/**
 * Dashboard, Course, Lesson, Quiz, Compiler & Admin Styles
 * CodingRider Platform
 */

/* === BREADCRUMBS & SECTION HEADERS === */
.page-header-banner {
    background: linear-gradient(135deg, var(--color-dark-green) 0%, #1f3527 100%);
    color: #ffffff;
    padding: 50px 0;
    margin-bottom: 40px;
    border-bottom: 4px solid var(--color-bright-green);
}

.page-header-inner {
    width: 90%;
    max-width: 1300px;
    margin: 0 auto;
    box-sizing: border-box;
}

.breadcrumb-trail {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.88rem;
    color: #94a3b8;
    margin-bottom: 12px;
    word-break: break-word;
}

.breadcrumb-trail a {
    color: var(--color-button-green);
    text-decoration: none;
}

.breadcrumb-trail a:hover {
    text-decoration: underline;
}

.page-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin: 0 0 10px 0;
    color: #ffffff;
    word-break: break-word;
    overflow-wrap: break-word;
}

.page-subtitle {
    font-size: 1.05rem;
    color: #cbd5e1;
    margin: 0;
    max-width: 750px;
    word-break: break-word;
}

/* === DASHBOARD LAYOUT === */
.dashboard-grid {
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
    gap: 30px;
    width: 90%;
    max-width: 1300px;
    margin: 40px auto;
    box-sizing: border-box;
}

.dashboard-grid > * {
    min-width: 0;
    max-width: 100%;
}

.dashboard-main-content {
    min-width: 0;
    max-width: 100%;
    width: 100%;
    box-sizing: border-box;
}

/* ─────────────────────────────────────────
   SIDEBAR BASE (desktop)
───────────────────────────────────────── */
.dashboard-sidebar {
    background: #ffffff;
    border-radius: 16px;
    padding: 0;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.06);
    border: 1px solid #edf2f7;
    height: fit-content;
    position: sticky;
    top: 20px;
    overflow: hidden;
}

/* ── Profile card ── */
.student-profile-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 28px 20px 22px;
    background: linear-gradient(160deg, var(--color-dark-green) 0%, #1f3527 100%);
    border-bottom: 3px solid var(--color-bright-green);
}

.profile-avatar-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-bright-green) 0%, var(--color-accent-blue) 100%);
    color: var(--color-dark-green);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 800;
    flex-shrink: 0;
    box-shadow: 0 4px 14px rgba(0,175,255,0.3);
    margin-bottom: 12px;
}

.profile-info {
    width: 100%;
}

.student-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: #ffffff;
    margin: 0 0 4px 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.student-email {
    font-size: 0.78rem;
    color: #a8d5b5;
    margin: 0 0 8px 0;
    word-break: break-all;
}

.role-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 12px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    background: rgba(140,255,130,0.18);
    color: var(--color-bright-green);
    border: 1px solid rgba(140,255,130,0.35);
}

/* ── Mobile toggle button (hidden on desktop) ── */
.sidebar-nav-toggle {
    display: none;
}

/* ── Nav list ── */
.dashboard-nav-list {
    list-style: none;
    padding: 12px 10px;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.dashboard-nav-item a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 11px 14px;
    border-radius: 10px;
    color: #475569;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.dashboard-nav-item a:hover,
.dashboard-nav-item.active a {
    background-color: #f1fdf4;
    color: #059669;
}

.nav-icon {
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
}

.nav-label {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-item-divider {
    border-top: 1px solid #edf2f7;
    margin-top: 8px;
    padding-top: 8px;
}

.nav-admin {
    color: #d97706 !important;
}

.nav-signout {
    color: #ef4444 !important;
}

.nav-signout:hover {
    background: #fef2f2 !important;
    color: #dc2626 !important;
}

/* --- Stats Cards Grid --- */
.stats-cards-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr));
    gap: 20px;
    margin-bottom: 35px;
    width: 100%;
    box-sizing: border-box;
}

.stat-metric-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    border: 1px solid #edf2f7;
    display: flex;
    align-items: center;
    gap: 18px;
    min-width: 0;
    box-sizing: border-box;
}

