:root {
    --color-canvas: #f4f7fb;
    --color-surface: #ffffff;
    --color-surface-muted: #eef3f8;
    --color-ink: #102a43;
    --color-ink-muted: #526d82;
    --color-border: #d9e2ec;
    --color-primary: #146c63;
    --color-primary-hover: #0f554e;
    --color-primary-subtle: #dff5ef;
    --color-accent: #e9aa38;
    --color-danger: #b42318;
    --color-danger-subtle: #fef0ee;
    --color-focus: #246bfd;
    --shadow-card: 0 18px 45px rgba(16, 42, 67, 0.12);
    --shadow-subtle: 0 4px 14px rgba(16, 42, 67, 0.08);
    --radius-card: 1.25rem;
    --radius-control: 0.7rem;
    --content-width: 72rem;
    color: var(--color-ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-synthesis: none;
}

* {
    box-sizing: border-box;
}

html {
    background: var(--color-canvas);
}

body {
    min-height: 100vh;
    min-height: 100dvh;
    margin: 0;
    background: var(--color-canvas);
    color: var(--color-ink);
    font-size: 1rem;
    line-height: 1.55;
}

button,
input,
select,
textarea {
    font: inherit;
}

a {
    color: var(--color-primary);
    text-underline-offset: 0.18em;
}

a:hover {
    color: var(--color-primary-hover);
}

:focus-visible {
    outline: 3px solid var(--color-focus);
    outline-offset: 3px;
}

.skip-link {
    position: fixed;
    z-index: 100;
    top: 0.75rem;
    left: 0.75rem;
    transform: translateY(-200%);
    border-radius: var(--radius-control);
    background: var(--color-ink);
    color: #ffffff;
    padding: 0.65rem 0.9rem;
    text-decoration: none;
}

.skip-link:focus {
    transform: translateY(0);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
    color: inherit;
    font-weight: 750;
    letter-spacing: -0.02em;
    text-decoration: none;
}

.brand:hover {
    color: inherit;
}

.brand-mark {
    display: grid;
    width: 2.35rem;
    height: 2.35rem;
    place-items: center;
    border-radius: 0.75rem;
    background: var(--color-primary);
    box-shadow: 0 6px 14px rgba(20, 108, 99, 0.28);
    color: #ffffff;
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.04em;
}

.brand-name {
    font-size: 1.05rem;
}

.eyebrow {
    margin: 0 0 0.7rem;
    color: var(--color-primary);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.09em;
    text-transform: uppercase;
}

.button {
    display: inline-flex;
    min-height: 2.85rem;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
    border-radius: var(--radius-control);
    cursor: pointer;
    font-weight: 750;
    line-height: 1.2;
    text-align: center;
    padding: 0.72rem 1.05rem;
    text-decoration: none;
    transition: background-color 160ms ease, border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.button:hover {
    text-decoration: none;
}

.button:disabled,
select:disabled,
input:disabled,
textarea:disabled {
    cursor: not-allowed;
    opacity: 0.65;
}

.button-danger,
.button-danger:hover {
    background: var(--color-danger);
    color: white;
}

.button-danger-outline {
    border-color: var(--color-danger);
    background: var(--color-surface);
    color: var(--color-danger);
}

.button-danger-outline:hover {
    background: var(--color-danger-subtle);
    color: var(--color-danger);
}

.button-primary {
    background: var(--color-primary);
    box-shadow: 0 7px 15px rgba(20, 108, 99, 0.2);
    color: #ffffff;
}

.button-primary:hover {
    background: var(--color-primary-hover);
    color: #ffffff;
}

.button-secondary {
    border-color: var(--color-border);
    background: var(--color-surface);
    color: var(--color-ink);
}

.button-secondary:hover {
    border-color: #b8c7d5;
    background: var(--color-surface-muted);
    color: var(--color-ink);
}

.app-shell {
    min-height: 100vh;
}

.app-header {
    border-bottom: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
}

.app-header-content {
    display: grid;
    grid-template-columns: auto 1fr auto;
    width: min(100% - 2rem, var(--content-width));
    min-height: 4.5rem;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin: 0 auto;
    padding: 0.75rem 0;
}

.app-nav {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    justify-content: end;
}

.book-switcher {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 0.3rem 0.5rem;
    width: 21rem;
    min-width: 0;
}

