/* --- CSS VARIABLES --- */
:root {
	/* Warna tema: Biru Tua (Industrial) & Kuning Safety (Konstruksi) */
	--primary-color: #0d47a1; 
	--secondary-color: #ffeb3b; /* Kuning Terang */
	--accent-color: #fbc02d;
	--text-dark: #212121;
	--text-gray: #616161;
	--white: #ffffff;
	--light-bg: #f5f5f5;
	--whatsapp-color: #25D366;
	--transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
	font-family: 'Roboto', sans-serif;
	color: var(--text-dark);
	line-height: 1.6;
	background-color: var(--white);
}

ul { list-style: none; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }

/* --- UTILITIES --- */
.container {
	max-width: 1200px;
	margin: 0 auto;
	padding: 0 20px;
}

.section-padding { padding: 80px 0; }

.section-header {
	text-align: center;
	margin-bottom: 50px;
}

.section-header h2 {
	font-size: 2.5rem;
	color: var(--primary-color);
	text-transform: uppercase;
	letter-spacing: 1px;
	font-weight: 900;
}

.section-header .divider {
	height: 4px;
	width: 80px;
	background-color: var(--secondary-color);
	margin: 15px auto;
}

/* --- BUTTONS --- */
.btn {
	display: inline-block;
	padding: 12px 30px;
	border-radius: 4px;
	font-weight: 700;
	text-transform: uppercase;
	font-size: 0.9rem;
	transition: var(--transition);
	cursor: pointer;
	border: none;
}

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

.btn-primary:hover {
	background-color: var(--accent-color);
	transform: translateY(-3px);
	box-shadow: 0 5px 15px rgba(251, 192, 45, 0.4);
}

.btn-whatsapp {
	background-color: var(--whatsapp-color);
	color: white;
	display: inline-flex;
	align-items: center;
	gap: 10px;
}

.btn-whatsapp:hover {
	background-color: #1ebc57;
	box-shadow: 0 5px 15px rgba(37, 211, 102, 0.4);
}

/* --- HEADER & NAV --- */
header {
	background-color: var(--white);
	box-shadow: 0 2px 10px rgba(0,0,0,0.1);
	position: sticky;
	top: 0;
	z-index: 1000;
}

nav {
	display: flex;
	justify-content: space-between;
	align-items: center;
	height: 80px;
}

.logo {
	font-size: 1.5rem;
	font-weight: 900;
	color: var(--primary-color);
	display: flex;
	align-items: center;
	gap: 10px;
}

.logo i { color: var(--secondary-color); font-size: 1.8rem; }

.nav-links {
	display: flex;
	gap: 30px;
}

.nav-links a {
	font-weight: 500;
	font-size: 0.95rem;
	color: var(--text-dark);
	transition: var(--transition);
}

.nav-links a:hover {
	color: var(--primary-color);
	padding-bottom: 5px;
	border-bottom: 2px solid var(--secondary-color);
}

.menu-toggle {
	display: none;
	font-size: 1.5rem;
	cursor: pointer;
	color: var(--primary-color);
}

/* --- HERO SECTION --- */
.hero {
	/* Background image: Piles of bricks/materials */
	background: linear-gradient(rgba(13, 71, 161, 0.85), rgba(13, 71, 161, 0.7)), 
				url('https://images.unsplash.com/photo-1558618666-fcd25c85cd64?ixlib=rb-4.0.3&auto=format&fit=crop&w=1600&q=80');
	background-size: cover;
	background-position: center;
	height: 85vh;
	display: flex;
	align-items: center;
	color: var(--white);
	text-align: center;
}

.hero-content h1 {
	font-size: 3.5rem;
	font-weight: 900;
	margin-bottom: 20px;
	line-height: 1.1;
	text-transform: uppercase;
}

.hero-content h1 span {
	color: var(--secondary-color);
}

.hero-content p {
	font-size: 1.2rem;
	margin-bottom: 40px;
	max-width: 700px;
	margin-left: auto;
	margin-right: auto;
	font-weight: 300;
}

/* --- FEATURES / KEUNGGULAN --- */
.features {
	background-color: var(--white);
	margin-top: -50px;
	position: relative;
	z-index: 10;
	padding-bottom: 50px;
}

.features-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
	gap: 30px;
}

.feature-card {
	background: var(--white);
	padding: 30px;
	border-radius: 8px;
	box-shadow: 0 10px 30px rgba(0,0,0,0.1);
	text-align: center;
	border-top: 4px solid var(--secondary-color);
	transition: var(--transition);
	margin-top: -2rem;
}

