*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

  :root {
    --ink: #1a1209;
    --paper: #f5f0e8;
    --cream: #ede6d6;
    --terracotta: #c4522a;
    --gold: #b8901f;
    --sage: #5a7a5e;
    --shadow: rgba(26,18,9,0.15);
  }

  body {
    background: var(--paper);
    font-family: 'DM Mono', monospace;
    color: var(--ink);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 2rem 1rem 4rem;
    background-image:
      repeating-linear-gradient(0deg, transparent, transparent 27px, rgba(180,160,120,0.12) 28px),
      url("data:image/svg+xml,%3Csvg width='200' height='200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  }

  header {
    text-align: center;
    margin-bottom: 2.5rem;
    position: relative;
    width: min(460px, 90vw);
    display: flex;
    align-items: flex-start;
    justify-content: center;
  }

  .header-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
  }

  .btn-review-corner {
    position: absolute;
    top: 0;
    right: 0;
    background: none;
    border: 1.5px solid var(--gold);
    border-radius: 3px;
    padding: 0.35rem 0.6rem;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.15rem;
    transition: all 0.18s ease;
    font-family: 'DM Mono', monospace;
  }

  .btn-review-corner:hover {
    background: var(--gold);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--shadow);
  }

  .btn-review-corner:hover .review-corner-star,
  .btn-review-corner:hover .review-corner-label { color: #fff; }

  .btn-review-corner.has-cards {
    border-color: var(--gold);
    background: var(--gold);
  }

  .btn-review-corner.has-cards .review-corner-star,
  .btn-review-corner.has-cards .review-corner-label { color: #fff; }

  .review-corner-star {
    font-size: 1rem;
    color: var(--gold);
    line-height: 1;
  }

  .review-corner-label {
    font-size: 0.5rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--gold);
    line-height: 1;
  }

  .review-count-badge {
    font-size: 0.48rem;
    background: var(--terracotta);
    color: #fff;
    border-radius: 99px;
    padding: 0.05rem 0.35rem;
    letter-spacing: 0.05em;
  }

  .header-rule {
    width: 60px;
    height: 2px;
    background: var(--terracotta);
    margin: 0.6rem auto;
  }

  h1 {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--ink);
    line-height: 1;
  }

  .subtitle {
    font-size: 0.72rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--gold);
    margin-top: 0.3rem;
  }

  /* Progress */
  .progress-bar-wrap {
    width: min(460px, 90vw);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.8rem;
  }

  .progress-track {
    flex: 1;
    height: 3px;
    background: var(--cream);
    border-radius: 99px;
    overflow: hidden;
  }

  .progress-fill {
    height: 100%;
    background: var(--terracotta);
    border-radius: 99px;
    transition: width 0.4s ease;
  }

  .progress-label {
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    color: var(--gold);
    white-space: nowrap;
  }

  /* Score badges */
  .scores {
    display: flex;
    gap: 1.2rem;
    margin-bottom: 1.8rem;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
  }

  .score-badge {
    display: flex;
    align-items: center;
    gap: 0.4rem;
  }

  .dot { width: 8px; height: 8px; border-radius: 50%; }
  .dot.green { background: var(--sage); }
  .dot.red { background: var(--terracotta); }

  /* CARD */
  .card-scene {
    width: min(460px, 90vw);
    height: 280px;
    perspective: 1200px;
    cursor: pointer;
    margin-bottom: 2rem;
  }

  .card-inner {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.55s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .card-inner.flipped {
    transform: rotateY(180deg);
  }

  .card-face {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2.5rem;
    box-shadow:
      0 1px 0 rgba(255,255,255,0.7) inset,
      0 8px 32px var(--shadow),
      0 2px 6px rgba(26,18,9,0.08);
    border: 1px solid rgba(180,150,100,0.25);
  }

  .card-front {
    background: var(--cream);
    background-image: url("data:image/svg+xml,%3Csvg width='100' height='100' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100' height='100' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  }

  .card-back {
    background: var(--ink);
    background-image: url("data:image/svg+xml,%3Csvg width='100' height='100' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100' height='100' filter='url(%23n)' opacity='0.06'/%3E%3C/svg%3E");
    transform: rotateY(180deg);
    color: var(--paper);
    border-color: rgba(255,255,255,0.08);
  }

  .card-number {
    position: absolute;
    top: 1rem;
    left: 1.4rem;
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    opacity: 0.4;
    text-transform: uppercase;
  }

