/* ═══════════════════════════════════════════════════════════════
   RVCN Chatbot — Premium Stylesheet
   Branded to match rvcn.edu.in — Navy Blue (#363959) palette
   ═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ─── CSS Variables ─────────────────────────────────────────── */
:root {
  /* Brand Colors — matching rvcn.edu.in */
  --rvcn-primary: #363959;
  --rvcn-primary-light: #4a4e73;
  --rvcn-primary-dark: #282a45;
  --rvcn-accent: #4e5285;
  --rvcn-glow: rgba(54, 57, 89, 0.3);
  --rvcn-gold: #c9a84c;

  /* Light Professional Theme */
  --bg-dark: #f0f2f7;
  --bg-card: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.95);
  --bg-input: #f5f6fa;
  --bg-message-bot: rgba(54, 57, 89, 0.06);
  --bg-message-user: linear-gradient(135deg, #363959, #4a4e73);
  --bg-button: rgba(54, 57, 89, 0.08);
  --bg-button-hover: rgba(54, 57, 89, 0.16);

  /* Text */
  --text-primary: #1a1c2e;
  --text-secondary: #5c5f7a;
  --text-muted: #8e91a8;
  --text-on-accent: #ffffff;

  /* Borders */
  --border-glass: rgba(54, 57, 89, 0.12);
  --border-active: rgba(54, 57, 89, 0.35);

  /* Sizing */
  --chat-width: 420px;
  --chat-height: 640px;
  --header-height: 72px;
  --input-height: 68px;
  --border-radius: 16px;
  --border-radius-sm: 12px;
  --border-radius-xs: 8px;

  /* Shadows */
  --shadow-lg: 0 25px 60px -12px rgba(54, 57, 89, 0.25), 0 0 40px rgba(54, 57, 89, 0.05);
  --shadow-md: 0 10px 25px -5px rgba(54, 57, 89, 0.15);
  --shadow-glow: 0 0 20px rgba(54, 57, 89, 0.1);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--text-primary);
  position: relative;
}

a {
  color: var(--rvcn-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--rvcn-accent);
  text-decoration: underline;
}



/* ─── Chat Container ────────────────────────────────────────── */
.chat-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: var(--chat-width);
  height: var(--chat-height);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  border-radius: var(--border-radius);
  overflow: hidden;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  box-shadow: var(--shadow-lg);
  transform: scale(0) translateY(50px);
  opacity: 0;
  transition: transform var(--transition-spring), opacity var(--transition-slow);
  transform-origin: bottom right;
}

.chat-container.open {
  transform: scale(1) translateY(0);
  opacity: 1;
}

/* ─── Chat Header ───────────────────────────────────────────── */
.chat-header {
  height: var(--header-height);
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  background: linear-gradient(135deg, #363959, #282a45);
  border-bottom: 1px solid rgba(54, 57, 89, 0.2);
  flex-shrink: 0;
  position: relative;
  overflow: hidden;
}

.chat-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--rvcn-accent), transparent);
  animation: headerGlow 3s ease-in-out infinite;
}

@keyframes headerGlow {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.chat-logo {
  width: 44px;
  height: 44px;
  border-radius: 50% !important;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 0 15px var(--rvcn-glow);
  position: relative;
  padding: 4px;
  overflow: hidden !important;
}

.chat-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 50% !important;
}

.chat-logo::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  border: 2px solid var(--rvcn-accent);
  opacity: 0.3;
  animation: pulse-ring 2s ease-in-out infinite;
}

@keyframes pulse-ring {
  0%, 100% { transform: scale(1); opacity: 0.3; }
  50% { transform: scale(1.1); opacity: 0.1; }
}

.chat-header-info {
  flex: 1;
  min-width: 0;
}

.chat-header-title {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.chat-header-status {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.75);
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: 2px;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #6ee7b7;
  animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

#chatContainer .chat-close-btn,
button.chat-close-btn {
  width: 36px !important;
  height: 36px !important;
  padding: 0 !important;
  border-radius: 50% !important;
  border: 1.5px solid #ffffff !important;
  outline: none !important;
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.9);
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
  font-size: 18px;
}

#chatContainer .chat-close-btn:hover,
button.chat-close-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  border-color: #ffffff !important;
}

