:root {
    --primary-color: #0d47a1; --secondary-color: #1976d2; --light-bg: #f4f7fc;
    --header-bg: #ffffff; --text-dark: #212529; --text-light: #495057;
    --content-bg: #fff; --border-color: #e0e0e0;
    --success-color: #2e7d32; --warning-color: #ffc107; --danger-color: #c62828;
    --info-color: #0288d1; --neutral-color: #6c757d;
    --skipped-color: #f57c00;
    --font-family: 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
}

body.dark-mode {
    --primary-color: #61dafb;
    --secondary-color: #364fc7;
    --light-bg: #0a192f;
    --header-bg: #112240;
    --content-bg: #112240;
    --border-color: #233554;
    --text-dark: #ccd6f6;
    --text-light: #8892b0;
    --success-color: #40c057;
    --warning-color: #fcc419;
    --danger-color: #fa5252;
    --info-color: #3bc9db;
    --neutral-color: #8892b0;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: var(--font-family);
    background-color: var(--light-bg);
    margin: 0;
    color: var(--text-dark);
    padding-bottom: 80px;
    transition: background-color 0.3s, color 0.3s;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

body.no-scroll {
    overflow: hidden;
}
/* --- Loading Animation --- */
#loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--light-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 20000;
    opacity: .8;
    transition: opacity 0.5s ease;
}
#loading-overlay.hidden {
    opacity: 0;
}
.spinner {
    width: 60px;
    height: 60px;
    border: 6px solid var(--border-color);
    border-top: 6px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}
/* --- End Loading Animation --- */ 

/* Full-width Layout */
.main-container { padding: 20px 15px; }
.content-wrapper { width: 100%; margin: 0 auto; background-color: var(--content-bg); padding: 25px; border-radius: 12px; box-shadow: 0 4px 15px rgba(0,0,0,0.05); transition: background-color 0.3s; }

/* Header and Progress */
.exam-header {
    background-color: var(--header-bg); padding: 10px 20px; display: flex; justify-content: space-between; align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1); position: sticky; top: 0; z-index: 1000;
    height: 65px; transition: background-color 0.3s;
}
.exam-header h1 { margin: 0; font-size: 1.2em; color: var(--primary-color); }
/* CLS Fix: हेडर के उन कंट्रोल्स को डिफ़ॉल्ट रूप से छिपाएँ जो तुरंत नहीं दिखने चाहिए */
.exam-header #timer-display,
.exam-header #pause-btn,
.exam-header #header-lang-switcher,
.exam-header #view-solution-btn,
.exam-header #return-to-results-btn,
.exam-header #view-instruction-btn {
    display: none;
}

/* CLS Fix: जब तक परीक्षा शुरू न हो, तब तक टैब और प्रोग्रेस बार वाले कंटेनर को छिपाएँ */
#sticky-container {
    display: none;
}
/* FOUC Fix: सुनिश्चित करें कि डिफ़ॉल्ट रूप से केवल एक भाषा का निर्देश दिखे */
[data-lang-instruction="hi"] {
    display: none;
}
.header-controls { display: flex; align-items: center; gap: 10px; }
.exam-header #timer-display { font-size: 1.2em; font-weight: 600; color: var(--primary-color); background-color: var(--light-bg); padding: 6px 12px; border-radius: 8px; display: none; }

/* Replace the old .timer-warning CSS with this */
.timer-blinking {
    animation: blinker 1s linear infinite;
}

@keyframes blinker {
    50% {
        opacity: 0.3;
    }
}

.icon-btn, #fullscreen-btn, #pause-btn {
    background-color: var(--light-bg); border: none; cursor: pointer; padding: 5px;
    border-radius: 8px; height: 38px; width: 38px; display: flex; align-items: center; justify-content: center;
}
.icon-btn svg { width: 24px; height: 24px; fill: var(--primary-color); }

#view-solution-btn, #return-to-results-btn {
    background-color: var(--light-bg); border: 1px solid var(--primary-color); color: var(--primary-color);
    padding: 8px 12px; border-radius: 8px; cursor: pointer; font-weight: 600; font-size: 0.9em;
}

#fullscreen-btn svg, #pause-btn svg { width: 24px; height: 24px; fill: var(--primary-color); }
.lang-switcher-dropdown {
    border: 1px solid var(--border-color); padding: 5px 8px; border-radius: 8px; font-weight: 600;
    background-color: var(--light-bg); color: var(--primary-color);
    height: 38px;
}

