/* Professional LMS - Premium Frontend Styles */

:root {
    /* Color Palette */
    --plms-primary: #003366;
    --plms-primary-hover: #002244;
    --plms-secondary: #BD3021;
    --plms-bg: #ffffff;
    --plms-card-bg: #f8fafc;
    --plms-text-main: #0f172a;
    --plms-text-muted: #64748b;
    --plms-border: #e2e8f0;
    --plms-hr-color: #f1f5f9;

    --plms-success: #10b981;
    --plms-success-bg: #ecfdf5;
    --plms-success-fg: #047857;

    --plms-blue-bg: #eff6ff;
    --plms-blue-fg: #3b82f6;

    /* Specs */
    --plms-radius: 16px;
    --plms-radius-sm: 8px;
    --plms-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
    --plms-transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.plms-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 180px 20px 40px 20px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--plms-text-main);
    line-height: 1.5;
}

/* Typography elements */
.plms-section-title {
    font-size: 32px;
    font-weight: 800;
    margin: 0 0 8px 0;
    color: var(--plms-primary);
}

.plms-section-desc {
    color: var(--plms-text-muted);
    font-size: 16px;
    margin: 0 0 30px 0;
}

/* Grid Catalog */
.plms-course-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 30px;
    padding: 0 48px;
    max-width: 1050px;
    margin: 0 auto;
}
@media (min-width: 640px) {
    .plms-course-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 1024px) {
    .plms-course-grid { grid-template-columns: repeat(3, 1fr); }
}

.plms-course-card {
    background: var(--plms-card-bg);
    border: 1px solid var(--plms-border);
    border-radius: var(--plms-radius);
    overflow: hidden;
    transition: var(--plms-transition);
    display: flex;
    flex-direction: column;
    box-shadow: var(--plms-shadow);
}

.plms-course-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

.plms-card-thumbnail-placeholder {
    height: 160px;
    background-color: var(--plms-primary);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
}

.plms-card-thumbnail-placeholder .dashicons {
    font-size: 48px;
    width: 48px;
    height: 48px;
}

.plms-course-card-content {
    padding: 16px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.plms-card-difficulty {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 8px;
    display: inline-block;
}

.plms-diff-beginner { color: #22c55e; }
.plms-diff-intermediate { color: #f97316; }
.plms-diff-advanced { color: #ef4444; }

.plms-card-title {
    font-size: 15px;
    font-weight: 700;
    margin: 0 0 4px 0;
    color: var(--plms-text-main);
    line-height: 1.4;
}

.plms-card-description {
    font-size: 13px;
    color: var(--plms-text-muted);
    margin: 0 0 12px 0;
    flex-grow: 1;
    line-height: 1.5;
}

.plms-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--plms-border);
    padding-top: 15px;
    margin-top: auto;
}

.plms-card-price {
    font-size: 18px;
    font-weight: 700;
    color: var(--plms-text-main);
}

/* Detail Landing Layout */
.plms-course-detail-layout {
    display: grid;
    grid-template-columns: 2.5fr 1fr;
    gap: 40px;
}

@media (max-width: 900px) {
    .plms-course-detail-layout {
        grid-template-columns: 1fr;
    }
}

.plms-course-title {
    font-size: 36px;
    font-weight: 800;
    margin: 0 0 16px 0;
    color: var(--plms-text-main);
}

.plms-course-meta-bar {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
}

.plms-meta-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--plms-text-muted);
}

.plms-meta-tag .dashicons {
    font-size: 16px;
    width: 16px;
    height: 16px;
}

.plms-course-body h2, .plms-curriculum-section h2 {
    font-size: 22px;
    font-weight: 700;
    margin: 0 0 15px 0;
    color: var(--plms-text-main);
}

.plms-description-content {
    font-size: 15px;
    color: var(--plms-text-muted);
    line-height: 1.7;
    margin-bottom: 40px;
}

/* Sidebar Box */
.plms-enroll-card {
    background-color: var(--plms-card-bg);
    border: 1px solid var(--plms-border);
    border-radius: var(--plms-radius);
    padding: 30px;
    box-shadow: var(--plms-shadow);
    position: sticky;
    top: 30px;
}

.plms-card-price-box {
    margin-bottom: 20px;
}

.plms-price-label {
    font-size: 12px;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--plms-text-muted);
}

.plms-price-value {
    font-size: 36px;
    font-weight: 800;
    margin: 4px 0 0 0;
    color: var(--plms-text-main);
}

