.app-nav-cluster {
    min-width: 0;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.app-nav-cluster > .app-nav-back,
.app-nav-cluster > .app-nav-brand {
    min-height: 30px;
    display: inline-flex;
    align-items: center;
    border: 0;
    text-decoration: none;
    cursor: pointer;
}

.app-nav-cluster > .app-nav-back {
    width: 34px;
    min-width: 34px;
    justify-content: center;
    padding: 0;
    border: 1px solid rgba(22, 79, 71, .1);
    border-radius: 11px;
    background: rgba(255, 255, 255, .5);
    color: #285f57;
    box-shadow: inset 0 1px rgba(255,255,255,.7);
}

.app-nav-cluster > .app-nav-back:hover,
.app-nav-cluster > .app-nav-back:focus-visible {
    outline: 0;
    background: rgba(15, 118, 110, .1);
}

.app-nav-chevron {
    width: 10px;
    height: 10px;
    margin-left: 4px;
    border-left: 1.7px solid currentColor;
    border-bottom: 1.7px solid currentColor;
    transform: rotate(45deg);
}

.app-nav-cluster > .app-nav-brand {
    gap: 6px;
    padding: 3px 7px 3px 4px;
    border-radius: 9px;
    background: transparent;
    color: #174a46;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: -.01em;
    white-space: nowrap;
}

.app-shell-header {
    --app-shell-height: 52px;
    color: #173d38;
    background: rgba(247, 250, 248, .7) !important;
    border-bottom: 1px solid rgba(24, 76, 69, .065) !important;
    box-shadow: 0 8px 30px rgba(22, 60, 54, .035) !important;
    -webkit-backdrop-filter: blur(28px) saturate(1.16) !important;
    backdrop-filter: blur(28px) saturate(1.16) !important;
}

.app-shell-header.topbar > .topbar-inner,
.app-shell-header.navbar > .navbar-content,
.app-shell-header.unit-shell-header > .unit-shell-header-inner {
    height: var(--app-shell-height) !important;
    min-height: var(--app-shell-height) !important;
    padding-top: 5px !important;
    padding-bottom: 5px !important;
}

.app-shell-header.topbar > .topbar-inner { align-items: center !important; flex-direction: row !important; }

.app-shell-header.navbar { min-height: var(--app-shell-height) !important; padding-top: 0 !important; padding-bottom: 0 !important; }
.app-shell-header.unit-shell-header { height: var(--app-shell-height) !important; min-height: var(--app-shell-height) !important; }
.app-shell-header.toolbar { min-height: var(--app-shell-height) !important; padding-top: 5px !important; padding-bottom: 5px !important; }

.app-shell-header .app-nav-cluster { gap: 5px; }
.app-shell-header .app-nav-back { width: 32px; min-width: 32px; min-height: 32px; background: rgba(255,255,255,.38); }
.app-shell-header .app-nav-brand { min-height: 32px; padding: 3px 7px 3px 4px; color: #174a43 !important; font-size: 12px; }

.app-nav-context {
    min-width: 0;
    display: grid;
    gap: 2px;
    margin-left: 9px;
    padding-left: 15px;
    border-left: 1px solid rgba(24, 76, 69, .11);
    line-height: 1.05;
}

.app-account-chip {
    min-width: 0;
    height: 34px;
    min-height: 34px;
    display: grid;
    grid-template-columns: 26px minmax(0, auto);
    align-items: center;
    gap: 7px;
    padding: 3px 8px 3px 4px;
    border: 1px solid rgba(29, 85, 77, .09);
    border-radius: 12px;
    background: rgba(255,255,255,.5);
    color: #274d47;
    box-shadow: inset 0 1px rgba(255,255,255,.7);
    text-decoration: none;
    transition: background-color .2s ease, border-color .2s ease, transform .2s ease;
}

.app-account-chip:hover,
.app-account-chip:focus-visible { outline: 0; border-color: rgba(27,102,92,.18); background: rgba(255,255,255,.84); transform: translateY(-1px); }

