/* ============================================
   ROOT VARIABLES
   ============================================ */
:root {
	/* Colors - Primary */
	--color-primary: #e53d00;
	--color-primary-hover: #5448c8;

	/* Colors - Neutrals */
	--color-text: #1a1a1a;
	--color-text-muted: #4a4a4a;
	--color-text-light: #6b7280;
	--color-background: #ffffff;
	--color-background-alt: #f0f0f0;
	--color-border: #e8e8e8;
	--color-border-hover: #d0d0d0;

	/* Colors - Hero */
	--color-hero-bg: #ffd166;

	/* Colors - Footer */
	--color-footer-bg: #1a1b25;
	--color-footer-text: #ffffff;
	--color-footer-text-light: #d1d5db;
	--color-footer-text-muted: #9ca3af;

	/* Typography */
	--font-heading: 'Cal Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
	--font-body: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;

	/* Font Weights */
	--font-weight-normal: 400;
	--font-weight-medium: 500;
	--font-weight-semibold: 600;
	--font-weight-bold: 700;

	/* Font Sizes */
	--text-xs: 0.875rem;
	--text-sm: 0.95rem;
	--text-base: 1rem;
	--text-lg: 1.05rem;
	--text-xl: 1.125rem;
	--text-2xl: 1.25rem;
	--text-3xl: 1.35rem;
	--text-4xl: 1.5rem;
	--text-5xl: 2rem;
	--text-6xl: 2.5rem;

	/* Spacing */
	--spacing-xs: 0.5rem;
	--spacing-sm: 1rem;
	--spacing-md: 1.5rem;
	--spacing-lg: 2rem;
	--spacing-xl: 2.5rem;
	--spacing-2xl: 3rem;
	--spacing-3xl: 4rem;
	--spacing-4xl: 6rem;
	--spacing-5xl: 8rem;

	/* Layout */
	--max-width: 1200px;
	--container-padding: 5%;

	/* Borders & Radius */
	--border-radius-sm: 10px;
	--border-radius-md: 16px;
	--border-radius-lg: 2rem;

	/* Shadows */
	--shadow-sm: 0 8px 16px rgba(0, 0, 0, 0.04);
	--shadow-md: 0 20px 40px rgba(0, 0, 0, 0.08);
	--shadow-combined: var(--shadow-md), var(--shadow-sm);

	/* Transitions */
	--transition-fast: 0.2s ease;
	--transition-normal: 0.3s ease;
	--transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

	/* Z-Index */
	--z-header: 100;
}

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

html {
	scroll-behavior: smooth;
	font-size: 16px;
}

body {
	font-family: var(--font-body);
	color: var(--color-text);
	line-height: 1.7;
	background-color: var(--color-background);
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1,
h2,
h3,
h4,
h5,
h6 {
	font-family: var(--font-heading);
	font-weight: var(--font-weight-semibold);
	color: var(--color-text);
}

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

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

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

ul {
	list-style: none;
}

/* ============================================
   HEADER & NAVIGATION
   ============================================ */
header {
	position: sticky;
	top: 0;
	z-index: var(--z-header);
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: var(--spacing-sm) var(--container-padding);
	background-color: rgba(255, 255, 255, 0.95);
	backdrop-filter: blur(10px);
	border-bottom: 1px solid var(--color-background-alt);
}

header h3 a {
	font-size: var(--text-4xl);
	font-weight: var(--font-weight-bold);
	color: var(--color-text);
	letter-spacing: -0.5px;
}

header h3 a:hover {
	color: var(--color-primary);
}

/* Hamburger Button */
.hamburger {
	display: none;
	flex-direction: column;
	justify-content: space-between;
	width: 28px;
	height: 20px;
	background: transparent;
	border: none;
	cursor: pointer;
	padding: 0;
	z-index: calc(var(--z-header) + 10);
}

.hamburger-line {
	display: block;
	width: 100%;
	height: 2px;
	background-color: var(--color-text);
	border-radius: 2px;
	transition: transform var(--transition-smooth), opacity var(--transition-smooth);
	transform-origin: center;
}

/* Hamburger Animation - X shape */
.hamburger.active .hamburger-line:nth-child(1) {
	transform: translateY(9px) rotate(45deg);
}

