/**
 * Quiz Master – Frontend Styles
 *
 * @package QuizMaster
 */

/* ========== CSS Variables (overridden by PHP inline) ========== */
:root {
    --qm-primary: #006a4e;
    --qm-secondary: #f42a41;
    --qm-accent: #ffffff;
    --qm-bg: #f8f9fa;
    --qm-card: #ffffff;
    --qm-border: #e2e8f0;
    --qm-text: #1a202c;
    --qm-text-light: #718096;
    --qm-radius: 12px;
    --qm-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --qm-shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --qm-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== Container ========== */
.qm-quiz-container {
    max-width: 960px;
    margin: 30px auto;
    font-family: 'Noto Sans', 'Noto Sans Bengali', 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji';
    font-size: 16px;
    color: var(--qm-text);
    line-height: 1.6;
}

/* ========== Header ========== */
.qm-quiz-header {
    text-align: center;
    padding: 32px 24px;
    background: linear-gradient(135deg, var(--qm-primary), #00a878);
    color: var(--qm-accent);
    border-radius: var(--qm-radius) var(--qm-radius) 0 0;
}

.qm-quiz-title {
    font-size: 28px;
    font-weight: 700;
    margin: 0 0 8px;
    color: var(--qm-accent);
}

.qm-quiz-desc {
    opacity: 0.9;
    font-size: 15px;
    margin: 0 0 16px;
}

.qm-quiz-meta {
    display: flex;
    justify-content: center;
    gap: 24px;
    font-size: 14px;
    opacity: 0.9;
}

.qm-meta-icon {
    margin-right: 4px;
}

/* ========== Timer ========== */
.qm-timer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px;
    background: var(--qm-card);
    border-left: 1px solid var(--qm-border);
    border-right: 1px solid var(--qm-border);
    font-size: 20px;
    font-weight: 700;
    color: var(--qm-primary);
}

.qm-timer.qm-timer-warning {
    color: #e67e22;
    animation: qm-pulse 1s ease-in-out infinite;
}

.qm-timer.qm-timer-danger {
    color: var(--qm-secondary);
    animation: qm-pulse 0.5s ease-in-out infinite;
}

@keyframes qm-pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

/* ========== Progress Bar ========== */
.qm-progress-wrapper {
    position: relative;
    height: 6px;
    background: #e2e8f0;
    overflow: hidden;
}

.qm-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--qm-primary), #00c896);
    transition: width 0.4s ease;
    border-radius: 0 3px 3px 0;
}

.qm-progress-text {
    display: block;
    text-align: center;
    font-size: 12px;
    color: var(--qm-text-light);
    padding: 6px 0;
    background: var(--qm-card);
    border-left: 1px solid var(--qm-border);
    border-right: 1px solid var(--qm-border);
}

/* ========== Body Layout ========== */
.qm-quiz-body {
    display: flex;
    background: var(--qm-card);
    border-left: 1px solid var(--qm-border);
    border-right: 1px solid var(--qm-border);
    min-height: 300px;
}

/* ========== Sidebar ========== */
.qm-sidebar {
    width: 72px;
    flex-shrink: 0;
    background: #f7fafc;
    border-right: 1px solid var(--qm-border);
    padding: 16px 0;
    overflow-y: auto;
}

.qm-sidebar-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 0 8px;
}

.qm-nav-num {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--qm-border);
    background: var(--qm-card);
    color: var(--qm-text-light);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--qm-transition);
}

.qm-nav-num:hover {
    border-color: var(--qm-primary);
    color: var(--qm-primary);
    transform: scale(1.1);
}

.qm-nav-num.qm-nav-active {
    background: var(--qm-primary);
    border-color: var(--qm-primary);
    color: var(--qm-accent);
    box-shadow: 0 2px 8px rgba(0, 106, 78, 0.3);
}

.qm-nav-num.qm-nav-answered {
    background: #e6f7ef;
    border-color: var(--qm-primary);
    color: var(--qm-primary);
}

/* ========== Question Area ========== */
.qm-question-area {
    flex: 1;
    padding: 32px;
}