.stat-metric-card > div {
    min-width: 0;
}

.stat-icon-box {
    width: 55px;
    height: 55px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.icon-blue { background: #e0f2fe; color: #0284c7; }
.icon-green { background: #dcfce7; color: #16a34a; }
.icon-yellow { background: #fef3c7; color: #d97706; }
.icon-purple { background: #f3e8ff; color: #9333ea; }

.stat-value {
    font-size: 1.7rem;
    font-weight: 700;
    color: var(--color-dark-green);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.85rem;
    color: #64748b;
    font-weight: 500;
    word-break: break-word;
}

/* --- Dashboard Panel Cards --- */
.dashboard-panel {
    background: #ffffff;
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    border: 1px solid #edf2f7;
    margin-bottom: 30px;
    min-width: 0;
    max-width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}
    padding: 30px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    border: 1px solid #edf2f7;
    margin-bottom: 30px;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 14px;
    border-bottom: 2px solid #f8fafc;
}

.panel-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-dark-green);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* --- Progress Meter Bar --- */
.progress-bar-container {
    width: 100%;
    height: 10px;
    background-color: #e2e8f0;
    border-radius: 10px;
    overflow: hidden;
    margin: 10px 0;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #10b981 0%, #8CFF82 100%);
    border-radius: 10px;
    transition: width 0.5s ease;
}

/* --- Enrolled Course Item --- */
.enrolled-course-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 18px;
    border-radius: 12px;
    border: 1px solid #edf2f7;
    margin-bottom: 15px;
    background: #fafafa;
    transition: background 0.2s;
    box-sizing: border-box;
    width: 100%;
    max-width: 100%;
}

.enrolled-course-item:hover {
    background: #f8fafc;
}

.enrolled-course-thumb {
    width: 80px;
    height: 60px;
    border-radius: 8px;
    object-fit: cover;
    flex-shrink: 0;
}

.enrolled-course-info {
    flex-grow: 1;
    min-width: 0;
}

.enrolled-course-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-dark-green);
    margin: 0 0 6px 0;
    word-break: break-word;
}

.enrolled-course-title a {
    color: inherit;
    text-decoration: none;
}

.enrolled-course-title a:hover {
    color: #059669;
}

.enrolled-progress-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
    color: #64748b;
    margin: 4px 0 6px 0;
    flex-wrap: wrap;
}

.enrolled-course-action {
    flex-shrink: 0;
}

/* --- Recent Lessons Grid (Dashboard) --- */
.recent-lessons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
    gap: 15px;
    width: 100%;
    box-sizing: border-box;
}

.recent-lesson-card {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 18px;
    min-width: 0;
    box-sizing: border-box;
}

/* === TUTORIAL & LESSON LAYOUT === */
.lesson-layout-grid {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 30px;
    width: 92%;
    max-width: 1400px;
    margin: 40px auto;
    box-sizing: border-box;
}

.lesson-sidebar {
    background: #ffffff;
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    border: 1px solid #edf2f7;
    height: fit-content;
    position: sticky;
    top: 20px;
    min-width: 0;
    box-sizing: border-box;
}

.lesson-sidebar-header {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #edf2f7;
}

.syllabus-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.syllabus-item a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border-radius: 8px;
    color: #334155;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
    word-break: break-word;
    overflow-wrap: break-word;
    gap: 8px;
}

.syllabus-item a > div {
    min-width: 0;
    flex: 1;
}

.syllabus-item a:hover {
    background-color: #f1fdf4;
    color: #059669;
}

.syllabus-item.active a {
    background-color: var(--color-dark-green);
    color: #ffffff;
    font-weight: 600;
}

.syllabus-item .lesson-status-icon {
    font-size: 0.85rem;
    flex-shrink: 0;
}

.syllabus-item.completed .lesson-status-icon {
    color: #10b981;
}

/* --- Lesson Content Body --- */
.lesson-content-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 45px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    border: 1px solid #edf2f7;
    min-width: 0;
    max-width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}

