/* ============ RESET & BASE ============ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #1A8FA0;
    --primary-hover: #168191;
    --accent: #F26522;
    --accent-hover: #e05515;
    --text-primary: #1A2E35;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --bg-primary: #E8F6F8;
    --bg-secondary: #ffffff;
    --bg-tertiary: #FEF0E8;
    --bg-hover: #e0f2f5;
    --border-color: #d1e7eb;
    --success: #3fb950;
    --danger: #f85149;
    --warning: #d29922;
    --sidebar-width: 260px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
}

.login-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
}

.login-box h1 {
    color: var(--primary);
    font-size: 2rem;
    margin-bottom: 8px;
}

.login-subtitle {
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 0.9rem;
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-form label {
    display: block;
    margin-bottom: 6px;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.login-form input {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: border-color 0.2s;
}

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

.error-message {
    color: var(--danger);
    margin-top: 12px;
    font-size: 0.85rem;
}

.login-hint {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.hidden {
    display: none !important;
}

/* ============ LOGIN ============ */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.login-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 40px;
    width: 100%;
    max-width: 400px;
}

.login-logo {
    text-align: center;
    margin-bottom: 8px;
}

.login-logo .logo-img {
    max-width: 220px;
    height: auto;
    display: block;
    margin: 0 auto 8px;
}

.login-subtitle {
    color: var(--text-secondary);
    margin-bottom: 32px;
    font-size: 0.9rem;
    text-align: center;
}

.login-form .form-group {
    margin-bottom: 20px;
}

.login-form label {
    display: block;
    margin-bottom: 6px;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.login-form input {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: border-color 0.2s;
}

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

.error-message {
    color: var(--danger);
    margin-top: 12px;
    font-size: 0.85rem;
}

.login-hint {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ============ BUTTONS ============ */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    width: 100%;
    padding: 10px;
}

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

.btn-accent {
    background: var(--accent);
    color: #fff;
}

.btn-accent:hover {
    background: var(--accent-hover);
}

.btn-success {
    background: var(--success);
    color: #fff;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}

.btn-warning {
    background: var(--warning);
    color: #fff;
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-small {
    padding: 4px 8px;
    font-size: 0.75rem;
}

.btn-logout {
    background: none;
    border: 1px solid var(--danger);
    color: var(--danger);
    padding: 4px 10px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
}

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

/* ============ APP LAYOUT ============ */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* ============ SIDEBAR ============ */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-logo {
    text-align: center;
    margin-bottom: 8px;
}

.sidebar-logo .sidebar-logo-img {
    max-width: 180px;
    height: auto;
    display: block;
}

.sidebar-user-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.username-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.sidebar-lang-switcher {
    display: flex;
    gap: 4px;
    padding: 8px 12px;
    border-top: 1px solid var(--border-color);
    margin-top: 4px;
}

.lang-btn {
    flex: 1;
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    text-transform: uppercase;
    transition: all 0.2s;
}

.lang-btn:hover {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.role-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
    margin-top: 6px;
    text-transform: uppercase;
}

.role-badge.admin {
    background: var(--danger);
    color: #fff;
}

.role-badge.instructor {
    background: var(--primary);
    color: #fff;
}

.role-badge.alumno {
    background: var(--primary);
    color: #fff;
}

.sidebar-nav {
    flex: 1;
    padding: 12px 0;
}

.nav-section h3 {
    padding: 8px 20px;
    font-size: 0.7rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

.nav-item {
    display: block;
    padding: 8px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.2s;
    font-size: 0.9rem;
}

.nav-item:hover, .nav-item.active {
    background: var(--bg-hover);
    color: var(--primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-alerts {
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-icon-btn {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 6px 10px;
    cursor: pointer;
    font-size: 1rem;
    position: relative;
    transition: background 0.2s;
}

.header-icon-btn:hover {
    background: var(--bg-hover);
}

.header-icon-btn .badge {
    position: absolute;
    top: -6px;
    right: -6px;
    font-size: 0.65rem;
    padding: 1px 5px;
    min-width: 16px;
    text-align: center;
}

/* ============ DROPDOWN ============ */
.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 120px;
    width: 360px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 1100;
    margin-top: 4px;
}

.dropdown-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.85rem;
    font-weight: 600;
}

