/* ============================================================
   ZOMBIE SURVIVAL — THE LAST CITY
   Tema UI: dark survival / post-apocalyptic
   ============================================================ */

:root {
  --color-bg: #0d0f0e;
  --color-panel: rgba(12, 14, 13, 0.82);
  --color-border: #3a3f36;
  --color-text: #d8d4c6;
  --color-muted: #8a8778;
  --color-accent: #c8a24a;   /* kuning karat */
  --color-danger: #a8322a;
  --color-stamina: #d9c24a;
  --font-main: "Segoe UI", Roboto, Arial, sans-serif;
  --font-title: Impact, "Arial Black", sans-serif;
}

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

html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-main);
  user-select: none;
}

#game-container {
  position: fixed;
  inset: 0;
}

#game-container canvas {
  display: block;
}

.hidden {
  display: none !important;
}

/* ---------------- HUD ---------------- */

#hud {
  position: fixed;
  inset: 0;
  pointer-events: none;
}

#crosshair {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 6px;
  height: 6px;
  margin: -3px 0 0 -3px;
  border-radius: 50%;
  background: rgba(230, 225, 210, 0.85);
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.6);
}

#stats-panel {
  position: absolute;
  left: 20px;
  bottom: 20px;
  padding: 10px 14px;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  min-width: 220px;
}

.stat-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.stat-icon {
  width: 20px;
  text-align: center;
  font-size: 15px;
}

.stat-bar {
  flex: 1;
  height: 10px;
  background: #1f221f;
  border: 1px solid #2c302a;
  border-radius: 2px;
  overflow: hidden;
}

.stat-fill {
  height: 100%;
  width: 100%;
  transition: width 0.1s linear;
}

.stat-fill.stamina {
  background: linear-gradient(90deg, #a8912f, var(--color-stamina));
}

.stat-fill.exhausted {
  background: linear-gradient(90deg, #6b2a24, var(--color-danger));
}

#zone-label {
  position: absolute;
  top: 18px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 16px;
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-radius: 3px;
  font-size: 12px;
  letter-spacing: 3px;
  color: var(--color-accent);
}

#debug-panel {
  position: absolute;
  top: 18px;
  right: 18px;
  padding: 8px 12px;
  background: rgba(0, 0, 0, 0.7);
  font-family: Consolas, monospace;
  font-size: 12px;
  line-height: 1.5;
  white-space: pre;
  color: #9fd89f;
  border-radius: 3px;
}

/* ---------------- OVERLAY (start / pause) ---------------- */

#overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(ellipse at center, rgba(20, 22, 18, 0.75), rgba(0, 0, 0, 0.95));
  z-index: 10;
}

#overlay-box {
  text-align: center;
  padding: 40px 50px;
  max-width: 520px;
  width: calc(100% - 32px);
  background: var(--color-panel);
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-danger);
}

#overlay-box h1 {
  font-family: var(--font-title);
  font-size: 44px;
  letter-spacing: 4px;
  color: var(--color-text);
  text-shadow: 0 3px 0 #000;
}

#overlay-box h2 {
  font-family: var(--font-title);
  font-size: 20px;
  letter-spacing: 10px;
  color: var(--color-danger);
  margin-bottom: 10px;
}

#overlay-subtitle {
  color: var(--color-muted);
  font-size: 13px;
  margin-bottom: 28px;
}

#start-button {
  font-family: var(--font-title);
  font-size: 20px;
  letter-spacing: 4px;
  padding: 12px 40px;
  background: #2a2d27;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  cursor: pointer;
  transition: background 0.15s;
}

#start-button:hover:not(:disabled) {
  background: #3a3d33;
}

#start-button:disabled {
  opacity: 0.5;
  cursor: wait;
}

#controls-help {
  margin-top: 28px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 18px;
  text-align: left;
  font-size: 13px;
  color: var(--color-muted);
}

kbd {
  display: inline-block;
  min-width: 22px;
  padding: 1px 5px;
  margin-right: 3px;
  font-family: Consolas, monospace;
  font-size: 11px;
  text-align: center;
  color: var(--color-text);
  background: #1e201c;
  border: 1px solid #45493f;
  border-radius: 3px;
}

#error-message {
  white-space: pre-line;
  margin-top: 20px;
  padding: 10px;
  font-size: 13px;
  color: #ffb4a8;
  background: rgba(168, 50, 42, 0.2);
  border: 1px solid var(--color-danger);
  text-align: left;
}