* { box-sizing: border-box; }
html { min-height: 100%; scroll-behavior: smooth; }
body {
  min-height: 100%;
  margin: 0;
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: 1.6;
  background:
    radial-gradient(1200px 640px at 12% -12%, rgba(166, 112, 71, 0.18), transparent 58%),
    radial-gradient(860px 520px at 100% 0%, rgba(122, 49, 56, 0.16), transparent 62%),
    radial-gradient(720px 420px at 50% 100%, rgba(197, 162, 96, 0.08), transparent 68%),
    linear-gradient(180deg, var(--bg-0), var(--bg-1) 38%, var(--bg-2) 100%);
  background-attachment: fixed;
  overflow-x: clip;
}
body::before,
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
}
body::before {
  opacity: 0.22;
  background-image:
    linear-gradient(rgba(255,255,255,.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.012) 1px, transparent 1px),
    radial-gradient(circle at 20% 20%, rgba(255,255,255,.05), transparent 30%),
    radial-gradient(circle at 80% 60%, rgba(255,255,255,.03), transparent 24%);
  background-size: 3px 3px, 3px 3px, 420px 420px, 460px 460px;
  mix-blend-mode: soft-light;
}
body::after {
  background:
    radial-gradient(90% 80% at 50% 0%, transparent 55%, rgba(0,0,0,.22) 100%),
    linear-gradient(180deg, transparent 0%, rgba(0,0,0,.18) 100%);
  opacity: 0.72;
}
body.ui-lock { overflow: hidden; }
body.page-leaving { opacity: 0.96; }

img { max-width: 100%; display: block; }
a { color: var(--accent-strong); text-decoration: none; }
a:hover { color: var(--accent-ivory); }
strong, b { color: var(--accent-ivory); }
small, .small { font-size: var(--text-small); color: var(--text-muted); }
code, kbd {
  font-family: var(--font-mono);
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.04);
  color: var(--accent-ivory);
}
code { padding: 2px 6px; }
kbd { padding: 4px 8px; }

h1, h2, h3, h4, h5, h6,
.page-title,
.section-title,
.hero-title,
.public-title,
.brand-name,
.auth-stage-title {
  margin: 0;
  color: var(--text);
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.02;
}

label {
  display: block;
  margin: 0 0 var(--space-2);
  color: var(--text-soft);
  font-weight: 700;
  letter-spacing: 0.01em;
}

input,
textarea,
select,
.input,
.ui-input {
  width: 100%;
  appearance: none;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.01));
  color: var(--text);
  padding: 14px 16px;
  min-height: 48px;
  outline: none;
  transition:
    border-color var(--motion-fast) var(--ease-standard),
    box-shadow var(--motion-fast) var(--ease-standard),
    background var(--motion-fast) var(--ease-standard),
    transform var(--motion-fast) var(--ease-standard);
}
textarea { min-height: 128px; resize: vertical; }
input::placeholder,
textarea::placeholder { color: var(--text-faint); }
input:focus,
textarea:focus,
select:focus,
.input:focus,
.ui-input:focus,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
.input:focus-visible,
.ui-input:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: none;
  border-color: var(--line-accent);
  box-shadow: 0 0 0 4px rgba(197, 162, 96, 0.14), var(--glow-gold);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 46px;
  padding: 11px 18px;
  border-radius: 16px;
  border: 1px solid var(--line-accent);
  background:
    linear-gradient(180deg, rgba(197,162,96,.22), rgba(122,49,56,.18));
  color: var(--accent-ivory);
  box-shadow: var(--glow-gold);
  cursor: pointer;
  font-weight: 700;
  letter-spacing: 0.01em;
  transition:
    transform var(--motion-fast) var(--ease-snappy),
    box-shadow var(--motion-fast) var(--ease-standard),
    border-color var(--motion-fast) var(--ease-standard),
    background var(--motion-fast) var(--ease-standard);
}
.btn:hover {
  transform: translateY(-1px) scale(1.01);
  box-shadow: var(--shadow-2), var(--glow-gold);
}
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.btn.btn-ghost {
  background: rgba(255,255,255,.035);
  border-color: var(--line);
  color: var(--text-soft);
  box-shadow: none;
}
.btn.btn-ghost:hover { color: var(--accent-ivory); border-color: var(--line-accent); }
.btn.primary { border-color: rgba(224, 188, 122, 0.4); }
.btn.danger { background: linear-gradient(180deg, rgba(180, 99, 93, 0.22), rgba(122,49,56,.16)); border-color: rgba(180,99,93,.34); }
.btn-sm { min-height: 38px; padding: 8px 13px; border-radius: 14px; font-size: .875rem; }
.btn-block { width: 100%; }

