/* 
   Meu Certame Design System (Nubank Identity Inspired)
   Pure Vanilla CSS
*/

/* 1. Global Reset & Theme Variables */
:root {
    /* Colors (Light Mode) */
    --primary: #820ad1;
    --primary-dark: #6708a6;
    --primary-light: #f3e8fd;
    --primary-glow: rgba(130, 10, 209, 0.08);
    --background: #f4f4f7;
    --surface: #ffffff;
    --surface-card: #ffffff;
    --border-color: #e2e2e6;
    --text-main: #111112;
    --text-muted: #76767e;
    --success: #248a3d;
    --success-light: #e6f7ed;
    --error: #ca2121;
    --error-light: #fdf0f0;
    --warning: #f1a80a;
    --warning-light: #fffbeb;
    
    /* Font sizing scaling variables */
    --font-scale: 1rem;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    
    /* UI Sizing */
    --border-radius-lg: 16px;
    --border-radius-md: 12px;
    --border-radius-sm: 8px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 24px rgba(130, 10, 209, 0.04);
    --shadow-lg: 0 12px 32px rgba(130, 10, 209, 0.08);
    
    --transition-speed: 0.25s;
}

[data-theme="dark"] {
    /* Colors (Dark Mode) */
    --background: #0c0812;
    --surface: #171120;
    --surface-card: #20182b;
    --border-color: #2e233d;
    --text-main: #f5f5fa;
    --text-muted: #a6a6b0;
    --primary-light: #2c1240;
    --primary-glow: rgba(130, 10, 209, 0.25);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    background-color: var(--background);
    color: var(--text-main);
    line-height: 1.5;
    transition: background-color var(--transition-speed), color var(--transition-speed);
    overflow-x: hidden;
}

/* 2. Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--background);
}
::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--border-radius-sm);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* 3. Header & Navbar */
.header {
    background-color: var(--surface);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-icon {
    color: var(--primary);
    font-size: 28px;
}

.logo-text {
    font-size: 22px;
    font-weight: 800;
    color: var(--text-main);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.logo-text span {
    color: var(--primary);
    font-weight: 500;
}

.nav-bar {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    position: relative;
    padding: 8px 0;
    transition: color var(--transition-speed);
}

.nav-link:hover, .nav-link.active {
    color: var(--primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary);
    transition: width var(--transition-speed);
    border-radius: 9999px;
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

.special-link {
    display: flex;
    align-items: center;
    gap: 6px;
}

.badge-new {
    background-color: var(--primary-light);
    color: var(--primary);
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn-text {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: color var(--transition-speed);
}

.btn-text:hover {
    color: var(--primary-dark);
}

.btn-primary {
    background-color: var(--primary);
    color: #ffffff;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    padding: 10px 24px;
    border-radius: 9999px;
    transition: background-color var(--transition-speed), transform var(--transition-speed);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
}

/* 4. Layout Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 24px 80px 24px;
}

/* Breadcrumbs */
.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    margin-bottom: 24px;
}

.breadcrumbs a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color var(--transition-speed);
}

.breadcrumbs a:hover {
    color: var(--primary);
}

.breadcrumbs .separator {
    color: var(--border-color);
}

.breadcrumbs .current {
    color: var(--text-main);
    font-weight: 500;
}

/* Page Title */
.page-title {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 28px;
    letter-spacing: -0.5px;
}

.page-title span {
    color: var(--primary);
}

/* 5. Cards & Form Controls */
.card {
    background-color: var(--surface);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    padding: 32px;
    margin-bottom: 32px;
    transition: background-color var(--transition-speed), border-color var(--transition-speed), box-shadow var(--transition-speed);
}

.filter-card {
    border-left: 5px solid var(--primary);
}

.filter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

/* Form Grouping */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
}

.form-group select,
.form-group input {
    width: 100%;
    height: 48px;
    padding: 0 16px;
    border-radius: var(--border-radius-md);
    border: 1px solid var(--border-color);
    background-color: var(--surface);
    color: var(--text-main);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 500;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed), background-color var(--transition-speed);
    outline: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

