/* ===== CSS Variables ===== */
:root {
  --bg-deep: #0f172a;
  --glass-bg: rgba(15, 23, 42, 0.6);
  --glass-border: rgba(148, 163, 184, 0.15);
  --glass-blur: 12px;
  --cyan: #06b6d4;
  --cyan-light: #22d3ee;
  --cyan-dark: #0891b2;
  --fuchsia: #d946ef;
  --fuchsia-light: #f0abfc;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-dim: #64748b;
  --radius: 16px;
  --radius-sm: 10px;
  --transition: all 0.3s ease;
}

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

html,
body {
  height: 100%;
  overflow: hidden;
}

body {
  font-family: 'Outfit', system-ui, -apple-system, sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

/* ===== Animated Background Orbs ===== */
.bg-orbs {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}

.orb {
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.6;
}

.orb--cyan {
  background: rgba(6, 182, 212, 0.3);
  top: -100px;
  left: -100px;
  animation: float-cyan 20s ease-in-out infinite;
}

.orb--fuchsia {
  background: rgba(217, 70, 239, 0.3);
  bottom: -100px;
  right: -100px;
  animation: float-fuchsia 22s ease-in-out infinite;
}

@keyframes float-cyan {

  0%,
  100% {
    transform: translate(0, 0);
  }

  25% {
    transform: translate(120px, 80px);
  }

  50% {
    transform: translate(60px, 180px);
  }

  75% {
    transform: translate(-40px, 100px);
  }
}

@keyframes float-fuchsia {

  0%,
  100% {
    transform: translate(0, 0);
  }

  25% {
    transform: translate(-100px, -60px);
  }

  50% {
    transform: translate(-60px, -160px);
  }

  75% {
    transform: translate(50px, -90px);
  }
}

/* ===== Views ===== */
.view {
  display: none;
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 480px;
  padding: 16px;
}

.view.active {
  display: flex;
  flex-direction: column;
  align-items: center;
}

#game-view {
  max-width: 560px;
}

/* ===== Glass Panel ===== */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 36px 32px;
  width: 100%;
}

/* ===== Gradient Title ===== */
.gradient-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 28px;
  background: linear-gradient(135deg, var(--cyan), var(--fuchsia));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.gradient-title .emoji {
  -webkit-text-fill-color: initial;
  margin-right: 6px;
}

/* ===== Auth Tabs ===== */
.auth-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--glass-border);
}

.auth-tab {
  flex: 1;
  padding: 10px 0;
  border: none;
  background: transparent;
  color: var(--text-dim);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  border-bottom: 2px solid transparent;
}

.auth-tab.active {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.auth-tab:hover {
  color: var(--text-secondary);
}

/* ===== Auth Form ===== */
.auth-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.input-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.auth-input {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  background: rgba(15, 23, 42, 0.5);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
}

.auth-input:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
}

.auth-input::placeholder {
  color: var(--text-dim);
}

/* ===== Buttons ===== */
.btn {
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.3px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--cyan), var(--cyan-dark));
  color: #fff;
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.4);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--cyan-dark), #0e7490);
  box-shadow: 0 0 30px rgba(6, 182, 212, 0.6);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.3);
}

.btn-secondary {
  background: rgba(148, 163, 184, 0.1);
  color: var(--text-secondary);
  border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
  background: rgba(148, 163, 184, 0.2);
  color: var(--text-primary);
}

.btn-sm {
  padding: 8px 16px;
  font-size: 0.85rem;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
}

/* ===== Guest Button & Divider ===== */
.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 4px 0;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--glass-border);
}

.auth-divider span {
  font-size: 0.8rem;
  color: var(--text-dim);
  white-space: nowrap;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--glass-border);
  position: relative;
}

.btn-ghost:hover {
  color: var(--fuchsia-light);
  border-color: var(--fuchsia);
  box-shadow: 0 0 15px rgba(217, 70, 239, 0.25);
  transform: translateY(-1px);
}

.btn-ghost:active {
  transform: translateY(0);
}

/* ===== Auth Message ===== */
.auth-message {
  text-align: center;
  font-size: 0.85rem;
  min-height: 22px;
  margin-top: 4px;
  transition: var(--transition);
}