.feature-card:hover {
	transform: translateY(-5px);
}

.feature-icon {
	font-size: 2.5rem;
	color: var(--primary-color);
	margin-bottom: 20px;
}

.feature-card h3 {
	margin-bottom: 10px;
	font-size: 1.2rem;
}

.feature-card p {
	font-size: 0.9rem;
	color: var(--text-gray);
}

/* --- PRODUCT CATALOG --- */
.products {
	background-color: var(--light-bg);
}

.product-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
	gap: 30px;
}

.product-card {
	background: var(--white);
	border-radius: 8px;
	overflow: hidden;
	box-shadow: 0 5px 15px rgba(0,0,0,0.05);
	transition: var(--transition);
	position: relative;
}

.product-card:hover {
	transform: translateY(-5px);
	box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

.product-img {
	height: 200px;
	overflow: hidden;
}

.product-img img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: var(--transition);
}

.product-card:hover .product-img img {
	transform: scale(1.1);
}

.product-info {
	padding: 20px;
}

.product-cat {
	font-size: 0.8rem;
	color: var(--primary-color);
	font-weight: 700;
	text-transform: uppercase;
}

.product-title {
	font-size: 1.2rem;
	margin: 5px 0 10px;
	font-weight: 700;
}

.product-desc {
	font-size: 0.9rem;
	color: var(--text-gray);
	margin-bottom: 15px;
}

/* --- BRANDS / PARTNERS --- */
.brands {
	background-color: var(--primary-color);
	color: var(--white);
	padding: 60px 0;
	text-align: center;
}

.brands p {
	margin-bottom: 30px;
	font-size: 1.1rem;
	opacity: 0.8;
}

.brand-logos {
	display: flex;
	justify-content: center;
	flex-wrap: wrap;
	gap: 40px;
	opacity: 0.7;
}

.brand-logos i {
	font-size: 3rem;
	transition: var(--transition);
}

.brand-logos i:hover {
	opacity: 1;
	color: var(--secondary-color);
}

/* --- CTA SECTION --- */
.cta-section {
	background: linear-gradient(135deg, var(--text-dark) 0%, #424242 100%);
	color: var(--white);
	text-align: center;
	padding: 80px 20px;
}

.cta-section h2 {
	font-size: 2.2rem;
	margin-bottom: 15px;
}

.cta-section p {
	margin-bottom: 30px;
	opacity: 0.9;
}

/* --- FOOTER --- */
footer {
	background-color: #1a1a1a;
	color: #ccc;
	padding: 60px 0 20px;
}

.footer-grid {
	display: grid;
	grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
	gap: 40px;
	margin-bottom: 40px;
}

.footer-col h3 {
	color: var(--white);
	margin-bottom: 20px;
	position: relative;
	padding-bottom: 10px;
}

.footer-col h3::after {
	content: '';
	position: absolute;
	left: 0;
	bottom: 0;
	width: 30px;
	height: 3px;
	background-color: var(--secondary-color);
}

.footer-links li {
	margin-bottom: 12px;
}

.footer-links a {
	transition: var(--transition);
}

.footer-links a:hover {
	color: var(--secondary-color);
	padding-left: 5px;
}

.contact-list li {
	display: flex;
	align-items: center;
	gap: 10px;
	margin-bottom: 15px;
}

.social-links a {
	display: inline-flex;
	justify-content: center;
	align-items: center;
	width: 35px;
	height: 35px;
	background: rgba(255,255,255,0.1);
	color: var(--white);
	border-radius: 50%;
	margin-right: 10px;
	transition: var(--transition);
}

.social-links a:hover {
	background: var(--secondary-color);
	color: var(--text-dark);
}

.copyright {
	text-align: center;
	border-top: 1px solid rgba(255,255,255,0.1);
	padding-top: 20px;
	font-size: 0.85rem;
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
	.hero-content h1 { font-size: 2.2rem; }
	.nav-links {
		position: absolute;
		top: 80px;
		left: 0;
		width: 100%;
		background: var(--white);
		flex-direction: column;
		padding: 20px;
		text-align: center;
		box-shadow: 0 5px 10px rgba(0,0,0,0.1);
		display: none;
	}
	.nav-links.active { display: flex; }
	.menu-toggle { display: block; }
	.features { margin-top: 0; padding-top: 50px; }
}