/* ============================================================
   CodesBlock — Course Portal UI
   Matches existing theme tokens: --bg, --ink, --green, --blue, etc.
   Sections:
   1. Archive / Course Listing Enhancements
   2. Single Course Enhancements
   3. AI Tutor Fixed Panel
   4. Paywall Modal & Content Gate
   5. Newsletter / Sign-up Strip
   6. Social Login Buttons
   7. Responsive Overrides
   ============================================================ */

/* ── 1. ARCHIVE — COURSE LISTING ──────────────────────────── */

.course-archive-hero {
	background:
		radial-gradient(circle at 80% 20%, rgba(19,185,129,.15), transparent 35%),
		radial-gradient(circle at 20% 80%, rgba(37,99,235,.12), transparent 35%),
		linear-gradient(160deg, #f7fbff 0%, #eef8ff 100%);
	border-bottom: 1px solid var(--line);
	padding: 72px 0 56px;
	text-align: center;
}

.course-archive-hero .eyebrow { margin-bottom: 10px; }

.course-archive-hero h1 {
	font-size: clamp(2.4rem, 5vw, 4rem);
	line-height: 1.0;
	margin-bottom: 14px;
}

.course-archive-hero p {
	color: var(--muted);
	font-size: 1.12rem;
	margin: 0 auto 32px;
	max-width: 560px;
}

/* Filter pills */
.course-filter-pills {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	justify-content: center;
	margin-top: 28px;
}

.filter-pill {
	background: rgba(255,255,255,.7);
	border: 1px solid var(--line-strong);
	border-radius: 999px;
	color: var(--ink);
	cursor: pointer;
	font-size: .84rem;
	font-weight: 700;
	padding: 8px 18px;
	transition: background .18s, border-color .18s, color .18s, transform .18s;
	backdrop-filter: blur(8px);
}

.filter-pill:hover {
	background: var(--green);
	border-color: var(--green);
	color: #fff;
	transform: translateY(-1px);
}

.filter-pill.is-active {
	background: var(--ink);
	border-color: var(--ink);
	color: #fff;
}

/* Course grid section */
.course-archive-section {
	padding: 64px 0 80px;
}

.course-archive-grid {
	display: grid;
	gap: 28px;
	grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
	margin-top: 40px;
}

/* Archive course card overrides / enhancements */
.course-card-v2 {
	background: var(--paper);
	border: 1px solid var(--line);
	border-radius: 14px;
	display: flex;
	flex-direction: column;
	overflow: hidden;
	position: relative;
	transition: box-shadow .22s ease, transform .22s ease, border-color .22s ease;
}

.course-card-v2:hover {
	border-color: var(--line-strong);
	box-shadow: 0 18px 48px rgba(16,24,40,.12);
	transform: translateY(-4px);
}

.course-card-v2 .course-thumb {
	aspect-ratio: 16/9;
	background: linear-gradient(135deg, #101828, #173a8a);
	overflow: hidden;
	position: relative;
}

.course-card-v2 .course-thumb img {
	height: 100%;
	object-fit: cover;
	width: 100%;
	transition: transform .4s ease;
}

.course-card-v2:hover .course-thumb img {
	transform: scale(1.04);
}

.course-thumb-placeholder {
	align-items: center;
	color: rgba(255,255,255,.35);
	display: flex;
	font-family: var(--font-heading);
	font-size: 1.1rem;
	font-weight: 700;
	height: 100%;
	justify-content: center;
	letter-spacing: .02em;
	padding: 24px;
	text-align: center;
}

.course-card-v2 .course-badge {
	background: var(--amber);
	border-radius: 6px;
	color: #101828;
	font-size: .72rem;
	font-weight: 900;
	left: 12px;
	letter-spacing: .04em;
	padding: 3px 8px;
	position: absolute;
	text-transform: uppercase;
	top: 12px;
	z-index: 2;
}

.course-badge-free { background: var(--green); color: #fff; }
.course-badge-hot  { background: var(--pink);  color: #fff; }
.course-badge-new  { background: var(--cyan);  color: #fff; }

.course-card-v2 .card-body {
	display: flex;
	flex: 1;
	flex-direction: column;
	gap: 8px;
	padding: 20px 22px 22px;
}

.card-meta-row {
	align-items: center;
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
}

.card-meta-row .meta-chip {
	align-items: center;
	color: var(--muted);
	display: inline-flex;
	font-size: .78rem;
	font-weight: 600;
	gap: 4px;
}

.course-card-v2 h2 {
	font-size: 1.15rem;
	line-height: 1.25;
	margin-bottom: 6px;
}

.course-card-v2 h2 a { color: var(--ink); }
.course-card-v2 h2 a:hover { color: var(--green-dark); }

.course-card-v2 .card-excerpt {
	color: var(--muted);
	font-size: .9rem;
	line-height: 1.55;
	margin-bottom: auto;
}

.card-footer {
	align-items: center;
	border-top: 1px solid var(--line);
	display: flex;
	gap: 12px;
	justify-content: space-between;
	margin-top: 16px;
	padding-top: 16px;
}

.price-tag {
	font-family: var(--font-heading);
	font-size: 1.25rem;
	font-weight: 800;
}

.price-tag .original {
	color: var(--muted);
	font-size: .82rem;
	font-weight: 600;
	margin-left: 5px;
	text-decoration: line-through;
}

