/* ============ THEME TOKENS ============ */
:root, [data-theme="light"]{
  --bg:#F2F3F7;
  --surface:#FFFFFF;
  --ink:#191D27;
  --muted:#6C7385;
  --accent:#6D5EF3;
  --accent-soft:rgba(109,94,243,.14);
  --danger:#D64545;
  --danger-soft:rgba(214,69,69,.1);
  --border:rgba(25,29,39,.1);
  --bubble-them:#FFFFFF;
  --bubble-them-ink:#191D27;
  --bubble-me:#6D5EF3;
  --online:#22B96A;
  --shadow:0 8px 24px rgba(109,94,243,.32);
}
[data-theme="dark"]{
  --bg:#0F1219;
  --surface:#181C27;
  --ink:#EDEEF4;
  --muted:#8B92A6;
  --accent:#8B7DFF;
  --accent-soft:rgba(139,125,255,.16);
  --danger:#F07171;
  --danger-soft:rgba(240,113,113,.14);
  --border:rgba(237,238,244,.09);
  --bubble-them:#222738;
  --bubble-them-ink:#EDEEF4;
  --bubble-me:#6D5EF3;
  --online:#2FD57F;
  --shadow:0 8px 28px rgba(0,0,0,.5);
}

:root{
  --radius:16px;
  --font-display:"Bricolage Grotesque", sans-serif;
  --font-body:"Inter", system-ui, sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--ink);
  overscroll-behavior:none;
  transition:background .25s ease, color .25s ease;
}

.screen{display:none;height:100dvh}
.screen.active{display:flex;flex-direction:column}
.muted{color:var(--muted)}

/* ============ THEME TOGGLE ============ */
.theme-toggle{
  position:fixed;top:14px;right:14px;z-index:50;
  width:42px;height:42px;border-radius:50%;
  border:1px solid var(--border);background:var(--surface);
  font-size:18px;cursor:pointer;
  box-shadow:0 2px 8px rgba(0,0,0,.08);
}

/* ============ HOME ============ */
#screen-home.active{align-items:center;justify-content:center}
.home-wrap{max-width:560px;padding:32px;text-align:center}
.brand{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--font-display);font-weight:700;font-size:15px;
  letter-spacing:.04em;text-transform:uppercase;color:var(--muted);
  margin-bottom:28px;
}
.brand-dot{width:10px;height:10px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 0 4px var(--accent-soft)}
.home-wrap h1{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(40px,8vw,64px);line-height:1.02;letter-spacing:-.02em;
  margin-bottom:16px;
}
.tagline{color:var(--muted);font-size:15px;margin-bottom:26px}
.rules{margin-top:28px;font-size:12.5px;color:var(--muted);line-height:1.6}

.online-pill{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--surface);border:1px solid var(--border);
  border-radius:999px;padding:8px 18px;margin-bottom:26px;
  font-size:14px;color:var(--muted);
}
.online-pill b{color:var(--ink)}
.pulse{
  width:9px;height:9px;border-radius:50%;background:var(--online);
  animation:pulse 1.8s ease-out infinite;
}
@keyframes pulse{
  0%{box-shadow:0 0 0 0 rgba(34,185,106,.5)}
  70%{box-shadow:0 0 0 9px rgba(34,185,106,0)}
  100%{box-shadow:0 0 0 0 rgba(34,185,106,0)}
}

.btn-primary{
  display:block;margin:0 auto;
  font-family:var(--font-display);font-weight:700;font-size:18px;
  background:var(--accent);color:#fff;
  border:none;border-radius:999px;padding:16px 44px;cursor:pointer;
  transition:transform .12s ease;
  box-shadow:var(--shadow);
}
.btn-primary:hover{transform:translateY(-2px)}
.btn-primary:disabled{opacity:.6;transform:none;cursor:default}
.btn-primary:focus-visible,button:focus-visible,input:focus-visible{
  outline:3px solid var(--accent-soft);outline-offset:2px}

