/* ═══════════════════════════════════════════════════
   Platform Pages — Login / Platform / Admin
   Uses same design system as main site (Cairo font,
   dark theme, lime-green #a7ff0d accent)
   ═══════════════════════════════════════════════════ */

:root {
    --primary:       #a7ff0d;
    --primary-dark:  #8bcc00;
    --primary-light: rgba(167, 255, 13, 0.1);
    --bg-main:       #111827;
    --bg-light:      #1f2937;
    --bg-card:       #162032;
    --text-main:     #f3f4f6;
    --text-muted:    #9ca3af;
    --border-color:  #374151;
    --danger:        #ef4444;
    --success:       #10b981;
    --radius-md:     8px;
    --radius-lg:     16px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Cairo', sans-serif;
    background: var(--bg-main);
    color: var(--text-main);
    min-height: 100vh;
    direction: rtl;
}

/* ══════════════════════════════════════
   LOGIN PAGE
   ══════════════════════════════════════ */
.login-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background-image: radial-gradient(ellipse at 50% -10%, rgba(167,255,13,.12) 0%, transparent 65%);
}

.login-container {
    width: 100%;
    max-width: 440px;
    padding: 24px;
}

.login-logo {
    text-align: center;
    margin-bottom: 28px;
}

.login-avatar {
    width: 84px;
    height: 84px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary);
    margin-bottom: 12px;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.login-logo h1 {
    font-size: 1.4rem;
    font-weight: 800;
}

.login-logo p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 4px;
}

.login-card {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.login-card h2 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
    text-align: center;
}

.login-hint {
    color: var(--text-muted);
    font-size: 0.825rem;
    margin-bottom: 22px;
    text-align: center;
}

.input-group { margin-bottom: 14px; }

.input-group input {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-main);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-family: 'Cairo', sans-serif;
    font-size: 1.1rem;
    text-align: center;
    letter-spacing: 3px;
    transition: border-color .2s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.input-group input::placeholder {
    letter-spacing: 1px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.error-msg {
    color: var(--danger);
    font-size: 0.825rem;
    margin-bottom: 12px;
    text-align: center;
    padding: 10px;
    background: rgba(239,68,68,.08);
    border: 1px solid rgba(239,68,68,.2);
    border-radius: var(--radius-md);
}

.btn-primary {
    width: 100%;
    padding: 13px;
    background: var(--primary);
    color: #000;
    border: none;
    border-radius: var(--radius-md);
    font-family: 'Cairo', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: background .2s, transform .1s;
}

.btn-primary:hover  { background: var(--primary-dark); }
.btn-primary:active { transform: scale(.98); }
.btn-primary:disabled { opacity: .55; cursor: not-allowed; }

.back-link {
    display: block;
    text-align: center;
    margin-top: 18px;
    color: var(--text-muted);
    font-size: 0.85rem;
    transition: color .2s;
}
.back-link:hover { color: var(--primary); }

/* ══════════════════════════════════════
   PLATFORM HEADER
   ══════════════════════════════════════ */
.platform-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 28px;
    background: var(--bg-light);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    height: 62px;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: .95rem;
}

.header-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary);
}

.header-student {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: .875rem;
    color: var(--text-muted);
}

.header-student strong { color: var(--primary); }

.btn-logout {
    padding: 6px 16px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    font-family: 'Cairo', sans-serif;
    font-size: .85rem;
    cursor: pointer;
    transition: all .2s;
}
.btn-logout:hover { border-color: var(--danger); color: var(--danger); }

/* ══════════════════════════════════════
   PLATFORM LAYOUT
   ══════════════════════════════════════ */
.platform-layout {
    display: grid;
    grid-template-columns: 270px 1fr;
    height: calc(100vh - 62px);
    overflow: hidden;
}

/* Sidebar */
.platform-sidebar {
    background: var(--bg-light);
    border-left: 1px solid var(--border-color);
    padding: 20px 16px;
    overflow-y: auto;
}

.sidebar-title {
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    margin-bottom: 14px;
    padding-right: 4px;
    font-weight: 600;
}

.course-tab {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 14px;
    border-radius: var(--radius-md);
    cursor: pointer;
    margin-bottom: 5px;
    transition: all .2s;
    border: 1px solid transparent;
    font-size: .9rem;
}

.course-tab:hover {
    background: var(--bg-card);
    border-color: var(--border-color);
}