.auth-message.success {
  color: #34d399;
}

.auth-message.error {
  color: #f87171;
}

/* ===== Game View ===== */
.game-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  margin-bottom: 16px;
  padding: 0 4px;
}

.user-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.user-name {
  font-weight: 600;
  font-size: 1rem;
  color: var(--cyan-light);
}

.login-time {
  font-size: 0.75rem;
  color: var(--text-dim);
}

.header-actions {
  display: flex;
  gap: 8px;
}

/* ===== Game Canvas Container ===== */
.canvas-container {
  position: relative;
  padding: 3px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--cyan), var(--fuchsia));
  box-shadow: 0 0 30px rgba(6, 182, 212, 0.2), 0 0 60px rgba(217, 70, 239, 0.1);
  margin-bottom: 16px;
}

#game-canvas {
  display: block;
  border-radius: 12px;
  background: rgba(15, 23, 42, 0.9);
}

/* ===== Score Panel ===== */
.score-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 12px;
}

.score-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.score-label {
  font-size: 0.75rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 500;
}

.score-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.score-value.highlight {
  background: linear-gradient(135deg, var(--cyan), var(--fuchsia));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.game-controls {
  display: flex;
  gap: 8px;
}

/* ===== D-Pad (Mobile Controls) ===== */
.d-pad {
  display: none;
  grid-template-areas:
    ". up ."
    "left . right"
    ". down .";
  grid-template-columns: repeat(3, 52px);
  grid-template-rows: repeat(3, 52px);
  gap: 4px;
  margin-top: 16px;
}

.d-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  background: var(--glass-bg);
  color: var(--text-secondary);
  font-size: 1.3rem;
  cursor: pointer;
  transition: var(--transition);
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.d-btn:active {
  background: rgba(6, 182, 212, 0.2);
  border-color: var(--cyan);
  color: var(--cyan);
}

.d-btn[data-dir="up"] {
  grid-area: up;
}

.d-btn[data-dir="left"] {
  grid-area: left;
}

.d-btn[data-dir="right"] {
  grid-area: right;
}

.d-btn[data-dir="down"] {
  grid-area: down;
}

/* ===== Game Over Overlay ===== */
.game-over-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  align-items: center;
  justify-content: center;
}

.game-over-overlay.active {
  display: flex;
}

.game-over-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  min-width: 300px;
  animation: popIn 0.3s ease;
}

@keyframes popIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

.game-over-title {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 20px;
  background: linear-gradient(135deg, var(--fuchsia), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.game-over-stat {
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-size: 0.95rem;
}

.game-over-stat span {
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.1rem;
}

.game-over-card .btn {
  margin-top: 24px;
  width: 100%;
}

/* ===== History Panel ===== */
.history-panel {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  align-items: center;
  justify-content: center;
}

.history-panel.active {
  display: flex;
}

.history-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 32px;
  width: 90%;
  max-width: 500px;
  max-height: 70vh;
  overflow-y: auto;
  animation: popIn 0.3s ease;
}

.history-card h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--cyan-light);
}

.history-table {
  width: 100%;
  border-collapse: collapse;
}

.history-table th,
.history-table td {
  padding: 10px 12px;
  text-align: left;
  font-size: 0.85rem;
  border-bottom: 1px solid var(--glass-border);
}

.history-table th {
  color: var(--text-dim);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: 0.75rem;
}

.history-table td {
  color: var(--text-secondary);
}

.history-close {
  margin-top: 16px;
  width: 100%;
}

/* Custom Scrollbar */
.history-card::-webkit-scrollbar {
  width: 4px;
}

.history-card::-webkit-scrollbar-track {
  background: transparent;
}

.history-card::-webkit-scrollbar-thumb {
  background: var(--glass-border);
  border-radius: 4px;
}

/* ===== Responsive ===== */
@media (max-width: 520px) {
  .glass-panel {
    padding: 28px 20px;
  }

  .gradient-title {
    font-size: 1.6rem;
  }

  #game-canvas {
    width: 320px !important;
    height: 320px !important;
  }

  .d-pad {
    display: grid;
  }

  .score-panel {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 380px) {
  #game-canvas {
    width: 280px !important;
    height: 280px !important;
  }

  .d-pad {
    grid-template-columns: repeat(3, 46px);
    grid-template-rows: repeat(3, 46px);
  }
}