/* ========================================
   CSS Variables
   ======================================== */
:root {
	--bg-primary: #0f172a;
	--bg-secondary: #1e293b;
	--bg-card: #1e293b;
	--text-primary: #f1f5f9;
	--text-secondary: #94a3b8;
	--text-muted: #64748b;
	--accent: #2dd4bf;
	--accent-hover: #14b8a6;
	--border: #334155;
	--font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
	--font-mono: 'Fira Code', 'Courier New', monospace;
	--radius: 8px;
	--radius-lg: 12px;
	--shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
	--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
	--transition: 0.2s ease;
}

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

html {
	scroll-behavior: smooth;
	scroll-padding-top: 80px;
}

body {
	font-family: var(--font-body);
	background-color: var(--bg-primary);
	color: var(--text-secondary);
	line-height: 1.6;
	-webkit-font-smoothing: antialiased;
}

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

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

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

ul {
	list-style: none;
}

h1, h2, h3, h4, h5, h6 {
	color: var(--text-primary);
	font-weight: 700;
	line-height: 1.2;
}

/* ========================================
   Layout
   ======================================== */
.container {
	max-width: 1100px;
	margin: 0 auto;
	padding: 0 24px;
}

section {
	padding: 100px 0;
}

.section-title {
	font-size: 2rem;
	margin-bottom: 60px;
	text-align: center;
	position: relative;
}

.section-title::after {
	content: '';
	display: block;
	width: 60px;
	height: 3px;
	background: var(--accent);
	margin: 16px auto 0;
	border-radius: 2px;
}

/* ========================================
   Navigation
   ======================================== */
#navbar {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	z-index: 1000;
	background: rgba(15, 23, 42, 0.9);
	backdrop-filter: blur(12px);
	-webkit-backdrop-filter: blur(12px);
	border-bottom: 1px solid transparent;
	transition: border-color var(--transition), box-shadow var(--transition);
}

#navbar.scrolled {
	border-bottom-color: var(--border);
	box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.nav-container {
	max-width: 1100px;
	margin: 0 auto;
	padding: 0 24px;
	display: flex;
	align-items: center;
	justify-content: space-between;
	height: 64px;
}

.nav-logo {
	font-size: 1.25rem;
	font-weight: 700;
	color: var(--text-primary);
	letter-spacing: -0.5px;
}

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

.nav-links {
	display: flex;
	align-items: center;
	gap: 32px;
}

.nav-links a {
	color: var(--text-secondary);
	font-size: 0.9rem;
	font-weight: 500;
	transition: color var(--transition);
}

.nav-links a:hover {
	color: var(--text-primary);
}

.nav-cta {
	background: var(--accent);
	color: var(--bg-primary) !important;
	padding: 8px 20px;
	border-radius: var(--radius);
	font-weight: 600 !important;
}

.nav-cta:hover {
	background: var(--accent-hover);
	color: var(--bg-primary) !important;
}

/* Mobile nav toggle */
.nav-toggle {
	display: none;
	flex-direction: column;
	gap: 5px;
	background: none;
	border: none;
	cursor: pointer;
	padding: 4px;
}

.nav-toggle span {
	display: block;
	width: 24px;
	height: 2px;
	background: var(--text-primary);
	border-radius: 2px;
	transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.active span:nth-child(1) {
	transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
	opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
	transform: translateY(-7px) rotate(-45deg);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
	display: inline-block;
	padding: 12px 28px;
	border-radius: var(--radius);
	font-weight: 600;
	font-size: 0.95rem;
	font-family: var(--font-body);
	text-align: center;
	transition: all var(--transition);
	cursor: pointer;
	border: none;
}

.btn-primary {
	background: var(--accent);
	color: var(--bg-primary);
}

.btn-primary:hover {
	background: var(--accent-hover);
	color: var(--bg-primary);
	transform: translateY(-1px);
	box-shadow: 0 4px 12px rgba(45, 212, 191, 0.3);
}

.btn-outline {
	background: transparent;
	color: var(--accent);
	border: 2px solid var(--accent);
}

.btn-outline:hover {
	background: var(--accent);
	color: var(--bg-primary);
	transform: translateY(-1px);
}

.btn-small {
	padding: 8px 16px;
	font-size: 0.85rem;
}

/* ========================================
   Hero
   ======================================== */
#hero {
	min-height: 100vh;
	display: flex;
	align-items: center;
	padding-top: 64px;
	background: var(--bg-primary);
	position: relative;
	overflow: hidden;
}

