:root {
    --nis2-blue: #1f4f8f;
    --nis2-cyan: #16a3b8;
    --nis2-green: #2f855a;
    --nis2-ink: #1b2430;
    --nis2-muted: #6b7280;
    --nis2-bg: #f4f7fb;
    --glass-bg: rgba(255, 255, 255, .72);
    --glass-bg-strong: rgba(255, 255, 255, .86);
    --glass-border: rgba(255, 255, 255, .68);
    --glass-shadow: 0 18px 45px rgba(15, 23, 42, .09);
    --glass-shadow-soft: 0 10px 28px rgba(15, 23, 42, .07);
}

body {
    font-family: "Roboto", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background:
        linear-gradient(135deg, rgba(31, 79, 143, .12), rgba(22, 163, 184, .08) 42%, rgba(47, 133, 90, .08)),
        linear-gradient(180deg, #f8fbff 0%, #edf4fa 100%);
    background-attachment: fixed;
    color: var(--nis2-ink);
}

.app-shell {
    min-height: 100vh;
}

.topbar {
    position: sticky;
    top: 0;
    z-index: 1020;
    background: rgba(255, 255, 255, .76);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 10px 26px rgba(15, 23, 42, .06);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.navbar-brand {
    color: #142338;
}

.sidebar {
    background: rgba(16, 35, 63, .82);
    border-right: 1px solid rgba(255, 255, 255, .16);
    box-shadow: inset -1px 0 0 rgba(255, 255, 255, .08), 12px 0 35px rgba(15, 23, 42, .08);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    min-height: calc(100vh - 57px);
}

.sidebar a {
    color: #dbeafe;
    display: block;
    padding: .75rem 1rem;
    border-radius: .5rem;
    text-decoration: none;
}

.sidebar a:hover,
.sidebar a.active {
    background: rgba(255, 255, 255, .16);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .12);
    color: #fff;
}

.card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    box-shadow: var(--glass-shadow);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.login-card {
    background: rgba(255, 255, 255, .74);
    border-color: rgba(255, 255, 255, .72);
    box-shadow: 0 22px 55px rgba(15, 23, 42, .14), inset 0 1px 0 rgba(255, 255, 255, .65);
}

.form-control,
.form-select {
    background-color: rgba(255, 255, 255, .78);
    border-color: rgba(148, 163, 184, .5);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .55);
}

.form-control:focus,
.form-select:focus {
    background-color: rgba(255, 255, 255, .92);
    border-color: rgba(22, 163, 184, .72);
    box-shadow: 0 0 0 .2rem rgba(22, 163, 184, .16);
}

.input-group-text {
    background: rgba(255, 255, 255, .7);
    border-color: rgba(148, 163, 184, .5);
}

.login-card .form-control,
.login-card .form-select {
    background: rgba(255, 255, 255, .86);
    border-color: rgba(148, 163, 184, .45);
}

.metric {
    border-left: 4px solid var(--nis2-cyan);
}

.question-option {
    background: rgba(255, 255, 255, .62);
    border: 1px solid rgba(148, 163, 184, .42);
    border-radius: 8px;
    padding: .75rem;
    cursor: pointer;
    transition: background .15s ease, border-color .15s ease, box-shadow .15s ease;
}

.question-option:has(input:checked) {
    border-color: var(--nis2-cyan);
    background: rgba(238, 251, 255, .82);
    box-shadow: 0 8px 22px rgba(22, 163, 184, .12);
}

.category-card-image,
.category-hero-image {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, .7);
    box-shadow: var(--glass-shadow-soft);
}

.category-lock {
    opacity: .55;
}

.table {
    --bs-table-bg: transparent;
    --bs-table-striped-bg: rgba(255, 255, 255, .34);
    --bs-table-hover-bg: rgba(255, 255, 255, .46);
    color: var(--nis2-ink);
}

.table td,
.table th {
    border-color: rgba(148, 163, 184, .25);
    vertical-align: middle;
}

.table thead th {
    background: rgba(255, 255, 255, .48);
    color: #253449;
    font-weight: 700;
}

.alert {
    border-color: rgba(255, 255, 255, .55);
    box-shadow: var(--glass-shadow-soft);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.accordion-item {
    background: rgba(255, 255, 255, .68);
    border-color: rgba(255, 255, 255, .65);
    box-shadow: var(--glass-shadow-soft);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.accordion-button {
    background: rgba(255, 255, 255, .56);
    color: var(--nis2-ink);
}

.accordion-button:not(.collapsed) {
    background: rgba(255, 255, 255, .78);
    color: #123a63;
    box-shadow: inset 0 -1px 0 rgba(148, 163, 184, .2);
}

.modal-content {
    background: rgba(255, 255, 255, .84);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    box-shadow: 0 24px 70px rgba(15, 23, 42, .18);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.modal-header,
.modal-footer {
    border-color: rgba(148, 163, 184, .24);
}

.btn {
    box-shadow: 0 8px 18px rgba(15, 23, 42, .08);
}

.btn-outline-secondary,
.btn-outline-primary,
.btn-outline-warning,
.btn-outline-danger {
    background: rgba(255, 255, 255, .52);
    border-color: rgba(148, 163, 184, .48);
}