:root {
  --tw-primary: #E61C47;
  --tw-primary-hover: #c91839;
  --tw-bg: #FFFFFF;
  --tw-text: #111111;
  --tw-text-secondary: #6B7280;
  --tw-border: #E5E7EB;
  --tw-border-light: #F3F4F6;
  --tw-shadow: rgba(0, 0, 0, 0.1);
  --tw-shadow-strong: rgba(230, 28, 71, 0.15);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--tw-bg);
  color: var(--tw-text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.tw-container {
  display: flex;
  flex-direction: column;
  height: 100vh;
  background: var(--tw-bg);
}

.tw-header {
  background: linear-gradient(135deg, var(--tw-primary) 0%, #c91839 100%);
  color: #fff;
  padding: 16px 18px;
  border-top-left-radius: 16px;
  border-top-right-radius: 16px;
  box-shadow: 0 2px 8px var(--tw-shadow);
}

.tw-header-content {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tw-header-title {
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.01em;
}

.tw-header-subtitle {
  font-weight: 400;
  font-size: 13px;
  opacity: 0.9;
}

.tw-messages {
  flex: 1;
  padding: 16px;
  overflow-y: auto;
  overflow-x: hidden;
  background: #FAFAFA;
  border-left: 1px solid var(--tw-border);
  border-right: 1px solid var(--tw-border);
}

/* Стилизация скроллбара */
.tw-messages::-webkit-scrollbar {
  width: 6px;
}

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

.tw-messages::-webkit-scrollbar-thumb {
  background: var(--tw-border);
  border-radius: 3px;
}

.tw-messages::-webkit-scrollbar-thumb:hover {
  background: #D1D5DB;
}

.tw-form {
  display: flex;
  gap: 10px;
  padding: 14px;
  background: var(--tw-bg);
  border-left: 1px solid var(--tw-border);
  border-right: 1px solid var(--tw-border);
  border-bottom: 1px solid var(--tw-border);
  border-bottom-left-radius: 16px;
  border-bottom-right-radius: 16px;
  box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.03);
}

.tw-input {
  flex: 1;
  padding: 11px 14px;
  border: 1px solid var(--tw-border);
  border-radius: 10px;
  outline: none;
  font-size: 14px;
  transition: all 0.2s ease;
  background: var(--tw-bg);
}

.tw-input:focus {
  border-color: var(--tw-primary);
  box-shadow: 0 0 0 3px rgba(230, 28, 71, 0.1);
}

.tw-input::placeholder {
  color: var(--tw-text-secondary);
}

.tw-send {
  background: var(--tw-primary);
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 11px 16px;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 48px;
}

.tw-send:hover {
  background: var(--tw-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px var(--tw-shadow-strong);
}

.tw-send:active {
  transform: translateY(0);
}

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

.tw-msg {
  padding: 10px 14px;
  margin: 10px 0;
  border-radius: 12px;
  max-width: 85%;
  word-wrap: break-word;
  line-height: 1.5;
  font-size: 14px;
  animation: slideIn 0.3s ease;
}

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

.tw-user {
  background: var(--tw-primary);
  color: #fff;
  align-self: flex-end;
  margin-left: auto;
  border-bottom-right-radius: 4px;
}

.tw-assistant {
  background: var(--tw-bg);
  border: 1px solid var(--tw-border);
  align-self: flex-start;
  margin-right: auto;
  border-bottom-left-radius: 4px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

/* Индикатор загрузки */
.tw-loading {
  position: relative;
  color: transparent;
  min-width: 60px;
  pointer-events: none;
}

.tw-loading::after {
  content: '';
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--tw-text-secondary);
  animation: loadingDots 1.4s infinite;
}

.tw-loading::before {
  content: '';
  position: absolute;
  left: 28px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--tw-text-secondary);
  animation: loadingDots 1.4s infinite 0.2s;
}

@keyframes loadingDots {
  0%, 80%, 100% {
    opacity: 0.3;
    transform: translateY(-50%) scale(0.8);
  }
  40% {
    opacity: 1;
    transform: translateY(-50%) scale(1);
  }
}

/* Адаптивность для мобильных */
@media (max-width: 480px) {
  .tw-header {
    padding: 14px 16px;
  }

  .tw-messages {
    padding: 12px;
  }

  .tw-form {
    padding: 12px;
  }

  .tw-msg {
    font-size: 13px;
    max-width: 90%;
  }
}

/* Плавная прокрутка */
html {
  scroll-behavior: smooth;
}