/* =====================================================
   Nova LMS — Public Stylesheet
   ===================================================== */

:root {
    --nova-primary:    #4f46e5;
    --nova-primary-dk: #3730a3;
    --nova-accent:     #10b981;
    --nova-danger:     #ef4444;
    --nova-bg:         #f8fafc;
    --nova-card:       #ffffff;
    --nova-border:     #e2e8f0;
    --nova-text:       #1e293b;
    --nova-muted:      #64748b;
    --nova-radius:     10px;
    --nova-shadow:     0 4px 24px rgba(0,0,0,.08);
}

/* ── Base ───────────────────────────────────────────── */
.nova-lms-wrap { font-family: 'Segoe UI', system-ui, sans-serif; color: var(--nova-text); }

/* ── Course Card ────────────────────────────────────── */
.nova-course-grid { display: grid; gap: 24px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); padding: 24px 0; }
.nova-course-card { background: var(--nova-card); border: 1px solid var(--nova-border); border-radius: var(--nova-radius); overflow: hidden; box-shadow: var(--nova-shadow); transition: transform .2s, box-shadow .2s; }
.nova-course-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,.12); }
.nova-course-card img { width: 100%; height: 180px; object-fit: cover; }
.nova-course-card-body { padding: 18px; }
.nova-course-card-title { font-size: 1.05rem; font-weight: 700; margin: 0 0 8px; }
.nova-course-card-meta { display: flex; gap: 12px; color: var(--nova-muted); font-size: .82rem; }
.nova-course-card-footer { display: flex; align-items: center; justify-content: space-between; padding: 12px 18px; border-top: 1px solid var(--nova-border); }
.nova-price { font-weight: 700; color: var(--nova-primary); font-size: 1.1rem; }
.nova-price.free { color: var(--nova-accent); }

/* ── Buttons ────────────────────────────────────────── */
.nova-btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 22px; border-radius: 8px; font-weight: 600; font-size: .9rem; cursor: pointer; border: none; transition: background .2s, transform .1s; text-decoration: none; }
.nova-btn:active { transform: scale(.97); }
.nova-btn-primary { background: var(--nova-primary); color: #fff; }
.nova-btn-primary:hover { background: var(--nova-primary-dk); }
.nova-btn-success { background: var(--nova-accent); color: #fff; }
.nova-btn-danger  { background: var(--nova-danger);  color: #fff; }
.nova-btn-outline { background: transparent; border: 2px solid var(--nova-primary); color: var(--nova-primary); }
.nova-btn-outline:hover { background: var(--nova-primary); color: #fff; }
.nova-btn-sm { padding: 6px 14px; font-size: .8rem; }
.nova-btn[disabled] { opacity: .5; cursor: not-allowed; }

/* ── Single Course ──────────────────────────────────── */
.nova-course-header { display: flex; flex-wrap: wrap; gap: 32px; padding: 32px; background: var(--nova-card); border-radius: var(--nova-radius); box-shadow: var(--nova-shadow); margin-bottom: 32px; }
.nova-course-header-info { flex: 1; min-width: 260px; }
.nova-course-header-sidebar { width: 300px; }
.nova-course-meta-row { display: flex; flex-wrap: wrap; gap: 16px; margin: 16px 0; }
.nova-course-meta-item { display: flex; align-items: center; gap: 6px; color: var(--nova-muted); font-size: .88rem; }
.nova-badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: .75rem; font-weight: 600; text-transform: capitalize; }
.nova-badge-beginner    { background: #dcfce7; color: #166534; }
.nova-badge-intermediate{ background: #fef9c3; color: #854d0e; }
.nova-badge-advanced    { background: #fee2e2; color: #991b1b; }

/* ── Curriculum Accordion ───────────────────────────── */
.nova-curriculum { margin: 24px 0; }
.nova-section-header { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; background: var(--nova-bg); border: 1px solid var(--nova-border); border-radius: 8px; cursor: pointer; font-weight: 600; margin-bottom: 4px; }
.nova-section-header:hover { background: #eef2ff; }
.nova-section-items { border: 1px solid var(--nova-border); border-radius: 0 0 8px 8px; overflow: hidden; margin-bottom: 12px; display: none; }
.nova-section-items.open { display: block; }
.nova-lesson-row { display: flex; align-items: center; padding: 12px 18px; gap: 12px; border-bottom: 1px solid var(--nova-border); font-size: .9rem; }
.nova-lesson-row:last-child { border-bottom: none; }
.nova-lesson-row.completed { color: var(--nova-accent); }
.nova-lesson-icon { width: 22px; height: 22px; display: flex; align-items: center; justify-content: center; border-radius: 50%; font-size: .75rem; }
.nova-lesson-icon.video { background: #e0f2fe; color: #0369a1; }
.nova-lesson-icon.text  { background: #f0fdf4; color: #166534; }
.nova-lesson-icon.quiz  { background: #fef9c3; color: #854d0e; }

/* ── Progress Bar ───────────────────────────────────── */
.nova-progress-wrap { margin: 16px 0; }
.nova-progress-label { display: flex; justify-content: space-between; font-size: .82rem; color: var(--nova-muted); margin-bottom: 6px; }
.nova-progress-bar { height: 8px; background: var(--nova-border); border-radius: 10px; overflow: hidden; }
.nova-progress-fill { height: 100%; background: var(--nova-accent); border-radius: 10px; transition: width .5s ease; }

