/* 
  Moon Day Quiz Styling System
  Design: Deep-space dark mode, glassmorphism, stellar neon glow, and astronomical accents.
*/

:root {
  --bg-color: #13151a; /* Dark Lunar Soil Grey */
  --panel-bg: rgba(26, 29, 36, 0.75); /* Matching grey glass panel */
  --panel-border: rgba(255, 255, 255, 0.06);
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --primary-glow: #3b82f6; /* Celestial Blue */
  --accent-cyan: #06b6d4; /* Space Neon Cyan */
  --accent-gold: #fbbf24; /* Star Gold */
  --accent-green: #10b981; /* Safe Green */
  --accent-red: #ef4444; /* Alert Crimson */
  --font-main: 'Outfit', sans-serif;
  --font-hud: 'Orbitron', sans-serif;
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset and Global Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-main);
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
}

/* Technical Telemetry Grid */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(6, 182, 212, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(6, 182, 212, 0.02) 1px, transparent 1px);
  background-size: 35px 35px;
  z-index: -1;
  pointer-events: none;
}

/* Rover Tyre Tracks Accent on Side */
body::after {
  content: "";
  position: fixed;
  top: 0;
  right: 2%;
  width: 40px;
  height: 100%;
  background-image: repeating-linear-gradient(
    45deg,
    rgba(6, 182, 212, 0.04) 0px,
    rgba(6, 182, 212, 0.04) 4px,
    transparent 4px,
    transparent 12px,
    -45deg,
    rgba(6, 182, 212, 0.04) 12px,
    rgba(6, 182, 212, 0.04) 16px,
    transparent 16px,
    transparent 24px
  );
  z-index: -1;
  pointer-events: none;
  opacity: 0.7;
}

/* Animated Starfield Canvas background */
#starfield {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  pointer-events: none;
}

/* Ambient Moon Glow */
.ambient-moon {
  position: fixed;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(165, 180, 252, 0.1) 0%, rgba(19, 21, 26, 0) 70%);
  border-radius: 50%;
  z-index: -1;
  pointer-events: none;
  filter: blur(40px);
  animation: moonPulse 8s infinite alternate ease-in-out;
}

@keyframes moonPulse {
  0% { transform: scale(1); opacity: 0.8; }
  100% { transform: scale(1.1); opacity: 1; }
}

/* Scrollbar Style */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-color);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Main Container Layout */
.app-container {
  max-width: 900px;
  margin: 0 auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  justify-content: center;
  z-index: 10;
}

/* Header & Partner Logos */
.quiz-header {
  margin-bottom: 30px;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  animation: fadeInDown 0.8s ease;
}

.logos-container {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--panel-border);
  padding: 12px 24px;
  border-radius: 16px;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.logo-text {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.logo-primary {
  font-family: var(--font-hud);
  font-size: 0.85rem;
  letter-spacing: 2px;
  font-weight: 800;
  color: var(--text-primary);
  text-shadow: 0 0 8px rgba(255, 255, 255, 0.2);
}

.logo-sub {
  font-size: 0.7rem;
  color: var(--accent-cyan);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 1px;
}

.logo-divider {
  width: 1px;
  height: 30px;
  background-color: var(--panel-border);
  margin: 0 20px;
}

/* Glassmorphism Panel base */
.glass-panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  padding: 35px;
  backdrop-filter: blur(16px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5), 
              inset 0 1px 0 rgba(255, 255, 255, 0.05);
  transition: var(--transition-smooth);
}

.glass-panel:hover {
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: 0 15px 45px rgba(0, 0, 0, 0.6), 
              inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

/* Screens System */
.screen {
  display: none;
  width: 100%;
}

.screen.active {
  display: block;
  animation: scaleIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Title text glows */
.glow-text {
  font-family: var(--font-hud);
  font-weight: 900;
  letter-spacing: 2px;
  text-align: center;
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 5px;
}

.text-red {
  background: linear-gradient(135deg, #ff8a8a 30%, var(--accent-red) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-green {
  background: linear-gradient(135deg, #a7f3d0 30%, var(--accent-green) 100% );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-cyan {
  background: linear-gradient(135deg, #e0f7fa 30%, var(--accent-cyan) 100% );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 25px;
  font-weight: 500;
}

