/* ==========================================
   PROFESSIONAL PROGRAMMER PORTFOLIO
   Modern, Clean, Code-Inspired Design
   ========================================== */

/* === ROOT VARIABLES === */
:root {
	/* Colors - Dark Theme with Tech Accents */
	--bg-primary: #0d1117;
	--bg-secondary: #161b22;
	--bg-tertiary: #21262d;
	--bg-elevated: #2d333b;
	
	--text-primary: #c9d1d9;
	--text-secondary: #8b949e;
	--text-muted: #6e7681;
	
	--accent-blue: #58a6ff;
	--accent-blue-hover: #79c0ff;
	--accent-green: #3fb950;
	--accent-yellow: #d29922;
	--accent-red: #f85149;
	
	--border-primary: #30363d;
	--border-secondary: #21262d;
	
	/* Typography */
	--font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
	--font-mono: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Monaco, 'Courier New', monospace;
	
	/* Spacing */
	--spacing-xs: 0.25rem;
	--spacing-sm: 0.5rem;
	--spacing-md: 1rem;
	--spacing-lg: 1.5rem;
	--spacing-xl: 2rem;
	--spacing-2xl: 3rem;
	--spacing-3xl: 4rem;
	
	/* Border Radius */
	--radius-sm: 6px;
	--radius-md: 12px;
	--radius-lg: 16px;
	
	/* Transitions */
	--transition-fast: 150ms ease;
	--transition-normal: 250ms ease;
	--transition-slow: 350ms ease;
	
	/* Layout */
	--container-max: 1280px;
	--content-max: 65ch;
	--nav-height: 64px;
}

/* === RESET & BASE === */
*, *::before, *::after {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

html {
	font-size: 16px;
	scroll-behavior: smooth;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

body {
	font-family: var(--font-primary);
	background-color: var(--bg-primary);
	color: var(--text-primary);
	line-height: 1.6;
	overflow-x: hidden;
	min-height: 100vh;
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
	font-weight: 600;
	line-height: 1.25;
	color: var(--text-primary);
}

h1 {
	font-size: clamp(2.5rem, 5vw, 4rem);
	font-weight: 700;
	margin-bottom: var(--spacing-lg);
}

h2 {
	font-size: clamp(2rem, 4vw, 3rem);
	margin-bottom: var(--spacing-md);
}

h3 {
	font-size: clamp(1.5rem, 3vw, 2rem);
	margin-bottom: var(--spacing-md);
}

h4 {
	font-size: 1.25rem;
	margin-bottom: var(--spacing-sm);
}

p {
	margin-bottom: var(--spacing-md);
	color: var(--text-secondary);
	max-width: var(--content-max);
}

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

a:hover {
	color: var(--accent-blue-hover);
}

code {
	font-family: var(--font-mono);
	font-size: 0.875em;
	background: var(--bg-tertiary);
	padding: 0.2em 0.4em;
	border-radius: var(--radius-sm);
	border: 1px solid var(--border-primary);
}

strong {
	font-weight: 600;
	color: var(--text-primary);
}

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

/* === LAYOUT === */
.container {
	max-width: var(--container-max);
	margin: 0 auto;
	padding: 0 var(--spacing-xl);
}

.section {
	padding: var(--spacing-3xl) 0;
}

/* === HEADER & NAVIGATION === */
.site-header {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	height: var(--nav-height);
	background: rgba(13, 17, 23, 0.8);
	backdrop-filter: blur(12px);
	-webkit-backdrop-filter: blur(12px);
	border-bottom: 1px solid var(--border-primary);
	z-index: 1000;
	transition: background var(--transition-normal), box-shadow var(--transition-normal);
}

.site-header.scrolled {
	background: rgba(13, 17, 23, 0.95);
	box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.nav-wrapper {
	display: flex;
	align-items: center;
	justify-content: space-between;
	height: 100%;
	max-width: var(--container-max);
	margin: 0 auto;
	padding: 0 var(--spacing-xl);
}

.site-logo {
	font-family: var(--font-mono);
	font-size: 1.125rem;
	font-weight: 600;
	color: var(--text-primary);
	display: flex;
	align-items: center;
	gap: var(--spacing-xs);
	transition: color var(--transition-fast);
}

.site-logo:hover {
	color: var(--accent-blue);
}

.site-logo::before {
	content: '~/';
	color: var(--accent-blue);
}

.nav-links {
	display: flex;
	list-style: none;
	gap: var(--spacing-xs);
	align-items: center;
}

