/* Tham tu Amateur - bo cau do de. Moi rule deu nam trong .tta-riddle.
   Khong dung CSS Grid, khong dung position absolute/fixed. */:root {
  /* mau - lay tu bang mau cua site */
  --ttr-ink: #0b0b0c;
  --ttr-charcoal: #161719;
  --ttr-graphite: #383a3f;
  --ttr-ash: #a4a6ab;
  --ttr-paper: #ece6d8;
  --ttr-paper-bright: #f7f3e9;
  --ttr-paper-shade: #d8cfbb;
  --ttr-paper-dim: #58564e;
  --ttr-red: #b3261e;
  --ttr-red-deep: #7c1712;
  --ttr-ok: #2f6b3a;

  /* chu */
  --ttr-font-display: 'Archivo Narrow', 'Be Vietnam Pro', system-ui, sans-serif;
  --ttr-font-body: 'Be Vietnam Pro', system-ui, sans-serif;
  --ttr-font-mono: 'IBM Plex Mono', ui-monospace, monospace;

  --ttr-text-xs: 0.74rem;
  --ttr-text-sm: 0.86rem;
  --ttr-text-md: 1rem;
  --ttr-text-lg: 1.18rem;
  --ttr-text-xl: 1.5rem;
  --ttr-text-2xl: 2rem;

  /* khoang cach */
  --ttr-sp-1: 0.35rem;
  --ttr-sp-2: 0.6rem;
  --ttr-sp-3: 0.9rem;
  --ttr-sp-4: 1.3rem;
  --ttr-sp-5: 1.9rem;

  --ttr-radius: 2px;
  --ttr-tap: 2.9rem;
  --ttr-speed: 160ms;
  --ttr-ease: cubic-bezier(0.2, 0.7, 0.3, 1);
}.tta-riddle {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--ttr-sp-4);
  width: 100%;
  font-family: var(--ttr-font-body);
  color: var(--ttr-ink);
}.tta-riddle *,
.tta-riddle *::before,
.tta-riddle *::after { box-sizing: border-box; }.tta-riddle p,
.tta-riddle ol,
.tta-riddle ul,
.tta-riddle li { margin: 0; padding: 0; list-style: none; }

/* ---------- thanh tren ---------- */.tta-riddle .ttr-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--ttr-sp-3);
}.tta-riddle .ttr-count {
  font-family: var(--ttr-font-mono);
  font-size: var(--ttr-text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ttr-red);
  flex: 0 0 auto;
}.tta-riddle .ttr-bar {
  display: flex;
  flex: 1 1 8rem;
  min-width: 6rem;
  height: 3px;
  background: var(--ttr-paper-shade);
  border-radius: var(--ttr-radius);
  overflow: hidden;
}.tta-riddle .ttr-bar-fill {
  background: var(--ttr-red);
  transition: flex-basis var(--ttr-speed) var(--ttr-ease);
}.tta-riddle .ttr-score {
  font-family: var(--ttr-font-mono);
  font-size: var(--ttr-text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ttr-paper-dim);
  flex: 0 0 auto;
}
/* ---------- the cau do ---------- */.tta-riddle .ttr-card {
  display: flex;
  flex-direction: column;
  gap: var(--ttr-sp-3);
  min-width: 0;
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
}.tta-riddle .ttr-kicker {
  font-family: var(--ttr-font-mono);
  font-size: var(--ttr-text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ttr-paper-dim);
}.tta-riddle .ttr-q {
  font-family: var(--ttr-font-display);
  font-weight: 700;
  font-size: var(--ttr-text-xl);
  line-height: 1.3;
  color: var(--ttr-ink);
  /* Astra viet hoa moi heading - de bai dai nen tra lai chu thuong */
  text-transform: none;
  letter-spacing: 0;
}

