.account-page-shell {
    margin: 0 auto;
    max-width: 1380px;
    min-height: 100vh;
    padding: clamp(5.5rem, 9vw, 8rem) clamp(1rem, 6vw, 5rem);
    width: 100%;
}

.account-page-header {
    align-items: end;
    display: flex;
    gap: 2rem;
    justify-content: space-between;
}

.account-page-header h1 {
    font-size: clamp(2.7rem, 6vw, 5rem);
    margin: 0.9rem 0 1.2rem;
    max-width: 900px;
}

.account-page-header p {
    max-width: 760px;
}

.account-page-shell .button.subtle {
    background: color-mix(in srgb, var(--surface-raised) 76%, transparent);
    border-color: var(--line);
    color: var(--text);
}

.account-nav {
    border-bottom: 1px solid var(--line);
    display: flex;
    gap: 0.4rem;
    margin: 3rem 0 2rem;
    overflow-x: auto;
}

.account-nav a {
    border-bottom: 2px solid transparent;
    color: var(--muted);
    font-size: 0.82rem;
    font-weight: 750;
    padding: 0.8rem 1rem;
    text-decoration: none;
    white-space: nowrap;
}

.account-nav a.active,
.account-nav a:hover {
    border-color: var(--cyan);
    color: var(--text);
}

.account-panel-grid,
.security-panel-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.account-panel-grid .account-panel:last-child {
    grid-column: 1 / -1;
}

.account-panel {
    background: linear-gradient(145deg, color-mix(in srgb, var(--surface) 96%, transparent), color-mix(in srgb, var(--primary) 4%, var(--surface)));
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    padding: clamp(1.3rem, 3vw, 2rem);
}

.account-panel h2 {
    font-size: clamp(1.45rem, 3vw, 2rem);
    margin: 0.75rem 0 0.8rem;
}

.account-details {
    display: grid;
    gap: 0;
    margin: 1.5rem 0 0;
}

.account-details div {
    border-top: 1px solid var(--line);
    display: grid;
    gap: 0.35rem;
    padding: 1rem 0;
}

.account-details dt,
.account-details dd {
    margin: 0;
}

.account-details dt {
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.account-details dd {
    overflow-wrap: anywhere;
}

.account-page-shell .form-stack input,
.account-page-shell .form-stack select {
    background: color-mix(in srgb, var(--page) 72%, transparent);
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    color: var(--text);
    min-height: 50px;
    padding: 0.78rem 0.95rem;
    width: 100%;
}

:root[data-theme="light"] .account-page-shell .form-stack input,
:root[data-theme="light"] .account-page-shell .form-stack select {
    background: rgba(255, 255, 255, 0.9);
}

.account-preference-actions {
    align-items: center;
    border-top: 1px solid var(--line);
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
    padding-top: 1.2rem;
}

.account-preference-actions > span {
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 700;
    margin-right: auto;
    text-transform: uppercase;
}

@media (max-width: 850px) {
    .account-page-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .account-panel-grid,
    .security-panel-grid {
        grid-template-columns: 1fr;
    }

    .account-panel-grid .account-panel:last-child {
        grid-column: auto;
    }
}

@media (max-width: 620px) {
    .account-page-shell {
        padding-top: 6.5rem;
    }

    .account-nav a {
        padding-inline: 0.7rem;
    }

    .account-preference-actions {
        align-items: stretch;
        flex-direction: column;
    }
}