/* ==========================================================================
   MatrixHanzi Speaking v2 — giao diện đăng nhập / tạo tài khoản.
   Tiền tố "mha-" để không đụng CSS trang. Dùng token --st-* của studio.css,
   có giá trị dự phòng để nhúng được ở module khác.
   ========================================================================== */

.mha-root {
  --mha-paper: var(--st-paper, #fffdf9);
  --mha-bg: var(--st-bg, #f7f5ef);
  --mha-soft: var(--st-soft, #f2eee3);
  --mha-soft-2: var(--st-soft-2, #eae4d5);
  --mha-ink: var(--st-ink, #22281f);
  --mha-muted: var(--st-muted, #6d7466);
  --mha-line: var(--st-line, #e2dccd);
  --mha-green: var(--st-green, #1f5c4d);
  --mha-green-strong: var(--st-green-strong, #17483c);
  --mha-green-soft: var(--st-green-soft, #e3efe9);
  --mha-danger: var(--st-danger, #b3453a);
  --mha-good: var(--st-good, #22734f);
  --mha-amber: var(--st-amber, #b07a1e);
  /* Con dấu 矩 — cùng ngôn ngữ thị giác với trang chủ /vi/ và /en/. */
  --mha-seal-bg: #285342;
  --mha-seal-ink: #fff6df;
  --mha-han: 'Noto Serif SC', 'Songti SC', serif;
  --mha-ui: 'Plus Jakarta Sans', 'Inter', system-ui, sans-serif;

  position: fixed;
  inset: 0;
  z-index: 10000;
  display: grid;
  place-items: center;
  padding: 24px;
}

.mha-root[hidden] { display: none; }

/* Nền nút là màu xanh sáng trong dark mode, nên chữ phải tối để đủ tương phản. */
[data-theme='dark'] .mha-root { --mha-cta-ink: #0f2018; }

.mha-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(18, 27, 22, 0.56);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  opacity: 0;
  transition: opacity 0.22s ease;
}

/* Khung chia hai cột trên desktop: cột trái là thương hiệu, cột phải là form.
   overflow:hidden ở ngoài + .mha-main cuộn bên trong để không lộ thanh cuộn. */
.mha-dialog {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  width: min(100%, 438px);
  max-height: min(92dvh, 760px);
  overflow: hidden;
  padding: 0;
  border: 1px solid var(--mha-line);
  border-radius: 22px;
  background: var(--mha-paper);
  color: var(--mha-ink);
  box-shadow:
    0 32px 90px rgba(12, 22, 16, 0.32),
    0 2px 0 rgba(255, 255, 255, 0.4) inset;
  opacity: 0;
  transform: translateY(14px) scale(0.982);
  transition:
    opacity 0.22s ease,
    transform 0.26s cubic-bezier(0.2, 0.85, 0.3, 1);
}

.mha-main {
  position: relative;
  min-width: 0;
  max-height: inherit;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -ms-overflow-style: none;
  padding: 26px 30px 20px;
}

.mha-main::-webkit-scrollbar { display: none; width: 0; height: 0; }

.mha-root.is-open .mha-backdrop { opacity: 1; }
.mha-root.is-open .mha-dialog { opacity: 1; transform: none; }

.mha-dialog:focus { outline: none; }

.mha-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--mha-muted);
  cursor: pointer;
  z-index: 2;
}

.mha-close:hover {
  background: var(--mha-soft);
  color: var(--mha-ink);
}

.mha-close:focus-visible,
.mha-eye:focus-visible,
.mha-google:focus-visible,
.mha-submit:focus-visible,
.mha-link:focus-visible,
.mha-switch button:focus-visible,
.mha-back:focus-visible {
  outline: 2px solid var(--mha-green);
  outline-offset: 2px;
}

/* ------------------------- cột thương hiệu (desktop) ---------------------- */

.mha-aside { display: none; }

/* ------------------------------- thương hiệu ------------------------------ */

.mha-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 14px;
  color: var(--mha-green);
  font-family: var(--mha-ui);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.mha-brand-mark {
  width: 32px;
  height: 35px;
  display: grid;
  place-items: center;
  border-radius: 5px;
  background: var(--mha-seal-bg);
  color: var(--mha-seal-ink);
  font-family: var(--mha-han);
  font-size: 20px;
  font-weight: 600;
  line-height: 1;
}

.mha-title {
  margin: 0;
  font-family: var(--mha-ui);
  font-size: 23px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.015em;
}