/* ---------- o dien dap an ---------- */.tta-riddle .ttr-form {
  display: flex;
  flex-direction: column;
  gap: var(--ttr-sp-2);
  margin: 0;
}.tta-riddle .ttr-label {
  font-family: var(--ttr-font-mono);
  font-size: var(--ttr-text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ttr-paper-dim);
}.tta-riddle .ttr-row {
  display: flex;
  flex-wrap: wrap;
  align-items: stretch;
  gap: var(--ttr-sp-2);
}.tta-riddle .ttr-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  /* khoang cach giua hai tieng ro hon khoang cach giua hai o chu */
  gap: var(--ttr-sp-1) var(--ttr-sp-4);
  padding: 0;
}
.tta-riddle .ttr-word {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ttr-sp-1);
}
.tta-riddle .ttr-box {
  width: 2.5rem;
  height: var(--ttr-tap);
  min-width: 0;
  /* Astra dat padding 17px 40px cho moi o nhap -> bo di */
  padding: 0;
  margin: 0;
  text-align: center;
  font-family: var(--ttr-font-display);
  font-weight: 700;
  font-size: 1.25rem;
  line-height: 1;
  text-transform: uppercase;
  color: var(--ttr-ink);
  background: var(--ttr-paper-bright);
  border: 1px solid var(--ttr-paper-shade);
  border-bottom: 2px solid var(--ttr-graphite);
  border-radius: var(--ttr-radius);
  box-shadow: none;
  transition: border-color var(--ttr-speed) var(--ttr-ease),
              background-color var(--ttr-speed) var(--ttr-ease);
}
.tta-riddle .ttr-box:focus,
.tta-riddle .ttr-box:focus-visible {
  outline: 2px solid var(--ttr-red);
  outline-offset: 1px;
  border-bottom-color: var(--ttr-red);
  background: #fff;
}
/* ky tu do goi y mo ra - khoa lai, khong go de len duoc */
.tta-riddle .ttr-box.is-given {
  color: var(--ttr-red-deep);
  background: var(--ttr-paper-shade);
  border-bottom-color: var(--ttr-red-deep);
  cursor: default;
}
.tta-riddle .ttr-box.is-done {
  color: var(--ttr-ok);
  background: var(--ttr-paper-bright);
  border-bottom-color: var(--ttr-ok);
}
.tta-riddle .ttr-box.is-shown {
  color: var(--ttr-paper-dim);
  background: var(--ttr-paper);
}
.tta-riddle .ttr-grid-note {
  font-family: var(--ttr-font-mono);
  font-size: var(--ttr-text-xs);
  color: var(--ttr-paper-dim);
}
@media (max-width: 540px) {
  .tta-riddle .ttr-box { width: 2.1rem; height: 2.6rem; font-size: 1.1rem; }
}

/* ---------- nut ---------- */.tta-riddle .ttr-btn,
.tta-riddle .ttr-btn--quiet {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--ttr-sp-1);
  min-height: var(--ttr-tap);
  padding: var(--ttr-sp-2) var(--ttr-sp-4);
  font-family: var(--ttr-font-display);
  font-weight: 700;
  font-size: var(--ttr-text-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--ttr-radius);
  border: 2px solid var(--ttr-ink);
  cursor: pointer;
  transition: background-color var(--ttr-speed) var(--ttr-ease),
              color var(--ttr-speed) var(--ttr-ease),
              border-color var(--ttr-speed) var(--ttr-ease);
}.tta-riddle .ttr-btn { background: var(--ttr-ink); color: var(--ttr-paper-bright); }.tta-riddle .ttr-btn:hover { background: var(--ttr-red); border-color: var(--ttr-red); }.tta-riddle .ttr-btn--quiet { background: transparent; color: var(--ttr-ink); border-color: var(--ttr-paper-shade); }.tta-riddle .ttr-btn--quiet:hover { border-color: var(--ttr-ink); }.tta-riddle .ttr-btn:focus-visible,
.tta-riddle .ttr-btn--quiet:focus-visible {
  outline: 2px solid var(--ttr-red);
  outline-offset: 2px;
}.tta-riddle .ttr-btn[disabled],
.tta-riddle .ttr-btn--quiet[disabled] {
  opacity: 0.45;
  cursor: not-allowed;
  background: transparent;
  color: var(--ttr-paper-dim);
  border-color: var(--ttr-paper-shade);
}
/* ---------- phan hoi ---------- */.tta-riddle .ttr-feedback {
  display: flex;
  align-items: baseline;
  gap: var(--ttr-sp-1);
  font-family: var(--ttr-font-mono);
  font-size: var(--ttr-text-sm);
  line-height: 1.5;
  color: var(--ttr-paper-dim);
}.tta-riddle .ttr-feedback--ok { color: var(--ttr-ok); font-weight: 600; }.tta-riddle .ttr-feedback--no { color: var(--ttr-red); }

