/* Shop M-Pesa — modern money / transactions theme */
:root {
    --green-900: #0a3d2a;
    --green-800: #0d4f36;
    --green-700: #116b48;
    --green-600: #148a5c;
    --green-500: #1a9d6a;
    --green-100: #e6f5ee;
    --green-50: #f0faf5;
    --gold: #c9a227;
    --gold-soft: #f7f0d9;
    --bg: #f4f7f5;
    --surface: #ffffff;
    --text: #1a2e26;
    --text-muted: #5a7268;
    --border: #d8e5de;
    --danger: #b91c1c;
    --danger-soft: #fef2f2;
    --success: #15803d;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(10, 61, 42, 0.06), 0 4px 12px rgba(10, 61, 42, 0.04);
    --shadow-lg: 0 4px 20px rgba(10, 61, 42, 0.08);
    --input-bg: #ffffff;
    --table-hover: var(--green-50);
    --balance-border: #c5e4d4;
}

/* Dark mode — high contrast text and surfaces */
html.dark {
    --green-900: #8fd6b5;
    --green-800: #6bc49a;
    --green-700: #4db385;
    --green-600: #3da374;
    --green-500: #34b87a;
    --green-100: #1a3d2e;
    --green-50: #132e22;
    --gold: #e0c04a;
    --gold-soft: #3d3420;
    --bg: #0f1412;
    --surface: #1a2420;
    --text: #e8f0ec;
    --text-muted: #a0b8ae;
    --border: #2a3d34;
    --danger: #f87171;
    --danger-soft: #3b1c1c;
    --success: #4ade80;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.35), 0 4px 12px rgba(0, 0, 0, 0.25);
    --shadow-lg: 0 4px 20px rgba(0, 0, 0, 0.4);
    --input-bg: #24302b;
    --table-hover: #1f2e28;
    --balance-border: #2a4a3a;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Inter', -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.5;
}

/* ── Top bar ─────────────────────────────────────────────── */
.topbar {
    background: linear-gradient(135deg, var(--green-900) 0%, var(--green-800) 100%);
    box-shadow: 0 2px 12px rgba(10, 61, 42, 0.25);
    position: sticky;
    top: 0;
    z-index: 100;
}

.topbar-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 8px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
    min-height: 52px;
}

.brand {
    color: #fff;
    font-weight: 700;
    text-decoration: none;
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    min-width: 0;
}

.brand-icon {
    width: 32px;
    height: 32px;
    background: var(--gold);
    color: var(--green-900);
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 16px;
    letter-spacing: -0.5px;
}

.brand-text { letter-spacing: -0.2px; }

nav#mainNav {
    display: flex;
    align-items: center;
    flex-wrap: nowrap;
    gap: 4px;
    flex: 1 1 auto;
    justify-content: center;
    min-width: 0;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

nav#mainNav::-webkit-scrollbar { display: none; }

.nav-link {
    color: rgba(255, 255, 255, 0.78);
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    transition: background 0.15s, color 0.15s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    flex-shrink: 0;
    line-height: 1.2;
}

.nav-link:hover { color: #fff; background: rgba(255, 255, 255, 0.1); }

.nav-link.active {
    color: #fff;
    background: rgba(255, 255, 255, 0.2);
    box-shadow: inset 0 -2px 0 var(--gold);
}

.nav-ico {
    display: inline-flex;
    opacity: 0.85;
}

.nav-link.active .nav-ico { opacity: 1; }

/* Right cluster: user + logout (+ hamburger on mobile) */
.topbar-right {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
    margin-left: auto;
}

.nav-user {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: rgba(255, 255, 255, 0.9);
    font-size: 13px;
    padding: 4px 10px 4px 4px;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 20px;
    max-width: 130px;
}

.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.user-avatar svg { stroke: #fff; }

.user-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.nav-logout {
    color: #fecaca !important;
    width: 36px;
    height: 36px;
    padding: 0 !important;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(248, 113, 113, 0.4);
    background: rgba(185, 28, 28, 0.3);
    text-decoration: none;
    flex-shrink: 0;
}

.nav-logout:hover {
    color: #fff !important;
    background: #b91c1c !important;
    border-color: #b91c1c !important;
}