.dark-mode-toggle { display: flex; align-items: center; gap: 8px; cursor: pointer; }
.dark-mode-toggle .switch { position: relative; display: inline-block; width: 50px; height: 26px; }
.dark-mode-toggle .switch input { opacity: 0; width: 0; height: 0; }
.dark-mode-toggle .slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: #ccc; transition: .4s; border-radius: 26px; }
.dark-mode-toggle .slider:before { position: absolute; content: ""; height: 20px; width: 20px; left: 3px; bottom: 3px; background-color: white; transition: .4s; border-radius: 50%; }
.dark-mode-toggle input:checked + .slider { background-color: var(--secondary-color); }
.dark-mode-toggle input:checked + .slider:before { transform: translateX(24px); }

.reattempt-active .solution-options label { cursor: pointer; }
.reattempt-active .solution-options label:hover { background-color: #e9ecef; }
.mobile-menu-icon { display: none; cursor: pointer; }
.mobile-menu-icon svg { width: 28px; height: 28px; fill: var(--primary-color); }
.mobile-menu-dropdown {
    display: none; position: absolute; top: 65px; right: 20px;
    background-color: var(--header-bg); border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15); z-index: 1001;
    border: 1px solid var(--border-color); padding: 10px;
}
.mobile-menu-dropdown.show { display: block; }
.mobile-menu-item { display: flex; align-items: center; justify-content: space-between; padding: 8px; gap: 15px; }

.sticky-container {
    position: sticky; top: 65px;
    z-index: 999; background-color: var(--header-bg); box-shadow: 0 2px 4px rgba(0,0,0,0.05); display: none;
}
.progress-bar-container { width: 100%; background-color: #e9ecef; }
#progress-bar { width: 0%; height: 6px; background-color: var(--success-color); transition: width 0.5s ease; }

.battery-tabs-wrapper { position: relative; display: flex; align-items: center; }
#battery-tabs-container { display: flex; align-items: center; padding: 10px 0; gap: 8px; flex-grow: 1; overflow-x: hidden; }
.battery-tab {
    color: var(--text-light); font-weight: 600; font-size: 0.9em; transition: all 0.3s ease; text-align: center; cursor: pointer;
    position: relative; padding: 8px 16px; border: 1px solid var(--border-color); border-radius: 8px; white-space: nowrap; background-color: var(--light-bg);
}
.battery-tab.active { color: #fff; background-color: var(--primary-color); border-color: var(--primary-color); }

body.test-in-progress .battery-tab {
    cursor: not-allowed;
    opacity: 0.7;
}
body.test-in-progress .battery-tab.active {
    opacity: 1;
    cursor: default;
    pointer-events: auto;
}

.scroll-arrow {
    display: none; position: absolute; top: 50%; transform: translateY(-50%); z-index: 2; background-color: rgba(255, 255, 255, 0.8);
    border: 1px solid var(--border-color); border-radius: 50%; width: 32px; height: 32px;
    cursor: pointer; font-size: 18px; font-weight: bold; color: var(--primary-color); box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    align-items: center; justify-content: center;
}
body.dark-mode .scroll-arrow { background-color: rgba(40, 40, 40, 0.8); }
.scroll-arrow:hover { background-color: #fff; }
body.dark-mode .scroll-arrow:hover { background-color: #333; }
.scroll-arrow:disabled { opacity: 0.3; cursor: not-allowed; }
#scroll-tabs-left { left: 5px; }
#scroll-tabs-right { right: 5px; }

#tab-tooltip { display: none; position: fixed; background-color: var(--content-bg); padding: 12px 15px; border-radius: 8px; font-size: 0.9em; z-index: 1100; top: 100%; left: 50%; transform: translateX(-50%); white-space: nowrap; box-shadow: 0 4px 12px rgba(0,0,0,0.15); border: 1px solid var(--border-color); text-align: left; margin-top: 8px; }
#tab-tooltip .tooltip-title { font-weight: bold; color: var(--primary-color); margin-bottom: 8px; border-bottom: 1px solid var(--border-color); padding-bottom: 5px;}
.tooltip-item { font-weight: 600; margin-top: 6px; }
.tooltip-item.total { color: var(--neutral-color); }
.tooltip-item.attempted { color: var(--info-color); }
.tooltip-item.skipped { color: var(--skipped-color); }

.fixed-footer { position: fixed; bottom: 0; left: 0; width: 100%; background: rgba(255, 255, 255, 0.95); padding: 15px 4vw; box-shadow: 0 -2px 10px rgba(0,0,0,0.1); z-index: 1000; display: none; justify-content: space-between; align-items: center; gap: 15px; }
body.dark-mode .fixed-footer { background: var(--content-bg); }
#skip-footer { justify-content: flex-end; }
#skip-footer > *:first-child { margin-right: auto; } /* Pushes first button to the left */