.price-free { color: var(--green); }

.btn-view-course {
	background: var(--ink);
	border-radius: 8px;
	color: #fff;
	font-size: .84rem;
	font-weight: 800;
	padding: 9px 16px;
	transition: background .18s, transform .18s;
	white-space: nowrap;
}

.btn-view-course:hover {
	background: var(--green-dark);
	transform: translateY(-1px);
}

/* Empty state */
.no-courses-msg {
	color: var(--muted);
	font-size: 1.1rem;
	grid-column: 1 / -1;
	padding: 48px;
	text-align: center;
}

/* ── 2. SINGLE COURSE PAGE ───────────────────────────────── */

.single-course-wrap {
	padding-bottom: 80px;
}

.course-hero-banner {
	background:
		radial-gradient(circle at 90% 10%, rgba(19,185,129,.18), transparent 35%),
		linear-gradient(140deg, #101828 0%, #173a8a 60%, #0d3a2e 100%);
	color: #fff;
	padding: 60px 0 52px;
}

.course-hero-inner {
	display: grid;
	gap: 48px;
	grid-template-columns: 1fr 340px;
	align-items: start;
}

.course-hero-content .course-badge-hero {
	background: rgba(255,255,255,.15);
	border: 1px solid rgba(255,255,255,.3);
	border-radius: 999px;
	color: #fff;
	display: inline-block;
	font-size: .75rem;
	font-weight: 800;
	letter-spacing: .06em;
	margin-bottom: 16px;
	padding: 5px 14px;
	text-transform: uppercase;
}

.course-hero-content h1 {
	color: #fff;
	font-size: clamp(1.9rem, 3.5vw, 3rem);
	line-height: 1.08;
	margin-bottom: 14px;
}

.course-hero-content .course-subtitle {
	color: rgba(255,255,255,.75);
	font-size: 1.1rem;
	line-height: 1.6;
	margin-bottom: 20px;
	max-width: 600px;
}

.course-hero-meta {
	display: flex;
	flex-wrap: wrap;
	gap: 18px;
	margin-top: 6px;
}

.course-hero-meta span {
	align-items: center;
	color: rgba(255,255,255,.7);
	display: inline-flex;
	font-size: .9rem;
	font-weight: 600;
	gap: 6px;
}

.course-hero-meta strong { color: #fff; }

/* Sticky sidebar card */
.course-sticky-card {
	background: var(--paper);
	border: 1px solid var(--line);
	border-radius: 16px;
	box-shadow: 0 20px 60px rgba(16,24,40,.18);
	overflow: hidden;
	position: sticky;
	top: 90px;
}

.sticky-card-thumb {
	aspect-ratio: 16 / 11;
	background: linear-gradient(135deg, #101828, #173a8a);
	overflow: hidden;
}

.sticky-card-thumb img {
	height: 100%;
	object-fit: cover;
	width: 100%;
}

.sticky-card-body { padding: 22px; }

.sticky-price-row {
	align-items: baseline;
	display: flex;
	gap: 10px;
	margin-bottom: 16px;
}

.sticky-price {
	font-family: var(--font-heading);
	font-size: 2.2rem;
	font-weight: 800;
}

.sticky-price-original {
	color: var(--muted);
	font-size: 1.1rem;
	font-weight: 600;
	text-decoration: line-through;
}

.btn-enroll {
	background: linear-gradient(135deg, var(--green), var(--green-dark));
	border: none;
	border-radius: 10px;
	box-shadow: 0 8px 24px rgba(19,185,129,.3);
	color: #fff;
	cursor: pointer;
	display: block;
	font-size: 1.05rem;
	font-weight: 800;
	padding: 14px;
	text-align: center;
	text-decoration: none;
	transition: transform .18s, box-shadow .18s;
	width: 100%;
}

.btn-enroll:hover {
	box-shadow: 0 12px 32px rgba(19,185,129,.4);
	transform: translateY(-2px);
}

.enroll-guarantee {
	align-items: center;
	color: var(--muted);
	display: flex;
	font-size: .8rem;
	gap: 6px;
	justify-content: center;
	margin-top: 12px;
}

.course-includes-list {
	border-top: 1px solid var(--line);
	list-style: none;
	margin: 16px 0 0;
	padding: 16px 0 0;
}

.course-includes-list li {
	align-items: center;
	color: var(--ink);
	display: flex;
	font-size: .88rem;
	font-weight: 600;
	gap: 8px;
	padding: 5px 0;
}

.course-includes-list li svg { color: var(--green); flex-shrink: 0; }

/* Main content layout */
.course-content-layout {
	display: grid;
	gap: 40px;
	grid-template-columns: 1fr 340px;
	margin-top: 40px;
}

/* Course sections */
.course-section {
	background: var(--paper);
	border: 1px solid var(--line);
	border-radius: 14px;
	margin-bottom: 24px;
	padding: 28px 30px;
}

.course-section h2 {
	font-size: 1.35rem;
	margin-bottom: 18px;
}

/* What you'll learn grid */
.learn-grid {
	display: grid;
	gap: 10px 24px;
	grid-template-columns: 1fr 1fr;
	list-style: none;
	padding: 0;
}

.learn-grid li {
	align-items: flex-start;
	display: flex;
	font-size: .9rem;
	font-weight: 600;
	gap: 8px;
	line-height: 1.45;
}

.learn-grid li svg { color: var(--green); flex-shrink: 0; margin-top: 2px; }

/* Syllabus accordion */
.syllabus-module {
	border: 1px solid var(--line);
	border-radius: 10px;
	margin-bottom: 10px;
	overflow: hidden;
}