/* Custom Dropdown Arrow */
.form-group select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' height='24' viewBox='0 -960 960 960' width='24' fill='%2376767e'%3E%3Cpath d='M480-344 240-584h480L480-344Z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 18px;
    padding-right: 36px;
}

.form-group select:disabled {
    background-color: var(--background);
    color: var(--text-muted);
    cursor: not-allowed;
    opacity: 0.7;
}

.form-group select:focus,
.form-group input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-glow);
}

.search-group {
    grid-column: span 1;
}

@media (min-width: 768px) {
    .search-group {
        grid-column: span 2;
    }
}

@media (min-width: 1100px) {
    .filter-grid {
        grid-template-columns: 1fr 1fr 1fr 2fr;
    }
}

.input-icon-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon-wrapper input {
    padding-right: 48px;
}

.input-icon {
    position: absolute;
    right: 16px;
    color: var(--text-muted);
    pointer-events: none;
    font-size: 20px;
}

/* Advanced toggler */
.advanced-toggle-area {
    margin-bottom: 24px;
    display: flex;
    justify-content: flex-end;
}

.btn-link {
    background: none;
    border: none;
    color: var(--primary);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 12px;
    border-radius: var(--border-radius-sm);
    transition: background-color var(--transition-speed);
}

.btn-link:hover {
    background-color: var(--primary-light);
}

.btn-link .icon {
    font-size: 18px;
    transition: transform var(--transition-speed);
}

.btn-link.active .icon {
    transform: rotate(180deg);
}

.advanced-filters-panel {
    border-top: 1px dashed var(--border-color);
    padding-top: 24px;
    margin-bottom: 24px;
    animation: slideDown 0.3s ease-out;
}

.hidden {
    display: none !important;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Checkbox group rows */
.checkbox-filters-row {
    display: flex;
    flex-wrap: wrap;
    gap: 32px;
    padding: 24px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 24px;
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.checkbox-group-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.checkboxes {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    user-select: none;
}

.checkbox-label input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.checkbox-label input:focus + .custom-checkbox {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.custom-checkbox {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    position: relative;
    background-color: var(--surface);
    transition: border-color var(--transition-speed), background-color var(--transition-speed);
}

.checkbox-label:hover .custom-checkbox {
    border-color: var(--primary);
}

.checkbox-label input:checked + .custom-checkbox {
    background-color: var(--primary);
    border-color: var(--primary);
}

.checkbox-label input:checked + .custom-checkbox::after {
    content: "check";
    font-family: "Material Symbols Rounded";
    position: absolute;
    color: #ffffff;
    font-size: 14px;
    font-weight: 800;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

/* Filter actions bar */
.filter-actions-bar {
    display: flex;
    flex-direction: column;
    gap: 16px;
    justify-content: space-between;
    align-items: flex-start;
}

@media (min-width: 768px) {
    .filter-actions-bar {
        flex-direction: row;
        align-items: center;
    }
}

.active-filters-info {
    font-size: 13px;
    color: var(--text-muted);
}

.active-filters-info .label {
    font-weight: 700;
    color: var(--text-main);
    margin-right: 6px;
}

.filters-list-text {
    font-style: italic;
}

.action-buttons {
    display: flex;
    gap: 12px;
    width: 100%;
    justify-content: flex-end;
}

@media (max-width: 480px) {
    .action-buttons {
        flex-direction: column;
    }
}

.btn-primary-action {
    background-color: var(--primary);
    color: #ffffff;
    border: none;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 14px;
    height: 44px;
    padding: 0 24px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background-color var(--transition-speed), transform var(--transition-speed);
    box-shadow: var(--shadow-sm);
}

.btn-primary-action:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-outline-action {
    background-color: var(--surface);
    color: var(--primary);
    border: 1px solid var(--primary);
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 14px;
    height: 44px;
    padding: 0 20px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background-color var(--transition-speed), border-color var(--transition-speed), color var(--transition-speed);
}

.btn-outline-action:hover {
    background-color: var(--primary-light);
}

/* 6. Stats & Toolbar Area */
.results-meta-bar {
    display: flex;
    flex-direction: column;
    gap: 16px;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 24px;
    padding: 0 4px;
}