.skip-btn, .nav-btn { font-size: 1em; border: none; border-radius: 8px; cursor: pointer; display: none; }
.skip-btn { background-color: var(--secondary-color); color: white; padding: 10px 25px; }
.nav-btn { background-color: var(--success-color); color: white; padding: 10px 28px; }
.nav-btn:disabled { background-color: var(--neutral-color); cursor: not-allowed; }
.nav-btn.secondary { background-color: var(--primary-color); }
#clear-response-btn { background-color: var(--warning-color); color: var(--text-dark); }
#solution-footer .nav-btn { display: block; }
#view-result-final-btn { background-color: var(--primary-color); }

.instruction-lang-control { display: flex; justify-content: flex-end; align-items: center; gap: 10px; }
.instruction-lang-control label { font-weight: 600; }
.initial-settings { background-color: var(--light-bg); border-radius: 8px; padding: 20px 30px; margin-top: 25px; border: 1px solid var(--border-color); }
.initial-settings .setting-item { display: flex; justify-content: space-between; align-items: center; padding-bottom: 20px; margin-bottom: 20px; border-bottom: 1px solid var(--border-color); }
.initial-settings .setting-item strong { font-size: 1.05em; color: var(--text-dark); }
.initial-settings .consent-item { display: flex; align-items: center; justify-content: center; gap: 10px; text-align:left; }
.initial-settings .consent-item input[type="checkbox"] { width: 18px; height: 18px; cursor: pointer; accent-color: var(--primary-color); flex-shrink: 0; }
.initial-settings .consent-item label { cursor: pointer; color: var(--text-dark); line-height: 1.5; }

#test-title-main { display: none !important; }
.question-block { display: flex; flex-wrap: wrap; gap: 20px; align-items: flex-start; border-bottom: 1px solid var(--border-color); padding-bottom: 15px; margin-bottom: 15px; }
.question-block .question-text { flex: 1 1 50%; font-weight: 600; }
.question-block .options-group { flex: 1 1 40%; display: flex; flex-wrap: wrap; gap: 15px; }
.options-group label { display: inline-flex; align-items: center; gap: 8px; }
.question-text img, #phase-content img { cursor: pointer; max-width: 100%; height: auto; }
img[data-no-lightbox] { cursor: default; }

.split-view-container { display: flex; gap: 20px; }
.split-view-static-pane { flex: 1 1 45%; position: sticky; /* top is set by JS */ align-self: flex-start; }
.split-view-static-pane img { max-width: 100%; border-radius: 8px; border: 1px solid var(--border-color); }
.split-view-scroll-pane { flex: 1 1 55%; min-width: 0; }
.question-block .split-view-image-mobile { display: none; max-width: 250px; margin-bottom: 15px; }
.question-block.hidden-question { display: none; }

#solution-nav-header-wrapper { position: relative; display: flex; align-items: center; padding: 0 40px; }
#solution-nav-header-wrapper .scroll-arrow#solution-scroll-left { left: 5px; }
#solution-nav-header-wrapper .scroll-arrow#solution-scroll-right { right: 5px; }

#solution-nav-header {
    flex-grow: 1; display: flex; flex-wrap: nowrap; gap: 10px; padding: 10px 0;
    overflow-x: hidden; -webkit-overflow-scrolling: touch; scrollbar-width: none;
    justify-content: flex-start; align-items: center;
}
#solution-nav-header::-webkit-scrollbar { display: none; }

