:root {
    --vlx-bg: #fff8f3;
    --vlx-bg-soft: #fff1e8;
    --vlx-card: #ffffff;
    --vlx-ink: #1f2528;
    --vlx-muted: #6f777c;
    --vlx-soft-muted: #8b9398;
    --vlx-line: rgba(31, 37, 40, 0.12);
    --vlx-line-strong: rgba(31, 37, 40, 0.18);
    --vlx-salmon: #f36f5d;
    --vlx-salmon-dark: #d95847;
    --vlx-salmon-soft: rgba(243, 111, 93, 0.12);
    --vlx-cream: #fff4ec;
    --vlx-green: #0f8a61;
    --vlx-green-soft: rgba(15, 138, 97, 0.12);
    --vlx-red: #b94a3d;
    --vlx-red-soft: rgba(185, 74, 61, 0.11);
    --vlx-shadow: 0 18px 55px rgba(31, 37, 40, 0.09);
    --vlx-shadow-soft: 0 10px 30px rgba(31, 37, 40, 0.07);
    --vlx-radius-xl: 28px;
    --vlx-radius-lg: 22px;
    --vlx-radius-md: 16px;
    --vlx-font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  }

  body {
    background: var(--vlx-bg);
  }

  #vlx-trainer,
  #vlx-trainer * {
    box-sizing: border-box;
  }

  #vlx-trainer {
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
    padding: clamp(28px, 5vw, 72px) 20px clamp(56px, 7vw, 96px);
    color: var(--vlx-ink);
    font-family: var(--vlx-font);
  }

  #vlx-trainer button,
  #vlx-trainer input,
  #vlx-trainer textarea {
    font-family: inherit;
  }

  .vlx-trainer-shell {
    display: grid;
    gap: 22px;
  }

  .vlx-hero {
    position: relative;
    overflow: hidden;
    border: 1px solid var(--vlx-line);
    border-radius: var(--vlx-radius-xl);
    background:
      radial-gradient(circle at 85% 18%, rgba(243, 111, 93, 0.18), transparent 32%),
      linear-gradient(135deg, #fffaf6 0%, #ffffff 52%, #fff0e6 100%);
    box-shadow: var(--vlx-shadow);
    padding: clamp(26px, 4.6vw, 54px);
  }

  .vlx-hero-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.28fr) minmax(280px, 0.72fr);
    gap: clamp(24px, 4vw, 46px);
    align-items: center;
  }

  .vlx-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: fit-content;
    padding: 8px 12px;
    border: 1px solid rgba(243, 111, 93, 0.24);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.72);
    color: var(--vlx-salmon-dark);
    font-size: 12px;
    font-weight: 750;
    letter-spacing: 0.04em;
    text-transform: uppercase;
  }

  .vlx-title {
    margin: 16px 0 0;
    font-size: clamp(34px, 5vw, 62px);
    line-height: 0.98;
    letter-spacing: -0.055em;
    font-weight: 820;
  }

  .vlx-title span {
    color: var(--vlx-salmon);
  }

  .vlx-subtitle {
    max-width: 680px;
    margin: 18px 0 0;
    color: var(--vlx-muted);
    font-size: clamp(16px, 2vw, 19px);
    line-height: 1.65;
  }

  .vlx-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 26px;
  }

  .vlx-button {
    border: 0;
    cursor: pointer;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    gap: 9px;
    min-height: 46px;
    padding: 12px 18px;
    border-radius: 999px;
    font-size: 14px;
    line-height: 1;
    font-weight: 760;
    text-decoration: none;
    transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease, border-color 160ms ease;
    -webkit-tap-highlight-color: transparent;
  }

  .vlx-button:hover {
    transform: translateY(-1px);
  }

  .vlx-button-primary {
    background: var(--vlx-salmon);
    color: #ffffff;
    box-shadow: 0 12px 26px rgba(243, 111, 93, 0.28);
  }

  .vlx-button-primary:hover {
    background: var(--vlx-salmon-dark);
  }

  .vlx-button-secondary {
    background: #ffffff;
    color: var(--vlx-ink);
    border: 1px solid var(--vlx-line);
    box-shadow: var(--vlx-shadow-soft);
  }

  .vlx-button-ghost {
    background: transparent;
    color: var(--vlx-muted);
    border: 1px solid var(--vlx-line);
  }

  .vlx-button-small {
    min-height: 38px;
    padding: 9px 13px;
    font-size: 12px;
  }