.course-tab.active {
    background: var(--primary-light);
    border-color: var(--primary);
    color: var(--primary);
    font-weight: 700;
}

.course-icon { font-size: 1rem; flex-shrink: 0; }

.course-tab-name { flex: 1; }

.lesson-count {
    font-size: .7rem;
    color: var(--text-muted);
    background: var(--bg-main);
    padding: 2px 8px;
    border-radius: 20px;
    white-space: nowrap;
    flex-shrink: 0;
}

.course-tab.active .lesson-count {
    background: var(--primary);
    color: #000;
}

/* Main content */
.platform-main {
    overflow-y: auto;
    padding: 24px 28px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    min-height: 0;
}

#playerArea {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.current-lesson-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-main);
}

/* Video player */
.video-wrapper {
    position: relative;
    background: #000;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 16 / 9;
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 32px rgba(0,0,0,.5);
}

.video-watermark {
    position: absolute;
    pointer-events: none;
    color: rgba(255,255,255,0.35);
    font-size: .85rem;
    font-weight: 700;
    letter-spacing: 1px;
    white-space: nowrap;
    text-shadow: 0 1px 4px rgba(0,0,0,.9);
    transition: left 3s ease, top 3s ease;
    z-index: 10;
    user-select: none;
    top: 10px;
    left: 10px;
}

.lessons-list-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}
.progress-count {
    font-size: .8rem;
    color: var(--primary);
    font-weight: 700;
}
.btn-resume {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    background: var(--primary);
    color: #000;
    border: none;
    border-radius: 10px;
    font-family: 'Cairo', sans-serif;
    font-size: .9rem;
    font-weight: 700;
    cursor: pointer;
    transition: opacity .2s;
}
.btn-resume:hover { opacity: .85; }
.lesson-item.watched { opacity: .75; }
.lesson-item.watched .lesson-name { text-decoration: line-through; text-decoration-color: var(--primary); }

.no-video-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    gap: 14px;
    color: var(--text-muted);
}

.no-video-placeholder .play-big {
    font-size: 3.5rem;
    opacity: .2;
}

.no-video-placeholder p {
    font-size: .9rem;
    opacity: .6;
}

#videoPlayer {
    width: 100%;
    height: 100%;
    display: block;
    background: #000;
}

/* Lessons list */
.lessons-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.lessons-list-title {
    font-size: .78rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-muted);
    margin-bottom: 6px;
    font-weight: 600;
}

.lesson-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all .2s;
}

.lesson-item:hover {
    border-color: var(--primary);
    background: var(--primary-light);
}

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

.lesson-num {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-main);
    border-radius: 50%;
    font-size: .78rem;
    font-weight: 700;
    flex-shrink: 0;
    color: var(--text-muted);
}

.lesson-item.active .lesson-num {
    background: var(--primary);
    color: #000;
}

.lesson-item:hover .lesson-num {
    background: var(--primary-light);
    color: var(--primary);
}

.lesson-name {
    flex: 1;
    font-size: .9rem;
}

.lesson-item.active .lesson-name { color: var(--primary); font-weight: 600; }

.play-icon { opacity: .3; font-size: .8rem; }
.lesson-item:hover .play-icon,
.lesson-item.active .play-icon { opacity: 1; color: var(--primary); }

.no-content {
    color: var(--text-muted);
    text-align: center;
    padding: 24px;
    font-size: .875rem;
}

/* ══════════════════════════════════════
   ADMIN PAGE
   ══════════════════════════════════════ */
.admin-gate {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.admin-gate .login-card { max-width: 400px; margin: auto; }
.admin-gate .login-card h2 { margin-bottom: 18px; text-align: center; }
.admin-gate .input-group input { letter-spacing: 0; text-align: right; font-size: .95rem; }

.admin-layout {
    padding: 28px;
    max-width: 1100px;
    margin: 0 auto;
}

.admin-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.admin-tab {
    padding: 10px 22px;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--text-muted);
    font-family: 'Cairo', sans-serif;
    font-size: .9rem;
    cursor: pointer;
    transition: all .2s;
    margin-bottom: -1px;
}

.admin-tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 700;
}

.admin-tab:hover:not(.active) { color: var(--text-main); }

.admin-section {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 20px;
}

.admin-section h3 {
    font-size: .95rem;
    font-weight: 700;
    margin-bottom: 18px;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Add student form */
.add-student-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
    max-width: 520px;
}

