/* ===================================
   CSS Variables
   =================================== */
:root {
	/* Colors */
	--color-primary: #49bf9d;
	--color-primary-dark: #3a9d7f;
	--color-primary-light: #5cd4b0;

	--color-text-primary: #333333;
	--color-text-secondary: #666666;
	--color-text-light: #ffffff;

	--color-bg-primary: #ffffff;
	--color-bg-secondary: #f8f9fa;
	--color-bg-dark: #2c3e50;
	--color-bg-header: #1a252f;

	--color-border: #e0e0e0;
	--color-shadow: rgba(0, 0, 0, 0.1);

	/* Typography */
	--font-family-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
	--font-family-heading: 'Georgia', serif;

	--font-size-base: 16px;
	--font-size-small: 0.875rem;
	--font-size-large: 1.125rem;
	--font-size-h1: 3rem;
	--font-size-h2: 2.25rem;
	--font-size-h3: 1.75rem;
	--font-size-h4: 1.5rem;

	--font-weight-normal: 400;
	--font-weight-medium: 500;
	--font-weight-bold: 700;

	--line-height-base: 1.6;
	--line-height-heading: 1.2;

	/* Spacing */
	--spacing-xs: 0.5rem;
	--spacing-sm: 1rem;
	--spacing-md: 1.5rem;
	--spacing-lg: 2rem;
	--spacing-xl: 3rem;
	--spacing-xxl: 4rem;

	/* Layout */
	--max-width-content: 1200px;
	--max-width-text: 65ch;
	--header-width: 280px;

	/* Border Radius */
	--radius-sm: 4px;
	--radius-md: 8px;
	--radius-lg: 12px;
	--radius-full: 50%;

	/* Transitions */
	--transition-fast: 150ms ease;
	--transition-base: 250ms ease;
	--transition-slow: 350ms ease;

	/* Shadows */
	--shadow-sm: 0 1px 3px var(--color-shadow);
	--shadow-md: 0 4px 6px var(--color-shadow);
	--shadow-lg: 0 10px 20px var(--color-shadow);
}

/* ===================================
   Reset & Base Styles
   =================================== */
*, *::before, *::after {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

html {
	font-size: var(--font-size-base);
	scroll-behavior: smooth;
}

/* ===================================
   Animations & Keyframes
   =================================== */
@keyframes fadeIn {
	from {
		opacity: 0;
		transform: translateY(20px);
	}
	to {
		opacity: 1;
		transform: translateY(0);
	}
}

@keyframes slideInLeft {
	from {
		opacity: 0;
		transform: translateX(-30px);
	}
	to {
		opacity: 1;
		transform: translateX(0);
	}
}

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

@keyframes scaleIn {
	from {
		opacity: 0;
		transform: scale(0.95);
	}
	to {
		opacity: 1;
		transform: scale(1);
	}
}

@keyframes pulse {
	0%, 100% {
		transform: scale(1);
	}
	50% {
		transform: scale(1.05);
	}
}

body {
	font-family: var(--font-family-primary);
	font-weight: var(--font-weight-normal);
	line-height: var(--line-height-base);
	color: var(--color-text-primary);
	background-color: var(--color-bg-primary);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

img {
	max-width: 100%;
	height: auto;
	display: block;
}

a {
	color: var(--color-primary);
	text-decoration: none;
	transition: color var(--transition-fast);
}

a:hover,
a:focus {
	color: var(--color-primary-dark);
}

/* ===================================
   Typography
   =================================== */
h1, h2, h3, h4, h5, h6 {
	font-family: var(--font-family-heading);
	font-weight: var(--font-weight-bold);
	line-height: var(--line-height-heading);
	margin-bottom: var(--spacing-md);
}

h1 {
	font-size: var(--font-size-h1);
}

h2 {
	font-size: var(--font-size-h2);
}

h3 {
	font-size: var(--font-size-h3);
}

h4 {
	font-size: var(--font-size-h4);
}

p {
	margin-bottom: var(--spacing-md);
}

strong {
	font-weight: var(--font-weight-bold);
}

/* ===================================
   Layout
   =================================== */
body {
	min-height: 100vh;
	padding-left: var(--header-width);
}

/* ===================================
   Header
   =================================== */
.header {
	background-color: var(--color-bg-header);
	color: var(--color-text-light);
	padding: var(--spacing-xl) var(--spacing-lg);
	position: fixed;
	top: 0;
	left: 0;
	height: 100vh;
	width: var(--header-width);
	display: flex;
	flex-direction: column;
	align-items: center;
	text-align: center;
	animation: slideInLeft 0.6s ease-out;
}

.header__inner {
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: var(--spacing-md);
}

.header__avatar {
	width: 120px;
	height: 120px;
	border-radius: var(--radius-full);
	border: 4px solid var(--color-primary);
	object-fit: cover;
	animation: scaleIn 0.8s ease-out 0.2s both;
	transition: transform var(--transition-base);
}