.container { width: min(100%, calc(var(--content-max) - 120px)); margin: 0 auto; }
.stack { display: flex; flex-direction: column; gap: var(--space-3); }
.stack-xl { display: flex; flex-direction: column; gap: var(--space-6); }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-6); }
.grid-gap-lg { gap: var(--space-7); }
.nowrap { white-space: nowrap; }
.space-top { margin-top: var(--space-4); }
.muted, .hint { color: var(--text-muted); font-size: var(--text-small); }

.topbar {
  position: sticky;
  top: 0;
  z-index: 90;
  padding: 14px 18px 0;
}
.topbar-shell {
  width: min(100%, var(--content-max));
  min-height: var(--topbar-h);
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: 14px 18px;
  border-radius: 28px;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(30,22,19,.78), rgba(18,13,11,.88));
  backdrop-filter: blur(18px) saturate(120%);
  box-shadow: var(--shadow-1);
}
html[data-theme="light"] .topbar-shell {
  background: linear-gradient(180deg, rgba(255,252,247,.82), rgba(247,236,222,.9));
}
body.sidebar-lock { overflow: hidden; }
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: var(--text);
}
.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  border: 1px solid var(--line-accent);
  background: radial-gradient(circle at 30% 30%, rgba(224,188,122,.22), rgba(122,49,56,.18));
  color: var(--accent-ivory);
  box-shadow: var(--glow-gold);
}
.brand-copy { display: flex; flex-direction: column; min-width: 0; }
.brand-kicker {
  font-size: .66rem;
  line-height: 1;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.brand-name {
  font-size: 1.22rem;
  white-space: nowrap;
}
.topnav {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.topnav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 14px;
  border-radius: 999px;
  color: var(--text-soft);
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  border: 1px solid transparent;
  transition: background var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard), border-color var(--motion-fast) var(--ease-standard), transform var(--motion-fast) var(--ease-standard);
}
.topnav-link:hover,
.topnav-link.active {
  color: var(--accent-ivory);
  border-color: var(--line-accent);
  background: linear-gradient(180deg, rgba(197,162,96,.14), rgba(122,49,56,.12));
  transform: translateY(-1px);
}
.top-actions { display: flex; align-items: center; gap: 10px; }
.icon-btn {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.03);
  color: var(--text-soft);
  width: 42px;
  height: 42px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform var(--motion-fast) var(--ease-standard), background var(--motion-fast) var(--ease-standard), border-color var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard);
}
.icon-btn:hover {
  transform: translateY(-1px);
  color: var(--accent-ivory);
  background: rgba(255,255,255,.06);
  border-color: var(--line-accent);
}
.burger { display: none; }
.sidebar-close { display: none; }
.avatar,
.avatar-sm,
.avatar-lg {
  border-radius: 999px;
  border: 1px solid rgba(224,188,122,.22);
  background: radial-gradient(circle at 28% 22%, rgba(224,188,122,.26), rgba(122,49,56,.18));
  color: var(--accent-ivory);
  box-shadow: var(--glow-gold);
  display: grid;
  place-items: center;
  overflow: hidden;
}
.avatar { width: 44px; height: 44px; }
.avatar-sm { width: 46px; height: 46px; flex: 0 0 46px; }
.avatar-lg { width: 78px; height: 78px; flex: 0 0 78px; font-size: 1.4rem; }
.top-login { white-space: nowrap; }

