/* Core variables */
:root {
	--bg: #0f172a;
	--panel: #111827;
	--accent: #60a5fa;
	--accent-2: #a78bfa;
	--text: #e5e7eb;
	--muted: #9ca3af;
	--border: #1f2937;
	--card: #0b1220;
	--success: #22c55e;
	--error: #ef4444;
	--shadow: 0 15px 60px rgba(0, 0, 0, 0.35);
	--radius-lg: 20px;
	--radius-md: 14px;
	--radius-sm: 10px;
}

* {
	box-sizing: border-box;
}

body {
	margin: 0;
	font-family: 'Space Grotesk', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
	background: radial-gradient(circle at 20% 20%, rgba(96, 165, 250, 0.1), transparent 25%),
				radial-gradient(circle at 80% 0%, rgba(167, 139, 250, 0.08), transparent 25%),
				var(--bg);
	color: var(--text);
	line-height: 1.6;
	-webkit-font-smoothing: antialiased;
}

img {
	max-width: 100%;
	display: block;
	border-radius: var(--radius-md);
}

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

p {
	margin: 0 0 1rem;
	color: var(--muted);
}

h1, h2, h3 {
	margin: 0 0 0.6rem;
	color: var(--text);
	letter-spacing: -0.02em;
}

ul { padding: 0; margin: 0; list-style: none; }

.container {
	width: min(1100px, 92vw);
	margin: 0 auto;
}

.section {
	padding: 96px 0;
}

.section-header {
	text-align: center;
	margin-bottom: 48px;
}

.section-lede {
	max-width: 640px;
	margin: 0.5rem auto 0;
}

.eyebrow {
	text-transform: uppercase;
	letter-spacing: 0.22em;
	font-size: 0.8rem;
	color: var(--accent);
	margin-bottom: 0.4rem;
}

/* Navbar */
.site-header {
	position: sticky;
	top: 0;
	z-index: 10;
	background: rgba(15, 23, 42, 0.9);
	backdrop-filter: blur(10px);
	border-bottom: 1px solid var(--border);
}

.nav-container {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 18px 0;
	gap: 16px;
}

.logo {
	display: inline-flex;
	align-items: center;
	gap: 10px;
	font-weight: 700;
}

.logo-mark {
	width: 40px;
	height: 40px;
	display: grid;
	place-items: center;
	background: #111827;
	border-radius: 12px;
	overflow: hidden;
}

.logo-mark img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
}

.logo-text {
	font-size: 1rem;
	color: var(--text);
}

.nav {
	display: flex;
}

.nav-links {
	display: flex;
	gap: 18px;
	align-items: center;
}

.nav-link {
	padding: 10px 12px;
	border-radius: 12px;
	color: var(--muted);
	transition: color 0.2s ease, background 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
	color: var(--text);
	background: rgba(96, 165, 250, 0.1);
}

.nav-toggle {
	display: none;
	flex-direction: column;
	gap: 6px;
	background: transparent;
	border: none;
	cursor: pointer;
}

.nav-toggle .bar {
	width: 26px;
	height: 3px;
	background: var(--text);
	border-radius: 999px;
	transition: transform 0.3s ease, opacity 0.3s ease;
}

/* Hero */
.hero {
	min-height: 90vh;
	display: grid;
	place-items: center;
}

.hero-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
	gap: 32px;
	align-items: center;
}

.hero-copy h1 {
	font-size: clamp(2.4rem, 4vw, 3.6rem);
}

.lede {
	max-width: 640px;
}

.cta-group {
	display: flex;
	gap: 14px;
	flex-wrap: wrap;
	margin: 24px 0;
}

.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: 12px 18px;
	border-radius: 12px;
	font-weight: 600;
	cursor: pointer;
	border: 1px solid transparent;
	transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border 0.2s ease;
}

.btn.primary {
	background: linear-gradient(135deg, var(--accent), var(--accent-2));
	color: #0b1220;
	box-shadow: 0 10px 30px rgba(96, 165, 250, 0.25);
}

.btn.ghost {
	border-color: var(--border);
	color: var(--text);
	background: transparent;
}

.btn:hover {
	transform: translateY(-2px);
}

.hero-meta {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
	gap: 12px;
	margin-top: 20px;
}

