/* Multiple-Choice (選擇題) Mode Styling */

.multiple-choice-container {
    display: none;
    flex-direction: column;
    width: 100%;
    position: relative;
    opacity: 0;
    animation: fadeIn 0.6s 0.2s ease-out forwards;
    transition: background-color 0.4s ease;
}

/* Timer Display (Solid Conic Gradient Countdown Circle inside card-content) */
.multiple-choice-container .timer-display {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    background-color: transparent;
    border-radius: 50%;
    position: absolute;
    top: 14px;
    left: 14px;
    z-index: 2;
}

.multiple-choice-container .timer-display::before {
    content: '';
    display: block;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: conic-gradient(var(--accent-blue, #0b57d0) var(--progress, 100%), var(--border-primary, #dadce0) 0);
    transition: background-color 0.3s ease;
}

.multiple-choice-container .timer-display.critical::before {
    background: conic-gradient(var(--accent-red, #d93025) var(--progress, 100%), rgba(217, 48, 37, 0.2) 0);
}



/* Card-Content Layout inside Container */
.multiple-choice-container .card-content {
    padding: 24px;
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
}

/* Question layout */
.multiple-choice-container .question-content {
    font-size: 1.15rem;
    line-height: 1.6;
    color: var(--text-primary);
    margin: 0 auto 20px auto;
    font-weight: 400 !important;
    display: flex;
    flex-direction: column;
    max-width: 720px;
    width: 100%;
}

.multiple-choice-container .multi-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--accent-blue);
    background-color: rgba(11, 87, 208, 0.1);
    padding: 2px 8px;
    border-radius: 4px;
    margin-bottom: 8px;
    display: inline-block;
    width: fit-content;
}

.multiple-choice-container .question-text,
.multiple-choice-container .question-text * {
    width: 100%;
    font-weight: 400 !important;
}

/* Options container */
.multiple-choice-container .options {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin: 0 auto 24px auto;
    width: 100%;
    max-width: 720px;
}

/* Option Button - Borderless, clean padding, soft highlight overlays */
.multiple-choice-container .option-button {
    padding: 12px 20px;
    font-size: 1.05rem;
    color: var(--text-primary);
    background-color: transparent;
    border: 1px solid transparent;
    border-radius: 18px;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
    text-align: left;
    outline: none;
    width: 100%;
    box-sizing: border-box;
    font-family: inherit;
    line-height: 1.5;
}

.multiple-choice-container .option-button:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

body.dark-mode .multiple-choice-container .option-button:hover {
    background-color: rgba(255, 255, 255, 0.04);
}

.multiple-choice-container .option-button.selected {
    background-color: #e8f0fe !important;
    color: #1967d2 !important;
}

body.dark-mode .multiple-choice-container .option-button.selected {
    background-color: rgba(11, 87, 208, 0.25) !important;
    color: #a8c7fa !important;
}

.multiple-choice-container .option-button.correct {
    background-color: #ceead6 !important;
    border: 1px solid #188038 !important;
    color: #0d652d !important;
}

body.dark-mode .multiple-choice-container .option-button.correct {
    background-color: rgba(13, 101, 45, 0.25) !important;
    border: 1px solid #81c784 !important;
    color: #81c784 !important;
}

.multiple-choice-container .option-button.incorrect {
    background-color: #fad2cf !important;
    border: 1px solid #d93025 !important;
    color: #a50e0e !important;
}

body.dark-mode .multiple-choice-container .option-button.incorrect {
    background-color: rgba(217, 48, 37, 0.25) !important;
    border: 1px solid #e57373 !important;
    color: #e57373 !important;
}

.multiple-choice-container .option-button.missing {
    background-color: #FFF3CD !important;
    border: 1px solid #FFA500 !important;
    color: #b06000 !important;
}

body.dark-mode .multiple-choice-container .option-button.missing {
    background-color: rgba(255, 165, 0, 0.2) !important;
    border: 1px solid #FFA500 !important;
    color: #ffd8a8 !important;
}