.nav-link {
	padding: var(--spacing-sm) var(--spacing-md);
	color: var(--text-secondary);
	font-size: 0.9375rem;
	font-weight: 500;
	border-radius: var(--radius-sm);
	transition: all var(--transition-fast);
}

.nav-link:hover {
	color: var(--text-primary);
	background: var(--bg-tertiary);
}

.nav-link.active {
	color: var(--accent-blue);
	background: rgba(88, 166, 255, 0.1);
}

/* Mobile Menu */
.mobile-toggle {
	display: none;
	flex-direction: column;
	gap: 4px;
	background: transparent;
	border: none;
	cursor: pointer;
	padding: var(--spacing-sm);
}

.mobile-toggle span {
	display: block;
	width: 24px;
	height: 2px;
	background: var(--text-primary);
	border-radius: 2px;
	transition: all var(--transition-fast);
}

/* === HERO SECTION === */
.hero {
	min-height: 100vh;
	display: flex;
	align-items: center;
	padding-top: var(--nav-height);
	position: relative;
}

.hero::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background: radial-gradient(circle at 20% 50%, rgba(88, 166, 255, 0.08) 0%, transparent 50%),
	            radial-gradient(circle at 80% 50%, rgba(63, 185, 80, 0.06) 0%, transparent 50%);
	pointer-events: none;
}

.hero-content {
	position: relative;
	z-index: 1;
}

.hero-tag {
	display: inline-flex;
	align-items: center;
	gap: var(--spacing-sm);
	padding: var(--spacing-sm) var(--spacing-md);
	background: var(--bg-secondary);
	border: 1px solid var(--border-primary);
	border-radius: 100px;
	font-size: 0.875rem;
	font-family: var(--font-mono);
	color: var(--text-secondary);
	margin-bottom: var(--spacing-lg);
}

.hero-tag::before {
	content: '●';
	color: var(--accent-green);
	animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
	0%, 100% { opacity: 1; }
	50% { opacity: 0.5; }
}

.hero-title {
	margin-bottom: var(--spacing-md);
}

.hero-title .accent {
	color: var(--accent-blue);
}

.hero-subtitle {
	font-size: clamp(1.125rem, 2vw, 1.5rem);
	color: var(--text-secondary);
	margin-bottom: var(--spacing-lg);
	font-weight: 400;
}

.hero-description {
	color: var(--text-muted);
	margin-bottom: var(--spacing-2xl);
	max-width: 600px;
}

/* === BUTTONS === */
.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: var(--spacing-sm);
	padding: var(--spacing-md) var(--spacing-xl);
	font-size: 0.9375rem;
	font-weight: 500;
	font-family: var(--font-primary);
	border-radius: var(--radius-sm);
	border: 1px solid transparent;
	cursor: pointer;
	transition: all var(--transition-normal);
	text-decoration: none;
}

.btn-primary {
	background: var(--accent-blue);
	color: #000;
	border-color: var(--accent-blue);
}

.btn-primary:hover {
	background: var(--accent-blue-hover);
	border-color: var(--accent-blue-hover);
	color: #000;
	transform: translateY(-2px);
	box-shadow: 0 4px 12px rgba(88, 166, 255, 0.3);
}

.btn-secondary {
	background: var(--bg-secondary);
	color: var(--text-primary);
	border-color: var(--border-primary);
}

.btn-secondary:hover {
	background: var(--bg-tertiary);
	border-color: var(--border-secondary);
	color: var(--text-primary);
}

.btn-group {
	display: flex;
	gap: var(--spacing-md);
	flex-wrap: wrap;
}

/* === CARDS === */
.card {
	background: var(--bg-secondary);
	border: 1px solid var(--border-primary);
	border-radius: var(--radius-md);
	padding: var(--spacing-xl);
	transition: all var(--transition-normal);
}

.card:hover {
	border-color: var(--border-secondary);
	transform: translateY(-4px);
	box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.card-title {
	font-size: 1.5rem;
	margin-bottom: var(--spacing-md);
}

.card-text {
	color: var(--text-secondary);
	margin-bottom: var(--spacing-lg);
}

/* === GRID === */
.grid {
	display: grid;
	gap: var(--spacing-xl);
}

.grid-2 {
	grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
	grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* === PROJECT CARDS === */
.project-card {
	background: var(--bg-secondary);
	border: 1px solid var(--border-primary);
	border-radius: var(--radius-md);
	overflow: hidden;
	transition: all var(--transition-normal);
	display: flex;
	flex-direction: column;
}

