:root {
  --bg-color-main: #0b0f19;
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --primary-accent: #0ea5e9;
  --primary-accent-glow: rgba(14, 165, 233, 0.5);
  --secondary-accent: #8b5cf6;
  --glass-bg: rgba(30, 41, 59, 0.6);
  --glass-border: rgba(255, 255, 255, 0.1);
  --input-bg: rgba(15, 23, 42, 0.8);
  --user-msg-bg: #0ebaff;
  --ai-msg-bg: rgba(255, 255, 255, 0.08);
}

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

html,
body {
  width: 100%;
  min-height: 100%;
}

body {
  font-family: "Inter", sans-serif;
  background-color: var(--bg-color-main);
  color: var(--text-primary);
  min-height: 100dvh;
  display: flex;
  justify-content: center;
  align-items: stretch;
  overflow: hidden;
  -webkit-text-size-adjust: 100%;
}

.background-effect {
  position: absolute;
  inset: -50%;
  background:
    radial-gradient(circle at center, var(--primary-accent-glow) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.3) 0%, transparent 40%);
  z-index: -1;
  filter: blur(100px);
}

.chat-container {
  width: min(100%, 850px);
  height: min(100dvh, 900px);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  backdrop-filter: blur(20px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  overflow: hidden;
  position: relative;
}

.chat-header,
.chat-messages,
.chat-input-area,
.header-content,
.header-info,
.message,
.bubble,
#chat-input {
  min-width: 0;
}

.chat-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--glass-border);
  background: rgba(0, 0, 0, 0.2);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.header-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-width: 0;
}

.clear-btn {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.6rem;
  border-radius: 50%;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.clear-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #ef4444;
  transform: scale(1.05);
}

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

.chat-header h1 {
  font-size: 1.5rem;
  font-weight: 600;
  color: #fff;
  line-height: 1.2;
  overflow-wrap: anywhere;
}

.ai-badge {
  background: var(--secondary-accent);
  color: white;
  padding: 0.3rem 0.9rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 0.3rem;
}

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

.chat-messages::-webkit-scrollbar {
  width: 8px;
}
.chat-messages::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 10px;
}
.chat-messages::-webkit-scrollbar-track {
  background: transparent;
}

.message {
  display: flex;
  max-width: 85%;
  animation: fadeIn 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

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

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

.bubble {
  padding: 1rem 1.2rem;
  border-radius: 18px;
  font-size: 0.95rem;
  line-height: 1.6;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.user-message .bubble {
  background: var(--user-msg-bg);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.ai-message .bubble {
  background: var(--ai-msg-bg);
  color: #fff;
  border: 1px solid var(--glass-border);
  border-bottom-left-radius: 4px;
}

.chat-input-area {
  padding: 1rem 1.2rem calc(1rem + env(safe-area-inset-bottom));
  background: rgba(0, 0, 0, 0.3);
  border-top: 1px solid var(--glass-border);
  display: flex;
  gap: 0.8rem;
  align-items: center;
}

#chat-input {
  flex: 1;
  min-width: 0;
  padding: 1rem 1.2rem;
  border-radius: 16px;
  border: 1px solid var(--glass-border);
  background: var(--input-bg);
  color: #fff;
  font-size: 16px;
  outline: none;
  transition: border-color 0.3s, box-shadow 0.3s;
}

#chat-input:focus {
  border-color: var(--primary-accent);
  box-shadow: 0 0 10px var(--primary-accent-glow);
}

.glow-on-hover {
  background: linear-gradient(90deg, var(--primary-accent), var(--secondary-accent));
  color: white;
  border: none;
  border-radius: 16px;
  padding: 0.9rem 1.2rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  flex: 0 0 auto;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  height: 100%;
}

.glow-on-hover:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 15px var(--primary-accent-glow);
}

.glow-on-hover:active {
  transform: translateY(0);
}

.glow-on-hover:disabled {
  background: #334155;
  color: #94a3b8;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}



.loading-indicator {
  display: inline-flex;
  align-self: flex-start;
  width: auto;
  max-width: none;
  flex: 0 0 auto;
}

.loading-indicator .bubble {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: auto;
  max-width: none;
  min-width: 0;
  min-height: 0;
  padding: 0.2rem 0.45rem;
  line-height: 1;
  white-space: nowrap;
  border-radius: 14px;
}

.animated-dots {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

.animated-dots span {
  display: inline-block;
  animation: textBlink 1.4s infinite both;
  font-weight: bold;
  letter-spacing: 0;
}

.animated-dots span:nth-child(2) { animation-delay: 0.2s; }
.animated-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes textBlink {
  0% { opacity: 0.2; transform: scale(0.9); }
  20% { opacity: 1; transform: scale(1.1); }
  100% { opacity: 0.2; transform: scale(0.9); }
}