:root {
  --bg: #0f0f11;
  --bg-panel: #17171a;
  --bg-elev: #1e1e22;
  --bg-hover: #26262b;
  --border: #2c2c32;
  --text: #ececee;
  --text-dim: #a0a0aa;
  --text-faint: #6e6e78;
  --accent: #c96442;
  --accent-soft: rgba(201, 100, 66, 0.15);
  --danger: #e05252;
  --radius: 12px;
  --sidebar-w: 268px;
  font-synthesis-weight: none;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: ui-sans-serif, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
  border-radius: 8px;
}

.hidden { display: none !important; }

/* ---------------------------------------------------------------- login */

#login {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: var(--bg);
  z-index: 100;
  padding: 24px;
}

.login-card {
  width: min(360px, 100%);
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px 26px;
  text-align: center;
}

.login-card h1 { margin: 0 0 4px; font-size: 21px; }
.login-card p { margin: 0 0 22px; color: var(--text-dim); font-size: 13px; }

.field {
  width: 100%;
  padding: 11px 13px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  outline: none;
}

.field:focus { border-color: var(--accent); }

.btn-primary {
  width: 100%;
  margin-top: 12px;
  padding: 11px;
  background: var(--accent);
  color: #fff;
  font-weight: 600;
  border-radius: 10px;
}

.btn-primary:disabled { opacity: .5; cursor: default; }

.error {
  color: var(--danger);
  font-size: 13px;
  min-height: 20px;
  margin-top: 10px;
}

/* -------------------------------------------------------------- layout */

#app { display: flex; height: 100%; }

#sidebar {
  width: var(--sidebar-w);
  flex: 0 0 var(--sidebar-w);
  background: var(--bg-panel);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.side-head {
  padding: 12px;
  display: flex;
  gap: 8px;
  align-items: center;
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 650;
  font-size: 14px;
  letter-spacing: .2px;
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.dot { width: 7px; height: 7px; border-radius: 50%; background: #3fb950; flex: 0 0 auto; }
.dot.off { background: var(--danger); }

.icon-btn {
  padding: 6px 8px;
  color: var(--text-dim);
  line-height: 1;
}
.icon-btn:hover { background: var(--bg-hover); color: var(--text); }

.tabs { display: flex; padding: 8px 8px 0; gap: 4px; }

.tab {
  flex: 1;
  padding: 7px 4px;
  font-size: 12.5px;
  color: var(--text-dim);
  border-radius: 8px;
  text-align: center;
}
.tab:hover { background: var(--bg-hover); }
.tab.active { background: var(--bg-elev); color: var(--text); font-weight: 600; }

.pane { flex: 1; overflow-y: auto; padding: 8px; min-height: 0; }

.new-chat {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 9px 11px;
  margin-bottom: 8px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  font-size: 13.5px;
  font-weight: 550;
}
.new-chat:hover { background: var(--bg-hover); }

.conv {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13.5px;
}
.conv:hover { background: var(--bg-hover); }
.conv.active { background: var(--accent-soft); }
.conv-title { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.conv .row-actions { opacity: 0; display: flex; gap: 2px; }
.conv:hover .row-actions, .conv.active .row-actions { opacity: 1; }

.empty { color: var(--text-faint); font-size: 13px; text-align: center; padding: 28px 12px; }

/* --------------------------------------------------------- memoria/files */

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 11px;
  margin-bottom: 7px;
  font-size: 13px;
}

.card-text { white-space: pre-wrap; word-break: break-word; }

.card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 7px;
  color: var(--text-faint);
  font-size: 11.5px;
}

.card-meta .spacer { flex: 1; }
.chip {
  padding: 1px 7px;
  border-radius: 20px;
  background: var(--bg-hover);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: .4px;
}
.chip.pinned { background: var(--accent-soft); color: var(--accent); }

.mini { font-size: 11.5px; color: var(--text-dim); }
.mini:hover { color: var(--text); text-decoration: underline; }
.mini.danger:hover { color: var(--danger); }

.add-row { display: flex; gap: 6px; margin-bottom: 8px; }
.add-row .field { padding: 8px 10px; font-size: 13px; }

.drop-zone {
  border: 1.5px dashed var(--border);
  border-radius: 10px;
  padding: 16px 10px;
  text-align: center;
  color: var(--text-dim);
  font-size: 12.5px;
  margin-bottom: 8px;
  cursor: pointer;
}
.drop-zone:hover, .drop-zone.over { border-color: var(--accent); color: var(--text); }

/* ---------------------------------------------------------------- chat */

#main { flex: 1; display: flex; flex-direction: column; min-width: 0; min-height: 0; }

.top-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

#burger { display: none; }
.top-title { flex: 1; font-size: 14px; font-weight: 600; overflow: hidden;
  text-overflow: ellipsis; white-space: nowrap; }
.model-tag { font-size: 11.5px; color: var(--text-faint); }

#messages { flex: 1; overflow-y: auto; padding: 22px 0 8px; scroll-behavior: smooth; }

.msg-wrap { max-width: 760px; margin: 0 auto; padding: 0 20px 26px; }

.msg-role {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .6px;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 7px;
}
.msg-role.user { color: var(--accent); }

.bubble-user {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 11px 14px;
  white-space: pre-wrap;
  word-break: break-word;
}

