/*--------------------------------------------------------------
 * ADAS Academy — Premium Frontend Styles
 * Dark-mode, minimalist, conversion-focused design system
 *--------------------------------------------------------------*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
	--adas-bg: #0a0a0f;
	--adas-surface: #111118;
	--adas-card: #16161e;
	--adas-card-hover: #1c1c26;
	--adas-border: rgba(255,255,255,0.06);
	--adas-border-hover: rgba(255,255,255,0.12);
	--adas-text: #ffffff;
	--adas-muted: rgba(255,255,255,0.55);
	--adas-subtle: rgba(255,255,255,0.3);
	--adas-green: #34d399;
	--adas-gold: #fbbf24;
	--adas-red: #f87171;
	--adas-blue: #60a5fa;
	--adas-purple: #a78bfa;
	--adas-radius: 16px;
	--adas-radius-sm: 10px;
	--adas-font: 'Inter', -apple-system, sans-serif;
}

/* ---- Reset ---- */
.adas-archive-wrapper *, .adas-single-course *, .adas-single-lesson * {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

.adas-archive-wrapper, .adas-single-course, .adas-single-lesson {
	font-family: var(--adas-font);
	background: var(--adas-bg);
	color: var(--adas-text);
	-webkit-font-smoothing: antialiased;
	line-height: 1.6;
}

/* ================================================================
   ARCHIVE PAGE
   ================================================================ */

.adas-archive-hero {
	position: relative;
	padding: 80px 24px 60px;
	text-align: center;
	overflow: hidden;
}
.adas-archive-hero-inner {
	max-width: 680px;
	margin: 0 auto;
	position: relative;
	z-index: 2;
}
.adas-archive-hero-glow {
	position: absolute;
	top: -120px;
	left: 50%;
	transform: translateX(-50%);
	width: 600px;
	height: 400px;
	background: radial-gradient(ellipse, rgba(255,255,255,0.03), transparent 70%);
	pointer-events: none;
}
.adas-archive-label {
	display: inline-block;
	font-size: 11px;
	letter-spacing: 0.2em;
	text-transform: uppercase;
	color: var(--adas-muted);
	margin-bottom: 16px;
	padding: 6px 16px;
	border: 1px solid var(--adas-border);
	border-radius: 100px;
}
.adas-archive-title {
	font-size: clamp(2rem, 5vw, 3.5rem);
	font-weight: 800;
	letter-spacing: -0.03em;
	margin-bottom: 16px;
	background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,0.6) 100%);
	-webkit-background-clip: text;
	-webkit-text-fill-color: transparent;
	background-clip: text;
}
.adas-archive-subtitle {
	font-size: 16px;
	color: var(--adas-muted);
	max-width: 500px;
	margin: 0 auto;
	line-height: 1.7;
}

/* Course Grid */
.adas-archive-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
	gap: 24px;
	max-width: 1200px;
	margin: 0 auto;
	padding: 0 24px 80px;
}