#hero::before {
	content: '';
	position: absolute;
	top: -50%;
	right: -20%;
	width: 600px;
	height: 600px;
	background: radial-gradient(circle, rgba(45, 212, 191, 0.08) 0%, transparent 70%);
	pointer-events: none;
}

.hero-content {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 60px;
	width: 100%;
}

.hero-text {
	flex: 1;
	max-width: 620px;
}

.hero-image {
	flex-shrink: 0;
}

.hero-image img {
	width: 280px;
	height: 280px;
	object-fit: cover;
	border-radius: 50%;
	border: 3px solid var(--accent);
	box-shadow: 0 0 40px rgba(45, 212, 191, 0.15);
}

.hero-greeting {
	color: var(--accent);
	font-family: var(--font-mono);
	font-size: 1rem;
	margin-bottom: 16px;
}

.hero-headline {
	font-size: clamp(2.5rem, 6vw, 4rem);
	font-weight: 700;
	margin-bottom: 24px;
	letter-spacing: -1px;
}

.hero-sub {
	font-size: 1.15rem;
	color: var(--text-secondary);
	max-width: 560px;
	margin-bottom: 40px;
	line-height: 1.7;
}

.hero-ctas {
	display: flex;
	gap: 16px;
	flex-wrap: wrap;
}

/* ========================================
   About
   ======================================== */
#about {
	background: var(--bg-secondary);
}

.about-grid {
	display: grid;
	grid-template-columns: 210px 1fr;
	gap: 60px;
	align-items: start;
}

.about-image img {
	width: 100%;
	height: auto;
	border-radius: var(--radius-lg);
	border: 3px solid var(--border);
}

.about-text p {
	margin-bottom: 20px;
	font-size: 1rem;
	line-height: 1.8;
}

.about-links {
	display: flex;
	gap: 24px;
	margin-top: 24px;
}

.about-links a {
	font-weight: 600;
}

/* ========================================
   Experience
   ======================================== */
#experience {
	background: var(--bg-primary);
}

.timeline {
	max-width: 700px;
	margin: 0 auto;
	position: relative;
	padding-left: 40px;
}

.timeline::before {
	content: '';
	position: absolute;
	left: 7px;
	top: 8px;
	bottom: 8px;
	width: 2px;
	background: var(--border);
}

.timeline-item {
	position: relative;
	margin-bottom: 48px;
}

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

.timeline-marker {
	position: absolute;
	left: -40px;
	top: 8px;
	width: 16px;
	height: 16px;
	border-radius: 50%;
	background: var(--bg-primary);
	border: 3px solid var(--accent);
}

.timeline-date {
	display: inline-block;
	font-family: var(--font-mono);
	font-size: 0.85rem;
	color: var(--accent);
	margin-bottom: 8px;
}

.timeline-content h3 {
	font-size: 1.15rem;
	margin-bottom: 12px;
}

.timeline-content ul {
	list-style: none;
	padding: 0;
}

.timeline-content li {
	position: relative;
	padding-left: 20px;
	margin-bottom: 8px;
	font-size: 0.95rem;
	color: var(--text-secondary);
}

.timeline-content li::before {
	content: '';
	position: absolute;
	left: 0;
	top: 10px;
	width: 6px;
	height: 6px;
	border-radius: 50%;
	background: var(--text-muted);
}

/* ========================================
   Skills
   ======================================== */
#skills {
	background: var(--bg-secondary);
}

.skills-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
	gap: 40px;
}

.skill-group-title {
	font-size: 0.95rem;
	color: var(--accent);
	margin-bottom: 16px;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 1px;
}

.skill-tags {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
}

.skill-tag {
	display: inline-block;
	padding: 6px 14px;
	background: var(--bg-primary);
	border: 1px solid var(--border);
	border-radius: 20px;
	font-size: 0.85rem;
	color: var(--text-secondary);
	transition: border-color var(--transition), color var(--transition);
}

.skill-tag:hover {
	border-color: var(--accent);
	color: var(--text-primary);
}

/* ========================================
   Portfolio
   ======================================== */
#portfolio {
	background: var(--bg-primary);
}

.portfolio-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
	gap: 28px;
}

.project-card {
	background: var(--bg-card);
	border: 1px solid var(--border);
	border-radius: var(--radius-lg);
	overflow: hidden;
	transition: transform var(--transition), box-shadow var(--transition);
}