.app-account-avatar {
    width: 26px;
    height: 26px;
    display: grid;
    place-items: center;
    overflow: hidden;
    border-radius: 9px;
    background: linear-gradient(145deg, var(--account-avatar, #188b7f), color-mix(in srgb, var(--account-avatar, #188b7f) 76%, #486ca7));
    color: #fff;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,.28), 0 5px 12px rgba(19,81,72,.12);
    font-size: 12px;
    font-weight: 760;
    object-fit: cover;
}

.app-account-avatar-wrap {
    position: relative;
    width: 26px;
    height: 26px;
    display: grid;
    place-items: center;
    overflow: visible;
}

.account-type-vip-student {
    --account-identity-badge: #dcad3d;
    --account-identity-ink: #4b3000;
    --account-identity-role: #704b0c;
    --account-identity-ring: rgba(196, 139, 23, .46);
    --account-identity-frame: linear-gradient(135deg, #fff3b2 0%, #e9b83f 34%, #9b6206 64%, #f8da78 100%);
    --account-identity-glow: rgba(209, 157, 39, .2);
    --account-identity-chip: linear-gradient(135deg, rgba(255, 254, 248, .94), rgba(255, 244, 204, .82));
    --account-identity-label: linear-gradient(135deg, #fff1b5, #eabe49);
    --account-identity-label-border: rgba(151, 94, 3, .28);
    --account-identity-label-ink: #563500;
    --account-identity-name: #75500b;
    --account-identity-name-on-hero: #ffefb2;
    --account-identity-name-on-surface: #704500;
    --account-identity-label-on-hero: #563500;
    --account-identity-label-on-surface: #563500;
}
.account-type-teacher {
    --account-identity-badge: #6257c7;
    --account-identity-ink: #fff;
    --account-identity-role: #5547a4;
    --account-identity-ring: rgba(98, 87, 199, .4);
    --account-identity-frame: linear-gradient(135deg, #dcd8ff 0%, #8275dc 46%, #493c9b 100%);
    --account-identity-glow: rgba(98, 87, 199, .16);
    --account-identity-chip: linear-gradient(135deg, rgba(249, 248, 255, .94), rgba(236, 233, 255, .82));
    --account-identity-label: #ebe8ff;
    --account-identity-label-border: rgba(98, 87, 199, .22);
    --account-identity-label-ink: #4b3e98;
    --account-identity-name: #4f438f;
    --account-identity-name-on-hero: #ebe8ff;
    --account-identity-name-on-surface: #443884;
    --account-identity-label-on-hero: #493c96;
    --account-identity-label-on-surface: #5547a4;
}
.account-type-admin {
    --account-identity-badge: #b84c73;
    --account-identity-ink: #fff;
    --account-identity-role: #963b64;
    --account-identity-ring: rgba(184, 76, 115, .4);
    --account-identity-frame: linear-gradient(135deg, #ffd6e5 0%, #d96b95 48%, #943356 100%);
    --account-identity-glow: rgba(184, 76, 115, .15);
    --account-identity-chip: linear-gradient(135deg, rgba(255, 250, 252, .94), rgba(255, 232, 241, .82));
    --account-identity-label: #ffe5ef;
    --account-identity-label-border: rgba(184, 76, 115, .22);
    --account-identity-label-ink: #883052;
    --account-identity-name: #883b5a;
    --account-identity-name-on-hero: #ffe3ed;
    --account-identity-name-on-surface: #7d294b;
    --account-identity-label-on-hero: #873052;
    --account-identity-label-on-surface: #963b64;
}
.account-type-super-admin {
    --account-identity-badge: #35294e;
    --account-identity-ink: #ffe39a;
    --account-identity-role: #5b426c;
    --account-identity-ring: rgba(207, 158, 42, .48);
    --account-identity-frame: linear-gradient(135deg, #f8d76f 0%, #9a79b8 42%, #3f3058 70%, #e5b83f 100%);
    --account-identity-glow: rgba(118, 81, 143, .18);
    --account-identity-chip: linear-gradient(135deg, rgba(246, 241, 252, .94), rgba(255, 244, 207, .82));
    --account-identity-label: linear-gradient(135deg, #ebe2f5, #ffe7a1);
    --account-identity-label-border: rgba(158, 116, 31, .3);
    --account-identity-label-ink: #4e395f;
    --account-identity-name: #59426c;
    --account-identity-name-on-hero: #ffe9a9;
    --account-identity-name-on-surface: #493456;
    --account-identity-label-on-hero: #4e395f;
    --account-identity-label-on-surface: #5b426c;
}