.lesson-meta-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 20px;
    border-bottom: 1px solid #edf2f7;
    margin-bottom: 30px;
    flex-wrap: wrap;
    gap: 15px;
}

.lesson-meta-tags {
    display: flex;
    align-items: center;
    gap: 12px;
}

.lesson-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.lesson-badge.time { background: #e0f2fe; color: #0369a1; }
.lesson-badge.lang { background: #dcfce7; color: #166534; }

.lesson-actions-group {
    display: flex;
    gap: 10px;
}

.btn-action-icon {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 30px;
    font-size: 0.88rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid #cbd5e1;
    background: #ffffff;
    color: #475569;
    transition: all 0.2s;
}

.btn-action-icon:hover {
    border-color: #059669;
    color: #059669;
}

.btn-action-icon.active {
    background: #fef08a;
    border-color: #eab308;
    color: #854d0e;
}

.lesson-body-html {
    font-size: 1.05rem;
    line-height: 1.8;
    color: #334155;
    word-break: break-word;
    overflow-wrap: break-word;
    max-width: 100%;
    box-sizing: border-box;
}

.lesson-body-html h2,
.lesson-body-html h3,
.lesson-body-html h4 {
    color: var(--color-dark-green);
    margin-top: 30px;
    margin-bottom: 15px;
}

.lesson-body-html p {
    margin-bottom: 20px;
}

.lesson-body-html ul,
.lesson-body-html ol {
    padding-left: 25px;
    margin-bottom: 20px;
}

.lesson-body-html li {
    margin-bottom: 8px;
}

.lesson-body-html pre {
    background: #1e293b;
    color: #f8fafc;
    padding: 16px;
    border-radius: 10px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    max-width: 100%;
    box-sizing: border-box;
    font-size: 0.92rem;
    line-height: 1.5;
    margin: 18px 0;
}

.lesson-body-html code {
    font-family: 'Fira Code', 'Courier New', monospace;
    font-size: 0.9em;
    background: #f1f5f9;
    color: #0f766e;
    padding: 2px 6px;
    border-radius: 4px;
    word-break: break-all;
}

.lesson-body-html pre code {
    background: transparent;
    color: inherit;
    padding: 0;
    border-radius: 0;
    word-break: normal;
}

.lesson-body-html img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    display: block;
    margin: 20px auto;
}

.lesson-body-html table {
    width: 100%;
    max-width: 100%;
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border-collapse: collapse;
    margin: 20px 0;
}

.lesson-body-html table th,
.lesson-body-html table td {
    padding: 10px 14px;
    border: 1px solid #e2e8f0;
}

/* --- Code Snippet Box --- */
.code-snippet-box {
    background: #1e293b;
    border-radius: 12px;
    overflow: hidden;
    margin: 25px 0;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    max-width: 100%;
    box-sizing: border-box;
}

.code-snippet-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #0f172a;
    padding: 10px 18px;
    font-size: 0.85rem;
    color: #94a3b8;
    font-family: 'Fira Code', monospace;
    gap: 10px;
    flex-wrap: wrap;
    box-sizing: border-box;
}

.code-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.btn-copy-code {
    background: rgba(255, 255, 255, 0.1);
    color: #e2e8f0;
    border: none;
    border-radius: 6px;
    padding: 4px 10px;
    font-size: 0.78rem;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-copy-code:hover {
    background: var(--color-bright-green);
    color: var(--color-dark-green);
}

.code-snippet-pre {
    margin: 0;
    padding: 20px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    font-family: 'Fira Code', monospace;
    font-size: 0.95rem;
    color: #f8fafc;
    line-height: 1.6;
    max-width: 100%;
    box-sizing: border-box;
}

/* --- Related Tutorials Grid (Lesson page) --- */
.related-lessons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(240px, 100%), 1fr));
    gap: 18px;
    width: 100%;
    box-sizing: border-box;
}

.related-lesson-card {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 18px;
    min-width: 0;
    box-sizing: border-box;
}

/* --- Lesson Pagination Navigation --- */
.lesson-nav-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid #edf2f7;
    padding-top: 30px;
    margin-top: 40px;
    flex-wrap: wrap;
    gap: 15px;
}

