:root {
    color-scheme: light;

    --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

    --color-ink: #18231f;
    --color-muted: #66736e;
    --color-paper: #fbfaf7;
    --color-card: #ffffff;
    --color-soft: #eef3ef;
    --color-line: #dce5df;
    --color-brand: #1d4236;
    --color-brand-strong: #123026;
    --color-accent: #b96d38;
    --color-danger: #a33a2b;
    --color-on-brand: #fbfaf7;

    --space-1: 8px;
    --space-2: 10px;
    --space-3: 14px;
    --space-4: 18px;
    --space-5: 22px;
    --space-6: 28px;
    --space-7: 40px;
    --space-8: 56px;

    --radius-sm: 8px;
    --radius-lg: 24px;
    --shadow-soft: 0 24px 70px rgba(29, 66, 54, 0.12);
    --shadow-button: 0 12px 28px rgba(29, 66, 54, 0.18);

    --content-max: 1180px;
}

body {
    min-width: 320px;
    background:
        linear-gradient(135deg, rgba(238, 243, 239, 0.92), rgba(251, 250, 247, 0.86)),
        var(--color-paper);
    color: var(--color-ink);
    font-family: var(--font-sans);
}

html {
    scrollbar-gutter: stable;
}

a {
    color: inherit;
}

button {
    cursor: pointer;
}

:focus-visible {
    outline: 3px solid rgba(185, 109, 56, 0.45);
    outline-offset: 3px;
}

.home-shell,
.auth-shell {
    min-height: 100vh;
}

.home-shell {
    width: min(var(--content-max), calc(100% - 40px));
    margin: 0 auto;
    padding: var(--space-6) 0 var(--space-8);
}

.site-header,
.site-nav,
.brand,
.hero-actions {
    display: flex;
    align-items: center;
}

.site-header {
    justify-content: space-between;
    gap: var(--space-5);
    min-height: 44px;
}

.site-nav {
    gap: var(--space-3);
}

.logout-form {
    display: inline-flex;
    margin: 0;
}

.brand {
    text-decoration: none;
}

.brand-lockup {
    display: block;
    width: 168px;
    height: auto;
}

.nav-link,
.auth-switch a {
    color: var(--color-brand);
    font-weight: 700;
    text-decoration: none;
}

.nav-link:hover,
.auth-switch a:hover {
    text-decoration: underline;
}

.nav-user {
    max-width: 260px;
    overflow: hidden;
    color: var(--color-muted);
    font-size: 0.92rem;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.button {
    display: inline-flex;
    min-height: 42px;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    padding: 0 var(--space-4);
    font-weight: 800;
    text-decoration: none;
    transition: transform 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

.button:hover {
    transform: translateY(-1px);
}

.button-primary {
    background: var(--color-brand);
    color: #ffffff;
    box-shadow: var(--shadow-button);
}

.button-primary:hover {
    background: var(--color-brand-strong);
}

.button-secondary,
.button-ghost {
    border-color: var(--color-line);
    background: rgba(255, 255, 255, 0.76);
    color: var(--color-brand);
}

.button-wide {
    width: 100%;
}

.eyebrow {
    margin-bottom: var(--space-4);
    color: var(--color-accent);
    font-size: 0.78rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero-copy h1,
.auth-brand h1 {
    max-width: 760px;
    font-size: clamp(2.25rem, 7vw, 5rem);
    line-height: 0.98;
    letter-spacing: 0;
}

.hero-text,
.auth-brand p,
.auth-note,
.app-tile p,
.auth-switch {
    color: var(--color-muted);
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(360px, 0.86fr);
    gap: 42px;
    align-items: center;
    padding: 0 0 24px;
}

.hero-text {
    max-width: 620px;
    margin: 24px 0 0;
    font-size: 1.12rem;
    line-height: 1.7;
}

.hero-actions {
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 30px;
}

.suite-panel {
    border: 1px solid var(--color-line);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    background: rgba(255, 255, 255, 0.78);
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(18px);
}

.panel-topline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-1) var(--space-1) var(--space-4);
    color: var(--color-muted);
    font-size: 0.82rem;
    font-weight: 800;
}

.panel-dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: var(--color-accent);
}

.app-grid {
    display: grid;
    gap: var(--space-2);
}

.app-tile {
    display: flex;
    min-height: 104px;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-sm);
    padding: var(--space-4);
    background: var(--color-card);
}

.app-tile h2 {
    margin-bottom: var(--space-1);
    font-size: 1rem;
}

.app-tile h2 a {
    color: inherit;
    text-decoration: none;
}

.app-tile h2 a:hover {
    text-decoration: underline;
}

.app-tile p {
    line-height: 1.5;
}

.app-tile span {
    flex: 0 0 auto;
    border-radius: 999px;
    padding: 5px 9px;
    background: var(--color-soft);
    color: var(--color-brand);
    font-size: 0.72rem;
    font-weight: 900;
}

