:root {
  --blue-strong: #14417b;
  --blue-deep: #0f2f59;
  --blue-soft: #eef3fb;
  --blue-veil: #c7d6ee;
  --text-dark: #0f1a2b;
  --border-soft: #c3d1e6;
  --shadow-soft: 0 6px 18px rgba(10, 23, 46, 0.08);
  --shadow-bubble: 0 3px 10px rgba(10, 23, 46, 0.12);
}

body {
  font-family: "Arial";
  margin: 0;
  color: var(--text-dark);
  background: linear-gradient(180deg, var(--blue-soft) 0%, #ffffff 55%);
}

.site-header {
  background: var(--blue-strong);
  color: #fff;
  box-shadow: 0 10px 30px rgba(12, 32, 64, 0.18);
}

.site-header__inner {
  max-width: 880px;
  margin: 0 auto;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-icon {
  width: 44px;
  height: 44px;
  display: block;
  padding: 2px;
  border-radius: 50%;
  background: #fff;
  box-sizing: content-box;
}

.site-logo {
  height: 80px;
  width: auto;
  display: block;
}

.site-title {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.site-footer {
  background: var(--blue-strong);
  color: #fff;
  margin-top: 36px;
}

.site-footer__inner {
  max-width: 880px;
  margin: 0 auto;
  padding: 16px;
  font-size: 13px;
  letter-spacing: 0.02em;
}

.site-footer__inner p {
  margin: 0;
}

.site-footer a {
  color: #fff;
  text-decoration: underline;
}

.site-footer a:hover {
  color: #eef3fb;
}

.container {
  max-width: 880px;
  margin: 28px auto 40px;
  padding: 0 16px;
}

h1 {
  margin: 0 0 16px;
  font-size: 28px;
  color: var(--blue-strong);
  letter-spacing: 0.02em;
}

.page-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 0 0 16px;
}

.page-title .info-popover {
  margin-left: auto;
}

.page-title h1 {
  margin: 0;
}

.info-popover {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.info-button {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid transparent;
  background: transparent;
  color: var(--blue-strong);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    transform 0.2s ease;
}

.info-button:hover,
.info-button:focus-visible {
  background: var(--blue-soft);
  border-color: var(--blue-veil);
  transform: translateY(-1px);
}

.info-icon {
  width: 28px;
  height: 28px;
  display: block;
  background-color: currentColor;
  mask: url("/media/info.svg") no-repeat center / contain;
  -webkit-mask: url("/media/info.svg") no-repeat center / contain;
}

.info-panel {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  left: auto;
  width: 280px;
  max-width: 80vw;
  background: #fff;
  color: #1b2b44;
  border: 1px solid var(--border-soft);
  border-radius: 14px;
  padding: 12px 14px;
  box-shadow: var(--shadow-soft);
  font-size: 13px;
  line-height: 1.45;
  opacity: 0;
  transform: translateY(6px);
  pointer-events: none;
  transition:
    opacity 0.2s ease,
    transform 0.2s ease;
  z-index: 10;
}

.info-popover:hover .info-panel,
.info-popover:focus-within .info-panel {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.chatbox {
  border: 1px solid var(--border-soft);
  border-radius: 0;
  padding: 18px 16px;
  min-height: 360px;
  max-height: 60vh;
  overflow: auto;
  background: var(--blue-soft);
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.row {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  flex-wrap: wrap;
  align-items: center;
}

.row input,
.row button,
.row select {
  font-family: inherit;
}

.row input {
  flex: 1;
  min-width: 220px;
  padding: 12px 14px;
  border-radius: 18px;
  border-top-right-radius: 6px;
  border: 1px solid var(--blue-deep);
  font-size: 15px;
  background: linear-gradient(135deg, #1f5098 0%, #123a70 100%);
  color: #fff;
  box-shadow: var(--shadow-bubble);
}

.row input::placeholder {
  color: rgba(255, 255, 255, 0.75);
}

.row button {
  padding: 12px 20px;
  border-radius: 18px;
  border-top-right-radius: 6px;
  border: 1px solid var(--blue-deep);
  background: #fff;
  color: var(--blue-strong);
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  box-shadow: var(--shadow-bubble);
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background 0.2s ease;
}

