/* ===================================
   Global Variables & Reset
   =================================== */
:root {
  /* Casino Neon Palette - Black Base */
  --color-primary: #FF1744;
  --color-secondary: #00E5FF;
  --color-accent: #FFD600;
  --color-success: #00FF41;
  --color-error: #FF0000;
  --color-warning: #FFC400;

  /* Casino Gradients */
  --gradient-primary: linear-gradient(135deg, #FF1744 0%, #F50057 50%, #C51162 100%);
  --gradient-secondary: linear-gradient(135deg, #00E5FF 0%, #00B8D4 50%, #0091EA 100%);
  --gradient-success: linear-gradient(135deg, #00FF41 0%, #00E676 100%);
  --gradient-gold: linear-gradient(135deg, #FFD600 0%, #FFAB00 50%, #FF6F00 100%);

  /* Neon Colors */
  --neon-red: #FF1744;
  --neon-cyan: #00E5FF;
  --neon-gold: #FFD600;
  --neon-green: #00FF41;
  --neon-purple: #E040FB;
  --neon-orange: #FF6D00;

  /* Neutral Colors */
  --color-neutral-dark: #212121;
  --color-neutral-medium: #757575;
  --color-neutral-light: #BDBDBD;
  --color-neutral-bg: #000000;
  --color-white: #FFFFFF;

  /* Lives & Power-ups */
  --color-lives: #FF1744;
  --color-fifty: #FF6D00;
  --color-skip: #FFD600;
  --color-hint: #00E5FF;

  /* Grid States */
  --color-correct-bg: #00FF41;
  --color-incorrect-bg: #FF0000;
  --color-skipped-bg: #FFC400;

  /* Typography */
  --font-heading: 'Segoe UI', 'Arial', sans-serif;
  --font-body: 'Segoe UI', system-ui, sans-serif;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
}

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

html {
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background: #000000;
  color: var(--color-white);
  line-height: 1.5;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* Animated background shapes */
.bg-shapes {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.bg-shape {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.7;
  animation-timing-function: ease-in-out;
  animation-iteration-count: infinite;
  z-index: 1;
}

.shape1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 23, 68, 0.8), transparent);
  top: 10%;
  left: 10%;
  animation: float1 20s infinite;
}

.shape2 {
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.8), transparent);
  top: 60%;
  right: 10%;
  animation: float2 25s infinite;
}

.shape3 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(255, 214, 0, 0.8), transparent);
  bottom: 20%;
  left: 15%;
  animation: float3 18s infinite;
}

.shape4 {
  width: 250px;
  height: 250px;
  background: radial-gradient(circle, rgba(0, 255, 65, 0.7), transparent);
  top: 30%;
  right: 20%;
  animation: float4 22s infinite;
}

.shape5 {
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(224, 64, 251, 0.7), transparent);
  bottom: 30%;
  right: 30%;
  animation: float5 28s infinite;
}

@keyframes float1 {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(50px, -30px) scale(1.1);
  }
  66% {
    transform: translate(-30px, 40px) scale(0.9);
  }
}

@keyframes float2 {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(-40px, 50px) scale(1.05);
  }
  66% {
    transform: translate(30px, -40px) scale(0.95);
  }
}

@keyframes float3 {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(60px, 20px) scale(1.15);
  }
  66% {
    transform: translate(-50px, -30px) scale(0.85);
  }
}

@keyframes float4 {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(-50px, -40px) scale(1.08);
  }
  66% {
    transform: translate(40px, 50px) scale(0.92);
  }
}

@keyframes float5 {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  33% {
    transform: translate(30px, -50px) scale(1.12);
  }
  66% {
    transform: translate(-40px, 30px) scale(0.88);
  }
}

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 900;
  line-height: 1.2;
  color: var(--color-white);
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.25rem;
}

p {
  margin-bottom: var(--spacing-md);
}

/* ===================================
   Layout & App Container
   =================================== */
#app {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  position: relative;
  overflow-y: auto;
  overflow-x: hidden;
  z-index: 10;
}

