/* ecoSeek Kids — Pastel, clean, kid-friendly */

:root {
  --bg: #FFFFFF;
  --bg-soft: #FFF9F0;
  --surface: #FFFFFF;
  --border: #F0E6D8;
  --text: #3D3D3D;
  --text-light: #8A8A8A;
  --accent: #7EC8A0;
  --accent-hover: #5FB88A;
  --pink: #FFB5C2;
  --blue: #A0D2F0;
  --yellow: #FFE5A0;
  --lavender: #D4B8F0;
  --peach: #FFDAB9;
  --mint: #B8F0D4;
  --shadow: 0 2px 12px rgba(0,0,0,0.06);
  --radius: 16px;
  --radius-sm: 10px;
  --font: 'Nunito', system-ui, -apple-system, sans-serif;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100dvh;
  overflow: hidden;
}

/* ===== LANGUAGE BAR ===== */
.lang-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.home-btn {
  background: none;
  border: 2px solid var(--accent);
  border-radius: 50px;
  padding: 0.4rem 0.8rem;
  font-size: 1.6rem;
  cursor: pointer;
  transition: all 0.2s ease;
  line-height: 1;
}

.home-btn:hover {
  transform: scale(1.15);
  background: #F0FFF4;
  border-color: var(--accent-hover);
}

.lang-buttons {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.lang-btn {
  background: none;
  border: 2px solid transparent;
  border-radius: 50px;
  padding: 0.3rem 0.6rem;
  font-size: 0.85rem;
  font-weight: 700;
  font-family: var(--font);
  color: var(--text-light);
  cursor: pointer;
  transition: all 0.2s ease;
  line-height: 1;
  letter-spacing: 0.02em;
}

.lang-btn:hover {
  transform: scale(1.1);
  background: var(--bg-soft);
  color: var(--text);
}

.lang-btn.active {
  border-color: var(--accent);
  background: #F0FFF4;
  color: var(--accent-hover);
  transform: scale(1.05);
}

/* ===== SCREENS ===== */
.screen { display: none; height: 100dvh; }
.screen.active { display: flex; }

/* ===== WELCOME SCREEN ===== */
#welcome-screen {
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #FFF9F0 0%, #F0F8FF 50%, #FFF0F5 100%);
  padding-top: 50px; /* space for lang bar */
}

.welcome-container {
  text-align: center;
  max-width: 600px;
  padding: 2rem;
  width: 100%;
}

.logo-svg {
  width: 200px;
  height: auto;
  margin-bottom: 0.5rem;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.subtitle {
  color: var(--text-light);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 2rem;
}

/* Topic Cards */
.welcome-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8rem;
  margin-bottom: 2rem;
}

.topic-card {
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem 0.8rem;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font);
  box-shadow: var(--shadow);
}

.topic-card:nth-child(1) { border-color: var(--blue); }
.topic-card:nth-child(2) { border-color: var(--mint); }
.topic-card:nth-child(3) { border-color: var(--yellow); }
.topic-card:nth-child(4) { border-color: var(--peach); }
.topic-card:nth-child(5) { border-color: var(--lavender); }
.topic-card:nth-child(6) { border-color: var(--pink); }

.topic-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.08);
}

.topic-card:nth-child(1):hover { background: #F0F8FF; }
.topic-card:nth-child(2):hover { background: #F0FFF8; }
.topic-card:nth-child(3):hover { background: #FFFEF0; }
.topic-card:nth-child(4):hover { background: #FFF8F0; }
.topic-card:nth-child(5):hover { background: #F8F0FF; }
.topic-card:nth-child(6):hover { background: #FFF0F5; }

.topic-icon {
  width: 80px;
  height: 80px;
  object-fit: contain;
  border-radius: 12px;
}
.topic-label { font-size: 0.85rem; font-weight: 700; color: var(--text); }

/* Start Input */
.start-chat {
  display: flex;
  gap: 0.6rem;
  background: var(--surface);
  border: 2px solid var(--border);
  border-radius: 50px;
  padding: 0.5rem 0.5rem 0.5rem 1.2rem;
  box-shadow: var(--shadow);
  transition: border-color 0.2s;
}

.start-chat:focus-within {
  border-color: var(--accent);
}

#start-input {
  flex: 1;
  border: none;
  outline: none;
  font-family: var(--font);
  font-size: 1rem;
  background: transparent;
  color: var(--text);
}