.solution-nav-sticky-container { position: sticky; top: 65px; z-index: 998; background-color: var(--header-bg); box-shadow: 0 2px 4px rgba(0,0,0,0.05); border-bottom: 1px solid var(--border-color); }
.solution-nav-btn { padding: 10px 18px; border: 1px solid var(--border-color); background-color: var(--light-bg); color: var(--text-dark); cursor: pointer; border-radius: 8px; font-weight: 600; transition: all 0.3s ease; flex-shrink: 0; white-space: nowrap; }
.solution-nav-btn.active { background-color: var(--primary-color); color: white; border-color: var(--primary-color); }
.solution-view-container { display: flex; flex-direction: row; gap: 20px; align-items: flex-start; padding-top: 20px; }
#solution-sidebar { width: 280px; flex-shrink: 0; position: sticky; /* top value set by JS */; overflow-y: auto; padding-right: 15px; }
#solution-main-content { flex-grow: 1; }
.solution-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 5px 10px; font-size: 0.9em; margin-bottom: 15px; background: var(--light-bg); padding: 10px; border-radius: 8px; border: 1px solid var(--border-color); }
.solution-stats p { margin: 0; }
.question-jump-nav { display: flex; flex-wrap: wrap; gap: 8px; }
.jump-btn { width: 40px; height: 40px; border: 1px solid var(--border-color); background: var(--content-bg); border-radius: 8px; cursor: pointer; font-weight: 600; display: flex; align-items: center; justify-content: center; transition: all 0.2s; }
.jump-btn:hover { transform: translateY(-2px); }
.jump-btn.correct { background: var(--success-color); color: white; border-color: var(--success-color); }
.jump-btn.incorrect { background: var(--danger-color); color: white; border-color: var(--danger-color); }
.jump-btn.skipped { background: var(--skipped-color); color: white; border-color: var(--skipped-color); }
.jump-btn.active-q-jump { border: 2px solid var(--info-color); box-shadow: 0 0 8px rgba(2, 136, 209, 0.5); }

.solution-question-block { border: 1px solid var(--border-color); padding: 20px; margin-bottom: 20px; border-radius: 8px; background-color: var(--light-bg); }
.solution-question-block p { margin-top: 0; font-weight: 600; }
.solution-options { display: flex; flex-wrap: wrap; gap: 15px; margin-top: 15px;}
.solution-options label { padding: 8px 12px; border-radius: 5px; font-size: 0.95em; border: 1px solid transparent; }

body:not(.dark-mode) .solution-options .correct-option { background-color: #2e7d3220; border: 1px solid var(--success-color); color: var(--text-dark); }
body:not(.dark-mode) .solution-options .user-selected-wrong { background-color: #c62828cc; border-color: #c62828; color: white; }
body.dark-mode .solution-options .correct-option { background-color: rgba(64, 192, 87, 0.2); border: 1px solid var(--success-color); color: var(--text-dark); }
body.dark-mode .solution-options .user-selected-wrong { background-color: #fa5252; border-color: #fa5252; color: white; }
.solution-options .correct-answer { background-color: var(--success-color) !important; color: white !important; border-color: var(--success-color) !important; }

.reattempt-active .solution-options label { cursor: pointer; }
.reattempt-active .solution-options label:hover { background-color: #e9ecef; }
body.dark-mode .reattempt-active .solution-options label:hover { background-color: #343a40; }

.solution-options label.temp-correct { background-color: var(--success-color) !important; color: white !important; border-color: var(--success-color) !important; }
.solution-options label.temp-wrong { background-color: var(--danger-color) !important; color: white !important; border-color: var(--danger-color) !important; }

.solution-question-explanation { margin-top: 15px; padding: 12px; background-color: rgba(2, 136, 209, 0.1); border-left: 4px solid var(--info-color); font-size: 0.95em; line-height: 1.6; }
.solution-question-explanation strong { color: var(--primary-color); }

.responsive-table-wrapper { overflow-x: auto; margin: 15px 0 30px 0; }
.responsive-table-wrapper h4 {color: var(--primary-color); }
.analysis-table { width: 100%; border-collapse: collapse; font-size: 1em; text-align: center; min-width: 600px; }
.analysis-table th, .analysis-table td { border: 1px solid var(--border-color); padding: 12px; }
.analysis-table thead th { background-color: var(--primary-color); color: white; font-weight: 600; }
.analysis-table tbody tr:nth-child(even) { background-color: var(--light-bg); }
.analysis-table .clickable-row { cursor: pointer; transition: background-color 0.2s; }
.analysis-table .clickable-row:hover { background-color: #e9ecef !important; }
body.dark-mode .analysis-table .clickable-row:hover { background-color: #233554 !important; }
.analysis-table .battery-name-cell { font-weight: 600; color: var(--primary-color); }


.screen { display: none; }
.screen.active { display: block; }
h2 { color: var(--primary-color); text-align: center; margin-bottom: 25px; }

.toast {
    position: fixed;
    bottom: 20px;
    right: 20px;
    transform: none;
    background-color: var(--warning-color);
    color: var(--text-dark);
    padding: 15px 25px;
    border-radius: 8px;
    z-index: 2000;
    opacity: 0;
    transition: opacity 0.5s, bottom 0.5s;
    visibility: hidden;
    font-weight: 600;
}
body.dark-mode .toast { color: #000; }
.toast.show {
    bottom: 40px;
    opacity: 1;
    visibility: visible;
}