.hero-meta .meta-label {
	color: var(--muted);
	font-size: 0.85rem;
}

.hero-meta .meta-value {
	display: block;
	font-weight: 600;
	color: var(--text);
}

.profile-card {
	position: relative;
	overflow: hidden;
	border-radius: var(--radius-lg);
	box-shadow: var(--shadow);
}

.profile-card img { height: 100%; width: 100%; object-fit: cover; }

.profile-badge {
	position: absolute;
	bottom: 12px;
	left: 12px;
	padding: 10px 14px;
	background: rgba(17, 24, 39, 0.8);
	border: 1px solid var(--border);
	border-radius: 12px;
	color: var(--text);
	font-weight: 600;
}

.stats {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
	gap: 12px;
	margin-top: 16px;
}

.stat-card {
	background: var(--panel);
	border: 1px solid var(--border);
	border-radius: var(--radius-md);
	padding: 14px;
	text-align: center;
}

.stat-value { font-size: 1.5rem; font-weight: 700; }
.stat-label { color: var(--muted); font-size: 0.95rem; }

/* About */
.about-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
	gap: 28px;
	align-items: start;
}

.about-cards {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
	gap: 16px;
	margin-top: 18px;
}

.about-card {
	background: var(--panel);
	border: 1px solid var(--border);
	border-radius: var(--radius-md);
	padding: 16px;
}

.about-card ul li { color: var(--muted); margin-bottom: 6px; }

/* Skills */
.skills-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
	gap: 18px;
}

.skill-card,
.project-card,
.achievement-card,
.cp-card,
.about-card,
.timeline-content,
.contact-card,
.contact-info {
	background: var(--panel);
	border: 1px solid var(--border);
	border-radius: var(--radius-md);
	padding: 16px;
	transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.25s ease;
	will-change: transform;
}

.skill-card:hover,
.project-card:hover,
.achievement-card:hover,
.cp-card:hover,
.about-card:hover,
.timeline-content:hover,
.contact-card:hover,
.contact-info:hover {
	transform: translateY(-4px);
	border-color: rgba(96, 165, 250, 0.6);
	box-shadow: var(--shadow);
}

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

.skill-tags li {
	padding: 8px 12px;
	background: rgba(96, 165, 250, 0.12);
	border-radius: 999px;
	color: var(--text);
	border: 1px solid var(--border);
	font-size: 0.95rem;
}

/* Projects */
.project-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
	gap: 18px;
}

.project-card {
	display: grid;
	gap: 12px;
}

.tech-stack { display: flex; flex-wrap: wrap; gap: 8px; }

.tech-stack li {
	padding: 6px 10px;
	border-radius: 10px;
	background: rgba(167, 139, 250, 0.12);
	border: 1px solid var(--border);
	font-size: 0.9rem;
}

.project-links { display: flex; gap: 12px; }
.project-links a { color: var(--accent-2); font-weight: 600; }

/* Timeline (Experience, Volunteering) */
.timeline {
	display: grid;
	gap: 18px;
	position: relative;
}

.timeline::before {
	content: '';
	position: absolute;
	left: 14px;
	top: 0;
	bottom: 0;
	width: 2px;
	background: linear-gradient(180deg, rgba(96,165,250,0.6), rgba(167,139,250,0.4));
}

.timeline-item {
	display: grid;
	grid-template-columns: 30px 1fr;
	gap: 12px;
	position: relative;
}

.timeline-dot {
	width: 16px;
	height: 16px;
	border-radius: 50%;
	background: var(--accent);
	border: 3px solid #0f172a;
	position: relative;
	top: 4px;
	box-shadow: 0 0 0 4px rgba(96, 165, 250, 0.15);
}

.timeline-content {
	background: var(--panel);
	border: 1px solid var(--border);
	border-radius: var(--radius-md);
	padding: 16px;
}

.timeline-header {
	display: flex;
	justify-content: space-between;
	align-items: baseline;
	gap: 12px;
}

.timeline-duration { color: var(--muted); font-size: 0.95rem; }
.timeline-org { color: var(--accent); font-weight: 600; margin: 6px 0; }
.timeline-content ul { padding-left: 18px; list-style: disc; }
.timeline-content li { color: var(--muted); margin-bottom: 6px; }