@media (min-width: 992px) {
    .results-meta-bar {
        flex-direction: row;
        align-items: center;
    }
}

.results-count {
    font-size: 15px;
    color: var(--text-muted);
}

.results-count strong {
    color: var(--primary);
    font-weight: 700;
}

.quick-toolbar {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    background-color: var(--surface);
    padding: 6px 12px;
    border-radius: 9999px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.toolbar-btn {
    background: none;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.toolbar-btn:hover {
    background-color: var(--primary-light);
    color: var(--primary);
}

.toolbar-btn span {
    font-size: 20px;
}

.divider {
    width: 1px;
    height: 20px;
    background-color: var(--border-color);
}

.text-resize-group {
    display: flex;
    gap: 4px;
}

.text-size-btn {
    font-size: 13px !important;
    font-weight: 700;
}

.toolbar-select-group {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 600;
}

.toolbar-select-group select {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background-color: var(--surface);
    color: var(--text-main);
    padding: 4px 28px 4px 8px;
    font-weight: 600;
    font-size: 13px;
    height: 28px;
    outline: none;
    cursor: pointer;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' height='20' viewBox='0 -960 960 960' width='20' fill='%2376767e'%3E%3Cpath d='M480-344 240-584h480L480-344Z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 6px center;
    background-size: 14px;
}

.toolbar-select-group select:focus {
    border-color: var(--primary);
}

/* 7. Questions List */
.questions-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.loading-state, .empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px;
    background-color: var(--surface);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    text-align: center;
    gap: 16px;
    color: var(--text-muted);
}

.spinner {
    font-family: 'Material Symbols Rounded' !important;
    font-weight: normal;
    font-style: normal;
    font-size: 32px;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--primary) !important;
    animation: hourglass-flip 1.8s ease-in-out infinite !important;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-feature-settings: 'liga';
    border: none !important;
    background: none !important;
    border-radius: 0 !important;
    width: auto !important;
    height: auto !important;
    box-shadow: none !important;
}

.spinner::before {
    content: 'hourglass' !important;
}

@keyframes hourglass-flip {
    0% { transform: rotate(0deg); }
    15% { transform: rotate(0deg); }
    50% { transform: rotate(180deg); }
    65% { transform: rotate(180deg); }
    100% { transform: rotate(360deg); }
}

.loading-state p,
.modern-loading-text {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    margin: 12px 0 0 0;
    animation: text-pulse 1.8s ease-in-out infinite;
}

@keyframes text-pulse {
    0% { opacity: 0.6; }
    50% { opacity: 1; }
    100% { opacity: 0.6; }
}

.question-card {
    box-shadow: var(--shadow-sm);
    font-size: var(--font-scale);
    position: relative;
    padding-right: 72px;
}

.question-card:hover {
    box-shadow: var(--shadow-md);
}

.question-footer {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.btn-question-hint {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 1px solid rgba(241, 168, 10, .4);
    border-radius: var(--border-radius-sm);
    background: rgba(241, 168, 10, .08);
    color: #c27803;
    font: inherit;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.btn-question-hint:hover { background: rgba(241, 168, 10, .15); }
.btn-question-hint .material-symbols-rounded { color: #f1a80a; font-size: 18px; }
.question-hint { margin-top: 12px; }
.question-hint[hidden] { display: none; }
.question-hint-content {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    border-left: 4px solid var(--primary);
    border-radius: var(--border-radius-md);
    background: var(--primary-light);
    box-shadow: var(--shadow-sm);
    text-align: left;
}
.question-hint-icon {
    width: 32px;
    height: 32px;
    flex: 0 0 32px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
}
.question-hint-icon .material-symbols-rounded { font-size: 18px; }
.question-hint-title {
    display: block;
    color: var(--primary-dark);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .5px;
    text-transform: uppercase;
}
.question-hint p { margin: 4px 0 0; color: var(--text-main); font-size: 13px; font-weight: 500; line-height: 1.5; }
.immersive-hint-footer { margin-top: 12px; }

