/* ============================================
   Educational Website Theme - Custom Variables
   ============================================ */
:root {
	/* Primary Colors - Vibrant Green for growth and learning */
	--edu-primary: #10b981;
	--edu-primary-dark: #059669;
	--edu-primary-light: #34d399;
	--edu-primary-lighter: #d1fae5;
	
	/* Secondary Colors - Teal for balance and success */
	--edu-secondary: #14b8a6;
	--edu-secondary-dark: #0d9488;
	--edu-secondary-light: #5eead4;
	--edu-secondary-lighter: #ccfbf1;
	
	/* Accent Colors - Darker Green for engagement */
	--edu-accent: #047857;
	--edu-accent-light: #059669;
	--edu-accent-lighter: #d1fae5;

	/* Success (used for Bootstrap-style success buttons) - aligned to #198754 */
	--edu-success: #198754;
	--edu-success-dark: #157347;
	
	/* Warning/Attention - Warm Orange */
	--edu-warning: #f59e0b;
	--edu-warning-light: #fbbf24;
	
	/* Background Colors */
	--edu-bg-main: #ffffff;
	--edu-bg-secondary: #f8fafc;
	--edu-bg-tertiary: #f1f5f9;
	
	/* Text Colors */
	--edu-text-primary: #1e293b;
	--edu-text-secondary: #64748b;
	--edu-text-muted: #94a3b8;
	
	/* Border & Shadow */
	--edu-border: #e2e8f0;
	--edu-shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
	--edu-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
	--edu-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
}

html {
	font-size: 18px;
}

body {
	background: var(--edu-bg-secondary);
	color: var(--edu-text-primary);
}

.edu-container {
	max-width: 1400px;
}

.edu-container-full {
	max-width: none;
}

/* ============================================
   Card & Interactive Elements
   ============================================ */
.card {
	border: 1px solid var(--edu-border);
	border-radius: 0.75rem;
	box-shadow: var(--edu-shadow-sm);
	transition: all 0.3s ease;
}

.card:hover {
	box-shadow: var(--edu-shadow-md);
}

.card-header {
	background: linear-gradient(135deg, var(--edu-primary-lighter) 0%, var(--edu-bg-main) 100%);
	border-bottom: 1px solid var(--edu-border);
	font-weight: 600;
	color: var(--edu-primary-dark);
}

.btn-primary {
	background: var(--edu-primary) !important;
	border-color: var(--edu-primary) !important;
	transition: all 0.3s ease;
}

.btn-primary:hover {
	background: var(--edu-primary-dark) !important;
	border-color: var(--edu-primary-dark) !important;
	transform: translateY(-1px);
	box-shadow: var(--edu-shadow-sm);
}

/* Specific targeting for login and register form buttons */
.btn.btn-primary.w-100,
.btn.btn-primary.btn-sm {
	background: var(--edu-primary) !important;
	border-color: var(--edu-primary) !important;
}

.btn.btn-primary.w-100:hover,
.btn.btn-primary.btn-sm:hover {
	background: var(--edu-primary-dark) !important;
	border-color: var(--edu-primary-dark) !important;
}

.btn-success {
	background: var(--edu-success);
	border-color: var(--edu-success);
}

.btn-success:hover {
	background: var(--edu-success-dark);
	border-color: var(--edu-success-dark);
}

/* Override outline-success to use consistent green (rgb(25,135,84))
   - text and border use the green
   - hover/focus/active use filled green background with white text */
.btn-outline-success {
	color: var(--edu-success) !important;
	border-color: var(--edu-success) !important;
}
.btn-outline-success:hover,
.btn-outline-success:focus,
.btn-outline-success:active,
.btn-outline-success.active,
.btn-outline-success.show {
	color: #ffffff !important;
	background-color: var(--edu-success) !important;
	border-color: var(--edu-success) !important;
}
.btn-outline-success:focus {
	box-shadow: 0 0 0 0.2rem rgba(25,135,84,0.25) !important;
}

.badge {
	padding: 0.35rem 0.65rem;
	font-weight: 600;
	border-radius: 0.375rem;
}

.badge.bg-primary {
	background: var(--edu-primary) !important;
}

.badge.bg-success {
	background: var(--edu-secondary) !important;
}

.alert {
	border-radius: 0.5rem;
	border: none;
	box-shadow: var(--edu-shadow-sm);
}