.book-switcher label {
    grid-column: 1 / -1;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-ink-muted);
}

.book-switcher select {
    width: 100%;
    min-width: 0;
    min-height: 2.85rem;
    border: 1px solid #8fa6b8;
    border-radius: 0.55rem;
    background: var(--color-surface);
    color: var(--color-ink);
    font: inherit;
    padding: 0.3rem 1.85rem 0.3rem 0.6rem;
}

.book-switcher select:focus {
    border-color: var(--color-focus);
    box-shadow: 0 0 0 3px rgba(36, 107, 253, 0.16);
    outline: none;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    clip-path: inset(50%);
}

.app-nav-link {
    display: inline-flex;
    align-items: center;
    min-height: 2.85rem;
    border-radius: 0.55rem;
    color: var(--color-ink-muted);
    font-size: 0.92rem;
    font-weight: 700;
    padding: 0.45rem 0.65rem;
    text-decoration: none;
}

.app-nav-link:hover {
    background: var(--color-surface-muted);
    color: var(--color-ink);
}

.app-nav-link.active {
    background: var(--color-primary-subtle);
    color: var(--color-primary-hover);
    text-decoration: underline;
    text-decoration-thickness: 2px;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-height: 2.85rem;
    margin-bottom: 1rem;
    font-weight: 650;
    text-decoration: none;
}

.back-link > span:last-child {
    text-decoration: underline;
    text-underline-offset: 0.18em;
}

.app-main {
    width: min(100% - 2rem, var(--content-width));
    margin: 0 auto;
    padding: 1.5rem 0 4.5rem;
}

.page-hero {
    display: grid;
    gap: 1.25rem;
    margin-bottom: 1.75rem;
}

.page-hero h1,
.state-card h1 {
    max-width: 30ch;
    margin: 0;
    color: var(--color-ink);
    font-size: clamp(1.8rem, 4vw, 2.75rem);
    letter-spacing: -0.055em;
    line-height: 1.08;
}

.page-lede {
    max-width: 42rem;
    margin: 0;
    color: var(--color-ink-muted);
    font-size: 1.1rem;
}

.content-card,
.state-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-card);
    background: var(--color-surface);
    box-shadow: var(--shadow-subtle);
}

.content-card {
    padding: clamp(1.4rem, 4vw, 2rem);
}

.content-card.danger-card {
    border-color: var(--color-danger);
}

.danger-card > .section-heading {
    margin-bottom: 0;
}

.content-card.danger-card > .section-heading > .confirm-action {
    min-width: min-content;
}

.danger-card > .section-heading > div > h2 {
    margin: 0;
}

.danger-card > .section-heading > div > p {
    margin: .35rem 0 0;
    color: var(--color-ink-muted);
}

/* Card padding already provides space above a leading heading. */
:is(.content-card, .state-card) > :is(h1, h2, h3):first-child,
:is(.content-card, .state-card) > :is(div, header):first-child > :is(h1, h2, h3):first-child {
    margin-top: 0;
}

.book-create-card,
.settings-card {
    display: grid;
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.book-create-card h2,
.settings-card h2,
.archived-notice h2 {
    margin: 0;
    font-size: 1.3rem;
    letter-spacing: -0.025em;
}

.book-create-card p,
.settings-card p,
.archived-notice p {
    margin: 0.35rem 0 0;
    color: var(--color-ink-muted);
}

.inline-form {
    display: flex;
    flex-wrap: wrap;
    align-items: end;
    gap: 0.85rem;
}

.inline-form .form-field {
    flex: 1 1 14rem;
    min-width: 0;
}

.inline-form .currency-field {
    flex: 0 1 9rem;
}

.form-field-grow {
    min-width: min(100%, 18rem);
}

.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 19rem), 1fr));
    gap: 1rem;
}

.book-card {
    display: grid;
    min-height: 10.5rem;
    align-content: start;
    color: inherit;
    text-decoration: none;
    transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.book-card:hover {
    border-color: #b8c7d5;
    box-shadow: var(--shadow-card);
    color: inherit;
    transform: translateY(-2px);
}

.book-card h2 {
    margin: 1.4rem 0 0;
    font-size: 1.25rem;
    letter-spacing: -0.025em;
}