/* Welcome Box Elements */
.welcome-box {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.welcome-desc {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  max-width: 600px;
  margin-bottom: 25px;
}

.login-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: 100%;
  border-bottom: 1px solid var(--panel-border);
  margin-bottom: 25px;
  max-width: 680px;
}

.login-tab {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 12px;
  color: var(--text-secondary);
  font-family: var(--font-hud);
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 1.5px;
  cursor: pointer;
  transition: var(--transition-smooth);
  text-align: center;
}

.login-tab:hover {
  color: var(--text-primary);
}

.login-tab.active {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  text-shadow: 0 0 8px rgba(6, 182, 212, 0.3);
}

/* Audio Mute buttons */
.btn-mute-toggle {
  background: transparent;
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  width: 34px;
  height: 34px;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--text-primary);
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.btn-mute-toggle:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 8px rgba(6, 182, 212, 0.3);
}

.btn-mute-toggle-hud {
  background: transparent;
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  width: 28px;
  height: 28px;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  color: var(--text-primary);
  font-size: 0.8rem;
  cursor: pointer;
  transition: var(--transition-smooth);
  margin-left: 12px;
}

.btn-mute-toggle-hud:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--accent-cyan);
}

.score-row {
  display: flex;
  align-items: center;
}

/* Status blinker LEDs */
.status-panel {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
  background: rgba(255, 255, 255, 0.01);
  border: 1px solid var(--panel-border);
  padding: 8px 16px;
  border-radius: 10px;
  animation: scaleIn 0.5s ease;
}

.status-panel-hud {
  display: flex;
  gap: 10px;
  font-size: 0.65rem;
  letter-spacing: 0.5px;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-top: 5px;
}

.status-item {
  display: flex;
  align-items: center;
  font-size: 0.75rem;
  font-family: var(--font-hud);
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}

.led {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  margin-right: 6px;
  display: inline-block;
}

.led-green {
  background-color: var(--accent-green);
  box-shadow: 0 0 6px var(--accent-green);
  animation: blinkLed 1.8s infinite ease-in-out;
}

.led-cyan {
  background-color: var(--accent-cyan);
  box-shadow: 0 0 6px var(--accent-cyan);
  animation: blinkLed 1.2s infinite ease-in-out;
}

@keyframes blinkLed {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* Cockpit Details/Summary Accordion Panels */
details.lunar-sensor-accordion, details.significance-panel-accordion {
  width: 100%;
  max-width: 680px;
  background: rgba(255, 255, 255, 0.01);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  margin-bottom: 25px;
  box-sizing: border-box;
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

details.lunar-sensor-accordion:hover, details.significance-panel-accordion:hover {
  border-color: rgba(6, 182, 212, 0.25);
  box-shadow: 0 0 10px rgba(6, 182, 212, 0.05);
}

details.lunar-sensor-accordion summary, details.significance-panel-accordion summary {
  list-style: none;
  padding: 16px 20px;
  cursor: pointer;
  font-family: var(--font-hud);
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--accent-cyan);
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  background: rgba(6, 182, 212, 0.02);
  outline: none;
}

details.lunar-sensor-accordion summary::-webkit-details-marker,
details.significance-panel-accordion summary::-webkit-details-marker {
  display: none;
}

/* Chevron indicator */
details.lunar-sensor-accordion summary::after, details.significance-panel-accordion summary::after {
  content: "▶";
  font-size: 0.65rem;
  transition: transform 0.3s ease;
  color: var(--text-secondary);
}

details[open].lunar-sensor-accordion summary::after, details[open].significance-panel-accordion summary::after {
  transform: rotate(90deg);
  color: var(--accent-cyan);
}

.sensor-content, .significance-content {
  padding: 20px 24px;
  border-top: 1px solid var(--panel-border);
  animation: slideDown 0.35s cubic-bezier(0.19, 1, 0.22, 1);
  box-sizing: border-box;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Sensor Inner Styles */
.sensor-header-inline {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 12px;
}

