/* ============================================
   READING CHALLENGES STYLES
   ============================================ */

/* Challenges Page Layout */
.challenges-page {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: 24px 16px;
}

.challenges-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    gap: 16px;
}

.challenges-header .page-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-serif);
    font-size: 2rem;
    color: var(--text-primary);
    margin: 0;
}

/* Stats Dashboard */
.challenges-stats {
    margin-bottom: 32px;
}

.challenge-stats-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: white;
    padding: 20px;
    border-radius: 16px;
    box-shadow: var(--card-shadow);
    text-align: center;
    transition: transform 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
}

.stat-icon {
    font-size: 32px;
    margin-bottom: 8px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Tabs */
.challenges-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    overflow-x: auto;
    padding-bottom: 4px;
}

/* Filters */
.challenges-filters {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.filter-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.filter-group select {
    padding: 8px 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-family: var(--font-sans);
    font-size: 14px;
    background: white;
    cursor: pointer;
    transition: border-color 0.2s;
}

.filter-group select:focus {
    outline: none;
    border-color: var(--primary);
}

/* Challenge Card */
.challenge-card {
    background: white;
    border-radius: 16px;
    padding: 20px;
    box-shadow: var(--card-shadow);
    margin-bottom: 16px;
    transition: transform 0.2s, box-shadow 0.2s;
    border-left: 4px solid var(--primary);
}

.challenge-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.12);
}

.challenge-card.active {
    border-left-color: #00B894;
}

.challenge-card.upcoming {
    border-left-color: #74B9FF;
}

.challenge-card.completed {
    border-left-color: #B2BEC3;
    opacity: 0.8;
}

/* Challenge Header */
.challenge-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.challenge-badges {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.status-badge,
.challenge-type-badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.status-badge.active {
    background: #D5F4E6;
    color: #00B894;
}

.status-badge.upcoming {
    background: #D6EAF8;
    color: #3498DB;
}

.status-badge.completed {
    background: #E8EAED;
    color: #636E72;
}

.challenge-type-badge {
    background: #F3ECFF;
    color: var(--primary);
}

.challenge-circle {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-secondary);
}

/* Challenge Body */
.challenge-title {
    font-family: var(--font-serif);
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 8px 0;
}

.challenge-description {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0 0 16px 0;
    line-height: 1.5;
}

.challenge-goal {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-color);
    border-radius: 12px;
    margin-bottom: 16px;
}

.goal-icon {
    font-size: 32px;
}

.goal-info {
    flex: 1;
}

.goal-label {
    font-size: 12px;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.goal-target {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

/* Challenge Meta */
.challenge-meta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-secondary);
}

.meta-item .icon {
    font-size: 16px;
}

/* Progress */
.challenge-progress-container {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid #E2E8F0;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.progress-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
}

.progress-value {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
}

.progress-bar {
    height: 8px;
    background: #E2E8F0;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 4px;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), #8B5CF6);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.progress-percent {
    text-align: right;
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
}

/* Streak Display */
.streak-display {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
    padding: 8px 12px;
    background: linear-gradient(135deg, #FFF5E6 0%, #FFE8CC 100%);
    border-radius: 8px;
}

.streak-icon {
    font-size: 20px;
}

.streak-count {
    font-size: 14px;
    font-weight: 700;
    color: #E67E22;
}

.streak-best {
    font-size: 12px;
    color: #95A5A6;
    margin-left: auto;
}

/* Not Participating */
.not-participating {
    text-align: center;
    padding: 16px;
    color: var(--text-secondary);
    font-size: 14px;
}

/* Challenge Actions */
.challenge-card-actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid #E2E8F0;
}

.btn-challenge-action {
    flex: 1;
    padding: 10px 16px;
    border: 2px solid var(--primary);
    background: white;
    color: var(--primary);
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-challenge-action:hover {
    background: var(--primary);
    color: white;
}

/* Challenge Modal */
.challenge-modal {
    max-width: 700px;
}

.challenge-form .form-section {
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid #E2E8F0;
}

.challenge-form .form-section:last-child {
    border-bottom: none;
}

.challenge-form .form-section h3 {
    font-family: var(--font-serif);
    font-size: 18px;
    color: var(--text-primary);
    margin: 0 0 16px 0;
}

.goal-hint {
    display: block;
    margin-top: 4px;
    font-size: 12px;
    color: var(--text-secondary);
}

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

/* Responsive */
@media (max-width: 768px) {
    .challenges-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .challenges-header .btn-primary {
        width: 100%;
    }

    .challenge-stats-summary {
        grid-template-columns: repeat(2, 1fr);
    }

    .challenges-filters {
        flex-direction: column;
    }

    .filter-group {
        width: 100%;
    }

    .filter-group select {
        flex: 1;
    }
}

@media (max-width: 480px) {
    .challenges-page {
        padding: 16px 12px;
    }

    .challenge-card {
        padding: 16px;
    }

    .challenge-stats-summary {
        grid-template-columns: 1fr;
    }

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