:root {
    --bp-blue: #002b49;
    /* Deep Blueprint Blue */
    --bp-white: #ffffff;
    --bp-line: rgba(255, 255, 255, 0.3);
    --bp-accent: #ffb700;
    /* Construction Yellow */
    --bp-grid-major: rgba(255, 255, 255, 0.15);
    --bp-grid-minor: rgba(255, 255, 255, 0.05);
    --text-main: #e0e6ed;
    --text-muted: #a0aec0;
    --font-heading: Helvetica, Arial, "Nimbus Sans", "Liberation Sans", sans-serif;
    --font-body: Helvetica, Arial, "Nimbus Sans", "Liberation Sans", sans-serif;
}

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

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--bp-blue);
    /* Blueprint Grid Pattern */
    background-image:
        linear-gradient(var(--bp-grid-major) 1px, transparent 1px),
        linear-gradient(90deg, var(--bp-grid-major) 1px, transparent 1px),
        linear-gradient(var(--bp-grid-minor) 1px, transparent 1px),
        linear-gradient(90deg, var(--bp-grid-minor) 1px, transparent 1px);
    background-size: 100px 100px, 100px 100px, 20px 20px, 20px 20px;
    background-position: center center;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--bp-white);
    border-bottom: 2px solid var(--bp-accent);
    display: inline-block;
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}

p {
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

/* Header */
header {
    background: rgba(0, 43, 73, 0.95);
    border-bottom: 1px solid var(--bp-line);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bp-blue);
    border: 2px solid var(--bp-white);
    padding: 0.5rem;
}

.logo img {
    height: 40px;
    width: auto;
    display: block;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: var(--bp-white);
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--bp-accent);
    transition: width 0.3s;
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-links a:hover {
    color: var(--bp-accent);
}

.menu-toggle {
    display: none;
    background: none;
    border: 1px solid var(--bp-white);
    color: var(--bp-white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
}

/* Hero */
.hero {
    position: relative;
    /* Overlay the blueprint grid on top of the image slightly if needed, or just use image */
    background: linear-gradient(rgba(0, 43, 73, 0.8), rgba(0, 43, 73, 0.8)),
        url('images/hero-bg.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--bp-white);
    padding: 12rem 2rem 8rem;
    text-align: center;
    border-bottom: 1px solid var(--bp-line);
    overflow: hidden;
}

.hero::before {
    /* Architectural Frame Corner */
    content: '';
    position: absolute;
    top: 20px;
    left: 20px;
    width: 100px;
    height: 100px;
    border-top: 2px solid var(--bp-line);
    border-left: 2px solid var(--bp-line);
}

.hero::after {
    /* Architectural Frame Corner */
    content: '';
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 100px;
    height: 100px;
    border-bottom: 2px solid var(--bp-line);
    border-right: 2px solid var(--bp-line);
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    border-bottom: none;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    opacity: 0;
    animation: fadeSlideUp 0.8s ease-out 0.5s forwards;
}

@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero p {
    font-size: 1.3rem;
    opacity: 0;
    max-width: 700px;
    margin: 0 auto 3rem;
    font-family: var(--font-heading);
    animation: fadeSlideUp 0.8s ease-out 0.8s forwards;
}


.hero-btn {
    display: inline-block;
    background: transparent;
    color: var(--bp-accent);
    padding: 1rem 3rem;
    text-decoration: none;
    border: 2px solid var(--bp-accent);
    font-family: var(--font-heading);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
    z-index: 1;
    transition: color 0.3s;
}

.hero-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--bp-accent);
    z-index: -1;
    transition: transform 0.4s ease;
}

.hero-btn:hover {
    color: var(--bp-blue);
}

.hero-btn:hover::before {
    transform: translateX(100%);
}

/* Sections */
section {
    padding: 6rem 2rem;
    position: relative;
}

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

.section-title {
    text-align: center;
    margin-bottom: 5rem;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--bp-white);
    border-bottom: 2px solid var(--bp-accent);
}