.book-card p {
    margin: 0.5rem 0 0;
    color: var(--color-ink-muted);
}

.book-card-open {
    display: flex;
    justify-content: space-between;
    margin-top: 1.25rem;
    color: var(--color-primary);
    font-weight: 700;
}

.book-card-header {
    flex-wrap: wrap;
}

.book-card-header,
.danger-zone {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.book-role {
    color: var(--color-ink-muted);
    font-size: 0.84rem;
    font-weight: 700;
}

.status-badge {
    display: inline-flex;
    width: fit-content;
    border-radius: 999px;
    font-size: 0.76rem;
    font-weight: 800;
    padding: 0.22rem 0.55rem;
}

.status-active {
    background: var(--color-primary-subtle);
    color: var(--color-primary-hover);
}

.status-archived {
    background: var(--color-surface-muted);
    color: var(--color-ink-muted);
}

.archived-notice {
    margin-bottom: 1.5rem;
    border-color: #ecd9ad;
    background: #fffaf0;
}

.danger-zone {
    border-top: 1px solid var(--color-border);
    margin-top: 0.25rem;
    padding-top: 1.25rem;
    align-items: start;
    flex-direction: column;
}

.confirm-action { min-width: 0; }
.confirmation-panel {
    margin-top: 0.75rem;
    padding: 1rem;
    border: 1px solid var(--color-danger);
    border-radius: var(--radius-control);
    background: var(--color-danger-subtle);
}
.confirmation-panel p { margin: 0 0 1rem; color: var(--color-ink); }
.confirmation-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.action-status { color: var(--color-primary-hover); font-weight: 650; }
.action-status:empty { margin: 0; }

.danger-zone h3 {
    margin: 0;
    font-size: 1rem;
}

.empty-state {
    display: grid;
    max-width: 44rem;
    gap: 0.65rem;
}

.empty-state h2 {
    margin: 0;
    font-size: 1.2rem;
    letter-spacing: -0.02em;
}

.empty-state p {
    max-width: 38rem;
    margin: 0;
    color: var(--color-ink-muted);
}

.state-page {
    display: grid;
    min-height: calc(100vh - 9rem);
    place-items: center;
}

.state-card {
    width: min(100%, 42rem);
    padding: clamp(1.75rem, 5vw, 3rem);
    text-align: center;
}

.state-icon {
    display: grid;
    width: 3.25rem;
    height: 3.25rem;
    place-items: center;
    margin: 0 auto 1.25rem;
    border-radius: 999px;
    background: var(--color-primary-subtle);
    color: var(--color-primary);
    font-size: 1.35rem;
    font-weight: 800;
}

.state-card h1 {
    max-width: none;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

.state-card p {
    max-width: 35rem;
    margin: 1rem auto 0;
    color: var(--color-ink-muted);
}

.state-actions {
    display: flex;
    justify-content: center;
    margin-top: 1.5rem;
}

.request-id {
    display: inline-block;
    margin-top: 1rem;
    border-radius: 0.4rem;
    background: var(--color-surface-muted);
    color: var(--color-ink-muted);
    font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
    font-size: 0.8rem;
    padding: 0.35rem 0.5rem;
}

.auth-page {
    display: grid;
    min-height: 100vh;
    place-items: center;
    background:
        radial-gradient(circle at 8% 8%, rgba(233, 170, 56, 0.18), transparent 28rem),
        radial-gradient(circle at 94% 92%, rgba(20, 108, 99, 0.18), transparent 32rem),
        var(--color-canvas);
    padding: 1.25rem;
}

.auth-shell {
    display: grid;
    width: min(100%, 64rem);
    grid-template-columns: minmax(0, 1.05fr) minmax(22rem, 0.95fr);
    border: 1px solid rgba(217, 226, 236, 0.95);
    border-radius: 1.5rem;
    background: var(--color-surface);
    box-shadow: var(--shadow-card);
}

.auth-intro {
    display: flex;
    min-height: 35rem;
    flex-direction: column;
    justify-content: flex-start;
    background: linear-gradient(145deg, #102a43 0%, #173d55 54%, #146c63 100%);
    color: #ffffff;
    padding: clamp(2rem, 6vw, 4.25rem);
    border-radius: 1.5rem 0 0 1.5rem;
}

