/* essay.css — dark three-column agent chat workspace */

:root {
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

/* WebGL generative background (essay-bg.js) + faint ng-pattern overlay.
   Both sit behind .wr-app-shell (z-index 1). If the WebGL canvas fails to
   initialise, the static ng-pattern on body::before remains as the fallback. */
#essay-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  display: block;
  pointer-events: none;
}
.wr-bg-pattern {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.10;
  background-image: url('../img/ng-pattern.svg');
  background-repeat: repeat;
  background-size: 560px 560px;
  background-position: center top;
  filter: invert(0.92) hue-rotate(180deg);
}

body.wr-page {
  --wr-ink: #ece8de;
  --wr-ink-soft: #b8b0a3;
  --wr-ink-muted: #7f786d;
  --wr-dark: #0e1014;
  --wr-dark-elevated: #161920;
  --wr-panel: rgba(255, 255, 255, 0.045);
  --wr-panel-soft: rgba(255, 255, 255, 0.030);
  --wr-line: rgba(255, 255, 255, 0.08);
  --wr-line-strong: rgba(255, 255, 255, 0.16);
  --wr-green: #7c9c72;
  --wr-green-soft: #9bb88f;
  --wr-shadow: rgba(0, 0, 0, 0.45);

  min-height: 100vh;
  position: relative;
  background-color: var(--wr-dark);
  color: var(--wr-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow: hidden;
}

body.wr-page::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image: url('../img/ng-pattern.svg');
  background-repeat: repeat;
  background-size: 560px 560px;
  background-position: center top;
  filter: invert(0.92) hue-rotate(180deg);
  opacity: 0.35;
}

body.wr-page::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(14, 16, 20, 0.86), rgba(14, 16, 20, 0.92)),
    radial-gradient(120% 100% at 20% 0%, rgba(124, 156, 114, 0.08), transparent 58%),
    radial-gradient(120% 100% at 100% 20%, rgba(255, 255, 255, 0.04), transparent 52%);
}

a { color: var(--wr-green-soft); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
button { font: inherit; }

.wr-app-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr) 320px;
  min-height: 100vh;
}

.wr-sidebar,
.wr-main,
.wr-timeline {
  min-height: 100vh;
}

.wr-sidebar {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px 16px;
  border-right: 1px solid var(--wr-line);
  background: rgba(22, 25, 32, 0.72);
}

.wr-brand__home {
  font-family: var(--font-display);
  font-size: 22px;
  color: var(--wr-ink);
}
.wr-brand__home:hover { text-decoration: none; opacity: 0.72; }

.wr-sidebar-head {
  display: flex;
  align-items: center;
  gap: 10px;
}
.wr-back {
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--wr-panel);
  border: 1px solid var(--wr-line);
  color: var(--wr-ink);
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.wr-back:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: var(--wr-line-strong);
  text-decoration: none;
}
.wr-back svg { width: 18px; height: 18px; }

.wr-nav__item,
.wr-audio-toggle {
  width: 100%;
  border: 1px solid var(--wr-line);
  background: var(--wr-panel);
  color: var(--wr-ink);
  border-radius: 14px;
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.wr-nav__item:hover,
.wr-audio-toggle:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: var(--wr-line-strong);
  transform: translateY(-1px);
}

.wr-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.wr-nav__item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  text-align: left;
  cursor: pointer;
}
.wr-nav__item.is-active {
  background: rgba(124, 156, 114, 0.12);
  border-color: rgba(124, 156, 114, 0.28);
}
.wr-nav__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--wr-green-soft);
  flex: 0 0 8px;
}

.wr-sidebar-foot {
  margin-top: auto;
}

.wr-audio-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 12px 14px;
  cursor: pointer;
}
.wr-audio-toggle svg { width: 18px; height: 18px; }
.wr-audio-toggle.is-muted { color: var(--wr-ink-muted); }

/* Bottom-left download card for the WeChat-migration skill package */
.wr-skill-download {
  margin-top: 12px;
  padding: 12px 13px;
  border: 1px solid var(--wr-line);
  border-radius: 14px;
  background: var(--wr-panel-soft);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.wr-skill-download__label {
  margin: 0;
  font-family: var(--font-label);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--wr-green-soft);
}
.wr-skill-download__desc {
  margin: 0;
  font-size: 11.5px;
  line-height: 1.55;
  color: var(--wr-ink-soft);
}
.wr-skill-download__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 12px;
  border-radius: 10px;
  border: 1px solid rgba(124, 156, 114, 0.34);
  background: linear-gradient(160deg, rgba(124, 156, 114, 0.20), rgba(124, 156, 114, 0.08));
  color: var(--wr-ink);
  font-family: var(--font-label);
  font-size: 11.5px;
  letter-spacing: 0.02em;
  transition: background var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.wr-skill-download__btn:hover {
  background: rgba(124, 156, 114, 0.26);
  border-color: rgba(124, 156, 114, 0.5);
  text-decoration: none;
  transform: translateY(-1px);
}
.wr-skill-download__btn svg { width: 15px; height: 15px; flex: 0 0 15px; }

