@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

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

html, body {
  height: 100%;
  margin: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow: hidden; /* app shell owns its own scroll regions */
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  margin: 0;
  letter-spacing: -0.01em;
}

p { margin: 0; }

a { color: inherit; text-decoration: none; }

ul, ol { margin: 0; padding: 0; list-style: none; }

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

button {
  background: none;
  border: none;
  cursor: pointer;
}

::selection { background: var(--accent); color: var(--accent-ink); }

/* Focus states — always visible, never suppressed */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--r-sm);
}

/* Scrollbars */
* { scrollbar-width: thin; scrollbar-color: var(--border-strong) transparent; }
*::-webkit-scrollbar { width: 8px; height: 8px; }
*::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: var(--r-full); }
*::-webkit-scrollbar-track { background: transparent; }

/* ============== App Shell ============== */
#app-root {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-rows: var(--topbar-h) 1fr;
  grid-template-areas:
    'sidebar topbar'
    'sidebar main';
  height: 100vh;
  transition: grid-template-columns var(--dur-base) var(--ease);
}

#app-root.sidebar-collapsed {
  grid-template-columns: var(--sidebar-w-collapsed) 1fr;
}

#topbar-slot { grid-area: topbar; }
#sidebar-slot { grid-area: sidebar; }

#main-slot {
  grid-area: main;
  overflow-y: auto;
  padding: var(--sp-8) var(--sp-10) var(--sp-12);
}

@media (max-width: 860px) {
  #app-root, #app-root.sidebar-collapsed {
    grid-template-columns: var(--sidebar-w-collapsed) 1fr;
  }
  #main-slot { padding: var(--sp-5); }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}