:root {
	--bg: #f8fafc;
	--card-bg: #ffffff;
	--fg: #0f172a;
	--muted: #475569;
	--muted-light: #64748b;
	--border: #e2e8f0;
	--border-light: #f1f5f9;
	--accent: #1e40af;
	--accent-hover: #1d4ed8;
	--accent-light: #eff6ff;
	--accent-glow: rgba(30, 64, 175, 0.15);
	--success: #059669;
	--success-light: #ecfdf5;
	--warning: #d97706;
	--warning-light: #fffbeb;
	--danger: #dc2626;
	--danger-light: #fef2f2;
	--purple: #7c3aed;
	--purple-light: #f5f3ff;
	--teal: #0d9488;
	--teal-light: #f0fdfa;
	--radius-sm: 8px;
	--radius: 14px;
	--radius-lg: 20px;
	--space: 1rem;
	--shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
	--shadow: 0 4px 12px rgba(15, 23, 42, 0.06);
	--shadow-lg: 0 12px 28px rgba(15, 23, 42, 0.1);
	--font-main: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
	--font-dyslexic: "Comic Sans MS", "Chalkboard SE", "OpenDyslexic", sans-serif;
	--font-current: var(--font-main);
	--base-font-size: 16px;
}

[data-theme="dark"] {
	--bg: #0b1120;
	--card-bg: #131d33;
	--fg: #f8fafc;
	--muted: #94a3b8;
	--muted-light: #64748b;
	--border: #1e293b;
	--border-light: #2d3748;
	--accent: #3b82f6;
	--accent-hover: #60a5fa;
	--accent-light: #172554;
	--accent-glow: rgba(59, 130, 246, 0.25);
	--success: #10b981;
	--success-light: #064e3b;
	--warning: #f59e0b;
	--warning-light: #451a03;
	--danger: #ef4444;
	--danger-light: #450a0a;
	--purple: #8b5cf6;
	--purple-light: #2e1065;
	--teal: #14b8a6;
	--teal-light: #042f2e;
	--shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
	--shadow-lg: 0 12px 28px rgba(0, 0, 0, 0.6);
}

[data-theme="sepia"] {
	--bg: #fbf7ee;
	--card-bg: #f4ecdc;
	--fg: #433422;
	--muted: #736048;
	--muted-light: #8c775d;
	--border: #dfd3bd;
	--border-light: #eae0ce;
	--accent: #8b5a2b;
	--accent-hover: #72461e;
	--accent-light: #ede2cf;
	--accent-glow: rgba(139, 90, 43, 0.15);
	--success: #2d7a4c;
	--success-light: #e0eee4;
	--warning: #b46d16;
	--warning-light: #faebd7;
	--danger: #aa2b2b;
	--danger-light: #fae4e4;
	--purple: #6d4b96;
	--purple-light: #ebdfef;
	--teal: #1e7069;
	--teal-light: #d8edea;
}

[data-theme="high-contrast"] {
	--bg: #000000;
	--card-bg: #121212;
	--fg: #ffffff;
	--muted: #e5e5e5;
	--muted-light: #cccccc;
	--border: #ffffff;
	--border-light: #888888;
	--accent: #ffff00;
	--accent-hover: #ffff66;
	--accent-light: #333300;
	--accent-glow: rgba(255, 255, 0, 0.4);
	--success: #00ff66;
	--success-light: #003311;
	--warning: #ffaa00;
	--warning-light: #332200;
	--danger: #ff3333;
	--danger-light: #330000;
	--purple: #d580ff;
	--purple-light: #33004d;
	--teal: #00ffff;
	--teal-light: #003333;
}

* {
	box-sizing: border-box;
}

html {
	font-size: var(--base-font-size);
	scroll-behavior: smooth;
}

body {
	margin: 0;
	background: var(--bg);
	color: var(--fg);
	font-family: var(--font-current);
	line-height: 1.6;
	-webkit-font-smoothing: antialiased;
	transition: background-color 0.25s ease, color 0.25s ease;
}

/* Accessibility bar */
.dua-topbar {
	background: var(--card-bg);
	border-bottom: 1px solid var(--border);
	padding: 0.5rem 1rem;
	position: sticky;
	top: 0;
	z-index: 100;
	backdrop-filter: blur(8px);
}

.dua-bar-content {
	max-width: 1200px;
	margin: 0 auto;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 0.75rem;
	flex-wrap: wrap;
}