/* Confirm Button styling matching Teah design */
.multiple-choice-container .confirm-button {
    margin-top: 20px;
    padding: 10px 24px;
    font-size: 1rem;
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    border: none;
    border-radius: 100px;
    cursor: pointer;
    align-self: flex-end;
    transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
    background-color: var(--md-sys-color-primary);
    color: var(--md-sys-color-on-primary);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    outline: none;
}

.multiple-choice-container .confirm-button:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(11, 87, 208, 0.3);
}

.multiple-choice-container .confirm-button:active {
    transform: translateY(0);
    box-shadow: none;
}

.multiple-choice-container .confirm-button:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Action Area Bottom Buttons */
.multiple-choice-container .bottom-buttons {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 12px;
    width: 100%;
    max-width: 720px;
    margin-left: auto;
    margin-right: auto;
    box-sizing: border-box;
    gap: 12px;
}

.multiple-choice-container .dont-know-button,
.multiple-choice-container .answer-button,
.multiple-choice-container .next-button,
.multiple-choice-container .i-am-right-btn {
    flex: none !important;
    width: auto !important;
    min-width: 96px;
    max-width: 180px;
    padding: 10px 28px;
    border-radius: 999px;   /* pill shape */
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
    white-space: nowrap;
}

.multiple-choice-container .dont-know-button {
    background-color: var(--md-sys-color-surface-container);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
}

.multiple-choice-container .dont-know-button:hover {
    background-color: var(--bg-secondary);
}

.multiple-choice-container .answer-button,
.multiple-choice-container .next-button {
    background-color: var(--accent-blue);
    color: #FFFFFF;
    margin-left: auto;  /* push to right */
}

.multiple-choice-container .answer-button:hover,
.multiple-choice-container .next-button:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(11, 87, 208, 0.3);
}

.multiple-choice-container .answer-button:active,
.multiple-choice-container .next-button:active {
    transform: translateY(0);
    box-shadow: none;
}

.multiple-choice-container .answer-button:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Explanation Card — clean flashcard-like panel */
.multiple-choice-container .card-answer {
    display: none;
    flex-direction: column;
    gap: 0;
    border-radius: 20px;
    background-color: var(--card-answer-bg);
    border: 1px solid var(--border-primary);
    margin: 20px auto 0 auto;
    width: 100%;
    max-width: 720px;
    box-shadow: 0 2px 8px var(--shadow-color);
    box-sizing: border-box;
}

/* Card body padding */
.multiple-choice-container .card-answer-body {
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.multiple-choice-container #mcExplanationText,
.multiple-choice-container #mcExplanationText * {
    text-align: left !important;
    font-size: 1rem;
    line-height: 1.6;
}

.multiple-choice-container #mcExplanationText p {
    margin: 0;
    text-align: left !important;
}

.multiple-choice-container #mcExplanationText p + p {
    margin-top: 8px;
}

.multiple-choice-container .card-answer-actions {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 10px;
    padding: 10px 18px 14px 18px;
    border-top: none;
}

.multiple-choice-container #mcNextBtn {
    min-width: 88px;
    padding: 9px 24px;
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 600;
    background-color: var(--accent-blue);
    color: #FFFFFF;
    border: none;
    cursor: pointer;
    transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
}

.multiple-choice-container #mcNextBtn:hover {
    filter: brightness(1.1);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(11, 87, 208, 0.3);
}

.multiple-choice-container #mcBackProgressBtnExpl {
    padding: 9px 20px;
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 600;
    background-color: transparent;
    color: var(--accent-blue);
    border: 1px solid var(--accent-blue);
    cursor: pointer;
    transition: all 0.2s;
}

.multiple-choice-container #mcBackProgressBtnExpl:hover {
    background-color: rgba(11, 87, 208, 0.08);
}

/* 我是對的 button — same ghost pill as i-am-right-btn in flashcard */
.multiple-choice-container #mcIAmRightBtn {
    padding: 9px 20px;
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 600;
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
    cursor: pointer;
    transition: all 0.2s;
}

.multiple-choice-container #mcIAmRightBtn:hover {
    background-color: var(--bg-secondary);
}