/* Hamburger (mobile only) */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 8px;
    background: rgba(255,255,255,0.1);
    border: none;
    border-radius: 8px;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    height: 2px;
    background: #fff;
    border-radius: 1px;
    transition: transform 0.2s, opacity 0.2s;
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ── Page layout ─────────────────────────────────────────── */
.page {
    max-width: 860px;
    margin: 0 auto;
    padding: 24px 16px 40px;
    flex: 1;
    width: 100%;
}

/* ── Cards ───────────────────────────────────────────────── */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px 24px;
    box-shadow: var(--shadow);
}

.form-card { margin-bottom: 24px; }

.card-head { margin-bottom: 8px; }

h1 {
    font-size: 22px;
    font-weight: 700;
    margin: 0 0 6px;
    color: var(--green-900);
    letter-spacing: -0.3px;
}

/* ── Sections ────────────────────────────────────────────── */
.section {
    margin: 22px 0;
    border-top: 1px solid var(--border);
    padding-top: 18px;
}

.section-label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
    margin: 0 0 12px;
    font-weight: 600;
}

.row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 7px 0;
    flex-wrap: wrap;
}

.row label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
}

.adjustment-row input[type="text"] { flex: 2; min-width: 100px; }
.expense-row input[type="text"] { flex: 2; min-width: 100px; }
.expense-row .exp-cat { flex: 1; min-width: 90px; }

.adjustment-row select { flex: 1; min-width: 100px; }

/* ── Inputs ──────────────────────────────────────────────── */
.amount-input,
input[type="text"],
input[type="number"],
input[type="date"],
input[type="password"],
input[type="file"],
select {
    height: 40px;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0 12px;
    font-size: 14px;
    background: var(--input-bg);
    color: var(--text);
    font-family: inherit;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.amount-input:focus,
input:focus,
select:focus {
    outline: none;
    border-color: var(--green-500);
    box-shadow: 0 0 0 3px rgba(26, 157, 106, 0.15);
}

.amount-input { width: 140px; text-align: right; font-variant-numeric: tabular-nums; }
.bank-select { width: 160px; font-weight: 500; }
.opening-input { width: 140px; text-align: right; font-variant-numeric: tabular-nums; }

/* Password visibility toggle */
.password-wrap {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
}

.password-wrap input {
    width: 100%;
    padding-right: 44px;
}

.toggle-password {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    padding: 0;
}

.toggle-password:hover { color: var(--green-700); background: var(--green-50); }

.toggle-password svg { display: block; }

/* ── Totals ──────────────────────────────────────────────── */
.total-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 14px 0;
    border-top: 1px solid var(--border);
    font-size: 15px;
    font-weight: 500;
    gap: 12px;
    flex-wrap: wrap;
}

.total-row span:last-child {
    font-size: 20px;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--green-900);
}

.balance-row {
    background: linear-gradient(135deg, var(--green-50) 0%, var(--green-100) 100%);
    border-radius: 10px;
    padding: 14px 18px;
    border: 1px solid var(--balance-border);
    border-top: 1px solid var(--balance-border);
    margin: 8px 0;
}

.balance-row span:last-child { color: var(--success); }

/* ── Buttons & links ─────────────────────────────────────── */
.link-add, .link-btn {
    background: none;
    border: none;
    color: var(--green-600);
    font-size: 13.5px;
    font-weight: 500;
    cursor: pointer;
    padding: 4px 0;
    text-decoration: none;
    font-family: inherit;
}

.link-add:hover, .link-btn:hover { color: var(--green-800); text-decoration: underline; }

.save-btn {
    width: 100%;
    margin-top: 18px;
    height: 46px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--green-700) 0%, var(--green-600) 100%);
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    box-shadow: 0 2px 8px rgba(17, 107, 72, 0.3);
    transition: transform 0.1s, box-shadow 0.15s;
}

.save-btn:hover {
    background: linear-gradient(135deg, var(--green-800) 0%, var(--green-700) 100%);
    box-shadow: 0 4px 14px rgba(17, 107, 72, 0.35);
}

.save-btn:active { transform: translateY(1px); }

.btn-secondary {
    height: 40px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--input-bg);
    color: var(--green-800);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    padding: 0 16px;
    font-family: inherit;
    transition: background 0.15s, border-color 0.15s;
}

.btn-secondary:hover {
    background: var(--green-50);
    border-color: var(--green-500);
}

