/* Trợ lý DataStat (www/ds-ai.js): nút nổi góc phải + khung chat.
   Phong cách: nền kính mờ, bóng nhiều lớp, bong bóng kiểu iMessage, nút dạng viên, chuyển động mượt.
   Màu nhấn theo DataStat (#894242, #e67e58); màu chữ, đường kẻ theo bảng màu hệ thống của Apple. */
.ds-ai-fab, .ds-ai-panel {
  --ai-font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", "Segoe UI", Roboto, sans-serif;
  --ai-glass: rgba(255, 255, 255, .80);
  --ai-solid: #fff;
  --ai-line: rgba(60, 60, 67, .13);
  --ai-text: #1d1d1f;
  --ai-text2: #6e6e73;
  --ai-text3: #8e8e93;
  --ai-fill: rgba(120, 120, 128, .14);
  --ai-fill2: rgba(120, 120, 128, .08);
  --ai-bot: #f2f2f7;
  --ai-accent: #894242;
  --ai-accent-hi: #a1504a;
  --ai-accent-text: #8a3f3b;
  --ai-accent-soft: rgba(137, 66, 66, .09);
  --ai-accent-soft2: rgba(137, 66, 66, .16);
  --ai-shadow: 0 0 0 .5px rgba(0, 0, 0, .10), 0 2px 6px rgba(0, 0, 0, .05), 0 22px 56px -12px rgba(0, 0, 0, .28);
  --ai-ease: cubic-bezier(.2, .9, .3, 1);
}
body.dark-mode .ds-ai-fab, body.dark-mode .ds-ai-panel {
  --ai-glass: rgba(30, 30, 32, .80);
  --ai-solid: #2c2c2e;
  --ai-line: rgba(84, 84, 88, .55);
  --ai-text: #f5f5f7;
  --ai-text2: #a1a1a6;
  --ai-text3: #8e8e93;
  --ai-fill: rgba(120, 120, 128, .30);
  --ai-fill2: rgba(120, 120, 128, .20);
  --ai-bot: #2c2c2e;
  --ai-accent: #9a4a44;
  --ai-accent-hi: #b0574f;
  --ai-accent-text: #f4a98a;
  --ai-accent-soft: rgba(244, 169, 138, .13);
  --ai-accent-soft2: rgba(244, 169, 138, .22);
  --ai-shadow: 0 0 0 .5px rgba(255, 255, 255, .10), 0 2px 6px rgba(0, 0, 0, .3), 0 24px 60px -10px rgba(0, 0, 0, .6);
}

/* ---- Nút nổi ---- */
.ds-ai-fab {
  position: fixed; right: 24px; bottom: 24px; z-index: 1045;
  display: inline-flex; align-items: center; gap: 9px; height: 48px; padding: 0 18px 0 7px;
  border: 0; border-radius: 999px; cursor: pointer;
  background: var(--ai-glass); color: var(--ai-text);
  -webkit-backdrop-filter: saturate(180%) blur(20px); backdrop-filter: saturate(180%) blur(20px);
  box-shadow: var(--ai-shadow);
  font: 600 14px/1 var(--ai-font); letter-spacing: -.01em;
  transition: transform .25s var(--ai-ease), box-shadow .25s var(--ai-ease);
}
.ds-ai-fab:hover { transform: translateY(-2px); }
.ds-ai-fab:active { transform: scale(.97); }
.ds-ai-fab:focus-visible { outline: none; box-shadow: var(--ai-shadow), 0 0 0 4px rgba(230, 126, 88, .45); }
.ds-ai-fab-ico, .ds-ai-avatar {
  display: inline-flex; align-items: center; justify-content: center; flex: 0 0 auto; border-radius: 50%; color: #fff;
  background: linear-gradient(140deg, #f6b496 0%, #e67e58 42%, #894242 100%);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .35), 0 2px 8px rgba(137, 66, 66, .30);
}
.ds-ai-fab-ico { width: 34px; height: 34px; }
.ds-ai-fab-ico svg { width: 18px; height: 18px; transition: transform .5s var(--ai-ease); }
.ds-ai-fab:hover .ds-ai-fab-ico svg { transform: rotate(20deg) scale(1.1); }
.ds-ai-fab.ds-ai-on .ds-ai-fab-ico svg { transform: rotate(45deg); }

