:root {
    --bg: #f4f6f8;
    --panel: #ffffff;
    --text: #1e2933;
    --muted: #697586;
    --line: #d9e2ec;
    --primary: #1f7a8c;
    --primary-dark: #155e6c;
    --accent: #d97706;
    --danger: #b42318;
    --success: #087f5b;
    --shadow: 0 10px 30px rgba(16, 24, 40, .08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a {
    color: inherit;
    text-decoration: none;
}

.app-shell {
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: 100vh;
}

.sidebar {
    background: #102a43;
    color: #f8fafc;
    padding: 24px 18px;
}

.brand {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 28px;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 8px;
    background: var(--primary);
    font-weight: 800;
}

.brand-mark img {
    display: block;
    max-width: 32px;
    max-height: 32px;
    object-fit: contain;
}

.brand small {
    display: block;
    color: #bcccdc;
    margin-top: 2px;
}

.main-nav {
    display: grid;
    gap: 6px;
}

.sidebar-action {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    margin-bottom: 18px;
    padding: 11px 14px;
    border-radius: 8px;
    background: var(--primary);
    color: #ffffff;
    font-weight: 800;
    box-shadow: 0 12px 24px rgba(31, 122, 140, .22);
}

.sidebar-action::before {
    content: "+";
    display: inline-grid;
    place-items: center;
    width: 20px;
    height: 20px;
    margin-right: 8px;
    border-radius: 999px;
    background: rgba(255, 255, 255, .22);
    font-size: 17px;
    line-height: 1;
}

.sidebar-action:hover {
    background: var(--primary-dark);
}

.main-nav a {
    padding: 11px 12px;
    border-radius: 8px;
    color: #d9e2ec;
}

.main-nav a:hover,
.main-nav a.is-active {
    background: rgba(255, 255, 255, .11);
    color: #ffffff;
}

.main {
    padding: 28px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: center;
    margin-bottom: 24px;
}

.topbar h1 {
    margin: 0;
    font-size: 28px;
}

.topbar p {
    color: var(--muted);
    margin: 6px 0 0;
}

.user-menu {
    display: flex;
    gap: 12px;
    align-items: center;
}

.grid {
    display: grid;
    gap: 18px;
}

.grid.cols-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid.cols-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.panel,
.metric,
.auth-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.panel {
    padding: 20px;
}

.metric {
    padding: 18px;
}

.metric span {
    color: var(--muted);
    font-size: 13px;
}

.metric strong {
    display: block;
    margin-top: 8px;
    font-size: 26px;
}

.panel-head {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    align-items: center;
    margin-bottom: 16px;
}

.panel-head h2 {
    margin: 0;
    font-size: 19px;
}

.panel-head p {
    margin: 5px 0 0;
    color: var(--muted);
}

.dashboard-chart-panel {
    margin-top: 18px;
}

.dashboard-chart-head {
    align-items: flex-start;
}

.year-filter {
    display: flex;
    gap: 8px;
    align-items: center;
}

.year-filter label {
    margin: 0;
}

.year-filter select {
    width: auto;
    min-width: 110px;
}

.chart-summary {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 18px;
}

.chart-summary div {
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #f8fafc;
}

.chart-summary span {
    display: block;
    color: var(--muted);
    font-size: 13px;
}

.chart-summary strong {
    display: block;
    margin-top: 6px;
    font-size: 22px;
}

.monthly-charts {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    padding-top: 18px;
    border-top: 1px solid var(--line);
}

.mini-chart {
    min-width: 0;
}

.mini-chart-head {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: baseline;
    margin-bottom: 12px;
}

.mini-chart-head h3 {
    margin: 0;
    font-size: 15px;
}

.mini-chart-head strong {
    font-size: 15px;
}

.monthly-chart {
    display: grid;
    grid-template-columns: 94px minmax(0, 1fr);
    gap: 10px;
}

.chart-axis {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 220px;
    padding-bottom: 30px;
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
    text-align: right;
}

.chart-plot {
    position: relative;
    min-width: 0;
}

.chart-grid-lines {
    position: absolute;
    inset: 0 0 30px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    pointer-events: none;
}

.chart-grid-lines span {
    border-top: 1px solid #e6edf5;
}

.chart-months {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(12, minmax(20px, 1fr));
    gap: 8px;
    height: 220px;
}

.chart-month {
    display: grid;
    grid-template-rows: minmax(0, 1fr) 22px;
    gap: 8px;
    min-width: 0;
}

.chart-bars {
    display: flex;
    align-items: end;
    justify-content: center;
    min-height: 0;
}

.chart-bar {
    display: block;
    width: min(18px, 72%);
    border-radius: 5px 5px 0 0;
}

