/* Reset */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
/* Make the HTML `hidden` attribute win against any class-based `display: ...`
   rule. Without !important the UA rule `[hidden]{display:none}` loses to
   any matching class selector (e.g. `.auth-gate { display: grid }`),
   which silently breaks any gate/drawer/modal toggled via the attribute. */
[hidden] { display: none !important; }
body {
  font-family: var(--font-ui);
  font-size: 14px;
  line-height: 1.45;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
img, svg { display: block; }
input, select, textarea, button { font: inherit; color: inherit; }

::selection { background: var(--accent); color: #0e1116; }

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Auth gate */
.auth-gate {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: var(--bg);
  padding: var(--space-5);
  z-index: 10;
}
.auth-card {
  width: min(420px, 100%);
  background: var(--bg-elev-1);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-2);
}
.auth-brand {
  display: flex; align-items: center; gap: var(--space-3);
  margin-bottom: var(--space-3);
}
.auth-brand h1 { margin: 0; font-size: 24px; font-weight: 600; letter-spacing: -0.01em; }
.auth-error {
  margin-top: var(--space-3);
  background: var(--danger-soft);
  color: var(--danger);
  padding: var(--space-3);
  border-radius: var(--r-md);
  font-size: 13px;
}

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

/* Topbar — hidden on desktop */
.topbar {
  display: none;
  align-items: center;
  gap: var(--space-2);
  position: sticky; top: 0;
  /* Account for the OS status bar in installed PWAs (viewport-fit=cover). */
  padding: env(safe-area-inset-top) var(--space-3) 0;
  height: calc(var(--topbar-h) + env(safe-area-inset-top));
  background: var(--bg-elev-1);
  border-bottom: 1px solid var(--border);
  z-index: 5;
}
.topbar-brand {
  display: flex; align-items: center; gap: var(--space-2);
  font-weight: 600; font-size: 16px;
}
.topbar-spacer { flex: 1; }

/* Sidebar */
.sidebar {
  position: sticky; top: 0;
  height: 100vh;
  background: var(--bg-elev-1);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  padding: var(--space-4) 0;
}
.sidebar-brand {
  display: flex; align-items: center; gap: var(--space-3);
  padding: 0 var(--space-5) var(--space-5);
  font-size: 18px; font-weight: 600;
  letter-spacing: -0.01em;
}
.sidebar-nav { display: flex; flex-direction: column; gap: 2px; padding: 0 var(--space-3); }
.sidebar-nav a {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--r-md);
  color: var(--text-dim);
  font-size: 14px;
  transition: background .12s, color .12s;
}
.sidebar-nav a:hover { background: var(--bg-elev-2); color: var(--text); }
.sidebar-nav a.active {
  background: var(--accent-soft);
  color: var(--accent);
}
.sidebar-nav .nav-i {
  display: inline-block; width: 18px; text-align: center;
  color: var(--text-mute); font-size: 14px;
}
.sidebar-nav a.active .nav-i { color: var(--accent); }
.sidebar-foot {
  margin-top: auto;
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--border-soft);
  color: var(--text-mute);
  font-size: 12px;
}
.who { display: flex; align-items: center; gap: var(--space-2); }

/* Main */
.main {
  padding: var(--space-6) var(--space-7);
  min-width: 0;
}
.page-head {
  display: flex; align-items: end; justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}
.page-title { margin: 0; font-size: 28px; font-weight: 600; letter-spacing: -0.02em; }
.page-sub { margin: 4px 0 0; color: var(--text-dim); font-size: 14px; }
.page-actions { display: flex; gap: var(--space-2); }

/* Drawer (mobile) */
.drawer-scrim {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 19;
  animation: fade-in .12s ease;
}

/* Mobile */
@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }
  .topbar { display: flex; }
  .sidebar {
    position: fixed; top: 0; left: 0; bottom: 0;
    width: 280px; height: 100vh;
    transform: translateX(-100%);
    transition: transform .18s ease;
    z-index: 20;
    padding-top: calc(var(--space-4) + env(safe-area-inset-top));
    padding-bottom: calc(var(--space-4) + env(safe-area-inset-bottom));
  }
  body.drawer-open .sidebar { transform: translateX(0); }
  .main {
    /* No top padding — the sticky topbar already provides visual separation,
       and the page-head spacing handles internal breathing room. */
    padding: var(--space-3) var(--space-4) calc(var(--space-4) + env(safe-area-inset-bottom));
  }
  .page-head { margin-top: 0; }
  .page-head { flex-wrap: wrap; }
  .page-title { font-size: 22px; }
}

@media (min-width: 901px) {
  /* Hide topbar back/menu icons on desktop — they're mobile-only affordances */
  .topbar { display: none !important; }
  .drawer-scrim { display: none !important; }
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes pop-in {
  from { opacity: 0; transform: translateY(6px) scale(.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}