/* ---- Khung chat ---- */
.ds-ai-panel {
  position: fixed; right: 24px; bottom: 84px; z-index: 1045;
  width: 392px; height: min(620px, calc(100vh - 116px));
  display: flex; flex-direction: column; overflow: hidden; isolation: isolate;
  background: var(--ai-glass); color: var(--ai-text);
  -webkit-backdrop-filter: saturate(180%) blur(28px); backdrop-filter: saturate(180%) blur(28px);
  border-radius: 22px; box-shadow: var(--ai-shadow);
  font: 14.5px/1.5 var(--ai-font); letter-spacing: -.005em;
  -webkit-font-smoothing: antialiased;
  transform-origin: bottom right;
  transition: opacity .2s ease, transform .34s var(--ai-ease);
}
.ds-ai-panel[hidden] { display: none; }
.ds-ai-panel.ds-ai-closed { opacity: 0; transform: translateY(10px) scale(.95); pointer-events: none; }
.ds-ai-panel.ds-ai-big { width: min(780px, calc(100vw - 48px)); height: calc(100vh - 116px); }
.ds-ai-panel.ds-ai-moving { transition: none; user-select: none; }
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .ds-ai-fab, .ds-ai-panel { background: var(--ai-solid); }
}

.ds-ai-head {
  display: flex; align-items: center; gap: 11px; padding: 14px 12px 12px 16px;
  border-bottom: .5px solid var(--ai-line); cursor: grab; user-select: none; touch-action: none;
}
.ds-ai-moving .ds-ai-head { cursor: grabbing; }
.ds-ai-avatar { position: relative; width: 36px; height: 36px; }
.ds-ai-avatar svg { width: 20px; height: 20px; }
.ds-ai-avatar::after { content: ""; position: absolute; right: -1px; bottom: -1px; width: 10px; height: 10px; border-radius: 50%; background: #34c759; box-shadow: 0 0 0 2px var(--ai-solid); }
.ds-ai-hgroup { flex: 1; min-width: 0; }
.ds-ai-title { font-size: 15.5px; font-weight: 600; letter-spacing: -.02em; line-height: 1.25; color: var(--ai-text); }
.ds-ai-title span { background: linear-gradient(90deg, #e67e58, #894242); -webkit-background-clip: text; background-clip: text; color: transparent; -webkit-text-fill-color: transparent; }
body.dark-mode .ds-ai-title span { background: linear-gradient(90deg, #f6b496, #f2a07f); -webkit-background-clip: text; background-clip: text; }
.ds-ai-page { font-size: 12px; color: var(--ai-text2); margin-top: 1px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ds-ai-hbtn {
  display: inline-flex; align-items: center; justify-content: center; flex: 0 0 auto;
  width: 30px; height: 30px; border: 0; border-radius: 50%; background: transparent; color: var(--ai-text2); cursor: pointer;
  transition: background .15s, color .15s, transform .15s;
}
.ds-ai-hbtn svg { width: 15px; height: 15px; }
.ds-ai-hbtn:hover { background: var(--ai-fill); color: var(--ai-text); }
.ds-ai-hbtn:active { transform: scale(.92); }
.ds-ai-grip { position: absolute; top: 0; left: 0; width: 20px; height: 20px; cursor: nwse-resize; z-index: 2; touch-action: none; }
.ds-ai-grip::before { content: ""; position: absolute; top: 7px; left: 7px; width: 9px; height: 9px; border-top: 2px solid var(--ai-text3); border-left: 2px solid var(--ai-text3); border-top-left-radius: 5px; opacity: 0; transition: opacity .2s; }
.ds-ai-panel:hover .ds-ai-grip::before { opacity: .55; }

/* ---- Hội thoại ---- */
.ds-ai-log { flex: 1; overflow-y: auto; padding: 16px 14px 10px; display: flex; flex-direction: column; gap: 8px; scroll-behavior: smooth; }
.ds-ai-log::-webkit-scrollbar, .ds-ai-chips::-webkit-scrollbar { width: 6px; }
.ds-ai-log::-webkit-scrollbar-thumb, .ds-ai-chips::-webkit-scrollbar-thumb { background: var(--ai-fill); border-radius: 3px; }
.ds-ai-msg { max-width: 88%; padding: 9px 13px; border-radius: 19px; overflow-wrap: anywhere; animation: ds-ai-in .32s var(--ai-ease) both; }
@keyframes ds-ai-in { from { opacity: 0; transform: translateY(8px) scale(.98); } }
.ds-ai-msg p { margin: 0 0 6px; } .ds-ai-msg p:last-of-type { margin-bottom: 0; }
.ds-ai-msg ul, .ds-ai-msg ol { margin: 4px 0 6px; padding-left: 18px; }
.ds-ai-msg li { margin: 2px 0; }
.ds-ai-msg b, .ds-ai-msg strong { font-weight: 600; }
.ds-ai-msg table { border-collapse: collapse; margin: 6px 0; font-size: 13px; }
.ds-ai-msg th, .ds-ai-msg td { padding: 4px 7px; border-bottom: .5px solid var(--ai-line); text-align: left; }
.ds-ai-bot { align-self: flex-start; background: var(--ai-bot); border-bottom-left-radius: 6px; color: var(--ai-text); }
.ds-ai-user { align-self: flex-end; color: #fff; border-bottom-right-radius: 6px;
  background: linear-gradient(180deg, var(--ai-accent-hi), var(--ai-accent)); box-shadow: 0 1px 2px rgba(137, 66, 66, .25); }
.ds-ai-sep { align-self: center; margin: 4px 0; padding: 3px 11px; border-radius: 999px; background: var(--ai-fill2); color: var(--ai-text2); font-size: 11.5px; font-weight: 500; }
.ds-ai-src { margin-top: 7px; font-size: 11px; color: var(--ai-text3); }
.ds-ai-qhead { font-weight: 600; color: var(--ai-accent-text); letter-spacing: -.01em; }
.ds-ai-related { background: transparent; padding: 0 2px; }
.ds-ai-related p { font-size: 12px; color: var(--ai-text2); margin-bottom: 2px; }

