/**
 * Mantas Lectures -- Main Styles
 *
 * Futuristic dark theme with glassmorphism and particle effects.
 * Fonts: Fira Code (monospace/headings) + Source Sans 3 (body)
 *
 * @package Mantas_Lectures
 * @version 1.0.0
 */

/* ==========================================================================
   CSS Custom Properties
   ========================================================================== */

:root {
	/* Colors */
	--color-bg-primary: #0a0a0f;
	--color-bg-secondary: #12121a;
	--color-bg-elevated: rgba(255, 255, 255, 0.03);
	--color-surface: rgba(255, 255, 255, 0.05);
	--color-border: rgba(255, 255, 255, 0.08);
	--color-border-hover: rgba(255, 255, 255, 0.15);

	--color-text-primary: #e8e8f0;
	--color-text-secondary: #8888a0;
	--color-text-muted: #555568;

	--color-accent: #6c5ce7;
	--color-accent-light: #a29bfe;
	--color-accent-glow: rgba(108, 92, 231, 0.4);

	--color-live: #00e676;
	--color-live-glow: rgba(0, 230, 118, 0.3);
	--color-upcoming: #6c5ce7;
	--color-completed: #555568;

	/* Typography */
	--font-mono: 'Fira Code', 'Courier New', monospace;
	--font-body: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

	--text-xs: 0.75rem;
	--text-sm: 0.875rem;
	--text-base: 1rem;
	--text-lg: 1.125rem;
	--text-xl: 1.25rem;
	--text-2xl: 1.5rem;
	--text-3xl: 2rem;
	--text-4xl: 2.5rem;
	--text-5xl: 3.5rem;

	/* Spacing */
	--space-xs: 0.25rem;
	--space-sm: 0.5rem;
	--space-md: 1rem;
	--space-lg: 1.5rem;
	--space-xl: 2rem;
	--space-2xl: 3rem;
	--space-3xl: 4rem;
	--space-4xl: 6rem;

	/* Layout */
	--container-max: 1200px;
	--container-padding: 1.5rem;

	/* Glass effect */
	--glass-bg: rgba(255, 255, 255, 0.04);
	--glass-border: rgba(255, 255, 255, 0.08);
	--glass-blur: 20px;
	--glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);

	/* Transitions */
	--transition-fast: 150ms ease;
	--transition-base: 250ms ease;
	--transition-slow: 400ms ease;

	/* Border radius */
	--radius-sm: 6px;
	--radius-md: 12px;
	--radius-lg: 16px;
	--radius-xl: 24px;
}

/* ==========================================================================
   Reset & Base
   ========================================================================== */

*,
*::before,
*::after {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

html {
	font-size: 16px;
	scroll-behavior: smooth;
	-webkit-text-size-adjust: 100%;
}

body {
	font-family: var(--font-body);
	font-size: var(--text-base);
	font-weight: 400;
	line-height: 1.6;
	color: var(--color-text-primary);
	background-color: var(--color-bg-primary);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	overflow-x: hidden;
}

/* Scrollbar */
::-webkit-scrollbar {
	width: 6px;
}

::-webkit-scrollbar-track {
	background: var(--color-bg-primary);
}

::-webkit-scrollbar-thumb {
	background: var(--color-accent-glow);
	border-radius: 99px;
}

::-webkit-scrollbar-thumb:hover {
	background: var(--color-accent);
}

* {
	scrollbar-width: thin;
	scrollbar-color: var(--color-accent-glow) var(--color-bg-primary);
}

/* Selection */
::selection {
	background: var(--color-accent-glow);
	color: #fff;
}

img {
	max-width: 100%;
	height: auto;
	display: block;
}

a {
	color: var(--color-accent-light);
	text-decoration: none;
	transition: color var(--transition-fast);
}

a:hover,
a:focus {
	color: var(--color-text-primary);
}

/* ==========================================================================
   Utility: Container
   ========================================================================== */

.section-container {
	max-width: var(--container-max);
	margin-left: auto;
	margin-right: auto;
	padding-left: var(--container-padding);
	padding-right: var(--container-padding);
}

/* ==========================================================================
   Glass Card Component
   ========================================================================== */