.syllabus-module-header {
	align-items: center;
	background: var(--bg);
	cursor: pointer;
	display: flex;
	font-weight: 700;
	gap: 10px;
	justify-content: space-between;
	padding: 14px 18px;
	transition: background .15s;
	user-select: none;
}

.syllabus-module-header:hover { background: #e8f5ee; }

.syllabus-module.is-open .syllabus-module-header { background: #e8f5ee; color: var(--green-dark); }

.syllabus-chevron {
	flex-shrink: 0;
	transition: transform .25s ease;
}

.syllabus-module.is-open .syllabus-chevron { transform: rotate(180deg); }

.syllabus-module-lessons {
	border-top: 1px solid var(--line);
	display: none;
	list-style: none;
	margin: 0;
	padding: 10px 18px 14px;
}

.syllabus-module.is-open .syllabus-module-lessons { display: block; }

.syllabus-module-lessons li {
	align-items: center;
	border-radius: 6px;
	color: var(--muted);
	display: flex;
	font-size: .88rem;
	gap: 8px;
	padding: 7px 4px;
}

/* Content gate / paywall overlay */
.content-gate-wrapper {
	position: relative;
	margin-bottom: 24px;
}

.content-gate-blur {
	filter: blur(5px);
	pointer-events: none;
	user-select: none;
	opacity: .5;
	max-height: 220px;
	overflow: hidden;
}

.content-gate-overlay {
	background: linear-gradient(to bottom, transparent 0%, rgba(247,251,255,.97) 40%, #f7fbff 100%);
	bottom: 0;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: flex-end;
	left: 0;
	padding: 28px;
	position: absolute;
	right: 0;
	text-align: center;
	top: 0;
}

.content-gate-overlay h3 {
	font-size: 1.2rem;
	margin-bottom: 8px;
}

.content-gate-overlay p {
	color: var(--muted);
	font-size: .9rem;
	margin-bottom: 18px;
	max-width: 360px;
}

/* ── 3. AI TUTOR — FIXED PANEL ───────────────────────────── */

/* Toggle button — fixed right edge */
.ai-tutor-toggle {
	align-items: center;
	background: linear-gradient(135deg, var(--blue), #1044c0);
	border: none;
	border-radius: 14px 0 0 14px;
	box-shadow: -4px 4px 20px rgba(37,99,235,.35);
	color: #fff;
	cursor: pointer;
	display: flex;
	flex-direction: column;
	font-size: .72rem;
	font-weight: 800;
	gap: 6px;
	justify-content: center;
	letter-spacing: .03em;
	padding: 14px 10px;
	position: fixed;
	right: 0;
	text-transform: uppercase;
	top: 50%;
	transform: translateY(-50%);
	transition: background .2s, box-shadow .2s, right .3s ease;
	width: 42px;
	writing-mode: horizontal-tb;
	z-index: 1000;
}

.ai-tutor-toggle:hover { background: linear-gradient(135deg, #1044c0, #0a2e8a); }

.ai-tutor-toggle-inner {
	align-items: center;
	display: flex;
	flex-direction: column;
	gap: 6px;
}

.ai-tutor-pulse {
	background: #4ade80;
	border-radius: 50%;
	box-shadow: 0 0 0 0 rgba(74,222,128,.5);
	height: 8px;
	width: 8px;
	animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
	0%   { box-shadow: 0 0 0 0 rgba(74,222,128,.6); }
	70%  { box-shadow: 0 0 0 8px rgba(74,222,128,0); }
	100% { box-shadow: 0 0 0 0 rgba(74,222,128,0); }
}

/* AI tutor side panel */
.ai-tutor-panel {
	background: var(--paper);
	border-left: 1px solid var(--line);
	box-shadow: -8px 0 40px rgba(16,24,40,.12);
	display: flex;
	flex-direction: column;
	height: 100vh;
	position: fixed;
	right: -420px;
	top: 0;
	transition: right .35s cubic-bezier(.4,0,.2,1);
	width: 400px;
	z-index: 999;
}

.ai-tutor-panel.is-open { right: 0; }

.ai-tutor-panel-header {
	align-items: center;
	background: linear-gradient(135deg, #101828, #173a8a);
	color: #fff;
	display: flex;
	gap: 12px;
	padding: 18px 20px;
	flex-shrink: 0;
}

.ai-tutor-avatar {
	align-items: center;
	background: linear-gradient(135deg, var(--green), var(--blue));
	border-radius: 50%;
	color: #fff;
	display: flex;
	flex-shrink: 0;
	font-size: 1.1rem;
	font-weight: 900;
	height: 40px;
	justify-content: center;
	width: 40px;
}

.ai-tutor-panel-header-info { flex: 1; }
.ai-tutor-panel-header-info strong { display: block; font-size: .95rem; }
.ai-tutor-panel-header-info small { color: rgba(255,255,255,.6); font-size: .76rem; }

.ai-tutor-close {
	background: rgba(255,255,255,.12);
	border: none;
	border-radius: 8px;
	color: #fff;
	cursor: pointer;
	font-size: 1.1rem;
	height: 32px;
	line-height: 1;
	padding: 0;
	transition: background .15s;
	width: 32px;
}

.ai-tutor-close:hover { background: rgba(255,255,255,.22); }

/* Summary tab */
.ai-tutor-tabs {
	border-bottom: 1px solid var(--line);
	display: flex;
	flex-shrink: 0;
}