.mha-sub {
  margin: 7px 0 0;
  color: var(--mha-muted);
  font-size: 13.5px;
  line-height: 1.55;
}

.mha-sub strong {
  color: var(--mha-ink);
  font-weight: 700;
  overflow-wrap: anywhere;
}

/* ---------------------------------- form ---------------------------------- */

.mha-form { margin-top: 18px; }

.mha-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 230px;
  color: var(--mha-muted);
  font-size: 13.5px;
  font-weight: 600;
}

.mha-loading .mha-spinner {
  width: 18px;
  height: 18px;
  border-width: 2.5px;
  border-color: color-mix(in srgb, currentColor 24%, transparent);
  border-top-color: currentColor;
}

/* --------------------------- tài khoản gần đây --------------------------- */
/* Bỏ khung thẻ để khối này nhẹ hơn; thông tin phụ dồn vào một dòng note. */

.mha-recents {
  margin-bottom: 14px;
}

.mha-recents-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 6px;
  color: var(--mha-muted);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.mha-recents-clear {
  padding: 1px 0;
  border: 0;
  background: transparent;
  color: var(--mha-muted);
  font: inherit;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: none;
  cursor: pointer;
}

.mha-recents-clear:hover { color: var(--mha-danger); }

.mha-recents-list {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 2px;
  scrollbar-width: none;
}

.mha-recents-list::-webkit-scrollbar { display: none; }

.mha-recents-note {
  margin: 6px 0 0;
  color: var(--mha-muted);
  font-size: 10.5px;
  line-height: 1.4;
}

.mha-recent {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  flex: none;
  padding: 4px 10px 4px 4px;
  border: 1px solid var(--mha-line);
  border-radius: 999px;
  background: var(--mha-paper);
  color: var(--mha-ink);
  font: inherit;
  font-size: 12.5px;
  font-weight: 650;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.mha-recent:hover { border-color: color-mix(in srgb, var(--mha-green) 40%, var(--mha-line)); }

.mha-recent.is-active {
  border-color: var(--mha-green);
  background: var(--mha-green-soft);
  color: var(--mha-green);
}

.mha-recent-avatar {
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  flex: none;
  border-radius: 50%;
  background: var(--mha-green);
  color: var(--mha-cta-ink, #fdfbf6);
  font-family: 'Plus Jakarta Sans', 'Inter', system-ui, sans-serif;
  font-size: 10.5px;
  font-weight: 800;
}

.mha-recent.is-google .mha-recent-avatar {
  background: var(--mha-paper);
  color: #4285f4;
  border: 1px solid var(--mha-line);
  font-size: 12px;
}

.mha-recent-name {
  max-width: 150px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mha-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  min-height: 46px;
  padding: 10px 16px;
  border: 1px solid var(--mha-line);
  border-radius: 12px;
  background: var(--mha-paper);
  color: var(--mha-ink);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.16s ease, border-color 0.16s ease, transform 0.12s ease;
}

.mha-google:hover:not(:disabled) {
  background: var(--mha-soft);
  border-color: color-mix(in srgb, var(--mha-green) 35%, var(--mha-line));
}

.mha-google:active:not(:disabled) { transform: translateY(1px); }
.mha-google:disabled { opacity: 0.55; cursor: not-allowed; }
.mha-google svg { flex: none; }

.mha-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 12px 0;
  color: var(--mha-muted);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.mha-divider::before,
.mha-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--mha-line);
}

.mha-field { margin-bottom: 11px; }

.mha-label-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 7px;
}

.mha-label {
  display: block;
  margin-bottom: 7px;
  color: var(--mha-ink);
  font-size: 13px;
  font-weight: 650;
}

.mha-label-row .mha-label { margin-bottom: 0; }

.mha-input-wrap { position: relative; }

.mha-input {
  width: 100%;
  min-height: 46px;
  padding: 11px 13px;
  border: 1px solid var(--mha-line);
  border-radius: 12px;
  background: var(--mha-bg);
  color: var(--mha-ink);
  font: inherit;
  font-size: 15px;
  line-height: 1.4;
  transition: border-color 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.mha-input::placeholder { color: color-mix(in srgb, var(--mha-muted) 78%, transparent); }

.mha-input:hover:not(:disabled) { border-color: color-mix(in srgb, var(--mha-green) 28%, var(--mha-line)); }

