/**
 * Purbayan LMS Frontend Stylesheet
 * Institutional & Academic Styling for Purbayan Educational Institution
 */

:root {
    --purbayan-primary: #1e3a8a;
    --purbayan-primary-hover: #1e40af;
    --purbayan-accent: #0f766e;
    --purbayan-accent-hover: #115e59;
    --purbayan-bg: #f8fafc;
    --purbayan-card-bg: #ffffff;
    --purbayan-text: #1e293b;
    --purbayan-text-muted: #64748b;
    --purbayan-border: #e2e8f0;
    --purbayan-radius: 12px;
    --purbayan-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --purbayan-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
}

.purbayan-lms-container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
    font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    color: var(--purbayan-text);
    box-sizing: border-box;
}

/* ==========================================================================
   Buttons & Pills
   ========================================================================== */
.btn-purbayan {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    text-decoration: none;
    border: none;
    transition: all 0.2s ease-in-out;
}

.btn-purbayan.btn-primary {
    background-color: var(--purbayan-primary);
    color: #ffffff !important;
}

.btn-purbayan.btn-primary:hover {
    background-color: var(--purbayan-primary-hover);
    transform: translateY(-1px);
}

.btn-purbayan.btn-secondary {
    background-color: var(--purbayan-accent);
    color: #ffffff !important;
}

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

.btn-purbayan.btn-outline {
    background: transparent;
    border: 1px solid var(--purbayan-border);
    color: var(--purbayan-text);
}

.btn-purbayan.btn-outline:hover {
    background: #f1f5f9;
}

.btn-purbayan.btn-enrolled {
    background-color: #ecfdf5;
    color: #065f46 !important;
    border: 1px solid #a7f3d0;
}

.btn-purbayan.btn-pending {
    background-color: #fffbeb;
    color: #92400e !important;
    border: 1px solid #fde68a;
    cursor: default;
}

.btn-purbayan.btn-block {
    display: flex;
    width: 100%;
}

.btn-purbayan.btn-large {
    padding: 14px 28px;
    font-size: 16px;
}

.btn-purbayan.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.purbayan-pill {
    display: inline-block;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 9999px;
}

.purbayan-pill.pill-active,
.purbayan-pill.pill-completed {
    background: #dcfce7;
    color: #166534;
}

.purbayan-pill.pill-pending {
    background: #fef3c7;
    color: #92400e;
}

.purbayan-pill.pill-urgent {
    background: #fee2e2;
    color: #991b1b;
}

.purbayan-pill.pill-important {
    background: #ffedd5;
    color: #9a3412;
}

/* ==========================================================================
   Catalog & Course Cards
   ========================================================================== */
.purbayan-catalog-header {
    text-align: center;
    margin-bottom: 35px;
}

.purbayan-catalog-header h2 {
    font-size: 32px;
    font-weight: 800;
    color: var(--purbayan-primary);
    margin-bottom: 8px;
}

.purbayan-catalog-header p {
    color: var(--purbayan-text-muted);
    font-size: 16px;
}

.purbayan-category-filter {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.filter-btn {
    padding: 8px 18px;
    border-radius: 20px;
    border: 1px solid var(--purbayan-border);
    background: #ffffff;
    font-weight: 600;
    font-size: 13px;
    color: var(--purbayan-text-muted);
    cursor: pointer;
    transition: all 0.2s;
}

.filter-btn.active, .filter-btn:hover {
    background: var(--purbayan-primary);
    color: #ffffff;
    border-color: var(--purbayan-primary);
}

.purbayan-course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 28px;
}

.purbayan-course-card {
    background: var(--purbayan-card-bg);
    border: 1px solid var(--purbayan-border);
    border-radius: var(--purbayan-radius);
    overflow: hidden;
    box-shadow: var(--purbayan-shadow);
    display: flex;
    flex-direction: column;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.purbayan-course-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--purbayan-shadow-lg);
}

.purbayan-course-thumb {
    position: relative;
    height: 190px;
    background: #e2e8f0;
    overflow: hidden;
}

.purbayan-course-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.thumb-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    background: linear-gradient(135deg, #1e3a8a, #0f766e);
    color: #ffffff;
}

.thumb-placeholder .dashicons {
    font-size: 48px;
    width: 48px;
    height: 48px;
    margin-bottom: 6px;
}

.purbayan-card-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    background: #b45309;
    color: #ffffff;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 6px;
    letter-spacing: 0.5px;
}

