/* =============================================
   SKS Board - Teacher Styles 
   ============================================= */

/* Teacher-specific body adjustments */
body.teacher-page { 
    margin: 0; 
    padding: 0; 
    height: 100vh; 
    overflow: hidden; 
}

/* =============================================
   TEACHER LOGIN PAGE
   ============================================= */
.teacher-login-page {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    background: var(--color-bg-alt);
    overflow: auto;
}

.teacher-login-main {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 200px);
    padding: var(--space-8);
}

.teacher-login-container {
    width: 100%;
    max-width: 450px;
}

.teacher-login-card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 30px rgba(220, 53, 69, 0.15);
    padding: 2.5rem;
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.teacher-login-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--accent-start) 0%, var(--accent-end) 100%);
}

.teacher-login-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.login-icon {
    font-size: 3.5rem;
    margin-bottom: var(--space-4);
    display: block;
}

.teacher-login-header h2 {
    color: var(--color-text);
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-2);
    font-weight: 600;
}

.teacher-login-header p {
    color: var(--color-text-light);
    font-size: var(--font-size-base);
    margin: 0;
}

.teacher-login-form {
    margin-bottom: var(--space-8);
}

.teacher-login-form .form-group {
    margin-bottom: var(--space-5);
}

.password-input-container {
    position: relative;
    display: flex;
    align-items: center;
}

.password-input-container input {
    padding-right: 50px;
}

.password-toggle {
    position: absolute;
    right: var(--space-3);
    background: none;
    border: none;
    color: var(--color-text-light);
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius-s);
    transition: var(--transition-fast);
}

.password-toggle:hover {
    color: var(--color-text);
    background: var(--secondary-bg);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6) !important;
}

.checkbox-container {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: var(--font-size-s);
    color: var(--color-text-light);
}

.checkbox-container input {
    display: none;
}

.checkmark {
    width: 18px;
    height: 18px;
    border: 2px solid var(--color-border-strong);
    border-radius: var(--radius-xs);
    margin-right: var(--space-2);
    position: relative;
    transition: var(--transition-fast);
}

.checkbox-container:hover .checkmark {
    border-color: var(--accent-start);
}

.checkbox-container input:checked + .checkmark {
    background: var(--accent-start);
    border-color: var(--accent-start);
}

.checkbox-container input:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: -2px;
    left: 3px;
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.forgot-password-link {
    font-size: var(--font-size-s);
    color: var(--accent-start);
    text-decoration: none;
    transition: var(--transition-fast);
}

.forgot-password-link:hover {
    color: var(--accent-hover-start);
    text-decoration: underline;
}

.teacher-login-btn {
    width: 100%;
    padding: var(--space-4) var(--space-6);
    background: linear-gradient(135deg, var(--accent-start) 0%, var(--accent-end) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-m);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
}

.teacher-login-btn:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--accent-hover-start) 0%, var(--accent-hover-end) 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(220, 53, 69, 0.3);
}

.teacher-login-btn:disabled {
    opacity: 0.8;
    cursor: not-allowed;
    transform: none;
}

.btn-text {
    transition: var(--transition-fast);
}

.teacher-login-btn:disabled .btn-text {
    opacity: 0;
}

.btn-spinner {
    position: absolute;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.teacher-login-help {
    background: linear-gradient(135deg, #fff5f5 0%, #fdf2f2 100%);
    border: 1px solid rgba(220, 53, 69, 0.1);
    border-radius: var(--radius-m);
    padding: var(--space-5);
    border-left: 4px solid var(--accent-start);
}

.teacher-login-help h4 {
    margin: 0 0 var(--space-3) 0;
    font-weight: 600;
    color: var(--color-text);
    font-size: var(--font-size-base);
}

.teacher-login-help ul {
    margin: 0;
    padding-left: var(--space-6);
    list-style-type: disc;
}

.teacher-login-help li {
    color: var(--color-text-light);
    margin-bottom: var(--space-1);
    font-size: var(--font-size-s);
    line-height: 1.5;
}

