/* Progress tracking & gamification */

/* ─── Completion celebration on stepper ─── */

.stepper-completed {
    border-color: #5cb85c;
    animation: stepper-celebrate 0.6s ease;
}

@keyframes stepper-celebrate {
    0% { border-color: var(--border); }
    30% { border-color: #5cb85c; box-shadow: 0 0 20px rgba(92, 184, 92, 0.3); }
    60% { box-shadow: 0 0 30px rgba(92, 184, 92, 0.15); }
    100% { border-color: #5cb85c; box-shadow: none; }
}

.stepper-completed .goal-qed-symbol {
    animation: qed-bounce 0.5s ease 0.1s;
}

@keyframes qed-bounce {
    0% { transform: scale(1); }
    40% { transform: scale(1.4); }
    70% { transform: scale(0.9); }
    100% { transform: scale(1); }
}

/* ─── Exercise list badges ─── */

.ex-badge {
    margin-left: auto;
    font-size: 1rem;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    flex-shrink: 0;
}

.ex-badge-complete {
    background: #5cb85c;
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
}

.ex-badge-visited {
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Override difficulty display when badge is present */
.exercise-list a:has(.ex-badge) .ex-difficulty {
    margin-left: 0;
}

/* ─── Track progress bar ─── */

.track-progress {
    margin-bottom: 2rem;
}

.track-progress-bar {
    height: 6px;
    background: var(--border);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.4rem;
}

.track-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #5cb85c);
    border-radius: 3px;
    transition: width 0.5s ease;
    min-width: 0;
}

.track-progress-label {
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* ─── Streak display ─── */

.streak-display {
    text-align: center;
    margin-top: 1.5rem;
    font-family: var(--mono);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.streak-fire {
    font-size: 1.1rem;
}

/* ─── Homepage track card progress ─── */

.track-card .track-status {
    transition: all 0.2s;
}