/* Browser and chat are sibling flex columns; no desktop overlay or fake spacer. */
:root { --browser-panel-w: 50vw; }
body.browser-panel-open #main {
  --content-w: min(860px, 100%);
  position: relative; flex: 1 1 0; width: auto; min-width: 0;
  padding-right: 0; overflow: hidden; height: 100dvh; transition: none;
}
body.browser-panel-open #main .input-outer,
body.browser-panel-open #main #model-bar { max-width: min(860px, 100%); min-width: 0; }
body.browser-panel-open #main #input-wrap { padding-right: 16px; padding-left: 16px; }
body.browser-panel-open #main #input-footer { padding-right: 16px; padding-left: 16px; }
body.browser-panel-open #main #model-bar { flex-wrap: wrap; }
body.browser-panel-open #main .model-bar-hint { min-width: 0; white-space: normal; }
body.browser-panel-open #main #chat-box { min-height: 0; overflow-x: hidden; }
body.browser-panel-open #main:not(.welcome-mode) #chat-box { margin-top: 48px; padding-top: 0; }
body.browser-panel-open #main #welcome { max-width: 100%; padding-left: 16px; padding-right: 16px; }
body.browser-panel-open #main #welcome h1 { font-size: clamp(26px, 3vw, 36px); overflow-wrap: anywhere; }
body.browser-panel-open #main #private-banner {
  position: absolute; left: calc((100% - 84px) / 2); max-width: calc(100% - 104px);
  padding: 6px 9px; font-size: 10px; overflow: hidden; text-overflow: ellipsis;
}
body.browser-panel-open #scroll-to-bottom { position: fixed; left: var(--browser-chat-center); }
#browser-panel[hidden], #browser-panel [hidden] { display: none !important; }
#browser-panel {
  --browser-paper: #FCFCFB; --browser-paper2: #F8F8F6;
  --browser-ink: #1A1A18; --browser-ink2: #5C5C58; --browser-ink3: #9A9A95;
  --browser-rule: #E8E8E4; --browser-live: #2F6F6A;
  --browser-hover: rgba(0,0,0,.035); --browser-active: rgba(47,111,106,.08);
  position: relative; flex: 0 0 var(--browser-panel-w); width: var(--browser-panel-w);
  min-width: 0; height: 100dvh; display: flex; flex-direction: column; align-self: stretch;
  color: var(--browser-ink); background: var(--browser-paper); border-left: 1px solid var(--browser-rule);
  box-shadow: none; font-size: 13px; z-index: 1;
}
#browser-panel button, #browser-panel input, #browser-panel textarea { font: inherit; }
#browser-panel button {
  cursor: pointer; border: 1px solid var(--browser-rule); border-radius: 7px;
  background: transparent; color: var(--browser-ink2); padding: 6px 10px; line-height: 1.45;
}
#browser-panel button:hover:not(:disabled) { color: var(--browser-ink); background: var(--browser-hover); }
#browser-panel button:disabled { opacity: .4; cursor: default; }
#browser-panel button:focus-visible, #browser-panel input:focus-visible,
#browser-frame:focus-visible, #browser-resize:focus-visible { outline: 2px solid var(--browser-live); outline-offset: 2px; }
#browser-panel .browser-primary { background: var(--browser-paper2); color: var(--browser-ink); font-weight: 600; white-space: nowrap; }
#browser-panel .browser-primary:hover:not(:disabled) { background: var(--browser-hover); color: var(--browser-ink); }
#browser-panel #browser-start { background: var(--browser-ink); color: var(--browser-paper); border-color: var(--browser-ink); padding: 8px 15px; }
#browser-panel #browser-start:hover:not(:disabled) { opacity: .85; }
.browser-heading { min-height: 48px; display: flex; align-items: center; gap: 4px; padding: 8px 12px; border-bottom: 1px solid var(--browser-rule); flex-shrink: 0; }
.browser-heading-title { display: flex; align-items: center; flex: 1; gap: 7px; min-width: 0; }
.browser-heading-title strong { font-size: 13px; font-weight: 600; white-space: nowrap; }
#browser-live-state { font-size: 10px; color: var(--browser-ink3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.browser-live-dot { width: 6px; height: 6px; flex-shrink: 0; border-radius: 50%; background: var(--browser-ink3); }
.has-session .browser-live-dot { background: var(--browser-live); }
#browser-panel .browser-icon { width: 28px; height: 28px; padding: 0; border: none; display: inline-flex; align-items: center; justify-content: center; font-size: 20px; flex-shrink: 0; background: transparent; }
