* {
  box-sizing: border-box;
}

:root {
  --bg: #f4f6fb;
  --panel: #ffffff;
  --border: #e3e6ee;
  --text: #1f2330;
  --muted: #6b7280;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --danger: #dc2626;
  --todo: #f59e0b;
  --progress: #3b82f6;
  --done: #16a34a;
  --shadow: 0 2px 4px rgba(15, 23, 42, 0.06);
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.muted {
  color: var(--muted);
  font-size: 14px;
}

.error {
  color: var(--danger);
  min-height: 1.2em;
  margin: 8px 0;
  font-size: 14px;
}

/* Buttons */
.btn {
  padding: 8px 14px;
  border-radius: 6px;
  border: 1px solid transparent;
  font-size: 14px;
  cursor: pointer;
  background: #fff;
  transition: background 120ms ease;
}
.btn.primary {
  background: var(--primary);
  color: #fff;
}
.btn.primary:hover {
  background: var(--primary-hover);
}
.btn.ghost {
  background: transparent;
  border-color: var(--border);
}
.btn.danger {
  background: transparent;
  color: var(--danger);
  border-color: var(--border);
}
.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* Auth page */
.auth-body {
  display: grid;
  place-items: center;
  padding: 24px;
}
.auth-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 28px;
  width: 100%;
  max-width: 380px;
  box-shadow: var(--shadow);
}
.auth-card h1 {
  margin: 0 0 16px;
  font-size: 24px;
}
.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}
.tab {
  flex: 1;
  padding: 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: #fff;
  cursor: pointer;
  font-size: 14px;
}
.tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.form label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 14px;
}
.form input {
  padding: 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  font-size: 14px;
}

/* Dashboard */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.topbar h1 {
  margin: 0;
  font-size: 18px;
}
.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.board-wrapper {
  padding: 24px;
  max-width: 1200px;
  margin: 0 auto;
}

.new-task {
  display: grid;
  grid-template-columns: 2fr 2fr 1fr auto;
  gap: 8px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 16px;
}
.new-task input,
.new-task select {
  padding: 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
  font-size: 14px;
}

.board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.column {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  min-height: 200px;
}
.column header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.column h2 {
  margin: 0;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.column[data-stage="todo"] h2 {
  color: var(--todo);
}
.column[data-stage="in_progress"] h2 {
  color: var(--progress);
}
.column[data-stage="done"] h2 {
  color: var(--done);
}
.count {
  font-size: 13px;
  color: var(--muted);
}

.task-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.task-card {
  background: #fbfbfd;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px;
}
.task-card .title {
  font-weight: 600;
}
.task-card .description {
  color: var(--muted);
  font-size: 13px;
  margin-top: 4px;
  white-space: pre-wrap;
}
.task-card .actions {
  display: flex;
  gap: 6px;
  margin-top: 8px;
  align-items: center;
  flex-wrap: wrap;
}
.task-card .actions select {
  padding: 4px 6px;
  font-size: 13px;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: #fff;
}
.task-card .actions button {
  padding: 4px 8px;
  font-size: 13px;
}

/* Responsive */
@media (max-width: 800px) {
  .board {
    grid-template-columns: 1fr;
  }
  .new-task {
    grid-template-columns: 1fr 1fr;
  }
  .new-task #add-btn {
    grid-column: 1 / -1;
  }
}
@media (max-width: 480px) {
  .new-task {
    grid-template-columns: 1fr;
  }
  .topbar h1 {
    font-size: 16px;
  }
  .topbar-right #user-email {
    display: none;
  }
}