.question-proof-link {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    background: transparent;
    border: 1px solid transparent;
    border-radius: 50%;
    text-decoration: none;
    transition: background-color var(--transition-speed), border-color var(--transition-speed), transform var(--transition-speed);
}

.question-proof-link .material-symbols-rounded { font-size: 22px; }

.question-proof-link:hover,
.question-proof-link:focus-visible {
    background: var(--primary-light);
    border-color: var(--primary);
    transform: translateY(-1px);
    outline: none;
}

/* Metadata Bar */
.question-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
    max-height: 28px;
    overflow: hidden;
}

.meta-badge {
    background-color: var(--primary-light);
    color: var(--primary);
    font-size: 0.7em;
    font-weight: 700;
    padding: 0.35em 0.85em;
    border-radius: var(--border-radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    transition: background-color var(--transition-speed);
}

.meta-badge.year {
    background-color: var(--background);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

.meta-filter-link,
.meta-filter-link:link,
.meta-filter-link:visited,
.meta-filter-link:hover,
.meta-filter-link:active,
.meta-filter-link:focus-visible {
    text-decoration: none !important;
    cursor: pointer;
}

.meta-filter-link:hover,
.meta-filter-link:focus-visible {
    background-color: var(--primary);
    border-color: var(--primary);
    color: #fff;
    transform: translateY(-1px);
    outline: none;
}

.meta-filter-link.year:not(.selected-filter) {
    background-color: var(--primary-light);
    color: var(--primary);
    border-color: transparent;
}

.meta-filter-link.year:not(.selected-filter):hover,
.meta-filter-link.year:not(.selected-filter):focus-visible {
    background-color: var(--primary);
    border-color: var(--primary);
    color: #fff;
    transform: translateY(-1px);
}

.meta-filter-link.selected-filter,
.meta-filter-link.selected-filter:hover,
.meta-filter-link.selected-filter:focus-visible {
    background-color: var(--background);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    transform: none;
}

.question-id {
    font-size: 0.75em;
    font-weight: 700;
    color: var(--text-muted);
    margin-bottom: 0.75em;
    display: inline-block;
}

/* Enunciado text */
.question-enunciado {
    font-size: 0.95em;
    color: var(--text-main);
    line-height: 1.6;
    margin-bottom: 1.5em;
    font-weight: 400;
    white-space: pre-wrap; /* Preserve spacing */
}

/* Alternatives List */
.alternatives-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.alternative-item {
    display: flex;
    align-items: flex-start;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 16px 20px;
    background-color: var(--surface);
    cursor: pointer;
    transition: border-color var(--transition-speed), background-color var(--transition-speed), transform var(--transition-speed);
    gap: 16px;
    user-select: none;
}

.alternative-item:hover {
    border-color: var(--primary);
    background-color: var(--primary-glow);
    transform: translateX(4px);
}

.alternative-item.selected {
    border-color: var(--primary);
    background-color: var(--primary-light);
    box-shadow: 0 0 0 2px var(--primary);
}

.alternative-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.75em;
    height: 1.75em;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    font-weight: 700;
    font-size: 0.85em;
    color: var(--text-muted);
    flex-shrink: 0;
    background-color: var(--surface);
    transition: border-color var(--transition-speed), background-color var(--transition-speed), color var(--transition-speed);
}

.alternative-item:hover .alternative-badge {
    border-color: var(--primary);
    color: var(--primary);
}

.alternative-item.selected .alternative-badge {
    background-color: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
}

.alternative-text {
    font-size: 0.9em;
    color: var(--text-main);
    padding-top: 0.1em;
    line-height: 1.5;
}

/* Right/Wrong Answering States */
.alternative-item.correct {
    border-color: var(--success) !important;
    background-color: var(--success-light) !important;
    box-shadow: 0 0 0 2px var(--success) !important;
}

.alternative-item.correct .alternative-badge {
    background-color: var(--success) !important;
    border-color: var(--success) !important;
    color: #ffffff !important;
}

.alternative-item.incorrect {
    border-color: var(--error) !important;
    background-color: var(--error-light) !important;
    box-shadow: 0 0 0 2px var(--error) !important;
}

