/* ============================================
   Tutor Course Sessions - Professional App UI
   Color Scheme: Yellow (#FFB800) + White + Black
   Inspired by: Byju's, PW, Allen
   ============================================ */

:root {
	--ts-primary: #FFB800;
	--ts-primary-dark: #FF9800;
	--ts-primary-light: #FFC94D;
	--ts-live: #DC2626;
	--ts-recorded: #059669;
	--ts-upcoming: #3B82F6;
	--ts-text: #1F2937;
	--ts-text-light: #6B7280;
	--ts-text-lighter: #9CA3AF;
	--ts-white: #FFFFFF;
	--ts-bg: #F9FAFB;
	--ts-border: #E5E7EB;
	--ts-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
	--ts-shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
	--ts-shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.08);
	--ts-shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.1);
	--ts-radius: 16px;
	--ts-radius-lg: 20px;
	--ts-transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   Global Styles
   ============================================ */

.tutor-sessions-container {
	width: 100%;
	max-width: 100%;
	padding: 24px 0;
	font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
	color: var(--ts-text);
	background: linear-gradient(135deg, #FFFFFF 0%, #F3F4F6 100%);
	position: relative;
}

.tutor-sessions-container * {
	box-sizing: border-box;
}

/* Remove all underlines from links */
.tutor-sessions-container a,
.tutor-sessions-container a:hover,
.tutor-sessions-container a:active,
.tutor-sessions-container a:visited {
	text-decoration: none !important;
	outline: none;
}

/* ============================================
   Course Selector
   ============================================ */

.tutor-sessions-selector {
	background: var(--ts-white);
	padding: 20px 24px;
	border-radius: var(--ts-radius-lg);
	margin-bottom: 32px;
	box-shadow: var(--ts-shadow-lg);
	display: flex;
	align-items: flex-end;
	gap: 16px;
	flex-wrap: wrap;
	border: 2px solid transparent;
	transition: var(--ts-transition);
}

.tutor-sessions-selector:hover {
	border-color: var(--ts-primary);
	box-shadow: 0 15px 35px rgba(255, 184, 0, 0.15);
}

.tutor-sessions-selector label {
	font-weight: 700;
	color: var(--ts-text);
	font-size: 15px;
	letter-spacing: 0.3px;
	text-transform: uppercase;
	min-width: 100%;
	margin-bottom: 8px;
	display: block;
}

.tutor-sessions-selector select {
	flex: 1;
	min-width: 250px;
	padding: 14px 18px;
	border: 2px solid var(--ts-border);
	border-radius: 12px;
	font-size: 15px;
	font-weight: 500;
	background-color: var(--ts-white);
	color: var(--ts-text);
	cursor: pointer;
	transition: var(--ts-transition);
	appearance: none;
	background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23FFB800' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
	background-repeat: no-repeat;
	background-position: right 12px center;
	background-size: 20px;
	padding-right: 44px;
}

.tutor-sessions-selector select:hover {
	border-color: var(--ts-primary);
	box-shadow: 0 0 0 4px rgba(255, 184, 0, 0.1);
}

.tutor-sessions-selector select:focus {
	outline: none;
	border-color: var(--ts-primary);
	box-shadow: 0 0 0 4px rgba(255, 184, 0, 0.15);
}

/* ============================================
   Grid Layout
   ============================================ */

.tutor-sessions-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
	gap: 24px;
	width: 100%;
	animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
	from {
		opacity: 0;
		transform: translateY(20px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

/* ============================================
   No Content Message
   ============================================ */

.tutor-sessions-no-content,
.tutor-sessions-message {
	grid-column: 1 / -1;
	text-align: center;
	padding: 60px 30px;
	color: var(--ts-text-light);
	font-size: 18px;
	font-weight: 500;
	background: linear-gradient(135deg, var(--ts-white) 0%, var(--ts-bg) 100%);
	border-radius: var(--ts-radius-lg);
	border: 2px dashed var(--ts-border);
}

/* ============================================
   Session Card
   ============================================ */

.tutor-session-card {
	background: var(--ts-white);
	border-radius: var(--ts-radius-lg);
	overflow: hidden;
	transition: var(--ts-transition);
	box-shadow: var(--ts-shadow-md);
	display: flex;
	flex-direction: column;
	height: 100%;
	border: 1px solid var(--ts-border);
	position: relative;
	animation: slideUp 0.5s ease-out;
	animation-fill-mode: both;
}

@keyframes slideUp {
	from {
		opacity: 0;
		transform: translateY(30px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

