:root {
    --color-primary:       #3ba728;
    --color-primary-dark:  #106011;
    --color-primary-light: #83cf84;

    --color-bg:          #99af99;
    --color-surface:     #ffffff;
    --color-surface-alt: #b9e6bb;

    --color-text:       #120c0c;
    --color-text-muted: #3c3b3b;

    --color-border:     #c3edc3;

    --color-danger:     #e74c3c;
    --color-success-bg: #d4f5e2;

    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --shadow-sm: 0 1px 4px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 2px 12px rgba(0, 0, 0, 0.09);
    --shadow-lg: 0 6px 24px rgba(0, 0, 0, 0.13);

    --sidebar-width:  260px;
    --topbar-height:  60px;

    --transition-fast: 0.2s ease;
    --transition-main: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    background-color: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
}

.skip-link {
    position: fixed;
    top: -100px;
    left: 12px;
    z-index: 9999;
    background-color: var(--color-primary-dark);
    color: #ffffff;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.88rem;
    transition: top 0.25s ease;
}

.skip-link:focus {
    top: 12px;
}

#sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: var(--sidebar-width);
    z-index: 200;

    display: flex;
    flex-direction: column;

    transition: transform var(--transition-main);

    background-color: var(--color-surface);
    border-right: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
}

/* Sidebar hidden by default — toggled via JS on all screen sizes */
body.sidebar-closed #sidebar {
    transform: translateX(calc(-1 * var(--sidebar-width)));
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-shrink: 0;

    padding: 1.2rem 1rem;
    border-bottom: 1px solid var(--color-border);
}

.sidebar-logo {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    display: grid;
    place-items: center;
    font-size: 1.1rem;

    background: var(--color-primary-light);
    border-radius: var(--radius-sm);
    color: #ffffff;
}

.sidebar-title {
    font-weight: 600;
    font-size: 0.93rem;
    white-space: nowrap;
    color: var(--color-text);
}

#sidebar-close {
    margin-left: auto;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    line-height: 1;
    flex-shrink: 0;

    color: var(--color-text-muted);
    padding: 5px 7px;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background var(--transition-fast);
}

#sidebar-close:hover,
#sidebar-close:focus {
    color: var(--color-text);
    background: var(--color-bg);
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

nav ul {
    list-style: none;
    flex: 1;
    overflow-y: auto;
    padding: 0.9rem 0.75rem;
}

nav ul li + li {
    margin-top: 3px;
}

nav ul li a {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: background var(--transition-fast),
    color var(--transition-fast),
    transform var(--transition-fast);

    padding: 0.6rem 0.85rem;
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
}

nav ul li a .nav-icon {
    width: 22px;
    text-align: center;
    flex-shrink: 0;
    font-size: 0.95rem;
}

nav ul li a:hover,
nav ul li a:focus {
    transform: translateX(2px);
    background: var(--color-surface-alt);
    color: var(--color-primary-dark);
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.sidebar-footer {
    flex-shrink: 0;
    padding: 0.85rem 1.1rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.77rem;
    color: var(--color-text-muted);
}

#overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 150;
    background: rgba(0, 0, 0, 0.4);
}

body.sidebar-open #overlay {
    display: block;
    animation: overlayFadeIn 0.25s ease forwards;
}

@keyframes overlayFadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

#main-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    margin-left: 0;
    transition: margin-left var(--transition-main);
}

#topbar {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--topbar-height);

    display: flex;
    align-items: center;
    gap: var(--space-md);

    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: #ffffff;
    padding: 0 1.4rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

#sidebar-open {
    border: none;
    cursor: pointer;
    flex-shrink: 0;
    display: grid;
    place-items: center;
    transition: background var(--transition-fast);

    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.2);
    color: #ffffff;
    border-radius: var(--radius-sm);
    font-size: 1.15rem;
}

#sidebar-open:hover,
#sidebar-open:focus {
    background: rgba(255, 255, 255, 0.35);
    outline: 2px solid rgba(255, 255, 255, 0.8);
    outline-offset: 2px;
}

#topbar h1 {
    font-size: 1.15rem;
    font-weight: 700;
}

main {
    flex: 1;
    width: 100%;
    padding: 1.4rem 1rem;
    max-width: 1100px;
}

section {
    transition: box-shadow var(--transition-fast);

