/* =====================================================================
   Layout — sidebar, topbar, main, responsiveness (mobile / tablet / desktop / TV)
   ===================================================================== */

.vai-app {
  display: grid;
  grid-template-columns: var(--vai-sidebar-w) 1fr;
  grid-template-rows: var(--vai-topbar-h) 1fr;
  grid-template-areas:
    "sidebar topbar"
    "sidebar main";
  min-height: 100vh;
  background: var(--vai-bg);
  transition: grid-template-columns var(--vai-dur-base) var(--vai-ease);
}

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

/* ============================== SIDEBAR ============================== */

.vai-sidebar {
  grid-area: sidebar;
  background: var(--vai-surface);
  border-right: 1px solid var(--vai-border-soft);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow: hidden;
  z-index: var(--vai-z-sticky);
}

.vai-sidebar__head {
  height: var(--vai-topbar-h);
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 18px;
  border-bottom: 1px solid var(--vai-border-soft);
  flex-shrink: 0;
}

.vai-sidebar__logo {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none;
  flex: 1;
  min-width: 0;
}

.vai-sidebar__logo .vai-logo-text { font-size: 28px; }

.vai-sidebar__logo .vai-logo-img {
  height: 30px;
  width: auto;
  display: block;
  flex-shrink: 0;
  transition: height var(--vai-dur-base) var(--vai-ease);
}

.is-collapsed .vai-sidebar__logo .vai-logo-img { height: 24px; }

.vai-sidebar__logo-tag {
  display: inline-flex; align-items: center;
  font-size: 9px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase;
  color: var(--vai-orange);
  background: var(--vai-orange-tint);
  border: 1px solid var(--vai-orange-line);
  border-radius: var(--vai-r-pill);
  padding: 3px 8px;
  white-space: nowrap;
}

.is-collapsed .vai-sidebar__logo-tag,
.is-collapsed .vai-sidebar__nav-label,
.is-collapsed .vai-sidebar__group-label,
.is-collapsed .vai-sidebar__foot-info { display: none; }

.is-collapsed .vai-sidebar__logo .vai-logo-text { font-size: 22px; }

.vai-sidebar__toggle {
  width: 28px; height: 28px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--vai-r-6);
  color: var(--vai-ink-soft);
  transition: background var(--vai-dur-fast) var(--vai-ease);
}
.vai-sidebar__toggle:hover { background: var(--vai-surface-hover); color: var(--vai-ink); }

.vai-sidebar__body {
  flex: 1;
  overflow-y: auto;
  padding: 14px 12px;
}

.vai-sidebar__group { margin-bottom: 18px; }

.vai-sidebar__group-label {
  font-size: 9px;
  text-transform: uppercase;
  letter-spacing: 1.4px;
  color: var(--vai-ink-faint);
  font-weight: 700;
  padding: 0 10px;
  margin-bottom: 6px;
}

.vai-sidebar__nav {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.vai-sidebar__nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  border-radius: var(--vai-r-8);
  font-size: var(--vai-fs-13);
  font-weight: 500;
  color: var(--vai-ink-soft);
  cursor: pointer;
  transition:
    background var(--vai-dur-fast) var(--vai-ease),
    color var(--vai-dur-fast) var(--vai-ease);
  border: 1px solid transparent;
  position: relative;
}

.vai-sidebar__nav-item .vai-icon { color: var(--vai-ink-muted); flex-shrink: 0; }
.vai-sidebar__nav-item:hover {
  background: var(--vai-surface-hover);
  color: var(--vai-ink);
}
.vai-sidebar__nav-item:hover .vai-icon { color: var(--vai-ink); }

.vai-sidebar__nav-item.is-active {
  background: var(--vai-orange-tint);
  color: var(--vai-orange);
  font-weight: 600;
}
.vai-sidebar__nav-item.is-active .vai-icon { color: var(--vai-orange); }
.vai-sidebar__nav-item.is-active::before {
  content: '';
  position: absolute;
  left: -12px; top: 50%; transform: translateY(-50%);
  width: 3px; height: 18px;
  background: var(--vai-orange);
  border-radius: 0 4px 4px 0;
}

.vai-sidebar__nav-badge {
  margin-left: auto;
  font-size: 10px;
  font-weight: 700;
  background: var(--vai-orange);
  color: #fff;
  border-radius: var(--vai-r-pill);
  padding: 1px 7px;
  min-width: 18px;
  text-align: center;
}

.is-collapsed .vai-sidebar__nav-item { justify-content: center; padding: 10px; }
.is-collapsed .vai-sidebar__nav-badge {
  position: absolute; top: 4px; right: 4px;
  margin: 0; padding: 0 4px;
  font-size: 8px; min-width: 14px; height: 14px;
  display: flex; align-items: center; justify-content: center;
}

.vai-sidebar__foot {
  flex-shrink: 0;
  padding: 12px;
  border-top: 1px solid var(--vai-border-soft);
}

.vai-sidebar__user {
  display: flex; align-items: center; gap: 10px;
  padding: 8px;
  border-radius: var(--vai-r-8);
  cursor: pointer;
  transition: background var(--vai-dur-fast);
}
.vai-sidebar__user:hover { background: var(--vai-surface-hover); }

.vai-sidebar__avatar {
  width: 32px; height: 32px;
  border-radius: var(--vai-r-pill);
  background: linear-gradient(135deg, var(--vai-orange), #FF9A5C);
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

