/* ── Module grid ─────────────────────────────────────────────── */
.learn-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    margin-bottom: 1.5rem;
}

.module-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 1.4rem 1.4rem;
    cursor: pointer;
    transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
    position: relative;
    overflow: hidden;
}
.module-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 50px var(--card-shadow);
    border-color: var(--card-hover-border);
}
.module-card .mod-icon {
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
    display: block;
}
.module-card .mod-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--heading);
    margin: 0 0 0.3rem;
}
.module-card .mod-desc {
    color: var(--muted);
    font-size: 0.88rem;
    line-height: 1.5;
    margin: 0;
}
.module-card .mod-meta {
    display: flex;
    gap: 0.6rem;
    margin-top: 0.6rem;
    flex-wrap: wrap;
}
.mod-tag {
    display: inline-block;
    padding: 0.15rem 0.55rem;
    border-radius: 999px;
    font-size: 0.72rem;
    font-weight: 600;
    background: rgba(96,165,250,0.12);
    color: var(--accent);
}
.mod-tag.lessons { background: rgba(34,197,94,0.12); color: #16a34a; }
.mod-tag.test    { background: rgba(168,85,247,0.12); color: #a855f7; }

/* ── Module detail view ─────────────────────────────────────── */
.learn-detail { max-width: 720px; }

.learn-back {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--muted);
    font-size: 0.9rem;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    margin-bottom: 1rem;
    transition: color 120ms;
}
.learn-back:hover { color: var(--accent); }

/* ── Lesson accordion ───────────────────────────────────────── */
.lesson-list { display: flex; flex-direction: column; gap: 0.6rem; }

.lesson-item {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color 200ms ease;
}
.lesson-item.active { border-color: var(--card-hover-border); }

.lesson-header {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1rem 1.2rem;
    cursor: pointer;
    transition: background 120ms;
}
.lesson-header:hover { background: rgba(96,165,250,0.04); }

.lesson-num {
    width: 2rem;
    height: 2rem;
    min-width: 2rem;
    background: var(--accent-strong);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85rem;
    color: #fff;
}
.lesson-num.completed {
    background: var(--success);
}

.lesson-title {
    flex: 1;
    font-weight: 600;
    color: var(--heading);
    font-size: 0.95rem;
}

.lesson-chevron {
    color: var(--muted);
    transition: transform 200ms ease;
    font-size: 1.1rem;
}
.lesson-item.active .lesson-chevron { transform: rotate(180deg); }

.lesson-body {
    display: none;
    padding: 0 1.2rem 1.2rem;
}
.lesson-item.active .lesson-body { display: block; }

.lesson-content {
    color: var(--text);
    line-height: 1.7;
    font-size: 0.92rem;
}
.lesson-content p { margin: 0 0 0.8rem; }
.lesson-content strong { color: var(--heading); }
.lesson-content ul {
    padding-left: 1.2rem;
    margin: 0.5rem 0;
}
.lesson-content li {
    margin-bottom: 0.35rem;
    color: var(--muted);
}
.lesson-content .highlight-box {
    background: rgba(96,165,250,0.08);
    border-left: 3px solid var(--accent);
    padding: 0.7rem 1rem;
    border-radius: 0 8px 8px 0;
    margin: 0.8rem 0;
    font-size: 0.88rem;
}
.lesson-content .warning-box {
    background: rgba(239,68,68,0.08);
    border-left: 3px solid var(--danger);
    padding: 0.7rem 1rem;
    border-radius: 0 8px 8px 0;
    margin: 0.8rem 0;
    font-size: 0.88rem;
}

.lesson-done-btn {
    margin-top: 0.8rem;
    background: rgba(34,197,94,0.12);
    border: 1px solid rgba(34,197,94,0.3);
    color: #16a34a;
    padding: 0.5rem 1rem;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 140ms;
}
.lesson-done-btn:hover { background: rgba(34,197,94,0.2); }
.lesson-done-btn.is-done {
    opacity: 0.6;
    cursor: default;
}

/* ── Mini test ──────────────────────────────────────────────── */
.mini-test-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--card-border);
}

.mini-test-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 1.2rem 1.4rem;
    margin-bottom: 1rem;
}

.mini-q-text {
    font-weight: 600;
    color: var(--heading);
    font-size: 0.95rem;
    margin: 0 0 0.8rem;
    line-height: 1.5;
}

.mini-options { display: flex; flex-direction: column; gap: 0.4rem; }

.mini-option {
    background: var(--bar-track);
    border: 1px solid var(--card-border);
    color: var(--text);
    padding: 0.6rem 0.9rem;
    border-radius: 8px;
    text-align: left;
    cursor: pointer;
    font-size: 0.88rem;
    transition: background 120ms, border-color 120ms, transform 80ms;
}
.mini-option:hover:not(:disabled) {
    background: rgba(96,165,250,0.08);
    border-color: rgba(96,165,250,0.3);
    transform: translateX(2px);
}
.mini-option:disabled { cursor: default; }
.mini-option.correct { background: rgba(34,197,94,0.15) !important; border-color: #22c55e !important; color: #16a34a !important; }
.mini-option.wrong   { background: rgba(239,68,68,0.12) !important; border-color: #ef4444 !important; color: #dc2626 !important; }

.mini-feedback {
    margin-top: 0.5rem;
    padding: 0.6rem 0.8rem;
    border-radius: 8px;
    font-size: 0.85rem;
    line-height: 1.5;
    display: none;
}
.mini-feedback.show { display: block; }
.mini-feedback.correct-fb { background: rgba(34,197,94,0.08); border-left: 3px solid #22c55e; }
.mini-feedback.wrong-fb   { background: rgba(239,68,68,0.08); border-left: 3px solid #ef4444; }

.mini-test-result {
    text-align: center;
    padding: 1.5rem;
}
.mini-test-result .result-score {
    font-size: 2rem;
    font-weight: 700;
    color: var(--heading);
    margin-bottom: 0.3rem;
}
.mini-test-result .result-msg {
    color: var(--muted);
    font-size: 0.95rem;
}

/* ── Progress bar for module ────────────────────────────────── */
.module-progress {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 1rem;
}
.module-progress-track {
    flex: 1;
    background: var(--bar-track);
    border-radius: 999px;
    height: 8px;
    overflow: hidden;
}
.module-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--success), #4ade80);
    border-radius: 999px;
    transition: width 400ms ease;
}
.module-progress-text {
    font-size: 0.82rem;
    color: var(--muted);
    min-width: 70px;
    text-align: right;
}

@media (max-width: 600px) {
    .learn-grid { grid-template-columns: 1fr; }
    .learn-detail { max-width: 100%; }
}