.glass-card {
	position: relative;
	background: var(--glass-bg);
	border: 1px solid var(--glass-border);
	border-radius: var(--radius-lg);
	backdrop-filter: blur(var(--glass-blur));
	-webkit-backdrop-filter: blur(var(--glass-blur));
	box-shadow: var(--glass-shadow);
	transition:
		border-color var(--transition-base),
		box-shadow var(--transition-base),
		transform var(--transition-base);
	overflow: hidden;
}

/* Inner corner highlight */
.glass-card::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	width: 80px;
	height: 80px;
	background: radial-gradient(circle at 0 0, rgba(108, 92, 231, 0.08) 0%, transparent 70%);
	opacity: 0;
	transition: opacity var(--transition-base);
	pointer-events: none;
}

.glass-card:hover {
	border-color: var(--color-border-hover);
	box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5), 0 0 60px var(--color-accent-glow);
	transform: translateY(-4px);
}

.glass-card:hover::before {
	opacity: 1;
}

/* ==========================================================================
   Particles Container
   ========================================================================== */

.particles-container {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	z-index: 0;
	pointer-events: none;
}

.particles-container canvas {
	display: block;
	width: 100%;
	height: 100%;
}

/* ==========================================================================
   Noise / Atmosphere Overlay (applied to body)
   ========================================================================== */

body::before {
	content: '';
	position: fixed;
	inset: 0;
	z-index: 9999;
	pointer-events: none;
	opacity: 0.03;
	background-image:
		url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
	background-repeat: repeat;
	background-size: 256px 256px;
}

body::after {
	content: '';
	position: fixed;
	inset: 0;
	z-index: -1;
	pointer-events: none;
	background:
		radial-gradient(ellipse 60% 50% at 20% 10%, rgba(108, 92, 231, 0.06) 0%, transparent 70%),
		radial-gradient(ellipse 50% 60% at 80% 80%, rgba(162, 155, 254, 0.04) 0%, transparent 70%);
}

/* ==========================================================================
   Site Header
   ========================================================================== */

.site-header {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	z-index: 100;
	background: rgba(10, 10, 15, 0.85);
	backdrop-filter: blur(12px);
	-webkit-backdrop-filter: blur(12px);
	border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
	max-width: var(--container-max);
	margin: 0 auto;
	padding: var(--space-md) var(--container-padding);
	display: flex;
	align-items: center;
	justify-content: space-between;
}

.site-header__logo-text {
	font-family: var(--font-mono);
	font-size: var(--text-lg);
	font-weight: 700;
	color: var(--color-text-primary);
	letter-spacing: 0.05em;
	text-decoration: none;
}

.site-header__logo-text:hover {
	color: var(--color-accent-light);
}

.site-header__nav {
	display: flex;
	gap: var(--space-lg);
}

.site-header__nav-link {
	font-family: var(--font-mono);
	font-size: var(--text-sm);
	color: var(--color-text-secondary);
	text-transform: uppercase;
	letter-spacing: 0.1em;
	transition: color var(--transition-fast);
	text-decoration: none;
}

.site-header__nav-link:hover {
	color: var(--color-accent-light);
}

/* ==========================================================================
   Site Main
   ========================================================================== */

.site-main {
	position: relative;
	z-index: 1;
	padding-top: 60px; /* Header offset */
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
	position: relative;
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 60vh;
	text-align: center;
	padding: var(--space-4xl) var(--container-padding);
	overflow: hidden;
	background:
		radial-gradient(ellipse 70% 55% at 50% 40%, rgba(108, 92, 231, 0.06) 0%, transparent 70%),
		radial-gradient(ellipse 60% 50% at 50% 60%, rgba(162, 155, 254, 0.03) 0%, transparent 70%);
}

/* Scanline overlay */
.hero::before {
	content: '';
	position: absolute;
	inset: 0;
	z-index: 1;
	pointer-events: none;
	background: repeating-linear-gradient(
		0deg,
		transparent,
		transparent 2px,
		rgba(0, 0, 0, 0.03) 2px,
		rgba(0, 0, 0, 0.03) 4px
	);
	opacity: 0.4;
}

