/* =========================================================================
   NuActionGUI — minimal refresh (layered on top of Bootstrap)
   Typography, palette, spacing, nav states, code blocks. Layout unchanged.
   ========================================================================= */

:root {
    --nag-blue-900: #002b55;
    --nag-blue-700: #003f7d;
    --nag-blue-500: #005fa3;
    --nag-ink:      #21303d;
    --nag-muted:    #5b6b7b;
    --nag-border:   #e3e8ef;
    --nag-surface:  #f6f8fb;
    --nag-surface-2:#eef2f7;
}

/* ---- Typography ------------------------------------------------------- */
body {
    font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    color: var(--nag-ink);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

#content-panel h2 {
    font-weight: 700;
    color: var(--nag-blue-900);
    padding-bottom: 0.35em;
    margin-bottom: 0.75em;
    border-bottom: 1px solid var(--nag-surface-2);
}
#content-panel h4,
#content-panel h5,
#content-panel h6 { font-weight: 600; color: var(--nag-blue-700); }

#content-panel a { color: var(--nag-blue-500); text-decoration: none; }
#content-panel a:hover { text-decoration: underline; }

#content-panel code {
    background: var(--nag-surface-2);
    color: var(--nag-blue-700);
    padding: 0.1em 0.35em;
    border-radius: 0.25em;
    font-size: 0.9em;
}

#content-panel ul li,
#content-panel ol li { margin-bottom: 0.35em; }

/* ---- Header ---------------------------------------------------------- */
.site-header {
    background: linear-gradient(120deg, var(--nag-blue-900), var(--nag-blue-500));
    color: #fff;
    padding: 2.75rem 0;
    margin-bottom: 2.5rem;
}
.site-header h1 { font-weight: 700; letter-spacing: -0.01em; }
.site-header .lead { color: rgba(255, 255, 255, 0.88); margin-bottom: 0; }

/* ---- Sidebar navigation ---------------------------------------------- */
.sidebar {
    background: var(--nag-surface);
    border: 1px solid var(--nag-border);
    border-radius: 0.5rem;
    padding: 1rem;
    position: sticky;
    top: 1.5rem;
}
.sidebar ul { list-style: none; padding: 0; margin: 0; }
.sidebar > ul > li { margin-bottom: 0.25rem; }
.sidebar .nav-sub { padding-left: 0.85em; margin: 0.25em 0 0.4em; }
.sidebar .nav-sub li { margin-bottom: 0.15em; }

.nav-link-custom {
    display: block;
    padding: 0.5em 0.85em;
    border-radius: 0.4em;
    color: var(--nag-blue-900);
    text-decoration: none;
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.nav-link-custom:hover { background: var(--nag-surface-2); color: var(--nag-blue-500); }
.nav-link-custom.active {
    background: #fff;
    color: var(--nag-blue-700);
    border-left-color: var(--nag-blue-500);
}

.nav-install-sub,
.nav-download-sub {
    display: block;
    padding: 0.3em 0.65em;
    color: var(--nag-blue-500);
    text-decoration: none;
    font-size: 0.93em;
    border-radius: 0.35em;
    transition: background .15s ease;
}
.nav-install-sub:hover,
.nav-download-sub:hover { background: var(--nag-surface-2); }
.nav-install-sub.active,
.nav-download-sub.active { background: #fff; color: var(--nag-blue-700); }

/* ---- Team cards ------------------------------------------------------ */
.team-grid {
    display: grid;
    gap: 1rem;
    margin-top: 1.25rem;
}
.team-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: #fff;
    border: 1px solid var(--nag-border);
    border-radius: 0.6rem;
    padding: 1rem 1.15rem;
    transition: box-shadow .15s ease, border-color .15s ease, transform .15s ease;
}
.team-card:hover {
    border-color: #cdd8e6;
    box-shadow: 0 6px 18px rgba(16, 38, 66, 0.07);
    transform: translateY(-1px);
}
.team-avatar {
    flex: 0 0 auto;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-weight: 600;
    font-size: 1rem;
    color: #fff;
    background: linear-gradient(135deg, var(--nag-blue-700), var(--nag-blue-500));
    letter-spacing: 0.02em;
}
.team-info { min-width: 0; }
.team-name { margin: 0 0 0.15rem; font-size: 1.05rem; font-weight: 600; }
.team-name a { color: var(--nag-blue-900); text-decoration: none; }
.team-name a:hover { color: var(--nag-blue-500); text-decoration: underline; }
.team-affil { font-size: 0.92rem; color: var(--nag-muted); }

