:root {
  --r1: 6px;
  --r2: 8px;
  --r3: 8px;
  --glass: #ffffff;
  --glass-brd: var(--line);
  --shadow: 0 14px 34px rgba(24, 24, 23, 0.12);
}

html[data-theme="dark"] {
  --paper: #171716;
  --card: #222220;
  --card-2: #292927;
  --text: #f4f4ef;
  --text-mut: #aaa9a2;
  --line: #383835;
  --ink: #101010;
  --glass: #222220;
  --glass-brd: #3b3b38;
  --shadow: 0 16px 38px rgba(0, 0, 0, 0.34);
}

body, body * { letter-spacing: 0; }
body h1, body h2, body h3, body h4,
.sb-brand .nm, .chat-title, .upgrade h3, .set-body h3 {
  font-family: "Hanken Grotesk", system-ui, sans-serif;
}

.app { grid-template-columns: 264px minmax(0, 1fr); }
.sidebar { padding: 12px; gap: 10px; background: #191918; }
.sb-top { padding: 5px 4px 3px; }
.sb-brand { gap: 8px; }
.sb-brand svg { display: none; }
.sb-brand::before {
  width: 27px;
  height: 27px;
  flex: none;
  background: url("brand-mark.svg") center / contain no-repeat;
  content: "";
}
.sb-brand .nm { color: #f7f7f3; font-size: 18px; font-weight: 700; }
.beta {
  margin-left: 7px;
  padding: 0;
  color: #8f8f89;
  background: transparent;
  border-radius: 0;
  font-size: 10px;
  font-weight: 500;
  text-transform: lowercase;
}
.newchat {
  justify-content: flex-start;
  min-height: 42px;
  padding: 10px 12px;
  color: #181817;
  background: #f7f7f3;
  border: 1px solid #f7f7f3;
  border-radius: 8px;
  transition: color .16s ease, background-color .16s ease, border-color .16s ease, transform .16s ease;
}
.newchat:hover { color: #fff; background: var(--accent); border-color: var(--accent); transform: translateY(-1px); }
.newchat:active { transform: scale(.985); }
.sb-search { padding: 9px 10px; background: #222220; border-color: #343431; border-radius: 8px; transition: border-color .16s ease, background-color .16s ease; }
.sb-search:focus-within { border-color: #5e5e58; background: #272725; }
.convo-list { gap: 2px; }
.convo { padding: 9px 8px; border-radius: 6px; transition: background-color .15s ease, color .15s ease, transform .15s ease; }
.convo:hover { transform: translateX(2px); }
.convo.active { background: #30302d; }
.skel { border-radius: 3px; background: #252523; background-image: none; animation: none; }
.acct { border-radius: 8px; transition: background-color .15s ease, transform .15s ease; }
.acct:hover { transform: translateY(-1px); }
.avatar { color: #fff; background: var(--accent); border-radius: 6px; }
.menu, .model-menu, .tools-menu {
  background: var(--glass);
  border-radius: 8px;
  box-shadow: var(--shadow);
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}
.menu-item, .model-opt, .tool-item {
  border-radius: 6px;
  transition: color .15s ease, background-color .15s ease, border-color .15s ease, transform .15s ease;
}
.menu-item:hover, .model-opt:hover, .tool-item:hover { transform: translateX(2px); }
.menu-item:hover svg, .tool-item:hover svg { color: var(--accent); }
.menu-ver { letter-spacing: 0; }
.app.collapsed .newchat { justify-content: center; width: 44px; min-height: 44px; padding: 0; }
.app.collapsed .sb-search { width: 44px; min-height: 44px; padding: 0; }
.app.collapsed .acct { width: 44px; min-height: 44px; padding: 0; }
.app.collapsed .menu { position: fixed; left: 76px; right: auto; bottom: 12px; width: 240px; }

.main { background: var(--paper); }
.topbar { min-height: 58px; padding: 9px 18px; border-bottom: 1px solid var(--line); }
.chat-title { font-size: 16px; font-weight: 600; }
.icon-btn { border-radius: 7px; transition: color .15s ease, background-color .15s ease, transform .15s ease; }
.icon-btn:hover { transform: translateY(-1px); }
.icon-btn:active { transform: scale(.94); }
.model-pick { padding: 8px 10px; background: transparent; border-color: var(--line); border-radius: 8px; transition: background-color .15s ease, border-color .15s ease, transform .15s ease; }
.model-pick:hover { background: var(--card); transform: translateY(-1px); }
.model-pick .dot { display: none; }
.model-grouplab, .ob-label { letter-spacing: 0; text-transform: none; }
.lock-tag, .lock-tag.max { color: var(--text); background: var(--bone); border-radius: 2px; }