.header__avatar:hover {
	transform: scale(1.05);
	border-color: var(--color-primary-light);
}

.header__title {
	font-size: var(--font-size-h2);
	color: var(--color-text-light);
	margin-bottom: var(--spacing-xs);
	animation: fadeIn 0.8s ease-out 0.3s both;
}

.header__subtitle {
	font-size: var(--font-size-large);
	color: rgba(255, 255, 255, 0.85);
	margin-bottom: 0;
	font-weight: var(--font-weight-medium);
	animation: fadeIn 0.8s ease-out 0.4s both;
}

/* ===================================
   Main Content
   =================================== */
.main {
	padding: var(--spacing-xxl) var(--spacing-xl);
	max-width: var(--max-width-content);
	margin: 0 auto;
	width: 100%;
	min-height: 100vh;
	animation: fadeIn 0.8s ease-out 0.3s both;
}

/* ===================================
   Section
   =================================== */
.section {
	margin-bottom: var(--spacing-xxl);
	animation: fadeIn 0.6s ease-out both;
}

.section:nth-child(1) {
	animation-delay: 0.4s;
}

.section:nth-child(2) {
	animation-delay: 0.5s;
}

.section:nth-child(3) {
	animation-delay: 0.6s;
}

.section__header {
	margin-bottom: var(--spacing-lg);
}

.section__title {
	color: var(--color-text-primary);
	border-bottom: 2px solid var(--color-primary);
	padding-bottom: var(--spacing-sm);
	margin-bottom: var(--spacing-lg);
	position: relative;
}

.section__title::after {
	content: '';
	position: absolute;
	bottom: -2px;
	left: 0;
	width: 0;
	height: 2px;
	background-color: var(--color-primary-light);
	transition: width var(--transition-slow);
}

.section:hover .section__title::after {
	width: 100px;
}

.section__content {
	max-width: var(--max-width-text);
}

/* ===================================
   Buttons
   =================================== */
.button {
	display: inline-block;
	padding: var(--spacing-sm) var(--spacing-lg);
	background-color: var(--color-primary);
	color: var(--color-text-light);
	border: 2px solid var(--color-primary);
	border-radius: var(--radius-sm);
	font-weight: var(--font-weight-medium);
	text-align: center;
	cursor: pointer;
	transition: all var(--transition-base);
}

.button:hover,
.button:focus {
	background-color: var(--color-primary-dark);
	border-color: var(--color-primary-dark);
	color: var(--color-text-light);
	transform: translateY(-2px);
	box-shadow: var(--shadow-md);
}

.button--primary {
	background-color: var(--color-primary);
	border-color: var(--color-primary);
}

.button--small {
	padding: var(--spacing-xs) var(--spacing-md);
	font-size: var(--font-size-small);
}

/* ===================================
   Projects Grid
   =================================== */
.projects {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
	gap: var(--spacing-lg);
	margin-top: var(--spacing-lg);
}

/* ===================================
   Project Card
   =================================== */
.project-card {
	background-color: var(--color-bg-primary);
	border: 1px solid var(--color-border);
	border-radius: var(--radius-md);
	overflow: hidden;
	transition: all var(--transition-base);
	display: flex;
	flex-direction: column;
	animation: scaleIn 0.5s ease-out both;
}

.project-card:nth-child(1) {
	animation-delay: 0.6s;
}

.project-card:nth-child(2) {
	animation-delay: 0.7s;
}

.project-card:nth-child(3) {
	animation-delay: 0.8s;
}

.project-card:hover {
	box-shadow: var(--shadow-lg);
	transform: translateY(-8px);
	border-color: var(--color-primary);
}

.project-card__image-link {
	display: block;
	overflow: hidden;
}

.project-card__image {
	width: 100%;
	height: 200px;
	object-fit: cover;
	transition: transform var(--transition-slow);
}

.project-card:hover .project-card__image {
	transform: scale(1.05);
}

.project-card__content {
	padding: var(--spacing-lg);
	flex: 1;
	display: flex;
	flex-direction: column;
}

.project-card__title {
	font-size: var(--font-size-h4);
	margin-bottom: var(--spacing-sm);
	color: var(--color-text-primary);
}

.project-card__description {
	color: var(--color-text-secondary);
	margin-bottom: var(--spacing-md);
	flex: 1;
}

/* ===================================
   Certifications Grid
   =================================== */
.certifications {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
	gap: var(--spacing-md);
	margin-top: var(--spacing-lg);
}

/* ===================================
   Certification Card
   =================================== */
.certification-card {
	background-color: var(--color-bg-secondary);
	padding: var(--spacing-md);
	border-radius: var(--radius-md);
	border-left: 4px solid var(--color-primary);
	transition: all var(--transition-base);
	animation: slideInRight 0.5s ease-out both;
}