.dua-badge {
	display: inline-flex;
	align-items: center;
	gap: 0.4rem;
	padding: 0.2rem 0.6rem;
	background: var(--accent-light);
	color: var(--accent);
	border: 1px solid var(--accent);
	border-radius: 999px;
	font-size: 0.8rem;
	font-weight: 700;
}

.dua-controls {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	flex-wrap: wrap;
}

.control-btn {
	background: var(--card-bg);
	color: var(--fg);
	border: 1px solid var(--border);
	border-radius: var(--radius-sm);
	padding: 0.35rem 0.65rem;
	font-size: 0.85rem;
	cursor: pointer;
	display: inline-flex;
	align-items: center;
	gap: 0.35rem;
	transition: all 0.15s ease;
	font-family: inherit;
}

.control-btn:hover {
	border-color: var(--accent);
	background: var(--accent-light);
	color: var(--accent);
}

.control-btn.active {
	background: var(--accent);
	color: #ffffff;
	border-color: var(--accent);
}

[data-theme="high-contrast"] .control-btn.active {
	color: #000000;
}

/* App Header & Hero */
.app-header {
	background: linear-gradient(135deg, var(--card-bg) 0%, var(--bg) 100%);
	border-bottom: 1px solid var(--border);
	padding: 2.5rem 1.5rem 2rem;
	position: relative;
	overflow: hidden;
}

.header-container {
	max-width: 1200px;
	margin: 0 auto;
	display: grid;
	grid-template-columns: 1fr;
	gap: 1.5rem;
}

@media (min-width: 768px) {
	.header-container {
		grid-template-columns: 1.5fr 1fr;
		align-items: center;
	}
}

.hero-title {
	font-size: clamp(1.8rem, 4vw, 2.75rem);
	font-weight: 800;
	line-height: 1.15;
	margin: 0 0 0.75rem;
	letter-spacing: -0.03em;
	color: var(--fg);
}

.hero-subtitle {
	font-size: 1.1rem;
	color: var(--muted);
	margin: 0 0 1.25rem;
	line-height: 1.5;
}

.dua-principles-pillbox {
	display: flex;
	gap: 0.5rem;
	flex-wrap: wrap;
	margin-top: 1rem;
}

.dua-pill {
	display: inline-flex;
	align-items: center;
	gap: 0.35rem;
	font-size: 0.78rem;
	font-weight: 600;
	padding: 0.25rem 0.6rem;
	border-radius: var(--radius-sm);
	background: var(--border-light);
	color: var(--muted);
	border: 1px solid var(--border);
}

.hero-card {
	background: var(--card-bg);
	border: 1px solid var(--border);
	border-radius: var(--radius-lg);
	padding: 1.25rem;
	box-shadow: var(--shadow);
}

.progress-header {
	display: flex;
	justify-content: space-between;
	align-items: center;
	margin-bottom: 0.75rem;
}

.progress-bar-track {
	height: 10px;
	background: var(--border-light);
	border-radius: 999px;
	overflow: hidden;
	margin-bottom: 0.75rem;
	border: 1px solid var(--border);
}

.progress-bar-fill {
	height: 100%;
	background: linear-gradient(90deg, var(--accent), var(--teal));
	transition: width 0.4s ease;
}

/* Nav Tabs */
.main-nav {
	max-width: 1200px;
	margin: 1.5rem auto 0;
	padding: 0 1rem;
	display: flex;
	gap: 0.5rem;
	overflow-x: auto;
	scrollbar-width: thin;
	padding-bottom: 0.5rem;
}

.nav-tab {
	padding: 0.7rem 1.1rem;
	border-radius: var(--radius);
	border: 1px solid var(--border);
	background: var(--card-bg);
	color: var(--muted);
	font-weight: 600;
	font-size: 0.92rem;
	cursor: pointer;
	white-space: nowrap;
	display: inline-flex;
	align-items: center;
	gap: 0.5rem;
	transition: all 0.2s ease;
	font-family: inherit;
}

.nav-tab:hover {
	color: var(--fg);
	border-color: var(--accent);
	transform: translateY(-1px);
}

.nav-tab.active {
	background: var(--accent);
	color: #ffffff;
	border-color: var(--accent);
	box-shadow: var(--shadow-sm);
}

[data-theme="high-contrast"] .nav-tab.active {
	color: #000000;
}

/* Main Layout */
.app-body {
	max-width: 1200px;
	margin: 1.5rem auto 4rem;
	padding: 0 1rem;
}

/* Cards and Grid */
.grid-2 {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(min(320px, 100%), 1fr));
	gap: 1.25rem;
}