.hamburger.active .hamburger-line:nth-child(2) {
	opacity: 0;
}

.hamburger.active .hamburger-line:nth-child(3) {
	transform: translateY(-9px) rotate(-45deg);
}

header nav {
	display: flex;
	align-items: center;
	gap: var(--spacing-xl);
}

header nav ul {
	display: flex;
	gap: var(--spacing-xl);
}

header nav ul li a {
	color: var(--color-text-muted);
	font-weight: var(--font-weight-semibold);
	font-size: var(--text-base);
	position: relative;
	padding-bottom: 2px;
}

header nav ul li a::after {
	content: '';
	position: absolute;
	bottom: 0;
	left: 0;
	width: 0;
	height: 2px;
	background-color: var(--color-primary);
	transition: width var(--transition-normal);
}

header nav ul li a:hover {
	color: var(--color-primary);
}

header nav ul li a:hover::after {
	width: 100%;
}

/* Header Icons */
.header-icons {
	display: flex;
	gap: var(--spacing-md);
	align-items: center;
}

.header-icon {
	width: 25px;
	height: 25px;
	opacity: 0.7;
	transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.header-icon:hover {
	opacity: 1;
	transform: scale(1.1);
}

/* ============================================
   MAIN CONTENT CONTAINER
   ============================================ */
main {
	max-width: var(--max-width);
	margin: 0 auto;
	padding: 0 var(--container-padding);
}

/* ============================================
   HERO SECTION
   ============================================ */
#hero {
	background-color: var(--color-hero-bg);
	padding: var(--spacing-5xl) var(--container-padding) var(--spacing-4xl);
}

#hero h1 {
	font-size: clamp(2.5rem, 6vw, 4.5rem);
	font-weight: var(--font-weight-medium);
	line-height: 1.2;
	letter-spacing: -1.5px;
	color: var(--color-text);
	text-align: left;
}

/* ============================================
   HERO SUBHEADING
   ============================================ */
#hero-subheading {
	padding: var(--spacing-2xl) 0 var(--spacing-lg) 0;
}

#hero-subheading p {
	font-size: var(--text-4xl);
	font-weight: var(--font-weight-medium);
	color: var(--color-text-muted);
	line-height: 1.8;
}

#hero-subheading a button {
	margin-top: var(--spacing-lg);
}

/* ============================================
   HORIZONTAL RULE
   ============================================ */
hr {
	border: none;
	height: 2px;
	background: black;
	margin: var(--spacing-4xl) auto 0;
}

hr + section {
	margin-top: 0;
}

/* ============================================
   WORK SECTION
   ============================================ */
#work {
	padding: var(--spacing-xs) 0;
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
	gap: var(--spacing-lg);
}

#work h2 {
	font-size: var(--text-6xl);
	margin-bottom: var(--spacing-xl);
	letter-spacing: -1px;
	grid-column: 1 / -1;
}

/* ============================================
   CARDS
   ============================================ */
.card {
	display: flex;
	flex-direction: column;
	background-color: transparent;
	cursor: pointer;
	transform-origin: center center;
	transition: transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.card:hover {
	transform: rotate(5deg);
}

.card img {
	width: 100%;
	height: auto;
	aspect-ratio: 3 / 2;
	object-fit: cover;
	border-radius: var(--border-radius-md);
}

.card h3 {
	font-size: var(--text-3xl);
	margin-bottom: var(--spacing-xs);
	letter-spacing: -0.5px;
	padding: var(--spacing-md) 0 0;
}

.card h4 {
	font-size: var(--text-base);
	font-weight: var(--font-weight-normal);
	color: var(--color-text-light);
	padding: 0;
}

/* ============================================
   ABOUT SECTION
   ============================================ */
#about {
	padding: var(--spacing-xs) 0 var(--spacing-2xl);
	max-width: 1000px;
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: var(--spacing-lg) var(--spacing-2xl);
	align-items: start;
}

#about h2 {
	font-size: var(--text-6xl);
	margin-bottom: var(--spacing-lg);
	letter-spacing: -1px;
	grid-column: 1 / -1;
}

#about h4 {
	font-size: var(--text-4xl);
	font-weight: var(--font-weight-normal);
	line-height: 1.7;
	color: var(--color-text-muted);
	margin-bottom: 0;
}

#about p {
	font-size: var(--text-2xl);
	font-weight: var(--font-weight-medium);
	color: var(--color-text-muted);
	margin-bottom: var(--spacing-md);
	line-height: 1.8;
	grid-column: 2;
}

/* ============================================
   CONTACT SECTION
   ============================================ */
#contact {
	padding: var(--spacing-xs) 0 var(--spacing-2xl);
	max-width: 800px;
}

#contact h2 {
	font-size: var(--text-6xl);
	margin-bottom: var(--spacing-sm);
	letter-spacing: -1px;
}

#contact h1 {
	font-size: clamp(2rem, 4vw, 3rem);
	margin-bottom: var(--spacing-lg);
	letter-spacing: -1px;
	color: var(--color-text);
}

#contact p {
	font-size: var(--text-lg);
	color: var(--color-text-muted);
	margin-bottom: var(--spacing-sm);
	line-height: 1.8;
}

