:root {
	color-scheme: light;
	--overlay: rgba(7, 12, 28, 0.6);
	--accent: #4fc3f7;
	--text: #f7f8ff;
	--muted: rgba(247, 248, 255, 0.72);
}

* {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
	font-family: "Pretendard", "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
}

body {
	min-height: 100vh;
	color: var(--text);
	background-color: #080c1d;
}

.hero {
	position: relative;
	min-height: 100vh;
	background-image: linear-gradient(var(--overlay), var(--overlay)),
		url("https://images.unsplash.com/photo-1500530855697-b586d89ba3ee?auto=format&fit=crop&w=1600&q=80");
	background-size: cover;
	background-position: center;
	display: flex;
	flex-direction: column;
	padding-top: 90px;
}

/* Page specific backgrounds can be overridden or added */
.page-container {
	position: relative;
	min-height: 100vh;
	background-color: #080c1d;
	display: flex;
	flex-direction: column;
}

/* Prevent fixed header from covering content when scrolling to ID */
section[id] {
	scroll-margin-top: 100px;
}

header {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	z-index: 1000;
	background: rgba(8, 12, 29, 0.1);
	backdrop-filter: blur(10px);
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: 28px 8vw;
	transition: background 0.3s ease, padding 0.3s ease;
}

header.scrolled {
	background: rgba(8, 12, 29, 0.85);
	padding: 20px 8vw;
	box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.logo {
	display: flex;
	align-items: center;
	text-decoration: none;
}

.logo img {
	height: 40px;
	width: auto;
	background-color: transparent;
}

nav ul {
	list-style: none;
	display: flex;
	gap: 28px;
}

nav a {
	text-decoration: none;
	color: var(--text);
	font-weight: 500;
	letter-spacing: 0.02em;
	position: relative;
}

nav a::after {
	content: "";
	position: absolute;
	left: 0;
	bottom: -8px;
	width: 0;
	height: 2px;
	background-color: var(--accent);
	transition: width 0.3s ease;
}

nav a:hover::after,
nav a:focus-visible::after {
	width: 100%;
}

nav a.active::after {
	width: 100%;
}

.hero-content {
	flex: 1;
	display: grid;
	place-items: center;
	text-align: center;
	padding: 0 12vw 80px;
}

.hero-content h1 {
	font-size: clamp(2.6rem, 4vw, 4.4rem);
	line-height: 1.15;
	margin-bottom: 20px;
}

.hero-content p {
	font-size: clamp(1rem, 1.4vw, 1.3rem);
	color: var(--muted);
	max-width: 640px;
	margin: 0 auto 32px;
}

.hero-actions {
	display: flex;
	gap: 16px;
	justify-content: center;
	flex-wrap: wrap;
}

.btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: 12px 28px;
	border-radius: 999px;
	font-weight: 600;
	letter-spacing: 0.02em;
	border: 1px solid transparent;
	text-decoration: none;
	transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
	cursor: pointer;
}

.btn-primary {
	background: var(--accent);
	color: #061019;
	box-shadow: 0 12px 24px rgba(79, 195, 247, 0.25);
}

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

.btn-secondary {
	background: transparent;
	border-color: rgba(255, 255, 255, 0.4);
	color: var(--text);
}

.quick-info {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
	gap: 18px;
	padding: 0 8vw 48px;
}

.info-card {
	background: rgba(255, 255, 255, 0.08);
	padding: 18px 20px;
	border-radius: 16px;
	backdrop-filter: blur(8px);
	border: 1px solid rgba(255, 255, 255, 0.12);
}

.info-card span {
	color: var(--accent);
	font-weight: 600;
	font-size: 0.9rem;
	text-transform: uppercase;
	letter-spacing: 0.1em;
}

.info-card h3 {
	margin: 10px 0 6px;
	font-size: 1.2rem;
}

.info-card p {
	color: var(--muted);
	font-size: 0.95rem;
	line-height: 1.5;
}

/* Specific Content Styles */
.content-section {
	padding: 100px 8vw;
	width: 100%;
	background-color: #ffffff;
	color: #1a1a1a;
}

.content-inner {
	max-width: 1200px;
	margin: 0 auto;
}

#about,
#products,
#contact {
	background-image: none;
}

.content-section:nth-of-type(even) {
	background-color: #f8f9fa;
}

.content-section h2 {
	font-size: 2.5rem;
	margin-bottom: 2rem;
	color: #111;
}

.content-section p {
	font-size: 1.15rem;
	color: #333;
	line-height: 1.7;
	margin-bottom: 1.5rem;
	word-break: keep-all;
}

.content-section .info-card {
	background: rgba(0, 0, 0, 0.03);
	border: 1px solid rgba(0, 0, 0, 0.06);
}

.content-section .info-card h3 {
	color: #111;
}

.content-section .info-card p {
	color: #555;
}

@media (max-width: 720px) {
	header {
		flex-direction: column;
		gap: 16px;
	}

	nav ul {
		gap: 18px;
	}
}

footer {
	background-color: #050814;
	color: var(--muted);
	height: 100px;
	display: flex;
	align-items: center;
	justify-content: center;
	font-size: 0.9rem;
	border-top: 1px solid rgba(255, 255, 255, 0.05);
}