:root {
  --bg: #ffffff;
  --text: #111111;
  --muted: #666666;
  --user-bg: #d1e7dd; /* hijau muda */
  --bot-bg: #f5f5f5;  /* abu muda */
  --border: #dddddd;
  --primary: #0d6efd;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --text: #e6e6e6;
    --muted: #aaaaaa;
    --user-bg: #0d6efd; /* biru */
    --bot-bg: #262626;  /* abu tua */
    --border: #3a3a3a;
    --primary: #5aa0ff;
  }
}

[data-theme="light"] {
  --bg: #ffffff;
  --text: #111111;
  --muted: #666666;
  --user-bg: #d1e7dd;
  --bot-bg: #f5f5f5;
  --border: #dddddd;
  --primary: #0d6efd;
}

[data-theme="dark"] {
  --bg: #121212;
  --text: #e6e6e6;
  --muted: #aaaaaa;
  --user-bg: #0d6efd;
  --bot-bg: #262626;
  --border: #3a3a3a;
  --primary: #5aa0ff;
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  background: var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
}

header {
  text-align: center;
  padding: 16px 12px 12px;
  border-bottom: 1px solid var(--border);
  position: relative;
}

header h1 {
  margin: 0;
  font-size: 1.5rem;
  line-height: 1.2;
}

header p {
  margin: 6px 0 0;
  font-size: 0.95rem;
  color: var(--muted);
}

header #toggleDarkMode {
  position: absolute;
  right: 12px;
  top: 12px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  border-radius: 999px;
  padding: 6px 10px;
  cursor: pointer;
}

@media (max-width: 480px) {
  header #toggleDarkMode {
    position: static;
    display: inline-block;
    margin-top: 10px;
  }
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px;
}

#chatBox {
  flex: 1;
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg);
  padding: 10px;
  overflow-y: auto;
}

/* Bubbles */
.message {
  position: relative;
  margin: 8px 0;
  padding: 10px 12px;
  border-radius: 14px;
  max-width: min(80%, 780px);
  line-height: 1.5;
  word-wrap: break-word;
}

.message.user {
  background: var(--user-bg);
  color: #000; /* default */
  margin-left: auto;
  text-align: right;
  border-bottom-right-radius: 6px;
}
[data-theme="dark"] .message.user { color: #fff; }

.message.bot {
  background: var(--bot-bg);
  color: var(--text);
  margin-right: auto;
  text-align: left;
  border-bottom-left-radius: 6px;
}

/* Copy button on bot bubble */
.copy-btn {
  position: absolute;
  top: 6px;
  right: 8px;
  font-size: 12px;
  border: 1px solid var(--border);
  background: transparent;
  color: inherit;
  border-radius: 8px;
  padding: 2px 6px;
  cursor: pointer;
  opacity: 0.85;
}
.copy-btn:hover { opacity: 1; }

/* Typing indicator */
.typing {
  opacity: 0.8;
  font-style: italic;
}

/* Markdown basics */
.message pre {
  background: #1f1f1f;
  color: #eee;
  padding: 10px;
  border-radius: 8px;
  overflow-x: auto;
}
[data-theme="light"] .message pre {
  background: #272822;
  color: #f8f8f2;
}

.message code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  background: rgba(127,127,127,.18);
  padding: 2px 4px;
  border-radius: 4px;
}

/* Tabel responsif (scroll horizontal) */
.message table {
  border-collapse: collapse;
  font-size: 0.95rem;
  margin-top: 8px;
  display: block;        /* memungkinkan overflow */
  overflow-x: auto;      /* scroll horizontal */
  white-space: nowrap;   /* cegah wrap antar kolom */
  max-width: 100%;
}

.message table,
.message th,
.message td {
  border: 1px solid var(--border);
  padding: 8px 10px;
}

.message th {
  font-weight: 600;
  background: rgba(127,127,127,.1);
}

/* Input bar */
.input-container {
  width: 100%;
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  gap: 8px;
}

.input-container input {
  flex: 1;
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  background: var(--bg);
  color: var(--text);
  outline: none;
}

.input-container button {
  border: none;
  border-radius: 10px;
  padding: 10px 14px;
  background: var(--primary);
  color: white;
  cursor: pointer;
}

@media (max-width: 600px) {
  .message { max-width: 92%; font-size: 0.95rem; }
  header h1 { font-size: 1.25rem; }
  header p { font-size: 0.85rem; }
}