:root {
    --eluva-bg: #ffffff;
    --eluva-bg-soft: #f6f8fc;
    --eluva-surface: rgba(255, 255, 255, 0.92);
    --eluva-border: rgba(3, 22, 52, 0.12);
    --eluva-text: #000000;
    --eluva-muted: #5b6577;
    --eluva-primary: #031634;
    --eluva-secondary: #5b6577;
}

html {
    scroll-behavior: smooth;
}

body.app-shell {
    font-family: 'Inter', sans-serif;
    background: #ffffff;
    color: var(--eluva-text);
}

body.app-shell main {
    padding-top: 5.75rem;
}

a {
    text-decoration: none;
}

.navbar {
    transition: background-color 0.25s ease, box-shadow 0.25s ease, backdrop-filter 0.25s ease;
    padding: 1rem 0;
    background: rgba(3, 22, 52, 0.92);
    backdrop-filter: blur(12px);
    box-shadow: 0 8px 24px rgba(3, 22, 52, 0.12);
}

.navbar .nav-link {
    color: #ffffff;
    font-size: calc(1rem + 2px);
    font-weight: 500;
    transition: color 0.2s ease, opacity 0.2s ease;
}

.navbar .nav-link:hover,
.navbar .nav-link:focus {
    color: #ffffff;
    opacity: 0.8;
}

.navbar.is-scrolled {
    background: rgba(3, 22, 52, 0.74);
    backdrop-filter: blur(16px);
    box-shadow: 0 10px 26px rgba(3, 22, 52, 0.18);
}

.brand-logo {
    display: block;
    width: clamp(150px, 16vw, 230px);
    height: auto;
    max-height: 54px;
    object-fit: contain;
    filter: none;
}

.brand-link {
    padding: 0.25rem 0;
}

.btn-primary {
    background: var(--eluva-primary);
    border: none;
    color: #ffffff;
    box-shadow: 0 12px 30px rgba(3, 22, 52, 0.18);
    opacity: 0.92;
}

.btn-primary:hover,
.btn-primary:focus {
    background: #000000;
    color: #ffffff;
    box-shadow: 0 14px 34px rgba(3, 22, 52, 0.22);
}

.btn-outline-light {
    color: var(--eluva-primary);
    border-color: rgba(3, 22, 52, 0.24);
    background: rgba(3, 22, 52, 0.05);
    opacity: 0.9;
}

.btn-outline-light:hover,
.btn-outline-light:focus {
    background: rgba(3, 22, 52, 0.12);
    border-color: rgba(3, 22, 52, 0.5);
    color: #ffffff;
    opacity: 1;
}

.navbar .btn {
    box-shadow: none;
}

.form-control,
.form-select {
    background: #ffffff;
    border: 1px solid var(--eluva-border);
    color: var(--eluva-text);
    padding: 0.9rem 1rem;
}

.form-control:focus {
    background: #ffffff;
    border-color: var(--eluva-primary);
    color: var(--eluva-text);
    box-shadow: 0 0 0 0.2rem rgba(3, 22, 52, 0.12);
}

.form-label {
    color: var(--eluva-muted);
}

.site-footer {
    border-top: 1px solid var(--eluva-border);
    background: var(--eluva-primary);
    color: #ffffff;
}

.site-footer h5 {
    color: #ffffff;
}

.site-footer p,
.site-footer small {
    color: rgba(255, 255, 255, 0.82) !important;
}

.btn-scroll-top {
    position: fixed;
    right: 1.25rem;
    bottom: 1.25rem;
    width: 48px;
    height: 48px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
    z-index: 1040;
}

.btn-scroll-top.visible {
    opacity: 1;
    pointer-events: auto;
}

@media (max-width: 991.98px) {
    .brand-logo {
        width: clamp(130px, 42vw, 180px);
        max-height: 44px;
    }

    body.app-shell main {
        padding-top: 5rem;
    }
}