:root {
  --color-primary: #003366;
  --color-secondary: #c0c0c0;
  --color-tertiary: #ffffff;
  --color-neutral: #e0e0e0;
  --color-surface: #00bfff;
  --color-accent: #36454f;
  --color-success: #008000;
  --color-warning: #ffa500;
  --color-danger: #b42318;
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.06);
  --radius: 0.5rem;
  --max-width: 1280px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Roboto", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--color-accent);
  background:
    linear-gradient(rgba(0, 51, 102, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 51, 102, 0.04) 1px, transparent 1px),
    radial-gradient(circle at 78% 18%, rgba(0, 191, 255, 0.14), transparent 28rem),
    #f7fafc;
  background-size: 32px 32px, 32px 32px, auto, auto;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

code,
pre {
  font-family: "JetBrains Mono", monospace;
}

.page-shell {
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  padding: 0;
  background: rgba(247, 250, 252, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0, 51, 102, 0.08);
  border-radius: 0;
}

.nav-inner {
  width: min(100%, var(--max-width));
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand,
.nav-links {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-weight: 600;
}

.brand-mark {
  width: 1.75rem;
  height: 1.75rem;
  display: inline-grid;
  place-items: center;
  color: var(--color-primary);
}

.brand-mark svg {
  width: 100%;
  height: 100%;
  display: block;
  fill: rgba(0, 191, 255, 0.14);
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.nav-links a {
  font-size: 0.875rem;
  color: var(--color-primary);
  border-bottom: 2px solid transparent;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  border-color: var(--color-surface);
}

.menu-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid rgba(0, 51, 102, 0.14);
  border-radius: var(--radius);
  background: var(--color-tertiary);
  cursor: pointer;
  place-items: center;
  padding: 0.65rem;
}

.menu-toggle span {
  display: block;
  width: 1.25rem;
  height: 2px;
  margin: 3px 0;
  border-radius: 999px;
  background: var(--color-primary);
  transition: transform 200ms ease-out, opacity 200ms ease-out;
}

.menu-toggle.is-open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.menu-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.is-open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.9fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
}

.hero {
  min-height: min(760px, 100dvh);
  padding: clamp(4rem, 8vw, 8rem) 0;
}

.eyebrow {
  margin: 0 0 0.75rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 12ch;
  font-size: clamp(2.5rem, 5vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: var(--color-primary);
}

h2 {
  font-size: 2.25rem;
  line-height: 1.15;
  color: var(--color-primary);
}

h3 {
  font-size: 1.1rem;
  color: var(--color-primary);
}

.hero-description,
.section-heading p,
.info-card p {
  max-width: 72ch;
}

.hero-actions,
.input-row {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

.button {
  border: 0;
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: transform 200ms ease-out, box-shadow 200ms ease-out, background 200ms ease-out;
}

.button-primary {
  color: var(--color-neutral);
  background: var(--color-primary);
  box-shadow: 0 8px 24px rgba(0, 51, 102, 0.18);
}

.button-primary:hover {
  transform: translateY(-2px);
  background: #002b57;
}

.button-primary:active {
  transform: translateY(1px);
}

.button-secondary {
  color: var(--color-primary);
  background: transparent;
  border: 1.5px solid rgba(0, 51, 102, 0.2);
}

.button:disabled {
  cursor: not-allowed;
  opacity: 0.65;
  transform: none;
}

.send-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 3.25rem;
}

.send-icon {
  display: none;
  width: 1.2rem;
  height: 1.2rem;
  fill: currentColor;
}

.tech-panel,
.chat-card,
.provider-card,
.info-card {
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(0, 51, 102, 0.1);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.tech-panel {
  padding: clamp(1rem, 3vw, 2rem);
}

.chip-card {
  position: relative;
  min-height: 420px;
  overflow: hidden;
  border-radius: var(--radius);
  padding: 1.25rem;
  color: var(--color-tertiary);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
}

.chip-card::before {
  content: "";
  position: absolute;
  inset: 1rem;
  border: 1px solid rgba(224, 224, 224, 0.22);
  border-radius: var(--radius);
}

.chip-header,
.metrics {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-family: "JetBrains Mono", monospace;
}

.chip-grid {
  display: none;
}

.chip-grid span {
  border: 1px solid rgba(0, 191, 255, 0.42);
  background: rgba(0, 191, 255, 0.08);
  animation: pulse 2.8s ease-out infinite;
}

.signal-lines {
  display: none;
}

.signal-lines i {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-surface), transparent);
  opacity: 0.75;
}

.scroll-clean {
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.scroll-clean::-webkit-scrollbar {
  width: 0;
  height: 0;
}

.metrics {
  position: absolute;
  right: 1.25rem;
  bottom: 1.25rem;
  left: 1.25rem;
}

