/* ============================================
   GROUP CHALLENGES STYLES
   ============================================ */

/* Challenge Cards Grid */
.challenges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.challenge-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.challenge-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    border-color: var(--primary-color);
}

.challenge-card.inactive {
    opacity: 0.7;
}

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

.challenge-header h3 {
    margin: 0;
    font-size: 18px;
    color: var(--text-primary);
}

.challenge-status {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
}

.challenge-status.active {
    background: linear-gradient(135deg, #4ecdc4, #44a08d);
    color: white;
}

.challenge-status.inactive {
    background: var(--border-color);
    color: var(--text-secondary);
}

.challenge-group {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 8px;
}

.challenge-description {
    color: var(--text-secondary);
    font-size: 14px;
    margin: 12px 0;
    line-height: 1.4;
}

.challenge-rules {
    display: flex;
    gap: 16px;
    margin: 12px 0;
    font-size: 14px;
    color: var(--text-primary);
}

.challenge-rules div {
    display: flex;
    align-items: center;
    gap: 6px;
}

.challenge-participants {
    color: var(--text-secondary);
    font-size: 13px;
    margin-top: 8px;
}

.challenge-dates {
    color: var(--text-secondary);
    font-size: 13px;
    margin-top: 8px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

/* Challenge Info Bar */
.challenge-info-bar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: center;
}

.challenge-goal {
    font-size: 16px;
}

/* Calendar Legend */
.calendar-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin: 20px 0;
    padding: 16px;
    background: var(--card-bg);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}

.color-dot {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    flex-shrink: 0;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.member-name {
    font-weight: 600;
    color: var(--text-primary);
}

.member-count {
    color: var(--text-secondary);
    font-size: 13px;
}

/* Calendar Controls */
.calendar-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 20px 0;
    padding: 12px 0;
}

.calendar-controls span {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

/* Group Calendar Grid */
.group-calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
    margin: 20px 0;
}

.calendar-day-header {
    text-align: center;
    font-weight: 600;
    font-size: 13px;
    color: white;
    padding: 8px 4px;
}

.calendar-day {
    position: relative;
    min-height: 90px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px;
    background: var(--card-bg);
    transition: all 0.2s ease;
}

.calendar-day:hover {
    background: var(--hover-bg);
    border-color: var(--primary-color);
}

.calendar-day.empty {
    background: transparent;
    border: none;
}

.calendar-day.today {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    border-color: var(--primary-color);
    font-weight: bold;
}

.date-number {
    position: absolute;
    top: 6px;
    left: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.workout-dots {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 28px;
    justify-content: center;
    align-items: center;
}

.workout-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 1px 4px rgba(0,0,0,0.2);
    position: relative;
}

.workout-dot:hover {
    transform: scale(1.6);
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
    z-index: 10;
}

/* Week Progress Summary */
.week-progress-summary {
    margin-top: 30px;
    padding: 20px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.week-progress-summary h4 {
    margin: 0 0 16px 0;
    color: var(--text-primary);
}

.week-progress-summary #weekDates {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: normal;
}

.progress-table {
    width: 100%;
    border-collapse: collapse;
}

.progress-table th {
    text-align: left;
    padding: 12px;
    background: var(--hover-bg);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 14px;
    border-bottom: 2px solid var(--border-color);
}

.progress-table td {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.progress-table tr:last-child td {
    border-bottom: none;
}

.progress-row-success {
    background: rgba(78, 205, 196, 0.1);
}

.progress-row-warning {
    background: rgba(255, 165, 0, 0.1);
}

.status-success {
    color: #4ecdc4;
    font-weight: 600;
}

.status-warning {
    color: #ff9800;
    font-weight: 600;
}

/* Large Modal for Calendar */
.large-modal {
    max-width: 1200px;
}

.large-modal .modal-body {
    max-height: 80vh;
    overflow-y: auto;
}

/* Form Row for Challenge Creation */
.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-row .form-group {
    margin-bottom: 0;
}

/* Required Field Indicator */
.required {
    color: #ff6b6b;
    margin-left: 2px;
}

/* Empty State for Challenges */
.challenges-grid .empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
}

.challenges-grid .empty-state i {
    font-size: 48px;
    opacity: 0.3;
    margin-bottom: 16px;
    display: block;
}