.auth-shell {
    display: grid;
    grid-template-columns: minmax(0, 0.95fr) minmax(380px, 0.7fr);
}

.auth-brand {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 64px;
    padding: 44px clamp(28px, 6vw, 78px);
    background: var(--color-brand);
    color: var(--color-on-brand);
}

.auth-brand .brand-lockup {
    width: 178px;
}

.auth-brand .eyebrow,
.auth-brand p {
    color: #d8e3dc;
}

.auth-brand h1 {
    max-width: 650px;
    font-size: clamp(2.1rem, 6vw, 4.6rem);
}

.auth-brand p:not(.eyebrow) {
    max-width: 560px;
    margin: var(--space-5) 0 0;
    font-size: 1.05rem;
    line-height: 1.7;
}

.auth-panel {
    display: grid;
    align-items: center;
    padding: var(--space-7) clamp(22px, 5vw, 64px);
}

.auth-card {
    width: min(100%, 440px);
    margin: 0 auto;
}

.auth-card h2 {
    margin-bottom: var(--space-2);
    font-size: 2rem;
    letter-spacing: 0;
}

.auth-note {
    margin-bottom: var(--space-6);
    line-height: 1.6;
}

.form-stack,
.form-stack div {
    display: grid;
    gap: var(--space-2);
}

.form-stack {
    gap: var(--space-3);
}

.form-stack label {
    color: var(--color-ink);
    font-size: 0.92rem;
    font-weight: 800;
}

.form-stack input,
.form-stack select {
    width: 100%;
    min-height: 46px;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-sm);
    padding: 0 13px;
    background: #ffffff;
    color: var(--color-ink);
}

.form-stack input:focus,
.form-stack select:focus {
    border-color: var(--color-brand);
    box-shadow: 0 0 0 4px rgba(29, 66, 54, 0.12);
}

.form-stack .form-checkbox {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.form-stack .form-checkbox label {
    font-weight: 700;
}

.form-stack .form-checkbox input {
    order: -1;
    width: 1.125rem;
    min-height: 1.125rem;
    height: 1.125rem;
    margin: 0;
    border-radius: 4px;
    padding: 0;
    accent-color: var(--color-brand);
}

.form-stack ul {
    padding-left: var(--space-4);
    color: var(--color-danger);
    font-size: 0.9rem;
}

.form-alert {
    margin-bottom: 16px;
    border: 1px solid rgba(163, 58, 43, 0.22);
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    background: rgba(163, 58, 43, 0.08);
    color: #7f281e;
    font-weight: 700;
}

.auth-switch {
    margin: var(--space-5) 0 0;
}

.app-shell {
    display: grid;
    gap: var(--space-6);
    align-content: start;
}

.app-page-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: var(--space-5);
}

.app-page-heading h1 {
    font-size: clamp(2rem, 5vw, 3.6rem);
    line-height: 1;
    letter-spacing: 0;
}

.narrow-panel {
    width: min(100%, 620px);
}

.expense-summary-grid,
.expense-form-grid,
.expense-posting-grid,
.expense-split-row {
    display: grid;
    gap: var(--space-3);
}

.expense-summary-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.expense-total {
    border-radius: var(--radius-sm);
    box-shadow: none;
}

.expense-total span,
.expense-table td span,
.expense-table td small {
    color: var(--color-muted);
}

.expense-total strong {
    display: block;
    margin-top: var(--space-1);
    font-size: 1.5rem;
}

.expense-list-panel,
.expense-form-panel,
.expense-ledgers-panel {
    overflow: hidden;
}

.expense-table-wrap {
    overflow-x: auto;
}

.expense-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 720px;
}

.expense-table th,
.expense-table td {
    border-top: 1px solid var(--color-line);
    padding: var(--space-3);
    text-align: left;
    vertical-align: top;
}

.expense-table th {
    color: var(--color-muted);
    font-size: 0.78rem;
    font-weight: 900;
    text-transform: uppercase;
}

.expense-table td strong,
.expense-table td span,
.expense-table td small {
    display: block;
}

.expense-child-row td:first-child,
.expense-child-row td:nth-child(2) {
    padding-left: var(--space-6);
}

.expense-money {
    font-weight: 900;
    white-space: nowrap;
}

.expense-badges {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
}

.expense-badges span {
    border-radius: 999px;
    padding: 5px 9px;
    background: var(--color-soft);
    color: var(--color-brand);
    font-size: 0.78rem;
    font-weight: 900;
}

.expense-form-grid {
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.expense-posting-grid,
.expense-split-row {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    align-items: end;
}

.expense-split-list {
    display: grid;
    gap: var(--space-2);
}

.expense-split-list h2 {
    font-size: 1rem;
    letter-spacing: 0;
}

.expense-split-row {
    border: 1px solid var(--color-line);
    border-radius: var(--radius-sm);
    padding: var(--space-3);
}

.expense-split-row legend {
    padding: 0 var(--space-1);
    color: var(--color-muted);
    font-size: 0.78rem;
    font-weight: 900;
}