.project-card:hover {
	border-color: var(--accent-blue);
	transform: translateY(-4px);
	box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

/* Clickable project card styling */
a.project-card-link {
	cursor: pointer;
}

a.project-card-link:hover .project-title {
	color: var(--accent-blue);
}

a.project-card-link:hover .project-image {
	transform: scale(1.05);
}

.project-image {
	width: 100%;
	height: 220px;
	object-fit: cover;
	background: var(--bg-tertiary);
	border-bottom: 1px solid var(--border-primary);
	transition: transform var(--transition-normal);
}

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

.project-header {
	margin-bottom: var(--spacing-md);
}

.project-title {
	font-size: 1.375rem;
	margin-bottom: var(--spacing-sm);
}

.project-meta {
	display: flex;
	flex-wrap: wrap;
	gap: var(--spacing-md);
	font-size: 0.875rem;
	color: var(--text-muted);
	margin-bottom: var(--spacing-md);
}

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

.project-tags {
	display: flex;
	flex-wrap: wrap;
	gap: var(--spacing-sm);
	margin-bottom: var(--spacing-lg);
	list-style: none;
}

.tag {
	padding: var(--spacing-xs) var(--spacing-md);
	background: var(--bg-tertiary);
	border: 1px solid var(--border-primary);
	border-radius: var(--radius-sm);
	font-size: 0.8125rem;
	font-family: var(--font-mono);
	color: var(--text-secondary);
}

.project-footer {
	display: flex;
	gap: var(--spacing-sm);
	padding-top: var(--spacing-lg);
	border-top: 1px solid var(--border-primary);
}

.project-link {
	flex: 1;
	padding: var(--spacing-sm) var(--spacing-md);
	background: var(--bg-tertiary);
	border: 1px solid var(--border-primary);
	border-radius: var(--radius-sm);
	font-size: 0.875rem;
	color: var(--text-secondary);
	text-align: center;
	transition: all var(--transition-fast);
}

.project-link:hover {
	background: var(--bg-elevated);
	border-color: var(--accent-blue);
	color: var(--accent-blue);
}

/* === BADGES === */
.badge {
	display: inline-flex;
	align-items: center;
	padding: var(--spacing-xs) var(--spacing-sm);
	background: rgba(88, 166, 255, 0.1);
	border: 1px solid rgba(88, 166, 255, 0.3);
	border-radius: var(--radius-sm);
	font-size: 0.75rem;
	font-weight: 600;
	color: var(--accent-blue);
	text-transform: uppercase;
	letter-spacing: 0.5px;
}

.badge-success {
	background: rgba(63, 185, 80, 0.1);
	border-color: rgba(63, 185, 80, 0.3);
	color: var(--accent-green);
}

/* === SECTION HEADER === */
.section-header {
	margin-bottom: var(--spacing-2xl);
}

.section-title {
	font-size: clamp(2rem, 4vw, 2.5rem);
	margin-bottom: var(--spacing-md);
	position: relative;
	display: inline-block;
}

.section-title::before {
	content: '//';
	color: var(--accent-blue);
	font-family: var(--font-mono);
	margin-right: var(--spacing-sm);
}

.section-subtitle {
	font-size: 1.125rem;
	color: var(--text-muted);
	font-weight: 400;
}

/* === TIMELINE === */
.timeline {
	position: relative;
	padding-left: var(--spacing-2xl);
}

.timeline::before {
	content: '';
	position: absolute;
	left: 0;
	top: 0;
	bottom: 0;
	width: 2px;
	background: var(--border-primary);
}

.timeline-item {
	position: relative;
	margin-bottom: var(--spacing-2xl);
}

.timeline-item:last-child {
	margin-bottom: 0;
}

.timeline-item::before {
	content: '';
	position: absolute;
	left: calc(-1 * var(--spacing-2xl) - 5px);
	top: 6px;
	width: 12px;
	height: 12px;
	background: var(--accent-blue);
	border: 2px solid var(--bg-primary);
	border-radius: 50%;
}

.timeline-date {
	display: inline-block;
	padding: var(--spacing-xs) var(--spacing-md);
	background: var(--bg-tertiary);
	border: 1px solid var(--border-primary);
	border-radius: var(--radius-sm);
	font-size: 0.8125rem;
	font-family: var(--font-mono);
	color: var(--accent-blue);
	margin-bottom: var(--spacing-md);
}

