/* ── style.css — IvieAI · Clean uniform theme with conversation history ── */

/* ── Google Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800&family=DM+Sans:ital,wght@0,400;0,500;1,400&display=swap');

/* ── Design tokens ── */
:root {
  --blue-dark:    #0d3b6e;
  --blue-mid:     #1a5fa8;
  --blue-light:   #3b8fe8;
  --blue-pale:    #ddeeff;
  --green-dark:   #145c38;
  --green-mid:    #22a06b;
  --green-light:  #4cd4a0;
  --green-pale:   #d4f5e9;
  --white:        #ffffff;
  --off-white:    #f4f8ff;
  --text-dark:    #0d1f35;
  --text-mid:     #2e4a6b;
  --text-muted:   #6b8cae;
  --border:       #c5daf5;
  --shadow-sm:    0 2px 8px rgba(13,59,110,0.08);
  --shadow-md:    0 6px 24px rgba(13,59,110,0.13);
  --shadow-lg:    0 16px 48px rgba(13,59,110,0.16);
  --radius-sm:    8px;
  --radius-md:    14px;
  --radius-lg:    20px;
  --font-body:    'DM Sans', system-ui, sans-serif;
  --font-display: 'Nunito', system-ui, sans-serif;
  --transition:   0.22s ease;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.65;
  color: var(--text-dark);
  background: linear-gradient(145deg, #e8f2ff 0%, #f0fbf5 50%, #e6f4ff 100%);
  min-height: 100vh;
  padding: 20px 16px 40px;
}

/* ── App container ── */
.app-container {
  max-width: 900px;
  margin: 0 auto;
}

/* ── Hero ── */
.hero {
  text-align: center;
  padding: 28px 0 18px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 6vw, 42px);
  font-weight: 800;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--blue-dark) 0%, var(--blue-mid) 45%, var(--green-mid) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 6px;
}

.hero .sub {
  color: var(--text-mid);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
}

/* ── Chat panel ── */
.chat-panel {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

/* ── Export bar ── */
.export-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px 18px;
  background: linear-gradient(90deg, var(--blue-dark) 0%, var(--blue-mid) 100%);
  border-bottom: 1px solid var(--blue-light);
}

.session-info {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.session-badge,
.interaction-badge {
  font-size: 12px;
  font-weight: 600;
  color: var(--blue-pale);
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 20px;
  padding: 3px 10px;
  letter-spacing: 0.02em;
}

.button-group {
  display: flex;
  gap: 7px;
  flex-wrap: wrap;
}

/* ── Buttons ── */
.btn-secondary,
.btn-export {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 600;
  padding: 5px 11px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

.btn-secondary {
  background: rgba(255,255,255,0.15);
  color: var(--white);
  border-color: rgba(255,255,255,0.25);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.28);
  transform: translateY(-1px);
}

.btn-export {
  background: var(--green-mid);
  color: var(--white);
  border-color: var(--green-dark);
}
.btn-export:hover {
  background: var(--green-dark);
  transform: translateY(-1px);
  box-shadow: 0 3px 10px rgba(20,92,56,0.25);
}

/* ── Conversation Container ── */
.conversation-container {
  background: var(--off-white);
  min-height: 400px;
  max-height: 500px;
  overflow-y: auto;
  padding: 20px;
}

.conversation-history {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.empty-conversation {
  text-align: center;
  color: var(--text-muted);
  padding: 60px 20px;
  font-style: italic;
}

/* ── Message Bubbles ── */
.message-bubble {
  display: flex;
  margin-bottom: 16px;
  animation: fadeInUp 0.3s ease-out;
}

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

.message-bubble.user {
  justify-content: flex-end;
}

.message-bubble.ai {
  justify-content: flex-start;
}

.message-content {
  max-width: 75%;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  word-wrap: break-word;
  line-height: 1.6;
}

/* User message - uniform blue theme */
.message-bubble.user .message-content {
  background: linear-gradient(135deg, var(--blue-mid) 0%, var(--blue-light) 100%);
  color: var(--white);
  border-bottom-right-radius: 4px;
}

/* AI message - uniform green/blue theme (consistent color) */
.message-bubble.ai .message-content {
  background: var(--white);
  color: var(--text-dark);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
  box-shadow: var(--shadow-sm);
}

/* Sender label */
.message-sender {
  font-size: 11px;
  font-weight: 700;
  margin-bottom: 5px;
  display: block;
  letter-spacing: 0.5px;
}

.message-bubble.user .message-sender {
  text-align: right;
  color: var(--blue-light);
}

.message-bubble.ai .message-sender {
  color: var(--green-mid);
}

/* Message text */
.message-text {
  font-size: 14px;
  line-height: 1.6;
}

/* Typing indicator */
.typing-indicator {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  border-bottom-left-radius: 4px;
}

.typing-indicator span {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue-mid);
  animation: typingDot 1.4s infinite;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 0.4s;
}

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

/* Streamed sentence container for live responses */
.streaming-container {
  display: inline;
}