.alternative-item.incorrect .alternative-badge {
    background-color: var(--error) !important;
    border-color: var(--error) !important;
    color: #ffffff !important;
}

/* Question Action Footer */
.question-footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    align-items: center;
    gap: 16px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.footer-left-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.btn-outline-question {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 0.8em;
    font-weight: 600;
    height: 2.7em;
    padding: 0 1.2em;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.4em;
    transition: background-color var(--transition-speed), border-color var(--transition-speed), color var(--transition-speed);
}

.btn-outline-question:hover {
    background-color: var(--primary-glow);
    border-color: var(--primary);
    color: var(--primary);
}

.btn-outline-question.active {
    background-color: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
}

.btn-outline-question .icon {
    font-size: 1.3em;
}

.btn-submit-answer {
    background-color: var(--primary);
    color: #ffffff;
    border: none;
    font-family: var(--font-sans);
    font-size: 0.85em;
    font-weight: 700;
    height: 2.8em;
    padding: 0 2em;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.5em;
    transition: background-color var(--transition-speed), transform var(--transition-speed), opacity var(--transition-speed);
    box-shadow: var(--shadow-sm);
}

.btn-submit-answer:hover:not(:disabled) {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
}

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

/* Collapsible Content Panels */
.question-panel {
    margin-top: 1.25em;
    padding: 1.25em;
    border-radius: var(--border-radius-md);
    animation: slideDown var(--transition-speed) ease-out;
}

.panel-gabarito {
    background-color: var(--success-light);
    border-left: 4px solid var(--success);
    color: var(--success);
}

[data-theme="dark"] .panel-gabarito {
    background-color: var(--primary-light); /* Fallback dark visual */
    color: #8ce6a6;
    border-left-color: var(--success);
}

.panel-gabarito h4 {
    margin-bottom: 0.5em;
    font-size: 0.9em;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.4em;
}

.panel-gabarito p {
    font-size: 0.9em;
    font-weight: 500;
}

/* Comments Section style */
.panel-comments {
    background-color: var(--background);
    border: 1px solid var(--border-color);
}

.panel-comments h4 {
    font-size: 0.95em;
    font-weight: 700;
    margin-bottom: 1em;
    color: var(--text-main);
}

.comments-list {
    display: flex;
    flex-direction: column;
    gap: 1em;
}

.comment-item {
    display: flex;
    gap: 0.75em;
    background-color: var(--surface);
    padding: 1em;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}

.comment-avatar {
    width: 2.25em;
    height: 2.25em;
    border-radius: 50%;
    background-color: var(--primary-light);
    color: var(--primary);
    font-weight: 700;
    font-size: 0.85em;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.comment-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.comment-author-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.comment-author {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-main);
}

.comment-date {
    font-size: 11px;
    color: var(--text-muted);
}

.comment-text {
    font-size: calc(var(--font-scale) * 0.81);
    color: var(--text-main);
    line-height: 1.5;
    white-space: pre-wrap;
}

.no-comments-text {
    font-size: 13px;
    color: var(--text-muted);
    font-style: italic;
    text-align: center;
    padding: 12px;
}

/* Answer feedback message bubble */
.answer-feedback {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    border-radius: var(--border-radius-sm);
    font-size: 14px;
    font-weight: 600;
    margin-top: 20px;
    animation: popIn 0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.feedback-success {
    background-color: var(--success-light);
    color: var(--success);
    border: 1px solid var(--success);
}

.feedback-error {
    background-color: var(--error-light);
    color: var(--error);
    border: 1px solid var(--error);
}

@keyframes popIn {
    0% { transform: scale(0.9); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

/* 8. Pagination */
.pagination-bar {
    display: flex;
    justify-content: center;
    margin-top: 40px;
}

.pagination-controls {
    display: flex;
    align-items: center;
    gap: 6px;
}

.page-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    background-color: var(--surface);
    color: var(--text-main);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-speed), border-color var(--transition-speed), color var(--transition-speed);
}

.page-btn:hover:not(:disabled) {
    border-color: var(--primary);
    color: var(--primary);
    background-color: var(--primary-glow);
}