.btn-nav-lesson {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    background: #f1f5f9;
    color: var(--color-dark-green);
    transition: all 0.3s;
    max-width: 100%;
    box-sizing: border-box;
}

.btn-nav-lesson:hover {
    background: var(--color-bright-green);
}

.btn-mark-complete {
    background: #10b981;
    color: #ffffff;
    border: none;
    padding: 12px 24px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: background 0.2s;
}

.btn-mark-complete:hover {
    background: #059669;
}

/* === ONLINE COMPILER IDE === */
.compiler-ide-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    width: 94%;
    max-width: 1400px;
    margin: 30px auto;
    min-height: 580px;
}

.ide-panel {
    background: #1e293b;
    border-radius: 16px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.ide-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #0f172a;
    padding: 12px 20px;
    border-bottom: 1px solid #334155;
    flex-wrap: wrap;
    gap: 10px;
}

.ide-select {
    background: #1e293b;
    color: #ffffff;
    border: 1px solid #475569;
    padding: 8px 14px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
}

.ide-select:focus {
    outline: 2px solid var(--color-bright-green);
}

.ide-btn-group {
    display: flex;
    gap: 10px;
}

.btn-ide {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.88rem;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-run-code {
    background: var(--color-bright-green);
    color: var(--color-dark-green);
}

.btn-run-code:hover {
    background: #a3ea9f;
    transform: translateY(-1px);
}

.btn-reset-code {
    background: #334155;
    color: #e2e8f0;
}

.btn-reset-code:hover {
    background: #475569;
}

.code-editor-textarea {
    width: 100%;
    flex-grow: 1;
    min-height: 480px;
    background: #1e293b;
    color: #f8fafc;
    font-family: 'Fira Code', monospace;
    font-size: 1rem;
    line-height: 1.6;
    padding: 20px;
    border: none;
    resize: vertical;
    box-sizing: border-box;
}

.code-editor-textarea:focus {
    outline: none;
}

.output-terminal {
    background: #090d16;
    color: #4ade80;
    font-family: 'Fira Code', monospace;
    font-size: 0.95rem;
    padding: 20px;
    flex-grow: 1;
    overflow-y: auto;
    white-space: pre-wrap;
    min-height: 480px;
}

/* === QUIZ & PRACTICE STYLES === */
.quiz-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 35px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    border: 1px solid #edf2f7;
    margin-bottom: 25px;
}

.quiz-question-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-dark-green);
    margin: 0 0 20px 0;
}

.quiz-options-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.quiz-option-label {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 20px;
    border-radius: 10px;
    border: 2px solid #e2e8f0;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 1rem;
}

.quiz-option-label:hover {
    border-color: #94a3b8;
    background: #f8fafc;
}

.quiz-option-input:checked + .quiz-option-content {
    font-weight: 600;
    color: var(--color-dark-green);
}

.quiz-option-label.correct {
    background: #ecfdf5;
    border-color: #10b981;
    color: #065f46;
}

.quiz-option-label.incorrect {
    background: #fef2f2;
    border-color: #ef4444;
    color: #991b1b;
}

.quiz-explanation-box {
    margin-top: 15px;
    padding: 15px 20px;
    border-radius: 10px;
    background: #f0fdf4;
    border-left: 4px solid #10b981;
    font-size: 0.92rem;
    color: #166534;
}

/* === FORMS & AUTH PAGES === */
.auth-wrapper {
    max-width: 480px;
    margin: 50px auto;
    background: #ffffff;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.07);
    border: 1px solid #edf2f7;
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-dark-green);
    margin: 0 0 8px 0;
}

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

.form-label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    color: #334155;
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 12px 16px;
    border-radius: 10px;
    border: 1px solid #cbd5e1;
    font-size: 0.95rem;
    font-family: 'Poppins', sans-serif;
    box-sizing: border-box;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-input:focus {
    outline: none;
    border-color: var(--color-accent-blue);
    box-shadow: 0 0 0 3px rgba(0, 175, 255, 0.15);
}

