:root {
  --font-sans: "Inter", -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --font-mono: ui-monospace, "Roboto Mono", Menlo, Consolas, monospace;

  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-500: #62748e;
  --slate-600: #45556c;
  --slate-700: #314158;

  --neutral-50: #fafafa;
  --neutral-100: #f5f5f5;
  --neutral-200: #e5e5e5;
  --neutral-300: #d4d4d4;
  --neutral-400: #a1a1a1;
  --neutral-500: #737373;
  --neutral-600: #525252;
  --neutral-700: #404040;
  --neutral-900: #171717;

  --bg-primary: #ffffff;
  --bg-secondary: var(--slate-50);
  --bg-tertiary: var(--neutral-100);
  --text-primary: var(--neutral-900);
  --text-secondary: var(--neutral-700);
  --text-tertiary: var(--neutral-600);
  --text-quaternary: var(--neutral-500);
  --border-primary: var(--neutral-300);
  --border-secondary: var(--neutral-200);
  --brand-solid: var(--slate-600);
  --brand-solid-hover: var(--slate-700);
  --focus-ring: var(--slate-500);
  --success: #00a63e;
  --danger: #e7000b;

  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font-sans);
  color: var(--text-primary);
  background: var(--bg-secondary);
  -webkit-font-smoothing: antialiased;
}

.page {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 1.5rem 1rem 3rem;
}

@media (min-width: 640px) {
  .page { padding: 1.5rem 1.5rem 3rem; }
}

.intro {
  background: var(--bg-primary);
  border-radius: var(--radius-2xl);
  outline: 1px solid color-mix(in srgb, var(--border-secondary) 70%, transparent);
  box-shadow: var(--shadow-sm);
  padding: 1.25rem 1.25rem 1.5rem;
  margin-bottom: 1.5rem;
}

@media (min-width: 640px) {
  .intro { padding: 1.5rem 1.5rem 1.75rem; }
}

.intro h1 {
  margin: 0;
  font-size: 1.5rem;
  line-height: 2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

@media (min-width: 640px) {
  .intro h1 {
    font-size: 1.875rem;
    line-height: 2.375rem;
  }
}

.intro .sub {
  margin: 0.5rem 0 0;
  max-width: 42rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
  color: var(--text-tertiary);
}

.summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(168px, 1fr));
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.stat {
  background: var(--bg-primary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-xl);
  padding: 1.25rem;
  box-shadow: var(--shadow-xs);
}

.stat span {
  display: block;
  margin-bottom: 0.375rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
  color: var(--text-secondary);
}

.stat strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  line-height: 1.75rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

.stat.positive strong { color: var(--success); }
.stat.negative strong { color: var(--danger); }

.block {
  background: var(--bg-primary);
  border: 1px solid var(--border-secondary);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xs);
  margin-bottom: 1.5rem;
  overflow: hidden;
}

.block-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-secondary);
}

.block-head h2 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
}

.block-head .hint {
  margin: 0.25rem 0 0;
  font-size: 0.875rem;
  line-height: 1.25rem;
  color: var(--text-tertiary);
}

.status {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.25rem;
  color: var(--text-quaternary);
  text-align: right;
}

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

.table-wrap {
  overflow-x: auto;
  width: 100%;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  line-height: 1.25rem;
}

th, td {
  text-align: left;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-secondary);
  white-space: nowrap;
  color: var(--text-tertiary);
}

th {
  height: 2.75rem;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
  background: var(--bg-secondary);
  color: var(--text-quaternary);
  font-size: 0.75rem;
  line-height: 1.125rem;
  font-weight: 600;
}

td.num, th.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

tbody tr:hover { background: var(--bg-secondary); }
tbody tr:last-child td { border-bottom: none; }

.month-row {
  background: var(--bg-secondary);
  font-weight: 600;
}

.month-row td { color: var(--text-primary); }

td.num.neg { color: var(--danger); }

td.muted, .muted {
  color: var(--text-quaternary);
  text-align: center;
}

tfoot td {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-secondary);
  border-bottom: none;
  font-weight: 600;
  color: var(--text-primary);
}

@media (max-width: 700px) {
  .block-head {
    flex-direction: column;
    align-items: flex-start;
  }
  .status { text-align: left; }
  th, td { padding-left: 1rem; padding-right: 1rem; }
}

.gate-body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.gate {
  width: 100%;
  max-width: 24rem;
}

.gate-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  background: var(--bg-primary);
  border-radius: var(--radius-2xl);
  outline: 1px solid color-mix(in srgb, var(--border-secondary) 70%, transparent);
  box-shadow: var(--shadow-sm);
  padding: 1.5rem;
}

.gate-card h1 {
  margin: 0;
  font-size: 1.5rem;
  line-height: 2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.gate-sub {
  margin: 0 0 0.5rem;
  font-size: 0.875rem;
  line-height: 1.25rem;
  color: var(--text-tertiary);
}

.label {
  font-size: 0.875rem;
  line-height: 1.25rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.input-wrap {
  display: flex;
  width: 100%;
  border-radius: var(--radius-lg);
  background: var(--bg-primary);
  box-shadow: var(--shadow-xs);
  outline: 1px solid var(--border-primary);
  outline-offset: -1px;
  transition: outline 100ms linear;
}

.input-wrap:focus-within {
  outline: 2px solid var(--focus-ring);
}

.input {
  width: 100%;
  border: 0;
  background: transparent;
  padding: 0.5rem 0.75rem;
  font: 400 1rem/1.5rem var(--font-sans);
  color: var(--text-primary);
}

.input::placeholder { color: var(--text-quaternary); }
.input:focus { outline: none; }

.gate-error {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.25rem;
  color: var(--danger);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 0.25rem;
  border: none;
  border-radius: var(--radius-lg);
  padding: 0.5rem 0.75rem;
  font: 600 0.875rem/1.25rem var(--font-sans);
  cursor: pointer;
  transition: background 100ms linear;
}

.btn-primary {
  background: var(--brand-solid);
  color: #fff;
  box-shadow: var(--shadow-xs);
}

.btn-primary:hover { background: var(--brand-solid-hover); }