/* Achievements */
.achievements-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
	gap: 16px;
}

.achievement-card {
	display: flex;
	justify-content: space-between;
	gap: 12px;
}

.achievement-links {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
}

.achievement-links a {
	color: var(--accent-2);
	font-weight: 600;
}

.achievement-meta { color: var(--muted); display: grid; text-align: right; gap: 4px; }

/* Hobbies */
.hobbies-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
	gap: 16px;
}

.hobby-card {
	background: var(--panel);
	border: 1px solid var(--border);
	border-radius: var(--radius-md);
	padding: 16px;
	transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.25s ease;
}

.hobby-card:hover {
	transform: translateY(-4px);
	border-color: rgba(96, 165, 250, 0.6);
	box-shadow: var(--shadow);
}

/* Gallery */
.gallery-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
	gap: 14px;
}

.photo-card {
	position: relative;
	overflow: hidden;
	border-radius: var(--radius-md);
	background: var(--panel);
	border: 1px solid var(--border);
	transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.25s ease;
}

.photo-card img {
	height: 100%;
	width: 100%;
	object-fit: cover;
}

.photo-card figcaption {
	position: absolute;
	left: 0;
	right: 0;
	bottom: 0;
	padding: 10px 12px;
	background: linear-gradient(180deg, transparent 0%, rgba(15, 23, 42, 0.8) 100%);
	color: var(--text);
	font-weight: 600;
}

.photo-card:hover {
	transform: translateY(-4px);
	border-color: rgba(96, 165, 250, 0.6);
	box-shadow: var(--shadow);
}

/* Competitive Programming */
.cp-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
	gap: 16px;
}

.cp-card {
	display: grid;
	gap: 10px;
}
.cp-card .rating { color: var(--accent); font-weight: 700; }
.cp-card a { color: var(--accent-2); font-weight: 600; }

/* Contact */
.contact-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
	gap: 18px;
}

.contact-info {
	background: var(--panel);
	border: 1px solid var(--border);
	border-radius: var(--radius-md);
	padding: 18px;
	display: grid;
	gap: 12px;
}

.social-links { display: grid; gap: 8px; }
.social-links a { color: var(--accent-2); font-weight: 600; }

.contact-card {
	border-radius: var(--radius-sm);
	padding: 12px;
}

/* Footer */
.site-footer {
	border-top: 1px solid var(--border);
	padding: 28px 0;
	background: #0b1220;
}

.footer-content {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: 14px;
}

.footer-links { display: flex; align-items: center; gap: 16px; }
.footer-social { display: flex; gap: 10px; }
.back-to-top { color: var(--accent); font-weight: 700; }

/* Reveal animations */
[data-reveal] {
	opacity: 0;
	transform: translateY(18px);
	transition: opacity 0.5s ease, transform 0.5s ease;
}

[data-reveal].visible {
	opacity: 1;
	transform: translateY(0);
}

/* Responsive */
@media (max-width: 900px) {
	.nav-toggle { display: flex; }
	.nav { position: absolute; inset: 70px 0 auto 0; }
	.nav-links {
		position: absolute;
		top: 64px;
		right: 4vw;
		left: 4vw;
		background: rgba(17, 24, 39, 0.96);
		border: 1px solid var(--border);
		border-radius: var(--radius-md);
		padding: 14px;
		flex-direction: column;
		gap: 8px;
		transform-origin: top right;
		transform: scaleY(0);
		opacity: 0;
		pointer-events: none;
		transition: transform 0.25s ease, opacity 0.25s ease;
	}

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

	.nav-toggle.open .bar:nth-child(1) { transform: translateY(9px) rotate(45deg); }
	.nav-toggle.open .bar:nth-child(2) { opacity: 0; }
	.nav-toggle.open .bar:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

	.timeline::before { left: 8px; }
	.timeline-item { grid-template-columns: 24px 1fr; }
}

@media (max-width: 600px) {
	.nav-container { padding: 14px 0; }
	.section { padding: 72px 0; }
	.hero { min-height: 80vh; }
	.timeline-header { flex-direction: column; align-items: flex-start; }
	.footer-content { flex-direction: column; align-items: flex-start; }
}