.wr-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

.wr-mainbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 22px 9px;
  border-bottom: 1px solid var(--wr-line);
}
.wr-mainbar__eyebrow,
.wr-timeline__eyebrow {
  margin: 0;
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--wr-ink-muted);
}

.wr-status {
  margin: 10px 22px 0;
  color: #d48a7a;
  font-family: var(--font-label);
  font-size: 12px;
}

.wr-chatbox {
  flex: 1;
  min-height: 0;
  position: relative;
}

.wr-chat-scroll {
  position: absolute;
  inset: 0;
  overflow: auto;
  padding: 14px 22px 16px;
  scroll-behavior: smooth;
}

.wr-agent-stream {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.wr-agent-msg {
  display: flex;
  gap: 11px;
  align-items: flex-start;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.34s var(--ease), transform 0.34s var(--ease);
}
.wr-agent-msg.in {
  opacity: 1;
  transform: translateY(0);
}

.wr-agent-avatar {
  flex: 0 0 32px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(150deg, var(--wr-green), var(--wr-green-soft));
  color: #0e1014;
  border: 1px solid rgba(124, 156, 114, 0.35);
}
.wr-agent-avatar svg { width: 18px; height: 18px; }
.wr-agent-avatar--mini { width: 28px; height: 28px; flex-basis: 28px; }
.wr-agent-avatar--mini svg { width: 14px; height: 14px; }

.wr-agent-bubble {
  flex: 1;
  min-width: 0;
  padding: 12px 15px;
  border-radius: 8px 14px 14px 14px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.09), rgba(255,255,255,0.04) 40%),
    linear-gradient(160deg, rgba(30, 34, 42, 0.92), rgba(18, 21, 26, 0.96));
  border: 1px solid var(--wr-line);
  box-shadow: 0 8px 20px -14px var(--wr-shadow);
  font-size: 14px;
  position: relative;
  overflow: hidden;
}
.wr-agent-bubble::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('../img/ng-pattern.svg');
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  filter: invert(1) brightness(1.28) contrast(0.9);
  opacity: 0.07;
  pointer-events: none;
}
.wr-agent-bubble > * {
  position: relative;
  z-index: 1;
}
.wr-agent-bubble__name {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-label);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--wr-ink-muted);
}
.wr-agent-bubble p { margin: 0 0 8px; }
.wr-agent-bubble p:last-child { margin-bottom: 0; }

/* overview intro — structured, scannable summary */
.wr-agent-lead {
  font-size: 13px;
  line-height: 1.62;
  color: var(--wr-ink-soft);
}
.wr-agent-lead + .wr-agent-lead { margin-top: 4px; }
.wr-agent-key {
  color: var(--wr-ink);
  font-weight: 650;
}
.wr-agent-question {
  margin: 0 0 10px;
  padding: 10px 13px;
  border-left: 2px solid var(--wr-green);
  border-radius: 0 8px 8px 0;
  background: rgba(124, 156, 114, 0.08);
  font-family: var(--font-display);
  font-size: 15px;
  line-height: 1.5;
  color: var(--wr-ink);
}
.wr-agent-list {
  margin: 2px 0 10px;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 5px;
}
.wr-agent-list li {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--wr-ink-soft);
}
.wr-agent-list li::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 8px;
  width: 5px;
  height: 5px;
  border-radius: 1.5px;
  background: var(--wr-green);
  transform: rotate(45deg);
}

.wr-agent-caret {
  display: inline-block;
  width: 2px;
  height: 1.05em;
  margin-left: 1px;
  vertical-align: text-bottom;
  background: var(--wr-green);
  animation: wr-blink 1s steps(2, start) infinite;
}
@keyframes wr-blink { 0%, 50% { opacity: 1; } 50.01%, 100% { opacity: 0; } }

.wr-agent-typing {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
  opacity: 0;
  transition: opacity 0.24s var(--ease);
}
.wr-agent-typing.show { opacity: 1; }
.wr-agent-typing__dots {
  display: inline-flex;
  gap: 5px;
  padding: 12px 16px;
  background: var(--wr-panel);
  border: 1px solid var(--wr-line);
  border-radius: 8px 16px 16px 16px;
}
.wr-agent-typing__dots i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--wr-green);
  opacity: 0.45;
  animation: wr-bounce 1.2s infinite ease-in-out;
}
.wr-agent-typing__dots i:nth-child(2) { animation-delay: 0.18s; }
.wr-agent-typing__dots i:nth-child(3) { animation-delay: 0.36s; }
@keyframes wr-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.45; }
  30% { transform: translateY(-5px); opacity: 0.92; }
}

.wr-agent-cards-intro {
  margin: 0 0 8px;
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--wr-ink-muted);
}

.wr-agent-group + .wr-agent-group {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--wr-line);
}
.wr-agent-group__desc {
  margin: 0 0 12px;
  color: var(--wr-ink-soft);
  font-size: 14px;
  line-height: 1.7;
}