.plms-btn-block {
    width: 100%;
    justify-content: center;
    box-sizing: border-box;
    text-align: center;
}

.plms-form-desc-center {
    font-size: 11px;
    color: var(--plms-text-muted);
    text-align: center;
    margin: 10px 0 0 0;
}

/* Curriculum accordions */
.plms-curriculum-accordion {
    border: 1px solid var(--plms-border);
    border-radius: var(--plms-radius-sm);
    overflow: hidden;
}

.plms-module-row {
    border-bottom: 1px solid var(--plms-border);
}

.plms-module-row:last-child {
    border-bottom: none;
}

.plms-module-head {
    background-color: var(--plms-card-bg);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    user-select: none;
    transition: background-color 0.15s ease;
}

.plms-module-head:hover {
    background-color: #eef2f7;
}

.plms-module-head .dashicons {
    color: var(--plms-text-muted);
    font-size: 16px;
    width: 16px;
    height: 16px;
}

.plms-module-head h3 {
    margin: 0;
    font-size: 15px;
    font-weight: 700;
    color: var(--plms-text-main);
}

.plms-module-lessons-list {
    padding: 5px 20px 20px 48px;
    display: none;
}

.plms-lesson-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 0;
    border-bottom: 1px dashed var(--plms-border);
}

.plms-lesson-item:last-child {
    border-bottom: none;
}

.plms-lesson-icon {
    color: var(--plms-primary);
}

.plms-lesson-title {
    font-size: 14px;
    color: var(--plms-text-main);
}

.plms-lesson-meta {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 10px;
}

.plms-preview-badge {
    background-color: var(--plms-blue-bg);
    color: var(--plms-blue-fg);
    font-size: 11px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 4px;
}

.plms-lesson-duration {
    font-size: 12px;
    color: var(--plms-text-muted);
}

/* ==========================================================================
   PREMIUM COURSE PLAYER (FULL-SCREEN LAYOUT)
   ========================================================================== */
.plms-player-container {
    display: grid;
    grid-template-columns: 320px 1fr;
    height: calc(100vh - 32px); /* Offsets WP Admin bar */
    position: fixed;
    top: 32px;
    left: 0;
    width: 100vw;
    z-index: 9999;
    background-color: var(--plms-bg);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

@media (max-width: 768px) {
    .plms-player-container {
        grid-template-columns: 1fr;
    }
    .plms-player-sidebar {
        display: none; /* Hide syllabus on small screens by default */
    }
}

/* Sidebar syllabus */
.plms-player-sidebar {
    background-color: var(--plms-card-bg);
    border-right: 1px solid var(--plms-border);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.plms-player-sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--plms-border);
}

.plms-player-sidebar-header h3 {
    margin: 0 0 15px 0;
    font-size: 16px;
    font-weight: 700;
    color: var(--plms-text-main);
}

.plms-player-progress-bar {
    height: 6px;
    background-color: var(--plms-border);
    border-radius: 3px;
    overflow: hidden;
}

.plms-player-progress-fill {
    height: 100%;
    background-color: var(--plms-success);
    transition: width 0.3s ease;
}

.plms-player-progress-text {
    font-size: 11px;
    color: var(--plms-text-muted);
    font-weight: 600;
    display: block;
    margin-top: 6px;
}

.plms-player-syllabus {
    flex-grow: 1;
    overflow-y: auto;
}

.plms-player-module {
    border-bottom: 1px solid var(--plms-border);
}

.plms-player-module-head {
    background-color: rgba(0, 0, 0, 0.02);
    padding: 14px 20px;
}

.plms-player-module-head h4 {
    margin: 0;
    font-size: 13px;
    font-weight: 700;
    color: var(--plms-text-muted);
}

.plms-player-lesson-item {
    display: block;
    border-bottom: 1px dashed var(--plms-border);
    padding: 10px 10px 10px 20px;
}

.plms-player-lesson-item:last-child {
    border-bottom: none;
}

.plms-player-lesson-item.active {
    background-color: var(--plms-blue-bg);
}

.plms-player-lesson-item.active a {
    color: var(--plms-blue-fg) !important;
}

.plms-player-checkbox-box {
    display: inline-block;
    vertical-align: middle;
    margin-right: 8px;
}

.plms-toggle-complete-checkbox {
    width: 16px;
    height: 16px;
    cursor: pointer;
    margin: 0;
}

.plms-player-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--plms-text-main);
    font-size: 13px;
    font-weight: 500;
    vertical-align: middle;
    max-width: 80%;
}