.page-btn.active {
    background-color: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
}

.page-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.page-btn span {
    font-size: 20px;
}

/* 9. Footer */
.footer {
    background-color: var(--surface);
    border-top: 1px solid var(--border-color);
    padding: 32px 0;
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

/* 10. Print Mode Layout Styles */
@media print {
    .header, .nav-bar, .header-actions, .filter-card, .results-meta-bar, .pagination-bar, .footer, .footer-left-buttons, .btn-submit-answer {
        display: none !important;
    }
    
    body {
        background-color: #ffffff !important;
        color: #000000 !important;
    }
    
    .container {
        padding: 0 !important;
        max-width: 100% !important;
    }
    
    .card {
        border: none !important;
        box-shadow: none !important;
        padding: 12px 0 !important;
        margin-bottom: 24px !important;
        border-bottom: 1px solid #ccc !important;
        page-break-inside: avoid;
    }
    
    .alternative-item {
        border: 1px solid #ccc !important;
        background-color: #fff !important;
        transform: none !important;
        box-shadow: none !important;
    }
    
    .alternative-badge {
        border-color: #333 !important;
        color: #000 !important;
    }
}

/* Associated Text block styles */
.question-texto-associado {
    font-size: 0.92em;
    color: var(--text-main);
    line-height: 1.6;
    margin-bottom: 1.5em;
    padding: 16px;
    background-color: var(--background);
    border-left: 4px solid var(--primary);
    border-radius: var(--border-radius-sm);
}

.texto-associado-title {
    font-weight: 600;
    font-size: 0.82em;
    text-transform: uppercase;
    color: var(--primary);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.texto-associado-title span {
    font-size: 18px;
}

.texto-associado-content {
    white-space: pre-wrap;
}

/* Question Images styling */
.question-images {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-top: 16px;
}

.question-image {
    max-width: 100%;
    height: auto;
    width: auto;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}



/* -------------------------------------------------------------
   RESPONSIVE HEADER & MOBILE NAVIGATION (HAMBURGER MENU)
   ------------------------------------------------------------- */

/* Menu Toggle Checkbox Hack */
.menu-toggle-checkbox {
    display: none !important;
}

.menu-toggle-label {
    display: none;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-sm);
    color: var(--text-main);
    transition: background-color var(--transition-speed);
}

.menu-toggle-label:hover {
    background-color: var(--background-alt);
}

.menu-toggle-label span {
    font-size: 28px;
}

/* Tablet & Mobile Screens styling */
@media (max-width: 991px) {
    .menu-toggle-label {
        display: flex; /* Show hamburger button on mobile/tablet */
    }

    .header-container {
        position: relative;
    }

    .nav-bar {
        display: none; /* Hide default menu */
        position: absolute;
        top: 72px; /* standard header height */
        left: 0;
        right: 0;
        background-color: var(--surface);
        border-bottom: 2px solid var(--primary);
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        padding: 8px 24px 20px 24px;
        box-shadow: var(--shadow-lg);
        z-index: 999;
        transition: background-color var(--transition-speed);
    }

    .menu-toggle-checkbox:checked ~ .nav-bar {
        display: flex; /* Show dropdown list when checkbox is checked */
    }

    .nav-link {
        width: 100%;
        padding: 14px 0;
        font-size: 16px;
        border-bottom: 1.5px solid var(--border-color);
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    .nav-link:last-child {
        border-bottom: none;
    }

    .nav-link::after {
        display: none !important; /* Disable hover underline effect on mobile list */
    }

    .badge-new {
        margin-left: 8px;
    }

    .user-greeting {
        font-size: 13px !important;
    }

    /* Shrink logo margin or size on mobile/tablet */
    .logo-text {
        font-size: 20px;
    }
}

/* Very Small Mobile Screens styling */
@media (max-width: 576px) {
    .header-container {
        padding: 0 16px;
    }

    .user-greeting {
        display: none !important; /* Hide "Olá, Daniel" greeting to avoid header congestion */
    }

