:root {
    --concrete: #95a5a6;
    --dark-blue: #2c3e50;
    --blueprint-blue: #3498db;
    --white: #ffffff;
    --light-grey: #ecf0f1;
    --text-color: #333;
    
    --font-head: 'Oswald', sans-serif;
    --font-body: 'Roboto', sans-serif;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--white);
    color: var(--text-color);
    line-height: 1.5;
}

.container { width: 90%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
a { text-decoration: none; color: inherit; transition: 0.3s; }

/* Header */
.arch-header { padding: 25px 0; border-bottom: 2px solid var(--dark-blue); position: sticky; top: 0; background: rgba(255,255,255,0.98); z-index: 1000; }
.header-flex { display: flex; justify-content: space-between; align-items: center; }

.logo { font-family: var(--font-head); font-size: 2rem; font-weight: 700; color: var(--dark-blue); letter-spacing: 2px; }
.blue { color: var(--blueprint-blue); }

.arch-nav ul { display: flex; gap: 30px; list-style: none; align-items: center; }
.arch-nav a { font-family: var(--font-head); text-transform: uppercase; font-size: 1rem; color: var(--dark-blue); letter-spacing: 1px; }
.arch-nav a:hover, .arch-nav a.active { color: var(--blueprint-blue); text-decoration: underline; }

.btn-outline { border: 2px solid var(--dark-blue); padding: 8px 25px; font-weight: 500; font-family: var(--font-head); text-transform: uppercase; }
.btn-outline:hover { background-color: var(--dark-blue); color: var(--white); }

/* Mobile Menu */
.mobile-toggle { display: none; background: none; border: 2px solid var(--dark-blue); color: var(--dark-blue); font-size: 1.2rem; cursor: pointer; font-weight: bold; }
.mobile-menu { position: fixed; top: 0; right: -100%; width: 250px; height: 100%; background: var(--dark-blue); z-index: 2000; padding: 40px; display: flex; flex-direction: column; transition: 0.3s; border-left: 5px solid var(--blueprint-blue); }
.mobile-menu.active { right: 0; }
.close-menu { align-self: flex-end; color: var(--white); background: none; border: none; font-size: 1.5rem; cursor: pointer; margin-bottom: 20px; }
.mobile-menu a { padding: 15px 0; border-bottom: 1px dashed var(--concrete); color: var(--white); font-family: var(--font-head); letter-spacing: 1px; }

/* Hero */
.hero-arch {
    height: 600px; background-size: cover; background-position: center; position: relative;
}
.hero-overlay {
    width: 100%; height: 100%; background: rgba(44, 62, 80, 0.8); display: flex; align-items: center; justify-content: center;
    background-image: linear-gradient(0deg, transparent 24%, rgba(255, 255, 255, .05) 25%, rgba(255, 255, 255, .05) 26%, transparent 27%, transparent 74%, rgba(255, 255, 255, .05) 75%, rgba(255, 255, 255, .05) 76%, transparent 77%, transparent), linear-gradient(90deg, transparent 24%, rgba(255, 255, 255, .05) 25%, rgba(255, 255, 255, .05) 26%, transparent 27%, transparent 74%, rgba(255, 255, 255, .05) 75%, rgba(255, 255, 255, .05) 76%, transparent 77%, transparent);
    background-size: 50px 50px;
}
.hero-content { text-align: center; color: var(--white); max-width: 800px; padding: 20px; border: 4px solid var(--white); }
.blueprint-tag { font-family: var(--font-head); background-color: var(--blueprint-blue); padding: 5px 15px; font-size: 0.9rem; text-transform: uppercase; letter-spacing: 2px; display: inline-block; margin-bottom: 20px; }
.hero-content h1 { font-family: var(--font-head); font-size: 3.5rem; line-height: 1; margin-bottom: 20px; letter-spacing: 3px; }
.hero-content p { font-size: 1.2rem; margin-bottom: 30px; font-weight: 300; }

.hero-actions a { margin: 0 10px; padding: 12px 30px; font-family: var(--font-head); text-transform: uppercase; letter-spacing: 1px; display: inline-block; }
.btn-primary { background-color: var(--white); color: var(--dark-blue); font-weight: bold; }
.btn-primary:hover { background-color: var(--concrete); }
.btn-secondary { border: 2px solid var(--white); color: var(--white); }
.btn-secondary:hover { background-color: var(--white); color: var(--dark-blue); }

/* Services */
.section-padding { padding: 80px 0; }
.section-title { text-align: center; margin-bottom: 60px; }
.section-title h2 { font-family: var(--font-head); font-size: 2.5rem; color: var(--dark-blue); text-transform: uppercase; margin-bottom: 15px; letter-spacing: 2px; }
.ruler-line { width: 100%; max-width: 200px; height: 2px; background-color: var(--blueprint-blue); margin: 0 auto; position: relative; }
.ruler-line::after { content: ''; position: absolute; top: -4px; left: 50%; transform: translateX(-50%); width: 10px; height: 10px; background-color: var(--dark-blue); }