.ai-tutor-tab {
	background: none;
	border: none;
	border-bottom: 2px solid transparent;
	color: var(--muted);
	cursor: pointer;
	flex: 1;
	font-size: .85rem;
	font-weight: 700;
	margin-bottom: -1px;
	padding: 12px 8px;
	transition: color .15s, border-color .15s;
}

.ai-tutor-tab.is-active {
	border-bottom-color: var(--blue);
	color: var(--blue);
}

/* Tab content panels */
.ai-tutor-tab-content { display: none; flex: 1; overflow-y: auto; }
.ai-tutor-tab-content.is-active { display: flex; flex-direction: column; }

/* Summary panel */
.ai-tutor-summary {
	flex: 1;
	overflow-y: auto;
	padding: 20px;
}

.ai-tutor-summary p {
	color: var(--muted);
	font-size: .9rem;
	line-height: 1.65;
}

.ai-tutor-summary-title {
	align-items: center;
	display: flex;
	font-size: .78rem;
	font-weight: 800;
	gap: 6px;
	color: var(--blue);
	letter-spacing: .04em;
	margin-bottom: 12px;
	text-transform: uppercase;
}

/* Chat panel */
.ai-chat-messages {
	flex: 1;
	overflow-y: auto;
	padding: 16px;
	display: flex;
	flex-direction: column;
	gap: 14px;
}

.chat-msg {
	display: flex;
	gap: 10px;
	max-width: 90%;
}

.chat-msg-ai { align-self: flex-start; }
.chat-msg-user { align-self: flex-end; flex-direction: row-reverse; }

.chat-bubble {
	border-radius: 12px;
	font-size: .88rem;
	line-height: 1.6;
	padding: 10px 14px;
}

.chat-msg-ai .chat-bubble {
	background: #f0f5ff;
	border: 1px solid #d4e0ff;
	border-bottom-left-radius: 4px;
	color: var(--ink);
}

.chat-msg-user .chat-bubble {
	background: var(--ink);
	border-bottom-right-radius: 4px;
	color: #fff;
}

.chat-avatar {
	align-items: center;
	background: linear-gradient(135deg, var(--green), var(--blue));
	border-radius: 50%;
	color: #fff;
	display: flex;
	flex-shrink: 0;
	font-size: .7rem;
	font-weight: 900;
	height: 28px;
	justify-content: center;
	width: 28px;
}

/* Typing indicator */
.chat-typing {
	align-items: center;
	display: flex;
	gap: 4px;
	padding: 4px 2px;
}

.chat-typing span {
	animation: typing-bounce .9s infinite;
	background: var(--muted);
	border-radius: 50%;
	display: block;
	height: 6px;
	width: 6px;
}

.chat-typing span:nth-child(2) { animation-delay: .15s; }
.chat-typing span:nth-child(3) { animation-delay: .3s; }

@keyframes typing-bounce {
	0%, 60%, 100% { transform: translateY(0); opacity: .5; }
	30%            { transform: translateY(-6px); opacity: 1; }
}

/* Suggested questions */
.ai-suggestions {
	border-top: 1px solid var(--line);
	padding: 10px 16px;
	flex-shrink: 0;
}

.ai-suggestions-label {
	color: var(--muted);
	font-size: .72rem;
	font-weight: 700;
	letter-spacing: .04em;
	margin-bottom: 8px;
	text-transform: uppercase;
}

.ai-suggestion-chips {
	display: flex;
	flex-wrap: wrap;
	gap: 6px;
}

.ai-suggestion-chip {
	background: var(--bg);
	border: 1px solid var(--line);
	border-radius: 999px;
	color: var(--ink);
	cursor: pointer;
	font-size: .78rem;
	font-weight: 600;
	padding: 5px 12px;
	transition: background .15s, border-color .15s;
}

.ai-suggestion-chip:hover {
	background: #e8f5ee;
	border-color: var(--green);
	color: var(--green-dark);
}

/* Chat input */
.ai-chat-input-area {
	border-top: 1px solid var(--line);
	display: flex;
	gap: 10px;
	padding: 14px 16px;
	flex-shrink: 0;
}

.ai-chat-input {
	background: var(--bg);
	border: 1px solid var(--line);
	border-radius: 10px;
	flex: 1;
	font-size: .9rem;
	outline: none;
	padding: 10px 14px;
	resize: none;
	transition: border-color .18s;
}

.ai-chat-input:focus-visible {
	border-color: var(--blue);
	box-shadow: 0 0 0 3px rgba(49, 95, 216, .18);
}

.ai-chat-send {
	align-items: center;
	background: var(--blue);
	border: none;
	border-radius: 10px;
	color: #fff;
	cursor: pointer;
	display: flex;
	flex-shrink: 0;
	height: 42px;
	justify-content: center;
	transition: background .18s, transform .18s;
	width: 42px;
}

.ai-chat-send:hover {
	background: #1044c0;
	transform: scale(1.05);
}

/* ── 4. PAYWALL MODAL ────────────────────────────────────── */

.paywall-overlay {
	align-items: center;
	background: rgba(16,24,40,.65);
	backdrop-filter: blur(6px);
	bottom: 0;
	display: flex;
	justify-content: center;
	left: 0;
	opacity: 0;
	padding: 24px;
	pointer-events: none;
	position: fixed;
	right: 0;
	top: 0;
	transition: opacity .25s ease;
	z-index: 2000;
}