.auth-intro .brand {
    color: #ffffff;
}

.auth-intro .brand-mark {
    background: #ffffff;
    box-shadow: none;
    color: var(--color-primary);
}

.auth-intro-copy {
    max-width: 28rem;
}

.auth-intro .eyebrow {
    color: #bfe9dc;
}

.auth-intro h1 {
    margin: 0;
    color: #ffffff;
    font-size: clamp(2.2rem, 4.5vw, 3.5rem);
    letter-spacing: -0.055em;
    line-height: 1.06;
}

.auth-intro p:not(.eyebrow) {
    margin: 1.1rem 0 0;
    color: #d9e7ef;
    font-size: 1.05rem;
}

.auth-points {
    display: grid;
    gap: 0.6rem;
    margin: 2rem 0 0;
    padding: 0;
    color: #e7f6f2;
    list-style: none;
}

.auth-points li {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.auth-points li::before {
    content: "";
    width: 0.55rem;
    height: 0.55rem;
    flex: 0 0 auto;
    border-radius: 999px;
    background: var(--color-accent);
}

.auth-panel {
    display: grid;
    align-items: center;
    padding: clamp(2rem, 6vw, 4.25rem);
}

.auth-card {
    width: min(100%, 23rem);
    margin: 0 auto;
}

.auth-card h2 {
    margin: 0;
    font-size: 1.7rem;
    letter-spacing: -0.04em;
}

.auth-card-intro {
    margin: 0.55rem 0 1.75rem;
    color: var(--color-ink-muted);
}

.auth-form {
    display: grid;
    gap: 1.15rem;
}

.form-field {
    display: grid;
    gap: 0.45rem;
    min-width: 0;
}

.form-field label {
    color: var(--color-ink);
    font-size: 0.92rem;
    font-weight: 750;
}

.form-field input,
.form-field select,
.form-field textarea {
    width: 100%;
    min-height: 3rem;
    border: 1px solid #8fa6b8;
    border-radius: var(--radius-control);
    background: #ffffff;
    color: var(--color-ink);
    padding: 0.7rem 0.8rem;
    transition: border-color 160ms ease, box-shadow 160ms ease;
}

.settings-link-row,
.invitation-row,
.section-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.settings-link-row {
    border-top: 1px solid var(--color-border);
    margin-top: 1.25rem;
    padding-top: 1.25rem;
}

.settings-link-row h3,
.invitation-row h3,
.section-heading h2 {
    margin: 0;
}

.settings-link-row p,
.invitation-row p {
    margin: 0.35rem 0 0;
    color: var(--color-ink-muted);
}

.invitation-form .role-field {
    flex: 0 1 11rem;
}

.invitation-list {
    display: grid;
    gap: 1.25rem;
}

.invitation-create-card {
    display: grid;
    gap: 1rem;
    margin-bottom: 1.5rem;
}
.invitation-create-card h2 { margin: 0; font-size: 1.3rem; }
.invitation-create-card p { margin: 0.35rem 0 0; color: var(--color-ink-muted); }

.page-hero > *, .content-card, .auth-shell > *, .invitation-row > *, .section-heading > * {
    min-width: 0;
}
h1, h2, h3, p, .book-role, .field-hint, .request-id {
    overflow-wrap: anywhere;
}

.invitation-rows {
    display: grid;
    border-top: 1px solid var(--color-border);
}

.invitation-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(8rem, auto);
    min-height: 5rem;
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 0;
}

.invitation-row-status {
    display: grid;
    justify-items: start;
    gap: 0.35rem;
}

.invitation-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 0.5rem;
    grid-column: 1 / -1;
}

.status-accepted {
    border-color: #9ad7c7;
    background: #e8f7f2;
    color: #0f554e;
}

.status-revoked {
    border-color: #d8b4ad;
    background: #fff3f1;
    color: #8f1d14;
}

.form-field input:hover,
.form-field select:hover,
.form-field textarea:hover {
    border-color: #8fa6b8;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    border-color: var(--color-focus);
    box-shadow: 0 0 0 3px rgba(36, 107, 253, 0.16);
    outline: none;
}

.form-field input.input-validation-error,
.form-field select.input-validation-error,
.form-field textarea.input-validation-error {
    border-color: var(--color-danger);
}

