:root {
  --bg: #e8e1d4;
  --ink: #1c1915;
  --muted: #6f685e;
  --card: #fbf7f1;
  --line: #ddd3c4;
  --sidebar: #241f1b;
  --sidebar-text: #f4efe6;
  --accent: #9c3b1e;
  --accent-ink: #fff8f3;
  --ok: #1d6b43;
  --bad: #9f1239;
  --warn: #9a6700;
  --shadow: 0 16px 40px rgba(48, 32, 14, 0.08);
  --sans: "Segoe UI", sans-serif;
  --mono: Consolas, "Cascadia Mono", monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.45;
}

button, input, select, textarea { font: inherit; color: inherit; }

button, .link-button {
  border: 0;
  border-radius: 8px;
  padding: 10px 14px;
  background: var(--accent);
  color: var(--accent-ink);
  cursor: pointer;
}

button.ghost, a.ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
  text-decoration: none;
  display: inline-block;
}

button:disabled { opacity: 0.5; cursor: default; }

input, select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: white;
  border-radius: 8px;
  padding: 10px 12px;
}

textarea { min-height: 140px; resize: vertical; font-family: var(--mono); font-size: 13px; }

label { display: grid; gap: 6px; font-size: 13px; color: var(--muted); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

[hidden] { display: none !important; }

.login-view {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 20px;
}

.login-card { width: min(440px, 100%); display: grid; gap: 14px; }

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--accent);
  color: white;
  font-weight: 700;
}

h1, h2, p { margin: 0; }

h1 { font-size: 28px; letter-spacing: -0.03em; }

h2 { font-size: 18px; }

.lede { color: var(--muted); }

.form-grid, .stack { display: grid; gap: 12px; }

.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: end; }

.row > * { flex: 1; }

.shell { min-height: 100vh; display: grid; grid-template-columns: 230px 1fr; }

.side {
  background: var(--sidebar);
  color: var(--sidebar-text);
  padding: 22px 16px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.side .brand { display: flex; gap: 10px; align-items: center; }

.side strong { display: block; }

.side span { color: #cbbfae; font-size: 12px; }

.side nav { display: grid; gap: 4px; }

.side button, .side a {
  text-align: left;
  background: transparent;
  color: var(--sidebar-text);
  border-radius: 8px;
  text-decoration: none;
  padding: 10px 12px;
}

.side button.active, .side a:hover, .side button:hover { background: #3a322b; }

.main { padding: 22px 28px 40px; display: grid; gap: 16px; align-content: start; }

.top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.who { color: var(--muted); }

.notice {
  padding: 10px 12px;
  border-radius: 8px;
  background: #f3e7c8;
}

.notice.error { background: #f8d7df; color: var(--bad); }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }

.stat { display: grid; gap: 6px; }
.stat span { color: var(--muted); font-size: 13px; }
.stat strong { font-size: 28px; letter-spacing: -0.04em; }

.table-wrap { overflow-x: auto; }

table { width: 100%; border-collapse: collapse; }
.table-wrap table { min-width: 680px; }

th {
  text-align: left;
  font-size: 12px;
  color: var(--muted);
  font-weight: 600;
  padding: 8px 10px;
}

td { padding: 10px; border-top: 1px solid var(--line); vertical-align: top; }

code, .mono { font-family: var(--mono); }

.key-banner {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  background: #f4e2d6;
  border-radius: 12px;
  padding: 12px 14px;
}

.key-banner code { font-size: 18px; letter-spacing: 0.04em; }

.pill {
  display: inline-block;
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 12px;
  background: #ece5da;
}

.pill.ok { background: #d9f0e3; color: var(--ok); }
.pill.bad { background: #f8d7df; color: var(--bad); }
.pill.warn { background: #f8ebc8; color: var(--warn); }

.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.tool-page { max-width: 1100px; margin: 0 auto; padding: 22px; display: grid; gap: 16px; }

.tool-bar, .tool-grid { display: flex; justify-content: space-between; gap: 12px; align-items: center; }

.tool-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: start; }

.steps { display: grid; gap: 14px; }

.invoice { display: grid; gap: 8px; }

.invoice-total { font-size: 28px; letter-spacing: -0.04em; }

.muted { color: var(--muted); }

@media (max-width: 900px) {
  .shell, .tool-grid, .stats, .settings-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: 1fr 1fr; }
}