:root {
  --bg: #212121;
  --bg2: #171717;
  --panel: #2a2a2a;
  --panel2: #313131;
  --hover: #2f2f2f;
  --text: #ececec;
  --dim: #9b9b9b;
  --dimmer: #6e6e6e;
  --accent: #8b6cff;
  --accent2: #a48bff;
  --user-bubble: #2f2f2f;
  --border: #3a3a3a;
  --danger: #ff6b6b;
  --ok: #3ecf6e;
  --code-bg: #1a1a1a;
  --radius: 14px;
}
* { box-sizing: border-box; }
/* An author-stylesheet `display` on an element always beats the UA's
   `[hidden]{display:none}`, regardless of selector specificity — so any
   element that both sets `display` and gets toggled via .hidden (authGate,
   attach-chips, meta, …) needs this to actually disappear. */
[hidden] { display: none !important; }
html, body {
  height: 100%;
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}
button { font-family: inherit; }
#app { display: flex; height: 100vh; height: 100dvh; overflow: hidden; min-height: 0; }

/* ---------- sidebar ---------- */
#side {
  width: 268px;
  flex: none;
  background: var(--bg2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 10px;
  padding-top: calc(10px + env(safe-area-inset-top));
  min-height: 0;
  transition: margin-left .2s ease;
}
#side .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 8px 14px;
}
#side .brand .dot {
  width: 28px; height: 28px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #d06bff);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700; flex: none;
}
#side .brand .name { font-weight: 600; font-size: 15px; }
#side .brand .status {
  margin-left: auto; width: 8px; height: 8px; border-radius: 50%;
  background: var(--dimmer); flex: none;
}
#side .brand .status.up { background: var(--ok); box-shadow: 0 0 6px var(--ok); }
#side .brand .status.down { background: var(--danger); box-shadow: 0 0 6px var(--danger); }

.side-actions { display: flex; gap: 6px; }
#newchat {
  flex: 1; padding: 11px 12px; border-radius: 10px; border: 1px solid var(--border);
  background: transparent; color: var(--text); cursor: pointer; font-size: 14px;
  text-align: left; display: flex; align-items: center; gap: 8px; min-width: 0;
}
#newchat:hover { background: var(--panel); }
#newproject {
  flex: none; padding: 11px 12px; border-radius: 10px; border: 1px solid var(--border);
  background: transparent; color: var(--text); cursor: pointer; font-size: 13px;
}
#newproject:hover { background: var(--panel); }

#convList { flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch; margin-top: 12px; display: flex; flex-direction: column; gap: 2px; min-height: 0; }
.conv-row {
  display: flex; align-items: center; gap: 8px; padding: 9px 10px; border-radius: 8px;
  cursor: pointer; color: var(--dim); font-size: 13.5px; position: relative;
}
.conv-row:hover { background: var(--hover); color: var(--text); }
.conv-row.active { background: var(--panel2); color: var(--text); }
.conv-row.editing { background: var(--panel2); }
.conv-row .title { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.conv-row .title-edit {
  flex: 1; min-width: 0; background: var(--bg2); border: 1px solid var(--accent); color: var(--text);
  border-radius: 6px; padding: 3px 6px; font-size: 13.5px; font-family: inherit; outline: 0;
}
.conv-row .row-btn, .project-header .row-btn {
  opacity: 0; border: 0; background: transparent; color: var(--dim); cursor: pointer;
  padding: 2px 4px; border-radius: 5px; font-size: 13px; flex: none;
}
.conv-row:hover .row-btn { opacity: 1; }
.conv-row .menu-btn { font-size: 15px; font-weight: 700; }
.conv-row .menu-btn:hover, .row-menu button:hover { background: var(--panel); color: var(--text); }
.project-header .del:hover { color: var(--danger); background: rgba(255,107,107,.12); }
.project-header [data-act]:hover { color: var(--text); background: var(--panel2); }
.conv-empty { color: var(--dimmer); font-size: 12.5px; padding: 14px 10px; line-height: 1.5; }

