:root {
  --rd10-ai-page: #f3f0ea;
  --rd10-ai-hero: #d8d3c9;
  --rd10-ai-paper: #f8f6f1;
  --rd10-ai-surface: #ffffff;
  --rd10-ai-ink: #1f2428;
  --rd10-ai-muted: #60666b;
  --rd10-ai-faint: #8a8f92;
  --rd10-ai-line: #d8d1c6;
  --rd10-ai-soft: #ece7de;
  --rd10-ai-dark: #262b30;
  --rd10-ai-focus: #2563eb;
  --rd10-ai-error: #8a342d;
}

.rd10-ai-app__feedback {
  display: grid;
  gap: 0.4rem;
  margin-top: 0.8rem;
  color: #60666b;
  font-size: 0.76rem;
}

.rd10-ai-app__feedback-actions,
.rd10-ai-app__feedback-reason-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.rd10-ai-app__feedback-button,
.rd10-ai-app__feedback-reason-submit {
  border: 1px solid rgba(118, 129, 140, 0.38);
  border-radius: 999px;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font: inherit;
  padding: 0.3rem 0.62rem;
}

.rd10-ai-app__feedback-button:hover,
.rd10-ai-app__feedback-button--selected,
.rd10-ai-app__feedback-reason-submit:hover {
  border-color: #217e6b;
  color: #155e50;
}

.rd10-ai-app__feedback-button:disabled,
.rd10-ai-app__feedback-reason-submit:disabled {
  cursor: default;
  opacity: 0.55;
}

.rd10-ai-app__feedback-reason {
  max-width: 12rem;
  border: 1px solid rgba(118, 129, 140, 0.38);
  border-radius: 0.35rem;
  background: #fff;
  color: #1f2b32;
  font: inherit;
  padding: 0.25rem;
}

.rd10-ai-app__feedback-status {
  min-height: 1em;
}

html { scroll-behavior: smooth; }

body.rd10-ai-page {
  min-width: 320px;
  min-width: min(320px, 100%);
  margin: 0;
  background: var(--rd10-ai-page);
  color: var(--rd10-ai-ink);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.5;
}

.rd10-ai-page *,
.rd10-ai-page *::before,
.rd10-ai-page *::after { box-sizing: border-box; }

.rd10-ai-page a { color: inherit; }

.rd10-ai-page button,
.rd10-ai-page textarea { font: inherit; }

.rd10-ai-page button { cursor: pointer; }

.rd10-ai-page button:disabled { cursor: not-allowed; opacity: 0.48; }

.rd10-ai-topbar {
  display: flex;
  min-height: 70px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px max(24px, calc((100vw - 1420px) / 2));
  border-bottom: 1px solid var(--rd10-ai-line);
  background: rgba(243, 240, 234, 0.96);
}

.rd10-ai-topbar__brand,
.rd10-ai-topbar__back { text-decoration: none; font-weight: 800; }

.rd10-ai-topbar__brand { letter-spacing: 0.08em; }

.rd10-ai-topbar__back {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  padding: 8px 15px;
  border: 1px solid var(--rd10-ai-line);
  border-radius: 999px;
  background: var(--rd10-ai-surface);
  font-size: 0.9rem;
}

.rd10-ai-topbar__back:hover { border-color: #979087; background: #fff; }

.rd10-ai-page-main {
  width: min(1420px, calc(100% - 48px));
  margin: 0 auto;
  padding: 48px 0 68px;
}

.rd10-ai-app { display: grid; min-width: 0; gap: 28px; }

.rd10-ai-app__intro {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.37fr);
  gap: 34px;
  align-items: end;
  padding: 28px 0 4px;
}

.rd10-ai-app__eyebrow,
.rd10-ai-app__section-kicker,
.rd10-ai-app__reference-category {
  margin: 0;
  color: var(--rd10-ai-muted);
  font-size: 0.73rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.rd10-ai-app__eyebrow { display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }

.rd10-ai-app__status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #54765b;
  box-shadow: 0 0 0 4px rgba(84, 118, 91, 0.12);
}

.rd10-ai-app__title {
  max-width: 880px;
  margin: 0;
  font-size: clamp(2.5rem, 5.4vw, 5.2rem);
  letter-spacing: -0.055em;
  line-height: 0.98;
}

.rd10-ai-app__lede {
  max-width: 750px;
  margin: 20px 0 0;
  color: #4c5358;
  font-size: clamp(1rem, 1.7vw, 1.2rem);
  line-height: 1.55;
}

.rd10-ai-app__intro-note {
  display: grid;
  gap: 10px;
  padding: 21px;
  border: 1px solid #bcb5ab;
  border-radius: 17px;
  background: rgba(255, 255, 255, 0.46);
}

.rd10-ai-app__note-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 11px;
  background: var(--rd10-ai-ink);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.rd10-ai-app__note-label,
.rd10-ai-app__note-copy { margin: 0; }

.rd10-ai-app__note-label { font-size: 1.02rem; font-weight: 800; }

.rd10-ai-app__note-copy { color: var(--rd10-ai-muted); font-size: 0.9rem; }

.rd10-ai-app__workspace {
  display: grid;
  width: 100%;
  min-width: 0;
  min-height: 560px;
  height: clamp(560px, 72vh, 760px);
  height: clamp(560px, 72dvh, 760px);
  grid-template-columns: minmax(230px, 290px) minmax(0, 1fr);
  gap: 16px;
}

.rd10-ai-app__discovery,
.rd10-ai-app__conversation-panel {
  min-width: 0;
  border: 1px solid var(--rd10-ai-line);
  border-radius: 22px;
  background: var(--rd10-ai-paper);
  box-shadow: 0 13px 38px rgba(31, 36, 40, 0.07);
}

.rd10-ai-app__discovery { display: flex; flex-direction: column; overflow: hidden; padding: 24px 18px; }

.rd10-ai-app__discovery-header { padding: 0 5px 18px; }

.rd10-ai-app__discovery-title,
.rd10-ai-app__conversation-title { margin: 5px 0 0; font-size: 1.32rem; line-height: 1.2; }

.rd10-ai-app__discovery-copy { margin: 10px 0 0; color: var(--rd10-ai-muted); font-size: 0.9rem; }

.rd10-ai-app__discovery-list { display: grid; min-width: 0; gap: 7px; overflow-y: auto; }

.rd10-ai-app__discovery-button {
  width: 100%;
  min-height: 44px;
  padding: 9px 11px;
  border: 1px solid transparent;
  border-radius: 11px;
  background: transparent;
  color: #3c4246;
  font-size: 0.84rem;
  line-height: 1.35;
  text-align: left;
  transition: border-color 150ms ease, background 150ms ease, transform 150ms ease;
}

.rd10-ai-app__discovery-button:hover:not(:disabled) { border-color: var(--rd10-ai-line); background: #fff; transform: translateX(2px); }

.rd10-ai-app__conversation-panel { display: flex; min-height: 0; flex-direction: column; overflow: hidden; }

.rd10-ai-app__conversation-header {
  display: flex;
  min-height: 74px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 21px;
  border-bottom: 1px solid var(--rd10-ai-line);
  background: rgba(255, 255, 255, 0.7);
}

.rd10-ai-app__conversation-title { font-size: 1.14rem; }

.rd10-ai-app__reset,
.rd10-ai-app__retry,
.rd10-ai-app__send {
  min-height: 44px;
  border: 1px solid var(--rd10-ai-ink);
  border-radius: 999px;
  font-weight: 800;
}

.rd10-ai-app__reset { padding: 8px 14px; background: transparent; color: var(--rd10-ai-ink); font-size: 0.82rem; }