.sensor-status {
  font-family: var(--font-hud);
  font-size: 0.65rem;
  color: var(--accent-green);
  border: 1px solid var(--accent-green);
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 800;
  letter-spacing: 0.5px;
  text-shadow: 0 0 5px rgba(16, 185, 129, 0.3);
}

.sensor-body {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 20px;
}

.moon-phase-visual-container {
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 50%;
  padding: 8px;
  border: 1px solid rgba(6, 182, 212, 0.15);
  box-shadow: inset 0 0 15px rgba(6, 182, 212, 0.1);
  width: 110px;
  height: 110px;
  box-sizing: border-box;
}

.sensor-info {
  display: flex;
  flex-direction: column;
  gap: 4px;
  text-align: left;
}

.info-label {
  font-size: 0.65rem;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
  font-weight: 600;
}

.info-value {
  font-family: var(--font-hud);
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: 1px;
  margin-bottom: 4px;
  text-shadow: 0 0 8px rgba(6, 182, 212, 0.25);
  color: var(--accent-cyan);
}

.info-sub {
  font-size: 0.75rem;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}

.sensor-slider-container {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

/* Custom styled Range Slider */
.sensor-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  border: 1px solid var(--panel-border);
  box-shadow: inset 0 0 5px rgba(0,0,0,0.5);
  cursor: pointer;
}

.sensor-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-cyan);
  border: 2px solid #ffffff;
  box-shadow: 0 0 8px var(--accent-cyan);
  cursor: pointer;
  transition: transform 0.1s ease;
}

.sensor-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

.sensor-slider::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent-cyan);
  border: 2px solid #ffffff;
  box-shadow: 0 0 8px var(--accent-cyan);
  cursor: pointer;
  transition: transform 0.1s ease;
}

.sensor-slider::-moz-range-thumb:hover {
  transform: scale(1.2);
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.6rem;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
}

/* Mobile responsive fixes for simulator */
@media (max-width: 480px) {
  .sensor-body {
    flex-direction: column;
    text-align: center;
    gap: 16px;
  }
  .sensor-info {
    text-align: center;
  }
}

.significance-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 12px;
  text-align: left;
}

.significance-text:last-child {
  margin-bottom: 0;
}


.moon-badge {
  width: 80px;
  height: 80px;
  margin-bottom: 20px;
  filter: drop-shadow(0 0 15px rgba(255, 255, 255, 0.3));
  animation: float 4s infinite ease-in-out;
}

.badge-svg {
  width: 100%;
  height: 100%;
}

@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0px); }
}

/* Forms & Input Layout */
#login-form {
  width: 100%;
}

.input-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 25px;
}

@media (max-width: 650px) {
  .input-grid {
    grid-template-columns: 1fr;
  }
}

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

.input-group label {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.input-group input {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 14px 18px;
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 0.95rem;
  transition: var(--transition-smooth);
}

.input-group input:focus {
  outline: none;
  border-color: var(--accent-cyan);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.25);
}

/* Errors formatting */
.error-msg {
  color: var(--accent-red);
  font-size: 0.75rem;
  margin-top: 5px;
  display: none;
  font-weight: 500;
  animation: fadeIn 0.3s ease;
}

.input-group.invalid input {
  border-color: var(--accent-red);
  box-shadow: 0 0 8px rgba(239, 68, 68, 0.15);
}

.input-group.invalid .error-msg {
  display: block;
}

/* Category Toggle Cards */
.category-section {
  margin-bottom: 25px;
}

.section-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
  color: var(--text-secondary);
}

.category-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.category-card {
  cursor: pointer;
  position: relative;
}

.category-card input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.card-content {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 20px;
  text-align: center;
  transition: var(--transition-smooth);
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 10px;
  transition: var(--transition-smooth);
}

.card-title {
  font-family: var(--font-hud);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 1px;
  margin-bottom: 4px;
}

.card-age {
  color: var(--accent-cyan);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.card-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* Radio Checked States */
.category-card input[type="radio"]:checked + .card-content {
  background: rgba(6, 182, 212, 0.08);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.15);
}

.category-card input[type="radio"]:checked + .card-content .card-icon {
  transform: translateY(-5px) scale(1.1);
}