.qm-question-card {
    animation: qm-fadeIn 0.3s ease;
}

@keyframes qm-fadeIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.qm-question-text {
    font-size: 20px;
    font-weight: 600;
    color: var(--qm-text);
    margin: 0 0 24px;
    line-height: 1.5;
}

.qm-question-label {
    font-size: 13px;
    color: var(--qm-text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

/* ========== Options ========== */
.qm-options-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.qm-option {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    background: var(--qm-bg);
    border: 2px solid transparent;
    border-radius: 10px;
    cursor: pointer;
    transition: var(--qm-transition);
    user-select: none;
}

.qm-option:hover {
    background: #edf2f7;
    border-color: var(--qm-primary);
    transform: translateX(4px);
}

.qm-option.qm-option-selected {
    background: #fff9c4;
    border-color: #f9a825;
    box-shadow: 0 2px 8px rgba(249, 168, 37, 0.2);
}

.qm-option-key {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--qm-card);
    border: 2px solid var(--qm-border);
    font-weight: 700;
    font-size: 14px;
    color: var(--qm-text-light);
    flex-shrink: 0;
    transition: var(--qm-transition);
}

.qm-option-selected .qm-option-key {
    background: #f9a825;
    border-color: #f9a825;
    color: #fff;
}

.qm-option-text {
    font-size: 16px;
    color: var(--qm-text);
}

/* ========== Navigation Buttons ========== */
.qm-nav-buttons {
    display: flex;
    align-items: center;
    padding: 20px 32px;
    background: var(--qm-card);
    border: 1px solid var(--qm-border);
    border-top: none;
    border-radius: 0 0 var(--qm-radius) var(--qm-radius);
}

.qm-btn {
    padding: 12px 28px;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--qm-transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.qm-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Previous button – stays left */
.qm-btn-prev {
    background: #e2e8f0;
    color: var(--qm-text);
    order: 1;
    margin-right: auto;
}

.qm-btn-prev:hover:not(:disabled) {
    background: #cbd5e0;
}

/* Clear button – center */
.qm-btn-clear {
    background: var(--qm-secondary);
    color: var(--qm-accent);
    order: 2;
    margin: 0 auto;
}

.qm-btn-clear:hover:not(:disabled) {
    background: #d01e33;
}

/* Next button – right */
.qm-btn-next {
    background: var(--qm-primary);
    color: var(--qm-accent);
    order: 3;
    margin-left: auto;
}

.qm-btn-next:hover:not(:disabled) {
    background: #005540;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 106, 78, 0.3);
}

/* Submit button – right (same position as next) */
.qm-btn-submit {
    background: var(--qm-primary);
    color: var(--qm-accent);
    order: 3;
    margin-left: auto;
}

.qm-btn-submit:hover:not(:disabled) {
    background: #005540;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 106, 78, 0.3);
}

/* ========== Results Screen ========== */
.qm-results-screen {
    background: var(--qm-card);
    border: 1px solid var(--qm-border);
    border-radius: var(--qm-radius);
    padding: 40px;
    text-align: center;
    animation: qm-fadeIn 0.5s ease;
}

.qm-results-icon {
    font-size: 64px;
    margin-bottom: 16px;
}

.qm-results-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--qm-text);
    margin: 0 0 8px;
}

.qm-results-message {
    font-size: 16px;
    color: var(--qm-text-light);
    margin-bottom: 24px;
}

.qm-results-score {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 32px;
}

.qm-score-item {
    text-align: center;
}

.qm-score-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--qm-primary);
}

.qm-score-label {
    font-size: 13px;
    color: var(--qm-text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.qm-results-status {
    display: inline-block;
    padding: 8px 24px;
    border-radius: 24px;
    font-weight: 700;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 24px;
}

.qm-status-passed {
    background: #e6f7ef;
    color: #006a4e;
}

.qm-status-failed {
    background: #fde8eb;
    color: #f42a41;
}

/* ========== Explanation List ========== */
.qm-explanations {
    text-align: left;
    margin-top: 32px;
}

.qm-explanations h3 {
    font-size: 18px;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--qm-primary);
}

.qm-explanation-item {
    padding: 16px;
    margin-bottom: 12px;
    border-radius: 8px;
    border-left: 4px solid;
}