.btn-primary-block {
    width: 100%;
    padding: 14px;
    border-radius: 50px;
    background-color: var(--color-button-green);
    color: var(--color-dark-green);
    font-weight: 700;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-primary-block:hover {
    background-color: #a0e89c;
    transform: translateY(-2px);
}

/* === TABLES FOR ADMIN & DASHBOARD === */
.data-table-container {
    width: 100%;
    overflow-x: auto;
    background: #ffffff;
    border-radius: 12px;
    border: 1px solid #edf2f7;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.92rem;
}

.data-table th {
    background: #f8fafc;
    padding: 14px 18px;
    font-weight: 600;
    color: #475569;
    border-bottom: 2px solid #e2e8f0;
}

.data-table td {
    padding: 14px 18px;
    border-bottom: 1px solid #f1f5f9;
    color: #334155;
}

.data-table tr:hover td {
    background-color: #f8fafc;
}

/* ============================================================
   RESPONSIVE DESIGN – CONSOLIDATED TABLET & MOBILE RULES
   ============================================================ */

/* ─────────────────────────────────────────────────────────────
   1. TABLET BREAKPOINT (max-width: 992px)
   ───────────────────────────────────────────────────────────── */
@media (max-width: 992px) {
    .dashboard-grid,
    .lesson-layout-grid,
    .compiler-ide-container {
        grid-template-columns: minmax(0, 1fr) !important;
        width: 100% !important;
        max-width: 100% !important;
        gap: 20px;
        margin: 20px auto;
        box-sizing: border-box !important;
    }

    .dashboard-grid > *,
    .lesson-layout-grid > *,
    .dashboard-main-content {
        min-width: 0 !important;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .dashboard-sidebar,
    .lesson-sidebar {
        position: static;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box;
    }

    .student-profile-card {
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 16px;
        text-align: left;
        padding: 18px 20px;
    }

    .profile-avatar-circle {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
        margin: 0;
        flex-shrink: 0;
    }

    .profile-info {
        min-width: 0;
        flex: 1;
    }

    .student-name {
        font-size: 1.15rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .student-email {
        font-size: 0.8rem;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .dashboard-nav-list {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 6px;
        padding: 12px 16px;
    }

    .dashboard-nav-item {
        width: 100%;
    }

    .dashboard-nav-item a {
        padding: 9px 12px;
        font-size: 0.84rem;
        border: 1px solid #edf2f7;
        background: #f8fafc;
        border-radius: 8px;
    }

    .stats-cards-row {
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
        gap: 14px;
        margin-bottom: 20px;
    }

    .lesson-content-card {
        padding: 28px 20px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }

    .compiler-ide-container {
        grid-template-columns: minmax(0, 1fr);
        gap: 16px;
        margin: 20px auto;
        width: 100%;
    }

    .code-editor-textarea,
    .output-terminal {
        min-height: 280px;
    }
}

/* ─────────────────────────────────────────────────────────────
   2. MOBILE & PHONES BREAKPOINT (max-width: 768px)
   ───────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    /* Main container full width with clean uniform padding */
    .content-container {
        width: 100% !important;
        max-width: 100% !important;
        padding-left: 12px !important;
        padding-right: 12px !important;
        padding-top: 10px !important;
        padding-bottom: 30px !important;
        box-sizing: border-box !important;
    }

    .page-header-banner {
        padding: 24px 0;
        margin-bottom: 18px;
    }

    .page-header-inner {
        width: 100%;
        padding: 0 14px;
        box-sizing: border-box;
    }

    .breadcrumb-trail {
        font-size: 0.8rem;
        gap: 6px;
        margin-bottom: 8px;
    }

    .page-title {
        font-size: 1.45rem;
    }

    .page-subtitle {
        font-size: 0.88rem;
    }

    /* Convert grid layout to stacked flex column to prevent grid-track blowout */
    .dashboard-grid,
    .lesson-layout-grid {
        display: flex !important;
        flex-direction: column !important;
        width: 100% !important;
        max-width: 100% !important;
        margin: 12px 0 !important;
        gap: 16px !important;
        box-sizing: border-box !important;
    }