    .header-actions {
        gap: 8px;
    }

    .header-actions button, 
    .header-actions a {
        padding: 6px 12px !important;
        font-size: 12px !important;
    }
}


/* Text-to-Speech (TTS) Button Styles */
.btn-tts {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    border-radius: var(--border-radius-sm);
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.btn-tts:hover {
    background-color: var(--primary-light);
}

.btn-tts.speaking {
    color: var(--danger);
    background-color: rgba(239, 68, 68, 0.12);
    animation: tts-speaking-pulse 1.5s infinite;
}

@keyframes tts-speaking-pulse {
    0% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.05); }
    100% { opacity: 1; transform: scale(1); }
}

#search-icon {
    pointer-events: auto !important;
}


/* Glassmorphic Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(255, 255, 255, 0.65);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 999999 !important;
    transition: opacity 0.3s ease;
}

[data-theme="dark"] .loading-overlay {
    background-color: rgba(18, 18, 18, 0.65);
}

.loading-overlay[style*="display: block"] {
    display: flex !important;
}

.loading-overlay-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--card-background);
    padding: 40px 60px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    max-width: 90%;
    text-align: center;
    gap: 16px;
    animation: scale-up 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes scale-up {
    0% { transform: scale(0.9); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}


/* Speech-to-Text (STT) Microphone Button Styles */
.btn-stt {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    border-radius: var(--border-radius-sm);
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.btn-stt:hover {
    background-color: var(--primary-light);
}

.btn-stt.listening {
    color: #e74c3c;
    background-color: rgba(231, 76, 60, 0.15);
    animation: stt-listening-pulse 1.2s infinite;
}

@keyframes stt-listening-pulse {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(231, 76, 60, 0.4); }
    70% { transform: scale(1.08); box-shadow: 0 0 0 6px rgba(231, 76, 60, 0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(231, 76, 60, 0); }
}


/* Immersive Mode Styling */
.immersive-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: var(--background);
    color: var(--text-main);
    z-index: 9999999;
    display: none;
    flex-direction: column;
    overflow: hidden;
    animation: fadeIn 0.3s ease;
}

[data-theme="dark"] .immersive-overlay {
    background-color: #121212;
}

.immersive-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 24px;
    border-bottom: 1px solid var(--border-color);
    background: var(--card-background);
}

.immersive-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    font-weight: 800;
    color: var(--primary);
}

.immersive-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-muted);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: #e74c3c;
}

.status-dot.pulsing {
    animation: mic-status-pulse 1.5s infinite;
}

@keyframes mic-status-pulse {
    0% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(231, 76, 60, 0.5); }
    70% { transform: scale(1.1); box-shadow: 0 0 0 5px rgba(231, 76, 60, 0); }
    100% { transform: scale(0.9); box-shadow: 0 0 0 0 rgba(231, 76, 60, 0); }
}

.immersive-close-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    padding: 6px;
    border-radius: 50%;
    transition: background-color var(--transition-speed);
}

.immersive-close-btn:hover {
    background-color: var(--primary-light);
    color: var(--error);
}

.immersive-body-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 40px;
    gap: 24px;
    overflow-y: auto;
}

.immersive-nav-btn {
    background: var(--card-background);
    border: 1px solid var(--border-color);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--primary);
    transition: all var(--transition-speed);
    box-shadow: var(--shadow-md);
    z-index: 10;
    flex-shrink: 0;
}

.immersive-nav-btn:hover {
    background-color: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.immersive-nav-btn span {
    font-size: 36px !important;
}

.immersive-question-container {
    flex: 1;
    max-width: 900px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.immersive-question-container .card {
    width: 100%;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    margin: 0;
}


/* Immersive Legend Bar Styling */
.immersive-legend-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 24px;
    padding: 8px 24px;
    background: var(--card-background);
    border-top: 1px solid var(--border-color);
    font-size: 12.5px;
    color: var(--text-muted);
    flex-wrap: wrap;
}

.immersive-legend-bar strong {
    color: var(--primary);
    font-weight: 700;
}

.immersive-legend-bar span {
    background-color: var(--background);
    padding: 4px 10px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
    font-weight: 600;
}