.shell {
  width: min(100%, var(--content-max));
  margin: 0 auto;
  padding: 24px 18px 32px;
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  gap: 22px;
}
.sidebar {
  position: sticky;
  top: calc(var(--topbar-h) + 20px);
  align-self: start;
}
.side-card,
.card,
.widget,
.metric-card,
.action-card,
.msg-list,
.msg-panel,
.modal-card,
.ui-modal-card,
.ui-panel-card,
.quick-panel,
.form-card,
.table-card,
.file-upload,
.file-list {
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--surface-elevated);
  box-shadow: var(--shadow-1);
  backdrop-filter: blur(18px) saturate(120%);
}
.side-card { padding: 18px; }
.sidebar-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.sidebar-title { font-size: 1.06rem; font-weight: 700; }
.sidebar-hint { color: var(--text-muted); font-size: var(--text-small); line-height: 1.5; }
.sidebar-profile { display: flex; gap: 12px; align-items: center; }
.sidebar-profile-name { font-size: 1.04rem; font-weight: 700; }
.sidebar-role-pill { margin-top: 16px; }
.side-group { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--line); }
.side-group-title {
  margin: 0 0 10px 8px;
  color: var(--text-faint);
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .16em;
  font-weight: 800;
}
.side-menu { display: flex; flex-direction: column; gap: 8px; }
.side-link {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 46px;
  padding: 0 14px;
  border-radius: 16px;
  color: var(--text-soft);
  border: 1px solid transparent;
  transition: transform var(--motion-fast) var(--ease-standard), background var(--motion-fast) var(--ease-standard), border-color var(--motion-fast) var(--ease-standard), color var(--motion-fast) var(--ease-standard);
}
.side-link:hover,
.side-link.active {
  color: var(--accent-ivory);
  transform: translateX(2px);
  background: linear-gradient(180deg, rgba(197,162,96,.14), rgba(122,49,56,.12));
  border-color: var(--line-accent);
}
.side-footer { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--line); }
.side-group-mobile-only { display: none; }
.role-pill,
.badge,
.role-badge,
.unread-pill,
.reaction-pill,
.file-chip,
.attachment-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.04);
  color: var(--text-soft);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .02em;
}
.role-admin { background: rgba(180,99,93,.12); border-color: rgba(180,99,93,.28); color: #efc0bb; }
.role-teacher { background: rgba(126,162,127,.12); border-color: rgba(126,162,127,.26); color: #d7ead7; }
.role-user { background: rgba(131,151,180,.12); border-color: rgba(131,151,180,.26); color: #d7e1f3; }
.badge-soft { background: rgba(255,255,255,.05); color: var(--text-soft); }

.main { min-width: 0; }
.main-inner { display: flex; flex-direction: column; gap: var(--space-6); }
.page-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-5);
  flex-wrap: wrap;
}
.page-head.compact { margin-bottom: 0; }
.page-title { font-size: var(--display-page); }
.page-subtitle,
.page-sub {
  max-width: 760px;
  margin-top: 8px;
  color: var(--text-muted);
}
.page-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.section-head.compact { margin-bottom: 12px; }
.section-title { font-size: var(--title-2); }
.section-sub { color: var(--text-muted); font-size: var(--text-small); margin-top: 6px; }

.card { padding: 22px; }
.glass-card {
  background:
    linear-gradient(135deg, rgba(255,255,255,.06), transparent 48%),
    linear-gradient(180deg, rgba(197,162,96,.1), rgba(122,49,56,.06) 40%, rgba(20,14,12,.92));
  box-shadow: var(--shadow-2), inset 0 1px 0 rgba(255,255,255,.04);
}
.flash {
  border-radius: 18px;
  padding: 14px 16px;
  border: 1px solid var(--line);
}
.flash.ok { background: rgba(126,162,127,.14); border-color: rgba(126,162,127,.26); }
.flash.err { background: rgba(180,99,93,.14); border-color: rgba(180,99,93,.26); }
.empty {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 8px;
  min-height: 180px;
  padding: 22px;
  border-radius: 22px;
  border: 1px dashed var(--line-strong);
  background: rgba(255,255,255,.025);
}
.empty.compact { min-height: 0; padding: 16px; }
.empty.tall { min-height: 320px; }
.empty-title { font-family: var(--font-display); font-size: 1.45rem; }
.empty-text { color: var(--text-muted); max-width: 48ch; }

.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(4, 2, 2, 0.58);
  backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity var(--motion-base) var(--ease-standard);
  z-index: 80;
}
.sidebar-overlay.show { opacity: 1; }

