:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --ink: #141823;
  --muted: #5d6678;
  --line: #d9dfeb;
  --panel: #ffffff;
  --panel-soft: #eef3f8;
  --green: #16805a;
  --amber: #a26012;
  --red: #b42318;
  --blue: #2754c5;
  --teal: #087d80;
  --violet: #6d3dbf;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: linear-gradient(180deg, #ffffff, var(--bg));
  color: var(--ink);
}

.shell {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 22px 0 36px;
}

.topbar,
.source-grid,
.metric-row,
.card-header {
  display: flex;
  align-items: center;
}

.topbar {
  justify-content: space-between;
  gap: 16px;
  min-height: 44px;
  border-bottom: 1px solid var(--line);
}

.back-link {
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

#updatedAt {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.usage-card,
.details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 18px 50px rgba(31, 43, 64, 0.08);
}

.usage-card {
  min-height: 300px;
  padding: 20px;
}

.card-header {
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
}

.model-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: #fff;
  font-weight: 900;
}

.chatgpt .model-mark { background: var(--green); }
.claude .model-mark { background: var(--violet); }
.grok .model-mark { background: var(--teal); }

.model-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.model-title h2 {
  margin: 0;
  font-size: 22px;
  letter-spacing: 0;
}

.price-line {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.25;
}

.status-pill {
  min-height: 28px;
  padding: 5px 9px;
  border-radius: 999px;
  background: var(--panel-soft);
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.usage-main {
  margin-bottom: 20px;
}

.usage-value {
  margin: 0;
  font-size: 44px;
  line-height: 1;
  font-weight: 900;
  letter-spacing: 0;
}

.usage-label,
.reset-label {
  margin: 8px 0 0;
  color: var(--muted);
  line-height: 1.45;
}

.meter {
  width: 100%;
  height: 10px;
  overflow: hidden;
  margin-top: 18px;
  border-radius: 999px;
  background: #e7ecf4;
}

.meter span {
  display: block;
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: var(--green);
}

.meter.warn span { background: var(--amber); }
.meter.danger span { background: var(--red); }

.metric-list {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.sub-windows {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.sub-window {
  display: grid;
  gap: 3px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.25;
}

.sub-window strong {
  color: var(--ink);
  font-size: 13px;
}

.metric-row {
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.metric-row strong {
  color: var(--ink);
  text-align: right;
}

.details {
  margin-top: 18px;
  padding: 20px 22px;
}

.details h2 {
  margin: 0 0 14px;
  font-size: 18px;
}

.source-grid {
  align-items: stretch;
  gap: 12px;
}

.source-grid div {
  flex: 1;
  min-width: 0;
  padding: 14px;
  border-radius: 8px;
  background: var(--panel-soft);
}

.source-grid strong,
.source-grid span {
  display: block;
}

.source-grid span {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

code {
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.92em;
}

.error {
  padding: 22px;
  border: 1px solid #f0b4ad;
  border-radius: 8px;
  background: #fff4f2;
  color: var(--red);
}

@media (max-width: 860px) {
  .status-grid,
  .source-grid {
    grid-template-columns: 1fr;
    display: grid;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
    padding-bottom: 14px;
  }
}

@media (max-width: 700px) {
  body {
    background: #f7f9fc;
  }

  .shell {
    width: min(100% - 20px, 430px);
    padding: 10px 0 12px;
  }

  .topbar {
    min-height: 34px;
    gap: 4px;
    padding-bottom: 8px;
  }

  .back-link {
    font-size: 14px;
  }

  #updatedAt {
    font-size: 11px;
  }

  .status-grid {
    gap: 8px;
    margin-top: 10px;
  }

  .usage-card {
    min-height: 0;
    padding: 11px 12px;
    box-shadow: none;
  }

  .card-header {
    margin-bottom: 8px;
  }

  .model-mark {
    width: 32px;
    height: 32px;
    font-size: 12px;
  }

  .model-title {
    gap: 9px;
  }

  .model-title h2 {
    font-size: 18px;
  }

  .price-line {
    font-size: 11px;
  }

  .status-pill {
    min-height: 22px;
    padding: 3px 7px;
    font-size: 10px;
  }

  .usage-main {
    margin-bottom: 6px;
  }

  .usage-value {
    font-size: 31px;
  }

  .usage-label,
  .reset-label {
    margin-top: 3px;
    font-size: 12px;
    line-height: 1.25;
  }

  .meter {
    height: 7px;
    margin-top: 8px;
  }

  .sub-windows {
    gap: 4px;
    margin-top: 6px;
  }

  .sub-window {
    gap: 1px;
    padding-top: 4px;
    font-size: 10px;
  }

  .sub-window strong {
    font-size: 11px;
  }

  .metric-list {
    display: none;
  }

  .details {
    display: none;
  }
}