:root {
  --ocean: #0E5B82;
  --ocean-dk: #0A4763;
  --band: #EAF3F8;
  --ink: #1f2a30;
  --gray: #4D4D4D;
  --gray-lt: #7A7A7A;
  --line: #e3e8ec;
  --bg: #f4f7f9;
  --card: #ffffff;
  --ok-bg: #e7f5ec; --ok-fg: #1c6b3a;
  --bad-bg: #fdecea; --bad-fg: #a3271a;
  --radius: 12px;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 14px; line-height: 1.5;
}
a { color: var(--ocean); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2 { color: var(--ocean-dk); }
h2 { font-size: 16px; margin: 0 0 12px; }

/* Topbar */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--ocean); color: #fff; padding: 12px 22px;
}
.topbar a { color: #fff; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.brand:hover { text-decoration: none; }
.brand-text em { font-style: normal; opacity: .8; font-weight: 400; }
.mark {
  width: 30px; height: 30px; display: grid; place-items: center;
  background: #fff; color: var(--ocean); font-weight: 800; border-radius: 7px; font-style: italic;
}
.topbar nav { display: flex; align-items: center; gap: 18px; }
.topbar nav a { opacity: .85; font-size: 14px; }
.topbar nav a:hover, .topbar nav a.active { opacity: 1; text-decoration: none; border-bottom: 2px solid #fff; padding-bottom: 2px; }

.wrap { max-width: 1000px; margin: 24px auto; padding: 0 20px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 780px) { .grid-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; margin-bottom: 18px;
}
.head-row { display: flex; align-items: center; justify-content: space-between; }
.inv-no { color: var(--ocean); font-weight: 700; font-size: 18px; }

/* Forms */
.form label, .login-card label { display: block; font-size: 13px; color: var(--gray); margin-bottom: 12px; }
input, textarea, select {
  width: 100%; margin-top: 4px; padding: 9px 10px; font-size: 14px;
  border: 1px solid #cfd8dd; border-radius: 8px; background: #fff; color: var(--ink);
}
input:focus, textarea:focus, select:focus { outline: 2px solid var(--band); border-color: var(--ocean); }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row label { flex: 1; min-width: 120px; }
textarea { resize: vertical; }

.btn {
  display: inline-block; padding: 9px 16px; border-radius: 8px; border: 1px solid var(--ocean);
  background: #fff; color: var(--ocean); font-weight: 600; font-size: 14px; cursor: pointer;
}
.btn:hover { background: var(--band); text-decoration: none; }
.btn.primary { background: var(--ocean); color: #fff; }
.btn.primary:hover { background: var(--ocean-dk); }
.btn.small { padding: 5px 11px; font-size: 12.5px; }
.btn.block { width: 100%; }
.actions { display: flex; gap: 12px; margin-top: 12px; flex-wrap: wrap; }
.link { background: none; border: none; color: var(--ocean); cursor: pointer; font-size: 13px; padding: 0; }
.link.danger { color: #a3271a; }
.inline { display: inline; }

/* Tables */
.tbl { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.tbl th { text-align: left; color: var(--gray-lt); font-weight: 600; font-size: 12px; padding: 7px 8px; border-bottom: 1px solid var(--line); }
.tbl td { padding: 9px 8px; border-bottom: 1px solid #f0f3f5; vertical-align: middle; }
.tbl .r, th.r, td.r { text-align: right; }
.tbl .notes { color: var(--gray); max-width: 280px; }
.lineitems input { margin: 0; padding: 6px 7px; font-size: 13px; }
.w-date { width: 130px; } .w-qty, .w-rate { width: 72px; text-align: right; }
.total-line { text-align: right; font-size: 15px; margin: 12px 4px 0; }

.kv { border-collapse: collapse; }
.kv th { text-align: left; color: var(--gray-lt); font-weight: 600; padding: 5px 18px 5px 0; }
.kv td { padding: 5px 0; }

.email-box { border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; margin: 8px 0; background: #fbfdfe; }
.email-box legend { color: var(--ocean-dk); font-weight: 600; padding: 0 6px; }

.tag { font-size: 11px; padding: 2px 8px; border-radius: 20px; background: #eef2f4; color: var(--gray); }
.tag.billed, .tag.open, .tag.closed { text-transform: lowercase; }
.tag.billed { background: var(--ok-bg); color: var(--ok-fg); }
.tag.closed { background: #eee; color: #777; }
.tag.open { background: var(--band); color: var(--ocean); }

.muted { color: var(--gray-lt); }
.small { font-size: 12px; }

.flash { padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 13.5px; }
.flash.ok { background: var(--ok-bg); color: var(--ok-fg); }
.flash.bad { background: var(--bad-bg); color: var(--bad-fg); }

/* Login */
.login-card { max-width: 340px; margin: 8vh auto; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 32px; text-align: center; }
.login-card h1 { margin: 6px 0 0; }
.login-card .sub { color: var(--gray-lt); margin: 0 0 18px; }
.login-card form { text-align: left; }
.login-mark { width: 52px; height: 52px; margin: 0 auto; background: var(--ocean); color: #fff; display: grid; place-items: center; font-weight: 800; font-style: italic; font-size: 26px; border-radius: 12px; }