.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.arch-card { border: 1px solid var(--concrete); padding: 40px; background-color: var(--light-grey); position: relative; transition: 0.3s; }
.arch-card:hover { background-color: var(--dark-blue); color: var(--white); border-color: var(--dark-blue); }
.num { font-family: var(--font-head); font-size: 3rem; color: var(--blueprint-blue); opacity: 0.5; position: absolute; top: 10px; right: 20px; }
.arch-card h3 { font-family: var(--font-head); font-size: 1.5rem; margin-bottom: 15px; text-transform: uppercase; }
.arch-card p { font-size: 0.95rem; }

/* About */
.page-header { background-color: var(--dark-blue); color: var(--white); padding: 60px 0; text-align: center; border-bottom: 5px solid var(--blueprint-blue); }
.page-header h1 { font-family: var(--font-head); font-size: 3rem; letter-spacing: 5px; text-transform: uppercase; }

.about-grid { display: flex; gap: 60px; align-items: center; }
.text-block { flex: 1; }
.text-block h2 { font-family: var(--font-head); font-size: 2rem; color: var(--dark-blue); margin-bottom: 20px; text-transform: uppercase; }
.spec-list { list-style: none; margin-top: 30px; font-family: var(--font-head); letter-spacing: 1px; }
.spec-list li { padding: 10px; border-bottom: 1px solid var(--concrete); }
.spec-list li::before { content: "■"; color: var(--blueprint-blue); margin-right: 15px; }
.img-block { flex: 1; border: 10px solid var(--light-grey); }
.img-block img { width: 100%; display: block; filter: grayscale(100%); transition: 0.5s; }
.img-block img:hover { filter: grayscale(0%); }

/* Reviews */
.reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.review-item { background: var(--white); border: 2px solid var(--concrete); padding: 30px; }
.review-item h3 { font-family: var(--font-head); color: var(--blueprint-blue); margin-bottom: 15px; text-transform: uppercase; }
.review-item p { font-style: italic; color: #555; margin-bottom: 20px; }
.client-info strong { display: block; color: var(--dark-blue); font-family: var(--font-head); }

/* Contact Form */
.contact-struct { display: flex; border: 1px solid var(--concrete); }
.info-column { flex: 1; background-color: var(--dark-blue); color: var(--white); padding: 50px; }
.info-column h2 { font-family: var(--font-head); color: var(--blueprint-blue); margin-bottom: 20px; }
.contact-data p { margin-bottom: 10px; border-bottom: 1px solid rgba(255,255,255,0.1); padding-bottom: 10px; }

.blueprint-form { flex: 1.5; padding: 50px; background-color: var(--light-grey); background-image: linear-gradient(var(--white) 2px, transparent 2px), linear-gradient(90deg, var(--white) 2px, transparent 2px); background-size: 40px 40px; }
.row { display: flex; gap: 20px; margin-bottom: 20px; }
.col { flex: 1; }
.col label { display: block; font-family: var(--font-head); text-transform: uppercase; font-size: 0.9rem; margin-bottom: 5px; }
.col input, .col select, .col textarea { width: 100%; padding: 10px; border: 2px solid var(--dark-blue); background: var(--white); font-family: 'Courier New', monospace; }
.submit-btn { width: 100%; background-color: var(--blueprint-blue); color: var(--white); border: none; padding: 15px; font-family: var(--font-head); font-weight: bold; text-transform: uppercase; letter-spacing: 2px; cursor: pointer; transition: 0.3s; }
.submit-btn:hover { background-color: var(--dark-blue); }

/* Legal */
.legal-doc { max-width: 800px; margin: 0 auto; background: var(--white); padding: 50px; border: 1px solid var(--concrete); }
.legal-doc h1 { font-family: var(--font-head); text-align: center; color: var(--dark-blue); }
.legal-doc h3 { font-family: var(--font-head); color: var(--blueprint-blue); margin-top: 30px; margin-bottom: 10px; }

/* Footer */
.arch-footer { background-color: var(--dark-blue); color: var(--concrete); padding: 40px 0; text-align: center; margin-top: auto; }
.f-brand { font-family: var(--font-head); font-size: 1.5rem; color: var(--white); letter-spacing: 3px; margin-bottom: 10px; }
.f-links a { color: var(--concrete); margin: 0 15px; font-family: var(--font-head); text-transform: uppercase; font-size: 0.9rem; }
.f-links a:hover { color: var(--blueprint-blue); }
.copyright { margin-top: 20px; font-size: 0.8rem; }

@media (max-width: 900px) {
    .arch-nav { display: none; }
    .mobile-toggle { display: block; }
    .hero-content h1 { font-size: 2.5rem; }
    .grid-3, .about-grid, .reviews-grid, .contact-struct { grid-template-columns: 1fr; flex-direction: column; }
    .row { flex-direction: column; gap: 0; }
    .col { margin-bottom: 15px; }
}