.highlight-note { background-color: #fff3cd; color: #664d03; border: 1px solid #ffecb5; padding: 15px; margin-top: 20px; border-radius: 8px; text-align:left; font-weight: 500; }
body.dark-mode .highlight-note { background-color: #364951; color: #e9ecef; border: 1px solid var(--info-color); }

#pause-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.7); display: none; align-items: center; justify-content: center; z-index: 10000; }
.pause-modal { background: var(--content-bg); padding: 30px 40px; border-radius: 12px; text-align: center; box-shadow: 0 5px 20px rgba(0,0,0,0.2); }
#resume-btn { background-color: var(--success-color); color: white; padding: 12px 28px; font-size: 1.1em; border: none; border-radius: 8px; cursor: pointer; }

#resume-prompt-overlay, #view-result-prompt-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.8);
    display: none; align-items: center; justify-content: center; z-index: 10002;
}
.resume-prompt-modal { background: var(--content-bg); padding: 30px 40px; border-radius: 12px; text-align: center; box-shadow: 0 5px 20px rgba(0,0,0,0.2); max-width: 450px; width: 90%; }
.resume-prompt-modal h2 { margin-top: 0; color: var(--primary-color); }
.resume-prompt-actions { margin-top: 25px; display: flex; justify-content: center; flex-wrap: wrap; gap: 15px; }
.resume-prompt-actions button { font-size: 1em; border: none; border-radius: 8px; cursor: pointer; padding: 12px 25px; font-weight: 600; transition: background-color 0.2s; }
#resume-test-btn, #view-previous-result-btn { background-color: var(--success-color); color: white; }
#start-new-test-btn, #start-new-overwrite-btn { background-color: var(--danger-color); color: white; }

.modal-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.6);
    display: none; align-items: center; justify-content: center; z-index: 10005; transition: opacity 0.3s ease;
}
.modal-content {
    background: var(--content-bg); padding: 0; border-radius: 12px; box-shadow: 0 5px 20px rgba(0,0,0,0.25);
    width: 90%; max-width: 600px; animation: slide-down 0.4s ease-out;
    display: flex;
    flex-direction: column;
    max-height: 90vh;
}
@keyframes slide-down { from { transform: translateY(-50px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 15px 25px; border-bottom: 1px solid var(--border-color); }
.modal-header h3 { margin: 0; color: var(--primary-color); font-size: 1.2em; }
.modal-close { background: transparent; border: none; font-size: 2em; font-weight: 300; line-height: 1; cursor: pointer; color: var(--text-light); padding: 0; }
.modal-close:hover { color: var(--danger-color); }
.modal-body {
    padding: 25px; 
    overflow-y: auto;
}
/*submit popup*/
.modal-footer {
    padding: 15px 25px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    background-color: var(--light-bg);
    border-radius: 0 0 12px 12px;
}

.modal-footer .nav-btn {
    display: block; /* Ensure buttons are visible */
    padding: 8px 20px;
    font-size: 0.9em;
}

.stats-modal-body { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }

.stats-modal-body .stat-item {
    display: flex; align-items: center; gap: 15px;
    background: var(--light-bg); border-radius: 8px;
    padding: 12px 15px; border: 1px solid var(--border-color);
    border-left-width: 5px;
}
.stats-modal-body .stat-item svg { width: 28px; height: 28px; flex-shrink: 0; }
.stats-modal-body .stat-item .label-value-group { flex-grow: 1; }
.stats-modal-body .stat-item .label { font-size: 0.9em; color: var(--text-light); margin-bottom: 2px; }
.stats-modal-body .stat-item .value { font-size: 1.3em; font-weight: 600; color: var(--text-dark); }
.stats-modal-body .stat-item.correct { border-left-color: var(--success-color); }
.stats-modal-body .stat-item.correct svg { fill: var(--success-color); }
.stats-modal-body .stat-item.incorrect { border-left-color: var(--danger-color); }
.stats-modal-body .stat-item.incorrect svg { fill: var(--danger-color); }
.stats-modal-body .stat-item.attempted { border-left-color: var(--info-color); }
.stats-modal-body .stat-item.attempted svg { fill: var(--info-color); }
.stats-modal-body .stat-item.skipped { border-left-color: var(--skipped-color); }
.stats-modal-body .stat-item.skipped svg { fill: var(--skipped-color); }
.stats-modal-body .stat-item.total { border-left-color: var(--neutral-color); }
.stats-modal-body .stat-item.total svg { fill: var(--neutral-color); }