.ui-modal,
.ui-panel,
.modal {
  position: fixed;
  inset: 0;
  z-index: 120;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(7,4,4,.6);
  backdrop-filter: blur(8px);
}
.ui-modal-card,
.ui-panel-card,
.modal-card {
  width: min(100%, 760px);
  padding: 22px;
  box-shadow: var(--shadow-3);
}
.ui-panel-card { width: min(100%, 520px); justify-self: end; height: min(100%, 84vh); display: flex; flex-direction: column; }
.ui-modal-head,
.ui-panel-head,
.modal-head,
.msg-head,
.msg-list-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: 16px;
}
.ui-modal-title,
.modal-title,
.msg-title,
.msg-list-title,
.file-upload-title,
.side-title { font-family: var(--font-display); font-size: 1.45rem; }
.ui-modal-sub,
.msg-sub,
.msg-list-sub,
.file-upload-sub { color: var(--text-muted); font-size: var(--text-small); margin-top: 4px; }
.ui-modal-body,
.ui-panel-body,
.modal-body { display: flex; flex-direction: column; gap: 14px; min-height: 0; }
.ui-results { display: flex; flex-direction: column; gap: 10px; min-height: 0; overflow: auto; }
.ui-item,
.ui-note {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
  padding: 14px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.035);
}
.ui-item:hover { border-color: var(--line-accent); background: rgba(255,255,255,.05); }
.ui-item-badge {
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  border: 1px solid var(--line-accent);
  color: var(--accent-ivory);
  font-size: .74rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: .12em;
}
.ui-item-title,
.ui-note-title { font-weight: 700; color: var(--text); }
.ui-item-sub,
.ui-note-sub,
.ui-empty { color: var(--text-muted); font-size: var(--text-small); }

.table-wrap { overflow: auto; }
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: .95rem;
}
.table th,
.table td {
  padding: 14px 12px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.table th {
  color: var(--text-faint);
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .16em;
  font-weight: 800;
}
.table-zebra tbody tr:nth-child(even) { background: rgba(255,255,255,.02); }
.inline-form,
.btn-row,
.row,
.check-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.check-list { display: flex; flex-direction: column; gap: 12px; }
.check-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255,255,255,.03);
  border: 1px solid var(--line);
}

.form-grid.two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.file-control {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 14px;
  border-radius: 18px;
  border: 1px dashed var(--line-strong);
  background: rgba(255,255,255,.025);
  cursor: pointer;
}
.file-control input[type="file"] { display: none; }
.file-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(197,162,96,.18), rgba(122,49,56,.12));
  border: 1px solid var(--line-accent);
  color: var(--accent-ivory);
  font-weight: 700;
}
.file-name { color: var(--text-muted); font-size: var(--text-small); }

.modal { opacity: 0; pointer-events: none; transition: opacity var(--motion-fast) var(--ease-standard); }
.modal.open { opacity: 1; pointer-events: auto; }
.modal-backdrop { position: absolute; inset: 0; }
.modal-card { position: relative; max-height: 88vh; overflow: hidden; }
.modal-body { overflow: auto; }
.modal-img,
.modal-media,
.modal-frame { width: 100%; min-height: 50vh; border: 0; border-radius: 18px; background: rgba(0,0,0,.32); }
.modal-foot { display: flex; justify-content: flex-end; gap: 10px; margin-top: 14px; flex-wrap: wrap; }

.auth-stage {
  min-height: 100vh;
  display: grid;
  padding: 24px;
}
.auth-stage-inner {
  width: min(100%, 1340px);
  margin: auto;
  display: grid;
  grid-template-columns: minmax(320px, .92fr) minmax(420px, .98fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: stretch;
}
.auth-stage-copy {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: clamp(28px, 5vw, 56px);
  border-radius: 34px;
  border: 1px solid var(--line);
  background:
    radial-gradient(560px 320px at 20% 20%, rgba(197,162,96,.22), transparent 64%),
    radial-gradient(520px 320px at 82% 22%, rgba(122,49,56,.22), transparent 64%),
    linear-gradient(180deg, rgba(32,23,20,.86), rgba(14,10,9,.94));
  box-shadow: var(--shadow-2);
}
.auth-stage-title {
  margin-top: 16px;
  font-size: clamp(2.4rem, 5vw, 4.6rem);
  max-width: 10ch;
}
.auth-stage-text {
  margin-top: 18px;
  max-width: 52ch;
  color: var(--text-soft);
}
.auth-wrap { display: grid; }

@media (max-width: 1180px) {
  .shell { grid-template-columns: 1fr; }
  .sidebar { position: fixed; top: 0; left: 0; bottom: 0; width: min(88vw, 360px); z-index: 85; transform: translateX(-108%); transition: transform var(--motion-base) var(--ease-snappy); padding: 18px 12px; }
  body[data-sidebar-mode="mobile"][data-sidebar-state="open"] .sidebar { transform: translateX(0); }
  .sidebar .side-card { height: calc(100dvh - 36px); overflow: auto; }
  .sidebar-close,
  .burger { display: inline-flex; }
}