.mha-input:focus {
  outline: none;
  border-color: var(--mha-green);
  background: var(--mha-paper);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--mha-green) 16%, transparent);
}

.mha-input.is-invalid {
  border-color: var(--mha-danger);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--mha-danger) 12%, transparent);
}

.mha-input:disabled { opacity: 0.7; cursor: not-allowed; }

.mha-input:-webkit-autofill,
.mha-input:-webkit-autofill:hover,
.mha-input:-webkit-autofill:focus {
  -webkit-text-fill-color: var(--mha-ink);
  -webkit-box-shadow: 0 0 0 1000px var(--mha-paper) inset;
  transition: background-color 9999s ease-in-out 0s;
}

.mha-input-wrap .mha-input { padding-right: 46px; }

.mha-eye {
  position: absolute;
  top: 50%;
  right: 6px;
  width: 34px;
  height: 34px;
  transform: translateY(-50%);
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--mha-muted);
  cursor: pointer;
}

.mha-eye:hover { color: var(--mha-ink); background: var(--mha-soft); }

.mha-field-error {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  margin: 6px 2px 0;
  color: var(--mha-danger);
  font-size: 12.5px;
  font-weight: 550;
  line-height: 1.45;
}

.mha-field-error[hidden] { display: none; }
.mha-field-error svg { flex: none; margin-top: 1px; }

.mha-hint {
  margin: 6px 2px 0;
  color: var(--mha-muted);
  font-size: 12px;
  line-height: 1.5;
}

/* ------------------------------ độ mạnh mật khẩu --------------------------- */

.mha-strength { margin: 7px 2px 0; }

.mha-strength[hidden] { display: none; }

.mha-strength-bars {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
}

.mha-strength-bars i {
  height: 4px;
  border-radius: 999px;
  background: var(--mha-soft-2);
  transition: background 0.2s ease;
}

.mha-strength-label {
  display: block;
  margin-top: 4px;
  color: var(--mha-muted);
  font-size: 11.5px;
  line-height: 1.4;
}

.mha-strength[data-score='1'] .mha-strength-bars i:nth-child(-n + 1) { background: var(--mha-danger); }
.mha-strength[data-score='2'] .mha-strength-bars i:nth-child(-n + 2) { background: var(--mha-amber); }
.mha-strength[data-score='3'] .mha-strength-bars i:nth-child(-n + 3) { background: color-mix(in srgb, var(--mha-good) 72%, var(--mha-amber)); }
.mha-strength[data-score='4'] .mha-strength-bars i { background: var(--mha-good); }

.mha-strength[data-score='1'] .mha-strength-label,
.mha-strength[data-score='2'] .mha-strength-label { color: var(--mha-amber); }
.mha-strength[data-score='3'] .mha-strength-label,
.mha-strength[data-score='4'] .mha-strength-label { color: var(--mha-good); }

/* ---------------------------------- nút ---------------------------------- */

.mha-submit {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  width: 100%;
  min-height: 47px;
  margin-top: 4px;
  padding: 11px 18px;
  border: 0;
  border-radius: 12px;
  background: var(--mha-green);
  color: var(--mha-cta-ink, #fdfbf6);
  font: inherit;
  font-size: 14.5px;
  font-weight: 750;
  letter-spacing: 0.01em;
  cursor: pointer;
  box-shadow: 0 10px 24px color-mix(in srgb, var(--mha-green) 24%, transparent);
  transition: background 0.18s ease, transform 0.12s ease, box-shadow 0.18s ease;
}

.mha-submit:hover:not(:disabled) {
  background: var(--mha-green-strong);
  transform: translateY(-1px);
  box-shadow: 0 12px 28px color-mix(in srgb, var(--mha-green) 30%, transparent);
}

.mha-submit:active:not(:disabled) { transform: translateY(0); }
.mha-submit:disabled { opacity: 0.62; cursor: not-allowed; box-shadow: none; }

.mha-spinner {
  width: 15px;
  height: 15px;
  flex: none;
  border: 2px solid color-mix(in srgb, currentColor 30%, transparent);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: mha-spin 0.7s linear infinite;
}

@keyframes mha-spin { to { transform: rotate(360deg); } }

/* -------------------------------- liên kết ------------------------------- */

.mha-link {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--mha-green);
  font: inherit;
  font-size: 12.5px;
  font-weight: 650;
  cursor: pointer;
}

