/* CSS Variables for Cosmic Themes */
:root {
  --neon-gold: #ffb703;
  --neon-pink: #ff2a85;
  --neon-cyan: #00f0ff;
  --neon-purple: #bd00ff;
  
  --bg-color: #030308;
  --panel-bg: rgba(10, 10, 20, 0.55);
  --panel-border: rgba(255, 255, 255, 0.09);
  
  --primary-glow: var(--neon-gold);
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --font-title: 'Cinzel', serif;
  --font-body: 'Outfit', sans-serif;
  
  --safe-top: env(safe-area-inset-top, 16px);
  --safe-bottom: env(safe-area-inset-bottom, 16px);
}

/* Reset and Core Layout */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

body, html {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: var(--bg-color);
  font-family: var(--font-body);
  color: var(--text-primary);
}

#bg-canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  display: block;
}

/* Glassmorphism Buttons (Floating UI) */
.glass-btn {
  position: absolute;
  z-index: 10;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.glass-btn:active {
  transform: scale(0.9);
  background: rgba(255, 255, 255, 0.15);
  box-shadow: 0 0 15px var(--primary-glow);
}

.btn-left {
  top: calc(var(--safe-top) + 0px);
  left: 16px;
}

.btn-left-2 {
  top: calc(var(--safe-top) + 64px);
  left: 16px;
}

.btn-right {
  top: calc(var(--safe-top) + 0px);
  right: 16px;
}

.glass-btn .icon {
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Glassmorphism Panel (Customization) */
.glass-panel {
  position: absolute;
  z-index: 20;
  top: calc(var(--safe-top) + 0px);
  right: 16px;
  width: 280px;
  padding: 24px;
  border-radius: 20px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
  transition: opacity 0.3s cubic-bezier(0.2, 0.8, 0.2, 1), transform 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  opacity: 1;
  transform: scale(1);
}

.glass-panel.hidden {
  opacity: 0;
  transform: scale(0.9) translateY(-20px);
  pointer-events: none;
}

.glass-panel h3 {
  font-family: var(--font-title);
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  margin-bottom: 20px;
  color: var(--primary-glow);
  text-transform: uppercase;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.1);
}

.close-x {
  position: absolute;
  top: 16px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 1.5rem;
  cursor: pointer;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: color 0.2s;
}

.close-x:hover {
  color: var(--text-primary);
}

/* Form Controls */
.control-group {
  margin-bottom: 20px;
}

.control-group:last-child {
  margin-bottom: 0;
}

.control-group label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

select {
  width: 100%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 10px 14px;
  border-radius: 10px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  outline: none;
  cursor: pointer;
  transition: all 0.3s;
}

select:focus {
  border-color: var(--primary-glow);
  box-shadow: 0 0 10px rgba(255, 255, 255, 0.1);
}

.slider-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.slider-header span:first-child {
  color: var(--text-secondary);
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.05em;
}

.slider-header span:last-child {
  font-weight: 600;
  color: var(--primary-glow);
}

/* Custom Range Input */
input[type="range"] {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.1);
  outline: none;
  margin: 10px 0;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--text-primary);
  border: 2px solid var(--primary-glow);
  box-shadow: 0 0 8px var(--primary-glow);
  cursor: pointer;
  transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:active {
  transform: scale(1.3);
}

.sub-label {
  font-size: 0.7rem;
  color: rgba(255, 255, 255, 0.4);
  display: block;
  margin-top: 4px;
}

/* Install Group */
.install-group {
  border-top: 1px solid rgba(255, 255, 255, 0.07);
  padding-top: 16px;
  margin-top: 4px;
}

.install-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 20px;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: linear-gradient(135deg, rgba(255, 120, 30, 0.25), rgba(255, 42, 133, 0.18));
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
  box-shadow: 0 0 18px rgba(255, 120, 30, 0.15);
  letter-spacing: 0.02em;
}

.install-btn:hover {
  background: linear-gradient(135deg, rgba(255, 140, 50, 0.45), rgba(255, 60, 140, 0.35));
  box-shadow: 0 0 28px rgba(255, 130, 40, 0.35);
  transform: translateY(-1px);
}

.install-btn:active {
  transform: scale(0.97) translateY(0);
}

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

.install-status {
  font-size: 0.75rem;
  text-align: center;
  margin-top: 8px;
  min-height: 18px;
  color: rgba(255, 255, 255, 0.5);
  letter-spacing: 0.03em;
  transition: color 0.3s;
}