.expense-ledger-list {
    display: grid;
    gap: 0;
    margin-top: var(--space-3);
}

.expense-ledger-row {
    border-top: 1px solid var(--color-line);
    padding: var(--space-4) 0;
}

.expense-ledger-row:first-child {
    border-top: 0;
    padding-top: 0;
}

.expense-ledger-row:last-child {
    padding-bottom: 0;
}

.expense-ledger-summary {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: var(--space-3) var(--space-4);
    align-items: center;
    cursor: pointer;
    list-style: none;
}

.expense-ledger-summary::-webkit-details-marker {
    display: none;
}

.expense-ledger-title {
    min-width: 0;
}

.expense-ledger-title h2,
.expense-editor-section h3 {
    font-size: 1rem;
    letter-spacing: 0;
}

.expense-ledger-title h2 {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.expense-ledger-meta {
    display: grid;
    grid-template-columns: minmax(180px, 0.85fr) minmax(220px, 1fr);
    grid-column: 1 / -1;
    gap: var(--space-3) var(--space-4);
    align-items: start;
}

.expense-ledger-users,
.expense-ledger-categories {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
}

.expense-ledger-users span,
.expense-ledger-categories span,
.expense-role-badge {
    border-radius: 999px;
    padding: 5px 9px;
    background: var(--color-soft);
    color: var(--color-brand);
    font-size: 0.78rem;
    font-weight: 900;
}

.expense-ledger-categories {
    min-width: 0;
}

.expense-ledger-categories span {
    background: rgba(185, 109, 56, 0.12);
    color: #7a4524;
}

.expense-ledger-edit[open] .expense-ledger-meta {
    display: none;
}

.expense-edit-button {
    display: inline-flex;
    width: 72px;
    min-height: 42px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-sm);
    padding: 0 var(--space-4);
    background: rgba(255, 255, 255, 0.76);
    color: var(--color-brand);
    font-weight: 800;
    transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

.expense-ledger-edit[open] .expense-edit-button {
    border-color: var(--color-brand);
    background: var(--color-brand);
    color: var(--color-on-brand);
}

.expense-ledger-editor {
    display: grid;
    gap: var(--space-4);
    width: 100%;
    margin-top: var(--space-3);
    border: 1px solid var(--color-line);
    border-radius: var(--radius-sm);
    padding: var(--space-4);
    background: var(--color-card);
    box-shadow: 0 18px 45px rgba(29, 66, 54, 0.1);
}

.expense-editor-section,
.expense-category-fieldset,
.expense-category-input-list,
.expense-member-list {
    display: grid;
    gap: var(--space-3);
}

.expense-category-input-list {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.expense-category-item {
    display: grid;
    gap: var(--space-1);
}

.expense-form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    justify-content: flex-end;
}

.expense-editor-section {
    border-top: 1px solid var(--color-line);
    padding-top: var(--space-3);
}

.expense-editor-section:first-child {
    border-top: 0;
    padding-top: 0;
}

.expense-member-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: var(--space-3);
    align-items: center;
    border: 1px solid var(--color-line);
    border-radius: var(--radius-sm);
    padding: var(--space-3);
}

.expense-member-row strong,
.expense-member-row span {
    display: block;
}

.expense-member-row > div span {
    margin-top: 3px;
    color: var(--color-muted);
    font-size: 0.86rem;
}

.expense-role-badge {
    background: rgba(29, 66, 54, 0.1);
}

.expense-remove-form {
    margin: 0;
}

.expense-add-form {
    border-top: 1px dashed var(--color-line);
    padding-top: var(--space-3);
}

.expense-inline-form {
    grid-template-columns: minmax(160px, 1fr) auto;
    align-items: end;
}

.form-alert ul {
    margin: 0;
    padding-left: var(--space-4);
}

@media (max-width: 860px) {
    .hero,
    .auth-shell {
        grid-template-columns: 1fr;
    }

    .hero {
        padding-top: 0;
    }

    .auth-brand {
        min-height: 42vh;
    }
}

@media (max-width: 620px) {
    .home-shell {
        width: min(100% - 24px, var(--content-max));
        padding-top: var(--space-4);
    }

    .site-header,
    .site-nav,
    .app-tile,
    .app-page-heading {
        align-items: stretch;
    }

    .site-header,
    .app-page-heading {
        flex-direction: column;
    }

    .site-nav {
        width: 100%;
        flex-wrap: wrap;
        justify-content: space-between;
    }

    .nav-user {
        max-width: 160px;
    }

    .app-tile {
        flex-direction: column;
    }

    .expense-member-row,
    .expense-inline-form {
        grid-template-columns: 1fr;
    }

    .expense-ledger-summary {
        gap: var(--space-3);
    }

    .expense-ledger-meta {
        grid-template-columns: 1fr;
    }

    .expense-edit-button {
        width: 100%;
    }

    .expense-ledger-editor {
        width: 100%;
    }

    .auth-panel {
        padding-top: 34px;
    }
}