:root {
  --bg: #0f1115;
  --bg-2: #161922;
  --bg-3: #1d2230;
  --fg: #e6e8ee;
  --fg-dim: #8b91a3;
  --accent: #76b900;       /* NVIDIA green */
  --user: #2a3f5a;
  --assistant: #1d2230;
  --border: #2a2f3d;
  --error: #ff6b6b;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.5 -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  display: flex;
  flex-direction: column;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem;
  height: 100vh;
}

/* ---------- Header ---------- */

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 0 0.5rem;
}

.brand { display: flex; align-items: center; gap: 0.5rem; }
.brand .logo { font-size: 1.5rem; color: var(--accent); }
.brand h1 { margin: 0; font-size: 1.15rem; font-weight: 600; }

.controls { display: flex; gap: 0.75rem; align-items: center; color: var(--fg-dim); font-size: 0.85rem; }

.controls button {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--fg);
  width: 30px; height: 30px;
  border-radius: 6px;
  cursor: pointer;
}
.controls button:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Tabs ---------- */

nav.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 2px solid var(--border);
  overflow-x: auto;
  flex-shrink: 0;
}

nav.tabs button {
  background: transparent;
  border: none;
  color: var(--fg-dim);
  padding: 8px 14px;
  font-size: 0.9rem;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  white-space: nowrap;
}

nav.tabs button:hover { color: var(--fg); }

nav.tabs button.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
  font-weight: 600;
}

/* ---------- Panels ---------- */

main {
  flex: 1;
  overflow-y: auto;
  min-height: 0;
}

.tab-panel { display: none; padding: 1rem 0; }
.tab-panel.active { display: block; }

#tab-chat.active {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.tab-toolbar {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--fg-dim);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.tab-toolbar select,
.tab-toolbar input[type="range"],
.tab-toolbar input[type="number"] {
  background: var(--bg-2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 6px;
  margin-left: 4px;
}

/* ---------- Chat messages ---------- */

#chat {
  flex: 1;
  overflow-y: auto;
  min-height: 120px;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 0.75rem 0;
}

.msg {
  max-width: 85%;
  padding: 0.7rem 1rem;
  border-radius: 12px;
  white-space: pre-wrap;
  word-wrap: break-word;
}
.msg.user { background: var(--user); align-self: flex-end; border-bottom-right-radius: 4px; }
.msg.assistant { background: var(--assistant); align-self: flex-start; border-bottom-left-radius: 4px; border: 1px solid var(--border); }
.msg.error { background: rgba(255,107,107,.1); border: 1px solid var(--error); color: var(--error); }

.msg .role {
  font-size: 0.72rem;
  color: var(--fg-dim);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: .05em;
}

.msg .cursor {
  display: inline-block;
  width: 7px; height: 1em;
  background: var(--accent);
  vertical-align: text-bottom;
  animation: blink 1s infinite;
  margin-left: 2px;
}

@keyframes blink { 0%,50%{opacity:1} 50.01%,100%{opacity:0} }

#status {
  padding: 0.4rem 0.8rem;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.82rem;
  color: var(--fg-dim);
  margin-bottom: 0.5rem;
}

.hidden { display: none !important; }

form#composer { display: flex; gap: 0.5rem; padding-top: 0.5rem; }

#input {
  flex: 1;
  background: var(--bg-2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.7rem;
  resize: none;
  font-family: inherit;
  font-size: inherit;
  max-height: 180px;
}
#input:focus { outline: none; border-color: var(--accent); }

#btn-send, #btn-stop {
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 8px;
  padding: 0 1.2rem;
  font-weight: 600;
  cursor: pointer;
}
#btn-send:hover { background: #8acc1a; }
#btn-stop { background: var(--error); color: #fff; }

/* ---------- Tool panels (các tab còn lại) ---------- */

.tool-panel {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.25rem;
  max-width: 780px;
}

.tool-panel h3 { margin: 0 0 0.6rem; font-size: 1rem; color: var(--accent); }
.tool-panel .hint { font-size: 0.83rem; color: var(--fg-dim); margin: 0 0 0.75rem; }
.tool-panel .hint code { background: var(--bg-3); padding: 1px 5px; border-radius: 4px; }

.tool-panel label {
  display: block;
  margin: 0.6rem 0;
  font-size: 0.85rem;
  color: var(--fg-dim);
}

.tool-panel textarea,
.tool-panel input:not([type="range"]):not([type="checkbox"]) {
  width: 100%;
  background: var(--bg-3);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.55rem;
  margin-top: 4px;
  font-family: inherit;
  font-size: inherit;
  resize: vertical;
}

.tool-panel select {
  background: var(--bg-3);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 8px;
  margin-top: 4px;
  max-width: 100%;
}

.tool-panel .row {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  flex-wrap: wrap;
  margin: 0.6rem 0;
}

.tool-panel .row label { margin: 0; display: flex; align-items: center; gap: 6px; }