/* Checkbox terms style */
.terms-group {
  margin-bottom: 30px;
}

.checkbox-container {
  display: block;
  position: relative;
  padding-left: 32px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  user-select: none;
}

.checkbox-container input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.checkmark {
  position: absolute;
  top: 2px;
  left: 0;
  height: 20px;
  width: 20px;
  background-color: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--panel-border);
  border-radius: 6px;
  transition: var(--transition-smooth);
}

.checkbox-container:hover input ~ .checkmark {
  border-color: var(--text-secondary);
}

.checkbox-container input:checked ~ .checkmark {
  background-color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  box-shadow: 0 0 8px rgba(6, 182, 212, 0.3);
}

.checkmark:after {
  content: "";
  position: absolute;
  display: none;
}

.checkbox-container input:checked ~ .checkmark:after {
  display: block;
}

.checkbox-container .checkmark:after {
  left: 6px;
  top: 2px;
  width: 5px;
  height: 10px;
  border: solid var(--bg-color);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.terms-group.invalid .checkmark {
  border-color: var(--accent-red);
}

.terms-group.invalid .error-msg {
  display: block;
}

/* Button styles */
.btn-primary {
  width: 100%;
  background: linear-gradient(90deg, #3b82f6, #06b6d4);
  border: none;
  border-radius: 14px;
  padding: 16px 20px;
  color: #fff;
  font-family: var(--font-hud);
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 1.5px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(6, 182, 212, 0.4);
}

.btn-primary:active {
  transform: translateY(1px);
}

.btn-red {
  background: linear-gradient(90deg, #ef4444, #b91c1c);
  box-shadow: 0 4px 20px rgba(239, 68, 68, 0.3);
}
.btn-red:hover {
  box-shadow: 0 6px 25px rgba(239, 68, 68, 0.4);
}

.btn-secondary {
  width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 15px 20px;
  color: var(--text-primary);
  font-family: var(--font-hud);
  font-weight: 800;
  font-size: 0.9rem;
  letter-spacing: 1.5px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--text-secondary);
}

/* QUIZ INTERFACE */

/* HUD Styles */
.quiz-hud {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 20px 30px;
  margin-bottom: 20px;
  border-radius: 20px;
}

.hud-item {
  display: flex;
  flex-direction: column;
}

.category-badge {
  align-items: flex-start;
}

.score-hud {
  align-items: flex-end;
}

.hud-label {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--text-secondary);
  text-transform: uppercase;
  margin-bottom: 4px;
}

.hud-value {
  font-size: 1.1rem;
  font-weight: 800;
}

.highlight-cyan {
  color: var(--accent-cyan);
  text-shadow: 0 0 10px rgba(6, 182, 212, 0.3);
}

.highlight-gold {
  color: var(--accent-gold);
  text-shadow: 0 0 10px rgba(251, 191, 36, 0.3);
}

/* Circular Timer */
.timer-hud {
  justify-content: center;
  align-items: center;
}

.timer-container {
  position: relative;
  width: 70px;
  height: 70px;
  display: flex;
  justify-content: center;
  align-items: center;
}

.timer-svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.timer-bg {
  fill: none;
  stroke: rgba(255, 255, 255, 0.05);
  stroke-width: 3.5;
}

.timer-progress {
  fill: none;
  stroke: var(--accent-cyan);
  stroke-width: 3.5;
  stroke-linecap: round;
  transition: stroke-dasharray 1s linear, stroke 0.3s ease;
}

.timer-text {
  position: absolute;
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--text-primary);
}

/* Timer under stress state */
.timer-stress {
  stroke: var(--accent-red);
  filter: drop-shadow(0 0 5px var(--accent-red));
}

.timer-text-stress {
  color: var(--accent-red);
  animation: flash 1s infinite alternate;
}

@keyframes flash {
  0% { opacity: 0.3; }
  100% { opacity: 1; }
}

/* Quiz Body */
.quiz-body {
  position: relative;
  overflow: hidden;
}

.quiz-progress-bar {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: rgba(255, 255, 255, 0.03);
}

