/**
 * FRW Architects - Custom Stylesheet
 * Mobile-first responsive design with BEM methodology
 */

/* ====================================
   CSS Variables
   ==================================== */
:root {
	--color-black: #000000;
	--color-white: #ffffff;
	--color-gray-light: #f5f5f5;
	--color-gray: #999999;
	--color-gray-dark: #333333;

	--font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

	--spacing-xs: 8px;
	--spacing-sm: 16px;
	--spacing-md: 24px;
	--spacing-lg: 48px;
	--spacing-xl: 64px;

	--transition: 0.3s ease;

	--max-width: 1400px;
}

/* ====================================
   Reset & Base Styles
   ==================================== */
* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

html {
	font-size: 16px;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
}

body {
	font-family: var(--font-primary);
	background-color: var(--color-white);
	color: var(--color-black);
	line-height: 1.6;
	overflow-x: hidden;
}

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

a {
	color: var(--color-black);
	text-decoration: none;
	transition: opacity var(--transition);
}

a:hover {
	opacity: 0.6;
}

/* ====================================
   Typography
   ==================================== */
h1, h2, h3, h4, h5, h6 {
	font-weight: 400;
	line-height: 1.2;
	margin-bottom: var(--spacing-md);
}

h1 {
	font-size: 2.5rem;
}

h2 {
	font-size: 2rem;
}

h3 {
	font-size: 1.5rem;
}

p {
	margin-bottom: var(--spacing-sm);
}

/* ====================================
   Layout
   ==================================== */
#main {
	min-height: 100vh;
	display: flex;
	flex-direction: column;
}

.container {
	max-width: var(--max-width);
	margin: 0 auto;
	padding: 0 var(--spacing-md);
}

.content {
	flex: 1;
}

/* ====================================
   Header & Navigation
   ==================================== */
.header {
	background-color: #fff;
	padding: 10px 0;
	box-shadow: 0 0 10px rgba(0,0,0,.25);
	position: sticky;
	top: 0;
	z-index: 1000;
}

.main-nav {
	max-width: var(--max-width);
	margin: 0 auto;
	padding: 0 var(--spacing-md);
}

.nav-container {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--spacing-md);
}

.nav-logo {
	display: block;
	height: 40px;
	flex-shrink: 0;
}

.nav-logo img {
	height: 100%;
	width: auto;
	display: block;
}

.nav-list {
	list-style: none;
	display: flex;
	flex-wrap: wrap;
	gap: var(--spacing-md);
	align-items: center;
	margin-left: auto;
}

.nav-list li {
	font-size: 12px;
	text-transform: uppercase;
	letter-spacing: 1px;
}

.nav-list li.active a {
	font-weight: 600;
}

.nav-list .lang-switch {
	border-left: 1px solid rgba(0, 0, 0, 0.2);
	padding-left: var(--spacing-md);
}

/* ====================================
   Breadcrumb
   ==================================== */
.breadcrumb {
	background-color: var(--color-gray-light);
	padding: var(--spacing-sm) 0;
	font-size: 0.875rem;
}

.breadcrumb-list {
	max-width: var(--max-width);
	margin: 0 auto;
	padding: 0 var(--spacing-md);
	list-style: none;
	display: flex;
	gap: var(--spacing-xs);
	flex-wrap: wrap;
}

.breadcrumb-list li::after {
	content: '›';
	margin-left: var(--spacing-xs);
	color: var(--color-gray);
}

.breadcrumb-list li:last-child::after {
	content: '';
}

.breadcrumb-list li.active {
	color: var(--color-gray);
}

/* ====================================
   Home Page
   ==================================== */
.home {
	margin: 0;
}

.home-hero {
	position: relative;
	height: 100vh;
	width: 100%;
	overflow: hidden;
}

.home-video-container {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
}

.home-video {
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.home-overlay {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	display: flex;
	align-items: center;
	justify-content: center;
	background-color: rgba(0, 0, 0, 0.3);
}

.home-content {
	text-align: center;
	color: var(--color-white);
	padding: var(--spacing-md);
}

.home-title {
	font-size: 4rem;
	font-weight: 300;
	margin-bottom: var(--spacing-sm);
	text-transform: uppercase;
	letter-spacing: 4px;
}

.home-subtitle {
	font-size: 1.25rem;
	font-weight: 300;
	letter-spacing: 2px;
}

/* ====================================
   Projects Page
   ==================================== */
.page-title {
	margin: var(--spacing-lg) 0 var(--spacing-md);
	text-align: center;
	text-transform: uppercase;
	letter-spacing: 2px;
	font-weight: 300;
}

