:root {
  --bg-1: #ffecd2;
  --bg-2: #fcb69f;
  --bg-3: #a1c4fd;
  --bg-4: #c2e9fb;
  --card-bg: rgba(255,255,255,0.85);
  --text-primary: #2d1b4e;
  --text-secondary: #5a3e7a;
  --accent: #ff6b6b;
  --accent-2: #feca57;
  --shadow: rgba(45, 27, 78, 0.1);
}

.dark-mode {
  --card-bg: rgba(30, 20, 50, 0.85);
  --text-primary: #f0e6ff;
  --text-secondary: #c9b8e8;
  --shadow: rgba(0, 0, 0, 0.3);
}

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

body {
  font-family: 'Quicksand', sans-serif;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 1.5s ease;
}

.bg-animated {
  background: linear-gradient(-45deg, var(--bg-1), var(--bg-2), var(--bg-3), var(--bg-4));
  background-size: 400% 400%;
  animation: gradientShift 15s ease infinite;
  min-height: 100vh;
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  25% { background-position: 50% 100%; }
  50% { background-position: 100% 50%; }
  75% { background-position: 50% 0%; }
  100% { background-position: 0% 50%; }
}

.hero-title {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: clamp(3rem, 12vw, 8rem);
  color: var(--text-primary);
  animation: bounceIn 1s cubic-bezier(0.68, -0.55, 0.265, 1.55) forwards;
  opacity: 0;
  transform: scale(0.3);
  text-shadow: 0 4px 20px rgba(255, 107, 107, 0.3);
  letter-spacing: -0.03em;
  line-height: 1;
}

@keyframes bounceIn {
  0% { opacity: 0; transform: scale(0.3) rotate(-5deg); }
  50% { opacity: 1; transform: scale(1.05) rotate(2deg); }
  70% { transform: scale(0.95) rotate(-1deg); }
  100% { opacity: 1; transform: scale(1) rotate(0deg); }
}

.wave-hand {
  display: inline-block;
  animation: wave 2.5s ease-in-out infinite;
  animation-delay: 1s;
  transform-origin: 70% 70%;
}

@keyframes wave {
  0%, 100% { transform: rotate(0deg); }
  10% { transform: rotate(14deg); }
  20% { transform: rotate(-8deg); }
  30% { transform: rotate(14deg); }
  40% { transform: rotate(-4deg); }
  50% { transform: rotate(10deg); }
  60% { transform: rotate(0deg); }
}

.subtitle-greeting {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 300;
  font-size: clamp(1.2rem, 4vw, 2.5rem);
  color: var(--text-secondary);
  min-height: 3rem;
  animation: fadeInUp 0.8s ease forwards;
  animation-delay: 0.6s;
  opacity: 0;
}

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

.greeting-card {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  border-radius: 24px;
  box-shadow: 0 8px 32px var(--shadow), 0 2px 8px var(--shadow);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 2rem;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  animation: cardAppear 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
  opacity: 0;
  transform: translateY(30px) scale(0.9);
}

@keyframes cardAppear {
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.greeting-card:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 16px 48px var(--shadow), 0 4px 12px var(--shadow);
}

.say-hi-btn {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 700;
  font-size: 1.25rem;
  background: linear-gradient(135deg, #ff6b6b, #feca57, #48dbfb);
  background-size: 200% 200%;
  animation: btnGradient 3s ease infinite;
  color: #2d1b4e;
  border: none;
  padding: 1rem 2.5rem;
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
  position: relative;
  overflow: hidden;
}

@keyframes btnGradient {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.say-hi-btn:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 8px 25px rgba(255, 107, 107, 0.5);
}

.say-hi-btn:active {
  transform: translateY(0) scale(0.98);
}

.mood-btn {
  font-size: 2rem;
  background: var(--card-bg);
  border: 2px solid transparent;
  border-radius: 16px;
  padding: 0.75rem;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  min-width: 60px;
  min-height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mood-btn:hover {
  transform: scale(1.2) rotate(5deg);
  border-color: var(--accent);
  box-shadow: 0 4px 20px var(--shadow);
}

.mood-btn.active {
  transform: scale(1.15);
  border-color: var(--accent);
  box-shadow: 0 0 20px rgba(255, 107, 107, 0.4);
  background: linear-gradient(135deg, rgba(255,107,107,0.15), rgba(254,202,87,0.15));
}

