/* Hội thoại khách hàng LAMINA — một hệ màu, sáng/tối theo máy hoặc chọn tay. Ưu tiên điện thoại. */
:root{
  color-scheme:light;
  --plane:#f6f6f3; --surface-1:#fdfdfc; --surface-2:#efeee9; --surface-3:#e6e4dd;
  --text:#121212; --text-2:#4e4d49; --muted:#86847d; --border:rgba(15,15,15,.11); --wash:rgba(15,15,15,.045);
  --accent:#0f4c5c; --accent-ink:#fff; --accent-soft:#dcecef;
  --ai:#2a5bd6; --ai-soft:#e3ebfc; --ai-ink:#16357f;
  --nv:#0f4c5c; --nv-soft:#d9ecea; --nv-ink:#0b3a44;
  --khach-soft:#ffffff;
  --good:#0a7a3b; --good-soft:#dff3e6; --warn:#9a5b00; --warn-soft:#fdf0d5; --bad:#b3261e; --bad-soft:#fbe3e1;
  --shadow:0 1px 2px rgba(0,0,0,.05),0 4px 16px rgba(0,0,0,.06);
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --plane:#0e0f10; --surface-1:#17181a; --surface-2:#202124; --surface-3:#2a2b2f;
    --text:#f2f2f0; --text-2:#c4c2bb; --muted:#8c8a84; --border:rgba(255,255,255,.10); --wash:rgba(255,255,255,.05);
    --accent:#4fb3c7; --accent-ink:#04191e; --accent-soft:#16343b;
    --ai:#7aa2ff; --ai-soft:#1b2745; --ai-ink:#c9d8ff;
    --nv:#4fb3c7; --nv-soft:#143238; --nv-ink:#c6eef5;
    --khach-soft:#222326;
    --good:#4cc47f; --good-soft:#15301f; --warn:#f0b24a; --warn-soft:#352a14; --bad:#ff7b72; --bad-soft:#3a1916;
    --shadow:0 1px 2px rgba(0,0,0,.4);
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --plane:#0e0f10; --surface-1:#17181a; --surface-2:#202124; --surface-3:#2a2b2f;
  --text:#f2f2f0; --text-2:#c4c2bb; --muted:#8c8a84; --border:rgba(255,255,255,.10); --wash:rgba(255,255,255,.05);
  --accent:#4fb3c7; --accent-ink:#04191e; --accent-soft:#16343b;
  --ai:#7aa2ff; --ai-soft:#1b2745; --ai-ink:#c9d8ff;
  --nv:#4fb3c7; --nv-soft:#143238; --nv-ink:#c6eef5;
  --khach-soft:#222326;
  --good:#4cc47f; --good-soft:#15301f; --warn:#f0b24a; --warn-soft:#352a14; --bad:#ff7b72; --bad-soft:#3a1916;
  --shadow:0 1px 2px rgba(0,0,0,.4);
}
*{box-sizing:border-box}
html,body{height:100%}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--plane);color:var(--text);font:15px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
button,input,select,textarea{font:inherit;color:inherit}
a{color:var(--accent)}
h1,h2,h3{margin:0;font-weight:650;letter-spacing:-.01em}
h2{font-size:17px} h3{font-size:14.5px}
.phu{color:var(--text-2);font-size:13px}
.mo{color:var(--muted);font-size:12px}
.so{font-variant-numeric:tabular-nums}
[hidden]{display:none!important}

/* ---------- nút & trường ---------- */
.nut{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--border);background:var(--surface-1);border-radius:9px;
  padding:7px 12px;cursor:pointer;font-size:13.5px;font-weight:550;white-space:nowrap;min-height:36px}
.nut:hover{background:var(--wash)}
.nut:focus-visible,.o-chon:focus-visible,.tab button:focus-visible,.muc-ht:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.nut.chinh{background:var(--accent);color:var(--accent-ink);border-color:transparent}
.nut.chinh:hover{filter:brightness(1.07)}
.nut.nguy{color:var(--bad);border-color:color-mix(in srgb,var(--bad) 35%,transparent)}
.nut.nho{padding:4px 9px;min-height:30px;font-size:12.5px}
.nut[disabled]{opacity:.5;cursor:default}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=search],select,textarea{
  width:100%;border:1px solid var(--border);background:var(--surface-1);border-radius:9px;padding:9px 11px;font-size:15px}
textarea{resize:vertical;line-height:1.45}
input:focus,select:focus,textarea:focus{outline:2px solid color-mix(in srgb,var(--accent) 55%,transparent);outline-offset:0;border-color:transparent}
label.truong{display:block;margin-bottom:12px}
label.truong>span{display:block;font-size:13px;font-weight:600;margin-bottom:5px;color:var(--text-2)}