.alert-info {
	background: var(--edu-primary-lighter);
	color: var(--edu-primary-dark);
}

.alert-success {
	background: var(--edu-secondary-lighter);
	color: var(--edu-secondary-dark);
}

.text-primary {
	color: var(--edu-primary) !important;
}

.text-success {
	color: var(--edu-secondary) !important;
}

.bg-primary {
	background: var(--edu-primary) !important;
}

.bg-light {
	background: var(--edu-bg-secondary) !important;
}

/* Links */
a {
	color: var(--edu-primary);
	text-decoration: none;
	transition: color 0.2s ease;
}

a:hover {
	color: var(--edu-primary-dark);
}

/* Quill editor layout fixes: keep toolbar and container in normal flow
	 so the editor pushes following content instead of overlapping it. */
/* Ensure Quill toolbar and container remain in normal flow
	 and cannot be positioned over following form controls. */
#study-guide-editor,
#study-guide-editor .ql-container,
#study-guide-editor .ql-toolbar {
	position: static !important;
}

#study-guide-editor {
	min-height: 240px !important;
	margin-bottom: 1rem !important;
}

#study-guide-editor .ql-container {
	overflow: auto !important;
	box-sizing: border-box !important;
}

#study-guide-editor .ql-editor {
	min-height: 240px !important;
	box-sizing: border-box !important;
	white-space: pre-wrap !important;
}

.ql-container.ql-snow {
	border: 1px solid #ced4da;
	border-radius: 4px;
}

/* Extra safety: force the Quill container to occupy layout space
	 and clear any floats that may cause following inputs to overlap. */
#study-guide-editor::after {
	content: "";
	display: block;
	clear: both;
}

#study-guide-editor,
#study-guide-editor .ql-container {
	position: relative !important;
}

/* Set a concrete height for the editing area so it reliably pushes
	 the following grid columns down (adjust if too tall). */
#study-guide-editor .ql-container {
	height: 420px !important;
}

#study-guide-editor .ql-editor {
	min-height: 360px !important;
}

/* Mindmaps thumbnail row for admin content form */
.mindmaps-row {
	display: flex;
	gap: 8px;
	align-items: center;
	flex-wrap: nowrap;
	overflow-x: auto;
	padding: 4px 0;
}

.mindmaps-row a {
	display: inline-block;
}

.mindmap-thumb {
	width: 56px;
	height: 56px;
	object-fit: cover;
	border: 1px solid #ddd;
	border-radius: 4px;
	box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
	display: block;
}

/* Sketch notes thumbnail row for admin content form */
.sketchnotes-row {
	display: flex;
	gap: 8px;
	align-items: center;
	flex-wrap: nowrap;
	overflow-x: auto;
	padding: 4px 0;
}

.sketchnotes-row a {
	display: inline-block;
}

.sketchnote-thumb {
	width: 56px;
	height: 56px;
	object-fit: cover;
	border: 1px solid #ddd;
	border-radius: 4px;
	box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
	display: block;
}

/* Layout for chapter page with left recent panel, center content and optional right panel */
.edu-layout {
	display: flex;
	gap: 1rem;
	align-items: flex-start;
}

.recent-panel {
	width: 220px;
	flex: 0 0 220px;
}

.right-panel {
	width: 260px;
	flex: 0 0 260px;
}

/* Make nav tabs sticky at top of the content column */
.edu-layout .nav-tabs {
	position: sticky;
	top: 0;
	z-index: 60;
	background: var(--bs-body-bg);
	margin-bottom: 0.5rem;
}

/* Flashcard styles: premium look */
.edu-flashcard-container {
	perspective: 1000px;
	margin-top: 2rem;
	margin-bottom: 2rem;
}

.edu-flashcard-container .card.flashcard {
	cursor: pointer;
	min-height: 320px;
	border: none;
	background: transparent;
	width: 100%;
	max-width: 600px;
	/* Optimal reading width */
	outline: none;
	/* Remove default outline, we'll use custom focus style */
}

.edu-flashcard-container .card.flashcard:focus-visible {
	box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.5), 0 10px 30px -5px rgba(0, 0, 0, 0.1);
}

.edu-flashcard-container .card.flashcard .card-inner {
	position: relative;
	width: 100%;
	height: 100%;
	min-height: 320px;
	text-align: center;
	transition: transform 0.6s cubic-bezier(0.4, 0.0, 0.2, 1);
	transform-style: preserve-3d;
	box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.1);
	border-radius: 16px;
}

