */
#canister-bar-container {
  width: 100%;
  max-width: 220px;
  height: 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-dim);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}

#canister-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--cyan);
  border-radius: 1px;
  transition: width 0.2s linear;
}

#canister-bar-label {
  position: absolute;
  top: 50%;
  right: 4px;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 7px;
  color: var(--text-muted);
  letter-spacing: 1px;
}

/* ============================================================
   B. CENTER CANVAS — ACTION ZONE
   ============================================================ */
#canvas-wrapper {
  flex: 1;
  position: relative;
  overflow: hidden;
  min-height: 0;
  background: var(--bg-void);
}

#game-canvas {
  display: block;
  width: 100%;
  height: 100%;
  background: #0f0f11;
}

/* --- Overlays --- */
.overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 20;
}

.overlay-comm {
  position: absolute;
  bottom: 12px;
  left: 12px;
  right: 12px;
  padding: 10px 14px;
  background: rgba(10, 10, 14, 0.92);
  border: 1px solid var(--border-dim);
  border-left: 3px solid var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
  letter-spacing: 0.3px;
  line-height: 1.5;
  z-index: 25;
  animation: comm-fade-in 0.3s ease;
}

@keyframes comm-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   C. BOTTOM DASHBOARD — CONTROLS
   ============================================================ */
#dashboard {
  flex-shrink: 0;
  background: var(--bg-panel);
  border-top: 1px solid var(--border-dim);
  padding: 10px 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 10;
}

/* --- Weapon Slots --- */
#weapon-slots {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.weapon-slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 10px 6px;
  background: var(--bg-void);
  border: 1px solid var(--border-dim);
  border-radius: 4px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.weapon-slot:hover {
  border-color: var(--border-bright);
  background: var(--bg-panel-hover);
}

.weapon-slot:active {
  background: rgba(0, 255, 204, 0.06);
  border-color: var(--cyan);
}

.weapon-slot.locked {
  opacity: 0.35;
  cursor: default;
  pointer-events: none;
}

.slot-name {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-primary);
}

.slot-mk {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--cyan);
  letter-spacing: 0.5px;
}

.slot-cost {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}

.slot-cost.insufficient {
  color: var(--text-muted);
  opacity: 0.5;
}

.slot-cost.maxed {
  color: var(--cyan);
  opacity: 0.7;
}

/* Upgrade purchase flash */
@keyframes slot-flash {
  0%   { border-color: var(--cyan); background: rgba(0, 255, 204, 0.12); }
  100% { border-color: var(--border-dim); background: var(--bg-void); }
}

.weapon-slot.slot-upgraded {
  animation: slot-flash 0.5s ease-out;
}

/* Insufficient scrap shake */
@keyframes slot-shake {
  0%, 100% { transform: translateX(0); }
  20%      { transform: translateX(-3px); }
  40%      { transform: translateX(3px); }
  60%      { transform: translateX(-2px); }
  80%      { transform: translateX(2px); }
}

.weapon-slot.slot-denied {
  animation: slot-shake 0.3s ease-out;
}

/* ============================================================
   MK.II FORK OVERLAY
   ============================================================ */
#fork-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(5, 5, 8, 0.88);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 100;
  gap: 16px;
  padding: 20px;
}

#fork-overlay .fork-title {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--cyan);
  text-align: center;
  margin-bottom: 4px;
}

#fork-overlay .fork-subtitle {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 8px;
}

.fork-options {
  display: flex;
  gap: 12px;
  width: 100%;
  max-width: 400px;
}

.fork-btn {
  flex: 1;
  padding: 16px 12px;
  background: var(--bg-panel);
  border: 1px solid var(--border-dim);
  border-radius: 6px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.fork-btn:hover {
  border-color: var(--cyan);
  background: var(--bg-panel-hover);
}

.fork-btn:active {
  background: rgba(0, 255, 204, 0.08);
}

.fork-btn .fork-label {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-primary);
}

.fork-btn .fork-desc {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-secondary);
  text-align: center;
  line-height: 1.4;
}

.fork-btn .fork-icon {
  font-size: 20px;
  margin-bottom: 2px;
}

/* --- Overhaul Button --- */
#overhaul-row {
  display: flex;
  justify-content: center;
}

.dashboard-btn {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 1.5px;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid var(--border-dim);
  border-radius: 3px;
  padding: 6px 20px;
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}

.dashboard-btn:hover {
  color: var(--cyan);
  border-color: var(--cyan);
}

/* --- Ultimate Button --- */
#ultimate-row {
  display: flex;
  justify-content: center;
}

.ultimate-btn {
  width: 140px;
  height: 44px;
  border-radius: 22px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 1.5px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.ultimate-btn.locked {
  opacity: 0.3;
  border-color: var(--text-muted);
  color: var(--text-muted);
  cursor: default;
  pointer-events: none;
}

.ultimate-btn:not(.locked) {
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 0 0 12px var(--cyan-dim);
}

.ultimate-btn:not(.locked):hover {
  background: var(--cyan-dim);
}

/* ============================================================
   UTILITY CLASSES
   ============================================================ */
.hidden {
  display: none !important;
}

/* Scrap counter highlight animation */
@keyframes scrap-pulse {
  0%   { color: var(--cyan); text-shadow: 0 0 8px var(--cyan-dim); }
  100% { color: var(--text-primary); text-shadow: none; }
}

.scrap-highlight {
  animation: scrap-pulse 0.6s ease-out;
}

/* Zone label flash */
@keyframes zone-flash {
  0%   { color: var(--cyan); }
  100% { color: var(--text-secondary); }
}

.zone-flash {
  animation: zone-flash 1s ease-out;
}

/* ============================================================
   RESPONSIVE — keep layout workable on wider screens
   ============================================================ */
@media (min-width: 601px) {
  #game-container {
    border-left: 1px solid var(--border-dim);
    border-right: 1px solid var(--border-dim);
  }
}