:root {
  --bg: #0a0f1a;
  --panel: #121a2a;
  --panel-soft: #172338;
  --text: #ecf2ff;
  --muted: #8ba1c4;
  --accent: #20d4ff;
  --accent-soft: #4b9bff;
  --danger: #ff5f6d;
  --ok: #44d38f;
  --warn: #ffb04a;
  --border: #24324a;
  --btn-bg: #1f3152;
  --btn-border: #3e5f92;
  --btn-text: #eaf2ff;
}

html[data-theme='light'] {
  --bg: #edf3ff;
  --panel: #ffffff;
  --panel-soft: #f3f8ff;
  --text: #0f1a32;
  --muted: #5c6f94;
  --accent: #1184ff;
  --accent-soft: #35b6ff;
  --danger: #e74f5f;
  --ok: #22aa70;
  --warn: #f4a137;
  --border: #d4e2f7;
  --btn-bg: #dceaff;
  --btn-border: #8fb1e8;
  --btn-text: #12366f;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "Inter", sans-serif;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(32,212,255,.12), transparent 65%),
    radial-gradient(900px 500px at -20% 120%, rgba(75,155,255,.15), transparent 55%),
    var(--bg);
  color: var(--text);
}

.app-shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 280px;
  border-right: 1px solid var(--border);
  background: linear-gradient(165deg, rgba(255,255,255,.02), rgba(255,255,255,.01)), var(--panel);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  position: sticky;
  top: 0;
  align-self: flex-start;
  height: 100vh;
  overflow-y: auto;
}

.glow-border {
  position: relative;
}
.glow-border::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  border-right: 1px solid rgba(32,212,255,.4);
  box-shadow: 6px 0 26px rgba(32,212,255,.2);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.brand-logo {
  width: 264px;
  max-width: 100%;
  height: auto;
  display: block;
}
.brand-version {
  font-size: 12px;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: .5px;
  text-transform: uppercase;
}
.user-card {
  padding: 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel-soft);
}
.user-card small { color: var(--muted); }

.sidebar nav { display: grid; gap: 8px; }
.sidebar nav a,
.logout {
  text-decoration: none;
  color: var(--text);
  padding: 11px 12px;
  border-radius: 12px;
  border: 1px solid transparent;
  transition: .2s ease;
}
.sidebar nav a:hover,
.logout:hover { background: var(--panel-soft); border-color: var(--border); }
.sidebar nav a.active {
  background: linear-gradient(90deg, rgba(32,212,255,.18), rgba(75,155,255,.22));
  border-color: rgba(32,212,255,.4);
  box-shadow: 0 0 25px rgba(32,212,255,.24) inset;
}
.logout { margin-top: auto; color: var(--muted); }

.content { flex: 1; padding: 26px; }
.page-head {
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.page-head h1 { margin: 0; font-size: 28px; }
.page-head p { margin: 8px 0 0; color: var(--muted); }

.grid { display: grid; gap: 16px; }
.grid.cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card {
  background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.01)), var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 12px 35px rgba(0,0,0,.22);
}
.metric { font-size: 30px; font-weight: 800; }
.muted { color: var(--muted); }

.toolbar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
  align-items: flex-end;
}
input, select, textarea, button {
  background: var(--panel-soft);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  font: inherit;
}
textarea { min-height: 90px; resize: vertical; }
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(32,212,255,.15);
}
button {
  cursor: pointer;
  transition: .2s ease;
  min-height: 38px;
  padding: 8px 14px;
  font-weight: 600;
  letter-spacing: .2px;
  background: linear-gradient(180deg, rgba(255,255,255,.09), rgba(255,255,255,.03)), var(--btn-bg);
  color: var(--btn-text);
  border-color: var(--btn-border);
  box-shadow: 0 6px 14px rgba(0,0,0,.16);
}
button.primary {
  background: linear-gradient(90deg, var(--accent), var(--accent-soft));
  border-color: transparent;
  color: #001829;
  font-weight: 700;
  box-shadow: 0 10px 24px rgba(17,132,255,.35);
}
button:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}
button:active {
  transform: translateY(0);
  filter: brightness(.98);
}
button.danger {
  background: linear-gradient(180deg, rgba(255,95,109,.26), rgba(255,95,109,.18));
  border-color: rgba(255,95,109,.75);
  color: #fff2f4;
  box-shadow: 0 6px 14px rgba(231,79,95,.24);
}
.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  min-height: 38px;
  padding: 8px 14px;
  border-radius: 12px;
  font-weight: 600;
  letter-spacing: .2px;
  border: 1px solid var(--btn-border);
  color: var(--btn-text);
  background: linear-gradient(180deg, rgba(255,255,255,.09), rgba(255,255,255,.03)), var(--btn-bg);
  box-shadow: 0 6px 14px rgba(0,0,0,.16);
}
.button-link:hover {
  transform: translateY(-1px);
  filter: brightness(1.05);
}

.toolbar input,
.toolbar select,
.toolbar button,
.toolbar .button-link {
  min-height: 38px;
}