/* ---------- projects (folders) ---------- */
.project-group { margin-bottom: 2px; }
.project-header {
  display: flex; align-items: center; gap: 7px; padding: 8px 10px; border-radius: 8px;
  cursor: pointer; color: var(--dim); font-size: 13px; font-weight: 600; position: relative;
}
.project-header:hover { background: var(--hover); color: var(--text); }
.project-header .chev { font-size: 9px; transition: transform .15s ease; flex: none; }
.project-header.open .chev { transform: rotate(90deg); }
.project-header .folder { flex: none; }
.project-header .pname { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.project-header .count { color: var(--dimmer); font-weight: 400; font-size: 11.5px; flex: none; }
.project-header:hover .row-btn { opacity: 1; }
.project-convs { padding-left: 16px; display: flex; flex-direction: column; gap: 2px; }
.project-convs:empty::after {
  content: 'No chats yet'; display: block; color: var(--dimmer); font-size: 12px; padding: 6px 10px 8px;
}
.section-label {
  font-size: 11px; color: var(--dimmer); text-transform: uppercase; letter-spacing: .06em;
  padding: 12px 10px 4px;
}

/* per-row "⋯" action popover: rename / move to project / delete */
.row-menu {
  position: absolute; right: 6px; top: calc(100% + 2px); z-index: 30; min-width: 180px;
  background: var(--panel2); border: 1px solid var(--border); border-radius: 10px; padding: 5px;
  box-shadow: 0 10px 30px rgba(0,0,0,.4); max-height: 320px; overflow-y: auto;
}
.row-menu button {
  display: block; width: 100%; text-align: left; padding: 7px 9px; border-radius: 7px; border: 0;
  background: transparent; color: var(--text); font-size: 12.5px; cursor: pointer;
}
.row-menu button:hover { background: var(--hover); }
.row-menu button.danger { color: var(--danger); }
.row-menu button.danger:hover { background: rgba(255,107,107,.12); }
.row-menu .mm-label { color: var(--dimmer); font-size: 10.5px; text-transform: uppercase; padding: 7px 9px 2px; }
.row-menu .row-menu-divider { height: 1px; background: var(--border); margin: 5px 2px; }

#side .hint {
  font-size: 11px; color: var(--dimmer); line-height: 1.5; padding: 10px 8px 4px;
  border-top: 1px solid var(--border); margin-top: 8px;
}

/* ---------- main column ---------- */
#main { flex: 1; display: flex; flex-direction: column; min-width: 0; min-height: 0; position: relative; }
#topbar {
  display: none; align-items: center; gap: 10px; padding: 10px 14px;
  padding-top: calc(10px + env(safe-area-inset-top));
  border-bottom: 1px solid var(--border); flex: none;
}
#hamburger {
  border: 0; background: transparent; color: var(--text); font-size: 18px; cursor: pointer;
  padding: 4px 8px; border-radius: 8px;
}
#hamburger:hover { background: var(--panel); }
#topbar .title { font-size: 14px; color: var(--dim); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

#log { flex: 1; overflow-y: auto; -webkit-overflow-scrolling: touch; padding: 26px 0 12px; min-height: 0; }
.row { max-width: 780px; margin: 0 auto 24px; padding: 0 22px; display: flex; gap: 16px; align-items: flex-start; }
.row .who {
  width: 40px; height: 40px; border-radius: 50%; flex: none; display: flex; align-items: center;
  justify-content: center; font-size: 19px; margin-top: 1px;
  box-shadow: 0 0 0 1px rgba(255,255,255,.07), 0 4px 14px rgba(0,0,0,.35);
}
.row.u .who {
  background: linear-gradient(135deg, #3d5a78, #223244);
  box-shadow: 0 0 0 1px rgba(255,255,255,.07), 0 4px 14px rgba(0,0,0,.35), 0 0 16px rgba(93,163,255,.22);
}
.row.a .who {
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent), #d06bff 55%, #ff8fd6);
  background-size: 220% 220%;
  animation: auraShimmer 7s ease-in-out infinite;
  box-shadow: 0 0 0 1px rgba(255,255,255,.1), 0 4px 16px rgba(139,108,255,.5), 0 0 24px rgba(208,107,255,.4);
}
@keyframes auraShimmer {
  0%, 100% { background-position: 0% 40%; }
  50% { background-position: 100% 60%; }
}
@media (prefers-reduced-motion: reduce) {
  .row.a .who { animation: none; }
}
.row .col { flex: 1; min-width: 0; }
.row .bubble {
  line-height: 1.65; font-size: 15px; word-wrap: break-word;
}
.row.u .bubble { background: var(--user-bubble); padding: 12px 16px; border-radius: 16px; white-space: pre-wrap; }
.row.a .bubble p:first-child { margin-top: 0; }
.row.a .bubble p:last-child { margin-bottom: 0; }
.row .bubble.empty::after {
  content: ''; display: inline-block; width: 7px; height: 7px; border-radius: 50%;
  background: var(--dim); animation: pulse 1s ease-in-out infinite;
}
@keyframes pulse { 0%, 100% { opacity: .25; } 50% { opacity: 1; } }

