:root {
  --bg: #e9eef6;
  --card: #ffffff;
  --text: #1f2937;
  --muted: #8b95a5;
  --label: #6b7280;
  --line: #e6ebf2;
  --blue: #1a73e8;
  --blue-deep: #1565d8;
  --ink: #1c2430;
  --green: #22c55e;
  --danger: #ef4444;
  --shadow: 0 18px 50px rgba(31, 45, 80, 0.08);
  font-family: "Be Vietnam Pro", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  height: 68px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 22px;
  border-bottom: 1px solid #f0f3f8;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}
.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(180deg, #3b82f6, #1d4ed8);
  display: grid;
  place-items: center;
  box-shadow: 0 6px 14px rgba(29, 78, 216, 0.28);
}
.brand-name { font-weight: 800; font-size: 15px; line-height: 1.15; }
.brand-sub { color: var(--muted); font-size: 12px; font-weight: 500; }
.top-actions { display: flex; align-items: center; gap: 14px; }
.user-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  color: #374151;
  font-size: 14px;
  font-weight: 600;
  max-width: 140px;
}
.user-chip span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.15);
  flex: none;
}
.btn-history, .btn-dark {
  background: var(--ink);
  color: #fff;
  border: 0;
  border-radius: 12px;
  padding: 9px 14px;
  font: inherit;
  font-weight: 700;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  text-decoration: none;
}
.btn-history:hover, .btn-dark:hover { background: #111827; }

.stage {
  min-height: calc(100vh - 68px - 46px);
  display: grid;
  place-items: center;
  padding: 28px 16px 64px;
}
.card {
  width: min(440px, 100%);
  background: var(--card);
  border-radius: 22px;
  box-shadow: var(--shadow);
  padding: 28px 26px 22px;
}
.wordmark {
  text-align: center;
  font-weight: 900;
  font-style: italic;
  font-size: 40px;
  letter-spacing: -1px;
  color: #1d74ea;
  line-height: 1;
  margin: 4px 0 8px;
}
.card h1 {
  margin: 0;
  text-align: center;
  font-size: 22px;
  letter-spacing: 0.2px;
}
.lead {
  margin: 8px 0 22px;
  text-align: center;
  color: #9aa3b2;
  font-size: 14px;
}
.field { margin-bottom: 16px; }
.field label {
  display: block;
  margin-bottom: 8px;
  color: #7b8494;
  font-size: 13.5px;
  font-weight: 600;
}
.row { display: grid; grid-template-columns: 1fr 148px; gap: 10px; }
.input, .select {
  width: 100%;
  height: 46px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 12px;
  padding: 0 14px;
  font: inherit;
  font-size: 14px;
  color: var(--text);
  outline: none;
}
.input::placeholder { color: #c0c6d0; }
.input:focus, .select:focus { border-color: #93c5fd; box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.12); }
.select { appearance: none; background-image: linear-gradient(45deg, transparent 50%, #9ca3af 50%), linear-gradient(135deg, #9ca3af 50%, transparent 50%); background-position: calc(100% - 18px) 20px, calc(100% - 12px) 20px; background-size: 6px 6px, 6px 6px; background-repeat: no-repeat; padding-right: 28px; }
.amount-wrap { position: relative; }
.amount-wrap .input { padding-right: 74px; }
.vnd {
  position: absolute;
  right: 8px;
  top: 7px;
  height: 32px;
  padding: 0 12px;
  border: 0;
  border-radius: 9px;
  background: #dcfce7;
  color: #16a34a;
  font: inherit;
  font-weight: 800;
  font-size: 13px;
}
.human {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  background: #fbfcfe;
}
.human label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  color: #4b5563;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}
.human input { width: 22px; height: 22px; accent-color: #f97316; }
.cf-mark { color: #9ca3af; font-size: 11px; font-weight: 800; letter-spacing: 0.8px; }
.submit {
  width: 100%;
  height: 48px;
  margin-top: 18px;
  border: 0;
  border-radius: 12px;
  background: #e5e7eb;
  color: #9ca3af;
  font: inherit;
  font-weight: 800;
  font-size: 15px;
  cursor: not-allowed;
}
.submit.ready {
  background: var(--blue);
  color: #fff;
  cursor: pointer;
  box-shadow: 0 8px 18px rgba(26, 115, 232, 0.28);
}
.submit.ready:hover { background: var(--blue-deep); }
.form-error {
  display: none;
  margin-top: 10px;
  color: var(--danger);
  font-size: 13px;
  font-weight: 600;
  text-align: center;
}