.ds-ai-act {
  display: inline-flex; align-items: center; gap: 6px; margin: 7px 6px 0 0; padding: 6px 13px;
  border: 0; border-radius: 999px; background: var(--ai-accent-soft); color: var(--ai-accent-text);
  font: 600 13px/1.3 var(--ai-font); cursor: pointer; text-align: left;
  transition: background .15s, color .15s, transform .15s;
}
.ds-ai-act:hover { background: var(--ai-accent); color: #fff; }
.ds-ai-act:active { transform: scale(.96); }
.ds-ai-act-ghost { background: var(--ai-fill2); color: var(--ai-text2); }
.ds-ai-act-ghost:hover { background: var(--ai-fill); color: var(--ai-text); }

.ds-ai-opt {
  display: block; width: 100%; margin-top: 6px; padding: 9px 13px; border: 0; border-radius: 12px;
  background: var(--ai-solid); color: var(--ai-text); font: 500 13.5px/1.4 var(--ai-font); text-align: left; cursor: pointer;
  box-shadow: 0 0 0 .5px var(--ai-line); transition: background .15s, color .15s, transform .15s, opacity .2s;
}
.ds-ai-opt:hover:not(:disabled) { background: var(--ai-accent-soft); color: var(--ai-accent-text); }
.ds-ai-opt:active:not(:disabled) { transform: scale(.98); }
.ds-ai-opt:disabled { cursor: default; opacity: .4; }
.ds-ai-opt.ds-ai-picked { opacity: 1; background: var(--ai-accent-soft2); color: var(--ai-accent-text); font-weight: 600; }

.ds-ai-steps { list-style: none; counter-reset: st; margin: 8px 0 4px; padding: 0; }
.ds-ai-steps li { position: relative; padding-left: 30px; margin: 0 0 12px; }
.ds-ai-steps li::before {
  counter-increment: st; content: counter(st); position: absolute; left: 0; top: 1px;
  width: 21px; height: 21px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  background: var(--ai-accent-soft2); color: var(--ai-accent-text); font-size: 12px; font-weight: 700;
}

.ds-ai-typing { display: inline-flex; gap: 5px; padding: 13px 15px; }
.ds-ai-typing span { width: 7px; height: 7px; border-radius: 50%; background: var(--ai-text3); animation: ds-ai-dot 1.1s infinite ease-in-out; }
.ds-ai-typing span:nth-child(2) { animation-delay: .15s; } .ds-ai-typing span:nth-child(3) { animation-delay: .3s; }
@keyframes ds-ai-dot { 0%, 80%, 100% { opacity: .35; transform: translateY(0); } 40% { opacity: 1; transform: translateY(-3px); } }

/* ---- Câu hỏi gợi ý ---- */
.ds-ai-chips { display: flex; flex-wrap: wrap; gap: 6px; padding: 2px 14px 10px; max-height: 98px; overflow-y: auto; animation: ds-ai-in .3s var(--ai-ease) both; }
.ds-ai-chips[hidden] { display: none; }
.ds-ai-chip {
  border: 0; border-radius: 999px; padding: 6px 12px; background: var(--ai-fill2); color: var(--ai-text);
  font: 500 12.5px/1.35 var(--ai-font); cursor: pointer; text-align: left; transition: background .15s, transform .15s;
}
.ds-ai-chip:hover { background: var(--ai-fill); }
.ds-ai-chip:active { transform: scale(.96); }
.ds-ai-chip-main { background: var(--ai-accent-soft); color: var(--ai-accent-text); font-weight: 600; }
.ds-ai-chip-main:hover { background: var(--ai-accent-soft2); }
.ds-ai-chip.ds-ai-more { display: none; }
.ds-ai-chips.ds-ai-open .ds-ai-more { display: inline-block; }
.ds-ai-chip-toggle { background: transparent; color: var(--ai-text2); box-shadow: inset 0 0 0 1px var(--ai-line); }