.money-bar {
    background: var(--primary);
}

.hours-bar {
    background: var(--success);
}

.chart-month strong {
    color: var(--muted);
    font-size: 12px;
    text-align: center;
}

.chart-legend {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 14px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
}

.chart-legend span {
    display: inline-flex;
    gap: 7px;
    align-items: center;
}

.chart-legend i {
    width: 10px;
    height: 10px;
    border-radius: 999px;
}

.money-dot {
    background: var(--primary);
}

.hours-dot {
    background: var(--success);
}

.button,
button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 8px 13px;
    border: 0;
    border-radius: 8px;
    background: var(--primary);
    color: #ffffff;
    font-weight: 700;
    cursor: pointer;
}

.button:hover,
button:hover {
    background: var(--primary-dark);
}

.button.ghost {
    background: #edf2f7;
    color: var(--text);
}

.button.danger {
    background: var(--danger);
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 12px 10px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

.table th {
    color: var(--muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: .04em;
}

.actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

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

label {
    display: block;
    margin-bottom: 6px;
    color: var(--muted);
    font-size: 13px;
    font-weight: 700;
}

input,
select,
textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 10px 11px;
    font: inherit;
    background: #ffffff;
}

input[type="checkbox"] {
    width: auto;
}

textarea {
    min-height: 110px;
    resize: vertical;
}

.form-actions {
    display: flex;
    gap: 10px;
    margin-top: 16px;
}

.client-toolbar {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    align-items: center;
    margin-bottom: 18px;
}

.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 18px;
    border-bottom: 1px solid var(--line);
}

.tabs a {
    padding: 10px 12px;
    border-bottom: 3px solid transparent;
    color: var(--muted);
    font-weight: 800;
}

.tabs a:hover,
.tabs a.is-active {
    border-bottom-color: var(--primary);
    color: var(--text);
}

.search-form {
    display: grid;
    grid-template-columns: minmax(0, 300px) auto auto;
    gap: 10px;
    align-items: center;
    min-width: min(100%, 440px);
}

.search-form input {
    min-width: 0;
}

.search-form button,
.search-form .button {
    white-space: nowrap;
}

.badge {
    display: inline-flex;
    padding: 4px 8px;
    border-radius: 999px;
    background: #edf2f7;
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
}

.badge.active {
    background: #d3f9d8;
    color: var(--success);
}

.badge.exhausted,
.badge.expired,
.badge.cancelled {
    background: #ffe3e3;
    color: var(--danger);
}

.table-toggle {
    display: block;
    min-height: 0;
    margin-top: 8px;
    padding: 0;
    background: transparent;
    color: var(--primary);
    cursor: pointer;
    font-size: 13px;
    font-weight: 700;
    text-align: left;
}

.table-toggle:hover {
    background: transparent;
    color: var(--primary-dark);
}

.table-toggle[aria-expanded="true"]::before {
    content: "▾ ";
}

.table-toggle[aria-expanded="false"]::before {
    content: "▸ ";
}

.usage-detail-row td {
    background: #f8fafc;
    border-bottom-color: #e6edf5;
    padding-top: 10px;
    padding-bottom: 10px;
}

.usage-detail-row span {
    color: var(--muted);
}

.alert {
    padding: 12px 14px;
    border-radius: 8px;
    margin-bottom: 18px;
    background: #d3f9d8;
    color: var(--success);
    font-weight: 700;
}

.alert.error {
    background: #ffe3e3;
    color: var(--danger);
}

.auth-page {
    display: grid;
    min-height: 100vh;
    place-items: center;
    padding: 20px;
}

.auth-card {
    width: min(440px, 100%);
    padding: 28px;
}

.auth-card h1 {
    margin: 0 0 8px;
}

.auth-logo {
    display: block;
    width: 150px;
    max-width: 100%;
    max-height: 70px;
    object-fit: contain;
    margin: 0 0 18px;
}

.auth-card p {
    color: var(--muted);
    margin: 0 0 22px;
}

@media (max-width: 980px) {
    .app-shell {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
    }

    .main-nav {
        grid-template-columns: repeat(5, minmax(0, 1fr));
    }

    .grid.cols-4,
    .grid.cols-2,
    .form-grid {
        grid-template-columns: 1fr;
    }

    .monthly-chart {
        grid-template-columns: 86px minmax(360px, 1fr);
    }

    .monthly-charts {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .main {
        padding: 18px;
    }

    .topbar,
    .panel-head {
        align-items: flex-start;
        flex-direction: column;
    }

    .main-nav {
        grid-template-columns: 1fr 1fr;
    }

    .search-form {
        width: 100%;
        min-width: 0;
    }

    .monthly-chart {
        grid-template-columns: 78px minmax(320px, 1fr);
        overflow-x: auto;
    }

    .chart-summary {
        grid-template-columns: 1fr;
    }
}