/* Variables for theme */
:root {
  --bg: #ffffff;
  --text: #333;
  --card: #fff;
  --accent: #e91e63;
  --shadow: rgba(0, 0, 0, 0.2);
}

body.dark {
  --bg: #121212;
  --text: #eee;
  --card: #1f1f1f;
  --shadow: rgba(0, 0, 0, 0.4);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0;
  background: linear-gradient(135deg, #fbc2eb 0%, #a6c1ee 100%);
  font-family: 'Khmer OS Battambang', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  overflow: hidden;
  position: relative;
  color: var(--text);
  transition: background 0.5s, color 0.5s;
}

body.dark {
  background: linear-gradient(135deg, #121212 0%, #1a1a2e 100%);
}

/* Theme Toggle */
#themeToggle {
  position: absolute;
  top: 15px;
  right: 15px;
  border: none;
  background: var(--card);
  color: var(--text);
  font-size: 18px;
  padding: 8px 12px;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 2px 8px var(--shadow);
  z-index: 10;
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--card);
  color: var(--text);
  padding: 12px 18px;
  border-radius: 8px;
  opacity: 0;
  transition: opacity 0.4s;
  z-index: 999;
  box-shadow: 0 4px 12px var(--shadow);
}

.toast.show {
  opacity: 1;
}

/* Falling Hearts */
.falling-heart {
  position: absolute;
  top: -50px;
  font-size: 24px;
  animation: fall 6s linear infinite;
  user-select: none;
  opacity: 0.8;
}

@keyframes fall {
  0% { transform: translateY(-50px) rotate(0deg); opacity: 0.8; }
  100% { transform: translateY(110vh) rotate(360deg); opacity: 0; }
}

/* Love Box */
.love-box {
  background: var(--card);
  border-radius: 20px;
  box-shadow: 0 10px 40px var(--shadow);
  padding: 30px 25px;
  width: 90%;
  max-width: 600px;
  text-align: center;
  z-index: 1;
  animation: fadeIn 1s ease;
  transition: background 0.5s, box-shadow 0.5s;
}

h1 {
  color: var(--accent);
  font-size: 28px;
  margin-top: 10px;
}

/* Audio Player */
.audio-player {
  width: 100%;
  max-width: 400px;
  margin: 10px auto 20px;
  border-radius: 50px;
  overflow: hidden;
  box-shadow: 0 0 15px rgba(255, 0, 0, 0.4);
}

/* Heart Animation */
.heart {
  font-size: 50px;
  margin: 15px 0;
  animation: pulse 1.2s infinite;
}

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

/* Text */
p {
  font-size: 18px;
  line-height: 1.7;
  min-height: 140px;
}

/* Buttons */
.buttons {
  margin-top: 20px;
}

button {
  padding: 12px 22px;
  margin: 10px 8px;
  font-size: 16px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: 0.3s ease;
  font-family: 'Khmer OS Battambang', sans-serif;
}

.yes-btn {
  background-color: #4caf50;
  color: white;
}

.no-btn {
  background-color: #f44336;
  color: white;
}

.yes-btn:hover {
  background-color: #388e3c;
}

.no-btn:hover {
  background-color: #d32f2f;
}

/* Textarea */
textarea {
  width: 100%;
  padding: 12px;
  margin-top: 20px;
  border-radius: 10px;
  border: 1px solid #ccc;
  font-size: 16px;
  resize: vertical;
  font-family: 'Khmer OS Battambang', sans-serif;
  background: var(--bg);
  color: var(--text);
  border-color: var(--text);
}

.send-reply {
  background-color: #2196f3;
  color: white;
  margin-top: 12px;
}

.send-reply:hover {
  background-color: #1976d2;
}

/* Response */
.response {
  margin-top: 25px;
  font-size: 18px;
  color: var(--accent);
  min-height: 40px;
}

/* Signature */
.signature {
  margin-top: 30px;
  font-style: italic;
  color: #777;
}

/* Counter and Timer */
.stats {
  margin-top: 20px;
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 15px;
}

.stat-box {
  padding: 10px 15px;
  background: rgba(233, 30, 99, 0.1);
  border-radius: 10px;
  font-weight: bold;
  color: var(--accent);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes confettiFall {
  0% { transform: translateY(-20px) rotate(0deg); opacity: 1; }
  100% { transform: translateY(100vh) rotate(360deg); opacity: 0; }
}

/* Responsive */
@media (max-width: 480px) {
  .love-box {
    padding: 20px 15px;
  }
  
  h1 {
    font-size: 24px;
  }
  
  .heart {
    font-size: 40px;
  }
  
  p {
    font-size: 16px;
  }
  
  button {
    padding: 10px 18px;
    font-size: 15px;
  }
}