/* ── Tables ──────────────────────────────────────────────── */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
}

.data-table th, .data-table td {
    text-align: left;
    padding: 11px 8px;
    font-size: 14px;
    border-bottom: 1px solid var(--border);
}

.data-table th {
    color: var(--text-muted);
    font-weight: 600;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.data-table tbody tr:hover { background: var(--table-hover); }

.text-danger { color: var(--danger); }
.text-success { color: var(--success); }

.empty-state {
    color: var(--text-muted);
    font-size: 14px;
    padding: 20px 0;
    text-align: center;
}

.hint {
    color: var(--text-muted);
    font-size: 13.5px;
    margin: 0 0 14px;
}

.success-text {
    color: var(--success);
    background: var(--green-50);
    border: 1px solid #c5e4d4;
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 14px;
    margin: 0 0 16px;
}

.error-text {
    color: var(--danger);
    background: var(--danger-soft);
    border: 1px solid #fecaca;
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 14px;
    margin: 0 0 16px;
}

/* ── Category form ───────────────────────────────────────── */
.add-category-form {
    display: flex;
    gap: 10px;
    margin-top: 18px;
    flex-wrap: wrap;
}

.add-category-form input { flex: 1; min-width: 160px; }

.add-category-form button {
    border: none;
    background: linear-gradient(135deg, var(--green-700) 0%, var(--green-600) 100%);
    color: #fff;
    border-radius: 8px;
    padding: 0 18px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    font-family: inherit;
    height: 40px;
}

/* ── Login ───────────────────────────────────────────────── */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 80px);
    padding: 20px;
    background: linear-gradient(160deg, var(--green-50) 0%, var(--bg) 50%, #e8f0eb 100%);
}

.login-card {
    width: 100%;
    max-width: 380px;
    box-shadow: var(--shadow-lg);
}

.login-card h1 { margin-bottom: 6px; font-size: 18px; }

.field {
    margin-bottom: 14px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.field label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
}

.field input { width: 100%; }

/* ── Form grids (expenses / settings) ────────────────────── */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px 16px;
}

.field-wide { grid-column: 1 / -1; }

.expense-form .save-btn { margin-top: 16px; }

.filter-form { margin-bottom: 8px; }

.filter-row {
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 10px;
}

.filter-row label {
    font-size: 13px;
    color: var(--text-muted);
}

/* ── Settings / profile photo ────────────────────────────── */
.profile-photo-row {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.avatar-wrap { flex-shrink: 0; }

.avatar-img {
    width: 88px;
    height: 88px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--green-100);
    box-shadow: var(--shadow);
}

.avatar-placeholder {
    width: 88px;
    height: 88px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--green-600), var(--green-800));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: 700;
    border: 3px solid var(--green-100);
}

.photo-actions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.photo-upload-form {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.photo-upload-form input[type="file"] {
    height: auto;
    padding: 6px;
    border: 1px dashed var(--border);
    background: var(--green-50);
    max-width: 220px;
}

/* ── Action buttons (Remove / Restore / Delete / Debt actions) ───────────── */
.btn-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    height: 30px;
    padding: 0 12px;
    border-radius: 8px;
    font-size: 12.5px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text);
    transition: background 0.15s, border-color 0.15s, color 0.15s;
    text-decoration: none;
}
.btn-action:hover {
    background: var(--green-50);
    border-color: var(--green-500);
}

.btn-remove {
    color: #b91c1c;
    background: #fef2f2;
    border-color: #fecaca;
}

.btn-remove:hover {
    background: #fee2e2;
    border-color: #f87171;
    color: #991b1b;
}

.btn-restore {
    color: var(--green-700);
    background: var(--green-50);
    border-color: #c5e4d4;
}

.btn-restore:hover {
    background: var(--green-100);
    border-color: var(--green-500);
}

.btn-add {
    color: var(--green-700);
    background: var(--green-50);
    border-color: #c5e4d4;
    text-decoration: none;
    margin-top: 6px;
}

.btn-add:hover {
    background: var(--green-100);
    border-color: var(--green-500);
    color: var(--green-900);
    text-decoration: none;
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 8px;
    color: var(--green-700);
    background: var(--green-50);
    border: 1px solid #c5e4d4;
    text-decoration: none;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.btn-icon:hover {
    background: var(--green-100);
    border-color: var(--green-500);
    color: var(--green-900);
}


