/* ==============================
   CHATBOT STYLES (Enhanced & Responsive)
   ============================== */

:root {
  /* Color Palette */
  --color-primary:    #227c9d;
  --color-accent:     #5dbbb0;
  --color-dark:       #0d3c55;
  --color-light:      #ffffff;
  --color-bg:         #f9f9f9;
  --color-text:       #222222;

  /* Typography */
  --font-base:        1rem;
  --font-lg:          clamp(1.5rem, 4vw, 2.5rem);
  --font-md:          clamp(1.125rem, 3vw, 2rem);
  --font-sm:          clamp(0.875rem, 2.5vw, 1.25rem);
  --line-height:      1.5;

  /* Spacing */
  --space-xs:         0.5rem;
  --space-sm:         1rem;
  --space-md:         2rem;
  --space-lg:         4rem;

  /* Transitions */
  --trans-fast:       0.3s ease;
  --trans-med:        0.5s ease;

  /* Chat dimensions */
  --chat-toggle-size: 3.5rem;
  --chat-width:       26.25rem;
  --chat-max-height:  50rem;
}

/* --------------------------------
   TOGGLE BUTTON
   -------------------------------- */
#chat-toggle-btn {
  position: fixed;
  bottom: var(--space-sm);
  right: var(--space-sm);
  width: var(--chat-toggle-size);
  height: var(--chat-toggle-size);
  border-radius: 50%;
  background-color: var(--color-accent);
  color: var(--color-light);
  font-size: 1.5rem;
  border: none;
  cursor: pointer;
  box-shadow: 0 0.25rem 0.75rem rgba(0,0,0,0.2);
  transition: background-color var(--trans-fast), transform var(--trans-fast), box-shadow var(--trans-fast);
}
#chat-toggle-btn:hover {
  background-color: var(--color-primary);
  transform: scale(1.1);
  box-shadow: 0 0.75rem 1.5rem rgba(0,0,0,0.2);
}

/* --------------------------------
   CHATBOX CONTAINER
   -------------------------------- */
.chatbox {
  position: fixed;
  bottom: calc(var(--chat-toggle-size) + var(--space-sm) * 2);
  right: var(--space-sm);
  width: var(--chat-width);
  max-height: var(--chat-max-height);
  height: 80vh;
  background: var(--color-light);
  border-radius: 1.125rem;
  box-shadow: 0 0.625rem 1.875rem rgba(0,0,0,0.25);
  visibility: hidden;
  opacity: 0;
  transform: translateY(1rem) scale(0.9);
  transition: visibility 0s linear 0.3s, opacity var(--trans-med), transform var(--trans-med);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 1000;
}
.chatbox.show {
  visibility: visible;
  opacity: 1;
  transform: translateY(0) scale(1);
  transition-delay: 0s;
}

/* --------------------------------
   HEADER
   -------------------------------- */
.chat-header {
  background-color: var(--color-dark);
  color: var(--color-light);
  padding: var(--space-md);
  text-align: left;
  position: relative;
  animation: fadeInDown var(--trans-med) ease forwards;
}
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-1rem); }
  to   { opacity: 1; transform: translateY(0); }
}
.chat-header .logo {
  display: inline-flex;
  align-items: center;
  font-size: 1.25rem;
  font-weight: bold;
  margin-bottom: var(--space-xs);
}
.company-logo {
  width: 1.75rem;
  height: 1.75rem;
  margin-right: var(--space-xs);
}
.chat-header h2 { font-size: var(--font-md); margin: 0 0 var(--space-xs); }
.chat-header p  { font-size: var(--font-base); opacity: 0.85; margin: 0; }
#chat-close-btn {
  position: absolute;
  top: var(--space-sm);
  right: var(--space-sm);
  background: none;
  border: none;
  color: var(--color-light);
  font-size: 1.5rem;
  cursor: pointer;
}

/* --------------------------------
   TABS & BODY
   -------------------------------- */
.tab-content {
  display: none;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  animation: fadeIn var(--trans-fast) forwards;
}
.tab-content.active { display: flex; }
.chat-body {
  flex: 1;
  padding: var(--space-md);
  background-color: #f8f9fa;
  overflow-y: auto;
}