.ticker {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: 46px;
  background: #fff;
  border-top: 1px solid #eef1f6;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.ticker-track {
  display: flex;
  gap: 42px;
  white-space: nowrap;
  animation: marquee 28s linear infinite;
  padding-left: 20px;
  font-size: 13.5px;
  color: #4b5563;
  font-weight: 600;
}
.ticker b { color: #111827; }
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  display: none;
  place-items: center;
  z-index: 40;
  padding: 16px;
}
.overlay.show { display: grid; }
.modal {
  width: min(420px, 100%);
  background: #fff;
  border-radius: 18px;
  padding: 22px;
  box-shadow: var(--shadow);
}
.modal h2 { margin: 0 0 8px; font-size: 18px; }
.modal p { margin: 0; color: #6b7280; line-height: 1.5; }
.modal .count { margin-top: 10px; font-weight: 800; color: var(--blue); }
.modal.ok h2 { color: #15803d; }
.modal.bad h2 { color: var(--danger); }
.modal-actions { display: flex; gap: 8px; margin-top: 16px; }
.modal-actions button, .modal-actions a {
  flex: 1;
  height: 42px;
  border-radius: 10px;
  border: 0;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  display: grid;
  place-items: center;
  text-decoration: none;
}
.btn-ghost { background: #f3f4f6; color: #374151; }
.btn-go { background: var(--blue); color: #fff; }

.panel {
  position: fixed;
  top: 0;
  right: 0;
  width: min(380px, 100%);
  height: 100%;
  background: #fff;
  z-index: 50;
  box-shadow: -12px 0 40px rgba(15, 23, 42, 0.12);
  transform: translateX(100%);
  transition: transform 0.2s ease;
  display: flex;
  flex-direction: column;
}
.panel.show { transform: translateX(0); }
.panel header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 16px 12px;
  border-bottom: 1px solid var(--line);
}
.panel header h2 { margin: 0; font-size: 16px; }
.panel header button { border: 0; background: transparent; font-size: 20px; cursor: pointer; }
.panel .list { overflow: auto; padding: 12px 16px 24px; }
.hist-item {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 12px;
  margin-bottom: 10px;
}
.hist-item strong { display: block; }
.tag {
  display: inline-block;
  margin-top: 6px;
  font-size: 12px;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 999px;
}
.tag.pending { background: #fef3c7; color: #b45309; }
.tag.approved { background: #dcfce7; color: #15803d; }
.tag.rejected, .tag.timeout { background: #fee2e2; color: #b91c1c; }
.empty { color: var(--muted); font-size: 14px; }

.admin-wrap { width: min(980px, 100%); }
.admin-card { width: min(420px, 100%); }
.table-wrap { overflow: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: #6b7280; font-size: 12px; font-weight: 700; }
.actions { display: flex; gap: 6px; }
.actions button {
  border: 0;
  border-radius: 8px;
  padding: 7px 10px;
  font: inherit;
  font-weight: 700;
  font-size: 12px;
  cursor: pointer;
  color: #fff;
}
.btn-ok { background: #16a34a; }
.btn-no { background: #dc2626; }
.login-error { color: var(--danger); font-size: 13px; font-weight: 600; min-height: 18px; margin-top: 8px; }
.admin-note { color: #6b7280; font-size: 13px; margin: 0 0 14px; }

@media (max-width: 640px) {
  .topbar { padding: 0 12px; }
  .brand-sub, .user-chip { display: none; }
  .row { grid-template-columns: 1fr; }
  .card h1 { font-size: 18px; }
}