:root {
  --bg: #f6f8f7;
  --panel: #ffffff;
  --ink: #16241c;
  --muted: #5c6b62;
  --line: #e3e9e5;
  --brand: #16a34a;
  --brand-dark: #128a3e;
  --brand-soft: #e8f6ee;
  --danger: #dc2626;
  --warn-bg: #fef3c7;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(22, 36, 28, 0.05), 0 8px 24px -16px rgba(22, 36, 28, 0.25);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  font-size: 15.5px;
}

.container { max-width: 920px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 60px; }
.brand { font-weight: 700; font-size: 18px; color: var(--ink); text-decoration: none; }
.brand span { color: var(--brand); }
.nav nav { display: flex; align-items: center; gap: 16px; }
.nav nav a { color: var(--muted); text-decoration: none; font-weight: 500; }
.nav nav a:hover { color: var(--ink); }
.who {
  color: var(--muted);
  font-size: 13.5px;
  background: var(--brand-soft);
  border: 1px solid #cfe8d9;
  padding: 3px 10px;
  border-radius: 999px;
}

main.container { padding-top: 28px; padding-bottom: 48px; min-height: calc(100vh - 160px); }

footer.container { padding-bottom: 32px; color: var(--muted); font-size: 13px; }

/* Hero */
.hero { text-align: center; padding: 48px 0 28px; }
.hero h1 { font-size: 38px; margin: 0 0 10px; letter-spacing: -0.5px; }
.hero p { color: var(--muted); font-size: 17px; margin: 0 auto; max-width: 560px; }

/* Buttons */
.btn {
  display: inline-block;
  background: var(--brand);
  color: #fff !important;
  border: 1px solid var(--brand);
  border-radius: 8px;
  padding: 8px 16px;
  font-size: 14.5px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
}
.btn:hover { background: var(--brand-dark); }
.btn.ghost { background: transparent; color: var(--muted) !important; border-color: var(--line); font-weight: 500; }
.btn.ghost:hover { color: var(--ink) !important; border-color: var(--muted); }
.btn.danger { background: transparent; color: var(--danger) !important; border-color: #f3c3c3; }
.btn.danger:hover { background: #fdf1f1; }
.btn.small { padding: 5px 10px; font-size: 13px; }

/* Panels / cards */
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: var(--shadow);
  margin-bottom: 22px;
}
.panel h2 { margin: 0 0 14px; font-size: 17px; }
.muted { color: var(--muted); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 14px; }
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  text-decoration: none;
  color: var(--ink);
  display: block;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.card .icon { font-size: 24px; }
.card h3 { margin: 10px 0 4px; font-size: 15.5px; }
.card p { margin: 0; color: var(--muted); font-size: 13.5px; }

/* Forms */
label { display: block; font-weight: 600; font-size: 13.5px; margin: 14px 0 5px; }
input[type=text], input[type=email], input[type=password], input[type=number],
input[type=datetime-local], select, textarea {
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
  background: #fff;
  color: var(--ink);
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--brand-soft); border-color: var(--brand); }
select[multiple] { min-height: 96px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 16px; }
.form-actions { margin-top: 18px; display: flex; gap: 10px; align-items: center; }
.hint { color: var(--muted); font-size: 12.5px; margin: 4px 0 0; }

/* Table */
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th { text-align: left; color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.4px; padding: 8px 10px; border-bottom: 1px solid var(--line); }
td { padding: 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
code.link { font-size: 12px; word-break: break-all; background: var(--brand-soft); padding: 2px 6px; border-radius: 5px; }

.badge { display: inline-block; font-size: 11.5px; font-weight: 700; padding: 2px 9px; border-radius: 999px; text-transform: uppercase; letter-spacing: 0.4px; }
.badge.active { background: var(--brand-soft); color: var(--brand-dark); }
.badge.revoked { background: #fdecec; color: var(--danger); }
.badge.expired, .badge.exhausted, .badge.invalid { background: #eef0ee; color: var(--muted); }

.row-actions { display: flex; gap: 6px; flex-wrap: wrap; align-items: center; }
.send-form { display: flex; gap: 6px; }
.send-form input { width: 180px; padding: 5px 8px; font-size: 13px; }

/* Flash */
.flash { padding: 11px 15px; border-radius: 8px; margin-bottom: 14px; font-size: 14px; }
.flash.success { background: var(--brand-soft); border: 1px solid #c2e5cf; color: #14532d; }
.flash.error { background: #fdecec; border: 1px solid #f3c3c3; color: #7f1d1d; }

/* Error page */
.big-message { text-align: center; padding: 56px 0; }
.big-message .icon { font-size: 44px; }
.big-message h1 { font-size: 24px; margin: 14px 0 8px; }
.big-message p { color: var(--muted); max-width: 480px; margin: 0 auto 22px; }

.center-card { max-width: 460px; margin: 32px auto; }

@media (max-width: 640px) {
  .form-row { grid-template-columns: 1fr; }
  .hero h1 { font-size: 29px; }
  .nav nav { gap: 10px; }
}