/* --------------------------------
   QUICK ACTIONS
   -------------------------------- */
.quick-action {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-light);
  border-radius: 0.75rem;
  box-shadow: 0 0.25rem 0.75rem rgba(0,0,0,0.1);
  padding: var(--space-sm);
  margin-top: var(--space-md);
  cursor: pointer;
  transition: transform var(--trans-fast), box-shadow var(--trans-fast);
}
.quick-action:hover {
  transform: translateY(-0.125rem);
  box-shadow: 0 0.375rem 1rem rgba(0,0,0,0.15);
}
.qa-text strong { display: block; font-size: var(--font-base); color: var(--color-text); }
.qa-text span  { display: block; font-size: 0.75rem; color: #4b5563; }
.qa-icon {
  width: 2.5rem;
  height: 2.5rem;
  background: #f8f9fa;
  border: none;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  transition: background var(--trans-fast), transform var(--trans-fast);
}
.qa-icon:hover { background: #e2e8f0; transform: scale(1.05); }

/* --------------------------------
   MESSAGES & INPUT
   -------------------------------- */
.message {
  max-width: 80%;
  padding: var(--space-sm) var(--space-md);
  border-radius: 0.875rem;
  margin-bottom: var(--space-sm);
  font-size: var(--font-base);
  line-height: var(--line-height);
  box-shadow: 0 0.125rem 0.375rem rgba(0,0,0,0.06);
  animation: fadeInUp var(--trans-fast) ease;
}
.message.user { background-color: #d8ecff; align-self: flex-end; }
.timestamp {
  display: block;
  font-size: 0.625rem;
  color: #888;
  margin-top: var(--space-xs);
  text-align: right;
  opacity: 0.7;
}

/* --------------------------------
   CHAT INPUT
   -------------------------------- */
.chat-input {
  display: flex;
  align-items: center;
  padding: var(--space-sm) var(--space-md);
  border-top: 1px solid #eeeeee;
  background: var(--color-light);
}
.chat-input input {
  flex: 1;
  padding: var(--space-xs) var(--space-md);
  border: 1px solid #ccc;
  border-radius: 1.5rem;
  font-size: var(--font-base);
  outline: none;
  transition: border-color var(--trans-fast);
}
.chat-input input:focus { border-color: #3b82f6; }
.chat-input button {
  margin-left: var(--space-sm);
  width: 2.5rem;
  height: 2.5rem;
  border: none;
  border-radius: 50%;
  background: #3b82f6;
  color: #fff;
  font-size: 1.125rem;
  cursor: pointer;
  transition: background var(--trans-fast), transform var(--trans-fast);
}
.chat-input button:hover { background: #2563eb; transform: scale(1.05); }
#send-btn.loading::after {
  content: "";
  display: inline-block;
  width: 1em;
  height: 1em;
  border: 2px solid #fff;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-left: var(--space-xs);
}

/* --------------------------------
   TAB NAVIGATION
   -------------------------------- */
.chat-tabs {
  display: flex;
  background: var(--color-light);
  border-top: 1px solid #eee;
}
.tab-btn {
  flex: 1;
  padding: var(--space-xs) 0;
  font-size: 0.75rem;
  color: #4b5563;
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--trans-fast);
}
.tab-btn.active { color: #3b82f6; }

/* --------------------------------
   LOGIN BUTTONS
   -------------------------------- */
.btn-login {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-light);
  border-radius: 0.75rem;
  box-shadow: 0 0.25rem 0.75rem rgba(0,0,0,0.1);
  text-decoration: none;
  color: var(--color-text);
  font-size: var(--font-base);
  margin-bottom: var(--space-sm);
  transition: transform var(--trans-fast), box-shadow var(--trans-fast);
}
.btn-login:hover { transform: translateY(-0.125rem); box-shadow: 0 0.375rem 1rem rgba(0,0,0,0.15); }

/* --------------------------------
   KEYFRAME ANIMATIONS
   -------------------------------- */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(1rem); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes spin { to { transform: rotate(360deg); } }

/* --------------------------------
   RESPONSIVE
   -------------------------------- */
@media (max-width: 40em) {
  .chatbox { width: calc(100vw - 2rem); right: var(--space-sm); }
  #chat-toggle-btn { bottom: calc(var(--chat-width) * -0.04); }
}