:root {
    --bg: #f5f7fb;
    --surface: #ffffff;
    --ink: #172033;
    --muted: #5d6b82;
    --primary: #113f67;
    --primary-dark: #0a2a47;
    --accent: #f59e0b;
    --border: #dbe3ef;
    --shadow: 0 18px 45px rgba(17, 63, 103, 0.12);
    --radius: 18px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--ink);
    background: var(--bg);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main { flex: 1; }

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

a { color: inherit; }

.container {
    width: min(1120px, 92%);
    margin: 0 auto;
}

.skip-link {
    position: absolute;
    left: -999px;
    top: 0;
    background: var(--primary);
    color: #fff;
    padding: .75rem 1rem;
    z-index: 999;
}

.skip-link:focus { left: 1rem; top: 1rem; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(8px);
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    padding: 1rem 0;
}

.logo {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    line-height: 1.1;
}

.logo strong {
    color: var(--primary);
    font-size: 1.15rem;
    letter-spacing: .03em;
}

.logo span {
    color: var(--muted);
    font-size: .82rem;
}

.nav-toggle {
    display: none;
    border: 1px solid var(--border);
    background: var(--surface);
    border-radius: 12px;
    padding: .6rem .8rem;
    font-weight: 700;
    cursor: pointer;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: .55rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-links a {
    text-decoration: none;
    font-weight: 700;
    color: var(--ink);
    padding: .55rem .75rem;
    border-radius: 999px;
}

.nav-links a:hover,
.nav-links a.active {
    background: #eaf1f8;
    color: var(--primary);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .45rem;
    border: none;
    border-radius: 999px;
    padding: .85rem 1.2rem;
    background: var(--primary);
    color: #fff;
    text-decoration: none;
    font-weight: 800;
    box-shadow: 0 12px 25px rgba(17, 63, 103, .22);
    cursor: pointer;
}

.btn:hover { background: var(--primary-dark); }

.btn.secondary {
    background: #fff;
    color: var(--primary);
    border: 1px solid var(--border);
    box-shadow: none;
}

.hero {
    padding: 5rem 0 3.5rem;
    background:
        linear-gradient(90deg, rgba(10, 42, 71, .92), rgba(10, 42, 71, .64)),
        url('../assets/images/hero-roof.jpg') center/cover;
    color: #fff;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.4fr .8fr;
    gap: 2rem;
    align-items: center;
}

.eyebrow {
    color: var(--accent);
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: .08em;
    font-size: .86rem;
    margin: 0 0 .7rem;
}

.hero h1 {
    margin: 0;
    font-size: clamp(2.1rem, 6vw, 4.5rem);
    line-height: 1.05;
    max-width: 11ch;
}

.hero p {
    font-size: 1.1rem;
    max-width: 64ch;
    color: #e8eef6;
}

.hero-actions,
.cta-row {
    display: flex;
    gap: .85rem;
    flex-wrap: wrap;
    margin-top: 1.4rem;
}

.hero-card {
    background: rgba(255, 255, 255, .96);
    color: var(--ink);
    border-radius: var(--radius);
    padding: 1.4rem;
    box-shadow: var(--shadow);
}

.hero-card ul {
    margin: .75rem 0 0;
    padding-left: 1.1rem;
}

.section { padding: 4rem 0; }
.section.light { background: #fff; }

.section-header {
    max-width: 720px;
    margin-bottom: 2rem;
}

.section-header h2 {
    margin: 0 0 .65rem;
    font-size: clamp(1.7rem, 3vw, 2.5rem);
}

.section-header p { color: var(--muted); margin: 0; }

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.card-content { padding: 1.2rem; }
.card h3 { margin: 0 0 .45rem; color: var(--primary); }
.card p { color: var(--muted); margin: 0; }
.card img { aspect-ratio: 16 / 10; object-fit: cover; }

.split {
    display: grid;
    grid-template-columns: .9fr 1.1fr;
    gap: 2rem;
    align-items: center;
}

.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.tick-list { list-style: none; margin: 1rem 0 0; padding: 0; }
.tick-list li {
    padding-left: 1.8rem;
    margin: .7rem 0;
    position: relative;
}
.tick-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 900;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.2rem;
}

.project-card {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    min-height: 320px;
    background: var(--primary);
    box-shadow: var(--shadow);
}

.project-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    inset: 0;
}

.project-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 20%, rgba(10,42,71,.9));
}

.project-card div {
    position: absolute;
    left: 1.2rem;
    right: 1.2rem;
    bottom: 1.2rem;
    color: #fff;
    z-index: 1;
}

.project-card h3 { margin: 0 0 .3rem; }
.project-card p { margin: 0; color: #e7eef7; }

.contact-grid {
    display: grid;
    grid-template-columns: .9fr 1.1fr;
    gap: 1.2rem;
}

.contact-card p { margin: .3rem 0; }
.contact-card a { color: var(--primary); font-weight: 700; }

.form {
    display: grid;
    gap: 1rem;
}

.form label { font-weight: 800; }
.form input, .form textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: .9rem 1rem;
    font: inherit;
}
.form textarea { min-height: 140px; resize: vertical; }
.form small { color: var(--muted); }

.notice {
    padding: .85rem 1rem;
    border-radius: 12px;
    background: #eaf7ef;
    color: #166534;
    display: none;
    font-weight: 700;
}

.cta {
    background: var(--primary);
    color: #fff;
    border-radius: 28px;
    padding: 2rem;
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    align-items: center;
}
.cta p { color: #e7eef7; margin: .3rem 0 0; }

.site-footer {
    background: var(--primary-dark);
    color: #fff;
    padding: 2rem 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr .8fr .8fr;
    gap: 1rem;
}
.footer-grid a { color: #fff; }
.footer-grid p { color: #cbd5e1; }
.footer-bottom {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255,255,255,.15);
    color: #cbd5e1;
    font-size: .9rem;
}

@media (max-width: 900px) {
    .hero-grid, .split, .contact-grid { grid-template-columns: 1fr; }
    .card-grid { grid-template-columns: repeat(2, 1fr); }
    .project-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
    .nav { align-items: flex-start; }
    .nav-toggle { display: inline-flex; }
    .nav-links {
        display: none;
        position: absolute;
        left: 4%;
        right: 4%;
        top: 74px;
        background: #fff;
        border: 1px solid var(--border);
        border-radius: 16px;
        padding: .75rem;
        box-shadow: var(--shadow);
        flex-direction: column;
        align-items: stretch;
    }
    .nav-links.open { display: flex; }
    .nav-links a { display: block; text-align: center; }
    .hero { padding: 3.2rem 0; }
    .card-grid { grid-template-columns: 1fr; }
    .cta { flex-direction: column; align-items: flex-start; }
}


.hidden-field {
    display: none;
}


/* Maintenance page spacing */
.section.light:first-child {
    padding-top: 4rem;
}