/* ---------- goi y ---------- */.tta-riddle .ttr-hint {
  display: flex;
  flex-direction: column;
  gap: var(--ttr-sp-1);
  padding: var(--ttr-sp-3);
  background: var(--ttr-paper);
  border-left: 3px solid var(--ttr-red);
  border-radius: var(--ttr-radius);
}.tta-riddle .ttr-hint-label {
  font-family: var(--ttr-font-mono);
  font-size: var(--ttr-text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ttr-red);
}.tta-riddle .ttr-hint-text {
  font-size: var(--ttr-text-sm);
  line-height: 1.6;
  color: var(--ttr-ink);
}

/* ---------- dap an ---------- */.tta-riddle .ttr-answer {
  display: flex;
  flex-direction: column;
  gap: var(--ttr-sp-2);
  padding: var(--ttr-sp-4) var(--ttr-sp-3);
  background: var(--ttr-charcoal);
  border-radius: var(--ttr-radius);
  color: var(--ttr-paper);
}.tta-riddle .ttr-answer-label {
  font-family: var(--ttr-font-mono);
  font-size: var(--ttr-text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #ff6a57;
}.tta-riddle .ttr-answer-text {
  font-family: var(--ttr-font-display);
  font-weight: 700;
  font-size: var(--ttr-text-lg);
  line-height: 1.3;
  color: var(--ttr-paper-bright);
}.tta-riddle .ttr-answer-why {
  font-size: var(--ttr-text-sm);
  line-height: 1.65;
  color: var(--ttr-ash);
}

/* ---------- hang nut dieu khien ---------- */.tta-riddle .ttr-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--ttr-sp-2);
  padding-top: var(--ttr-sp-2);
  border-top: 1px dashed var(--ttr-paper-shade);
}.tta-riddle .ttr-spacer { flex: 1 1 0; min-width: 0; }

/* ---------- day so thu tu cau ---------- */.tta-riddle .ttr-dots {
  display: flex;
  flex-wrap: wrap;
  gap: var(--ttr-sp-1);
}.tta-riddle .ttr-dot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.1rem;
  height: 2.1rem;
  font-family: var(--ttr-font-mono);
  font-size: var(--ttr-text-xs);
  color: var(--ttr-paper-dim);
  background: transparent;
  border: 1px solid var(--ttr-paper-shade);
  border-radius: var(--ttr-radius);
  cursor: pointer;
  transition: background-color var(--ttr-speed) var(--ttr-ease),
              color var(--ttr-speed) var(--ttr-ease),
              border-color var(--ttr-speed) var(--ttr-ease);
}.tta-riddle .ttr-dot:hover { border-color: var(--ttr-ink); color: var(--ttr-ink); }.tta-riddle .ttr-dot:focus-visible { outline: 2px solid var(--ttr-red); outline-offset: 2px; }.tta-riddle .ttr-dot.is-done { background: var(--ttr-ok); border-color: var(--ttr-ok); color: var(--ttr-paper-bright); }.tta-riddle .ttr-dot.is-seen { border-color: var(--ttr-graphite); color: var(--ttr-graphite); }.tta-riddle .ttr-dot.is-now { background: var(--ttr-ink); border-color: var(--ttr-ink); color: var(--ttr-paper-bright); }
/* ---------- man ket qua ---------- */.tta-riddle .ttr-end {
  display: flex;
  flex-direction: column;
  gap: var(--ttr-sp-4);
  min-width: 0;
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
}.tta-riddle .ttr-end-score {
  font-family: var(--ttr-font-display);
  font-weight: 700;
  font-size: var(--ttr-text-2xl);
  line-height: 1.15;
  color: var(--ttr-ink);
}.tta-riddle .ttr-end-note {
  font-size: var(--ttr-text-md);
  line-height: 1.65;
  color: var(--ttr-paper-dim);
}.tta-riddle .ttr-recap {
  display: flex;
  flex-direction: column;
  gap: 0;
}.tta-riddle .ttr-recap > li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--ttr-sp-2);
  padding: var(--ttr-sp-2) 0;
  border-top: 1px dashed var(--ttr-paper-shade);
}.tta-riddle .ttr-recap > li:first-child { border-top: 0; }.tta-riddle .ttr-recap-no {
  flex: 0 0 2.2rem;
  font-family: var(--ttr-font-mono);
  font-size: var(--ttr-text-xs);
  color: var(--ttr-paper-dim);
}.tta-riddle .ttr-recap-a {
  flex: 1 1 10rem;
  min-width: 0;
  font-size: var(--ttr-text-sm);
  line-height: 1.5;
  color: var(--ttr-ink);
}.tta-riddle .ttr-recap-tag {
  flex: 0 0 auto;
  font-family: var(--ttr-font-mono);
  font-size: var(--ttr-text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}.tta-riddle .ttr-recap-tag--ok { color: var(--ttr-ok); }.tta-riddle .ttr-recap-tag--no { color: var(--ttr-paper-dim); }

