:root {
    --ui-bg: #f3f6fb;
    --ui-surface: #ffffff;
    --ui-surface-muted: #f7f9fc;
    --ui-border: #d9e2ef;
    --ui-text: #10233f;
    --ui-text-muted: #53657f;
    --ui-accent: #0b7285;
    --ui-accent-strong: #095c6a;
    --ui-success: #1f8a4c;
    --ui-danger: #c0352b;
    --ui-shadow: 0 12px 32px rgba(18, 42, 66, 0.08);
    --ui-radius: 14px;
    --app-topbar-offset: 76px;
}

html[data-bs-theme="dark"] {
    --ui-bg: #0e1520;
    --ui-surface: #142033;
    --ui-surface-muted: #1a293f;
    --ui-border: #2a3f5f;
    --ui-text: #e7eef8;
    --ui-text-muted: #a9bad1;
    --ui-accent: #2aa7bd;
    --ui-accent-strong: #49bfd4;
    --ui-success: #4bc978;
    --ui-danger: #eb675d;
    --ui-shadow: 0 14px 32px rgba(0, 0, 0, 0.35);
}

[x-cloak] {
    display: none !important;
}

.htmx-indicator {
    opacity: 0;
    transition: opacity 0.15s ease-in-out;
}

.htmx-request .htmx-indicator,
.htmx-request.htmx-indicator {
    opacity: 1;
}

body.app-body {
    margin: 0;
    min-height: 100vh;
    font-family: "Manrope", "Segoe UI", sans-serif;
    color: var(--ui-text);
    background:
        radial-gradient(circle at 8% 10%, rgba(11, 114, 133, 0.10), transparent 42%),
        radial-gradient(circle at 86% 0%, rgba(31, 138, 76, 0.08), transparent 38%),
        var(--ui-bg);
}

.app-shell {
    display: grid;
    grid-template-columns: 280px 1fr;
    min-height: 100vh;
}

.app-sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
    border-right: 1px solid var(--ui-border);
    background: linear-gradient(180deg, var(--ui-surface), var(--ui-surface-muted));
}

.app-sidebar-inner {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    height: 100%;
    padding: 1.2rem 1rem;
}

.app-nav .nav-link {
    border-radius: 10px;
    color: var(--ui-text);
    font-weight: 600;
}

.app-nav .nav-link.text-white {
    color: var(--ui-text) !important;
}

.app-nav .nav-link:hover,
.app-nav .nav-link.active {
    background: color-mix(in srgb, var(--ui-accent) 18%, transparent);
    color: var(--ui-text);
}

.app-nav .badge {
    background: color-mix(in srgb, var(--ui-accent) 20%, transparent);
    color: var(--ui-text);
}

.app-footer {
    margin-top: auto;
    color: var(--ui-text-muted);
}

.app-footer a {
    color: var(--ui-accent);
    text-decoration: none;
}

.app-content {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-width: 0;
}

#appToastStack {
    top: var(--app-topbar-offset) !important;
    z-index: 1060 !important;
}

.app-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--ui-border);
    background: color-mix(in srgb, var(--ui-surface) 90%, transparent);
    backdrop-filter: blur(6px);
    position: sticky;
    top: 0;
    z-index: 1020;
}

.app-topbar-title {
    flex: 1;
    text-align: center;
    font-weight: 700;
    letter-spacing: 0.01em;
}

.app-main {
    padding: 1.25rem;
}

.loading-panel {
    border: 1px solid var(--ui-border);
    border-radius: 12px;
    padding: 0.9rem 1rem;
    color: var(--ui-text-muted);
    background: linear-gradient(90deg, color-mix(in srgb, var(--ui-surface-muted) 84%, transparent) 25%, color-mix(in srgb, var(--ui-surface) 92%, transparent) 50%, color-mix(in srgb, var(--ui-surface-muted) 84%, transparent) 75%);
    background-size: 220% 100%;
    animation: app-loading 1.25s linear infinite;
}

@keyframes app-loading {
    from {
        background-position: 200% 0;
    }
    to {
        background-position: -200% 0;
    }
}

.card,
.table-responsive,
.modal-content,
.toast,
.alert {
    border-radius: var(--ui-radius) !important;
    border-color: var(--ui-border) !important;
    box-shadow: var(--ui-shadow);
}

.table {
    --bs-table-bg: transparent;
    --bs-table-striped-bg: color-mix(in srgb, var(--ui-surface) 75%, var(--ui-bg));
    --bs-table-hover-bg: color-mix(in srgb, var(--ui-accent) 8%, transparent);
    color: var(--ui-text);
}