/* ---------- khung chung ---------- */
.dau{position:sticky;top:0;z-index:30;background:var(--surface-1);border-bottom:1px solid var(--border);
  padding:8px max(14px,env(safe-area-inset-left)) 0}
.dau-tren{display:flex;align-items:center;gap:10px;min-height:40px}
.ten-app{font-weight:700;font-size:15.5px;display:flex;align-items:center;gap:8px}
.ten-app .logo{width:26px;height:26px;border-radius:7px;background:var(--accent);display:grid;place-items:center;color:var(--accent-ink);flex:none}
.ten-app small{font-weight:450;color:var(--muted);font-size:12px}
.phai{margin-left:auto;display:flex;align-items:center;gap:8px}
.cong-tac{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--border);border-radius:999px;padding:5px 12px 5px 8px;
  font-size:13px;font-weight:600;background:var(--surface-1);cursor:pointer;min-height:34px}
.cong-tac .den{width:10px;height:10px;border-radius:50%;background:var(--muted);box-shadow:0 0 0 3px var(--wash)}
.cong-tac.bat{color:var(--good);background:var(--good-soft);border-color:transparent}
.cong-tac.bat .den{background:var(--good);box-shadow:0 0 0 3px color-mix(in srgb,var(--good) 25%,transparent)}
.cong-tac[disabled]{cursor:default}
.menu-toi{position:relative}
.tab{display:flex;gap:2px;overflow-x:auto;scrollbar-width:none;margin-top:4px}
.tab::-webkit-scrollbar{display:none}
.tab button{border:0;background:none;padding:9px 12px;white-space:nowrap;cursor:pointer;color:var(--text-2);border-bottom:2px solid transparent;font-weight:600;font-size:14px;display:flex;gap:6px;align-items:center}
.tab button[aria-selected=true]{color:var(--text);border-bottom-color:var(--accent)}
.huy-hieu{min-width:20px;height:20px;padding:0 6px;border-radius:999px;background:var(--bad);color:#fff;font-size:11.5px;font-weight:700;display:inline-grid;place-items:center}
.huy-hieu.xam{background:var(--surface-3);color:var(--text-2)}
.than{max-width:1100px;margin:0 auto;padding:16px 16px 60px}

.bang-canh-bao{margin:0;padding:8px 16px;font-size:13.5px;display:flex;gap:8px;align-items:flex-start;border-bottom:1px solid var(--border)}
.bang-canh-bao.nguy{background:var(--bad-soft);color:var(--bad)}
.bang-canh-bao.canh-bao{background:var(--warn-soft);color:var(--warn)}
.bang-canh-bao.binh-thuong{background:var(--surface-2);color:var(--text-2)}
.bang-canh-bao a{color:inherit;font-weight:650}

.the{background:var(--surface-1);border:1px solid var(--border);border-radius:14px;padding:16px;min-width:0}
.the+.the{margin-top:12px}
.dau-the{display:flex;align-items:center;gap:10px;flex-wrap:wrap;justify-content:space-between;margin-bottom:10px}

/* ---------- HỘP THƯ: 2 cột trên máy tính, 1 cột trên điện thoại ---------- */
.hop-thu{display:grid;grid-template-columns:minmax(300px,370px) 1fr;height:calc(100dvh - var(--cao-dau,96px));min-height:420px}
.cot-ds{border-right:1px solid var(--border);display:flex;flex-direction:column;min-height:0;background:var(--surface-1)}
.cot-ht{display:flex;flex-direction:column;min-height:0;min-width:0}
@media (max-width:820px){
  .hop-thu{grid-template-columns:1fr}
  .hop-thu.dang-mo .cot-ds{display:none}
  .hop-thu:not(.dang-mo) .cot-ht{display:none}
  .cot-ds{border-right:0}
}
.ds-dau{padding:10px 12px 8px;border-bottom:1px solid var(--border);display:grid;gap:8px}
.chips{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;padding-bottom:2px}
.chips::-webkit-scrollbar{display:none}
.o-chon{border:1px solid var(--border);background:var(--surface-1);border-radius:999px;padding:5px 11px;font-size:13px;font-weight:600;cursor:pointer;white-space:nowrap;display:inline-flex;gap:6px;align-items:center;color:var(--text-2)}
.o-chon[aria-pressed=true]{background:var(--text);color:var(--plane);border-color:transparent}
.o-chon.do[aria-pressed=false] .dem{color:var(--bad)}
.o-chon .dem{font-variant-numeric:tabular-nums;font-weight:700}
.ds{overflow-y:auto;flex:1;overscroll-behavior:contain}
.muc-ht{display:grid;grid-template-columns:40px 1fr auto;gap:10px;padding:11px 12px;border-bottom:1px solid var(--border);cursor:pointer;align-items:start;background:none;border-left:3px solid transparent;width:100%;text-align:left;border-top:0;border-right:0}
.muc-ht:hover{background:var(--wash)}
.muc-ht[aria-current=true]{background:var(--accent-soft)}
.muc-ht.can-nguoi{border-left-color:var(--bad)}
.anh-dd{width:40px;height:40px;border-radius:50%;background:var(--surface-3);display:grid;place-items:center;font-weight:700;color:var(--text-2);overflow:hidden;font-size:15px}
.anh-dd img{width:100%;height:100%;object-fit:cover}
.muc-ht .ten{font-weight:650;font-size:14.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.muc-ht .tom{color:var(--text-2);font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.muc-ht .ly-do{color:var(--bad);font-size:12.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-top:1px}
.muc-ht.chua-doc .ten,.muc-ht.chua-doc .tom{color:var(--text);font-weight:700}
.muc-ht .ben{text-align:right;display:grid;gap:4px;justify-items:end}
.nhan-tt{display:inline-flex;align-items:center;gap:4px;font-size:11.5px;font-weight:700;padding:2px 7px;border-radius:6px;white-space:nowrap}
.nhan-tt.ai{background:var(--ai-soft);color:var(--ai-ink)}
.nhan-tt.can-nguoi{background:var(--bad-soft);color:var(--bad)}
.nhan-tt.nguoi{background:var(--nv-soft);color:var(--nv-ink)}
.rong{padding:40px 20px;text-align:center;color:var(--muted)}