#browser-panel .browser-return { display: none; border: none; padding: 4px 8px 4px 0; white-space: nowrap; font-size: 12px; }
.browser-tabs-row { display: flex; align-items: center; gap: 3px; padding: 5px 8px 0; flex-shrink: 0; min-width: 0; }
.browser-tabs { display: flex; flex: 1; min-width: 0; gap: 3px; overflow-x: auto; scrollbar-width: thin; }
.browser-tab { display: flex; align-items: center; flex: 1 0 90px; min-width: 0; max-width: 180px; border: 1px solid transparent; border-radius: 7px; }
.browser-tab.is-active { border-color: var(--browser-rule); background: var(--browser-paper2); }
#browser-panel .browser-tab-select { flex: 1; min-width: 0; padding: 5px 7px; border: none; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; text-align: left; font-size: 11px; }
.browser-tab.is-active .browser-tab-select { color: var(--browser-ink); }
#browser-panel .browser-tab-close { flex: 0 0 22px; width: 22px; height: 24px; padding: 0; border: none; margin-right: 2px; font-size: 15px; }
.browser-navigation { display: flex; align-items: center; gap: 3px; padding: 9px 10px; flex-shrink: 0; }
#browser-address { min-width: 0; flex: 1; background: var(--browser-paper2); border: 1px solid var(--browser-rule); border-radius: 7px; padding: 6px 8px; color: var(--browser-ink); height: 32px; font-size: 12px; }
#browser-address:disabled { color: var(--browser-ink2); opacity: 1; }
#browser-address::placeholder { color: var(--browser-ink3); }
#browser-go { flex-shrink: 0; font-size: 12px !important; }
.browser-control-row { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 0 12px 9px; flex-shrink: 0; }
.browser-control-row > div { display: flex; align-items: center; min-width: 0; gap: 7px; }
.browser-mode { display: inline-block; border-radius: 4px; padding: 3px 6px; font-size: 10px; white-space: nowrap; color: var(--browser-ink2); background: var(--browser-paper2); }
.is-manual .browser-mode { background: var(--browser-active); color: var(--browser-live); }
#browser-page-title { color: var(--browser-ink3); font-size: 10px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#browser-control { font-size: 11px !important; padding: 5px 9px !important; }
#browser-message { padding: 8px 12px; background: var(--browser-paper2); color: var(--browser-ink2); font-size: 12px; border-top: 1px solid var(--browser-rule); flex-shrink: 0; }
#browser-message.is-error { background: #fff2ed; color: #9b4528; }
.browser-page-request { padding: 10px 12px; border-top: 1px solid var(--browser-rule); background: var(--browser-paper2); flex-shrink: 0; min-width: 0; max-height: 45dvh; overflow: auto; }
.browser-request-heading { display: flex; align-items: baseline; gap: 8px; min-width: 0; }
.browser-request-heading strong { font-size: 12px; font-weight: 600; white-space: nowrap; }
.browser-request-heading > span { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--browser-ink3); font-size: 10px; }
.browser-page-request p { margin: 7px 0; max-height: min(140px, 18dvh); overflow: auto; font-size: 12px; line-height: 1.7; color: var(--browser-ink2); white-space: pre-wrap; overflow-wrap: anywhere; }
#browser-dialog-prompt-label { display: block; color: var(--browser-ink2); font-size: 11px; }
#browser-dialog-prompt { display: block; width: 100%; min-width: 0; margin: 5px 0 8px; padding: 6px 8px; border: 1px solid var(--browser-rule); border-radius: 6px; background: var(--browser-paper); color: var(--browser-ink); }
.browser-request-actions { display: flex; align-items: center; justify-content: flex-end; gap: 6px; flex-wrap: wrap; }
#browser-panel .browser-request-actions button { font-size: 11px; padding: 5px 9px; }
#browser-dialog-help { flex: 1 1 110px; font-size: 10px; line-height: 1.6; color: var(--browser-ink2); }
#browser-stage { min-height: 0; flex: 1 1 0; position: relative; display: flex; align-items: flex-start; justify-content: center; overflow: auto; background: #F1F2F1; border-top: 1px solid var(--browser-rule); }
#browser-frame { display: block; width: 100%; height: auto; flex: 0 0 auto; user-select: none; -webkit-user-drag: none; background: #fff; }
.is-native-browser #browser-stage { overflow: hidden; align-items: stretch; }