.paywall-overlay.is-open {
	opacity: 1;
	pointer-events: auto;
}

.paywall-modal {
	background: var(--paper);
	border-radius: 20px;
	box-shadow: 0 32px 80px rgba(16,24,40,.25);
	max-height: 90vh;
	max-width: 860px;
	overflow-y: auto;
	transform: translateY(20px) scale(.97);
	transition: transform .28s cubic-bezier(.4,0,.2,1);
	width: 100%;
}

.paywall-overlay.is-open .paywall-modal {
	transform: translateY(0) scale(1);
}

.paywall-modal-header {
	background: linear-gradient(135deg, #101828, #173a8a);
	border-radius: 20px 20px 0 0;
	color: #fff;
	padding: 32px 36px 28px;
	position: relative;
	text-align: center;
}

.paywall-modal-header h2 {
	color: #fff;
	font-size: 1.7rem;
	margin-bottom: 6px;
}

.paywall-modal-header p {
	color: rgba(255,255,255,.7);
	font-size: 1rem;
	margin: 0;
}

.paywall-modal-close {
	background: rgba(255,255,255,.12);
	border: none;
	border-radius: 50%;
	color: #fff;
	cursor: pointer;
	font-size: 1.2rem;
	height: 36px;
	line-height: 1;
	position: absolute;
	right: 20px;
	top: 20px;
	transition: background .15s;
	width: 36px;
}

.paywall-modal-close:hover { background: rgba(255,255,255,.22); }

/* Plans grid */
.paywall-plans {
	display: grid;
	gap: 20px;
	grid-template-columns: repeat(3, 1fr);
	padding: 32px 36px;
}

.plan-card {
	background: var(--bg);
	border: 2px solid var(--line);
	border-radius: 14px;
	display: flex;
	flex-direction: column;
	padding: 24px 20px;
	position: relative;
	transition: border-color .2s, box-shadow .2s;
}

.plan-card:hover {
	border-color: var(--line-strong);
	box-shadow: 0 8px 32px rgba(16,24,40,.1);
}

.plan-card.is-popular {
	background: var(--paper);
	border-color: var(--blue);
	box-shadow: 0 8px 40px rgba(37,99,235,.18);
}

.plan-popular-badge {
	background: var(--blue);
	border-radius: 999px;
	color: #fff;
	font-size: .7rem;
	font-weight: 900;
	left: 50%;
	letter-spacing: .05em;
	padding: 4px 12px;
	position: absolute;
	text-transform: uppercase;
	top: -12px;
	transform: translateX(-50%);
	white-space: nowrap;
}

.plan-name {
	font-family: var(--font-heading);
	font-size: 1rem;
	font-weight: 700;
	margin-bottom: 4px;
}

.plan-price {
	font-family: var(--font-heading);
	font-size: 2rem;
	font-weight: 800;
	line-height: 1;
	margin-bottom: 2px;
}

.plan-period {
	color: var(--muted);
	font-size: .8rem;
	margin-bottom: 12px;
}

.plan-desc {
	color: var(--muted);
	font-size: .84rem;
	line-height: 1.5;
	margin-bottom: 16px;
}

.plan-features {
	flex: 1;
	list-style: none;
	margin-bottom: 20px;
	padding: 0;
}

.plan-features li {
	align-items: flex-start;
	display: flex;
	font-size: .84rem;
	font-weight: 600;
	gap: 7px;
	padding: 5px 0;
}

.plan-features li svg { color: var(--green); flex-shrink: 0; margin-top: 2px; }

.btn-plan {
	background: var(--ink);
	border: 2px solid var(--ink);
	border-radius: 10px;
	color: #fff;
	cursor: pointer;
	font-size: .9rem;
	font-weight: 800;
	padding: 11px;
	text-align: center;
	transition: background .18s, transform .18s;
	width: 100%;
}

.btn-plan:hover { background: #1f2d42; transform: translateY(-1px); }

.plan-card.is-popular .btn-plan {
	background: var(--blue);
	border-color: var(--blue);
	box-shadow: 0 6px 20px rgba(37,99,235,.25);
}

.plan-card.is-popular .btn-plan:hover { background: #1044c0; }

.paywall-modal-footer {
	border-top: 1px solid var(--line);
	color: var(--muted);
	font-size: .82rem;
	padding: 18px 36px;
	text-align: center;
}

/* Social login in paywall */
.social-login-divider {
	align-items: center;
	color: var(--muted);
	display: flex;
	font-size: .8rem;
	gap: 12px;
	margin: 0 36px 20px;
	text-transform: uppercase;
}

.social-login-divider::before,
.social-login-divider::after {
	background: var(--line);
	content: '';
	flex: 1;
	height: 1px;
}

.social-login-buttons {
	display: flex;
	gap: 12px;
	margin: 0 36px 24px;
}

.btn-social {
	align-items: center;
	background: var(--paper);
	border: 1px solid var(--line-strong);
	border-radius: 10px;
	color: var(--ink);
	cursor: pointer;
	display: flex;
	flex: 1;
	font-size: .88rem;
	font-weight: 700;
	gap: 10px;
	justify-content: center;
	padding: 11px 16px;
	transition: background .18s, border-color .18s, transform .18s;
}

.btn-social:hover {
	background: var(--bg);
	border-color: var(--ink);
	transform: translateY(-1px);
}