.test-banner {
  max-width: 720px;
  margin-top: 12px;
  padding: 9px 12px;
  color: var(--text);
  background: #eef2ff;
  border: 1px solid #cdd7ff;
  border-radius: 8px;
}
html[data-theme="dark"] .test-banner { color: #dce4ff; background: #202844; border-color: #384a85; }
.guest-copy { gap: 10px; }
.guest-remaining {
  padding: 0;
  color: var(--accent-deep);
  background: transparent;
  border: 0;
  border-radius: 0;
  font-weight: 600;
}
html[data-theme="dark"] .guest-remaining { color: #9cb1ff; }
.test-banner a { color: inherit; font-weight: 600; }

.messages { padding-top: 12px; }
.empty { max-width: 700px; margin: 9vh auto 0; padding: 0 24px; text-align: left; }
.empty > svg { display: none; }
.empty h2 { margin: 0 0 7px; font-size: 31px; font-weight: 600; }
.empty p { text-align: left; }
.onboard { max-width: 700px; margin-top: 27px; }
.ob-label { margin-bottom: 8px !important; color: var(--text-mut) !important; font-size: 12px; font-weight: 600; }
.ob-grid { grid-template-columns: 1fr 1fr; gap: 10px; border-top: 0; }
.ob-card {
  min-height: 78px;
  padding: 14px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow-sm);
  transition: color .16s ease, background-color .16s ease, border-color .16s ease, transform .16s ease, box-shadow .16s ease;
}
.ob-card:hover { color: var(--accent-deep); border-color: #aebdff; background: #f8f9ff; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(24,24,23,.07); }
html[data-theme="dark"] .ob-card:hover { background: #202844; border-color: #384a85; }
.ob-card strong { font-size: 14px; }
.chips { justify-content: flex-start; gap: 8px; margin-top: 22px; }
.chip { max-width: 230px; padding: 10px 12px; background: transparent; border-radius: 8px; transition: color .15s ease, background-color .15s ease, border-color .15s ease, transform .15s ease; }
.chip:hover { color: var(--accent-deep); background: var(--card); border-color: var(--accent); transform: translateY(-1px); }

.msg { max-width: 780px; gap: 13px; padding: 15px 24px; }
.msg .ava { border-radius: 6px; }
.msg.user .ava { color: #fff; background: var(--accent); }
.msg.bot .ava { color: #fff; background: var(--ink); }
.msg.bot .ava svg { display: none; }
.msg.bot .ava::before { content: "S"; font-size: 12px; font-weight: 700; }
.msg .body { line-height: 1.62; }
.msg .body pre { border-radius: 5px; }
.code-copy { border-radius: 3px; }
.ai-note .credit, .ai-note .note-act { color: var(--accent-deep); }
.ai-note .fb-btn { filter: none; }
.err-row { border-radius: 4px; }

.composer { padding: 11px 20px 17px; }
.composer-inner {
  max-width: 780px;
  background: var(--card);
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(24, 24, 23, 0.06);
}
.composer-inner:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(49, 94, 251, 0.1); }
.tool-btn, .mic-btn { border-radius: 7px; transition: color .15s ease, background-color .15s ease, transform .15s ease; }
.tool-btn:hover, .mic-btn:hover { transform: translateY(-1px); }
.send { color: #fff; background: var(--ink); border-radius: 7px; transition: background-color .15s ease, transform .15s ease; }
.send:hover { background: var(--accent); transform: translateY(-1px); }
.send:active { transform: scale(.94); }
.composer-note { max-width: 780px; font-size: 11px; }

.upgrade, .settings {
  background: var(--card);
  border-radius: 8px;
  box-shadow: var(--shadow);
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}
.ubtn, input.mini, select.mini, .seg, .ta, .set-note, .credit-row, .credit-empty,
.set-search, .adm-list, .cs-btn, .cs-menu { border-radius: 8px; }
.account-name-row > div:first-child { min-width: 0; flex: 1 1 auto; }
.account-name-actions { display: flex; gap: 8px; align-items: center; flex: none; }
.ubtn, .set-nav .st, .seg button, .cs-btn, .cs-opt, .row2 { transition: color .15s ease, background-color .15s ease, border-color .15s ease, transform .15s ease; }
.ubtn:hover { transform: translateY(-1px); background: var(--card-2); }
.ubtn:active { transform: scale(.98); }
.set-nav .st { border-radius: 6px; }
.set-nav .st:hover { transform: translateX(2px); }
.seg button, .cs-opt { border-radius: 6px; }
.seg button:hover, .cs-opt:hover { color: var(--text); background: var(--card-2); }
.cs-btn:hover { transform: translateY(-1px); }
.row2:hover { background: color-mix(in srgb, var(--card) 70%, transparent); }
.soonpill { border-radius: 6px; }
.set-toast { border-radius: 7px; }