.toolbar span {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 0 2px;
  font-weight: 600;
  min-width: 120px;
}

.grid.cols-2 > .card {
  align-self: start;
}

.form-grid > div,
.form-grid > label {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

label {
  font-weight: 600;
  color: var(--muted);
}

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
th { color: var(--muted); font-weight: 600; }

.full-span { grid-column: 1 / -1; }
.chart {
  display: grid;
  gap: 10px;
  margin-top: 10px;
}
.chart-row {
  display: grid;
  grid-template-columns: minmax(130px, 1fr) minmax(180px, 2fr) auto;
  align-items: center;
  gap: 10px;
}
.chart-label {
  color: var(--muted);
  font-weight: 600;
}
.chart-value {
  font-weight: 700;
  min-width: 34px;
  text-align: right;
}
.chart-track {
  position: relative;
  height: 12px;
  border-radius: 999px;
  background: rgba(255,255,255,.08);
  border: 1px solid var(--border);
  overflow: hidden;
}
.chart-fill {
  display: block;
  height: 100%;
  border-radius: 999px;
}
.chart-fill.sales {
  background: linear-gradient(90deg, #26d6ff, #2f95ff);
  box-shadow: 0 0 16px rgba(38,214,255,.45);
}
.chart-fill.orders {
  background: linear-gradient(90deg, #7ef7b6, #3bc57f);
  box-shadow: 0 0 16px rgba(68,211,143,.45);
}
.monthly-chart {
  display: grid;
  gap: 12px;
  margin-top: 12px;
}
.month-row {
  display: grid;
  grid-template-columns: 90px 1fr 150px;
  gap: 10px;
  align-items: center;
}
.month-label {
  color: var(--muted);
  font-weight: 700;
}
.month-bars {
  display: grid;
  gap: 6px;
}
.month-values {
  display: grid;
  gap: 4px;
  text-align: right;
  font-weight: 700;
  color: var(--muted);
}
.danger-zone {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed rgba(255,95,109,.45);
}
.danger-zone h4 {
  margin: 0 0 6px;
  color: #ff8b96;
}
.integration-tabs-wrap {
  margin-bottom: 14px;
}
.integration-tabs {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.integration-tab {
  display: inline-flex;
  align-items: center;
  padding: 9px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  text-decoration: none;
  color: var(--text);
  background: var(--panel-soft);
  font-weight: 700;
}
.integration-tab.active {
  background: linear-gradient(90deg, rgba(32,212,255,.22), rgba(75,155,255,.24));
  border-color: rgba(32,212,255,.45);
  box-shadow: 0 0 18px rgba(32,212,255,.2) inset;
}
.integration-tab.disabled {
  opacity: .7;
  cursor: not-allowed;
}
.integration-guide {
  margin-top: 14px;
  border-top: 1px solid var(--border);
  padding-top: 12px;
}
.integration-guide h4 {
  margin: 0 0 6px;
}
.integration-guide-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.guide-block {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.01)), var(--panel-soft);
}
.guide-block h5 {
  margin: 0 0 10px;
  color: var(--text);
  font-size: 15px;
  font-weight: 800;
}
.guide-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}
.guide-steps li {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 8px;
  align-items: start;
}
.step-badge {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 12px;
  color: #04182f;
  background: linear-gradient(135deg, var(--accent), var(--accent-soft));
  box-shadow: 0 0 16px rgba(32,212,255,.35);
}
.badge {
  display: inline-flex;
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 12px;
  border: 1px solid var(--border);
}
.badge.ok { color: #8cffcb; border-color: rgba(68,211,143,.5); }
.badge.warn { color: #ffd59c; border-color: rgba(255,176,74,.5); }
.badge.danger { color: #ffc3cb; border-color: rgba(255,95,109,.5); }

.flash {
  margin: 0 0 12px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
}
.flash.success { background: rgba(68,211,143,.14); border-color: rgba(68,211,143,.5); }
.flash.error { background: rgba(255,95,109,.14); border-color: rgba(255,95,109,.5); }

.auth-wrap {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
}
.auth-card {
  width: min(460px, 100%);
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--panel);
  padding: 26px;
  box-shadow: 0 20px 60px rgba(0,0,0,.3);
}
.auth-card h1 { margin-top: 0; }
.auth-logo {
  width: min(100%, 300px);
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto 10px;
}

.form-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.form-grid .full { grid-column: 1 / -1; }

.line-items {
  display: grid;
  gap: 8px;
}
.line-row {
  display: grid;
  grid-template-columns: 1.2fr 1.5fr .8fr .8fr auto;
  gap: 8px;
}

@media (max-width: 1100px) {
  .grid.cols-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid.cols-2 { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; position: static; height: auto; overflow: visible; }
  .glow-border::before { display: none; }
  .content { padding: 14px; }
  .line-row { grid-template-columns: 1fr; }
  .chart-row,
  .month-row {
    grid-template-columns: 1fr;
  }
  .integration-guide-grid {
    grid-template-columns: 1fr;
  }
  .chart-value,
  .month-values {
    text-align: left;
  }
}