.ht-dau{display:flex;align-items:center;gap:10px;padding:10px 14px;border-bottom:1px solid var(--border);background:var(--surface-1);flex-wrap:wrap}
.ht-dau .nut-lui{display:none}
@media (max-width:820px){.ht-dau .nut-lui{display:inline-flex}}
.ht-dau .ten{font-weight:700;font-size:15.5px}
.ht-dau .nut-nhom{margin-left:auto;display:flex;gap:6px;flex-wrap:wrap}
.bang-tt{padding:8px 14px;font-size:13px;border-bottom:1px solid var(--border);display:flex;gap:8px;align-items:flex-start}
.bang-tt.ai{background:var(--ai-soft);color:var(--ai-ink)}
.bang-tt.can-nguoi{background:var(--bad-soft);color:var(--bad)}
.bang-tt.nguoi{background:var(--nv-soft);color:var(--nv-ink)}
.bang-tt b{font-weight:700}

.dong-tin{flex:1;overflow-y:auto;padding:14px 14px 8px;display:flex;flex-direction:column;gap:6px;overscroll-behavior:contain;background:var(--plane)}
.tin{max-width:min(78%,560px);display:flex;flex-direction:column;gap:3px}
.tin.vao{align-self:flex-start}
.tin.ra{align-self:flex-end;align-items:flex-end}
.bong{padding:8px 12px;border-radius:16px;white-space:pre-wrap;word-wrap:break-word;overflow-wrap:anywhere;font-size:14.5px;line-height:1.45;border:1px solid var(--border)}
.tin.vao .bong{background:var(--khach-soft);border-bottom-left-radius:5px}
.tin.ra.ai .bong{background:var(--ai-soft);color:var(--ai-ink);border-color:transparent;border-bottom-right-radius:5px}
.tin.ra.nv .bong{background:var(--nv);color:#fff;border-color:transparent;border-bottom-right-radius:5px}
:root[data-theme="dark"] .tin.ra.nv .bong{color:var(--accent-ink)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]) .tin.ra.nv .bong{color:var(--accent-ink)}}
.tin.ra.oa .bong{background:var(--surface-3);border-bottom-right-radius:5px}
.tin .meta{font-size:11.5px;color:var(--muted);display:flex;gap:6px;align-items:center;flex-wrap:wrap;padding:0 4px}
.tin .meta .nguon{font-weight:700}
.tin .meta.loi{color:var(--bad)}
.tin img.anh{max-width:220px;max-height:260px;border-radius:12px;display:block;border:1px solid var(--border)}
.ghi-chu{align-self:center;max-width:92%;text-align:center;font-size:12.5px;color:var(--text-2);background:var(--surface-2);padding:5px 10px;border-radius:8px}
.ghi-chu.nv{background:var(--warn-soft);color:var(--warn);text-align:left}
.bi-chan{align-self:flex-end;max-width:min(86%,580px);border:1.5px dashed color-mix(in srgb,var(--bad) 55%,transparent);border-radius:12px;padding:8px 12px;background:var(--surface-1)}
.bi-chan .tieu{font-size:12px;font-weight:700;color:var(--bad);margin-bottom:3px}
.bi-chan .nd{white-space:pre-wrap;font-size:14px;color:var(--text-2)}
.chi-tiet-ai{font-size:12px;color:var(--text-2);background:var(--surface-2);border-radius:8px;padding:6px 9px;max-width:100%}
.ngay-chia{align-self:center;font-size:11.5px;color:var(--muted);margin:8px 0 6px;font-weight:600;background:var(--surface-2);padding:2px 10px;border-radius:999px}