#start-input::placeholder { color: #C0C0C0; }

#start-btn {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 50px;
  padding: 0.7rem 1.4rem;
  font-family: var(--font);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
}

#start-btn:hover { background: var(--accent-hover); }

/* ===== CHAT SCREEN ===== */
#chat-screen {
  flex-direction: column;
  height: 100dvh;
}

.chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

.header-center {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.header-logo { font-size: 1.4rem; }
.header-logo-img { width: 28px; height: 28px; }
.header-title { font-weight: 800; font-size: 1.1rem; }

.icon-btn {
  background: none;
  border: 2px solid var(--border);
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.1rem;
  color: var(--text);
  transition: all 0.2s;
}

.icon-btn:hover {
  background: var(--bg-soft);
  border-color: var(--accent);
}

/* Messages */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  scroll-behavior: smooth;
}

.message {
  max-width: 85%;
  animation: msgIn 0.3s ease;
}

@keyframes msgIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.message.user {
  align-self: flex-end;
}

.message.assistant {
  align-self: flex-start;
}

.msg-bubble {
  padding: 0.9rem 1.1rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  line-height: 1.6;
  word-wrap: break-word;
}

.message.user .msg-bubble {
  background: var(--accent);
  color: white;
  border-bottom-right-radius: 4px;
  font-weight: 600;
}

.message.assistant .msg-bubble {
  background: var(--bg-soft);
  color: var(--text);
  border-bottom-left-radius: 4px;
  border: 1px solid var(--border);
}

/* Emily avatar row in messages */
.message.assistant .msg-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

/* Markdown-ish styling inside assistant messages */
.msg-bubble h1, .msg-bubble h2, .msg-bubble h3 {
  font-weight: 800;
  margin: 0.6rem 0 0.3rem;
}

.msg-bubble h1 { font-size: 1.2rem; }
.msg-bubble h2 { font-size: 1.1rem; }
.msg-bubble h3 { font-size: 1rem; }

.msg-bubble ul, .msg-bubble ol {
  margin: 0.4rem 0;
  padding-left: 1.4rem;
}

.msg-bubble li { margin-bottom: 0.2rem; }

.msg-bubble code {
  background: #F0E6D8;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.88rem;
}

.msg-bubble pre {
  background: #2D2D2D;
  color: #F8F8F2;
  padding: 0.8rem;
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: 0.5rem 0;
  font-size: 0.85rem;
}

.msg-bubble pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.msg-bubble strong { font-weight: 800; }

.msg-bubble blockquote {
  border-left: 3px solid var(--accent);
  padding-left: 0.8rem;
  margin: 0.5rem 0;
  color: var(--text-light);
  font-style: italic;
}

/* Follow-up option buttons */
.followup-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.5rem 0.8rem;
  margin-bottom: 0.5rem;
}

.followup-btn {
  background: var(--surface);
  border: 2px solid var(--accent);
  border-radius: 20px;
  padding: 0.5rem 1rem;
  font-family: var(--font);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-hover);
  cursor: pointer;
  transition: all 0.2s ease;
  line-height: 1.3;
}

.followup-btn:hover {
  background: var(--accent);
  color: white;
  transform: scale(1.03);
}

.followup-btn:active {
  transform: scale(0.97);
}

/* Typing indicator */
.typing-indicator {
  display: flex;
  gap: 4px;
  padding: 0.9rem 1.1rem;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  border-bottom-left-radius: 4px;
  width: fit-content;
}

.typing-dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: typingBounce 1.2s ease infinite;
}

.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-6px); opacity: 1; }
}

/* Input Area */
.chat-input-area {
  padding: 0.8rem 1rem;
  background: var(--surface);
  border-top: 1px solid var(--border);
  flex-shrink: 0;
}

.input-wrapper {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  background: var(--bg-soft);
  border: 2px solid var(--border);
  border-radius: 20px;
  padding: 0.4rem 0.4rem 0.4rem 1rem;
  transition: border-color 0.2s;
}

.input-wrapper:focus-within {
  border-color: var(--accent);
}

#chat-input {
  flex: 1;
  border: none;
  outline: none;
  font-family: var(--font);
  font-size: 0.95rem;
  background: transparent;
  resize: none;
  max-height: 120px;
  line-height: 1.5;
  padding: 0.3rem 0;
  color: var(--text);
}