/* =============================================
   TEACHER LOGIN RESPONSIVE DESIGN
   ============================================= */
@media (max-width: 768px) {
    .teacher-login-main {
        padding: var(--space-4);
        min-height: calc(100vh - 160px);
    }
    
    .teacher-login-card {
        padding: var(--space-6);
    }
    
    .login-icon {
        font-size: 3rem;
    }
    
    .form-options {
        flex-direction: column;
        gap: var(--space-3);
        align-items: flex-start;
    }
    
    .forgot-password-link {
        align-self: center;
    }
}

@media (max-width: 480px) {
    .teacher-login-main {
        padding: var(--space-3);
    }
    
    .teacher-login-card {
        padding: var(--space-5);
    }
    
    .teacher-login-header h2 {
        font-size: var(--font-size-l);
    }
}

/* =============================================
   TEACHER HEADER OVERRIDES
   ============================================= */
.teacher-page .header-content {
    /* Override main.css centered layout for teacher dashboard */
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    text-align: left;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-info {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 1rem;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--secondary-bg);
    border: 1px solid var(--secondary-border);
    padding: 0.5rem;
    border-radius: var(--radius-m);
    color: var(--color-text-light);
    text-decoration: none;
    transition: var(--transition-fast);
}

.back-btn:hover {
    background: var(--secondary-hover-bg);
    color: var(--color-text);
}

.project-info {
    font-size: var(--font-size-s);
    color: var(--color-text-light);
}

.logout-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: none;
    border: 1px solid var(--color-border);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-m);
    color: var(--color-text-light);
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: var(--font-size-s);
}

.logout-btn:hover {
    background: var(--secondary-bg);
    color: var(--color-text);
    border-color: var(--color-border-strong);
}

/* =============================================
   TEACHER DASHBOARD LAYOUT
   ============================================= */
.dashboard-container { 
    display: flex; 
    min-height: calc(100vh - 60px); 
    background: var(--color-bg-alt); 
    gap: 10px; 
    padding: 10px; 
    overflow: hidden; 
}

/* =============================================
   TEACHER SIDEBAR NAVIGATION
   ============================================= */
.sidebar {
    width: 280px;
    min-width: 280px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-l);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-content {
    padding: var(--space-6);
    height: 100%;
    overflow-y: auto;
}

.nav-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-menu li {
    margin-bottom: var(--space-2);
}

.nav-link {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    color: var(--color-text-light);
    text-decoration: none;
    border-radius: var(--radius-m);
    transition: var(--transition-fast);
    font-weight: 500;
}

.nav-link:hover {
    background: var(--secondary-bg);
    color: var(--color-text);
}

.nav-link.active {
    background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
    color: white;
}

.nav-icon {
    font-size: var(--font-size-l);
    width: 24px;
    text-align: center;
}

/* =============================================
   TEACHER MAIN CONTENT AREA
   ============================================= */
.main-content {
    flex: 1;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-l);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

.content-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-surface);
}

.content-title-section h2 {
    margin: 0 0 var(--space-2) 0;
    font-size: var(--font-size-xl);
    color: var(--color-text);
}

.content-title-section span {
    color: var(--color-text-light);
    font-size: var(--font-size-base);
}

.content-body {
    flex: 1;
    padding: var(--space-6);
    overflow-y: auto;
    background: var(--color-bg-alt);
}

/* =============================================
   TEACHER DASHBOARD OVERVIEW
   ============================================= */
.dashboard-overview {
    height: 100%;
}

.overview-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-6);
}

.overview-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-l);
    padding: var(--space-6);
    transition: var(--transition);
    cursor: pointer;
}

.overview-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    border-color: var(--accent-start);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-4);
}

.card-content h3 {
    margin: 0 0 var(--space-3) 0;
    font-size: var(--font-size-l);
    color: var(--color-text);
}