.project-card:hover {
	transform: translateY(-4px);
	box-shadow: var(--shadow-lg);
}

.project-thumb {
	width: 100%;
	height: 200px;
	object-fit: cover;
}

.project-info {
	padding: 24px;
}

.project-title {
	font-size: 1.2rem;
	margin-bottom: 12px;
}

.project-desc {
	font-size: 0.9rem;
	line-height: 1.7;
	margin-bottom: 16px;
	color: var(--text-secondary);
}

.project-tech {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	margin-bottom: 20px;
}

.project-tech span {
	font-family: var(--font-mono);
	font-size: 0.75rem;
	padding: 4px 10px;
	background: rgba(45, 212, 191, 0.1);
	color: var(--accent);
	border-radius: 4px;
}

.project-links {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
}

/* ========================================
   Contact
   ======================================== */
#contact {
	background: var(--bg-secondary);
}

.contact-grid {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 60px;
	align-items: start;
}

.contact-text p {
	margin-bottom: 16px;
	font-size: 1rem;
	line-height: 1.8;
}

.contact-info {
	display: flex;
	flex-direction: column;
	gap: 8px;
	margin-top: 24px;
}

.contact-info a {
	font-weight: 500;
}

#contact-form {
	display: flex;
	flex-direction: column;
}

#contact-form label {
	font-size: 0.9rem;
	font-weight: 500;
	color: var(--text-primary);
	margin-bottom: 6px;
	margin-top: 16px;
}

#contact-form label:first-child {
	margin-top: 0;
}

.input-field {
	width: 100%;
	padding: 12px 16px;
	background: var(--bg-primary);
	border: 1px solid var(--border);
	border-radius: var(--radius);
	color: var(--text-primary);
	font-family: var(--font-body);
	font-size: 0.95rem;
	transition: border-color var(--transition);
}

.input-field:focus {
	outline: none;
	border-color: var(--accent);
}

textarea.input-field {
	resize: vertical;
	min-height: 120px;
}

#submit-btn {
	margin-top: 24px;
	padding: 14px 28px;
	background: var(--accent);
	color: var(--bg-primary);
	border: none;
	border-radius: var(--radius);
	font-family: var(--font-body);
	font-size: 1rem;
	font-weight: 600;
	cursor: pointer;
	transition: background var(--transition), transform var(--transition);
}

#submit-btn:hover {
	background: var(--accent-hover);
	transform: translateY(-1px);
}

/* ========================================
   Footer
   ======================================== */
footer {
	background: var(--bg-primary);
	border-top: 1px solid var(--border);
	padding: 32px 0;
}

.footer-content {
	text-align: center;
	font-size: 0.85rem;
	color: var(--text-muted);
}

/* ========================================
   Responsive
   ======================================== */
@media screen and (max-width: 768px) {
	section {
		padding: 72px 0;
	}

	.section-title {
		font-size: 1.75rem;
		margin-bottom: 40px;
	}

	/* Mobile nav */
	.nav-toggle {
		display: flex;
	}

	.nav-links {
		position: fixed;
		top: 64px;
		left: 0;
		right: 0;
		background: var(--bg-secondary);
		flex-direction: column;
		padding: 24px;
		gap: 20px;
		border-bottom: 1px solid var(--border);
		transform: translateY(-100%);
		opacity: 0;
		pointer-events: none;
		transition: transform 0.3s ease, opacity 0.3s ease;
	}

	.nav-links.open {
		transform: translateY(0);
		opacity: 1;
		pointer-events: auto;
	}

	.nav-links a {
		font-size: 1rem;
	}

	/* About */
	.about-grid {
		grid-template-columns: 1fr;
		gap: 32px;
	}

	/* Contact */
	.contact-grid {
		grid-template-columns: 1fr;
		gap: 40px;
	}

	/* Portfolio */
	.portfolio-grid {
		grid-template-columns: 1fr;
	}

	/* Hero */
	.hero-content {
		flex-direction: column-reverse;
		text-align: center;
	}

	.hero-image img {
		width: 200px;
		height: 200px;
		margin: 0 auto;
	}

	.hero-ctas {
		justify-content: center;
	}

	.hero-headline {
		font-size: 2.25rem;
	}

	.hero-sub {
		font-size: 1rem;
	}
}

@media screen and (max-width: 480px) {
	.container {
		padding: 0 16px;
	}

	.hero-ctas {
		flex-direction: column;
	}

	.hero-ctas .btn {
		text-align: center;
	}

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