.app-account-avatar-wrap::before,
.admin-directory-avatar-wrap::before,
.profile-page .avatar-section::before {
    content: none;
    position: absolute;
    z-index: 2;
    inset: -2px;
    padding: 2px;
    border-radius: 11px;
    background: var(--account-identity-frame);
    pointer-events: none;
    filter: drop-shadow(0 2px 3px var(--account-identity-glow));
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
}
.account-type-vip-student .app-account-avatar-wrap::before,
.account-type-teacher .app-account-avatar-wrap::before,
.account-type-admin .app-account-avatar-wrap::before,
.account-type-super-admin .app-account-avatar-wrap::before,
.admin-directory-avatar-wrap:is(.account-type-vip-student, .account-type-teacher, .account-type-admin, .account-type-super-admin)::before,
.profile-page .avatar-section:is(.account-type-vip-student, .account-type-teacher, .account-type-admin, .account-type-super-admin)::before { content: ""; }

.app-account-chip:is(.account-type-vip-student, .account-type-teacher, .account-type-admin, .account-type-super-admin) {
    border-color: var(--account-identity-ring);
    background: var(--account-identity-chip);
    box-shadow: inset 0 1px rgba(255,255,255,.84), 0 5px 14px var(--account-identity-glow);
}
.app-account-chip:is(.account-type-vip-student, .account-type-teacher, .account-type-admin, .account-type-super-admin) .app-account-avatar {
    box-shadow: inset 0 0 0 1px rgba(255,255,255,.3), 0 5px 12px rgba(19,81,72,.12);
}
.app-account-chip:is(.account-type-vip-student, .account-type-teacher, .account-type-admin, .account-type-super-admin) .account-role-label {
    width: max-content;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 1px 5px;
    border: 1px solid var(--account-identity-label-border);
    border-radius: 999px;
    background: var(--account-identity-label);
    color: var(--account-identity-label-ink);
    box-shadow: inset 0 1px rgba(255,255,255,.62);
    font-weight: 820;
    letter-spacing: .075em;
}
.app-account-chip:is(.account-type-vip-student, .account-type-teacher, .account-type-admin, .account-type-super-admin) .account-role-label::before {
    width: 4px;
    height: 4px;
    flex: 0 0 auto;
    border-radius: 1px;
    background: var(--account-identity-badge);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--account-identity-badge) 16%, transparent);
    content: "";
    transform: rotate(45deg);
}
.app-account-chip:is(.account-type-vip-student, .account-type-teacher, .account-type-admin, .account-type-super-admin) .app-account-copy strong {
    color: var(--account-identity-name);
    font-weight: 780;
}

.app-account-copy { min-width: 0; display: grid; gap: 2px; line-height: 1; }
.app-account-copy strong { max-width: 116px; overflow: hidden; color: #294c46; font-size: 10.5px; font-weight: 710; text-overflow: ellipsis; white-space: nowrap; }
.app-account-copy small { color: #8b9895; font-size: 7.5px; font-weight: 680; letter-spacing: .09em; text-transform: uppercase; }

.app-shell-header .account-badge,
.app-shell-header .user-badge,
.app-shell-header .account-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    max-width: none;
    width: auto !important;
    padding: 0;
    border: 0;
    background: transparent;
    color: inherit;
    overflow: visible;
}

.app-shell-header .account-admin-link {
    min-height: 32px;
    display: inline-flex;
    align-items: center;
    padding: 0 11px;
    border: 1px solid rgba(28,92,83,.1);
    border-radius: 12px;
    background: rgba(33,112,101,.075);
    color: #28665d;
    font-size: 9px;
    font-weight: 700;
    text-decoration: none;
}