.install-status.success {
  color: #4eff91;
}

.install-status.info {
  color: rgba(255, 200, 80, 0.75);
}

/* Download button variant */
.download-btn {
  text-decoration: none;
  margin-top: 8px;
  background: linear-gradient(135deg, rgba(30, 80, 200, 0.30), rgba(0, 200, 255, 0.20));
  border-color: rgba(0, 200, 255, 0.3);
  box-shadow: 0 0 18px rgba(0, 190, 255, 0.12);
}

.download-btn:hover {
  background: linear-gradient(135deg, rgba(40, 100, 240, 0.48), rgba(0, 220, 255, 0.35));
  box-shadow: 0 0 26px rgba(0, 210, 255, 0.3);
}

.info-note {
  font-size: 0.68rem;
  color: rgba(255, 255, 255, 0.32);
  text-align: center;
  margin-top: 4px;
  letter-spacing: 0.02em;
}

/* Hint Bar (Bottom UI) */
#hint-bar {
  position: absolute;
  bottom: calc(var(--safe-bottom) + 16px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  text-align: center;
  pointer-events: none;
}

#hint-bar p {
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
  animation: pulse-glow 3s infinite ease-in-out;
}

/* Overlays & Modals */
.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  opacity: 1;
}

.overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.overlay.hidden .glass-panel-heavy {
  transform: scale(0.8) translateY(30px);
}

/* Heavy Glassmorphism for Overlays */
.glass-panel-heavy {
  width: 100%;
  max-width: 360px;
  padding: 36px 24px;
  border-radius: 28px;
  background: rgba(15, 15, 30, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.15);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8), 0 0 30px rgba(var(--primary-glow), 0.15);
  backdrop-filter: blur(30px);
  -webkit-backdrop-filter: blur(30px);
  text-align: center;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  transform: scale(1);
}

.love-card h4#love-card-keyword {
  font-family: var(--font-title);
  font-size: 1.3rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary-glow);
  margin: 16px 0 10px 0;
  text-shadow: 0 0 12px rgba(255,255,255,0.2);
}

.love-card p {
  font-size: 1.05rem;
  line-height: 1.65;
  margin: 0 0 24px 0;
  color: rgba(255, 255, 255, 0.92);
  font-style: italic;
}

.heart-pulse {
  font-size: 3rem;
  display: inline-block;
  animation: heart-beat 1.2s infinite cubic-bezier(0.25, 0.8, 0.25, 1);
  filter: drop-shadow(0 0 10px var(--neon-pink));
}

/* Buttons inside Modals */
.action-btn {
  background: linear-gradient(135deg, var(--neon-pink), #ff5e62);
  border: none;
  outline: none;
  padding: 12px 32px;
  color: white;
  font-family: var(--font-body);
  font-weight: 600;
  border-radius: 30px;
  cursor: pointer;
  box-shadow: 0 5px 15px rgba(255, 42, 133, 0.3);
  transition: all 0.3s;
}

.action-btn:active {
  transform: scale(0.95);
  box-shadow: 0 2px 5px rgba(255, 42, 133, 0.3);
}

/* Modal Form Styles */
.modal-card h3 {
  font-family: var(--font-title);
  font-size: 1.3rem;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
  color: var(--neon-pink);
}

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

textarea {
  width: 100%;
  height: 100px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 16px;
  border-radius: 16px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  resize: none;
  margin-bottom: 24px;
  transition: all 0.3s;
}

textarea:focus {
  border-color: var(--neon-pink);
  box-shadow: 0 0 15px rgba(255, 42, 133, 0.15);
}

.modal-buttons {
  display: flex;
  gap: 12px;
}

.modal-buttons button {
  flex: 1;
}

.secondary-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-secondary);
  padding: 12px 24px;
  font-family: var(--font-body);
  font-weight: 500;
  border-radius: 30px;
  cursor: pointer;
  transition: all 0.3s;
}

.secondary-btn:active {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

/* Animations */
@keyframes heart-beat {
  0% { transform: scale(1); }
  14% { transform: scale(1.3); }
  28% { transform: scale(1); }
  42% { transform: scale(1.3); }
  70% { transform: scale(1); }
}

@keyframes pulse-glow {
  0%, 100% {
    opacity: 0.4;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
  }
  50% {
    opacity: 0.9;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8), 0 0 10px rgba(255, 255, 255, 0.3);
  }
}

/* Mobile Adjustments (portrait optimization) */
@media (max-width: 480px) {
  .glass-panel {
    width: calc(100% - 32px);
    right: 16px;
  }
  .glass-panel-heavy {
    padding: 30px 20px;
  }
  .love-card p {
    font-size: 1.15rem;
  }
}