/* ── Reset & Base ── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html { scroll-behavior: smooth; scrollbar-gutter: stable; font-size: 125%; }

body {
    font-family: var(--font-body);
    background-color: var(--bg);
    color: var(--ink);
    line-height: 1.5;
    transition: background-color 0.35s ease, color 0.35s ease;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

body::after {
    content: '';
    position: fixed; inset: 0; z-index: 3000;
    pointer-events: none;
    opacity: var(--grain-opacity);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

::selection { background: var(--signal); color: var(--on-signal); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--hairline-strong); border: 3px solid var(--bg); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: var(--signal); }

body.modal-open { overflow: hidden; }

/* ── Utility Classes ── */
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.micro {
    font-family: var(--font-mono); font-size: 0.625rem; font-weight: 500;
    letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted);
}

/* ── App Shell ── */
.app-shell {
    display: flex; flex-direction: column; min-height: 100vh;
}
.app-content {
    flex: 1; max-width: 90rem; margin: 0 auto; padding: 2rem; width: 100%;
}
.app-footer {
    text-align: center; padding: 1rem 2rem;
    border-top: 1px solid var(--hairline);
    font-family: var(--font-mono); font-size: 0.5625rem; letter-spacing: 0.08em;
    text-transform: uppercase; color: var(--muted);
}
.app-footer strong { color: var(--signal); }
.page-container { display: none; }
.page-container.active { display: block; }

/* ── Boot Reveal ── */
.js body:not(.is-ready) .reveal { opacity: 0; transform: translateY(8px); }
.js body.is-ready .reveal {
    opacity: 1; transform: none;
    transition: opacity 0.5s var(--ease-out), transform 0.5s var(--ease-out);
}

/* ── Links ── */
a { color: var(--signal); text-decoration: none; }
a:hover { color: var(--signal-deep); }

/* ── Spacing utilities ── */
.mt-1 { margin-top: 0.5rem; } .mt-2 { margin-top: 1rem; } .mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; } .mb-2 { margin-bottom: 1rem; } .mb-3 { margin-bottom: 1.5rem; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--muted); }
.hidden { display: none !important; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-wrap { flex-wrap: wrap; }
.gap-05 { gap: 0.5rem; }
.gap-1 { gap: 1rem; }
.gap-2 { gap: 1.5rem; }