/* ============================================================
   VEXONA FAMILY GAME HUB — Math Tower
   ============================================================ */

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

:root {
  --font: 'Outfit', system-ui, sans-serif;
  --bg-sky-top: #0a192f;
  --bg-sky-bot: #203a43;
  --panel-bg: rgba(16, 25, 45, 0.65);
  --panel-border: rgba(255, 255, 255, 0.15);
  --text-main: #e8eef8;
  --accent-cyan: #06b6d4;
  --accent-cyan-hover: #0891b2;
  
  --p1-color: #3b82f6; /* Blue */
  --p2-color: #ef4444; /* Red */
  --p3-color: #eab308; /* Gold */
}

body {
  font-family: var(--font);
  color: var(--text-main);
  background: var(--bg-sky-bot);
  overflow: hidden;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Background Layers */
.bg-layer {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}
.bg-sky {
  background: linear-gradient(180deg, var(--bg-sky-top) 0%, var(--bg-sky-bot) 100%);
}
.bg-clouds {
  background: radial-gradient(circle at 50% 120%, rgba(255,255,255,0.05) 0%, transparent 60%);
}
.bg-city {
  background: linear-gradient(180deg, transparent 80%, rgba(0,0,0,0.6) 100%);
}

/* Screens */
.screen {
  display: none;
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0; left: 0;
  flex-direction: column;
}
.screen.active {
  display: flex;
}

/* Glass Panels */
.glass-panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

/* Buttons */
.btn {
  display: inline-block;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 700;
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.btn-primary {
  background: rgba(255,255,255,0.1);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.2);
}
.btn-primary:hover {
  background: rgba(255,255,255,0.15);
}
.btn-primary.active {
  background: var(--accent-cyan);
  border-color: var(--accent-cyan);
}
.btn-start {
  background: linear-gradient(135deg, #0284c7, #06b6d4);
  color: white;
  font-size: 1.2rem;
  padding: 16px 32px;
  border-radius: 100px;
  box-shadow: 0 4px 15px rgba(6, 182, 212, 0.4);
}
.btn-start:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(6, 182, 212, 0.6);
}

.btn-back {
  color: rgba(255,255,255,0.6);
  text-decoration: none;
  font-size: 0.9rem;
  margin-top: 16px;
  transition: color 0.2s;
}
.btn-back:hover { color: white; }

/* Lobby Screen */
#lobbyScreen {
  justify-content: center;
  align-items: center;
}
.lobby-card {
  width: 90%;
  max-width: 800px;
  padding: 40px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 24px;
  align-items: center;
}
.lobby-card h1 {
  font-size: 3rem;
  font-weight: 900;
  background: linear-gradient(135deg, #ffffff, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.player-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 12px;
}
.controls-panel {
  display: flex;
  gap: 24px;
  justify-content: center;
  width: 100%;
}
.controls-col {
  flex: 1;
  background: rgba(0,0,0,0.2);
  padding: 16px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.05);
}
.player-name-input {
  width: 100%;
  background: rgba(0,0,0,0.4);
  border: 1px solid rgba(255,255,255,0.2);
  color: white;
  padding: 8px;
  border-radius: 6px;
  text-align: center;
  font-family: inherit;
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
}
#col-p1 .player-name-input { color: var(--p1-color); border-color: rgba(59,130,246,0.5); }
#col-p2 .player-name-input { color: var(--p2-color); border-color: rgba(239,68,68,0.5); }
#col-p3 .player-name-input { color: var(--p3-color); border-color: rgba(234,179,8,0.5); }

.difficulty-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 10px;
}

.key-group {
  display: flex;
  gap: 8px;
  justify-content: center;
}
.key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: rgba(255,255,255,0.1);
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: 6px;
  font-weight: 700;
  color: #fff;
  box-shadow: 0 4px 0 rgba(0,0,0,0.3);
}
.numpad-note {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  margin-top: 8px;
}

/* Game Interface */
.game-container {
  display: flex;
  width: 100%;
  height: 100%;
  padding: 20px 40px;
  gap: 30px;
  justify-content: center;
}
.player-col {
  flex: 1;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: relative;
}

/* Towers */
.tower-container {
  flex: 1;
  position: relative;
  border-left: 2px dashed rgba(255,255,255,0.1);
  border-right: 2px dashed rgba(255,255,255,0.1);
  border-bottom: 4px solid rgba(255,255,255,0.3);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  padding-bottom: 0;
  overflow: hidden;
}

.target-line {
  position: absolute;
  top: 10%; /* Where they need to reach */
  left: 0; width: 100%;
  height: 2px;
  background: rgba(255,255,255,0.5);
  border-top: 2px dashed rgba(255,255,255,0.8);
  box-shadow: 0 0 10px rgba(255,255,255,0.5);
}
.target-line::after {
  content: 'TARGET';
  position: absolute;
  right: 5px; top: -20px;
  font-size: 0.8rem;
  font-weight: 700;
  color: rgba(255,255,255,0.8);
}