/* ===================================
   Header
   =================================== */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
  border-bottom: 3px solid transparent;
  border-image: linear-gradient(90deg, var(--neon-red), var(--neon-cyan), var(--neon-gold)) 1;
  margin-bottom: var(--spacing-lg);
  box-shadow: 0 5px 30px rgba(255, 23, 68, 0.4);
}

.header-content {
  flex: 1;
}

.logo {
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: 2px;
  margin-bottom: var(--spacing-xs);
  color: var(--neon-gold);
}

@keyframes neonPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.8; }
}

.round-info {
  display: flex;
  gap: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--neon-cyan);
  flex-wrap: wrap;
  text-shadow: 0 0 10px var(--neon-cyan);
}

#round-name {
  font-weight: 700;
  color: var(--neon-gold);
  text-shadow: 0 0 15px var(--neon-gold);
}

/* ===================================
   Status Bar
   =================================== */
.status-bar {
  background: rgba(0, 0, 0, 0.8);
  border: 2px solid var(--neon-red);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow:
    0 0 30px rgba(255, 23, 68, 0.5),
    0 0 60px rgba(0, 229, 255, 0.3),
    inset 0 0 30px rgba(255, 214, 0, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
  backdrop-filter: blur(10px);
}

.status-section {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* Lives Display */
.lives-display {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.hearts {
  display: flex;
  gap: var(--spacing-xs);
}

.heart {
  font-size: 1.5rem;
  color: var(--color-lives);
  transition: transform var(--transition-fast);
}

.heart.lost {
  opacity: 0.2;
  filter: grayscale(100%);
}

.heart.gained {
  animation: heartGain 0.5s ease;
}

@keyframes heartGain {
  0% {
    transform: translateY(-20px) scale(0);
    opacity: 0;
  }
  50% {
    transform: translateY(0) scale(1.2);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

/* Score & Streak Display */
.score-display,
.streak-display {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.label {
  font-weight: 700;
  color: var(--neon-cyan);
  font-size: 0.875rem;
  text-shadow: 0 0 10px var(--neon-cyan);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.value {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--neon-gold);
  font-variant-numeric: tabular-nums;
  text-shadow: 0 0 10px var(--neon-gold);
}

.streak-display .icon {
  font-size: 1.25rem;
}

.streak-display .value {
  color: var(--color-warning);
}

/* Power-ups Section */
.powerups-section {
  gap: var(--spacing-sm);
}

.powerup-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.6);
  border: 2px solid var(--color-fifty);
  cursor: help;
  transition: all var(--transition-fast);
  min-width: 70px;
  box-shadow: 0 0 20px rgba(255, 109, 0, 0.5);
}

.powerup-item:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 0 30px rgba(255, 109, 0, 0.8);
}

.powerup-item[data-powerup="fiftyFifty"] {
  border-color: var(--neon-orange);
  box-shadow: 0 0 20px var(--neon-orange);
}

.powerup-item[data-powerup="fiftyFifty"]:hover {
  box-shadow: 0 0 40px var(--neon-orange);
}

.powerup-item[data-powerup="skip"] {
  border-color: var(--neon-gold);
  box-shadow: 0 0 20px var(--neon-gold);
}

.powerup-item[data-powerup="skip"]:hover {
  box-shadow: 0 0 40px var(--neon-gold);
}

.powerup-item[data-powerup="hint"] {
  border-color: var(--neon-cyan);
  box-shadow: 0 0 20px var(--neon-cyan);
}

.powerup-item[data-powerup="hint"]:hover {
  box-shadow: 0 0 40px var(--neon-cyan);
}

.powerup-item.disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.powerup-icon {
  font-size: 1.25rem;
}

.powerup-label {
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--color-white);
}

.powerup-count {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--neon-green);
  text-shadow: 0 0 8px var(--neon-green);
}

/* ===================================
   Main Screen
   =================================== */
.main-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xl);
}