#chatContainer .chat-clear-btn,
button.chat-clear-btn {
  width: 36px !important;
  height: 36px !important;
  padding: 0 !important;
  border-radius: 50% !important;
  border: 1.5px solid #ffffff !important;
  outline: none !important;
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.9);
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

#chatContainer .chat-clear-btn svg,
button.chat-clear-btn svg {
  width: 16px;
  height: 16px;
}

#chatContainer .chat-clear-btn:hover,
button.chat-clear-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
  border-color: #ffffff !important;
}

/* ─── Chat Messages Area ────────────────────────────────────── */
.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--rvcn-primary-dark) transparent;
}

.chat-messages::-webkit-scrollbar {
  width: 5px;
}

.chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
  background: var(--rvcn-primary-dark);
  border-radius: 10px;
}

/* ─── Message Bubbles ───────────────────────────────────────── */
.message {
  display: flex;
  gap: 10px;
  max-width: 92%;
  animation: messageSlideIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

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

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

@keyframes messageSlideIn {
  from {
    opacity: 0;
    transform: translateY(15px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.message-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50% !important;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  margin-top: 2px;
  overflow: hidden !important;
}

.message.bot .message-avatar {
  background: #ffffff;
  color: var(--rvcn-primary);
  padding: 2px;
  border: 1px solid var(--border-glass);
  overflow: hidden !important;
  border-radius: 50% !important;
}

.message.bot .message-avatar img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 50% !important;
}

.message.user .message-avatar {
  background: linear-gradient(135deg, var(--rvcn-primary), var(--rvcn-accent));
  color: white;
}

.message-bubble {
  padding: 12px 16px;
  border-radius: var(--border-radius-sm);
  font-size: 13.5px;
  line-height: 1.6;
  word-wrap: break-word;
  position: relative;
}

.message.bot .message-bubble {
  background: var(--bg-message-bot);
  border: 1px solid rgba(54, 57, 89, 0.1);
  border-top-left-radius: 4px;
  color: var(--text-primary);
}

.message.user .message-bubble {
  background: var(--bg-message-user);
  border: none;
  border-top-right-radius: 4px;
  color: var(--text-on-accent);
}

.message-bubble strong {
  color: var(--rvcn-primary);
  font-weight: 600;
}

.message.user .message-bubble strong {
  color: #ffffff;
}

.message-time {
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 4px;
  display: block;
}

.message.user .message-time {
  text-align: right;
  color: var(--text-muted);
}

/* ─── Typing Indicator ─────────────────────────────────────── */
.typing-indicator {
  display: flex;
  gap: 10px;
  align-self: flex-start;
  max-width: 92%;
  animation: messageSlideIn 0.3s ease-out both;
}

.typing-indicator .message-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--rvcn-primary), var(--rvcn-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.typing-dots {
  padding: 14px 20px;
  background: var(--bg-message-bot);
  border: 1px solid rgba(54, 57, 89, 0.1);
  border-radius: var(--border-radius-sm);
  border-top-left-radius: 4px;
  display: flex;
  gap: 5px;
  align-items: center;
}

.typing-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--rvcn-accent);
  animation: typingBounce 1.4s infinite;
}

.typing-dot:nth-child(2) { animation-delay: 0.15s; }
.typing-dot:nth-child(3) { animation-delay: 0.3s; }

@keyframes typingBounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-8px); opacity: 1; }
}

/* ─── Quick Reply Buttons ───────────────────────────────────── */
.buttons-container {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 4px 0 8px 40px;
  animation: messageSlideIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

.quick-btn {
  padding: 9px 16px;
  border-radius: 20px;
  border: 1px solid var(--border-active);
  background: var(--bg-button);
  color: var(--rvcn-primary);
  font-size: 12.5px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-normal);
  font-family: inherit;
  white-space: nowrap;
  backdrop-filter: blur(5px);
}

.quick-btn:hover {
  background: var(--bg-button-hover);
  border-color: var(--rvcn-accent);
  transform: translateY(-1px);
  box-shadow: var(--shadow-glow);
}

.quick-btn:active {
  transform: translateY(0);
}

.quick-btn.back-btn {
  border-color: rgba(148, 163, 184, 0.2);
  color: var(--text-secondary);
  background: rgba(148, 163, 184, 0.08);
}