.admin-preview-banner {
    position: fixed;
    top: 68px;
    left: 50%;
    z-index: 1800;
    min-height: 38px;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 5px 6px 5px 14px;
    border: 1px solid rgba(35,84,76,.12);
    border-radius: 14px;
    background: rgba(250,252,251,.95);
    color: #4a625d;
    box-shadow: 0 14px 34px rgba(12,52,46,.13), inset 0 1px rgba(255,255,255,.84);
    font: 680 11px/1.2 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", sans-serif;
    transform: translateX(-50%);
    -webkit-backdrop-filter: blur(20px) saturate(1.12);
    backdrop-filter: blur(20px) saturate(1.12);
}
.admin-preview-banner button {
    min-height: 28px;
    padding: 0 10px;
    border: 0;
    border-radius: 9px;
    background: #1d665c;
    color: #fff;
    font: inherit;
    white-space: nowrap;
    cursor: pointer;
}
.admin-preview-banner button:hover,
.admin-preview-banner button:focus-visible { outline: 0; background: #15564e; box-shadow: 0 0 0 3px rgba(29,102,92,.13); }

.app-nav-context strong {
    overflow: hidden;
    color: #244640;
    font-size: 11.5px;
    font-weight: 700;
    letter-spacing: -.008em;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.app-nav-context small {
    overflow: hidden;
    color: #879490;
    font-size: 8px;
    font-weight: 650;
    letter-spacing: .09em;
    text-overflow: ellipsis;
    text-transform: uppercase;
    white-space: nowrap;
}

.legacy-unit-shell-identity { min-width: 0; display: flex; align-items: center; }
.legacy-unit-shell-header { min-height: var(--app-shell-height); }
.legacy-unit-shell-header > div { min-height: var(--app-shell-height); }

.app-nav-cluster > .app-nav-brand:hover,
.app-nav-cluster > .app-nav-brand:focus-visible {
    outline: 0;
    background: rgba(15, 118, 110, .08);
}

.app-nav-mark {
    width: 19px;
    height: 19px;
    flex: 0 0 auto;
    border-radius: 7px;
    background: url("../brand/physicshub-mark.svg?v=20260827-zyh-final-v2") center / cover no-repeat;
    box-shadow: 0 4px 10px rgba(10, 49, 44, .13);
}

.app-nav-mark::before,
.app-nav-mark::after {
    content: none;
}

.physics-language-switch {
    position: relative;
    isolation: isolate;
    flex: 0 0 auto;
    height: 30px;
    display: inline-grid;
    grid-template-columns: repeat(2, 1fr);
    align-items: center;
    gap: 1px;
    padding: 2px;
    border: 1px solid rgba(26, 80, 72, .1);
    border-radius: 11px;
    background: rgba(255, 255, 255, .46);
    box-shadow: inset 0 1px rgba(255, 255, 255, .72), 0 5px 16px rgba(20, 66, 59, .035);
    -webkit-backdrop-filter: blur(16px) saturate(1.14);
    backdrop-filter: blur(16px) saturate(1.14);
}

.physics-language-switch button {
    position: relative;
    z-index: 1;
    width: 27px;
    height: 24px;
    display: grid;
    place-items: center;
    margin: 0;
    padding: 0;
    border: 0;
    border-radius: 8px;
    background: transparent;
    color: #81908c;
    font: 700 var(--display-preference-font, 10.5px)/1 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", sans-serif;
    letter-spacing: .025em;
    cursor: pointer;
    transition: color .18s ease, background-color .18s ease, box-shadow .18s ease, transform .18s ease;
}

.physics-language-switch button:hover,
.physics-language-switch button:focus-visible {
    outline: 0;
    color: #285f57;
    background: rgba(255, 255, 255, .45);
}

.physics-language-switch button:focus-visible {
    box-shadow: 0 0 0 2px rgba(14, 133, 119, .2);
}

.physics-language-switch button.is-active {
    color: #194e47;
    background: rgba(255, 255, 255, .9);
    box-shadow: 0 2px 7px rgba(21, 69, 62, .1), inset 0 0 0 1px rgba(20, 88, 78, .045);
}

#topNav .nav-container > .physics-language-switch {
    margin-left: auto;
    margin-right: 5px;
}

.physics-text-size-switch {
    position: relative;
    isolation: isolate;
    flex: 0 0 auto;
    color: #315e57;
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", sans-serif;
}

