.bbt-timeline{
	--bbt-tl-accent:#4fb3ff;
	--bbt-tl-linew:4px;
	--bbt-tl-gap:70px;
	--bbt-tl-cardbg:#fff;
	--bbt-tl-radius:10px;
	--bbt-tl-cardmax:560px;
	--bbt-tl-cardmin:280px;
	--bbt-tl-shadow:1;
	--bbt-tl-shadowpx:12px;
	--bbt-tl-container:1200px;
	--bbt-tl-linestart: 0px; /* trims line above first dot */
	--bbt-tl-lineend: 0px;   /* trims line below last dot */
	position: relative;
	width:100%;
	max-width: var(--bbt-tl-container);
	margin-left:auto;
	margin-right:auto;
	padding: 0 16px;
}

.bbt-timeline__inner{
	position:relative;
}

.bbt-timeline__inner::before{
	content:"";
	position:absolute;
	left:50%;
	transform:translateX(-50%);
	top: var(--bbt-tl-linestart);
	bottom: var(--bbt-tl-lineend);
	width: var(--bbt-tl-linew);
	background: var(--bbt-tl-accent); /* blue bar */
	border-radius: 999px;
}

.bbt-timeline__row{
	display:grid;
	grid-template-columns: minmax(0,1fr) 90px minmax(0,1fr);
	align-items:start;
	column-gap: 24px;
	padding: calc(var(--bbt-tl-gap) / 2) 0;
}

.bbt-timeline__mid{
	display:flex;
	flex-direction:column;
	align-items:center;
	position:relative;
}

.bbt-timeline__year{
	position:relative;
	background:#555;
	color:#fff;
	font-weight:700;
	font-size:14px;
	line-height:1.1;
	padding:10px 14px;
	border-radius:999px;
	text-align:center;
	box-shadow: 0 4px 10px rgba(0,0,0,.15);
}

.bbt-timeline__year::after{
	content:"";
	position:absolute;
	left:50%;
	transform:translateX(-50%);
	bottom:-10px;
	width:2px;
	height:10px;
	background: var(--bbt-tl-accent);
	border-radius:999px;
}

/* horizontal connector from dot to the card edge (length is computed in view.js) */
.bbt-timeline__row { --bbt-tl-conn: 44px; }

.bbt-timeline__dot::after{
	content:"";
	position:absolute;
	top:50%;
	transform: translateY(-50%);
	height:2px;
	background: var(--bbt-tl-accent);
	width: var(--bbt-tl-conn);
}
.bbt-timeline__row--right .bbt-timeline__dot::after{ left:100%; }
.bbt-timeline__row--left  .bbt-timeline__dot::after{ right:100%; }


.bbt-timeline__dot{
	margin-top:10px;
	width:18px;
	height:18px;
	border-radius:999px;
	background:#fff;
	border:3px solid var(--bbt-tl-accent);
	box-shadow: 0 3px 10px rgba(0,0,0,.12);
	position:relative;
}

.bbt-timeline__dot::before{
	content:"";
	position:absolute;
	left:50%;
	transform:translateX(-50%);
	top:-10px;
	width:2px;
	height:10px;
	background: var(--bbt-tl-accent);
	border-radius:999px;
}

.bbt-timeline__col{
	display:flex;
}

.bbt-timeline__row--right .bbt-timeline__col--right{ justify-content:flex-start; }
.bbt-timeline__row--right .bbt-timeline__col--left{ justify-content:flex-end; }

.bbt-timeline__row--left .bbt-timeline__col--left{ justify-content:flex-end; }
.bbt-timeline__row--left .bbt-timeline__col--right{ justify-content:flex-start; }

.bbt-timeline__card{
	background: var(--bbt-tl-cardbg);
	border-radius: var(--bbt-tl-radius);
	padding: 18px 20px;
	max-width: var(--bbt-tl-cardmax);
	min-width: var(--bbt-tl-cardmin);
	box-shadow: 0 6px var(--bbt-tl-shadowpx) rgba(0,0,0, calc(var(--bbt-tl-shadow) * 0.12));
	border-left: 3px solid var(--bbt-tl-accent); /* default (right-side cards) */
}

.bbt-timeline__row--left .bbt-timeline__card{
	border-left:0;
	border-right:3px solid var(--bbt-tl-accent); /* curve/stripe faces the line */
}

.bbt-timeline__title{
	margin: 0 0 12px 0;
	font-size: 22px;
	line-height: 1.2;
	color: var(--bbt-tl-accent);
	font-weight: 700;
}

.bbt-timeline__image img{
	max-width: 100%;
	height: auto;
	display:block;
	margin: 10px 0 12px 0;
}

.bbt-timeline__desc{
	color:#333;
	font-size:15px;
	line-height:1.6;
}

/* Side labels (small text opposite the card) */
.bbt-timeline__sidelabel{
	margin-top: 6px; /* align with year badge */
	font-size: 12px;
	color: rgba(0,0,0,.55);
	max-width: 240px;
}

.bbt-timeline__sidelabel--left{
	text-align:right;
}
.bbt-timeline__sidelabel--right{
	text-align:left;
}

/* Forced layouts shift the line */
.bbt-timeline--left .bbt-timeline__inner::before{ left:40px; transform:none; }
.bbt-timeline--right .bbt-timeline__inner::before{ left: calc(100% - 40px); transform:none; }

.bbt-timeline--left .bbt-timeline__row,
.bbt-timeline--right .bbt-timeline__row{ grid-template-columns: 90px minmax(0,1fr); }

.bbt-timeline--left .bbt-timeline__col--right{ display:none; }
.bbt-timeline--right .bbt-timeline__col--left{ display:none; }

@media (max-width: 782px){
	.bbt-timeline__inner::before{ left:32px; transform:none; }
	.bbt-timeline__row{ grid-template-columns: 90px minmax(0,1fr); }
	.bbt-timeline__col--left{ display:none; }
	.bbt-timeline__card{ min-width: 0; max-width: 100%; }
	.bbt-timeline__sidelabel{ display:none; }
	.bbt-timeline__row--right .bbt-timeline__mid::after,
	.bbt-timeline__row--left  .bbt-timeline__mid::after{ left:32px; right:auto; width: 20px; }
}