* { box-sizing: border-box; }
:root { --c1: #25F4EE; --c2: #FE2C55; }
body { margin: 0; font-family: 'Bricolage Grotesque', sans-serif; overflow: hidden; background: #0a0a0f; }

.app {
  --bg: #0a0a0f; --panel: #15151f; --panel2: #1c1c28; --text: #f1f1f5; --muted: #8a8a9a; --border: #262634;
  display: flex; height: 100vh; height: 100dvh; color: var(--text); position: relative; overflow: hidden;
  background:
    radial-gradient(circle at 10% 0%, color-mix(in srgb, var(--c1) 14%, transparent), transparent 40%),
    radial-gradient(circle at 100% 100%, color-mix(in srgb, var(--c2) 14%, transparent), transparent 45%),
    repeating-linear-gradient(115deg, rgba(255,255,255,0.012) 0 3px, transparent 3px 11px),
    var(--bg);
}
.app.light {
  --bg: #f4f4f8; --panel: #ffffffcc; --panel2: #eceef3; --text: #1a1a2e; --muted: #6b6b7b; --border: #dcdce4;
}
.x-watermark {
  position: absolute; right: -6vw; top: -10vh; font-family: 'Kaushan Script', cursive; font-size: 80vh; line-height: 1;
  color: var(--text); opacity: 0.025; pointer-events: none; transform: rotate(-8deg); z-index: 0;
}

.xen-logo, .split-title, .hero-title {
  font-family: 'Kaushan Script', cursive;
  background: linear-gradient(180deg, #ffffff, #b8b8c4 60%, #ffffff);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  filter: drop-shadow(-2px 0 0 var(--c1)) drop-shadow(2px 0 0 var(--c2));
}
.light .xen-logo, .light .split-title, .light .hero-title { background: linear-gradient(180deg, #2a2a3a, #555566); -webkit-background-clip: text; background-clip: text; }
.crown { margin-bottom: -4px; transition: filter .3s; }
.crown-flash { animation: crownflash 1.2s ease; }
@keyframes crownflash { 0%,100% { filter: none; transform: scale(1); } 40% { filter: drop-shadow(0 0 8px var(--c1)) drop-shadow(0 0 14px var(--c2)); transform: scale(1.35) rotate(-8deg); } }

.sidebar {
  width: 280px; display: flex; flex-direction: column; background: var(--panel); border-right: 1px solid var(--border);
  backdrop-filter: blur(14px); z-index: 40; transition: transform .3s;
}
@media (max-width: 767px) { .sidebar { position: fixed; inset: 0 auto 0 0; transform: translateX(-100%); } .sidebar.open { transform: none; } }
.scrim { position: fixed; inset: 0; background: rgba(0,0,0,.55); z-index: 30; }
.chat-item {
  display: flex; align-items: center; gap: 8px; padding: 10px 12px; border-radius: 12px; cursor: pointer; position: relative;
  transition: background .2s;
}
.chat-item:hover { background: var(--panel2); }
.chat-item.active { background: var(--panel2); }
.chat-item.active::before { content: ''; position: absolute; left: 0; top: 8px; bottom: 8px; width: 3px; border-radius: 3px; background: linear-gradient(var(--c1), var(--c2)); box-shadow: 0 0 10px var(--c2); }
.chat-item .del { opacity: 0; color: var(--muted); transition: .2s; }
.chat-item:hover .del { opacity: 1; }
.chat-item .del:hover { color: var(--c2); }
.side-foot { padding: 12px; font-size: 12px; text-align: center; color: var(--muted); border-top: 1px solid var(--border); }
.side-foot a:hover { color: var(--c1); }

.main { flex: 1; display: flex; flex-direction: column; min-width: 0; z-index: 1; }
.header {
  display: flex; align-items: center; justify-content: space-between; padding: 10px 16px;
  border-bottom: 1px solid var(--border); background: var(--panel); backdrop-filter: blur(14px);
}
.icon-btn { padding: 8px; border-radius: 10px; color: var(--muted); transition: .2s; }
.icon-btn:hover { color: var(--text); background: var(--panel2); }
.hover-pink:hover { color: var(--c2); }
.gear:hover svg { transform: rotate(90deg); }
.gear svg { transition: transform .4s; }
.status-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--muted); }
.status-dot.ok { background: var(--c1); box-shadow: 0 0 8px var(--c1); }
.status-dot.busy { background: var(--c1); animation: pulse 1s infinite; }
.status-dot.error { background: var(--c2); box-shadow: 0 0 8px var(--c2); }
@keyframes pulse { 50% { opacity: .3; } }