.mha-link:hover { text-decoration: underline; }

.mha-switch {
  margin: 12px 0 0;
  padding-top: 10px;
  border-top: 1px solid var(--mha-line);
  color: var(--mha-muted);
  font-size: 13px;
  text-align: center;
}

.mha-switch button {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--mha-green);
  font: inherit;
  font-size: 13px;
  font-weight: 750;
  cursor: pointer;
}

.mha-switch button:hover { text-decoration: underline; }

.mha-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 14px auto 0;
  padding: 4px;
  border: 0;
  background: transparent;
  color: var(--mha-muted);
  font: inherit;
  font-size: 12.5px;
  font-weight: 600;
  cursor: pointer;
}

.mha-back:hover { color: var(--mha-ink); }

.mha-legal {
  margin: 8px 0 0;
  color: var(--mha-muted);
  font-size: 11px;
  line-height: 1.55;
  text-align: center;
}

.mha-legal a {
  color: var(--mha-muted);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.mha-legal a:hover { color: var(--mha-green); }

.mha-secure {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  margin: 7px 0 0;
  color: var(--mha-muted);
  font-size: 11px;
}

.mha-secure svg { opacity: 0.8; }

/* --------------------------------- thông báo ------------------------------ */

.mha-alert {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin: 16px 0 0;
  padding: 11px 12px;
  border: 1px solid color-mix(in srgb, var(--mha-danger) 32%, var(--mha-line));
  border-radius: 11px;
  background: color-mix(in srgb, var(--mha-danger) 8%, var(--mha-paper));
  color: var(--mha-danger);
  font-size: 12.5px;
  font-weight: 550;
  line-height: 1.5;
}

.mha-alert[hidden] { display: none; }
.mha-alert svg { flex: none; margin-top: 1px; }

.mha-alert[data-tone='success'] {
  border-color: color-mix(in srgb, var(--mha-good) 32%, var(--mha-line));
  background: color-mix(in srgb, var(--mha-good) 8%, var(--mha-paper));
  color: var(--mha-good);
}

.mha-alert[data-tone='info'] {
  border-color: color-mix(in srgb, var(--mha-green) 28%, var(--mha-line));
  background: color-mix(in srgb, var(--mha-green) 7%, var(--mha-paper));
  color: var(--mha-green);
}

/* ------------------------------- mã xác minh ------------------------------- */

.mha-code {
  width: 100%;
  min-height: 56px;
  padding: 10px 8px 10px 18px;
  border: 1px solid var(--mha-line);
  border-radius: 12px;
  background: var(--mha-bg);
  color: var(--mha-ink);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.42em;
  text-align: center;
  font-variant-numeric: tabular-nums;
  transition: border-color 0.16s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.mha-code::placeholder { letter-spacing: 0.42em; color: color-mix(in srgb, var(--mha-muted) 55%, transparent); }

.mha-code:focus {
  outline: none;
  border-color: var(--mha-green);
  background: var(--mha-paper);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--mha-green) 16%, transparent);
}

.mha-code.is-invalid {
  border-color: var(--mha-danger);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--mha-danger) 12%, transparent);
}

.mha-resend {
  margin: 14px 0 0;
  color: var(--mha-muted);
  font-size: 12.5px;
  text-align: center;
}

.mha-resend button {
  padding: 2px 0;
  border: 0;
  background: transparent;
  color: var(--mha-green);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.mha-resend button:hover:not(:disabled) { text-decoration: underline; }
.mha-resend button:disabled { color: var(--mha-muted); cursor: default; font-weight: 600; }

/* ------------------------------- responsive ------------------------------- */

/* Desktop: hai cột ngang — thương hiệu trái, form phải. Toàn bộ form nằm gọn
   trong khung nên không phải cuộn dọc. */
@media (min-width: 780px) and (min-height: 600px) {
  .mha-dialog {
    grid-template-columns: 286px minmax(0, 1fr);
    width: min(100%, 820px);
    min-height: 546px;
    max-height: min(92dvh, 720px);
  }

  .mha-aside {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 28px;
    padding: 30px 26px;
    overflow: hidden;
    background:
      radial-gradient(120% 90% at 12% 0%, rgba(255, 255, 255, 0.09), transparent 58%),
      linear-gradient(168deg, #24634f 0%, #17483c 62%, #123a30 100%);
    color: #f2ecdd;
  }

  .mha-aside-head {
    display: flex;
    align-items: center;
    gap: 11px;
    position: relative;
    z-index: 1;
  }

