:root {
  --bg: #f2f5f9;
  --surface: #ffffff;
  --surface-alt: #eef4ff;
  --primary: #122b4d;
  --primary-strong: #0c1f37;
  --accent: #1ea97c;
  --accent-soft: #dff8ee;
  --danger: #c93a3a;
  --danger-soft: #fdecec;
  --warning: #d79d27;
  --warning-soft: #fff3d8;
  --muted: #65758c;
  --border: #dfe7f1;
  --shadow: 0 18px 40px rgba(15, 23, 42, 0.08);
  --radius: 18px;
  --radius-sm: 12px;
  --max-width: 1500px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(180deg, #edf3fb 0%, #f7f9fc 100%);
  color: var(--primary);
}

body {
  min-height: 100vh;
}

button, input, select {
  font: inherit;
}

.app-shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  min-height: 100vh;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px;
  gap: 24px;
}

.sidebar {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: linear-gradient(180deg, var(--primary) 0%, var(--primary-strong) 100%);
  color: #fff;
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 20px 18px;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, #3b82f6 0%, #22c55e 100%);
  font-weight: 800;
}

.brand-block strong,
.brand-block span {
  display: block;
}

.brand-block span {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.76rem;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 32px;
}

.nav-item {
  display: block;
  padding: 12px 14px;
  border-radius: 12px;
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  font-weight: 600;
  transition: 0.2s ease;
}

.nav-item:hover,
.nav-item.active {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.sidebar-footer {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.85rem;
}

.main-panel {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px 22px;
}

.eyebrow {
  margin: 0 0 4px;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.topbar h1 {
  margin: 0;
  font-size: clamp(1.5rem, 2vw, 2.2rem);
}

.topbar-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.clock-box,
.date-box {
  display: flex;
  flex-direction: column;
  min-width: 120px;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 8px 12px;
}

.clock-box span,
.date-box span {
  color: var(--muted);
  font-size: 0.72rem;
}

.clock-box strong,
.date-box strong {
  font-size: 1.05rem;
}

.status-banner {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--accent-soft);
  color: #0d513d;
  border: 1px solid #b7e7d4;
  border-radius: 14px;
  padding: 14px 16px;
  font-weight: 600;
}

.status-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: #74d39f;
  box-shadow: 0 0 0 4px rgba(39, 174, 96, 0.12);
}

.status-dot.offline {
  background: #d9534f;
  box-shadow: 0 0 0 4px rgba(217, 83, 79, 0.12);
}

.status-dot.warning {
  background: var(--warning);
  box-shadow: 0 0 0 4px rgba(215, 157, 39, 0.12);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.metric-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  min-height: 120px;
}

.metric-card.accent {
  background: linear-gradient(135deg, #173763 0%, #1f4f81 100%);
  color: #fff;
}

.metric-card.warning {
  background: linear-gradient(135deg, #fff8e7 0%, #fff2d0 100%);
}

.metric-card label {
  color: var(--muted);
  font-size: 0.76rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.metric-card.accent label {
  color: rgba(255, 255, 255, 0.8);
}

.metric-card strong {
  margin-top: auto;
  font-size: clamp(1.8rem, 2vw, 2.4rem);
  line-height: 1.1;
}

.metric-card small {
  margin-top: 6px;
  color: var(--muted);
}

.metric-card.accent small {
  color: rgba(255, 255, 255, 0.8);
}

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
  gap: 20px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.panel-header h2 {
  margin: 0;
  font-size: 1.2rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 0 10px;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.badge.neutral {
  background: #edf1f7;
  color: var(--primary);
}

.badge.info {
  background: #e7f1ff;
  color: #1f4f81;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field.full-width {
  grid-column: 1 / -1;
}

label {
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--primary);
}

input,
select,
button {
  border-radius: 12px;
}

input,
select {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--primary);
  padding: 0 12px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus,
select:focus {
  border-color: #7fb6ff;
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.12);
}

.actions-row {
  display: flex;
  gap: 12px;
  margin-top: 20px;
  flex-wrap: wrap;
}

button {
  border: 0;
  cursor: pointer;
  font-weight: 700;
  transition: transform 0.15s ease, opacity 0.2s ease;
}

button:hover {
  transform: translateY(-1px);
}

.primary-btn {
  background: linear-gradient(135deg, #1457ad 0%, #0d3769 100%);
  color: #fff;
  min-height: 46px;
  padding: 0 20px;
}

.secondary-btn,
.ghost-btn {
  background: #eef7ff;
  color: #0d3d66;
  min-height: 46px;
  padding: 0 18px;
}

.ghost-btn {
  background: #f5f7fb;
  color: var(--primary);
}

.form-message {
  min-height: 24px;
  margin-top: 14px;
  font-size: 0.92rem;
  font-weight: 600;
}

.form-message.success {
  color: #0a7b52;
}

.form-message.error {
  color: var(--danger);
}

.form-message.info {
  color: #1b5ea9;
}

.queue-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 180px;
}

.queue-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  background: #f7fafc;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
}

.queue-item small {
  display: block;
  color: var(--muted);
}

.queue-item strong {
  display: block;
  margin-bottom: 3px;
}

.queue-status {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 86px;
  border-radius: 999px;
  padding: 6px 10px;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
}

.queue-status.pending {
  background: #fff3d8;
  color: #9b5f00;
}

.queue-status.synced {
  background: #dff8ee;
  color: #0b7d4d;
}

.queue-status.failed {
  background: #fdecec;
  color: #a22d2d;
}

.empty-state {
  text-align: center;
  color: var(--muted);
  padding: 18px;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 620px;
}

th, td {
  padding: 12px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  color: var(--muted);
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

tbody tr:hover {
  background: #f8fbff;
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
    padding: 16px;
  }

  .sidebar {
    padding: 16px;
  }

  .metrics-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 640px) {
  .topbar {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .metrics-grid,
  .field-grid {
    grid-template-columns: 1fr;
  }

  .actions-row {
    flex-direction: column;
  }

  .primary-btn,
  .secondary-btn,
  .ghost-btn {
    width: 100%;
  }
}