.account-security { box-sizing: border-box; width: min(580px, calc(100vw - 24px)); max-height: calc(100dvh - 24px); margin: auto; padding: clamp(24px, 5vw, 40px); overflow-y: auto; overscroll-behavior: contain; border: 1px solid var(--color-border); border-radius: 24px; background: var(--color-surface); color: var(--color-text); box-shadow: 0 28px 80px rgba(10, 32, 33, .3); z-index: 12000; }
.account-security::backdrop { background: color-mix(in srgb, var(--color-bg) 85%, #102b2c 15%); }
.account-security__mark { color: var(--color-accent); font-size: 2rem; }
.account-security h1 { font-size: clamp(1.5rem, 5vw, 2rem); line-height: 1.2; margin: 12px 0 16px; }
.account-security p { line-height: 1.55; color: var(--text-secondary); }
.account-security .student-auth-form { margin: 20px 0; gap: 14px; }
.account-security .student-auth-form input { box-sizing: border-box; font-size: 16px; }
.account-security .btn { min-height: 44px; white-space: normal; }
.account-security__key { margin: 24px 0; padding: 24px 12px; text-align: center; border-radius: 16px; background: var(--color-surface-2); color: var(--color-accent); font: 800 clamp(2.6rem, 11vw, 4.5rem)/1.2 ui-monospace, monospace; letter-spacing: .12em; user-select: all; }
.account-security__checkbox { display: flex; gap: 12px; align-items: center; margin: 22px 0; cursor: pointer; }
.account-security__checkbox input { width: 22px; height: 22px; accent-color: var(--color-accent); }
.account-security__actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0; }
.account-security__footer { margin-top: 20px; }
.account-security__hint { font-size: .85rem; margin: 0; }
.account-security [hidden], .account-recovery[hidden] { display: none !important; }
.account-recovery { padding: 14px; margin-top: 14px; border: 1px solid var(--color-border); border-radius: 12px; transition: background .4s, box-shadow .4s; }
.account-recovery__row { display: flex; align-items: center; justify-content: space-between; gap: 8px; flex-wrap: wrap; }
.account-recovery__key { font: 800 1.3rem ui-monospace, monospace; letter-spacing: .12em; user-select: all; }
.account-recovery__label { display: block; font-weight: 700; margin-bottom: 8px; }
.account-recovery p { margin: 12px 0 0; font-size: .85rem; line-height: 1.5; }
.account-recovery.is-highlighted { background: var(--color-surface-2); box-shadow: 0 0 0 3px var(--color-accent); }
@media (prefers-reduced-motion: reduce) { .account-recovery { transition: none; } }