:root {
  --green: #2d6e3e;
  --green-dark: #1f5530;
  --green-light: #f0f7f2;
  --orange: #f37021;
  --text: #222;
  --muted: #666;
  --border: #ddd;
  --bg: #fafafa;
  --warn: #fff8e1;
  --warn-border: #f0c040;
  --error: #fdecea;
  --error-text: #c62828;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.5;
}
.container { max-width: 1100px; margin: 0 auto; padding: 0 16px; }

.topbar {
  background: white;
  border-bottom: 2px solid var(--green);
  padding: 12px 0;
}
.topbar .container { display: flex; align-items: center; justify-content: space-between; }
.brand {
  font-size: 18px; font-weight: 700; color: var(--green);
  text-decoration: none; display: flex; align-items: center; gap: 8px;
}
.brand-mark {
  width: 28px; height: 28px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  color: white; font-size: 13px; font-weight: bold;
}
.brand-mark.left { background: var(--green); }
.brand-mark.right { background: var(--orange); }
nav a { color: var(--text); text-decoration: none; margin-left: 16px; font-size: 14px; }
nav a:hover { color: var(--green); }

main { padding: 24px 0 60px; }

h1 { font-size: 24px; margin: 0 0 16px; color: var(--green-dark); }
h2 { font-size: 18px; margin: 24px 0 12px; color: var(--green-dark); }
h3 { font-size: 15px; margin: 16px 0 8px; }

.card {
  background: white;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 16px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
}
.card-title { margin-top: 0; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 12px; }
.stat {
  background: var(--green-light);
  border: 1px solid var(--green);
  border-radius: 6px;
  padding: 14px;
}
.stat .lbl { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.5px; }
.stat .val { font-size: 28px; font-weight: 700; color: var(--green-dark); }
.stat .sub { font-size: 12px; color: var(--muted); margin-top: 4px; }

.btn {
  display: inline-block;
  padding: 9px 16px;
  border-radius: 6px;
  border: 0;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  background: var(--green);
  color: white;
  transition: background 0.15s;
}
.btn:hover { background: var(--green-dark); }
.btn-orange { background: var(--orange); }
.btn-orange:hover { background: #d85a14; }
.btn-secondary { background: white; color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: #f0f0f0; }
.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-lg { padding: 12px 22px; font-size: 16px; }

.form-row { margin-bottom: 12px; }
.form-row label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; font-weight: 500; }
.form-row input[type=text], .form-row input[type=password], .form-row input[type=number],
.form-row select, .form-row textarea, .form-row input[type=file] {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  background: white;
}
.form-row input:focus, .form-row select:focus { outline: 0; border-color: var(--green); box-shadow: 0 0 0 3px rgba(45,110,62,0.1); }
.form-row.code-input input {
  font-family: "Courier New", monospace;
  font-size: 22px;
  letter-spacing: 6px;
  text-align: center;
  padding: 14px;
  text-transform: uppercase;
}

.row { display: flex; gap: 16px; flex-wrap: wrap; }
.col { flex: 1; min-width: 280px; }

.alert { padding: 10px 14px; border-radius: 6px; margin-bottom: 12px; font-size: 14px; }
.alert.error { background: var(--error); color: var(--error-text); border: 1px solid #f5c6c6; }
.alert.success { background: var(--green-light); color: var(--green-dark); border: 1px solid var(--green); }
.alert.warn { background: var(--warn); color: #8a6d3b; border: 1px solid var(--warn-border); }

table { width: 100%; border-collapse: collapse; font-size: 14px; }
table th, table td { padding: 8px 10px; text-align: left; border-bottom: 1px solid var(--border); }
table th { background: var(--green-light); color: var(--green-dark); font-weight: 600; font-size: 13px; }
table tbody tr:hover { background: #fafcfb; }

.muted { color: var(--muted); font-size: 13px; }
.right { text-align: right; }
.center { text-align: center; }
.spacer { height: 16px; }

.footer { padding: 16px 0; color: var(--muted); border-top: 1px solid var(--border); margin-top: 40px; background: white; }

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

.code-cell { font-family: "Courier New", monospace; font-weight: bold; letter-spacing: 1px; }

.hero {
  text-align: center;
  padding: 40px 20px;
}
.hero h1 { font-size: 32px; margin-bottom: 8px; }
.hero p { color: var(--muted); margin: 0 0 24px; }