    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md);
}

section:hover {
    box-shadow: var(--shadow-lg);
}

section h2 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-primary-dark);
    margin-bottom: 1.1rem;
    padding-bottom: 0.55rem;
    border-bottom: 2px solid var(--color-border);
}

#about p {
    color: var(--color-text-muted);
    font-size: 0.92rem;
}

.contact-links {
    display: flex;
    flex-direction: column;
    margin-top: 0.85rem;
    gap: 0.4rem;
}

.contact-links a {
    text-decoration: none;
    width: fit-content;
    color: var(--color-primary-dark);
    font-size: 0.9rem;
    font-weight: 500;
}

.contact-links a:hover,
.contact-links a:focus {
    text-decoration: underline;
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(155px, 1fr));
    gap: 1rem;
}

.stat-card {
    text-align: center;
    transition: transform var(--transition-fast),
    box-shadow var(--transition-fast);

    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1.1rem 1rem;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-card h3 {
    text-transform: uppercase;
    letter-spacing: 0.06em;

    font-size: 0.74rem;
    font-weight: 600;
    color: var(--color-text-muted);
    margin-bottom: 0.45rem;
}

.stat-value {
    line-height: 1.1;
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--color-primary-dark);
}

.budget-status {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    background: var(--color-success-bg);
    border: 1px solid var(--color-border);
    color: var(--color-primary-dark);
}

#trend-chart {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;

    height: 100px;
    margin-top: 1.2rem;
    gap: 4px;
    border-bottom: 2px solid var(--color-border);
}

.chart-bar {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    transition: background var(--transition-fast);

    background: var(--color-primary);
    border-radius: 3px 3px 0 0;
}

.chart-bar:hover {
    background: var(--color-primary-dark);
}

.chart-label {
    font-size: 0.65rem;
    color: var(--color-text-muted);
    margin-top: 4px;
}

.records-controls {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.1rem;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.search-box label {
    white-space: nowrap;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.search-box input {
    font-family: inherit;
    transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast);

    padding: 0.45rem 0.8rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    background: var(--color-surface-alt);
    color: var(--color-text);
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 167, 40, 0.2);
}

.sort-controls {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.4rem;
    font-size: 0.83rem;
    color: var(--color-text-muted);
}

.sort-btn {
    cursor: pointer;
    font-family: inherit;
    transition: background var(--transition-fast),
    border-color var(--transition-fast),
    color var(--transition-fast);

    padding: 0.35rem 0.8rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    background: var(--color-surface);
    color: var(--color-text);
}

.sort-btn:hover,
.sort-btn:focus {
    background: var(--color-primary-dark);
    border-color: var(--color-primary);
    color: #ffffff;
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.sort-btn.active {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: #ffffff;
}

.table-container {
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
}

#transactions-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

#transactions-table thead {
    background: var(--color-surface-alt);
}

#transactions-table th {
    text-align: left;
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: 0.06em;

    padding: 0.7rem 1rem;
    font-size: 0.74rem;
    font-weight: 600;
    color: var(--color-text-muted);
    border-bottom: 2px solid var(--color-border);
}

#transactions-table td {
    padding: 0.65rem 1rem;
    color: var(--color-text);
    border-top: 1px solid var(--color-border);
}

#transactions-table tbody tr {
    transition: background var(--transition-fast);
}

#transactions-table tbody tr:hover td {
    background: #e8f8e8;
}

.table-empty {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

mark {
    border-radius: 2px;
    padding: 0 2px;
    background: #fff176;
    color: var(--color-text);
}

#transaction-form {
    max-width: 480px;
}

.form-group {
    margin-bottom: 1.1rem;
}

.form-group label {
    display: block;
    font-size: 0.87rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.35rem;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group select {
    width: 100%;
    font-family: inherit;
    transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast);

    padding: 0.55rem 0.85rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    background: var(--color-surface-alt);
    color: var(--color-text);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 167, 40, 0.2);
}

.error-message {
    min-height: 1rem;
    color: var(--color-danger);
    font-size: 0.78rem;
    margin-top: 0.3rem;
}

