:root {
  color-scheme: light;
  --canvas: #f5f5f7;
  --surface: #ffffff;
  --surface-muted: #f5f5f7;
  --ink: #1d1d1f;
  --ink-muted: #6e6e73;
  --line: #d2d2d7;
  --accent: #0071e3;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --radius-card: 18px;
  --radius-control: 12px;
  --radius-inner: 14px;
  --shadow-card: 0 2px 12px rgb(0 0 0 / 0.06);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { background: var(--canvas); }

body {
  min-inline-size: 320px;
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.5;
  overflow-wrap: anywhere;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

button,
input { font: inherit; }

button { color: inherit; }

button:focus-visible,
input:focus-visible,
summary:focus-visible,
.table-scroll:focus-visible,
.text-link:focus-visible,
.skip-link:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

h1,
h2,
h3,
p { margin-block: 0; }

h1 {
  font-size: 21px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.022em;
}

h2 {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.018em;
}

h3 {
  margin-block: var(--space-8) var(--space-2);
  color: var(--ink-muted);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.4;
}

.sr-only {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  inset-block-start: var(--space-3);
  inset-inline-start: var(--space-3);
  z-index: 20;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-control);
  background: var(--accent);
  color: var(--surface);
  font-weight: 600;
  text-decoration: none;
  transform: translateY(-160%);
}

.skip-link:focus { transform: translateY(0); }

.app-header {
  position: sticky;
  inset-block-start: 0;
  z-index: 10;
  border-block-end: 1px solid var(--line);
  background: rgb(255 255 255 / 0.82);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
}

.header-inner {
  max-inline-size: 1200px;
  min-block-size: 72px;
  margin-inline: auto;
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.header-date,
.meta {
  color: var(--ink-muted);
  font-size: 13px;
  font-weight: 400;
}

.header-date { margin-block-start: 2px; }

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.icon-button,
.text-button,
.text-link,
.primary-button {
  min-inline-size: 44px;
  min-block-size: 44px;
  border: 0;
  border-radius: var(--radius-control);
  cursor: pointer;
  transition: transform 120ms ease-out, background-color 120ms ease-out, color 120ms ease-out, opacity 120ms ease-out;
}

.icon-button:active,
.text-button:active,
.text-link:active,
.primary-button:active { transform: translateY(1px); }

.icon-button:disabled,
.primary-button:disabled {
  cursor: wait;
  opacity: 0.55;
}

.icon-button {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding-inline: var(--space-3);
  background: transparent;
}

.icon-button:hover {
  background: var(--surface-muted);
  color: var(--accent);
}

.icon-button svg,
.brand-mark svg {
  inline-size: 19px;
  block-size: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.text-button,
.text-link {
  padding-inline: var(--space-3);
  background: transparent;
  color: var(--ink-muted);
}

.text-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

.text-button:hover,
.text-link:hover {
  background: var(--surface-muted);
  color: var(--ink);
}

.dashboard {
  max-inline-size: 1200px;
  margin-inline: auto;
  padding: var(--space-6) var(--space-4) var(--space-12);
}

.stack {
  min-inline-size: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.dashboard-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-5);
  margin-block-start: var(--space-5);
}

.panel {
  min-inline-size: 0;
  padding: var(--space-6);
  border-radius: var(--radius-card);
  background: var(--surface);
  box-shadow: var(--shadow-card);
}

.panel-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-2) var(--space-5);
  margin-block-end: var(--space-6);
}

.eyebrow {
  margin-block-end: var(--space-1);
  color: var(--ink-muted);
  font-size: 11px;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.04em;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4) 0;
}

.metric-card {
  min-inline-size: 0;
  padding: var(--space-3) var(--space-4);
  border-inline-start: 1px solid var(--line);
}

.metric-card:nth-child(odd) {
  padding-inline-start: 0;
  border-inline-start: 0;
}

