:root {
  --bg: #0d0d0d;
  --bg-elev: #161616;
  --sidebar: #131313;
  --border: #262626;
  --border-soft: #1f1f1f;
  --text: #ececec;
  --text-dim: #a1a1aa;
  --user-bubble: #262626;
  --accent: #e8e8e8;
  --avatar-grad: linear-gradient(135deg, #3a3a3a, #1c1c1c);
}

/* Subtle glow theme toggle */
html.kvk-glow {
  --accent: #a78bfa;
  --avatar-grad: linear-gradient(135deg, #6d5bd0, #2a2350);
}

* { box-sizing: border-box; }

html, body, #root {
  height: 100%;
  margin: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Space Grotesk', -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

.kvk-app {
  background:
    radial-gradient(900px 500px at 100% -10%, rgba(120,120,140,0.05), transparent 60%),
    var(--bg);
}

/* ---------- Scrollbars ---------- */
.kvk-scroll::-webkit-scrollbar { width: 8px; }
.kvk-scroll::-webkit-scrollbar-thumb { background: #2c2c2c; border-radius: 8px; }
.kvk-scroll::-webkit-scrollbar-thumb:hover { background: #3a3a3a; }
.kvk-scroll::-webkit-scrollbar-track { background: transparent; }

/* ---------- Header ---------- */
.kvk-header {
  border-bottom: 1px solid var(--border-soft);
  backdrop-filter: blur(8px);
  background: rgba(13,13,13,0.7);
  z-index: 20;
}
.kvk-brand {
  font-weight: 600;
  letter-spacing: -0.01em;
  display: flex;
  align-items: baseline;
}
.kvk-bracket { color: var(--accent); font-weight: 300; opacity: 0.85; }
.kvk-brand-tail { color: var(--text-dim); font-weight: 400; margin-left: 0.5px; }

.kvk-iconbtn {
  display: grid;
  place-items: center;
  width: 38px; height: 38px;
  border-radius: 10px;
  color: var(--text-dim);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all 200ms ease-in-out;
}
.kvk-iconbtn:hover { background: #1e1e1e; color: var(--text); }

/* ---------- Settings menu ---------- */
.kvk-menu {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  box-shadow: 0 12px 40px rgba(0,0,0,0.6);
  animation: kvk-pop 160ms ease-out;
}
@keyframes kvk-pop { from { opacity: 0; transform: translateY(-6px) scale(0.98); } to { opacity: 1; transform: none; } }
.kvk-menu-item {
  width: 100%;
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px;
  font-size: 13.5px;
  color: var(--text-dim);
  background: transparent; border: none; cursor: pointer;
  transition: background 200ms ease-in-out, color 200ms ease-in-out;
}
.kvk-menu-item:hover { background: #202020; color: var(--text); }
.kvk-menu-danger:hover { color: #f87171; }
.kvk-menu-about {
  padding: 12px 14px;
  font-size: 11px;
  line-height: 1.5;
  color: #6b6b6b;
  border-top: 1px solid var(--border-soft);
}

/* ---------- Sidebar ---------- */
.kvk-sidebar {
  background: var(--sidebar);
  border-right: 1px solid var(--border-soft);
  height: 100%;
  transition: transform 200ms ease-in-out;
  z-index: 45;
}
.kvk-newchat {
  color: var(--text);
  background: #1c1c1c;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 200ms ease-in-out;
}
.kvk-newchat:hover { background: #262626; border-color: #333; }

.kvk-histitem {
  color: var(--text-dim);
  transition: background 200ms ease-in-out, color 200ms ease-in-out;
  margin-bottom: 1px;
}
.kvk-histitem:hover { background: #1c1c1c; color: var(--text); }
.kvk-histitem-active { background: #232323; color: var(--text); }
.kvk-delbtn {
  color: #6b6b6b;
  background: transparent; border: none; cursor: pointer;
  display: grid; place-items: center; padding: 2px;
  transition: color 200ms ease-in-out, opacity 200ms ease-in-out;
}
.kvk-delbtn:hover { color: #f87171; }
.kvk-guest {
  background: var(--avatar-grad);
  color: #fff;
}

.kvk-backdrop {
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(2px);
  transition: opacity 200ms ease-in-out;
}

/* ---------- Avatars ---------- */
.kvk-avatar {
  background: var(--avatar-grad);
  color: #f0f0f0;
  border: 1px solid rgba(255,255,255,0.06);
}
.kvk-hero-avatar {
  width: 60px; height: 60px;
  background: var(--avatar-grad);
  color: #f0f0f0;
  border: 1px solid rgba(255,255,255,0.07);
  box-shadow: 0 0 40px rgba(120,110,160,0.12);
}
.kvk-hero-title {
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text);
}

/* ---------- Chips ---------- */
.kvk-chip {
  background: #161616;
  border: 1px solid var(--border-soft);
  color: var(--text-dim);
  cursor: pointer;
  transition: all 200ms ease-in-out;
  animation: kvk-fade-up 400ms ease-out both;
}
.kvk-chip:hover { background: #1e1e1e; border-color: #333; color: var(--text); transform: translateY(-1px); }

/* ---------- Messages ---------- */
.kvk-user-bubble {
  background: var(--user-bubble);
  border-radius: 18px 18px 4px 18px;
  padding: 11px 16px;
  font-size: 15px;
  line-height: 1.55;
  color: var(--text);
}

