* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: radial-gradient(circle at 20% 10%, #3f2f16 0%, #1c140a 45%, #090603 100%);
  color: #f6f0df;
  font-family: "Trebuchet MS", "Verdana", sans-serif;
}

#game {
  display: block;
  width: 100vw;
  height: 100vh;
  cursor: crosshair;
}

#startScreen {
  position: fixed;
  inset: 0;
  z-index: 40;
  background:
    radial-gradient(circle at 22% 18%, rgba(137, 90, 45, 0.2), transparent 36%),
    radial-gradient(circle at 88% 82%, rgba(54, 126, 88, 0.2), transparent 36%),
    linear-gradient(160deg, rgba(10, 7, 4, 0.96), rgba(26, 14, 8, 0.93));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

#startScreen h1 {
  margin: 0;
  font-size: clamp(44px, 7vw, 92px);
  letter-spacing: 2px;
  color: #ffe5af;
  text-shadow: 0 6px 28px rgba(0, 0, 0, 0.55);
}

#startSubtitle {
  margin: 8px 0 18px 0;
  opacity: 0.9;
}

#startGrid {
  width: min(980px, calc(100vw - 24px));
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.startCard {
  background: linear-gradient(150deg, rgba(12, 15, 20, 0.92), rgba(30, 34, 41, 0.86));
  border: 1px solid rgba(188, 214, 235, 0.45);
  border-radius: 12px;
  padding: 14px;
}

.startCard h2 {
  margin: 0 0 10px 0;
}

#authGateText {
  margin: 2px 0 10px;
  opacity: 0.9;
}

.modeRow {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.modeBtn {
  border: 1px solid rgba(186, 222, 250, 0.62);
  border-radius: 10px;
  background: rgba(26, 45, 63, 0.92);
  color: #dff2ff;
  font-weight: 700;
  cursor: pointer;
  padding: 12px 10px;
  transition: transform 0.12s ease, filter 0.16s ease, box-shadow 0.2s ease, opacity 0.16s ease;
}

.modeBtn:hover {
  box-shadow: 0 0 18px rgba(141, 209, 255, 0.42);
  filter: brightness(1.08);
}

.modeBtn:active {
  transform: scale(0.98);
  filter: brightness(0.82);
}

.startCard label {
  display: block;
  font-size: 13px;
  margin: 8px 0 4px 0;
}

.startCard input {
  width: 100%;
  border: 1px solid rgba(190, 212, 230, 0.45);
  border-radius: 8px;
  padding: 9px 10px;
  color: #f4f8ff;
  background: rgba(17, 23, 31, 0.85);
}

.btnRow {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}

.btnRow button {
  border: 1px solid rgba(186, 222, 250, 0.62);
  border-radius: 8px;
  background: rgba(26, 45, 63, 0.92);
  color: #dff2ff;
  font-weight: 700;
  cursor: pointer;
  padding: 8px 12px;
  transition: transform 0.12s ease, filter 0.16s ease, box-shadow 0.2s ease, opacity 0.16s ease;
}

.btnRow button:hover {
  box-shadow: 0 0 14px rgba(141, 209, 255, 0.38);
  filter: brightness(1.07);
}

.btnRow button:active {
  transform: scale(0.98);
  filter: brightness(0.82);
}

.btnRow button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

#loginForm.panelFlash,
#authGate.panelFlash,
#signupCard.panelFlash {
  animation: panelIn 0.2s ease-out;
}

button.pulseActive {
  box-shadow: 0 0 16px rgba(255, 221, 137, 0.55);
}

@keyframes panelIn {
  from {
    opacity: 0.55;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

#authStatus {
  margin-top: 8px;
  min-height: 20px;
  font-size: 13px;
  opacity: 0.9;
}

#authUserStatus {
  margin-top: 8px;
  min-height: 18px;
  font-size: 13px;
  color: #d1eaff;
}

#startLeaderboard {
  max-height: 248px;
  overflow: auto;
}

#startGameBtn {
  margin-top: 14px;
  font-size: 18px;
  padding: 10px 18px;
}

#signupModal {
  position: fixed;
  inset: 0;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.55);
  padding: 18px;
}

#signupModal.hidden {
  display: none;
}

#signupCard {
  width: min(420px, calc(100vw - 24px));
  background: linear-gradient(150deg, rgba(12, 15, 20, 0.96), rgba(30, 34, 41, 0.9));
  border: 1px solid rgba(188, 214, 235, 0.45);
  border-radius: 12px;
  padding: 14px;
}

#signupCard h2 {
  margin: 0 0 10px 0;
}

#signupCard label {
  display: block;
  font-size: 13px;
  margin: 8px 0 4px 0;
}

#signupCard input {
  width: 100%;
  border: 1px solid rgba(190, 212, 230, 0.45);
  border-radius: 8px;
  padding: 9px 10px;
  color: #f4f8ff;
  background: rgba(17, 23, 31, 0.85);
}