.validation-summary-valid {
    display: none;
}

.form-summary {
    border: 1px solid #f7b8b1;
    border-radius: var(--radius-control);
    background: var(--color-danger-subtle);
    color: #8f1d14;
    font-size: 0.92rem;
    padding: 0.75rem 0.85rem;
}

.form-summary ul {
    margin: 0;
    padding-left: 1.1rem;
}

.field-error {
    color: var(--color-danger);
    font-size: 0.84rem;
    font-weight: 650;
}

.field-hint {
    color: var(--color-ink-muted);
    font-size: 0.84rem;
}

.auth-submit {
    width: 100%;
    margin-top: 0.2rem;
}

.auth-help {
    margin: 1.5rem 0 0;
    color: var(--color-ink-muted);
    font-size: 0.87rem;
    text-align: center;
}

.two-factor-card .form-summary { margin-bottom: 1rem; }
.auth-qr { display: flex; justify-content: center; margin-bottom: 1.25rem; }
.auth-qr img { display: block; max-width: 100%; height: auto; border-radius: var(--radius-control); }
.auth-manual-key { margin-bottom: 1.5rem; padding: 1rem; border: 1px solid var(--color-border); border-radius: var(--radius-control); background: var(--color-canvas); }
.auth-manual-key p { margin: 0 0 .5rem; }
.auth-manual-key code { overflow-wrap: anywhere; font-size: .95rem; }
.auth-recovery-codes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .5rem; padding: 0; list-style: none; }
.auth-recovery-codes li { padding: .6rem; border-radius: var(--radius-control); background: var(--color-canvas); text-align: center; overflow-wrap: anywhere; }
.auth-code-confirmation { display: flex; align-items: flex-start; gap: .6rem; font-size: .9rem; }
.auth-code-confirmation input { flex: 0 0 auto; margin-top: .25rem; }
.auth-recovery-option { margin-top: 1.5rem; color: var(--color-ink-muted); font-size: .9rem; }
.auth-recovery-option summary { cursor: pointer; }
.auth-recovery-option .auth-form { margin-top: 1rem; }
.auth-cancel { margin-top: .75rem; }

.auth-logout-copy {
    margin-bottom: 1.75rem;
}

.auth-logout-copy p {
    color: var(--color-ink-muted);
}

#blazor-error-ui {
    position: fixed;
    z-index: 1000;
    right: 1rem;
    bottom: 1rem;
    left: 1rem;
    display: none;
    max-width: 40rem;
    margin: 0 auto;
    border: 1px solid #f7b8b1;
    border-radius: var(--radius-control);
    background: var(--color-danger-subtle);
    box-shadow: var(--shadow-subtle);
    color: #8f1d14;
    padding: 0.85rem 3rem 0.85rem 1rem;
}

#blazor-error-ui .reload {
    color: inherit;
    font-weight: 750;
}

#blazor-error-ui .dismiss {
    position: absolute;
    top: 0.2rem;
    right: 0.2rem;
    min-width: 2.85rem;
    min-height: 2.85rem;
    border: 0;
    background: transparent;
    color: inherit;
    font-size: 1.5rem;
    cursor: pointer;
}

@media (max-width: 64rem) {
    .app-header-content { grid-template-columns: 1fr auto; }
    .book-switcher { grid-column: 1 / -1; width: 100%; }
}

@media (max-width: 48rem) {
    .auth-page {
        display: block;
        padding: 0;
    }

    .auth-shell {
        min-height: 100vh;
        grid-template-columns: 1fr;
        border: 0;
        border-radius: 0;
        align-content: start;
    }

    .auth-intro {
        min-height: auto;
        gap: 1rem;
        padding: 1.25rem 1.5rem;
        border-radius: 0;
    }

    .auth-intro h1 { font-size: 1.65rem; line-height: 1.2; }
    .auth-intro p:not(.eyebrow) { font-size: 0.95rem; margin-top: 0.65rem; }
    .auth-intro .eyebrow { display: none; }

    .auth-points {
        display: none;
    }

    .auth-panel {
        padding: 1.5rem 1.5rem 2rem;
    }

    .app-main {
        padding-top: 1rem;
    }

    .inline-form,
    .danger-zone,
    .settings-link-row,
    .invitation-row,
    .section-heading {
        align-items: stretch;
        flex-direction: column;
    }