.quiz-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-glow), var(--accent-cyan));
  width: 0%;
  transition: width 0.4s cubic-bezier(0.1, 0.8, 0.1, 1);
  box-shadow: 0 0 8px rgba(6, 182, 212, 0.5);
}

.question-header {
  margin-bottom: 12px;
}

.question-number {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-cyan);
  letter-spacing: 2px;
}

.question-text {
  font-size: 1.35rem;
  font-weight: 500;
  line-height: 1.5;
  margin-bottom: 30px;
}

/* Option Buttons Grid */
.options-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 15px;
}

.option-btn {
  width: 100%;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  text-align: left;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.option-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateX(4px);
}

.option-letter {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 32px;
  height: 32px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--panel-border);
  border-radius: 8px;
  margin-right: 18px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  transition: var(--transition-smooth);
}

.option-btn:hover .option-letter {
  background: rgba(6, 182, 212, 0.1);
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

.option-text {
  font-size: 1rem;
  color: var(--text-primary);
  font-weight: 400;
}

/* Option feedback states */
.option-btn.correct {
  background: rgba(16, 185, 129, 0.12) !important;
  border-color: var(--accent-green) !important;
  box-shadow: 0 0 15px rgba(16, 185, 129, 0.15);
}

.option-btn.correct .option-letter {
  background: var(--accent-green) !important;
  color: var(--bg-color) !important;
  border-color: var(--accent-green) !important;
}

.option-btn.incorrect {
  background: rgba(239, 68, 68, 0.12) !important;
  border-color: var(--accent-red) !important;
  box-shadow: 0 0 15px rgba(239, 68, 68, 0.15);
}

.option-btn.incorrect .option-letter {
  background: var(--accent-red) !important;
  color: var(--bg-color) !important;
  border-color: var(--accent-red) !important;
}

/* Disabled styling when locked during click delay */
.option-btn.disabled {
  pointer-events: none;
  opacity: 0.6;
}
.option-btn.disabled.correct, .option-btn.disabled.incorrect {
  opacity: 1;
}

/* Toast warning banners */
.cheat-warning-banner {
  position: fixed;
  bottom: -120px;
  left: 5%;
  right: 5%;
  width: 90%;
  box-sizing: border-box;
  background: #7f1d1d;
  border: 1px solid var(--accent-red);
  color: #fca5a5;
  padding: 12px 20px;
  border-radius: 12px;
  z-index: 9999;
  font-size: 0.85rem;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  font-weight: 500;
  transition: bottom 0.4s cubic-bezier(0.18, 0.89, 0.32, 1.28);
  text-align: center;
}

.cheat-warning-banner.show {
  bottom: 24px;
}

/* DISQUALIFICATION INTERFACE */
.border-red {
  border-color: rgba(239, 68, 68, 0.3) !important;
}

.disqualified-icon {
  font-size: 4rem;
  margin-bottom: 20px;
  animation: pulseRate 1.5s infinite;
}

@keyframes pulseRate {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

.text-light-red {
  color: #fca5a5 !important;
}

.dq-details {
  text-align: center;
  background: rgba(239, 68, 68, 0.05);
  border: 1px solid rgba(239, 68, 68, 0.1);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 30px;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* RESULTS & LEADERBOARD SYSTEM */

.results-container {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 15px;
  margin-bottom: 20px;
}

@media (max-width: 650px) {
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.stat-card {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 18px 10px;
  text-align: center;
}

.stat-value {
  display: block;
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.cheat-notif {
  font-size: 0.85rem;
  padding: 12px 18px;
  border-radius: 10px;
  text-align: center;
  font-weight: 500;
}

.success-notif {
  background: rgba(16, 185, 129, 0.05);
  border: 1px solid rgba(16, 185, 129, 0.1);
  color: #a7f3d0;
}

.warn-notif {
  background: rgba(251, 191, 36, 0.05);
  border: 1px solid rgba(251, 191, 36, 0.15);
  color: #fde68a;
}

/* Certificate Box details */
.certificate-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.certificate-card h3 {
  font-family: var(--font-hud);
  font-size: 1.1rem;
  letter-spacing: 1px;
  margin-bottom: 5px;
}

