:root {
    --color-bg: #f7f7f8;
    --color-surface: #ffffff;
    --color-text: #1b1b1f;
    --color-muted: #6b6b70;
    --color-border: #e2e2e6;
    --color-accent: #2f6f4f;
    --color-danger: #b3261e;
    --radius: 10px;
    --space: 1.15rem;
    color-scheme: light;
}

* {
    box-sizing: border-box;
}

/* `.btn` (and similar) set `display` directly, which — per normal CSS cascade
   rules — overrides the browser's built-in `[hidden] { display: none }` rule
   even though that's a more "special" attribute, since author styles always
   win over user-agent styles at equal importance. Without this, `hidden` on
   any element carrying a class that sets `display` (e.g. #install-btn) has no
   effect and the element stays visible regardless of the attribute. */
[hidden] {
    display: none !important;
}

html {
    font-size: 106.25%;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.4;
    min-height: 100vh;
    padding-bottom: env(safe-area-inset-bottom);
}

.app-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem var(--space);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
}

.app-header__brand {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-text);
    text-decoration: none;
    margin-right: auto;
}

.hamburger-btn {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 0;
    background: none;
    border: none;
    cursor: pointer;
    flex-shrink: 0;
}

.hamburger-btn span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
}

.app-header__right {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.6rem;
    flex-shrink: 0;
}

.app-header__user {
    font-size: 0.85rem;
    color: var(--color-muted);
}

.btn--sm {
    padding: 0.5rem 0.9rem;
    font-size: 0.9rem;
    min-height: 40px;
}

.app-menu {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    width: 80vw;
    max-width: 340px;
    display: flex;
    flex-direction: column;
    background: var(--color-surface);
    border-right: 1px solid var(--color-border);
    padding: 1rem var(--space);
    padding-top: calc(1rem + env(safe-area-inset-top));
    transform: translateX(-100%);
    visibility: hidden;
    transition: transform 0.25s ease, visibility 0.25s;
    box-shadow: 2px 0 12px rgba(0, 0, 0, 0.15);
}

.app-menu.app-menu--open {
    transform: translateX(0);
    visibility: visible;
}

.app-menu a {
    padding: 0.9rem 0;
    color: var(--color-text);
    text-decoration: none;
    border-bottom: 1px solid var(--color-border);
}

.app-menu a:last-child {
    border-bottom: none;
}

.app-menu__lang {
    display: flex;
    gap: 1rem;
    margin-top: auto;
    padding-top: 1rem;
}

.app-backdrop {
    position: fixed;
    inset: 0;
    z-index: 99;
    background: rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s;
}

.app-backdrop.app-backdrop--visible {
    opacity: 1;
    visibility: visible;
}

.app-main {
    max-width: 480px;
    margin: 0 auto;
    padding: var(--space);
}

a {
    color: var(--color-accent);
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.25rem;
    min-height: 44px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    text-decoration: none;
    cursor: pointer;
}

.btn--primary {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

.btn--danger {
    background: var(--color-danger);
    border-color: var(--color-danger);
    color: #fff;
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: var(--space);
    margin-bottom: var(--space);
}

.field {
    margin-bottom: var(--space);
}

.field label {
    display: block;
    margin-bottom: 0.35rem;
    font-size: 0.95rem;
    color: var(--color-muted);
}

.field input,
.field select {
    width: 100%;
    padding: 0.75rem;
    min-height: 44px;
    font-size: 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
}

.list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space);
    margin-bottom: var(--space);
    flex-wrap: wrap;
}

.list-header__actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.empty-state {
    color: var(--color-muted);
    text-align: center;
    padding: 2rem 0;
}

.expense-card__main {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 0.5rem;
}

.expense-card__title {
    font-weight: 600;
}

.expense-card__amount {
    font-weight: 700;
    white-space: nowrap;
}

.expense-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-items: center;
    margin-top: 0.4rem;
    color: var(--color-muted);
    font-size: 0.9rem;
}

.expense-card__actions {
    display: flex;
    gap: 1.25rem;
    margin-top: 0.6rem;
}

.badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    background: #e6f0ea;
    color: var(--color-accent);
    font-size: 0.8rem;
}

.badge--muted {
    background: #eee;
    color: var(--color-muted);
}

.badge--danger {
    background: #fbe9e7;
    color: var(--color-danger);
}

.link-btn {
    background: none;
    border: none;
    padding: 0.5rem 0;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    color: var(--color-accent);
    text-decoration: underline;
    cursor: pointer;
    font-size: 1rem;
}

.link-btn--danger {
    color: var(--color-danger);
}

.banner {
    font-size: 0.95rem;
}

.banner--info {
    background: #eaf2ee;
    border-color: #cfe3d8;
    color: var(--color-accent);
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.spinner {
    display: inline-block;
    width: 1em;
    height: 1em;
    flex-shrink: 0;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

fieldset {
    border: none;
    padding: 0;
    margin: 0;
    min-width: 0;
}

.banner--warning {
    background: #fbe9e7;
    border-color: #f3c9c4;
    color: var(--color-danger);
}

.receipt-preview {
    display: block;
    width: 100%;
    border-radius: var(--radius);
}

.receipt-status {
    color: var(--color-muted);
    font-size: 0.9rem;
    min-height: 1.2em;
}

.upload-actions {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-bottom: 0.6rem;
}

.upload-input--enhanced {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.ocr-text {
    white-space: pre-wrap;
    word-break: break-word;
    font-size: 0.85rem;
    color: var(--color-muted);
    margin: 0.5rem 0 0;
}

.home-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 2rem;
}

.btn--big {
    text-align: center;
    padding: 1.1rem;
    font-size: 1.05rem;
    font-weight: 600;
}

.filter-form {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: var(--space);
}

.filter-form select,
.filter-form input {
    padding: 0.75rem;
    min-height: 44px;
    font-size: 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    flex: 1 1 auto;
    min-width: 0;
}

.total-card {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-weight: 600;
}

.total-card__amount {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-accent);
}

.badge--warning {
    background: #fff3cd;
    color: #8a6d1a;
}

.category-card {
    display: flex;
    justify-content: space-between;
    align-items: center;
}