.purbayan-card-badge.completed {
    background: #15803d;
}

.purbayan-course-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.course-meta-top {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--purbayan-text-muted);
    font-weight: 600;
    margin-bottom: 8px;
}

.course-code {
    background: #eff6ff;
    color: #1d4ed8;
    padding: 2px 6px;
    border-radius: 4px;
}

.course-title {
    font-size: 18px;
    font-weight: 700;
    line-height: 1.4;
    margin: 0 0 10px;
}

.course-title a {
    color: var(--purbayan-text);
    text-decoration: none;
    transition: color 0.2s;
}

.course-title a:hover {
    color: var(--purbayan-primary);
}

.course-excerpt {
    font-size: 14px;
    color: var(--purbayan-text-muted);
    line-height: 1.5;
    margin-bottom: 16px;
    flex-grow: 1;
}

.course-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid var(--purbayan-border);
    padding-top: 14px;
    margin-top: auto;
}

.course-faculty {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 500;
    color: var(--purbayan-text);
}

.course-faculty img {
    border-radius: 50%;
}

/* ==========================================================================
   Progress Bar
   ========================================================================== */
.purbayan-progress-bar-wrap {
    background: #e2e8f0;
    height: 8px;
    border-radius: 9999px;
    overflow: hidden;
    margin: 8px 0;
}

.purbayan-progress-bar {
    background: linear-gradient(90deg, #0f766e, #10b981);
    height: 100%;
    border-radius: 9999px;
    transition: width 0.4s ease;
}

/* ==========================================================================
   Single Course View
   ========================================================================== */
.purbayan-hero-header {
    display: grid;
    grid-template-columns: 2fr 1.2fr;
    gap: 40px;
    background: #ffffff;
    border: 1px solid var(--purbayan-border);
    border-radius: var(--purbayan-radius);
    padding: 35px;
    box-shadow: var(--purbayan-shadow);
    margin-bottom: 35px;
}

.purbayan-breadcrumb {
    font-size: 13px;
    color: var(--purbayan-text-muted);
    margin-bottom: 12px;
}

.purbayan-breadcrumb a {
    color: var(--purbayan-primary);
    text-decoration: none;
}

.purbayan-course-title {
    font-size: 34px;
    font-weight: 800;
    color: var(--purbayan-text);
    margin: 8px 0 12px;
    line-height: 1.2;
}

.purbayan-course-tagline {
    font-size: 16px;
    color: var(--purbayan-text-muted);
    line-height: 1.6;
    margin-bottom: 20px;
}

.purbayan-meta-ribbon {
    display: flex;
    gap: 20px;
    font-size: 14px;
    color: var(--purbayan-text);
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.purbayan-meta-ribbon .meta-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.purbayan-instructor-pill {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: #f8fafc;
    border: 1px solid var(--purbayan-border);
    padding: 8px 16px;
    border-radius: 50px;
}

.purbayan-instructor-pill img {
    border-radius: 50%;
}

.inst-role {
    font-size: 11px;
    text-transform: uppercase;
    color: var(--purbayan-text-muted);
    display: block;
}

.inst-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--purbayan-text);
}

.purbayan-enroll-card {
    background: #ffffff;
    border: 1px solid var(--purbayan-border);
    border-radius: var(--purbayan-radius);
    overflow: hidden;
    box-shadow: var(--purbayan-shadow-lg);
}

.purbayan-hero-img img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.enroll-card-body {
    padding: 24px;
}

.enroll-fee-display {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--purbayan-border);
}

.fee-lbl {
    font-size: 14px;
    color: var(--purbayan-text-muted);
}

.fee-val {
    font-size: 20px;
    font-weight: 800;
    color: var(--purbayan-primary);
}

.enrolled-status-box {
    text-align: center;
}

.enrolled-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #15803d;
    font-weight: 700;
    font-size: 14px;
    margin-bottom: 10px;
}

.progress-txt {
    font-size: 13px;
    font-weight: 600;
    color: var(--purbayan-text-muted);
    display: block;
    margin-bottom: 15px;
}

.purbayan-content-card {
    background: #ffffff;
    border: 1px solid var(--purbayan-border);
    border-radius: var(--purbayan-radius);
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: var(--purbayan-shadow);
}

.purbayan-content-card h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--purbayan-primary);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid #f1f5f9;
}

.purbayan-lesson-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.purbayan-lesson-row {
    display: flex;
    align-items: center;
    padding: 14px 18px;
    border: 1px solid var(--purbayan-border);
    border-radius: 8px;
    background: #ffffff;
    transition: background 0.2s;
}