.edu-flashcard-container .card.flashcard.flipped .card-inner {
	transform: rotateY(180deg);
}

.edu-flashcard-container .card-face {
	position: absolute;
	inset: 0;
	backface-visibility: hidden;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	padding: 2rem;
	background: linear-gradient(135deg, var(--edu-bg-main) 0%, var(--edu-primary-lighter) 100%);
	border-radius: 16px;
	border: 2px solid var(--edu-border);
	box-shadow: var(--edu-shadow-md);
}

.edu-flashcard-container .card-front {
	color: var(--edu-text-primary);
}

.edu-flashcard-container .card-back {
	transform: rotateY(180deg);
	background: linear-gradient(135deg, var(--edu-secondary-lighter) 0%, var(--edu-bg-main) 100%);
	color: var(--edu-text-primary);
	border: 2px solid var(--edu-secondary-light);
}

.edu-flashcard-container .card-title-label {
	text-transform: uppercase;
	letter-spacing: 0.1em;
	font-size: 0.75rem;
	font-weight: 600;
	opacity: 0.6;
	margin-bottom: 1rem;
}

.edu-flashcard-container .card-content {
	font-size: 1.35rem;
	line-height: 1.5;
	font-weight: 500;
}

/* Lightbox for infographic preview */
.edu-lightbox {
	position: fixed;
	inset: 0;
	background: rgba(15, 23, 42, 0.95);
	display: flex;
	align-items: center;
	justify-content: center;
	z-index: 9999;
	opacity: 0;
	animation: fadeIn 0.15s ease-out forwards;
}

@keyframes fadeIn {
	from {
		opacity: 0;
	}

	to {
		opacity: 1;
	}
}

.edu-lightbox img {
	max-width: 90vw;
	max-height: 90vh;
	box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3);
	border-radius: 4px;
	transform: scale(0.95);
	animation: zoomIn 0.2s ease-out forwards;
}

@keyframes zoomIn {
	to {
		transform: scale(1);
	}
}

.edu-lightbox .edu-lightbox-close {
	position: absolute;
	top: 24px;
	right: 24px;
	color: #fff;
	background: rgba(255, 255, 255, 0.1);
	border: none;
	width: 44px;
	height: 44px;
	border-radius: 50%;
	font-size: 24px;
	display: flex;
	align-items: center;
	justify-content: center;
	cursor: pointer;
	transition: background 0.2s;
}

.edu-lightbox .edu-lightbox-close:hover {
	background: rgba(255, 255, 255, 0.25);
}

/* Remove right panel reservation to allow full width content */
.edu-layout {
	display: flex;
	gap: 1.5rem;
	align-items: flex-start;
}

.recent-panel {
	width: 260px;
	flex: 0 0 260px;
}

.recent-panel .card {
	border: none;
	background: transparent;
}

.recent-panel .list-group-item {
	border: none;
	padding-left: 0;
	background: transparent;
}

.right-panel {
	display: none;
	/* Hide by default unless specifically needed */
}

/* PDF Viewer Overlay Controls */
[data-role="viewer"] {
	position: relative;
	background: #333;
	/* Dark background for better contrast */
}

.edu-pdf-overlay-btn {
	position: absolute;
	top: 50%;
	transform: translateY(-50%);
	z-index: 10;
	width: 48px;
	height: 48px;
	border-radius: 50%;
	background: rgba(0, 0, 0, 0.5);
	color: #fff;
	border: none;
	display: flex;
	align-items: center;
	justify-content: center;
	cursor: pointer;
	transition: background 0.2s, opacity 0.2s;
	opacity: 0;
	/* Hidden by default, shown on hover/touch or always in fullscreen if preferred */
}

[data-role="viewer"]:hover .edu-pdf-overlay-btn,
[data-role="viewer"]:focus-within .edu-pdf-overlay-btn {
	opacity: 1;
}

.edu-pdf-overlay-btn:hover {
	background: rgba(0, 0, 0, 0.8);
}

.edu-pdf-overlay-btn.prev {
	left: 16px;
}

.edu-pdf-overlay-btn.next {
	right: 16px;
}

.edu-pdf-overlay-btn:disabled {
	opacity: 0;
	pointer-events: none;
}

/* Force canvas to fit container */
[data-role="viewer"] canvas {
	max-width: 100%;
	max-height: 80vh;
	/* Prevent it from becoming too tall */
	width: auto !important;
	/* Let height dictate width if sticking to ratio, or vice versa */
	height: auto !important;
	object-fit: contain;
	margin: 0 auto;
}