/* Fade-out at bottom */
.hero::after {
	content: '';
	position: absolute;
	bottom: 0;
	left: 0;
	right: 0;
	height: 160px;
	background: linear-gradient(to bottom, transparent, var(--color-bg-primary));
	pointer-events: none;
	z-index: 2;
}

.hero__inner {
	position: relative;
	z-index: 3;
}

.hero__title {
	font-family: var(--font-mono);
	font-size: var(--text-5xl);
	font-weight: 700;
	line-height: 1.1;
	color: var(--color-text-primary);
	letter-spacing: 0.02em;
	margin-bottom: var(--space-md);
}

.hero__subtitle {
	font-family: var(--font-mono);
	font-size: var(--text-lg);
	color: var(--color-text-secondary);
	text-transform: uppercase;
	letter-spacing: 0.3em;
	margin-bottom: var(--space-xl);
	opacity: 0;
	animation: fade-in-up 1s 0.6s ease forwards;
}

.hero__line {
	width: 60px;
	height: 2px;
	background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
	margin: 0 auto;
}

/* Glitch Effect */
.glitch {
	position: relative;
}

.glitch::before,
.glitch::after {
	content: attr(data-text);
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	opacity: 0;
	pointer-events: none;
}

.glitch::before {
	color: #ff006e;
	animation: glitch-before 4s infinite linear;
}

.glitch::after {
	color: #a29bfe;
	animation: glitch-after 3.5s infinite linear;
}

@keyframes glitch-before {
	0%, 90%, 100% { opacity: 0; transform: translate(0); }
	91% { opacity: 0.8; transform: translate(-3px, 1px); clip-path: inset(20% 0 60% 0); }
	93% { opacity: 0.8; transform: translate(3px, -1px); clip-path: inset(50% 0 20% 0); }
	95% { opacity: 0; transform: translate(0); }
}

@keyframes glitch-after {
	0%, 90%, 100% { opacity: 0; transform: translate(0); }
	92% { opacity: 0.8; transform: translate(2px, -1px); clip-path: inset(40% 0 30% 0); }
	94% { opacity: 0.8; transform: translate(-2px, 1px); clip-path: inset(10% 0 70% 0); }
	96% { opacity: 0; transform: translate(0); }
}

/* ==========================================================================
   Section Heading
   ========================================================================== */

.section-heading {
	font-family: var(--font-mono);
	font-size: var(--text-2xl);
	font-weight: 600;
	color: var(--color-text-primary);
	margin-bottom: var(--space-2xl);
	letter-spacing: 0.02em;
	padding-bottom: var(--space-md);
	border-bottom: 1px solid var(--color-border);
}

.section-heading__accent {
	color: var(--color-accent);
	margin-right: var(--space-sm);
	opacity: 0.7;
}

/* ==========================================================================
   Section Spacing & Scroll Reveal
   ========================================================================== */

.next-lecture,
.upcoming-lectures,
.archive-lectures {
	padding: var(--space-3xl) 0;
}

/* Scroll reveal animation */
.reveal {
	opacity: 0;
	transform: translateY(40px);
	transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.is-visible {
	opacity: 1;
	transform: translateY(0);
}

/* ==========================================================================
   Featured Card (Next Lecture)
   ========================================================================== */

.featured-card {
	overflow: hidden;
	max-width: 800px;
	margin: 0 auto;
	border-color: rgba(108, 92, 231, 0.15);
	background:
		linear-gradient(135deg, rgba(108, 92, 231, 0.04), rgba(162, 155, 254, 0.02)),
		var(--glass-bg);
	box-shadow:
		0 0 60px rgba(108, 92, 231, 0.04),
		0 0 120px rgba(108, 92, 231, 0.02);
}

/* Accent line at top */
.featured-card::after {
	content: '';
	position: absolute;
	top: 0;
	left: 10%;
	right: 10%;
	height: 1px;
	background: linear-gradient(90deg, transparent, var(--color-accent-light), var(--color-accent), transparent);
	opacity: 0.6;
}

.featured-card:hover {
	border-color: var(--color-accent-glow);
	box-shadow:
		0 0 60px rgba(108, 92, 231, 0.1),
		0 0 120px rgba(108, 92, 231, 0.05),
		0 12px 40px rgba(0, 0, 0, 0.3);
}

