/* App layout: sidebar + header + content, mobile-first. */

.app-shell {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-rows: auto 1fr;
  grid-template-areas:
    "header"
    "main";
  min-height: 100vh;
  min-height: 100dvh;
}

/* --- Header (mobile + desktop) --- */
.app-header {
  grid-area: header;
  position: sticky;
  top: 0;
  z-index: 30;
  height: calc(var(--header-h) + var(--safe-top));
  padding-top: var(--safe-top);
  background: rgba(11, 15, 23, 0.92);
  backdrop-filter: saturate(120%) blur(10px);
  -webkit-backdrop-filter: saturate(120%) blur(10px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-left: max(var(--space-4), var(--safe-left));
  padding-right: max(var(--space-4), var(--safe-right));
}
.app-header__brand {
  display: flex; align-items: center; gap: var(--space-2);
  font-weight: 600;
  letter-spacing: 0.02em;
  font-size: var(--fs-md);
}
.app-header__brand img { width: 28px; height: 28px; }
.app-header__title {
  font-size: var(--fs-md);
  color: var(--text);
  font-weight: 500;
}
.app-header__menu-btn { display: inline-flex; }
.app-header__user {
  display: flex; align-items: center; gap: var(--space-2);
}
.app-header__notif {
  position: relative;
  width: 38px; height: 38px;
  border-radius: 999px;
  display: grid; place-items: center;
  color: var(--text-muted);
}
.app-header__notif:hover { background: var(--surface-2); color: var(--text); }
.app-header__notif-dot {
  position: absolute; top: 4px; right: 4px;
  min-width: 18px; height: 18px;
  padding: 0 5px;
  background: var(--brand);
  color: #fff;
  border-radius: 999px;
  box-shadow: 0 0 0 2px var(--bg);
  font-size: 11px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

/* --- Sidebar --- */
.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  z-index: 50;
  display: flex; flex-direction: column;
  transform: translateX(-100%);
  transition: transform var(--t-base) ease;
  padding-top: calc(var(--safe-top) + var(--space-3));
  padding-bottom: calc(var(--safe-bottom) + var(--space-3));
  padding-left: max(0px, var(--safe-left));
}
.sidebar.is-open { transform: translateX(0); }

.sidebar__brand {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-2) var(--space-5) var(--space-4);
}
.sidebar__brand img { width: 32px; height: 32px; }
.sidebar__brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.sidebar__brand-text strong { font-size: var(--fs-md); font-weight: 600; letter-spacing: 0.04em; }
.sidebar__brand-text small  { font-size: 11px; color: var(--text-dim); letter-spacing: 0.08em; text-transform: uppercase; }

.sidebar__nav {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-2) var(--space-3);
}
.sidebar__group { margin-bottom: var(--space-4); }
.sidebar__group-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  padding: 6px var(--space-3) 4px;
}
.sidebar__link {
  display: flex; align-items: center; gap: var(--space-3);
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: var(--fs-base);
  transition: background var(--t-fast) ease, color var(--t-fast) ease;
  width: 100%;
  text-align: left;
}
.sidebar__link:hover {
  background: var(--surface-2);
  color: var(--text);
}
.sidebar__link.is-active {
  background: var(--surface-2);
  color: var(--text);
  position: relative;
}
.sidebar__link.is-active::before {
  content: '';
  position: absolute; left: -3px; top: 8px; bottom: 8px;
  width: 3px; border-radius: 3px;
  background: var(--brand);
}
.sidebar__link svg { width: 18px; height: 18px; flex-shrink: 0; }
.sidebar__badge {
  margin-left: auto;
  font-size: var(--fs-xs);
  background: var(--brand);
  color: #fff;
  padding: 2px 8px;
  border-radius: 999px;
  min-width: 20px;
  text-align: center;
}