.rd10-ai-app__reset:hover { background: var(--rd10-ai-soft); }

.rd10-ai-app__conversation {
  min-height: 0;
  flex: 1 1 auto;
  overflow-x: hidden;
  overflow-y: auto;
  padding: 30px clamp(20px, 5vw, 82px) 34px;
  scrollbar-color: #b9b1a6 transparent;
  scrollbar-width: thin;
}

.rd10-ai-app__welcome { max-width: 900px; margin: 8px auto 0; }

.rd10-ai-app__welcome-mark {
  display: grid;
  width: 47px;
  height: 47px;
  margin-bottom: 17px;
  place-items: center;
  border: 1px solid var(--rd10-ai-line);
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 8px 20px rgba(31, 36, 40, 0.07);
  font-size: 1.2rem;
}

.rd10-ai-app__welcome-title { max-width: 680px; margin: 0; font-size: clamp(1.75rem, 3vw, 2.7rem); letter-spacing: -0.035em; line-height: 1.08; }

.rd10-ai-app__welcome-copy { max-width: 710px; margin: 13px 0 0; color: var(--rd10-ai-muted); font-size: 1rem; }

.rd10-ai-app__welcome-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-top: 30px; }

.rd10-ai-app__welcome-item { padding: 15px; border: 1px solid var(--rd10-ai-line); border-radius: 14px; background: rgba(255, 255, 255, 0.56); }

.rd10-ai-app__welcome-item h3 { margin: 0; font-size: 0.9rem; }

.rd10-ai-app__welcome-item p { margin: 7px 0 0; color: var(--rd10-ai-muted); font-size: 0.82rem; }

.rd10-ai-app__loading-note { margin: 22px 0 0; color: var(--rd10-ai-muted); font-size: 0.86rem; }

.rd10-ai-app__unavailable { display: grid; max-width: 500px; gap: 8px; margin-top: 22px; padding: 16px; border-left: 4px solid var(--rd10-ai-error); border-radius: 10px; background: #fff8f6; color: var(--rd10-ai-error); }

.rd10-ai-app__unavailable p { margin: 0; color: #6d4a46; font-size: 0.88rem; }

.rd10-ai-app__retry { justify-self: start; margin-top: 4px; padding: 7px 12px; background: transparent; color: var(--rd10-ai-error); font-size: 0.8rem; }

.rd10-ai-app__messages { display: flex; max-width: 900px; flex-direction: column; gap: 22px; margin: 0 auto; padding: 0; list-style: none; }

.rd10-ai-app__message { display: flex; min-width: 0; flex-direction: column; align-items: flex-start; }

.rd10-ai-app__message--user { align-items: flex-end; }

.rd10-ai-app__speaker { margin: 0 7px 6px; color: var(--rd10-ai-muted); font-size: 0.68rem; font-weight: 800; letter-spacing: 0.11em; text-transform: uppercase; }

.rd10-ai-app__message-text,
.rd10-ai-app__thinking { max-width: min(760px, 94%); margin: 0; padding: 14px 17px; border: 1px solid var(--rd10-ai-line); border-radius: 17px 17px 17px 5px; background: #fff; color: var(--rd10-ai-ink); font-size: 0.97rem; line-height: 1.62; overflow-wrap: anywhere; white-space: pre-wrap; }

.rd10-ai-app__message--user .rd10-ai-app__message-text { border-color: var(--rd10-ai-ink); border-radius: 17px 17px 5px; background: var(--rd10-ai-ink); color: #fff; }

.rd10-ai-app__message--error .rd10-ai-app__message-text { border-color: rgba(138, 52, 45, 0.28); background: #fff8f6; color: var(--rd10-ai-error); }

.rd10-ai-app__thinking { display: inline-flex; color: var(--rd10-ai-muted); font-size: 0.88rem; }

.rd10-ai-app__references { width: min(100%, 760px); margin-top: 9px; }

.rd10-ai-app__references-heading { margin: 0 0 6px; color: var(--rd10-ai-muted); font-size: 0.68rem; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase; }

