@import url('https://fonts.googleapis.com/css2?family=Heebo:wght@400;500;700&display=swap');

:root {
    --primary-color: #0d6efd;
    --background-light: #f8f9fa;
    --border-color: #dee2e6;
    --text-dark: #212529;
    --text-muted: #6c757d;
    --card-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --card-radius: 0.375rem;
}

body {
    font-family: 'Heebo', sans-serif;
    margin: 0;
    background-color: var(--background-light);
    direction: rtl;
}

.course-page-container {
    display: flex;
    flex-direction: row-reverse;
    max-width: 1400px;
    margin: 20px auto;
    padding: 0 20px;
    gap: 20px;
}

.main-content {
    flex-grow: 1;
    background-color: white;
    padding: 24px;
    border-radius: var(--card-radius);
    border: 1px solid var(--border-color);
}

.sidebar-nav {
    width: 350px;
    flex-shrink: 0;
}

.sidebar-nav h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.lessons-list .lesson-item {
    display: flex;
    align-items: center;
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: var(--card-radius);
    padding: 1rem;
    margin-bottom: 0.75rem;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    position: relative;
    overflow: hidden;
}

.lessons-list .lesson-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--card-shadow);
}

.lessons-list .lesson-item.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* === NEW STYLES FOR LOCKED LESSONS === */
.lessons-list .lesson-item.locked {
    background-color: #f8f9fa;
    opacity: 0.7;
    cursor: not-allowed;
}
.lessons-list .lesson-item.locked:hover {
    transform: none;
    box-shadow: none;
}
.lessons-list .lesson-item.locked .lesson-title {
    color: #999;
}


.lesson-item .lesson-info { flex-grow: 1; }
.lesson-item .lesson-title { font-weight: 500; margin: 0; }
.lesson-item .lesson-duration {
    font-size: 0.875rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 5px;
}
.lesson-item.active .lesson-duration { color: rgba(255, 255, 255, 0.8); }
.lesson-item .status-icon {
    font-size: 1.25rem;
    color: #198754;
    margin-left: 1rem;
}
.lesson-item.active .status-icon { color: white; }

.lesson-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}
.lesson-header h1 { margin-top: 0; margin-bottom: 0.5rem; }
.lesson-header p { color: var(--text-muted); font-size: 0.9rem; }
.status-badge {
    background-color: #e9ecef;
    padding: 0.35em 0.65em;
    border-radius: var(--card-radius);
    font-size: 0.8rem;
    font-weight: 500;
    visibility: hidden;
}
.status-badge.completed { visibility: visible; }

.video-container {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    background-color: #000;
    border-radius: var(--card-radius);
    overflow: hidden;
}
.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.lesson-navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}
.lesson-navigation button {
    padding: 0.75rem 1.5rem;
    border-radius: var(--card-radius);
    border: 1px solid var(--border-color);
    background-color: white;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}
.lesson-navigation button:hover { background-color: #f1f3f5; }
.lesson-navigation button:disabled { opacity: 0.5; cursor: not-allowed; }
.lesson-navigation .complete-btn { border-color: #198754; color: #198754; }
.lesson-navigation .complete-btn.is-completed { background-color: #198754; color: white; }

@media (max-width: 992px) {
    .course-page-container { flex-direction: column; }
    .sidebar-nav { width: 100%; }
}

.assignment-box {
    margin-top: 2rem;
    padding: 1.5rem;
    border: 1px solid #dee2e6;
    border-radius: 0.5rem;
    background-color: #f8f9fa;
}
.assignment-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #ccc;
    padding-bottom: 1rem;
    margin-bottom: 1rem;
}
.assignment-header h3 {
    margin: 0;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 10px;
}
.assignment-header .status-tag {
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.8rem;
    font-weight: 500;
    background-color: #e9ecef;
    color: #495057;
}
.assignment-instructions ul {
    background-color: #fff;
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    list-style-position: inside;
}
.assignment-submission-form textarea {
    width: 100%;
    min-height: 100px;
    padding: 0.75rem;
    border: 1px solid #ccc;
    border-radius: 0.5rem;
    margin-top: 1rem;
    box-sizing: border-box;
}
.assignment-submission-form .btn-submit {
    display: block;
    margin-top: 1rem;
    margin-right: auto;
    padding: 0.75rem 1.5rem;
    border: none;
    background-color: #0d6efd;
    color: white;
    border-radius: 0.5rem;
    cursor: pointer;
}
.assignment-submission-form .btn-submit:disabled {
    background-color: #6c757d;
    cursor: not-allowed;
}
.vat-note {
  font-size: 0.9rem;
  color: #777;
  margin-top: 4px;
}