:root {
  color-scheme: light;
  --md-sys-color-primary: #0b57d0;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-surface: #f8fafd;
  --md-sys-color-surface-container: #ffffff;
  --md-sys-color-outline: #c5c7cf;
  --md-sys-color-outline-variant: #e2e5ec;
  --md-sys-color-on-surface: #1f1f23;
  --md-sys-color-on-surface-variant: #61636b;
  --md-sys-color-positive: #117243;
  --md-sys-color-negative: #b3261e;
  --md-sys-elevation-1: 0 1px 2px rgba(16, 24, 40, 0.07), 0 1px 3px rgba(16, 24, 40, 0.1);
  --md-sys-elevation-2: 0 4px 12px rgba(16, 24, 40, 0.12);
  --radius-card: 16px;
  --radius-control: 12px;
  --space-1: 8px;
  --space-2: 12px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 32px;
  font-family: "Roboto", "Noto Sans JP", sans-serif;
  background: radial-gradient(circle at top right, #e9f0ff 0%, var(--md-sys-color-surface) 40%, #f7f9fc 100%);
  color: var(--md-sys-color-on-surface);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
}

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: var(--space-4);
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
}

.page-header h1 {
  margin: 0;
  line-height: 1.35;
  font-size: clamp(1.15rem, 2.7vw, 1.6rem);
}

.session-box {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.92rem;
}

.panel {
  background: var(--md-sys-color-surface-container);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--radius-card);
  padding: var(--space-3);
  margin-bottom: var(--space-3);
  box-shadow: var(--md-sys-elevation-1);
}

.panel h2 {
  margin-top: 0;
  margin-bottom: var(--space-2);
  font-size: 1.06rem;
}

.controls {
  display: grid;
  grid-template-columns: repeat(4, minmax(140px, 1fr));
  gap: var(--space-2);
  align-items: end;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--md-sys-color-on-surface-variant);
}

input,
select,
button {
  width: 100%;
  font: inherit;
  border-radius: var(--radius-control);
}

input,
select {
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--md-sys-color-outline);
  background: #fff;
  color: var(--md-sys-color-on-surface);
}

input:focus,
select:focus,
button:focus-visible {
  outline: 3px solid rgba(11, 87, 208, 0.24);
  outline-offset: 1px;
}

button {
  min-height: 44px;
  border: none;
  padding: 11px 14px;
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  font-weight: 500;
  cursor: pointer;
  box-shadow: var(--md-sys-elevation-1);
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: var(--md-sys-elevation-2);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

#metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(140px, 1fr));
  gap: var(--space-2);
}

.metric-card {
  padding: 12px;
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--radius-control);
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: #fff;
}

.metric-card strong {
  font-size: 1.08rem;
}

.metric-card.up strong {
  color: var(--md-sys-color-positive);
}

.metric-card.down strong {
  color: var(--md-sys-color-negative);
}

#chart {
  height: 460px;
}

.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

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

th,
td {
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  padding: 10px 8px;
  text-align: left;
  font-size: 0.9rem;
  vertical-align: top;
}

th {
  color: var(--md-sys-color-on-surface-variant);
  font-weight: 500;
  background: #fafbff;
}

.positive {
  color: var(--md-sys-color-positive);
  font-weight: 600;
}

.negative {
  color: var(--md-sys-color-negative);
  font-weight: 600;
}

.neutral {
  color: #637083;
  font-weight: 600;
}

.auth-container {
  max-width: 560px;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-panel {
  width: 100%;
}

.auth-panel h1 {
  margin-top: 0;
  margin-bottom: var(--space-1);
}

.auth-panel p {
  margin-top: 0;
}

.auth-panel form {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.checkbox-row {
  flex-direction: row;
  align-items: center;
  gap: 10px;
  color: var(--md-sys-color-on-surface);
  font-size: 0.92rem;
}

.checkbox-row input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin: 0;
  min-height: 18px;
}

.error-message {
  min-height: 1.2em;
  color: var(--md-sys-color-negative);
  font-size: 0.9rem;
  margin-bottom: 0;
}

@media (max-width: 768px) {
  .container {
    padding: var(--space-3);
  }

  .page-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .session-box {
    width: 100%;
    justify-content: space-between;
  }

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

  #metrics {
    grid-template-columns: 1fr;
  }

  #chart {
    height: 320px;
  }

  .panel {
    padding: var(--space-2);
    margin-bottom: var(--space-2);
  }

  .auth-container {
    align-items: flex-start;
    padding-top: var(--space-5);
  }
}