.tool-panel button {
  background: var(--accent);
  color: #000;
  border: none;
  border-radius: 6px;
  padding: 7px 16px;
  font-weight: 600;
  cursor: pointer;
}
.tool-panel button:hover { background: #8acc1a; }
.tool-panel button.secondary {
  background: transparent;
  color: var(--fg-dim);
  border: 1px solid var(--border);
}
.tool-panel button.secondary:hover { color: var(--accent); border-color: var(--accent); }

.out-box {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.6rem;
  margin: 0.6rem 0 0;
  white-space: pre-wrap;
  max-height: 320px;
  overflow-y: auto;
  font-family: ui-monospace, "JetBrains Mono", Consolas, monospace;
  font-size: 0.86rem;
}

.status-line { font-size: 0.85rem; color: var(--fg-dim); padding: 0.4rem 0; min-height: 1.4em; }
.status-line.error { color: var(--error); }

/* ---------- Image results ---------- */

.img-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 0.6rem;
  margin-top: 0.5rem;
}
.img-grid img {
  width: 100%; height: auto;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: var(--bg-3);
  display: block;
}
.img-grid a { display: block; text-align: center; font-size: 0.76rem; color: var(--fg-dim); margin-top: 2px; }
.img-grid a:hover { color: var(--accent); }

/* ---------- Catalog (tab models) ---------- */

.catalog {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  max-height: 340px;
  overflow-y: auto;
  padding: 4px 0;
}

.catalog button {
  background: var(--bg-3);
  color: var(--fg-dim);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 4px 11px;
  font-size: 0.78rem;
  font-weight: 400;
  font-family: ui-monospace, Consolas, monospace;
}
.catalog button:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- Key panel (trang chính) ---------- */

.key-panel {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 10px 10px;
  padding: 0.9rem 1.1rem;
  margin-bottom: 0.5rem;
}
.key-panel .hint { font-size: 0.83rem; color: var(--fg-dim); margin: 0 0 0.6rem; }
.key-panel .hint code { background: var(--bg-3); padding: 1px 5px; border-radius: 4px; }
.key-panel .row { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.key-panel input {
  flex: 1; min-width: 240px;
  background: var(--bg-3);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem;
  font-family: ui-monospace, Consolas, monospace;
  font-size: 0.88rem;
}
.key-panel button {
  background: var(--accent); color: #000; border: none;
  border-radius: 6px; padding: 7px 16px; font-weight: 600; cursor: pointer;
}
.key-panel button.secondary { background: transparent; color: var(--fg-dim); border: 1px solid var(--border); }
#key-state { font-size: 0.82rem; color: var(--accent); }

.dot { font-size: 0.7rem; vertical-align: middle; }
.dot.on { color: var(--accent); }
.dot.off { color: var(--fg-dim); }

/* ---------- Admin ---------- */

main .tool-panel.narrow { max-width: 460px; margin: 2rem auto; }

.nav-link { color: var(--fg-dim); text-decoration: none; font-size: 0.88rem; }
.nav-link:hover { color: var(--accent); }

.controls #btn-logout {
  background: transparent; color: var(--fg-dim);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 6px 14px; cursor: pointer;
}
.controls #btn-logout:hover { color: var(--error); border-color: var(--error); }

.keys-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.86rem;
}
.keys-table th, .keys-table td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
}
.keys-table th { color: var(--fg-dim); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; letter-spacing: .04em; }
.keys-table td.mono { font-family: ui-monospace, Consolas, monospace; }
.keys-table td.dim { color: var(--fg-dim); font-size: 0.8rem; }

.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
}
.badge.ok { background: rgba(118,185,0,.15); color: var(--accent); }
.badge.off { background: rgba(139,145,163,.15); color: var(--fg-dim); }

button.mini {
  background: transparent; color: var(--fg-dim);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 4px 10px; margin-right: 4px; font-weight: 400; font-size: 0.8rem; cursor: pointer;
}
button.mini:hover { color: var(--accent); border-color: var(--accent); }
button.mini.danger:hover { color: var(--error); border-color: var(--error); }

/* ---------- Admin playground ---------- */

.use-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 0.75rem;
}
.use-grid section {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  min-width: 0;
}
.use-grid h4 { margin: 0 0 0.6rem; font-size: 0.92rem; color: var(--fg); }
.use-grid textarea, .use-grid input:not([type="range"]):not([type="checkbox"]) {
  width: 100%;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.5rem;
  margin-bottom: 0.5rem;
  font-family: inherit;
  resize: vertical;
}
.use-grid select {
  width: 100%;
  background: var(--bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 8px;
  margin-bottom: 0.5rem;
}
.use-grid .row { display: flex; gap: 0.5rem; align-items: center; flex-wrap: wrap; }
.use-grid .row label { margin: 0; display: flex; align-items: center; gap: 4px; font-size: 0.83rem; color: var(--fg-dim); }
.use-grid button {
  background: var(--accent); color: #000; border: none;
  border-radius: 6px; padding: 6px 14px; font-weight: 600; cursor: pointer;
}
.use-grid button:hover { background: #8acc1a; }

/* ---------- Mobile ---------- */

@media (max-width: 640px) {
  nav.tabs button { padding: 8px 10px; font-size: 0.84rem; }
  .msg { max-width: 95%; }
  .tool-panel { padding: 1rem; }
}