/* =========================================
   Custom styles for Bill Liu's portfolio
   Supplements the Dimension HTML5UP theme
   ========================================= */

/* --- Timeline --- */
.timeline {
	position: relative;
	margin: 1.5em 0 2em;
	padding-left: 1.4em;
}

.timeline::before {
	content: '';
	position: absolute;
	left: 0;
	top: 4px;
	bottom: 0;
	width: 2px;
	background: linear-gradient(
		to bottom,
		rgba(255, 255, 255, 0.35),
		rgba(255, 255, 255, 0.05)
	);
}

.timeline-item {
	position: relative;
	margin-bottom: 2em;
	padding-left: 1.2em;
}

.timeline-item::before {
	content: '';
	position: absolute;
	left: -1.6em;
	top: 7px;
	width: 10px;
	height: 10px;
	border-radius: 50%;
	background: #fff;
	box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.15);
}

.timeline-content h3 {
	font-size: 1.05em;
	font-weight: 600;
	color: #fff;
	margin-bottom: 0.25em;
}

.timeline-content h4 {
	font-size: 0.88em;
	color: rgba(255, 255, 255, 0.55);
	margin-bottom: 0.75em;
	display: flex;
	align-items: center;
	gap: 0.6em;
	flex-wrap: wrap;
}

.timeline-content h4 .period {
	background: rgba(255, 255, 255, 0.1);
	border: 1px solid rgba(255, 255, 255, 0.15);
	padding: 1px 9px;
	border-radius: 20px;
	font-size: 0.9em;
	color: rgba(255, 255, 255, 0.65);
}

.timeline-content ul {
	list-style: disc;
	padding-left: 1.1em;
}

.timeline-content ul li {
	font-size: 0.88em;
	line-height: 1.6;
	color: rgba(255, 255, 255, 0.78);
	margin-bottom: 0.3em;
}

/* --- Education block --- */
.edu-block {
	border-top: 1px solid rgba(255, 255, 255, 0.15);
	padding-top: 1.5em;
	margin-top: 0.5em;
}

.edu-block h3 {
	font-size: 0.9em;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.08em;
	color: rgba(255, 255, 255, 0.45);
	margin-bottom: 0.6em;
}

.edu-block p {
	font-size: 0.92em;
	color: rgba(255, 255, 255, 0.85);
	margin-bottom: 0.3em;
}

.edu-block .edu-note {
	font-size: 0.82em;
	color: rgba(255, 255, 255, 0.5);
	font-style: italic;
}

/* --- Skills --- */
.skill-section {
	margin-bottom: 1.6em;
}

.skill-section h3 {
	font-size: 0.8em;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.1em;
	color: rgba(255, 255, 255, 0.4);
	margin-bottom: 0.6em;
}

.skill-grid {
	display: flex;
	flex-wrap: wrap;
	gap: 0.45em;
}

.skill-tag {
	background: rgba(255, 255, 255, 0.09);
	border: 1px solid rgba(255, 255, 255, 0.18);
	color: rgba(255, 255, 255, 0.85);
	padding: 4px 12px;
	border-radius: 20px;
	font-size: 0.8em;
	transition: background 0.2s, border-color 0.2s;
	cursor: default;
}

.skill-tag:hover {
	background: rgba(255, 255, 255, 0.16);
	border-color: rgba(255, 255, 255, 0.35);
}

.skill-tag.tech {
	border-color: rgba(100, 180, 255, 0.35);
	color: rgba(180, 220, 255, 0.92);
}

.skill-tag.tech:hover {
	background: rgba(100, 180, 255, 0.1);
}

.skill-tag.soft {
	border-color: rgba(150, 255, 180, 0.3);
	color: rgba(180, 255, 200, 0.88);
}

.skill-tag.soft:hover {
	background: rgba(150, 255, 180, 0.08);
}

/* --- Projects --- */
.projects-intro {
	font-size: 0.9em;
	color: rgba(255, 255, 255, 0.65);
	margin-bottom: 1.8em;
	line-height: 1.6;
}

.project-card {
	background: rgba(255, 255, 255, 0.04);
	border: 1px solid rgba(255, 255, 255, 0.1);
	border-radius: 10px;
	padding: 1.4em 1.6em;
	margin-bottom: 1.2em;
	transition: background 0.2s, border-color 0.2s, transform 0.2s;
}

.project-card:hover {
	background: rgba(255, 255, 255, 0.07);
	border-color: rgba(255, 255, 255, 0.22);
	transform: translateY(-2px);
}

.project-header {
	display: flex;
	align-items: flex-start;
	gap: 0.9em;
	margin-bottom: 0.7em;
}

.project-icon {
	font-size: 1.6em;
	line-height: 1;
	flex-shrink: 0;
}

.project-header > div {
	flex: 1;
}

.project-header h3 {
	font-size: 1em;
	font-weight: 600;
	color: #fff;
	margin: 0 0 0.35em;
}

.project-tag {
	display: inline-block;
	font-size: 0.72em;
	padding: 2px 8px;
	border-radius: 10px;
	background: rgba(255, 255, 255, 0.08);
	border: 1px solid rgba(255, 255, 255, 0.15);
	color: rgba(255, 255, 255, 0.55);
	margin-right: 0.3em;
}

.project-card > p {
	font-size: 0.86em;
	color: rgba(255, 255, 255, 0.65);
	line-height: 1.65;
	margin-bottom: 1em;
}

.button.small {
	font-size: 0.78em;
	padding: 0.45em 1.1em;
	height: auto;
	line-height: 1.6;
	background: transparent;
	border: 1px solid rgba(255, 255, 255, 0.28);
	color: rgba(255, 255, 255, 0.75);
	border-radius: 4px;
	text-decoration: none;
	transition: background 0.2s, border-color 0.2s, color 0.2s;
	display: inline-block;
}

.button.small:hover {
	background: rgba(255, 255, 255, 0.1);
	border-color: rgba(255, 255, 255, 0.5);
	color: #fff;
}

/* --- Blockquote --- */
blockquote {
	border-left: 3px solid rgba(255, 255, 255, 0.25);
	padding: 0.8em 1.2em;
	margin: 1.4em 0;
	font-style: italic;
	color: rgba(255, 255, 255, 0.65);
	background: rgba(255, 255, 255, 0.03);
	border-radius: 0 6px 6px 0;
	font-size: 0.95em;
	line-height: 1.7;
}

/* --- Contact iframe --- */
#contact iframe {
	display: block;
	width: 100%;
	border-radius: 8px;
	margin-bottom: 1.5em;
}

/* --- Responsive tweaks --- */
@media screen and (max-width: 480px) {
	.timeline {
		padding-left: 1em;
	}
	.skill-grid {
		gap: 0.35em;
	}
	.project-header {
		flex-direction: column;
		gap: 0.5em;
	}
}