/* styles.css - Modern, responsive, accessible task manager styles */
:root {
  --primary: #4f8cff;
  --accent: #ffb347;
  --danger: #ff4f4f;
  --bg: #f7f9fa;
  --text: #222;
  --radius: 0.5rem;
  --shadow: 0 2px 8px rgba(0,0,0,0.07);
}

body {
  font-family: 'Segoe UI', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

body.dark-mode {
  --primary: #4f8cff;
  --accent: #ffb347;
  --danger: #ff4f4f;
  --bg: #181a1b;
  --text: #f7f9fa;
}

body.dark-mode {
  background: var(--bg);
  color: var(--text);
}

main {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem;
  margin-top: 2rem;
  width: 100%;
  max-width: 400px;
}

body.dark-mode main {
  background: #23272b;
  box-shadow: 0 2px 8px rgba(0,0,0,0.25);
}

h1 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  text-align: center;
}

form {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

input[type="text"] {
  flex: 1;
  padding: 0.75rem;
  border: 1px solid #ddd;
  border-radius: var(--radius);
  font-size: 1rem;
}

button[type="submit"] {
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 0.75rem 1.25rem;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
}

button[type="submit"]:hover {
  background: #3466c2;
}

ul.task-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

li.task {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #f2f4f7;
  border-radius: var(--radius);
  margin-bottom: 0.75rem;
  padding: 0.75rem 1rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.03);
  transition: background 0.2s;
}

body.dark-mode li.task {
  background: #2c3136;
  color: #cfd8dc;
}

li.task.completed {
  background: #e0f7e9;
  text-decoration: line-through;
  color: #888;
}

body.dark-mode li.task.completed {
  background: #1e2e24;
  color: #7fcba0;
}

.task-label {
  flex: 1;
  cursor: pointer;
  font-size: 1rem;
}

.task-actions {
  display: flex;
  gap: 0.5rem;
}

button.delete-btn {
  background: var(--danger);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 0.5rem 0.75rem;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.2s;
}

button.delete-btn:hover {
  background: #c23c3c;
}

.filter-nav {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.filter-btn {
  background: #e7eaf0;
  color: var(--text);
  border: none;
  border-radius: var(--radius);
  padding: 0.5rem 1.1rem;
  font-size: 1rem;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0,0,0,0.03);
  transition: background 0.2s, color 0.2s;
}

body.dark-mode .filter-btn {
  background: #393e46;
  color: #b0b8c1;
}

.filter-btn[aria-pressed="true"] {
  background: var(--primary);
  color: #fff;
}

body.dark-mode .filter-btn[aria-pressed="true"] {
  background: var(--primary);
  color: #fff;
}

.filter-btn:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

body.dark-mode .filter-btn:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.dark-toggle-btn {
  display: block;
  margin: 0 auto 1.25rem auto;
  background: #e7eaf0;
  color: var(--text);
  border: none;
  border-radius: var(--radius);
  padding: 0.5rem 1.1rem;
  font-size: 1rem;
  cursor: pointer;
  box-shadow: 0 1px 3px rgba(0,0,0,0.03);
  transition: background 0.2s, color 0.2s;
}

body.dark-mode .dark-toggle-btn {
  background: #23272b;
  color: #f7f9fa;
}

.dark-toggle-btn:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

@media (max-width: 500px) {
  main {
    padding: 1rem;
    margin-top: 1rem;
    max-width: 98vw;
  }
  h1 {
    font-size: 1.5rem;
  }
  input[type="text"], button[type="submit"] {
    font-size: 0.95rem;
    padding: 0.5rem;
  }
  .filter-nav {
    gap: 0.25rem;
    margin-bottom: 1rem;
  }
  .filter-btn {
    font-size: 0.95rem;
    padding: 0.4rem 0.7rem;
  }
}