:root {
  color-scheme: light dark;
  --bg: #f4f5f7;
  --surface: #ffffff;
  --border: #d8dbe0;
  --text: #1c1f24;
  --text-muted: #6b7280;
  --accent: #3457d5;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

header.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.25rem;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

header.topbar a {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}

main {
  padding: 1.25rem;
}

.login-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

.login-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
  width: 100%;
  max-width: 360px;
}

.login-card input {
  width: 100%;
  padding: 0.5rem;
  margin: 0.5rem 0 1rem;
  border: 1px solid var(--border);
  border-radius: 4px;
}

.login-card button,
.btn {
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 4px;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  font-size: 0.9rem;
}

.error {
  color: #c0392b;
  margin-bottom: 0.5rem;
}

.project-list {
  list-style: none;
  padding: 0;
  display: grid;
  gap: 0.75rem;
  max-width: 640px;
}

.project-list li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.9rem 1.1rem;
}

.project-list a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.board {
  display: flex;
  gap: 1rem;
  overflow-x: auto;
  align-items: flex-start;
}

.column {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  min-width: 260px;
  max-width: 280px;
  flex: 0 0 auto;
  padding: 0.75rem;
}

.column h3 {
  margin: 0 0 0.6rem;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.dot {
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.6rem 0.7rem;
  margin-bottom: 0.6rem;
  font-size: 0.9rem;
}

.card-title {
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.card select {
  width: 100%;
  font-size: 0.8rem;
  margin-top: 0.35rem;
}

.new-card {
  display: flex;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.new-card input {
  flex: 1;
  padding: 0.35rem;
  border: 1px solid var(--border);
  border-radius: 4px;
}

.muted {
  color: var(--text-muted);
  font-size: 0.85rem;
}