.quick-btn.back-btn:hover {
  border-color: rgba(148, 163, 184, 0.4);
  color: var(--text-primary);
  background: rgba(148, 163, 184, 0.15);
}

/* ─── Inline Forms ──────────────────────────────────────────── */
.chat-form {
  padding: 4px 0 8px 40px;
  animation: messageSlideIn 0.4s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

.form-card {
  background: rgba(54, 57, 89, 0.04);
  border: 1px solid rgba(54, 57, 89, 0.12);
  border-radius: var(--border-radius-sm);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.form-group label {
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-group input,
.form-group select {
  padding: 10px 14px;
  border-radius: var(--border-radius-xs);
  border: 1px solid var(--border-glass);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 13.5px;
  font-family: inherit;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
}

.form-group input::placeholder {
  color: var(--text-muted);
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--rvcn-primary);
  box-shadow: 0 0 0 3px rgba(54, 57, 89, 0.08);
}

.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
}

.form-group select option {
  background: #ffffff;
  color: var(--text-primary);
}

.form-submit-btn {
  padding: 12px 20px;
  border-radius: var(--border-radius-xs);
  border: none;
  background: linear-gradient(135deg, var(--rvcn-primary), var(--rvcn-accent));
  color: white;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition-normal);
  margin-top: 4px;
}

.form-submit-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(54, 57, 89, 0.3);
}

.form-submit-btn:active {
  transform: translateY(0);
}

.form-submit-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* ─── Chat Input Area ───────────────────────────────────────── */
.chat-input-area {
  height: var(--input-height);
  padding: 0 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  border-top: 1px solid var(--border-glass);
  background: rgba(245, 246, 250, 0.95);
  flex-shrink: 0;
}

.chat-input {
  flex: 1;
  padding: 12px 16px;
  border-radius: 24px;
  border: 1px solid var(--border-glass);
  background: var(--bg-input);
  color: var(--text-primary);
  font-size: 13.5px;
  font-family: inherit;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.chat-input::placeholder {
  color: var(--text-muted);
}

.chat-input:focus {
  border-color: var(--rvcn-primary);
  box-shadow: 0 0 0 3px rgba(54, 57, 89, 0.08);
}

#chatContainer .chat-send-btn,
button.chat-send-btn {
  width: 42px !important;
  height: 42px !important;
  padding: 0 !important;
  border-radius: 50% !important;
  border: 1.5px solid rgba(255, 255, 255, 0.8) !important;
  outline: none !important;
  background: linear-gradient(135deg, var(--rvcn-primary), var(--rvcn-accent));
  color: white;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  cursor: pointer;
  transition: all var(--transition-normal);
  flex-shrink: 0;
}

.chat-send-btn:hover {
  transform: scale(1.08);
  box-shadow: 0 4px 15px rgba(54, 57, 89, 0.4);
}

.chat-send-btn:active {
  transform: scale(0.95);
}

.chat-send-btn svg {
  width: 18px;
  height: 18px;
}

/* ─── Floating Toggle Button ────────────────────────────────── */
#chatToggle,
button.chat-toggle {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 64px !important;
  height: 64px !important;
  padding: 0 !important;
  border-radius: 50% !important;
  border: 2px solid #ffffff !important;
  outline: none !important;
  background: linear-gradient(135deg, var(--rvcn-primary), var(--rvcn-accent));
  color: white !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  cursor: pointer;
  z-index: 999;
  box-shadow: 0 8px 25px rgba(54, 57, 89, 0.4), 0 0 30px rgba(54, 57, 89, 0.15);
  transition: all var(--transition-normal);
  animation: togglePulse 3s ease-in-out infinite;
}

.chat-toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 35px rgba(54, 57, 89, 0.5), 0 0 40px rgba(54, 57, 89, 0.2);
}

.chat-toggle.hidden {
  transform: scale(0);
  opacity: 0;
  pointer-events: none;
}

@keyframes togglePulse {
  0%, 100% { box-shadow: 0 8px 25px rgba(54, 57, 89, 0.4), 0 0 30px rgba(54, 57, 89, 0.15); }
  50% { box-shadow: 0 8px 35px rgba(54, 57, 89, 0.5), 0 0 50px rgba(54, 57, 89, 0.25); }
}