.plms-player-link .dashicons {
    font-size: 16px;
    width: 16px;
    height: 16px;
}

/* Topics list nested */
.plms-player-topics-list {
    margin-top: 10px;
    margin-left: 20px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    border-left: 2px solid var(--plms-border);
    padding-left: 10px;
}

.plms-player-topic-item {
    padding: 4px 0;
}

.plms-player-topic-item.active a {
    color: var(--plms-blue-fg) !important;
}

/* Main content area */
.plms-player-display {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow-y: auto;
}

.plms-player-header {
    height: 64px;
    border-bottom: 1px solid var(--plms-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    box-sizing: border-box;
}

.plms-player-breadcrumbs {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
}

.plms-crumb-module { color: var(--plms-text-muted); }
.plms-crumb-lesson { color: var(--plms-text-main); }
.plms-player-breadcrumbs .dashicons { font-size: 14px; width: 14px; height: 14px; color: var(--plms-text-muted); }

.plms-player-header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.plms-player-action-btn {
    background: transparent;
    border: 1px solid var(--plms-border);
    padding: 8px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    color: var(--plms-text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

.plms-player-action-btn:hover, .plms-player-action-btn.active {
    color: var(--plms-primary);
    border-color: var(--plms-primary);
}

.plms-player-close-btn {
    color: var(--plms-text-muted);
    font-size: 24px;
    text-decoration: none;
}

/* Content wrapper */
.plms-player-content {
    flex-grow: 1;
    overflow-y: auto;
    padding: 40px;
    max-width: 900px;
    margin: 0 auto;
    width: 100%;
    box-sizing: border-box;
}

/* Video Responsive Box */
.plms-player-video-wrapper {
    position: relative;
    padding-bottom: 56.25%; /* 16:9 ratio */
    height: 0;
    overflow: hidden;
    border-radius: var(--plms-radius-sm);
    box-shadow: var(--plms-shadow);
    margin-bottom: 35px;
    background-color: #000000;
}

.plms-player-video-wrapper iframe, .plms-player-video-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.plms-player-text-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    border-bottom: 1px solid var(--plms-border);
    padding-bottom: 15px;
    margin-bottom: 25px;
}

.plms-player-text-header h2 {
    font-size: 24px;
    font-weight: 800;
    margin: 0;
}

.plms-duration-badge {
    background-color: var(--plms-card-bg);
    color: var(--plms-text-muted);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.plms-duration-badge .dashicons {
    font-size: 14px;
    width: 14px;
    height: 14px;
}

.plms-player-text-body {
    font-size: 16px;
    color: var(--plms-text-main);
    line-height: 1.8;
}

/* Player Navigation footer */
.plms-player-footer {
    height: 72px;
    border-top: 1px solid var(--plms-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 30px;
    box-sizing: border-box;
}

.plms-btn-nav {
    border: 1px solid var(--plms-border);
    color: var(--plms-text-main);
    background: transparent;
}

.plms-btn-nav:hover {
    background-color: var(--plms-card-bg);
}

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

.plms-btn-success:hover {
    background-color: var(--plms-success-fg);
}

/* Welcome Player State */
.plms-player-welcome {
    text-align: center;
    margin: auto;
    color: var(--plms-text-muted);
}

.plms-player-welcome .dashicons {
    font-size: 64px;
    width: 64px;
    height: 64px;
    color: var(--plms-primary);
    margin-bottom: 15px;
}

.plms-player-welcome h2 {
    margin: 0 0 8px 0;
    color: var(--plms-text-main);
}

/* ==========================================================================
   STUDENT DASHBOARD
   ========================================================================== */
.plms-student-courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.plms-dashboard-course-card {
    background-color: var(--plms-card-bg);
    border: 1px solid var(--plms-border);
    border-radius: var(--plms-radius-sm);
    padding: 20px;
    box-shadow: var(--plms-shadow);
}

.plms-progress-wrapper {
    margin: 15px 0;
}

.plms-progress-bar {
    height: 8px;
    background-color: var(--plms-border);
    border-radius: 4px;
    overflow: hidden;
}

.plms-progress-fill {
    height: 100%;
    background-color: var(--plms-primary);
}

.plms-progress-text {
    font-size: 11px;
    color: var(--plms-text-muted);
    font-weight: 600;
    display: block;
    margin-top: 6px;
}