@media (max-width: 1080px) {
  .topbar-shell { flex-wrap: wrap; }
  .topnav { order: 3; width: 100%; justify-content: flex-start; overflow: auto; padding-bottom: 2px; }
  .topnav::-webkit-scrollbar { display: none; }
  .container { width: 100%; }
  .auth-stage-inner { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .grid-2,
  .form-grid.two { grid-template-columns: 1fr; }
  .topbar { padding: 10px 10px 0; }
  .topbar-shell {
    min-height: 72px;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 22px;
  }
  .brand { gap: 10px; min-width: 0; }
  .brand-mark { width: 40px; height: 40px; border-radius: 14px; }
  .brand-kicker { display: none; }
  .brand-name { margin-top: 0; font-size: .98rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .topnav { display: none; }
  .top-actions { gap: 8px; }
  .top-actions .icon-btn,
  .burger,
  .avatar { width: 38px; height: 38px; }
  .shell { padding: 14px 10px 20px; }
  .sidebar { width: min(92vw, 360px); padding: 10px; }
  .sidebar .side-card { height: calc(100dvh - 20px); padding: 16px 14px; }
  .side-group-mobile-only { display: block; }
  .sidebar-hint { display: none; }
  .sidebar-profile-name { font-size: 1rem; }
  .main-inner { gap: 18px; }
  .page-head { margin-bottom: 12px; }
  .page-subtitle { font-size: .92rem; line-height: 1.45; }
  .ui-panel { padding: 0; }
  .ui-panel-card { width: 100%; height: 100%; border-radius: 0; justify-self: stretch; }
  .ui-modal-card,
  .modal-card { width: 100%; max-height: calc(100vh - 20px); }
}

@media (max-width: 560px) {
  .top-actions > :not(.avatar):not(.top-login):nth-child(2) { display: none; }
  .page-subtitle,
  .section-sub { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}


html[data-theme="light"] body {
  background:
    radial-gradient(980px 520px at 12% -8%, rgba(185, 127, 68, 0.12), transparent 58%),
    radial-gradient(760px 420px at 100% 0%, rgba(139, 73, 80, 0.1), transparent 60%),
    radial-gradient(620px 340px at 50% 100%, rgba(157, 106, 53, 0.07), transparent 68%),
    linear-gradient(180deg, var(--bg-0), var(--bg-1) 42%, var(--bg-2) 100%);
}
html[data-theme="light"] body::before {
  opacity: 0.1;
  background-image:
    linear-gradient(rgba(81, 54, 35, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(81, 54, 35, 0.015) 1px, transparent 1px),
    radial-gradient(circle at 20% 20%, rgba(185, 127, 68, 0.05), transparent 30%),
    radial-gradient(circle at 80% 60%, rgba(139, 73, 80, 0.035), transparent 24%);
  mix-blend-mode: multiply;
}
html[data-theme="light"] body::after {
  background:
    radial-gradient(90% 80% at 50% 0%, transparent 62%, rgba(110, 77, 49, 0.055) 100%),
    linear-gradient(180deg, rgba(255,255,255,.14) 0%, rgba(125,95,68,.04) 100%);
  opacity: 0.78;
}
html[data-theme="light"] a:hover { color: var(--accent); }
html[data-theme="light"] strong,
html[data-theme="light"] b { color: var(--text); }
html[data-theme="light"] code,
html[data-theme="light"] kbd {
  background: rgba(157, 106, 53, 0.08);
}
html[data-theme="light"] input,
html[data-theme="light"] textarea,
html[data-theme="light"] select,
html[data-theme="light"] .input,
html[data-theme="light"] .ui-input {
  background: linear-gradient(180deg, rgba(255,255,255,.96), rgba(248, 240, 231, .98));
  border-color: rgba(78, 50, 31, 0.1);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.65);
}
html[data-theme="light"] .btn {
  background: linear-gradient(180deg, rgba(185,127,68,.18), rgba(139,73,80,.09));
  color: var(--text);
}
html[data-theme="light"] .btn.btn-ghost {
  background: rgba(255,255,255,.68);
  color: var(--text-soft);
  border-color: rgba(78, 50, 31, 0.12);
}
html[data-theme="light"] .btn.btn-ghost:hover {
  color: var(--text);
  background: rgba(255,255,255,.88);
}
html[data-theme="light"] .topbar-shell {
  border-color: rgba(78, 50, 31, 0.1);
  box-shadow: 0 10px 28px rgba(89, 55, 30, 0.08);
}
html[data-theme="light"] .icon-btn {
  background: rgba(255,255,255,.64);
  border-color: rgba(78, 50, 31, 0.1);
  color: var(--text-soft);
}
html[data-theme="light"] .icon-btn:hover {
  background: rgba(255,255,255,.9);
  color: var(--text);
}
html[data-theme="light"] .brand-mark {
  background: radial-gradient(circle at 30% 30%, rgba(185,127,68,.16), rgba(139,73,80,.09));
}
html[data-theme="light"] .side-card,
html[data-theme="light"] .card,
html[data-theme="light"] .widget,
html[data-theme="light"] .metric-card,
html[data-theme="light"] .action-card,
html[data-theme="light"] .msg-list,
html[data-theme="light"] .msg-panel,
html[data-theme="light"] .modal-card,
html[data-theme="light"] .ui-modal-card,
html[data-theme="light"] .ui-panel-card,
html[data-theme="light"] .ui-panel,
html[data-theme="light"] .quick-panel,
html[data-theme="light"] .form-card,
html[data-theme="light"] .table-card,
html[data-theme="light"] .file-upload,
html[data-theme="light"] .file-list {
  border-color: rgba(78, 50, 31, 0.1);
  box-shadow: var(--shadow-1), inset 0 1px 0 rgba(255,255,255,.55);
}
html[data-theme="light"] .glass-card {
  background:
    linear-gradient(135deg, rgba(255,255,255,.72), rgba(255,255,255,.24) 48%),
    linear-gradient(180deg, rgba(185,127,68,.08), rgba(139,73,80,.04) 40%, rgba(255,251,246,.96));
}
html[data-theme="light"] .empty {
  background: rgba(255,255,255,.62);
}
html[data-theme="light"] .sidebar-overlay { background: rgba(86, 63, 44, 0.16); }
html[data-theme="light"] .ui-modal,
html[data-theme="light"] .ui-panel,
html[data-theme="light"] .modal {
  background: rgba(127, 99, 74, 0.18);
}
html[data-theme="light"] .modal-frame { background: rgba(115, 84, 56, 0.16); }
html[data-theme="light"] .auth-stage-copy {
  background:
    radial-gradient(560px 320px at 20% 20%, rgba(185,127,68,.16), transparent 64%),
    radial-gradient(520px 320px at 82% 22%, rgba(139,73,80,.14), transparent 64%),
    linear-gradient(180deg, rgba(255,251,246,.96), rgba(245,236,226,.98));
}