.streaming-sentence {
  display: inline;
  animation: sentenceFade 0.3s ease-in;
}

@keyframes sentenceFade {
  from {
    opacity: 0;
    transform: translateX(-5px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ── Input section ── */
.input-section {
  padding: 16px 18px 12px;
  background: var(--white);
  border-top: 1px solid var(--border);
}

.input-group {
  display: flex;
  gap: 10px;
  align-items: flex-end;
}

textarea#userInput {
  flex: 1;
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--text-dark);
  background: var(--off-white);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  padding: 11px 14px;
  resize: none;
  min-height: 46px;
  max-height: 120px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  line-height: 1.5;
}
textarea#userInput::placeholder { color: var(--text-muted); }
textarea#userInput:focus {
  border-color: var(--blue-light);
  box-shadow: 0 0 0 3px rgba(59,143,232,0.15);
}

#sendBtn {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  padding: 11px 22px;
  border: none;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--blue-mid) 0%, var(--green-mid) 100%);
  color: var(--white);
  cursor: pointer;
  flex-shrink: 0;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 3px 12px rgba(26,95,168,0.28);
}
#sendBtn:hover:not(:disabled) {
  opacity: 0.92;
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(26,95,168,0.32);
}
#sendBtn:active:not(:disabled) { transform: translateY(0); }
#sendBtn:disabled {
  background: var(--border);
  color: var(--text-muted);
  box-shadow: none;
  cursor: not-allowed;
}

.input-hint {
  font-size: 11.5px;
  color: var(--text-muted);
  margin-top: 8px;
  text-align: center;
}
.input-hint kbd {
  background: var(--blue-pale);
  color: var(--blue-dark);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 11px;
  font-family: monospace;
}

/* ── Info footer ── */
.info-footer {
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
  padding: 10px 18px 14px;
  border-top: 1px solid var(--border);
  background: var(--off-white);
  line-height: 1.6;
}
.info-footer strong { color: var(--blue-mid); }

.server-status {
  color: var(--green-mid);
  font-weight: 600;
}
.server-status.error { color: #d64040; }

/* ── Modal ── */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(13,31,53,0.55);
  backdrop-filter: blur(4px);
  z-index: 1000;
  justify-content: center;
  align-items: center;
  padding: 20px;
}
.modal.open { display: flex; }

.modal-content {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 560px;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  animation: modalIn 0.25s cubic-bezier(0.34,1.56,0.64,1);
}
@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to   { opacity: 1; transform: scale(1)    translateY(0); }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background: linear-gradient(90deg, var(--blue-dark), var(--blue-mid));
  color: var(--white);
}
.modal-header h2 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
}

.close-modal {
  font-size: 22px;
  cursor: pointer;
  opacity: 0.75;
  line-height: 1;
  transition: opacity var(--transition);
}
.close-modal:hover { opacity: 1; }

.modal-body {
  padding: 16px 20px;
  overflow-y: auto;
  flex: 1;
}

.sessions-list { display: flex; flex-direction: column; gap: 10px; }

.session-item {
  background: var(--off-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.session-item:hover {
  border-color: var(--blue-light);
  box-shadow: var(--shadow-sm);
}

.session-item-info { font-size: 13px; color: var(--text-mid); line-height: 1.5; }
.session-item-info strong { color: var(--blue-dark); display: block; }

.session-item-actions { display: flex; gap: 6px; }

.btn-sm {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}
.btn-sm.btn-view   { background: var(--blue-pale); color: var(--blue-dark); border-color: var(--border); }
.btn-sm.btn-delete { background: #fde8e8; color: #b52b2b; border-color: #f5c2c2; }
.btn-sm:hover { transform: translateY(-1px); }

.loading-message {
  text-align: center;
  color: var(--text-muted);
  font-style: italic;
  padding: 20px;
}

.modal-footer {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
}

/* ── Toast ── */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--blue-dark);
  color: var(--white);
  font-size: 13px;
  font-weight: 600;
  padding: 10px 22px;
  border-radius: 30px;
  box-shadow: var(--shadow-md);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
  z-index: 2000;
  white-space: nowrap;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast.success { background: var(--green-dark); }
.toast.error   { background: #b52b2b; }

/* ── Scrollbar styling ── */
.conversation-container::-webkit-scrollbar {
  width: 8px;
}

.conversation-container::-webkit-scrollbar-track {
  background: var(--off-white);
  border-radius: 10px;
}

.conversation-container::-webkit-scrollbar-thumb {
  background: var(--blue-light);
  border-radius: 10px;
}

.conversation-container::-webkit-scrollbar-thumb:hover {
  background: var(--blue-mid);
}

/* ── Responsive ── */
@media (max-width: 520px) {
  .export-bar { flex-direction: column; align-items: flex-start; }
  .button-group { width: 100%; }
  .btn-secondary, .btn-export { font-size: 11px; padding: 5px 9px; }
  #sendBtn { padding: 11px 14px; }
  .message-content { max-width: 85%; }
}