.add-student-form input[type="text"],
.upload-form select,
.upload-form input[type="text"] {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-main);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-family: 'Cairo', sans-serif;
    font-size: .95rem;
    text-align: right;
    transition: border-color .2s;
}

.add-student-form input:focus,
.upload-form select:focus,
.upload-form input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.upload-form select option { background: var(--bg-light); }

.courses-checkboxes {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.courses-checkboxes label {
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    font-size: .85rem;
    padding: 7px 14px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    transition: all .2s;
    user-select: none;
}

.courses-checkboxes label:has(input:checked) {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}

.courses-checkboxes input[type="checkbox"] {
    accent-color: var(--primary);
    width: 15px;
    height: 15px;
    cursor: pointer;
}

/* Students table */
.table-wrapper { overflow-x: auto; }

.students-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .875rem;
}

.students-table th {
    text-align: right;
    padding: 10px 14px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    font-size: .78rem;
    text-transform: uppercase;
    letter-spacing: .5px;
    white-space: nowrap;
}

.students-table td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
}

.students-table tr.inactive td { opacity: .45; }

.students-table tr:last-child td { border-bottom: none; }

.code-cell {
    font-family: 'Courier New', monospace;
    background: var(--bg-main);
    padding: 4px 10px;
    border-radius: 6px;
    letter-spacing: 1.5px;
    font-size: .85rem;
    color: var(--primary);
    border: 1px solid var(--border-color);
}

.btn-copy {
    margin-right: 8px;
    padding: 4px 10px;
    background: transparent;
    border: 1px solid var(--primary);
    border-radius: 6px;
    color: var(--primary);
    cursor: pointer;
    font-family: 'Cairo', sans-serif;
    font-size: .75rem;
    transition: all .2s;
}
.btn-copy:hover { background: var(--primary); color: #000; }

.status-badge {
    padding: 3px 10px;
    border-radius: 20px;
    font-size: .75rem;
    font-weight: 700;
    white-space: nowrap;
}

.status-badge.active {
    background: rgba(16,185,129,.1);
    color: var(--success);
    border: 1px solid rgba(16,185,129,.3);
}

.status-badge.inactive {
    background: rgba(239,68,68,.08);
    color: var(--danger);
    border: 1px solid rgba(239,68,68,.2);
}

.btn-toggle, .btn-delete, .btn-edit-courses {
    padding: 5px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-family: 'Cairo', sans-serif;
    font-size: .78rem;
    transition: all .2s;
    margin-left: 4px;
    border: 1px solid;
}

.btn-toggle {
    background: transparent;
    border-color: var(--border-color);
    color: var(--text-muted);
}
.btn-toggle:hover { border-color: var(--primary); color: var(--primary); }

.btn-delete {
    background: transparent;
    border-color: var(--danger);
    color: var(--danger);
}
.btn-delete:hover { background: var(--danger); color: #fff; }

.btn-edit-courses {
    background: transparent;
    border-color: #4a9eff;
    color: #4a9eff;
}
.btn-edit-courses:hover { background: #4a9eff; color: #fff; }

.btn-reset-device {
    background: transparent;
    border-color: #f59e0b;
    color: #f59e0b;
}
.btn-reset-device:hover { background: #f59e0b; color: #fff; }

.empty-table {
    text-align: center;
    color: var(--text-muted);
    padding: 28px;
    font-size: .875rem;
}

/* Upload form */
.upload-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 520px;
}

.file-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px 24px;
    text-align: center;
    cursor: pointer;
    transition: all .25s;
}

.file-upload-area:hover {
    border-color: var(--primary);
    background: var(--primary-light);
}

.file-upload-area.has-file {
    border-color: var(--success);
    background: rgba(16,185,129,.06);
}

.upload-icon { font-size: 2.2rem; margin-bottom: 10px; }

.file-upload-area p {
    color: var(--text-muted);
    font-size: .875rem;
    margin-bottom: 4px;
}

.file-upload-area p.file-selected {
    color: var(--success);
    font-weight: 700;
}

.file-upload-area small {
    color: var(--text-muted);
    font-size: .75rem;
    opacity: .6;
}