/* ── View record ─────────────────────────────────────────── */
.view-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    flex-wrap: wrap;
}

.view-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
}

.view-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 12px;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
}

.view-row:last-child { border-bottom: none; }

.view-row strong {
    font-variant-numeric: tabular-nums;
    font-weight: 600;
    color: var(--green-900);
}

.hint-inline {
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 400;
    margin-left: 4px;
}

.actions-cell {
    display: flex;
    gap: 6px;
    align-items: center;
    white-space: nowrap;
}

.inline-form {
    display: inline;
    margin: 0;
    padding: 0;
}

.btn-icon-danger {
    color: var(--danger);
    background: var(--danger-soft);
    border-color: #fecaca;
}

.btn-icon-danger:hover {
    background: #fee2e2;
    border-color: #f87171;
    color: #991b1b;
}

.flash {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 14px;
}

.flash-success {
    color: var(--success);
    background: var(--green-50);
    border: 1px solid #c5e4d4;
}

.flash-error {
    color: var(--danger);
    background: var(--danger-soft);
    border: 1px solid #fecaca;
}

.view-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    align-items: center;
}

/* ── Footer ──────────────────────────────────────────────── */
.site-footer {
    background: var(--green-900);
    color: rgba(255, 255, 255, 0.7);
    margin-top: auto;
}

.footer-inner {
    max-width: 860px;
    margin: 0 auto;
    padding: 16px 20px;
    text-align: center;
}

.footer-inner p {
    margin: 0;
    font-size: 13px;
    letter-spacing: 0.01em;
}

.footer-dev {
    margin-top: 4px !important;
    font-size: 12px !important;
    color: rgba(255, 255, 255, 0.5);
}

/* ── Install / Download app ──────────────────────────────── */
.btn-install {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--gold);
    color: var(--green-900);
    border: none;
    border-radius: 8px;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    white-space: nowrap;
}
.btn-install:hover { filter: brightness(1.08); }
.btn-install svg { flex-shrink: 0; }

.footer-install {
    margin-top: 10px !important;
}
.btn-install-footer {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(255,255,255,0.12);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.25);
    border-radius: 8px;
    padding: 8px 14px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
}
.btn-install-footer:hover { background: rgba(255,255,255,0.2); }
.install-hint {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: rgba(255,255,255,0.55);
}

.btn-install-login {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--green-100);
    color: var(--green-800);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 12px 16px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
}
.btn-install-login:hover { background: var(--green-50); }

@media (max-width: 600px) {
    .btn-install .install-label { display: none; }
    .btn-install { padding: 8px; }
}

/* ── Mobile / responsive ─────────────────────────────────── */
@media (max-width: 900px) {
    /* Keep logout + user on the far right; hide nav links behind hamburger */
    .nav-toggle { display: flex; }

    nav#mainNav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--green-900);
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        padding: 8px 12px 16px;
        gap: 2px;
        box-shadow: 0 8px 24px rgba(0,0,0,0.25);
        border-top: 1px solid rgba(255,255,255,0.1);
        flex: none;
        overflow: visible;
    }

    nav#mainNav.open { display: flex; }

    .nav-link {
        padding: 12px 14px;
        font-size: 15px;
        border-radius: 8px;
        flex-shrink: 1;
    }

    .nav-link.active {
        box-shadow: none;
        background: rgba(255, 255, 255, 0.18);
    }

    .topbar-right {
        margin-left: auto;
    }

    .nav-user .user-name {
        display: none; /* icon only on smaller screens to save space */
    }

    .nav-user {
        max-width: none;
        padding: 4px;
    }

    .brand-text { font-size: 14px; max-width: 160px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

    .page { padding: 16px 12px 32px; }

    .card { padding: 16px; }

    h1 { font-size: 19px; }

    .form-grid { grid-template-columns: 1fr; }
    .field-wide { grid-column: 1; }

    .amount-input, .opening-input { width: 120px; }
    .bank-select { width: 130px; }

    .row { gap: 8px; }

    .data-table { font-size: 13px; display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }
    .data-table th, .data-table td { padding: 10px 6px; white-space: nowrap; }

