.settings-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 1.5rem; }
.setting-card { background-color: var(--card-background); border-radius: var(--border-radius); padding: 1.5rem; box-shadow: var(--shadow-soft); display: flex; flex-direction: column; gap: 1.5rem; border: 1px solid var(--border-color); }
.setting-card.full-width { grid-column: 1 / -1; }
.setting-card h2 { font-size: 1.25rem; font-weight: 600; padding-bottom: 1rem; border-bottom: 1px solid var(--border-color); display: flex; align-items: center; gap: 0.75rem; color: var(--text-primary); }
.setting-item, .setting-item-vertical { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.setting-item-vertical { flex-direction: column; align-items: flex-start; }
.setting-item label, .setting-item-vertical label { font-weight: 500; color: var(--text-secondary); }
.form-input, .form-select { width: 100%; padding: 0.75rem 1rem; border-radius: 8px; border: 1px solid var(--border-color); background-color: var(--background-color); color: var(--text-primary); font-size: 1rem; font-family: var(--font-family); transition: border-color var(--transition-speed), box-shadow var(--transition-speed); }
.setting-item .form-select, .setting-item .form-input { width: auto; min-width: 200px; }
.form-input:focus, .form-select:focus { outline: none; border-color: var(--accent-color); box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2); }
.btn-primary { background-color: var(--primary-color); color: white; padding: 0.75rem 1.25rem; border: none; border-radius: 8px; font-weight: 600; cursor: pointer; transition: background-color var(--transition-speed); align-self: flex-start; }
.btn-primary:hover { background-color: var(--accent-color); }
.btn-primary i { margin-right: 0.5rem; }
.font-size-selector { display: flex; gap: 0.5rem; }
.font-size-selector button { width: 40px; height: 40px; border-radius: 8px; border: 2px solid var(--border-color); background-color: var(--background-color); color: var(--text-secondary); font-weight: bold; cursor: pointer; transition: all var(--transition-speed); }
.font-size-selector button.active { background-color: var(--primary-color); color: white; border-color: var(--primary-color); }
.font-size-selector button[data-size="s"] { font-size: 0.8rem; }
.font-size-selector button[data-size="m"] { font-size: 1rem; }
.font-size-selector button[data-size="l"] { font-size: 1.2rem; }