:root {
	--color-gray-light-1: #f8f8f8;
	--color-gray-light-2: #e9e9e9;
	--color-gray-light-3: #dedede;
	--color-gray-dark-1: #545454;
	--color-gray-dark-2: #737373;
	--color-gray-dark-3: #9a9a9a;
	--color-blue-dark-1: #00387f;
	--color-tiffany: #00a6a6;
	--profile-theme: #4682bf;
	--timeline-circle-theme: #14253e;
	
	--pgbar-length: 100%;

	--MATH-PI: 3.1415px;
	--percent: 100;
}

html {
	font-size: 100%;
}

* {
	box-sizing: border-box;
	
}

body {
	margin: 0;
	padding: 3rem 1rem;
	min-height: 100vh;
	font-family: var(--primary-font);
}

.wrapper {
	margin: 0 auto;
	max-width: 70rem;
	display: flex;
	flex-wrap: wrap;
}

.intro {
	flex: 0 0 250px;
	background-color: var(--color-gray-light-1);
	box-shadow: 5px 0px 15px 0px #b3b3b3;
	z-index: 5;
}
.profile {
	position: relative;
	background-color: var(--primary-color);
	padding: 2rem 1rem;
	margin-bottom: 50px;
	text-align: center;
	user-select: none;
}

.profile::after {
	content: " ";
	position: absolute;
	left: 0;
	bottom: -15px;
	width: 100%;
	height: 30px;
		background-color: var(--tertiary-color);

	transform: skewY(-5deg);
}
.photo {
	display: flex;
	justify-content: center;
	align-items: center;
}

.photo img {
	width: 100%;
	max-width: 280px;    /* XL screens */
	min-width: 90px;     /* Small screens */
	border-radius: 50%;
	object-fit: cover;
	transition: 0.3s ease;
}

/* Medium Screens */
@media (max-width: 992px) {
	.photo img {
		max-width: 450px;
		width: 100%;

	}
}

/* Small Screens */
@media (max-width: 768px) {
	.photo {
		display: flex;
		justify-content: center;
		align-items: center;
		max-width: 450px;
		width: 100%;
	}
}

/* Extra Small Screens */
@media (max-width: 480px) {
	.photo img {
		max-width: 450px;
		width: 100%;
	}
	.intro {
		flex: 0 0 100%; /* intro becomes full-width on mobile */
	}
}
.bio .name {
	font-size: 1.5rem;
	text-align: center;
	color: var(--color-gray-light-1);
	margin: 0;
	margin-top: 1rem;
}
.bio .profession {
	font-size: 1rem;
	text-align: center;
	color: var(--color-gray-light-1);
	margin: 0;
}

.intro-section {
	padding: 0 1rem;
	font-family: var(--text-font);
}
.intro-section .title {
	font-size: 1rem;
	font-weight: bold;
	text-transform: uppercase;
	letter-spacing: 1px;
}
.about .paragraph {
	text-align: justify;
}

.about .title {
	text-align: left;
}
.info-section {
	margin: 1rem 0;
}
.info-section span {
	position: relative;
	transition: all 0.3s;
}
.info-section {
    margin: 1rem 0;
    display: flex;
    align-items: center;
    gap: 10px; /* space between icon and text */
}
.info-section i, 
.info-section img {
    width: 20px;
    height: 20px;
}


.link a {
	text-decoration: none;
	color: inherit;
}

.link span::after {
	position: absolute;
	content: '';
	left: 50%;
	bottom: -3px;
	width: 0;
	height: 2px;
	background-color: var(--primary-color);
	transition: width 0.3s;
	/*transition-timing-function: cubic-bezier(.64,.51,.16,.86);*/
	transition-timing-function: cubic-bezier(.92,.57,.33,1.02);
	transform: translate(-50%, 0);
}

.link span:hover {
	color: var(--primary-color);
}
.link span:hover::after {
	width: 100%;
}

/* Detail section overall setting*/
.detail {
	flex: 1 0 0;
	background-color: white;
	padding: 2rem;
}
.detail:hover > .detail-section:not(:hover) {
	opacity: 0.3;
}
.detail-section {
	transition: all 0.3s;
}
.detail-section:not(:last-of-type) {
	padding-bottom: 1rem;
}
.detail-title {
	display: flex;
	align-items: center;
	font-family: var(--primary-font);
	font-weight: 800;
	text-transform: uppercase;
}
.detail-section > .detail-content {
	padding: 1.5rem;
	padding-left: 2rem;
	user-select: none;
}
.detail-section.edu > .detail-content {
	padding-left: calc(1.5rem + 10px);
}
.title-icon + span {
	font-size: 1.5rem;
	transition: all 0.3s;
}
.title-icon {
	display: inline-flex;
	justify-content: center;
	align-items: center;
	margin-right: 1rem;
	padding: .1rem;
	width: 3.5rem;
	height: 3.5rem;
	background-color: var(--primary-color);
	border-radius: 50%;
	transition: all 0.3s;
}
.title-icon img {
    width: 70%;
    height: 70%;
    object-fit: contain;
}

.detail-section:hover .title-icon {
	transform: scale(1.5);
	margin-right: 1.5rem;
}
.detail-section:hover .title-icon + span {
	letter-spacing: 1.5px;
}

