:root {
    --ink: #1d2330; --muted: #5a6272; --bg: #f6f4ef; --card: #ffffff; --line: #d9d4c8;
    --brand: #1f5f4a; --brand-dark: #164636; --danger: #a12a2a; --ok: #1f6b3a;
    font-size: 19px;
}
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; color: var(--ink); background: var(--bg); line-height: 1.5; }
main { max-width: 1000px; margin: 0 auto; padding: 1.5rem 1rem 4rem; }
h1 { font-size: 1.8rem; margin: .25rem 0 1rem; }
h2 { font-size: 1.35rem; margin: .25rem 0 .75rem; }
.topbar { display: flex; flex-wrap: wrap; gap: .5rem 1.5rem; align-items: center; padding: .75rem 1rem; background: var(--brand); color: #fff; }
.topbar a { color: #fff; text-decoration: none; font-weight: 600; }
.topbar nav { display: flex; flex-wrap: wrap; gap: 1rem; flex: 1; }
.topbar form { margin: 0; }
.nav-wrap { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem 1.5rem; flex: 1; }
.menu-toggle { display: none; margin-left: auto; font: inherit; font-weight: 700; color: #fff; background: transparent; border: 2px solid #fff; border-radius: 8px; padding: .45rem .9rem; cursor: pointer; }
@media (max-width: 700px) {
    .topbar { justify-content: space-between; }
    .js-menu .menu-toggle { display: inline-block; }
    .js-menu .nav-wrap { display: none; }
    .js-menu.open .nav-wrap { display: flex; }
    .nav-wrap { flex-basis: 100%; flex-direction: column; align-items: stretch; gap: 0; padding-top: .5rem; }
    .topbar nav { flex-direction: column; gap: 0; }
    .topbar nav a { padding: .8rem .25rem; border-top: 1px solid rgba(255, 255, 255, .25); font-size: 1.15rem; }
    .nav-wrap form { border-top: 1px solid rgba(255, 255, 255, .25); padding-top: .75rem; }
    .nav-wrap form .btn { width: 100%; }
}
.brand { font-size: 1.2rem; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 1.25rem; margin-bottom: 1.25rem; }
.narrow { max-width: 460px; margin: 3rem auto; }
.btn { display: inline-block; background: var(--brand); color: #fff; border: 2px solid var(--brand); border-radius: 8px; padding: .55rem 1.1rem; font: inherit; font-weight: 600; text-decoration: none; cursor: pointer; }
.btn:hover { background: var(--brand-dark); border-color: var(--brand-dark); }
.btn:disabled { opacity: .6; cursor: wait; }
.btn-secondary { background: #fff; color: var(--brand); }
.btn-secondary:hover { background: #eef5f2; color: var(--brand-dark); }
.btn-danger { background: var(--danger); border-color: var(--danger); }
.btn-plain { background: transparent; color: inherit; border-color: currentColor; }
.btn-plain:hover { background: rgba(0, 0, 0, .06); border-color: currentColor; }
.btn-big { font-size: 1.1rem; padding: .8rem 1.4rem; }
.btn-small { font-size: .85rem; padding: .3rem .7rem; }
.btn-huge { font-size: 1.4rem; padding: 1.6rem 1rem; text-align: center; border-radius: 12px; }
.big-buttons { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
label { display: block; font-weight: 600; margin: .75rem 0 .25rem; }
input, select, textarea { font: inherit; width: 100%; padding: .55rem .7rem; border: 2px solid var(--line); border-radius: 8px; background: #fff; color: var(--ink); }
input:focus, select:focus, textarea:focus { outline: 3px solid #9fd3bf; border-color: var(--brand); }
.hint { font-weight: 400; color: var(--muted); font-size: .85rem; }
.field-error { color: var(--danger); font-weight: 600; margin: .25rem 0 0; font-size: .9rem; }
.flash { padding: .8rem 1rem; border-radius: 8px; margin-bottom: 1rem; font-weight: 600; }
.flash-success { background: #e7f4ec; border: 2px solid var(--ok); color: var(--ok); }
.flash-error, .error-box { background: #fbeaea; border: 2px solid var(--danger); color: var(--danger); }
.error-box { padding: .8rem 1rem; border-radius: 8px; }
.table-wrap { overflow-x: auto; }
table.list { width: 100%; border-collapse: collapse; background: #fff; }
table.list th, table.list td { padding: .6rem; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
table.list a:not(.btn) { color: var(--brand); font-weight: 600; }
.num { text-align: right; white-space: nowrap; }
.badge { display: inline-block; padding: .1rem .6rem; border-radius: 999px; font-size: .85rem; font-weight: 700; vertical-align: middle; }
.badge-draft { background: #eceae4; color: #555; }
.badge-unpaid { background: #e5eef9; color: #1e4f8a; }
.badge-overdue { background: #fbeaea; color: var(--danger); }
.badge-paid { background: #e7f4ec; color: var(--ok); }
.badge-cancelled { background: #eee; color: #777; text-decoration: line-through; }
.page-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 1rem; }
.tabs { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: 1rem; }
.tabs a { padding: .35rem .9rem; border-radius: 999px; border: 2px solid var(--line); text-decoration: none; color: var(--ink); background: #fff; }
.tabs a.active { background: var(--brand); border-color: var(--brand); color: #fff; }
.actions { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; }
.actions form { display: inline; margin: 0; }
.row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 0 1rem; }
.lines-table { width: 100%; border-collapse: collapse; }
.lines-table th { text-align: left; font-size: .9rem; padding: .3rem; }
.lines-table td { padding: .3rem; vertical-align: top; }
.total-line { font-size: 1.4rem; font-weight: 700; text-align: right; margin: 1rem 0; }
.pdf-frame { width: 100%; height: 80vh; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
dialog { border: 0; border-radius: 12px; padding: 1.5rem; max-width: 440px; box-shadow: 0 10px 40px rgba(0, 0, 0, .3); }
dialog::backdrop { background: rgba(0, 0, 0, .45); }
dialog p { font-size: 1.15rem; margin-top: 0; }
fieldset { border: 1px solid var(--line); border-radius: 10px; padding: 1rem 1.25rem; margin: 0 0 1.25rem; background: #fff; }
legend { font-weight: 700; padding: 0 .4rem; font-size: 1.1rem; }
.checkbox { display: flex; gap: .6rem; align-items: center; }
.checkbox input { width: auto; transform: scale(1.4); }
[hidden] { display: none !important; }