.timeline-container {
	background: rgba(255, 255, 255, 0.95);
	border-radius:20px 20px 0 0;
	padding: 4rem 3rem;
	max-width: 900px;
	width: 100%;
	box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
		0 10px 10px -5px rgba(0, 0, 0, 0.04);
	text-align: center;
	transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
	border: 1px solid rgba(226, 232, 240, 0.8);
	backdrop-filter: blur(10px);
}

.timeline-header {
	margin-bottom: 3rem;
}

.timeline-title {
	font-size: 2.5rem;
	font-weight: 700;
	margin-bottom: 0.5rem;
	opacity: 0;
	animation: fadeInUptTitle 1s cubic-bezier(0.22, 1, 0.36, 1) forwards;
	color: #1e293b;
	letter-spacing: -0.025em;
}

.timeline-subtitle {
	font-size: 1.125rem;
	font-weight: 400;
	opacity: 0;
	animation: fadeInUptTitle 1s cubic-bezier(0.22, 1, 0.36, 1) 0.2s forwards;
	color: #00000061;
	letter-spacing: 0.025em;
}
@keyframes fadeInUptTitle {
	from {
		opacity: 0;
		transform: translateY(30px);
	}
	to {
		opacity: 1;
		transform: translateY(-5px);
	}
	to {
		transform: translateY(0);
		opacity: 1;
	}
}

.timeline-content {
	margin-bottom: 4rem;
	min-height: 320px;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
	position: relative;
}

.event-icon {
	width: 72px;
	height: 72px;
	background: linear-gradient(135deg, #6366f1, #8b5cf6);
	border-radius: 20px;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 2rem;
	margin-bottom: 2rem;
	color: white;
	box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
	transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.event-year {
	font-size: 3.5rem;
	font-weight: 700;
	margin-bottom: 0.75rem;
	color: #00000094;
	letter-spacing: -0.05em;
}

.event-company {
	font-size: 1.5rem;
	font-weight: 600;
	margin-bottom: 1.25rem;
	color: #00000094;
	letter-spacing: -0.025em;
}

.event-description {
	font-size: 1.5rem;
	font-weight: 400;
	max-width: 550px;
	line-height: 1.7;
	color: #2121239c;
	letter-spacing: 0.015em;
}

.slider-container {
	position: relative;
	margin: 3rem 0 0 0;
	padding: 0 1rem;
}

.slider-track {
	position: relative;
	height: 6px;
	background: #08080833;
	border-radius: 8px;
	margin-bottom: 2rem;
	user-select: none;
}

.progress-fill {
	position: absolute;
	top: 0;
	left: 0;
	height: 6px;
	background: linear-gradient(90deg, #6366f1, #8b5cf6);
	border-radius: 8px;
	width: 0%;
	transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.tick {
	position: absolute;
	top: -4px;
	width: 2px;
	height: 14px;
	background: #08080833;
	border-radius: 1px;
	transform: translateX(-1px);
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.tick.active {
	background: linear-gradient(135deg, #6366f1, #8b5cf6);
	height: 18px;
	top: -6px;
	width: 3px;
	box-shadow: 0 0 8px rgba(99, 102, 241, 0.4);
}

.year-labels {
	display: flex;
	justify-content: space-between;
	padding: 0 1rem;
	font-size: 0.875rem;
	color: #94a3b8;
	font-weight: 500;
	user-select: none;
	letter-spacing: 0.025em;
	position: relative;
}

.year-label {
	transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
	position: relative;
	transform: translateX(-50%);
	white-space: nowrap;
}

.year-label.active {
	color: #6366f1;
	font-weight: 700;
	transform: translateX(-50%) scale(1.1);
	text-shadow: 0 0 8px rgba(99, 102, 241, 0.3);
}