#chatToggle svg,
button.chat-toggle svg {
  width: 28px;
  height: 28px;
  transition: transform var(--transition-normal);
  color: #ffffff !important;
  stroke: #ffffff !important;
}

/* Notification badge */
#chatToggle .badge,
button.chat-toggle .badge {
  position: absolute;
  top: -2px;
  right: -2px;
  width: 20px;
  height: 20px;
  border-radius: 50% !important;
  background: #ef4444 !important;
  color: white !important;
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid #ffffff !important;
  animation: badgePop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes badgePop {
  from { transform: scale(0); }
  to { transform: scale(1); }
}

/* ─── Welcome Prompt ────────────────────────────────────────── */
.welcome-prompt {
  position: fixed;
  bottom: 100px;
  right: 24px;
  background: var(--bg-card);
  backdrop-filter: blur(15px);
  border: 1px solid var(--border-glass);
  border-radius: var(--border-radius-sm);
  padding: 14px 18px;
  max-width: 280px;
  box-shadow: var(--shadow-md);
  animation: promptSlideIn 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both;
  z-index: 998;
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.welcome-prompt:hover {
  border-color: var(--border-active);
  transform: translateY(-2px);
}

.welcome-prompt.hidden {
  animation: promptSlideOut 0.3s ease-in both;
  pointer-events: none;
}

.welcome-prompt-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50% !important;
  background: linear-gradient(135deg, var(--rvcn-primary), var(--rvcn-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}

.welcome-prompt-text {
  font-size: 13px;
  color: var(--text-primary);
  line-height: 1.4;
}

.welcome-prompt-text strong {
  color: var(--rvcn-primary);
}

.welcome-prompt-close {
  position: absolute;
  top: -8px;
  right: -8px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--border-glass);
  background: var(--bg-card);
  color: var(--text-muted);
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.welcome-prompt-close:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.4);
  color: #ef4444;
}

@keyframes promptSlideIn {
  from { opacity: 0; transform: translateY(20px) scale(0.9); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes promptSlideOut {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to { opacity: 0; transform: translateY(10px) scale(0.9); }
}

/* ─── Branding Page Background ──────────────────────────────── */
.landing-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 40px;
  text-align: center;
}

.landing-logo {
  width: 100px;
  height: 100px;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--rvcn-primary), var(--rvcn-accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  font-weight: 800;
  color: white;
  margin-bottom: 24px;
  box-shadow: 0 20px 40px rgba(54, 57, 89, 0.3);
  animation: logoFloat 6s ease-in-out infinite;
}

@keyframes logoFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.landing-title {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--text-primary), var(--rvcn-primary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.landing-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 400px;
  line-height: 1.6;
  margin-bottom: 32px;
}

.landing-cta {
  padding: 14px 32px;
  border-radius: 28px;
  border: none;
  background: linear-gradient(135deg, var(--rvcn-primary), var(--rvcn-accent));
  color: white;
  font-size: 15px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: 0 8px 25px rgba(54, 57, 89, 0.3);
}

.landing-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 35px rgba(54, 57, 89, 0.4);
}

.landing-info {
  margin-top: 48px;
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
  justify-content: center;
}

.landing-stat {
  text-align: center;
}

.landing-stat-value {
  font-size: 28px;
  font-weight: 800;
  color: var(--rvcn-primary);
}

.landing-stat-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 4px;
}

/* ─── Responsive ────────────────────────────────────────────── */
@media (max-width: 480px) {
  .chat-container {
    bottom: 0;
    right: 0;
    width: 100vw;
    height: 100vh;
    border-radius: 0;
  }

  .chat-toggle {
    bottom: 16px;
    right: 16px;
    width: 56px;
    height: 56px;
  }

  .welcome-prompt {
    right: 16px;
    bottom: 84px;
    max-width: 260px;
  }

  .landing-title {
    font-size: 28px;
  }

  .landing-info {
    gap: 20px;
  }
}

@media (min-width: 481px) and (max-width: 768px) {
  .chat-container {
    width: 380px;
    height: 580px;
  }
}

/* ─── Utility ───────────────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}