/* Course Card */
.adas-course-card {
	background: var(--adas-card);
	border: 1px solid var(--adas-border);
	border-radius: var(--adas-radius);
	overflow: hidden;
	transition: all 0.4s cubic-bezier(0.4,0,0.2,1);
}
.adas-course-card:hover {
	border-color: var(--adas-border-hover);
	transform: translateY(-4px);
	box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}
.adas-course-card--featured {
	border-color: rgba(251,191,36,0.15);
}
.adas-course-card--featured:hover {
	border-color: rgba(251,191,36,0.3);
}
.adas-course-card__image {
	position: relative;
	aspect-ratio: 16/9;
	overflow: hidden;
}
.adas-course-card__image img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: transform 0.6s ease;
}
.adas-course-card:hover .adas-course-card__image img {
	transform: scale(1.05);
}
.adas-course-card__image-overlay {
	position: absolute;
	inset: 0;
	background: linear-gradient(to top, var(--adas-card), transparent 60%);
}
.adas-course-card__badge {
	position: absolute;
	top: 16px;
	font-size: 11px;
	font-weight: 700;
	padding: 5px 12px;
	border-radius: 100px;
	letter-spacing: 0.02em;
	z-index: 2;
}
.adas-course-card__badge--free {
	right: 16px;
	background: rgba(52,211,153,0.15);
	color: var(--adas-green);
	border: 1px solid rgba(52,211,153,0.2);
}
.adas-course-card__badge--paid {
	right: 16px;
	background: rgba(255,255,255,0.1);
	color: #fff;
	border: 1px solid rgba(255,255,255,0.15);
}
.adas-course-card__badge--featured {
	left: 16px;
	background: rgba(251,191,36,0.15);
	color: var(--adas-gold);
	border: 1px solid rgba(251,191,36,0.2);
}
.adas-course-card__content {
	padding: 24px;
}
.adas-course-card__meta {
	display: flex;
	gap: 12px;
	margin-bottom: 12px;
	flex-wrap: wrap;
}
.adas-course-card__meta span {
	font-size: 11px;
	color: var(--adas-subtle);
	text-transform: uppercase;
	letter-spacing: 0.08em;
}
.adas-course-card__title {
	font-size: 18px;
	font-weight: 700;
	margin-bottom: 8px;
	line-height: 1.3;
}
.adas-course-card__title a {
	color: inherit;
	text-decoration: none;
}
.adas-course-card__title a:hover {
	color: var(--adas-blue);
}
.adas-course-card__desc {
	font-size: 14px;
	color: var(--adas-muted);
	line-height: 1.6;
	margin-bottom: 20px;
}
.adas-course-card__footer {
	display: flex;
	justify-content: flex-start;
}

/* ================================================================
   BUTTONS
   ================================================================ */

.adas-btn {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	font-family: var(--adas-font);
	font-size: 13px;
	font-weight: 600;
	padding: 12px 24px;
	border-radius: var(--adas-radius-sm);
	border: none;
	cursor: pointer;
	transition: all 0.3s ease;
	text-decoration: none;
	line-height: 1;
}
.adas-btn--primary {
	background: #fff;
	color: #000;
}
.adas-btn--primary:hover {
	box-shadow: 0 8px 30px rgba(255,255,255,0.12);
	transform: translateY(-1px);
}
.adas-btn--continue {
	background: rgba(52,211,153,0.1);
	color: var(--adas-green);
	border: 1px solid rgba(52,211,153,0.2);
}
.adas-btn--continue:hover {
	background: rgba(52,211,153,0.15);
}
.adas-btn--lg {
	padding: 16px 32px;
	font-size: 15px;
	border-radius: 14px;
}
.adas-btn--done {
	background: rgba(52,211,153,0.1);
	color: var(--adas-green);
	border: 1px solid rgba(52,211,153,0.2);
	pointer-events: none;
}
.adas-btn__progress {
	font-size: 11px;
	opacity: 0.7;
}

/* ================================================================
   SINGLE COURSE
   ================================================================ */

.adas-course-hero {
	padding: 60px 24px;
	background: linear-gradient(180deg, var(--adas-surface) 0%, var(--adas-bg) 100%);
}
.adas-course-hero__inner {
	max-width: 1200px;
	margin: 0 auto;
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 60px;
	align-items: center;
}
.adas-course-hero__badges {
	display: flex;
	gap: 8px;
	margin-bottom: 16px;
}
.adas-badge {
	display: inline-flex;
	align-items: center;
	font-size: 11px;
	font-weight: 600;
	padding: 5px 12px;
	border-radius: 100px;
	letter-spacing: 0.02em;
}
.adas-badge--free { background: rgba(52,211,153,0.12); color: var(--adas-green); }
.adas-badge--paid { background: rgba(255,255,255,0.08); color: #fff; }
.adas-badge--difficulty { background: rgba(167,139,250,0.12); color: var(--adas-purple); }
.adas-badge--preview { background: rgba(96,165,250,0.12); color: var(--adas-blue); }