.timeline-slider {
	-webkit-appearance: none;
	appearance: none;
	width: 100%;
	height: 6px;
	background: transparent;
	outline: none;
	position: absolute;
	top: 4px;
	left: 0;
	margin: 0;
	cursor: pointer;
	z-index: 10;
}

.timeline-slider::-webkit-slider-thumb {
	-webkit-appearance: none;
	appearance: none;
	width: 22px;
	height: 22px;
	border-radius: 50%;
	background: white;
	border: 3px solid #6366f1;
	cursor: pointer;
	box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
	margin-top: -8px;
	position: relative;
	z-index: 2;
}

/* Early Web */
.era-early-web .timeline-slider::-webkit-slider-thumb {
	border-color: #0284c7; /* same as .year-label.active in era-early-web */
}

/* Dot-Com Era */
.era-dot-com .timeline-slider::-webkit-slider-thumb {
	border-color: #d97706; /* same as .year-label.active in era-dot-com */
}

/* Social Media Era */
.era-social-media .timeline-slider::-webkit-slider-thumb {
	border-color: #dc2626;
}

/* Mobile Era */
.era-mobile .timeline-slider::-webkit-slider-thumb {
	border-color: #059669;
}

/* Modern Era */
.era-modern .timeline-slider::-webkit-slider-thumb {
	border-color: #4b5563;
}

/* Future Tech Era */
.era-future-tech .timeline-slider::-webkit-slider-thumb {
	border-color: #7c3aed;
}

.timeline-slider::-webkit-slider-thumb:hover {
	transform: scale(1.15);
	box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5),
		0 0 0 8px rgba(99, 102, 241, 0.1);
	border-color: #8b5cf6;
}
.era-early-web .timeline-slider::-webkit-slider-thumb:hover {
	transform: scale(1.15);
	box-shadow: 0 6px 20px rgba(14, 165, 233, 0.5),
		0 0 0 8px rgba(14, 165, 233, 0.1);
	border-color: #0284c7;
}
.era-dot-com .timeline-slider::-webkit-slider-thumb:hover {
	transform: scale(1.15);
	box-shadow: 0 6px 20px rgba(245, 158, 11, 0.5),
		0 0 0 8px rgba(245, 158, 11, 0.1);
	border-color: #d97706;
}
.era-social-media .timeline-slider::-webkit-slider-thumb:hover {
	transform: scale(1.15);
	box-shadow: 0 6px 20px rgba(239, 68, 68, 0.5), 0 0 0 8px rgba(239, 68, 68, 0.1);
	border-color: #dc2626;
}
.era-mobile .timeline-slider::-webkit-slider-thumb:hover {
	transform: scale(1.15);
	box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5),
		0 0 0 8px rgba(16, 185, 129, 0.1);
	border-color: #059669;
}
.era-modern .timeline-slider::-webkit-slider-thumb:hover {
	transform: scale(1.15);
	box-shadow: 0 6px 20px rgba(107, 114, 128, 0.5),
		0 0 0 8px rgba(107, 114, 128, 0.1);
	border-color: #4b5563;
}
.era-future-tech .timeline-slider::-webkit-slider-thumb:hover {
	transform: scale(1.15);
	box-shadow: 0 6px 20px rgba(168, 85, 247, 0.5),
		0 0 0 8px rgba(168, 85, 247, 0.1);
	border-color: #7c3aed;
}

.timeline-slider::-webkit-slider-thumb:active {
	transform: scale(1.05);
	box-shadow: 0 4px 12px rgba(99, 102, 241, 0.6),
		0 0 0 4px rgba(99, 102, 241, 0.2);
}

.timeline-slider::-moz-range-thumb {
	width: 22px;
	height: 22px;
	border-radius: 50%;
	background: white;
	border: 3px solid #6366f1;
	cursor: pointer;
	box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
	transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
	position: relative;
	z-index: 2;
}

.timeline-slider::-moz-range-thumb:hover {
	transform: scale(1.15);
	box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
	border-color: #8b5cf6;
}