.row button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.row button:not(:disabled):hover {
  transform: translateY(-1px);
  background: var(--blue-soft);
}

.row select {
  padding: 12px 14px;
  border-radius: 18px;
  border-top-left-radius: 6px;
  border: 1px solid var(--blue-deep);
  background: linear-gradient(135deg, #1f5098 0%, #123a70 100%);
  font-size: 14px;
  color: #fff;
}

.row select option {
  color: #111;
  background: #fff;
}

.bubble {
  max-width: 80%;
  padding: 12px 14px;
  border-radius: 20px;
  margin: 0;
  line-height: 1.45;
  font-size: 15px;
  box-shadow: var(--shadow-bubble);
  border: 1px solid rgba(0, 0, 0, 0.05);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.bubble-text {
  white-space: pre-wrap;
  word-break: break-word;
}

.bubble-meta {
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--blue-deep);
}

.bubble.me {
  margin-left: auto;
  background: var(--blue-strong);
  color: #fff;
  border-top-right-radius: 6px;
}

.bubble.bot {
  margin-right: auto;
  background: #fff;
  color: #111;
  border-top-left-radius: 6px;
}

.bubble.loading {
  border-style: dashed;
  border-color: var(--blue-veil);
  background: rgba(255, 255, 255, 0.75);
}

.typing-dots {
  display: inline-flex;
  gap: 6px;
  align-items: center;
}

.typing-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--blue-strong);
  animation: typingBounce 1s ease-in-out infinite;
  filter: saturate(80%);
}

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

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

@keyframes typingBounce {
  0%,
  80%,
  100% {
    transform: translateY(0);
    opacity: 0.5;
  }
  40% {
    transform: translateY(-6px);
    opacity: 1;
  }
}

.hint {
  color: #555;
  font-size: 14px;
  margin-top: 12px;
}

.chat-info {
  margin-top: 24px;
  background: #fff;
  border: 1px solid var(--border-soft);
  border-radius: 0;
  padding: 24px;
  box-shadow: var(--shadow-soft);
}

.chat-info__title {
  margin: 0 0 12px;
  font-size: 18px;
  color: var(--blue-deep);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.model-description {
  margin: 0 0 16px;
  color: #243553;
  line-height: 1.5;
}

.description-model-name {
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--blue-strong);
}

.model-link {
  display: inline-block;
  margin-top: 6px;
  color: var(--blue-strong);
  font-weight: 600;
  text-decoration: none;
}

.model-link:hover {
  text-decoration: underline;
}

.model-compare {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin-top: 12px;
  font-size: 14px;
  background: #fff;
  border: 1px solid var(--border-soft);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-bubble);
}

.model-compare th,
.model-compare td {
  border-bottom: 1px solid var(--border-soft);
  padding: 12px 10px;
  text-align: left;
}

.model-compare tbody tr:last-child td {
  border-bottom: 0;
}

.model-compare th {
  color: var(--blue-deep);
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.06em;
  background: var(--blue-soft);
}

.model-compare tbody tr:nth-child(even) {
  background: #f3f6fc;
}

@media (max-width: 720px) {
  .site-header__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-icon {
    width: 18px;
    height: 18px;
  }

  .site-logo {
    height: 32px;
  }

  .site-title {
    font-size: 20px;
  }

  .site-footer__inner {
    font-size: 12px;
  }

  .model-compare {
    display: block;
    border: 0;
    background: transparent;
    box-shadow: none;
  }

  .model-compare thead {
    display: none;
  }

  .model-compare tbody {
    display: block;
  }

  .model-compare tbody tr {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    padding: 14px 12px;
    border: 1px solid var(--border-soft);
    border-radius: 16px;
    background: #fff;
    box-shadow: var(--shadow-bubble);
    margin-bottom: 12px;
  }

  .model-compare tbody tr:last-child {
    margin-bottom: 0;
  }

  .model-compare td {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 0;
    border-bottom: 0;
    text-align: left;
  }

  .model-compare td::before {
    content: attr(data-label);
    font-weight: 600;
    color: var(--blue-deep);
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 0.06em;
  }

  .model-compare tbody tr:nth-child(even) {
    background: #fff;
  }
}