#ui {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 10;
  font-weight: 700;
  text-shadow: 1px 1px 0 #000;
  background: linear-gradient(140deg, rgba(25, 19, 12, 0.75), rgba(63, 36, 18, 0.45));
  border: 1px solid rgba(220, 187, 120, 0.45);
  border-radius: 12px;
  padding: 10px 12px;
  backdrop-filter: blur(2px);
}

#hud {
  line-height: 1.6;
}

#hpPanel {
  position: fixed;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 18;
  width: min(520px, calc(100vw - 24px));
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid rgba(246, 206, 186, 0.6);
  background: linear-gradient(155deg, rgba(36, 20, 16, 0.9), rgba(58, 22, 18, 0.8));
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.3);
}

#hpText {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.5px;
  text-align: center;
  margin-bottom: 6px;
  color: #ffe7d8;
  text-shadow: 0 2px 0 rgba(0, 0, 0, 0.45);
}

#hpBar {
  width: 100%;
  height: 18px;
  background: rgba(0, 0, 0, 0.45);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.28);
}

#hpFill {
  width: 100%;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, #c13f3f, #f26f54);
}

#skillBar {
  position: fixed;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  z-index: 19;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  width: min(860px, calc(100vw - 24px));
}

.skillSlot {
  min-width: 150px;
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid rgba(195, 218, 245, 0.5);
  background: linear-gradient(150deg, rgba(12, 15, 20, 0.9), rgba(30, 34, 41, 0.84));
  color: #dff2ff;
  font-size: 12px;
  line-height: 1.35;
}

.skillSlot .k {
  display: inline-block;
  font-weight: 800;
  border: 1px solid rgba(170, 222, 255, 0.62);
  border-radius: 6px;
  padding: 1px 6px;
  margin-right: 6px;
}

.skillSlot .cd {
  color: #ffd29f;
  font-weight: 700;
}

.skillSlot.locked {
  opacity: 0.6;
}

#levelup {
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: min(860px, calc(100vw - 40px));
  background: rgba(28, 20, 10, 0.97);
  border: 2px solid #c6a76a;
  border-radius: 12px;
  padding: 18px;
  z-index: 20;
}

#levelup h2 {
  margin-top: 0;
  margin-bottom: 14px;
}

#choices {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.choice {
  border: 1px solid #d7bc80;
  background: #2d2011;
  color: #f6f0df;
  border-radius: 10px;
  padding: 12px;
  text-align: left;
  cursor: pointer;
  min-height: 130px;
}

.choice:hover {
  background: #443016;
}

.choice h3 {
  margin: 0 0 8px 0;
}

.choice p {
  margin: 0;
  opacity: 0.9;
  line-height: 1.4;
}

#langPanel {
  position: fixed;
  right: 16px;
  top: 12px;
  z-index: 19;
  background: linear-gradient(150deg, rgba(12, 15, 20, 0.9), rgba(30, 34, 41, 0.84));
  border: 1px solid rgba(143, 193, 233, 0.5);
  border-radius: 12px;
  padding: 8px;
  backdrop-filter: blur(3px);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
}

#langToggle {
  border: 1px solid rgba(170, 222, 255, 0.7);
  border-radius: 8px;
  background: rgba(20, 34, 48, 0.85);
  color: #d5efff;
  font-weight: 700;
  cursor: pointer;
  padding: 5px 10px;
}

#langToggle:hover {
  background: rgba(38, 58, 78, 0.95);
}

#leaderboardPanel {
  position: fixed;
  right: 16px;
  top: 68px;
  z-index: 19;
  width: min(320px, calc(100vw - 24px));
  background: linear-gradient(150deg, rgba(12, 15, 20, 0.9), rgba(30, 34, 41, 0.84));
  border: 1px solid rgba(143, 193, 233, 0.5);
  border-radius: 12px;
  padding: 10px;
  backdrop-filter: blur(3px);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.35);
}

#leaderboardTitle {
  margin: 0 0 6px 0;
  color: #d7f2ff;
  font-size: 16px;
}

#userIdText {
  font-size: 12px;
  opacity: 0.85;
  margin-bottom: 8px;
}

.leaderboard-row {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 4px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 13px;
}

.tabRow {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.tabBtn {
  border: 1px solid rgba(170, 222, 255, 0.5);
  border-radius: 8px;
  background: rgba(20, 34, 48, 0.68);
  color: #d5efff;
  cursor: pointer;
  padding: 4px 10px;
  font-size: 12px;
}

.tabBtn.active {
  background: rgba(53, 93, 124, 0.95);
}

.hidden {
  display: none !important;
}

@media (max-width: 880px) {
  #choices {
    grid-template-columns: 1fr;
  }
  #startGrid {
    grid-template-columns: 1fr;
  }
}