/* ============================================
   G.R.I.P. Platform — App Shell Layout
   ============================================ */

/* ---- App Shell ---- */
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: var(--header-height) 1fr;
  grid-template-areas:
    "sidebar header"
    "sidebar main";
  min-height: 100vh;
  width: 100%;
}

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

/* ---- Sidebar ---- */
.sidebar {
  grid-area: sidebar;
  background: var(--color-bg-raised);
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  z-index: var(--z-sticky);
  overflow-y: auto;
  overflow-x: hidden;
  transition: width var(--transition-slow);
}

.sidebar__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  height: var(--header-height);
  border-bottom: 1px solid var(--color-border);
}

.sidebar__logo-text {
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--color-accent);
  letter-spacing: 0.1em;
  text-shadow: var(--text-glow-cyan);
}

.sidebar__nav {
  flex: 1;
  padding: var(--space-4) var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.sidebar__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  transition: var(--transition-all);
  text-decoration: none;
}

.sidebar__link:hover {
  color: var(--color-text-primary);
  background: rgba(255, 255, 255, 0.04);
  text-decoration: none;
}

.sidebar__link--active {
  color: var(--color-accent);
  background: var(--color-accent-dim);
}

.sidebar__link--active:hover {
  background: var(--color-accent-dim);
}

.sidebar__footer {
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
}

/* ---- Header Bar ---- */
.header {
  grid-area: header;
  background: var(--color-bg-raised);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  height: var(--header-height);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}

.header__title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.header__status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

/* ---- Main Content ---- */
.main {
  grid-area: main;
  padding: var(--space-6);
  overflow-y: auto;
  max-width: var(--content-max-width);
  width: 100%;
}

.main--centered {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 100%;
}

.main--full {
  max-width: 100%;
  padding: 0;
}

/* ---- Page Layouts ---- */
.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.page-header__title {
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
}

.page-header__subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

/* ---- Session Grid: Scenario Left | Biometrics Right ---- */
.session-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
  height: calc(100vh - var(--header-height) - var(--space-12));
}

.session-grid__scenario {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  overflow-y: auto;
}

.session-grid__biometrics {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  overflow-y: auto;
}

/* ---- Content Grid Utilities ---- */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

.grid-auto-fill {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
}

/* ---- Responsive Breakpoints ---- */
@media (max-width: 1200px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .app-shell {
    grid-template-columns: 1fr;
    grid-template-rows: var(--header-height) 1fr;
    grid-template-areas:
      "header"
      "main";
  }

  .sidebar {
    position: fixed;
    left: -100%;
    width: 280px;
    z-index: var(--z-overlay);
    transition: left var(--transition-slow);
  }

  .sidebar--open {
    left: 0;
  }

  .main {
    padding: var(--space-4);
  }

  .session-grid {
    grid-template-columns: 1fr;
    height: auto;
  }

  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .main {
    padding: var(--space-3);
  }

  .header {
    padding: 0 var(--space-4);
  }
}

/* ---- Sidebar Overlay (mobile) ---- */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: calc(var(--z-overlay) - 1);
}

.sidebar-overlay--visible {
  display: block;
}