.tutor-session-card:nth-child(1) {
	animation-delay: 0.05s;
}

.tutor-session-card:nth-child(2) {
	animation-delay: 0.1s;
}

.tutor-session-card:nth-child(3) {
	animation-delay: 0.15s;
}

.tutor-session-card:nth-child(4) {
	animation-delay: 0.2s;
}

.tutor-session-card:nth-child(n+5) {
	animation-delay: 0.25s;
}

.tutor-session-card:hover {
	box-shadow: var(--ts-shadow-xl);
	transform: translateY(-8px);
	border-color: var(--ts-primary);
}

.tutor-session-card.tutor-session-status-changed {
	animation: statusPulse 0.4s ease;
}

@keyframes statusPulse {
	0% {
		transform: scale(1);
	}
	50% {
		transform: scale(1.02);
	}
	100% {
		transform: scale(1);
	}
}

/* ============================================
   Thumbnail
   ============================================ */

.tutor-session-thumbnail {
	width: 100%;
	height: 200px;
	overflow: hidden;
	background: linear-gradient(135deg, var(--ts-bg) 0%, #E5E7EB 100%);
	position: relative;
}

.tutor-session-thumbnail img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.tutor-session-card:hover .tutor-session-thumbnail img {
	transform: scale(1.08);
}

/* Live Overlay */
.tutor-session-live-overlay {
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background: linear-gradient(180deg, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.4) 100%);
	display: flex;
	align-items: flex-end;
	padding: 16px;
}

.tutor-session-live-badge-overlay {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	padding: 8px 14px;
	background: rgba(220, 38, 38, 0.95);
	color: white;
	border-radius: 8px;
	font-weight: 700;
	font-size: 12px;
	letter-spacing: 0.8px;
	backdrop-filter: blur(8px);
}

.tutor-session-live-dot-overlay {
	display: inline-block;
	width: 8px;
	height: 8px;
	background: white;
	border-radius: 50%;
	animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
	0%, 100% {
		opacity: 1;
		transform: scale(1);
	}
	50% {
		opacity: 0.5;
		transform: scale(1.2);
	}
}

/* ============================================
   Content
   ============================================ */

.tutor-session-content {
	padding: 20px 20px;
	display: flex;
	flex-direction: column;
	flex-grow: 1;
	position: relative;
}

/* ============================================
   Title
   ============================================ */

.tutor-session-title {
	margin: 0 0 10px 0;
	font-size: 18px;
	font-weight: 700;
	color: var(--ts-text);
	line-height: 1.3;
	letter-spacing: -0.3px;
}

/* ============================================
   Description
   ============================================ */

.tutor-session-description {
	margin: 0 0 14px 0;
	font-size: 13px;
	color: var(--ts-text-light);
	line-height: 1.5;
	display: -webkit-box;
	-webkit-line-clamp: 2;
	-webkit-box-orient: vertical;
	overflow: hidden;
}

/* ============================================
   Meta Information
   ============================================ */

.tutor-session-meta {
	display: flex;
	align-items: center;
	gap: 12px;
	margin-bottom: 16px;
	flex-wrap: wrap;
}

.tutor-session-time {
	font-size: 13px;
	color: var(--ts-text-light);
	font-weight: 600;
	display: flex;
	align-items: center;
	gap: 4px;
	padding: 4px 8px;
	background: var(--ts-bg);
	border-radius: 6px;
}

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

.tutor-session-status-badge {
	display: inline-block;
}

.tutor-session-live-badge,
.tutor-session-upcoming-badge,
.tutor-session-recorded-badge {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	padding: 6px 12px;
	border-radius: 8px;
	font-size: 12px;
	font-weight: 700;
	letter-spacing: 0.4px;
	text-transform: uppercase;
	transition: var(--ts-transition);
}

/* Live Badge */
.tutor-session-live-badge {
	background: linear-gradient(135deg, rgba(220, 38, 38, 0.15) 0%, rgba(220, 38, 38, 0.08) 100%);
	color: var(--ts-live);
	border: 1px solid rgba(220, 38, 38, 0.2);
}

.tutor-session-live-dot {
	display: inline-block;
	width: 7px;
	height: 7px;
	background: var(--ts-live);
	border-radius: 50%;
	animation: pulse 1.5s ease-in-out infinite;
}

/* Upcoming Badge */
.tutor-session-upcoming-badge {
	background: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(59, 130, 246, 0.08) 100%);
	color: var(--ts-upcoming);
	border: 1px solid rgba(59, 130, 246, 0.2);
}

/* Recorded Badge */
.tutor-session-recorded-badge {
	background: linear-gradient(135deg, rgba(5, 150, 105, 0.15) 0%, rgba(5, 150, 105, 0.08) 100%);
	color: var(--ts-recorded);
	border: 1px solid rgba(5, 150, 105, 0.2);
}

/* ============================================
   Button
   ============================================ */