    .total-row span:last-child { font-size: 18px; }

    .add-category-form { flex-direction: column; }
    .add-category-form button { width: 100%; }

    .profile-photo-row { flex-direction: column; align-items: flex-start; }

    .filter-row { flex-direction: column; align-items: stretch; }
    .filter-row input[type="date"] { width: 100%; }
    .filter-row .btn-secondary { width: 100%; }
}

@media (max-width: 400px) {
    .brand-text { font-size: 13px; max-width: 110px; }
    .amount-input, .opening-input { width: 100px; }
    .nav-user { display: none; } /* keep only logout + hamburger on very small screens */
}

/* ── Debts reminder & badges ─────────────────────────────── */
.debt-reminder-card {
    border-left: 4px solid var(--danger);
}
.debt-reminder-list li:last-child {
    border-bottom: none !important;
}
.status-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}
.status-open { background: var(--danger-soft); color: var(--danger); }
.status-partial { background: var(--gold-soft); color: #8a6d00; }
.status-paid { background: var(--green-100); color: var(--success); }
.btn-paid { color: var(--success) !important; }

/* ── Theme toggle — one icon only (moon in light, sun in dark) ── */
.btn-theme {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.25);
    background: rgba(255, 255, 255, 0.12);
    color: #fbbf24;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    position: relative;
    transition: background 0.15s, border-color 0.15s;
}
.btn-theme:hover {
    background: rgba(255, 255, 255, 0.22);
    border-color: rgba(255, 255, 255, 0.4);
}
.btn-theme .icon-sun,
.btn-theme .icon-moon {
    display: none !important;
    width: 18px;
    height: 18px;
}
/* Light mode → moon only (click to switch to dark) */
html:not(.dark) .btn-theme .icon-moon {
    display: block !important;
}
/* Dark mode → sun only (click to switch to light) */
html.dark .btn-theme .icon-sun {
    display: block !important;
}

/* ── Dark mode contrast fixes ────────────────────────────── */
html.dark h1 {
    color: var(--green-900);
}
html.dark .status-partial {
    color: #e0c04a;
}
html.dark .success-text {
    border-color: var(--balance-border);
}
html.dark .error-text {
    border-color: #7f1d1d;
}
html.dark .login-page {
    background: linear-gradient(160deg, var(--green-50) 0%, var(--bg) 50%, #0f1a15 100%);
}
html.dark .card {
    background: var(--surface);
    border-color: var(--border);
}
html.dark .data-table th {
    color: var(--text-muted);
}
html.dark .data-table td {
    color: var(--text);
}
html.dark .hint {
    color: var(--text-muted);
}
html.dark .section-label {
    color: var(--text-muted);
}
html.dark .total-row span:last-child {
    color: var(--green-900);
}
html.dark input::placeholder,
html.dark textarea::placeholder {
    color: #7a9488;
    opacity: 1;
}
html.dark .btn-action {
    background: #24302b;
    border-color: var(--border);
    color: #e8f0ec !important;
}
html.dark .btn-action:hover {
    background: #2f3f38;
    border-color: var(--green-500);
    color: #fff !important;
}
html.dark .btn-paid {
    color: #4ade80 !important;
    border-color: #166534;
    background: #14532d;
}
html.dark .btn-delete {
    color: #fca5a5 !important;
    border-color: #7f1d1d;
    background: #450a0a;
}
html.dark .btn-partial,
html.dark .btn-edit-debt {
    color: #e8f0ec !important;
}
html.dark .active-filter {
    background: var(--green-100);
    color: var(--text) !important;
}
html.dark .data-table strong {
    color: var(--text);
}
html.dark .hint {
    color: var(--text-muted) !important;
}
html.dark h1,
html.dark h2,
html.dark h3 {
    color: var(--text) !important;
}
html.dark .card-head p,
html.dark .card p {
    color: var(--text-muted);
}
html.dark .modal-card {
    background: var(--surface);
    color: var(--text);
}
html.dark .modal-overlay {
    background: rgba(0, 0, 0, 0.65);
}
html.dark .site-footer {
    color: var(--text-muted);
    border-top-color: var(--border);
}
html.dark .nav-link {
    color: rgba(255, 255, 255, 0.85);
}
html.dark .topbar {
    background: linear-gradient(135deg, #06261a 0%, #0a3d2a 100%);
}