  .vlx-button:disabled {
    cursor: not-allowed;
    opacity: 0.55;
    transform: none;
    box-shadow: none;
  }

  .vlx-visual-card {
    min-height: 300px;
    border: 1px solid rgba(243, 111, 93, 0.18);
    border-radius: 26px;
    background:
      linear-gradient(145deg, rgba(255, 255, 255, 0.8), rgba(255, 244, 236, 0.82)),
      radial-gradient(circle at 50% 20%, rgba(243, 111, 93, 0.24), transparent 38%);
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.8);
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 24px;
    position: relative;
  }

  .vlx-visual-orb {
    width: 128px;
    height: 128px;
    margin: 0 auto 18px;
    border-radius: 34px;
    background: #ffffff;
    box-shadow: 0 20px 35px rgba(31, 37, 40, 0.11);
    display: grid;
    place-items: center;
    font-size: 54px;
    transform: rotate(-4deg);
  }

  .vlx-visual-caption {
    text-align: center;
    color: var(--vlx-muted);
    line-height: 1.55;
    font-size: 14px;
    max-width: 260px;
    margin: 0 auto;
  }

  .vlx-panel {
    border: 1px solid var(--vlx-line);
    border-radius: var(--vlx-radius-xl);
    background: rgba(255, 255, 255, 0.84);
    box-shadow: var(--vlx-shadow-soft);
    padding: clamp(20px, 3.4vw, 34px);
  }

  .vlx-panel-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 20px;
  }

  .vlx-eyebrow {
    margin: 0 0 7px;
    color: var(--vlx-salmon-dark);
    font-size: 12px;
    font-weight: 780;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }

  .vlx-section-title {
    margin: 0;
    font-size: clamp(24px, 3.2vw, 38px);
    letter-spacing: -0.04em;
    line-height: 1.05;
    font-weight: 820;
  }

  .vlx-section-desc {
    margin: 9px 0 0;
    max-width: 680px;
    color: var(--vlx-muted);
    font-size: 15px;
    line-height: 1.65;
  }

  .vlx-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .vlx-deck-card,
  .vlx-saved-card {
    border: 1px solid var(--vlx-line);
    border-radius: 22px;
    background: #ffffff;
    padding: 18px;
    min-height: 164px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 16px;
    transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
  }

  .vlx-deck-card:hover,
  .vlx-saved-card:hover {
    transform: translateY(-2px);
    border-color: rgba(243, 111, 93, 0.32);
    box-shadow: var(--vlx-shadow-soft);
  }

  .vlx-card-icon {
    width: 44px;
    height: 44px;
    border-radius: 15px;
    display: grid;
    place-items: center;
    background: var(--vlx-cream);
    color: var(--vlx-salmon-dark);
    font-size: 23px;
  }

  .vlx-card-title {
    margin: 12px 0 0;
    font-size: 18px;
    line-height: 1.2;
    letter-spacing: -0.025em;
    font-weight: 800;
  }

  .vlx-card-desc {
    margin: 7px 0 0;
    color: var(--vlx-muted);
    line-height: 1.55;
    font-size: 14px;
  }

  .vlx-search-row {
    display: flex;
    gap: 10px;
    margin-top: 24px;
    max-width: 680px;
  }

  .vlx-input {
    width: 100%;
    min-height: 48px;
    border: 1px solid var(--vlx-line);
    border-radius: 999px;
    background: #ffffff;
    color: var(--vlx-ink);
    padding: 0 16px;
    outline: none;
    font-size: 15px;
    transition: border-color 160ms ease, box-shadow 160ms ease;
  }

  .vlx-input:focus,
  .vlx-textarea:focus {
    border-color: rgba(243, 111, 93, 0.62);
    box-shadow: 0 0 0 4px rgba(243, 111, 93, 0.12);
  }

  .vlx-practice-layout {
    display: grid;
    grid-template-columns: minmax(0, 0.68fr) minmax(290px, 0.32fr);
    gap: 18px;
    align-items: start;
  }

  .vlx-practice-card {
    border: 1px solid var(--vlx-line);
    border-radius: var(--vlx-radius-xl);
    background: #ffffff;
    box-shadow: var(--vlx-shadow);
    overflow: hidden;
  }

  .vlx-practice-top {
    padding: clamp(20px, 3vw, 30px);
    border-bottom: 1px solid var(--vlx-line);
    background:
      linear-gradient(135deg, #ffffff, #fff5ef);
  }