/* ==========================================================================
   INSTRUCTOR STYLES
   ========================================================================== */
.plms-instructor-register-card {
    max-width: 600px;
    margin: 40px auto;
    background: var(--plms-card-bg);
    border: 1px solid var(--plms-border);
    border-radius: var(--plms-radius);
    padding: 40px;
    box-shadow: var(--plms-shadow);
}

.plms-form-group-checkbox {
    margin-top: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.plms-form-group-checkbox input {
    margin: 0;
    cursor: pointer;
}

.plms-dashboard-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.plms-stat-card {
    background: var(--plms-card-bg);
    border: 1px solid var(--plms-border);
    border-radius: var(--plms-radius-sm);
    padding: 24px;
    box-shadow: var(--plms-shadow);
}

.plms-stat-title {
    font-size: 12px;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--plms-text-muted);
    display: block;
    margin-bottom: 6px;
}

.plms-stat-value {
    font-size: 32px;
    font-weight: 800;
    margin: 0;
    color: var(--plms-text-main);
}

.plms-status-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
}

.plms-status-published {
    background-color: var(--plms-success-bg);
    color: var(--plms-success-fg);
}

.plms-status-draft {
    background-color: var(--plms-border);
    color: var(--plms-text-muted);
}

/* ===== Student Dashboard ===== */
.plms-student-dashboard {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.plms-dashboard-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    background: linear-gradient(135deg, #003366 0%, #00509e 100%);
    padding: 36px 40px;
    border-radius: 20px;
    color: #fff;
    box-shadow: 0 10px 30px rgba(0, 51, 102, 0.3);
}

.plms-dashboard-header h1 {
    font-size: 28px;
    font-weight: 800;
    color: #fff;
    margin: 0 0 6px 0;
}

.plms-dashboard-header .plms-subtitle {
    color: rgba(255,255,255,0.8);
    font-size: 15px;
    margin: 0;
}

.plms-dashboard-header .plms-btn-primary {
    background: #fff !important;
    color: #003366 !important;
    border: none !important;
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
    white-space: nowrap;
    flex-shrink: 0;
}

.plms-dashboard-header .plms-btn-primary:hover {
    background: #f1f5f9 !important;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.plms-settings-container {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 24px;
    align-items: start;
}

@media (max-width: 768px) {
    .plms-settings-container {
        grid-template-columns: 1fr;
    }
    .plms-dashboard-header {
        padding: 24px 20px;
    }
}

.plms-settings-tabs {
    list-style: none;
    margin: 0;
    padding: 0;
    background: #fff;
    border-radius: 16px;
    box-shadow: var(--plms-shadow);
    overflow: hidden;
    border: 1px solid var(--plms-border);
}

.plms-settings-tabs li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 16px 20px;
    font-size: 14px;
    font-weight: 600;
    color: var(--plms-text-muted);
    cursor: pointer;
    border-left: 3px solid transparent;
    transition: var(--plms-transition);
}

.plms-settings-tabs li:hover {
    background: var(--plms-card-bg);
    color: var(--plms-primary);
}

.plms-settings-tabs li.active {
    background: var(--plms-card-bg);
    color: var(--plms-primary);
    border-left-color: var(--plms-primary);
}

.plms-dashboard-content .plms-card {
    background: #fff;
    border-radius: 16px;
    padding: 28px;
    box-shadow: var(--plms-shadow);
    border: 1px solid var(--plms-border);
}

.plms-dashboard-content .plms-card h2 {
    font-size: 18px;
    font-weight: 700;
    color: var(--plms-primary);
    margin: 0 0 4px 0;
}

.plms-student-courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.plms-dashboard-course-card {
    background: var(--plms-card-bg);
    border: 1px solid var(--plms-border);
    border-radius: 14px;
    overflow: hidden;
    transition: var(--plms-transition);
}

.plms-dashboard-course-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.08);
}

.plms-dashboard-course-card .plms-card-content {
    padding: 20px;
}

.plms-dashboard-course-card h3 {
    font-size: 15px;
    font-weight: 700;
    color: var(--plms-text-main);
    margin: 0 0 12px 0;
    line-height: 1.4;
}

.plms-progress-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 4px;
}

.plms-progress-bar {
    flex: 1;
    height: 8px;
    background: var(--plms-border);
    border-radius: 99px;
    overflow: hidden;
}

.plms-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #003366, #0ea5e9);
    border-radius: 99px;
    transition: width 0.6s ease;
}

.plms-progress-text {
    font-size: 12px;
    font-weight: 700;
    color: var(--plms-text-muted);
    white-space: nowrap;
}

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

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