.timeline-content {
	background: var(--bg-secondary);
	border: 1px solid var(--border-primary);
	border-radius: var(--radius-md);
	padding: var(--spacing-lg);
}

.timeline-title {
	font-size: 1.125rem;
	margin-bottom: var(--spacing-sm);
}

.timeline-text {
	color: var(--text-secondary);
	margin-bottom: 0;
}

/* === STATS === */
.stats-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
	gap: var(--spacing-lg);
}

.stat-card {
	background: var(--bg-secondary);
	border: 1px solid var(--border-primary);
	border-radius: var(--radius-md);
	padding: var(--spacing-xl);
	text-align: center;
}

.stat-value {
	font-size: 3rem;
	font-weight: 700;
	font-family: var(--font-mono);
	color: var(--accent-blue);
	line-height: 1;
	margin-bottom: var(--spacing-sm);
}

.stat-label {
	font-size: 0.875rem;
	color: var(--text-muted);
	text-transform: uppercase;
	letter-spacing: 1px;
}

/* === CONTACT === */
.contact-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
	gap: var(--spacing-lg);
}

.contact-card {
	background: var(--bg-secondary);
	border: 1px solid var(--border-primary);
	border-radius: var(--radius-md);
	padding: var(--spacing-2xl);
	transition: all var(--transition-normal);
	display: flex;
	flex-direction: column;
	gap: var(--spacing-md);
}

.contact-card:hover {
	border-color: var(--accent-blue);
	transform: translateY(-4px);
	box-shadow: 0 8px 24px rgba(88, 166, 255, 0.15);
}

.contact-icon {
	width: 56px;
	height: 56px;
	display: flex;
	align-items: center;
	justify-content: center;
	background: linear-gradient(135deg, var(--bg-tertiary) 0%, var(--bg-elevated) 100%);
	border: 1px solid var(--border-primary);
	border-radius: var(--radius-md);
	font-size: 1.75rem;
	flex-shrink: 0;
}

.contact-label {
	font-size: 0.875rem;
	color: var(--text-muted);
	text-transform: uppercase;
	letter-spacing: 1px;
	font-weight: 600;
}

.contact-value {
	font-size: 1.125rem;
	color: var(--text-primary);
	font-weight: 500;
	overflow: hidden;
	text-overflow: ellipsis;
	white-space: nowrap;
	max-width: 100%;
}

/* === CONTACT FORM === */
.contact-form-container {
	max-width: 800px;
	margin: 0 auto;
}

.contact-form-header {
	text-align: center;
	margin-bottom: var(--spacing-xl);
}

.contact-form-title {
	margin-bottom: var(--spacing-md);
}

.contact-form-description {
	color: var(--text-secondary);
	margin-bottom: 0;
	text-align: center;
	margin-left: 10%;
	margin-right: 10%;
}

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

.form-label {
	display: block;
	margin-bottom: var(--spacing-xs);
	color: var(--text-primary);
	font-weight: 600;
}

.form-required {
	color: var(--accent-red);
}

.form-input,
.form-textarea {
	width: 100%;
	padding: 12px 16px;
	background: var(--bg-tertiary);
	border: 2px solid var(--border-primary);
	border-radius: var(--radius-sm);
	color: var(--text-primary);
	box-sizing: border-box;
	font-family: inherit;
	font-size: 1rem;
	transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus {
	outline: none;
	border-color: var(--accent-blue);
	box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-textarea {
	resize: vertical;
	min-height: 150px;
}

.error-message {
	display: block;
	color: var(--accent-red);
	font-size: 0.875rem;
	margin-top: var(--spacing-xs);
	min-height: 1.25rem;
}

.form-message {
	padding: var(--spacing-md);
	border-radius: var(--radius-sm);
	margin-bottom: var(--spacing-md);
	font-weight: 600;
	display: none;
}

.form-message-success {
	background: rgba(52, 211, 153, 0.1);
	border: 2px solid var(--accent-green);
	color: var(--accent-green);
}

.form-message-error {
	background: rgba(239, 68, 68, 0.1);
	border: 2px solid var(--accent-red);
	color: var(--accent-red);
}

.form-submit-wrapper {
	text-align: center;
}

.form-note {
	text-align: center;
	margin-top: var(--spacing-md);
	font-size: 0.875rem;
	color: var(--text-secondary);
	margin-bottom: 0;
}

