:root {
  --navy: #1b2a4a;
  --navy-dark: #121c33;
  --navy-mid: #243556;
  --accent: #3d7eff;
  --accent-soft: #e8f0ff;
  --todo: #5b6b8c;
  --progress: #d97706;
  --done: #059669;
  --bg: #eef1f6;
  --card: #ffffff;
  --text: #1a1f2e;
  --muted: #6b7280;
  --border: #d8dee9;
  --danger: #dc2626;
  --radius: 10px;
  --shadow: 0 2px 8px rgba(27, 42, 74, 0.08);
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.preview-banner {
  background: #b45309;
  color: #fff;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.45rem 1rem;
  letter-spacing: 0.02em;
}

.topbar {
  background: var(--navy);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.25rem;
  box-shadow: var(--shadow);
}
.topbar h1 {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
}
.topbar .meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
}
.topbar a {
  color: #c8d6f0;
  text-decoration: none;
}
.topbar a:hover { color: #fff; }
.badge {
  display: inline-block;
  background: var(--navy-mid);
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.25rem;
}

.flash {
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}
.flash.ok { background: #d1fae5; color: #065f46; }
.flash.err { background: #fee2e2; color: #991b1b; }

.auth-card {
  max-width: 420px;
  margin: 2.5rem auto;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.75rem;
  border-top: 4px solid var(--navy);
}
.auth-card h2 { margin: 0 0 0.35rem; color: var(--navy); }
.auth-card p.sub { margin: 0 0 1.25rem; color: var(--muted); font-size: 0.9rem; }

label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin: 0.75rem 0 0.3rem;
  color: var(--navy);
}
input[type="text"],
input[type="email"],
input[type="password"],
select,
textarea {
  width: 100%;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font: inherit;
  background: #fff;
}
textarea { min-height: 80px; resize: vertical; }
button, .btn {
  display: inline-block;
  background: var(--navy);
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 0.55rem 1rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
button:hover, .btn:hover { background: var(--navy-dark); }
button.secondary, .btn.secondary {
  background: #fff;
  color: var(--navy);
  border: 1px solid var(--border);
}
button.danger, .btn.danger { background: var(--danger); }
button.small, .btn.small { padding: 0.3rem 0.6rem; font-size: 0.8rem; }
.form-actions { margin-top: 1rem; display: flex; gap: 0.5rem; flex-wrap: wrap; }

.board-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 1rem;
}
.board-toolbar form.new-task {
  display: grid;
  grid-template-columns: 2fr 1.2fr 1fr 1.5fr auto;
  gap: 0.5rem;
  align-items: end;
  flex: 1;
  background: var(--card);
  padding: 0.85rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.board-toolbar form.new-task > div { min-width: 0; }
.board-toolbar form.new-task label { margin-top: 0; }

.kanban {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  align-items: start;
}
@media (max-width: 900px) {
  .kanban { grid-template-columns: 1fr; }
  .board-toolbar form.new-task { grid-template-columns: 1fr; }
}

.column {
  background: #e4e9f2;
  border-radius: var(--radius);
  min-height: 280px;
  padding: 0.75rem;
  border: 2px solid transparent;
  transition: border-color 0.15s, background 0.15s;
}
.column.drag-over {
  border-color: var(--accent);
  background: var(--accent-soft);
}
.column-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.65rem;
  padding: 0.25rem 0.15rem;
}
.column-header h3 {
  margin: 0;
  font-size: 0.95rem;
  color: var(--navy);
}
.column-header .count {
  background: var(--navy);
  color: #fff;
  border-radius: 999px;
  font-size: 0.75rem;
  padding: 0.1rem 0.45rem;
}
.column[data-status="todo"] .column-header h3 { color: var(--todo); }
.column[data-status="in_progress"] .column-header h3 { color: var(--progress); }
.column[data-status="done"] .column-header h3 { color: var(--done); }

.card {
  background: var(--card);
  border-radius: 8px;
  padding: 0.75rem;
  margin-bottom: 0.6rem;
  box-shadow: var(--shadow);
  cursor: grab;
  border-left: 4px solid var(--navy);
}
.card:active { cursor: grabbing; }
.card.dragging { opacity: 0.5; }
.card h4 {
  margin: 0 0 0.35rem;
  font-size: 0.95rem;
  color: var(--navy);
}
.card .notes {
  font-size: 0.82rem;
  color: var(--muted);
  margin: 0 0 0.5rem;
  white-space: pre-wrap;
}
.card .assignee {
  font-size: 0.78rem;
  color: var(--navy-mid);
  font-weight: 600;
}
.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.55rem;
}
.card-actions select {
  width: auto;
  max-width: 140px;
  padding: 0.25rem 0.4rem;
  font-size: 0.78rem;
}

.panel {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
  margin-bottom: 1rem;
}
.panel h2 { margin: 0 0 0.75rem; color: var(--navy); font-size: 1.1rem; }
.invite-box {
  background: var(--accent-soft);
  border: 1px dashed var(--accent);
  border-radius: 8px;
  padding: 0.75rem;
  word-break: break-all;
  font-family: ui-monospace, monospace;
  font-size: 0.85rem;
  margin: 0.5rem 0 1rem;
}
table.members {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}
table.members th, table.members td {
  text-align: left;
  padding: 0.55rem 0.4rem;
  border-bottom: 1px solid var(--border);
}
table.members th { color: var(--navy); font-size: 0.8rem; text-transform: uppercase; }

.footer-note {
  text-align: center;
  color: var(--muted);
  font-size: 0.8rem;
  padding: 1.5rem 1rem 2rem;
}