:root {
    --color-bg: #eef0f1;
    --color-surface: #ffffff;
    --color-border: #e2e4e9;
    --color-text: #24262b;
    --color-muted: #767b85;
    --color-primary: #7ab928;
    --color-primary-hover: #669e1f;
    --color-danger: #d92d20;
    --color-navbar: #1c1d1f;
    --radius: 6px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    font-size: 14px;
}

/* Top navigation, FastBill-inspired */
.topbar {
    background: var(--color-navbar);
    color: #fff;
}

.topbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    height: 52px;
    padding: 0 20px;
}

.brand {
    color: #fff;
    font-weight: 800;
    font-size: 18px;
    text-decoration: none;
    margin-right: 32px;
    letter-spacing: -0.02em;
}

.topnav { display: flex; align-items: center; height: 100%; flex: 1; }

.topnav a {
    color: #cfd2d6;
    text-decoration: none;
    font-size: 13px;
    font-weight: 600;
    padding: 0 16px;
    height: 100%;
    display: flex;
    align-items: center;
    white-space: nowrap;
}

.topnav a:hover { color: #fff; }

.topnav a.active {
    background: var(--color-primary);
    color: #fff;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-left: auto;
}

.company-name { color: #cfd2d6; font-size: 13px; font-weight: 600; }

.topbar-right .btn {
    background: transparent;
    border-color: #4a4c50;
    color: #cfd2d6;
}

.topbar-right .btn:hover { background: #2c2d30; color: #fff; }

.main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 20px 60px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.page-header h2 {
    margin: 0;
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -0.01em;
}

.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
}

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

th, td {
    text-align: left;
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border);
    font-size: 13px;
}

th { color: var(--color-muted); font-weight: 700; text-transform: uppercase; font-size: 11px; letter-spacing: 0.03em; }

tr:last-child td { border-bottom: none; }

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

.btn {
    display: inline-block;
    padding: 8px 14px;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    background: var(--color-surface);
    color: var(--color-text);
    text-decoration: none;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
}

.btn:hover { background: var(--color-bg); }

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

.btn-primary:hover { background: var(--color-primary-hover); border-color: var(--color-primary-hover); }

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

.btn-small { padding: 5px 10px; font-size: 12px; }

.form-row { margin-bottom: 14px; }

.form-row label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    font-size: 13px;
}

.form-row input[type=text],
.form-row input[type=email],
.form-row input[type=password],
.form-row input[type=number],
.form-row input[type=date],
.form-row input[type=file],
.form-row select,
.form-row textarea {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 13px;
    font-family: inherit;
}

.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(122, 185, 40, 0.15);
}

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }

.hint { color: var(--color-muted); font-size: 12px; margin-top: 4px; }

.flash {
    padding: 10px 14px;
    border-radius: var(--radius);
    margin-bottom: 18px;
    font-size: 13px;
}

.flash-success { background: #eef7e0; color: #4a6e1a; border: 1px solid #cfe6a6; }
.flash-error { background: #fef3f2; color: #b42318; border: 1px solid #fecdca; }

.items-table input,
.items-table select { width: 100%; border: 1px solid var(--color-border); border-radius: 6px; padding: 6px 8px; font-size: 13px; }
.items-table input[type=number] { text-align: right; }
.items-table td { vertical-align: top; }

.tag {
    display: inline-block;
    padding: 3px 9px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    background: #8a7a6a;
    color: #fff;
}

.tag-green { background: var(--color-primary); }

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

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-navbar);
}

.login-box {
    background: var(--color-surface);
    border-radius: var(--radius);
    padding: 32px;
    width: 320px;
}

.login-box h1 { font-size: 20px; font-weight: 800; margin-top: 0; }

.text-muted { color: var(--color-muted); }
.text-right { text-align: right; }
.mt-0 { margin-top: 0; }

#modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(20, 22, 30, 0.6);
    z-index: 1000;
    align-items: flex-start;
    justify-content: center;
    overflow-y: auto;
    padding: 40px 20px;
}

#modal-box {
    background: var(--color-bg);
    border-radius: var(--radius);
    width: 100%;
    max-width: 720px;
    padding: 0 0 20px;
}

#modal-close {
    display: block;
    margin: 0 auto 16px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius);
    background: var(--color-navbar);
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
}

#modal-content .card:first-of-type { margin-top: 0; }

.collapsible-summary {
    font-size: 13px;
    color: var(--color-muted);
    margin-bottom: 14px;
}

.collapsible-summary button {
    background: none;
    border: none;
    color: var(--color-primary);
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    padding: 0;
    margin-left: 4px;
}

.collapsible-panel { display: none; }
.collapsible-panel.open { display: block; }

.totals-box {
    margin-top: 16px;
    text-align: right;
    font-size: 14px;
}

.totals-box .grand-total { font-weight: 800; font-size: 17px; margin-top: 4px; }

.stat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.stat-grid .stat-value { font-size: 26px; font-weight: 800; }

.segmented {
    display: inline-flex;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
}

.segmented-option {
    border: none;
    background: var(--color-surface);
    color: var(--color-text);
    padding: 7px 14px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    border-right: 1px solid var(--color-border);
}

.segmented-option:last-child { border-right: none; }

.segmented-option.active {
    background: var(--color-primary);
    color: #fff;
}