h1:focus {
    outline: none;
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid #26b050;
}

.invalid {
    outline: 1px solid #e50000;
}

.validation-message {
    color: #e50000;
}

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }

.darker-border-checkbox.form-check-input {
    border-color: #929292;
}

/* ==================== Tetra Engineering / MudBlazor theme ==================== */

* { min-width: 0; }
img { max-width: 100%; }

html, body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: #fff;
}

.tetra-appbar {
    border-bottom: 1px solid #e5e7eb;
}
.nav-link { font-weight: 600; text-transform: none; }

.nav-desktop { display: flex; }
.nav-mobile-toggle { display: none; }
@media (max-width: 899px) {
    .nav-desktop { display: none !important; }
    .nav-mobile-toggle { display: inline-flex !important; }
}

/* Hero */
.hero-section {
    min-height: 72vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-size: cover;
    background-position: center;
    text-align: center;
    color: #fff;
    position: relative;
}
.hero-section::before {
    content: "";
    position: absolute; inset: 0;
    background: linear-gradient(180deg, rgba(2,6,23,.55), rgba(2,6,23,.65));
}
.hero-content { position: relative; z-index: 1; padding: 2rem 1rem; max-width: 720px; }

.section-soft { background: #f8fafc; }

.prose p { line-height: 1.8; margin-bottom: 1rem; text-align: justify; }

.service-card { cursor: pointer; transition: box-shadow .2s ease, transform .15s ease; height: 100%; }
.service-card:hover { transform: translateY(-2px); }
.service-card.selected { outline: 2px solid var(--mud-palette-primary); }

.project-card { height: 100%; display: flex; flex-direction: column; transition: box-shadow .2s ease, transform .15s ease; }
.project-card:hover { transform: translateY(-3px); }
.project-image-wrap { aspect-ratio: 4/3; overflow: hidden; background: #f1f5f9; position: relative; }
.project-image-wrap img { width: 100%; height: 100%; object-fit: cover; }

.team-photo {
    width: 140px; height: 140px; border-radius: 50%;
    object-fit: cover; margin: 0 auto;
}
.team-photo-fallback {
    width: 140px; height: 140px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    background: var(--mud-palette-primary); color: #fff; font-size: 2rem; font-weight: 700;
    margin: 0 auto;
}

.gallery-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.25rem; }
.gallery-grid img {
    width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: .6rem;
    border: 1px solid #e5e7eb;
}

/* Footer */
.tetra-footer {
    background: linear-gradient(to bottom, #0f172a, #020617);
    color: #fff;
}
.footer-underline { width: 3rem; height: 3px; background: var(--mud-palette-primary); border-radius: 2px; }
.footer-underline-sm { width: 2.25rem; }
.footer-link { color: #cbd5e1 !important; }
.footer-link:hover { color: #fff !important; }

.page-header-section {
    background: #f8fafc;
    padding: 3.5rem 0;
    text-align: center;
    border-bottom: 1px solid #e5e7eb;
}