.tower-base {
  width: 80%;
  height: 12px;
  background: #334155;
  border-radius: 4px 4px 0 0;
  position: absolute;
  bottom: 0;
  z-index: 2;
}

.tower-blocks {
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  width: 100%;
  height: calc(90% - 12px); /* 10% is target line, 12px is base */
  position: absolute;
  bottom: 12px;
  z-index: 1;
}

.tower-block {
  width: 60%;
  flex: 0 0 calc(100% / 20);
  border-radius: 4px;
  margin-top: 1px;
  box-sizing: border-box;
  box-shadow: inset 0 0 0 2px rgba(255,255,255,0.2), 0 2px 5px rgba(0,0,0,0.4);
  animation: dropIn 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes dropIn {
  from { transform: translateY(-50px) scale(1.1); opacity: 0; }
  to { transform: translateY(0) scale(1); opacity: 1; }
}

.block-break {
  animation: breakBlock 0.3s ease forwards;
}

@keyframes breakBlock {
  0% { transform: scale(1); opacity: 1; filter: brightness(1.5); }
  50% { transform: scale(1.1) rotate(5deg); opacity: 0.8; }
  100% { transform: scale(0.8) translateY(20px); opacity: 0; }
}

/* Coloring per player */
.player-name-display {
  text-align: center;
  font-size: 1.5rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: -10px;
  text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}
[data-player="1"] .player-name-display { color: var(--p1-color); }
[data-player="2"] .player-name-display { color: var(--p2-color); }
[data-player="3"] .player-name-display { color: var(--p3-color); }

[data-player="1"] .tower-block { background: linear-gradient(180deg, #60a5fa, #2563eb); }
[data-player="2"] .tower-block { background: linear-gradient(180deg, #f87171, #dc2626); }
[data-player="3"] .tower-block { background: linear-gradient(180deg, #facc15, #ca8a04); }

[data-player="1"] .problem-container { border-top: 4px solid var(--p1-color); }
[data-player="2"] .problem-container { border-top: 4px solid var(--p2-color); }
[data-player="3"] .problem-container { border-top: 4px solid var(--p3-color); }

/* Problem UI */
.problem-container {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  overflow: hidden;
}
.problem-container.error {
  animation: shake 0.4s ease;
}
.problem-container.error::after {
  content: '';
  position: absolute; inset: 0;
  background: rgba(255,0,0,0.2);
  pointer-events: none;
}
.problem-container.success::after {
  content: ''; position: absolute; inset: 0;
  background: rgba(0,255,0,0.15); pointer-events: none;
  animation: fadeOut 0.3s forwards;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-10px); }
  50% { transform: translateX(10px); }
  75% { transform: translateX(-5px); }
}
@keyframes fadeOut {
  to { opacity: 0; }
}

.problem-text {
  font-size: 2.2rem;
  font-weight: 900;
  text-align: center;
  text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

.answers-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 12px;
}
.answer-box {
  background: rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 8px;
  padding: 12px 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.1s;
}
.answer-box.active {
  background: rgba(255,255,255,0.2);
  transform: scale(0.95);
  border-color: rgba(255,255,255,0.8);
}
.answer-key {
  font-size: 0.9rem;
  font-weight: 700;
  color: rgba(255,255,255,0.6);
  background: rgba(255,255,255,0.1);
  padding: 4px 8px;
  border-radius: 4px;
}
.answer-value {
  font-size: 1.5rem;
  font-weight: 700;
}

/* Overlays */
.countdown-overlay, .win-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 100;
  backdrop-filter: blur(8px);
}
.hidden { display: none !important; }

.countdown-text {
  font-size: 8rem;
  font-weight: 900;
  color: var(--accent-cyan);
  text-shadow: 0 0 40px rgba(6,182,212,0.8);
  animation: pulse 1s infinite alternate;
}
@keyframes pulse {
  from { transform: scale(1); }
  to { transform: scale(1.1); }
}

.win-card {
  padding: 40px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: center;
}
.win-card h2 {
  font-size: 3rem;
  font-weight: 900;
  background: linear-gradient(135deg, #ffd060, #ff9000);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.results-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 10px 0 24px;
  font-size: 1.5rem;
  font-weight: 700;
}
.result-row {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  background: rgba(0,0,0,0.3);
  padding: 12px 24px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.1);
}

.live-timer {
  position: absolute;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 2.5rem;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  color: var(--accent-cyan);
  text-shadow: 0 0 15px rgba(6,182,212,0.6);
  z-index: 50;
  background: rgba(0,0,0,0.4);
  padding: 8px 24px;
  border-radius: 100px;
  border: 1px solid rgba(255,255,255,0.1);
}

/* For player column when finished */
.finished-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 10;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 3rem;
  font-weight: 900;
  color: #ffd060;
  text-shadow: 0 4px 15px rgba(0,0,0,0.8);
  border-radius: 12px;
}