.adas-course-hero__title {
	font-size: clamp(1.8rem, 4vw, 2.8rem);
	font-weight: 800;
	letter-spacing: -0.03em;
	line-height: 1.15;
	margin-bottom: 16px;
}
.adas-course-hero__desc {
	font-size: 16px;
	color: var(--adas-muted);
	line-height: 1.7;
	margin-bottom: 24px;
}
.adas-course-hero__stats {
	display: flex;
	gap: 32px;
	margin-bottom: 32px;
}
.adas-stat {
	display: flex;
	flex-direction: column;
}
.adas-stat__value {
	font-size: 20px;
	font-weight: 700;
}
.adas-stat__label {
	font-size: 12px;
	color: var(--adas-subtle);
	text-transform: uppercase;
	letter-spacing: 0.08em;
}
.adas-course-hero__image {
	position: relative;
	border-radius: var(--adas-radius);
	overflow: hidden;
}
.adas-course-hero__image img {
	width: 100%;
	height: auto;
	display: block;
	border-radius: var(--adas-radius);
}
.adas-course-hero__image-glow {
	position: absolute;
	inset: -20%;
	background: radial-gradient(ellipse at center, rgba(255,255,255,0.04), transparent 70%);
	pointer-events: none;
}

/* Course Body */
.adas-course-body {
	max-width: 1200px;
	margin: 0 auto;
	padding: 60px 24px 80px;
	display: grid;
	grid-template-columns: 1fr 340px;
	gap: 48px;
}
.adas-course-section {
	margin-bottom: 48px;
}
.adas-course-section__title {
	font-size: 22px;
	font-weight: 700;
	margin-bottom: 24px;
	display: flex;
	align-items: center;
	gap: 12px;
}
.adas-course-section__count {
	font-size: 12px;
	font-weight: 500;
	color: var(--adas-subtle);
}
.adas-course-content {
	color: var(--adas-muted);
	font-size: 15px;
	line-height: 1.8;
}
.adas-course-content h2, .adas-course-content h3 { color: var(--adas-text); margin: 24px 0 12px; }
.adas-course-content p { margin-bottom: 16px; }
.adas-course-content ul, .adas-course-content ol { padding-left: 24px; margin-bottom: 16px; }

/* Curriculum */
.adas-curriculum__item {
	display: flex;
	align-items: center;
	gap: 16px;
	padding: 16px 20px;
	background: var(--adas-card);
	border: 1px solid var(--adas-border);
	border-radius: var(--adas-radius-sm);
	margin-bottom: 8px;
	transition: all 0.3s ease;
}
.adas-curriculum__item:hover {
	border-color: var(--adas-border-hover);
	background: var(--adas-card-hover);
}
.adas-curriculum__item--locked { opacity: 0.5; }
.adas-curriculum__item--completed { border-color: rgba(52,211,153,0.15); }
.adas-curriculum__number {
	width: 32px;
	height: 32px;
	background: rgba(255,255,255,0.04);
	border-radius: 8px;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 13px;
	font-weight: 600;
	color: var(--adas-subtle);
	flex-shrink: 0;
}
.adas-curriculum__info { flex: 1; }
.adas-curriculum__title {
	font-size: 14px;
	font-weight: 600;
	margin-bottom: 2px;
}
.adas-curriculum__title a { color: inherit; text-decoration: none; }
.adas-curriculum__title a:hover { color: var(--adas-blue); }
.adas-curriculum__duration {
	font-size: 12px;
	color: var(--adas-subtle);
}
.adas-curriculum__icon { font-size: 16px; }
.adas-curriculum__icon--done { color: var(--adas-green); }
.adas-curriculum__tag {
	font-size: 10px;
	text-transform: uppercase;
	letter-spacing: 0.1em;
	color: var(--adas-blue);
	background: rgba(96,165,250,0.08);
	padding: 3px 8px;
	border-radius: 4px;
}

/* Instructor */
.adas-instructor {
	display: flex;
	gap: 20px;
	align-items: flex-start;
}
.adas-instructor__avatar {
	width: 80px;
	height: 80px;
	border-radius: 50%;
	object-fit: cover;
	border: 2px solid var(--adas-border);
}
.adas-instructor__name { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.adas-instructor__bio { font-size: 14px; color: var(--adas-muted); line-height: 1.6; }