    .dashboard-grid > *,
    .lesson-layout-grid > *,
    .dashboard-main-content {
        min-width: 0 !important;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    /* Collapsible dashboard sidebar */
    .sidebar-nav-toggle {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        padding: 13px 18px;
        background: #ffffff;
        border: none;
        border-top: 1px solid #edf2f7;
        font-size: 0.92rem;
        font-weight: 600;
        color: var(--color-dark-green);
        cursor: pointer;
        transition: background-color 0.2s;
        box-sizing: border-box;
    }

    .sidebar-nav-toggle:hover {
        background: #f8fafc;
    }

    .sidebar-chevron {
        transition: transform 0.25s ease;
        font-size: 0.85rem;
        color: #64748b;
    }

    .sidebar-nav-toggle.active .sidebar-chevron {
        transform: rotate(180deg);
    }

    .dashboard-nav-list {
        display: none;
        grid-template-columns: 1fr;
        gap: 4px;
        padding: 8px 12px 14px 12px;
        background: #ffffff;
    }

    .dashboard-nav-list.open {
        display: flex;
        flex-direction: column;
    }

    .dashboard-nav-item a {
        padding: 10px 14px;
        font-size: 0.88rem;
    }

    /* Metric Cards: exactly 2 equal columns, perfectly contained */
    .stats-cards-row {
        display: grid !important;
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
        gap: 10px !important;
        width: 100% !important;
        max-width: 100% !important;
        margin-bottom: 18px !important;
        box-sizing: border-box !important;
    }

    .stat-metric-card {
        padding: 14px 8px !important;
        display: flex !important;
        flex-direction: column !important;
        align-items: center !important;
        text-align: center !important;
        gap: 8px !important;
        min-width: 0 !important;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        overflow: hidden !important;
    }

    .stat-metric-card > div {
        min-width: 0 !important;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        text-align: center !important;
    }

    .stat-icon-box {
        width: 40px !important;
        height: 40px !important;
        font-size: 1.15rem !important;
        border-radius: 10px !important;
        flex-shrink: 0 !important;
    }

    .stat-value {
        font-size: 1.35rem !important;
        line-height: 1.2 !important;
    }

    .stat-label {
        font-size: 0.74rem !important;
        line-height: 1.2 !important;
        word-break: break-word !important;
        overflow-wrap: break-word !important;
    }

    /* Dashboard panels */
    .dashboard-panel {
        padding: 16px 12px;
        margin-bottom: 16px;
        border-radius: 12px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
        overflow: hidden;
    }

    .panel-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        margin-bottom: 14px;
        width: 100%;
        box-sizing: border-box;
    }

    .panel-title {
        font-size: 1.1rem;
    }

    /* Enrolled course cards stack neatly */
    .enrolled-course-item {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 12px !important;
        padding: 14px 12px !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .enrolled-course-thumb {
        width: 100% !important;
        height: 150px !important;
        border-radius: 8px !important;
        object-fit: cover !important;
    }

    .enrolled-course-info {
        width: 100% !important;
        min-width: 0 !important;
    }

    .enrolled-course-title {
        font-size: 1.02rem !important;
        word-break: break-word !important;
    }

    .enrolled-progress-meta {
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        flex-wrap: wrap !important;
        gap: 6px !important;
        font-size: 0.82rem !important;
    }

    .enrolled-course-action {
        width: 100% !important;
    }

    .enrolled-course-action .btn {
        width: 100% !important;
        box-sizing: border-box !important;
        display: flex !important;
        justify-content: center !important;
        text-align: center !important;
        padding: 10px 14px !important;
    }

    /* Recent lessons and related lessons: single column */
    .recent-lessons-grid,
    .related-lessons-grid {
        grid-template-columns: 1fr !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .recent-lesson-card,
    .related-lesson-card {
        width: 100% !important;
        box-sizing: border-box !important;
        min-width: 0 !important;
    }

    /* Data tables horizontal scrolling */
    .data-table-container {
        border-radius: 8px;
        width: 100% !important;
        max-width: 100% !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
        box-sizing: border-box !important;
    }