.rd10-ai-app__project-reference-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 7px; }

.rd10-ai-app__project-reference { min-width: 0; padding: 9px 11px; border: 1px solid var(--rd10-ai-line); border-radius: 10px; background: rgba(255, 255, 255, 0.68); }

.rd10-ai-app__reference-category { font-size: 0.59rem; letter-spacing: 0.1em; }

.rd10-ai-app__reference-title { margin: 3px 0 0; font-size: 0.88rem; line-height: 1.25; overflow-wrap: anywhere; }

.rd10-ai-app__reference-link { text-decoration: none; }

.rd10-ai-app__reference-link:hover { text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 3px; }

.rd10-ai-app__link-reference-list { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 7px; }

.rd10-ai-app__link-reference { display: inline-flex; min-height: 34px; align-items: center; gap: 4px; padding: 6px 10px; border: 1px solid var(--rd10-ai-line); border-radius: 9px; background: #fff; font-size: 0.76rem; font-weight: 800; text-decoration: none; }

.rd10-ai-app__link-reference:hover { border-color: #999187; }

.rd10-ai-app__external-mark { font-size: 0.78rem; }

.rd10-ai-app__prompt-section { max-width: 900px; margin: 28px auto 0; }

.rd10-ai-app__prompt-heading { margin: 0 0 9px; color: var(--rd10-ai-muted); font-size: 0.72rem; font-weight: 800; letter-spacing: 0.1em; text-transform: uppercase; }

.rd10-ai-app__prompt-list { display: flex; flex-wrap: wrap; gap: 8px; }

.rd10-ai-app__prompt { max-width: 100%; min-height: 44px; padding: 8px 11px; border: 1px solid var(--rd10-ai-line); border-radius: 11px; background: #fff; color: var(--rd10-ai-ink); font-size: 0.79rem; font-weight: 700; line-height: 1.35; text-align: left; }

.rd10-ai-app__prompt:hover:not(:disabled) { border-color: #999187; background: var(--rd10-ai-soft); }

.rd10-ai-app__composer { flex: 0 0 auto; padding: 15px 21px 13px; border-top: 1px solid var(--rd10-ai-line); background: rgba(255, 255, 255, 0.78); }

.rd10-ai-app__input-label { display: block; margin-bottom: 7px; color: var(--rd10-ai-muted); font-size: 0.76rem; font-weight: 800; }

.rd10-ai-app__input { display: block; width: 100%; min-height: 65px; max-height: 148px; resize: none; overflow-y: auto; border: 1px solid #bdb5aa; border-radius: 13px; outline: 0; background: #fff; color: var(--rd10-ai-ink); font-size: 0.95rem; line-height: 1.45; padding: 12px 13px; }

.rd10-ai-app__input::placeholder { color: #686d70; }

.rd10-ai-app__composer-footer { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 8px; }

.rd10-ai-app__count { color: var(--rd10-ai-muted); font-size: 0.72rem; font-variant-numeric: tabular-nums; }

.rd10-ai-app__count--near-limit { color: var(--rd10-ai-error); font-weight: 800; }

.rd10-ai-app__send { min-width: 75px; padding: 8px 16px; background: var(--rd10-ai-ink); color: #fff; font-size: 0.82rem; }

.rd10-ai-app__send:hover:not(:disabled) { background: #343a3f; }

.rd10-ai-app__disclaimer { margin: 7px 0 0; color: var(--rd10-ai-muted); font-size: 0.67rem; line-height: 1.3; text-align: center; }

.rd10-ai-app__live-status { position: absolute; width: 1px; height: 1px; padding: 0; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

.rd10-ai-app__startup-error { max-width: 680px; margin: 20px auto; padding: 28px; border: 1px solid var(--rd10-ai-line); border-radius: 18px; background: #fff; }

