/* base.css — reset, app shell layout, and small utilities. */

*, *::before, *::after { box-sizing: border-box; }

html { font-family: var(--font-ui); font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    min-height: 100vh;
    background: var(--surface-0);
    color: var(--text);
    font-size: var(--fs-base);
    line-height: var(--lh-base);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, p { margin: 0; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible { outline: none; box-shadow: var(--focus-ring); border-radius: var(--r-sm); }

::selection { background: var(--accent-soft); }

code, pre, .mono { font-family: var(--font-mono); }

/* Scrollbars */
* { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: var(--r-full); border: 2px solid var(--surface-0); }

/* ── App shell ───────────────────────────────────────────── */
.app {
    display: grid;
    grid-template-columns: var(--sidebar-w) 1fr;
    min-height: 100vh;
}

.sidebar {
    position: sticky;
    top: 0;
    align-self: start;
    height: 100vh;
    z-index: var(--z-sidebar);
    display: flex;
    flex-direction: column;
    background: var(--surface-1);
    border-right: 1px solid var(--border);
    padding: var(--sp-4);
    gap: var(--sp-2);
}

.sidebar__brand {
    display: flex;
    align-items: center;
    gap: var(--sp-3);
    padding: var(--sp-2) var(--sp-3) var(--sp-5);
    font-weight: var(--fw-bold);
    font-size: var(--fs-lg);
    letter-spacing: -0.01em;
}
.sidebar__brand .logo {
    display: grid;
    place-items: center;
    width: 34px; height: 34px;
    border-radius: var(--r-md);
    background: var(--accent);
    color: var(--on-accent);
    font-weight: var(--fw-bold);
    flex: none;
}

.sidebar__nav { display: flex; flex-direction: column; gap: 2px; flex: 1; overflow-y: auto; }
.sidebar__foot { border-top: 1px solid var(--border); padding-top: var(--sp-3); display: flex; flex-direction: column; gap: var(--sp-2); }

/* Collapsed (rail) sidebar — desktop only; toggled via the topbar menu button. */
.app.collapsed { grid-template-columns: var(--sidebar-rail-w) 1fr; }
.app.collapsed .sidebar { padding: var(--sp-3) var(--sp-2); align-items: stretch; }
.app.collapsed .sidebar__brand { justify-content: center; padding: var(--sp-2) 0 var(--sp-4); }
.app.collapsed .nav-item { justify-content: center; }
.app.collapsed .sidebar__foot { align-items: center; }
.app.collapsed .sidebar__brand .brand-text,
.app.collapsed .nav-item__label,
.app.collapsed .sidebar__group,
.app.collapsed .sidebar__foot .user-name,
.app.collapsed .logout-label { display: none; }

.main { display: flex; flex-direction: column; min-width: 0; }

.topbar {
    position: sticky;
    top: 0;
    z-index: var(--z-topbar);
    height: var(--topbar-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-4);
    padding: 0 var(--sp-6);
    background: color-mix(in srgb, var(--surface-0) 80%, transparent);
    backdrop-filter: saturate(1.4) blur(8px);
    border-bottom: 1px solid var(--border);
}
.topbar__title { font-size: var(--fs-lg); font-weight: var(--fw-semibold); letter-spacing: -0.01em; }
.topbar__actions { display: flex; align-items: center; gap: var(--sp-2); }

.content { padding: var(--sp-6); width: 100%; max-width: calc(var(--content-max) + var(--sp-6) * 2); margin: 0 auto; }
.content--wide { max-width: 100%; }

/* Centered auth layout (login/setup) */
.auth {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: var(--sp-5);
    background:
        radial-gradient(1200px 600px at 100% -10%, var(--accent-soft), transparent 60%),
        var(--surface-0);
}
.auth__card { width: 100%; max-width: 400px; }

/* ── Utilities ───────────────────────────────────────────── */
.stack { display: flex; flex-direction: column; gap: var(--sp-4); }
.stack-sm { display: flex; flex-direction: column; gap: var(--sp-2); }
.row { display: flex; align-items: center; gap: var(--sp-3); }
.row-wrap { display: flex; flex-wrap: wrap; gap: var(--sp-3); }
.between { justify-content: space-between; }
.grow { flex: 1; min-width: 0; }
.spacer { flex: 1; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--sp-4); }
.muted { color: var(--text-muted); }
.subtle { color: var(--text-subtle); }
.text-sm { font-size: var(--fs-sm); }
.text-xs { font-size: var(--fs-xs); }
.nowrap { white-space: nowrap; }
.right { text-align: right; }
.hidden { display: none !important; }
.mt-2 { margin-top: var(--sp-2); }
.mt-4 { margin-top: var(--sp-4); }
.mb-4 { margin-bottom: var(--sp-4); }

@media (max-width: 860px) {
    .app, .app.collapsed { grid-template-columns: 1fr; }
    .sidebar { position: fixed; inset: 0 auto 0 0; transform: translateX(-100%); transition: transform var(--t-base); box-shadow: var(--shadow-lg); }
    .sidebar.open { transform: translateX(0); }
    /* On mobile the sidebar is an off-canvas drawer, never a rail. */
    .app.collapsed .sidebar { padding: var(--sp-4); }
    .app.collapsed .brand-text,
    .app.collapsed .nav-item__label,
    .app.collapsed .sidebar__group,
    .app.collapsed .user-name,
    .app.collapsed .logout-label { display: revert; }
    .app.collapsed .nav-item { justify-content: flex-start; }
    .grid-2 { grid-template-columns: 1fr; }
    .content { padding: var(--sp-4); }
    .topbar { padding: 0 var(--sp-4); }
}

@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
}