:root {
  --ink: #16232E;
  --ink-soft: #3A4A56;
  --paper: #EEF1EF;
  --card: #FFFFFF;
  --line: #D7DCDC;
  --amber: #D9922E;
  --green: #3F7D5C;
  --red: #B24C3B;
  --slate: #5C6B6B;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: 'IBM Plex Sans', sans-serif;
}

a { color: inherit; }

.container { max-width: 1000px; margin: 0 auto; padding: 24px 20px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 20px;
}

.field { display: block; margin-bottom: 14px; }
.field-label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--slate);
  margin-bottom: 6px;
}

input, select, textarea {
  width: 100%;
  box-sizing: border-box;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-family: 'IBM Plex Sans', sans-serif;
  font-size: 14px;
  color: var(--ink);
  background: var(--card);
  outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--ink); }

button { font-family: 'IBM Plex Sans', sans-serif; cursor: pointer; }

.btn {
  padding: 9px 16px;
  border-radius: 6px;
  font-size: 13.5px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #fff;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn-approve { background: var(--green); border-color: var(--green); color: #fff; }
.btn-reject { background: transparent; color: var(--red); border: 1px solid var(--red); }

.stamp {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-radius: 3px;
  padding: 3px 8px;
  transform: rotate(-1.5deg);
  white-space: nowrap;
}
.stamp-pending_payment { color: var(--red); border: 1.5px dashed var(--red); }
.stamp-pending { color: var(--amber); border: 1.5px solid var(--amber); }
.stamp-approved { color: var(--green); border: 1.5px solid var(--green); }
.stamp-rejected { color: var(--red); border: 1.5px solid var(--red); }
.stamp-cancelled { color: var(--slate); border: 1.5px solid var(--slate); }

.demo-banner {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--amber);
  border: 1px dashed var(--amber);
  border-radius: 6px;
  padding: 6px 10px;
  margin-bottom: 14px;
  display: inline-block;
}

.payment-box {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  margin-top: 14px;
  background: var(--paper);
}

.fee-tag {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12.5px;
  color: var(--ink-soft);
}

.topbar {
  background: var(--ink);
  color: #fff;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.topbar-brand { display: flex; align-items: center; gap: 8px; font-family: 'IBM Plex Mono', monospace; font-size: 12px; letter-spacing: 0.15em; text-transform: uppercase; }

.tabs { display: flex; gap: 6px; margin-bottom: 22px; flex-wrap: wrap; }
.tab {
  padding: 8px 14px;
  border-radius: 20px;
  cursor: pointer;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  display: inline-block;
}
.tab.active { border-color: var(--ink); background: var(--ink); color: #fff; }

.error-text { color: var(--red); font-size: 12.5px; margin-bottom: 12px; }
.success-text { color: var(--green); font-size: 13px; margin-bottom: 12px; }

h1, h2, h3 { font-family: 'Newsreader', serif; font-style: italic; color: var(--ink); }

.mono { font-family: 'IBM Plex Mono', monospace; }
.muted { color: var(--slate); }

.grid-cards { display: grid; gap: 12px; }

.auth-shell {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.stat-row { display: flex; gap: 18px; margin-bottom: 14px; flex-wrap: wrap; }
.stat-value { font-family: 'Newsreader', serif; font-style: italic; font-size: 28px; }
.stat-label { font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--slate); }

.bar-chart { display: flex; flex-direction: column; gap: 10px; }
.bar-row { display: flex; align-items: center; gap: 10px; font-size: 12.5px; }
.bar-row .bar-label { width: 130px; flex-shrink: 0; color: var(--ink-soft); }
.bar-track { flex: 1; background: var(--paper); border-radius: 4px; height: 18px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--ink); border-radius: 4px; }
.bar-row .bar-count { width: 30px; text-align: right; font-family: 'IBM Plex Mono', monospace; }