.card-content p {
    margin: 0;
    color: var(--color-text-light);
    font-size: var(--font-size-base);
    line-height: 1.5;
}

/* =============================================
   TEACHER AI CHAT INTERFACE
   ============================================= */
.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-6);
}

.chat-title h3 {
    margin: 0;
    color: var(--color-text);
    font-size: var(--font-size-l);
}

.chat-controls {
    display: flex;
    gap: var(--space-3);
}

.chat-container {
    height: calc(100vh - 300px);
    display: flex;
    flex-direction: column;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-l);
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    padding: var(--space-4);
    overflow-y: auto;
    background: var(--color-bg-alt);
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.chat-messages::-webkit-scrollbar {
    display: none;
}

.message {
    margin-bottom: var(--space-4);
    display: flex;
    gap: var(--space-3);
}

.message.user {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-s);
    flex-shrink: 0;
}

.message.user .message-avatar {
    background: var(--accent-start);
    color: white;
}

.message.assistant .message-avatar {
    background: var(--secondary-bg);
    color: var(--color-text);
}

.message-content {
    background: var(--color-surface);
    padding: var(--space-3) var(--space-4);
    border-radius: var(--radius-l);
    border: 1px solid var(--color-border);
    max-width: 80%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
}

.message.user .message-content {
    background: var(--accent-start);
    color: white;
    border-color: var(--accent-start);
}

.chat-input-area {
    padding: var(--space-4);
    border-top: 1px solid var(--color-border);
    background: var(--color-surface);
}

.chat-input-container {
    display: flex;
    gap: var(--space-3);
}

.chat-input {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-l);
    font-size: var(--font-size-base);
    resize: none;
    min-height: 44px;
    max-height: 120px;
}

.chat-input:focus {
    outline: none;
    border-color: var(--accent-start);
    box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}

.send-btn {
    padding: var(--space-3);
    background: var(--accent-start);
    color: white;
    border: none;
    border-radius: var(--radius-l);
    cursor: pointer;
    transition: var(--transition-fast);
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.send-btn:hover:not(:disabled) {
    background: var(--accent-hover-start);
}

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

/* =============================================
   PROJECT DETAIL PAGE
   ============================================= */
.detail-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: var(--space-8);
}

.detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-8);
    flex-wrap: wrap;
    gap: var(--space-4);
}

.detail-actions {
    display: flex;
    gap: var(--space-3);
}

.edit-btn, .delete-btn {
    padding: var(--space-3) var(--space-6);
    border: none;
    border-radius: var(--radius-m);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.edit-btn {
    background: var(--accent-start);
    color: white;
}

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

.delete-btn {
    background: #dc3545;
    color: white;
}

.delete-btn:hover {
    background: #c82333;
}

.project-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

.info-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-l);
    padding: var(--space-6);
}

.info-card h3 {
    margin: 0 0 var(--space-3) 0;
    font-size: var(--font-size-l);
    color: var(--color-text);
}

.info-card p {
    margin: 0;
    color: var(--color-text-light);
    font-size: var(--font-size-base);
}

/* Student Management Styles */
.student-management-page {
    height: 100%;
    overflow-y: auto;
}

.students-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-4);
    margin-top: var(--space-6);
}

.student-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-l);
    padding: var(--space-4);
    transition: var(--transition);
}

.student-card:hover {
    border-color: var(--accent-start);
    box-shadow: var(--shadow-sm);
}

/* =============================================
   SCROLLBAR HIDING (Teacher specific areas)
   ============================================= */
.content-body::-webkit-scrollbar,
.chat-messages::-webkit-scrollbar,
.student-management-page::-webkit-scrollbar,
.sidebar-content::-webkit-scrollbar {
    width: 0px;
    height: 0px;
    background: transparent;
    display: none;
}

/* =============================================
   TEACHER RESPONSIVE DESIGN
   ============================================= */
@media (max-width: 1024px) {
    .dashboard-container {
        flex-direction: column;
        height: auto;
        overflow: visible;
    }
    
