/* Sadra course syllabus — lightweight, RTL-first and self-contained. */
.sadra-notes {
    --sn-bg: #fff;
    --sn-fg: #263247;
    --sn-muted: #7a8495;
    --sn-line: #e7eaf0;
    --sn-accent: #ff9800;
    --sn-accent-shadow: rgba(255, 152, 0, .24);
    direction: rtl;
    color: var(--sn-fg);
    background: var(--sn-bg);
    border: 1px solid var(--sn-line);
    border-radius: 18px;
    padding: 16px;
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    overscroll-behavior: contain;
    box-shadow: 0 10px 30px rgba(31, 42, 61, .08);
    font: inherit;
}
.sadra-notes::-webkit-scrollbar { width: 5px; }
.sadra-notes::-webkit-scrollbar-thumb { background: #cbd1dc; border-radius: 8px; }
.sadra-notes-title {
    font-size: 1.08em;
    font-weight: 750;
    text-align: center;
    margin: 0 0 14px;
    padding: 3px 4px 13px;
    border-bottom: 1px solid var(--sn-line);
}
.sadra-sections { display: grid; gap: 9px; }
.sadra-accordion-section {
    border: 1px solid var(--sn-line);
    border-radius: 12px;
    background: #fff;
    transition: border-color .2s ease, box-shadow .2s ease;
}
.sadra-accordion-section.is-open {
    border-color: rgba(255, 152, 0, .42);
    box-shadow: 0 3px 12px rgba(31, 42, 61, .045);
}
.sadra-section-toggle {
    width: 100%;
    min-height: 46px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 11px 13px;
    border: 0;
    background: #f8f9fb;
    color: inherit;
    text-align: right;
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    border-radius: 11px;
    transition: background-color .2s ease, color .2s ease;
}
.sadra-section-toggle:hover { background: #f1f3f7; }
.sadra-section-toggle:focus-visible,
.sadra-lesson-toggle:focus-visible,
.sadra-lesson-link:focus-visible { outline: 2px solid var(--sn-accent); outline-offset: 2px; }
.sadra-chevron {
    flex: 0 0 9px;
    width: 9px;
    height: 9px;
    margin-inline-start: 3px;
    border-left: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(-45deg);
    transition: transform .24s ease, color .2s ease;
    color: var(--sn-muted);
}
.sadra-accordion-section.is-open > .sadra-section-toggle { 
    background: #fff8ed; 
    color: #a85d00;
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}
.sadra-accordion-section.is-open > .sadra-section-toggle .sadra-chevron { transform: rotate(135deg); color: var(--sn-accent); }

/* Section Accordion Panel */
.sadra-section-content {
    box-sizing: border-box;
    display: none;
    padding: 7px 10px 10px;
}
.sadra-accordion-section.is-open > .sadra-section-content {
    display: block;
}

/* Lesson Accordion Panel */
.sadra-lesson-item {
    margin: 4px 0;
}
.sadra-lesson-toggle {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 10px;
    border: 0;
    background: transparent;
    color: #515d70;
    font: inherit;
    font-weight: 700;
    font-size: .95em;
    cursor: pointer;
    border-radius: 8px;
    transition: background-color .18s ease, color .18s ease;
}
.sadra-lesson-toggle:hover {
    background: #f8f9fb;
    color: #263247;
}
.sadra-lesson-item.is-open > .sadra-lesson-toggle .sadra-chevron {
    transform: rotate(135deg);
    color: var(--sn-accent);
}
.sadra-lesson-content {
    display: none;
    padding-inline-start: 12px;
}
.sadra-lesson-item.is-open > .sadra-lesson-content {
    display: block;
}

.sadra-lesson-group { padding: 7px 4px; }
.sadra-lesson-group + .sadra-lesson-group { border-top: 1px solid #f0f1f4; }
.sadra-lesson-label { font-weight: 700; margin: 3px 0 6px; color: #515d70; }
.sadra-lesson-link {
    box-sizing: border-box;
    display: flex;
    align-items: center;
    gap: .62rem;
    padding: .55rem .72rem;
    margin: 4px 0;
    border: 1px solid transparent;
    border-radius: 10px;
    color: #475266;
    text-align: right;
    text-decoration: none;
    font-size: .95em;
    line-height: 1.6;
    overflow-wrap: anywhere;
    transition: color .18s ease, background-color .18s ease, box-shadow .18s ease, transform .18s ease;
}
/* A small CSS book icon: no external image or icon-font request. */
.sadra-lesson-link::before {
    content: "";
    box-sizing: border-box;
    flex: 0 0 15px;
    width: 15px;
    height: 14px;
    margin-top: 1px;
    border: 1.5px solid #9aa4b4;
    border-radius: 3px 3px 2px 2px;
    background: linear-gradient(to left, transparent 45%, #9aa4b4 46%, #9aa4b4 54%, transparent 55%);
    opacity: .9;
}
.sadra-lesson-link:hover { background: #fff7eb; color: #b56500; }
.sadra-lesson-link.is-active {
    border-color: #ff9800;
    background: #ff9800;
    color: #fff;
    font-weight: 700;
    box-shadow: 0 4px 12px var(--sn-accent-shadow);
    transform: translateY(-1px);
}
.sadra-lesson-link.is-active::before {
    border-color: #fff;
    background: linear-gradient(to left, transparent 45%, #fff 46%, #fff 54%, transparent 55%);
}
.sadra-notes-notice { padding: 10px; border: 1px solid #ddd; border-radius: 10px; }
@media (prefers-reduced-motion: reduce) {
    .sadra-notes *, .sadra-notes *::before, .sadra-notes *::after { transition-duration: .01ms; }
}
@media (prefers-color-scheme: dark) {
    .sadra-notes { --sn-bg: #202631; --sn-fg: #edf1f7; --sn-muted: #a8b2c2; --sn-line: #394251; background: var(--sn-bg); box-shadow: 0 8px 25px rgba(0,0,0,.24); }
    .sadra-accordion-section { background: #242b37; }
    .sadra-section-toggle { background: #29313e; }
    .sadra-section-toggle:hover { background: #323b49; }
    .sadra-accordion-section.is-open > .sadra-section-toggle { background: #3b3023; color: #ffc266; }
    .sadra-lesson-label, .sadra-lesson-link { color: #d4dbe6; }
    .sadra-lesson-group + .sadra-lesson-group { border-color: #394251; }
    .sadra-lesson-link:hover { background: #3b3023; color: #ffc266; }
    .sadra-lesson-link.is-active { background: #ff9800; color: #fff; }
}