.projects-filters {
	margin-bottom: var(--spacing-lg);
	padding: var(--spacing-md);
	background-color: var(--color-gray-light);
	border-radius: 2px;
}

.filter-group {
	margin-bottom: var(--spacing-md);
}

.filter-group:last-child {
	margin-bottom: 0;
}

.filter-label {
	display: block;
	margin-bottom: var(--spacing-sm);
	font-size: 0.875rem;
	text-transform: uppercase;
	letter-spacing: 1px;
	font-weight: 600;
}

.filter-buttons {
	display: flex;
	gap: var(--spacing-xs);
	flex-wrap: wrap;
}

.filter-btn {
	padding: var(--spacing-xs) var(--spacing-sm);
	background-color: var(--color-white);
	border: 1px solid var(--color-black);
	color: var(--color-black);
	cursor: pointer;
	transition: all var(--transition);
	font-size: 0.875rem;
	text-transform: uppercase;
	letter-spacing: 1px;
}

.filter-btn:hover,
.filter-btn.active {
	background-color: var(--color-black);
	color: var(--color-white);
}

.projects-grid {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--spacing-md);
	margin-bottom: var(--spacing-lg);
}

@media (min-width: 768px) {
	.projects-grid {
		grid-template-columns: repeat(2, 1fr);
	}
}

@media (min-width: 1024px) {
	.projects-grid {
		grid-template-columns: repeat(3, 1fr);
	}
}

.project-card {
	position: relative;
	overflow: hidden;
	aspect-ratio: 1;
	background-color: var(--color-gray-light);
}

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

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

.project-card-overlay {
	position: absolute;
	bottom: 0;
	left: 0;
	right: 0;
	padding: var(--spacing-md);
	background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 100%);
	color: var(--color-white);
	transform: translateY(100%);
	transition: transform var(--transition);
}

.project-card:hover .project-card-overlay {
	transform: translateY(0);
}

.project-card-title {
	font-size: 1.125rem;
	margin-bottom: var(--spacing-xs);
}

.project-card-meta {
	font-size: 0.875rem;
	opacity: 0.8;
}

.loading {
	text-align: center;
	padding: var(--spacing-xl) 0;
	color: var(--color-gray);
}

.no-results {
	text-align: center;
	padding: var(--spacing-xl) 0;
	color: var(--color-gray);
}

/* ====================================
   Single Project Page
   ==================================== */
.project-meta {
	margin-bottom: var(--spacing-lg);
	padding: var(--spacing-md);
	background-color: var(--color-gray-light);
}

.project-info {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--spacing-sm);
}

@media (min-width: 768px) {
	.project-info {
		grid-template-columns: repeat(2, 1fr);
	}
}

.project-info-item {
	display: flex;
	gap: var(--spacing-sm);
}

.project-info-label {
	font-weight: 600;
}

.project-description {
	margin-bottom: var(--spacing-lg);
	line-height: 1.8;
}

.project-gallery {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--spacing-md);
	margin-bottom: var(--spacing-lg);
}

@media (min-width: 768px) {
	.project-gallery {
		grid-template-columns: repeat(2, 1fr);
	}
}

.project-gallery img {
	width: 100%;
	cursor: pointer;
	transition: opacity var(--transition);
}

.project-gallery img:hover {
	opacity: 0.8;
}

.project-nav {
	text-align: center;
	padding: var(--spacing-lg) 0;
}

.btn-back {
	display: inline-block;
	padding: var(--spacing-sm) var(--spacing-md);
	border: 1px solid var(--color-black);
	text-transform: uppercase;
	letter-spacing: 1px;
	font-size: 0.875rem;
}

/* ====================================
   Contact Page
   ==================================== */
.contact-intro {
	text-align: center;
	margin-bottom: var(--spacing-lg);
}

.contact-container {
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--spacing-lg);
	margin-bottom: var(--spacing-xl);
}

@media (min-width: 768px) {
	.contact-container {
		grid-template-columns: 2fr 1fr;
	}
}

.contact-form {
	display: flex;
	flex-direction: column;
	gap: var(--spacing-md);
}

.form-group {
	display: flex;
	flex-direction: column;
}

.form-label {
	margin-bottom: var(--spacing-xs);
	font-size: 0.875rem;
	text-transform: uppercase;
	letter-spacing: 1px;
}

.required {
	color: var(--color-gray);
}

.form-input,
.form-textarea {
	padding: var(--spacing-sm);
	border: 1px solid var(--color-gray);
	font-family: inherit;
	font-size: 1rem;
	transition: border-color var(--transition);
}

