/* ==================== CHALLENGE MODE STYLES ==================== */
.challenge-description {
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-size: 1rem;
}

.challenge-actions-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 32px;
}

.challenge-action-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 24px 16px;
    background: var(--option-bg);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

@media (hover: hover) {
    .challenge-action-card:hover {
        background: var(--option-hover);
        border-color: var(--accent);
        transform: translateY(-2px);
        box-shadow: var(--shadow-glow);
    }
}

.challenge-action-icon {
    font-size: 2.5rem;
}

.challenge-action-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.challenge-action-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.challenge-history-section {
    margin-top: 24px;
}

.challenge-history-section h3 {
    margin-bottom: 12px;
    color: var(--text-primary);
}

.challenge-history-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.challenge-history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--option-bg);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.challenge-history-item .room-name {
    font-weight: 600;
    color: var(--text-primary);
}

.challenge-history-item .room-info {
    display: flex;
    gap: 12px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.challenge-history-item .room-result {
    font-weight: 600;
}

.challenge-history-item .room-result.win {
    color: var(--success);
}

.challenge-history-item.active-room {
    border-color: var(--success);
    background: rgba(76, 175, 80, 0.05);
}

.challenge-history-item .room-status-badge {
    font-size: 0.75rem;
    font-weight: 600;
}

.scoreboard-item.disconnected {
    opacity: 0.5;
}

/* Card header with back button */
.card-header-with-back {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.card-header-with-back h2 {
    margin: 0;
}

/* Challenge Mode Selector */
.challenge-mode-selector {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-top: 8px;
}

.challenge-mode-option {
    cursor: pointer;
}

.challenge-mode-option input[type="radio"] {
    display: none;
}

.challenge-mode-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 16px 8px;
    background: var(--option-bg);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    text-align: center;
}

.challenge-mode-option input[type="radio"]:checked + .challenge-mode-card {
    border-color: var(--accent);
    background: var(--accent-glow);
}

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

.mode-title {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.mode-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Custom Category Grid */
.challenge-category-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-top: 8px;
}

.challenge-category-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    background: var(--option-bg);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.challenge-category-item label {
    font-size: 0.85rem;
    color: var(--text-primary);
    flex: 1;
}

.challenge-category-item input[type="number"] {
    width: 60px;
    padding: 4px 8px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    text-align: center;
    font-size: 0.9rem;
}

/* Room Lobby */
.room-lobby-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
}

.room-lobby-header h2 {
    margin: 0;
}

/* Room Code Card — big, tappable, shareable */
.room-code-card {
    text-align: center;
    padding: 20px 16px 16px;
    background: var(--accent-glow);
    border: 2px dashed var(--accent);
    border-radius: var(--radius);
    margin-bottom: 16px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
}

.room-code-card:active {
    transform: scale(0.98);
}

.room-code-card-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.room-code-card-value {
    font-size: 2.2rem;
    font-weight: 800;
    letter-spacing: 0.3em;
    color: var(--accent-hover);
    font-family: 'Courier New', monospace;
    user-select: all;
}

.room-code-card-actions {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 12px;
}

.room-code-copied-toast {
    position: absolute;
    top: 8px;
    right: 12px;
    font-size: 0.8rem;
    color: var(--success);
    font-weight: 600;
    animation: fadeIn 0.2s ease-out;
}

.room-info-bar {
    display: flex;
    gap: 20px;
    padding: 12px 16px;
    background: var(--option-bg);
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.participants-section {
    margin-bottom: 20px;
}

.participants-section h3 {
    margin-bottom: 12px;
}

.participants-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.participant-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--option-bg);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.participant-item.is-admin {
    border-color: var(--accent);
    background: var(--accent-glow);
}

.participant-name {
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.participant-badge {
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 12px;
    background: var(--accent);
    color: white;
}

.participant-status {
    font-size: 0.85rem;
}

.participant-status.ready {
    color: var(--success);
    font-weight: 600;
}

.participant-status.waiting {
    color: var(--text-secondary);
}

.lobby-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
    margin-top: 16px;
}

.lobby-status-text {
    margin-top: 12px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Challenge Game */
.challenge-lives {
    display: flex;
    gap: 4px;
    font-size: 1.2rem;
}

#challenge-game.card {
    position: relative;
}

/* 2-column layout: main game + sidebar scoreboard */
.challenge-game-layout {
    display: flex;
    gap: 16px;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.challenge-game-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
}

/* Scoreboard Panel — sidebar on desktop, collapsible on mobile */
.challenge-scoreboard-panel {
    width: 240px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}

