/* Variables & base */
:root{
  --base-font-size: 17px;           /* cỡ chữ cho cả user và bot */
  --primary-color: #007AFF;
  --primary-gradient: linear-gradient(135deg, #007BFF, #0056b3);
  --secondary-color: #F1F3F6;
  --text-dark: #222;
  --text-light: #fff;
  --border-color: #E6E9EE;
  --font-family: 'Be Vietnam Pro', sans-serif;
  --border-radius-big: 26px;
  --chatbox-width: 420px;
  --chatbox-height: 620px;
  /* --chatbox-shadow: 0 12px 32px rgba(10,20,40,0.12); -- Bỏ bóng đổ */
}

*{box-sizing:border-box}

/* --- CHANGED --- */
/* Thiết lập body để lấp đầy iframe */
html,body{
  height:100%;
  width: 100%;
  margin:0;
  padding: 0;
  overflow: hidden; /* Ngăn cuộn trang ngoài ý muốn */
}
body{
  font-family:var(--font-family);
  background:transparent;
  color:var(--text-dark);
  font-size:var(--base-font-size);
}

/* --- REMOVED --- */
/* Đã xóa hoàn toàn khối CSS cho #chat-toggle */

/* --- CHANGED --- */
/* Chatbox giờ sẽ lấp đầy toàn bộ body */
#chatbox{
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  background: var(--text-light);
  overflow: hidden;
  /* Các thuộc tính position, right, bottom, shadow, opacity, transform đã được xóa */
}

/* Header */
#chat-header{display:flex;align-items:center;gap:12px;padding:14px 16px;background:var(--primary-gradient);color:var(--text-light)}
#chat-header img{width:44px;height:44px;border-radius:50%;object-fit:cover;border:2px solid rgba(255,255,255,0.45)}
.header-text strong{display:block;font-size:1rem}
.header-text span{font-size:.9rem;opacity:.85}

/* Messages container */
#messages{
  flex:1;padding:12px 12px 10px 12px; /* giảm padding tổng thể để tăng diện tích nội dung */
  overflow-y:auto;background:#F8FAFC;display:flex;flex-direction:column;gap:10px;
  scroll-behavior: smooth; /* mượt khi tự cuộn */
}

/* Message bubble base */
.message{
  display:inline-block;
  border-radius:var(--border-radius-big);
  max-width:88%;
  min-width:56px;
  word-wrap:break-word;
  line-height:1.45;
  animation:fadeIn .22s ease;
  position:relative;
  box-shadow: 0 1px 0 rgba(0,0,0,0.02) inset;
  font-size:var(--base-font-size);
  padding:0; /* bỏ padding chung */
}

/* User bubble (right) - ôm sát hơn */
.user{
  align-self:flex-end;
  background:var(--secondary-color);
  color:var(--text-dark);
  border-bottom-right-radius:8px;
  border-bottom-left-radius:var(--border-radius-big);
  max-width:70%;
  margin-left:8px;
  padding:8px 12px; /* giảm padding để ôm sát */
}

/* Bot bubble (left) - ôm sát hơn */
.bot{
  align-self:flex-start;
  background:var(--primary-gradient);
  color:var(--text-light);
  border-radius:var(--border-radius-big);
  max-width:90%;
  box-sizing:border-box;
  margin-right:10px;
  margin-left:4px;
  padding:8px 12px; /* giảm padding để ôm sát */
}

/* Inner content (keeps layout tidy) */
.bot .content { display:block; width:100%; box-sizing:border-box; padding:0; margin:0; }

/* Typing animation */
.typing span{display:inline-block;width:8px;height:8px;background:rgba(255,255,255,0.92);border-radius:50%;margin:0 3px;animation:bounce 1.4s infinite}
.typing span:nth-child(1){animation-delay:-0.32s}
.typing span:nth-child(2){animation-delay:-0.16s}
@keyframes bounce{0%,80%,100%{transform:scale(0)}40%{transform:scale(1)}}
@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}

/* Input area - bo tròn nhiều hơn và ẩn thanh scroll */
#input-area{
  display:flex;align-items:flex-end;gap:10px;padding:12px;border-top:1px solid var(--border-color);background:var(--text-light)
}
#input{
  flex:1;padding:10px 14px;border-radius:28px;border:1px solid var(--border-color);
  background:var(--secondary-color);outline:none;resize:none;max-height:140px;font-family:var(--font-family);
  font-size:calc(var(--base-font-size) - 2px);line-height:1.3;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.3);
  overflow:auto;
  scrollbar-width: none; /* firefox */
  -ms-overflow-style: none; /* IE/Edge */
}
/* hide webkit scrollbar */
#input::-webkit-scrollbar { width:0; height:0; display:none; }
#input:focus{box-shadow:0 0 0 6px rgba(0,123,255,0.06);border-color:var(--primary-color)}
#send{
  width:44px;height:44px;border-radius:50%;border:none;background:var(--primary-color);color:#fff;cursor:pointer;
  display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:transform .12s;
}
#send:hover{transform:scale(1.03);background:#0056b3}

/* Inline code */
code{background:rgba(255,255,255,0.12);padding:3px 6px;border-radius:6px;font-family:monospace}
.user code{background:rgba(0,0,0,0.06)}

/* Tables: responsive + wrapping behavior */
.table-scroll{
  overflow-x:auto;
  -webkit-overflow-scrolling:touch;
  border-radius:12px;
  padding:6px 0;
  margin:8px 0;
  touch-action: pan-y;
  cursor: grab;
  -ms-touch-action: pan-y;
}
.table-scroll.dragging { cursor: grabbing; }
.table-scroll::-webkit-scrollbar{height:8px}
.table-scroll::-webkit-scrollbar-thumb{background:rgba(0,0,0,0.12);border-radius:8px}
.table-scroll::-webkit-scrollbar-track{background:transparent}

.message table{border-collapse:collapse;width:100%;min-width:0;table-layout:fixed;background:transparent}
.message th, .message td{
  padding:8px 10px;
  border:1px solid rgba(255,255,255,0.08);
  text-align:left;
  white-space:normal;
  word-break:break-word;
  hyphens:auto;
  font-size:calc(var(--base-font-size) - 2px);
  vertical-align:top;
}
.message th{font-weight:600;background:rgba(255,255,255,0.04)}
.message.user th,.message.user td{border-color:rgba(0,0,0,0.08);color:var(--text-dark)}
.message.user tr:nth-child(even) td{background:rgba(0,0,0,0.03)}
.message.bot th,.message.bot td{border-color:rgba(255,255,255,0.10);color:var(--text-light)}
.message.bot tr:nth-child(even) td{background:rgba(255,255,255,0.02)}
.message tr:hover td{background:rgba(0,0,0,0.04)}
.message td.break-word{white-space:normal;word-break:break-word}

/* --- REMOVED --- */
/* Đã xóa khối @media vì không còn cần thiết */

/* Accessibility focus */
#send:focus,#input:focus{outline:3px solid rgba(0,123,255,0.10)}