.section-title p {
    color: var(--bp-accent);
    font-family: var(--font-heading);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 1rem;
}

/* About */
#about {
    background-color: rgba(0, 0, 0, 0.1);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    border: 1px dashed var(--bp-line);
    padding: 2rem;
    background: rgba(0, 43, 73, 0.5);
}

.about-content p {
    font-size: 1.1rem;
    color: var(--text-main);
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    margin-top: 4rem;
}

.stat {
    text-align: center;
    border: 1px solid var(--bp-line);
    padding: 2rem;
    background: rgba(0, 0, 0, 0.2);
    transition: transform 0.3s;
}

.stat:hover {
    transform: translateY(-5px);
    border-color: var(--bp-accent);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--bp-white);
    font-family: var(--font-heading);
    display: block;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--bp-accent);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-family: var(--font-heading);
}

/* Services */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.service-card {
    background: rgba(255, 255, 255, 0.95);
    padding: 2.5rem;
    border: 1px solid var(--bp-line);
    position: relative;
    transition: all 0.3s;
}

.service-card::before {
    /* Corner marks */
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 25px;
    height: 25px;
    border-top: 5px solid var(--bp-blue);
    border-left: 5px solid var(--bp-blue);
    opacity: 0;
    transition: opacity 0.3s;
}

.service-card::after {
    /* Corner marks */
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 25px;
    height: 25px;
    border-bottom: 5px solid var(--bp-blue);
    border-right: 5px solid var(--bp-blue);
    opacity: 0;
    transition: opacity 0.3s;
}

.service-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 1);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.service-card:hover::before,
.service-card:hover::after {
    opacity: 1;
}

.service-icon {
    width: 60px;
    height: 60px;
    background: var(--bp-blue);
    border: 2px solid var(--bp-blue);
    border-radius: 0;
    /* Square for blueprint look */
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.service-icon svg {
    fill: var(--bp-accent);
}

.service-card h3 {
    color: var(--bp-blue);
    margin-bottom: 1rem;
    font-size: 1.2rem;
    border-bottom: none;
}

.service-card p {
    color: #4a5568;
    font-size: 0.95rem;
}

/* Contact */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info {
    border: 1px solid var(--bp-line);
    padding: 2rem;
    background: rgba(0, 0, 0, 0.2);
}

.contact-info h3 {
    color: var(--bp-white);
    border-bottom: none;
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.contact-item-icon {
    width: 50px;
    height: 50px;
    background: transparent;
    border: 1px solid var(--bp-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bp-accent);
    flex-shrink: 0;
}

.contact-item-icon svg {
    fill: var(--bp-white);
}

.contact-item-text strong {
    display: block;
    color: var(--bp-accent);
    margin-bottom: 0.25rem;
    font-family: var(--font-heading);
}

.contact-item-text span {
    color: var(--text-main);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--bp-line);
    color: var(--bp-white);
    margin-bottom: 1rem;
    font-family: var(--font-heading);
    font-size: 1rem;
    transition: border-color 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--bp-accent);
    background: rgba(255, 255, 255, 0.1);
}

.contact-form textarea {
    height: 150px;
    resize: vertical;
}

.contact-form button {
    background: var(--bp-accent);
    color: var(--bp-blue);
    border: none;
    padding: 1rem 3rem;
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    font-family: var(--font-heading);
    cursor: pointer;
    width: 100%;
    transition: filter 0.3s;
}

.contact-form button:hover {
    filter: brightness(1.1);
}

/* Footer */
footer {
    background: #001f35;
    color: var(--text-muted);
    text-align: center;
    padding: 3rem 2rem;
    border-top: 1px solid var(--bp-line);
    font-family: var(--font-heading);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bp-blue);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        border-bottom: 1px solid var(--bp-accent);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
    }

    .nav-links.active {
        display: flex;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .stats {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}