.certificate-caption {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.certificate-preview-container {
  width: 100%;
  max-width: 600px;
  aspect-ratio: 1200 / 850;
  background: rgba(0,0,0,0.3);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  overflow: hidden;
  position: relative;
  margin-bottom: 25px;
}

.certificate-preview-container img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.loading-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-color);
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

.share-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 15px;
  width: 100%;
  max-width: 600px;
}

@media (max-width: 480px) {
  .share-actions {
    grid-template-columns: 1fr;
  }
}

/* Leaderboard Details */
.leaderboard-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin-bottom: 20px;
}

.tab-btn {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 10px;
  color: var(--text-secondary);
  font-family: var(--font-hud);
  font-weight: 800;
  font-size: 0.85rem;
  letter-spacing: 1px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

/* Dual-Mode Leaderboard Switcher */
.leaderboard-mode-switcher {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 16px;
  width: 100%;
}

.mode-btn {
  flex: 1;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 10px 14px;
  color: var(--text-secondary);
  font-family: var(--font-hud);
  font-weight: 700;
  font-size: 0.76rem;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.mode-btn:hover {
  background: rgba(6, 182, 212, 0.08);
  border-color: rgba(6, 182, 212, 0.3);
  color: var(--text-primary);
}

.mode-btn.active {
  background: rgba(6, 182, 212, 0.15);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.25);
}

.tab-btn:hover {
  background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
  background: rgba(6, 182, 212, 0.1);
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.leaderboard-list-container {
  overflow-x: auto;
  border-radius: 16px;
  border: 1px solid var(--panel-border);
}

.leaderboard-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.9rem;
}

.leaderboard-table th {
  background: rgba(255, 255, 255, 0.03);
  padding: 14px 18px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 1px;
  border-bottom: 1px solid var(--panel-border);
}

.leaderboard-table td {
  padding: 14px 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  vertical-align: middle;
}

.leaderboard-table tr:last-child td {
  border-bottom: none;
}

.leaderboard-table tr:hover td {
  background: rgba(255, 255, 255, 0.01);
}

/* Official Leaderboard Protocols Panel */
.leaderboard-rules-panel {
  background: rgba(6, 182, 212, 0.03);
  border: 1px dashed rgba(6, 182, 212, 0.2);
  border-radius: 14px;
  padding: 16px 20px;
  margin-top: 22px;
  text-align: left;
  animation: fadeIn 0.4s ease;
  box-sizing: border-box;
  width: 100%;
}

.rules-header {
  font-family: var(--font-hud);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--accent-cyan);
  margin-bottom: 10px;
  text-transform: uppercase;
}

.rules-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.rules-list li {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

.rules-list li strong {
  color: var(--text-primary);
}

/* Rank Badges */
.rank-badge {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  font-weight: 800;
  font-size: 0.8rem;
  font-family: var(--font-hud);
}

.rank-1 {
  background: radial-gradient(circle, #ffe082 0%, #ffb300 100%);
  color: #5d4037;
  box-shadow: 0 0 10px rgba(255, 179, 0, 0.4);
}

.rank-2 {
  background: radial-gradient(circle, #cfd8dc 0%, #b0bec5 100%);
  color: #37474f;
  box-shadow: 0 0 10px rgba(176, 190, 197, 0.4);
}

.rank-3 {
  background: radial-gradient(circle, #ffcc80 0%, #ffb74d 100%);
  color: #5d4037;
  box-shadow: 0 0 10px rgba(255, 183, 77, 0.4);
}

.rank-other {
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.05);
}

.astronaut-name {
  font-weight: 600;
  color: var(--text-primary);
}

.astronaut-place {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.astronaut-score {
  font-family: var(--font-hud);
  font-weight: 700;
  color: var(--accent-gold);
}

/* Common helper classes */
.text-center { text-align: center; }
.margin-top { margin-top: 20px; }
.display-none { display: none; }

/* Keyframe Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

/* Quiz Arena Header styling */
.quiz-arena-header {
  text-align: center;
  margin-bottom: 22px;
  animation: fadeInDown 0.5s ease;
  border-bottom: 1px dashed rgba(6, 182, 212, 0.15);
  padding-bottom: 12px;
  width: 100%;
}