/* ── Quiz ───────────────────────────────────────────── */
.nova-quiz-wrap { background: var(--nova-card); border-radius: var(--nova-radius); padding: 32px; box-shadow: var(--nova-shadow); }
.nova-question { margin-bottom: 28px; padding-bottom: 28px; border-bottom: 1px solid var(--nova-border); }
.nova-question:last-child { border-bottom: none; }
.nova-question-text { font-weight: 600; margin-bottom: 14px; }
.nova-answer-option { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border: 2px solid var(--nova-border); border-radius: 8px; margin-bottom: 8px; cursor: pointer; transition: border-color .15s, background .15s; }
.nova-answer-option:hover { border-color: var(--nova-primary); background: #eef2ff; }
.nova-answer-option.selected { border-color: var(--nova-primary); background: #eef2ff; }
.nova-answer-option.correct  { border-color: var(--nova-accent);  background: #dcfce7; }
.nova-answer-option.incorrect { border-color: var(--nova-danger); background: #fee2e2; }

/* ── Dashboard ──────────────────────────────────────── */
.nova-dashboard { display: grid; grid-template-columns: 240px 1fr; gap: 24px; min-height: 80vh; }
.nova-dashboard-sidebar { background: var(--nova-card); border-radius: var(--nova-radius); padding: 24px; box-shadow: var(--nova-shadow); }
.nova-dashboard-nav a { display: flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: 8px; color: var(--nova-muted); text-decoration: none; font-weight: 500; transition: background .15s, color .15s; margin-bottom: 4px; }
.nova-dashboard-nav a:hover, .nova-dashboard-nav a.active { background: #eef2ff; color: var(--nova-primary); }
.nova-dashboard-content { background: var(--nova-card); border-radius: var(--nova-radius); padding: 32px; box-shadow: var(--nova-shadow); }
.nova-stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 16px; margin-bottom: 32px; }
.nova-stat-card { background: var(--nova-bg); border-radius: 8px; padding: 20px; text-align: center; }
.nova-stat-card .value { font-size: 2rem; font-weight: 800; color: var(--nova-primary); }
.nova-stat-card .label { color: var(--nova-muted); font-size: .82rem; }

/* ── Course Builder ─────────────────────────────────── */
.nova-builder { display: grid; grid-template-columns: 1fr 340px; gap: 24px; }
.nova-builder-main { background: var(--nova-card); border-radius: var(--nova-radius); padding: 32px; box-shadow: var(--nova-shadow); }
.nova-builder-sidebar { position: sticky; top: 24px; align-self: start; }
.nova-builder-section { border: 1px solid var(--nova-border); border-radius: 8px; margin-bottom: 16px; overflow: hidden; }
.nova-builder-section-header { display: flex; align-items: center; gap: 12px; padding: 12px 16px; background: var(--nova-bg); font-weight: 600; }
.nova-builder-lesson-item { display: flex; align-items: center; gap: 10px; padding: 10px 16px; border-top: 1px solid var(--nova-border); font-size: .9rem; cursor: grab; }
.nova-builder-lesson-item:hover { background: #f8fafc; }
.nova-sort-handle { color: var(--nova-muted); cursor: grab; }
.nova-form-group { margin-bottom: 18px; }
.nova-form-label { display: block; font-weight: 600; font-size: .88rem; margin-bottom: 6px; }
.nova-input, .nova-select, .nova-textarea { width: 100%; padding: 10px 14px; border: 1.5px solid var(--nova-border); border-radius: 8px; font-size: .9rem; transition: border-color .15s; }
.nova-input:focus, .nova-select:focus, .nova-textarea:focus { outline: none; border-color: var(--nova-primary); }
.nova-textarea { min-height: 120px; resize: vertical; }

/* ── Certificate ────────────────────────────────────── */
.nova-certificate { max-width: 800px; margin: 0 auto; padding: 48px; border: 12px double var(--nova-primary); border-radius: 16px; text-align: center; background: linear-gradient(135deg, #fff 0%, #f0f4ff 100%); }
.nova-certificate h1 { font-size: 2.5rem; color: var(--nova-primary); margin-bottom: 8px; }
.nova-certificate .recipient { font-size: 2rem; font-weight: 700; color: var(--nova-text); margin: 24px 0 8px; }
.nova-certificate .course-name { font-size: 1.3rem; color: var(--nova-primary); font-style: italic; }
.nova-certificate .issued { color: var(--nova-muted); margin-top: 24px; font-size: .9rem; }
.nova-certificate .seal { font-size: 64px; margin: 24px 0; }

/* ── Alerts / Notices ───────────────────────────────── */
.nova-notice { padding: 14px 18px; border-radius: 8px; margin: 16px 0; font-size: .9rem; }
.nova-notice-success { background: #dcfce7; color: #166534; border-left: 4px solid var(--nova-accent); }
.nova-notice-error   { background: #fee2e2; color: #991b1b; border-left: 4px solid var(--nova-danger); }
.nova-notice-info    { background: #e0f2fe; color: #0369a1; border-left: 4px solid #0ea5e9; }

/* ── Responsive ─────────────────────────────────────── */
@media (max-width: 768px) {
    .nova-dashboard { grid-template-columns: 1fr; }
    .nova-builder    { grid-template-columns: 1fr; }
    .nova-course-header-sidebar { width: 100%; }
}