/* Shared geometry and components. Palettes live in themes.css; feature pages do
   not change their layout when a theme changes. */
:root {
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  font-size: 16px;
}
.site-document { margin: 0; min-width: 0; min-height: 100dvh; background: var(--bg); color: var(--text); }
.site-shell { display: grid; grid-template-columns: 196px minmax(0, 1fr); min-height: 100dvh; }
.site-sidebar { position: sticky; top: 0; height: 100dvh; display: flex; flex-direction: column; gap: 1.9rem; min-width: 0; overflow-y: auto; padding: 1.9rem .875rem 1rem; background: var(--nav-bg); border-right: 1px solid var(--line); scrollbar-width: thin; scrollbar-color: var(--line) transparent; }
.site-brand { display: inline-flex; align-items: center; gap: .65rem; color: var(--text); text-decoration: none; font-size: 1.45rem; line-height: 1.3; font-weight: 800; letter-spacing: -.075em; padding: 0 .75rem; min-height: 2.5rem; flex-shrink: 0; }
.brand-symbol { position: relative; width: 1.75rem; height: 1.75rem; border: .4375rem solid var(--accent); border-radius: 50%; flex: 0 0 1.75rem; }
.brand-symbol::after { content: ""; position: absolute; right: -.5625rem; bottom: -.4375rem; width: .625rem; height: .625rem; background: var(--accent); border: .1875rem solid var(--nav-bg); border-radius: .125rem; }
.site-nav { display: flex; flex-direction: column; gap: .35rem; min-width: 0; }
.site-nav-link { display: flex; align-items: center; gap: .75rem; min-height: 2.875rem; padding: .6rem .875rem; border-radius: .5rem; color: var(--muted); text-decoration: none; font-size: .875rem; font-weight: 550; min-width: 0; }
.site-nav-link svg { width: 1.25rem; height: 1.25rem; flex: 0 0 1.25rem; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.site-icon { width: 1.25rem; height: 1.25rem; flex-shrink: 0; }
.site-nav-link .nav-label { min-width: 0; overflow-wrap: anywhere; }
.site-nav-link:hover { background: var(--hover); color: var(--text); }
.site-nav-link[aria-current] { background: var(--hover); color: var(--accent); }
.site-account { margin-top: auto; border-top: 1px solid var(--line); padding-top: 1rem; display: flex; flex-direction: column; gap: .65rem; font-size: .8rem; min-width: 0; }
.site-account-identity { display: flex; align-items: center; gap: .55rem; min-width: 0; padding: .25rem .75rem; text-decoration: none; color: var(--text); }
.site-account-identity > div { min-width: 0; }
.site-account-avatar { position: relative; display: grid; place-items: center; width: 2rem; height: 2rem; flex: 0 0 2rem; border-radius: .65rem; background: var(--raised); color: var(--accent); }
.site-account-avatar img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; border-radius: inherit; }
.site-account-avatar img:not([hidden]) ~ .site-icon { visibility: hidden; }
.site-account-name { display: block; font-size: .875rem; font-weight: 650; overflow-wrap: anywhere; }
.site-account-id { display: block; font-size: .65rem; color: var(--muted); overflow-wrap: anywhere; font-variant-numeric: tabular-nums; }
.site-account-links { display: flex; flex-direction: column; gap: .25rem; }
.site-account-links > a, .site-account-links button { display: flex; align-items: center; gap: .75rem; width: 100%; min-height: 2.5rem; padding: .5rem .75rem; text-align: left; font-size: .8rem; font-weight: 500; color: var(--muted); background: transparent; border: 0; border-radius: .5rem; text-decoration: none; }
.site-account-links > a:hover, .site-account-links button:hover { background: var(--hover); color: var(--text); }
.site-account-links > a[aria-current] { color: var(--accent); background: var(--hover); }
.site-account form { margin: 0; }
.site-signout { padding: 0 .75rem; }
.site-signout button { min-height: 2.5rem; font-size: .8rem; color: var(--muted); }
.site-guest-actions { display: flex; flex-direction: column; gap: .9rem; text-align: center; padding: .5rem .75rem; }
.site-guest-actions .button-link { font-size: .85rem; }
.site-theme-picker { display: block; margin: .15rem .75rem; color: var(--muted); font-size: .7rem; font-weight: 500; }
.site-theme-picker select { margin-top: .35rem; padding: .5rem .6rem; min-height: 2.5rem; border: 1px solid var(--line); border-radius: .5rem; background: var(--surface); color: var(--text); font-size: .8rem; }
.site-workspace { display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.site-content { flex: 1; min-width: 0; width: 100%; max-width: 88rem; padding: 2.5rem 3rem 3.5rem; }
.site-content > :first-child { min-width: 0; }
.site-footer { color: var(--muted); border-top: 1px solid var(--line); padding: 1rem 3rem; font-size: .75rem; }
.site-footer p { margin: 0; }
.site-attention { flex-shrink: 0; display: flex; justify-content: flex-end; padding: .75rem 3rem 0; }