  .mha-seal {
    width: 38px;
    height: 42px;
    display: grid;
    place-items: center;
    flex: none;
    border-radius: 5px;
    background: rgba(247, 241, 225, 0.94);
    color: #17483c;
    font-family: var(--mha-han);
    font-size: 23px;
    font-weight: 600;
    line-height: 1;
  }

  .mha-aside-word {
    display: grid;
    gap: 3px;
    font-family: var(--mha-ui);
    font-size: 15.5px;
    font-weight: 800;
    letter-spacing: -0.01em;
  }

  .mha-aside-word small {
    color: rgba(242, 236, 221, 0.66);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.09em;
  }

  .mha-aside-quote {
    position: relative;
    z-index: 1;
    margin: 0;
    display: grid;
    gap: 9px;
  }

  .mha-aside-zh {
    font-family: var(--mha-han);
    font-size: 25px;
    font-weight: 600;
    line-height: 1.45;
    letter-spacing: 0.06em;
    color: #f7f1e1;
  }

  .mha-aside-quote small {
    max-width: 21ch;
    color: rgba(242, 236, 221, 0.62);
    font-size: 11.5px;
    line-height: 1.6;
  }

  .mha-aside-watermark {
    position: absolute;
    right: -34px;
    bottom: -76px;
    font-family: var(--mha-han);
    font-size: 200px;
    font-weight: 600;
    line-height: 1;
    color: rgba(255, 255, 255, 0.038);
    pointer-events: none;
    user-select: none;
  }

  .mha-main {
    padding: 34px 38px 26px;
  }

  /* Cột trái đã mang thương hiệu nên không lặp lại lockup trong form. */
  .mha-brand { display: none; }
  .mha-title { font-size: 25px; }
  .mha-close { top: 18px; right: 18px; }
}

/* Cửa sổ thấp (laptop 13", review pane): thu gọn để toàn bộ form nằm trong khung. */
@media (max-height: 760px) {
  .mha-main { padding-top: 22px; padding-bottom: 14px; }
  .mha-brand { margin-bottom: 10px; }
  .mha-form { margin-top: 14px; }
  .mha-divider { margin: 11px 0; }
  .mha-field { margin-bottom: 10px; }
  .mha-label-row { margin-bottom: 5px; }
  .mha-label { margin-bottom: 5px; }
  .mha-input { min-height: 44px; }
  .mha-submit { min-height: 45px; }
  .mha-switch { margin-top: 10px; padding-top: 10px; }
  .mha-legal { margin-top: 8px; }
  .mha-secure { margin-top: 7px; }
}

@media (max-width: 560px) {
  .mha-root {
    padding: 0;
    align-items: end;
  }

  .mha-dialog {
    width: 100%;
    max-height: 94dvh;
    border-bottom: 0;
    border-radius: 22px 22px 0 0;
    transform: translateY(28px);
  }

  .mha-main {
    padding: 26px 18px calc(18px + env(safe-area-inset-bottom));
  }

  .mha-dialog::before {
    content: '';
    position: absolute;
    top: 9px;
    left: 50%;
    width: 36px;
    height: 4px;
    transform: translateX(-50%);
    border-radius: 999px;
    background: var(--mha-soft-2);
    z-index: 3;
  }

  .mha-brand { margin-top: 6px; }
  .mha-title { font-size: 22px; }
  .mha-close { top: 10px; right: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  .mha-backdrop,
  .mha-dialog,
  .mha-spinner { transition: none; animation: none; }
}

html.mha-open,
html.mha-open body { overflow: hidden; }

/* ==========================================================================
   Widget tài khoản trên thanh điều hướng (Gate + trang chủ VI/EN).
   Chỉ dùng tiền tố "mh-auth-*"; menu dùng specificity cao hơn .top-nav a
   để không bị luật link của trang chủ đè kiểu.
   ========================================================================== */

.mh-auth {
  --mh-auth-ink: var(--color-text, var(--text, var(--st-ink, #253c35)));
  --mh-auth-muted: var(--color-muted, var(--muted, var(--st-muted, #70776c)));
  --mh-auth-line: var(--color-line, var(--line, var(--st-line, #dfe2d8)));
  --mh-auth-card: var(--color-card, var(--surface, var(--st-paper, #fffefb)));
  --mh-auth-soft: var(--color-soft, var(--st-soft, #eeeee7));
  --mh-auth-green: var(--color-green, var(--st-green, #1f5c4d));
  --mh-auth-green-ink: var(--color-green, var(--st-green, #285c49));
  --mh-auth-gold: var(--color-gold, var(--gold, var(--st-amber, #987547)));

  position: relative;
  display: inline-flex;
  align-items: center;
  font-family: var(--font-body, var(--font-sans, 'Be Vietnam Pro', system-ui, sans-serif));
  color: var(--mh-auth-ink);
}