.arena-title {
  font-family: var(--font-hud);
  font-size: 1.15rem;
  font-weight: 900;
  letter-spacing: 2px;
  background: linear-gradient(135deg, var(--text-primary) 30%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 5px;
}

.arena-subtitle {
  font-size: 0.72rem;
  color: var(--text-secondary);
  letter-spacing: 0.6px;
  text-transform: uppercase;
}

/* Share status workflow tip styling */
.share-tip {
  font-size: 0.8rem;
  color: var(--text-secondary);
  background: rgba(6, 182, 212, 0.03);
  border: 1px dashed rgba(6, 182, 212, 0.12);
  border-radius: 10px;
  padding: 10px 14px;
  margin-top: 15px;
  text-align: center;
  line-height: 1.4;
  box-sizing: border-box;
}

/* Mobile Viewport Cockpit Optimization Overrides */
@media (max-width: 480px) {
  .glass-panel {
    padding: 20px !important;
    border-radius: 16px !important;
  }

  .login-tabs {
    margin-bottom: 28px !important;
  }

  details.lunar-sensor-accordion {
    margin-bottom: 22px !important;
  }

  details.significance-panel-accordion {
    margin-bottom: 28px !important;
  }

  #login-form {
    margin-top: 10px !important;
  }

  .moon-badge {
    width: 55px;
    height: 55px;
    margin-bottom: 10px;
  }
  
  .glow-text {
    font-size: 1.7rem !important;
    letter-spacing: 1px;
  }
  
  .subtitle {
    font-size: 0.75rem !important;
    margin-bottom: 12px;
  }
  
  .welcome-desc {
    font-size: 0.78rem !important;
    line-height: 1.4;
    margin-bottom: 12px;
  }
  
  .status-panel {
    gap: 8px;
    padding: 6px 12px;
    margin-bottom: 15px;
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .status-item {
    font-size: 0.65rem;
  }
  
  /* Details Summary Accordions */
  details.lunar-sensor-accordion summary, details.significance-panel-accordion summary {
    padding: 12px 16px;
    font-size: 0.75rem;
  }
  
  .sensor-content, .significance-content {
    padding: 16px;
  }
  
  /* Registration inputs */
  .input-grid {
    gap: 10px;
    margin-bottom: 15px;
  }
  
  .input-group label {
    font-size: 0.75rem;
    margin-bottom: 5px;
  }
  
  .input-group input {
    padding: 11px 14px;
    font-size: 0.85rem;
  }
  
  /* Category card stack and compression */
  .category-cards {
    grid-template-columns: 1fr !important;
    gap: 8px;
  }
  
  .category-card {
    padding: 10px 14px;
  }
  
  .card-content {
    display: flex;
    flex-direction: row;
    align-items: center;
    text-align: left;
    gap: 12px;
  }
  
  .card-icon {
    font-size: 1.4rem;
    margin-bottom: 0;
  }
  
  .card-title {
    font-size: 0.8rem;
    margin-bottom: 1px;
  }
  
  .card-age {
    font-size: 0.7rem;
    margin-bottom: 0;
  }
  
  .card-desc {
    display: none; /* Hide verbose details to make cockpit form ultra clean */
  }
  
  /* Button resizing */
  .btn-primary, .btn-secondary {
    padding: 11px 18px;
    font-size: 0.78rem;
    letter-spacing: 1px;
  }
  
  /* Quiz HUD */
  .quiz-hud {
    padding: 8px 10px;
    gap: 6px;
  }
  
  .hud-item {
    padding: 5px 6px;
  }
  
  .hud-label {
    font-size: 0.52rem;
  }
  
  .hud-value {
    font-size: 0.85rem;
  }
  
  /* Option buttons during quiz */
  .options-grid {
    gap: 8px;
  }
  
  .option-btn {
    padding: 10px 14px;
    font-size: 0.8rem;
  }
  
  .option-letter {
    width: 20px;
    height: 20px;
    font-size: 0.7rem;
  }
  
  /* Results credentials preview card */
  .certificate-preview-container {
    padding: 4px;
    border-radius: 8px;
  }
}