.purbayan-lesson-row:hover {
    background: #f8fafc;
}

.purbayan-lesson-row.is-completed {
    border-left: 4px solid #10b981;
}

.lesson-num {
    width: 32px;
    height: 32px;
    background: #f1f5f9;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 13px;
    color: var(--purbayan-primary);
    margin-right: 15px;
}

.lesson-title-area {
    flex-grow: 1;
}

.lesson-link {
    font-weight: 600;
    font-size: 15px;
    color: var(--purbayan-text);
    text-decoration: none;
}

.lesson-link:hover {
    color: var(--purbayan-primary);
}

.lesson-locked-title {
    font-size: 15px;
    color: var(--purbayan-text-muted);
}

.preview-badge {
    background: #e0f2fe;
    color: #0369a1;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 4px;
    margin-left: 10px;
}

.lesson-check-status.completed {
    color: #10b981;
    font-size: 20px;
}

/* Assignments on Single Course */
.purbayan-assignment-card {
    border: 1px solid var(--purbayan-border);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 16px;
    background: #f8fafc;
}

.asg-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.asg-header h4 {
    margin: 0;
    font-size: 16px;
    color: var(--purbayan-primary);
}

.asg-meta {
    font-size: 12px;
    color: var(--purbayan-text-muted);
    display: flex;
    gap: 12px;
}

/* ==========================================================================
   Classroom View
   ========================================================================== */
.purbayan-lms-classroom {
    max-width: 1350px;
    margin: 20px auto;
    padding: 0 20px;
    font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
}

.classroom-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #ffffff;
    border: 1px solid var(--purbayan-border);
    border-radius: var(--purbayan-radius);
    padding: 16px 24px;
    margin-bottom: 24px;
    box-shadow: var(--purbayan-shadow);
}

.topbar-left .back-link {
    color: var(--purbayan-text-muted);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
}

.topbar-left .back-link:hover {
    color: var(--purbayan-primary);
}

.topbar-title {
    text-align: center;
}

.inst-tag {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 700;
    color: var(--purbayan-accent);
    display: block;
}

.topbar-title h2 {
    font-size: 20px;
    font-weight: 800;
    margin: 2px 0 0;
}

.btn-toggle-progress.completed {
    background: #10b981;
    color: #fff;
}

.classroom-body {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 25px;
}

.classroom-video-player {
    background: #000;
    border-radius: var(--purbayan-radius);
    overflow: hidden;
    margin-bottom: 25px;
    box-shadow: var(--purbayan-shadow-lg);
}

.video-responsive {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 */
    height: 0;
    overflow: hidden;
}

.video-responsive iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.html5-video {
    width: 100%;
    display: block;
}

.classroom-attachment-box {
    display: flex;
    align-items: center;
    gap: 15px;
    background: #eff6ff;
    border: 1px dashed #93c5fd;
    border-radius: 8px;
    padding: 18px;
    margin-top: 25px;
}

.classroom-attachment-box .dashicons {
    font-size: 36px;
    width: 36px;
    height: 36px;
    color: #1d4ed8;
}

.classroom-nav-footer {
    display: flex;
    justify-content: space-between;
    margin-top: 25px;
}

/* Classroom Sidebar */
.classroom-sidebar {
    background: #ffffff;
    border: 1px solid var(--purbayan-border);
    border-radius: var(--purbayan-radius);
    box-shadow: var(--purbayan-shadow);
    height: fit-content;
    max-height: 85vh;
    overflow-y: auto;
}

.sidebar-header {
    padding: 18px 20px;
    border-bottom: 1px solid var(--purbayan-border);
    background: #f8fafc;
}

.sidebar-header h4 {
    margin: 0;
    font-size: 16px;
    font-weight: 700;
}

.sidebar-header .count {
    font-size: 12px;
    color: var(--purbayan-text-muted);
}

.sidebar-lesson-list {
    display: flex;
    flex-direction: column;
}

.sidebar-lesson-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    border-bottom: 1px solid #f1f5f9;
    text-decoration: none;
    color: var(--purbayan-text);
    transition: background 0.15s;
}

.sidebar-lesson-item:hover {
    background: #f8fafc;
}

.sidebar-lesson-item.active {
    background: #eff6ff;
    border-left: 4px solid var(--purbayan-primary);
    font-weight: 700;
}

