:root {
  --ink: #17211c;
  --muted: #5d6b64;
  --line: #d7e0da;
  --paper: #f3f6f4;
  --card: #ffffff;
  --green: #14624a;
  --green-dark: #0e4333;
  --amber: #8a5a10;
  --amber-bg: #fff4df;
  --ready: #e7f6ef;
  --danger: #8d2f2f;
  --shadow: 0 16px 40px rgba(18, 33, 28, 0.08);
  font-family: "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
}

button, input, textarea {
  font: inherit;
}

button { cursor: pointer; }

a { color: var(--green); }

#app { min-height: 100vh; }

.auth-shell, .customer-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 16px;
}

.card {
  width: min(440px, 100%);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 18px;
}

.mark {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--green-dark);
  color: #f4fbf7;
  display: grid;
  place-items: center;
  font-weight: 700;
}

.brand h1, .top h1, .customer-card h1 {
  margin: 0;
  font-size: 1.35rem;
}

.lede, .hint {
  color: var(--muted);
  line-height: 1.45;
}

label {
  display: block;
  margin: 14px 0 6px;
  font-size: 0.92rem;
}

input, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 12px;
  background: #fff;
  color: var(--ink);
}

textarea { min-height: 76px; resize: vertical; }

.primary, .ghost, .danger {
  border-radius: 999px;
  padding: 11px 16px;
  border: 1px solid transparent;
}

.primary {
  background: var(--green);
  color: white;
}

.primary:hover { background: var(--green-dark); }

.ghost, .danger {
  background: white;
  border-color: var(--line);
  color: var(--ink);
}

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

.stack { display: grid; gap: 10px; }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }

.error {
  background: #fdecec;
  color: var(--danger);
  border-radius: 10px;
  padding: 10px 12px;
  margin-top: 12px;
}

.shell { min-height: 100vh; display: grid; grid-template-columns: 240px 1fr; }

.side {
  background: #12352c;
  color: #e7f3ed;
  padding: 22px 18px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.side .mark { background: #f2b134; color: #12352c; }
.side p { margin: 0; color: #c5ddd2; line-height: 1.4; }
.side button { margin-top: auto; }

.main { padding: 28px; }

.top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-end;
  margin-bottom: 18px;
}

.tabs { display: flex; gap: 8px; margin-bottom: 16px; }
.tabs button[aria-pressed="true"] { background: var(--green); color: white; border-color: var(--green); }

.list { display: grid; gap: 12px; }

.session {
  background: white;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px 18px;
  display: grid;
  grid-template-columns: 180px 1fr auto;
  gap: 16px;
  align-items: center;
}

.code {
  font-variant-numeric: tabular-nums;
  font-size: 1.55rem;
  letter-spacing: 0.04em;
  margin: 0;
}

.badge {
  display: inline-flex;
  border-radius: 999px;
  padding: 3px 8px;
  font-size: 0.78rem;
  background: var(--amber-bg);
  color: var(--amber);
}

.badge.ready { background: var(--ready); color: var(--green-dark); }
.badge.closed, .badge.expired { background: #eef1ef; color: var(--muted); }

.meta { color: var(--muted); margin: 4px 0 0; font-size: 0.92rem; }

.empty {
  border: 1px dashed var(--line);
  border-radius: 16px;
  padding: 28px;
  background: white;
}

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(18, 33, 28, 0.46);
  display: grid;
  place-items: center;
  padding: 18px;
}

.overlay .card { width: min(520px, 100%); }

.big-code {
  font-size: 2.4rem;
  letter-spacing: 0.06em;
  text-align: center;
  margin: 8px 0 4px;
  font-variant-numeric: tabular-nums;
}

.customer-card { width: min(640px, 100%); }
.steps { margin: 0 0 8px; padding-left: 18px; }
.steps li { margin: 8px 0; line-height: 1.4; }
.trust {
  background: var(--ready);
  border-radius: 12px;
  padding: 12px;
  color: var(--green-dark);
}

.settings { margin-top: 22px; }
.settings summary { cursor: pointer; color: var(--muted); }

@media (max-width: 860px) {
  .shell { grid-template-columns: 1fr; }
  .side { min-height: auto; }
  .side button { margin-top: 12px; }
  .session { grid-template-columns: 1fr; }
  .main { padding: 18px; }
}