.dropdown-list {
    max-height: 300px;
    overflow-y: auto;
}

.dropdown-item {
    padding: 10px 16px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background 0.2s;
}

.dropdown-item:hover {
    background: var(--bg-hover);
}

.dropdown-item.unread {
    border-left: 3px solid var(--primary);
}

.dropdown-item-title {
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 2px;
}

.dropdown-item-preview {
    font-size: 0.78rem;
    color: var(--text-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.dropdown-item-time {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.dropdown-footer {
    padding: 8px 16px;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.dropdown-footer a {
    font-size: 0.85rem;
    color: var(--primary);
    text-decoration: none;
}

.dropdown-footer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .dropdown-menu {
        width: 280px;
        right: 10px;
    }
}

/* ============ MAIN CONTENT ============ */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.main-header {
    padding: 20px 30px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-secondary);
    position: relative;
}

.main-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary);
}

.badge {
    background: var(--accent);
    color: #fff;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

.content-area {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

/* ============ DASHBOARD ============ */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.dashboard-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
}

.dashboard-card h3 {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
}

.dashboard-card .number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

/* ============ TABLES ============ */
.table-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: var(--bg-tertiary);
}

th {
    padding: 12px 16px;
    text-align: left;
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-secondary);
    font-weight: 600;
}

td {
    padding: 12px 16px;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
    color: var(--text-primary);
}

.compact-table th,
.compact-table td {
    padding: 4px 8px;
    font-size: 0.78rem;
    white-space: nowrap;
}
.compact-table td:first-child {
    font-weight: 500;
}

.sortable {
    cursor: pointer;
    user-select: none;
}
.sortable:hover {
    background: var(--bg-hover);
}
.sort-icon {
    font-size: 0.65rem;
    margin-left: 2px;
}

tr:hover {
    background: var(--bg-hover);
}

/* ============ FORMS ============ */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.form-group {
    margin-bottom: 16px;
}

.form-control {
    width: 100%;
    padding: 8px 12px;
    box-sizing: border-box;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.9rem;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.form-group select {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
    overflow: visible;
}

.form-group select {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
    overflow: visible;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group textarea {
    min-height: 80px;
    resize: vertical;
}

/* ============ MODAL ============ */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    overflow: visible;
}

.modal-header h3 {
    font-size: 1.1rem;
    color: var(--primary);
}

.modal-large {
    max-width: 900px;
}

.modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.1rem;
    color: var(--primary);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
}

.modal-body {
    padding: 20px;
    max-height: 70vh;
    overflow-y: auto;
}

/* ============ COURSE VIEW ============ */
.course-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 20px;
    min-height: 500px;
}

.course-sidebar {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
}

.course-sidebar h3 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    text-transform: uppercase;
}

.course-lesson-item {
    padding: 8px 12px;
    margin-bottom: 4px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.course-lesson-item:hover, .course-lesson-item.active {
    background: var(--bg-hover);
    color: var(--primary);
}

.course-lesson-item.completed {
    color: var(--success);
}

.course-lesson-item.locked {
    opacity: 0.5;
    cursor: not-allowed;
}

.course-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 30px;
}

.course-content h2 {
    margin-bottom: 16px;
    color: var(--primary);
}

.course-content p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.course-content iframe {
    width: 100%;
    height: 400px;
    border: none;
    border-radius: 8px;
}

.course-content video {
    width: 100%;
    border-radius: 8px;
}

.course-content a {
    color: var(--primary);
    text-decoration: none;
}

.course-content a:hover {
    text-decoration: underline;
}

/* ============ AUDIO PRACTICE ============ */
.audio-practice-container {
    padding: 20px;
}

.audio-practice-question {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

.audio-practice-question h4 {
    margin-bottom: 12px;
    color: var(--primary);
}

.audio-practice-question p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.audio-controls {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.audio-btn {
    padding: 10px 20px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
}

.audio-btn.record {
    background: var(--danger);
    color: #fff;
}

.audio-btn.play {
    background: var(--primary);
    color: #fff;
}

.audio-btn.send {
    background: var(--success);
    color: #fff;
}

.audio-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.recording-indicator {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--danger);
    font-size: 0.9rem;
}

