/* reset & variables */
:root {
  --primary: #667eea;
  --primary-hover: #5568d3;
  --remove: #ef4444;
  --remove-hover: #dc2626;
  --bg-light: #f0f4ff;
  --radius: 0 20px 0 20px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: "Inter", sans-serif;
  background: var(--bg-light);
  color: #333;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

/* container */
.app-container {
  background: #fff;
  padding: 30px;
  border-radius: var(--radius);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  max-width: 400px;
  width: 90%;
  text-align: center;
}

h1 {
  color: var(--primary);
  margin-bottom: 20px;
  font-size: 1.75rem;
  font-weight: 600;
}

/* input form */
.input-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}

input, button {
  padding: 12px;
  border-radius: var(--radius);
  font-size: 0.95rem;
}

input { border: 2px solid #ddd; transition: border-color 0.2s; }
input:focus { outline: none; border-color: var(--primary); }

button {
  background: var(--primary);
  color: white;
  border: none;
  cursor: pointer;
  font-weight: 500;
  transition: background 0.2s;
}

button:hover { background: var(--primary-hover); }

/* bookmark list */
#bookmark-list { list-style: none; padding: 0; }

#bookmark-list li {
  background: #f9f9f9;
  padding: 12px;
  border: 1px solid #ddd;
  border-radius: var(--radius);
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: transform 0.2s;
}

#bookmark-list li:hover { transform: translateX(4px); }

#bookmark-list a {
  color: var(--primary);
  text-decoration: none;
  font-weight: 500;
}

#bookmark-list a:hover { text-decoration: underline; }

#bookmark-list button {
  background: var(--remove);
  padding: 6px 12px;
  font-size: 0.85rem;
}

#bookmark-list button:hover { background: var(--remove-hover); }