/* =========================================================
   FTLC Vocab Contrast Engine
   File:
   /assets/engines/vocab-contrast/vocab-contrast.css
   ========================================================= */

.ftlc-vocab-contrast-widget {
    --ftlc-vc-primary: #776BFF;
    --ftlc-vc-primary-hover: #5A4FCF;
    --ftlc-vc-choice-bg: #eef6ff;
    --ftlc-vc-choice-border: #d0e4ff;
    --ftlc-vc-border: #e2e8f0;
    --ftlc-vc-card-bg: #ffffff;
    --ftlc-vc-text-main: #0f172a;
    --ftlc-vc-text-sub: #64748b;
    --ftlc-vc-pinyin-color: #94a3b8;
    --ftlc-vc-error: #ef4444;
    --ftlc-vc-success: #16a34a;

    max-width: 850px;
    margin: 40px auto 50px auto;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--ftlc-vc-text-main);
}

.ftlc-vocab-contrast-widget,
.ftlc-vocab-contrast-widget * {
    box-sizing: border-box;
}

/* Header */

.ftlc-vocab-contrast-widget .ftlc-vc-header {
    margin-bottom: 22px;
}

.ftlc-vocab-contrast-widget .ftlc-vc-label {
    display: inline-flex;
    padding: 5px 12px;
    border-radius: 8px;
    background: #eef2ff;
    color: var(--ftlc-vc-primary);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 1.8px;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.ftlc-vocab-contrast-widget .ftlc-vc-title {
    font-size: 28px;
    font-weight: 900;
    margin: 0 0 8px 0;
    line-height: 1.2;
    color: var(--ftlc-vc-text-main);
}

.ftlc-vocab-contrast-widget .ftlc-vc-subtitle {
    margin: 0;
    color: var(--ftlc-vc-text-sub);
    line-height: 1.6;
    font-size: 15px;
}

/* Progress */

.ftlc-vocab-contrast-widget .ftlc-vc-progress-container {
    width: 100%;
    height: 8px;
    background: #f1f5f9;
    border-radius: 10px;
    margin-bottom: 25px;
    overflow: hidden;
}

.ftlc-vocab-contrast-widget .ftlc-vc-progress-bar {
    width: 0%;
    height: 100%;
    background: var(--ftlc-vc-primary);
    transition: width 0.5s ease-out;
    border-radius: 10px;
}

/* Main card */

.ftlc-vocab-contrast-widget .ftlc-vc-sentence-card {
    background: var(--ftlc-vc-card-bg);
    padding: 40px 50px;
    border-radius: 24px;
    box-shadow: 0 4px 25px rgba(0, 0, 0, 0.04);
    min-height: 480px;
    display: flex;
    flex-direction: column;
    border: 1px solid var(--ftlc-vc-border);
    transition: border-color 0.3s ease;
}

.ftlc-vocab-contrast-widget .ftlc-vc-sentence-card.success-border {
    border: 2px solid #bbf7d0;
}

.ftlc-vocab-contrast-widget .ftlc-vc-hint-label {
    font-size: 13px;
    font-weight: 800;
    color: var(--ftlc-vc-primary);
    text-align: center;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

/* Choices */

.ftlc-vocab-contrast-widget .ftlc-vc-choices-header {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 30px;
    padding-bottom: 25px;
    border-bottom: 1px solid #f1f5f9;
}

.ftlc-vocab-contrast-widget .ftlc-vc-choice {
    appearance: none;
    -webkit-appearance: none;
    background: var(--ftlc-vc-choice-bg) !important;
    border: 1px solid var(--ftlc-vc-choice-border) !important;
    color: var(--ftlc-vc-text-main) !important;
    padding: 12px 20px !important;
    border-radius: 16px !important;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex !important;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 130px;
    box-shadow: none !important;
    outline: none !important;
    line-height: 1.2;
    text-decoration: none !important;
}

.ftlc-vocab-contrast-widget .ftlc-vc-choice:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(119, 107, 255, 0.15) !important;
    border-color: var(--ftlc-vc-primary) !important;
    background: #eef6ff !important;
}

.ftlc-vocab-contrast-widget .ftlc-vc-choice:focus,
.ftlc-vocab-contrast-widget .ftlc-vc-choice:active {
    outline: none !important;
    box-shadow: 0 0 0 3px rgba(119, 107, 255, 0.14) !important;
}

.ftlc-vocab-contrast-widget .ftlc-vc-choice-py {
    font-size: 11px;
    color: var(--ftlc-vc-primary) !important;
    margin-bottom: 4px;
    font-weight: 700;
    letter-spacing: 0.5px;
}

.ftlc-vocab-contrast-widget .ftlc-vc-choice-zh {
    font-size: 20px;
    font-weight: 900;
    color: var(--ftlc-vc-text-main) !important;
}