  .vlx-word-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 18px;
  }

  .vlx-word-title {
    margin: 8px 0 0;
    font-size: clamp(32px, 4.8vw, 56px);
    line-height: 1;
    letter-spacing: -0.06em;
    font-weight: 850;
  }

  .vlx-word-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 14px;
  }

  .vlx-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 30px;
    padding: 7px 10px;
    border-radius: 999px;
    background: var(--vlx-cream);
    color: var(--vlx-muted);
    font-size: 12px;
    font-weight: 700;
  }

  .vlx-chip-strong {
    background: var(--vlx-salmon-soft);
    color: var(--vlx-salmon-dark);
  }

  .vlx-progress-wrap {
    margin-top: 24px;
  }

  .vlx-progress-label {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    color: var(--vlx-muted);
    font-size: 12px;
    font-weight: 700;
    margin-bottom: 8px;
  }

  .vlx-progress-track {
    height: 9px;
    border-radius: 999px;
    background: rgba(31, 37, 40, 0.08);
    overflow: hidden;
  }

  .vlx-progress-bar {
    height: 100%;
    width: 0%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--vlx-salmon), #f5a36f);
    transition: width 260ms ease;
  }

  .vlx-question-body {
    padding: clamp(22px, 3.6vw, 36px);
  }

  .vlx-question-label {
    margin: 0 0 9px;
    color: var(--vlx-salmon-dark);
    font-size: 12px;
    font-weight: 820;
    letter-spacing: 0.05em;
    text-transform: uppercase;
  }

  .vlx-question-title {
    margin: 0;
    font-size: clamp(24px, 3.4vw, 38px);
    line-height: 1.12;
    letter-spacing: -0.04em;
    font-weight: 830;
  }

  .vlx-question-helper {
    margin: 12px 0 0;
    color: var(--vlx-muted);
    font-size: 15px;
    line-height: 1.62;
  }

  .vlx-options {
    display: grid;
    gap: 10px;
    margin-top: 22px;
  }

  .vlx-option {
    width: 100%;
    border: 1px solid var(--vlx-line);
    border-radius: 18px;
    background: #ffffff;
    color: var(--vlx-ink);
    padding: 16px 17px;
    text-align: left;
    cursor: pointer;
    font-size: 15px;
    line-height: 1.55;
    font-weight: 650;
    transition: border-color 160ms ease, background 160ms ease, transform 160ms ease, box-shadow 160ms ease;
  }

  .vlx-option:hover {
    transform: translateY(-1px);
    border-color: rgba(243, 111, 93, 0.34);
    box-shadow: 0 10px 22px rgba(31, 37, 40, 0.06);
  }

  .vlx-option.is-correct {
    border-color: rgba(15, 138, 97, 0.48);
    background: var(--vlx-green-soft);
  }

  .vlx-option.is-wrong {
    border-color: rgba(185, 74, 61, 0.4);
    background: var(--vlx-red-soft);
  }

  .vlx-option[disabled] {
    cursor: default;
    transform: none;
  }

  .vlx-image-options {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .vlx-image-option {
    overflow: hidden;
    padding: 0;
  }

  .vlx-image-option-media {
    width: 100%;
    aspect-ratio: 1 / 0.78;
    background: var(--vlx-cream);
    overflow: hidden;
  }

  .vlx-image-option-media img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
  }

  .vlx-image-option-text {
    padding: 13px 14px 15px;
    font-size: 13px;
    line-height: 1.4;
    color: var(--vlx-muted);
    font-weight: 750;
  }

  .vlx-feedback {
    margin-top: 18px;
    border-radius: 18px;
    padding: 15px 16px;
    border: 1px solid var(--vlx-line);
    background: #fffaf6;
  }

  .vlx-feedback.is-good {
    border-color: rgba(15, 138, 97, 0.28);
    background: var(--vlx-green-soft);
  }

  .vlx-feedback.is-bad {
    border-color: rgba(185, 74, 61, 0.25);
    background: var(--vlx-red-soft);
  }

  .vlx-feedback-title {
    margin: 0;
    font-weight: 830;
    font-size: 14px;
  }

  .vlx-feedback-text {
    margin: 6px 0 0;
    color: var(--vlx-muted);
    font-size: 14px;
    line-height: 1.55;
  }

  .vlx-card-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 20px;
  }

  .vlx-side-card {
    border: 1px solid var(--vlx-line);
    border-radius: var(--vlx-radius-xl);
    background: rgba(255,255,255,0.86);
    box-shadow: var(--vlx-shadow-soft);
    padding: 20px;
    position: sticky;
    top: 24px;
  }