.router-providers {
  position: absolute;
  right: 1.25rem;
  bottom: 5.75rem;
  left: 1.25rem;
  top: 4.5rem;
  z-index: 1;
  overflow-y: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.router-providers::-webkit-scrollbar {
  width: 0;
  height: 0;
}

.metrics span,
.message-meta,
.small-note {
  display: block;
  font-size: 0.78rem;
  color: rgba(54, 69, 79, 0.72);
}

.chip-card .metrics span {
  color: rgba(255, 255, 255, 0.68);
}

.chat-section,
.info-section {
  padding: clamp(4rem, 8vw, 8rem) 0;
}

.chat-layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.provider-card,
.chat-card,
.info-card {
  padding: 1.25rem;
}

.provider-list {
  display: grid;
  gap: 0.75rem;
}

.provider-list.compact {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.45rem;
}

.provider-item {
  position: relative;
  padding: 0.65rem 0.75rem;
  padding-left: 2rem;
  border: 1px solid var(--color-neutral);
  border-radius: var(--radius);
  background: var(--color-tertiary);
}

.chip-card .provider-item {
  padding-top: 0.45rem;
  padding-bottom: 0.45rem;
  border-color: rgba(224, 224, 224, 0.18);
  background: rgba(255, 255, 255, 0.08);
}

.chip-card .provider-item strong,
.chip-card .provider-item .small-note {
  color: rgba(255, 255, 255, 0.82);
}

.status-dot {
  position: absolute;
  top: 1rem;
  left: 0.75rem;
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 999px;
  box-shadow: 0 0 0 4px rgba(0, 191, 255, 0.08);
}

.status-dot.green {
  background: var(--color-success);
}

.status-dot.red {
  background: var(--color-danger);
}

.status-dot.blue {
  background: var(--color-surface);
}

.provider-select-wrap {
  position: relative;
  flex: 0 0 auto;
  min-width: 12rem;
}

.provider-select-wrap .status-dot {
  top: 50%;
  left: 0.85rem;
  z-index: 1;
  transform: translateY(-50%);
}

.provider-item strong {
  display: block;
  color: var(--color-primary);
}

.messages {
  display: grid;
  align-content: start;
  gap: 1rem;
  min-width: 0;
  min-height: 360px;
  max-height: 560px;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 0.25rem;
}

.chat-section-full {
  min-height: calc(100dvh - 4.75rem);
  padding: clamp(1.5rem, 4vw, 3rem) 0;
}

.chat-layout-full {
  display: block;
}

.chat-card-full {
  min-height: calc(100dvh - 16rem);
  display: flex;
  flex-direction: column;
}

.chat-card-full .messages {
  flex: 1;
  max-height: none;
  min-height: 52vh;
}

.message {
  width: fit-content;
  max-width: min(82%, 760px);
  min-width: 0;
  padding: 0.85rem 1rem;
  border: 1px solid var(--color-neutral);
  border-radius: var(--radius);
  background: var(--color-tertiary);
  animation: enter 420ms ease-out both;
}

.message.assistant:first-child {
  width: 100%;
  max-width: 100%;
  padding: 1rem;
}

.typing-message {
  min-width: 8.5rem;
}

.typing-dots {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 1.5rem;
}

.typing-dots span {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 999px;
  background: var(--color-surface);
  animation: typing-bounce 1s ease-in-out infinite;
}

.typing-dots span:nth-child(2) {
  animation-delay: 140ms;
}

.typing-dots span:nth-child(3) {
  animation-delay: 280ms;
}

.message-body {
  display: grid;
  gap: 0.8rem;
  min-width: 0;
  max-width: 100%;
}

.message p,
.message h1,
.message h2,
.message h3,
.message h4,
.message ul,
.message ol,
.message pre,
.message table {
  margin: 0;
}

.message p,
.message li,
.message td,
.message th {
  overflow-wrap: anywhere;
  word-break: normal;
}

.message h1,
.message h2,
.message h3,
.message h4 {
  color: var(--color-primary);
  line-height: 1.25;
}

.message h1 { font-size: 1.35rem; }
.message h2 { font-size: 1.2rem; }
.message h3,
.message h4 { font-size: 1.05rem; }

.message ul,
.message ol {
  padding-left: 1.25rem;
}

.message li + li {
  margin-top: 0.35rem;
}

.message code {
  padding: 0.12rem 0.3rem;
  border-radius: 0.3rem;
  color: var(--color-primary);
  background: rgba(0, 51, 102, 0.08);
  font-size: 0.92em;
}

.code-block {
  display: block;
  max-width: 100%;
  width: 100%;
  min-width: 0;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  touch-action: pan-x;
  border: 1px solid rgba(0, 51, 102, 0.12);
  border-radius: var(--radius);
  background: #f6f9fb;
}

