/* LockTheGame Shared Stylesheet - Premium Dark Theme */

:root {
    --bg-base: #0a0b10;
    --bg-surface: rgba(18, 20, 32, 0.65);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-focus: rgba(52, 168, 83, 0.4);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;

    --accent-primary: #34a853; /* LockTheGame Green */
    --accent-secondary: #4fc46a; /* Bright Green */
    --accent-glow: rgba(52, 168, 83, 0.35);

    --color-success: #10b981;
    --color-success-bg: rgba(16, 185, 129, 0.15);
    --color-danger: #ef4444;
    --color-danger-bg: rgba(239, 68, 68, 0.15);
    --color-warning: #f59e0b;
    
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --shadow-premium: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

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

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    position: relative;
}

/* Background graphics decoration */
.background-decor {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: -1;
    pointer-events: none;
}

.circle {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.25;
}

.circle-1 {
    top: -10%;
    right: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--accent-primary) 0%, transparent 70%);
}

.circle-2 {
    bottom: -10%;
    left: -10%;
    width: 45vw;
    height: 45vw;
    background: radial-gradient(circle, var(--accent-secondary) 0%, transparent 70%);
}

.circle-3 {
    top: 30%;
    left: -10%;
    width: 40vw;
    height: 40vw;
    background: radial-gradient(circle, var(--accent-primary) 0%, transparent 70%);
}

/* Header styling */
header {
    background: rgba(10, 11, 16, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container, .student-header {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo, .student-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon, .student-logo-icon {
    width: 2.5rem;
    height: 2.5rem;
    color: var(--accent-primary);
}

.logo-text h1, .student-logo h2 {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.025em;
    color: var(--text-primary);
}

.logo-text h1 span, .student-logo h2 span {
    color: var(--accent-primary);
}

.logo-text p {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: -3px;
}

/* Connection Badges */
.database-status-badge, .student-status-badge {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.pulse-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    position: relative;
}

.status-connected {
    background-color: var(--color-success);
    box-shadow: 0 0 8px var(--color-success);
}

.status-disconnected {
    background-color: var(--color-danger);
    box-shadow: 0 0 8px var(--color-danger);
}

/* Glassmorphism Cards */
.glass-card {
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 1.25rem;
    box-shadow: var(--shadow-premium);
    overflow: hidden;
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), border-color 0.3s ease;
}

.glass-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
}

/* Containers */
.dashboard-container, .student-container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    width: 100%;
}

/* Master Control Panel */
.master-control-panel {
    padding: 1.5rem 2rem;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
}

.header-info h2 {
    font-size: 1.25rem;
    font-weight: 700;
}

.header-info p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Custom Toggle Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #2e303f;
    transition: .4s;
    border: 1px solid var(--border-color);
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .4s;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

input:checked + .slider {
    background-color: var(--color-danger);
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.4);
}

input:checked + .slider:before {
    transform: translateX(26px);
}

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}

/* Switch Status Banner */
.switch-status-banner {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1.25rem;
    padding: 0.875rem 1.25rem;
    border-radius: 0.75rem;
    background: var(--color-success-bg);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: var(--color-success);
    transition: all 0.3s ease;
}

.switch-status-banner.switch-active {
    background: var(--color-danger-bg);
    border-color: rgba(239, 68, 68, 0.2);
    color: var(--color-danger);
}

.banner-icon {
    width: 1.5rem;
    height: 1.5rem;
    flex-shrink: 0;
}

.banner-text {
    display: flex;
    flex-direction: column;
    font-size: 0.875rem;
}

.banner-text strong {
    font-weight: 600;
}

.banner-text span {
    opacity: 0.85;
}

/* Devices Grid */
.devices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.device-card {
    display: flex;
    flex-direction: column;
}

.device-card-header {
    padding: 1.5rem 1.5rem 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    border-bottom: 1px solid var(--border-color);
}

.device-title-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.device-title-row h3 {
    font-size: 1.125rem;
    font-weight: 700;
}

.status-pill {
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 9999px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.status-pill.online {
    background-color: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-pill.offline {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.device-id-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.device-icon-container {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 0.5rem;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
}

.device-card-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    flex-grow: 1;
}

/* Progress Wheel */
.progress-container {
    display: flex;
    justify-content: center;
    align-items: center;
}

.progress-wheel-wrapper {
    position: relative;
    width: 160px;
    height: 160px;
}

.progress-ring {
    transform: rotate(-90deg);
}

.progress-ring-bar {
    transition: stroke-dashoffset 0.5s ease;
    filter: drop-shadow(0 0 6px var(--accent-primary));
}

.progress-text-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    line-height: 1.1;
}

.time-spent-number {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--text-primary);
}

.time-spent-unit {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.time-spent-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* Status Rows */
.status-details {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    padding: 1rem;
    border-radius: 0.75rem;
}