.confetti-piece {
  position: fixed;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  animation: confettiFall 3s ease-out forwards;
  pointer-events: none;
  z-index: 1000;
}

@keyframes confettiFall {
  0% {
    opacity: 1;
    transform: translateY(0) rotate(0deg) scale(1);
  }
  100% {
    opacity: 0;
    transform: translateY(100vh) rotate(720deg) scale(0.5);
  }
}

.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }

.dark-toggle {
  position: fixed;
  top: 1rem;
  right: 1rem;
  background: var(--card-bg);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50%;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.5rem;
  transition: all 0.3s ease;
  z-index: 100;
  box-shadow: 0 2px 10px var(--shadow);
}

.dark-toggle:hover {
  transform: rotate(20deg) scale(1.1);
}

.fun-fact-card {
  background: var(--card-bg);
  backdrop-filter: blur(20px);
  border-radius: 20px;
  padding: 1.5rem;
  border: 1px solid rgba(255,255,255,0.15);
  box-shadow: 0 4px 20px var(--shadow);
}

.visitor-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, rgba(255,107,107,0.2), rgba(254,202,87,0.2));
  backdrop-filter: blur(10px);
  border-radius: 100px;
  padding: 0.5rem 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  border: 1px solid rgba(255,255,255,0.2);
}

.typewriter {
  border-right: 3px solid var(--accent);
  animation: blink 0.8s step-end infinite;
}

@keyframes blink {
  50% { border-color: transparent; }
}

.mood-cool { --bg-1: #667eea; --bg-2: #764ba2; --bg-3: #48dbfb; --bg-4: #a1c4fd; }
.mood-happy { --bg-1: #ffecd2; --bg-2: #fcb69f; --bg-3: #feca57; --bg-4: #ff6b6b; }
.mood-sleepy { --bg-1: #2c3e50; --bg-2: #3d566e; --bg-3: #4a6fa5; --bg-4: #1a1a2e; }
.mood-excited { --bg-1: #f093fb; --bg-2: #f5576c; --bg-3: #feca57; --bg-4: #4facfe; }
.mood-tired { --bg-1: #dfe6e9; --bg-2: #b2bec3; --bg-3: #636e72; --bg-4: #a29bfe; }
.mood-melting { --bg-1: #fd79a8; --bg-2: #fdcb6e; --bg-3: #6c5ce7; --bg-4: #00cec9; }
.mood-angry { --bg-1: #e74c3c; --bg-2: #c0392b; --bg-3: #e55039; --bg-4: #b71540; }

.dark-mode .mood-cool { --bg-1: #1a1a3e; --bg-2: #2d1b6e; --bg-3: #0c2d48; --bg-4: #1a3a5c; }
.dark-mode .mood-happy { --bg-1: #3d2b1f; --bg-2: #4a2c2a; --bg-3: #4a3c1a; --bg-4: #4a1a1a; }
.dark-mode .mood-sleepy { --bg-1: #0d1117; --bg-2: #161b22; --bg-3: #1a2332; --bg-4: #0d0d1a; }
.dark-mode .mood-excited { --bg-1: #2d1a3e; --bg-2: #3e1a2a; --bg-3: #3e3a1a; --bg-4: #1a2a3e; }
.dark-mode .mood-tired { --bg-1: #1a1d20; --bg-2: #22262a; --bg-3: #16191c; --bg-4: #1a1a2e; }
.dark-mode .mood-melting { --bg-1: #2d1a28; --bg-2: #2d2a1a; --bg-3: #1a1a3e; --bg-4: #0a2d2b; }
.dark-mode .mood-angry { --bg-1: #3e0a0a; --bg-2: #2d0a0a; --bg-3: #3e1010; --bg-4: #2d0515; }

.generated-card-enter {
  animation: cardPop 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes cardPop {
  0% { opacity: 0; transform: scale(0.5) rotate(-3deg); }
  60% { transform: scale(1.05) rotate(1deg); }
  100% { opacity: 1; transform: scale(1) rotate(0deg); }
}

.pulse-glow {
  animation: pulseGlow 2s ease-in-out infinite;
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 5px rgba(255,107,107,0.3); }
  50% { box-shadow: 0 0 25px rgba(255,107,107,0.6); }
}

@media (max-width: 640px) {
  .mood-btn {
    min-width: 50px;
    min-height: 50px;
    font-size: 1.5rem;
    padding: 0.5rem;
  }
}