.mh-auth [hidden] { display: none !important; }

.mh-auth-btn,
.mh-auth-trigger {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid var(--mh-auth-line);
  border-radius: 999px;
  background: var(--mh-auth-card);
  color: var(--mh-auth-ink);
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition:
    border-color 0.16s ease,
    background 0.16s ease,
    color 0.16s ease;
}

.mh-auth-btn:hover,
.mh-auth-trigger:hover {
  border-color: var(--mh-auth-green);
  color: var(--mh-auth-green-ink);
}

.mh-auth-btn:focus-visible,
.mh-auth-trigger:focus-visible,
.mh-auth .mh-auth-item:focus-visible,
.mh-auth-signout:focus-visible {
  outline: 2px solid var(--mh-auth-gold);
  outline-offset: 2px;
}

.mh-auth-trigger { padding: 3px 10px 3px 4px; }

.mh-auth-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--mh-auth-soft);
  flex-shrink: 0;
}

.mh-auth-name {
  max-width: 128px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mh-auth-caret {
  flex-shrink: 0;
  color: var(--mh-auth-muted);
  transition: transform 0.16s ease;
}

.mh-auth.is-open .mh-auth-caret { transform: rotate(180deg); }

/* Gate: gọn hơn, cùng chiều cao với công tắc ngôn ngữ. */
.mh-auth--gate .mh-auth-btn,
.mh-auth--gate .mh-auth-trigger { min-height: 42px; font-size: 12.5px; }

/* ------------------------------- menu ---------------------------------- */

.mh-auth-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  z-index: 9999;
  width: 288px;
  max-width: calc(100vw - 24px);
  padding: 6px;
  border: 1px solid var(--mh-auth-line);
  border-radius: 16px;
  background: var(--mh-auth-card);
  color: var(--mh-auth-ink);
  box-shadow:
    0 20px 48px rgba(16, 30, 22, 0.18),
    0 2px 0 rgba(255, 255, 255, 0.16) inset;
  transform-origin: top right;
  animation: mh-auth-pop 0.16s ease both;
}

@keyframes mh-auth-pop {
  from { opacity: 0; transform: translateY(-6px) scale(0.985); }
  to { opacity: 1; transform: none; }
}

.mh-auth-profile {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 9px 8px;
}

.mh-auth-profile .mh-auth-avatar { width: 38px; height: 38px; }

.mh-auth-ident { min-width: 0; flex: 1; display: grid; gap: 3px; }
.mh-auth-name-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

.mh-auth-ident strong {
  font-size: 13px;
  font-weight: 700;
  line-height: 1.3;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mh-auth-cust-line {
  display: flex;
  align-items: center;
  gap: 5px;
  min-width: 0;
  line-height: 1.4;
  margin-top: 1px;
}

.mh-auth-id-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 7px;
  border-radius: 6px;
  border: 1px solid var(--mh-auth-line);
  background: var(--mh-auth-soft);
  color: var(--mh-auth-muted);
  cursor: pointer;
  font: inherit;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.03em;
  line-height: 1.35;
  transition: all 0.15s ease;
}

.mh-auth-id-badge:hover {
  border-color: var(--mh-auth-green);
  color: var(--mh-auth-green-ink);
  background: color-mix(in srgb, var(--mh-auth-green) 8%, var(--mh-auth-soft));
}

.mh-auth-id-badge.is-copied {
  border-color: #22c55e;
  color: #16a34a;
  background: rgba(34, 197, 94, 0.12);
}

.mh-auth-id-icon {
  display: inline-flex;
  align-items: center;
  color: currentColor;
  opacity: 0.65;
}

.mh-auth-id-badge:hover .mh-auth-id-icon,
.mh-auth-id-badge.is-copied .mh-auth-id-icon {
  opacity: 1;
}

.mh-auth-cust-pending {
  font-family: inherit;
  font-size: 10.5px;
  font-weight: 500;
  color: var(--mh-auth-muted);
}

