/* ===== Cards (Glassmorphism) ===== */
.card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    backdrop-filter: blur(10px);
    transition: all var(--transition);
}

.card:hover {
    border-color: rgba(108, 99, 255, 0.3);
    box-shadow: var(--shadow);
}

.card-glow {
    box-shadow: var(--shadow-glow);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    transition: all var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0);
    transition: background var(--transition);
}

.btn:hover::after {
    background: rgba(255, 255, 255, 0.1);
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), #5a52d5);
    color: white;
    box-shadow: 0 4px 15px rgba(108, 99, 255, 0.3);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(108, 99, 255, 0.5);
    transform: translateY(-1px);
}

.btn-secondary {
    background: rgba(108, 99, 255, 0.15);
    color: var(--accent-primary);
    border: 1px solid rgba(108, 99, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(108, 99, 255, 0.25);
}

.btn-success {
    background: linear-gradient(135deg, var(--success), #00c853);
    color: #0f0f23;
    box-shadow: 0 4px 15px rgba(0, 230, 118, 0.3);
}

.btn-success:hover {
    box-shadow: 0 6px 20px rgba(0, 230, 118, 0.5);
    transform: translateY(-1px);
}

.btn-danger {
    background: linear-gradient(135deg, var(--error), #d32f2f);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 82, 82, 0.3);
}

.btn-danger:hover {
    box-shadow: 0 6px 20px rgba(255, 82, 82, 0.5);
    transform: translateY(-1px);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning), #e65100);
    color: #0f0f23;
    box-shadow: 0 4px 15px rgba(255, 171, 64, 0.3);
}

.btn-warning:hover {
    box-shadow: 0 6px 20px rgba(255, 171, 64, 0.5);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-ghost:hover {
    border-color: var(--accent-primary);
    color: var(--text-primary);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 50%;
}

/* ===== Flashcard ===== */
.flashcard-container {
    perspective: 1000px;
    width: 100%;
    max-width: 500px;
    height: 320px;
    margin: 0 auto;
    cursor: pointer;
}

.flashcard {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.flashcard.flipped {
    transform: rotateY(180deg);
}

.flashcard-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    border-radius: var(--radius);
    border: 1px solid var(--glass-border);
    text-align: center;
}

.flashcard-front {
    background: linear-gradient(135deg, var(--bg-card), #1f1f4a);
    border: 2px solid var(--border-color);
}

.flashcard-back {
    background: linear-gradient(135deg, #1f1f4a, var(--bg-card));
    border: 2px solid rgba(0, 210, 255, 0.3);
    transform: rotateY(180deg);
}

.flashcard-category {
    font-size: 0.75rem;
    color: var(--accent-secondary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 1rem;
    font-weight: 600;
}

.flashcard-question {
    font-size: 1.3rem;
    font-weight: 600;
    line-height: 1.5;
    color: var(--text-primary);
}

.flashcard-answer {
    font-size: 1.4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.flashcard-hint {
    font-size: 0.82rem;
    color: var(--accent-secondary);
    margin-top: 1.1rem;
    padding: 0.55rem 0.9rem;
    background: rgba(0, 210, 255, 0.07);
    border-left: 3px solid rgba(0, 210, 255, 0.4);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
    line-height: 1.4;
}

.flashcard-flip-hint {
    position: absolute;
    bottom: 1rem;
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* ===== Progress Bar ===== */
.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 4px;
    transition: width 0.5s ease;
}

.progress-bar-success .progress-bar-fill {
    background: linear-gradient(90deg, var(--success), #69f0ae);
}

/* ===== Badge ===== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    transition: all var(--transition);
}

.badge.earned {
    border-color: rgba(108, 99, 255, 0.4);
    background: rgba(108, 99, 255, 0.1);
}

.badge.locked {
    opacity: 0.4;
    filter: grayscale(1);
}

.badge-icon {
    font-size: 1.5rem;
}

.badge-info {
    display: flex;
    flex-direction: column;
}

.badge-name {
    font-weight: 600;
    font-size: 0.85rem;
}

.badge-desc {
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* ===== Stats Card ===== */
.stat-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    text-align: center;
    transition: all var(--transition);
}

.stat-card:hover {
    border-color: rgba(108, 99, 255, 0.3);
    transform: translateY(-2px);
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== Category Card ===== */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.category-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 1.75rem;
    cursor: pointer;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    opacity: 0;
    transition: opacity var(--transition);
}

.category-card:hover {
    transform: translateY(-4px);
    border-color: rgba(108, 99, 255, 0.4);
    box-shadow: var(--shadow-glow);
}