/* attachments on a user message */
.attach-chips { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 8px; }
.attach-chip {
  display: flex; align-items: center; gap: 6px; background: var(--panel2); border: 1px solid var(--border);
  border-radius: 10px; padding: 5px 9px; font-size: 12px; color: var(--dim); max-width: 220px;
}
.attach-chip img { width: 20px; height: 20px; object-fit: cover; border-radius: 4px; }
.attach-chip .name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* reasoning / thinking panel */
.think {
  margin-bottom: 10px; border: 1px solid var(--border); border-radius: 10px; overflow: hidden;
  background: rgba(255,255,255,.02);
}
.think summary {
  list-style: none; cursor: pointer; padding: 8px 12px; font-size: 12.5px; color: var(--dim);
  display: flex; align-items: center; gap: 7px; user-select: none;
}
.think summary::-webkit-details-marker { display: none; }
.think summary .chev { transition: transform .15s ease; font-size: 10px; }
.think[open] summary .chev { transform: rotate(90deg); }
.think summary .spin {
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent2);
  animation: pulse .9s ease-in-out infinite;
}
.think.done summary .spin { animation: none; opacity: .3; }
.think .think-body {
  padding: 2px 14px 10px; font-size: 12.5px; color: var(--dimmer); white-space: pre-wrap;
  max-height: 220px; overflow-y: auto; border-top: 1px solid var(--border);
  margin-top: 4px; padding-top: 8px; line-height: 1.55;
}

/* tool status chips */
.tools { display: flex; flex-direction: column; gap: 6px; margin-bottom: 4px; }
.tools:empty { display: none; }
.tool-chip {
  display: inline-flex; align-items: center; gap: 6px; font-size: 12px; color: var(--dim);
  background: var(--panel2); border: 1px solid var(--border); border-radius: 20px;
  padding: 4px 10px; width: fit-content;
}
.tool-chip.done { color: var(--dimmer); }
.tool-chip .tick { color: var(--ok); }

.row .meta { display: flex; align-items: center; gap: 10px; margin-top: 9px; }
.row .meta .msg-btn {
  border: 0; background: transparent; color: var(--dimmer); cursor: pointer; font-size: 12px;
  padding: 3px 6px; border-radius: 6px; display: inline-flex; align-items: center; gap: 4px;
}
.row .meta .msg-btn:hover { background: var(--panel); color: var(--text); }
.row .err { color: var(--danger); }

.bubble code { background: var(--code-bg); padding: 1px 6px; border-radius: 5px; font-size: 13px; }
.bubble pre {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px;
  overflow-x: auto; position: relative; margin: 10px 0;
}
.bubble pre code { background: none; padding: 0; font-size: 13px; }
.bubble .code-copy {
  position: absolute; top: 6px; right: 8px; font-size: 11px; color: var(--dim);
  background: var(--panel2); border: 1px solid var(--border); border-radius: 6px; padding: 3px 8px;
  cursor: pointer; opacity: 0; transition: opacity .1s;
}
.bubble pre:hover .code-copy { opacity: 1; }
.bubble table { border-collapse: collapse; margin: 10px 0; font-size: 13.5px; }
.bubble th, .bubble td { border: 1px solid var(--border); padding: 6px 10px; }
.bubble a { color: var(--accent2); }
.bubble ul, .bubble ol { padding-left: 22px; }
.bubble blockquote { border-left: 3px solid var(--border); margin: 8px 0; padding: 2px 14px; color: var(--dim); }

/* connection banner */
#connBanner {
  max-width: 780px; margin: 0 auto 4px; padding: 9px 16px; background: #4a2323; color: #ffcccc;
  border-radius: 10px; font-size: 13px; display: none; align-items: center; gap: 10px;
}
#connBanner button {
  border: 1px solid rgba(255,255,255,.25); background: transparent; color: inherit; border-radius: 7px;
  padding: 4px 10px; cursor: pointer; font-size: 12px;
}