.wr-agent-cards {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}
.wr-agent-card {
  display: flex;
  flex-direction: column;
  width: 100%;
  color: inherit;
  background: var(--wr-panel);
  border: 1px solid var(--wr-line);
  border-radius: 10px;
  overflow: hidden;
  position: relative;
  transition: transform var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease), box-shadow var(--t-fast) var(--ease);
}
.wr-agent-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url('../img/ng-pattern.svg');
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  filter: invert(1) brightness(1.28) contrast(0.9);
  opacity: 0.42;
  pointer-events: none;
  z-index: 0;
}
.wr-agent-card:hover {
  transform: translateY(-2px);
  border-color: var(--wr-line-strong);
  box-shadow: 0 12px 26px -14px var(--wr-shadow);
  text-decoration: none;
}
.wr-agent-card__cover {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: rgba(124, 156, 114, 0.10);
}
.wr-agent-card__body {
  position: relative;
  z-index: 1;
  padding: 6px 7px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex: 1;
}
.wr-agent-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 11px;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.wr-agent-card__summary {
  display: none;
}
.wr-agent-card__meta {
  margin: 0;
  font-family: var(--font-label);
  font-size: 9px;
  color: var(--wr-ink-muted);
}
.wr-agent-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 3px;
  margin-top: auto;
}
.wr-agent-card__tag {
  font-family: var(--font-label);
  font-size: 8px;
  color: var(--wr-ink-soft);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--wr-line);
  border-radius: 999px;
  padding: 1px 5px;
}

.wr-agent-article {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--wr-line);
}
.wr-agent-article p + p { margin-top: 12px; }

.wr-timeline {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px 18px;
  border-left: 1px solid var(--wr-line);
  background: rgba(22, 25, 32, 0.68);
  overflow: auto;
}
.wr-timeline__head { margin-bottom: 2px; }
.wr-timeline__title {
  margin: 4px 0 6px;
  font-family: var(--font-display);
  font-size: 22px;
  line-height: 1.12;
}
.wr-timeline__desc {
  margin: 0;
  color: var(--wr-ink-soft);
  font-size: 12.5px;
  line-height: 1.5;
}
.wr-timeline__track {
  position: relative;
  padding-left: 2px;
}
.wr-timeline__track::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 9px;
  bottom: 10px;
  width: 1px;
  background: var(--wr-line-strong);
}
.wr-timeline-item {
  position: relative;
  padding: 0 0 13px 22px;
  border-radius: 8px;
  transition: background var(--t-fast) var(--ease);
}
.wr-timeline-item:last-child { padding-bottom: 2px; }
.wr-timeline-item__marker {
  position: absolute;
  left: 3px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--wr-green);
  border: 2px solid var(--wr-dark);
  box-shadow: 0 0 0 1px rgba(124, 156, 114, 0.35);
  transition: background var(--t-fast) var(--ease);
}
.wr-timeline-item__time {
  margin: 0 0 2px;
  font-family: var(--font-label);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--wr-ink-muted);
}
.wr-timeline-item__role {
  margin: 0;
  font-family: var(--font-display);
  font-size: 14px;
  line-height: 1.32;
  color: var(--wr-ink);
}
.wr-timeline-item__company {
  margin: 1px 0 4px;
  font-size: 12px;
  color: var(--wr-ink-soft);
}
.wr-timeline-item__desc {
  margin: 0;
  font-size: 12px;
  line-height: 1.5;
  color: var(--wr-ink-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.wr-timeline-item:hover { background: rgba(255, 255, 255, 0.03); }
.wr-timeline-item:hover .wr-timeline-item__marker { background: var(--wr-green-soft); }

@media (max-width: 1180px) {
  .wr-app-shell {
    grid-template-columns: 220px minmax(0, 1fr) 280px;
  }
  .wr-agent-cards {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 980px) {
  body.wr-page { overflow-y: auto; }
  .wr-app-shell {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  .wr-sidebar,
  .wr-main,
  .wr-timeline {
    min-height: auto;
  }
  .wr-sidebar,
  .wr-timeline {
    border: 0;
  }
  .wr-sidebar {
    padding-bottom: 10px;
  }
  .wr-mainbar,
  .wr-timeline {
    padding-left: 18px;
    padding-right: 18px;
  }
  .wr-agent-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .wr-chatbox {
    flex: none;
    position: static;
    min-height: 50vh;
  }
  .wr-chat-scroll {
    position: static;
    overflow: visible;
    padding: 14px 18px;
  }
}

@media (max-width: 760px) {
  .wr-mainbar {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 620px) {
  .wr-agent-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .wr-chat-scroll { scroll-behavior: auto; }
  .wr-agent-msg,
  .wr-agent-typing,
  .wr-agent-caret,
  .wr-agent-typing__dots i,
  .wr-nav__item,
  .wr-audio-toggle,
  .wr-agent-card {
    animation: none !important;
    transition: none !important;
  }
  .wr-agent-msg { transform: none; opacity: 1; }
}