.overall-stats-container { display: flex; justify-content: space-around; align-items: center; flex-wrap: wrap; gap: 20px; margin: 30px auto; }
.stat-circle { width: 150px; height: 150px; border-radius: 50%; display: flex; flex-direction: column; align-items: center; justify-content: center; background-color: var(--light-bg); border: 5px solid var(--primary-color); box-shadow: 0 4px 10px rgba(0,0,0,0.1); }
.stat-circle .stat-value { font-size: 2em; font-weight: 700; color: var(--primary-color); }
.stat-circle .stat-label { font-size: 1em; font-weight: 600; color: var(--text-light); }

.graph-container-wrapper { display: flex; flex-wrap: wrap; gap: 2%; margin-top: 40px; }
.graph-container { width: 100%; }
.graph-container h3 { color: var(--secondary-color); text-align: left; margin-top: 30px; margin-bottom: 20px; border-bottom: 1px solid var(--border-color); padding-bottom: 10px; font-size: 1.1em; }
.bar-chart { font-size: 0.9em; margin-bottom: 20px; padding: 0 10px; }
.bar-row { display: flex; align-items: center; margin-bottom: 10px; gap: 10px; }
.bar-label { width: 110px; font-weight: 600; flex-shrink: 0; text-align: right; line-height: 1.2; }
.bar-wrapper { flex-grow: 1; background-color: var(--light-bg); border-radius: 4px; height: 24px; border: 1px solid var(--border-color); }
.bar { height: 100%; line-height: 24px; color: white; text-align: right; padding-right: 8px; border-radius: 3px; white-space: nowrap; overflow: hidden; box-sizing: border-box; font-weight: 600; transition: width 0.8s ease-in-out; }
.bar span { padding-right: 5px; }
.bar.total { background-color: var(--neutral-color); }
.bar.attempted { background-color: var(--info-color); }
.bar.skipped { background-color: var(--skipped-color); }
.bar.correct { background-color: var(--success-color); }
.bar.incorrect { background-color: var(--danger-color); }

.lightbox-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0, 0, 0, 0.85); display: none; align-items: center; justify-content: center; z-index: 10001; padding: 20px; }
.lightbox-content { max-width: 95%; max-height: 95%; object-fit: contain; border-radius: 5px; box-shadow: 0 5px 20px rgba(0,0,0,0.4); }
.lightbox-close { position: absolute; top: 20px; right: 35px; color: #fff; font-size: 40px; font-weight: bold; cursor: pointer; transition: color 0.3s ease; }
.lightbox-close:hover { color: #ccc; }

.solution-view-controls, .reattempt-toggle-container {
    display: flex; justify-content: space-between; align-items: center; padding: 10px 12px;
    background-color: var(--light-bg); border-radius: 8px; margin-bottom: 15px; border: 1px solid var(--border-color);
}
.solution-view-controls span, .reattempt-toggle-container span {
    font-weight: 600; color: var(--primary-color); font-size: 0.95em;
}
.switch { position: relative; display: inline-block; width: 50px; height: 26px; }
.switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: #ccc; transition: .4s; border-radius: 26px; }
.slider:before { position: absolute; content: ""; height: 20px; width: 20px; left: 3px; bottom: 3px; background-color: white; transition: .4s; border-radius: 50%; }
input:checked + .slider { background-color: var(--success-color); }
input:checked + .slider:before { transform: translateX(24px); }
.solution-single-nav { display: flex; justify-content: space-between; align-items: center; margin-top: 20px; }
.solution-single-nav .nav-btn { display: block; }
.solution-single-nav .page-indicator, #solution-footer #solution-page-indicator { font-weight: 600; font-size: 1.1em; }

#solution-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1001;
    transition: opacity 0.3s ease;
}
body.sidebar-open #solution-overlay { display: block; }
#mobile-sidebar-toggle { display: none; }

/* --- MOBILE TEST SIDEBAR --- */
#mobile-test-sidebar { display: none; }
#mobile-test-sidebar-toggle { display: none; }
#mobile-test-sidebar-overlay { display: none; }

/* --- Corrected Menu Styles --- */

/* Style for the DESKTOP User Menu (positions it under the icon) */
.dropdown-menu {
    display: none;
    position: absolute;
    right: 0;
    top: 50px; 
    background-color: var(--content-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    min-width: 200px;
    z-index: 1001;
    padding: 8px 0;
    font-size: 0.95em;
}

