:root {
  --bg: #f3f6f8;
  --surface: #ffffffcc;
  --surface-strong: #ffffff;
  --text: #11212f;
  --muted: #5b6b78;
  --accent: #0b8bd8;
  --accent-2: #15b37d;
  --danger: #c54646;
  --border: #d4dee5;
  --shadow: 0 16px 44px rgba(17, 33, 47, 0.12);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: Manrope, "IBM Plex Sans", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 8%, #cfe9ff 0, transparent 40%),
    radial-gradient(circle at 82% 14%, #cbf9e7 0, transparent 38%),
    linear-gradient(145deg, #e9eef3, #f8fbfc);
}

body {
  padding: 16px;
}

h1,
h2,
h3,
h4,
p {
  margin: 0;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 11px;
  color: var(--muted);
}

.app-shell {
  max-width: 1040px;
  margin: 0 auto;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}

.app-header h1 {
  margin-top: 4px;
  font-size: 29px;
}

.status-banner {
  background: color-mix(in srgb, var(--accent) 14%, white);
  border: 1px solid color-mix(in srgb, var(--accent) 38%, white);
  border-radius: 14px;
  padding: 10px 12px;
  margin-bottom: 12px;
  font-size: 13px;
  color: #0f3d57;
}

.status-banner.hidden {
  display: none;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 16px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
}

.split-tabs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 16px;
}

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

.split-tab {
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease;
}

.split-tab:hover {
  transform: translateY(-1px);
}

.split-tab.active {
  background: linear-gradient(130deg, var(--accent), var(--accent-2));
  color: #fff;
  border-color: transparent;
}

.auth-form,
.stack-form {
  display: grid;
  gap: 12px;
}

.stack-form h3 {
  font-size: 18px;
}

label {
  display: grid;
  gap: 6px;
}

label span {
  font-size: 13px;
  color: var(--muted);
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 11px;
  background: var(--surface-strong);
  color: var(--text);
  padding: 10px 12px;
  font: inherit;
}

textarea {
  resize: vertical;
}

.primary-btn,
.ghost-btn {
  border: 0;
  border-radius: 12px;
  padding: 11px 14px;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.primary-btn {
  color: #fff;
  background: linear-gradient(130deg, var(--accent), var(--accent-2));
}

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

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.kpi-card {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
  background: #fff;
}

.kpi-card p {
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 6px;
}

.kpi-card h3 {
  font-size: 22px;
}

.chart-wrap {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 12px;
  background: #fff;
}

.chart-wrap h3 {
  margin-bottom: 10px;
  font-size: 16px;
}

.stats-chart {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 8px;
  align-items: end;
  min-height: 170px;
  border-bottom: 1px dashed var(--border);
  padding: 8px 0;
}

.chart-col {
  display: grid;
  gap: 5px;
  justify-items: center;
}

.chart-bars {
  display: flex;
  gap: 4px;
  align-items: end;
  height: 130px;
}

.bar {
  width: 12px;
  border-radius: 6px 6px 0 0;
}

.bar.in {
  background: linear-gradient(180deg, #56c7ff, #0b8bd8);
}

.bar.out {
  background: linear-gradient(180deg, #ff927b, #de5443);
}

.chart-label {
  font-size: 11px;
  color: var(--muted);
}

.chart-legend {
  margin-top: 8px;
  font-size: 12px;
  color: var(--muted);
}

.log-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.history-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.list {
  display: grid;
  gap: 8px;
  margin-top: 8px;
}

.item-card {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px;
  background: #fff;
  display: grid;
  gap: 6px;
}

.item-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.item-head h5 {
  margin: 0;
  font-size: 14px;
}

.meta {
  color: var(--muted);
  font-size: 12px;
}

.small-btn {
  border: 1px solid color-mix(in srgb, var(--danger) 34%, white);
  background: color-mix(in srgb, var(--danger) 12%, white);
  color: var(--danger);
  border-radius: 8px;
  font-size: 12px;
  padding: 5px 8px;
  cursor: pointer;
}

.two-col {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.notice-card {
  margin-top: 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  padding: 12px;
  background: #ffffffd9;
}

.notice-card h4 {
  margin-bottom: 6px;
}

.notice-card p {
  color: var(--muted);
}

.toast {
  position: fixed;
  left: 50%;
  transform: translateX(-50%);
  bottom: 18px;
  min-width: 230px;
  max-width: min(90vw, 460px);
  padding: 10px 12px;
  border-radius: 12px;
  background: #182735;
  color: #fff;
  box-shadow: 0 8px 26px rgba(0, 0, 0, 0.3);
  z-index: 10;
}

.hidden {
  display: none !important;
}

@media (max-width: 860px) {
  .kpi-grid,
  .log-grid,
  .history-columns,
  .two-col {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 540px) {
  body {
    padding: 10px;
  }

  .panel {
    padding: 12px;
    border-radius: 16px;
  }

  .app-header h1 {
    font-size: 24px;
  }

  .stats-chart {
    gap: 5px;
  }

  .bar {
    width: 10px;
  }
}