:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --ink: #172033;
  --muted: #697386;
  --line: #e3e8ef;
  --blue: #273b78;
  --red: #b8242f;
  --green: #16734a;
  --gold: #c9952f;
  --shadow: 0 16px 40px rgba(23, 32, 51, .08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
}

a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }

.top {
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.brand-row {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 18px 0 14px;
  display: grid;
  align-items: center;
  justify-items: center;
  gap: 12px;
}

.brand {
  display: flex;
  justify-content: center;
  width: 100%;
}

.brand img {
  display: block;
  width: min(300px, 42vw);
  height: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fafbfc;
  white-space: nowrap;
}

.nav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 9px 14px;
  border-radius: 6px;
  color: var(--muted);
  font-weight: 750;
}

.nav a.active {
  color: #fff;
  background: var(--blue);
}

.hero-mini {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 26px 0 30px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 22px;
  align-items: end;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--red);
  font-size: 13px;
  font-weight: 850;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }

h1 {
  margin-bottom: 10px;
  font-size: clamp(30px, 4vw, 54px);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-mini p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.6;
}

.price-box {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fafbfc;
}

.price-box span,
.price-box small {
  display: block;
  color: var(--muted);
}

.price-box strong {
  display: block;
  margin: 4px 0;
  color: var(--red);
  font-size: 30px;
  line-height: 1.12;
}

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 26px auto 54px;
}

.page-head,
.admin-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  gap: 22px;
  align-items: center;
  margin-bottom: 18px;
}

.page-head.compact,
.admin-head {
  grid-template-columns: minmax(0, 1fr) auto;
}

.page-head h2,
.admin-head h2 {
  margin-bottom: 8px;
  font-size: clamp(26px, 3vw, 36px);
  line-height: 1.2;
}

.page-head p,
.admin-head p,
.section-title p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.55;
}

.page-head img {
  width: 100%;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.panel,
.login-card,
.info-grid article,
.stat-grid article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  box-shadow: var(--shadow);
}

.panel { padding: 22px; }

.alert {
  margin-bottom: 18px;
  padding: 13px 15px;
  border: 1px solid rgba(22, 115, 74, .18);
  border-radius: 8px;
  color: #0d5e3a;
  background: #ecf9f2;
  font-weight: 750;
}

.alert.danger {
  border-color: rgba(184, 36, 47, .18);
  color: var(--red);
  background: #fff0f2;
}

.alert ul {
  margin: 8px 0 0;
  padding-left: 20px;
  line-height: 1.55;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.compact-grid { gap: 10px; }

.field {
  display: grid;
  gap: 6px;
}

.field span {
  color: #34405a;
  font-size: 14px;
  font-weight: 800;
}

.span-2 { grid-column: 1 / -1; }

input, select, textarea {
  width: 100%;
  min-height: 44px;
  padding: 11px 12px;
  border: 1px solid #ccd5e2;
  border-radius: 8px;
  color: var(--ink);
  background: #fff;
  outline: none;
}

textarea {
  min-height: 84px;
  resize: vertical;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(39, 59, 120, .12);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 14px;
  border: 0;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 850;
}

.btn.primary { color: #fff; background: var(--blue); }
.btn.ghost { color: var(--blue); background: #eef2fb; }
.btn.danger { color: #fff; background: var(--red); }
.btn.full { width: 100%; }
.btn.tiny { min-height: 34px; padding: 7px 10px; font-size: 13px; }

.info-grid,
.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.info-grid article,
.stat-grid article {
  padding: 18px;
}

.info-grid b,
.stat-grid span {
  display: block;
  color: var(--muted);
  font-size: 14px;
}

.info-grid strong,
.stat-grid strong {
  display: block;
  margin: 6px 0;
  font-size: 28px;
}

.info-grid span { color: var(--muted); line-height: 1.5; }

.split {
  display: grid;
  grid-template-columns: minmax(280px, .48fr) minmax(0, .72fr);
  gap: 18px;
  align-items: start;
}

.search {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  margin-bottom: 14px;
}

.list,
.admin-list,
.installment-list,
.payment-review {
  display: grid;
  gap: 10px;
}

.student-item,
.installment-list article,
.review-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
}

.student-item.selected {
  border-color: rgba(39, 59, 120, .35);
  background: #f3f6fd;
}

.student-item b,
.student-item small,
.installment-list b,
.installment-list span,
.review-row b,
.review-row span {
  display: block;
}