.recording-dot {
    width: 10px;
    height: 10px;
    background: var(--danger);
    border-radius: 50%;
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* ============ QUIZ ============ */
.quiz-container {
    padding: 20px;
}

.quiz-question {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

.quiz-question h4 {
    margin-bottom: 12px;
}

.quiz-options label {
    display: block;
    padding: 8px 12px;
    margin-bottom: 6px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.quiz-options label:hover {
    border-color: var(--primary);
}

.quiz-options input[type="radio"]:checked + span {
    color: var(--primary);
}

.quiz-options input[type="text"],
.quiz-options textarea {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    margin-top: 8px;
}

.quiz-result {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

.quiz-result.correct {
    border-color: var(--success);
}

.quiz-result.incorrect {
    border-color: var(--danger);
}

/* ============ SELF ASSESSMENT ============ */
.self-assessment {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-top: 20px;
}

.self-assessment h4 {
    margin-bottom: 16px;
    color: var(--primary);
}

.star-rating {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
}

.star-rating .star {
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-muted);
    transition: color 0.2s;
}

.star-rating .star.active,
.star-rating .star:hover {
    color: var(--warning);
}

.multi-select-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.multi-select-item {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.multi-select-item.selected {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* ============ TRANSRIPTION ============ */
.transcription-container {
    padding: 20px;
}

.transcription-item {
    display: flex;
    gap: 16px;
    padding: 16px;
    margin-bottom: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.transcription-item.instructor {
    border-left: 3px solid var(--primary);
}

.transcription-item.student {
    border-left: 3px solid var(--success);
}

.transcription-role {
    font-weight: 600;
    font-size: 0.85rem;
    margin-bottom: 4px;
}

.transcription-text {
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.transcription-audio {
    display: flex;
    gap: 8px;
    align-items: center;
}

.play-btn {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: none;
    background: var(--primary);
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ============ MESSAGES ============ */
.messages-container {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 20px;
    min-height: 500px;
}

.messages-list {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow-y: auto;
    max-height: 500px;
}

.message-item {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background 0.2s;
}

.message-item:hover, .message-item.active {
    background: var(--bg-hover);
}

.message-item.unread {
    border-left: 3px solid var(--primary);
}

.message-item .message-title {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.message-item .message-preview {
    color: var(--text-muted);
    font-size: 0.8rem;
}

.message-item .message-time {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-top: 4px;
}

.message-detail {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
}

.message-detail .message-header {
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.message-detail .message-body {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ============ PROGRESS ============ */
.progress-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 16px;
}

.progress-card h3 {
    margin-bottom: 8px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-bar .progress-fill {
    height: 100%;
    background: var(--primary);
    border-radius: 4px;
    transition: width 0.3s;
}

.progress-bar .progress-fill.completed {
    background: var(--success);
}

/* ============ COURSE CARDS ============ */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.course-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.2s;
}

.course-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
}

.course-card h3 {
    margin-bottom: 8px;
    color: var(--primary);
}

.course-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.course-card .course-stats {
    display: flex;
    gap: 16px;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.course-card .course-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ============ LOGS ============ */
.log-item {
    padding: 12px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    margin-bottom: 8px;
    font-size: 0.85rem;
}

.log-item .log-action {
    font-weight: 600;
    color: var(--primary);
}

.log-item .log-meta {
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-top: 4px;
}

/* ============ STATUS BADGES ============ */
.status-active {
    color: var(--success);
}

.status-inactive {
    color: var(--danger);
}

.status-badge {
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
}

.status-badge-active {
    background-color: var(--success);
    color: white;
}

.status-badge-inactive {
    background-color: var(--danger);
    color: white;
}

.module-lessons-container .dashboard-card {
    cursor: pointer;
    transition: transform 0.1s;
}

.module-lessons-container .dashboard-card:hover {
    transform: translateX(5px);
}

/* ============ FILE UPLOAD ============ */
.file-upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
}

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

.file-upload-area p {
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.file-upload-area small {
    color: var(--text-muted);
}

/* ============ ACTIONS BAR ============ */
.actions-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.actions-bar h2 {
    font-size: 1.2rem;
}

/* ============ MESSAGES ============ */
.messages-list {
    max-width: 900px;
}