.metric-card p {
  color: var(--ink-muted);
  font-size: 13px;
  font-weight: 500;
}

.metric-card strong {
  display: block;
  margin-block: var(--space-2) var(--space-1);
  font-size: clamp(28px, 5vw, 32px);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.metric-card-accent strong { color: var(--ink); }

.metric-card span {
  display: block;
  color: var(--ink-muted);
  font-size: 12px;
  font-weight: 400;
}

.status-chip,
.count-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-inline-size: 24px;
  min-block-size: 24px;
  padding-inline: var(--space-2);
  border-radius: 999px;
  background: var(--surface-muted);
  color: var(--ink-muted);
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
}

.table-scroll {
  max-inline-size: 100%;
  overflow-x: auto;
  overscroll-behavior-inline: contain;
  scrollbar-color: var(--line) transparent;
}

table {
  inline-size: 100%;
  min-inline-size: 440px;
  border-collapse: collapse;
  font-size: 13px;
  font-variant-numeric: tabular-nums;
}

th,
td {
  padding: var(--space-3) var(--space-2);
  border-block-end: 1px solid var(--line);
  text-align: start;
  vertical-align: top;
}

th {
  color: var(--ink-muted);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

td:nth-last-child(1),
th:nth-last-child(1) { text-align: end; }

.empty-cell,
.empty-state {
  color: var(--ink-muted);
  text-align: start !important;
}

.disclosure {
  margin-block-start: var(--space-5);
  border-block-start: 1px solid var(--line);
}

.disclosure summary {
  min-block-size: 48px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-2);
  color: var(--ink-muted);
  cursor: pointer;
  font-weight: 500;
}

.disclosure summary::before {
  content: "›";
  color: var(--ink-muted);
  font-size: 18px;
  line-height: 1;
}

.disclosure[open] summary {
  color: var(--ink);
  font-weight: 600;
}

.disclosure[open] summary::before {
  content: "⌄";
  color: var(--ink);
}

.disclosure-list .disclosure { margin-block-start: 0; }

.todo-list,
.data-list,
.text-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.todo-list { padding-block-end: var(--space-4); }

.todo-list li {
  padding-block: var(--space-2);
  padding-inline-start: calc(var(--depth, 0) * 16px);
}

.challenge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(200px, 100%), 1fr));
  gap: var(--space-3);
}

.challenge-card {
  padding: var(--space-4);
  border-radius: var(--radius-inner);
  background: var(--surface-muted);
}

.challenge-card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-2);
}

.challenge-card strong {
  font-size: 15px;
  font-weight: 600;
}

.challenge-card .day {
  color: var(--ink-muted);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}

.challenge-card dl {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
  margin-block: var(--space-4);
}

.challenge-card dt {
  color: var(--ink-muted);
  font-size: 12px;
}

.challenge-card dd {
  margin: var(--space-1) 0 0;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

progress {
  inline-size: 100%;
  block-size: 6px;
  border: 0;
  border-radius: 999px;
  overflow: hidden;
  background: var(--line);
}

progress::-webkit-progress-bar { background: var(--line); }
progress::-webkit-progress-value { background: var(--accent); }
progress::-moz-progress-bar { background: var(--accent); }

.featured-work {
  padding: var(--space-5);
  border-inline-start: 3px solid var(--line);
  border-radius: var(--radius-inner);
  background: var(--surface-muted);
}

.featured-work strong {
  display: block;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.015em;
}

.featured-work p + p {
  margin-block-start: var(--space-1);
  color: var(--ink-muted);
}

.data-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--space-3);
  padding-block: var(--space-3);
  border-block-end: 1px solid var(--line);
}

.commit-counts {
  color: var(--ink-muted);
  font-size: 13px;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.split-block {
  display: grid;
  gap: var(--space-6);
}

.split-block h3 { margin-block-start: 0; }

.text-list li {
  padding-block: var(--space-3);
  border-block-end: 1px solid var(--line);
}