.physics-text-size-trigger {
    min-width: 103px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 0 9px;
    border: 1px solid rgba(26, 80, 72, .1);
    border-radius: 11px;
    background: rgba(255, 255, 255, .46);
    color: #758783;
    box-shadow: inset 0 1px rgba(255,255,255,.72), 0 5px 16px rgba(20,66,59,.035);
    font: 680 var(--display-preference-font, 10.5px)/1 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", sans-serif;
    white-space: nowrap;
    cursor: pointer;
    -webkit-backdrop-filter: blur(16px) saturate(1.14);
    backdrop-filter: blur(16px) saturate(1.14);
    transition: color .18s ease, background-color .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.physics-text-size-trigger strong { color: #285f57; font: inherit; font-weight: 680; }
.physics-text-size-disclosure {
    width: 6px;
    height: 6px;
    margin: -3px 1px 0 2px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    opacity: .62;
    transform: rotate(45deg);
    transition: transform .18s ease, margin .18s ease;
}
.physics-text-size-switch.is-open .physics-text-size-disclosure { margin-top: 3px; transform: rotate(225deg); }
.physics-text-size-trigger:hover,
.physics-text-size-trigger:focus-visible,
.physics-text-size-switch.is-open .physics-text-size-trigger {
    outline: 0;
    border-color: rgba(20,103,91,.17);
    background: rgba(255,255,255,.75);
    color: #315f58;
}
.physics-text-size-trigger:focus-visible { box-shadow: 0 0 0 2px rgba(14,133,119,.18); }

.physics-text-size-menu {
    position: absolute;
    top: calc(100% + 7px);
    right: 0;
    z-index: 1400;
    width: 148px;
    display: grid;
    gap: 3px;
    padding: 5px;
    border: 1px solid rgba(23,78,69,.1);
    border-radius: 13px;
    background: rgba(250,252,251,.96);
    box-shadow: 0 16px 38px rgba(13,54,48,.16), inset 0 1px rgba(255,255,255,.84);
    -webkit-backdrop-filter: blur(22px) saturate(1.12);
    backdrop-filter: blur(22px) saturate(1.12);
}
.physics-text-size-menu[hidden] { display: none; }
.physics-text-size-menu button {
    position: relative;
    width: 100%;
    min-height: 34px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: 0 30px 0 10px;
    border: 0;
    border-radius: 9px;
    background: transparent;
    color: #526a65;
    font: 680 12px/1 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", sans-serif;
    white-space: nowrap;
    cursor: pointer;
}
.physics-text-size-menu button::after {
    content: "";
    position: absolute;
    right: 11px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: transparent;
    box-shadow: 0 0 0 1px rgba(28,91,81,.16);
}
.physics-text-size-menu button:hover,
.physics-text-size-menu button:focus-visible { outline: 0; background: rgba(31,112,100,.07); color: #215e55; }
.physics-text-size-menu button.is-active { background: rgba(31,112,100,.09); color: #164f47; }
.physics-text-size-menu button.is-active::after { background: #2b887c; box-shadow: 0 0 0 3px rgba(43,136,124,.11); }

#topNav .nav-container > .physics-text-size-switch { margin-right: 10px; }

#topNav:not(.scrolled) .physics-language-switch,
#topNav:not(.scrolled) .physics-text-size-trigger {
    border-color: rgba(255, 255, 255, .16);
    background: rgba(13, 44, 58, .2);
    box-shadow: inset 0 1px rgba(255, 255, 255, .11), 0 7px 20px rgba(2, 17, 29, .08);
}

#topNav:not(.scrolled) .physics-language-switch button,
#topNav:not(.scrolled) .physics-text-size-trigger {
    color: rgba(255, 255, 255, .6);
}
#topNav:not(.scrolled) .physics-text-size-trigger strong { color: rgba(255,255,255,.88); }

#topNav:not(.scrolled) .physics-language-switch button:hover,
#topNav:not(.scrolled) .physics-language-switch button:focus-visible,
#topNav:not(.scrolled) .physics-text-size-trigger:hover,
#topNav:not(.scrolled) .physics-text-size-trigger:focus-visible,
#topNav:not(.scrolled) .physics-text-size-switch.is-open .physics-text-size-trigger {
    color: #fff;
    background: rgba(255, 255, 255, .09);
}

#topNav:not(.scrolled) .physics-language-switch button.is-active {
    color: #153f3b;
    background: rgba(255, 255, 255, .92);
    box-shadow: 0 3px 10px rgba(0, 0, 0, .12);
}