.sidebar__user {
  display: flex; align-items: center; gap: var(--space-3);
  margin: var(--space-3);
  padding: 10px 12px;
  border-radius: var(--radius);
  background: var(--surface-2);
  border: 1px solid var(--border);
}
.sidebar__user-meta { flex: 1; min-width: 0; }
.sidebar__user-name { font-size: var(--fs-sm); font-weight: 500; color: var(--text); }
.sidebar__user-role { font-size: var(--fs-xs); color: var(--text-dim); }
.sidebar__user-out {
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  display: grid; place-items: center;
}
.sidebar__user-out:hover { background: var(--surface-3); color: var(--text); }

/* --- Backdrop (mobile drawer) --- */
.app-backdrop {
  position: fixed; inset: 0;
  background: var(--overlay);
  z-index: 40;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-base) ease;
}
.app-backdrop.is-visible { opacity: 1; pointer-events: auto; }

/* Lock page scroll while the mobile drawer is open. */
body.is-drawer-open { overflow: hidden; }

/* --- Main content --- */
.app-main {
  grid-area: main;
  padding: var(--space-4) max(var(--space-4), var(--safe-left)) calc(var(--space-7) + var(--safe-bottom)) max(var(--space-4), var(--safe-right));
  max-width: var(--content-max);
  width: 100%;
  margin: 0 auto;
}

/* --- Login --- */
.login-page {
  min-height: 100vh; min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
  background: radial-gradient(1200px 700px at 20% 0%, rgba(220, 38, 38, 0.08), transparent 60%),
              radial-gradient(900px 600px at 100% 100%, rgba(34, 211, 238, 0.04), transparent 60%),
              var(--bg);
}
.login-card {
  width: 100%; max-width: 400px;
  margin-inline: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-lg);
}
.login-brand {
  display: flex; flex-direction: column; align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
  text-align: center;
}
.login-brand img { width: 56px; height: 56px; }
.login-brand h1 {
  font-size: var(--fs-xl);
  letter-spacing: 0.08em;
}
.login-brand p {
  color: var(--text-muted);
  font-size: var(--fs-sm);
}
.login-form { display: flex; flex-direction: column; gap: var(--space-4); }
.login-hint {
  margin-top: var(--space-5);
  padding: var(--space-3);
  border-radius: var(--radius);
  background: var(--surface-2);
  border: 1px dashed var(--border-strong);
  font-size: var(--fs-xs);
  color: var(--text-dim);
}
.login-hint strong { color: var(--text-muted); font-weight: 500; }
.login-error {
  background: var(--danger-soft);
  color: var(--danger);
  border-radius: var(--radius);
  padding: 10px 12px;
  font-size: var(--fs-sm);
  display: none;
}
.login-error.is-visible { display: block; }

/* --- Dashboard --- */
.dash-grid {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: 1fr;
}
.dash-grid--kpis { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }

.attention-list {
  display: flex; flex-direction: column;
  gap: var(--space-2);
}
.attention-item {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius);
  background: var(--surface-2);
  border: 1px solid var(--border);
}
.attention-item--red {
  border-color: var(--danger);
  background: linear-gradient(180deg, var(--danger-soft), transparent 90%);
}
.attention-item__meta { flex: 1; min-width: 0; }
.attention-item__title { font-weight: 500; }
.attention-item__sub   { font-size: var(--fs-sm); color: var(--text-muted); }

/* --- Stub page --- */
.stub {
  min-height: 320px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: var(--space-3);
  color: var(--text-muted);
  text-align: center;
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
}
.stub__icon {
  width: 56px; height: 56px;
  border-radius: 999px;
  background: var(--surface-2);
  display: grid; place-items: center;
  color: var(--text-dim);
}

/* ------------------- Tablet / Desktop ≥ 900px ------------------- */
@media (min-width: 900px) {
  .app-shell {
    grid-template-columns: var(--sidebar-w) 1fr;
    grid-template-areas:
      "sidebar header"
      "sidebar main";
  }
  .app-header__menu-btn { display: none; }
  .sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    transform: none;
    grid-area: sidebar;
  }
  .app-backdrop { display: none; }
  .app-main {
    padding: var(--space-5) var(--space-6) var(--space-7);
  }
}

@media (min-width: 1280px) {
  .app-main { padding: var(--space-6) var(--space-7) var(--space-8); }
}