/* ================================
   Base Styles & Layout
   ================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 50%, #ffd1dc 100%);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: #ffffff;
}

/* ================================
   Main Card
   ================================ */

.card {
  width: min(680px, 100%);
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: clamp(24px, 5vw, 36px);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 
    0 8px 32px rgba(31, 38, 135, 0.15),
    0 2px 8px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: stretch;
  animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) both;
}

/* ================================
   Typography
   ================================ */

.question {
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin: 0;
  text-align: center;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  letter-spacing: -0.02em;
}

.editor-label {
  font-size: 0.95rem;
  font-weight: 600;
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.95);
  letter-spacing: 0.01em;
}

/* ================================
   Frog Image
   ================================ */

.frog-wrap {
  display: flex;
  justify-content: center;
  margin: 12px 0;
}

.frog {
  width: min(320px, 70vw);
  height: auto;
  border-radius: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  transition: transform 280ms cubic-bezier(0.34, 1.56, 0.64, 1),
              box-shadow 280ms ease;
}

.frog:hover {
  transform: translateY(-8px) scale(1.03);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.2);
}

/* ================================
   Code Editor
   ================================ */

#editor {
  min-height: 80px;
  max-height: 200px;
  resize: vertical;
  padding: 14px 16px;
  border-radius: 10px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, "Courier New", monospace;
  font-size: 0.95rem;
  line-height: 1.5;
  color: #1a202c;
  background: #ffffff;
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

#editor:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.6);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
}

#editor::placeholder {
  color: #a0aec0;
}

/* ================================
   Controls (Buttons)
   ================================ */

.controls {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 4px;
}

.controls button {
  background: #ffffff;
  color: #2d3748;
  border: none;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 200ms ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.controls button:hover {
  background: #f7fafc;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.controls button:active {
  transform: translateY(0);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.controls button:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.4);
}

/* ================================
   Result Display
   ================================ */

.result {
  margin-top: 12px;
}

.result-card {
  padding: 24px;
  border-radius: 12px;
  background: linear-gradient(135deg, #ffb3c6 0%, #ff8fb8 100%);
  color: #1a202c;
  text-align: center;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.result-card h2 {
  margin: 0 0 16px 0;
  font-size: 1.75rem;
  font-weight: 700;
}

.heart-emoji {
  margin-left: 8px;
  font-size: 1.5rem;
  display: inline-block;
  animation: heartPop 1s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.itinerary {
  margin: 16px 0;
  background: rgba(255, 255, 255, 0.5);
  padding: 16px;
  border-radius: 8px;
  text-align: left;
}

.itinerary strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.1rem;
}

.itinerary ul {
  margin: 0;
  padding-left: 20px;
  list-style: none;
}

.itinerary li {
  margin: 8px 0;
  padding-left: 4px;
}

.itinerary li::before {
  content: "•";
  margin-right: 8px;
  color: #fc8eac;
  font-weight: bold;
}

.ps {
  margin-top: 16px;
  font-size: 0.95rem;
  color: #2d3748;
  line-height: 1.6;
}

#days-since {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, monospace;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.95);
  padding: 4px 10px;
  border-radius: 6px;
  color: #2d3748;
  white-space: nowrap;
}

.forever {
  margin-top: 12px;
  font-weight: 700;
  color: #2d3748;
  font-size: 1.05rem;
}

.output {
  background: #ffffff;
  color: #2d3748;
  padding: 16px;
  border-radius: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, monospace;
  font-size: 0.9rem;
  line-height: 1.5;
  white-space: pre-wrap;
  word-wrap: break-word;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* ================================
   Celebration Animation
   ================================ */

.celebrate {
  position: relative;
  pointer-events: none;
  height: 0;
  overflow: visible;
}

.confetti,
.heart-piece {
  position: absolute;
  top: 0;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  will-change: transform, opacity;
}

.heart-piece {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  background: transparent;
}

.heart-piece::after {
  content: '💖';
  display: block;
  transform: scale(0.95);
}

.confetti.fly {
  animation: confetti-fall 3s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.heart-piece.fly {
  animation: heart-rise 3s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

/* ================================
   Keyframe Animations
   ================================ */

@keyframes fadeInUp {
  0% {
    opacity: 0;
    transform: translateY(30px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes heartPop {
  0% {
    transform: scale(0.5);
    opacity: 0;
  }
  60% {
    transform: scale(1.2);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes confetti-fall {
  0% {
    opacity: 1;
    transform: translateY(0) rotate(0deg) scale(1);
  }
  100% {
    opacity: 0;
    transform: translateY(240px) rotate(400deg) scale(0.8);
  }
}

@keyframes heart-rise {
  0% {
    opacity: 0;
    transform: translateY(0) scale(0.6);
  }
  25% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translateY(-200px) scale(1.1);
  }
}

/* ================================
   Responsive Design
   ================================ */

@media (max-width: 640px) {
  .card {
    padding: 20px;
    gap: 12px;
  }

  .controls {
    flex-direction: column;
  }

  .controls button {
    width: 100%;
  }

  .result-card h2 {
    font-size: 1.5rem;
  }

  .itinerary {
    padding: 12px;
  }
}