.category-card:hover::before {
    opacity: 1;
}

.category-card-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.category-card-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.category-card-count {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.category-card .progress-bar {
    margin-bottom: 0.5rem;
}

.category-card-progress-text {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ===== Subcategory List ===== */
.subcategory-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 1rem;
}

.subcategory-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
}

.subcategory-item:hover {
    background: rgba(108, 99, 255, 0.1);
}

.subcategory-item-name {
    font-size: 0.9rem;
    font-weight: 500;
}

.subcategory-item-count {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===== Streak Display ===== */
.streak-display {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
}

.streak-fire {
    font-size: 2rem;
    animation: fireGlow 1.5s ease-in-out infinite alternate;
}

@keyframes fireGlow {
    from { filter: brightness(1); transform: scale(1); }
    to { filter: brightness(1.3); transform: scale(1.1); }
}

.streak-info .streak-count {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--warning);
}

.streak-info .streak-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ===== Daily Goal ===== */
.daily-goal {
    padding: 1.25rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
}

.daily-goal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.daily-goal-title {
    font-size: 0.9rem;
    font-weight: 600;
}

.daily-goal-count {
    font-size: 0.85rem;
    color: var(--accent-secondary);
    font-weight: 600;
}

/* ===== Quiz Option ===== */
.quiz-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 1.5rem;
}

.quiz-option {
    padding: 1rem 1.25rem;
    background: var(--glass-bg);
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    font-size: 0.95rem;
    text-align: center;
    font-weight: 500;
}

.quiz-option:hover {
    border-color: var(--accent-primary);
    background: rgba(108, 99, 255, 0.1);
    transform: translateY(-2px);
}

.quiz-option.correct {
    border-color: var(--success);
    background: rgba(0, 230, 118, 0.15);
    animation: correctPulse 0.5s ease;
}

.quiz-option.incorrect {
    border-color: var(--error);
    background: rgba(255, 82, 82, 0.15);
    animation: shake 0.4s ease;
}

.quiz-option.disabled {
    pointer-events: none;
    opacity: 0.6;
}

.quiz-option.show-correct {
    border-color: var(--success);
    background: rgba(0, 230, 118, 0.1);
}

@keyframes correctPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.03); }
    100% { transform: scale(1); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* ===== Timer ===== */
.timer {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.2rem;
    font-weight: 700;
}

.timer.warning {
    color: var(--warning);
    animation: timerPulse 0.5s ease infinite;
}

.timer.danger {
    color: var(--error);
}

@keyframes timerPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ===== Notification Toast ===== */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    padding: 1rem 1.5rem;
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    animation: toastIn 0.3s ease, toastOut 0.3s ease 2.7s;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 280px;
    backdrop-filter: blur(10px);
}

.toast-xp {
    border-color: rgba(108, 99, 255, 0.4);
}

.toast-success {
    border-color: rgba(0, 230, 118, 0.4);
}

.toast-badge {
    border-color: rgba(255, 171, 64, 0.4);
}

.toast-icon {
    font-size: 1.3rem;
}

.toast-message {
    font-size: 0.9rem;
    font-weight: 500;
}

.toast-sub {
    font-size: 0.75rem;
    color: var(--text-muted);
}

@keyframes toastIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes toastOut {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(100%); opacity: 0; }
}

/* ===== Modal ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    animation: fadeIn 0.2s ease;
    backdrop-filter: blur(4px);
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 2rem;
    max-width: 450px;
    width: 90%;
    animation: modalIn 0.3s ease;
    text-align: center;
}

.modal h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.modal p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes modalIn {
    from { transform: scale(0.9); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

/* ===== Confetti ===== */
.confetti-piece {
    position: fixed;
    width: 8px;
    height: 8px;
    z-index: 10001;
    pointer-events: none;
}

/* ===== Activity Chart ===== */
.activity-chart {
    display: flex;
    align-items: flex-end;
    gap: 0.5rem;
    height: 120px;
    padding: 1rem 0;
}

.activity-bar-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    height: 100%;
}

.activity-bar {
    flex: 1;
    width: 100%;
    max-width: 40px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: flex-end;
}

.activity-bar-fill {
    width: 100%;
    background: linear-gradient(180deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 4px;
    transition: height 0.5s ease;
    min-height: 2px;
}

.activity-label {
    font-size: 0.65rem;
    color: var(--text-muted);
}

.activity-value {
    font-size: 0.65rem;
    color: var(--text-secondary);
}

/* ===== Filter Tabs ===== */
.filter-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
}

.filter-tab:hover {
    color: var(--text-primary);
    background: rgba(108, 99, 255, 0.1);
}

.filter-tab.active {
    color: var(--accent-primary);
    background: rgba(108, 99, 255, 0.15);
    border-color: rgba(108, 99, 255, 0.3);
}