    .inline-form .currency-field {
        max-width: none;
    }

    /* Flex bases become heights in a column: reset every field, including roles. */
    .inline-form .form-field,
    .invitation-form .role-field { flex: 0 1 auto; }
    .invitation-row { display: flex; }
    .confirm-action { width: 100%; }
    .confirmation-actions .button { flex: 1 1 12rem; }

    .inline-form .button,
    .danger-zone .button,
    .settings-link-row .button,
    .section-heading .button {
        width: 100%;
    }

    .invitation-actions {
        justify-content: stretch;
    }

    .invitation-actions .button {
        flex: 1 1 10rem;
    }
}

@media (max-width: 30rem) {
    .app-header-content,
    .app-main {
        width: min(100% - 1.25rem, var(--content-width));
    }

    .brand-name {
        font-size: 0.96rem;
    }

    .app-header-content { gap: 0.5rem; }
    .app-nav { gap: 0.15rem; }
    .brand { gap: 0.4rem; }
    .brand-mark { width: 2rem; height: 2rem; }
    .app-header .brand-name { display: none; }

    .app-nav-link {
        padding-right: 0.4rem;
        padding-left: 0.4rem;
    }

    .content-card { padding: 1.1rem; }
    .auth-panel, .auth-intro { padding-inline: 1.25rem; }
}

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

.book-navigation {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    padding: 1rem;
}
.book-navigation a {
    display: inline-flex;
    align-items: center;
    min-height: 2.85rem;
    padding: .5rem .75rem;
    border-radius: .5rem;
    text-decoration: none;
}
.book-navigation a.active {
    background: var(--color-primary);
    color: white;
}

/* A single gap governs cards and grids across feature pages. */
.app-main {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}
.app-main > * {
    margin-top: 0;
    margin-bottom: 0;
}
.app-main > .action-status:empty {
    display: none;
}
.book-grid {
    gap: 1.25rem;
}
.collapsible-card > summary {
    cursor: pointer;
    font-size: 1.3rem;
    font-weight: 650;
    min-height: 2.85rem;
    align-content: center;
}
.collapsible-card > summary:focus-visible {
    outline: 3px solid var(--color-focus);
    outline-offset: 4px;
    border-radius: .25rem;
}
.collapsible-content {
    padding-top: 1.25rem;
}
.collapsible-content > :first-child {
    margin-top: 0;
}

.monthly-book {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    min-width: 0;
}
.monthly-book h2 { margin: .35rem 0 0; }
.monthly-book p { margin: 0; }
.monthly-book > .button { margin-top: auto; }
.monthly-result {
    display: grid;
    gap: .4rem;
    padding: 1rem;
    border-radius: var(--radius-control);
    background: #e8f7f2;
}
.monthly-result strong {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-variant-numeric: tabular-nums;
    overflow-wrap: anywhere;
}
.monthly-positive { color: var(--color-primary); }
.monthly-negative { color: var(--color-danger); background: #fff3f1; }
.monthly-metrics { margin: 0; display: grid; gap: .85rem; }
.monthly-metrics > div { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .25rem 1rem; }
.monthly-metrics dd { margin: 0; font-weight: 650; font-variant-numeric: tabular-nums; }
.monthly-balance { padding-top: .85rem; border-top: 1px solid var(--color-border); }

select:not([multiple]) {
    appearance: none;
    padding-right: 2.75rem;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='m4 6 4 4 4-4' fill='none' stroke='%23526d82' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1rem;
}
.header-account { display: flex; align-items: center; gap: 1rem; margin-left: auto; min-width: 0; }
.header-account span { overflow-wrap: anywhere; }
.header-account .button { flex-shrink: 0; }
.money-positive { color: #146c3a; }
.money-negative { color: var(--color-danger); }
.money-neutral { color: var(--color-ink); }
.app-main h1[tabindex="-1"]:focus { outline: none; }
.password-control { position: relative; }
.form-field .password-control input { width: 100%; padding-right: 3.25rem; }
.password-toggle {
    position: absolute; right: .25rem; top: 50%; transform: translateY(-50%);
    display: grid; place-items: center; width: 2.85rem; height: 2.85rem;
    border: 0; background: transparent; color: var(--color-ink-muted); cursor: pointer;
    border-radius: var(--radius-control);
}
.password-toggle .eye-slash { display: none; }
.password-toggle[aria-pressed="true"] .eye-slash { display: block; }
.remember-me { display: flex; align-items: center; gap: .65rem; cursor: pointer; min-height: 2.85rem; }
.remember-me input { width: 1.2rem; height: 1.2rem; accent-color: var(--color-primary); }
@media (forced-colors: active) {
    select:not([multiple]) { appearance: auto; background-image: none; }
}

