/* ============================================
   STREAK DISPLAY SYSTEM
   Enhanced visual streak tracking with animations
   ============================================ */

/* Streak Card Container */
.streak-card {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    color: white;
    box-shadow: var(--shadow-lg);
    text-align: center;
    position: relative;
    overflow: hidden;
}

[data-theme="modern"] .streak-card {
    background: linear-gradient(135deg, #1a1f35, #0f1419);
    border: 2px solid var(--primary);
    box-shadow: var(--glow-primary), var(--shadow-lg);
}

/* Streak Header */
.streak-header {
    font-size: 1.2rem;
    font-weight: var(--font-weight-bold);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

/* Flame Icon with Size Scaling */
.streak-flame {
    display: inline-block;
    animation: flicker 2s infinite;
    filter: drop-shadow(0 0 10px rgba(255,100,0,0.8));
    transition: transform 0.3s ease;
}

.streak-flame.size-1 { font-size: 3rem; }
.streak-flame.size-2 { font-size: 3.5rem; }
.streak-flame.size-3 { font-size: 4rem; }
.streak-flame.size-4 { font-size: 4.5rem; }
.streak-flame.size-5 { font-size: 5rem; }

@keyframes flicker {
    0%, 100% { 
        transform: scale(1) rotate(-2deg);
        opacity: 1;
    }
    25% { 
        transform: scale(1.05) rotate(2deg);
        opacity: 0.95;
    }
    50% { 
        transform: scale(0.98) rotate(-1deg);
        opacity: 1;
    }
    75% { 
        transform: scale(1.03) rotate(1deg);
        opacity: 0.97;
    }
}

[data-theme="modern"] .streak-flame {
    filter: drop-shadow(0 0 15px var(--primary)) drop-shadow(0 0 8px var(--secondary));
}

/* Current Streak Number */
.streak-count {
    font-size: 3rem;
    font-weight: 900;
    margin: var(--spacing-sm) 0;
    text-shadow: 0 4px 8px rgba(0,0,0,0.3);
    line-height: 1;
}

.streak-label {
    font-size: 1rem;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* New Record Badge */
.streak-record-badge {
    background: rgba(255,215,0,0.2);
    border: 2px solid gold;
    border-radius: 20px;
    padding: 4px 12px;
    font-size: 0.85rem;
    display: inline-block;
    margin-top: var(--spacing-xs);
    animation: pulse 1.5s infinite;
}

[data-theme="modern"] .streak-record-badge {
    background: rgba(124,58,237,0.3);
    border-color: var(--primary);
    box-shadow: var(--glow-primary);
}

/* Progress Bars */
.streak-progress-section {
    margin-top: var(--spacing-lg);
    background: rgba(255,255,255,0.1);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-md);
}

[data-theme="modern"] .streak-progress-section {
    background: rgba(15,23,42,0.5);
    border: 1px solid rgba(124,58,237,0.3);
}

.streak-progress-item {
    margin-bottom: var(--spacing-md);
}

.streak-progress-item:last-child {
    margin-bottom: 0;
}

.streak-progress-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
    opacity: 0.95;
}

.streak-progress-bar {
    height: 12px;
    background: rgba(255,255,255,0.2);
    border-radius: 20px;
    overflow: hidden;
    position: relative;
}

.streak-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, rgba(255,255,255,0.8), rgba(255,255,255,0.6));
    border-radius: 20px;
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.streak-progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

[data-theme="modern"] .streak-progress-fill {
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}

/* Streak Calendar Heatmap */
.streak-calendar {
    margin-top: var(--spacing-lg);
    background: rgba(255,255,255,0.1);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-md);
}

[data-theme="modern"] .streak-calendar {
    background: rgba(15,23,42,0.5);
    border: 1px solid rgba(124,58,237,0.3);
}

.streak-calendar-title {
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
    opacity: 0.95;
    text-align: left;
}

.streak-calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
    margin-bottom: var(--spacing-sm);
}

.streak-calendar-day {
    aspect-ratio: 1;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: transform var(--transition-speed) ease;
    position: relative;
}

.streak-calendar-day:hover {
    transform: scale(1.1);
    z-index: 10;
}

/* Day states */
.streak-calendar-day.active {
    background: rgba(76,175,80,0.5);
    border: 2px solid #4CAF50;
}

.streak-calendar-day.inactive {
    background: rgba(255,255,255,0.1);
    border: 2px solid rgba(255,255,255,0.2);
}

.streak-calendar-day.today {
    background: rgba(255,193,7,0.5);
    border: 2px solid #FFC107;
    animation: pulse 1.5s infinite;
}

[data-theme="modern"] .streak-calendar-day.active {
    background: rgba(16,185,129,0.3);
    border-color: var(--success);
    box-shadow: 0 0 8px rgba(16,185,129,0.5);
}

[data-theme="modern"] .streak-calendar-day.inactive {
    background: rgba(31,41,55,0.5);
    border-color: rgba(107,114,128,0.3);
}

