/* Pantalla de práctica con tarjeta giratoria */

.practice {
    --card-w: 460px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 22px;
}

.practice-top {
    width: min(100%, var(--card-w));
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

/* Título de la práctica (p. ej. categoría de vocabulario) */
.practice-head {
    width: min(100%, var(--card-w));
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: -8px;
}

.practice-title {
    min-width: 0;
    margin: 0;
    overflow: hidden;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.5rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Marcador */
.score {
    display: flex;
    gap: 6px;
}

.score-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 68px;
    padding: 6px 12px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--surface);
    box-shadow: var(--shadow-sm);
    line-height: 1.2;
}

.score-value {
    font-weight: 800;
    font-size: 1.05rem;
    font-variant-numeric: tabular-nums;
}

.score-sep {
    color: var(--text-muted);
    margin-inline: 1px;
}

.score-label {
    color: var(--text-muted);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* Tarjeta */
.flip-card {
    position: relative;
    width: min(100%, var(--card-w));
    height: 340px;
    perspective: 1400px;
}

.flip-card .front,
.flip-card .back {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 28px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    background: var(--surface);
    box-shadow: var(--shadow-lg);
    text-align: center;
    overflow: hidden;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transition: transform 0.6s var(--ease), background-color 0.3s;
}

/* Franja de color del tiempo verbal */
.flip-card .front::before {
    content: "";
    position: absolute;
    inset: 0 0 auto;
    height: 6px;
    background: linear-gradient(90deg, var(--tone), color-mix(in srgb, var(--tone) 40%, transparent));
}

.flip-card .back {
    transform: rotateY(180deg);
    pointer-events: none;
}

.flip-card.flipped .front {
    transform: rotateY(-180deg);
    pointer-events: none;
}

.flip-card.flipped .back {
    transform: rotateY(0);
}

.flip-card.correct .back {
    border-color: transparent;
    background: linear-gradient(150deg, #1fb86a, #0f8a4a);
    color: #ffffff;
}

.flip-card.incorrect .back {
    border-color: transparent;
    background: linear-gradient(150deg, #ec5a5f, #c22f36);
    color: #ffffff;
}

.flip-card.almost .back {
    border-color: transparent;
    background: linear-gradient(150deg, #f2b33d, #d9821e);
    color: #ffffff;
}

.flip-card.flipped .back {
    pointer-events: auto; /* permite pulsar el botón de escuchar del resultado */
}

.flip-card.correct.flipped {
    animation: bounce 0.5s var(--ease) 0.45s;
}

.flip-card.incorrect.flipped {
    animation: shake 0.45s ease-in-out 0.5s;
}

/* Cara frontal */
.flip-card .chip {
    align-self: center;
    margin-bottom: 8px;
}

.verb-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    max-width: 100%;
}

/* Botón de escuchar oculto cuando la palabra mostrada no está en el idioma que se aprende */
.flip-card[data-audio="off"] #speak-word {
    display: none;
}

.verb {
    min-width: 0;
    margin: 0;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(2.2rem, 8vw, 2.9rem);
    letter-spacing: -0.02em;
    overflow-wrap: anywhere;
}

.translation {
    margin: 0;
    color: var(--text-muted);
    font-style: italic;
}

.answer-row {
    width: min(100%, 340px);
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 22px;
}

.subject {
    font-weight: 800;
    font-size: 1.15rem;
    color: color-mix(in srgb, var(--tone) 72%, var(--text));
    white-space: nowrap;
}

.answer-input {
    flex: 1;
    min-width: 0;
    padding: 12px 14px;
    border-radius: 12px;
    border: 2px solid var(--border);
    background: var(--surface-2);
    font-size: 1.15rem;
    font-weight: 700;
    transition: border-color 0.2s, background-color 0.2s, box-shadow 0.2s;
}

.answer-input::placeholder {
    color: var(--text-muted);
    font-weight: 600;
    opacity: 0.7;
}

.answer-input:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--surface);
    box-shadow: 0 0 0 4px var(--primary-soft);
}

.verify-btn {
    width: min(100%, 340px);
    margin-top: 12px;
}

/* Cara trasera: resultado */
.result-icon {
    width: 56px;
    height: 56px;
    display: grid;
    place-items: center;
    margin-bottom: 6px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    font-size: 1.7rem;
    font-weight: 800;
}

.flipped .result-icon {
    animation: pop 0.45s var(--ease) 0.35s backwards;
}

.result-title {
    margin: 0 0 10px;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.9rem;
}

.result-label {
    margin: 6px 0 2px;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    opacity: 0.8;
}

.result-wrong {
    margin: 0;
    font-size: 1.1rem;
    text-decoration: line-through;
    opacity: 0.85;
}

.result-answer {
    margin: 0;
    padding: 6px 14px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.18);
    font-size: 1.35rem;
    font-weight: 800;
}

.result-answer-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

/* Teclado de acentos bajo la tarjeta: desactivado mientras se ve el resultado */
.practice accent-keys {
    width: min(100%, var(--card-w));
    margin-top: -6px;
}

.flip-card.flipped ~ accent-keys {
    opacity: 0.35;
    pointer-events: none;
}

/* Racha */
.score-stat--streak .score-value {
    color: color-mix(in srgb, #f08c1a 80%, var(--text));
}

.score-stat--streak.is-hot {
    border-color: color-mix(in srgb, #f08c1a 50%, var(--border));
    background: color-mix(in srgb, #f08c1a 10%, var(--surface));
}

.score-stat--streak.is-hot .score-value::after {
    content: " 🔥";
    font-size: 0.85em;
}

.score-stat--streak.bump {
    animation: bump 0.35s var(--ease);
}

@keyframes bump {
    50% { transform: scale(1.15); }
}

/* Botón siguiente: se resalta cuando la tarjeta ya está girada */
.next-btn {
    width: min(100%, var(--card-w));
}

.flip-card.flipped ~ .next-btn {
    background: var(--primary);
    color: var(--primary-contrast);
    border-color: transparent;
    box-shadow: 0 8px 18px -8px color-mix(in srgb, var(--primary) 80%, transparent);
}

.flip-card.flipped ~ .next-btn:hover {
    background: var(--primary-hover);
}

.hint {
    margin: -6px 0 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

@media (hover: none) {
    .hint { display: none; }
}

@media (max-width: 480px) {
    .score {
        gap: 4px;
    }

    .score-stat {
        min-width: 0;
        padding: 5px 8px;
    }

    .score-label {
        font-size: 0.62rem;
        letter-spacing: 0.02em;
    }

    .flip-card {
        height: 360px;
    }

    .flip-card .front,
    .flip-card .back {
        padding: 24px 18px;
    }
}

@keyframes pop {
    from {
        opacity: 0;
        transform: scale(0.4);
    }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    40% { transform: translateY(-8px); }
    70% { transform: translateY(2px); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-8px); }
    40% { transform: translateX(7px); }
    60% { transform: translateX(-5px); }
    80% { transform: translateX(3px); }
}

/* Enlace a la lección de teoría */
.theory-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 999px;
    color: color-mix(in srgb, var(--tone) 72%, var(--text));
    font-weight: 700;
    text-decoration: none;
    transition: background-color 0.2s;
}

.theory-link:hover {
    background: color-mix(in srgb, var(--tone) 10%, transparent);
}

.theory-link svg {
    width: 18px;
    height: 18px;
}