:root {
    --forum-bg: #f3f6ff;
    --forum-surface: #ffffff;
    --forum-text: #0f172a;
    --forum-muted: #64748b;
    --forum-primary: #4f46e5;
    --forum-primary-strong: #4338ca;
    --forum-border: #e2e8f0;
}

body.app-page {
    background: radial-gradient(circle at top, #e9edff, var(--forum-bg) 45%);
    color: var(--forum-text);
    font-family: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
}

.app-shell {
    max-width: 1100px;
}

.app-navbar {
    background: rgba(15, 23, 42, 0.94) !important;
    backdrop-filter: blur(6px);
}

.app-navbar .container {
    row-gap: 0.6rem;
}

.app-navbar .ms-auto {
    flex-wrap: wrap;
    justify-content: flex-end;
}

.app-navbar .btn {
    border-radius: 999px;
}

.app-title {
    font-size: 1.25rem;
    font-weight: 700;
}

.card {
    border: 1px solid var(--forum-border);
    border-radius: 1rem;
    box-shadow: 0 10px 25px rgba(15, 23, 42, 0.07);
}

.card-header {
    background-color: #f8faff;
    border-bottom-color: var(--forum-border);
    font-weight: 600;
}

.list-group-item {
    border-color: var(--forum-border);
}

.list-group-item.active {
    background: var(--forum-primary);
    border-color: var(--forum-primary);
}

.btn-primary,
.btn-success {
    border-radius: 0.8rem;
}

.btn-primary {
    background: var(--forum-primary);
    border-color: var(--forum-primary);
}

.btn-primary:hover,
.btn-primary:focus {
    background: var(--forum-primary-strong);
    border-color: var(--forum-primary-strong);
}

.form-control,
.form-select {
    border-radius: 0.8rem;
    border-color: #dbe4f0;
    padding: 0.65rem 0.85rem;
}

.forum-meta {
    color: var(--forum-muted);
}

.auth-wrap {
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.auth-card {
    border-radius: 1.15rem;
}

@media (max-width: 575.98px) {
    .app-navbar .btn,
    .app-navbar .text-white.small {
        width: 100%;
        text-align: center;
    }

    .app-navbar .btn {
        padding-top: 0.45rem;
        padding-bottom: 0.45rem;
    }

    .table-responsive {
        border: 1px solid var(--forum-border);
        border-radius: 1rem;
        overflow: hidden;
    }
}