.form-input:focus,
.form-textarea:focus {
	outline: none;
	border-color: var(--color-black);
}

.btn-submit {
	padding: var(--spacing-sm) var(--spacing-md);
	background-color: var(--color-black);
	color: var(--color-white);
	border: none;
	cursor: pointer;
	text-transform: uppercase;
	letter-spacing: 1px;
	font-size: 0.875rem;
	transition: opacity var(--transition);
}

.btn-submit:hover {
	opacity: 0.8;
}

.form-message {
	padding: var(--spacing-sm);
	border-radius: 2px;
	font-size: 0.875rem;
}

.form-message.success {
	background-color: #d4edda;
	color: #155724;
}

.form-message.error {
	background-color: #f8d7da;
	color: #721c24;
}

.contact-info {
	padding: var(--spacing-md);
	background-color: var(--color-gray-light);
}

.contact-info-item {
	margin-bottom: var(--spacing-md);
}

/* ====================================
   Lightbox
   ==================================== */
.lightbox {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	z-index: 9999;
}

.lightbox-overlay {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background-color: rgba(0, 0, 0, 0.95);
}

.lightbox-content {
	position: relative;
	height: 100%;
	display: flex;
	align-items: center;
	justify-content: center;
	padding: var(--spacing-xl);
}

.lightbox-image {
	max-width: 100%;
	max-height: 90vh;
	object-fit: contain;
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
	position: absolute;
	background: none;
	border: none;
	color: var(--color-white);
	font-size: 3rem;
	cursor: pointer;
	padding: var(--spacing-sm);
	transition: opacity var(--transition);
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
	opacity: 0.6;
}

.lightbox-close {
	top: var(--spacing-sm);
	right: var(--spacing-sm);
}

.lightbox-prev {
	left: var(--spacing-sm);
	top: 50%;
	transform: translateY(-50%);
}

.lightbox-next {
	right: var(--spacing-sm);
	top: 50%;
	transform: translateY(-50%);
}

/* ====================================
   Footer
   ==================================== */
.footer {
	background-color: var(--color-black);
	color: var(--color-white);
	padding: var(--spacing-lg) 0 var(--spacing-md);
	margin-top: var(--spacing-xl);
}

.footer-content {
	max-width: var(--max-width);
	margin: 0 auto;
	padding: 0 var(--spacing-md);
	display: grid;
	grid-template-columns: 1fr;
	gap: var(--spacing-lg);
}

@media (min-width: 768px) {
	.footer-content {
		grid-template-columns: repeat(3, 1fr);
	}
}

.footer-title {
	font-size: 1rem;
	font-weight: 600;
	margin-bottom: var(--spacing-sm);
	text-transform: uppercase;
	letter-spacing: 1px;
}

.footer-text {
	font-size: 0.875rem;
	opacity: 0.8;
}

.footer a {
	color: var(--color-white);
}

.footer-legal {
	text-align: center;
	font-size: 0.75rem;
	opacity: 0.6;
}

@media (min-width: 768px) {
	.footer-legal {
		grid-column: 1 / -1;
	}
}

/* ====================================
   Error Page
   ==================================== */
.error-page {
	padding: var(--spacing-xl) 0;
	text-align: center;
}

.error-title {
	font-size: 8rem;
	font-weight: 300;
	opacity: 0.2;
}

.error-subtitle {
	margin-bottom: var(--spacing-md);
}

.btn-home {
	display: inline-block;
	margin-top: var(--spacing-md);
	padding: var(--spacing-sm) var(--spacing-md);
	border: 1px solid var(--color-black);
	text-transform: uppercase;
	letter-spacing: 1px;
	font-size: 0.875rem;
}

/* ====================================
   Utilities
   ==================================== */
.text-center {
	text-align: center;
}

.hidden {
	display: none !important;
}

/* Lazy loading placeholder */
img[loading="lazy"] {
	background-color: var(--color-gray-light);
}

/* ====================================
   Responsive Adjustments
   ==================================== */
@media (max-width: 767px) {
	:root {
		--spacing-lg: 32px;
		--spacing-xl: 48px;
	}

	h1 {
		font-size: 2rem;
	}

	.home-title {
		font-size: 2.5rem;
	}

	.header {
		padding: 16px 0;
	}

	.nav-logo {
		height: 32px;
	}

	.nav-list {
		gap: var(--spacing-sm);
		font-size: 11px;
	}

	.nav-list li {
		font-size: 11px;
	}

	.nav-list .lang-switch {
		border-left: none;
		padding-left: 0;
	}
}