.qm-explanation-correct {
    background: #e6f7ef;
    border-color: var(--qm-primary);
}

.qm-explanation-wrong {
    background: #fde8eb;
    border-color: var(--qm-secondary);
}

.qm-explanation-item .qm-exp-question {
    font-weight: 600;
    margin-bottom: 6px;
}

.qm-explanation-item .qm-exp-answer {
    font-size: 14px;
    color: var(--qm-text-light);
    margin-bottom: 4px;
}

.qm-explanation-item .qm-exp-text {
    font-size: 14px;
    color: var(--qm-text);
    background: rgba(255, 255, 255, 0.7);
    padding: 8px 12px;
    border-radius: 6px;
    margin-top: 8px;
}

/* ========== Leaderboard ========== */
.qm-leaderboard {
    margin-top: 24px;
    background: var(--qm-card);
    border: 1px solid var(--qm-border);
    border-radius: var(--qm-radius);
    overflow: hidden;
}

.qm-leaderboard h3 {
    padding: 16px 20px;
    margin: 0;
    background: linear-gradient(135deg, var(--qm-primary), #00a878);
    color: var(--qm-accent);
    font-size: 16px;
}

.qm-leaderboard-table {
    width: 100%;
    border-collapse: collapse;
}

.qm-leaderboard-table th,
.qm-leaderboard-table td {
    padding: 10px 16px;
    text-align: left;
    font-size: 14px;
}

.qm-leaderboard-table th {
    background: #f7fafc;
    font-weight: 600;
    color: var(--qm-text-light);
}

.qm-leaderboard-table tr:nth-child(even) td {
    background: #f7fafc;
}

.qm-leaderboard-rank {
    font-weight: 700;
    color: var(--qm-primary);
}

/* ========== Error & Notice ========== */
.qm-error {
    color: var(--qm-secondary);
    background: #fde8eb;
    padding: 16px;
    border-radius: 8px;
    text-align: center;
}

.qm-notice {
    background: #fff3cd;
    color: #856404;
    padding: 16px;
    border-radius: 8px;
    text-align: center;
}

/* ========== Loading ========== */
.qm-loading {
    text-align: center;
    padding: 40px;
    color: var(--qm-text-light);
}

.qm-spinner {
    display: inline-block;
    width: 32px;
    height: 32px;
    border: 3px solid var(--qm-border);
    border-top-color: var(--qm-primary);
    border-radius: 50%;
    animation: qm-spin 0.8s linear infinite;
}

@keyframes qm-spin {
    to {
        transform: rotate(360deg);
    }
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
    .qm-quiz-container {
        margin: 16px 12px;
    }

    .qm-quiz-header {
        padding: 24px 16px;
    }

    .qm-quiz-title {
        font-size: 22px;
    }

    .qm-quiz-body {
        flex-direction: column;
    }

    .qm-sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--qm-border);
        padding: 12px 16px;
        overflow-x: auto;
        overflow-y: hidden;
    }

    .qm-sidebar-inner {
        flex-direction: row;
        gap: 8px;
        padding: 0;
    }

    .qm-nav-num {
        width: 36px;
        height: 36px;
        font-size: 13px;
        flex-shrink: 0;
    }

    .qm-question-area {
        padding: 20px 16px;
    }

    .qm-question-text {
        font-size: 17px;
    }

    .qm-option {
        padding: 14px 16px;
    }

    .qm-nav-buttons {
        flex-wrap: wrap;
        gap: 8px;
        padding: 16px;
    }

    .qm-btn {
        flex: 1;
        justify-content: center;
        min-width: calc(50% - 4px);
    }

    .qm-results-score {
        flex-direction: column;
        gap: 16px;
    }

    .qm-results-screen {
        padding: 24px 16px;
    }
}

@media (max-width: 480px) {
    .qm-quiz-meta {
        flex-direction: column;
        gap: 8px;
    }

    .qm-btn {
        padding: 12px 16px;
        font-size: 14px;
        min-width: 100%;
    }
}

/* ========== Print Styles ========== */
@media print {

    .qm-nav-buttons,
    .qm-sidebar,
    .qm-timer,
    .qm-progress-wrapper {
        display: none !important;
    }
}