/* ===== Review cards section ===== */
.review-cards-section {
    margin-top: 2rem;
}

.review-cards-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.review-card-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.85rem 1.25rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
}

.review-card-item:hover {
    border-color: rgba(108, 99, 255, 0.3);
    background: rgba(108, 99, 255, 0.05);
}

.review-card-question {
    font-size: 0.9rem;
    font-weight: 500;
}

.review-card-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ===== Empty State ===== */
.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state-text {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.empty-state-sub {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ===== Level Up Animation ===== */
.level-up-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10002;
    animation: fadeIn 0.3s ease;
}

.level-up-content {
    text-align: center;
    animation: levelUpBounce 0.6s ease;
}

.level-up-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.level-up-title {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.level-up-name {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

@keyframes levelUpBounce {
    0% { transform: scale(0.3); opacity: 0; }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

/* ===== Score Results ===== */
.quiz-results {
    text-align: center;
    padding: 2rem;
}

.quiz-results-score {
    font-size: 4rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.quiz-results-label {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.quiz-results-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
}

.quiz-results-stat {
    text-align: center;
}

.quiz-results-stat-value {
    font-size: 1.5rem;
    font-weight: 700;
}

.quiz-results-stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===== Quiz Live (squiz.gg style) ===== */

/* Lobby */
.quiz-lobby {
    max-width: 460px;
    margin: 2rem auto;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.quiz-lobby-live-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 1rem;
    background: rgba(255, 82, 82, 0.15);
    border: 1px solid rgba(255, 82, 82, 0.4);
    border-radius: 100px;
    color: #ff5252;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.quiz-lobby-live-dot {
    width: 8px;
    height: 8px;
    background: #ff5252;
    border-radius: 50%;
    animation: livePulse 1.5s ease infinite;
}

@keyframes livePulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.7); }
}

.quiz-lobby-title {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin: 0;
}

.quiz-lobby-sub {
    color: var(--text-secondary);
    margin: -1rem 0 0;
}

.quiz-name-input {
    width: 100%;
    padding: 0.9rem 1.25rem;
    background: var(--glass-bg);
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1.1rem;
    font-family: var(--font);
    text-align: center;
    transition: border-color var(--transition);
}

.quiz-name-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.15);
}

.quiz-name-input::placeholder { color: var(--text-muted); }

.quiz-lobby-info {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Live question screen */
.quiz-live {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.quiz-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.quiz-topbar-left, .quiz-topbar-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
}

.quiz-topbar-right { justify-content: flex-end; }

.quiz-round-tag {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.quiz-q-tag {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.quiz-timer-ring {
    width: 54px;
    height: 54px;
    border-radius: 50%;
    border: 3px solid var(--accent-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--accent-secondary);
    flex-shrink: 0;
    transition: border-color 0.3s, color 0.3s;
}

.quiz-timer-ring.warning {
    border-color: var(--warning);
    color: var(--warning);
}

.quiz-timer-ring.danger {
    border-color: var(--error);
    color: var(--error);
    animation: timerPulse 0.5s ease infinite;
}

.quiz-streak-badge {
    padding: 0.2rem 0.6rem;
    background: rgba(255, 171, 64, 0.15);
    border: 1px solid rgba(255, 171, 64, 0.3);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--warning);
}

.quiz-pts-badge {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.quiz-live-progress {
    height: 4px;
    background: rgba(255,255,255,0.07);
    border-radius: 2px;
    overflow: hidden;
}

.quiz-live-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 2px;
    transition: width 0.4s ease;
}

.quiz-question-box {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
    padding: 2rem 1.5rem;
    text-align: center;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    backdrop-filter: blur(10px);
}

.quiz-category-badge {
    display: inline-block;
    padding: 0.3rem 1rem;
    background: rgba(108, 99, 255, 0.15);
    border: 1px solid rgba(108, 99, 255, 0.3);
    border-radius: 100px;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.quiz-answer-row {
    display: flex;
    gap: 0.75rem;
    align-items: stretch;
}

.quiz-answer-input {
    flex: 1;
    padding: 0.85rem 1.25rem;
    background: var(--glass-bg);
    border: 2px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: var(--font);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.quiz-answer-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.15);
}

.quiz-answer-input::placeholder { color: var(--text-muted); }
.quiz-answer-input:disabled { opacity: 0.55; pointer-events: none; }

.quiz-submit-btn { padding: 0.85rem 1.35rem; font-size: 1.1rem; }

.quiz-feedback-wrap { min-height: 80px; }

.quiz-feedback {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    border-radius: var(--radius-sm);
    border-left: 4px solid transparent;
    animation: feedbackSlide 0.25s ease;
}

