/* layout.css — app shell: sidebar + topbar + content outlet. */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--font-ui);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3 { font-family: var(--font-display); letter-spacing: -0.01em; }

.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100vh;
  min-height: 100dvh;
}

/* ---------- Sidebar ---------- */
.sidebar {
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100dvh;
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.16) transparent;
}
.sidebar::-webkit-scrollbar { width: 6px; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.16); border-radius: 3px; }

.sidebar-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-5) var(--sp-4) var(--sp-4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  position: sticky;
  top: 0;
  background: var(--sidebar-bg);
  z-index: 2;
}

/* The logo carries the studio name, so no wordmark beside it. */
.sidebar-brand .brand-logo { width: 100%; max-width: 152px; height: auto; display: block; }

.sidebar-brand .brand-sub {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold-1);
  font-weight: 500;
}

.nav { padding: var(--sp-3) var(--sp-3) var(--sp-7); }

.nav-group-label {
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: #7a7164;
  padding: var(--sp-4) var(--sp-2) var(--sp-2);
  font-weight: 600;
}
.nav-group-label:first-child { padding-top: var(--sp-2); }

.nav a {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  min-height: var(--tap-min);
  padding: 0 var(--sp-3);
  margin-bottom: 2px;
  border-radius: var(--radius-sm);
  color: var(--sidebar-text);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 450;
  position: relative;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}

.nav a:hover { background: var(--sidebar-hover); color: #fff; }

.nav a.is-active {
  background: var(--sidebar-active);
  color: #fff;
  font-weight: 550;
}
.nav a.is-active::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 3px; height: 18px;
  background: var(--gold-1);
  border-radius: 0 2px 2px 0;
}

.nav a .ico {
  width: 17px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  opacity: 0.75;
  flex: none;
}
.nav a.is-active .ico, .nav a:hover .ico { opacity: 1; }

.nav-badge {
  margin-left: auto;
  min-width: 19px; height: 19px;
  padding: 0 5px;
  border-radius: var(--radius-pill);
  background: var(--due);
  color: #fff;
  font-size: 10.5px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-variant-numeric: tabular-nums;
}

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

.topbar {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-5);
  min-height: 60px;
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(8px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.topbar h1 {
  font-size: var(--text-xl);
  font-weight: 600;
  margin: 0;
  margin-right: auto;
  line-height: var(--leading-tight);
}

.menu-toggle { display: none; }

.content {
  padding: var(--sp-5);
  flex: 1;
  max-width: 1320px;
  width: 100%;
  animation: page-in var(--dur) var(--ease);
}
@keyframes page-in { from { opacity: 0; transform: translateY(4px); } }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .app { grid-template-columns: 1fr; }

  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: min(var(--sidebar-w), 82vw);
    z-index: var(--z-nav);
    transform: translateX(-100%);
    transition: transform var(--dur) var(--ease);
    box-shadow: var(--shadow-lg);
  }
  .sidebar.is-open { transform: translateX(0); }

  .menu-toggle { display: inline-flex; }

  .scrim {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: calc(var(--z-nav) - 1);
    animation: fade var(--dur-fast) var(--ease);
  }
  .scrim[hidden] { display: none; }

  .topbar { padding: var(--sp-3) var(--sp-4); }
  .topbar h1 { font-size: var(--text-lg); }
  .content { padding: var(--sp-4); }
}

/* Stop the page scrolling behind an open nav or dialog. */
body.no-scroll { overflow: hidden; }

/* Theme toggle shows the icon for the theme you'd switch TO. */
[data-theme='light'] .icon-moon { display: none; }
[data-theme='dark'] .icon-sun { display: none; }

/* ---------- Collapsible rail (desktop) ---------- */
.nav-collapse {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  width: calc(100% - var(--sp-5));
  margin: auto var(--sp-3) var(--sp-4);
  padding: 0 var(--sp-3);
  min-height: 38px;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-faint);
  font: inherit;
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease);
}
.nav-collapse:hover { background: var(--sidebar-hover); color: var(--sidebar-text); }
.nav-collapse svg { flex: none; transition: transform var(--dur) var(--ease); }

@media (min-width: 901px) {
  .app.is-rail { grid-template-columns: var(--sidebar-rail) 1fr; }

  .is-rail .sidebar { width: var(--sidebar-rail); }
  .is-rail .nav-text,
  .is-rail .nav-group-label,
  .is-rail .brand-sub { display: none; }

  .is-rail .sidebar-brand { padding: var(--sp-4) var(--sp-2); }
  .is-rail .brand-logo { max-width: 40px; }

  .is-rail .nav { padding: var(--sp-3) var(--sp-2) var(--sp-6); }
  .is-rail .nav a { justify-content: center; padding: 0; }
  .is-rail .nav a .ico { width: auto; }

  /* Group boundaries still readable without labels. */
  .is-rail .nav-group-label + a { margin-top: var(--sp-3); position: relative; }
  .is-rail .nav-group-label + a::after {
    content: '';
    position: absolute;
    top: calc(var(--sp-3) * -1 + 2px);
    left: 22%; right: 22%;
    height: 1px;
    background: rgba(255, 255, 255, 0.08);
  }

  .is-rail .nav-collapse { justify-content: center; padding: 0; }
  .is-rail .nav-collapse svg { transform: rotate(180deg); }

  .is-rail .nav-badge {
    position: absolute;
    top: 3px; right: 6px;
    margin: 0;
    min-width: 15px; height: 15px;
    font-size: 9.5px;
    padding: 0 3px;
  }

  /* Tooltips: only needed when the label is hidden. */
  .is-rail .nav a::before {
    content: attr(data-label);
    position: absolute;
    left: calc(100% + 10px);
    top: 50%;
    transform: translateY(-50%) translateX(-4px);
    padding: 0.34rem 0.6rem;
    background: var(--ink);
    color: #fff;
    font-size: var(--text-xs);
    font-weight: 500;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    box-shadow: var(--shadow);
    transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
    z-index: 5;
  }
  .is-rail .nav a:hover::before,
  .is-rail .nav a:focus-visible::before {
    opacity: 1;
    transform: translateY(-50%) translateX(0);
  }
}

/* On mobile the drawer is always full width; the rail never applies. */
@media (max-width: 900px) {
  .nav-collapse { display: none; }
}