.message-body > .code-block,
.message-body > .table-scroll {
  justify-self: stretch;
  width: 100%;
  max-width: 100%;
}

.code-block::-webkit-scrollbar,
.table-scroll::-webkit-scrollbar {
  height: 0.55rem;
}

.code-block::-webkit-scrollbar-track,
.table-scroll::-webkit-scrollbar-track {
  background: rgba(0, 51, 102, 0.06);
}

.code-block::-webkit-scrollbar-thumb,
.table-scroll::-webkit-scrollbar-thumb {
  border-radius: 999px;
  background: rgba(0, 51, 102, 0.32);
}

.code-toolbar {
  min-width: max-content;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.45rem 0.55rem 0.45rem 0.75rem;
  border-bottom: 1px solid rgba(0, 51, 102, 0.1);
  color: rgba(54, 69, 79, 0.72);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.copy-code-button {
  min-height: auto;
  padding: 0.28rem 0.55rem;
  border: 1px solid rgba(0, 51, 102, 0.18);
  border-radius: 0.4rem;
  color: var(--color-primary);
  background: var(--color-tertiary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
}

.copy-code-button:hover,
.copy-code-button.is-copied {
  color: var(--color-tertiary);
  background: var(--color-primary);
}

.message pre {
  display: block;
  width: max-content;
  min-width: 100%;
  max-width: none;
  margin: 0;
  padding: 0.85rem;
  overflow: visible;
  white-space: pre;
}

.message pre code {
  display: block;
  width: max-content;
  min-width: 100%;
  padding: 0;
  color: inherit;
  background: transparent;
}

.table-scroll {
  display: block;
  max-width: 100%;
  width: 100%;
  min-width: 0;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  touch-action: pan-x;
  border: 1px solid rgba(0, 51, 102, 0.1);
  border-radius: var(--radius);
}

.message table {
  display: table;
  width: max-content;
  min-width: max(34rem, 100%);
  border-collapse: collapse;
  font-size: 0.92rem;
  background: var(--color-tertiary);
}

.message th,
.message td {
  padding: 0.65rem;
  border-bottom: 1px solid rgba(0, 51, 102, 0.08);
  text-align: left;
  vertical-align: top;
}

.message th {
  color: var(--color-primary);
  background: rgba(0, 191, 255, 0.08);
}

.message.user {
  justify-self: end;
  color: var(--color-tertiary);
  background: var(--color-primary);
}

.message.user .message-meta {
  color: rgba(255, 255, 255, 0.72);
}

.message.error {
  border-color: rgba(180, 35, 24, 0.2);
  background: #fff7f5;
}

.chat-form {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-neutral);
}

.chat-form label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

textarea,
input[type="text"] {
  width: 100%;
  min-height: 3.25rem;
  border: 1px solid rgba(54, 69, 79, 0.28);
  border-radius: var(--radius);
  padding: 0 0.9rem;
  font: inherit;
  color: var(--color-accent);
  background: var(--color-tertiary);
}

textarea {
  resize: vertical;
  padding-top: 0.85rem;
}

.provider-select {
  width: 100%;
  min-width: 12rem;
  height: 3.25rem;
  border: 1px solid rgba(54, 69, 79, 0.28);
  border-radius: var(--radius);
  padding: 0 0.85rem 0 2.25rem;
  font: inherit;
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-tertiary);
  cursor: pointer;
}

.provider-select-button {
  position: relative;
  display: flex;
  align-items: center;
  text-align: left;
}

.provider-select-button::after {
  content: "";
  position: absolute;
  right: 0.9rem;
  width: 0.45rem;
  height: 0.45rem;
  border-right: 2px solid var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
  transform: rotate(45deg) translateY(-2px);
}

.provider-menu {
  position: absolute;
  right: 0;
  bottom: calc(100% + 0.5rem);
  left: 0;
  z-index: 300;
  display: none;
  max-height: 18rem;
  overflow-y: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 0.35rem;
  border: 1px solid rgba(0, 51, 102, 0.12);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 16px 40px rgba(0, 51, 102, 0.14);
}

.provider-menu::-webkit-scrollbar {
  width: 0;
  height: 0;
}

.provider-menu.is-open {
  display: grid;
  gap: 0.25rem;
  animation: enter 180ms ease-out both;
}

.provider-option {
  position: relative;
  width: 100%;
  min-height: 2.65rem;
  padding: 0.55rem 0.75rem 0.55rem 2.25rem;
  border: 0;
  border-radius: calc(var(--radius) - 2px);
  font: inherit;
  font-weight: 500;
  color: var(--color-primary);
  text-align: left;
  background: transparent;
  cursor: pointer;
}

.provider-option .status-dot {
  top: 50%;
  left: 0.85rem;
  transform: translateY(-50%);
}

