:root {
  --brand: #6c5ce7;
  --brand-strong: #4834d4;
  --bg: #0f172a;
  --panel: #1e293b;
  --panel-alt: #243554;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #facc15;
  --danger: #f87171;
  --success: #34d399;
  --radius: 16px;
  --shadow: 0 20px 45px -20px rgba(15, 23, 42, 0.8);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, rgba(76, 29, 149, 0.35), transparent 55%),
              var(--bg);
  color: var(--text);
  display: flex;
  flex-direction: column;
}

a {
  color: inherit;
}

.layout {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px clamp(24px, 6vw, 60px);
  background: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
  flex-wrap: wrap;
  gap: 16px;
}

.brand {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 20px;
  font-size: 15px;
  flex-wrap: wrap;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

main {
  flex: 1;
  padding: clamp(24px, 6vw, 60px);
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.page-title {
  font-size: clamp(28px, 4vw, 36px);
  margin: 0;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  max-width: 720px;
  line-height: 1.6;
}

.grid {
  display: grid;
  gap: 24px;
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.card {
  background: var(--panel);
  border: 1px solid rgba(148, 163, 184, 0.1);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.hero {
  position: relative;
  background: linear-gradient(135deg, rgba(76, 29, 149, 0.6), rgba(30, 58, 138, 0.5));
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(250, 204, 21, 0.25), transparent 50%);
  pointer-events: none;
}

.hero > * {
  position: relative;
  z-index: 1;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: 12px;
  border: none;
  background: var(--brand);
  color: white;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.2s ease;
  box-shadow: 0 12px 25px -14px rgba(108, 92, 231, 0.9);
}

.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px -12px rgba(108, 92, 231, 0.9);
}

.button.secondary {
  background: rgba(148, 163, 184, 0.15);
  color: var(--text);
  box-shadow: none;
}

.button.danger {
  background: var(--danger);
  box-shadow: 0 12px 25px -14px rgba(248, 113, 113, 0.8);
}

.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

.form-field label {
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.form-field input,
.form-field select,
.form-field textarea {
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(148, 163, 184, 0.2);
  background: rgba(15, 23, 42, 0.8);
  color: var(--text);
  font-size: 15px;
}

.form-field textarea {
  resize: vertical;
  min-height: 96px;
}

.form-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.section-title {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 20px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.04em;
  background: rgba(108, 92, 231, 0.2);
}

.list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.list li {
  list-style: none;
  margin: 0;
  padding: 0;
}

.list-item {
  border: 1px solid rgba(148, 163, 184, 0.1);
  border-radius: 16px;
  padding: 18px;
  background: rgba(15, 23, 42, 0.65);
  list-style: none;
}

.balance {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 600;
}

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

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

.status-indicator {
  margin-top: 20px;
  font-size: clamp(24px, 6vw, 32px);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 22px;
  border-radius: 16px;
}

.status-indicator.success {
  color: var(--success);
  background: rgba(52, 211, 153, 0.12);
  border: 1px solid rgba(52, 211, 153, 0.35);
}

.status-indicator.danger {
  color: var(--danger);
  background: rgba(248, 113, 113, 0.12);
  border: 1px solid rgba(248, 113, 113, 0.4);
}

.status-indicator.warning {
  color: var(--accent);
  background: rgba(250, 204, 21, 0.15);
  border: 1px solid rgba(250, 204, 21, 0.4);
}

.warning-text {
  color: var(--accent);
  font-weight: 600;
}

.notice {
  border-radius: 16px;
  padding: 16px;
  border: 1px dashed rgba(250, 204, 21, 0.4);
  background: rgba(250, 204, 21, 0.1);
  color: var(--accent);
}

.table {
  width: 100%;
  border-collapse: collapse;
  border-radius: 16px;
  overflow: hidden;
}

.table thead {
  background: rgba(148, 163, 184, 0.15);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 12px;
}

.table th,
.table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid rgba(148, 163, 184, 0.1);
}

.alert {
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid rgba(248, 113, 113, 0.3);
  background: rgba(248, 113, 113, 0.12);
  color: var(--danger);
  font-weight: 500;
}

.qr-box {
  display: flex;
  justify-content: center;
  align-items: center;
  background: white;
  border-radius: 16px;
  padding: 20px;
}

.qr-box canvas {
  width: 200px;
  height: 200px;
}

.details-group {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.details-card {
  background: rgba(15, 23, 42, 0.55);
  border-radius: 16px;
  border: 1px solid rgba(148, 163, 184, 0.1);
  padding: 0;
  overflow: hidden;
}

.details-card summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 24px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  background: rgba(148, 163, 184, 0.08);
}

.details-card summary::marker {
  display: none;
}

.details-card[open] summary {
  background: rgba(148, 163, 184, 0.16);
}

.details-card summary span.icon {
  font-size: 20px;
  transition: transform 0.2s ease;
}

.details-card[open] summary span.icon {
  transform: rotate(90deg);
}

.details-card .details-content {
  padding: 20px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.stack-sm {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

footer {
  padding: 24px;
  text-align: center;
  color: rgba(148, 163, 184, 0.7);
  font-size: 14px;
}

@media (max-width: 960px) {
  main {
    padding: 24px;
  }

  .grid-2 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .navbar {
    justify-content: center;
  }

  .nav-links {
    justify-content: center;
    gap: 12px;
  }

  .card {
    padding: 20px;
  }

  .form-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .button,
  .button.secondary {
    width: 100%;
  }
}