.auth-modal-brand > .auth-language-switch {
    margin-left: auto;
}

.app-nav-on-dark > .app-nav-back,
.app-nav-on-dark > .app-nav-brand {
    color: #fff;
}

.app-nav-on-dark > .app-nav-back:hover,
.app-nav-on-dark > .app-nav-back:focus-visible,
.app-nav-on-dark > .app-nav-brand:hover,
.app-nav-on-dark > .app-nav-brand:focus-visible {
    background: rgba(255,255,255,.13);
}

.app-nav-on-dark .app-nav-mark {
    box-shadow: 0 5px 13px rgba(0,0,0,.2), 0 0 0 1px rgba(255,255,255,.16);
}

.app-unit-identity {
    position: relative;
    overflow: hidden;
    padding: clamp(42px, 6vw, 76px) 24px;
    color: #fff;
    background: var(--unit-hero-background, linear-gradient(135deg, #0f172a, #1e40af));
}

.app-unit-identity::after {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(115deg, rgba(255,255,255,.08), transparent 38%);
}

.app-unit-identity-inner {
    position: relative;
    z-index: 1;
    width: min(1120px, 100%);
    margin: 0 auto;
}

.app-unit-identity-kicker {
    margin: 0 0 10px;
    color: rgba(255,255,255,.7);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .16em;
    text-transform: uppercase;
}

.app-unit-identity h1 {
    margin: 0;
    color: #fff;
    font-size: clamp(34px, 5vw, 54px);
    font-weight: 760;
    letter-spacing: -.035em;
    line-height: 1.06;
}

.app-unit-identity p:last-child {
    max-width: 720px;
    margin: 16px 0 0;
    color: rgba(255,255,255,.78);
    font-size: clamp(15px, 2vw, 18px);
    line-height: 1.55;
}

@media (max-width: 600px) {
    .app-shell-header { --app-shell-height: 48px; }
    .app-nav-cluster { gap: 2px; }
    .app-nav-cluster > .app-nav-back { width: 32px; min-width: 32px; }
    .app-nav-cluster > .app-nav-brand { gap: 5px; padding-right: 5px; font-size: 11px; }
    .app-shell-header .app-nav-brand > span:last-child { display: none; }
    .app-nav-mark { width: 17px; height: 17px; border-radius: 6px; }
    .app-nav-context { margin-left: 7px; padding-left: 11px; }
    .app-nav-context strong { max-width: 118px; font-size: 10px; }
    .app-nav-context small { display: none; }
    .app-account-chip { height: 32px; min-height: 32px; grid-template-columns: 24px; padding: 3px; border-radius: 11px; }
    .app-account-avatar { width: 24px; height: 24px; border-radius: 8px; }
    .app-account-avatar-wrap { width: 24px; height: 24px; }
    .app-account-copy { display: none; }
    .app-account-chip.account-type-vip-student {
        grid-template-columns: 24px minmax(0, auto);
        padding-right: 6px;
    }
    .app-account-chip.account-type-vip-student .app-account-copy { display: block; }
    .app-account-chip.account-type-vip-student .app-account-copy strong { display: none; }
    .app-account-chip.account-type-vip-student .account-role-label {
        gap: 3px;
        margin: 0;
        padding: 2px 4px;
        font-size: 7px;
        line-height: 1;
    }
    .app-shell-header .account-admin-link { min-height: 32px; padding: 0 8px; font-size: 8px; }
    .admin-preview-banner { top: 56px; width: max-content; max-width: calc(100vw - 20px); }
    .physics-language-switch,
    .physics-text-size-trigger { height: 30px; border-radius: 10px; }
    .physics-language-switch button { width: 25px; height: 24px; border-radius: 7px; font-size: 10px; }
    .physics-text-size-trigger { min-width: 67px; gap: 4px; padding: 0 7px; font-size: 10px; }
    .physics-text-size-trigger [data-text-size-prefix] { display: none; }
    .physics-text-size-menu { width: 132px; }
    #topNav .nav-container > .physics-language-switch { margin-right: 4px; }
    #topNav .nav-container > .physics-text-size-switch { margin-right: 7px; }
    .app-unit-identity { padding: 34px 18px 38px; }
}