.btn-primary:disabled {
	opacity: 0.6;
	cursor: not-allowed;
	transform: none;
}

/* === FOOTER === */
.site-footer {
	background: var(--bg-secondary);
	border-top: 1px solid var(--border-primary);
	padding: var(--spacing-2xl) 0;
	margin-top: var(--spacing-3xl);
}

.footer-content {
	display: flex;
	justify-content: space-between;
	align-items: center;
	flex-wrap: wrap;
	gap: var(--spacing-lg);
}

.footer-nav {
	display: flex;
	gap: var(--spacing-lg);
	list-style: none;
}

.footer-link {
	color: var(--text-muted);
	font-size: 0.875rem;
	transition: color var(--transition-fast);
}

.footer-link:hover {
	color: var(--accent-blue);
}

.footer-text {
	color: var(--text-muted);
	font-size: 0.875rem;
}

/* === UTILITIES === */
.text-center {
	text-align: center;
}

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }

/* === RESPONSIVE === */
@media (max-width: 768px) {
	:root {
		--nav-height: 56px;
		--spacing-xl: 1.5rem;
		--spacing-2xl: 2rem;
		--spacing-3xl: 2.5rem;
	}
	
	.mobile-toggle {
		display: flex;
	}
	
	.nav-links {
		position: fixed;
		top: var(--nav-height);
		left: 0;
		right: 0;
		background: var(--bg-secondary);
		border-bottom: 1px solid var(--border-primary);
		flex-direction: column;
		padding: var(--spacing-md);
		gap: 0;
		transform: translateY(-100%);
		opacity: 0;
		visibility: hidden;
		transition: all var(--transition-normal);
	}
	
	.nav-links.active {
		transform: translateY(0);
		opacity: 1;
		visibility: visible;
	}
	
	.nav-link {
		width: 100%;
		text-align: left;
	}
	
	.hero {
		min-height: calc(100vh - var(--nav-height));
	}
	
	.btn-group {
		flex-direction: column;
		width: 100%;
	}
	
	.btn {
		width: 100%;
	}
	
	.grid-2,
	.grid-3 {
		grid-template-columns: 1fr;
	}
	
	.footer-content {
		flex-direction: column;
		text-align: center;
	}
}

@media (max-width: 480px) {
	.container {
		padding: 0 var(--spacing-md);
	}
	
	.nav-wrapper {
		padding: 0 var(--spacing-md);
	}
}

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

.fade-in {
	animation: fadeIn 0.6s ease-out;
}

/* === SCROLLBAR === */
::-webkit-scrollbar {
	width: 12px;
}

::-webkit-scrollbar-track {
	background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
	background: var(--bg-tertiary);
	border-radius: 6px;
	border: 3px solid var(--bg-primary);
}

::-webkit-scrollbar-thumb:hover {
	background: var(--bg-elevated);
}

/* === SELECTION === */
::selection {
	background: rgba(88, 166, 255, 0.3);
	color: var(--text-primary);
}

::-moz-selection {
	background: rgba(88, 166, 255, 0.3);
	color: var(--text-primary);
}

/* === FOCUS === */
:focus-visible {
	outline: 2px solid var(--accent-blue);
	outline-offset: 2px;
	border-radius: var(--radius-sm);
}

/* ========================================
   PROJECT DETAIL PAGE STYLES
   ======================================== */

.content-text {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.0625rem;
}

.content-text p {
    margin-bottom: var(--spacing-lg);
}

.content-text p:last-child {
    margin-bottom: 0;
}

.content-text ul,
.content-text ol {
    margin: var(--spacing-lg) 0;
    padding-left: var(--spacing-xl);
}

.content-text li {
    margin-bottom: var(--spacing-sm);
    color: var(--text-secondary);
}

.content-text strong {
    color: var(--text-primary);
    font-weight: 600;
}

.content-text code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.9em;
    color: var(--accent-blue);
}

/* Code block styles for project detail page */
pre {
    background: var(--bg-primary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    overflow-x: auto;
    margin: var(--spacing-lg) 0;
}

pre code {
    background: none;
    padding: 0;
    border-radius: 0;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-primary);
}

/* Badge variants */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    font-family: var(--font-mono);
}

.badge-success {
    background: rgba(63, 185, 80, 0.15);
    color: var(--accent-green);
    border: 1px solid var(--accent-green);
}