:root {
  --background-start: #a8d5e5;
  --background-end: #e2eafc;
  --foreground: #34495e;
  --accent: #ff8a80; /* A soft, playful coral */
  --accent-hover: #ffab91;
  --card-background: rgba(255, 255, 255, 0.7);
  --border-color: rgba(255, 255, 255, 0.9);
  --shadow-color: rgba(0, 0, 0, 0.05);
  --border-radius: 16px;
  --font-family: 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
  background: linear-gradient(135deg, var(--background-start), var(--background-end));
  color: var(--foreground);
  font-family: var(--font-family);
  line-height: 1.6;
  overflow: hidden;
  height: 100vh;
}

/* --- Screen Management --- */
.screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.6s ease-in-out, visibility 0.6s ease-in-out;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1rem;
}

.screen.visible {
  opacity: 1;
  visibility: visible;
}

.screen.hidden {
  opacity: 0;
  visibility: hidden;
}

/* --- Start Screen --- */
#screen-start {
  flex-direction: column;
  text-align: center;
}

.start-content-container {
  position: relative;
  z-index: 10;
  background: var(--card-background);
  backdrop-filter: blur(8px);
  padding: 2.5rem 3rem;
  border-radius: var(--border-radius);
  box-shadow: 0 8px 32px 0 var(--shadow-color);
  border: 1px solid var(--border-color);
}

#persona-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.floating-persona {
    position: absolute;
    width: 200px; /* Increased from 120px to make them much larger */
    height: 200px;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: transform 0.2s linear;
    filter: drop-shadow(0 8px 12px rgba(0,0,0,0.15));
    opacity: 0.8; /* Slightly transparent so they don't overwhelm the content */
}

.floating-persona img {
  width: 100%;
  height: 100%;
  object-fit: contain; /* Ensures SVGs scale properly */
  pointer-events: none;
}

.floating-persona:hover {
  opacity: 1;
  filter: drop-shadow(0 12px 20px rgba(0,0,0,0.2));
  transform: scale(1.05);
}

.title-main {
  font-size: 3.5rem;
  color: var(--foreground);
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.subtitle {
  font-size: 1.2rem;
  color: var(--foreground);
  opacity: 0.8;
  margin-bottom: 2rem;
}

.cta-button {
  background: var(--accent);
  color: white;
  border: none;
  padding: 1rem 2.5rem;
  border-radius: 50px; /* Pill shape */
  font-size: 1.1rem;
  cursor: pointer;
  font-weight: 700;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(255, 138, 128, 0.4);
}

.cta-button:hover {
  background: var(--accent-hover);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(255, 138, 128, 0.5);
}

/* --- Instructions Screen --- */
.instructions-content {
  max-width: 650px;
  background: var(--card-background);
  padding: 3rem;
  border-radius: var(--border-radius);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 32px 0 var(--shadow-color);
  animation: fadeIn 0.8s ease-out forwards;
}

.instructions-content h2 {
  color: var(--accent);
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.instructions-content ul {
  list-style: none;
  padding-left: 0;
  margin-bottom: 2rem;
}

.instructions-content li {
  padding-left: 2rem;
  position: relative;
  margin-bottom: 1rem;
}

.instructions-content li::before {
  content: '🌱'; /* Cute leaf bullet point */
  position: absolute;
  left: 0;
  font-size: 1.2rem;
  top: -2px;
}

/* --- Dashboard Screen & Main Container --- */
.main-container {
  display: flex;
  width: 100%;
  height: 100%;
  max-height: 100vh;
  padding: 1rem;
  gap: 1rem;
}

.panel {
  background: var(--card-background);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  max-height: 100%;
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 32px 0 var(--shadow-color);
}

.panel-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}
.panel-header h2 { color: var(--accent); font-weight: 800; margin-bottom: 0.25rem; }
.panel-header p { font-size: 0.9rem; color: var(--foreground); opacity: 0.8;}

.personality-selector-container {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1rem;
  padding: 1.5rem; border-bottom: 1px solid var(--border-color);
}
.personality-selector {
  background: rgba(255,255,255,0.4);
  border: 2px solid transparent;
  border-radius: var(--border-radius); padding: 1rem; cursor: pointer;
  transition: all 0.2s ease;
}
.personality-selector:hover { transform: translateY(-3px); box-shadow: 0 4px 10px var(--shadow-color); }
.personality-selector.active {
  border-color: var(--accent); background-color: rgba(255, 138, 128, 0.1);
  box-shadow: 0 4px 15px rgba(255, 138, 128, 0.2);
}
.personality-selector h3 { color: var(--foreground); font-size: 1rem; font-weight: 700; margin-bottom: 0.25rem; }
.personality-selector p { font-size: 0.85rem; color: var(--foreground); opacity: 0.7; line-height: 1.4; }

.system-prompt-textarea {
  flex-grow: 1; background: rgba(255,255,255,0.2); border: none; padding: 1.5rem;
  color: var(--foreground); font-family: var(--font-family);
  font-size: 1rem; line-height: 1.7; resize: none; outline: none;
}

.chat-log {
  flex-grow: 1; padding: 1.5rem; overflow-y: auto; display: flex;
  flex-direction: column; gap: 1rem;
}
.message { display: flex; max-width: 85%; }
.message-text {
  padding: 0.75rem 1.25rem; border-radius: var(--border-radius);
  line-height: 1.5;
  box-shadow: 0 2px 5px var(--shadow-color);
}
.message--user { align-self: flex-end; }
.message--user .message-text {
  background: var(--accent); color: white; border-bottom-right-radius: 4px;
}
.message--ai { align-self: flex-start; }
.message--ai .message-text {
  background: #ffffff; color: var(--foreground); border-bottom-left-radius: 4px;
}
.message--thinking { align-self: flex-start; }
.message--thinking .message-text {
  background: transparent; color: var(--foreground); opacity: 0.7; font-style: italic;
  display: flex; align-items: center; gap: 0.75rem; box-shadow: none;
}
.chat-form {
  display: flex; padding: 1rem; border-top: 1px solid var(--border-color); gap: 1rem;
  align-items: center;
}
#user-prompt-input {
  flex-grow: 1; padding: 0.75rem 1.25rem; border-radius: 50px;
  border: 1px solid var(--border-color); background: #ffffff;
  color: var(--foreground); font-size: 1rem; outline: none; transition: all 0.2s ease;
}
#user-prompt-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(255, 138, 128, 0.3); }

.chat-form button {
  background: var(--accent); color: white; border: none;
  width: 50px; height: 50px;
  border-radius: 50%;
  font-size: 1.5rem; cursor: pointer; font-weight: 600;
  transition: all 0.2s ease;
  display: flex; align-items: center; justify-content: center;
  padding-bottom: 2px;
}
.chat-form button::before {
  content: '➤'; /* Send icon */
}
.chat-form button:hover { background: var(--accent-hover); transform: scale(1.1); }
.chat-form button:disabled { background: #ccc; cursor: not-allowed; transform: scale(1); }

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

.spinner {
  width: 18px; height: 18px; border: 2px solid rgba(0,0,0,0.1);
  border-top-color: var(--accent); border-radius: 50%; animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }