/* ============================================================
   Global Shell v3 (Light Academy)
   Fixed left sidebar, wordmark, text-first links, grouped admin
   accordion, off-canvas mobile drawer. Selector names unchanged
   across design generations.
   ============================================================ */

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  width: 100%;
  line-height: 1.65;
}

/* Subtle cool wash at the top of the page — quiet, not a gradient blob.
   inset left edge tracks the sidebar so the rail itself stays plain white. */
body::before {
  content: "";
  position: fixed;
  inset: 0 0 0 var(--sidebar-w);
  z-index: -1;
  pointer-events: none;
  transition: inset var(--dur-med) var(--ease-out);
  background:
    linear-gradient(180deg, #eef2fa 0%, var(--ink-950) 260px);
}
body.header-minimized::before {
  inset: 0 0 0 var(--sidebar-w-collapsed);
}

h1 {
  color: var(--text-color);
  margin-top: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-h1);
  letter-spacing: -0.015em;
}

h2 {
  font-size: var(--fs-h2);
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.01em;
}

a {
  color: inherit;
}

/* ---------- Sidebar shell ---------- */
:root {
  --sidebar-w: 264px;
  --sidebar-w-collapsed: 68px;
}

body {
  padding-left: var(--sidebar-w);
  transition: padding-left var(--dur-med) var(--ease-out);
}

nav.app-nav {
  position: fixed;
  inset: 0 auto 0 0;
  width: var(--sidebar-w);
  background: #ffffff;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  border-right: 1px solid var(--glass-border);
  border-bottom: none;
  box-shadow: 1px 0 3px rgba(26, 34, 51, 0.04);
  z-index: var(--z-nav);
  overflow: hidden; /* scroll lives only on .nav-links — avoids nested scroll trap */
  transition: width var(--dur-med) var(--ease-out);
}

nav.app-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--dur-fast) ease, background var(--dur-fast) ease;
  display: flex;
  align-items: center;
  gap: 0.65rem;
  white-space: nowrap;
}

nav.app-nav a:hover {
  color: var(--primary-600);
}

nav.app-nav a svg,
nav.app-nav button svg {
  /* Size/stroke-width come from the {% icon %} tag's own attributes per
     call (a CSS rule here would win over the SVG's presentational attrs
     and flatten every icon to one size regardless of size=/stroke=). */
  flex-shrink: 0;
  opacity: 0.8;
}

/* ---------- Sidebar head (brand + collapse) ---------- */
.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1rem 0.85rem;
  flex-shrink: 0;
}

.logo-text {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-width: 0;
  overflow: hidden;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
  color: #fff;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  box-shadow: 0 2px 6px rgba(39, 73, 201, 0.28);
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--text-color);
  letter-spacing: -0.01em;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-toggle-btn {
  background: var(--ink-950);
  border: 1px solid var(--border-soft);
  color: var(--text-muted);
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  border-radius: 7px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--dur-med) ease;
}
.header-toggle-btn:hover {
  background: var(--primary-50);
  color: var(--primary-600);
  border-color: var(--primary-100);
}
.header-toggle-btn svg {
  transition: transform var(--dur-med) ease;
}
body.header-minimized .header-toggle-btn svg {
  transform: rotate(180deg);
}

/* ---------- Subject switcher ---------- */
.sidebar-subject.sect-switcher {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin: 0 1rem 0.9rem;
  background: var(--ink-950);
  padding: 3px;
  border-radius: 10px;
  border: 1px solid var(--border-soft);
}

.sect-btn {
  flex: 1 1 auto;
  padding: 5px 10px;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
  text-align: center;
  color: var(--text-muted);
  transition: all var(--dur-fast) ease;
  white-space: nowrap;
}
.sect-btn:hover {
  color: var(--primary-600);
}
.sect-btn.active {
  background: #ffffff;
  color: var(--primary-700);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-soft);
}

.sect-toan.active { color: var(--primary-700); }
.sect-ly.active { color: var(--violet-500); }
.sect-tin.active { color: var(--jade-500); }

/* ---------- Primary nav list ---------- */
.nav-links {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding: 0 0.65rem 0.5rem;
  flex: 1 1 auto;
  min-height: 0;
  overflow-x: hidden;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

.nav-group-label {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  opacity: 0.7;
  padding: 0.9rem 0.6rem 0.35rem;
  flex-shrink: 0;
}

.nav-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ---------- Nav item variants (legacy classes) ---------- */
.nav-item,
.nav-item-highlight,
.nav-item-social,
.nav-item-master,
.nav-item-accent {
  position: relative;
  width: 100%;
  padding: 0.55rem 0.6rem;
  border-radius: 9px;
  font-size: 0.9rem;
}

.nav-item:hover,
.nav-item-highlight:hover,
.nav-item-social:hover,
.nav-item-accent:hover {
  background: var(--primary-50);
  color: var(--primary-600) !important;
}

.nav-item-highlight {
  color: var(--primary-700) !important;
  font-weight: 700 !important;
}

.nav-item-social {
  color: var(--text-muted) !important;
  font-weight: 500 !important;
}

.nav-item-master {
  font-size: 0.86rem;
  color: var(--text-muted) !important;
  font-weight: 600 !important;
  transition: all var(--dur-fast) ease;
}

.nav-item-master:hover {
  background: var(--primary-50);
  color: var(--primary-600) !important;
}

.nav-item-accent {
  color: var(--crimson-500) !important;
  font-weight: 600 !important;
}