/* Style for the MOBILE Three-Dot Menu (positions it in the top-right) */
.mobile-menu-dropdown {
    display: none;
    position: absolute;
    top: 65px;
    right: 20px;
    background-color: var(--header-bg);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 1001;
    border: 1px solid var(--border-color);
    padding: 10px;
}

/* --- User Dropdown Menu Styles --- */
.user-menu-container {
    position: relative;
    display: inline-block;
}

.dropdown-menu {
    display: none; /* Hidden by default */
    position: absolute;
    top: 65px; /* Position it right below the header */
    right:0; /* Align it to the top-right corner */
    background-color: var(--header-bg);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 1001;
    border: 1px solid var(--border-color);
    padding: 10px;
    min-width: 200px; 
}

.dropdown-menu.show {
    display: block; /* Show the menu */
}

.dropdown-header {
    padding: 8px 16px;
    font-weight: 600;
    color: var(--text-light);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 8px;
}

.dropdown-item {
    display: block;
    padding: 10px 16px;
    color: var(--text-dark);
    text-decoration: none;
    cursor: pointer;
}

.dropdown-item:hover {
    background-color: var(--light-bg);
}

.dropdown-divider {
    height: 1px;
    margin: 8px 0;
    overflow: hidden;
    background-color: var(--border-color);
}
/* --- End of User Menu Styles --- */
/* Styling for Change Password Modal */
.input-group { 
    margin-bottom: 15px; 
    text-align: left; 
}
.input-group label { 
    display: block; 
    margin-bottom: 5px; 
    font-weight: 600; 
    color: var(--text-light); 
}
.input-group input { 
    width: 100%; 
    padding: 10px; 
    border: 1px solid var(--border-color); 
    border-radius: 8px; 
    box-sizing: border-box; 
    font-size: 1em;
    background-color: var(--light-bg);
    color: var(--text-dark);
}
.error-message {
    color: var(--danger-color);
    margin-top: 10px;
    font-weight: 600;
    font-size: 0.9em;
    text-align: center;
}
/* --- End of Menu Styles --- */
@media (max-width: 768px) {
    .main-container { padding: 15px 10px; }
    .content-wrapper { padding: 20px 15px; }
    .exam-header h1 { flex-grow: 1; }
    .header-controls { gap: 8px; }


.header-controls #header-lang-switcher,
.header-controls #pause-btn,
.header-controls #fullscreen-btn,
.header-controls .dark-mode-toggle { display: none !important; }

    .mobile-menu-icon { display: block; }

    #battery-tabs-container { justify-content: flex-start; overflow-x: auto; -webkit-overflow-scrolling: touch; -ms-overflow-style: none; scrollbar-width: none; padding-left: 40px; padding-right: 40px; }
    #battery-tabs-container::-webkit-scrollbar { display: none; }
    .battery-tab { flex-shrink: 0; }
    .scroll-arrow { display: flex; }

    .question-block { flex-direction: column; gap: 15px; }
    
    /* FIXED: Conditional vertical options layout for mobile */
    body.one-by-one-active .question-block .options-group {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
        gap: 8px;
    }
    body.one-by-one-active .question-block .options-group label {
        width: 100%;
        padding: 10px;
        border: 1px solid var(--border-color);
        border-radius: 8px;
        background-color: var(--light-bg);
    }
    body.one-by-one-active .question-block .options-group label:has(input:checked) {
        background-color: var(--secondary-color);
        color: white;
        border-color: var(--secondary-color);
    }


    .fixed-footer { padding: 10px 15px; gap: 10px; }
    .skip-btn, .nav-btn { padding: 10px 15px; font-size: 0.9em; }
    
    .stats-modal-body { grid-template-columns: 1fr; }
    .stats-modal-body .stat-item.full-width { grid-column: 1 / 1; }

    /* Split View Mobile */
    .split-view-container { flex-direction: column; }
    .split-view-static-pane { display: none; }
    .question-block .split-view-image-mobile { display: none !important; }
    
    #mobile-split-view-image-container {
        width: 100%;
        margin-bottom: 15px;
        text-align: center;
    }
    #mobile-split-view-image-container img {
        max-width: 100%;
        max-height: 250px;
        border-radius: 8px;
        border: 1px solid var(--border-color);
    }

    /* Solution Page Mobile */
    #mobile-sidebar-toggle {
        display: flex; /* Controlled by JS */
        align-items: center; gap:0;
        position: fixed;
        bottom: 150px;
        right: 0;
        z-index:1002;
        background-color: var(--primary-color);
        color: white;
        border: none;
        border-radius: 8px 0 0 8px;
        padding: 8px 10px;
        cursor: pointer;
        box-shadow: -2px 2px 8px rgba(0,0,0,0.2);
        transition: right 0.4s ease-in-out;
    }
    body.sidebar-open #mobile-sidebar-toggle { right: 280px; }
   