.ftlc-vocab-contrast-widget .ftlc-vc-choice.wrong {
    background: #fee2e2 !important;
    border-color: #fecaca !important;
    animation: ftlcVcShake 0.4s ease;
}

.ftlc-vocab-contrast-widget .ftlc-vc-choice.wrong .ftlc-vc-choice-zh,
.ftlc-vocab-contrast-widget .ftlc-vc-choice.wrong .ftlc-vc-choice-py {
    color: var(--ftlc-vc-error) !important;
}

.ftlc-vocab-contrast-widget .ftlc-vc-choice.right {
    background: #f0fdf4 !important;
    border-color: #bbf7d0 !important;
}

.ftlc-vocab-contrast-widget .ftlc-vc-choice.right .ftlc-vc-choice-zh,
.ftlc-vocab-contrast-widget .ftlc-vc-choice.right .ftlc-vc-choice-py {
    color: var(--ftlc-vc-success) !important;
}

.ftlc-vocab-contrast-widget .ftlc-vc-choice:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

/* Chinese sentence */

.ftlc-vocab-contrast-widget .ftlc-vc-cn-sentence {
    font-size: 26px;
    font-weight: 600;
    color: var(--ftlc-vc-text-main);
    margin-bottom: 35px;
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    align-items: flex-end;
    gap: 45px 8px;
    line-height: 1.25;
}

/* Audio button */

.ftlc-vocab-contrast-widget .ftlc-vc-audio-btn {
    appearance: none;
    -webkit-appearance: none;
    background: var(--ftlc-vc-choice-bg) !important;
    border: 1px solid var(--ftlc-vc-choice-border) !important;
    color: var(--ftlc-vc-primary) !important;
    border-radius: 50% !important;
    width: 44px !important;
    height: 44px !important;
    min-width: 44px !important;
    min-height: 44px !important;
    padding: 0 !important;
    display: inline-flex !important;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    font-size: 20px;
    margin-right: 15px;
    margin-bottom: 6px;
    transition: all 0.2s ease;
    flex-shrink: 0;
    align-self: flex-end;
    box-shadow: 0 4px 10px rgba(119, 107, 255, 0.1) !important;
    outline: none !important;
}

.ftlc-vocab-contrast-widget .ftlc-vc-audio-btn:hover {
    background: #d0e4ff !important;
    transform: scale(1.08);
}

.ftlc-vocab-contrast-widget .ftlc-vc-audio-btn.playing {
    animation: ftlcVcPulse 1.5s infinite;
    background: var(--ftlc-vc-primary) !important;
    border-color: var(--ftlc-vc-primary) !important;
    color: #ffffff !important;
}

/* Ruby / pinyin */

.ftlc-vocab-contrast-widget .ftlc-vc-word-group {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
}

.ftlc-vocab-contrast-widget .ftlc-vc-word-group rt {
    font-size: 12px;
    font-weight: 500;
    color: var(--ftlc-vc-pinyin-color);
    margin-bottom: 6px;
}

.ftlc-vocab-contrast-widget .ftlc-vc-word-group span {
    color: var(--ftlc-vc-text-main);
}

/* Blank */

.ftlc-vocab-contrast-widget .ftlc-vc-blank-slot {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    min-width: 100px;
    border-bottom: 2px solid #cbd5e1;
    margin: 0 5px;
    height: 38px;
    position: relative;
    vertical-align: bottom;
}

.ftlc-vocab-contrast-widget .ftlc-vc-filled-word {
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.ftlc-vocab-contrast-widget .ftlc-vc-filled-word.active {
    opacity: 1;
    transform: translateY(-8px);
}

.ftlc-vocab-contrast-widget .ftlc-vc-filled-word .py {
    font-size: 12px;
    margin-bottom: 4px;
    font-weight: 600;
    color: var(--ftlc-vc-pinyin-color);
}

.ftlc-vocab-contrast-widget .ftlc-vc-filled-word .zh {
    font-weight: 900;
    font-size: 26px;
    color: var(--ftlc-vc-primary);
}

/* Explanation */

.ftlc-vocab-contrast-widget .ftlc-vc-explanation-box {
    margin-bottom: 25px;
    padding: 18px 22px;
    border-radius: 16px;
    background: #f8fbff;
    border: 1px solid #e0e7ff;
    font-size: 14px;
    line-height: 1.7;
    display: none;
    animation: ftlcVcFadeIn 0.3s ease;
}

.ftlc-vocab-contrast-widget .ftlc-vc-explanation-box.visible {
    display: block;
}

.ftlc-vocab-contrast-widget .ftlc-vc-status-badge {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 6px;
    font-weight: 800;
    font-size: 11px;
    margin-bottom: 12px;
    text-transform: uppercase;
    background: #fee2e2;
    color: #ef4444;
    border: 1px solid #fecaca;
}