.status-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

.status-row .label {
    color: var(--text-secondary);
}

.status-row .value {
    font-weight: 600;
}

/* Badges */
.state-badge {
    padding: 0.25rem 0.6rem;
    border-radius: 0.375rem;
    font-size: 0.75rem;
}

.state-normal {
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent-secondary);
    border: 1px solid rgba(6, 182, 212, 0.2);
}

.state-locked {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.state-reward {
    background: rgba(52, 168, 83, 0.15);
    color: var(--accent-primary);
    border: 1px solid rgba(52, 168, 83, 0.25);
}

.game-badge {
    padding: 0.25rem 0.6rem;
    border-radius: 0.375rem;
    font-size: 0.75rem;
    font-weight: 700 !important;
}

.game-badge.none {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
}

.game-badge.roblox {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 0 5px rgba(255, 255, 255, 0.1);
}

.game-badge.minecraft {
    background: rgba(76, 175, 80, 0.15);
    color: #4CAF50;
    border: 1px solid rgba(76, 175, 80, 0.25);
}

.reward-phase {
    color: var(--accent-primary);
    font-size: 0.8125rem;
}

/* Device Footer Controls */
.device-card-footer {
    padding: 1.25rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.01);
}

.device-card-footer h4 {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
}

.override-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 0.75rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.625rem 1rem;
    border-radius: 0.5rem;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-action {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-action:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-danger {
    background: var(--color-danger-bg);
    border-color: rgba(239, 68, 68, 0.2);
    color: var(--color-danger);
}

.btn-danger:hover {
    background: var(--color-danger);
    color: white;
}

.btn-primary {
    background: var(--accent-primary);
    color: white;
    box-shadow: 0 4px 14px 0 var(--accent-glow);
}

.btn-primary:hover {
    background: #2d9147;
    transform: translateY(-1px);
    box-shadow: 0 6px 20px 0 var(--accent-glow);
}

.btn-large {
    padding: 0.875rem 2rem;
    font-size: 1rem;
    border-radius: 0.75rem;
}

.btn-glow {
    animation: buttonGlowPulse 2s infinite alternate;
}

@keyframes buttonGlowPulse {
    0% { box-shadow: 0 0 8px var(--accent-glow); }
    100% { box-shadow: 0 0 20px var(--accent-primary); }
}

/* Config Section */
.config-section {
    padding: 2rem;
}

.config-section h2 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.config-section p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.config-form {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 1.25rem;
    align-items: flex-end;
}

@media (max-width: 768px) {
    .config-form {
        grid-template-columns: 1fr;
    }
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-group input {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.625rem 0.875rem;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    outline: none;
    transition: border-color 0.2s ease;
}

.form-group input:focus {
    border-color: var(--border-focus);
}

/* -------------------------------------------------------------------------
   STUDENT PORTAL SPECIFIC STYLING
   ------------------------------------------------------------------------- */
.student-body {
    background-color: #06070b;
}

.student-container {
    max-width: 800px;
    margin: 2rem auto;
}

.student-card {
    padding: 2rem;
}

.student-header {
    border-bottom: 1px solid var(--border-color);
    padding: 0 0 1.5rem 0;
    margin-bottom: 1.5rem;
}

.student-logo-icon {
    width: 2.25rem;
    height: 2.25rem;
    color: var(--accent-primary);
    filter: drop-shadow(0 0 5px var(--accent-primary));
}

.alert-banner {
    padding: 0.875rem 1.25rem;
    border-radius: 0.75rem;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
}

.alert-banner.error {
    background: var(--color-danger-bg);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--color-danger);
}

/* Lesson Progress Header */
.lesson-progress-header {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.lesson-num-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.lesson-number-badge {
    background: var(--accent-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.6rem;
    border-radius: 0.375rem;
}

.lesson-progress-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
}

.progress-bar-container {
    height: 6px;
    background: rgba(255,255,255,0.05);
    border-radius: 9999px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 9999px;
    transition: width 0.5s ease;
}

/* Video Frame Wrapper */
.video-container {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
    overflow: hidden;
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
    background: black;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* FAQ / Takeaways Accordion */
.faq-section {
    margin-bottom: 2rem;
}

.faq-section h4 {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.faq-item {
    background: rgba(255,255,255,0.02);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    overflow: hidden;
}

.faq-trigger {
    width: 100%;
    background: none;
    border: none;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    text-align: left;
}

.faq-trigger:hover {
    background: rgba(255,255,255,0.02);
}

.faq-arrow {
    transition: transform 0.3s ease;
    color: var(--text-secondary);
}

.faq-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.faq-content p {
    padding: 0 1rem 1rem 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Quiz Container */
.quiz-container {
    background: rgba(255, 255, 255, 0.02);
    border-radius: 1rem;
    border: 1px solid var(--border-color);
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
}