.student-item small,
.installment-list span,
.review-row span {
  color: var(--muted);
  font-size: 13px;
}

.pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 92px;
  padding: 6px 9px;
  border-radius: 999px;
  font-size: 13px;
  font-style: normal;
  font-weight: 850;
}

.pill.none { color: #596579; background: #edf1f6; }
.pill.partial { color: #8b5a00; background: #fff3d8; }
.pill.done { color: var(--green); background: #e8f7ef; }

.upload-form {
  display: grid;
  gap: 14px;
  margin: 16px 0 18px;
}

.bank-card {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  margin-bottom: 16px;
  padding: 16px;
  border: 1px solid rgba(39, 59, 120, .14);
  border-radius: 8px;
  background: #f6f8fe;
}

.bank-card img {
  width: 112px;
  height: 76px;
  object-fit: cover;
  border-radius: 8px;
}

.bank-card span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  font-weight: 850;
}

.bank-card strong {
  display: block;
  margin: 4px 0 8px;
  color: var(--blue);
  font-size: 30px;
  line-height: 1.1;
}

.bank-card p {
  margin: 4px 0 0;
  color: var(--ink);
  line-height: 1.45;
}

.bank-card small {
  display: block;
  margin-top: 10px;
  color: var(--red);
  font-weight: 850;
  line-height: 1.45;
}

.empty {
  padding: 22px;
  border: 1px dashed #cbd4df;
  border-radius: 8px;
  color: var(--muted);
  text-align: center;
  background: #fbfcfe;
}

.login-card {
  width: min(440px, 100%);
  margin: 20px auto;
  padding: 24px;
}

.login-card img {
  display: block;
  width: min(300px, 100%);
  margin: 0 auto 18px;
}

.login-card h2 {
  margin-bottom: 8px;
}

.login-card p {
  color: var(--muted);
  line-height: 1.55;
}

.section-title {
  margin-bottom: 16px;
}

.admin-card {
  display: grid;
  gap: 16px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfe;
}

.review-row {
  flex-wrap: wrap;
  background: #fff;
}

.review-row form { margin: 0; }

@media (max-width: 860px) {
  .brand-row,
  .hero-mini,
  .page-head,
  .admin-head,
  .split {
    grid-template-columns: 1fr;
  }

  .brand-row {
    display: grid;
  }

  .brand img { width: min(300px, 100%); }
  .nav { overflow-x: auto; }
  .info-grid, .stat-grid { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .container,
  .brand-row,
  .hero-mini {
    width: calc(100% - 24px);
  }

  .brand-row {
    padding-top: 12px;
    gap: 10px;
  }

  .brand img {
    width: min(260px, 88vw);
  }

  .nav {
    width: 100%;
    justify-content: space-between;
    gap: 4px;
    padding: 4px;
  }

  .nav a {
    flex: 1;
    min-height: 38px;
    padding: 8px 7px;
    justify-content: center;
    font-size: 13px;
  }

  .hero-mini {
    padding: 18px 0 22px;
    gap: 14px;
  }

  h1 {
    font-size: 30px;
  }

  .hero-mini p {
    font-size: 14px;
  }

  .price-box strong {
    font-size: 28px;
  }

  .container {
    margin-top: 18px;
  }

  .page-head,
  .admin-head {
    gap: 14px;
    margin-bottom: 14px;
  }

  .page-head h2,
  .admin-head h2 {
    font-size: 26px;
  }

  .form-grid,
  .search {
    grid-template-columns: 1fr;
  }

  .panel { padding: 16px; }

  .bank-card {
    grid-template-columns: 1fr;
    gap: 10px;
    text-align: left;
  }

  .bank-card img {
    width: 132px;
    height: 90px;
  }

  .bank-card strong {
    font-size: 26px;
    overflow-wrap: anywhere;
  }

  .actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .btn {
    width: 100%;
  }

  .student-item .pill,
  .installment-list .pill,
  .review-row .pill {
    width: 100%;
  }

  .student-item,
  .review-row {
    align-items: flex-start;
    flex-direction: column;
    width: 100%;
  }

  .installment-list article {
    align-items: flex-start;
    flex-direction: column;
  }

  .login-card {
    padding: 16px;
  }

  .admin-card {
    padding: 12px;
  }

  input, select, textarea {
    font-size: 16px;
  }
}