.progress-container {
    background: var(--bg-main);
    border-radius: 20px;
    height: 34px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.progress-bar {
    height: 100%;
    background: var(--primary);
    color: #000;
    font-size: .8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: width .3s ease;
    min-width: 44px;
    width: 0%;
}

/* ══════════════════════════════════════
   REPLIES DRAWER
   ══════════════════════════════════════ */
.replies-drawer {
    position: fixed;
    top: 0;
    right: -420px;
    width: 420px;
    max-width: 95vw;
    height: 100vh;
    background: var(--bg-light);
    border-left: 1px solid var(--border-color);
    z-index: 500;
    display: flex;
    flex-direction: column;
    transition: right .35s cubic-bezier(.4,0,.2,1);
    box-shadow: -8px 0 32px rgba(0,0,0,.4);
}

.replies-drawer.open { right: 0; }

.drawer-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,.5);
    z-index: 499;
}
.drawer-overlay.open { display: block; }

.drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 20px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.drawer-header h3 { font-size: 1rem; font-weight: 700; }

.drawer-close {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-muted);
    width: 32px;
    height: 32px;
    cursor: pointer;
    font-size: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all .2s;
}
.drawer-close:hover { border-color: var(--danger); color: var(--danger); }

.replies-list {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.reply-card {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 14px 16px;
    border-right: 3px solid var(--border-color);
}

.reply-card.has-reply { border-right-color: var(--primary); }
.reply-card.new-reply { border-right-color: var(--success); }

.reply-card-video {
    font-size: .72rem;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.reply-card-question {
    font-size: .875rem;
    color: var(--text-main);
    margin-bottom: 8px;
    line-height: 1.6;
}

.reply-card-date {
    font-size: .7rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.reply-card-answer {
    margin-top: 10px;
    padding: 10px 14px;
    background: var(--primary-light);
    border-radius: 8px;
    border-right: 2px solid var(--primary);
}

.reply-card-answer-label {
    font-size: .7rem;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 4px;
}

.reply-card-answer p { font-size: .875rem; line-height: 1.6; }

.reply-card-pending {
    font-size: .75rem;
    color: var(--text-muted);
    padding: 6px 0 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Replies button in header */
.btn-replies {
    position: relative;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-main);
    width: 38px;
    height: 38px;
    font-size: 1.1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all .2s;
}
.btn-replies:hover { border-color: var(--primary); }

.replies-badge {
    position: absolute;
    top: -6px;
    left: -6px;
    background: var(--success);
    color: #000;
    font-size: .65rem;
    font-weight: 900;
    min-width: 18px;
    height: 18px;
    border-radius: 9px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 4px;
    font-family: 'Cairo', sans-serif;
}

/* ══════════════════════════════════════
   WELCOME SCREEN
   ══════════════════════════════════════ */
.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}

.welcome-icon { font-size: 4rem; margin-bottom: 16px; opacity: .4; }

.welcome-screen h2 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 8px;
}

.welcome-screen p { font-size: .875rem; }

/* ══════════════════════════════════════
   NOTES & QUESTIONS SECTION
   ══════════════════════════════════════ */
.notes-section {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
}

.notes-header { margin-bottom: 16px; }

.notes-header h3 {
    font-size: .95rem;
    font-weight: 700;
    margin-bottom: 4px;
}

.notes-header p {
    font-size: .78rem;
    color: var(--text-muted);
}

.notes-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 16px;
}

.note-item {
    padding: 12px 16px;
    background: var(--bg-main);
    border-radius: 10px;
    border-right: 3px solid var(--border-color);
}

.note-item.has-reply { border-right-color: var(--primary); }

.note-text {
    font-size: .9rem;
    margin-bottom: 6px;
    line-height: 1.6;
}

.note-meta {
    font-size: .72rem;
    color: var(--text-muted);
}

.note-reply {
    margin-top: 10px;
    padding: 10px 14px;
    background: var(--primary-light);
    border-radius: 8px;
    border-right: 2px solid var(--primary);
}

.note-reply-label {
    font-size: .72rem;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 4px;
}

.note-reply p { font-size: .875rem; line-height: 1.6; }

.add-note-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.add-note-form textarea {
    width: 100%;
    padding: 12px 14px;
    background: var(--bg-main);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-family: 'Cairo', sans-serif;
    font-size: .9rem;
    resize: vertical;
    min-height: 80px;
    transition: border-color .2s;
}