.neon-btn {
  padding: 9px 16px; border-radius: 12px; font-weight: 700; color: #fff;
  background: linear-gradient(100deg, var(--c1), var(--c2)); text-shadow: 0 1px 2px rgba(0,0,0,.35);
  box-shadow: 0 0 14px color-mix(in srgb, var(--c2) 40%, transparent); transition: transform .15s, box-shadow .2s;
}
.neon-btn:hover { transform: scale(1.03); box-shadow: 0 0 22px color-mix(in srgb, var(--c2) 60%, transparent); }
.neon-outline {
  display: flex; align-items: center; gap: 6px; padding: 7px 14px; border-radius: 12px; font-weight: 600; font-size: 14px;
  border: 1.5px solid transparent; background: linear-gradient(var(--panel), var(--panel)) padding-box, linear-gradient(100deg, var(--c1), var(--c2)) border-box;
  transition: transform .15s;
}
.neon-outline:hover { transform: scale(1.03); }
.ghost-btn { padding: 8px 14px; border-radius: 12px; background: var(--panel2); border: 1px solid var(--border); font-weight: 600; }
.ghost-btn:hover { border-color: var(--c1); }
.danger-btn { padding: 8px 14px; border-radius: 12px; background: var(--c2); color: #fff; font-weight: 700; }

.messages { flex: 1; overflow-y: auto; padding: 24px 16px; scrollbar-width: thin; scrollbar-color: var(--c2) transparent; }
.msg-row { display: flex; gap: 10px; margin: 0 auto 18px; max-width: 900px; animation: rise .35s ease both; align-items: flex-start; }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } }
.msg { max-width: 82%; padding: 12px 16px; border-radius: 16px; line-height: 1.6; min-width: 0; }
.msg-user { background: linear-gradient(135deg, #FF2D8A, #7c3aed); color: #fff; border-bottom-right-radius: 4px; box-shadow: 0 6px 20px rgba(255,45,138,.25); }
.msg-ai { background: color-mix(in srgb, var(--panel) 80%, transparent); border: 1px solid color-mix(in srgb, var(--c1) 30%, transparent); backdrop-filter: blur(10px); border-bottom-left-radius: 4px; }
.light .msg-ai { background: #fff; }
.msg-error { border-color: var(--c2); }
.ai-name { font-family: 'Kaushan Script', cursive; color: var(--c1); font-size: 15px; margin-bottom: 2px; }
.msg-actions { display: flex; align-items: center; gap: 10px; margin-top: 6px; font-size: 11px; opacity: 0; transition: opacity .2s; }
.msg:hover .msg-actions, .msg-error .msg-actions { opacity: .75; }
.msg-actions button:hover { color: var(--c1); }
.msg-actions .retry { display: flex; gap: 4px; align-items: center; color: var(--c2); font-weight: 700; }
.usage { font-family: 'JetBrains Mono', monospace; }
.edit-area { width: 100%; min-width: 260px; padding: 8px; border-radius: 10px; background: rgba(0,0,0,.25); color: inherit; border: 1px solid rgba(255,255,255,.3); }

.avatar-ring { flex-shrink: 0; border-radius: 50%; padding: 2px; background: conic-gradient(var(--c1), var(--c2), var(--c1)); box-shadow: 0 0 10px color-mix(in srgb, var(--c2) 40%, transparent); }
.avatar-ring.spinning { animation: spin 1.6s linear infinite; }
.avatar-ring.spinning .avatar-img { animation: spin 1.6s linear infinite reverse; }
@keyframes spin { to { transform: rotate(360deg); } }
.avatar-img { width: 100%; height: 100%; border-radius: 50%; object-fit: cover; background: #000; display: block; }

.typing { display: flex; align-items: center; gap: 6px; padding: 12px 16px; border-radius: 16px; background: var(--panel); border: 1px solid var(--border); }
.dot { width: 8px; height: 8px; border-radius: 50%; animation: bounce 1.2s infinite, cyc 1.2s infinite; }
.dot:nth-child(2) { animation-delay: .15s; } .dot:nth-child(3) { animation-delay: .3s; }
@keyframes bounce { 0%,60%,100% { transform: none; } 30% { transform: translateY(-7px); } }
@keyframes cyc { 0% { background: var(--c1); } 50% { background: #fff; } 100% { background: var(--c2); } }
.typing-txt { margin-left: 6px; font-size: 13px; color: var(--muted); font-style: italic; }