.featured-card__image {
	position: relative;
	width: 100%;
	max-height: 300px;
	overflow: hidden;
}

.featured-card__img {
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.featured-card__image-overlay {
	position: absolute;
	bottom: 0;
	left: 0;
	width: 100%;
	height: 50%;
	background: linear-gradient(to top, var(--color-bg-primary), transparent);
}

.featured-card__content {
	padding: var(--space-2xl);
}

.featured-card__meta {
	display: flex;
	align-items: center;
	gap: var(--space-md);
	margin-bottom: var(--space-lg);
}

.featured-card__date {
	font-family: var(--font-mono);
	font-size: var(--text-sm);
	color: var(--color-text-secondary);
}

.featured-card__title {
	font-family: var(--font-mono);
	font-size: var(--text-3xl);
	font-weight: 700;
	line-height: 1.2;
	margin-bottom: var(--space-md);
}

.featured-card__title a {
	color: var(--color-text-primary);
	text-decoration: none;
}

.featured-card__title a:hover {
	color: var(--color-accent-light);
}

.featured-card__description {
	font-size: var(--text-lg);
	color: var(--color-text-secondary);
	line-height: 1.7;
	margin-bottom: var(--space-xl);
	max-width: 700px;
}

.featured-card__actions {
	display: flex;
	gap: var(--space-md);
	margin-top: var(--space-xl);
}

/* ==========================================================================
   Countdown Timer
   ========================================================================== */

.countdown {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: var(--space-lg);
	padding: var(--space-xl) 0;
}

.countdown__segment {
	display: flex;
	flex-direction: column;
	align-items: center;
	min-width: 70px;
}

.countdown__number {
	font-family: var(--font-mono);
	font-size: var(--text-4xl);
	font-weight: 700;
	color: var(--color-accent-light);
	line-height: 1;
	letter-spacing: 0.05em;
	text-shadow:
		0 0 12px var(--color-accent-glow),
		0 0 30px rgba(108, 92, 231, 0.08);
}

.countdown__label {
	font-family: var(--font-mono);
	font-size: var(--text-xs);
	color: var(--color-text-muted);
	text-transform: uppercase;
	letter-spacing: 0.15em;
	margin-top: var(--space-xs);
}

.countdown__separator {
	font-family: var(--font-mono);
	font-size: var(--text-3xl);
	color: var(--color-text-muted);
	line-height: 1;
	padding-bottom: 1.2rem;
	animation: blink 1s step-end infinite;
}

.countdown__live-indicator {
	font-family: var(--font-mono);
	font-size: var(--text-2xl);
	font-weight: 700;
	color: var(--color-live);
	text-transform: uppercase;
	letter-spacing: 0.15em;
	text-shadow: 0 0 20px var(--color-live-glow);
	animation: pulse-live-text 2s ease-in-out infinite;
}

@keyframes blink {
	50% { opacity: 0; }
}

@keyframes pulse-live-text {
	0%, 100% { opacity: 1; }
	50% { opacity: 0.6; }
}

.countdown--vertical {
	flex-direction: column;
	gap: var(--space-lg);
}

.countdown--vertical .countdown__segment {
	flex-direction: row;
	justify-content: center;
	gap: var(--space-md);
	min-width: auto;
}

.countdown--vertical .countdown__number {
	font-size: var(--text-3xl);
	min-width: 60px;
	text-align: right;
}

.countdown--vertical .countdown__label {
	min-width: 70px;
	text-align: left;
	margin-top: 0;
}

/* ==========================================================================
   Lecture Status Badges
   ========================================================================== */

.lecture-status {
	display: inline-flex;
	align-items: center;
	font-family: var(--font-mono);
	font-size: var(--text-xs);
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.12em;
	padding: var(--space-xs) var(--space-md);
	border-radius: 100px;
	line-height: 1.4;
}

.lecture-status--upcoming {
	background: rgba(108, 92, 231, 0.15);
	color: var(--color-accent-light);
	border: 1px solid rgba(108, 92, 231, 0.3);
}

.lecture-status--live {
	background: rgba(0, 230, 118, 0.1);
	color: var(--color-live);
	border: 1px solid rgba(0, 230, 118, 0.3);
	animation: pulse-live 2s ease-in-out infinite;
}