#browser-native-viewer { display: block; border: 0; width: 100%; height: 100%; min-width: 0; min-height: 0; flex: 1 1 0; background: #fff; }
.is-native-browser .browser-control-row { padding-top: 9px; }
.is-native-browser .browser-footer { flex-wrap: wrap; }
body.browser-panel-resizing #browser-native-viewer { pointer-events: none; }
.is-manual #browser-frame { cursor: default; }
#browser-keyboard { position: absolute; left: 8px; top: 8px; width: 1px; height: 1px; padding: 0; opacity: .01; border: 0; resize: none; overflow: hidden; pointer-events: none; }
#browser-empty { text-align: center; width: 100%; max-width: 330px; padding: 32px 20px; align-self: center; margin: auto; }
.browser-empty-icon { display: flex; align-items: center; justify-content: center; width: 46px; height: 46px; margin: 0 auto 16px; background: var(--browser-paper); border: 1px solid var(--browser-rule); border-radius: 12px; color: var(--browser-ink2); font-size: 27px; }
#browser-empty h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
#browser-empty p { color: var(--browser-ink2); font-size: 12px; line-height: 1.85; margin-bottom: 18px; }
.browser-input-help { padding: 8px 12px; color: var(--browser-ink2); background: var(--browser-paper2); font-size: 10px; border-top: 1px solid var(--browser-rule); flex-shrink: 0; }
.browser-footer { display: flex; align-items: flex-start; gap: 8px; padding: 8px 12px; border-top: 1px solid var(--browser-rule); flex-shrink: 0; min-height: 44px; }
#browser-downloads { flex: 1; min-width: 0; }
#browser-downloads summary { cursor: pointer; color: var(--browser-ink2); padding: 4px 0; font-size: 12px; }
#browser-download-count { display: inline-block; padding: 0 4px; margin-left: 3px; border-radius: 4px; background: var(--browser-paper2); color: var(--browser-ink3); }
#browser-download-list { max-height: min(150px, 20dvh); overflow: auto; padding-top: 4px; }
#browser-download-list p { color: var(--browser-ink3); font-size: 11px; padding: 5px 0; }
#browser-panel .browser-download-file { display: block; border: none; padding: 6px 0; max-width: 100%; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; color: var(--browser-ink2); text-align: left; }
#browser-panel .browser-text-button { border: none; background: none; color: var(--browser-ink3); white-space: nowrap; font-size: 11px; }
#browser-resize { position: absolute; inset: 0 auto 0 -4px; width: 8px; cursor: col-resize; touch-action: none; z-index: 2; }
#browser-resize::after { content: ''; position: absolute; top: calc(50% - 20px); left: 3px; width: 2px; height: 40px; border-radius: 2px; background: var(--browser-rule); }
#browser-resize:hover::after { background: var(--browser-ink3); }
body.browser-panel-resizing { cursor: col-resize; user-select: none; }
body.browser-panel-resizing #main, body.browser-panel-resizing #sidebar { transition: none; }
body.private-active #browser-panel {
  --browser-paper: #14121C; --browser-paper2: #1A1725;
  --browser-ink: #ECE9F5; --browser-ink2: #A7A2B8; --browser-ink3: #6E6980;
  --browser-rule: rgba(167,139,250,.14); --browser-live: #6FB3AC;
  --browser-hover: rgba(255,255,255,.045); --browser-active: rgba(111,179,172,.10);
}
body.private-active #browser-stage { background: #100F16; }
body.private-active #browser-message.is-error { background: #3b2824; color: #ffba9e; }
/* A small viewport shows one page at a time. The hidden chat cannot receive
   clicks or keyboard focus; returning removes only our temporary layout class. */
body.browser-single-page #main,
body.browser-single-page #sidebar,
body.browser-single-page #sidebar-open-btn,
body.browser-single-page #scroll-to-bottom,
body.browser-single-page #sidebar-backdrop { display: none !important; }
body.browser-single-page #browser-panel { flex: 1 1 100%; width: 100%; border-left: none; }
body.browser-single-page #browser-return { display: inline-flex; }
body.browser-single-page #browser-resize,
body.browser-single-page #browser-wide { display: none; }
body.browser-single-page #browser-live-state { display: none; }
@media (max-height: 520px) {
  #browser-empty { padding-top: 12px; padding-bottom: 12px; }
  .browser-empty-icon { display: none; }
  .browser-input-help { display: none; }
}