/* ===================================
   Bottom Navigation
   =================================== */
.bottom-nav {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--spacing-lg);
}

/* ===================================
   Buttons
   =================================== */
button {
  font-family: var(--font-body);
  font-size: 1rem;
  cursor: pointer;
  border: none;
  transition: all var(--transition-fast);
}

.primary-btn {
  background: var(--gradient-primary);
  color: white;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-lg);
  font-weight: 900;
  font-size: 1.125rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  box-shadow:
    0 0 30px var(--neon-red),
    0 5px 15px rgba(0, 0, 0, 0.5);
  border: 2px solid var(--neon-gold);
  position: relative;
  overflow: hidden;
}

.primary-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: left 0.5s;
}

.primary-btn:hover::before {
  left: 100%;
}

.primary-btn:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow:
    0 0 50px var(--neon-red),
    0 0 70px var(--neon-gold),
    0 8px 20px rgba(0, 0, 0, 0.5);
}

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

.primary-btn:disabled {
  background: var(--color-neutral-medium);
  cursor: not-allowed;
  transform: none;
}

.secondary-btn {
  background: var(--color-white);
  color: var(--color-primary);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-md);
  font-weight: 600;
  border: 2px solid var(--color-primary);
}

.secondary-btn:hover {
  background: var(--color-primary);
  color: white;
}

.nav-btn {
  background: var(--color-white);
  color: var(--color-neutral-dark);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  border: 1px solid var(--color-neutral-light);
  box-shadow: var(--shadow-sm);
}

.nav-btn:hover {
  background: var(--color-neutral-light);
  border-color: var(--color-neutral-medium);
}

.icon-btn {
  background: transparent;
  font-size: 1.5rem;
  padding: var(--spacing-sm);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-btn:hover {
  background: var(--color-neutral-light);
}

/* ===================================
   Screens & Visibility
   =================================== */
.screen {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-lg);
}

.hidden {
  display: none !important;
}

/* ===================================
   Round Selection Screen
   =================================== */
#round-selection-screen h2 {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.daily-score {
  text-align: center;
  padding: var(--spacing-lg);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-xl);
}

.daily-score .label {
  font-size: 1rem;
  margin-right: var(--spacing-sm);
}

.daily-score .value {
  font-size: 2rem;
  color: var(--color-secondary);
}

.rounds-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.round-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  border: 2px solid transparent;
}

.round-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.round-card[data-round="morning"] {
  border-color: #FCD34D;
}

.round-card[data-round="afternoon"] {
  border-color: #F97316;
}

.round-card[data-round="evening"] {
  border-color: #7C3AED;
}

.round-card-header h3 {
  margin-bottom: var(--spacing-xs);
}

.time-window {
  color: var(--color-neutral-medium);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-md);
}

.round-card-body {
  margin: var(--spacing-md) 0;
}

.round-status {
  font-weight: 600;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  display: inline-block;
  margin-bottom: var(--spacing-sm);
}

.round-status[data-status="available"] {
  background: var(--color-success);
  color: white;
}

.round-status[data-status="completed"] {
  background: var(--color-primary);
  color: white;
}

.round-status[data-status="locked"] {
  background: var(--color-neutral-light);
  color: var(--color-neutral-medium);
}

.round-score {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
}

.play-round-btn {
  width: 100%;
  padding: var(--spacing-md);
  background: var(--color-primary);
  color: white;
  border-radius: var(--radius-md);
  font-weight: 600;
  margin-top: var(--spacing-md);
}

.play-round-btn:hover:not(:disabled) {
  background: #1E3A8A;
}

.play-round-btn:disabled {
  background: var(--color-neutral-medium);
  cursor: not-allowed;
}

#back-to-game-btn {
  display: block;
  margin: var(--spacing-xl) auto 0;
}

/* ===================================
   Leaderboard Screen
   =================================== */
#leaderboard-screen h2 {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.leaderboard-tabs {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.tab-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-white);
  border: 2px solid var(--color-neutral-light);
  border-radius: var(--radius-md);
  font-weight: 600;
  color: var(--color-neutral-dark);
}