.scoreboard-toggle {
    display: none; /* hidden on desktop */
}

.challenge-scoreboard {
    padding: 16px;
    background: var(--option-bg);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    flex: 1;
    overflow-y: auto;
}

.challenge-scoreboard h4 {
    margin-bottom: 12px;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.live-scoreboard {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.scoreboard-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: var(--bg-secondary);
    border-radius: 8px;
    font-size: 0.9rem;
}

.scoreboard-item.current-user {
    border: 1px solid var(--accent);
    background: var(--accent-glow);
}

.scoreboard-rank {
    font-weight: 700;
    color: var(--accent-hover);
    min-width: 24px;
}

.scoreboard-name {
    flex: 1;
    margin-left: 8px;
    color: var(--text-primary);
    font-weight: 500;
}

.scoreboard-score {
    font-weight: 700;
    color: var(--text-primary);
}

.challenge-admin-controls {
    margin-top: 14px;
    border-top: 1px solid var(--border);
    padding-top: 12px;
}

.challenge-admin-controls[open] {
    padding-bottom: 4px;
}

.challenge-admin-summary {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 8px 10px;
    border-radius: 10px;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
    font-size: 0.82rem;
    font-weight: 700;
    background: var(--bg-secondary);
    border: 1px dashed var(--border);
}

.challenge-admin-summary::-webkit-details-marker {
    display: none;
}

.challenge-admin-summary::after {
    content: '▾';
    font-size: 0.75rem;
    transition: transform 0.2s ease;
}

.challenge-admin-controls[open] .challenge-admin-summary::after {
    transform: rotate(180deg);
}

.challenge-admin-controls-body {
    display: flex;
    justify-content: flex-end;
    padding-top: 10px;
}

.challenge-admin-controls-body .btn {
    width: 100%;
}

/* ===== Radial Timer ===== */
.challenge-timer-radial {
    position: relative;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.challenge-timer-radial .timer-svg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.challenge-timer-radial .timer-bg {
    fill: none;
    stroke: var(--border);
    stroke-width: 3;
}

.challenge-timer-radial .timer-ring {
    fill: none;
    stroke: var(--accent);
    stroke-width: 3;
    stroke-linecap: round;
    stroke-dasharray: 125.66;
    stroke-dashoffset: 0;
    transition: stroke-dashoffset 1s linear, stroke 0.3s;
}

.challenge-timer-radial.warning .timer-ring {
    stroke: var(--warning);
}

.challenge-timer-radial.danger .timer-ring {
    stroke: var(--error);
    animation: pulse 0.5s infinite;
}

.challenge-timer-radial .timer-value {
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--text-primary);
    z-index: 1;
}

.challenge-timer-radial.warning .timer-value {
    color: var(--warning);
}

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

/* ===== Countdown Overlay ===== */
.challenge-countdown-overlay {
    position: absolute;
    inset: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(15, 15, 26, 0.92);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(8px);
}

body:not(.dark-mode) .challenge-countdown-overlay {
    background: rgba(248, 249, 254, 0.95);
}

.countdown-number {
    font-size: 6rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: countdownPop 0.8s ease-out;
    line-height: 1;
}

.countdown-label {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-top: 12px;
    font-weight: 600;
}

@keyframes countdownPop {
    0% { transform: scale(2); opacity: 0; }
    50% { transform: scale(0.9); opacity: 1; }
    100% { transform: scale(1); opacity: 1; }
}

/* Answer Status */
.answer-status {
    text-align: center;
    padding: 8px 16px;
    margin-top: 8px;
    border-radius: var(--radius-sm);
    background: var(--option-bg);
    border: 1px solid var(--border);
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.answer-status.all-answered {
    background: rgba(76, 175, 80, 0.1);
    border-color: #4caf50;
    color: #4caf50;
}

.challenge-feedback-explanation {
    margin-top: 12px;
}

.challenge-answer-insights {
    margin-top: 12px;
    padding: 14px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    background:
        linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent),
        var(--option-bg);
}

.challenge-answer-insights-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.challenge-answer-insights-title {
    font-weight: 700;
    color: var(--text-primary);
}

.challenge-answer-insights-meta {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.challenge-answer-insights-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
}

.challenge-answer-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
}

.challenge-answer-card.self {
    border-color: var(--accent);
    background: var(--accent-glow);
}

.challenge-answer-card.disconnected {
    opacity: 0.65;
}

.challenge-answer-card.eliminated {
    border-style: dashed;
}

.challenge-answer-card-main {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.challenge-answer-name {
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.challenge-answer-role {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.challenge-answer-value {
    min-width: 52px;
    padding: 6px 10px;
    border-radius: 999px;
    text-align: center;
    font-weight: 800;
    font-size: 0.8rem;
    color: var(--text-primary);
    background: var(--option-bg);
    border: 1px solid transparent;
}