.card-accent:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
}

.quiz-header {
    margin-bottom: 1.25rem;
}

.quiz-badge {
    background: rgba(52, 168, 83, 0.15);
    color: var(--accent-primary);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.2rem 0.5rem;
    border-radius: 0.25rem;
    display: inline-block;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.quiz-header h4 {
    font-size: 1.125rem;
    font-weight: 700;
}

.quiz-header p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.question-text {
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.5;
    margin-bottom: 1.25rem;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.quiz-option-btn {
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.875rem 1.25rem;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.2s ease;
    width: 100%;
}

.quiz-option-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateX(3px);
}

.option-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    border-radius: 50%;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-color);
    font-size: 0.8125rem;
    font-weight: 700;
    flex-shrink: 0;
}

.quiz-option-btn.selected-correct {
    background: var(--color-success-bg);
    border-color: var(--color-success);
    color: white;
}

.quiz-option-btn.selected-correct .option-letter {
    background: var(--color-success);
    border-color: var(--color-success);
}

.quiz-option-btn.selected-wrong {
    background: var(--color-danger-bg);
    border-color: var(--color-danger);
    color: white;
}

.quiz-option-btn.selected-wrong .option-letter {
    background: var(--color-danger);
    border-color: var(--color-danger);
}

.quiz-feedback {
    margin-top: 1.25rem;
    padding: 0.75rem 1.25rem;
    border-radius: 0.5rem;
    font-size: 0.875rem;
    animation: slideDown 0.3s ease;
}

.quiz-feedback.success {
    background: var(--color-success-bg);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: var(--color-success);
}

.quiz-feedback.error {
    background: var(--color-danger-bg);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--color-danger);
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Reinforce Specifics */
.reinforce-header h3 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-warning);
    margin-top: 0.75rem;
}

.reinforce-header p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0.5rem auto 0 auto;
    line-height: 1.5;
}

.reinforce-icon-glow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 5rem;
    height: 5rem;
    border-radius: 50%;
    background: rgba(245, 158, 11, 0.1);
    color: var(--color-warning);
    border: 1px solid rgba(245, 158, 11, 0.2);
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.25);
}

/* Success View */
.success-screen {
    padding: 2rem 0;
}

.success-icon-wrapper {
    display: flex;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.checkmark {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: block;
    stroke-width: 2;
    stroke: var(--color-success);
    stroke-miterlimit: 10;
    box-shadow: inset 0px 0px 0px var(--color-success);
    animation: fillSuccess .4s ease-in-out .4s forwards, scaleSuccess .3s ease-in-out .9s forwards;
}

.checkmark-circle {
    stroke-dasharray: 166;
    stroke-dashoffset: 166;
    stroke-width: 2;
    stroke-miterlimit: 10;
    stroke: var(--color-success);
    fill: none;
    animation: strokeCheck .6s cubic-bezier(0.65, 0, 0.45, 1) forwards;
}

.checkmark-check {
    transform-origin: 50% 50%;
    stroke-dasharray: 48;
    stroke-dashoffset: 48;
    animation: strokeCheck .3s cubic-bezier(0.65, 0, 0.45, 1) .8s forwards;
}

@keyframes strokeCheck {
    100% { stroke-dashoffset: 0; }
}

@keyframes scaleSuccess {
    0%, 100% { transform: none; }
    50% { transform: scale3d(1.1, 1.1, 1); }
}

@keyframes fillSuccess {
    100% { box-shadow: inset 0px 0px 0px 40px var(--color-success-bg); }
}

.success-screen h2 {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.success-screen p {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    max-width: 480px;
    margin: 0 auto;
    line-height: 1.5;
}

.reward-highlight-box {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.5rem;
    max-width: 320px;
    margin: 2rem auto;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.reward-amount {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-success);
    text-shadow: 0 0 10px rgba(16, 185, 129, 0.25);
}

.reward-label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Helpers */
.text-center { text-align: center; }
.mt-4 { margin-top: 1.5rem; }
.mt-6 { margin-top: 2rem; }

/* Footer styling */
footer {
    background: rgba(10, 11, 16, 0.4);
    border-top: 1px solid var(--border-color);
    padding: 1.5rem 0;
    margin-top: auto;
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Visual Trivia Animations */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-6px); }
    40%, 80% { transform: translateX(6px); }
}

.shake-error {
    animation: shake 0.4s ease-in-out;
}

@keyframes pulseGlow {
    0% { box-shadow: 0 0 5px rgba(16, 185, 129, 0.3); }
    100% { box-shadow: 0 0 15px rgba(16, 185, 129, 0.7); }
}

.quiz-option-btn.selected-correct {
    animation: pulseGlow 1s infinite alternate;
}

#quiz-image {
    transition: transform 0.3s ease;
    cursor: zoom-in;
}

#quiz-image:hover {
    transform: scale(1.02);
}