/* ---------- dien thoai ---------- */
@media (max-width: 48rem) {:root {
    --ttr-text-xl: 1.3rem;
    --ttr-text-2xl: 1.65rem;
    --ttr-sp-4: 1.05rem;
    --ttr-sp-5: 1.4rem;
  }.tta-riddle .ttr-actions > .ttr-btn,
.tta-riddle .ttr-actions > .ttr-btn--quiet {
    flex: 1 1 9rem;
    padding-left: var(--ttr-sp-1);
    padding-right: var(--ttr-sp-1);
    letter-spacing: 0.04em;
  }.tta-riddle .ttr-spacer { flex-basis: 100%; height: 0; }.tta-riddle .ttr-row > .ttr-btn { flex: 1 1 100%; }.tta-riddle .ttr-dot { width: 2.95rem; height: 2.95rem; }
}

/* ---------- giam chuyen dong ---------- */
@media (prefers-reduced-motion: reduce) {.tta-riddle *,
.tta-riddle *::before,
.tta-riddle *::after {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
  }
}
/* an/hien khoi */.tta-riddle [hidden] { display: none !important; }.tta-riddle a.ttr-btn,
.tta-riddle a.ttr-btn--quiet { text-decoration: none; }

/* lop vo: giu man choi xep doc du container cha cua Elementor la row */
.tta-riddle .ttr-shell {
  display: flex;
  flex-direction: row;
  justify-content: center;
  flex: 1 1 100%;
  min-width: 0;
  width: 100%;
}

/* Astra gan padding cho moi the button - go lai cho nut so thu tu */
.tta-riddle .ttr-dot { padding: 0; }

/* ---------- cot chua man choi trong khung ho so ---------- */
.tta-riddle .ttr-play {
  display: flex;
  flex-direction: column;
  gap: var(--ttr-sp-4);
  min-width: 0;
}

/* ---------- hinh minh hoa trong phan giai thich ---------- */
.tta-riddle .ttr-visual {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--ttr-sp-2);
  padding-top: var(--ttr-sp-1);
}

.tta-riddle .ttr-visual-item {
  display: flex;
  flex: 0 0 auto;
  width: 2.1rem;
  height: 2.1rem;
  color: var(--ttr-paper-bright);
}

.tta-riddle .ttr-visual-item svg { display: block; width: 100%; height: 100%; }

.tta-riddle .ttr-visual-note {
  flex: 1 1 8rem;
  min-width: 0;
  margin: 0;
  font-family: var(--ttr-font-mono);
  font-size: var(--ttr-text-xs);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ttr-ash);
}

/* ---------- thanh tien do ---------- */
.tta-riddle .ttr-top { padding-bottom: var(--ttr-sp-1); }
.tta-riddle .ttr-dot.is-miss { border-color: var(--ttr-red); color: var(--ttr-red); }