    .sidebar {
        width: 100%;
        min-width: auto;
        order: 2;
    }
    
    .main-content {
        order: 1;
        min-height: 60vh;
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
    
    .header-left {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .dashboard-container {
        gap: var(--space-2);
        padding: var(--space-2);
    }
    
    .content-body,
    .sidebar-content {
        padding: var(--space-4);
    }
    
    .overview-cards {
        grid-template-columns: 1fr;
    }
    
    .detail-container {
        padding: var(--space-4);
    }
    
    .detail-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .chat-container {
        height: 50vh;
    }
    
    .project-info-grid {
        grid-template-columns: 1fr;
    }
}

/* =============================================
   TEACHER DASHBOARD (AFTER LOGIN)
   ============================================= */
.teacher-dashboard-main {
    flex: 1;
    padding: var(--space-8);
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    display: flex;
    flex-direction: column;
}

.dashboard-welcome {
    text-align: center;
    margin-bottom: var(--space-8);
    padding: var(--space-6);
    background: linear-gradient(135deg, rgba(220, 53, 69, 0.05) 0%, rgba(200, 35, 51, 0.05) 100%);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(220, 53, 69, 0.1);
}

.dashboard-welcome h2 {
    margin: 0 0 var(--space-2) 0;
    color: var(--color-text);
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.dashboard-welcome p {
    margin: 0;
    color: var(--color-text-light);
    font-size: var(--font-size-base);
}

.teacher-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    margin-left: var(--space-4);
}

.teacher-info span {
    font-size: var(--font-size-s);
    color: var(--color-text-light);
}

.teacher-class {
    font-weight: 500;
    color: var(--accent-start);
}

.projects-section {
    margin-bottom: var(--space-8);
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - 280px);
    flex: 1 1 auto;
    position: relative;
}

.projects-section .section-header {
    flex-shrink: 0;
}

.projects-section .projects-grid {
    flex: 1;
    width: 100%;
    display: grid;
}

.projects-section .empty-state {
    display: none;
}

.projects-section.is-empty .projects-grid {
    display: none;
}

.projects-section.is-empty .empty-state {
    display: flex;
    flex: 1 1 auto;
    margin-top: auto;
    margin-bottom: auto;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-border);
}

.section-header h3 {
    margin: 0;
    color: var(--color-text);
    font-size: var(--font-size-l);
    font-weight: 600;
}

.section-actions {
    display: flex;
    gap: var(--space-3);
}

.filter-btn,
.sort-btn {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--secondary-bg);
    border: 1px solid var(--secondary-border);
    border-radius: var(--radius-m);
    color: var(--color-text-light);
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: var(--font-size-s);
}

.filter-btn:hover,
.sort-btn:hover {
    background: var(--secondary-hover-bg);
    color: var(--color-text);
    border-color: var(--color-border-strong);
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(135deg, var(--accent-start) 0%, var(--accent-end) 100%);
    opacity: 0;
    transition: var(--transition);
}

.project-card:hover::before {
    opacity: 1;
}

.teacher-page .projects-grid {
    gap: var(--space-4);
    align-content: flex-start;
}

.teacher-page .project-card {
    position: relative;
    padding: var(--space-5) var(--space-5) var(--space-4);
    border-radius: var(--radius-l);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.teacher-page .project-card-header {
    margin-bottom: 0;
}

.teacher-page .project-card-body {
    gap: 0.35rem;
    font-size: 0.9rem;
}

.teacher-page .project-card-body p {
    margin: 0;
}

.teacher-page .project-card-footer {
    margin-top: auto;
    padding-top: var(--space-3);
    border-top: 1px solid var(--secondary-border);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-4);
}

.project-title {
    flex: 1;
}

.project-title h4 {
    margin: 0 0 var(--space-1) 0;
    color: var(--color-text);
    font-size: var(--font-size-l);
    font-weight: 600;
    line-height: 1.3;
}