.app-header-content { grid-template-columns: auto minmax(0, 1fr); }
.header-account { flex-wrap: wrap; justify-content: flex-end; }
.header-account .book-switcher {
    display: block;
    grid-column: auto;
    width: clamp(9rem, 17vw, 15rem);
    min-width: 0;
    max-width: 100%;
    margin: 0;
}
.header-account .book-switcher select { padding-right: 2.75rem; }
@media (max-width: 36rem) {
    .header-account { gap: .5rem; }
    .header-account > span { flex-basis: 100%; text-align: right; }
    .header-account .book-switcher { width: 10rem; flex: 1 1 8rem; }
}
/* Applied filters stay visible when the filter form is collapsed. */
.filter-description {
    display: block;
    margin-top: .35rem;
    font-size: .9rem;
    font-weight: 400;
    overflow-wrap: anywhere;
}

/* Compact authentication and resilient header sizing. */
.auth-intro { min-height: 24rem; padding: 2rem; gap: 2rem; }
.auth-intro h1 { font-size: clamp(1.7rem, 3vw, 2.4rem); line-height: 1.15; }
.auth-shell-compact { grid-template-columns: minmax(0, 1fr); max-width: 32rem; }
.auth-shell-compact .auth-panel { border-radius: 1.5rem; }
.auth-shell-compact h1 { font-size: 1.65rem; margin-top: 0; }
.header-account > span { max-width: 16rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
@media (max-width: 48rem) {
    .auth-intro { min-height: 0; padding: 1.25rem; gap: 1rem; }
    .auth-intro-copy { display: none; }
    .auth-panel { padding-block: 1.5rem; }
    .header-account { max-width: 100%; }
    .header-account > span { max-width: 100%; }
}

/* Field spacing comes from the grid gap, including hints and validation. */
.form-field > .field-hint,
.form-field > .form-summary { margin: 0; }
.field-error:empty { display: none; }
.form-field textarea { min-height: 6rem; resize: vertical; }
.auth-form > .remember-me { margin-top: -.5rem; }
.transaction-pagination {
    margin-top: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--color-border);
}
.app-main > .empty-state { max-width: none; }

/* Account security shares the application shell and feature card styles. */
.security-grid { display: grid; grid-template-columns: minmax(0, 2fr) minmax(16rem, 1fr); gap: var(--section-gap, 1.5rem); align-items: start; }
.security-sidebar { display: grid; gap: 1.5rem; min-width: 0; }
.security-grid .settings-card { margin: 0; min-width: 0; }
.security-form { display: grid; gap: .75rem; }
.security-form > label { font-weight: 650; }
.security-form > input, .security-form > select { width: 100%; min-width: 0; min-height: 3rem; padding: .7rem .8rem; border: 1px solid #8fa6b8; border-radius: var(--radius-control); background: var(--color-surface); color: var(--color-ink); }
.security-settings .button { white-space: normal; }
.security-settings img { max-width: 100%; height: auto; }
.security-settings code { overflow-wrap: anywhere; }
.security-settings #recovery-codes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .75rem; padding-left: 1.25rem; }
.header-account a[aria-current="page"] { background: var(--color-surface-muted); border-color: var(--color-ink-muted); }
@media (max-width: 760px) {
    .security-grid { grid-template-columns: minmax(0, 1fr); }
}

/* Version 3 readouts and rule forms reuse the shared surface and focus tokens. */
.outlook-values dt { font-weight: 600; margin-top: .8rem; }
.outlook-values dd { margin: .25rem 0 0; overflow-wrap: anywhere; }
.recurring-rule-form fieldset { border: 0; padding: 0; margin: 0; min-width: 0; display: grid; gap: 1rem; }
.recurring-rule-form legend { font-weight: 600; padding: 0 0 1rem; }
.settings-link-row > div { min-width: 0; overflow-wrap: anywhere; }
.content-card details summary { cursor: pointer; padding: .8rem 0; }