.lecture-status--live::before {
	content: '';
	display: inline-block;
	width: 6px;
	height: 6px;
	border-radius: 50%;
	background: var(--color-live);
	margin-right: var(--space-sm);
	box-shadow: 0 0 8px var(--color-live-glow);
}

.lecture-status--completed {
	background: rgba(85, 85, 104, 0.15);
	color: var(--color-completed);
	border: 1px solid rgba(85, 85, 104, 0.3);
}

@keyframes pulse-live {
	0%, 100% { box-shadow: 0 0 0 0 var(--color-live-glow); }
	50% { box-shadow: 0 0 16px 4px var(--color-live-glow); }
}

/* ==========================================================================
   Lecture Grid
   ========================================================================== */

.lecture-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
	gap: var(--space-xl);
}

/* Staggered entrance */
.lecture-grid .glass-card {
	opacity: 0;
	transform: translateY(30px);
	animation: card-entrance 0.6s ease forwards;
}

.lecture-grid .glass-card:nth-child(1) { animation-delay: 0.1s; }
.lecture-grid .glass-card:nth-child(2) { animation-delay: 0.2s; }
.lecture-grid .glass-card:nth-child(3) { animation-delay: 0.3s; }
.lecture-grid .glass-card:nth-child(4) { animation-delay: 0.4s; }
.lecture-grid .glass-card:nth-child(5) { animation-delay: 0.5s; }
.lecture-grid .glass-card:nth-child(6) { animation-delay: 0.6s; }

@keyframes card-entrance {
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

/* Archive grid fading */
.lecture-grid--archive .lecture-card {
	opacity: 0.55;
	filter: saturate(0.3);
	transition: opacity var(--transition-base), filter var(--transition-base);
}

.lecture-grid--archive .lecture-card:hover {
	opacity: 1;
	filter: saturate(1);
}

/* ==========================================================================
   Lecture Card
   ========================================================================== */

.lecture-card {
	overflow: hidden;
	display: flex;
	flex-direction: column;
}

.lecture-card__image {
	position: relative;
	height: 180px;
	overflow: hidden;
}

.lecture-card__img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: transform var(--transition-slow);
}

.lecture-card:hover .lecture-card__img {
	transform: scale(1.05);
}

.lecture-card__content {
	padding: var(--space-lg);
	flex: 1;
	display: flex;
	flex-direction: column;
}

.lecture-card__meta {
	display: flex;
	align-items: center;
	gap: var(--space-sm);
	margin-bottom: var(--space-md);
	flex-wrap: wrap;
}

.lecture-card__date {
	font-family: var(--font-mono);
	font-size: var(--text-xs);
	color: var(--color-text-muted);
}

.lecture-card__title {
	font-family: var(--font-mono);
	font-size: var(--text-xl);
	font-weight: 600;
	line-height: 1.3;
	margin-bottom: var(--space-sm);
}

.lecture-card__title a {
	color: var(--color-text-primary);
	text-decoration: none;
}

.lecture-card__title a:hover {
	color: var(--color-accent-light);
}

.lecture-card__excerpt {
	font-size: var(--text-sm);
	color: var(--color-text-secondary);
	line-height: 1.6;
	margin-bottom: var(--space-lg);
	flex: 1;
}

.lecture-card__actions {
	display: flex;
	gap: var(--space-sm);
	margin-top: auto;
}

/* Archived card specifics */
.lecture-card--archived {
	border-color: rgba(255, 255, 255, 0.03);
}

.lecture-card--archived .lecture-card__title a {
	color: var(--color-text-secondary);
}

.lecture-card--archived:hover {
	border-color: rgba(108, 92, 231, 0.2);
	box-shadow: 0 4px 20px rgba(108, 92, 231, 0.05);
}

.lecture-card--archived:hover .lecture-card__title a {
	color: var(--color-text-primary);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	font-family: var(--font-mono);
	font-size: var(--text-sm);
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.1em;
	padding: 0.75rem 1.5rem;
	border: 1px solid transparent;
	border-radius: var(--radius-sm);
	cursor: pointer;
	transition: all var(--transition-base);
	text-decoration: none;
	line-height: 1.4;
}