.fade-transition {
	animation: fadeOutDown 0.35s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.fade-in {
	animation: fadeInUpContent 0.5s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

/* Staggered entrance for content children */
.timeline-content .fade-in:nth-child(1) {
	animation-delay: 0s;
}
.timeline-content .fade-in:nth-child(2) {
	animation-delay: 0.1s;
}
.timeline-content .fade-in:nth-child(3) {
	animation-delay: 0.2s;
}
.timeline-content .fade-in:nth-child(4) {
	animation-delay: 0.3s;
}

.event-icon.fade-out {
	animation: fadeOutDown 0.3s ease-in-out forwards;
}

.event-year.fade-out,
.event-company.fade-out,
.event-description.fade-out {
	animation: fadeOutDown 0.25s ease-in-out forwards;
}

/* Era-specific theming */
.era-early-web {
	background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
	transition: background 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.era-early-web .event-icon {
	background: linear-gradient(135deg, #0ea5e9, #0284c7);
	box-shadow: 0 10px 25px rgba(14, 165, 233, 0.3);
}
.era-early-web .progress-fill {
	background: linear-gradient(90deg, #0ea5e9, #0284c7);
}
.era-early-web .timeline-slider::-webkit-slider-thumb,
.era-early-web .timeline-slider::-moz-range-thumb {
	border-color: #0ea5e9;
}
.era-early-web .tick.active {
	background: linear-gradient(135deg, #0ea5e9, #0284c7);
}
.era-early-web .year-label.active {
	color: #0284c7;
	text-shadow: 0 0 8px rgba(14, 165, 233, 0.3);
}

.era-dot-com {
	background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
	transition: background 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.era-dot-com .event-icon {
	background: linear-gradient(135deg, #f59e0b, #d97706);
	box-shadow: 0 10px 25px rgba(245, 158, 11, 0.3);
}
.era-dot-com .progress-fill {
	background: linear-gradient(90deg, #f59e0b, #d97706);
}
.era-dot-com .timeline-slider::-webkit-slider-thumb,
.era-dot-com .timeline-slider::-moz-range-thumb {
	border-color: #f59e0b;
}
.era-dot-com .tick.active {
	background: linear-gradient(135deg, #f59e0b, #d97706);
}
.era-dot-com .year-label.active {
	color: #d97706;
	text-shadow: 0 0 8px rgba(245, 158, 11, 0.3);
}

.era-social-media {
	background: linear-gradient(135deg, #fef2f2 0%, #fde2e2 100%);
	transition: background 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.era-social-media .event-icon {
	background: linear-gradient(135deg, #ef4444, #dc2626);
	box-shadow: 0 10px 25px rgba(239, 68, 68, 0.3);
}
.era-social-media .progress-fill {
	background: linear-gradient(90deg, #ef4444, #dc2626);
}
.era-social-media .timeline-slider::-webkit-slider-thumb,
.era-social-media .timeline-slider::-moz-range-thumb {
	border-color: #ef4444;
}
.era-social-media .tick.active {
	background: linear-gradient(135deg, #ef4444, #dc2626);
}
.era-social-media .year-label.active {
	color: #dc2626;
	text-shadow: 0 0 8px rgba(239, 68, 68, 0.3);
}

.era-mobile {
	background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
	transition: background 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.era-mobile .event-icon {
	background: linear-gradient(135deg, #10b981, #059669);
	box-shadow: 0 10px 25px rgba(16, 185, 129, 0.3);
}
.era-mobile .progress-fill {
	background: linear-gradient(90deg, #10b981, #059669);
}
.era-mobile .timeline-slider::-webkit-slider-thumb,
.era-mobile .timeline-slider::-moz-range-thumb {
	border-color: #10b981;
}
.era-mobile .tick.active {
	background: linear-gradient(135deg, #10b981, #059669);
}
.era-mobile .year-label.active {
	color: #059669;
	text-shadow: 0 0 8px rgba(16, 185, 129, 0.3);
}