.sidebar-lesson-item.done .item-status {
    color: #10b981;
}

.item-title {
    font-size: 13px;
    line-height: 1.4;
    display: block;
}

.item-dur {
    font-size: 11px;
    color: var(--purbayan-text-muted);
}

/* ==========================================================================
   Student Dashboard
   ========================================================================== */
.purbayan-dash-header {
    background: linear-gradient(135deg, #1e3a8a, #0f766e);
    color: #ffffff;
    border-radius: var(--purbayan-radius);
    padding: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    box-shadow: var(--purbayan-shadow-lg);
}

.student-profile-info {
    display: flex;
    align-items: center;
    gap: 20px;
}

.student-avatar img {
    border-radius: 50%;
    border: 3px solid rgba(255, 255, 255, 0.4);
}

.student-meta h2 {
    color: #ffffff;
    margin: 0 0 6px;
    font-size: 26px;
}

.inst-name {
    margin: 0;
    opacity: 0.9;
    font-size: 14px;
}

.student-stats-summary {
    display: flex;
    gap: 15px;
}

.stat-pill {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: 10px;
    padding: 12px 20px;
    text-align: center;
}

.stat-pill .num {
    font-size: 24px;
    font-weight: 800;
    display: block;
}

.stat-pill .lbl {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    opacity: 0.9;
}

.purbayan-dash-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 25px;
    border-bottom: 2px solid var(--purbayan-border);
    padding-bottom: 8px;
}

.dash-tab-btn {
    background: transparent;
    border: none;
    font-size: 15px;
    font-weight: 600;
    color: var(--purbayan-text-muted);
    padding: 10px 18px;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
}

.dash-tab-btn.active {
    background: #eff6ff;
    color: var(--purbayan-primary);
}

.dash-tab-content {
    display: none;
}

.dash-tab-content.active {
    display: block;
}

.purbayan-table {
    width: 100%;
    border-collapse: collapse;
    background: #ffffff;
    border-radius: var(--purbayan-radius);
    overflow: hidden;
    box-shadow: var(--purbayan-shadow);
}

.purbayan-table th {
    background: #f8fafc;
    text-align: left;
    padding: 14px 18px;
    font-size: 13px;
    font-weight: 700;
    color: var(--purbayan-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--purbayan-border);
}

.purbayan-table td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--purbayan-border);
    font-size: 14px;
}

.purbayan-grade-badge {
    background: #dcfce7;
    color: #166534;
    font-weight: 800;
    padding: 4px 10px;
    border-radius: 6px;
}

/* ==========================================================================
   Notice Board
   ========================================================================== */
.purbayan-notice-board {
    background: #ffffff;
    border: 1px solid var(--purbayan-border);
    border-radius: var(--purbayan-radius);
    padding: 25px;
    box-shadow: var(--purbayan-shadow);
}

.notice-board-header {
    border-bottom: 2px solid #f1f5f9;
    padding-bottom: 14px;
    margin-bottom: 20px;
}

.notice-board-header h3 {
    margin: 0;
    font-size: 20px;
    color: var(--purbayan-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.notice-board-header .sub {
    font-size: 12px;
    color: var(--purbayan-text-muted);
}

.purbayan-notice-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.purbayan-notice-item {
    display: flex;
    gap: 18px;
    padding: 16px;
    border-radius: 8px;
    border: 1px solid var(--purbayan-border);
    background: #f8fafc;
    transition: transform 0.2s;
}

.purbayan-notice-item:hover {
    transform: translateX(4px);
}

.purbayan-notice-item.priority-urgent {
    border-left: 4px solid #ef4444;
    background: #fef2f2;
}

.purbayan-notice-item.priority-important {
    border-left: 4px solid #f59e0b;
}

.notice-date-badge {
    min-width: 50px;
    height: 55px;
    background: var(--purbayan-primary);
    color: #ffffff;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.notice-date-badge .day {
    font-size: 18px;
    font-weight: 800;
    line-height: 1;
}

.notice-date-badge .month {
    font-size: 10px;
    text-transform: uppercase;
}

.notice-content-area {
    flex-grow: 1;
}

.notice-title-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 6px;
}

.notice-title {
    margin: 0;
    font-size: 16px;
    font-weight: 700;
}

.notice-text {
    font-size: 14px;
    color: var(--purbayan-text);
    line-height: 1.5;
}

/* Responsive Breakpoints */
@media (max-width: 900px) {
    .purbayan-hero-header {
        grid-template-columns: 1fr;
    }
    .classroom-body {
        grid-template-columns: 1fr;
    }
    .student-profile-info {
        flex-direction: column;
        text-align: center;
    }
    .purbayan-dash-header {
        flex-direction: column;
        gap: 20px;
    }
}