.prose-x p { margin: 0 0 .55em; } .prose-x p:last-child { margin: 0; }
.prose-x ul { list-style: disc; padding-left: 1.4em; margin-bottom: .5em; }
.prose-x ol { list-style: decimal; padding-left: 1.4em; margin-bottom: .5em; }
.prose-x h1, .prose-x h2, .prose-x h3 { font-weight: 800; margin: .8em 0 .3em; color: var(--c1); }
.prose-x h1 { font-size: 1.4em; } .prose-x h2 { font-size: 1.2em; }
.prose-x strong { color: var(--c2); }
.prose-x a { color: var(--c1); text-decoration: underline; }
.prose-x code { font-family: 'JetBrains Mono', monospace; font-size: .85em; padding: 1px 6px; border-radius: 6px; background: color-mix(in srgb, var(--c2) 18%, transparent); }
.prose-x blockquote { border-left: 3px solid var(--c2); padding-left: 12px; opacity: .8; font-style: italic; }
.prose-x table { border-collapse: collapse; margin: .5em 0; } .prose-x td, .prose-x th { border: 1px solid var(--border); padding: 4px 8px; }

.code-wrap { border-radius: 12px; overflow: hidden; border: 1px solid #2a2a3a; background: #0d0d14; }
.code-head { display: flex; justify-content: space-between; align-items: center; padding: 6px 10px; background: #15151f; border-bottom: 1px solid #2a2a3a; }
.code-lang { font-family: 'JetBrains Mono', monospace; font-size: 11px; color: var(--c1); text-transform: uppercase; letter-spacing: .1em; }
.code-wrap pre { margin: 0; padding: 14px; overflow-x: auto; }
.code-wrap code { font-family: 'JetBrains Mono', monospace; font-size: 13px; background: transparent !important; padding: 0 !important; color: #e6e6ef; }
.mini-btn { display: flex; align-items: center; gap: 4px; font-size: 12px; padding: 3px 8px; border-radius: 7px; background: #23233a; color: #ccc; }
.mini-btn:hover { color: #fff; }
.launch-btn { font-size: 12px; font-weight: 800; padding: 3px 10px; border-radius: 7px; color: #fff; background: linear-gradient(90deg, var(--c1), var(--c2)); animation: glow 1.8s ease-in-out infinite; }
@keyframes glow { 50% { box-shadow: 0 0 14px var(--c2), 0 0 4px var(--c1); } }

.composer-wrap { padding: 12px 16px 16px; }
.composer {
  max-width: 900px; margin: 0 auto; display: flex; align-items: flex-end; gap: 8px; padding: 8px 8px 8px 16px;
  border-radius: 18px; background: var(--panel); border: 1px solid var(--border); transition: .25s; backdrop-filter: blur(12px);
}
.composer:focus-within { border-color: transparent; box-shadow: 0 0 0 1.5px var(--c1), 0 0 22px color-mix(in srgb, var(--c2) 35%, transparent); }
.composer textarea { flex: 1; resize: vertical; min-height: 44px; max-height: 260px; background: transparent; color: var(--text); outline: none; padding: 8px 0; font: inherit; font-size: 16px; }
.send-btn {
  width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center; color: #fff; background: #111;
  box-shadow: -2px 0 0 var(--c1), 2px 0 0 var(--c2); transition: .2s; flex-shrink: 0;
}
.light .send-btn { background: #1a1a2e; }
.send-btn:not(:disabled):hover { transform: scale(1.08) rotate(-8deg); box-shadow: -3px 0 0 var(--c1), 3px 0 0 var(--c2), 0 0 18px var(--c2); }
.send-btn:disabled { opacity: .35; cursor: not-allowed; }
.hint { max-width: 900px; margin: 6px auto 0; display: flex; justify-content: space-between; font-size: 11px; color: var(--muted); }