.tutor-session-btn {
	display: flex;
	align-items: center;
	justify-content: center;
	padding: 14px 18px;
	margin-top: auto;
	border: none;
	border-radius: 12px;
	font-size: 14px;
	font-weight: 700;
	text-align: center;
	cursor: pointer;
	transition: var(--ts-transition);
	text-decoration: none !important;
	width: 100%;
	box-sizing: border-box;
	letter-spacing: 0.3px;
	text-transform: uppercase;
	min-height: 50px;
	position: relative;
	overflow: hidden;
}

.tutor-session-btn::before {
	content: '';
	position: absolute;
	top: 50%;
	left: 50%;
	width: 0;
	height: 0;
	border-radius: 50%;
	background: rgba(255, 255, 255, 0.3);
	transform: translate(-50%, -50%);
	transition: width 0.6s, height 0.6s;
}

.tutor-session-btn:active::before {
	width: 300px;
	height: 300px;
}

/* Active Button (Live / Recorded) */
.tutor-session-btn-active {
	background: linear-gradient(135deg, var(--ts-primary) 0%, var(--ts-primary-dark) 100%);
	color: var(--ts-white);
	box-shadow: 0 4px 15px rgba(255, 184, 0, 0.3);
	font-weight: 700;
	position: relative;
	z-index: 1;
}

.tutor-session-btn-active:hover {
	box-shadow: 0 8px 25px rgba(255, 184, 0, 0.4);
	transform: translateY(-4px);
	background: linear-gradient(135deg, var(--ts-primary-dark) 0%, #E88D00 100%);
}

.tutor-session-btn-active:active {
	transform: translateY(-2px);
}

/* Disabled Button (Upcoming) */
.tutor-session-btn-disabled {
	background: var(--ts-bg);
	color: var(--ts-text-lighter);
	border: 2px solid var(--ts-border);
	cursor: not-allowed;
	opacity: 0.6;
	font-weight: 600;
}

.tutor-session-btn-disabled:hover {
	background: var(--ts-bg);
	transform: none;
	box-shadow: none;
	opacity: 0.6;
}

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

@media (max-width: 768px) {
	:root {
		--ts-radius: 14px;
		--ts-radius-lg: 18px;
	}

	.tutor-sessions-container {
		padding: 16px 0;
	}

	.tutor-sessions-selector {
		flex-direction: column;
		align-items: stretch;
		gap: 12px;
		margin-bottom: 24px;
		padding: 16px 18px;
	}

	.tutor-sessions-selector label {
		min-width: auto;
		font-size: 14px;
		margin-bottom: 6px;
	}

	.tutor-sessions-selector select {
		min-width: 100%;
		flex: none;
	}

	.tutor-sessions-grid {
		grid-template-columns: 1fr;
		gap: 18px;
	}

	.tutor-session-card {
		border-radius: 18px;
	}

	.tutor-session-thumbnail {
		height: 180px;
	}

	.tutor-session-content {
		padding: 16px 16px;
	}

	.tutor-session-title {
		font-size: 16px;
		margin-bottom: 8px;
	}

	.tutor-session-description {
		font-size: 13px;
	}

	.tutor-session-btn {
		padding: 12px 16px;
		font-size: 13px;
		min-height: 48px;
		border-radius: 10px;
	}
}

@media (max-width: 480px) {
	.tutor-sessions-container {
		padding: 12px 0;
		background: var(--ts-white);
	}

	.tutor-sessions-selector {
		margin-bottom: 18px;
		padding: 14px 14px;
		box-shadow: var(--ts-shadow-sm);
	}

	.tutor-sessions-selector label {
		font-size: 13px;
	}

	.tutor-sessions-grid {
		gap: 14px;
	}

	.tutor-session-card {
		border-radius: 14px;
		box-shadow: var(--ts-shadow-sm);
	}

	.tutor-session-thumbnail {
		height: 160px;
	}

	.tutor-session-content {
		padding: 14px;
	}

	.tutor-session-title {
		font-size: 15px;
		margin-bottom: 6px;
	}

	.tutor-session-description {
		font-size: 12px;
		-webkit-line-clamp: 1;
	}

	.tutor-session-meta {
		gap: 8px;
		margin-bottom: 12px;
	}

	.tutor-session-time {
		font-size: 12px;
		padding: 3px 6px;
	}

	.tutor-session-live-badge,
	.tutor-session-upcoming-badge,
	.tutor-session-recorded-badge {
		padding: 5px 10px;
		font-size: 11px;
	}

	.tutor-session-btn {
		padding: 11px 14px;
		font-size: 12px;
		min-height: 46px;
		border-radius: 9px;
	}
}

/* Print Styles */
@media print {
	.tutor-sessions-selector {
		display: none;
	}

	.tutor-session-btn {
		display: none;
	}
}