.challenge-answer-value.answered {
    color: #fff;
    background: var(--gradient-primary);
}

.challenge-answer-value.timeout {
    color: #fff;
    background: linear-gradient(135deg, #f59e0b, #ef4444);
}

.challenge-answer-value.pending,
.challenge-answer-value.disconnected,
.challenge-answer-value.eliminated {
    color: var(--text-secondary);
    background: transparent;
    border-color: var(--border);
}

/* Challenge Results */
.challenge-winner-section {
    text-align: center;
    padding: 24px;
    margin-bottom: 24px;
}

.winner-announcement {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--warning);
    margin-bottom: 8px;
}

.winner-name {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-warm);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.winner-stats {
    color: var(--text-secondary);
    margin-top: 8px;
}

.challenge-results-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 24px;
}

.result-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--option-bg);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.result-row.rank-1 {
    border-color: #ffd700;
    background: rgba(255, 215, 0, 0.1);
}

.result-row.rank-2 {
    border-color: #c0c0c0;
    background: rgba(192, 192, 192, 0.1);
}

.result-row.rank-3 {
    border-color: #cd7f32;
    background: rgba(205, 127, 50, 0.1);
}

.result-rank {
    font-size: 1.5rem;
    font-weight: 800;
    min-width: 40px;
    text-align: center;
}

.result-info {
    flex: 1;
}

.result-username {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1.05rem;
}

.result-detail {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.result-score {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--accent-hover);
}

.challenge-result-actions {
    text-align: center;
    margin-top: 24px;
}

/* Room Settings Section */
.room-settings-section {
    margin-top: 8px;
    margin-bottom: 20px;
}

.settings-section-title {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.room-settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.room-setting-card {
    padding: 14px 16px;
    background: var(--option-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: border-color 0.2s ease;
}

.room-setting-card:hover {
    border-color: var(--accent);
}

.setting-header {
    display: flex;
    align-items: center;
    gap: 8px;
}

.setting-icon {
    font-size: 1.2rem;
}

.setting-title {
    font-weight: 600;
    font-size: 0.88rem;
    color: var(--text-primary);
}

.setting-select {
    width: 100%;
    padding: 8px 12px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.88rem;
    font-family: inherit;
    cursor: pointer;
    appearance: auto;
    transition: border-color 0.2s ease;
}

.setting-select:focus {
    outline: none;
    border-color: var(--accent);
}

/* Responsive */
/* Mobile: scoreboard becomes collapsible bar */
@media (max-width: 768px) {
    .challenge-game-layout {
        flex-direction: column;
    }

    .challenge-scoreboard-panel {
        width: 100%;
        order: -1; /* above the game area */
    }

    .scoreboard-toggle {
        display: flex;
        align-items: center;
        gap: 8px;
        width: 100%;
        padding: 8px 14px;
        background: var(--option-bg);
        border: 1px solid var(--border);
        border-radius: var(--radius-sm);
        cursor: pointer;
        font-size: 0.85rem;
        color: var(--text-primary);
        font-family: inherit;
        font-weight: 600;
        transition: background 0.2s;
    }

    .scoreboard-toggle:active {
        background: var(--option-hover);
    }

    .scoreboard-toggle-rank {
        background: var(--gradient-primary);
        color: white;
        padding: 2px 8px;
        border-radius: 10px;
        font-size: 0.8rem;
        font-weight: 700;
    }

    .scoreboard-toggle-label {
        flex: 1;
    }

    .scoreboard-toggle-arrow {
        font-size: 0.7rem;
        transition: transform 0.2s;
    }

    .challenge-scoreboard-panel.expanded .scoreboard-toggle-arrow {
        transform: rotate(180deg);
    }

    .challenge-scoreboard {
        display: none;
        margin-top: 4px;
        max-height: 200px;
        overflow-y: auto;
    }

    .challenge-scoreboard-panel.expanded .challenge-scoreboard {
        display: block;
        animation: fadeIn 0.2s ease-out;
    }
}

@media (max-width: 600px) {
    .challenge-actions-grid {
        grid-template-columns: 1fr;
    }
    
    .challenge-mode-selector {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .challenge-category-grid {
        grid-template-columns: 1fr;
    }
    
    .room-settings-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .room-lobby-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .room-info-bar {
        flex-wrap: wrap;
        gap: 12px;
    }
    
    .room-code-card-value {
        font-size: 1.6rem;
    }
}

@media (max-width: 400px) {
    .room-settings-grid {
        grid-template-columns: 1fr;
    }
}