  .card-back .card-number { color: var(--paper); }

  .card-hint {
    position: absolute;
    bottom: 1rem;
    font-size: 0.6rem;
    letter-spacing: 0.12em;
    opacity: 0.35;
    text-transform: uppercase;
  }

  .card-word {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2.4rem, 8vw, 3.6rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    text-align: center;
    line-height: 1.1;
    color: var(--ink);
  }

  .card-back .card-word {
    color: var(--paper);
    font-size: clamp(1.6rem, 5vw, 2.4rem);
    font-style: italic;
    font-weight: 400;
    margin-bottom: 0.5rem;
  }

  .card-pos {
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--gold);
    margin-top: 0.5rem;
  }

  .card-back .card-pos {
    color: rgba(245,240,232,0.45);
  }

  .accent-line {
    width: 32px;
    height: 2px;
    background: var(--terracotta);
    margin: 1rem auto 0;
  }

  /* Buttons */
  .controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    width: min(460px, 90vw);
  }

  .answer-btns {
    display: flex;
    gap: 0.8rem;
    width: 100%;
  }

  .btn {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1.5px solid var(--ink);
    background: transparent;
    font-family: 'DM Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.18s ease;
    border-radius: 2px;
    color: var(--ink);
  }

  .btn:hover { transform: translateY(-2px); }

  .btn-wrong {
    border-color: var(--terracotta);
    color: var(--terracotta);
  }
  .btn-wrong:hover { background: var(--terracotta); color: #fff; }

  .btn-right {
    border-color: var(--sage);
    color: var(--sage);
  }
  .btn-right:hover { background: var(--sage); color: #fff; }

  .btn-flip {
    width: 100%;
    background: var(--ink);
    color: var(--paper);
    border-color: var(--ink);
    padding: 0.9rem;
  }
  .btn-flip:hover { background: #2e2518; }

  .btn-next {
    width: 100%;
    background: var(--terracotta);
    color: #fff;
    border-color: var(--terracotta);
    padding: 0.9rem;
  }
  .btn-next:hover { background: #a8431f; }

  .btn-shuffle {
    width: 100%;
    border-color: rgba(26,18,9,0.3);
    color: rgba(26,18,9,0.5);
    font-size: 0.65rem;
  }
  .btn-shuffle:hover { border-color: var(--ink); color: var(--ink); transform: none; }

  .hidden { display: none !important; }

  /* Completion */
  .complete-screen {
    text-align: center;
    padding: 3rem 2rem;
    max-width: 460px;
  }

  .complete-screen h2 {
    font-family: 'Playfair Display', serif;
    font-size: 2.4rem;
    margin-bottom: 0.5rem;
  }

  .complete-screen p {
    font-size: 0.78rem;
    letter-spacing: 0.05em;
    opacity: 0.6;
    margin-bottom: 2rem;
    line-height: 1.8;
  }

  .final-score {
    font-family: 'Playfair Display', serif;
    font-size: 4rem;
    font-weight: 700;
    color: var(--terracotta);
    display: block;
    margin-bottom: 0.2rem;
  }

  .subtitle-select-wrap {
    margin-top: 0.5rem;
    position: relative;
    display: inline-block;
  }

  .subtitle-select {
    appearance: none;
    -webkit-appearance: none;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--gold);
    font-family: 'DM Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--gold);
    padding: 0.2rem 1.4rem 0.2rem 0.2rem;
    cursor: pointer;
    outline: none;
    text-align: center;
  }

  .subtitle-select:hover { color: var(--terracotta); border-bottom-color: var(--terracotta); }

  .subtitle-select-wrap::after {
    content: '▾';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gold);
    font-size: 0.65rem;
    pointer-events: none;
  }

  .action-row { display: flex; gap: 0.6rem; width: 100%; }
  .btn-review-add { flex: 1; border-color: var(--gold); color: var(--gold); font-size: 0.68rem; }
  .btn-review-add:hover, .btn-review-add.added { background: var(--gold); color: #fff; border-color: var(--gold); }