.btn--primary {
	background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
	background-size: 200% 200%;
	color: #ffffff;
	border-color: var(--color-accent);
	animation: gradient-drift 4s ease infinite;
}

.btn--primary:hover {
	color: #ffffff;
	box-shadow:
		0 0 20px var(--color-accent-glow),
		0 0 40px rgba(108, 92, 231, 0.15);
	transform: translateY(-2px);
}

.btn--outline {
	background: transparent;
	color: var(--color-text-secondary);
	border-color: var(--color-border);
}

.btn--outline:hover {
	color: var(--color-text-primary);
	border-color: var(--color-border-hover);
	background: var(--color-surface);
}

.btn--glow {
	position: relative;
	overflow: hidden;
	box-shadow:
		0 0 20px var(--color-accent-glow),
		0 0 50px rgba(108, 92, 231, 0.1);
}

/* Shimmer layer */
.btn--glow::before {
	content: '';
	position: absolute;
	inset: 0;
	border-radius: inherit;
	background: linear-gradient(
		105deg,
		transparent 30%,
		rgba(255, 255, 255, 0.12) 45%,
		transparent 60%
	);
	background-size: 250% 100%;
	animation: shimmer 3s ease-in-out infinite;
}

.btn--glow:hover {
	box-shadow:
		0 0 30px var(--color-accent-glow),
		0 0 60px rgba(108, 92, 231, 0.25),
		0 8px 24px rgba(0, 0, 0, 0.3);
}

.btn--small {
	font-size: var(--text-xs);
	padding: 0.5rem 1rem;
}

.btn--large {
	font-size: var(--text-base);
	padding: 1rem 2rem;
}

.btn--full {
	width: 100%;
}

@keyframes gradient-drift {
	0%, 100% { background-position: 0% 50%; }
	50% { background-position: 100% 50%; }
}

@keyframes shimmer {
	0% { background-position: 200% 0; }
	100% { background-position: -50% 0; }
}

/* ==========================================================================
   Empty State
   ========================================================================== */

.empty-state {
	padding: var(--space-3xl);
	text-align: center;
}

.empty-state__text {
	font-family: var(--font-mono);
	font-size: var(--text-sm);
	color: var(--color-text-muted);
	letter-spacing: 0.05em;
}

/* ==========================================================================
   Single Lecture
   ========================================================================== */

.single-lecture__header {
	padding: var(--space-4xl) 0 var(--space-2xl);
}

.single-lecture__back {
	display: inline-block;
	font-family: var(--font-mono);
	font-size: var(--text-sm);
	color: var(--color-text-muted);
	margin-bottom: var(--space-xl);
	transition: color var(--transition-fast);
	text-decoration: none;
}

.single-lecture__back:hover {
	color: var(--color-accent-light);
}

.single-lecture__meta {
	display: flex;
	align-items: center;
	gap: var(--space-md);
	margin-bottom: var(--space-lg);
}

.single-lecture__date {
	font-family: var(--font-mono);
	font-size: var(--text-sm);
	color: var(--color-text-secondary);
}

.single-lecture__title {
	font-family: var(--font-mono);
	font-size: var(--text-4xl);
	font-weight: 700;
	line-height: 1.15;
	margin-bottom: var(--space-md);
}

.single-lecture__excerpt {
	font-size: var(--text-lg);
	color: var(--color-text-secondary);
	max-width: 700px;
}

.single-lecture__body {
	padding-bottom: var(--space-4xl);
}

.single-lecture__layout {
	display: grid;
	grid-template-columns: 1fr 350px;
	gap: var(--space-2xl);
	align-items: start;
}

.single-lecture__content {
	padding: var(--space-2xl);
}

.single-lecture__image {
	margin: calc(-1 * var(--space-2xl));
	margin-bottom: var(--space-2xl);
	overflow: hidden;
	border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.single-lecture__img {
	width: 100%;
	max-height: 400px;
	object-fit: cover;
}

.single-lecture__section-title {
	font-family: var(--font-mono);
	font-size: var(--text-xl);
	font-weight: 600;
	color: var(--color-text-primary);
	margin-bottom: var(--space-lg);
}

