:root {
  --bg: #0f0f1a;
  --bg-card: #1a1a2e;
  --bg-hover: #232342;
  --border: #2a2a4a;
  --text: #e4e4f0;
  --text-dim: #8888aa;
  --text-muted: #666688;
  --primary: #6c5ce7;
  --primary-hover: #7f70f0;
  --success: #00b894;
  --danger: #e74c3c;
  --warning: #fdcb6e;
  --info: #0984e3;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--primary-hover);
}

/* Layout */
.app-layout {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: 240px;
  background: var(--bg-card);
  border-right: 1px solid var(--border);
  padding: 0;
  position: fixed;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
  transition: transform 0.3s;
}

.sidebar-header {
  padding: 24px 20px;
  border-bottom: 1px solid var(--border);
}

.sidebar-header h1 {
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary), var(--info));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.sidebar-header p {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  color: var(--text-dim);
  font-size: 14px;
  font-weight: 500;
  border-left: 3px solid transparent;
  transition: all 0.2s;
  cursor: pointer;
}

.nav-item:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.nav-item.active {
  background: var(--bg-hover);
  color: var(--primary);
  border-left-color: var(--primary);
}

.nav-item svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.nav-section {
  padding: 16px 20px 8px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  font-weight: 600;
}

.main-content {
  margin-left: 240px;
  flex: 1;
  padding: 32px;
  min-width: 0;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.page-header h2 {
  font-size: 24px;
  font-weight: 700;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.card-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Grid */
.grid {
  display: grid;
  gap: 20px;
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 1024px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .main-content { margin-left: 0; padding: 20px 16px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* Stat cards */
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon svg { width: 24px; height: 24px; }

.stat-icon.green { background: rgba(0, 184, 148, 0.15); color: var(--success); }
.stat-icon.red { background: rgba(231, 76, 60, 0.15); color: var(--danger); }
.stat-icon.blue { background: rgba(9, 132, 227, 0.15); color: var(--info); }
.stat-icon.purple { background: rgba(108, 92, 231, 0.15); color: var(--primary); }
.stat-icon.yellow { background: rgba(253, 203, 110, 0.15); color: var(--warning); }

.stat-info h3 {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
}

.stat-info p {
  font-size: 13px;
  color: var(--text-dim);
}

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.badge-success { background: rgba(0, 184, 148, 0.15); color: var(--success); }
.badge-danger { background: rgba(231, 76, 60, 0.15); color: var(--danger); }
.badge-warning { background: rgba(253, 203, 110, 0.15); color: var(--warning); }
.badge-info { background: rgba(9, 132, 227, 0.15); color: var(--info); }
.badge-muted { background: rgba(136, 136, 170, 0.15); color: var(--text-dim); }

.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* Forms */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 14px;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.15);
}

.form-control::placeholder { color: var(--text-muted); }

textarea.form-control {
  min-height: 80px;
  resize: vertical;
  font-family: "SF Mono", "Fira Code", monospace;
  font-size: 13px;
}

select.form-control {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%238888aa' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  white-space: nowrap;
}

.btn svg { width: 16px; height: 16px; }

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #c0392b; }

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #00a381; }

.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.btn-sm { padding: 6px 14px; font-size: 12px; }
.btn-block { width: 100%; }

/* Tables */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-sm);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

thead {
  background: var(--bg-hover);
}

th {
  text-align: left;
  padding: 12px 16px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-dim);
  white-space: nowrap;
}

td {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
}

tbody tr {
  transition: background 0.15s;
}

tbody tr:hover {
  background: var(--bg-hover);
}

/* Login */
.login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 20px;
}

.login-card {
  width: 100%;
  max-width: 400px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
}

.login-card h1 {
  font-size: 24px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 8px;
}

.login-card p.subtitle {
  text-align: center;
  color: var(--text-dim);
  font-size: 14px;
  margin-bottom: 32px;
}

/* Alerts */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.alert-success { background: rgba(0, 184, 148, 0.1); border: 1px solid rgba(0, 184, 148, 0.3); color: var(--success); }
.alert-error { background: rgba(231, 76, 60, 0.1); border: 1px solid rgba(231, 76, 60, 0.3); color: var(--danger); }
.alert-warning { background: rgba(253, 203, 110, 0.1); border: 1px solid rgba(253, 203, 110, 0.3); color: var(--warning); }

/* Log entries */
.log-entry {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.log-entry:last-child { border-bottom: none; }

.log-time {
  font-size: 12px;
  color: var(--text-muted);
  font-family: "SF Mono", monospace;
  white-space: nowrap;
  flex-shrink: 0;
  width: 180px;
}

.log-type {
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 4px;
  text-transform: uppercase;
  flex-shrink: 0;
  width: 70px;
  text-align: center;
}

.log-type.INFO { background: rgba(9, 132, 227, 0.15); color: var(--info); }
.log-type.SUCCESS { background: rgba(0, 184, 148, 0.15); color: var(--success); }
.log-type.ERROR { background: rgba(231, 76, 60, 0.15); color: var(--danger); }
.log-type.WARNING { background: rgba(253, 203, 110, 0.15); color: var(--warning); }
.log-type.SYSTEM { background: rgba(108, 92, 231, 0.15); color: var(--primary); }

.log-msg {
  flex: 1;
  font-size: 13px;
}

/* QRIS preview */
.qris-preview {
  text-align: center;
  padding: 24px;
}

.qris-preview img {
  max-width: 280px;
  width: 100%;
  border-radius: var(--radius-sm);
}

.qris-code {
  font-family: "SF Mono", monospace;
  font-size: 11px;
  background: var(--bg);
  padding: 12px;
  border-radius: var(--radius-sm);
  word-break: break-all;
  margin-top: 16px;
  color: var(--text-dim);
}

/* JSON viewer */
.json-view {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  font-family: "SF Mono", monospace;
  font-size: 13px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  max-height: 400px;
  overflow-y: auto;
}

/* Toggle */
.toggle-menu {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 200;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  cursor: pointer;
  color: var(--text);
}

@media (max-width: 768px) {
  .toggle-menu { display: block; }
}

/* Loading spinner */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Misc */
.text-dim { color: var(--text-dim); }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-center { text-align: center; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.gap-2 { gap: 8px; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.text-sm { font-size: 13px; }
.text-xs { font-size: 12px; }
.mono { font-family: "SF Mono", "Fira Code", monospace; }
.overflow-auto { overflow: auto; }
.cursor-pointer { cursor: pointer; }