.grid-3 {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
	gap: 1.25rem;
}

.grid-4 {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr));
	gap: 1rem;
}

.dua-card {
	background: var(--card-bg);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	padding: 1.35rem;
	box-shadow: var(--shadow-sm);
	transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
	display: flex;
	flex-direction: column;
}

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

.dua-card-header {
	display: flex;
	align-items: flex-start;
	justify-content: space-between;
	gap: 0.75rem;
	margin-bottom: 0.85rem;
}

.dua-card-title {
	font-size: 1.2rem;
	font-weight: 700;
	margin: 0;
	color: var(--fg);
}

/* Multi-modal switcher (DUA representation) */
.mode-toggle-group {
	display: inline-flex;
	background: var(--border-light);
	border: 1px solid var(--border);
	border-radius: var(--radius-sm);
	padding: 2px;
	gap: 2px;
}

.mode-toggle-btn {
	padding: 0.25rem 0.55rem;
	border-radius: 6px;
	border: none;
	background: transparent;
	font-size: 0.78rem;
	font-weight: 600;
	color: var(--muted);
	cursor: pointer;
	transition: all 0.15s ease;
	font-family: inherit;
}

.mode-toggle-btn.active {
	background: var(--card-bg);
	color: var(--fg);
	box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

/* Audio Player Bar */
.audio-narration-btn {
	background: var(--teal-light);
	color: var(--teal);
	border: 1px solid var(--teal);
	border-radius: 999px;
	padding: 0.35rem 0.75rem;
	font-size: 0.82rem;
	font-weight: 600;
	display: inline-flex;
	align-items: center;
	gap: 0.4rem;
	cursor: pointer;
	transition: all 0.15s ease;
	font-family: inherit;
}

.audio-narration-btn:hover {
	filter: brightness(0.95);
	transform: scale(1.02);
}

.audio-narration-btn.speaking {
	background: var(--danger-light);
	color: var(--danger);
	border-color: var(--danger);
	animation: pulse 1.5s infinite;
}

@keyframes pulse {
	0%, 100% { opacity: 1; }
	50% { opacity: 0.7; }
}

/* Interactive Administrative Process Diagram */
.process-diagram-container {
	background: var(--card-bg);
	border: 1px solid var(--border);
	border-radius: var(--radius-lg);
	padding: 1.5rem;
	margin: 1.5rem 0;
	box-shadow: var(--shadow);
}

.process-phases {
	display: grid;
	grid-template-columns: 1fr;
	gap: 1rem;
	margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
	.process-phases {
		grid-template-columns: 1fr 1fr;
	}
}

.phase-block {
	border-radius: var(--radius);
	padding: 1rem;
	border: 2px dashed var(--border);
	background: var(--bg);
}

.phase-badge {
	display: inline-block;
	font-size: 0.75rem;
	font-weight: 800;
	text-transform: uppercase;
	letter-spacing: 0.05em;
	padding: 0.2rem 0.6rem;
	border-radius: 999px;
	margin-bottom: 0.6rem;
}

.phase-mec {
	border-color: var(--accent);
	background: var(--accent-light);
}

.phase-mec .phase-badge {
	background: var(--accent);
	color: #ffffff;
}

.phase-din {
	border-color: var(--teal);
	background: var(--teal-light);
}

.phase-din .phase-badge {
	background: var(--teal);
	color: #ffffff;
}

.process-steps-grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: 0.75rem;
}

@media (min-width: 480px) {
	.process-steps-grid {
		grid-template-columns: 1fr 1fr;
	}
}

.process-step-btn {
	background: var(--card-bg);
	border: 2px solid var(--border);
	border-radius: var(--radius);
	padding: 1rem;
	text-align: left;
	cursor: pointer;
	transition: all 0.2s ease;
	position: relative;
	font-family: inherit;
}

.process-step-btn:hover {
	border-color: var(--accent);
	transform: translateY(-2px);
	box-shadow: var(--shadow-sm);
}

.process-step-btn.selected {
	border-color: var(--accent);
	background: var(--card-bg);
	box-shadow: 0 0 0 3px var(--accent-glow);
}

.step-number {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 26px;
	height: 26px;
	border-radius: 50%;
	background: var(--accent);
	color: #ffffff;
	font-weight: 700;
	font-size: 0.8rem;
	margin-bottom: 0.4rem;
}

/* Detail Display Box */
.detail-card {
	background: var(--card-bg);
	border: 1px solid var(--border);
	border-left: 5px solid var(--accent);
	border-radius: var(--radius);
	padding: 1.25rem;
	margin-top: 1rem;
	box-shadow: var(--shadow-sm);
}