.provider-option:hover,
.provider-option[aria-selected="true"] {
  background: rgba(0, 191, 255, 0.1);
}

textarea:focus-visible,
input[type="text"]:focus-visible,
.provider-select:focus-visible,
.button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-surface);
  outline-offset: 2px;
}

pre {
  overflow-x: auto;
  padding: 1rem;
  border-radius: var(--radius);
  color: var(--color-tertiary);
  background: var(--color-accent);
}

.reveal {
  animation: enter 420ms ease-out both;
}

@keyframes enter {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.45;
  }
  50% {
    opacity: 1;
  }
}

@keyframes typing-bounce {
  0%,
  80%,
  100% {
    opacity: 0.35;
    transform: translateY(0);
  }
  40% {
    opacity: 1;
    transform: translateY(-4px);
  }
}

@media (max-width: 768px) {
  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .chat-form {
    margin-top: 0.75rem;
    padding-top: 0.75rem;
  }

  .chat-form label {
    font-size: 0.875rem;
  }

  .input-row {
    display: grid;
    grid-template-columns: minmax(5.75rem, 0.42fr) minmax(0, 1fr) 3.25rem;
    gap: 0.45rem;
    align-items: center;
  }

  .input-row input[type="text"] {
    grid-column: 2 / 3;
    grid-row: 1 / 2;
    min-width: 0;
    padding-right: 0.75rem;
  }

  .input-row .send-button {
    grid-column: 3 / 4;
    grid-row: 1 / 2;
    width: 3.25rem;
    min-width: 3.25rem;
    height: 3.25rem;
    padding: 0;
    border-radius: 999px;
  }

  .send-button .send-label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
  }

  .send-icon {
    display: block;
  }

  .nav-inner {
    position: relative;
    align-items: center;
  }

  .menu-toggle {
    display: grid;
  }

  .nav-links {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 1.5rem;
    left: 1.5rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 0.75rem;
    border: 1px solid rgba(0, 51, 102, 0.1);
    border-radius: var(--radius);
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow-card);
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    padding: 0.75rem;
    border-bottom: 0;
    border-radius: calc(var(--radius) - 2px);
  }

  .nav-links a:hover,
  .nav-links a:focus-visible {
    background: rgba(0, 191, 255, 0.08);
  }

  .section-grid,
  .chat-layout {
    grid-template-columns: 1fr;
  }

  .provider-list.compact {
    grid-template-columns: 1fr;
  }

  .provider-select-wrap {
    grid-column: 1 / 2;
    grid-row: 1 / 2;
    width: 100%;
    min-width: 0;
  }

  .provider-select {
    min-width: 0;
    height: 3.25rem;
    padding-right: 1.45rem;
    padding-left: 1.85rem;
    overflow: hidden;
    font-size: 0.82rem;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .provider-select-wrap .status-dot {
    left: 0.65rem;
    width: 0.5rem;
    height: 0.5rem;
    box-shadow: 0 0 0 3px rgba(0, 191, 255, 0.08);
  }

  .provider-select-button::after {
    right: 0.62rem;
    width: 0.35rem;
    height: 0.35rem;
  }

  .provider-menu {
    right: auto;
    left: 0;
    width: min(18rem, calc(100vw - 3rem));
  }

  h1 {
    max-width: 100%;
  }

  .chat-section-full {
    padding-right: 0;
    padding-left: 0;
  }

  .chat-card,
  .chat-card-full {
    padding: 0.75rem;
  }

  .chat-card-full .messages {
    min-height: 58vh;
  }

  .messages {
    gap: 0.75rem;
    padding: 0;
  }

  .message {
    width: auto;
    max-width: 94%;
    padding: 0.75rem;
    border-radius: 0.75rem;
  }

  .message.assistant {
    justify-self: start;
    width: min(100%, calc(100vw - 2.25rem));
    max-width: min(100%, calc(100vw - 2.25rem));
  }

  .message.user {
    justify-self: end;
    max-width: 88%;
  }

  .message.assistant:first-child {
    width: min(100%, calc(100vw - 2.25rem));
    max-width: min(100%, calc(100vw - 2.25rem));
  }

  .message-body {
    gap: 0.7rem;
  }

  .message h1 { font-size: 1.15rem; }
  .message h2 { font-size: 1.08rem; }
  .message h3,
  .message h4 { font-size: 1rem; }

  .message table {
    display: table;
    width: max-content;
    min-width: max(34rem, 100%);
    font-size: 0.82rem;
  }

  .message th,
  .message td {
    padding: 0.5rem;
  }

  .code-toolbar {
    position: sticky;
    left: 0;
  }

  .message pre {
    padding: 0.75rem;
    font-size: 0.82rem;
  }
}