.mh-auth-copy {
  display: none;
}

.mh-auth-points-val {
  color: var(--mh-auth-gold);
}

.mh-auth-plan {
  flex-shrink: 0;
  padding: 3px 8px;
  border: 1px solid var(--mh-auth-line);
  border-radius: 999px;
  font-size: 9.5px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mh-auth-muted);
  background: var(--mh-auth-soft);
}

.mh-auth-plan[data-plan="pro"] {
  border-color: color-mix(in srgb, var(--mh-auth-gold) 45%, transparent);
  color: var(--mh-auth-gold);
  background: color-mix(in srgb, var(--mh-auth-gold) 12%, transparent);
}

.mh-auth-sep {
  height: 1px;
  margin: 4px 7px;
  background: var(--mh-auth-line);
}

.mh-auth .mh-auth-item,
.mh-auth .mh-auth-signout {
  display: flex;
  align-items: center;
  gap: 9px;
  width: 100%;
  min-height: 34px;
  padding: 6px 9px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--mh-auth-ink);
  font: inherit;
  font-size: 12.5px;
  font-weight: 500;
  line-height: 1.35;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}

.mh-auth .mh-auth-item:hover,
.mh-auth .mh-auth-signout:hover {
  background: var(--mh-auth-soft);
  color: var(--mh-auth-green-ink);
}

.mh-auth-item svg,
.mh-auth-signout svg { flex-shrink: 0; color: var(--mh-auth-muted); }

.mh-auth-signout { color: var(--mh-auth-muted); }

/* ------------------- trạng thái tức thì trong dropdown -------------------- */
.mh-auth-quota {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  font-size: 11.5px;
  color: var(--mh-auth-muted);
}

.mh-auth-quota-icon {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}
.mh-auth-quota-icon svg { width: 14px; height: 14px; }
.mh-auth-points-icon { color: var(--mh-auth-gold); }

.mh-auth-quota-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mh-auth-quota strong {
  margin-left: auto;
  color: var(--mh-auth-ink);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.mh-auth-go {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  font-style: normal;
  font-size: 12px;
  color: var(--mh-auth-muted);
}
.mh-auth .mh-auth-item .mh-auth-go svg {
  width: 13px;
  height: 13px;
  color: inherit;
}

.mh-auth .mh-auth-item:hover .mh-auth-go {
  color: var(--mh-auth-green-ink);
}

/* Tên hiển thị ngắn dần trên màn hình hẹp để nav không bị đẩy xuống. */
@media (max-width: 1000px) {
  .mh-auth-name { max-width: 84px; }
}

@media (max-width: 760px) {
  .mh-auth-name { display: none; }
  .mh-auth-trigger { padding: 3px; }
  .mh-auth--gate .mh-auth-trigger { padding: 3px; }
  .mh-auth-menu {
    position: fixed;
    top: 68px;
    right: 10px;
    left: 10px;
    width: auto;
    max-height: calc(100dvh - 84px);
    overflow: auto;
  }
}

/* Trang chủ dùng body.light-mode; Speaking dùng [data-theme="dark"]. */
body:not(.light-mode) .mh-auth-menu,
[data-theme='dark'] .mh-auth-menu {
  box-shadow:
    0 22px 54px rgba(0, 0, 0, 0.5),
    0 1px 0 rgba(255, 255, 255, 0.06) inset;
}

[data-theme='dark'] .mh-auth {
  color-scheme: dark;
  --mh-auth-ink: var(--ac-ink, #e4e7e4);
  --mh-auth-muted: var(--ac-muted, #94a39b);
  --mh-auth-line: var(--ac-line, #24352c);
  --mh-auth-card: var(--ac-paper, #14201a);
  --mh-auth-soft: var(--ac-soft, #192720);
  --mh-auth-green: var(--ac-green, #3ea88b);
  --mh-auth-green-ink: var(--ac-green, #52c7a6);
}

@media (prefers-reduced-motion: reduce) {
  .mh-auth-menu { animation: none; }
  .mh-auth-caret { transition: none; }
}

/* Toast dùng khi trang không có MatrixShell (Gate, trang chủ). */
.mh-auth-toast {
  position: fixed;
  left: 50%;
  bottom: 26px;
  z-index: 10010;
  transform: translateX(-50%);
  max-width: 90vw;
  padding: 10px 16px;
  border-radius: 12px;
  background: #22281f;
  color: #f7f5ef;
  font: 600 13.5px/1.5 var(--font-body, system-ui, sans-serif);
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
}