/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    background: var(--bg);
    color: var(--text);
    font-family: 'DM Sans', sans-serif;
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input { font-family: inherit; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border2); border-radius: 3px; }

/* ── Nav ── */
nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    height: var(--nav-h);
    background: rgba(17, 19, 24, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
}
.nav-inner {
    max-width: var(--maxw);
    width: 100%;
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-logo {
    font-family: 'Arial', serif;
    font-size: 20px;
    font-weight: 500;
    color: var(--text);
    margin-right: 16px;
    letter-spacing: -0.3px;
    cursor: pointer;
}
.nav-links { display: flex; align-items: center; gap: 2px; }
.nav-link {
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text2);
    transition: color 0.15s, background 0.15s;
    cursor: pointer;
}
.nav-link:hover { color: var(--text); background: var(--surface2); }
.nav-link.active { color: var(--accent); background: var(--accent-lt); }
.nav-spacer { flex: 1; }
.nav-cta {
    padding: 8px 20px;
    border-radius: 8px;
    background: var(--accent);
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    transition: opacity 0.15s;
    cursor: pointer;
}
.nav-cta:hover { opacity: 0.85; }

/* ── Page shell ── */
.page { padding-top: var(--nav-h); min-height: 100vh; }
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }

/* ── Footer ── */
footer { border-top: 1px solid var(--border); padding: 32px 0; margin-top: 40px; }
.foot-inner {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.foot-logo { font-family: 'Arial', serif; font-size: 16px; color: var(--text2); }
.foot-ver { font-family: 'Arial', serif; font-size: 11px; color: #d8d8d8; }
.foot-links { display: flex; gap: 20px; }
.foot-lnk { font-size: 13px; color: var(--text3); cursor: pointer; transition: color 0.15s; }
.foot-lnk:hover { color: var(--text2); }
.foot-copy { font-size: 12px; color: var(--text3); }

/* ── Page transitions ── */
.fade-enter-active, .fade-leave-active { transition: opacity 0.18s; }
.fade-enter-from, .fade-leave-to { opacity: 0; }

/* ── Expand row transition ── */
.slide-enter-active, .slide-leave-active {
    transition: max-height 0.22s ease, opacity 0.18s;
    overflow: hidden;
}
.slide-enter-from, .slide-leave-to { max-height: 0; opacity: 0; }
.slide-enter-to, .slide-leave-from { max-height: 600px; opacity: 1; }

/* ── Responsive ── */
@media (max-width: 768px) {
    .cmd-layout { grid-template-columns: 1fr; }
    .cmd-sidebar { position: static; }
    .about-hero { grid-template-columns: 1fr; }
    .abt-vis { display: none; }
    .abt-sec { grid-template-columns: 1fr; gap: 12px; }
    .stat-strip { grid-template-columns: 1fr; }
    .foot-inner { flex-direction: column; gap: 16px; text-align: center; }
}