/* ---- Acknowledgements ------------------------------------------------ */
.ack {
    margin-top: 2rem;
    background: var(--nag-surface);
    border: 1px solid var(--nag-border);
    border-left: 3px solid var(--nag-blue-500);
    border-radius: 0.6rem;
    padding: 1.1rem 1.25rem;
}
.ack-title {
    margin: 0 0 0.4rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--nag-blue-700);
}
.ack-text { margin: 0 0 0.75rem; color: var(--nag-ink); }
.ack-people { display: flex; flex-direction: column; align-items: flex-start; gap: 0.5rem; }
.ack-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.45em;
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--nag-blue-900);
    background: #fff;
    border: 1px solid var(--nag-border);
    border-radius: 999px;
    padding: 0.3em 0.85em;
}
.ack-chip::before {
    content: "";
    width: 0.5em;
    height: 0.5em;
    border-radius: 50%;
    background: var(--nag-blue-500);
}
.ack-role {
    font-weight: 400;
    font-size: 0.82rem;
    color: var(--nag-muted);
}

/* ---- Publications ---------------------------------------------------- */
.pub-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1.25rem;
}
.pub-card {
    background: #fff;
    border: 1px solid var(--nag-border);
    border-left: 3px solid var(--nag-blue-500);
    border-radius: 0.6rem;
    padding: 1rem 1.2rem;
    transition: box-shadow .15s ease, border-color .15s ease;
}
.pub-card:hover {
    border-color: #cdd8e6;
    border-left-color: var(--nag-blue-500);
    box-shadow: 0 6px 18px rgba(16, 38, 66, 0.07);
}
.pub-title { margin: 0 0 0.35rem; font-size: 1.02rem; font-weight: 600; color: var(--nag-blue-900); }
.pub-badge {
    display: inline-block;
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #8a5a00;
    background: #fff4dd;
    border: 1px solid #f0dca8;
    border-radius: 999px;
    padding: 0.12em 0.6em;
    margin-left: 0.5em;
    vertical-align: middle;
}
.pub-authors { margin: 0 0 0.2rem; font-size: 0.95rem; color: var(--nag-ink); }
.pub-authors .me { font-weight: 600; }
.pub-venue { margin: 0 0 0.7rem; font-size: 0.9rem; font-style: italic; color: var(--nag-muted); }
.pub-links { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.pub-link {
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--nag-blue-700);
    background: var(--nag-surface);
    border: 1px solid var(--nag-border);
    border-radius: 0.4em;
    padding: 0.3em 0.8em;
    text-decoration: none;
    transition: background .15s ease, color .15s ease;
}
.pub-link:hover { background: var(--nag-surface-2); color: var(--nag-blue-500); }

/* ---- Code blocks ----------------------------------------------------- */
#content-panel pre {
    background: var(--nag-surface);
    border: 1px solid var(--nag-border);
    border-radius: 0.4em;
    padding: 0.8em 1em;
    font-size: 0.9em;
    line-height: 1.5;
    overflow-x: auto;
}
.code-note { font-size: 0.92em; color: var(--nag-muted); margin-top: 0.35em; }

/* ---- License block --------------------------------------------------- */
.license-text {
    font-size: 0.95em;
    background: var(--nag-surface);
    border: 1px solid var(--nag-border);
    padding: 1.1em 1.4em;
    border-radius: 0.5em;
}

/* ---- Download button ------------------------------------------------- */
.download-btn {
    display: inline-block;
    padding: 0.7em 1.4em;
    font-weight: 600;
    color: #fff !important;
    background: linear-gradient(120deg, var(--nag-blue-900), var(--nag-blue-500));
    border-radius: 0.45em;
    text-decoration: none !important;
    transition: filter .15s ease, box-shadow .15s ease;
}
.download-btn:hover {
    filter: brightness(1.1);
    box-shadow: 0 6px 18px rgba(16, 38, 66, 0.18);
}

/* ---- Responsive ------------------------------------------------------ */
@media (max-width: 767.98px) {
    .site-header { padding: 2rem 0; }
    .sidebar { position: static; margin-bottom: 1.5rem; }
}