.kvk-fade-in { animation: kvk-fade-up 220ms ease-in-out both; }
@keyframes kvk-fade-up { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* Blinking cursor before first token */
.kvk-cursor {
  display: inline-block;
  width: 8px; height: 17px;
  background: var(--text-dim);
  border-radius: 1px;
  animation: kvk-blink 1s step-start infinite;
}
@keyframes kvk-blink { 50% { opacity: 0; } }

/* Thinking dots */
.kvk-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--text-dim);
  display: inline-block;
  animation: kvk-bounce 1.2s ease-in-out infinite;
}
@keyframes kvk-bounce {
  0%, 60%, 100% { transform: translateY(0); opacity: 0.4; }
  30% { transform: translateY(-5px); opacity: 1; }
}

/* ---------- Input ---------- */
.kvk-inputwrap {
  background: linear-gradient(to top, var(--bg) 55%, transparent);
  z-index: 15;
}
.kvk-inputbox {
  background: #1a1a1a;
  border: 1px solid var(--border);
  border-radius: 20px;
  transition: border-color 200ms ease-in-out, box-shadow 200ms ease-in-out;
}
.kvk-inputbox:focus-within {
  border-color: #3a3a3a;
  box-shadow: 0 0 0 3px rgba(120,120,130,0.08);
}
.kvk-textarea {
  color: var(--text);
  font-family: 'Space Grotesk', sans-serif;
  font-size: 15px;
  line-height: 1.5;
  max-height: 200px;
}
.kvk-textarea::placeholder { color: #5a5a5a; }

.kvk-sendbtn {
  display: grid; place-items: center;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  color: #6b6b6b;
  background: #262626;
  transition: all 200ms ease-in-out;
  flex-shrink: 0;
}
.kvk-sendbtn:disabled { cursor: default; }
.kvk-sendbtn-active {
  background: var(--accent);
  color: #0d0d0d;
}
.kvk-sendbtn-active:hover { transform: scale(1.06); }
.kvk-stopbtn {
  background: #f0f0f0;
  color: #0d0d0d;
}
.kvk-stopbtn:hover { transform: scale(1.06); }

/* ============================================================
 *  Markdown styling (dark theme)
 * ============================================================ */
.kvk-md {
  font-size: 15px;
  line-height: 1.68;
  color: var(--text);
  word-wrap: break-word;
}
.kvk-md > *:first-child { margin-top: 0; }
.kvk-md > *:last-child { margin-bottom: 0; }
.kvk-md h1, .kvk-md h2, .kvk-md h3 {
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 1.3em 0 0.5em;
  line-height: 1.3;
}
.kvk-md h1 { font-size: 1.5em; }
.kvk-md h2 { font-size: 1.3em; }
.kvk-md h3 { font-size: 1.12em; }
.kvk-md p { margin: 0.7em 0; }
.kvk-md strong { color: #fff; font-weight: 600; }
.kvk-md em { color: #d4d4d8; }
.kvk-md a { color: #93c5fd; text-decoration: underline; text-underline-offset: 2px; }
.kvk-md ul, .kvk-md ol { margin: 0.7em 0; padding-left: 1.4em; }
.kvk-md li { margin: 0.3em 0; }
.kvk-md ul li::marker { color: var(--text-dim); }
.kvk-md blockquote {
  border-left: 3px solid #3a3a3a;
  margin: 0.9em 0;
  padding: 0.2em 0 0.2em 1em;
  color: var(--text-dim);
  font-style: italic;
}
.kvk-md hr { border: none; border-top: 1px solid var(--border); margin: 1.4em 0; }

/* inline code */
.kvk-md code {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.86em;
  background: #202020;
  padding: 0.15em 0.4em;
  border-radius: 5px;
  color: #e6c07b;
}

/* code blocks */
.kvk-md pre {
  position: relative;
  background: #0f0f0f !important;
  border: 1px solid var(--border);
  border-radius: 12px;
  margin: 1em 0;
  overflow: hidden;
}
.kvk-md pre code {
  display: block;
  background: transparent !important;
  color: #e4e4e7;
  padding: 14px 16px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.6;
  border-radius: 0;
}
.kvk-codebar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 12px 7px 14px;
  background: #171717;
  border-bottom: 1px solid var(--border);
}
.kvk-codelang {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: #7a7a7a;
  text-transform: lowercase;
  letter-spacing: 0.03em;
}
.kvk-copybtn {
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: #8a8a8a;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 3px 6px;
  border-radius: 6px;
  transition: all 200ms ease-in-out;
}
.kvk-copybtn:hover { background: #262626; color: var(--text); }
.kvk-copybtn.kvk-copied { color: #4ade80; }

/* tables */
.kvk-md table {
  width: 100%;
  border-collapse: collapse;
  margin: 1em 0;
  font-size: 14px;
  overflow: hidden;
  border-radius: 10px;
  border: 1px solid var(--border);
}
.kvk-md th, .kvk-md td {
  padding: 9px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border-soft);
}
.kvk-md th {
  background: #191919;
  font-weight: 600;
  color: var(--text);
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.kvk-md tr:last-child td { border-bottom: none; }
.kvk-md tbody tr:hover { background: #151515; }

/* mobile tweaks */
@media (max-width: 640px) {
  .kvk-user-bubble { max-width: 85%; }
  .kvk-md { font-size: 14.5px; }
}
</parameter>