/* Professional modern UI */
:root {
  --bg: #f0f4f8;
  --card: #ffffff;
  --text: #1f2937;
  --accent: #2563eb;
  --light: #9ca3af;
  --radius: 12px;
  --shadow: 0 4px 16px rgba(0,0,0,0.08);
}

:root.dark {
  --bg: #0f172a;
  --card: #1e293b;
  --text: #e2e8f0;
  --accent: #38bdf8;
  --light: #64748b;
  --shadow: 0 4px 20px rgba(0,0,0,0.4);
}

body {
  margin: 0;
  font-family: Inter, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.app-header {
  padding: 18px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--card);
  box-shadow: var(--shadow);
}

.container {
  max-width: 800px;
  margin: auto;
  padding: 24px;
}

.add-task-card,
.task-list {
  background: var(--card);
  padding: 20px;
  margin: 20px 0;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

#task-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

#task-input,
#priority {
  padding: 12px;
  border-radius: 8px;
  border: 1px solid var(--light);
  background: transparent;
  color: var(--text);
}

#task-form button {
  padding: 12px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 10px;
  cursor: pointer;
}

.task-item {
  background: var(--card);
  padding: 14px;
  border: 1px solid var(--light);
  border-radius: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.priority-high { border-left: 6px solid #ef4444; }
.priority-medium { border-left: 6px solid #f59e0b; }
.priority-low { border-left: 6px solid #10b981; }

.task-actions button {
  margin-left: 10px;
  background: transparent;
  color: var(--accent);
  border: none;
  cursor: pointer;
  font-size: 16px;
}

.footer {
  text-align: center;
  padding: 16px;
  color: var(--light);
}