.project-class {
    font-size: var(--font-size-s);
    color: var(--accent-start);
    font-weight: 500;
}

.project-menu {
    background: none;
    border: none;
    color: var(--color-text-light);
    cursor: pointer;
    padding: var(--space-2);
    border-radius: var(--radius-s);
    transition: var(--transition-fast);
}

.project-menu:hover {
    background: var(--secondary-bg);
    color: var(--color-text);
}

.project-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.stat-item {
    text-align: center;
    padding: var(--space-3);
    background: var(--color-bg-alt);
    border-radius: var(--radius-m);
}

.stat-number {
    display: block;
    font-size: var(--font-size-l);
    font-weight: 600;
    color: var(--accent-start);
    margin-bottom: var(--space-1);
}

.stat-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.project-description {
    color: var(--color-text-light);
    font-size: var(--font-size-s);
    line-height: 1.5;
    margin-bottom: var(--space-4);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.project-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border);
}

.project-date {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.project-status {
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-pill);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.project-status.active {
    background: #d4edda;
    color: #155724;
}

.project-status.completed {
    background: #e2e3e5;
    color: #6c757d;
}

.project-status.draft {
    background: #fff3cd;
    color: #856404;
}


/* =============================================
   TEACHER LOGIN HEADER WITH BACK BUTTON
   ============================================= */
.teacher-login-page .header-content {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    text-align: left;
    padding: 0 var(--space-6);
}

.teacher-login-page .header-left {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    width: 100%;
}

.teacher-login-page .header-title {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    flex: 1;
    text-align: center;
}

.teacher-login-page .header-title h1 {
    margin: 0;
    font-size: var(--font-size-xxl);
    font-weight: 600;
    color: var(--color-text);
}

.teacher-login-page .back-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--secondary-bg);
    border: 1px solid var(--secondary-border);
    border-radius: var(--radius-m);
    color: var(--color-text-light);
    text-decoration: none;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.teacher-login-page .back-btn:hover {
    background: var(--secondary-hover-bg);
    color: var(--color-text);
    border-color: var(--color-border-strong);
    transform: translateX(-2px);
}

.teacher-login-page .back-btn:active {
    transform: translateX(-1px);
}

/* Responsive adjustments for mobile */
@media (max-width: 768px) {
    .teacher-login-page .header-content {
        padding: 0 var(--space-4);
    }
    
    .teacher-login-page .header-left {
        gap: var(--space-3);
    }
    
    .teacher-login-page .back-btn {
        width: 36px;
        height: 36px;
    }
    
    .teacher-login-page .header-title h1 {
        font-size: var(--font-size-xl);
    }
}


/* =============================================
   TEACHER LOGIN HEADER LAYOUT CORRECTION
   ============================================= */
.teacher-login-page .header-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 0 var(--space-6);
    position: relative;
}

.teacher-login-page .header-left {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    position: relative;
}

.teacher-login-page .back-btn {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
}

.teacher-login-page .header-title {
    flex: 1;
    text-align: center;
}

.teacher-login-page .header-title h1 {
    margin: 0;
    font-size: var(--font-size-xxl);
    font-weight: 600;
    color: var(--color-text);
}

.teacher-login-page .user-type.teacher {
    margin-top: var(--space-2);
    align-self: center;
}

/* Override previous styles for cleaner layout */
.teacher-login-page .header-content {
    gap: 0;
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .teacher-login-page .header-content {
        padding: 0 var(--space-4);
    }
    
    .teacher-login-page .header-title h1 {
        font-size: var(--font-size-xl);
    }
}


/* =============================================
   SUBTLE BACK BUTTON ANIMATION
   ============================================= */
.teacher-login-page .back-btn:hover {
    background: var(--secondary-hover-bg);
    color: var(--color-text);
    border-color: var(--color-border-strong);
    transform: translateY(-50%) translateX(-1px);
}

.teacher-login-page .back-btn:active {
    transform: translateY(-50%) translateX(0px);
}