@media (max-width: 860px) {
  .app, .app.collapsed { grid-template-columns: minmax(0, 1fr); }
  .sidebar { width: min(286px, 88vw); }
  .app.collapsed .newchat { justify-content: flex-start; width: 100%; padding: 10px 12px; }
  .app.collapsed .sb-search { justify-content: flex-start; width: 100%; padding: 9px 10px; }
  .app.collapsed .acct { justify-content: flex-start; width: 100%; padding: 8px; }
  .app.collapsed .menu { position: absolute; left: 0; bottom: calc(100% + 6px); }
  .topbar { min-height: 54px; padding-inline: 12px; }
  .test-banner { margin: 8px 12px 0; }
  .empty { margin-top: 7vh; }

  #settingsModal {
    align-items: stretch;
    padding: 0;
  }
  #settingsModal .settings {
    display: flex;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    max-height: none;
    flex-direction: column;
    background: var(--paper);
    border: 0;
    border-radius: 0;
  }
  #settingsModal .set-nav {
    position: relative;
    display: flex;
    min-height: 112px;
    flex: none;
    gap: 5px;
    padding: 60px 12px 10px;
    overflow-x: auto;
    background: var(--card);
    border-right: 0;
    border-bottom: 1px solid var(--line);
    scrollbar-width: none;
  }
  #settingsModal .set-nav::-webkit-scrollbar { display: none; }
  #settingsModal .set-nav::before {
    content: "Settings";
    position: absolute;
    top: 18px;
    left: 18px;
    color: var(--text);
    font-size: 20px;
    font-weight: 650;
  }
  #settingsModal .set-nav .st {
    min-height: 36px;
    flex: none;
    padding: 8px 11px;
    border: 1px solid transparent;
    border-radius: 7px;
    font-size: 13px;
  }
  #settingsModal .set-nav .st:hover { transform: none; }
  #settingsModal .set-nav .st.on {
    color: var(--text);
    background: var(--paper);
    border-color: var(--line);
  }
  #settingsModal .set-close {
    top: 10px;
    right: 10px;
    z-index: 8;
    width: 40px;
    height: 40px;
    background: var(--paper);
    border: 1px solid var(--line);
  }
  #settingsModal .set-body {
    width: min(100%, 720px);
    flex: 1;
    align-self: center;
    padding: 18px 20px calc(28px + env(safe-area-inset-bottom));
    overscroll-behavior: contain;
  }
  #settingsModal .set-search {
    top: -18px;
    margin: 0 -2px 2px;
    padding-block: 10px;
    background: var(--paper);
  }
  #settingsModal .set-body h3 {
    margin-top: 12px;
    font-size: 22px;
  }
  #settingsModal .row2 {
    min-height: 56px;
    padding-block: 15px;
  }
  #settingsModal .row2:hover { background: transparent; }
  #settingsModal .ta { min-height: 108px; }
}

@media (max-width: 540px) {
  .empty { margin-top: 34px; padding: 0 18px; }
  .empty h2 { font-size: 26px; }
  .ob-grid { grid-template-columns: 1fr 1fr; gap: 0 16px; }
  .chips { display: grid; grid-template-columns: 1fr; }
  .chip { max-width: none; }
  .composer { padding: 8px 10px 12px; }
  .composer-note { margin-top: 7px; font-size: 10px; line-height: 1.35; }
  .guest-copy { gap: 6px 9px; }

  #settingsModal .set-body { padding-inline: 16px; }
  #settingsModal .set-nav { padding-inline: 10px; }
  #settingsModal .set-nav::before { left: 16px; }
  #settingsModal .row2 {
    align-items: flex-start;
    gap: 10px;
  }
  #settingsModal .row2 > div:first-child:not(.seg):not(.cs) { min-width: 0; }
  #settingsModal .row2 > .seg,
  #settingsModal .row2 > .cs,
  #settingsModal .row2 > select.mini {
    width: 100%;
  }
  #settingsModal .row2 > .seg button { flex: 1; }
  #settingsModal .row2 > .cs .cs-btn { width: 100%; }
  #settingsModal .row2:has(> .seg),
  #settingsModal .row2:has(> .cs),
  #settingsModal .row2:has(> select.mini) {
    flex-direction: column;
  }
  #settingsModal .account-name-row { flex-direction: column; }
  #settingsModal .account-name-row > div:first-child { width: 100%; flex: none; }
  #settingsModal .account-name-actions {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    width: 100%;
  }
  #settingsModal .account-name-actions input.mini { width: 100% !important; min-width: 0; }
  #settingsModal .legal-links { grid-template-columns: 1fr; }
}

@media (max-height: 520px) and (max-width: 860px) {
  #settingsModal .set-nav { min-height: 94px; padding-top: 50px; }
  #settingsModal .set-nav::before { top: 12px; }
  #settingsModal .set-close { top: 6px; }
  #settingsModal .set-body { padding-top: 12px; }
}