.site-attention:empty { display: none; }
.site-mobile-header, .site-mobile-tabs, .site-mobile-nav { display: none; }
.chatrooms-heading { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.chatrooms-heading-actions { display: flex; align-items: center; gap: .25rem; flex-shrink: 0; }
.site-attention-compact { position: relative; display: block; padding: 0; }
.site-attention-symbol { position: absolute; inset: 0; z-index: 1; display: grid; place-items: center; pointer-events: none; color: var(--muted); }
.site-attention-symbol .site-icon { width: 1.375rem; height: 1.375rem; }
.site-attention-compact .dm-global-attention .dm-notifications > summary { display: flex; align-items: center; justify-content: center; width: 2.75rem; height: 2.75rem; font-size: 0; border-radius: .5rem; text-decoration: none; }
.site-attention-compact .dm-global-attention .dm-notifications > summary:hover { background: var(--hover); }
.site-attention-compact [data-notification-count]:not(:empty) { position: absolute; top: 0; right: 0; z-index: 2; margin: 0; }
.site-attention-compact .dm-global-notification-content { top: 3rem; }
.site-document :where(a, button, input, select, textarea, summary):focus-visible { outline: 2px solid var(--focus); outline-offset: 3px; }
.site-document :where(button, .button-link, summary) { touch-action: manipulation; }
.site-document :where(input, select, textarea) { accent-color: var(--accent); }
.site-document :where(input, textarea)::placeholder { color: var(--muted); opacity: 1; }
.site-document :where(input, select, textarea)[aria-invalid="true"] { border-color: var(--danger); }
.site-document :where(input, select, textarea):disabled { opacity: .65; cursor: not-allowed; }
.site-document .error-summary { background: var(--danger-bg); }
.site-document .button-secondary:hover { background: var(--hover); }
.site-document .button-danger:hover { outline: 1px solid var(--danger); }
.site-document dialog { background: var(--surface); color: var(--text); border-color: var(--line); box-shadow: var(--shadow); }
.site-document dialog::backdrop { background: var(--overlay); }
.site-document .eyebrow { color: var(--muted); font-size: .7rem; letter-spacing: .11em; }
.site-document .social-tabs [aria-current] { background: var(--hover); color: var(--accent); }
.site-document .empty-state { background: var(--surface); }
.site-document .page-heading { gap: 1rem; }
.settings-navigation { display: flex; flex-wrap: wrap; gap: .35rem; margin: 0 0 2rem; padding: 0 0 .75rem; border-bottom: 1px solid var(--line); }
.settings-navigation a { display: inline-flex; align-items: center; min-height: 2.75rem; padding: .6rem .8rem; border-radius: .45rem; text-decoration: none; color: var(--muted); font-size: .875rem; }
.settings-navigation a:hover { color: var(--text); background: var(--hover); }
.settings-navigation a[aria-current] { color: var(--accent); background: var(--hover); }

/* Signed-in home is a small set of real destinations. A full social dashboard
   is a separate composition, not fabricated data in this shell release. */
.home-page { width: 100%; max-width: 70rem; }
.home-heading { max-width: 42rem; margin-bottom: 2rem; }
.home-heading h1 { margin-bottom: .75rem; }
.home-heading p { color: var(--muted); }
.home-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr)); gap: 1rem; }
.home-destination { display: flex; flex-direction: column; gap: .6rem; padding: 1.4rem; min-width: 0; min-height: 9rem; border: 1px solid var(--line); border-radius: .75rem; background: var(--surface); text-decoration: none; color: var(--text); }
.home-destination:hover { border-color: var(--accent); background: var(--raised); }
.home-destination h2 { margin: 0; font-size: 1.1rem; }
.home-destination p { margin: 0; color: var(--muted); font-size: .875rem; }
.home-destination svg { width: 1.4rem; height: 1.4rem; color: var(--accent); fill: none; stroke: currentColor; stroke-width: 1.7; }

/* The shell supplies the available viewport. Message history remains the chat
   scroller; changing a theme never replaces or resizes message/video nodes. */
.layout-chat { height: 100dvh; overflow: hidden; }
.layout-chat .site-shell { height: 100%; min-height: 0; }
.layout-chat .site-content { display: flex; flex-direction: column; max-width: none; padding: 0; min-height: 0; overflow: hidden; }
.layout-chat .site-content > .dm-app { flex: 1; align-self: stretch; min-height: 0; width: 100%; }
.layout-chat .site-footer { display: none; }
.layout-chat .site-attention { padding: .5rem 1rem; border-bottom: 1px solid var(--line); }
.layout-chat .dm-global-notification-content { top: 1.8rem; }

@media (min-width: 761px) and (max-width: 1120px) {