.stale {
  color: var(--ink);
  font-weight: 600;
  text-decoration: underline;
  text-decoration-color: var(--ink-muted);
  text-underline-offset: 3px;
}

.notice {
  margin-block-start: var(--space-5);
  padding: var(--space-4) var(--space-5);
  border-inline-start: 3px solid var(--ink);
  border-radius: var(--radius-control);
  background: var(--surface);
  box-shadow: var(--shadow-card);
  font-weight: 500;
}

.notice-error { color: var(--ink); }

.raw-output {
  max-block-size: 360px;
  margin: 0;
  padding: var(--space-4);
  overflow: auto;
  border-radius: var(--radius-inner);
  background: var(--surface-muted);
  color: var(--ink);
  font: 12px/1.55 ui-monospace, SFMono-Regular, Menlo, monospace;
  white-space: pre-wrap;
}

.login-page { min-block-size: 100dvh; }

.login-shell {
  min-block-size: 100dvh;
  display: grid;
  place-items: center;
  padding: var(--space-6) var(--space-4);
}

.login-card {
  inline-size: min(100%, 420px);
  padding: var(--space-8);
  border-radius: var(--radius-card);
  background: var(--surface);
  box-shadow: var(--shadow-card);
}

.brand-mark {
  display: grid;
  place-items: center;
  inline-size: 48px;
  block-size: 48px;
  margin-block-end: var(--space-6);
  border-radius: var(--radius-control);
  background: var(--ink);
  color: var(--surface);
}

.login-card h1 {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.login-copy {
  max-inline-size: 34ch;
  margin-block: var(--space-2) var(--space-8);
  color: var(--ink-muted);
}

.login-card label {
  display: block;
  margin-block-end: var(--space-2);
  color: var(--ink-muted);
  font-size: 13px;
  font-weight: 500;
}

.login-card input {
  inline-size: 100%;
  min-block-size: 48px;
  padding-inline: var(--space-3);
  border: 1px solid var(--ink-muted);
  border-radius: var(--radius-control);
  background: var(--surface);
  color: var(--ink);
  transition: border-color 120ms ease-out;
}

.login-card input:hover { border-color: var(--ink-muted); }

.login-card input:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgb(0 113 227 / 0.18);
}

.primary-button {
  inline-size: 100%;
  margin-block-start: var(--space-4);
  padding-inline: var(--space-4);
  background: var(--accent);
  color: var(--surface);
  font-weight: 600;
}

.primary-button:hover { opacity: 0.88; }

.form-message {
  min-block-size: 22px;
  margin-block-start: var(--space-2);
  color: var(--ink);
  font-size: 13px;
  font-weight: 500;
}

@media (min-width: 640px) {
  .dashboard { padding: var(--space-8) var(--space-6) var(--space-12); }
  .panel { padding: var(--space-8); }
  .metric-grid { gap: 0; }
  .metric-card { padding-inline: var(--space-5); }
  .metric-card:nth-child(odd) {
    padding-inline-start: var(--space-5);
    border-inline-start: 1px solid var(--line);
  }
  .metric-card:first-child {
    padding-inline-start: 0;
    border-inline-start: 0;
  }
  .metric-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .split-block { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 820px) {
  .dashboard-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: var(--space-6);
    margin-block-start: var(--space-6);
  }
  .stack { gap: var(--space-6); }
}

@media (max-width: 420px) {
  .button-label { display: none; }
  .header-actions { gap: 0; }
  .login-card { padding: var(--space-6); }
}

@media (max-width: 359px) {
  .metric-grid { grid-template-columns: minmax(0, 1fr); }
  .metric-card,
  .metric-card:nth-child(odd) {
    padding: var(--space-4) 0;
    border-inline-start: 0;
    border-block-start: 1px solid var(--line);
  }
  .metric-card:first-child { border-block-start: 0; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }

  .icon-button:active,
  .text-button:active,
  .primary-button:active { transform: none; }
}