.add-note-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

/* ══════════════════════════════════════
   ADMIN QUESTIONS LIST
   ══════════════════════════════════════ */
.q-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--danger);
    color: #fff;
    font-size: .65rem;
    font-weight: 700;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    margin-right: 4px;
}

.question-card {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 16px 20px;
    margin-bottom: 12px;
    transition: border-color .2s;
}

.question-card:hover { border-color: var(--primary); }
.question-card.replied { border-right: 3px solid var(--primary); }

.question-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 10px;
}

.q-student {
    font-weight: 700;
    font-size: .9rem;
    color: var(--primary);
}

.q-course-tag {
    font-size: .72rem;
    background: var(--primary-light);
    color: var(--primary);
    padding: 2px 10px;
    border-radius: 20px;
    border: 1px solid var(--primary);
}

.q-video-tag {
    font-size: .72rem;
    color: var(--text-muted);
    background: var(--bg-light);
    padding: 2px 10px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.q-date {
    font-size: .7rem;
    color: var(--text-muted);
    margin-right: auto;
}

.question-text {
    font-size: .9rem;
    line-height: 1.7;
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.existing-reply {
    padding: 10px 14px;
    background: var(--primary-light);
    border-radius: 8px;
    border-right: 2px solid var(--primary);
    margin-bottom: 10px;
    font-size: .875rem;
}

.existing-reply-label {
    font-size: .7rem;
    color: var(--primary);
    font-weight: 700;
    margin-bottom: 4px;
}

.reply-form {
    display: flex;
    gap: 8px;
    align-items: flex-start;
}

.reply-form textarea {
    flex: 1;
    padding: 10px 12px;
    background: var(--bg-light);
    border: 1.5px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-main);
    font-family: 'Cairo', sans-serif;
    font-size: .875rem;
    resize: vertical;
    min-height: 60px;
    transition: border-color .2s;
}

.reply-form textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.btn-reply {
    padding: 10px 18px;
    background: var(--primary);
    color: #000;
    border: none;
    border-radius: 8px;
    font-family: 'Cairo', sans-serif;
    font-size: .85rem;
    font-weight: 700;
    cursor: pointer;
    white-space: nowrap;
    transition: background .2s;
}

.btn-reply:hover { background: var(--primary-dark); }

.btn-del-q {
    padding: 4px 10px;
    background: transparent;
    border: 1px solid var(--danger);
    border-radius: 6px;
    color: var(--danger);
    font-family: 'Cairo', sans-serif;
    font-size: .75rem;
    cursor: pointer;
    transition: all .2s;
}
.btn-del-q:hover { background: var(--danger); color: #fff; }

/* ══════════════════════════════════════
   TOAST
   ══════════════════════════════════════ */
.toast {
    position: fixed;
    bottom: 28px;
    right: 28px;
    padding: 13px 20px;
    border-radius: var(--radius-md);
    font-family: 'Cairo', sans-serif;
    font-weight: 600;
    font-size: .875rem;
    opacity: 0;
    transform: translateY(12px);
    transition: all .3s;
    z-index: 9999;
    max-width: 360px;
    box-shadow: 0 6px 24px rgba(0,0,0,.4);
    pointer-events: none;
}

.toast.show     { opacity: 1; transform: translateY(0); }
.toast-success  { background: var(--primary); color: #000; }
.toast-error    { background: var(--danger);  color: #fff; }

/* ══════════════════════════════════════
   RESPONSIVE
   ══════════════════════════════════════ */
@media (max-width: 768px) {
    .platform-layout {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr;
        height: auto;
        min-height: calc(100vh - 62px);
        overflow: visible;
    }

    .platform-sidebar {
        border-left: none;
        border-bottom: 1px solid var(--border-color);
        padding: 14px;
        display: flex;
        gap: 8px;
        overflow-x: auto;
        overflow-y: visible;
    }

    .sidebar-title { display: none; }

    .course-tab {
        flex-shrink: 0;
        flex-direction: column;
        padding: 10px 14px;
        text-align: center;
        gap: 4px;
        font-size: .8rem;
    }

    .lesson-count { margin-right: 0; }

    .platform-main  { padding: 16px; }
    .platform-header { padding: 10px 16px; }

    .admin-layout { padding: 16px; }

    .courses-checkboxes label { font-size: .8rem; padding: 6px 10px; }
}