    .data-table {
        min-width: 480px;
    }

    .data-table th,
    .data-table td {
        padding: 10px 12px;
        font-size: 0.82rem;
    }

    /* Lesson page mobile view */
    .lesson-sidebar {
        padding: 16px 12px !important;
        border-radius: 12px;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .lesson-content-card {
        padding: 18px 12px !important;
        border-radius: 12px;
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        overflow: hidden;
    }

    .lesson-meta-bar {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 12px !important;
        padding-bottom: 15px !important;
        margin-bottom: 20px !important;
    }

    .lesson-meta-tags {
        display: flex !important;
        flex-wrap: wrap !important;
        gap: 8px !important;
    }

    .lesson-actions-group {
        display: flex !important;
        gap: 8px !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .btn-action-icon {
        flex: 1 !important;
        justify-content: center !important;
        text-align: center !important;
        padding: 8px 10px !important;
        font-size: 0.82rem !important;
        box-sizing: border-box !important;
    }

    .code-snippet-header {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: 8px !important;
        padding: 10px 14px !important;
    }

    .code-header-actions {
        width: 100% !important;
        display: flex !important;
        gap: 8px !important;
    }

    .code-header-actions .btn-copy-code {
        flex: 1 !important;
        justify-content: center !important;
        text-align: center !important;
        padding: 6px 10px !important;
    }

    .code-snippet-pre {
        padding: 14px 12px !important;
        font-size: 0.88rem !important;
    }

    /* Lesson Navigation Footer: full width stacked buttons */
    .lesson-nav-footer {
        flex-direction: column !important;
        align-items: stretch !important;
        gap: 12px !important;
        padding-top: 20px !important;
        margin-top: 25px !important;
    }

    .lesson-nav-footer > div:empty {
        display: none !important;
    }

    .btn-nav-lesson {
        width: 100% !important;
        box-sizing: border-box !important;
        text-align: center !important;
        justify-content: center !important;
        white-space: normal !important;
        word-break: break-word !important;
        padding: 12px 14px !important;
        font-size: 0.88rem !important;
    }
}

/* ─────────────────────────────────────────────────────────────
   3. SMALL MOBILE PHONES (max-width: 480px)
   ───────────────────────────────────────────────────────────── */
@media (max-width: 480px) {
    .student-profile-card {
        padding: 14px !important;
        gap: 12px !important;
    }

    .profile-avatar-circle {
        width: 48px !important;
        height: 48px !important;
        font-size: 1.2rem !important;
    }

    .student-name {
        font-size: 0.98rem !important;
    }

    .student-email {
        font-size: 0.72rem !important;
    }

    .role-badge {
        font-size: 0.62rem !important;
        padding: 2px 6px !important;
    }

    /* Metric cards: 2 columns, compact & clean */
    .stats-cards-row {
        grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
        gap: 8px !important;
        margin-bottom: 16px !important;
    }

    .stat-metric-card {
        padding: 12px 6px !important;
        gap: 6px !important;
    }

    .stat-icon-box {
        width: 36px !important;
        height: 36px !important;
        font-size: 1rem !important;
        border-radius: 10px;
    }

    .stat-value {
        font-size: 1.25rem !important;
    }

    .stat-label {
        font-size: 0.7rem !important;
        line-height: 1.2;
        word-break: break-word !important;
    }

    /* Compiler IDE Toolbar */
    .ide-toolbar {
        padding: 10px 12px;
        gap: 8px;
        flex-direction: column;
    }

    .ide-select {
        width: 100%;
        font-size: 0.82rem;
    }

    .ide-btn-group {
        width: 100%;
        display: flex;
        gap: 6px;
    }

    .btn-ide {
        flex: 1;
        justify-content: center;
        padding: 8px 6px;
        font-size: 0.78rem;
    }

    /* Auth modal / login wrapper */
    .auth-wrapper {
        margin: 15px 10px;
        padding: 20px 14px;
        box-sizing: border-box;
        width: auto;
    }
}