.messages-grid {
    display: grid;
    gap: 8px;
    max-width: 600px;
}

.message-group {
    padding: 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.message-group:hover {
    border-color: var(--primary);
    background: var(--bg-hover);
}

.message-group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.message-group-name {
    font-weight: 600;
}

.unread-badge {
    background: var(--accent);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 12px;
    min-width: 24px;
    text-align: center;
}

.msg-badge-unread {
    background: var(--accent);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 12px;
    min-width: 24px;
    text-align: center;
    display: inline-block;
}

.msg-badge-read {
    background: #4caf50;
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 12px;
    min-width: 24px;
    text-align: center;
    display: inline-block;
}

.sidebar-msg-badge {
    background: var(--accent);
    color: #fff;
    font-size: 0.65rem;
    font-weight: 700;
    padding: 1px 6px;
    border-radius: 10px;
    margin-left: 6px;
    float: right;
}

.message-group-preview {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.message-group-time {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.conversation-view {
    max-width: 800px;
}

.conversation-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.conversation-header h3 {
    flex: 1;
}

.conversation-body {
    max-height: 500px;
    overflow-y: auto;
    padding: 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 16px;
}

.message-bubble {
    margin-bottom: 16px;
    padding: 12px;
    border-radius: 8px;
    max-width: 80%;
}

.my-message {
    background: var(--primary);
    color: #fff;
    margin-left: auto;
}

.other-message {
    background: var(--bg-tertiary);
    margin-right: auto;
}

.message-sender {
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.my-message .message-sender {
    color: rgba(255,255,255,0.8);
}

.message-subject {
    font-weight: 600;
    margin-bottom: 4px;
}

.message-body {
    margin-bottom: 8px;
    white-space: pre-wrap;
}

.message-time {
    font-size: 0.8rem;
    opacity: 0.7;
}

.conversation-input {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
}

.reply-input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.9rem;
    box-sizing: border-box;
}

.reply-textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.9rem;
    resize: vertical;
    min-height: 100px;
    box-sizing: border-box;
}

.compose-message {
    max-width: 600px;
}

.compose-message h3 {
    margin-bottom: 16px;
}

.recipient-select {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px;
    margin-bottom: 16px;
}

.recipient-option {
    padding: 10px;
    cursor: pointer;
    border-radius: 4px;
    transition: background 0.2s;
}

.recipient-option:hover {
    background: var(--bg-hover);
}

.recipient-display {
    padding: 10px 14px;
    background: var(--bg-hover);
    border-radius: 4px;
    font-weight: 600;
    margin-bottom: 16px;
}

.compose-input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.9rem;
    margin-bottom: 12px;
}

.compose-textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.9rem;
    resize: vertical;
    min-height: 150px;
    margin-bottom: 16px;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
    .sidebar {
        width: 60px;
    }

    .sidebar-header h2,
    .sidebar-nav h3,
    .sidebar-nav .nav-item span,
    .sidebar-footer span {
        display: none;
    }

    .main-content {
        margin-left: 60px;
    }

    .course-layout {
        grid-template-columns: 1fr;
    }

    .messages-container {
        grid-template-columns: 1fr;
    }

    .conversation-input {
        flex-direction: column;
    }

    .message-bubble {
        max-width: 100%;
    }
}

/* ============ FLOATING NOTIFICATION TOAST ============ */
#floating-notif-container {
    position: fixed;
    top: 80px;
    right: 20px;
    width: 340px;
    max-width: calc(100vw - 40px);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
    z-index: 10000;
    padding: 14px 16px;
    animation: floatNotifIn 0.3s ease;
}

@keyframes floatNotifIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.floating-notif-content {
    cursor: pointer;
    flex: 1;
    min-width: 0;
}

.floating-notif-content:hover .floating-notif-sender {
    color: var(--primary);
}

.floating-notif-sender {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-primary);
    margin-bottom: 2px;
    transition: color 0.2s;
}

.floating-notif-preview {
    font-size: 0.8rem;
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.floating-notif-close {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.3rem;
    color: var(--text-muted);
    padding: 0 0 0 8px;
    line-height: 1;
    flex-shrink: 0;
    transition: color 0.2s;
}

.floating-notif-close:hover {
    color: var(--text-primary);
}