  .review-screen { width: min(460px, 90vw); display: flex; flex-direction: column; gap: 1.2rem; }
  .review-header { text-align: center; }
  .review-title { font-family: 'Playfair Display', serif; font-size: 1.5rem; font-weight: 700; margin-bottom: 0.2rem; }
  .review-desc { font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--gold); }
  .review-list { display: flex; flex-direction: column; gap: 0.5rem; max-height: 360px; overflow-y: auto; padding-right: 0.2rem; }
  .review-item { display: flex; align-items: center; justify-content: space-between; background: var(--cream); border: 1px solid rgba(180,150,100,0.25); border-radius: 3px; padding: 0.65rem 0.9rem; gap: 0.8rem; }
  .review-item-text { flex: 1; }
  .review-item-es { font-family: 'Playfair Display', serif; font-size: 1rem; font-weight: 700; display: block; line-height: 1.2; }
  .review-item-en { font-size: 0.65rem; letter-spacing: 0.05em; color: var(--gold); display: block; margin-top: 0.15rem; }
  .btn-remove { background: none; border: 1px solid rgba(196,82,42,0.3); border-radius: 2px; color: var(--terracotta); font-size: 0.65rem; padding: 0.3rem 0.5rem; cursor: pointer; font-family: 'DM Mono', monospace; white-space: nowrap; transition: all 0.15s; flex-shrink: 0; }
  .btn-remove:hover { background: var(--terracotta); color: #fff; border-color: var(--terracotta); }
  .review-empty { text-align: center; padding: 2rem 1rem; font-size: 0.72rem; opacity: 0.4; letter-spacing: 0.08em; }
  .review-actions { display: flex; flex-direction: column; }

  /* Round word list on complete screen */
  .round-words {
    width: 100%;
    border-top: 1px solid rgba(180,150,100,0.25);
    border-bottom: 1px solid rgba(180,150,100,0.25);
    padding: 1rem 0;
    margin: 0 auto;
  }

  .round-words-title {
    font-size: 0.62rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--gold);
    margin-bottom: 0.7rem;
    text-align: center;
  }

  .round-words-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.35rem 1rem;
  }

  .round-word-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.5rem;
    padding: 0.25rem 0;
    border-bottom: 1px solid rgba(180,150,100,0.1);
    font-size: 0.7rem;
  }

  .round-word-es {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    color: var(--ink);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex-shrink: 0;
    max-width: 55%;
  }

  .round-word-en {
    color: var(--gold);
    font-size: 0.62rem;
    letter-spacing: 0.03em;
    text-align: right;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .round-word-row.wrong .round-word-es { color: var(--terracotta); }
  .round-word-row.wrong .round-word-en { color: var(--terracotta); opacity: 0.7; }

  .mode-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    width: min(460px, 90vw);
    padding-top: 0.5rem;
  }
  .mode-screen h2 {
    font-family: 'Playfair Display', serif;
    font-size: 1.3rem;
    font-weight: 400;
    font-style: italic;
    margin-bottom: 0.4rem;
  }
  .mode-screen p {
    font-size: 0.68rem;
    letter-spacing: 0.1em;
    opacity: 0.5;
    margin-bottom: 2rem;
    text-transform: uppercase;
  }
  .mode-cards {
    display: flex;
    gap: 1rem;
    width: 100%;
    margin-bottom: 2rem;
  }
  .mode-option {
    flex: 1;
    border: 1.5px solid rgba(26,18,9,0.2);
    border-radius: 4px;
    padding: 1.5rem 1rem;
    cursor: pointer;
    background: var(--cream);
    transition: all 0.2s ease;
    text-align: center;
  }
  .mode-option:hover { border-color: var(--terracotta); transform: translateY(-3px); box-shadow: 0 8px 24px var(--shadow); }
  .mode-option.selected { border-color: var(--terracotta); background: var(--ink); color: var(--paper); box-shadow: 0 8px 24px var(--shadow); }
  .mode-option .mode-flag { font-size: 1.8rem; margin-bottom: 0.6rem; display: block; }
  .mode-option .mode-title { font-family: 'Playfair Display', serif; font-size: 1rem; display: block; margin-bottom: 0.3rem; }
  .mode-option .mode-desc { font-size: 0.6rem; letter-spacing: 0.1em; text-transform: uppercase; opacity: 0.5; display: block; }
  .mode-option.selected .mode-desc { opacity: 0.35; }
  .btn-start { width: 100%; background: var(--terracotta); color: #fff; border-color: var(--terracotta); padding: 1rem; font-size: 0.8rem; }
  .btn-start:hover { background: #a8431f; }
  .mode-badge { font-size: 0.6rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--gold); margin-bottom: 1rem; opacity: 0.7; }

  @keyframes cardIn {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
  }
  .card-scene { animation: cardIn 0.35s ease; }