/* time line block in education section */
.timeline-block {
	position: relative;
	padding-left: 30px;
}
.timeline-block:not(:last-of-type) {
	margin-bottom: 1rem;	
}
.timeline-block h1 {
	font-size: 1rem;
	margin: 5px 0;
	transition: all 0.3s;
}
.timeline-block p {
	font-size: 0.8rem;
	margin: 5px 0;
}
.timeline-block time {
	font-size: 0.8rem;
	color: var(--dark-primary-color);
}
.timeline-block::before {
	position: absolute;
	content: '';
	width: 15px;
	height: 15px;
	background-color: white;
	border: 3px solid var(--tertiary-color);
	border-radius: 50%;
	left: -10px;
	top: -5px;
}
.timeline-block::after {
	position: absolute;
	content: '';
	width: 3px;
	height: 100%;
	background-color: var(--tertiary-color);
	left: -1px;
	top: 13px;
}
.timeline-block:hover h1 {
	color: var(--tertiary-color);
}
.timeline-block:hover::before {
	animation: circle 1.2s infinite;
}

/* Programming skills section */
.pg-list, .tool-list, .favor-list {
	padding: 0;
	list-style: none;
}
.pg-list > li {	
	margin: 1rem 0;
	display: flex;
	align-items: center;
}
.sb-skeleton {
	position: relative;
	flex: 1 0 auto;
	height: 2px;
	background-color: var(--color-gray-dark-3);
}
.pg-list > li > span {
	flex: 0 0 100px;
}
.sb-skeleton > .skillbar {
	position: absolute;
	left: 0;
	top: -1px;
	width: var(--pgbar-length);
	height: 4px;
	background-color: var(--secondary-color);
}
.tool-list {
	list-style: none;
	display: flex;
	justify-content: space-between;
}
.tool-list > li {
	position: relative;
	text-align: center;
	flex: 0 0 25%;
}
.tool-list > li > svg {
	position: relative;
	fill: transparent;
	width: 95%;
	transform: rotate(-90deg);
}
.tool-list > li > svg > circle {
	stroke-width: 1px;
	stroke: #cdcdcd;
}
.tool-list > li > svg > circle.cbar {
	stroke-width: 3px;
	stroke: var(--gray-color);
	stroke-linecap: round;
	stroke-dashoffset: 0;
	stroke-dasharray: calc(var(--MATH-PI) * 45 * 2);
	transition: all 0.8s;
	transition-timing-function: cubic-bezier(.64,.51,.16,.86);
}
.tool-list > li:hover > svg > circle.cbar {
	stroke-width: 4px;
		stroke: var(--secondary-color);
	stroke-dashoffset: calc(var(--MATH-PI) * 45 * 2 * (1 - var(--percent)));
}
.tool-list > li > .tl-name,
.tool-list > li > .tl-exp {
	position: absolute;
	left: 50%;
	color: var(--color-gray-dark-1);
}
.tool-list > li > .tl-name {
	top: 50%;
	font-size: 1.2rem;
	transform: translate(-50%, -50%);
}
.tool-list > li > .tl-exp {	
	top: calc(50% + 1.4rem);
	font-size: 1rem;
	transform: translate(-50%, -50%);
}
/* Interests Section */
.outer-frame {
    border: 2px solid var(--secondary-color);
    border-radius:20px;
    padding: 1rem;
}

.favor-list {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem; /* spacing between items */
    justify-content: center;
}

.favor-list > li {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 140px;          /* fixed width for clean grid */
    text-align: center;
    padding: 1rem;
    border-radius: 8px;
    transition: all 0.3s;
}

.favor-list > li img {
    width: 60px;
    height: 60px;
    object-fit: contain;
    margin-bottom: 0.5rem;
}

.favor-list > li:hover {
    transform: scale(1.1);
    color: var(--primary-color);
}

.favor-list > li > span {
    font-size: 0.9rem;
    letter-spacing: 1px;
}

/* Responsive */
@media (max-width: 768px) {
    .favor-list > li {
        width: 120px;
    }
}

@media (max-width: 480px) {
    .favor-list > li {
        width: 100%;
    }
}


@keyframes circle {
  0% {
    box-shadow: 0 0 0 0px rgba(51, 52, 57, 1);
  }
  100% {
    box-shadow: 0 0 0 6px rgba(51, 52, 57, 0);
  }
}

@media (max-width: 1024px) {
	html {
		font-size: 90%;
	}
	.wrapper {
		flex-direction: column;
	}
	.intro, .detail {
		flex: 0 0 100%;
		box-shadow: none;
	}
	.intro-section {
		padding: 0 2rem;
	}
	.profile {
		margin-bottom: 1rem;
	}
	.profile::after {
		display: none;
	}
	.photo img {
		width: 100px;
		height: 100px;
	}
}

@media (max-width: 768px) {
	html {
		font-size: 80%;
	}
	.tool-list {
		flex-wrap: wrap;
	}
	.tool-list > li {
		flex: 0 0 33.33%;
	}
	.favor-list > li {
		flex: 0 0 33.3333%;
	}
}
@media (max-width: 500px) {
	html {
		font-size: 70%;
	}
}