:root {
  --navy: #102d46;
  --blue: #1677a6;
  --light: #f3f7fa;
  --border: #d7e1e8;
  --text: #263845;
  --danger: #9b2c2c;
  --success: #1e6b47;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--text);
  background: linear-gradient(135deg, #edf5f9 0%, #ffffff 60%, #e5f0f6 100%);
}

.admin-header {
  background: var(--navy);
  color: #fff;
  padding: 18px 24px;
}

.admin-header-inner,
.admin-container {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
}

.admin-header-inner {
  display: flex;
  align-items: center;
  gap: 22px;
}

.admin-brand { color: #fff; text-decoration: none; font-weight: 700; }
.admin-label { font-size: 13px; letter-spacing: .08em; text-transform: uppercase; opacity: .8; }
.admin-area-name { flex: 0 0 auto; font-weight: 700; letter-spacing: .04em; }
.admin-main-nav { display: flex; align-items: center; gap: 5px; margin-right: auto; }
.admin-main-nav a { display: inline-flex; align-items: center; min-height: 38px; padding: 8px 12px; border-radius: 5px; color: rgba(255,255,255,.82); text-decoration: none; font-size: 14px; font-weight: 700; }
.admin-main-nav a:hover,
.admin-main-nav a:focus,
.admin-main-nav a.is-active { background: rgba(255,255,255,.14); color: #fff; }
.admin-container { padding: 48px 0; }
.login-container { width: min(520px, calc(100% - 32px)); }

.admin-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 18px 55px rgba(16, 45, 70, .12);
  padding: 32px;
}

.admin-card h1 { margin: 0 0 12px; color: var(--navy); font-size: 30px; }
.admin-card p { line-height: 1.6; }
.admin-kicker { margin: 0 0 10px; color: var(--blue); font-size: 13px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; }

.admin-form { display: grid; gap: 18px; margin-top: 26px; }
.admin-field { display: grid; gap: 7px; }
.admin-field label { font-weight: 700; color: var(--navy); }
.admin-field input {
  width: 100%;
  border: 1px solid #b9c9d4;
  border-radius: 6px;
  padding: 13px 14px;
  font: inherit;
}
.admin-field input:focus { outline: 3px solid rgba(22, 119, 166, .18); border-color: var(--blue); }

.admin-button,
.admin-link-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 0;
  border-radius: 6px;
  padding: 11px 18px;
  background: var(--blue);
  color: #fff;
  text-decoration: none;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.admin-button:hover,
.admin-link-button:hover { background: #0f6088; }
.admin-button-secondary { background: #526a7a; }
.admin-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }

.admin-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 18px; margin-top: 24px; }
.admin-tile { border: 1px solid var(--border); border-radius: 9px; padding: 22px; background: var(--light); }
.admin-tile h2 { margin: 0 0 10px; color: var(--navy); font-size: 21px; }
.admin-alert { border-radius: 6px; padding: 12px 14px; margin: 18px 0 0; }
.admin-alert-error { background: #fff0f0; color: var(--danger); border: 1px solid #efc5c5; }
.admin-alert-success { background: #edf9f3; color: var(--success); border: 1px solid #bfe2cf; }
.admin-note { color: #607482; font-size: 14px; }
.logout-form { margin: 0; }
.logout-form button { border: 1px solid rgba(255,255,255,.5); background: transparent; color: #fff; border-radius: 4px; padding: 7px 12px; cursor: pointer; }

.payments-page { width: min(1180px, calc(100% - 32px)); }
.payment-groups { display: grid; gap: 16px; margin: 28px 0; }
.payment-group-card { border: 1px solid var(--border); border-radius: 12px; padding: 22px; background: #f7fafc; }
.payment-group-active { border-left: 5px solid #1677a6; }
.payment-group-emeriti { border-left: 5px solid #7355a3; background: #faf8fd; }
.payment-group-heading { display: flex; justify-content: space-between; align-items: center; gap: 20px; }
.payment-group-heading > div { display: flex; align-items: baseline; flex-wrap: wrap; gap: 10px 16px; }
.payment-group-heading span { color: var(--navy); font-size: 19px; font-weight: 700; }
.payment-group-heading strong { color: var(--navy); font-size: 42px; line-height: 1; }
.payment-group-heading .payment-percentage { color: #18754b; font-size: 25px; }
.payment-group-metrics { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 18px; }
.payment-metric { display: flex; align-items: center; justify-content: space-between; gap: 14px; border-radius: 8px; padding: 13px 15px; }
.payment-metric span { font-size: 14px; font-weight: 700; }
.payment-metric strong { font-size: 27px; }
.payment-metric-paid { background: #e8f7ef; color: #176942; }
.payment-metric-due { background: #fff0ef; color: #a4342b; }
.payment-progress { height: 13px; overflow: hidden; border-radius: 999px; background: #e1e8ed; margin-top: 15px; }
.payment-progress span { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, #1a8a59, #49b77f); }
.payment-progress-small { height: 8px; margin-top: 17px; }
.payments-section-title { color: var(--navy); margin: 34px 0 16px; font-size: 23px; }
.payments-years-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 14px; }
.payment-year-card { border: 1px solid var(--border); border-radius: 9px; padding: 18px; background: #fff; }
.payment-year-card.is-current { border: 2px solid #1677a6; background: #f5fbfe; }
.payment-year-title { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.payment-year-title h3 { margin: 0; color: var(--navy); font-size: 25px; }
.payment-year-groups { display: grid; gap: 14px; margin-top: 15px; }
.payment-year-group { border-top: 1px solid #e1e8ed; padding-top: 12px; }
.payment-year-group-title { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.payment-year-group-title h4 { margin: 0; color: var(--navy); font-size: 15px; }
.payment-year-group-title strong { color: #18754b; font-size: 14px; }
.payment-year-card dl { margin: 7px 0 0; }
.payment-year-card dl div { display: flex; justify-content: space-between; gap: 12px; padding: 5px 0; }
.payment-year-card dt { font-size: 12px; line-height: 1.35; }
.payment-year-card dd { margin: 0; font-weight: 700; color: var(--navy); }
.payments-footer-note { margin-top: 26px; padding-top: 20px; border-top: 1px solid var(--border); color: #607482; font-size: 14px; }

@media (max-width: 600px) {
  .admin-header-inner { align-items: stretch; flex-wrap: wrap; gap: 10px; }
  .admin-area-name { width: 100%; }
  .admin-main-nav { order: 3; width: 100%; overflow-x: auto; }
  .admin-main-nav a { white-space: nowrap; }
  .logout-form { margin-left: auto; }
  .admin-container { padding: 28px 0; }
  .admin-card { padding: 24px 20px; }
  .payment-group-card { padding: 18px; }
  .payment-group-heading strong { font-size: 36px; }
  .payment-group-metrics { grid-template-columns: 1fr; }
}