  .site-shell { grid-template-columns: 166px minmax(0, 1fr); }
  .site-sidebar { padding-inline: .625rem; }
  .site-nav-link { padding-inline: .625rem; gap: .625rem; }
  .site-content { padding: 1.875rem; }
  .site-footer { padding-inline: 1.875rem; }
  .site-attention { padding-right: 1.875rem; }
  .layout-chat .dm-app:not(.room-app) { grid-template-columns: 210px minmax(0, 1fr); }
}

@media (max-width: 760px) {
  .site-shell { grid-template-columns: minmax(0, 1fr); }
  .site-sidebar { display: none; }
  /* Reserve the fixed tab bar in both scrolling documents and viewport chats. */
  .site-workspace { padding-bottom: calc(67px + env(safe-area-inset-bottom)); }
  .site-mobile-tabs { position: fixed; inset: auto 0 0; display: block; z-index: 20; padding: 0 env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left); border-top: 1px solid var(--line); background: var(--surface); }
  .site-mobile-tabs .site-nav { flex-direction: row; gap: 0; justify-content: space-around; }
  .site-mobile-tabs .site-nav-link { flex: 1; flex-direction: column; justify-content: center; gap: 4px; min-width: 0; height: 66px; padding: 9px 2px 7px; border-radius: 0; font-size: .625rem; line-height: 1.3; font-weight: 500; }
  .site-mobile-tabs .site-nav-link .nav-label { white-space: nowrap; overflow-wrap: normal; }
  .site-mobile-tabs .site-nav-link svg { width: 22px; height: 22px; flex-basis: 22px; }
  .site-mobile-tabs .site-nav-link[aria-current] { background: transparent; }
  .site-mobile-header { position: relative; display: flex; flex-shrink: 0; align-items: center; justify-content: space-between; gap: 1rem; min-height: 3.5rem; padding: max(.45rem, env(safe-area-inset-top)) max(1rem, env(safe-area-inset-right)) .45rem max(1rem, env(safe-area-inset-left)); border-bottom: 1px solid var(--line); background: var(--nav-bg); z-index: 20; }
  .site-mobile-header .site-brand { font-size: 1.25rem; padding: 0; }
  .site-mobile-header .brand-symbol { width: 1.5rem; height: 1.5rem; flex-basis: 1.5rem; border-width: .375rem; }
  .site-mobile-nav { display: block; flex-shrink: 0; }
  .site-mobile-nav > summary { display: flex; align-items: center; justify-content: center; min-height: 2.75rem; min-width: 2.75rem; padding: .5rem; border: 0; border-radius: .5rem; color: var(--muted); background: transparent; cursor: pointer; list-style: none; }
  .site-mobile-nav > summary::-webkit-details-marker { display: none; }
  .site-mobile-nav > summary svg { width: 1.375rem; height: 1.375rem; fill: none; stroke: currentColor; stroke-width: 1.7; }
  .site-mobile-nav > summary:hover, .site-mobile-nav[open] > summary { color: var(--accent); background: var(--hover); }
  .site-mobile-panel { position: fixed; right: max(.75rem, env(safe-area-inset-right)); bottom: calc(79px + env(safe-area-inset-bottom)); left: max(.75rem, env(safe-area-inset-left)); z-index: 30; max-height: min(32rem, calc(100dvh - 10rem)); overflow-y: auto; overscroll-behavior: contain; background: var(--surface); border: 1px solid var(--line); border-radius: .875rem; padding: 1rem; box-shadow: var(--shadow); }
  .site-mobile-panel .site-nav-link { min-height: 3rem; font-size: .875rem; }
  .site-mobile-panel .site-account { margin-top: 0; padding-top: 0; border-top: 0; }
  .site-mobile-panel .site-account-links { display: flex; flex-direction: row; flex-wrap: wrap; gap: .35rem; }
  .site-mobile-panel .site-account-links > a, .site-mobile-panel .site-account-links > form { flex: 1 1 6.5rem; }
  .site-mobile-panel .site-account-links > a, .site-mobile-panel .site-account-links button { min-height: 2.75rem; }
  .site-mobile-panel .site-theme-picker { max-width: 18rem; }
  .site-mobile-panel .site-theme-picker select, .site-mobile-panel .site-signout button { min-height: 2.75rem; }
  .site-content { padding: 1.5rem 1.25rem 2.5rem; }
  .site-footer { padding: 1rem 1.25rem; }
  .site-attention { padding: .6rem 1.25rem 0; }
  .site-attention-compact { padding: 0; }
  .site-document .page-heading { align-items: flex-start; }
  .home-heading { margin-bottom: 1.5rem; }
  .home-destination { min-height: 7rem; padding: 1.25rem; }
  .phone-room-list .site-content { padding-top: 0; }
  .phone-room-list .chatrooms-heading { min-height: calc(78px + env(safe-area-inset-top)); padding-top: env(safe-area-inset-top); }
  .phone-room-list .chatrooms-heading h1 { margin: 0; font-size: 1.6875rem; letter-spacing: -.035em; }
  .phone-conversation .site-mobile-header, .phone-conversation .site-mobile-tabs { display: none; }
  .phone-conversation .site-workspace { padding-bottom: 0; }
  .layout-chat.phone-conversation { height: var(--message-viewport-height, 100dvh); min-height: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .site-document { scroll-behavior: auto; }
}