#chat-input::placeholder { color: #C0C0C0; }

#send-btn {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.2s;
  flex-shrink: 0;
}

#send-btn:hover { background: var(--accent-hover); }
#send-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.input-hint {
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-light);
  margin-top: 0.4rem;
}

/* Data Panel (GBIF/References) */
.data-panel {
  margin-top: 0.6rem;
  background: linear-gradient(135deg, #F0FFF4 0%, #E6FFED 100%);
  border: 1.5px solid #9AE6B4;
  border-left: 4px solid #38A169;
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.9rem;
  font-size: 0.82rem;
  box-shadow: 0 1px 4px rgba(56, 161, 105, 0.1);
  animation: dataSlideIn 0.4s ease-out;
}

@keyframes dataSlideIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.data-panel-header {
  font-weight: 700;
  color: #22543D;
  margin-bottom: 0.25rem;
  font-size: 0.85rem;
}

.data-panel-body {
  color: #2D3748;
  line-height: 1.5;
}

/* ===== SCROLLBAR ===== */
.chat-messages::-webkit-scrollbar { width: 6px; }
.chat-messages::-webkit-scrollbar-track { background: transparent; }
.chat-messages::-webkit-scrollbar-thumb { background: #DDD; border-radius: 3px; }

/* ===== VIEW TOGGLE BUTTON ===== */
.view-toggle {
  background: none;
  border: 2px solid var(--lavender);
  border-radius: 50px;
  padding: 0.3rem 0.6rem;
  font-size: 1.2rem;
  cursor: pointer;
  transition: all 0.2s ease;
  line-height: 1;
}

.view-toggle:hover {
  transform: scale(1.15);
  background: #F8F0FF;
  border-color: #B39DDB;
}

/* ===== RESPONSIVE: Auto-detect media queries ===== */
@media (max-width: 600px) {
  .welcome-cards { grid-template-columns: repeat(2, 1fr); }
  .welcome-container h1 { font-size: 1.8rem; }
  .logo-big { font-size: 3rem; }
  .message { max-width: 92%; }
}

@media (max-width: 400px) {
  .welcome-cards { grid-template-columns: repeat(2, 1fr); gap: 0.5rem; }
  .topic-card { padding: 0.8rem 0.5rem; }
}

/* ===== RESPONSIVE: Mode-based overrides (toggle) ===== */

/* Mobile mode (forced or auto-detected) */
body.mode-mobile .lang-bar {
  padding: 0.3rem 0.5rem;
  gap: 0.3rem;
}
body.mode-mobile .lang-btn {
  padding: 0.25rem 0.45rem;
  font-size: 0.75rem;
}
body.mode-mobile .home-btn {
  font-size: 1.3rem;
  padding: 0.3rem 0.6rem;
}
body.mode-mobile .welcome-cards {
  grid-template-columns: repeat(2, 1fr);
  gap: 0.6rem;
}
body.mode-mobile .topic-icon {
  width: 56px;
  height: 56px;
}
body.mode-mobile .topic-label {
  font-size: 0.75rem;
}
body.mode-mobile .topic-card {
  padding: 0.8rem 0.5rem;
}
body.mode-mobile .logo-svg {
  width: 140px;
}
body.mode-mobile .subtitle {
  font-size: 0.9rem;
  margin-bottom: 1.2rem;
}
body.mode-mobile .welcome-container {
  padding: 1rem;
}
body.mode-mobile #welcome-screen {
  padding-top: 42px;
}
body.mode-mobile .message {
  max-width: 92%;
}
body.mode-mobile .msg-bubble {
  padding: 0.7rem 0.9rem;
  font-size: 0.9rem;
}
body.mode-mobile .followup-btn {
  padding: 0.6rem 0.9rem;
  font-size: 0.8rem;
}
body.mode-mobile .chat-input-area {
  padding: 0.5rem 0.6rem;
}
body.mode-mobile .input-hint {
  font-size: 0.7rem;
}

/* Desktop mode (forced) — ensure full-width experience */
body.mode-desktop .welcome-cards {
  grid-template-columns: repeat(3, 1fr);
}
body.mode-desktop .welcome-container {
  max-width: 700px;
}
body.mode-desktop .topic-icon {
  width: 80px;
  height: 80px;
}
body.mode-desktop .logo-svg {
  width: 200px;
}
body.mode-desktop .message {
  max-width: 75%;
}