    #solution-nav-header {
        overflow-x: auto; padding: 10px 0;
    }
    #solution-nav-header-wrapper { padding: 0 40px; }
    #solution-nav-header-wrapper .scroll-arrow { display: flex; }
    #solution-nav-header-wrapper .scroll-arrow#solution-scroll-left { left: 5px; }
    #solution-nav-header-wrapper .scroll-arrow#solution-scroll-right { right: 5px; }

    .solution-view-container { flex-direction: column; }
    /* FIXED: Solution sidebar top: 0, height: 100% */
    #solution-sidebar {
        position: fixed;
        top: 0;
        right: -280px;
        width: 280px;
        height: 100%;
        max-height: 100vh;
        z-index: 1002;
        background: var(--content-bg);
        transition: right 0.4s ease-in-out;
        overflow-y: auto;
        padding: 20px;
        box-shadow: -3px 0 15px rgba(0,0,0,0.25);
        border-right: none;
    }
    body.sidebar-open #solution-sidebar { right: 0; }

    .question-jump-nav { max-height: none; }
    .graph-container { width: 100%; }

    /* --- MOBILE TEST SIDEBAR STYLES --- */
    #mobile-test-sidebar {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 0;
        right: -280px;
        width: 280px;
        height: 100%;
        max-height: 100vh;
        background-color: var(--content-bg);
        z-index: 1002;
        transition: right 0.4s ease-in-out;
        padding: 15px;
        box-shadow: -3px 0 15px rgba(0,0,0,0.25);
        overflow-y: auto;
    }

    body.mobile-test-sidebar-open #mobile-test-sidebar {
        right: 0;
    }

    #mobile-test-sidebar-toggle {
        display: none; /* Controlled by JS */
        align-items: center; gap:0;
        position: fixed;
        bottom: 150px;
        right: 0;
        z-index: 1002;
        background-color: var(--secondary-color);
        color: white;
        border: none;
        border-radius: 8px 0 0 8px;
        padding: 8px 10px;
        cursor: pointer;
        box-shadow: -2px 2px 8px rgba(0,0,0,0.2);
        transition: right 0.4s ease-in-out;
    }

    body.mobile-test-sidebar-open #mobile-test-sidebar-toggle {
        right: 280px;
    }

    #mobile-test-sidebar-overlay {
        position: fixed;
        top: 0; left: 0; width: 100%; height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 1001;
    }

    body.mobile-test-sidebar-open #mobile-test-sidebar-overlay {
        display: block;
    }

    .mobile-sidebar-section {
        margin-bottom: 15px;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 15px;
    }
    .mobile-sidebar-section:last-of-type {
        border-bottom: none;
    }
    
    #mobile-test-sidebar .mobile-sidebar-section:last-child {
         margin-top: auto;
         margin-bottom: 0;
         padding-bottom: 0;
         border-bottom: none;
    }


    .mobile-sidebar-section h4 {
        margin: 0 0 12px 0;
        font-size: 1em;
        color: var(--primary-color);
    }

    .mobile-test-stats {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 8px;
        font-size: 0.85em;
    }

    .mobile-test-stats p {
        margin: 0;
        font-weight: 600;
        background: var(--light-bg);
        padding: 5px 8px;
        border-radius: 4px;
    }

    .mobile-test-stats .stat-value {
        color: var(--primary-color);
        float: right;
    }

    .mobile-question-nav {
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
    }

    .mobile-jump-btn {
        width: 36px;
        height: 36px;
        border: 1px solid var(--border-color);
        background: var(--content-bg);
        border-radius: 6px;
        cursor: pointer;
        font-weight: 600;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .mobile-jump-btn.attempted {
        background-color: var(--info-color);
        color: white;
        border-color: var(--info-color);
    }
    .mobile-jump-btn.current {
        border: 2px solid var(--primary-color);
        box-shadow: 0 0 6px var(--primary-color);
        transform: scale(1.1);
    }
    .mobile-jump-btn.unseen {
        background-color: var(--light-bg);
    }


    .mobile-sidebar-toggle-control {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    #mobile-submit-btn {
        width: 100%;
        padding: 12px;
        font-size: 1em;
        background-color: var(--success-color);
        color: white;
        border: none;
        border-radius: 8px;
        cursor: pointer;
    }
}

@media (min-width: 769px) {
    .graph-container { width: 49%; }
}