:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f8fafc;
  color: #0f172a;
}

[data-theme="dark"] {
  color-scheme: dark;
  background: #111827;
  color: #f8fafc;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: color-mix(in srgb, var(--accent) 7%, #f8fafc);
}

button,
input {
  font: inherit;
}

.app-shell {
  min-height: 100vh;
  padding: 24px;
}

.topbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(15, 23, 42, 0.12);
}

.topbar h1,
.login-panel h1 {
  margin: 0;
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  line-height: 1.1;
  letter-spacing: 0;
}

.topbar p {
  max-width: 68ch;
  margin: 8px 0 0;
  color: #475569;
}

.sync-pill {
  min-width: 112px;
  padding: 7px 10px;
  border-radius: 999px;
  background: #ffffff;
  color: #334155;
  text-align: center;
  font-size: 0.875rem;
  border: 1px solid rgba(15, 23, 42, 0.12);
}

.board-placeholder {
  margin-top: 24px;
  min-height: 360px;
  border: 1px dashed rgba(15, 23, 42, 0.25);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  display: grid;
  align-content: center;
  justify-items: center;
  padding: 32px;
  text-align: center;
}

.board-placeholder h2 {
  margin: 0;
  font-size: 1rem;
}

.board-placeholder p {
  margin: 8px 0 0;
  color: #64748b;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
}

.login-panel {
  width: min(420px, 100%);
  display: grid;
  gap: 16px;
  padding: 24px;
  border-radius: 8px;
  background: #ffffff;
  border: 1px solid rgba(15, 23, 42, 0.12);
  box-shadow: 0 20px 60px rgba(15, 23, 42, 0.12);
}

.login-panel label {
  display: grid;
  gap: 6px;
  color: #334155;
}

.login-panel input {
  width: 100%;
  border: 1px solid rgba(15, 23, 42, 0.18);
  border-radius: 6px;
  padding: 10px 12px;
}

.login-panel button {
  border: 0;
  border-radius: 6px;
  padding: 10px 12px;
  color: #ffffff;
  background: var(--accent);
  cursor: pointer;
}

.login-panel p {
  min-height: 20px;
  margin: 0;
  color: #475569;
}

@media (max-width: 640px) {
  .app-shell {
    padding: 16px;
  }

  .topbar {
    display: grid;
  }

  .sync-pill {
    width: fit-content;
  }
}