/* ============================================================
   QUICK WIN ADDITIONS — Breadcrumb + Progress Bar + Search Hint
   ============================================================ */

/* --- Breadcrumb Navigation --- */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono, 'JetBrains Mono', monospace);
    font-size: 0.75rem;
    color: var(--text-secondary, #a1a1aa);
    margin-bottom: 20px;
    padding: 6px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.breadcrumb .bc-home {
    color: var(--accent-color, #00f0ff);
    transition: opacity 0.15s ease;
    letter-spacing: 0.05em;
}

.breadcrumb .bc-home:hover {
    opacity: 0.75;
    text-decoration: underline;
}

.breadcrumb .bc-sep {
    color: rgba(255, 255, 255, 0.2);
    font-size: 1rem;
    line-height: 1;
}

.breadcrumb .bc-active {
    color: var(--text-primary, #e4e4e7);
    letter-spacing: 0.02em;
    text-transform: uppercase;
    font-size: 0.7rem;
}

/* --- Course Progress Bar --- */
.course-progress-bar {
    margin-top: 6px;
    height: 2px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 1px;
    overflow: hidden;
    width: 100%;
    max-width: 200px;
}

.course-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color, #00f0ff), rgba(0, 240, 255, 0.4));
    border-radius: 1px;
    transition: width 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 0 6px rgba(0, 240, 255, 0.4);
}

/* Zero-progress bar: hide it entirely */
.course-progress-fill[style="width:0%"] {
    display: none;
}

/* --- Search Hint --- */
.search-hint {
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.search-hint:hover {
    opacity: 1;
}

/* --- Return Button: improved arrow --- */
.return-btn-style {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}