  .vlx-side-image {
    width: 100%;
    aspect-ratio: 1 / 0.78;
    border-radius: 20px;
    overflow: hidden;
    background: var(--vlx-cream);
    border: 1px solid rgba(243, 111, 93, 0.16);
  }

  .vlx-side-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }

  .vlx-side-title {
    margin: 16px 0 0;
    font-size: 21px;
    line-height: 1.18;
    letter-spacing: -0.025em;
    font-weight: 830;
  }

  .vlx-side-definition {
    margin: 10px 0 0;
    color: var(--vlx-muted);
    line-height: 1.58;
    font-size: 14px;
  }

  .vlx-mini-list {
    display: grid;
    gap: 8px;
    margin-top: 16px;
  }

  .vlx-mini-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    border-radius: 14px;
    background: #fff8f3;
    padding: 10px 12px;
    color: var(--vlx-muted);
    font-size: 13px;
    font-weight: 700;
  }

  .vlx-textarea {
    width: 100%;
    min-height: 136px;
    border: 1px solid var(--vlx-line);
    border-radius: 20px;
    background: #ffffff;
    color: var(--vlx-ink);
    padding: 16px;
    outline: none;
    font-size: 15px;
    line-height: 1.6;
    resize: vertical;
    margin-top: 22px;
  }

  .vlx-result-grid {
    display: grid;
    grid-template-columns: minmax(0, 0.62fr) minmax(280px, 0.38fr);
    gap: 18px;
    align-items: start;
  }

  .vlx-score-card {
    border-radius: var(--vlx-radius-xl);
    border: 1px solid var(--vlx-line);
    background:
      radial-gradient(circle at 80% 8%, rgba(243, 111, 93, 0.18), transparent 32%),
      #ffffff;
    box-shadow: var(--vlx-shadow);
    padding: clamp(24px, 4vw, 42px);
  }

  .vlx-score {
    font-size: clamp(54px, 8vw, 96px);
    line-height: 0.92;
    letter-spacing: -0.075em;
    font-weight: 860;
    color: var(--vlx-salmon);
    margin: 18px 0 0;
  }

  .vlx-result-list {
    display: grid;
    gap: 9px;
    margin-top: 24px;
  }

  .vlx-result-item {
    display: grid;
    grid-template-columns: 30px minmax(0, 1fr);
    gap: 10px;
    align-items: start;
    border: 1px solid var(--vlx-line);
    border-radius: 16px;
    padding: 12px;
    background: #ffffff;
  }

  .vlx-result-mark {
    width: 30px;
    height: 30px;
    border-radius: 999px;
    display: grid;
    place-items: center;
    font-weight: 850;
    font-size: 13px;
  }

  .vlx-result-mark.good {
    background: var(--vlx-green-soft);
    color: var(--vlx-green);
  }

  .vlx-result-mark.bad {
    background: var(--vlx-red-soft);
    color: var(--vlx-red);
  }

  .vlx-result-copy strong {
    display: block;
    font-size: 14px;
    margin-bottom: 2px;
  }

  .vlx-result-copy span {
    color: var(--vlx-muted);
    font-size: 13px;
    line-height: 1.45;
  }

  .vlx-loading {
    min-height: 360px;
    display: grid;
    place-items: center;
    text-align: center;
    border: 1px solid var(--vlx-line);
    border-radius: var(--vlx-radius-xl);
    background: #ffffff;
    box-shadow: var(--vlx-shadow-soft);
    padding: 36px;
  }

  .vlx-loader-dot {
    width: 54px;
    height: 54px;
    border-radius: 18px;
    margin: 0 auto 16px;
    background: var(--vlx-cream);
    display: grid;
    place-items: center;
    color: var(--vlx-salmon);
    font-size: 26px;
    animation: vlxPulse 1.2s ease-in-out infinite;
  }

  @keyframes vlxPulse {
    0%, 100% { transform: scale(1); opacity: 0.72; }
    50% { transform: scale(1.05); opacity: 1; }
  }

  .vlx-toast {
    position: fixed;
    left: 50%;
    bottom: 22px;
    z-index: 9999;
    transform: translateX(-50%);
    display: none;
    max-width: calc(100vw - 32px);
    border: 1px solid rgba(243, 111, 93, 0.22);
    border-radius: 999px;
    background: rgba(31, 37, 40, 0.92);
    color: #ffffff;
    box-shadow: 0 16px 40px rgba(31, 37, 40, 0.22);
    padding: 12px 16px;
    font-size: 13px;
    font-weight: 750;
  }