/* =====================================================================
   Performance and stability hotfix
   ===================================================================== */
body[data-sidebar-mode="mobile"][data-sidebar-state="open"] .sidebar,
body.sidebar-open .sidebar {
  transform: translateX(0);
  opacity: 1;
  pointer-events: auto;
}

.topbar-shell,
.sidebar,
.ui-modal-card,
.ui-panel-card,
.vinyl-disc,
.album-sleeve {
  transform: translateZ(0);
  backface-visibility: hidden;
}

.card,
.widget,
.side-card,
.ui-modal-card,
.ui-panel-card,
.modal-card,
.msg-list,
.msg-panel,
.role-item,
.action-card,
.metric-card {
  backdrop-filter: none;
}

.topbar-shell {
  backdrop-filter: blur(10px) saturate(110%);
}

.sidebar-overlay {
  backdrop-filter: blur(2px);
}

.ui-modal,
.ui-panel,
.modal {
  background: rgba(7, 4, 4, 0.52);
  backdrop-filter: blur(4px);
}

.ui-panel-card {
  width: min(100%, 460px);
}

.side-card,
.card,
.quick-panel,
.ui-modal-card,
.ui-panel-card,
.table-card,
.profile-form-card,
.profile-security-card,
.profile-side-card,
.music-track-card,
.music-player,
.music-upload,
.music-library {
  contain: layout paint;
}

@supports (content-visibility: auto) {
  .feed > *,
  .action-grid > *,
  .agenda-list > *,
  .music-library-grid > *,
  .lessons-library > *,
  .table-card,
  .quick-panel,
  .profile-form-card,
  .profile-security-card,
  .profile-side-card {
    content-visibility: auto;
    contain-intrinsic-size: 280px;
  }
}

img[loading="lazy"] {
  content-visibility: auto;
}

@media (max-width: 860px) {
  .topbar-shell {
    backdrop-filter: none;
  }

  .ui-modal,
  .ui-panel,
  .modal,
  .sidebar-overlay {
    backdrop-filter: none;
  }

  .ui-panel-card {
    width: 100%;
  }
}


@media (max-width: 860px) {
  body::before,
  body::after {
    opacity: 0.42;
  }
}