/* ---------- Active-page indicator ---------- */
nav.app-nav a[aria-current="page"] {
  background: var(--primary-50);
  color: var(--primary-700) !important;
  font-weight: 600;
}
nav.app-nav a[aria-current="page"]::before {
  content: "";
  position: absolute;
  left: -0.65rem;
  top: 20%;
  bottom: 20%;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--primary-600);
}

/* ---------- Master View toggle ---------- */
body.master-realm-hidden .nav-item-master,
body.master-realm-hidden .master-dd {
  display: none !important;
}

.realm-toggle-btn {
  cursor: pointer;
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--text-muted);
  background: none;
  border: 1px solid var(--glass-border);
  padding: 6px 10px;
  border-radius: 7px;
  transition: all var(--dur-med) ease;
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-bottom: 0.6rem;
}

body:not(.master-realm-hidden) .realm-toggle-btn {
  background: var(--primary-600);
  color: #fff;
  border-color: var(--primary-600);
}

/* ---------- Collapse to icon rail ---------- */
body.header-minimized {
  padding-left: var(--sidebar-w-collapsed);
}
body.header-minimized nav.app-nav {
  width: var(--sidebar-w-collapsed);
}
body.header-minimized .brand-name,
body.header-minimized .sidebar-subject,
body.header-minimized .nav-group-label,
body.header-minimized .nav-label,
body.header-minimized .user-greeting,
body.header-minimized .realm-toggle-btn {
  display: none !important;
}
body.header-minimized .sidebar-head {
  justify-content: center;
  padding: 1rem 0.5rem 0.85rem;
}
body.header-minimized .sidebar-head .logo-text {
  display: none;
}
body.header-minimized .nav-item,
body.header-minimized .nav-item-highlight,
body.header-minimized .nav-item-social,
body.header-minimized .nav-item-master,
body.header-minimized .nav-item-accent {
  justify-content: center;
  padding: 0.6rem;
}
body.header-minimized .dd-caret {
  display: none !important;
}
/* Collapsed rail: allow admin flyout to escape the rail; scroll lives on .nav-links */
body.header-minimized nav.app-nav {
  overflow: visible;
}
body.header-minimized .master-dd {
  position: relative;
}
body.header-minimized .master-dd-panel {
  position: absolute;
  left: calc(100% + 0.5rem);
  top: 0;
  min-width: 220px;
  max-height: min(70vh, 480px);
  overflow-y: auto;
  margin: 0;
  padding: 0.4rem;
  background: #ffffff;
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  z-index: var(--z-dropdown);
}
body.header-minimized .master-dd-panel .nav-label {
  display: inline !important;
  overflow: visible;
  text-overflow: clip;
}

/* ---------- Grouped admin dropdown (inline accordion) ---------- */
.master-dd {
  position: relative;
  width: 100%;
  flex-shrink: 0;
}

.master-dd summary {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
  width: 100%;
}
.master-dd summary::-webkit-details-marker {
  display: none;
}

.master-dd[open] summary {
  color: var(--primary-600) !important;
  background: var(--primary-50);
}

.master-dd .dd-caret {
  transition: transform var(--dur-fast) ease;
  margin-left: auto;
  flex-shrink: 0;
}
.master-dd[open] .dd-caret {
  transform: rotate(180deg);
}

.master-dd-panel {
  display: flex;
  flex-direction: column;
  gap: 1px;
  margin: 2px 0 2px 1.35rem;
  padding-left: 0.6rem;
  border-left: 1px solid var(--border-soft);
}

.master-dd-panel a {
  padding: 0.45rem 0.6rem;
  border-radius: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: all var(--dur-fast) ease;
  white-space: normal;
  line-height: 1.35;
  align-items: flex-start;
}

.master-dd-panel a:hover {
  background: var(--primary-50);
  color: var(--primary-700);
}

/* ---------- Sidebar footer (notifications, user card, logout) ---------- */
.sidebar-foot {
  flex-shrink: 0;
  padding: 0.75rem 0.65rem 1rem;
  border-top: 1px solid var(--glass-border);
}

.notification-wrapper {
  position: relative;
}
.notification-wrapper .notification-bell {
  display: flex;
}

.user-greeting {
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: var(--ink-950);
  border: 1px solid var(--border-soft);
  border-radius: 10px;
  padding: 0.5rem 0.65rem;
  margin: 0.5rem 0;
}

/* ---------- Container ---------- */
.container {
  width: 94%;
  max-width: 1200px;
  margin: 1.5rem auto;
  flex-grow: 1;
}

/* ---------- Mobile topbar + hamburger + scrim ---------- */
.topbar-mobile {
  display: none;
  align-items: center;
  gap: 0.75rem;
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: #ffffff;
  border-bottom: 1px solid var(--glass-border);
  padding: 0.6rem 1rem;
}

.topbar-mobile-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-color);
}

.hamburger {
  display: none;
  background: #ffffff;
  border: 1px solid var(--glass-border);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 9px;
  transition: all var(--dur-med) ease;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}
.hamburger:hover {
  border-color: var(--primary-100);
  background: var(--primary-50);
}
.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-color);
  margin: 4px 0;
  border-radius: 2px;
  transition: all var(--dur-med) ease;
}
nav.app-nav.open ~ .topbar-mobile .hamburger span:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}
nav.app-nav.open ~ .topbar-mobile .hamburger span:nth-child(2) {
  opacity: 0;
}
nav.app-nav.open ~ .topbar-mobile .hamburger span:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
}

.sidebar-scrim {
  display: none;
}

/* ---------- Auth gate: anonymous users only see the login screen ---------- */
body.auth-gate,
body.auth-gate.header-minimized {
  padding-left: 0;
}