.ftlc-vocab-contrast-widget .ftlc-vc-exp-section {
    margin-bottom: 12px;
}

.ftlc-vocab-contrast-widget .ftlc-vc-exp-title {
    font-weight: 800;
    color: var(--ftlc-vc-text-main);
    display: block;
    margin-bottom: 4px;
}

.ftlc-vocab-contrast-widget .ftlc-vc-exp-content {
    color: var(--ftlc-vc-text-sub);
    display: block;
}

.ftlc-vocab-contrast-widget .ftlc-vc-exp-example {
    color: var(--ftlc-vc-primary);
    font-weight: 600;
    border-left: 3px solid #ddd;
    padding-left: 10px;
    margin-top: 6px;
    font-style: italic;
    background: rgba(0, 0, 0, 0.02);
    padding: 6px 12px;
    border-radius: 4px;
}

/* English sentence */

.ftlc-vocab-contrast-widget .ftlc-vc-en-sentence {
    font-size: 15px;
    color: var(--ftlc-vc-text-sub);
    line-height: 1.6;
    padding-top: 25px;
    border-top: 1px dashed var(--ftlc-vc-border);
    font-weight: 500;
}

/* Controls */

.ftlc-vocab-contrast-widget .ftlc-vc-controls {
    margin-top: 30px;
    display: flex;
    gap: 15px;
}

.ftlc-vocab-contrast-widget .ftlc-vc-btn {
    appearance: none;
    -webkit-appearance: none;
    padding: 16px 30px !important;
    font-size: 14px !important;
    border-radius: 12px !important;
    border: none;
    cursor: pointer;
    transition: 0.2s;
    font-weight: 800 !important;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: none !important;
    outline: none !important;
}

.ftlc-vocab-contrast-widget .ftlc-vc-btn-primary {
    background: var(--ftlc-vc-primary) !important;
    color: #ffffff !important;
    box-shadow: 0 6px 15px rgba(119, 107, 255, 0.25) !important;
    flex: 1;
}

.ftlc-vocab-contrast-widget .ftlc-vc-btn-primary:hover:not(:disabled) {
    background: var(--ftlc-vc-primary-hover) !important;
}

.ftlc-vocab-contrast-widget .ftlc-vc-btn-secondary {
    background: #ffffff !important;
    color: var(--ftlc-vc-text-sub) !important;
    border: 1px solid var(--ftlc-vc-border) !important;
}

.ftlc-vocab-contrast-widget .ftlc-vc-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Final screen */

.ftlc-vocab-contrast-widget .ftlc-vc-final-screen {
    text-align: center;
    padding: 40px 20px;
    justify-content: center;
}

.ftlc-vocab-contrast-widget .ftlc-vc-final-icon {
    font-size: 64px;
    margin-bottom: 15px;
}

.ftlc-vocab-contrast-widget .ftlc-vc-final-title {
    font-size: 30px;
    font-weight: 900;
    color: var(--ftlc-vc-text-main);
    margin-bottom: 10px;
}

.ftlc-vocab-contrast-widget .ftlc-vc-action-next {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 18px 36px;
    border-radius: 50px;
    font-weight: 800;
    color: #ffffff !important;
    background: var(--ftlc-vc-primary);
    text-decoration: none !important;
    box-shadow: 0 8px 20px rgba(119, 107, 255, 0.3);
}

/* Animations */

@keyframes ftlcVcShake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-6px); }
    40%, 80% { transform: translateX(6px); }
}

@keyframes ftlcVcFadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes ftlcVcPulse {
    0% { box-shadow: 0 0 0 0 rgba(119, 107, 255, 0.5); }
    70% { box-shadow: 0 0 0 12px rgba(119, 107, 255, 0); }
    100% { box-shadow: 0 0 0 0 rgba(119, 107, 255, 0); }
}

/* Mobile */

@media (max-width: 768px) {
    .ftlc-vocab-contrast-widget {
        margin: 28px auto 40px auto;
    }

    .ftlc-vocab-contrast-widget .ftlc-vc-sentence-card {
        padding: 30px 20px;
        border-radius: 20px;
    }

    .ftlc-vocab-contrast-widget .ftlc-vc-choices-header {
        flex-direction: column;
    }

    .ftlc-vocab-contrast-widget .ftlc-vc-choice {
        width: 100%;
    }

    .ftlc-vocab-contrast-widget .ftlc-vc-cn-sentence {
        font-size: 22px;
        gap: 38px 7px;
    }

    .ftlc-vocab-contrast-widget .ftlc-vc-audio-btn {
        width: 38px !important;
        height: 38px !important;
        min-width: 38px !important;
        min-height: 38px !important;
        font-size: 18px;
        margin-bottom: 4px;
    }

    .ftlc-vocab-contrast-widget .ftlc-vc-controls {
        flex-direction: column;
    }
}