.empty { display: flex; flex-direction: column; align-items: center; justify-content: center; min-height: 100%; padding: 20px; }
.hero-ring { width: 160px; height: 160px; border-radius: 50%; padding: 4px; background: conic-gradient(var(--c1), var(--c2), var(--c1)); box-shadow: 0 0 40px color-mix(in srgb, var(--c2) 45%, transparent), 0 0 80px color-mix(in srgb, var(--c1) 25%, transparent); animation: float 4s ease-in-out infinite; }
.hero-ring img { width: 100%; height: 100%; border-radius: 50%; object-fit: cover; background: #000; }
@keyframes float { 50% { transform: translateY(-10px); } }
.hero-title { font-size: clamp(2.4rem, 7vw, 4.5rem); margin-top: 18px; line-height: 1.1; text-align: center; }
.starter { padding: 10px 16px; border-radius: 999px; font-size: 14px; background: var(--panel); border: 1px solid var(--border); animation: rise .5s ease both; transition: .2s; }
.starter:hover { border-color: var(--c1); box-shadow: 0 0 14px color-mix(in srgb, var(--c1) 40%, transparent); transform: translateY(-2px); }

.overlay { position: fixed; inset: 0; background: rgba(0,0,0,.6); z-index: 50; display: flex; justify-content: flex-end; animation: fade .2s; }
.overlay.center { justify-content: center; align-items: center; padding: 16px; }
@keyframes fade { from { opacity: 0; } }
.drawer { width: min(440px, 100%); height: 100%; background: var(--bg); border-left: 1px solid var(--border); display: flex; flex-direction: column; animation: slidein .3s ease; }
@keyframes slidein { from { transform: translateX(100%); } }
.drawer-head, .drawer-foot { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 14px 20px; border-bottom: 1px solid var(--border); }
.drawer-foot { border-top: 1px solid var(--border); border-bottom: none; }
.card { padding: 14px; border-radius: 14px; background: var(--panel2); border: 1px solid var(--border); }
.sec-title { font-weight: 800; font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: var(--c1); }
.field-label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 4px; font-weight: 600; }
.val { font-family: 'JetBrains Mono', monospace; font-size: 12px; color: var(--c2); }
.inp { width: 100%; padding: 9px 11px; border-radius: 10px; background: var(--bg); border: 1px solid var(--border); color: var(--text); outline: none; font: inherit; font-size: 14px; }
.inp:focus { border-color: var(--c1); box-shadow: 0 0 0 3px color-mix(in srgb, var(--c1) 18%, transparent); }
.mode-switch { position: relative; display: grid; grid-template-columns: 1fr 1fr; padding: 4px; border-radius: 14px; background: var(--panel2); border: 1px solid var(--border); }
.mode-switch button { position: relative; z-index: 1; padding: 9px; font-weight: 700; }
.mode-switch .thumb { position: absolute; top: 4px; bottom: 4px; left: 4px; width: calc(50% - 4px); border-radius: 10px; background: var(--c1); box-shadow: 0 0 14px var(--c1); opacity: .35; transition: .3s; }
.mode-switch.local .thumb { left: 50%; background: var(--c2); box-shadow: 0 0 14px var(--c2); }
.toggle { width: 46px; height: 26px; border-radius: 99px; background: var(--border); position: relative; transition: .25s; }
.toggle span { position: absolute; top: 3px; left: 3px; width: 20px; height: 20px; border-radius: 50%; background: #fff; transition: .25s; }
.toggle.on { background: linear-gradient(90deg, var(--c1), var(--c2)); }
.toggle.on span { left: 23px; }
.neon-range { -webkit-appearance: none; appearance: none; width: 100%; height: 6px; border-radius: 6px; background: linear-gradient(90deg, var(--c1), var(--c2)) 0/var(--p) 100% no-repeat, var(--border); }
.neon-range::-webkit-slider-thumb { -webkit-appearance: none; width: 16px; height: 16px; border-radius: 50%; background: #fff; box-shadow: 0 0 8px var(--c2); cursor: pointer; }
.neon-range::-moz-range-thumb { width: 16px; height: 16px; border-radius: 50%; background: #fff; border: none; box-shadow: 0 0 8px var(--c2); }
.accent-chip { padding: 6px 12px; border-radius: 99px; font-size: 12px; font-weight: 700; border: 1.5px solid var(--border); background: linear-gradient(90deg, color-mix(in srgb, var(--a) 20%, transparent), color-mix(in srgb, var(--b) 20%, transparent)); }
.accent-chip.active { border-color: var(--a); box-shadow: 0 0 10px var(--b); }
.confirm { width: 100%; max-width: 360px; padding: 24px; border-radius: 18px; background: var(--bg); border: 1px solid var(--c2); box-shadow: 0 0 30px color-mix(in srgb, var(--c2) 30%, transparent); text-align: center; animation: rise .25s; }

@media (max-width: 640px) { .msg { max-width: 88%; } .msg-row > .avatar-ring { display: none; } }