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

.quiz-feedback--correct {
    background: rgba(0, 230, 118, 0.08);
    border-left-color: var(--success);
}

.quiz-feedback--incorrect {
    background: rgba(255, 82, 82, 0.08);
    border-left-color: var(--error);
}

.quiz-fb-icon { font-size: 1.3rem; flex-shrink: 0; margin-top: 0.1rem; }

.quiz-fb-body {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.quiz-fb-verdict { font-weight: 700; font-size: 1rem; }
.quiz-fb-verdict em { font-style: normal; color: var(--success); }
.quiz-fb-streak { font-size: 0.85rem; color: var(--warning); font-weight: 600; }
.quiz-fb-label { font-size: 0.8rem; color: var(--text-muted); }
.quiz-fb-answer { font-size: 1rem; font-weight: 700; color: var(--accent-secondary); }

.quiz-feedback--wrong {
    background: rgba(255, 171, 64, 0.08);
    border-left-color: var(--warning);
}

.quiz-feedback--locked {
    background: rgba(255, 82, 82, 0.12);
    border-left-color: var(--error);
}

.quiz-feedback--timeout {
    background: rgba(176, 176, 192, 0.08);
    border-left-color: var(--text-muted);
}

.quiz-fb-attempts {
    font-size: 0.8rem;
    color: var(--warning);
    font-weight: 600;
}

/* Attempts hearts row */
.quiz-answer-area { display: flex; flex-direction: column; gap: 0.5rem; }

.quiz-attempts-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0 0.25rem;
}

.quiz-attempts-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Live leaderboard strip */
.quiz-lb-strip {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.quiz-lb-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.quiz-lb-ratio { color: var(--text-muted); font-weight: 400; }

.quiz-lb-player-row {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.9rem;
}

.quiz-lb-rank { font-size: 1rem; }
.quiz-lb-pname { font-weight: 700; flex: 1; }
.quiz-lb-pscore { font-weight: 700; color: var(--accent-secondary); }

.quiz-lb-dots {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
}

.quiz-lb-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    flex-shrink: 0;
    transition: background 0.3s;
}

.quiz-lb-dot.correct   { background: var(--success); box-shadow: 0 0 6px rgba(0,230,118,0.4); }
.quiz-lb-dot.incorrect { background: var(--error);   box-shadow: 0 0 6px rgba(255,82,82,0.3); }
.quiz-lb-dot.upcoming  { background: rgba(255,255,255,0.1); }

/* Break / intermission screen */
.quiz-break {
    max-width: 480px;
    margin: 1rem auto;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.75rem;
}

.quiz-break-top {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.quiz-break-emoji { font-size: 3rem; }

.quiz-break-title {
    font-size: 1.75rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.quiz-break-player { font-size: 1rem; color: var(--text-secondary); font-weight: 600; }

.quiz-break-stats {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.quiz-break-stat { text-align: center; }

.quiz-break-stat-val {
    font-size: 2rem;
    font-weight: 800;
}

.quiz-break-stat-lbl {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.15rem;
}

.quiz-break-countdown {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 1.25rem 2.5rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius);
}

.quiz-break-cdt-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.quiz-break-cdt-num {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--accent-secondary);
    line-height: 1;
}

/* ===== Mastered Toast ===== */
.mastered-toast {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.6);
    background: linear-gradient(135deg, rgba(0,230,118,0.15), rgba(0,230,118,0.05));
    border: 2px solid rgba(0,230,118,0.5);
    border-radius: var(--radius);
    padding: 1.5rem 2rem;
    text-align: center;
    z-index: 1000;
    pointer-events: none;
    backdrop-filter: blur(20px);
    box-shadow: 0 0 40px rgba(0,230,118,0.25);
    animation: mastered-pop 2.4s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
    min-width: 220px;
}

@keyframes mastered-pop {
    0%   { opacity: 0; transform: translate(-50%, -50%) scale(0.5); }
    20%  { opacity: 1; transform: translate(-50%, -50%) scale(1.05); }
    35%  { transform: translate(-50%, -50%) scale(1); }
    75%  { opacity: 1; transform: translate(-50%, -50%) scale(1); }
    100% { opacity: 0; transform: translate(-50%, -58%) scale(0.95); }
}

.mastered-toast-icon {
    font-size: 2.5rem;
    line-height: 1;
    margin-bottom: 0.4rem;
}

.mastered-toast-label {
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--success);
    margin-bottom: 0.2rem;
}

.mastered-toast-value {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--success);
    line-height: 1.1;
}

.mastered-toast-sub {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
}