/* ---- Ô nhập ---- */
.ds-ai-form {
  display: flex; align-items: flex-end; gap: 4px; margin: 0 12px; padding: 5px;
  background: var(--ai-fill2); border-radius: 22px; box-shadow: inset 0 0 0 .5px var(--ai-line);
  transition: background .2s, box-shadow .2s;
}
.ds-ai-form:focus-within { background: var(--ai-solid); box-shadow: inset 0 0 0 1px var(--ai-accent-soft2), 0 0 0 4px var(--ai-accent-soft); }
/* đủ mạnh để thắng quy tắc chung "body.dark-mode textarea:focus" của app */
.ds-ai-panel .ds-ai-form textarea,
.ds-ai-panel .ds-ai-form textarea:focus, .ds-ai-panel .ds-ai-form textarea:hover {
  flex: 1; min-width: 0; min-height: 0; height: auto; max-height: 110px; padding: 6px 4px; margin: 0;
  border: 0 !important; outline: 0 !important; box-shadow: none !important; background: transparent !important;
  resize: none; overflow-y: hidden; color: var(--ai-text); font: 14.5px/1.45 var(--ai-font);
}
.ds-ai-form textarea::placeholder { color: var(--ai-text3); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ds-ai-sugg, .ds-ai-send {
  display: inline-flex; align-items: center; justify-content: center; flex: 0 0 32px; width: 32px; height: 32px;
  border: 0; border-radius: 50%; cursor: pointer; transition: background .15s, color .15s, transform .15s, opacity .2s;
}
.ds-ai-sugg { background: transparent; color: var(--ai-text3); }
.ds-ai-sugg svg { width: 17px; height: 17px; }
.ds-ai-sugg:hover { background: var(--ai-fill); color: var(--ai-text); }
.ds-ai-sugg.ds-ai-on { color: var(--ai-accent-text); background: var(--ai-accent-soft); }
.ds-ai-send { color: #fff; background: linear-gradient(180deg, var(--ai-accent-hi), var(--ai-accent)); opacity: .35; }
.ds-ai-send svg { width: 16px; height: 16px; }
.ds-ai-send.ds-ai-ready { opacity: 1; }
.ds-ai-send:active { transform: scale(.9); }
.ds-ai-foot { display: flex; align-items: center; justify-content: center; gap: 5px; padding: 8px 16px 12px; font-size: 11px; color: var(--ai-text3); }
.ds-ai-foot svg { width: 11px; height: 11px; flex: 0 0 auto; }

/* ---- "Chỉ cho tôi": lớp đèn chiếu nổi phía trên nội dung (www/ds-ai.js spotlight) ---- */
.ds-ai-spot {
  position: fixed; z-index: 1044; pointer-events: none; border-radius: 12px;
  background: rgba(230, 126, 88, .07);
  box-shadow: 0 0 0 2.5px rgba(230, 126, 88, .95), 0 0 0 8px rgba(230, 126, 88, .16), 0 10px 30px rgba(230, 126, 88, .22);
  animation: ds-ai-spot-in .38s cubic-bezier(.2, .9, .3, 1.2) both, ds-ai-spot-pulse 1.3s ease-in-out .45s 2;
  transition: opacity .35s ease;
}
.ds-ai-spot-out { opacity: 0; }
@keyframes ds-ai-spot-in { from { opacity: 0; transform: scale(1.12); } }
@keyframes ds-ai-spot-pulse { 50% { box-shadow: 0 0 0 2.5px rgba(230, 126, 88, .95), 0 0 0 14px rgba(230, 126, 88, .06), 0 10px 30px rgba(230, 126, 88, .22); } }

/* Thông báo của Shiny cũng ở góc phải dưới: đẩy lên trên nút trợ lý */
#shiny-notification-panel { bottom: 76px; }

@media (max-height: 640px) { .ds-ai-chips { max-height: 68px; } }
@media (max-width: 480px) {
  .ds-ai-grip, .ds-ai-bigbtn { display: none; }
  .ds-ai-head { cursor: default; }
  .ds-ai-fab { right: 16px; bottom: 16px; }
  .ds-ai-panel { right: 10px; left: 10px; width: auto; bottom: 74px; height: calc(100vh - 92px); border-radius: 20px; }
}
@media (prefers-reduced-motion: reduce) {
  .ds-ai-fab, .ds-ai-panel, .ds-ai-msg, .ds-ai-chips, .ds-ai-spot, .ds-ai-fab-ico svg { animation: none !important; transition: none !important; }
}