body {
  margin: 0; padding: 0;
  background: #11131a;
  color: #d6d8e7;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

#loader-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: #0b0f16ee;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.45s;
}
#loader-overlay.hidden { opacity: 0; pointer-events: none; }
#loader-box {
  background: #222435;
  border-radius: 20px;
  padding: 40px 36px 30px 36px;
  min-width: 320px;
  box-shadow: 0 8px 60px #000b;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
#loader-label {
  font-size: 1.15em;
  letter-spacing: 0.04em;
  color: #a5ffb7;
  margin-bottom: 10px;
}
#loader-bar-bg {
  width: 300px; height: 16px;
  background: #181925;
  border-radius: 8px;
  overflow: hidden;
  margin: 0 auto;
}
#loader-bar {
  width: 0%;
  height: 100%;
  background: #1975fa;
  border-radius: 8px 0 0 8px;
  transition: width 0.23s;
}
#loader-percent {
  font-size: 1.09em; color: #93ecff;
  font-weight: 600;
}

#topbar-model {
  position: fixed; top: 0; left: 0;
  width: 100vw;
  background: #16182b;
  border-bottom: 1px solid #232442;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  gap: 16px;
  height: 58px;
  padding: 0 22px;
  z-index: 100;
}
#topbar-model label { font-weight: 500; color: #d6d8e7; letter-spacing:0.04em; font-size:15px; }
#modelSelect {
  font-size: 14px; background: #191a2b;
  color: #a4e2ff;
  padding: 6px 24px 6px 10px; border-radius: 7px;
  border: 1px solid #333855;
}
#modelSelect:disabled { opacity: 0.5; }

#chatContainer {
  margin: 90px auto 0 auto;
  background: #181925;
  width: 100%;
  max-width: 800px;
  min-height: 72vh;
  box-shadow: 0 2px 32px #001a;
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  border: 1.5px solid #1c1d31;
}

#chat {
  flex: 1;
  overflow-y: auto;
  padding: 24px 18px 18px 18px;
  display: flex;
  flex-direction: column;
  gap: 13px;
}

.message {
  padding: 11px 18px 11px 15px;
  border-radius: 13px;
  max-width: 85%;
  font-size: 15.5px;
  word-break: break-word;
  line-height: 1.7;
  background: #25283b;
  color: #e6fffb;
  margin-bottom: 3px;
  box-shadow: 0 1px 7px #0002;
  position: relative;
}
.user {
  background: linear-gradient(97deg, #236fff 35%, #12aaefb8 140%);
  color: #fff;
  align-self: flex-end;
  border-bottom-right-radius: 2.8px;
  box-shadow: 0 0 0 2.5px #2344a5cc;
}
.bot {
  background: linear-gradient(97deg, #363b44 45%, #19467d 130%);
  color: #97e5c4;
  align-self: flex-start;
  border-bottom-left-radius: 2.8px;
  border-top: 1px solid #16607c55;
}

.message span.label {
  font-weight: 700;
  margin-right: 4px;
  color: #60e0ffcc;
  user-select: none;
}

#popup {
  position: fixed;
  top: 25px;
  left: 50%;
  transform: translateX(-50%);
  background: #2ed89e;
  color: #113027;
  font-weight: bold;
  padding: 15px 38px;
  border-radius: 12px;
  box-shadow: 0 8px 30px #0009;
  font-size: 1.18em;
  z-index: 22223;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.34s;
}
#popup.show {
  opacity: 1;
  pointer-events: auto;
}

.code-title {
  font-size: 12px;
  color: #90ebe8;
  font-style: italic;
  margin-bottom: 4px;
  display: block;
  user-select: none;
}
.bot pre {
  background: #102029;
  color: #16ffd5;
  padding: 7px 12px;
  border-radius: 6px;
  font-family: 'Consolas', monospace;
  font-size: 13.2px;
  margin-top: 7px;
  margin-bottom: 3px;
  box-shadow: 0 1px 7px #0003;
  white-space: pre-wrap;
  word-break: break-all;
}
.copy-btn {
  position: absolute;
  right: 10px; top: 8px;
  font-size: 1.11em;
  padding: 1px 8px;
  background: #2e4476;
  color: #cbffee;
  border: none;
  border-radius: 9px;
  cursor: pointer;
  opacity: 0.69;
  transition: opacity 0.13s;
}
.copy-btn:hover { opacity: 1; background:#119781; color:#fff; }

#inputArea {
  display: flex;
  align-items: flex-end;
  padding: 19px 17px;
  background: #191d2f;
  border-top: 1.5px solid #101425;
}
#userInput {
  flex: 1;
  min-height: 42px;
  height: 42px;
  max-height: 190px;
  resize: none;
  font-size: 15px;
  border-radius: 8px;
  border: 1px solid #2e3448;
  background: #232543;
  color: #e6eeff;
  padding: 8px 9px;
  outline: none;
  box-sizing: border-box;
  display: block;
}

#sendBtn {
  margin-left: 11px;
  padding: 9px 24px;
  border-radius: 7px;
  background: #1975fa;
  color: #fff;
  border: none;
  font-weight: 600;
  font-size: 17px;
  cursor: pointer;
  box-shadow: 0 1px 7px #0003;
  height: 42px;
  transition: background 0.14s;
}
#sendBtn:disabled {
  background: #222d42;
  color: #ccc;
  cursor: default;
}
#userInput:focus { border-color: #4091b3; background: #151d23; color:#9bfff5; }
#userInput:disabled { opacity: 0.8; background: #191e28; }

#sendBtn {
  margin-left: 11px;
  padding: 9px 24px;
  border-radius: 7px;
  background: linear-gradient(90deg, #1a81e6, #33f7b7);
  color: #fff;
  border: none;
  font-weight: 600;
  font-size: 17px;
  cursor: pointer;
  box-shadow: 0 1px 7px #0003;
  transition: background 0.14s;
}
#sendBtn:disabled {
  background: #40455b;
  color: #ccc;
  cursor: default;
}