.btn-social svg { flex-shrink: 0; height: 20px; width: 20px; }

/* ── 5. NEWSLETTER STRIP ─────────────────────────────────── */

.newsletter-strip {
	background:
		radial-gradient(circle at 80% 50%, rgba(19,185,129,.15), transparent 40%),
		linear-gradient(135deg, #101828, #173a8a);
	border-radius: 16px;
	color: #fff;
	margin: 40px 0;
	padding: 48px 40px;
	text-align: center;
}

.newsletter-strip h2 {
	color: #fff;
	font-size: 1.7rem;
	margin-bottom: 10px;
}

.newsletter-strip p {
	color: rgba(255,255,255,.7);
	font-size: 1rem;
	margin: 0 auto 24px;
	max-width: 480px;
}

.newsletter-form {
	align-items: center;
	background: rgba(255,255,255,.1);
	border: 1px solid rgba(255,255,255,.2);
	border-radius: 12px;
	display: flex;
	gap: 0;
	margin: 0 auto;
	max-width: 480px;
	overflow: hidden;
	padding: 6px;
	backdrop-filter: blur(8px);
}

.newsletter-form input {
	background: transparent;
	border: none;
	color: #fff;
	flex: 1;
	font-size: .95rem;
	outline: none;
	padding: 8px 14px;
}

.newsletter-form input::placeholder { color: rgba(255,255,255,.5); }

.newsletter-form:focus-within {
	box-shadow: 0 0 0 3px rgba(255, 255, 255, .28);
}

.newsletter-form button {
	background: var(--green);
	border: none;
	border-radius: 8px;
	color: #fff;
	cursor: pointer;
	font-size: .9rem;
	font-weight: 800;
	padding: 10px 20px;
	transition: background .18s, transform .18s;
	white-space: nowrap;
}

.newsletter-form button:hover {
	background: var(--green-dark);
	transform: scale(1.02);
}

.newsletter-trust-row {
	align-items: center;
	color: rgba(255,255,255,.5);
	display: flex;
	font-size: .78rem;
	gap: 6px;
	justify-content: center;
	margin-top: 14px;
}

/* ── 6. SOCIAL LOGIN PAGE ────────────────────────────────── */

.social-login-page {
	min-height: 60vh;
	padding: 72px 0;
}

.social-login-box {
	background: var(--paper);
	border: 1px solid var(--line);
	border-radius: 20px;
	box-shadow: var(--shadow);
	margin: 0 auto;
	max-width: 420px;
	padding: 40px;
	text-align: center;
}

.social-login-box h1 {
	font-size: 1.6rem;
	margin-bottom: 8px;
}

.social-login-box p {
	color: var(--muted);
	font-size: .92rem;
	margin-bottom: 28px;
}

.social-login-box .btn-social {
	flex-direction: row;
	margin-bottom: 12px;
	width: 100%;
}

/* ── 7. RESPONSIVE ───────────────────────────────────────── */

@media (max-width: 900px) {
	.course-hero-inner,
	.course-content-layout {
		grid-template-columns: 1fr;
	}

	.course-sticky-card {
		position: static;
		margin-top: 32px;
	}

	.course-content-layout article {
		font-size: 1.05rem;
		line-height: 1.75;
		padding: 0 8px;
	}

	.paywall-plans {
		grid-template-columns: 1fr;
	}

	.ai-tutor-panel {
		width: 100vw;
		right: -100vw;
	}

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

@media (max-width: 640px) {
	.course-archive-hero h1 { font-size: 2rem; }

	.paywall-modal-header,
	.paywall-plans,
	.paywall-modal-footer,
	.social-login-divider,
	.social-login-buttons {
		padding-left: 20px;
		padding-right: 20px;
		margin-left: 0;
		margin-right: 0;
	}

	.social-login-buttons { flex-direction: column; }

	.newsletter-strip { padding: 36px 20px; }
}

/* Mobile/tablet refinement: course pages should read like a focused lesson, not a squeezed desktop. */
@media (max-width: 980px) {
	.course-hero-banner {
		padding: 42px 0 26px;
	}

	.course-hero-inner,
	.course-content-layout {
		gap: 20px;
		grid-template-columns: 1fr;
	}

	.course-hero-content h1 {
		font-size: clamp(2rem, 6vw, 3rem);
		line-height: 1.05;
	}

	.course-subtitle {
		font-size: .98rem;
		line-height: 1.62;
	}

	.course-hero-meta {
		gap: 8px;
	}

	.course-hero-meta span {
		font-size: .78rem;
		padding: 7px 9px;
	}

	.course-sticky-card {
		display: grid;
		grid-template-columns: 132px minmax(0, 1fr);
		margin-top: 4px;
		position: static;
	}

	.sticky-card-thumb {
		height: auto;
		min-height: 100%;
	}

	.sticky-card-body {
		padding: 16px;
	}

	.sticky-price {
		font-size: 1.5rem;
	}

	.btn-enroll {
		min-height: 44px;
		padding: 11px 14px;
	}

	.course-includes-list {
		display: none;
	}

	.course-details-sidebar {
		display: none;
	}

	.course-section {
		border-radius: 12px;
		margin-bottom: 16px;
		padding: 22px;
	}