.single-lecture__text {
	color: var(--color-text-secondary);
	line-height: 1.8;
}

.single-lecture__text p {
	margin-bottom: var(--space-md);
}

/* Sidebar */
.single-lecture__sidebar {
	display: flex;
	flex-direction: column;
	gap: var(--space-xl);
}

.single-lecture__countdown,
.single-lecture__join,
.single-lecture__info {
	padding: var(--space-xl);
}

.single-lecture__sidebar-title {
	font-family: var(--font-mono);
	font-size: var(--text-sm);
	font-weight: 600;
	color: var(--color-text-muted);
	text-transform: uppercase;
	letter-spacing: 0.15em;
	margin-bottom: var(--space-lg);
}

.single-lecture__join-note {
	font-size: var(--text-xs);
	color: var(--color-text-muted);
	text-align: center;
	margin-top: var(--space-md);
}

.single-lecture__completed-text,
.single-lecture__no-link p {
	font-family: var(--font-mono);
	font-size: var(--text-sm);
	color: var(--color-text-muted);
	text-align: center;
}

.single-lecture__details-list {
	display: grid;
	grid-template-columns: auto 1fr;
	gap: var(--space-sm) var(--space-lg);
	list-style: none;
}

.single-lecture__details-list dt {
	font-family: var(--font-mono);
	font-size: var(--text-xs);
	color: var(--color-text-muted);
	text-transform: uppercase;
	letter-spacing: 0.1em;
}

.single-lecture__details-list dd {
	font-size: var(--text-sm);
	color: var(--color-text-secondary);
}

/* ==========================================================================
   Site Footer
   ========================================================================== */

.site-footer {
	position: relative;
	z-index: 1;
	border-top: 1px solid var(--color-border);
	padding: var(--space-2xl) 0;
}

.site-footer__inner {
	max-width: var(--container-max);
	margin: 0 auto;
	padding: 0 var(--container-padding);
	text-align: center;
}

.site-footer__copy {
	font-family: var(--font-mono);
	font-size: var(--text-xs);
	color: var(--color-text-muted);
	letter-spacing: 0.05em;
}

/* ==========================================================================
   Utility Animations
   ========================================================================== */

@keyframes fade-in-up {
	from {
		opacity: 0;
		transform: translateY(20px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

@keyframes fade-in {
	from { opacity: 0; }
	to { opacity: 1; }
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1024px) {
	.single-lecture__layout {
		grid-template-columns: 1fr;
	}

	.single-lecture__sidebar {
		order: -1;
	}
}

@media (max-width: 768px) {
	:root {
		--text-5xl: 2.5rem;
		--text-4xl: 2rem;
		--text-3xl: 1.5rem;
	}

	.hero {
		min-height: 50vh;
		padding: var(--space-3xl) var(--container-padding);
	}

	.countdown {
		flex-wrap: wrap;
		justify-content: center;
	}

	.countdown__number {
		font-size: var(--text-3xl);
	}

	.countdown__separator {
		display: none;
	}

	.lecture-grid {
		grid-template-columns: 1fr;
	}

	.featured-card__content {
		padding: var(--space-lg);
	}

	.featured-card__actions {
		flex-direction: column;
	}

	.featured-card__actions .btn {
		width: 100%;
	}
}

@media (max-width: 480px) {
	:root {
		--text-5xl: 2rem;
		--text-4xl: 1.5rem;
		--container-padding: 1rem;
	}

	.site-header__nav {
		gap: var(--space-md);
	}

	.glass-card {
		border-radius: var(--radius-md);
	}

	.featured-card__content {
		padding: var(--space-md);
	}
}

@media (max-width: 380px) {
	.countdown {
		gap: 0.5rem 1rem;
	}

	.hero__title {
		font-size: 1.8rem;
	}
}

/* ==========================================================================
   Reduced Motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
	*,
	*::before,
	*::after {
		animation-duration: 0.01ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.01ms !important;
	}

	html {
		scroll-behavior: auto;
	}

	.reveal {
		opacity: 1;
		transform: none;
	}

	.lecture-grid .glass-card {
		opacity: 1;
		transform: none;
	}

	.hero__subtitle {
		opacity: 1;
	}
}