  .vlx-toast.is-visible {
    display: block;
  }

  @media (max-width: 920px) {
    .vlx-hero-grid,
    .vlx-practice-layout,
    .vlx-result-grid {
      grid-template-columns: 1fr;
    }

    .vlx-side-card {
      position: relative;
      top: auto;
    }

    .vlx-grid {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .vlx-image-options {
      grid-template-columns: 1fr;
    }
  }

  @media (max-width: 640px) {
    #vlx-trainer {
      padding-left: 14px;
      padding-right: 14px;
    }

    .vlx-hero,
    .vlx-panel,
    .vlx-practice-card,
    .vlx-side-card,
    .vlx-score-card {
      border-radius: 22px;
    }

    .vlx-grid {
      grid-template-columns: 1fr;
    }

    .vlx-search-row {
      flex-direction: column;
    }

    .vlx-button {
      width: 100%;
    }

    .vlx-panel-header,
    .vlx-word-row {
      flex-direction: column;
    }

    .vlx-visual-card {
      min-height: 230px;
    }

    .vlx-visual-orb {
      width: 104px;
      height: 104px;
      font-size: 44px;
      border-radius: 28px;
    }
  }
  /* === VLX Speaking MVP Patch === */

.vlx-use-tabs {
  display: inline-flex;
  gap: 8px;
  padding: 6px;
  margin-top: 22px;
  border: 1px solid var(--vlx-line);
  border-radius: 999px;
  background: #fff8f3;
}

.vlx-use-tab {
  border: 0;
  cursor: pointer;
  min-height: 36px;
  padding: 8px 14px;
  border-radius: 999px;
  background: transparent;
  color: var(--vlx-muted);
  font-size: 13px;
  font-weight: 800;
}

.vlx-use-tab.is-active {
  background: #ffffff;
  color: var(--vlx-salmon-dark);
  box-shadow: var(--vlx-shadow-soft);
}

.vlx-speak-box {
  margin-top: 18px;
  padding: 18px;
  border: 1px solid var(--vlx-line);
  border-radius: 22px;
  background: #fffaf6;
}

.vlx-speak-prompt {
  margin: 0 0 12px;
  color: var(--vlx-ink);
  font-size: 15px;
  line-height: 1.6;
  font-weight: 750;
}

.vlx-speak-note {
  margin: 8px 0 0;
  color: var(--vlx-muted);
  font-size: 13px;
  line-height: 1.55;
}

.vlx-record-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.vlx-record-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 14px;
  color: var(--vlx-muted);
  font-size: 13px;
  font-weight: 750;
}

.vlx-record-dot {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--vlx-line-strong);
}

.vlx-record-dot.is-on {
  background: var(--vlx-red);
  animation: vlxRecordPulse 1s ease-in-out infinite;
}

@keyframes vlxRecordPulse {
  0%, 100% {
    transform: scale(1);
    opacity: 0.65;
  }
  50% {
    transform: scale(1.35);
    opacity: 1;
  }
}

.vlx-audio-player {
  width: 100%;
  margin-top: 14px;
}

.vlx-speaking-result {
  margin-top: 16px;
  padding: 15px 16px;
  border-radius: 18px;
  border: 1px solid rgba(243, 111, 93, 0.18);
  background: #ffffff;
}

.vlx-speaking-result-title {
  margin: 0;
  color: var(--vlx-ink);
  font-size: 14px;
  font-weight: 850;
}

.vlx-speaking-result-text {
  margin: 7px 0 0;
  color: var(--vlx-muted);
  font-size: 14px;
  line-height: 1.6;
}

.vlx-transcript-box {
  margin-top: 10px;
  padding: 12px 13px;
  border-radius: 14px;
  background: #fff8f3;
  color: var(--vlx-ink);
  font-size: 14px;
  line-height: 1.55;
}

.vlx-speaking-error {
  margin-top: 12px;
  color: var(--vlx-red);
  font-size: 13px;
  line-height: 1.5;
  font-weight: 750;
}

@media (max-width: 640px) {
  .vlx-use-tabs {
    width: 100%;
  }

  .vlx-use-tab {
    flex: 1;
  }

  .vlx-record-row .vlx-button {
    width: 100%;
  }
}