	.course-section h2 {
		font-size: 1.35rem;
		line-height: 1.18;
	}

	.learn-grid {
		gap: 10px;
		grid-template-columns: 1fr;
	}

	.learn-grid li {
		font-size: .92rem;
		line-height: 1.45;
		padding: 12px;
	}

	.syllabus-module-header {
		font-size: .94rem;
		padding: 14px;
	}

	.syllabus-module-lessons li {
		font-size: .88rem;
		line-height: 1.45;
	}

	.paywall-overlay {
		align-items: flex-end;
		padding: 0;
	}

	.paywall-modal {
		border-radius: 20px 20px 0 0;
		max-height: 92dvh;
		max-width: none;
		width: 100%;
	}

	.paywall-modal-header {
		border-radius: 20px 20px 0 0;
		padding: 24px 24px 18px;
		text-align: left;
	}

	.paywall-modal-header h2 {
		font-size: 1.42rem;
		line-height: 1.15;
		padding-right: 42px;
	}

	.paywall-modal-header p {
		font-size: .88rem;
		line-height: 1.5;
	}

	.paywall-modal-close {
		right: 16px;
		top: 16px;
	}

	.social-login-divider {
		font-size: .68rem;
		margin: 14px 20px;
	}

	.social-login-buttons {
		margin: 0 20px;
	}

	.paywall-plans {
		gap: 12px;
		grid-template-columns: 1fr;
		padding: 18px 20px;
	}

	.plan-card {
		border-width: 1px;
		border-radius: 12px;
		padding: 16px;
	}

	.plan-card.is-popular {
		order: -1;
	}

	.plan-popular-badge {
		align-self: flex-start;
		display: inline-flex;
		left: auto;
		margin-bottom: 8px;
		position: static;
		top: auto;
		transform: none;
	}

	.plan-name {
		font-size: .92rem;
	}

	.plan-price {
		font-size: 1.62rem;
	}

	.plan-desc,
	.plan-features li {
		font-size: .8rem;
		line-height: 1.42;
	}

	.plan-features {
		display: grid;
		gap: 2px;
		margin-bottom: 14px;
	}

	.btn-plan {
		min-height: 42px;
		padding: 10px;
	}

	.paywall-modal-footer {
		font-size: .76rem;
		line-height: 1.45;
		padding: 14px 20px 18px;
	}
}

@media (max-width: 640px) {
	.course-hero-banner {
		padding-top: 30px;
	}

	.course-archive-hero {
		padding: 38px 0 30px;
		text-align: left;
	}

	.course-archive-hero h1 {
		font-size: 2rem;
		line-height: 1.05;
	}

	.course-archive-hero p {
		font-size: .92rem;
		line-height: 1.55;
		margin-bottom: 18px;
	}

	.course-filter-pills {
		justify-content: flex-start;
		margin-top: 18px;
		overflow-x: auto;
		padding-bottom: 4px;
		scrollbar-width: none;
	}

	.course-filter-pills::-webkit-scrollbar {
		display: none;
	}

	.filter-pill {
		flex: 0 0 auto;
		font-size: .76rem;
		padding: 7px 12px;
	}

	.course-archive-section {
		padding: 32px 0 48px;
	}

	.course-archive-grid {
		gap: 14px;
		grid-template-columns: 1fr;
		margin-top: 0;
	}

	.course-card-v2 {
		border-radius: 12px;
	}

	.course-card-v2 .course-thumb {
		aspect-ratio: 16 / 8.5;
	}

	.course-card-v2 .card-body {
		padding: 16px;
	}

	.course-card-v2 h2 {
		font-size: 1.04rem;
	}

	.course-card-v2 .card-excerpt {
		font-size: .82rem;
		line-height: 1.45;
	}

	.card-footer {
		align-items: stretch;
		gap: 10px;
		margin-top: 12px;
		padding-top: 12px;
	}

	.btn-view-course {
		font-size: .78rem;
		padding: 9px 12px;
		text-align: center;
	}

	.course-sticky-card {
		grid-template-columns: 96px minmax(0, 1fr);
	}

	.sticky-card-body {
		padding: 13px;
	}

	.enroll-guarantee {
		font-size: .72rem;
	}

	.course-section {
		padding: 18px;
	}

	.ai-tutor-toggle {
		bottom: 16px;
		right: 12px;
	}

	.ai-tutor-toggle-inner {
		height: 46px;
		width: 46px;
	}

	.ai-tutor-toggle-inner span {
		writing-mode: horizontal-tb !important;
	}

	.paywall-modal {
		max-height: 94dvh;
	}

	.plan-features li:nth-child(n+5) {
		display: none;
	}
}

/* Final course-page polish: protect small screens from horizontal overflow and cramped controls. */
.single-course-wrap,
.single-course-wrap * {
	box-sizing: border-box;
}

.course-hero-content,
.course-details-area,
.course-details-sidebar,
.course-section,
.paywall-modal,
.ai-tutor-panel {
	min-width: 0;
}

.course-hero-content h1,
.course-section h2,
.plan-card,
.chat-bubble,
.ai-suggestion-chip {
	overflow-wrap: anywhere;
}

@media (max-width: 760px) {
	.course-hero-inner {
		align-items: stretch;
	}

	.course-hero-meta span {
		background: rgba(255,255,255,.1);
		border: 1px solid rgba(255,255,255,.14);
		border-radius: 999px;
		max-width: 100%;
	}

	.course-sticky-card {
		box-shadow: 0 14px 38px rgba(16,24,40,.14);
	}

	.sticky-price-row {
		align-items: center;
		flex-wrap: wrap;
		gap: 6px;
		margin-bottom: 10px;
	}