.vai-sidebar__foot-info { flex: 1; min-width: 0; }
.vai-sidebar__foot-info .name {
  font-size: var(--vai-fs-13);
  font-weight: 600;
  color: var(--vai-ink);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.vai-sidebar__foot-info .role {
  font-size: var(--vai-fs-10);
  color: var(--vai-ink-muted);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}

/* ============================== TOPBAR ============================== */

.vai-topbar {
  grid-area: topbar;
  background: var(--vai-surface);
  border-bottom: 1px solid var(--vai-border-soft);
  height: var(--vai-topbar-h);
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  position: sticky; top: 0;
  z-index: calc(var(--vai-z-sticky) - 1);
}

.vai-topbar__crumb {
  display: flex; align-items: center; gap: 6px;
  font-size: var(--vai-fs-13);
  color: var(--vai-ink-soft);
}
.vai-topbar__crumb .sep { color: var(--vai-ink-faint); }
.vai-topbar__crumb .last { color: var(--vai-ink); font-weight: 600; }

.vai-topbar__spacer { flex: 1; }

.vai-topbar__search {
  display: flex; align-items: center; gap: 8px;
  background: var(--vai-surface-muted);
  border: 1px solid transparent;
  border-radius: var(--vai-r-8);
  padding: 7px 12px;
  width: 320px;
  max-width: 30vw;
  transition: all var(--vai-dur-fast);
}
.vai-topbar__search:focus-within {
  background: var(--vai-surface);
  border-color: var(--vai-orange);
  box-shadow: var(--vai-shadow-glow);
}
.vai-topbar__search input {
  border: none; outline: none; background: transparent;
  flex: 1; font-size: var(--vai-fs-13); color: var(--vai-ink);
}
.vai-topbar__search input::placeholder { color: var(--vai-ink-faint); }
.vai-topbar__search kbd {
  font-family: var(--vai-font-mono);
  font-size: 10px;
  padding: 2px 6px;
  background: var(--vai-surface);
  border: 1px solid var(--vai-border);
  border-radius: var(--vai-r-4);
  color: var(--vai-ink-muted);
}

.vai-topbar__actions { display: flex; align-items: center; gap: 4px; }

.vai-icon-btn {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--vai-r-8);
  color: var(--vai-ink-soft);
  position: relative;
  transition: all var(--vai-dur-fast);
}
.vai-icon-btn:hover { background: var(--vai-surface-hover); color: var(--vai-ink); }
.vai-icon-btn .dot {
  position: absolute; top: 8px; right: 8px;
  width: 8px; height: 8px;
  border-radius: var(--vai-r-pill);
  background: var(--vai-orange);
  border: 2px solid var(--vai-surface);
}

/* ============================== MAIN ============================== */

.vai-main {
  grid-area: main;
  padding: 24px;
  overflow-x: hidden;
  min-width: 0;
}

.vai-page {
  max-width: var(--vai-content-max);
  margin: 0 auto;
  animation: vai-rise-in var(--vai-dur-slow) var(--vai-ease);
}

.vai-page__head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 24px;
  margin-bottom: 22px;
  flex-wrap: wrap;
}

.vai-page__title {
  font-size: var(--vai-fs-24);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--vai-ink);
}

.vai-page__sub {
  font-size: var(--vai-fs-13);
  color: var(--vai-ink-muted);
  margin-top: 4px;
  max-width: 720px;
}

.vai-page__head-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* ============================== RESPONSIVE ============================== */

@media (min-width: 1800px) {
  /* TV / 4K — escalonar tipografia e gap */
  body { font-size: var(--vai-fs-14); }
  :root {
    --vai-content-max: 1720px;
    --vai-sidebar-w: 280px;
    --vai-topbar-h: 68px;
  }
  .vai-page__title { font-size: 30px; }
  .vai-main { padding: 32px 40px; }
}

@media (max-width: 1100px) {
  .vai-topbar__search { width: 220px; }
}

@media (max-width: 900px) {
  .vai-app {
    grid-template-columns: 1fr;
    grid-template-rows: var(--vai-topbar-h) 1fr;
    grid-template-areas:
      "topbar"
      "main";
  }
  .vai-sidebar {
    position: fixed;
    top: 0; left: 0; bottom: 0;
    width: 280px;
    transform: translateX(-100%);
    transition: transform var(--vai-dur-base) var(--vai-ease);
    box-shadow: var(--vai-shadow-3);
  }
  .vai-app.is-mobile-open .vai-sidebar { transform: translateX(0); }
  .vai-app.is-mobile-open::after {
    content: '';
    position: fixed; inset: 0;
    background: rgba(15, 19, 38, 0.42);
    z-index: calc(var(--vai-z-sticky) - 1);
    backdrop-filter: blur(2px);
  }
  .vai-topbar__search { display: none; }
  .vai-main { padding: 16px; }
  .vai-page__title { font-size: var(--vai-fs-20); }
}

@media (max-width: 560px) {
  .vai-topbar { padding: 0 14px; }
  .vai-page__head { gap: 12px; }
  .vai-page__head-actions { width: 100%; }
}

/* Mobile menu trigger (hidden on desktop) */
.vai-mobile-toggle { display: none; }
@media (max-width: 900px) {
  .vai-mobile-toggle {
    display: inline-flex;
    width: 36px; height: 36px;
    align-items: center; justify-content: center;
    border-radius: var(--vai-r-8);
    color: var(--vai-ink-soft);
    margin-right: 4px;
  }
  .vai-mobile-toggle:hover { background: var(--vai-surface-hover); }
}