/* ---------- composer ---------- */
#composer { padding: 6px 12px calc(18px + env(safe-area-inset-bottom)); flex: none; }
#chips { max-width: 780px; margin: 0 auto 8px; padding: 0 4px; display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  background: var(--panel2); border: 1px solid var(--border); border-radius: 20px; color: var(--dim);
  font-size: 12px; padding: 4px 6px 4px 10px; display: flex; gap: 7px; align-items: center; max-width: 220px;
}
.chip img { width: 22px; height: 22px; border-radius: 5px; object-fit: cover; }
.chip .fname { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chip .x { cursor: pointer; opacity: .7; background: var(--panel); border-radius: 50%; width: 16px; height: 16px; display: inline-flex; align-items: center; justify-content: center; }
.chip .x:hover { opacity: 1; }

#box {
  max-width: 780px; margin: 0 auto; background: var(--panel); border: 1px solid var(--border);
  border-radius: 24px; padding: 8px 8px 8px 14px; display: flex; gap: 8px; align-items: flex-end;
}
#box.drag { outline: 2px dashed var(--accent); outline-offset: -2px; }
#txt {
  flex: 1; background: transparent; border: 0; outline: 0; color: var(--text); resize: none;
  /* 16px keeps iOS Safari from auto-zooming the page on focus */
  font-size: 16px; line-height: 1.5; max-height: 200px; font-family: inherit; padding: 9px 4px;
}
#txt::placeholder { color: var(--dimmer); }
#attachBtn, #sendBtn {
  border: 0; background: transparent; color: var(--dim); cursor: pointer; font-size: 18px;
  padding: 9px; border-radius: 50%; line-height: 1; flex: none;
}
#attachBtn:hover { background: var(--panel2); color: var(--text); }
#sendBtn { background: var(--text); color: #111; width: 38px; height: 38px; padding: 0; display: flex; align-items: center; justify-content: center; }
#sendBtn:disabled { opacity: .3; cursor: default; }
#sendBtn.stop { background: var(--danger); color: #fff; }

.status-line { max-width: 780px; margin: 0 auto 6px; padding: 0 16px; font-size: 11.5px; color: var(--dimmer); text-align: center; height: 15px; }

::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-thumb { background: #3d3d3d; border-radius: 6px; }

#dropOverlay {
  position: fixed; inset: 0; background: rgba(139,108,255,.12); border: 3px dashed var(--accent);
  z-index: 40; display: none; align-items: center; justify-content: center; font-size: 20px; color: var(--text);
  pointer-events: none;
}
#dropOverlay.show { display: flex; }

/* mobile sidebar backdrop */
#sideBackdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,.45); z-index: 45;
  opacity: 0; pointer-events: none; transition: opacity .2s ease;
}
#sideBackdrop.show { opacity: 1; pointer-events: auto; }

/* access-key gate */
#authGate {
  position: fixed; inset: 0; z-index: 100; background: rgba(15,15,15,.92);
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.auth-card {
  width: 100%; max-width: 340px; background: var(--panel); border: 1px solid var(--border);
  border-radius: 16px; padding: 22px 20px; text-align: center;
}
.auth-card .brand { display: flex; align-items: center; justify-content: center; gap: 10px; margin-bottom: 14px; }
.auth-card .brand .dot {
  width: 30px; height: 30px; border-radius: 50%; background: linear-gradient(135deg, var(--accent), #d06bff);
  display: inline-flex; align-items: center; justify-content: center; font-weight: 700; font-size: 14px;
}
.auth-card .brand .name { font-weight: 600; font-size: 16px; }
.auth-card p { color: var(--dim); font-size: 13px; line-height: 1.5; margin: 0 0 16px; }
.auth-card input {
  width: 100%; padding: 11px 13px; border-radius: 10px; border: 1px solid var(--border);
  background: var(--bg2); color: var(--text); font-size: 16px; margin-bottom: 10px; outline: 0;
}
.auth-card input:focus { border-color: var(--accent); }
.auth-card button {
  width: 100%; padding: 11px; border-radius: 10px; border: 0; background: var(--accent); color: #fff;
  font-size: 14px; font-weight: 600; cursor: pointer;
}
.auth-card button:hover { background: var(--accent2); }
.auth-err { color: var(--danger); font-size: 12.5px; margin: -4px 0 10px; }

@media (max-width: 860px) {
  #side {
    position: fixed; inset: 0 auto 0 0; z-index: 50; width: 84vw; max-width: 300px;
    margin-left: -100%;
  }
  #side.open { margin-left: 0; }
  #topbar { display: flex; }
  .row { padding: 0 14px; gap: 12px; margin-bottom: 20px; }
  .row .who { width: 34px; height: 34px; font-size: 16px; }
  #composer { padding-left: 8px; padding-right: 8px; }
}