:root {
	--primary: #2563eb;
	--secondary: #1e40af;
	--text: #111827;
	--muted: #6b7280;
	--surface: #ffffff;
	--bg: #f8fafc;
	--border: #e5e7eb;
}

* {
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

html {
	scroll-behavior: smooth;
}

body {
	font-family: "Noto Sans KR", sans-serif;
	color: var(--text);
	background-color: var(--bg);
	line-height: 1.6;
	padding-top: 84px;
}

header {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	z-index: 1000;
	background-color: rgba(255, 255, 255, 0.96);
	border-bottom: 1px solid transparent;
	transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

body.scrolled header {
	box-shadow: 0 10px 30px rgba(15, 23, 42, 0.12);
	border-color: var(--border);
}

nav,
main > section,
footer {
	max-width: 1200px;
	margin: 0 auto;
	padding-left: 24px;
	padding-right: 24px;
}

nav {
	height: 84px;
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 24px;
}

.nav-logo a {
	font-size: 1.25rem;
	font-weight: 800;
	color: var(--primary);
	text-decoration: none;
}

.nav-right {
	display: flex;
	align-items: center;
	gap: 24px;
}

.nav-menu {
	list-style: none;
	display: flex;
	align-items: center;
	gap: 20px;
}

.nav-menu a {
	text-decoration: none;
	color: var(--text);
	font-weight: 500;
}

.cta-button,
.cta-primary,
.submit-button {
	background-color: var(--primary);
	color: #fff;
	text-decoration: none;
	border: none;
	border-radius: 10px;
	padding: 12px 20px;
	font-weight: 700;
	cursor: pointer;
	transition: background-color 0.2s ease, transform 0.2s ease;
}

.cta-button:hover,
.cta-primary:hover,
.submit-button:hover {
	background-color: var(--secondary);
	transform: translateY(-1px);
}

.cta-secondary {
	text-decoration: none;
	color: var(--primary);
	font-weight: 700;
	border: 1px solid var(--primary);
	border-radius: 10px;
	padding: 12px 20px;
	transition: background-color 0.2s ease, color 0.2s ease;
}

.cta-secondary:hover {
	background-color: var(--primary);
	color: #fff;
}

main > section {
	padding-top: 100px;
	padding-bottom: 100px;
}

#hero {
	min-height: calc(100vh - 84px);
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: flex-start;
	gap: 20px;
	background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 35%, #93c5fd 100%);
	border-radius: 20px;
	margin-top: 20px;
}

#hero h1 {
	font-size: clamp(2rem, 4.5vw, 3.5rem);
	line-height: 1.2;
	max-width: 840px;
}

#hero p {
	font-size: 1.1rem;
	max-width: 720px;
	color: #1f2937;
}

.hero-cta {
	display: flex;
	gap: 12px;
	flex-wrap: wrap;
}

#services h2,
#features h2,
#reviews h2,
#contact h2 {
	font-size: clamp(1.6rem, 3vw, 2.2rem);
	margin-bottom: 28px;
}

.service-cards,
.review-cards {
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 20px;
}

.service-card,
.review-card {
	background-color: var(--surface);
	border: 1px solid var(--border);
	border-radius: 16px;
	padding: 24px;
	transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.service-card:hover,
.review-card:hover {
	transform: translateY(-6px);
	box-shadow: 0 14px 28px rgba(37, 99, 235, 0.15);
}

.service-card i {
	font-size: 1.6rem;
	color: var(--primary);
	margin-bottom: 12px;
}

.service-card h3,
.feature-item h3,
.review-card h3 {
	margin-bottom: 8px;
}

.service-card p,
.feature-item p,
.review-card p,
.review-card span {
	color: var(--muted);
}

.feature-content {
	display: flex;
	justify-content: flex-start;
}

.feature-list {
	max-width: 760px;
	display: grid;
	gap: 18px;
}

.feature-item {
	display: flex;
	align-items: flex-start;
	gap: 14px;
	background-color: var(--surface);
	border: 1px solid var(--border);
	border-radius: 14px;
	padding: 20px;
}

.feature-item i {
	font-size: 1.4rem;
	color: var(--primary);
	margin-top: 3px;
}

.feature-item strong {
	color: var(--secondary);
}

.review-stars {
	display: flex;
	gap: 4px;
	color: #f59e0b;
	margin-bottom: 10px;
}

.review-card span {
	display: inline-block;
	margin-top: 2px;
	font-size: 0.95rem;
}

#contact {
	text-align: center;
}

#contact form {
	max-width: 700px;
	margin: 0 auto;
	background-color: var(--surface);
	border: 1px solid var(--border);
	border-radius: 18px;
	padding: 28px;
	text-align: left;
}

.form-group {
	display: flex;
	flex-direction: column;
	gap: 8px;
	margin-bottom: 16px;
}

.form-group label {
	font-weight: 600;
}

.form-group input,
.form-group textarea {
	width: 100%;
	padding: 12px 14px;
	border: 1px solid #cbd5e1;
	border-radius: 10px;
	font: inherit;
}

.form-group textarea {
	resize: vertical;
	min-height: 140px;
}

footer {
	padding-top: 36px;
	padding-bottom: 36px;
	text-align: center;
	color: var(--muted);
}

@media (max-width: 768px) {
	body {
		padding-top: 72px;
	}

	nav {
		height: 72px;
	}

	.nav-menu {
		display: none;
	}

	#hero {
		min-height: calc(100vh - 72px);
		padding-top: 80px;
		padding-bottom: 80px;
	}

	.service-cards,
	.review-cards {
		grid-template-columns: 1fr;
	}

	.feature-list {
		grid-template-columns: 1fr;
	}

	#contact form {
		padding: 20px;
	}
}