.challenges-grid .empty-state p {
    margin: 8px 0;
    color: var(--text-secondary);
}

/* Challenges Header */
.challenges-header {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 20px;
}

/* Group Details Tabs */
.group-details-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0;
}

.group-details-tabs .tab-btn {
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    padding: 12px 20px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    margin-bottom: -2px;
}

.group-details-tabs .tab-btn:hover {
    color: var(--text-primary);
    background: var(--hover-bg);
}

.group-details-tabs .tab-btn.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.group-details-tabs .tab-btn i {
    margin-right: 6px;
}

/* ============================================
   EXERCISE SUGGESTION MODAL
   ============================================ */

#exerciseSuggestionModal .modal-footer {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.suggestion-message {
    margin: 0 0 16px;
    font-size: 15px;
    color: var(--text-secondary);
}

.suggestion-plateau-warning {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 165, 0, 0.12);
    border: 1px solid rgba(255, 165, 0, 0.3);
    border-radius: 8px;
    padding: 10px 14px;
    margin-bottom: 16px;
    font-size: 14px;
    color: #e6a400;
}

.suggestion-plateau-warning i {
    font-size: 18px;
    flex-shrink: 0;
}

.suggestion-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

.suggestion-exercise-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 14px;
    cursor: pointer;
    transition: border-color 0.2s, transform 0.15s;
}

.suggestion-exercise-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.suggestion-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 6px;
}

.suggestion-card-details {
    display: flex;
    gap: 14px;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.suggestion-card-details i {
    margin-right: 4px;
}

.suggestion-reason {
    font-size: 12px;
    color: var(--text-muted, #888);
}

.suggestion-badge {
    background: var(--primary-color);
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 12px;
}

.suggestion-group {
    margin-bottom: 18px;
}

.suggestion-group h4 {
    margin: 0 0 8px;
    font-size: 15px;
}

.suggestion-group h4 small {
    font-weight: 400;
    color: var(--text-secondary);
}

@media (max-width: 480px) {
    #exerciseSuggestionModal .modal-footer {
        flex-direction: column;
    }

    #exerciseSuggestionModal .modal-footer .btn {
        width: 100%;
        text-align: center;
    }
}

/* Challenge Card Meta Row (participants + action button) */
.challenge-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 8px;
}

.challenge-action-btn {
    font-size: 12px;
    padding: 4px 12px;
}

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

.btn-outline:hover {
    background: var(--hover-bg);
    border-color: var(--text-secondary);
}

/* Delete button in modal header */
.btn-danger {
    background: #e74c3c;
    color: white;
    border: none;
}

.btn-danger:hover {
    background: #c0392b;
}

/* Challenge Leaderboard */
.challenge-leaderboard-section {
    margin-top: 30px;
    padding: 20px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.challenge-leaderboard-section h4 {
    margin: 0 0 16px 0;
    color: var(--text-primary);
}

.leaderboard-table .leaderboard-rank {
    font-weight: 700;
    font-size: 16px;
    text-align: center;
    width: 40px;
}

.leaderboard-top td {
    background: rgba(255, 215, 0, 0.05);
}

.leaderboard-top:first-child td {
    background: rgba(255, 215, 0, 0.1);
}

/* ============================================
   RESPONSIVE DESIGN - CHALLENGES
   ============================================ */

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .calendar-legend {
        flex-direction: column;
        gap: 12px;
    }

    .group-calendar-grid {
        gap: 4px;
    }

    .calendar-day {
        min-height: 70px;
        padding: 4px;
    }

    .workout-dot {
        width: 10px;
        height: 10px;
    }

    .workout-dot:hover {
        transform: scale(1.4);
    }

    .date-number {
        font-size: 12px;
        top: 4px;
        left: 4px;
    }

    .workout-dots {
        margin-top: 22px;
        gap: 3px;
    }

    .progress-table {
        font-size: 13px;
    }

    .progress-table th,
    .progress-table td {
        padding: 8px 4px;
    }

    .challenge-header {
        flex-direction: column;
        gap: 8px;
    }

    .challenge-rules {
        flex-direction: column;
        gap: 8px;
    }

    .calendar-controls {
        flex-direction: column;
        gap: 12px;
    }

    .large-modal {
        max-width: 95%;
    }
}