	.sticky-price-original {
		font-size: .92rem;
	}

	.content-gate-wrapper {
		min-height: 220px;
	}

	.content-gate-overlay {
		justify-content: center;
		padding: 20px;
	}

	.content-gate-overlay h3 {
		font-size: 1.06rem;
		line-height: 1.2;
	}

	.content-gate-overlay p {
		font-size: .84rem;
		line-height: 1.48;
	}

	.ai-tutor-toggle {
		border-radius: 999px;
		bottom: 18px;
		box-shadow: 0 10px 28px rgba(37,99,235,.34);
		height: 52px;
		padding: 0;
		right: 16px;
		top: auto;
		transform: none;
		width: 52px;
	}

	.ai-tutor-toggle-inner {
		height: 100%;
		justify-content: center;
		width: 100%;
	}

	.ai-tutor-toggle-inner span {
		writing-mode: horizontal-tb !important;
	}

	.ai-tutor-panel {
		border-left: 0;
		max-width: 100vw;
		padding-bottom: env(safe-area-inset-bottom);
	}

	.ai-tutor-panel-header {
		padding-top: calc(16px + env(safe-area-inset-top));
	}

	.ai-chat-messages {
		padding: 14px 12px;
	}

	.chat-msg {
		max-width: 96%;
	}

	.chat-bubble {
		font-size: .84rem;
	}

	.ai-suggestion-chip {
		font-size: .74rem;
		max-width: 100%;
	}

	.ai-chat-input-area {
		gap: 8px;
		padding: 12px;
	}
}

@media (max-width: 460px) {
	.course-hero-content h1 {
		font-size: 1.8rem;
	}

	.course-sticky-card {
		display: block;
	}

	.sticky-card-thumb {
		aspect-ratio: 16 / 7;
		min-height: 0;
	}

	.sticky-card-body {
		padding: 14px;
	}

	.enroll-guarantee {
		justify-content: flex-start;
		text-align: left;
	}

	.course-section {
		border-left: 0;
		border-radius: 0;
		border-right: 0;
		margin-left: -14px;
		margin-right: -14px;
		padding: 18px 14px;
	}

	.paywall-modal-header {
		padding-left: 20px;
		padding-right: 20px;
	}

	.paywall-plans {
		padding-left: 16px;
		padding-right: 16px;
	}
}

/* Course library proof and pricing */
.course-archive-proof {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	justify-content: center;
	margin: -10px auto 24px;
}

.course-archive-proof span {
	background: rgba(255, 255, 255, .76);
	border: 1px solid rgba(190, 208, 225, .82);
	border-radius: 999px;
	color: #526174;
	font-size: .78rem;
	padding: 7px 12px;
}

.course-archive-proof strong { color: var(--ink); }

.course-pricing-section {
	background: #f7fbff;
	border-block: 1px solid var(--line);
	padding: 72px 0;
}

.course-pricing-heading {
	align-items: end;
	display: grid;
	gap: 24px;
	grid-template-columns: minmax(0, 1.35fr) minmax(260px, .65fr);
	margin-bottom: 28px;
}

.course-pricing-heading h2 {
	font-size: clamp(2rem, 4vw, 3.25rem);
	line-height: 1.05;
	margin: 6px 0 0;
}

.course-pricing-heading > p {
	color: var(--muted);
	line-height: 1.65;
	margin: 0;
}

.course-pricing-grid {
	display: grid;
	gap: 14px;
	grid-template-columns: repeat(4, minmax(0, 1fr));
}

.course-plan-card {
	background: #fff;
	border: 1px solid var(--line);
	border-radius: 14px;
	display: flex;
	flex-direction: column;
	min-height: 284px;
	padding: 24px;
}

.course-plan-card.is-featured {
	border: 2px solid var(--blue);
	box-shadow: 0 18px 44px rgba(49, 87, 213, .12);
	transform: translateY(-6px);
}

.course-plan-card > span {
	color: var(--blue);
	font-size: .72rem;
	font-weight: 900;
	letter-spacing: .08em;
	text-transform: uppercase;
}

.course-plan-card h3 {
	font-size: 1.75rem;
	line-height: 1.1;
	margin: 10px 0;
}

.course-plan-card h3 small {
	color: var(--muted);
	font-family: var(--font-body);
	font-size: .72rem;
	font-weight: 700;
}

.course-plan-card p {
	color: var(--muted);
	font-size: .9rem;
	line-height: 1.58;
	margin: 0 0 22px;
}

.course-plan-card .button {
	justify-content: center;
	margin-top: auto;
	text-align: center;
}

.course-coupon-callout {
	background: #fff8dd;
	border: 1px solid #f3d98a;
	border-radius: 10px;
	color: #72521a;
	font-size: .84rem;
	margin: 18px 0 0;
	padding: 12px 14px;
	text-align: center;
}

@media (max-width: 1080px) {
	.course-pricing-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
	.course-plan-card.is-featured { transform: none; }
}

@media (max-width: 680px) {
	.course-archive-hero { padding: 54px 0 40px; }
	.course-archive-proof { align-items: stretch; flex-direction: column; }
	.course-archive-proof span { text-align: center; }
	.course-pricing-section { padding: 52px 0; }
	.course-pricing-heading { align-items: start; grid-template-columns: 1fr; }
	.course-pricing-grid { grid-template-columns: 1fr; }
	.course-plan-card { min-height: 0; }
}