.tab-btn.active {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.tab-btn:hover:not(.active) {
  border-color: var(--color-primary);
}

.leaderboard-content {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-xl);
  min-height: 400px;
}

.leaderboard-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.leaderboard-entry {
  display: grid;
  grid-template-columns: 60px 1fr 100px 100px;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--color-neutral-bg);
  border-radius: var(--radius-md);
  align-items: center;
}

.leaderboard-entry.current-user {
  background: rgba(30, 64, 175, 0.1);
  border: 2px solid var(--color-primary);
}

.rank {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-neutral-medium);
  text-align: center;
}

.rank.top3 {
  color: var(--color-warning);
}

.username {
  font-weight: 600;
  color: var(--color-neutral-dark);
}

.leaderboard-score {
  font-weight: 700;
  color: var(--color-primary);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.completion-time {
  font-size: 0.875rem;
  color: var(--color-neutral-medium);
  text-align: right;
}

#back-from-leaderboard-btn {
  display: block;
  margin: 0 auto;
}

/* ===================================
   Footer
   =================================== */
footer {
  margin-top: auto;
  padding: var(--spacing-xl) 0 var(--spacing-md);
  border-top: 1px solid var(--color-neutral-light);
}

.footer-links {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  font-size: 0.875rem;
  color: var(--color-neutral-medium);
}

.footer-links a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-secondary);
  text-decoration: underline;
}

.separator {
  color: var(--color-neutral-light);
}

/* ===================================
   Advertisement Containers
   =================================== */
.ad-container {
  display: flex;
  justify-content: center;
  align-items: center;
  margin: var(--spacing-lg) 0;
}

.ad-top {
  margin-bottom: var(--spacing-xl);
}

.ad-banner {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.ad-sidebar {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 100;
}

.ad-sidebar-img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

/* ===================================
   Feedback Overlay (replaces alerts)
   =================================== */
.feedback-overlay {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2000;
  background: rgba(0, 0, 0, 0.95);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
  min-width: 400px;
  text-align: center;
  animation: feedbackSlideIn 0.3s ease;
}

@keyframes feedbackSlideIn {
  from {
    opacity: 0;
    transform: translate(-50%, -60%);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}

.feedback-content {
  color: white;
}

.feedback-icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-md);
  animation: iconBounce 0.5s ease;
}

@keyframes iconBounce {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.2); }
}

.feedback-message {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.feedback-details {
  font-size: 1rem;
  opacity: 0.9;
  line-height: 1.6;
}

.feedback-overlay.correct .feedback-icon::before {
  content: '✓';
  color: var(--color-success);
}

.feedback-overlay.incorrect .feedback-icon::before {
  content: '✗';
  color: var(--color-error);
}

.feedback-overlay.skip .feedback-icon::before {
  content: '➜';
  color: var(--color-warning);
}

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  .status-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .status-section {
    justify-content: space-between;
  }

  .powerups-section {
    justify-content: space-around;
  }

  .leaderboard-entry {
    grid-template-columns: 50px 1fr 80px;
    gap: var(--spacing-sm);
  }

  .completion-time {
    grid-column: 2 / 4;
    text-align: left;
    font-size: 0.75rem;
  }

  .rounds-container {
    grid-template-columns: 1fr;
  }

  .ad-sidebar {
    display: none;
  }

  .feedback-overlay {
    min-width: 90%;
    padding: var(--spacing-lg);
  }

  .feedback-message {
    font-size: 1.25rem;
  }

  .feedback-icon {
    font-size: 3rem;
  }
}

@media (max-width: 480px) {
  #app {
    padding: var(--spacing-sm);
  }

  .round-info {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .bottom-nav {
    flex-direction: column;
  }

  .nav-btn {
    width: 100%;
  }
}

/* ===================================
   Accessibility
   =================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}