.people-table td:nth-child(3) {
    min-width: 7.5rem;
}

.people-table .badge {
    font-weight: 600;
}

.admin-edit-table {
    table-layout: fixed;
}

.admin-edit-table .col-person {
    width: 48%;
}

.admin-edit-table .col-role {
    width: 18%;
}

.admin-edit-table .col-last-email {
    width: 18%;
}

.admin-edit-table .col-status {
    width: 16%;
}

.admin-edit-table td,
.admin-edit-table th {
    vertical-align: middle;
}

.form-control,
.form-select,
.btn {
    border-radius: 12px;
}

.btn.is-busy {
    cursor: wait;
}

.empty-state {
    border: 1px dashed var(--ui-border);
    border-radius: var(--ui-radius);
    background: color-mix(in srgb, var(--ui-surface) 90%, transparent);
    padding: 2rem 1.25rem;
    text-align: center;
    color: var(--ui-text-muted);
}

.empty-state-icon {
    font-size: 2rem;
    color: var(--ui-accent);
    margin-bottom: 0.5rem;
}

.empty-state-title {
    color: var(--ui-text);
}

.table-filter-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
    margin-bottom: 0.75rem;
}

.table-filter-presets-input {
    max-width: 280px;
}

.filter-chip-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.filter-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    border: 1px solid var(--ui-border);
    border-radius: 999px;
    background: color-mix(in srgb, var(--ui-surface) 90%, transparent);
    color: var(--ui-text);
    padding: 0.25rem 0.65rem;
    font-size: 0.875rem;
}

.filter-chip button {
    border: 0;
    background: transparent;
    color: var(--ui-text-muted);
    line-height: 1;
    padding: 0;
}

.command-palette-list {
    max-height: 46vh;
    overflow: auto;
}

.command-palette-item.active {
    background: color-mix(in srgb, var(--ui-accent) 12%, transparent);
}

.highlight {
    outline: 2px solid color-mix(in srgb, var(--ui-accent) 45%, transparent);
    outline-offset: 1px;
}

.btn-primary {
    --bs-btn-bg: var(--ui-accent);
    --bs-btn-border-color: var(--ui-accent);
    --bs-btn-hover-bg: var(--ui-accent-strong);
    --bs-btn-hover-border-color: var(--ui-accent-strong);
    --bs-btn-active-bg: var(--ui-accent-strong);
    --bs-btn-active-border-color: var(--ui-accent-strong);
}

.status-badge.pending {
    background-color: #f7ce4f;
}

.status-badge.sent {
    background-color: var(--ui-success);
}

.status-badge.failed {
    background-color: var(--ui-danger);
}

.app-overlay {
    display: none;
}

@media (max-width: 991.98px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .app-sidebar {
        position: fixed;
        top: 0;
        left: 0;
        bottom: 0;
        width: min(82vw, 320px);
        height: auto;
        transform: translateX(-105%);
        transition: transform 0.2s ease;
        z-index: 1050;
    }

    .app-sidebar.is-open {
        transform: translateX(0);
    }

    .app-overlay {
        position: fixed;
        inset: 0;
        background: rgba(5, 16, 30, 0.45);
        z-index: 1040;
        display: block;
    }

    .app-main {
        padding: 1rem;
    }
}

@media (max-width: 767.98px) {
    table.mobile-stack thead {
        display: none;
    }

    table.mobile-stack,
    table.mobile-stack tbody,
    table.mobile-stack tr,
    table.mobile-stack td,
    table.mobile-stack th[scope="row"] {
        display: block;
        width: 100%;
    }

    table.mobile-stack tr {
        border: 1px solid var(--ui-border);
        border-radius: 12px;
        margin-bottom: 0.85rem;
        padding: 0.5rem 0.75rem;
        background: color-mix(in srgb, var(--ui-surface) 92%, transparent);
        box-shadow: var(--ui-shadow);
    }

    table.mobile-stack td,
    table.mobile-stack th[scope="row"] {
        border: 0 !important;
        padding: 0.45rem 0.1rem !important;
        text-align: left !important;
    }

    table.mobile-stack td::before,
    table.mobile-stack th[scope="row"]::before {
        content: attr(data-label);
        display: block;
        font-size: 0.74rem;
        font-weight: 700;
        color: var(--ui-text-muted);
        margin-bottom: 0.18rem;
        letter-spacing: 0.01em;
        text-transform: uppercase;
    }

    table.mobile-stack td[data-label="Actions"] .btn-group,
    table.mobile-stack td[data-label="Actions"] {
        display: flex;
        flex-wrap: wrap;
        gap: 0.35rem;
    }
}

/* SurveyJS bridge: keeps survey pages visually consistent with app theme. */
.sd-root-modern {
    --sjs-font-family: "Manrope", "Segoe UI", sans-serif;
    --sjs-general-backcolor: var(--ui-surface);
    --sjs-general-forecolor: var(--ui-text);
    --sjs-primary-backcolor: var(--ui-accent);
    --sjs-primary-forecolor: #ffffff;
    --sjs-primary-backcolor-dark: var(--ui-accent-strong);
    --sjs-secondary-backcolor: color-mix(in srgb, var(--ui-accent) 12%, transparent);
    --sjs-border-default: var(--ui-border);
    --sjs-shadow-small: var(--ui-shadow);
}