.md { word-break: break-word; }
.md > :first-child { margin-top: 0; }
.md > :last-child { margin-bottom: 0; }
.md h1, .md h2, .md h3 { margin: 1.3em 0 .5em; line-height: 1.3; }
.md h1 { font-size: 1.4em; }
.md h2 { font-size: 1.22em; }
.md h3 { font-size: 1.08em; }
.md p { margin: 0 0 .85em; }
.md ul, .md ol { margin: 0 0 .85em; padding-left: 1.4em; }
.md li { margin: .25em 0; }
.md a { color: #7aa7ff; }
.md blockquote {
  margin: 0 0 .85em;
  padding: 2px 0 2px 12px;
  border-left: 3px solid var(--border);
  color: var(--text-dim);
}
.md code {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 1px 5px;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: .88em;
}
.md hr { border: none; border-top: 1px solid var(--border); margin: 1.2em 0; }
.md table { border-collapse: collapse; width: 100%; margin: 0 0 .85em; font-size: .93em;
  display: block; overflow-x: auto; }
.md th, .md td { border: 1px solid var(--border); padding: 6px 10px; text-align: left; }
.md th { background: var(--bg-elev); }

.code-block {
  background: #0b0b0d;
  border: 1px solid var(--border);
  border-radius: 10px;
  margin: 0 0 .9em;
  overflow: hidden;
}
.code-head {
  display: flex;
  align-items: center;
  padding: 5px 10px;
  background: var(--bg-elev);
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-faint);
}
.code-head .spacer { flex: 1; }
.code-block pre { margin: 0; padding: 12px 13px; overflow-x: auto; }
.code-block code {
  background: none;
  border: none;
  padding: 0;
  font-size: 12.7px;
  line-height: 1.55;
}

.think {
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 10px;
  background: var(--bg-panel);
  overflow: hidden;
}
.think summary {
  padding: 7px 11px;
  cursor: pointer;
  font-size: 12px;
  color: var(--text-dim);
  user-select: none;
  list-style: none;
}
.think summary::-webkit-details-marker { display: none; }
.think summary:hover { color: var(--text); }
.think-body {
  padding: 0 12px 10px;
  font-size: 12.8px;
  color: var(--text-dim);
  white-space: pre-wrap;
  max-height: 320px;
  overflow-y: auto;
  border-top: 1px solid var(--border);
  padding-top: 9px;
}

.msg-foot {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-top: 9px;
  opacity: 0;
  transition: opacity .12s;
}
.msg-wrap:hover .msg-foot { opacity: 1; }
.stats { font-size: 11.5px; color: var(--text-faint); }

.attach-list { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 8px; }
.attach-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 9px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 12px;
}
.attach-pill button { color: var(--text-faint); padding: 0 2px; }
.attach-pill button:hover { color: var(--danger); }

.cursor-blink {
  display: inline-block;
  width: 7px;
  height: 15px;
  background: var(--accent);
  vertical-align: text-bottom;
  animation: blink 1s steps(2) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.banner {
  max-width: 760px;
  margin: 0 auto 16px;
  padding: 10px 14px;
  border-radius: 10px;
  background: rgba(224, 82, 82, .12);
  border: 1px solid rgba(224, 82, 82, .35);
  color: #ffb4b4;
  font-size: 13px;
}

.toast {
  position: fixed;
  bottom: 18px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  padding: 9px 16px;
  border-radius: 20px;
  font-size: 13px;
  z-index: 200;
  box-shadow: 0 6px 24px rgba(0,0,0,.45);
}

/* -------------------------------------------------------------- composer */

.composer-wrap { padding: 0 20px 14px; background: var(--bg); }
.composer {
  max-width: 760px;
  margin: 0 auto;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 10px 12px;
}
.composer:focus-within { border-color: #3d3d45; }

#input {
  width: 100%;
  background: none;
  border: none;
  outline: none;
  resize: none;
  max-height: 220px;
  min-height: 24px;
  padding: 2px 0;
  line-height: 1.55;
}

.composer-bar { display: flex; align-items: center; gap: 6px; margin-top: 8px; }
.composer-bar .spacer { flex: 1; }

.toggle {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 4px 9px;
  border-radius: 20px;
  font-size: 12px;
  color: var(--text-dim);
  border: 1px solid var(--border);
}
.toggle.on { background: var(--accent-soft); color: var(--accent); border-color: transparent; }

.send {
  width: 33px;
  height: 33px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
}
.send:disabled { background: var(--bg-hover); color: var(--text-faint); }
.send.stop { background: var(--text); color: var(--bg); }

.hint { text-align: center; font-size: 11px; color: var(--text-faint); margin-top: 8px; }

/* --------------------------------------------------------------- modal */

.modal-back {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .6);
  display: grid;
  place-items: center;
  z-index: 150;
  padding: 20px;
}
.modal {
  width: min(620px, 100%);
  max-height: 85vh;
  overflow-y: auto;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 22px;
}
.modal h2 { margin: 0 0 16px; font-size: 17px; }
.modal label { display: block; font-size: 12.5px; color: var(--text-dim); margin: 14px 0 5px; }
.modal pre {
  background: #0b0b0d;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  overflow-x: auto;
  font-size: 12px;
  white-space: pre-wrap;
  word-break: break-word;
}
.modal-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 20px; }
.btn {
  padding: 8px 15px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  font-size: 13.5px;
}
.btn:hover { background: var(--bg-hover); }
.btn.primary { background: var(--accent); border-color: transparent; color: #fff; font-weight: 600; }

/* --------------------------------------------------------------- mobile */

#scrim { display: none; }

@media (max-width: 820px) {
  #burger { display: block; }
  #sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 60;
    transform: translateX(-100%);
    transition: transform .2s ease;
    box-shadow: 0 0 40px rgba(0,0,0,.5);
  }
  body.nav-open #sidebar { transform: none; }
  body.nav-open #scrim {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 50;
  }
  .msg-wrap, .composer-wrap { padding-left: 14px; padding-right: 14px; }
  .msg-foot { opacity: 1; }
  #input { font-size: 16px; } /* evita el zoom automatico de iOS */
  .hint { display: none; }
}