/* Sidebar */
.adas-course-sidebar-card {
	background: var(--adas-card);
	border: 1px solid var(--adas-border);
	border-radius: var(--adas-radius);
	padding: 32px;
	position: sticky;
	top: 100px;
}
.adas-sidebar-price {
	text-align: center;
	margin-bottom: 24px;
}
.adas-sidebar-price__amount {
	display: block;
	font-size: 36px;
	font-weight: 800;
	margin-bottom: 4px;
}
.adas-sidebar-price__label {
	font-size: 12px;
	color: var(--adas-subtle);
}
.adas-sidebar-progress {
	text-align: center;
	margin-bottom: 24px;
}
.adas-sidebar-progress__ring {
	position: relative;
	width: 80px;
	height: 80px;
	margin: 0 auto 12px;
}
.adas-sidebar-progress__ring svg { width: 100%; height: 100%; }
.adas-sidebar-progress__text {
	position: absolute;
	inset: 0;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 16px;
	font-weight: 700;
}
.adas-sidebar-progress__label { font-size: 13px; color: var(--adas-muted); }
.adas-sidebar-features {
	list-style: none;
	padding: 0;
}
.adas-sidebar-features li {
	padding: 10px 0;
	border-bottom: 1px solid var(--adas-border);
	font-size: 13px;
	color: var(--adas-muted);
}
.adas-sidebar-features li:last-child { border-bottom: none; }

/* ================================================================
   SINGLE LESSON
   ================================================================ */

.adas-locked-screen {
	min-height: 80vh;
	display: flex;
	align-items: center;
	justify-content: center;
	text-align: center;
	padding: 40px;
}
.adas-locked-screen__inner { max-width: 400px; }
.adas-locked-screen__icon { font-size: 48px; margin-bottom: 24px; }
.adas-locked-screen h1 { font-size: 24px; font-weight: 700; margin-bottom: 12px; }
.adas-locked-screen p { font-size: 14px; color: var(--adas-muted); margin-bottom: 24px; }

.adas-lesson-content {
	max-width: 900px;
	margin: 0 auto;
	padding: 40px 24px 80px;
}
.adas-lesson-header {
	margin-bottom: 32px;
}
.adas-lesson-header__back {
	display: inline-flex;
	align-items: center;
	font-size: 13px;
	color: var(--adas-muted);
	text-decoration: none;
	margin-bottom: 16px;
	transition: color 0.2s;
}
.adas-lesson-header__back:hover { color: var(--adas-text); }
.adas-lesson-header__title {
	font-size: clamp(1.5rem,3vw,2rem);
	font-weight: 800;
	letter-spacing: -0.02em;
}
.adas-lesson-player {
	margin-bottom: 32px;
	border-radius: var(--adas-radius);
	overflow: hidden;
	background: #000;
}
.adas-lesson-video {
	width: 100%;
	display: block;
}
.adas-lesson-body {
	color: var(--adas-muted);
	font-size: 15px;
	line-height: 1.8;
}
.adas-lesson-body h2,.adas-lesson-body h3 { color: var(--adas-text); margin: 24px 0 12px; }
.adas-lesson-body p { margin-bottom: 16px; }
.adas-lesson-actions {
	margin-top: 40px;
	padding-top: 24px;
	border-top: 1px solid var(--adas-border);
}

/* Empty State */
.adas-empty-state {
	grid-column: 1 / -1;
	text-align: center;
	padding: 80px 24px;
}
.adas-empty-state h2 { font-size: 24px; margin-bottom: 8px; }
.adas-empty-state p { color: var(--adas-muted); }

/* Pagination */
.adas-pagination { text-align: center; padding: 0 24px 60px; }
.adas-pagination a,.adas-pagination span {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 40px;
	height: 40px;
	margin: 0 4px;
	border-radius: 10px;
	font-size: 14px;
	font-weight: 500;
	color: var(--adas-muted);
	background: var(--adas-card);
	border: 1px solid var(--adas-border);
	text-decoration: none;
	transition: all 0.2s;
}
.adas-pagination a:hover { border-color: var(--adas-border-hover); color: var(--adas-text); }
.adas-pagination .current { background: #fff; color: #000; border-color: #fff; }

/* ================================================================
   RESPONSIVE
   ================================================================ */

@media (max-width: 900px) {
	.adas-course-hero__inner { grid-template-columns: 1fr; gap: 32px; }
	.adas-course-body { grid-template-columns: 1fr; }
	.adas-course-sidebar-card { position: static; }
}
@media (max-width: 600px) {
	.adas-archive-grid { grid-template-columns: 1fr; }
	.adas-course-hero { padding: 40px 16px; }
	.adas-course-hero__stats { gap: 20px; flex-wrap: wrap; }
}