[data-theme="modern"] .streak-calendar-day.today {
    background: rgba(124,58,237,0.3);
    border-color: var(--primary);
    box-shadow: var(--glow-primary);
}

/* Calendar Labels */
.streak-calendar-labels {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
    font-size: 0.7rem;
    opacity: 0.8;
}

.streak-calendar-label {
    text-align: center;
}

/* Milestone Info */
.streak-milestone {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255,255,255,0.15);
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
}

[data-theme="modern"] .streak-milestone {
    background: rgba(124,58,237,0.2);
    border: 1px solid rgba(124,58,237,0.4);
}

.streak-milestone-icon {
    font-size: 1.3rem;
    margin-right: var(--spacing-xs);
}

/* Longest Streak Badge */
.streak-stats {
    display: flex;
    justify-content: space-around;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 2px solid rgba(255,255,255,0.2);
}

[data-theme="modern"] .streak-stats {
    border-color: rgba(124,58,237,0.3);
}

.streak-stat {
    text-align: center;
}

.streak-stat-value {
    font-size: 1.8rem;
    font-weight: var(--font-weight-bold);
    display: block;
    margin-bottom: 4px;
}

.streak-stat-label {
    font-size: 0.75rem;
    opacity: 0.85;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Freeze Display */
.streak-freezes {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    background: rgba(255,255,255,0.1);
    border-radius: var(--border-radius-sm);
}

[data-theme="modern"] .streak-freezes {
    background: rgba(15,23,42,0.5);
    border: 1px solid rgba(124,58,237,0.3);
}

.freeze-icon {
    font-size: 1.5rem;
    display: inline-block;
    margin: 0 4px;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
    transition: transform var(--transition-speed) ease;
}

.freeze-icon.available {
    animation: freeze-pulse 2s infinite;
}

.freeze-icon.empty {
    opacity: 0.3;
    filter: grayscale(100%);
}

.freeze-icon:hover {
    transform: scale(1.2) rotate(10deg);
}

@keyframes freeze-pulse {
    0%, 100% { 
        transform: scale(1);
        filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
    }
    50% { 
        transform: scale(1.1);
        filter: drop-shadow(0 0 10px rgba(100,200,255,0.6));
    }
}

.freeze-label {
    font-size: 0.85rem;
    opacity: 0.9;
    margin-top: var(--spacing-xs);
}

/* ============================================
   TASK-SPECIFIC STREAKS
   Display task streaks with bonus percentages
   ============================================ */

.task-streak-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: box-shadow 0.3s ease;
}

.task-streak-card:hover {
    box-shadow: var(--shadow-lg);
}

[data-theme="modern"] .task-streak-card {
    border: 1px solid rgba(var(--primary-rgb), 0.3);
}

[data-theme="modern"] .task-streak-card:hover {
    box-shadow: var(--glow-primary), var(--shadow-lg);
}

.task-streak-item {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s ease;
}

.task-streak-item:last-child {
    border-bottom: none;
}

.task-streak-item:hover {
    background: rgba(var(--primary-rgb), 0.05);
}

[data-theme="modern"] .task-streak-item:hover {
    background: rgba(var(--primary-rgb), 0.1);
}

.task-streak-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.task-streak-icon {
    font-size: 1.5rem;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
}

.task-streak-name {
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    font-size: 0.95rem;
}

.task-streak-days {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.task-streak-bonus {
    background: linear-gradient(135deg, #ff6b35, #f7931e);
    color: white;
    padding: 2px 8px;
    border-radius: 12px;
    font-weight: var(--font-weight-bold);
    font-size: 0.75rem;
    display: inline-flex;
    align-items: center;
    gap: 3px;
    box-shadow: 0 2px 4px rgba(255,107,53,0.3);
    animation: pulse-badge 2s infinite;
}

[data-theme="modern"] .task-streak-bonus {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    box-shadow: var(--glow-primary);
}

.task-streak-next {
    padding-left: calc(1.5rem + var(--spacing-sm));
    font-size: 0.8rem;
}

.task-streak-info-box {
    background: rgba(var(--primary-rgb), 0.1);
    border-left: 3px solid var(--primary);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
}

[data-theme="modern"] .task-streak-info-box {
    background: rgba(var(--primary-rgb), 0.15);
    border-color: var(--secondary);
    box-shadow: inset 0 0 10px rgba(var(--primary-rgb), 0.2);
}

/* Responsive */
@media (max-width: 768px) {
    .streak-count {
        font-size: 2.5rem;
    }
    
    .streak-flame.size-1 { font-size: 2.5rem; }
    .streak-flame.size-2 { font-size: 3rem; }
    .streak-flame.size-3 { font-size: 3.5rem; }
    .streak-flame.size-4 { font-size: 4rem; }
    .streak-flame.size-5 { font-size: 4.5rem; }
    
    .streak-calendar-grid {
        gap: 4px;
    }
    
    .freeze-icon {
        font-size: 1.2rem;
    }
    
    .task-streak-icon {
        font-size: 1.2rem;
    }
    
    .task-streak-name {
        font-size: 0.9rem;
    }
}