/* Systems diagram */
.system-diagram {
	background: var(--bg);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	padding: 1.25rem;
	margin: 1.25rem 0;
	display: flex;
	flex-direction: column;
	gap: 1rem;
}

.system-flow {
	display: flex;
	align-items: center;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: 0.75rem;
}

.system-node {
	flex: 1;
	min-width: 140px;
	background: var(--card-bg);
	border: 2px solid var(--border);
	border-radius: var(--radius);
	padding: 0.9rem;
	text-align: center;
	cursor: pointer;
	transition: all 0.2s ease;
}

.system-node:hover, .system-node.active {
	border-color: var(--teal);
	background: var(--teal-light);
	transform: translateY(-2px);
}

.system-arrow {
	font-size: 1.3rem;
	color: var(--muted);
	font-weight: bold;
}

/* Interactive Quiz & Exercises */
.interactive-box {
	background: var(--card-bg);
	border: 1px solid var(--border);
	border-radius: var(--radius-lg);
	padding: 1.5rem;
	margin: 1.5rem 0;
	box-shadow: var(--shadow);
}

.option-button {
	width: 100%;
	text-align: left;
	padding: 0.85rem 1rem;
	border: 1px solid var(--border);
	border-radius: var(--radius);
	background: var(--bg);
	color: var(--fg);
	font-size: 0.95rem;
	cursor: pointer;
	transition: all 0.2s ease;
	display: flex;
	align-items: center;
	gap: 0.75rem;
	margin-bottom: 0.6rem;
	font-family: inherit;
}

.option-button:hover {
	border-color: var(--accent);
	background: var(--accent-light);
}

.option-button.correct {
	background: var(--success-light);
	border-color: var(--success);
	color: var(--fg);
	font-weight: 600;
}

.option-button.incorrect {
	background: var(--danger-light);
	border-color: var(--danger);
	color: var(--fg);
}

/* Flashcards */
.flashcard {
	background: var(--card-bg);
	border: 2px solid var(--border);
	border-radius: var(--radius-lg);
	padding: 2rem 1.5rem;
	min-height: 220px;
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	text-align: center;
	cursor: pointer;
	transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
	box-shadow: var(--shadow);
}

.flashcard:hover {
	border-color: var(--accent);
	transform: translateY(-3px);
	box-shadow: var(--shadow-lg);
}

/* Portfolio Specifics */
.portfolio-container {
	background: var(--card-bg);
	border: 1px solid var(--border);
	border-radius: var(--radius-lg);
	padding: 2rem;
	box-shadow: var(--shadow);
}

.reflection-item {
	background: var(--bg);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	padding: 1.25rem;
	margin-bottom: 1.25rem;
}

.reflection-textarea {
	width: 100%;
	min-height: 90px;
	padding: 0.75rem;
	border: 1px solid var(--border);
	border-radius: var(--radius-sm);
	background: var(--card-bg);
	color: var(--fg);
	font-family: inherit;
	font-size: 0.92rem;
	resize: vertical;
	margin-top: 0.5rem;
}

.reflection-textarea:focus {
	outline: none;
	border-color: var(--accent);
	box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Rubric Slider / Self-Assessment */
.rubric-grid {
	display: grid;
	gap: 1rem;
	margin: 1.25rem 0;
}

.rubric-row {
	display: grid;
	grid-template-columns: 1fr;
	gap: 0.5rem;
	background: var(--bg);
	padding: 1rem;
	border-radius: var(--radius);
	border: 1px solid var(--border);
}

@media (min-width: 640px) {
	.rubric-row {
		grid-template-columns: 2fr 1fr;
		align-items: center;
	}
}

/* Badges & Medals */
.badges-strip {
	display: flex;
	gap: 0.75rem;
	flex-wrap: wrap;
	margin-top: 1rem;
}

.badge-item {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	padding: 0.5rem 0.85rem;
	border-radius: var(--radius);
	background: var(--bg);
	border: 1px solid var(--border);
	font-size: 0.85rem;
	font-weight: 600;
}

.badge-item.unlocked {
	background: var(--accent-light);
	border-color: var(--accent);
	color: var(--accent);
}

/* Printable Portafolio */
@media print {
	.dua-topbar, .main-nav, .mode-toggle-group, .audio-narration-btn, .btn-no-print {
		display: none !important;
	}
	body {
		background: #ffffff !important;
		color: #000000 !important;
	}
	.dua-card, .portfolio-container, .reflection-item {
		box-shadow: none !important;
		border: 1px solid #ccc !important;
		break-inside: avoid;
	}
}