[data-role="viewer"] .edu-pdf-spread {
	justify-content: center;
	align-items: center;
	min-height: 400px;
}

/* Flashcard new layout: Button - Card - Button */
.edu-flashcard-wrapper {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 1.5rem;
}

.edu-flashcard-wrapper .card.flashcard {
	flex: 1;
	max-width: 600px;
	margin: 0;
	/* Remove auto margins */
}

.edu-flashcard-btn {
	width: 48px;
	height: 48px;
	border-radius: 50%;
	border: 1px solid #dee2e6;
	background: #fff;
	color: #495057;
	display: flex;
	align-items: center;
	justify-content: center;
	cursor: pointer;
	transition: all 0.2s;
	flex-shrink: 0;
}

.edu-flashcard-btn:hover:not(:disabled) {
	background: #f8f9fa;
	border-color: #ccedff;
	color: #0d6efd;
}

.edu-flashcard-btn:disabled {
	opacity: 0.5;
	cursor: default;
}

/* Responsive flashcards: on mobile, might want buttons below? Keeping side-by-side for now as requested. */
@media (max-width: 576px) {
	.edu-flashcard-wrapper {
		gap: 0.5rem;
	}

	.edu-flashcard-btn {
		width: 36px;
		height: 36px;
	}
}

/* Mind Map Download Button */
.edu-mindmap-figure {
	position: relative;
}

.edu-mindmap-download {
	position: absolute;
	top: 12px;
	left: 12px;
	z-index: 10;
	opacity: 0.85;
	transition: opacity 0.2s ease, transform 0.2s ease;
	box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.edu-mindmap-figure:hover .edu-mindmap-download {
	opacity: 1;
	transform: scale(1.05);
}

.edu-mindmap-download:hover {
	opacity: 1;
	transform: scale(1.1);
}
/* Common utility classes from board.php */
.hover-shadow {
    transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
    border: 1px solid var(--edu-border);
}
.hover-shadow:hover {
    transform: translateY(-4px);
    box-shadow: var(--edu-shadow-lg) !important;
    border-color: var(--edu-primary-light);
}

/* Card minimum height for selection grids */
.edu-selection-card {
    min-height: 100px;
    background: var(--edu-bg-main);
    border-radius: 0.75rem;
}

/* Chapter badge style from book.php */
.chapter-badge {
    min-width: 7rem;
    padding: 0.5rem 0.75rem;
    background: linear-gradient(135deg, var(--edu-primary) 0%, var(--edu-accent) 100%);
    color: white;
    border-radius: 0.5rem;
    font-weight: 600;
    box-shadow: var(--edu-shadow-sm);
}

/* Keyboard hint styling */
.edu-flashcard-container kbd {
	padding: 0.2rem 0.4rem;
	font-size: 0.875em;
	color: var(--edu-text-primary);
	background-color: var(--edu-bg-tertiary);
	border: 1px solid var(--edu-border);
	border-radius: 0.25rem;
	font-family: var(--bs-font-monospace);
	box-shadow: var(--edu-shadow-sm);
}

/* Quiz styles */
.correct { 
	color: var(--edu-secondary-dark); 
	font-weight: bold;
	background: var(--edu-secondary-lighter);
	padding: 0.25rem 0.5rem;
	border-radius: 0.25rem;
}
.incorrect { 
	color: #dc2626; 
	text-decoration: line-through;
	opacity: 0.7;
}

/* Form Controls */
input.form-control, textarea.form-control, select.form-select {
	border: 1px solid var(--edu-border);
	border-radius: 0.5rem;
	transition: all 0.2s ease;
}

input.form-control:focus, textarea.form-control:focus, select.form-select:focus {
	border-color: var(--edu-primary-light);
	box-shadow: 0 0 0 0.25rem rgba(16, 185, 129, 0.15);
}

/* Tables */
.table {
	border-radius: 0.5rem;
	overflow: hidden;
}

.table thead {
	background: linear-gradient(135deg, var(--edu-primary-lighter) 0%, var(--edu-bg-secondary) 100%);
	color: var(--edu-primary-dark);
}

.table tbody tr:hover {
	background: var(--edu-bg-secondary);
}