#contact a {
	font-weight: var(--font-weight-medium);
}

#contact ul {
	margin-top: var(--spacing-lg);
}

#contact ul li {
	margin-bottom: var(--spacing-xs);
}

#contact ul li a {
	font-size: var(--text-3xl);
	color: var(--color-text-muted);
	font-weight: var(--font-weight-semibold);
	text-decoration-line: underline;
}

#contact ul li a:hover {
	color: var(--color-primary);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
	font-family: var(--font-body);
	font-size: var(--text-base);
	font-weight: var(--font-weight-semibold);
	padding: var(--spacing-sm) var(--spacing-lg);
	border-radius: var(--border-radius-sm);
	border: none;
	cursor: pointer;
	transition: all var(--transition-fast);
}

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

.btn-primary:hover {
	background-color: var(--color-primary-hover);
	transform: translateY(-2px);
	box-shadow: var(--shadow-sm);
}

.btn-primary:active {
	transform: translateY(0);
}

/* ============================================
   FOOTER
   ============================================ */
footer {
	background-color: var(--color-footer-bg);
	padding: var(--spacing-3xl) var(--container-padding) var(--spacing-2xl);
}

.footer-content {
	flex: 1;
}

.footer-content h3 {
	font-size: var(--text-4xl);
	margin-bottom: var(--spacing-sm);
	color: var(--color-footer-text);
}

.footer-content h4 {
	font-size: var(--text-base);
	font-weight: var(--font-weight-medium);
	color: var(--color-footer-text-light);
	margin-bottom: var(--spacing-sm);
	text-transform: uppercase;
	letter-spacing: 1px;
	font-family: var(--font-body);
}

.footer-content nav ul {
	display: flex;
	flex-direction: column;
	gap: var(--spacing-sm);
}

.footer-content nav ul li a {
	color: var(--color-footer-text-light);
	font-weight: var(--font-weight-medium);
}

.footer-content nav ul li a:hover {
	color: var(--color-primary);
}

.footer-content .footer-icon {
	display: inline-block;
	width: 24px;
	height: 24px;
	opacity: 0.7;
	margin: 0 var(--spacing-xs);
	transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.footer-content .footer-icon:hover {
	opacity: 1;
	transform: scale(1.15);
}

footer > p {
	margin-top: var(--spacing-2xl);
	padding-top: var(--spacing-lg);
	border-top: 1px solid rgba(255, 255, 255, 0.1);
	font-size: var(--text-xs);
	color: var(--color-footer-text-muted);
}

@media (min-width: 769px) {
	footer .footer-content-wrapper {
		display: grid;
		grid-template-columns: repeat(3, 1fr);
		gap: var(--spacing-2xl);
	}
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
	header {
		padding: var(--spacing-sm) var(--container-padding);
	}

	/* Show hamburger on mobile */
	.hamburger {
		display: flex;
	}

	/* Mobile nav dropdown */
	header nav {
		position: absolute;
		top: 100%;
		left: 0;
		right: 0;
		background-color: var(--color-background);
		flex-direction: column;
		align-items: stretch;
		padding: var(--spacing-lg);
		gap: var(--spacing-md);
		border-bottom: 1px solid var(--color-border);
		box-shadow: var(--shadow-sm);
		
		/* Hidden by default */
		opacity: 0;
		visibility: hidden;
		transform: translateY(-10px);
		transition: opacity var(--transition-smooth), visibility var(--transition-smooth), transform var(--transition-smooth);
	}

	header nav.open {
		opacity: 1;
		visibility: visible;
		transform: translateY(0);
	}

	header nav ul {
		flex-direction: column;
		gap: var(--spacing-sm);
	}

	header nav ul li a {
		display: block;
		padding: var(--spacing-sm) 0;
		font-size: var(--text-lg);
	}

	.header-icons {
		display: flex;
		gap: var(--spacing-md);
		padding-top: var(--spacing-md);
		border-top: 1px solid var(--color-border);
	}

	#hero {
		padding: var(--spacing-4xl) var(--container-padding) var(--spacing-3xl);
	}

	#hero h1 {
		font-size: clamp(2rem, 8vw, 3rem);
	}

	#work,
	#about,
	#contact {
		max-width: 100%;
	}

	#about {
		grid-template-columns: 1fr;
	}

	#about p {
		grid-column: 1;
	}

	#work h2,
	#about h2,
	#contact h2 {
		font-size: var(--text-5xl);
	}

	#contact ul {
		flex-direction: column;
		gap: var(--spacing-sm);
	}

	footer nav ul {
		flex-direction: column;
		gap: var(--spacing-sm);
	}
}