.certification-card:nth-child(1) {
	animation-delay: 0.7s;
}

.certification-card:nth-child(2) {
	animation-delay: 0.8s;
}

.certification-card:nth-child(3) {
	animation-delay: 0.9s;
}

.certification-card:nth-child(4) {
	animation-delay: 1s;
}

.certification-card:hover {
	background-color: var(--color-bg-primary);
	box-shadow: var(--shadow-md);
	transform: translateX(8px);
	border-left-width: 6px;
}

.certification-card__title {
	font-size: var(--font-size-large);
	margin-bottom: var(--spacing-xs);
}

.certification-card__title a {
	color: var(--color-text-primary);
	font-weight: var(--font-weight-medium);
}

.certification-card__title a:hover {
	color: var(--color-primary);
}

.certification-card__issuer {
	font-size: var(--font-size-small);
	color: var(--color-text-secondary);
	font-style: italic;
	margin-bottom: var(--spacing-xs);
}

.certification-card__date {
	font-size: var(--font-size-small);
	color: var(--color-text-secondary);
	display: block;
}

/* ===================================
   Social Navigation
   =================================== */
.social-nav {
	display: flex;
	gap: var(--spacing-sm);
	justify-content: center;
	align-items: center;
	margin-top: var(--spacing-lg);
	animation: fadeIn 0.8s ease-out 0.5s both;
}

.social-nav__link {
	width: 48px;
	height: 48px;
	display: flex;
	align-items: center;
	justify-content: center;
	border-radius: var(--radius-full);
	background-color: rgba(255, 255, 255, 0.1);
	transition: all var(--transition-base);
	position: relative;
}

.social-nav__link::before {
	content: '';
	position: absolute;
	inset: 0;
	border-radius: var(--radius-full);
	opacity: 0;
	transition: opacity var(--transition-base);
}

.social-nav__link--linkedin {
	color: #ffffff;
}

.social-nav__link--linkedin::before {
	background: linear-gradient(135deg, #0077b5 0%, #00a0dc 100%);
}

.social-nav__link--linkedin:hover,
.social-nav__link--linkedin:focus {
	color: #ffffff;
}

.social-nav__link--linkedin:hover::before,
.social-nav__link--linkedin:focus::before {
	opacity: 1;
}

.social-nav__link--github {
	color: #ffffff;
}

.social-nav__link--github::before {
	background: linear-gradient(135deg, #333333 0%, #24292e 100%);
}

.social-nav__link--github:hover,
.social-nav__link--github:focus {
	color: #ffffff;
}

.social-nav__link--github:hover::before,
.social-nav__link--github:focus::before {
	opacity: 1;
}

.social-nav__link--email {
	color: #ffffff;
}

.social-nav__link--email::before {
	background: linear-gradient(135deg, #ea4335 0%, #d93025 100%);
}

.social-nav__link--email:hover,
.social-nav__link--email:focus {
	color: #ffffff;
}

.social-nav__link--email:hover::before,
.social-nav__link--email:focus::before {
	opacity: 1;
}

.social-nav__link:hover,
.social-nav__link:focus {
	transform: translateY(-4px) scale(1.1);
	box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.social-nav__icon {
	width: 22px;
	height: 22px;
	fill: currentColor;
	position: relative;
	z-index: 1;
}

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

/* Tablet */
@media (max-width: 1024px) {
	:root {
		--header-width: 240px;
		--font-size-h1: 2.5rem;
		--font-size-h2: 2rem;
	}

	.main {
		padding: var(--spacing-xl) var(--spacing-lg);
	}

	.header__title {
		font-size: var(--font-size-h3);
	}
}

/* Mobile */
@media (max-width: 768px) {
	body {
		padding-left: 0;
	}

	.header {
		position: static;
		width: 100%;
		height: auto;
		padding: var(--spacing-lg);
		animation: fadeIn 0.6s ease-out;
	}

	.header__avatar {
		width: 100px;
		height: 100px;
	}

	.main {
		padding: var(--spacing-lg) var(--spacing-md);
	}

	.projects {
		grid-template-columns: 1fr;
	}

	.certifications {
		grid-template-columns: 1fr;
	}

	:root {
		--font-size-h1: 2rem;
		--font-size-h2: 1.75rem;
		--font-size-h3: 1.5rem;
		--spacing-xxl: 2rem;
		--spacing-xl: 1.5rem;
	}

	.social-nav {
		gap: var(--spacing-md);
	}

	.social-nav__link {
		width: 52px;
		height: 52px;
	}
}

/* Small Mobile */
@media (max-width: 480px) {
	:root {
		--font-size-base: 14px;
		--spacing-lg: 1rem;
		--spacing-md: 0.75rem;
	}

	.header {
		padding: var(--spacing-md);
	}

	.main {
		padding: var(--spacing-md);
	}

	.project-card__content,
	.certification-card {
		padding: var(--spacing-md);
	}
}

/* Print Styles */
@media print {
	.header,
	.footer,
	.button {
		display: none;
	}

	body {
		padding-left: 0;
	}

	.main {
		padding: 0;
	}
}