.soan{border-top:1px solid var(--border);background:var(--surface-1);padding:8px 10px calc(8px + env(safe-area-inset-bottom))}
.soan .hang{display:flex;gap:8px;align-items:flex-end}
.soan textarea{min-height:44px;max-height:180px;resize:none;border-radius:12px}
.soan .cong-cu{display:flex;gap:6px;align-items:center;margin-bottom:6px;flex-wrap:wrap}
.soan.ghi-chu-mode textarea{background:var(--warn-soft)}
.dem-ky-tu{font-size:11.5px;color:var(--muted);margin-left:auto}
.goi-y-hop{margin-bottom:6px;border:1px solid var(--border);border-radius:10px;padding:8px 10px;background:var(--ai-soft);color:var(--ai-ink);font-size:13px}

/* ---------- lưới & bảng ---------- */
.luoi{display:grid;gap:12px}
.luoi.c4{grid-template-columns:repeat(auto-fit,minmax(170px,1fr))}
.o-so .nhan{font-size:13px;color:var(--text-2)}
.o-so .gia-tri{font-size:26px;font-weight:700;line-height:1.2;margin-top:2px;font-variant-numeric:tabular-nums}
.o-so .chu-thich{font-size:12px;color:var(--muted);margin-top:2px}
.bang-cuon{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-size:13.5px}
th,td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border);vertical-align:top}
th{font-size:12px;color:var(--text-2);font-weight:650;white-space:nowrap}
td.so,th.so{text-align:right}

/* ---------- kho tri thức ---------- */
.kt-nhom{margin-top:18px}
.kt-nhom>h3{margin-bottom:8px;color:var(--text-2)}
.kt-muc{display:grid;grid-template-columns:1fr auto;gap:8px 12px;padding:12px 14px;border:1px solid var(--border);border-radius:12px;background:var(--surface-1);margin-bottom:8px}
.kt-muc.tat{opacity:.72;background:var(--surface-2)}
.kt-muc .nd{white-space:pre-wrap;font-size:13.5px;color:var(--text-2);grid-column:1/-1;max-height:9em;overflow:hidden;position:relative}
.kt-muc .can-dien{color:var(--warn);font-weight:700}
.thuoc{height:8px;background:var(--surface-3);border-radius:999px;overflow:hidden}
.thuoc>i{display:block;height:100%;background:var(--accent);border-radius:999px}

/* ---------- hộp thoại ---------- */
dialog{border:0;border-radius:16px;padding:0;max-width:min(640px,calc(100vw - 24px));width:100%;background:var(--surface-1);color:var(--text);box-shadow:0 20px 60px rgba(0,0,0,.3)}
dialog::backdrop{background:rgba(0,0,0,.45)}
dialog form{padding:18px}
dialog .chan{display:flex;gap:8px;justify-content:flex-end;margin-top:6px;flex-wrap:wrap}

#thong-bao{position:fixed;left:50%;bottom:calc(18px + env(safe-area-inset-bottom));transform:translateX(-50%);z-index:100;display:grid;gap:8px;width:min(520px,calc(100vw - 24px))}
.tb{background:var(--text);color:var(--plane);padding:10px 14px;border-radius:10px;font-size:14px;box-shadow:var(--shadow)}
.tb.loi{background:var(--bad);color:#fff}

/* ---------- đăng nhập ---------- */
.dang-nhap{max-width:380px;margin:12vh auto;padding:0 16px}
.dang-nhap .the{padding:22px}

/* ---------- thử AI ---------- */
.thu-luoi{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:820px){.thu-luoi{grid-template-columns:1fr}}
.kq-thu .dong{display:flex;gap:8px;margin-bottom:6px;font-size:13.5px}
.nut.gon{white-space:normal;text-align:left}
.kq-thu .dong b{min-width:92px;color:var(--text-2);font-weight:600}
.ok-chu{color:var(--good);font-weight:700}.loi-chu{color:var(--bad);font-weight:700}

/* ---------- biểu đồ cột ---------- */
.bieu-do{width:100%;height:auto;display:block}
.bieu-do text{fill:var(--muted);font-size:11px}
.chu-giai{display:flex;gap:14px;flex-wrap:wrap;font-size:12.5px;color:var(--text-2);margin-top:6px}
.chu-giai i{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:5px;vertical-align:-1px}
.sk-dong{padding:10px 0;border-bottom:1px solid var(--border)}
.sk-dong:last-child{border-bottom:0}
.sk-dau{display:flex;justify-content:space-between;gap:10px;margin-bottom:2px}
.sk-dong .phu{overflow-wrap:anywhere}
.luoi>.the+.the{margin-top:0}