.era-modern {
	background: linear-gradient(135deg, #f9fafb 0%, #f3f4f6 100%);
	transition: background 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.era-modern .event-icon {
	background: linear-gradient(135deg, #6b7280, #4b5563);
	box-shadow: 0 10px 25px rgba(107, 114, 128, 0.3);
}
.era-modern .progress-fill {
	background: linear-gradient(90deg, #6b7280, #4b5563);
}
.era-modern .timeline-slider::-webkit-slider-thumb,
.era-modern .timeline-slider::-moz-range-thumb {
	border-color: #6b7280;
}
.era-modern .tick.active {
	background: linear-gradient(135deg, #6b7280, #4b5563);
}
.era-modern .year-label.active {
	color: #4b5563;
	text-shadow: 0 0 8px rgba(107, 114, 128, 0.3);
}

.era-future-tech {
	background: linear-gradient(135deg, #fdf4ff 0%, #f3e8ff 100%);
	transition: background 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.era-future-tech .event-icon {
	background: linear-gradient(135deg, #a855f7, #7c3aed);
	box-shadow: 0 10px 25px rgba(168, 85, 247, 0.3);
}
.era-future-tech .progress-fill {
	background: linear-gradient(90deg, #a855f7, #7c3aed);
}
.era-future-tech .timeline-slider::-webkit-slider-thumb,
.era-future-tech .timeline-slider::-moz-range-thumb {
	border-color: #a855f7;
}
.era-future-tech .tick.active {
	background: linear-gradient(135deg, #a855f7, #7c3aed);
}
.era-future-tech .year-label.active {
	color: #7c3aed;
	text-shadow: 0 0 8px rgba(168, 85, 247, 0.3);
}

@media (max-width: 768px) {
	body {
		padding: 1rem;
	}

	.timeline-container {
		padding: 2.5rem 2rem;
		margin: 0;
		border-radius: 16px;
	}

	.timeline-title {
		font-size: 2rem;
	}

	.timeline-subtitle {
		font-size: 1rem;
	}

	.event-year {
		font-size: 2.5rem;
	}

	.event-company {
		font-size: 1.25rem;
	}

	.event-description {
		font-size: 1rem;
	}

	.event-icon {
		width: 60px;
		height: 60px;
		font-size: 1.5rem;
		margin-bottom: 1.5rem;
	}

	.timeline-content {
		min-height: 280px;
		margin-bottom: 3rem;
	}

	.slider-container {
		padding: 0 0.5rem;
	}

	.year-labels {
		padding: 0 0.5rem;
		font-size: 0.75rem;
	}
}

@media (max-width: 480px) {
	.timeline-container {
		padding: 2rem 1.5rem;
		padding-bottom: 3.5rem;
	}

	.timeline-title {
		font-size: 1.75rem;
	}

	.event-year {
		font-size: 2rem;
	}

	.year-labels {
		font-size: 0.7rem;
		flex-direction: column;
		align-items: flex-start;
	}

	.year-label {
		transform: rotate(90deg) translateY(0) !important;
		transform-origin: top left;
	}
}

/* Animation keyframes */
@keyframes fadeInUp {
	from {
		opacity: 0;
		transform: translateY(30px);
	}
	60% {
		opacity: 1;
		transform: translateY(-5px);
	}
	to {
		transform: translateY(0);
	}
}

@keyframes fadeOutDown {
	from {
		opacity: 1;
		transform: translateY(0);
	}
	40% {
		transform: translateY(5px);
	}
	to {
		opacity: 0;
		transform: translateY(20px);
	}
}

@keyframes fadeInUpContent {
	from {
		opacity: 0;
		transform: translateY(-20px);
	}
	60% {
		opacity: 1;
		transform: translateY(3px);
	}
	to {
		transform: translateY(0);
	}
}