.rd10-ai-app__startup-error h1 { margin: 0; font-size: 1.5rem; }

.rd10-ai-app__startup-error p { margin: 9px 0 0; color: var(--rd10-ai-muted); }

.rd10-ai-app__topbar-link:focus-visible,
.rd10-ai-page button:focus-visible,
.rd10-ai-page a:focus-visible,
.rd10-ai-page textarea:focus-visible,
.rd10-ai-app__conversation:focus-visible {
  outline: 3px solid var(--rd10-ai-focus);
  outline-offset: 3px;
}

.rd10-ai-page-footer { padding: 28px 24px 38px; color: var(--rd10-ai-muted); text-align: center; font-size: 0.82rem; }

.rd10-ai-page-footer a { font-weight: 800; }

@media (max-width: 900px) {
  .rd10-ai-app__intro { grid-template-columns: 1fr; gap: 22px; }
  .rd10-ai-app__intro-note { max-width: 560px; }
  .rd10-ai-app__workspace { grid-template-columns: minmax(190px, 0.4fr) minmax(0, 1fr); }
  .rd10-ai-app__welcome-grid { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .rd10-ai-topbar { min-height: 62px; padding: 11px 18px; }
  .rd10-ai-topbar__brand { font-size: 0.85rem; }
  .rd10-ai-topbar__back { min-height: 38px; padding: 6px 11px; font-size: 0.78rem; }
  .rd10-ai-page-main { width: min(100% - 28px, 1420px); padding: 28px 0 46px; }
  .rd10-ai-app { gap: 18px; }
  .rd10-ai-app__intro { padding-top: 10px; }
  .rd10-ai-app__title { font-size: clamp(2.25rem, 12vw, 3.9rem); }
  .rd10-ai-app__workspace { display: flex; height: auto; min-height: 0; flex-direction: column; }
  .rd10-ai-app__discovery { padding: 18px 14px; }
  .rd10-ai-app__discovery-header { padding-bottom: 12px; }
  .rd10-ai-app__discovery-list { display: flex; width: 100%; min-width: 0; max-width: 100%; gap: 7px; overflow-x: auto; overflow-y: hidden; padding: 2px 2px 4px; scrollbar-width: thin; }
  .rd10-ai-app__discovery-button { width: auto; min-width: max-content; min-height: 44px; flex: 0 0 auto; padding: 8px 10px; border-color: var(--rd10-ai-line); background: #fff; font-size: 0.78rem; }
  .rd10-ai-app__conversation-panel {
    height: min(760px, calc(100vh - 28px));
    height: min(760px, calc(100dvh - 28px));
    min-height: 650px;
    border-radius: 18px;
  }
  .rd10-ai-app__conversation-header { padding: 12px 15px; }
  .rd10-ai-app__conversation { padding: 22px 14px 26px; }
  .rd10-ai-app__composer { padding: 13px 14px 11px; }
  .rd10-ai-app__project-reference-grid { grid-template-columns: 1fr; }
  .rd10-ai-app__message-text, .rd10-ai-app__thinking { max-width: 100%; font-size: 0.92rem; }
}

@media (max-width: 390px) {
  .rd10-ai-topbar__brand { letter-spacing: 0.04em; }
  .rd10-ai-topbar__back { padding-inline: 9px; }
  .rd10-ai-app__conversation-title { font-size: 1rem; }
  .rd10-ai-app__reset { padding-inline: 10px; font-size: 0.76rem; }
  .rd10-ai-app__welcome-title { font-size: 1.75rem; }
}

@media (max-height: 620px) and (min-width: 681px) {
  .rd10-ai-page-main { padding-top: 24px; }
  .rd10-ai-app__intro { padding-top: 0; }
  .rd10-ai-app__title { font-size: clamp(2.2rem, 5vw, 3.8rem); }
  .rd10-ai-app__workspace { min-height: 560px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .rd10-ai-app__discovery-button { transition: none; }
}