.form-group input.invalid,
.form-group select.invalid {
    border-color: var(--color-danger);
}

button[type="submit"],
#save-cap,
#save-rates {
    cursor: pointer;
    font-family: inherit;
    font-weight: 600;
    transition: transform var(--transition-fast),
    box-shadow var(--transition-fast);

    padding: 0.58rem 1.3rem;
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary-dark));
    color: #ffffff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    box-shadow: 0 2px 6px rgba(16, 96, 17, 0.3);
    margin-right: 0.5rem;
    margin-top: 0.3rem;
}

button[type="submit"]:hover,
#save-cap:hover,
#save-rates:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(16, 96, 17, 0.4);
}

button[type="submit"]:active {
    transform: translateY(0);
}

button[type="submit"]:focus,
#save-cap:focus,
#save-rates:focus {
    outline: 2px solid var(--color-primary-dark);
    outline-offset: 2px;
}

button[type="reset"],
#export-data {
    cursor: pointer;
    font-family: inherit;
    font-weight: 500;
    transition: background var(--transition-fast),
    border-color var(--transition-fast);

    padding: 0.55rem 1.2rem;
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    margin-right: 0.5rem;
    margin-top: 0.3rem;
}

button[type="reset"]:hover,
#export-data:hover {
    background: var(--color-surface-alt);
    border-color: var(--color-primary);
}

button[type="reset"]:focus,
#export-data:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.btn-danger {
    cursor: pointer;
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 500;
    transition: background var(--transition-fast), color var(--transition-fast);

    padding: 0.3rem 0.65rem;
    background: #fdecea;
    color: var(--color-danger);
    border: 1px solid var(--color-danger);
    border-radius: var(--radius-sm);
}

.btn-danger:hover {
    background: var(--color-danger);
    color: #ffffff;
}

.btn-danger:focus {
    outline: 2px solid var(--color-danger);
    outline-offset: 2px;
}

.btn-edit {
    cursor: pointer;
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 500;
    transition: background var(--transition-fast), color var(--transition-fast);

    padding: 0.3rem 0.65rem;
    background: var(--color-surface-alt);
    color: var(--color-primary-dark);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-sm);
    margin-right: 0.3rem;
}

.btn-edit:hover {
    background: var(--color-primary-dark);
    color: #ffffff;
}

.btn-edit:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.settings-group {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.settings-group:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.settings-group h3 {
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-size: 0.83rem;
    font-weight: 600;
    color: var(--color-text-muted);
    margin-bottom: 0.8rem;
}

.settings-inline {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.settings-inline label {
    white-space: nowrap;
    font-size: 0.88rem;
    font-weight: 500;
}

.settings-inline input[type="number"],
.settings-inline input[type="text"] {
    font-family: inherit;
    width: 140px;
    padding: 0.45rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    background: var(--color-surface-alt);
    color: var(--color-text);
}

.settings-inline input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 167, 40, 0.2);
}

.currency-row {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 0.5rem;
}

.import-group {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    margin-top: 0.75rem;
    gap: 0.75rem;
    font-size: 0.88rem;
}

#import-feedback {
    font-size: 0.85rem;
    margin-top: 0.5rem;
    min-height: 1rem;
}

#import-feedback.success { color: var(--color-primary-dark); }
#import-feedback.error   { color: var(--color-danger); }

footer {
    text-align: center;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 1rem 1.4rem;
    font-size: 0.78rem;
    color: var(--color-text-muted);
}

#status-message {
    min-height: 1.2rem;
    font-size: 0.88rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
}

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

.hidden  { display: none !important; }
.visible { display: block !important; }

/* ── Tablet and up (768px+) ───────────────────────────────────────────────── */
/* Sidebar pushes content rather than overlaying it.                          */
/* Toggle still works — overlay is hidden because content shifts instead.     */
@media (min-width: 768px) {

    /* When sidebar is open, push main content to the right */
    body:not(.sidebar-closed) #main-wrapper {
        margin-left: var(--sidebar-width);
    }

    /* No dark overlay on desktop — content pushes instead */
    #overlay {
        display: none !important;
    }

}

/* ── Desktop (1024px+) ────────────────────────────────────────────────────── */
@media (min-width: 1024px) {

    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    main {
        padding: 2rem 1.6rem;
    }

    .records-controls {
        flex-wrap: nowrap;
    }

}

/* ── Very small screens (360px and below) ────────────────────────────────── */
@media (max-width: 360px) {

    .stat-value {
        font-size: 1.2rem;
    }

    #topbar h1 {
        font-size: 0.95rem;
    }

    section {
        padding: 1rem 0.75rem;
    }

    .sort-controls {
        flex-direction: column;
        align-items: flex-start;
    }

    button[type="submit"],
    button[type="reset"] {
        width: 100%;
        margin-right: 0;
    }

}