/* ============ SEARCHING ============ */
#screen-searching.active{align-items:center;justify-content:center}
.search-wrap{text-align:center;padding:32px}
.search-wrap h2{font-family:var(--font-display);font-weight:700;font-size:26px;margin:24px 0 6px}
.orbit{position:relative;width:90px;height:90px;margin:0 auto}
.dot{position:absolute;top:35px;width:20px;height:20px;border-radius:50%}
.dot-a{left:8px;background:var(--accent);animation:pulseA 1.4s ease-in-out infinite}
.dot-b{right:8px;background:var(--muted);animation:pulseB 1.4s ease-in-out infinite}
@keyframes pulseA{0%,100%{transform:translateX(0)}50%{transform:translateX(18px) scale(1.15)}}
@keyframes pulseB{0%,100%{transform:translateX(0)}50%{transform:translateX(-18px) scale(1.15)}}
@media (prefers-reduced-motion: reduce){.dot,.pulse,.msg{animation:none !important}}
.btn-ghost{
  margin-top:28px;background:none;border:1.5px solid var(--muted);
  color:var(--muted);border-radius:999px;padding:10px 28px;
  font-family:var(--font-body);font-weight:600;font-size:14px;cursor:pointer;
}

/* ============ CHAT ============ */
.chat-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:10px 60px 10px 16px;background:var(--surface);
  border-bottom:1px solid var(--border);
}
.peer{display:flex;align-items:center;gap:10px;font-weight:600;font-size:15px}
.peer-text{display:flex;flex-direction:column;line-height:1.25}
.peer-text small{font-size:12px;font-weight:500}
.status-dot{width:9px;height:9px;border-radius:50%;background:var(--muted);flex-shrink:0}
.status-dot.online{background:var(--online)}
.header-actions{display:flex;gap:8px}
.btn-small{
  border:none;border-radius:999px;padding:8px 16px;cursor:pointer;
  font-family:var(--font-body);font-weight:600;font-size:13px;
  background:var(--bg);color:var(--ink);
}
.btn-small.danger{background:var(--danger-soft);color:var(--danger)}

.messages{
  flex:1;overflow-y:auto;padding:16px;
  display:flex;flex-direction:column;gap:8px;
}
.msg{
  max-width:76%;padding:10px 14px;font-size:15px;line-height:1.45;
  border-radius:var(--radius);word-wrap:break-word;white-space:pre-wrap;
  animation:msgIn .18s ease;
}
@keyframes msgIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.msg.them{align-self:flex-start;background:var(--bubble-them);color:var(--bubble-them-ink);
  border-bottom-left-radius:4px;box-shadow:0 1px 2px rgba(0,0,0,.06)}
.msg.me{align-self:flex-end;background:var(--bubble-me);color:#fff;
  border-bottom-right-radius:4px}
.msg.system{
  align-self:center;background:none;color:var(--muted);
  font-size:12.5px;font-weight:500;padding:4px 0;text-align:center;
}

.typing{
  padding:0 16px 6px;font-size:12.5px;color:var(--muted);
  display:flex;align-items:center;gap:3px;
}
.typing span{
  width:5px;height:5px;border-radius:50%;background:var(--muted);
  animation:blink 1.2s infinite;
}
.typing span:nth-child(2){animation-delay:.2s}
.typing span:nth-child(3){animation-delay:.4s;margin-right:6px}
@keyframes blink{0%,80%,100%{opacity:.25}40%{opacity:1}}

.composer{
  display:flex;gap:8px;padding:10px 12px calc(10px + env(safe-area-inset-bottom));
  background:var(--surface);border-top:1px solid var(--border);
}
.composer input{
  flex:1;border:1.5px solid var(--border);border-radius:999px;
  padding:12px 18px;font-size:16px;font-family:var(--font-body);
  background:var(--bg);color:var(--ink);
}
.composer input:disabled{opacity:.5}
.composer button{
  width:46px;height:46px;border:none;border-radius:50%;
  background:var(--accent);color:#fff;font-size:17px;cursor:pointer;
  flex-shrink:0;
}
.composer button:disabled{opacity:.4;cursor:default}